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 Fix "spam" ACL condition. Previously, tainted values for the "name"
59 argument resulted in a trap. There is no reason to disallow such; this
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.
79 JH/01 Avoid costly startup code when not strictly needed. This reduces time
80 for some exim process initialisations. It does mean that the logging
81 of TLS configuration problems is only done for the daemon startup.
83 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
85 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
86 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
89 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
90 DKIM signing is being done. Previously a transport_filter would always
91 disable CHUNKING, falling back to traditional DATA.
93 JH/05 Regard command-line receipients as tainted.
95 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
97 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
98 PAM library frees one of the arguments given to it, despite the
99 documentation. Therefore a plain malloc must be used.
101 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
102 on-stack buffers were used, resulting in a taint trap when DSN information
103 copied from a received message was written into the buffer.
105 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
106 the ordering of its ARC headers. This caused a crash.
108 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
109 a new record was being constructed with information from the peer, a trap
112 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
113 installation would get error messages from DMARC verify, when it hit the
114 nonexistent file indicated by the default. Distros wanting DMARC enabled
115 should both provide the file and set the option.
116 Also enforce no DMARC verification for command-line sourced messages.
118 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
119 could, depending on the platform, hang at the STARTTLS response.
121 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
122 message on a connection. Previously if one message had ARC headers and
123 the following one did not, a crash could result when adding an
124 Authentication-Results: header.
126 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
127 Exim main code and Exim-related utities. The introduction of taint
128 tracking also did many adjustments to string handling. Since then, eximon
129 frequently terminated with an assert failure.
131 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
132 check for 452 responses. This slightly helps the inefficieny of doing
133 a large alias-expansion into a recipient-limited target. The max_rcpt
134 transport option still applies (and at the current default, will override
135 the new feature). The check is done for either cause of synch, and forces
136 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
137 connection. The new facility is not tunable at this time.
139 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
140 library live data was being used, so the results became garbage. Make
141 copies while it is still usable.
143 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
144 on delivery deferred (==) and failed (**) lines (if a delivery was
145 attemtped). Previously it was only on completion (=>) lines.
147 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
148 for the expansion of the server_scram_iter and server_scram_salt options.
150 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
151 are now specifically given a NO_DATA response without hitting the system
152 resolver. The library goes on to do the now-standard TXT lookup.
153 Use of dnsdb lookups is not affected.
155 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
156 only retrieve the errormessage once. Previously two calls to dlerror()
157 were used, and the second one (for mainlog/paniclog) retrieved null
160 JH/20 Taint checking: disallow use of tainted data for
161 - the appendfile transport file and directory options
162 - the pipe transport command
163 - the autoreply transport file, log and once options
164 - file names used by the redirect router (including filter files)
166 - paths used by single-key lookups
167 Previously this was permitted.
169 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
170 adjusted the size of a major service buffer; this failed because the
171 buffer was in use at the time. Change to a compile-time increase in the
172 buffer size, when this authenticator is compiled into exim.
174 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
175 previous fast-mode was untenable in the face of glibs using mmap to
176 support larger malloc requests.
178 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
179 New values supported, if defined on system where compiled:
180 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
181 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
183 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
184 running a limited number of proceses in parallel, a benefit is gained. The
185 amount varies with the platform hardware and load. The use of the option
186 queue_run_in_order means we cannot do this, as ordering becomes
189 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
190 had introduced a string-copy (for ensuring NUL-termination) which was not
191 appropriate for that case, which can include embedded NUL bytes in the
192 block of data. Investigation showed the copy to actually be needless, the
193 data being length-specified.
195 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
196 done during a receiving connection, and both used TLS, global info was
197 used rather than per-connection info for tracking the state of data
198 queued for transmission. This could result in a connection hang.
200 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
201 Previously, when delivering serveral messages down a single connection
202 only the first would provide a SIZE. This was due to the size information
203 not being properly tracked.
205 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
206 TAI (at 37 seconds currently), pretend to be in UTC for time-related
207 expansion and logging. Previously, spurious values such as a future
208 minute could be seen.
210 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
211 it could crash from a null-deref. This could also affect the
212 ${addresses: } operator and ${readsock } item.
214 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
215 message following a mime one, the variable was not reset.
217 JH/30 When an pipelined-connect fails at the first response, assume incorrect
218 cached capability (perhaps the peer reneged?) and immediately retry in
221 JH/31 Fix spurious detection of timeout while writing to transport filter.
223 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
224 an attempt to copy the string was made before checking it.
226 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
227 taint of the lookup key was maintained; we now regard the presence in the
228 filesystem as sufficient validation.
230 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
231 argument is supplied.
233 JH/35 The dsearch lookup now requires that the directory is an absolute path.
234 Previously this was not checked, and nonempty relative paths made an
235 access under Exim's current working directory.
237 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
238 Previously no event was raised.
240 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
241 parameter supplied by the sender MAIL FROM command. Previously it was
242 ignored, and only the check_spool_space option value for the required
245 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
246 the size of the signing public-key. Previously it was instead giving
247 the size of the signature hash.
249 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
250 the default. See the (new) dkim_verify_min_keysizes option.
252 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
253 and an ACL use a lookup for checking either the local_part or domain,
254 stale data could be accessed. Ensure that variable references are
255 dropped between messages.
257 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
258 by the client was not checked as pointing within response data before
259 being used. A malicious client could thus cause an out-of-bounds read and
260 possibly gain authentication. Fix by adding the check.
262 JH/42 Internationalisation: change the default for downconversion in the smtp
263 transport to be "if needed". Previously it was "as previously set" for
264 the message, which usually meant "if needed" for message-submission but
265 "no" for everything else. However, MTAs have been seen using SMTPUTF8
266 even when the envelope addresses did not need it, resulting in forwarding
267 failures to non-supporting MTAs. A downconvert in such cases will be
268 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
269 transport. The change does mean that addresses needing conversion will
270 be converted when previously a delivery failure would occur.
272 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
273 response was received it would be used unchecked in a fail-DSN, violating
274 standards on line-length limits. Truncate if needed.
276 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
277 doesn't work. (Additionally add a new main config option to configure the
284 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
285 side, to decode a TLS 1.3 packet capture.
287 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
288 Previously the default library behaviour applied, sending two, each in
291 JH/03 Debug output for ACL now gives the config file name and line number for
294 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
296 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
298 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
299 buffer overrun for (non-chunking) other transports.
301 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
302 TLS1.3, means that a server rejecting a client certificate is not visible
303 to the client until the first read of encrypted data (typically the
304 response to EHLO). Add detection for that case and treat it as a failed
305 TLS connection attempt, so that the normal retry-in-clear can work (if
306 suitably configured).
308 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
309 and/or domain. Found and fixed by Jason Betts.
311 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
312 configuration). If a CNAME target was not a wellformed name pattern, a
315 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
316 the OS reports them interleaved with other addresses.
318 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
319 used both for input and for a verify callout, both encrypted, SMTP
320 responses being sent by the server could be lost. This resulted in
321 dropped connections and sometimes bounces generated by a peer sending
324 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
325 string. Previously it was possible to cause undefined behaviour in a
326 library routine (usually a crash). Found by "zerons".
328 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
331 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
332 API was removed, so update to use the newer ones.
334 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
335 any timeout set, is taking a long time. Previously we would hang on to a
336 rotated logfile "forever" if the input was arriving with long gaps
337 (a previous attempt to fix addressed lack, for a long time, of initial
340 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
341 shared (NFS) environment. The length of the tempfile name is now
342 4 + 16 ("hdr.$message_exim_id") which might break on file
343 systems which restrict the file name length to lower values.
346 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
347 shared (NFS) environment.
349 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
350 did for all versions <4.90). Notably -M, -m, --invert, -I may be
353 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
354 on some platforms for bit 31.
356 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
357 to changes apparently associated with TLS1.3 handling some of the APIs
358 previously used were either nonfunctional or inappropriate. Strings
359 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
360 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
361 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
362 This affects log line X= elements, the $tls_{in,out}_cipher variables,
363 and the use of specific cipher names in the encrypted= ACL condition.
365 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
367 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
368 verification result was not updated unless hosts_require_ocsp applied.
370 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
371 queue_list_requires_admin set to false, non-admin users were denied the
374 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
375 directory-of-certs mode. Previously they were advertised despite the
378 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
379 A single TCP connection by a client will now hold a TLS connection open
380 for multiple message deliveries, by default. Previously the default was to
383 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
384 default. If built with the facility, DANE will be used. The facility
385 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
387 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
388 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
389 must be defined and you must still, unless you define DISABLE_TLS, manage
390 the the include-dir and library-file requirements that go with that
391 choice. Non-TLS builds are still supported.
393 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
396 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
397 default. If the platform supports and has the facility enabled, it will
398 be requested on all coneections.
400 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
401 controlled by the build-time option SUPPORT_PIPE_CONNECT.
403 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
405 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
406 success-DSN messages. Previously the From: header was always the default
407 one for these; the option was ignored.
409 JH/28 Fix the timeout on smtp response to apply to the whole response.
410 Previously it was reset for every read, so a teergrubing peer sending
411 single bytes within the time limit could extend the connection for a
412 long time. Credit to Qualsys Security Advisory Team for the discovery.
414 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
415 delivery address, which leaked information of the results of local
416 forwarding. Change to the original envelope recipient address, per
419 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
420 requested. Previously not bounce was generated and a log entry of
421 error ignored was made.
423 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
425 JH/32 Introduce a general tainting mechanism for values read from the input
426 channel, and values derived from them. Refuse to expand any tainted
427 values, to catch one form of exploit.
429 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
430 was unused and the unexpanded text used for the test. Found and
431 fixed by Ruben Jenster.
433 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
434 an attempt to use a TLS library read routine dereffed a nul pointer,
437 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
438 them in our smtp response.
440 JH/36 Have the general router option retry_use_local_part default to true when
441 any of the restrictive preconditions are set (to anything). Previously it
442 was only for check_local user. The change removes one item of manual
443 configuration which is required for proper retries when a remote router
444 handles a subset of addresses for a domain.
446 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
447 link count into consideration.
449 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
450 caused the extension of big_buffer, the following lines were ignored.
452 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
453 accordance with RFC 2308. Previously there was no expiry, so a longlived
454 receive process (eg. due to ACL delays) versus a short SOA value could
457 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
459 JH/39 Promote DMARC support to mainline.
461 JH/40 Bug 2452: Add a References: header to DSNs.
463 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
464 parameters. The relevant library call is documented as "Deprecated: This
465 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
466 3.6.0, DH parameters are negotiated following RFC7919."
468 HS/06 Change the default of dnssec_request_domains to "*"
470 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
471 carried on and emitted a BDAT command, even when PIPELINING was not
474 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
475 buffer was used for the filename, resulting in a trap when tainted
476 arguments (eg. $domain) were used.
478 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
479 recommended to avoid a possible server-load attack. The feature can be
480 re-enabled via the openssl_options main cofiguration option.
482 JH/45 local_scan API: documented the current smtp_printf() call. This changed
483 for version 4.90 - adding a "more data" boolean to the arguments.
484 Bumped the ABI version number also, this having been missed previously;
485 release versions 4.90 to 4.92.3 inclusive were effectively broken in
486 respect of usage of smtp_printf() by either local_scan code or libraries
487 accessed via the ${dlfunc } expansion item. Both will need coding
488 adjustment for any calls to smtp_printf() to match the new function
489 signature; a FALSE value for the new argument is always safe.
491 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
492 the file-offset (which the Linux syscall does, and exim expects); this
493 resulted in an indefinite loop.
495 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
496 to do ARC verification. The Authentication-Results: header line added
497 by the configuration then had no ARC item.
503 JH/01 Remove code calling the customisable local_scan function, unless a new
504 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
506 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
507 non-signal-safe functions being used.
509 JH/03 Bug 2269: When presented with a received message having a stupidly large
510 number of DKIM-Signature headers, disable DKIM verification to avoid
511 a resource-consumption attack. The limit is set at twenty.
513 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
514 report of oldest_pass in ${authres } in consequence, and separate out
515 some descriptions of reasons for verification fail.
517 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
518 files in the spool were present and unlocked. A queue-runner could spot
519 them, resulting in a duplicate delivery. Fix that by doing the unlock
520 after the unlink. Investigation by Tim Stewart. Take the opportunity to
521 add more error-checking on spoolfile handling while that code is being
524 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
525 No known attacks, no CVE, this is defensive hardening.
527 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
528 a queue-runner could start a delivery while other operations were ongoing.
529 Cutthrough delivery was a common victim, resulting in duplicate delivery.
530 Found and investigated by Tim Stewart. Fix by using the open message data
531 file handle rather than opening another, and not locally closing it (which
532 releases a lock) for that case, while creating the temporary .eml format
533 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
535 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
536 $sender_verify_failure/$recipient_verify_failure to "random".
538 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
541 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
542 Previously this would segfault.
544 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
547 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
548 like zero, since the resolver should be doing this for us, But we need one
549 as a CNAME but no MX presence gets the CNAME returned; we need to check
550 that doesn't point to an MX to declare it "no MX returned" rather than
551 "error, loop". A new main option is added so the older capability of
552 following some limited number of chain links is maintained.
554 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
556 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
557 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
558 now-deprecated earlier definitions used only specified the range up to TLS
559 1.2 (in the older-version library docs).
561 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
563 JH/15 Rework TLS client-side context management. Stop using a global, and
564 explicitly pass a context around. This enables future use of TLS for
565 connections to service-daemons (eg. malware scanning) while a client smtp
566 connection is using TLS; with cutthrough connections this is quite likely.
568 JH/16 Fix ARC verification to do AS checks in reverse order.
570 JH/17 Support a "tls" option on the ${readsocket } expansion item.
572 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
573 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
574 Previously the "utf8" would be re-prepended for every additional message.
576 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
577 Previously thery were accepted, resulting in issues when attempting to
578 forward messages to a non-supporting MTA.
580 PP/02 Let -n work with printing macros too, not just options.
582 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
583 one parent address was copied, and bogus data was used at delivery-logging
584 time. Either a crash (after delivery) or bogus log data could result.
585 Discovery and analysis by Tim Stewart.
587 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
588 Previously if the string ended mid-character, we did not insert the
589 promised '?' replacement.
591 PP/04 Documentation: current string operators work on bytes, not codepoints.
593 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
594 should pack well giving a smaller memory footprint so better caching and
595 therefore performance. Group the declarations where this can't be done so
596 that the byte-sized flag variables are not interspersed among pointer
597 variables, giving a better chance of good packing by the compiler.
599 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
600 non-null, to avoid issues with sites running BATV. Previously reports were
601 sent with an empty envelope sender so looked like bounces.
603 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
604 The ignore_error flag wasn't being returned from the filter subprocess so
605 was not set for later routers. Investigation and fix by Matthias Kurz.
607 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
608 and a msg:complete for the whole, when a message is manually removed using
609 -Mrm. Developement by Matthias Kurz, hacked on by JH.
611 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
612 a "Gnu special" function, asprintf() in the DB utility binary builds; I
613 hope that is portable enough.
615 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
616 requiring a known-CA anchor certificate; make it now rely entirely on the
617 TLSA as an anchor. Checking the name on the leaf cert against the name
618 on the A-record for the host is still done for TA (but not for EE mode).
620 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
621 included in delivery lines for non-proxied connections, when compiled with
622 SUPPORT_SOCKS and running with proxy logging enabled.
624 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
625 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
626 move the existing event to fire before the normal logging of message
627 failure so that custom logging is bracketed by normal logging.
629 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
630 msg:fail:internal event. Developement by Matthias Kurz.
632 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
633 far too small for todays use of crypto signatures stored there. Go all
634 the way to the max DNS message size of 64kB, even though this might be
635 overmuch for IOT constrained device use.
637 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
638 copy a string over itself. The library routine is documented as not
639 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
641 JH/32 For main options check_spool_space and check_inode_space, where the
642 platform supports 64b integers, support more than the previous 2^31 kB
643 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
644 the previous G, M, k.
646 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
647 $authenticated_fail_id variable on authentication failure. Previously
650 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
651 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
652 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
653 GNUTLS_SEC_PARAM_MEDIUM.
655 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
656 side. Previously we would continue as if no SNI had been received.
658 JH/36 Harden the handling of string-lists. When a list consisted of a sole
659 "<" character, which should be a list-separator specification, we walked
660 off past the nul-terimation.
662 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
663 causes) even when the retry time is not yet met. Previously they were
664 not, meaning that when (say) an account was over-quota and temp-rejecting,
665 and multiple senders' messages were queued, only one sender would get
666 notified on each configured delay_warning cycle.
668 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
670 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
671 cipher-suites, an error can be left on the stack even for a succeeding
672 accept; this results in impossible error messages when a later operation
675 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
676 return error codes indicating retry. Under TLS1.3 this becomes required.
678 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
679 it only wrote the new authenticators, resulting in a lack of tracking of
680 peer changes of ESMTP extensions until the next cache flush.
682 JH/41 Fix the loop reading a message header line to check for integer overflow,
683 and more-often against header_maxsize. Previously a crafted message could
684 induce a crash of the recive process; now the message is cleanly rejected.
686 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
687 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
693 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
694 When redis_servers is set to a list of > 1 element, and the Redis servers
695 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
696 case of MOVED into a DEFER case instead, thus moving the query onto the
697 next server in the list. For a cluster of N elements, all N servers must
698 be defined in redis_servers.
700 GF/02 Catch and remove uninitialized value warning in exiqsumm
701 Check for existence of @ARGV before looking at $ARGV[0]
703 JH/01 Replace the store_release() internal interface with store_newblock(),
704 which internalises the check required to safely use the old one, plus
705 the allocate and data copy operations duplicated in both (!) of the
706 extant use locations.
708 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
709 modifier. This matches the restriction on the commandline.
711 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
712 Previously only the last row was returned.
714 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
715 we assumed that tags in the header were well-formed, and parsed the
716 element content after inspecting only the first char of the tag.
717 Assumptions at that stage could crash the receive process on malformed
720 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
721 While running the DKIM ACL we operate on the Permanent memory pool so that
722 variables created with "set" persist to the DATA ACL. Also (at any time)
723 DNS lookups that fail create cache records using the Permanent pool. But
724 expansions release any allocations made on the current pool - so a dnsdb
725 lookup expansion done in the DKIM ACL releases the memory used for the
726 DNS negative-cache, and bad things result. Solution is to switch to the
727 Main pool for expansions.
728 While we're in that code, add checks on the DNS cache during store_reset,
729 active in the testsuite.
730 Problem spotted, and debugging aided, by Wolfgang Breyha.
732 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
733 When none of the hosts presented to a transport match an already-open
734 connection, close it and proceed with the list. Previously we would
735 queue the message. Spotted by Lena with Yahoo, probably involving
738 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
739 Previously a spurious "250 OK id=" response was appended to the proper
742 JH/08 The "support for" informational output now, which built with Content
743 Scanning support, has a line for the malware scanner interfaces compiled
744 in. Interface can be individually included or not at build time.
746 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
747 by the template makefile "src/EDITME". The "STREAM" support for an older
748 ClamAV interface method is removed.
750 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
751 rows affected is given instead).
753 JH/11 The runtime Berkeley DB library version is now additionally output by
754 "exim -d -bV". Previously only the compile-time version was shown.
756 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
757 SMTP connection. Previously, when one had more receipients than the
758 first, an abortive onward connection was made. Move to full support for
759 multiple onward connections in sequence, handling cutthrough connection
760 for all multi-message initiating connections.
762 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
763 routers. Previously, a multi-recipient message would fail to match the
764 onward-connection opened for the first recipient, and cause its closure.
766 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
767 a timeout on read on a GnuTLS initiating connection, resulting in the
768 initiating connection being dropped. This mattered most when the callout
769 was marked defer_ok. Fix to keep the two timeout-detection methods
772 JH/15 Relax results from ACL control request to enable cutthrough, in
773 unsupported situations, from error to silently (except under debug)
774 ignoring. This covers use with PRDR, frozen messages, queue-only and
777 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
779 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
780 metadata, resulting in a crash in free().
782 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
783 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
784 Broken also in d185889f4, with init system revamp.
786 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
787 Previously we abruptly closed the connection after reading a malware-
788 found indication; now we go on to read the "scan ok" response line,
791 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
792 ACL. Previously, a crash would result.
794 JH/19 Speed up macro lookups during configuration file read, by skipping non-
795 macro text after a replacement (previously it was only once per line) and
796 by skipping builtin macros when searching for an uppercase lead character.
798 JH/20 DANE support moved from Experimental to mainline. The Makefile control
799 for the build is renamed.
801 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
802 was allocated for every new TLS startup, meaning one per message. Fix
803 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
805 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
806 reported the original. Fix to report (as far as possible) the ACL
807 result replacing the original.
809 JH/23 Fix memory leak during multi-message connections using STARTTLS under
810 OpenSSL. Certificate information is loaded for every new TLS startup,
811 and the resources needed to be freed.
813 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
815 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
818 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
819 DATA response info to the (existing) per-recipient response info for
820 the "C=" log element. It can have useful tracking info from the
821 destination system. Patch from Simon Arlott.
823 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
824 length value. Previously this would segfault.
826 HS/02 Support Avast multiline protoocol, this allows passing flags to
827 newer versions of the scanner.
829 JH/28 Ensure that variables possibly set during message acceptance are marked
830 dead before release of memory in the daemon loop. This stops complaints
831 about them when the debug_store option is enabled. Discovered specifically
832 for sender_rate_period, but applies to a whole set of variables.
833 Do the same for the queue-runner and queue-list loops, for variables set
834 from spool message files. Do the same for the SMTP per-message loop, for
835 certain variables indirectly set in ACL operations.
837 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
838 as a multi-recipient message from a mailinglist manager). The coding had
839 an arbitrary cutoff number of characters while checking for more input;
840 enforced by writing a NUL into the buffer. This corrupted long / fast
841 input. The problem was exposed more widely when more pipelineing of SMTP
842 responses was introduced, and one Exim system was feeding another.
843 The symptom is log complaints of SMTP syntax error (NUL chars) on the
844 receiving system, and refused recipients seen by the sending system
845 (propating to people being dropped from mailing lists).
846 Discovered and pinpointed by David Carter.
848 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
849 replaced by the ${authresults } expansion.
851 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
853 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
854 allows proper process termination in container environments.
856 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
857 Previously the "final dot" had a newline after it; ensure it is CR,LF.
859 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
860 and "err_perm", deprecated since 4.83 when the RFC-defined words
861 "temperror" and "permerror" were introduced.
863 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
864 transport-filters or DKIM-signing. The restriction was lost in the
865 consolidation of verify-callout and delivery SMTP handling.
866 Extend the restriction to also cover ARC-signing.
868 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
869 in defer=pass mode supply a 450 to the initiator. Previously the message
872 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
873 tls_require_ciphers is used as before.
875 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
876 "pass_unscanned". Only tmpfails from the scanner are written to
877 the paniclog, as they may require admin intervention (permission
878 denied, license issues). Other scanner errors (like decompression
879 bombs) do not cause a paniclog entry.
881 JH/36 Fix reinitialisation of DKIM logging variable between messages.
882 Previously it was possible to log spurious information in receive log
885 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
886 triggered odd behaviour from Outlook Express clients.
888 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
891 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
892 since the IETF WG has not yet settled on that versus the original
893 "bare" representation.
895 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
896 Previously the millisecond value corrupted the output.
897 Fix also for syslog_pid=no and log_selector +pid, for which the pid
898 corrupted the output.
904 JH/01 Rework error string handling in TLS interface so that the caller in
905 more cases is responsible for logging. This permits library-sourced
906 string to be attached to addresses during delivery, and collapses
907 pairs of long lines into single ones.
909 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
910 during configuration. Wildcards are allowed and expanded.
912 JH/02 Rework error string handling in DKIM to pass more info back to callers.
913 This permits better logging.
915 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
916 do not close it down and have the child transport start it up again on
917 the passed-on TCP connection. Instead, proxy the child (and any
918 subsequent ones) for TLS via a unix-domain socket channel. Logging is
919 affected: the continued delivery log lines do not have any DNSSEC, TLS
920 Certificate or OCSP information. TLS cipher information is still logged.
922 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
923 identical IP addresses on different listening ports. Will also affect
926 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
927 add noisy ifdef guards to special-case this sillyness.
928 Patch from Bernd Kuhls.
930 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
931 than 255 are no longer allowed.
933 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
934 Disable the session-cache too, which might reduce our load. Since we
935 currrectly use a new context for every connection, both as server and
936 client, there is no benefit for these.
937 GnuTLS appears to not support tickets server-side by default (we don't
938 call gnutls_session_ticket_enable_server()) but client side is enabled
939 by default on recent versions (3.1.3 +) unless the PFS priority string
942 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
943 <https://reproducible-builds.org/specs/source-date-epoch/>.
945 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
946 the check for any unsuccessful recipients did not notice the limit, and
947 erroneously found still-pending ones.
949 JH/08 Pipeline CHUNKING command and data together, on kernels that support
950 MSG_MORE. Only in-clear (not on TLS connections).
952 JH/09 Avoid using a temporary file during transport using dkim. Unless a
953 transport-filter is involved we can buffer the headers in memory for
954 creating the signature, and read the spool data file once for the
955 signature and again for transmission.
957 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
958 4.77 as the kernel support then wasn't solid, having issues in 64bit
959 mode. Now, it's been long enough. Add support for FreeBSD also.
961 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
962 case where the routing stage had gathered several addresses to send to
963 a host before calling the transport for the first, we previously failed
964 to close down TLS in the old transport process before passing the TCP
965 connection to the new process. The new one sent a STARTTLS command
966 which naturally failed, giving a failed delivery and bloating the retry
967 database. Investigation and fix prototype from Wolfgang Breyha.
969 JH/12 Fix check on SMTP command input synchronisation. Previously there were
970 false-negatives in the check that the sender had not preempted a response
971 or prompt from Exim (running as a server), due to that code's lack of
972 awareness of the SMTP input buffering.
974 PP/04 Add commandline_checks_require_admin option.
975 Exim drops privileges sanely, various checks such as -be aren't a
976 security problem, as long as you trust local users with access to their
977 own account. When invoked by services which pass untrusted data to
978 Exim, this might be an issue. Set this option in main configuration
979 AND make fixes to the calling application, such as using `--` to stop
982 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
983 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
984 responses to those, into a single TLS record each way (this usually means
985 a single packet). As a side issue, smtp_enforce_sync now works on TLS
988 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
989 affects you only if you're dancing at the edge of the param size limits.
990 If you are, and this message makes sense to you, then: raise the
991 configured limit or use OpenSSL 1.1. Nothing we can do for older
994 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
995 cmdline element to get the documented default one. Previously it was
998 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
999 are unsuable for non-message-specific reasons - eg. connection timeout,
1000 banner-time rejection.
1002 JH/16 Fix logging of delivery remote port, when specified by router, under
1005 PP/06 Repair manualroute's ability to take options in any order, even if one
1006 is the name of a transport.
1009 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1011 JH/17 Change the list-building routines interface to use the expanding-string
1012 triplet model, for better allocation and copying behaviour.
1014 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1015 Previously it was constructed the first time a possibly-matching string
1016 was met in the configuration file input during startup; now it is done
1019 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1020 compatible one, to avoid the (poorly documented) possibility of a config
1021 file in the working directory redirecting the DB files, possibly correpting
1022 some existing file. CVE-2017-10140 assigned for BDB.
1024 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1025 cache-hot. Previously, although the result was properly cached, the
1026 initial verify call returned a defer.
1028 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1029 the main verify for receipient in uncached-mode.
1031 JH/22 Retire historical build files to an "unsupported" subdir. These are
1032 defined as "ones for which we have no current evidence of testing".
1034 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1035 if present. Previously it was ignored.
1037 JH/24 Start using specified-initialisers in C structure init coding. This is
1038 a C99 feature (it's 2017, so now considered safe).
1040 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1041 if was a fixed-sized field and bitmask ops via macros; it is now more
1044 PP/07 GitHub PR 56: Apply MariaDB build fix.
1045 Patch provided by Jaroslav Škarvada.
1047 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1048 during Coverity cleanups [4.87 JH/47]
1049 Diagnosis and fix provided by Michael Fischer v. Mollard.
1051 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1052 the right size to place the terminating semicolon on its own folded
1053 line, the header hash was calculated to an incorrect value thanks to
1054 the (relaxed) space the fold became.
1056 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1057 and confused the parent.
1059 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1060 which could crash as a result. This could lead to undeliverable messages.
1062 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1065 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1066 matters on fast-turnover and PID-randomising systems, which were getting
1067 out-of-order delivery.
1069 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1070 a possibly-overlapping copy. The symptom was that "Remote host closed
1071 connection in response to HELO" was logged instead of the actual 4xx
1074 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1075 Previously only that bufferd was discarded, resulting in SYMTP command
1078 JH/32 DKIM: when a message has multiple signatures matching an identity given
1079 in dkim_verify_signers, run the dkim acl once for each. Previously only
1080 one run was done. Bug 2189.
1082 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1083 "panic the current process" to "deliberately defer". The panic log is
1084 still written with the problem list name; the mail and reject logs now
1085 get a temp-reject line for the message that was being handled, saying
1086 something like "domains check lookup or other defer". The SMTP 451
1087 message is still "Temporary local problem".
1089 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1090 A crafted sequence of BDAT commands could result in in-use memory beeing
1091 freed. CVE-2017-16943.
1093 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1094 from SMTP input. Previously it was always done; now only done for DATA
1095 and not BDAT commands. CVE-2017-16944.
1097 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1098 to the message (such as an overlong header line). Previously this was
1099 not done and we did not exit BDAT mode. Followon from the previous item
1100 though a different problem.
1106 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1107 than -2003 did; needs libidn2 in addition to libidn.
1109 JH/02 The path option on a pipe transport is now expanded before use.
1111 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1112 Patch provided by "Björn", documentation fix added too.
1114 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1115 missing a wire-to-host endian conversion.
1117 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1118 close after a BDAT command line could be taken as a following command,
1119 giving a synch failure. Fix by only checking for synch immediately
1120 before acknowledging the chunk.
1122 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1123 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1124 macro. Patches provided by Josh Soref.
1126 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1127 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1128 by IANA as a service extension. However, John Klensin suggests that we
1131 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1132 the dkim code may be unix-mode line endings rather than smtp wire-format
1133 CRLF, so prepend a CR to any bare LF.
1135 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1136 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1138 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1139 the first were themselves being wrongly included in the feed into dkim
1140 processing; with most chunk sizes in use this resulted in an incorrect
1141 body hash calculated value.
1143 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1144 DKIM signature block, for verification. Although advised against by
1145 standards it is specifically not ruled illegal.
1147 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1149 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1150 missing a body hash (the bh= tag).
1152 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1153 It seems that HAProxy sends the Proxy Protocol information in clear and
1154 only then does a TLS startup, so do the same.
1156 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1157 TCP connections (such as for Spamd) unless the daemon successfully set
1158 Fast Open mode on its listening sockets. This fixes breakage seen on
1159 too-old kernels or those not configured for Fast Open, at the cost of
1160 requiring both directions being enabled for TFO, and TFO never being used
1161 by non-daemon-related Exim processes.
1163 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1164 endings, at least on the first header line. Try to canonify any that get
1165 past that check, despite the cost.
1167 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1168 now limited to an arbitrary five deep, while parsing addresses with the
1169 strip_excess_angle_brackets option enabled.
1171 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1172 instead leave the unprompted TLS handshake in socket buffer for the
1173 TLS library to consume.
1175 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1177 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1179 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1180 region in one operation, for speed, and this leaves assigned pointers
1181 dangling. Add checks run only under the testsuite which checks all
1182 variables at a store-reset and panics on a dangling pointer; add code
1183 explicitly nulling out all the variables discovered. Fixes one known
1184 bug: a transport crash, where a dangling pointer for $sending_ip_address
1185 originally assigned in a verify callout, is re-used.
1187 PP/06 Drop '.' from @INC in various Perl scripts.
1189 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1191 PP/08 Reduce a number of compilation warnings under clang; building with
1192 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1193 should be warning-free.
1195 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1197 HS/01 Fix portability problems introduced by PP/08 for platforms where
1198 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1200 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1201 chunk. This allows us to accept broken chunked messages. We need a more
1202 general solution here.
1204 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1205 already-broken messages in the queue.
1207 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1209 JH/19 Fix reference counting bug in routing-generated-address tracking.
1215 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1216 supports it and a size is available (ie. the sending peer gave us one).
1218 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1219 years of being deprecated). The replacements are the ACLs
1220 acl_smtp_mime and acl_not_smtp_mime.
1222 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1223 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1224 or even an in-clear connection were permitted. Now, if the host lookup
1225 was dnssec and dane was requested then the host is only used if the
1226 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1227 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1228 if one fails this test.
1229 This means that a poorly-configured remote DNS will make it incommunicado;
1230 but it protects against a DNS-interception attack on it.
1232 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1233 non-noisy when a race steals the message being considered.
1235 JH/05 If main configuration option tls_certificate is unset, generate a
1236 self-signed certificate for inbound TLS connections.
1238 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1239 in rewrites and routers.
1241 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1242 and logged a warning sing 4.83; now they are a configuration file error.
1244 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1245 (lacking @domain). Apply the same qualification processing as RCPT.
1247 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1249 JH/10 Support ${sha256:} applied to a string (as well as the previous
1252 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1253 a cutthrough deliver is pending, as we always want to make a connection.
1254 This also avoids re-routing the message when later placing the cutthrough
1255 connection after a verify cache hit.
1256 Do not update it with the verify result either.
1258 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1259 when routing results in more than one destination address.
1261 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1262 signing (which inhibits the cutthrough capability). Previously only
1263 the presence of an option was tested; now an expansion evaluating as
1264 empty is permissible (obviously it should depend only on data available
1265 when the cutthrough connection is made).
1267 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1268 the relevant preceding SMTP command did not note the pipelining mode.
1270 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1271 Previously they were not counted.
1273 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1274 as one having no matching records. Previously we deferred the message
1275 that needed the lookup.
1277 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1278 distinguished as "(=".
1280 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1281 for missing MX records. Previously it only worked for missing A records.
1283 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1285 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1286 after the data-go-ahead and data-ack. Patch from Jason Betts.
1288 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1289 even for a "none" policy. Patch from Tony Meyer.
1291 JH/22 Fix continued use of a connection for further deliveries. If a port was
1292 specified by a router, it must also match for the delivery to be
1295 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1296 When one of the recipients of a message was unsuitable for the connection
1297 (has no matching addresses), we lost track of needing to mark it
1298 deferred. As a result mail would be lost.
1300 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1302 JH/25 Decoding ACL controls is now done using a binary search; the source code
1303 takes up less space and should be simpler to maintain. Merge the ACL
1304 condition decode tables also, with similar effect.
1306 JH/26 Fix problem with one_time used on a redirect router which returned the
1307 parent address unchanged. A retry would see the parent address marked as
1308 delivered, so not attempt the (identical) child. As a result mail would
1311 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1312 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1313 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1316 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1317 Main config options check_{log,spool}_{inodes,space} are now
1318 100 inodes, 10MB unless set otherwise in the configuration.
1320 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1321 Previously it only applied to the main-section connection policy
1324 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1326 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1327 by me. Added RFC7919 DH primes as an alternative.
1329 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1330 are not in the system include path.
1332 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1333 GnuTLS, when a session startup failed (eg because the client disconnected)
1334 Exim did stdio operations after fclose. This was exposed by a recent
1335 change which nulled out the file handle after the fclose.
1337 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1338 signed directly by the cert-signing cert, rather than an intermediate
1339 OCSP-signing cert. This is the model used by LetsEncrypt.
1341 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1343 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1344 an incoming connection.
1346 HS/02 Bug 1802: Do not half-close the connection after sending a request
1349 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1350 fallback to "prime256v1".
1352 JH/34 SECURITY: Use proper copy of DATA command in error message.
1353 Could leak key material. Remotely exploitable. CVE-2016-9963.
1359 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1360 and 3.4.4 - once the server is enabled to respond to an OCSP request
1361 it does even when not requested, resulting in a stapling non-aware
1362 client dropping the TLS connection.
1364 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1365 support variable-length bit vectors. No functional change.
1367 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1368 The I= interface field on outgoing lines is now after the H= remote
1369 host field, same as incoming lines. There is a separate
1370 outgoing_interface log selector which allows you to disable the
1373 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1374 If not running log_selector +smtp_connection the mainlog would be held
1375 open indefinitely after a "too many connections" event, including to a
1376 deleted file after a log rotate. Leave the per net connection logging
1377 leaving it open for efficiency as that will be quickly detected by the
1378 check on the next write.
1380 HS/01 Bug 1671: Fix post transport crash.
1381 Processing the wait-<transport> messages could crash the delivery
1382 process if the message IDs didn't exist for some reason. When
1383 using 'split_spool_directory=yes' the construction of the spool
1384 file name failed already, exposing the same netto behaviour.
1386 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1387 mime_regex ACL conditions.
1389 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1390 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1391 to HELO, local diagnostic string.
1393 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1394 log line to debug. Even when configured with a tls authenticator many
1395 client connections are expected to not authenticate in this way, so
1396 an authenticate fail is not an error.
1398 HS/02 Add the Exim version string to the process info. This way exiwhat
1399 gives some more detail about the running daemon.
1401 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1402 matter for fast-change records such as DNSBLs.
1404 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1405 retry record, even if constant. There may be multiple transports with
1406 different interface settings and the retry behaviour needs to be kept
1409 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1411 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1413 JH/10 Bug 840: fix log_defer_output option of pipe transport
1415 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1416 hosts_randomize. This matters a lot when combined with mua_wrapper.
1418 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1419 ${quote_pgsql:<string>} operator.
1421 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1423 JH/14 Change header file name for freeradius-client. Relevant if compiling
1424 with Radius support; from the Gentoo tree and checked under Fedora.
1426 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1428 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1429 option transport_filter, meaning no filtering.
1431 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1433 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1434 defaults to "*" (all hosts). The variable is now available when not built
1435 with TLS, default unset, mainly to enable keeping the testsuite sane.
1436 If a server certificate is not supplied (via tls_certificate) an error is
1437 logged, and clients will find TLS connections fail on startup. Presumably
1438 they will retry in-clear.
1439 Packagers of Exim are strongly encouraged to create a server certificate
1440 at installation time.
1442 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1443 with the $config_file variable.
1445 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1446 in transport context, after the attempt, and per-recipient. The latter type
1447 is per host attempted. The event data is the error message, and the errno
1448 information encodes the lookup type (A vs. MX) used for the (first) host,
1449 and the trailing two digits of the smtp 4xx response.
1451 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1452 to write to mainlog (or rejectlog, paniclog) in the window between file
1453 creation and permissions/ownership being changed. Particularly affects
1454 installations where exicyclog is run as root, rather than exim user;
1455 result is that the running daemon panics and dies.
1457 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1459 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1460 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1461 "pri" and "weight". Note that the previous implicit priority given by the
1462 list order is no longer honoured.
1464 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1465 for DKIM processing.
1467 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1468 by defining SUPPORT_SOCKS.
1470 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1471 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1472 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1473 variables are renamed to proxy_{local,external}_{address,port}.
1475 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1476 for a build by defining SUPPORT_I18N
1478 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1479 of the query string, and make ${quote_redis:} do that quoting.
1481 JH/29 Move Events support from Experimental to mainline, enabled by default
1482 and removable for a build by defining DISABLE_EVENT.
1484 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1486 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1487 cached by the daemon.
1489 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1490 by defining LOOKUP_REDIS. The libhiredis library is required.
1492 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1493 keys are given for lookup.
1495 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1496 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1497 only supported when built with TLS support. The PolarSSL SHA routines
1498 are still used when the TLS library is too old for convenient support.
1500 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1501 openssl_options), for security. OpenSSL forces this from version 1.1.0
1502 server-side so match that on older versions.
1504 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1505 allocation for $value could be released as the expansion processing
1506 concluded, but leaving the global pointer active for it.
1508 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1509 and to use the domains and local_parts ACL conditions.
1511 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1512 incorrectly not doubled on cutthrough transmission, hence seen as a
1513 body-termination at the receiving system - resulting in truncated mails.
1514 Commonly the sender saw a TCP-level error, and retransmitted the message
1515 via the normal store-and-forward channel. This could result in duplicates
1516 received - but deduplicating mailstores were liable to retain only the
1517 initial truncated version.
1519 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1521 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1523 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1524 we're in there, support oversigning also; bug 1309.
1526 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1528 HS/04 Add support for keep_environment and add_environment options.
1530 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1531 either intentional arithmetic overflow during PRNG, or testing config-
1534 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1535 delivery resulted in actual delivery. Cancel cutthrough before DATA
1538 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1539 rejects a recipient: pass the reject to the originator.
1541 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1542 Many were false-positives and ignorable, but it's worth fixing the
1545 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1546 for the new environment-manipulation done at startup. Move the routines
1547 from being local to tls.c to being global via the os.c file.
1549 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1550 an extract embedded as result-arg for a map, the first arg for extract
1551 is unavailable so we cannot tell if this is a numbered or keyed
1552 extraction. Accept either.
1558 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1561 JH/02 The smtp transport option "multi_domain" is now expanded.
1563 JH/03 The smtp transport now requests PRDR by default, if the server offers
1566 JH/04 Certificate name checking on server certificates, when exim is a client,
1567 is now done by default. The transport option tls_verify_cert_hostnames
1568 can be used to disable this per-host. The build option
1569 EXPERIMENTAL_CERTNAMES is withdrawn.
1571 JH/05 The value of the tls_verify_certificates smtp transport and main options
1572 default to the word "system" to access the system default CA bundle.
1573 For GnuTLS, only version 3.0.20 or later.
1575 JH/06 Verification of the server certificate for a TLS connection is now tried
1576 (but not required) by default. The verification status is now logged by
1577 default, for both outbound TLS and client-certificate supplying inbound
1580 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1583 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1584 Status Notification (bounce) messages are now MIME format per RFC 3464.
1585 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1586 under the control of the dsn_advertise_hosts option, and routers may
1587 have a dsn_lasthop option.
1589 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1590 default, modifiable by a malware= option. The list separator for
1591 the options can now be changed in the usual way. Bug 68.
1593 JH/10 The smtp_receive_timeout main option is now expanded before use.
1595 JH/11 The incoming_interface log option now also enables logging of the
1596 local interface on delivery outgoing connections.
1598 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1599 if the interface and destination host and port all match.
1601 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1604 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1605 Patch from Andrew Lewis.
1607 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1608 now supports optional time-restrictions, weighting, and priority
1609 modifiers per server. Patch originally by <rommer@active.by>.
1611 JH/16 The spamd_address main option now supports a mixed list of local
1612 and remote servers. Remote servers can be IPv6 addresses, and
1613 specify a port-range.
1615 JH/17 Bug 68: The spamd_address main option now supports an optional
1616 timeout value per server.
1618 JH/18 Bug 1581: Router and transport options headers_add/remove can
1619 now have the list separator specified.
1621 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1624 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1627 JH/21 Support for the A6 type of dns record is withdrawn.
1629 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1630 rather than the verbs used.
1632 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1633 from 255 to 1024 chars.
1635 JH/24 Verification callouts now attempt to use TLS by default.
1637 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1638 are generic router options now. The defaults didn't change.
1640 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1641 Original patch from Alexander Shikoff, worked over by JH.
1643 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1644 files if ZCAT_COMMAND is not executable.
1646 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1648 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1650 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1651 Normally benign, it bites when the pair was led to by a CNAME;
1652 modern usage is to not canonicalize the domain to a CNAME target
1653 (and we were inconsistent anyway for A-only vs AAAA+A).
1655 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1657 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1658 when evaluating $sender_host_dnssec.
1660 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1661 $sender_helo_dnssec variable.
1663 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1665 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1667 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1669 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1670 documented as working, but never had. Support all but $spam_report.
1672 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1673 added for tls authenticator.
1675 HS/03 Add perl_taintmode main config option
1681 TL/01 When running the test suite, the README says that variables such as
1682 no_msglog_check are global and can be placed anywhere in a specific
1683 test's script, however it was observed that placement needed to be near
1684 the beginning for it to behave that way. Changed the runtest perl
1685 script to read through the entire script once to detect and set these
1686 variables, reset to the beginning of the script, and then run through
1687 the script parsing/test process like normal.
1689 TL/02 The BSD's have an arc4random API. One of the functions to induce
1690 adding randomness was arc4random_stir(), but it has been removed in
1691 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1692 function when detected.
1694 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1695 cause callback expansion.
1697 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1698 syntax errors in an expansion can be treated as a string instead of
1699 logging or causing an error, due to the internal use of bool_lax
1700 instead of bool when processing it.
1702 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1703 server certificates when making smtp deliveries.
1705 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1707 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1709 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1711 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1712 Merged patch from Sebastian Wiedenroth.
1714 JH/05 Fix results-pipe from transport process. Several recipients, combined
1715 with certificate use, exposed issues where response data items split
1716 over buffer boundaries were not parsed properly. This eventually
1717 resulted in duplicates being sent. This issue only became common enough
1718 to notice due to the introduction of connection certificate information,
1719 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1721 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1722 size buffer was used, resulting in syntax errors when an expansion
1725 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1726 version 3.3.6 or later.
1728 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1729 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1730 both become "event_action", the variables become $event_name, $event_data
1731 and $event_defer_errno. There is a new variable $verify_mode, usable in
1732 routers, transports and related events. The tls:cert event is now also
1733 raised for inbound connections, if the main configuration event_action
1736 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1737 early OCSP support, but no stapling (appears to be less than 1.0.0).
1739 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1740 server certificate names available under the smtp transport option
1741 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1744 JH/10 Time-related extraction expansions from certificates now use the main
1745 option "timezone" setting for output formatting, and are consistent
1746 between OpenSSL and GnuTLS compilations. Bug 1541.
1748 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1749 encoded parameter in the incoming message. Bug 1558.
1751 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1752 include certificate info, eximon was claiming there were spoolfile
1755 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1757 JH/14 Log delivery-related information more consistently, using the sequence
1758 "H=<name> [<ip>]" wherever possible.
1760 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1761 are problematic for Debian distribution, omit them from the release
1764 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1766 JH/16 Fix string representation of time values on 64bit time_t architectures.
1769 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1770 output list separator was used.
1775 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1776 checkers that were complaining about end of non-void function with no
1779 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1780 This was a regression introduced in 4.83 by another bugfix.
1782 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1784 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1785 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1791 TF/01 Correctly close the server side of TLS when forking for delivery.
1793 When a message was received over SMTP with TLS, Exim failed to clear up
1794 the incoming connection properly after forking off the child process to
1795 deliver the message. In some situations the subsequent outgoing
1796 delivery connection happened to have the same fd number as the incoming
1797 connection previously had. Exim would try to use TLS and fail, logging
1798 a "Bad file descriptor" error.
1800 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1801 utilities have not been installed.
1803 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1804 temporary space as the ACL may create new global variables.
1806 TL/01 LDAP support uses per connection or global context settings, depending
1807 upon the detected version of the libraries at build time.
1809 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1810 to extract and use the src ip:port in logging and expansions as if it
1811 were a direct connection from the outside internet. PPv2 support was
1812 updated based on HAProxy spec change in May 2014.
1814 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1816 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1817 Properly escape header and check for NULL return.
1819 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1822 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1824 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1825 characters in header names, implemented as a verify condition.
1826 Contributed by Michael Fischer v. Mollard.
1828 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1829 results permerror and temperror. Previous values are deprecated but
1830 still accepted. In a future release, err_perm and err_temp will be
1831 completely removed, which will be a backward incompatibility if the
1832 ACL tests for either of these two old results. Patch contributed by
1833 user bes-internal on the mailing list.
1835 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1837 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1838 selectors, in both main and reject logs.
1840 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1843 JH/07 Add malware type "sock" for talking to simple daemon.
1845 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1847 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1848 routers/transports under cutthrough routing.
1850 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1851 numbers. Touch up "bool" conditional to keep the same definition.
1853 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1855 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1857 JH/12 Expand items in router/transport headers_add or headers_remove lists
1858 individually rather than the list as a whole. Bug 1452.
1860 Required for reasonable handling of multiple headers_ options when
1861 they may be empty; requires that headers_remove items with embedded
1862 colons must have them doubled (or the list-separator changed).
1864 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1865 view the policy declared in the DMARC record. Currently, $dmarc_status
1866 is a combined value of both the record presence and the result of the
1869 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1871 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1872 dnslookup router and the smtp transport (applying to the forward
1875 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1876 of ldap servers used for a specific lookup. Patch provided by Heiko
1879 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1880 New variable $lookup_dnssec_authenticated for observability.
1882 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1883 Patch submitted by Lars Timman.
1885 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1887 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1888 Requires trusted mode and valid format message id, aborts otherwise.
1889 Patch contributed by Heiko Schlichting.
1891 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1892 certextract with support for various fields. Bug 1358.
1894 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1895 is requested by default, modifiable by smtp transport option
1898 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1899 operate on certificate variables to give certificate fingerprints
1900 Also new ${sha256:cert_variable}.
1902 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1904 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1905 Christian Aistleitner.
1907 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1909 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1910 file. Patch from Wolfgang Breyha.
1912 JH/25 Expand the coverage of the delivery $host and $host_address to
1913 client authenticators run in verify callout. Bug 1476.
1915 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1916 align with daemon_smtp_ports. Bug 72.
1918 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1919 support and error reporting did not work properly.
1921 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1922 and is readable. Patch from Andrew Colin Kissa.
1924 TL/14 Enhance documentation of ${run expansion and how it parses the
1925 commandline after expansion, particularly in the case when an
1926 unquoted variable expansion results in an empty value.
1928 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1930 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1931 by renaming away from it. Addresses GH issue 15, reported by
1934 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1936 TL/15 SECURITY: prevent double expansion in math comparison functions
1937 (can expand unsanitized data). Not remotely exploitable.
1944 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1946 PP/02 Make -n do something, by making it not do something.
1947 When combined with -bP, the name of an option is not output.
1949 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1952 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1953 $sender_host_name and config options to manage this, and basic check
1956 PP/05 DSCP support for outbound connections and control modifier for inbound.
1958 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1959 (Only plugin which currently uses this is kerberos4, which nobody should
1960 be using, but we should make it available and other future plugins might
1961 conceivably use it, even though it would break NAT; stuff *should* be
1962 using channel bindings instead).
1964 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1965 name; added for Sendmail compatibility; requires admin caller.
1966 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1967 just ignore it); requires trusted caller.
1968 Also parse but ignore: -Ac -Am -X<logfile>
1971 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1973 TL/02 Add +smtp_confirmation as a default logging option.
1975 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1976 Patch by Magnus Holmgren from 2007-02-20.
1978 TL/04 Bugzilla 1281 - Spec typo.
1979 Bugzilla 1283 - Spec typo.
1980 Bugzilla 1290 - Spec grammar fixes.
1982 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1984 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1986 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1987 mailing list by by Dmitry Isaikin.
1989 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1991 JH/02 Support "G" suffix to numbers in ${if comparisons.
1993 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1995 NM/01 Bugzilla 1197 - Spec typo
1996 Bugzilla 1196 - Spec examples corrections
1998 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2000 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2001 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2004 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2005 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2007 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2008 "acl {{name}{arg}...}", and optional args on acl condition
2011 JH/05 Permit multiple router/transport headers_add/remove lines.
2013 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2015 JH/07 Avoid using a waiting database for a single-message-only transport.
2016 Performance patch from Paul Fisher. Bugzilla 1262.
2018 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2021 JH/09 Add $headers_added variable, with content from use of ACL modifier
2022 add_header (but not yet added to the message). Bugzilla 199.
2024 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2025 Pulled from Bugzilla 817 by Wolfgang Breyha.
2027 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2029 (nb: this is the same fix as in Exim 4.80.1)
2031 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2034 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2037 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2039 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2040 advertise SMTP AUTH mechanism to us, instead of a generic
2041 protocol violation error. Also, make Exim more robust to bad
2042 data from the Dovecot auth socket.
2044 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2046 When a queue runner is handling a message, Exim first routes the
2047 recipient addresses, during which it prunes them based on the retry
2048 hints database. After that it attempts to deliver the message to
2049 any remaining recipients. It then updates the hints database using
2052 So if a recipient address works intermittently, it can get repeatedly
2053 deferred at routing time. The retry hints record remains fresh so the
2054 address never reaches the final cutoff time.
2056 This is a fairly common occurrence when a user is bumping up against
2057 their storage quota. Exim had some logic in its local delivery code
2058 to deal with this. However it did not apply to per-recipient defers
2059 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2061 This change adds a proper retry rule check during routing so that the
2062 final cutoff time is checked against the message's age. We only do
2063 this check if there is an address retry record and there is not a
2064 domain retry record; this implies that previous attempts to handle
2065 the address had the retry_use_local_parts option turned on. We use
2066 this as an approximation for the destination being like a local
2067 delivery, as in LMTP.
2069 I suspect this new check makes the old local delivery cutoff check
2070 redundant, but I have not verified this so I left the code in place.
2072 TF/02 Correct gecos expansion when From: is a prefix of the username.
2074 Test 0254 submits a message to Exim with the header
2078 When I ran the test suite under the user fanf2, Exim expanded
2079 the header to contain my full name, whereas it should have added
2080 a Resent-Sender: header. It erroneously treats any prefix of the
2081 username as equal to the username.
2083 This change corrects that bug.
2085 GF/01 DCC debug and logging tidyup
2086 Error conditions log to paniclog rather than rejectlog.
2087 Debug lines prefixed by "DCC: " to remove any ambiguity.
2089 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2091 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2092 Bug spotted by Jeremy Harris; was flawed since initial commit.
2093 Would have resulted in OCSP responses post-SNI triggering an Exim
2094 NULL dereference and crash.
2096 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2098 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2099 Bug detection, analysis and fix by Samuel Thibault.
2100 Bugzilla 1331, Debian bug #698092.
2102 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2104 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2105 Server implementation by Todd Lyons, client by JH.
2106 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2107 config variable "prdr_enable" controls whether the server
2108 advertises the facility. If the client requests PRDR a new
2109 acl_data_smtp_prdr ACL is called once for each recipient, after
2110 the body content is received and before the acl_smtp_data ACL.
2111 The client is controlled by both of: a hosts_try_prdr option
2112 on the smtp transport, and the server advertisement.
2113 Default client logging of deliveries and rejections involving
2114 PRDR are flagged with the string "PRDR".
2116 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2117 fclose(). Diagnosis by Todd Lyons.
2119 PP/17 Update configure.default to handle IPv6 localhost better.
2120 Patch by Alain Williams (plus minor tweaks).
2123 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2124 This is now consistent with GnuTLS, and is now documented: the
2125 previous undocumented portable approach to treating the option as
2126 unset was to force an expansion failure. That still works, and
2127 an empty string is now equivalent.
2129 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2130 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2131 not performing validation itself.
2133 PP/20 Added force_command boolean option to pipe transport.
2134 Patch from Nick Koston, of cPanel Inc.
2136 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2139 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2141 PP/21 Fix eximon continuous updating with timestamped log-files.
2142 Broken in a format-string cleanup in 4.80, missed when I repaired the
2143 other false fix of the same issue.
2144 Report and fix from Heiko Schlichting.
2147 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2148 Report from Prashanth Katuri.
2150 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2151 It's SecureTransport, so affects any MacOS clients which use the
2152 system-integrated TLS libraries, including email clients.
2154 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2155 using a MIME ACL for non-SMTP local injection.
2156 Report and assistance in diagnosis by Warren Baker.
2158 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2160 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2162 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2163 last id that failed so it may be referenced in subsequent ACL's.
2165 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2168 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2169 ldap library initialization, allowing self-signed CA's to be
2170 used. Also properly sets require_cert option later in code by
2171 using NULL (global ldap config) instead of ldap handle (per
2172 session). Bug diagnosis and testing by alxgomz.
2174 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2175 the src/util/ subdirectory.
2177 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2178 renamed to Transport Post Delivery Action by Jeremy Harris, as
2181 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2182 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2183 redis_servers = needs to be configured which will be used by the redis
2184 lookup. Patch from Warren Baker, of The Packet Hub.
2186 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2188 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2189 hostname or reverse DNS when processing a host list. Used suggestions
2190 from multiple comments on this bug.
2192 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2194 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2195 Missed a few lines, added it to make the runtest require no keyboard
2198 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2199 contains upper case chars. Make router use caseful_local_part.
2201 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2202 support when GnuTLS has been built with p11-kit.
2208 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2210 This, or similar/improved, will also be change PP/11 of 4.82.
2216 PP/01 Handle short writes when writing local log-files.
2217 In practice, only affects FreeBSD (8 onwards).
2218 Bugzilla 1053, with thanks to Dmitry Isaikin.
2220 NM/01 Bugzilla 949 - Documentation tweak
2222 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2225 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2227 PP/02 Implemented gsasl authenticator.
2229 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2231 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2232 `pkg-config foo` for cflags/libs.
2234 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2235 with rest of GSASL and with heimdal_gssapi.
2237 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2238 `pkg-config foo` for cflags/libs for the TLS implementation.
2240 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2241 properties get this fed in as external SSF. A number of robustness
2242 and debugging improvements to the cyrus_sasl authenticator.
2244 PP/08 cyrus_sasl server now expands the server_realm option.
2246 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2247 Patch by Jeremy Harris.
2249 PP/10 Added dbmjz lookup type.
2251 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2253 PP/12 MAIL args handles TAB as well as SP, for better interop with
2254 non-compliant senders.
2255 Analysis and variant patch by Todd Lyons.
2257 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2258 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2259 Patch from Dirk Mueller <dmueller@suse.com>
2261 PP/13 tls_peerdn now print-escaped for spool files.
2262 Observed some $tls_peerdn in wild which contained \n, which resulted
2263 in spool file corruption.
2265 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2266 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2267 or write after TLS renegotiation, which otherwise led to messages
2270 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2271 as a tracking header (ie: a signed header comes before the signature).
2272 Patch from Wolfgang Breyha.
2274 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2275 comma-sep list; embedded commas doubled.
2277 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2279 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2281 Report and patch from Dmitry Banschikov.
2283 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2284 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2285 failures. We appear to now support TLS1.1+ with Exim.
2287 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2288 lets Exim select keys and certificates based upon TLS SNI from client.
2289 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2290 before an outbound SMTP session. New log_selector, +tls_sni.
2292 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2293 NULL dereference. Report and patch from Alun Jones.
2295 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2296 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2297 Not seeing resolver debug output on NetBSD, but suspect this is a
2298 resolver implementation change.
2300 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2301 Left warnings. Added "eximon gdb" invocation mode.
2303 PP/21 Defaulting "accept_8bitmime" to true, not false.
2305 PP/22 Added -bw for inetd wait mode support.
2307 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2308 locate the relevant includes and libraries. Made this the default.
2310 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2311 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2313 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2314 This may cause build issues on older platforms.
2316 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2317 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2318 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2319 Added SNI support via GnuTLS too.
2320 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2322 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2324 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2325 Applied second patch from Janne, implementing suggestion to default
2326 multiple-strings-in-record handling to match SPF spec.
2328 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2330 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2331 read-only, out of scope).
2332 Patch from Wolfgang Breyha, report from Stuart Northfield.
2334 PP/29 Fix three issues highlighted by clang analyser static analysis.
2335 Only crash-plausible issue would require the Cambridge-specific
2336 iplookup router and a misconfiguration.
2337 Report from Marcin Mirosław.
2339 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2341 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2342 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2343 As part of this, removing so much warning spew let me fix some minor
2344 real issues in debug logging.
2346 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2347 assignment on my part. Fixed.
2349 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2350 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2351 Janne Snabb (who went above and beyond: thank you).
2353 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2354 string otherwise requires a connection and a bunch more work and it's
2355 relatively easy to get wrong. Should also expose TLS library linkage
2358 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2359 64-bit ${eval} (JH/03).
2361 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2362 GNU libc to support some of the 64-bit stuff, should not lead to
2363 conflicts. Defined before os.h is pulled in, so if a given platform
2364 needs to override this, it can.
2366 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2367 protection layer was required, which is not implemented.
2368 Bugzilla 1254, patch from Wolfgang Breyha.
2370 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2371 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2372 tls_dhparam take prime identifiers. Also unbreak combination of
2373 OpenSSL+DH_params+TLSSNI.
2375 PP/39 Disable SSLv2 by default in OpenSSL support.
2381 PP/01 Solaris build fix for Oracle's LDAP libraries.
2382 Bugzilla 1109, patch from Stephen Usher.
2384 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2386 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2389 TF/02 Fix a couple more cases where we did not log the error message
2390 when unlink() failed. See also change 4.74-TF/03.
2392 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2393 lock up or crash if it happened to be inside a call to libc when it
2394 got a SIGUSR1 from exiwhat.
2396 The SIGUSR1 handler appends the current process status to the process
2397 log which is later printed by exiwhat. It used to use the general
2398 purpose logging code to do this, but several functions it calls are
2399 not safe for signals.
2401 The new output code in the SIGUSR1 handler is specific to the process
2402 log, and simple enough that it's easy to inspect for signal safety.
2403 Removing some special cases also simplifies the general logging code.
2404 Removing the spurious timestamps from the process log simplifies
2407 TF/04 Improved ratelimit ACL condition.
2409 The /noupdate option has been deprecated in favour of /readonly which
2410 has clearer semantics. The /leaky, /strict, and /readonly update modes
2411 are mutually exclusive. The update mode is no longer included in the
2412 database key; it just determines when the database is updated. (This
2413 means that when you upgrade Exim will forget old rate measurements.)
2415 Exim now checks that the per_* options are used with an update mode that
2416 makes sense for the current ACL. For example, when Exim is processing a
2417 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2418 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2419 must specify per_mail/readonly. If you omit the update mode it defaults to
2420 /leaky where that makes sense (as before) or /readonly where required.
2422 The /noupdate option is now undocumented but still supported for
2423 backwards compatibility. It is equivalent to /readonly except that in
2424 ACLs where /readonly is required you may specify /leaky/noupdate or
2425 /strict/noupdate which are treated the same as /readonly.
2427 A useful new feature is the /count= option. This is a generalization
2428 of the per_byte option, so that you can measure the throughput of other
2429 aggregate values. For example, the per_byte option is now equivalent
2430 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2432 The per_rcpt option has been generalized using the /count= mechanism
2433 (though it's more complicated than the per_byte equivalence). When it is
2434 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2435 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2436 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2437 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2438 Note that using per_rcpt with a non-readonly update mode in more than
2439 one ACL will cause the recipients to be double-counted. (The per_mail
2440 and per_byte options don't have this problem.)
2442 The handling of very low rates has changed slightly. If the computed rate
2443 is less than the event's count (usually one) then this event is the first
2444 after a long gap. In this case the rate is set to the same as this event's
2445 count, so that the first message of a spam run is counted properly.
2447 The major new feature is a mechanism for counting the rate of unique
2448 events. The new per_addr option counts the number of different
2449 recipients that someone has sent messages to in the last time period. It
2450 behaves like per_rcpt if all the recipient addresses are different, but
2451 duplicate recipient addresses do not increase the measured rate. Like
2452 the /count= option this is a general mechanism, so the per_addr option
2453 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2454 example, measure the rate that a client uses different sender addresses
2455 with the options per_mail/unique=$sender_address. There are further
2456 details in the main documentation.
2458 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2460 TF/06 Removed a few PCRE remnants.
2462 TF/07 Automatically extract Exim's version number from tags in the git
2463 repository when doing development or release builds.
2465 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2466 Bugzilla 879. Patch from Paul Fisher.
2468 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2469 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2472 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2474 PP/05 Variable $av_failed, true if the AV scanner deferred.
2475 Bugzilla 1078. Patch from John Horne.
2477 PP/06 Stop make process more reliably on build failure.
2478 Bugzilla 1087. Patch from Heiko Schlittermann.
2480 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2481 Bugzilla 1089. Patch from Heiko Schlittermann.
2483 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2484 Bugzilla 1131. Patch from Holger Weiß.
2486 PP/09 Handle IPv6 addresses with SPF.
2487 Bugzilla 860. Patch from Wolfgang Breyha.
2489 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2491 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2494 PP/11 match_* no longer expand right-hand-side by default.
2495 New compile-time build option, EXPAND_LISTMATCH_RHS.
2496 New expansion conditions, "inlist", "inlisti".
2498 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2500 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2502 PP/14 fix log_write() format string regression from TF/03.
2503 Bugzilla 1152. Patch from Dmitry Isaikin.
2509 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2511 PP/02 Harmonised TLS library version reporting; only show if debugging.
2512 Layout now matches that introduced for other libraries in 4.74 PP/03.
2514 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2516 PP/04 New "dns_use_edns0" global option.
2518 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2521 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2522 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2524 TK/01 Updated PolarSSL code to 0.14.2.
2525 Bugzilla 1097. Patch from Andreas Metzler.
2527 PP/07 Catch divide-by-zero in ${eval:...}.
2528 Fixes bugzilla 1102.
2530 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2533 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2534 format-string attack -- SECURITY: remote arbitrary code execution.
2536 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2537 time unintentionally subject to list matching rules, letting the header
2538 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2539 arbitrary string expansion). This allowed for information disclosure.
2541 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2542 INT_MIN/-1 -- value coerced to INT_MAX.
2548 NM/01 Workaround for PCRE version dependency in version reporting
2551 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2552 This fixes portability to compilers other than gcc, notably
2553 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2555 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2556 makefiles for portability to HP-UX and POSIX correctness.
2558 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2559 Also via indented variable definition in the Makefile.
2560 (Debugging by Oliver Heesakkers).
2562 PP/02 Restore caching of spamd results with expanded spamd_address.
2563 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2565 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2566 Improves build reliability. Fix from: Frank Elsner
2568 NM/02 Fix wide character breakage in the rfc2047 coding
2569 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2571 NM/03 Allow underscore in dnslist lookups
2572 Fixes bug 1026. Patch from Graeme Fowler
2574 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2575 Code patches from Adam Ciarcinski of NetBSD.
2577 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2580 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2581 is logged, to avoid truncation. Patch from John Horne.
2583 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2584 Patch from Jakob Hirsch.
2586 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2587 SQL string expansion failure details.
2588 Patch from Andrey Oktyabrski.
2590 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2591 Patch from Simon Arlott.
2593 PP/09 New lookups functionality failed to compile on old gcc which rejects
2594 extern declarations in function scope.
2595 Patch from Oliver Fleischmann
2597 PP/10 Use sig_atomic_t for flags set from signal handlers.
2598 Check getgroups() return and improve debugging.
2599 Fixed developed for diagnosis in bug 927 (which turned out to be
2602 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2603 Patch from Mark Zealey.
2605 PP/12 Bugzilla 1056: Improved spamd server selection.
2606 Patch from Mark Zealey.
2608 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2609 Based on patch from Heiko Schlittermann.
2611 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2612 Patch from Uwe Doering, sign-off by Michael Haardt.
2614 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2615 variable declaration deep within a block. Bug and patch from
2618 PP/15 lookups-Makefile IRIX compatibility coercion.
2620 PP/16 Make DISABLE_DKIM build knob functional.
2622 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2623 Patch by Simon Arlott
2625 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2626 variable argument macros. Our copy now differs from upstream.
2632 TF/01 Failure to get a lock on a hints database can have serious
2633 consequences so log it to the panic log.
2635 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2636 controlled using the smtp_confirmation log selector.
2638 TF/03 Include the error message when we fail to unlink a spool file.
2640 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2641 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2642 for maintaining out-of-tree patches for some time.
2644 PP/01 Bugzilla 139: Documentation and portability issues.
2645 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2646 Handle per-OS dynamic-module compilation flags.
2648 PP/02 Let /dev/null have normal permissions.
2649 The 4.73 fixes were a little too stringent and complained about the
2650 permissions on /dev/null. Exempt it from some checks.
2651 Reported by Andreas M. Kirchwitz.
2653 PP/03 Report version information for many libraries, including
2654 Exim version information for dynamically loaded libraries. Created
2655 version.h, now support a version extension string for distributors
2656 who patch heavily. Dynamic module ABI change.
2658 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2659 privilege escalation vulnerability whereby the Exim run-time user
2660 can cause root to append content of the attacker's choosing to
2663 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2666 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2667 If dropping privileges for untrusted macros, we disabled normal logging
2668 on the basis that it would fail; for the Exim run-time user, this is not
2669 the case, and it resulted in successful deliveries going unlogged.
2670 Fixed. Reported by Andreas Metzler.
2676 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2677 only prepend for the Resent-* case. Fixes regression introduced in
2678 Exim 4.70 by NM/22 for Bugzilla 607.
2680 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2681 increasing numbers of administrators be bitten by this.
2683 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2685 PP/03 Bugzilla 994: added openssl_options main configuration option.
2687 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2689 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2691 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2693 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2694 without a peer certificate, leading to a segfault because of an
2695 assumption that peers always have certificates. Be a little more
2696 paranoid. Problem reported by Martin Tscholak.
2698 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2699 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2700 NB: ClamAV planning to remove STREAM in "middle of 2010".
2701 CL also introduces -bmalware, various -d+acl logging additions and
2702 more caution in buffer sizes.
2704 PP/09 Implemented reverse_ip expansion operator.
2706 PP/10 Bugzilla 937: provide a "debug" ACL control.
2708 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2710 PP/12 Bugzilla 973: Implement --version.
2712 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2714 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2716 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2718 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2719 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2720 ignore trailing whitespace.
2722 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2724 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2727 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2728 Notification from Dr Andrew Aitchison.
2730 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2731 ExtendedDetectionInfo response format.
2732 Notification from John Horne.
2734 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2737 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2738 XSL and documented dependency on system catalogs, with examples of how
2741 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2744 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2745 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2746 configuration file which is writeable by the Exim user or group.
2748 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2749 of configuration files to cover files specified with the -C option if
2750 they are going to be used with root privileges, not just the default
2753 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2754 option (effectively making it always true).
2756 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2757 files to be used while preserving root privileges.
2759 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2760 that rogue child processes cannot use them.
2762 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2763 run-time user, instead of root.
2765 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2766 Exim run-time user without dropping privileges.
2768 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2769 result string, instead of calling string_vformat() twice with the same
2772 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2773 for other users. Others should always drop root privileges if they use
2774 -C on the command line, even for a whitelisted configure file.
2776 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2778 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2784 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2785 $data_path, and $header_path variables; fixed documentation bugs and
2788 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2789 exipick to access non-standard spools, including the "frozen" queue
2792 NM/01 Bugzilla 965: Support mysql stored procedures.
2793 Patch from Alain Williams
2795 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2797 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2798 Patch from Andreas Metzler
2800 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2801 Patch from Kirill Miazine
2803 NM/05 Bugzilla 671: Added umask to procmail example.
2805 JJ/03 installed exipick 20100323.0, fixing doc bug
2807 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2808 directory. Notification and patch from Dan Rosenberg.
2810 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2812 TK/02 Improve log output when DKIM signing operation fails.
2814 MH/01 Treat the transport option dkim_domain as a colon separated
2815 list, not as a single string, and sign the message with each element,
2816 omitting multiple occurences of the same signer.
2818 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2819 Bugzilla 985, 986. Patch by Simon Arlott
2821 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2822 Patch by Simon Arlott
2824 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2825 MBX locking. Notification from Dan Rosenberg.
2831 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2833 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2835 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2837 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2839 NM/04 Bugzilla 915: Flag broken perl installation during build.
2845 TK/01 Added patch by Johannes Berg that expands the main option
2846 "spamd_address" if it starts with a dollar sign.
2848 TK/02 Write list of recipients to X-Envelope-Sender header when building
2849 the mbox-format spool file for content scanning (suggested by Jakob
2852 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2853 (http://www.dcc-servers.net/) support via dccifd. Activated by
2854 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2856 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2857 by Mark Daniel Reidel <mr@df.eu>.
2859 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2860 When building exim an external PCRE library is now needed -
2861 PCRE is a system library on the majority of modern systems.
2862 See entry on PCRE_LIBS in EDITME file.
2864 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2865 conversation. Added nologin parameter to request.
2866 Patch contributed by Kirill Miazine.
2868 TF/01 Do not log submission mode rewrites if they do not change the address.
2870 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2872 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2873 log files in place. Contributed by Roberto Lima.
2875 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2877 TF/03 Bugzilla 615: When checking the local_parts router precondition
2878 after a local_part_suffix or local_part_prefix option, Exim now
2879 does not use the address's named list lookup cache, since this
2880 contains cached lookups for the whole local part.
2882 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2883 Robert Millan. Documentation is in experimental-spec.txt.
2885 TF/04 Bugzilla 668: Fix parallel build (make -j).
2887 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2889 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2890 Patch provided by Jan Srzednicki.
2892 TF/05 Leading white space used to be stripped from $spam_report which
2893 wrecked the formatting. Now it is preserved.
2895 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2896 that they are available at delivery time.
2898 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2900 TF/08 TLS error reporting now respects the incoming_interface and
2901 incoming_port log selectors.
2903 TF/09 Produce a more useful error message if an SMTP transport's hosts
2904 setting expands to an empty string.
2906 NM/06 Bugzilla 744: EXPN did not work under TLS.
2907 Patch provided by Phil Pennock.
2909 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2910 Patch provided by Richard Godbee.
2912 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2913 acl_smtp_notquit, added index entry.
2915 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2916 Patch provided by Eugene Bujak.
2918 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2919 accept(). Patch provided by Maxim Dounin.
2921 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2922 Patch provided by Phil Pennock.
2924 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2926 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2927 Patch provided by Brad "anomie" Jorsch.
2929 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2930 Patch provided by Dean Brooks.
2932 TK/05 Add native DKIM support (does not depend on external libraries).
2934 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2935 Patch provided by Graeme Fowler.
2937 NM/16 Bugzilla 851: Documentation example syntax fix.
2939 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2941 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2944 NM/19 Bugzilla 745: TLS version reporting.
2945 Patch provided by Phil Pennock.
2947 NM/20 Bugzilla 167: bool: condition support.
2948 Patch provided by Phil Pennock.
2950 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2951 clients. Patch provided by Phil Pennock.
2953 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2954 Patch provided by Brad "anomie" Jorsch.
2956 NM/23 Bugzilla 687: Fix misparses in eximstats.
2957 Patch provided by Heiko Schlittermann.
2959 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2960 Patch provided by Heiko Schlittermann.
2962 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2963 plus update to original patch.
2965 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2967 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2968 Patch provided by David Brownlee.
2970 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2972 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2974 NM/30 Bugzilla 888: TLS documentation bugfixes.
2976 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2978 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2979 Unlike the original bugzilla I have changed all shell scripts in src tree.
2981 NM/33 Bugzilla 898: Transport filter timeout fix.
2982 Patch by Todd Rinaldo.
2984 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2985 Patch by Serge Demonchaux.
2987 NM/35 Bugzilla 39: Base64 decode bug fixes.
2988 Patch by Jakob Hirsch.
2990 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2992 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2994 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2996 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3002 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3003 ALT-N's libdkim that I have put here:
3004 http://duncanthrax.net/exim-experimental/
3006 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3007 were called 'true' and it seems that C99 defines that as a reserved
3008 keyword to be used with 'bool' variable types. That means you could
3009 not include C99-style headers which use bools without triggering
3010 build errors in sieve.c.
3012 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3013 as mailq or other aliases. Changed the --help handling significantly
3014 to do whats expected. exim_usage() emits usage/help information.
3016 SC/01 Added the -bylocaldomain option to eximstats.
3018 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3020 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3022 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3028 PH/01 Another patch from the Sieve maintainer.
3030 PH/02 When an IPv6 address is converted to a string for single-key lookup
3031 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3032 dots are used instead of colons so that keys in lsearch files need not
3033 contain colons. This was done some time before quoting was made available
3034 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3035 (notated using the quote facility) so as to distinguish them from IPv4
3036 keys. This meant that lookups for IP addresses in host lists did not work
3037 for iplsearch lookups.
3039 This has been fixed by arranging for IPv6 addresses to be expressed with
3040 colons if the lookup type is iplsearch. This is not incompatible, because
3041 previously such lookups could never work.
3043 The situation is now rather anomalous, since one *can* have colons in
3044 ordinary lsearch keys. However, making the change in all cases is
3045 incompatible and would probably break a number of configurations.
3047 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3050 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3051 conversion specification without a maximum field width, thereby enabling
3052 a rogue spamd server to cause a buffer overflow. While nobody in their
3053 right mind would setup Exim to query an untrusted spamd server, an
3054 attacker that gains access to a server running spamd could potentially
3055 exploit this vulnerability to run arbitrary code as the Exim user.
3057 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3058 $primary_hostname instead of what libspf2 thinks the hosts name is.
3060 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3061 a directory entry by the name of the lookup key. Previously, if a
3062 symlink pointed to a non-existing file or a file in a directory that
3063 Exim lacked permissions to read, a lookup for a key matching that
3064 symlink would fail. Now it is enough that a matching directory entry
3065 exists, symlink or not. (Bugzilla 503.)
3067 PH/03 The body_linecount and body_zerocount variables are now exported in the
3070 PH/04 Added the $dnslist_matched variable.
3072 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3073 This means they are set thereafter only if the connection becomes
3076 PH/06 Added the client_condition to authenticators so that some can be skipped
3077 by clients under certain conditions.
3079 PH/07 The error message for a badly-placed control=no_multiline_responses left
3080 "_responses" off the end of the name.
3082 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3084 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3085 (without spaces) instead of just copying the configuration text.
3087 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3089 PH/11 Added $max_received_linelength.
3091 PH/12 Added +ignore_defer and +include_defer to host lists.
3093 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3094 way in which PCRE > 7.0 is built.
3096 PH/14 Implemented queue_only_load_latch.
3098 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3099 MAIL command. The effect was to mangle the value on 64-bit systems.
3101 PH/16 Another patch from the Sieve maintainer.
3103 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3105 PH/18 If a system quota error occurred while trying to create the file for
3106 a maildir delivery, the message "Mailbox is full" was not appended to the
3107 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3108 only to a quota excession during the actual writing of the file.
3110 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3111 characters?) which causes problems in log lines. The DN values are now
3112 passed through string_printing() before being added to log lines.
3114 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3115 and InterBase are left for another time.)
3117 PH/21 Added message_body_newlines option.
3119 PH/22 Guard against possible overflow in moan_check_errorcopy().
3121 PH/23 POSIX allows open() to be a macro; guard against that.
3123 PH/24 If the recipient of an error message contained an @ in the local part
3124 (suitably quoted, of course), incorrect values were put in $domain and
3125 $local_part during the evaluation of errors_copy.
3131 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3132 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3135 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3136 issue a MAIL command.
3138 PH/02 In an ACL statement such as
3140 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3142 if a client was not listed at all, or was listed with a value other than
3143 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3144 the condition was not true (as it should be), so access was not denied.
3145 The bug was that the ! inversion was incorrectly passed on to the second
3146 item. This has been fixed.
3148 PH/03 Added additional dnslists conditions == and =& which are different from
3149 = and & when the dns lookup returns more than one IP address.
3151 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3152 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3154 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3155 FSYNC, which compiles an option called disable_fsync that allows for
3156 bypassing fsync(). The documentation is heavily laced with warnings.
3158 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3160 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3161 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3162 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3163 including adding "make clean"; (3) Added -fPIC when compiling the test
3164 dynamically loaded module, to get rid of a warning.
3166 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3167 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3168 = 0s. The bug is otherwise harmless.
3170 PH/07 There was a bug in the dovecot authenticator such that the value of
3171 $auth1 could be overwritten, and so not correctly preserved, after a
3172 successful authentication. This usually meant that the value preserved by
3173 the server_setid option was incorrect.
3175 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3177 PH/09 Installed PCRE release 7.0.
3179 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3180 run for batched SMTP input. It is now run at the start of every message
3181 in the batch. While fixing this I discovered that the process information
3182 (output by running exiwhat) was not always getting set for -bs and -bS
3183 input. This is fixed, and it now also says "batched" for BSMTP.
3185 PH/11 Added control=no_pipelining.
3187 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3188 patch, slightly modified), and move the expansion of helo_data till after
3189 the connection is made in the smtp transport (so it can use these
3192 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3194 PH/14 Added log_selector = +pid.
3196 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3198 PH/16 Add ${if forany and ${if forall.
3200 PH/17 Added dsn_from option to vary the From: line in DSNs.
3202 PH/18 Flush SMTP output before performing a callout, unless control =
3203 no_callout_flush is set.
3205 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3206 was true (the default) a successful delivery failed to delete the retry
3207 item, thus causing premature timeout of the address. The bug is now
3210 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3212 PH/21 Long custom messages for fakedefer and fakereject are now split up
3213 into multiline responses in the same way that messages for "deny" and
3214 other ACL rejections are.
3216 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3217 with slight modification.
3219 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3220 draft, changing the syntax and factoring some duplicate code".
3222 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3223 for deliveries of the second and subsequent messages over the same SMTP
3226 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3227 ${reduce, with only minor "tidies".
3229 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3231 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3232 expansion side effects.
3234 PH/27 When a message times out after an over-quota error from an Exim-imposed
3235 quota, the bounce message says "mailbox is full". This message was not
3236 being given when it was a system quota that was exceeded. It now should
3239 MH/03 Made $recipients available in local_scan(). local_scan() already has
3240 better access to the recipient list through recipients_list[], but
3241 $recipients can be useful in postmaster-provided expansion strings.
3243 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3244 in the case of a MAIL command with additional options following the
3245 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3246 were accidentally chopped off.
3248 PH/29 SMTP synchronization checks are implemented when a command is read -
3249 there is a check that no more input is waiting when there shouldn't be
3250 any. However, for some commands, a delay in an ACL can mean that it is
3251 some time before the response is written. In this time, more input might
3252 arrive, invalidly. So now there are extra checks after an ACL has run for
3253 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3254 pipelining has not been advertised.
3256 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3258 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3259 returned in the SMTP response when smtp_return_error_details was false.
3260 This has been fixed.
3262 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3263 instead of the C I/O that was originally supplied, because problems were
3264 reported on Solaris.
3266 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3267 Exim which did not show up earlier: it was assuming that a call to
3268 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3269 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3270 was a macro that became an assignment, so it seemed to work. This has
3271 changed to a proper function call with a void return, hence the compile
3272 error. Exim's code has been fixed.
3274 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3277 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3279 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3281 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3282 because it turns out to be too big or there is a timeout) there is no
3283 "Completed" line in the log. When some messages of this type were
3284 selected by exigrep, they were listed as "not completed". Others were
3285 picked up by some special patterns. I have improved the selection
3286 criteria to be more general.
3288 PH/38 The host_find_failed option in the manualroute router can now be set
3289 to "ignore", to completely ignore a host whose IP address cannot be
3290 found. If all hosts are ignored, the behaviour is controlled by the new
3291 host_all_ignored option.
3293 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3294 homing or because of multiple MX records with /mx) generated more than
3295 one IP address, and the following item turned out to be the local host,
3296 all the secondary addresses of the first item were incorrectly removed
3297 from the list, along with the local host and any following hosts (which
3298 is what is supposed to happen).
3300 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3301 whoever called Exim into the -H file. In the case of the daemon it was
3302 behaving confusingly. When first started, it used values for whoever
3303 started the daemon, but after a SIGHUP it used the Exim user (because it
3304 calls itself on a restart). I have changed the code so that it now always
3307 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3308 message are rejected with the same error (e.g. no authentication or bad
3309 sender address), and a DATA command is nevertheless sent (as can happen
3310 with PIPELINING or a stupid MUA), the error message that was given to the
3311 RCPT commands is included in the rejection of the DATA command. This is
3312 intended to be helpful for MUAs that show only the final error to their
3315 PH/42 Another patch from the Sieve maintainer.
3317 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3318 Eximstats - Fixed some broken HTML links and added missing column headers
3320 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3321 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3323 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3325 PH/43 Yet another patch from the Sieve maintainer.
3327 PH/44 I found a way to check for a TCP/IP connection going away before sending
3328 the response to the final '.' that terminates a message, but only in the
3329 case where the client has not sent further data following the '.'
3330 (unfortunately, this is allowed). However, in many cases there won't be
3331 any further data because there won't be any more messages to send. A call
3332 to select() can be used: if it shows that the input is "ready", there is
3333 either input waiting, or the socket has been closed. An attempt to read
3334 the next input character can distinguish the two cases. Previously, Exim
3335 would have sent an OK response which the client would never have see.
3336 This could lead to message repetition. This fix should cure that, at
3337 least in a lot of common cases.
3339 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3340 advertised in response to EHLO.
3346 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3347 fixed by 4.65/MH/01 (is this a record?) are fixed:
3349 (i) An empty string was always treated as zero by the numeric comparison
3350 operators. This behaviour has been restored.
3352 (ii) It is documented that the numeric comparison operators always treat
3353 their arguments as decimal numbers. This was broken in that numbers
3354 starting with 0 were being interpreted as octal.
3356 While fixing these problems I realized that there was another issue that
3357 hadn't been noticed. Values of message_size_limit (both the global option
3358 and the transport option) were treated as octal if they started with 0.
3359 The documentation was vague. These values are now always treated as
3360 decimal, and I will make that clear in the documentation.
3366 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3367 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3370 MH/01 Don't check that the operands of numeric comparison operators are
3371 integers when their expansion is in "skipping" mode (fixes bug
3372 introduced by 4.64-PH/07).
3374 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3375 child addresses, Exim now panics and dies. Previously, because the count
3376 is held in a short int, deliveries were likely to be lost. As such a
3377 large number of recipients for a single message is ridiculous
3378 (performance will be very, very poor), I have chosen to impose a limit
3379 rather than extend the field.
3385 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3386 leftover -K file (the existence of which was triggered by #402).
3387 While we were at it, introduced process PID as part of the -K
3388 filename. This should rule out race conditions when creating
3391 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3392 processing considerably. Previous code took too long for large mails,
3393 triggering a timeout which in turn triggers #401.
3395 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3396 in the DK code in transports.c. sendfile() is not really portable,
3397 hence the _LINUX specificness.
3399 TF/01 In the add_headers option to the mail command in an Exim filter,
3400 there was a bug that Exim would claim a syntax error in any
3401 header after the first one which had an odd number of characters
3404 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3405 callout verification, Exim cached a "reject" for the entire domain. This
3406 is correct for most verifications, but it is not correct for a recipient
3407 verification with use_sender or use_postmaster set, because in that case
3408 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3409 case of MAIL FROM:<> rejection from other early rejections (e.g.
3410 rejection of HELO). When verifying a recipient using a non-null MAIL
3411 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3412 Whatever the result of the callout, the value of the domain cache is
3413 left unchanged (for any other kind of callout, getting as far as trying
3414 RCPT means that the domain itself is ok).
3416 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3419 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3420 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3421 session, the daemon ignores ECONNECT errors and logs others; it now
3422 ignores EPIPE as well.
3424 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3425 (quoted-printable decoding).
3427 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3428 later the small subsequent patch to fix an introduced bug.
3430 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3432 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3434 PH/08 An error is now given if message_size_limit is specified negative.
3436 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3437 to be given (somewhat) arbitrary names.
3439 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3442 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3443 miscellaneous code fixes
3445 PH/10 Added the log_reject_target ACL modifier to specify where to log
3448 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3449 hostname. This is wrong, because it relates to the incoming message (and
3450 probably the interface on which it is arriving) and not to the outgoing
3451 callout (which could be using a different interface). This has been
3452 changed to use the value of the helo_data option from the smtp transport
3453 instead - this is what is used when a message is actually being sent. If
3454 there is no remote transport (possible with a router that sets up host
3455 addresses), $smtp_active_hostname is used.
3457 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3458 tweaks were necessary in order to get it to work (see also 21 below):
3459 (a) The code assumed that strncpy() returns a negative number on buffer
3460 overflow, which isn't the case. Replaced with Exim's string_format()
3462 (b) There were several signed/unsigned issues. I just did the minimum
3463 hacking in of casts. There is scope for a larger refactoring.
3464 (c) The code used strcasecmp() which is not a standard C function.
3465 Replaced with Exim's strcmpic() function.
3466 (d) The code set only $1; it now sets $auth1 as well.
3467 (e) A simple test gave the error "authentication client didn't specify
3468 service in request". It would seem that Dovecot has changed its
3469 interface. Fortunately there's a specification; I followed it and
3470 changed what the client sends and it appears to be working now.
3472 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3475 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3476 address A is aliased to B and C, where B exists and C does not. Without
3477 -v the output is "A verified" because verification stops after a
3478 successful redirection if more than one address is generated. However,
3479 with -v the child addresses are also verified. Exim was outputting "A
3480 failed to verify" and then showing the successful verification for C,
3481 with its parentage. It now outputs "B failed to verify", showing B's
3482 parentage before showing the successful verification of C.
3484 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3485 look up a TXT record in a specific list after matching in a combined
3488 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3489 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3490 they consult the DNS. I had assumed they would set it the way they
3491 wanted; and indeed my experiments on Linux seem to show that in some
3492 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3493 To be on the safe side, however, I have now made the interface to
3494 host_find_byname() similar to host_find_bydns(), with an argument
3495 containing the DNS resolver options. The host_find_byname() function now
3496 sets these options at its start, just as host_find_bydns() does. The smtp
3497 transport options dns_qualify_single and dns_search_parents are passed to
3498 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3499 of host_find_byname() use the default settings of RES_DEFNAMES
3500 (qualify_single) but not RES_DNSRCH (search_parents).
3502 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3503 spool_read_header() do less string testing, by means of a preliminary
3504 switch on the second character of optional "-foo" lines. (This is
3505 overdue, caused by the large number of possibilities that now exist.
3506 Originally there were few.) While I was there, I also converted the
3507 str(n)cmp tests so they don't re-test the leading "-" and the first
3508 character, in the hope this might squeeze out yet more improvement.
3510 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3511 flag allowing group syntax was set by the header_syntax check but not
3512 turned off, possible causing trouble later; (2) The flag was not being
3513 set at all for the header_verify test, causing "group"-style headers to
3514 be rejected. I have now set it in this case, and also caused header_
3515 verify to ignore an empty address taken from a group. While doing this, I
3516 came across some other cases where the code for allowing group syntax
3517 while scanning a header line wasn't quite right (mostly, not resetting
3518 the flag correctly in the right place). These bugs could have caused
3519 trouble for malformed header lines. I hope it is now all correct.
3521 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3522 with the "reply" argument non-NULL. The code, however (which originally
3523 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3524 but it didn't always do it. This confused somebody who was copying the
3525 code for some other use. I have removed all the tests.
3527 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3528 feature that was used to support insecure browsers during the U.S. crypto
3529 embargo. It requires special client support, and Exim is probably the
3530 only MTA that supported it -- and would never use it because real RSA is
3531 always available. This code has been removed, because it had the bad
3532 effect of slowing Exim down by computing (never used) parameters for the
3533 RSA_EXPORT functionality.
3535 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3536 authenticator to fail if there's a tab character in the incoming data
3537 (there should never be unless someone is messing about, as it's supposed
3538 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3539 if the connection is using TLS or if the remote IP is the same as the
3540 local IP, and the "valid-client-cert option" if a client certificate has
3543 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3544 authenticators. This can be used for authorization after authentication
3545 succeeds. (In the case of plaintext, it servers for both authentication
3548 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3549 if any retry times were supplied.
3551 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3552 connection, where there is no client IP address to check. In this
3553 situation, the verify now always succeeds.
3555 PH/25 Applied John Jetmore's -Mset patch.
3557 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3559 PH/27 In a string expansion for a processed (not raw) header when multiple
3560 headers of the same name were present, leading whitespace was being
3561 removed from all of them, but trailing whitespace was being removed only
3562 from the last one. Now trailing whitespace is removed from each header
3563 before concatenation. Completely empty headers in a concatenation (as
3564 before) are ignored.
3566 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3567 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3569 PH/29 [Removed. This was a change that I later backed out, and forgot to
3570 correct the ChangeLog entry (that I had efficiently created) before
3571 committing the later change.]
3573 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3574 address errors (4xx response to RCPT) over the same connection as other
3575 messages routed to the same hosts. Such deliveries are always "forced",
3576 so retry times are not inspected. This resulted in far too many retries
3577 for the affected addresses. The effect occurred only when there were more
3578 hosts than the hosts_max_try setting in the smtp transport when it had
3579 the 4xx errors. Those hosts that it had tried were not added to the list
3580 of hosts for which the message was waiting, so if all were tried, there
3581 was no problem. Two fixes have been applied:
3583 (i) If there are any address or message errors in an SMTP delivery, none
3584 of the hosts (tried or untried) are now added to the list of hosts
3585 for which the message is waiting, so the message should not be a
3586 candidate for sending over the same connection that was used for a
3587 successful delivery of some other message. This seems entirely
3588 reasonable: after all the message is NOT "waiting for some host".
3589 This is so "obvious" that I'm not sure why it wasn't done
3590 previously. Hope I haven't missed anything, but it can't do any
3591 harm, as the worst effect is to miss an optimization.
3593 (ii) If, despite (i), such a delivery is accidentally attempted, the
3594 routing retry time is respected, so at least it doesn't keep
3595 hammering the server.
3597 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3598 in ${readsocket because some servers need this prod.
3600 PH/32 Added some extra debug output when updating a wait-xxx database.
3602 PH/33 The hint "could be header name not terminated by colon", which has been
3603 given for certain expansion errors for a long time, was not being given
3604 for the ${if def:h_colon_omitted{... case.
3606 PH/34 The spec says: "With one important exception, whenever a domain list is
3607 being scanned, $domain contains the subject domain." There was at least
3608 one case where this was not true.
3610 PH/35 The error "getsockname() failed: connection reset by peer" was being
3611 written to the panic log as well as the main log, but it isn't really
3612 panic-worthy as it just means the connection died rather early on. I have
3613 removed the panic log writing for the ECONNRESET error when getsockname()
3616 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3617 runs only) independently of the message's sender address. This meant
3618 that, if the 4xx error was in fact related to the sender, a different
3619 message to the same recipient with a different sender could confuse
3620 things. In particular, this can happen when sending to a greylisting
3621 server, but other circumstances could also provoke similar problems.
3622 I have changed the default so that the retry time for these errors is now
3623 based a combination of the sender and recipient addresses. This change
3624 can be overridden by setting address_retry_include_sender=false in the
3627 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3628 remote server are returned as part of bounce messages. This was not
3629 happening for LMTP over a pipe (the lmtp transport), but now it is the
3630 same for both kinds of LMTP.
3632 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3633 in header lines that were in fact CNAMEs. This is no longer the case.
3635 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3636 and queue runs started by the daemon processed all messages. This has
3637 been fixed so that -R and -S can now usefully be given with -q<time>.
3639 PH/40 Import PCRE release 6.7 (fixes some bugs).
3641 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3643 PH/42 Give an error if -q is specified more than once.
3645 PH/43 Renamed the variables $interface_address and $interface_port as
3646 $received_ip_address and $received_port, to make it clear that these
3647 values apply to message reception, and not to the outgoing interface when
3648 a message is delivered. (The old names remain recognized, of course.)
3650 PH/44 There was no timeout on the connect() call when using a Unix domain
3651 socket in the ${readsocket expansion. There now is.
3653 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3654 be meaningful with "accept".
3656 SC/01 Eximstats V1.43
3657 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3659 SC/02 Eximstats V1.44
3660 Use a glob alias rather than an array ref in the generated
3661 parser. This improves both readability and performance.
3663 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3664 Collect SpamAssassin and rejection statistics.
3665 Don't display local sender or destination tables unless
3666 there is data to show.
3667 Added average volumes into the top table text output.
3669 SC/04 Eximstats V1.46
3670 Collect data on the number of addresses (recipients)
3671 as well as the number of messages.
3673 SC/05 Eximstats V1.47
3674 Added 'Message too big' to the list of mail rejection
3675 reasons (thanks to Marco Gaiarin).
3677 SC/06 Eximstats V1.48
3678 Mainlog lines which have GMT offsets and are too short to
3679 have a flag are now skipped.
3681 SC/07 Eximstats V1.49 (Alain Williams)
3682 Added the -emptyok flag.
3684 SC/08 Eximstats V1.50
3685 Fixes for obtaining the IP address from reject messages.
3687 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3688 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3689 whitespace changes from 4.64-PH/27
3691 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3694 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3695 are found, allow negative numbers in numeric criteria)
3697 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3699 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3700 to match changes made in 4.64-PH/43
3702 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3704 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3705 "domain" is actually an IP address, and force a failure. This locks out
3706 those revolvers/nameservers that support "A-for-A" lookups, in
3707 contravention of the specifications.
3709 PH/48 When a host name was looked up from an IP address, and the subsequent
3710 forward lookup of the name timed out, the host name was left in
3711 $sender_host_name, contrary to the specification.
3713 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3714 restricted to single-key lookups, Exim was not diagnosing an error if
3715 * or *@ was used with a query-style lookup.
3717 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3719 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3720 long ago, but noone interested enough thought of it. Let's just say that
3721 the "1.1" means that there are some new functions that weren't there at
3722 some point in the past.
3724 PH/51 Error processing for expansion failure of helo_data from an smtp
3725 transport during callout processing was broken.
3727 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3728 tested/used via the -bh/-bhc/-bs options.
3730 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3731 bug, fixed in subsequent PCRE releases).
3733 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3734 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3736 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3742 SC/01 Use a glob alias rather than an array ref in eximstats generated
3743 parser. This improves both readability and performance.
3745 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3746 Don't display local sender or destination tables in eximstats unless
3747 there is data to show.
3748 Added average volumes into the eximstats top table text output.
3750 SC/03 Collect data on the number of addresses (recipients) as well
3751 as the number of messages in eximstats.
3753 TF/01 Correct an error in the documentation for the redirect router. Exim
3754 does (usually) call initgroups() when daemonizing.
3756 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3757 with consistent privilege compared to when running as a daemon.
3759 TF/03 Note in the spec that $authenticated_id is not set for local
3760 submissions from trusted users.
3762 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3763 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3765 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3766 by adding some example configuration directives to the default
3767 configuration file. A little bit of work is required to uncomment the
3768 directives and define how usernames and passwords are checked, but
3769 there is now a framework to start from.
3771 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3772 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3773 without this. I don't know how relevant this is to other LDAP libraries.
3775 PH/02 Add the verb name to the "unknown ACL verb" error.
3777 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3779 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3781 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3782 directory not expanded when it should be if an expanded home directory
3783 was set for the address (which is overridden by the transport).
3785 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3788 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3789 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3790 because it is too late at that time, and has no effect.
3792 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3793 security issue with \' (bugzilla #107). I could not use the
3794 PQescapeStringConn() function, because it needs a PGconn value as one of
3797 PH/08 When testing addresses using -bt, indicate those final addresses that
3798 are duplicates that would not cause an additional delivery. At least one
3799 person was confused, thinking that -bt output corresponded to deliveries.
3800 (Suppressing duplicates isn't a good idea as you lose the information
3801 about possibly different redirections that led to the duplicates.)
3803 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3804 systems where poll() doesn't work, in particular OS X.
3806 PH/10 Added more information to debugging output for retry time not reached.
3808 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3809 operations in malware.c.
3811 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3814 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3815 syslog_duplication set false, log lines that would normally be written
3816 both the the main log and to the reject log were not written to syslog at
3819 PH/14 In the default configuration, change the use of "message" in ACL warn
3820 statements to "add_header".
3822 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3823 not followed by a command (e.g. "seen endif").
3825 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3826 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3829 PH/17 Added extra conditions to the default value of delay_warning_condition
3833 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3834 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3835 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3838 The Auto-Submitted: and various List- headers are standardised, whereas I
3839 don't think Precedence: ever was.
3841 PH/18 Refactored debugging code in route_finduser() to show more information,
3842 in particular, the error code if getpwnam() issues one.
3844 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3845 This is apparently needed in addition to the PH/07 change above to avoid
3846 any possible encoding problems.
3848 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3849 but not after initializing Perl.
3851 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3852 output them only if debugging. By default they are written stderr,
3853 apparently, which is not desirable.
3855 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3858 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3861 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3863 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3864 authenticated or an ident call has been made. Suppress the default
3865 values for $authenticated_id and $authenticated_sender (but permit -oMai
3866 and -oMas) when testing with -bh.
3868 PH/24 Re-jigged the order of the tests in the default configuration so that the
3869 tests for valid domains and recipients precede the DNS black list and CSA
3870 tests, on the grounds that those ones are more expensive.
3872 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3873 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3874 This bug exists in every version of Exim that I still have, right back to
3877 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3878 However, an attempt to turn on case-sensitivity in a regex key by
3879 including (?-i) didn't work because the subject string was already
3880 lowercased, and the effects were non-intuitive. It turns out that a
3881 one-line patch can be used to allow (?-i) to work as expected.
3887 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3888 other effects) broke the use of negated acl sub-conditions.
3890 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3893 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3894 "Deny" causes Exim to reject the incoming connection with a 554 error.
3895 Unfortunately, if there is a major crisis, such as a disk failure,
3896 tcp-wrappers gives "deny", whereas what one would like would be some
3897 kind of temporary error. A kludge has been added to help with this.
3898 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3899 554 error is used if errno is still zero or contains ENOENT (which occurs
3900 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3903 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3905 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3906 errors. Otherwise a message that provokes a temporary error (when other
3907 messages do not) can cause a whole host to time out.
3909 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3910 addresses were routed directly to files or pipes from a redirect router.
3911 File deliveries just didn't batch; pipe deliveries might have suffered
3914 PH/06 A failure to get a lock for a hints database would erroneously always say
3915 "Failed to get write lock", even when it was really a read lock.
3917 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3918 of 0600. This has been changed to use the value of the lockfile_mode
3919 option (which defaults to 0600).
3921 PH/08 Applied small patch from the Sieve maintainer.
3923 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3924 folder from quota calculations, a direct delivery into this folder messed
3925 up the contents of the maildirsize file. This was because the regex was
3926 used only to exclude .Trash (or whatever) when the size of the mailbox
3927 was calculated. There was no check that a delivery was happening into an
3928 excluded directory. This bug has been fixed by ignoring all quota
3929 processing for deliveries into excluded directories.
3931 PH/10 Added the maildirfolder_create_regex option to appendfile.
3937 PH/01 The code for finding all the local interface addresses on a FreeBSD
3938 system running IPv6 was broken. This may well have applied to all BSD
3939 systems, as well as to others that have similar system calls. The broken
3940 code found IPv4 interfaces correctly, but gave incorrect values for the
3941 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3942 that it would not match correctly against @[] and not recognize the IPv6
3945 PH/02 The ipliteral router was not recognizing addresses of the form user@
3946 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3948 PH/03 Added disable_ipv6.
3950 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3951 decoded form, because it is most often used to construct To: headers
3952 lines in autoreplies, and the decoded form may well be syntactically
3953 invalid. However, $reply_address has leading white space removed, and all
3954 newlines turned into spaces so that the autoreply transport does not
3957 PH/05 If group was specified without a user on a router, and no group or user
3958 was specified on a transport, the group from the router was ignored.
3960 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3961 for visible compile-time settings that can be used to change these
3962 numbers, for those that want even more. Backwards compatibility with old
3963 spool files has been maintained. However, going back to a previous Exim
3964 release will lost any variables that are in spool files.
3966 PH/07 Two small changes when running in the test harness: increase delay when
3967 passing a TCP/IP connection to a new process, in case the original
3968 process has to generate a bounce, and remove special handling of
3969 127.0.0.2 (sic), which is no longer necessary.
3971 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3972 be the same on different OS.
3974 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3977 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3978 whether --show-vars was specified or not
3980 JJ/02 exipick: Added support for new ACL variable spool format introduced
3983 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3984 syntactically invalid From: or Reply-to: line, and a filter used this to
3985 generate an autoreply, and therefore failed to obtain an address for the
3986 autoreply, Exim could try to deliver to a non-existent relative file
3987 name, causing unrelated and misleading errors. What now happens is that
3988 it logs this as a hard delivery error, but does not attempt to create a
3991 PH/11 The exinext utility has a -C option for testing purposes, but although
3992 the given file was scanned by exinext itself; it wasn't being passed on
3993 when Exim was called.
3995 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3996 an end-of-file indication when reading a command response.
3998 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3999 compiled. In many other places in Exim, IPv6 addresses are always
4000 recognized, so I have changed this. It also means that IPv4 domain
4001 literals of the form [IPV4:n.n.n.n] are now always recognized.
4003 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4004 used if the router is not running as root, for example, when verifying at
4005 ACL time, or when using -bh. The debugging output from this situation was
4006 non-existent - all you got was a failure to exec. I have made two
4009 (a) Failures to set uid/gid, the current directory, or a process leader
4010 in a subprocess such as that created by queryprogram now generate
4011 suitable debugging output when -d is set.
4013 (b) The queryprogram router detects when it is not running as root,
4014 outputs suitable debugging information if -d is set, and then runs
4015 the subprocess without attempting to change uid/gid.
4017 PH/15 Minor change to Makefile for building test_host (undocumented testing
4020 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4021 additional section of a DNS packet that returns MX or SRV records.
4022 Instead, it always explicitly searches for A/AAAA records. This avoids
4023 major problems that occur when a DNS server includes only records of one
4024 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4025 fixed another bug: if SRV records were looked up and the corresponding
4026 address records were *not* found in the additional section, the port
4027 values from the SRV records were lost.
4029 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4030 using the correct key (the original address) when searching the retry
4031 rules in order to find which one to use for generating the retry hint.
4033 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4034 adding the default one. Similarly, if it contains a Reply-To: header, the
4035 errors_reply_to option, if set, is not used.
4037 PH/19 When calculating a retry time, Exim used to measure the "time since
4038 failure" by looking at the "first failed" field in the retry record. Now
4039 it does not use this if it is later than than the arrival time of the
4040 message. Instead it uses the arrival time. This makes for better
4041 behaviour in cases where some deliveries succeed, thus re-setting the
4042 "first failed" field. An example is a quota failure for a huge message
4043 when small messages continue to be delivered. Without this change, the
4044 "time since failure" will always be short, possible causing more frequent
4045 delivery attempts for the huge message than are intended.
4046 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4048 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4049 $1, $2, $3) because the numerical variables can be reset during some
4050 expansion items (e.g. "match"), thereby losing the authentication data.
4052 PH/21 Make -bV show the size of off_t variables so that the test suite can
4053 decide whether to run tests for quotas > 2G.
4055 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4056 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4057 filecount value is greater than 2G or if a quota value is greater than 2G
4058 on a system where the size of off_t is not greater than 4, a panic error
4061 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4062 never match. The debug and -bh output now contains an explicit error
4063 message indicating a malformed IPv4 address or mask.
4065 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4066 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4067 PH/23 above applies.
4069 PH/25 Do not write to syslog when running in the test harness. The only
4070 occasion when this arises is a failure to open the main or panic logs
4071 (for which there is an explicit test).
4073 PH/26 Added the /no_tell option to "control=freeze".
4075 PH/27 If a host name lookup failed very early in a connection, for example, if
4076 the IP address matched host_lookup and the reverse lookup yielded a name
4077 that did not have a forward lookup, an error message of the form "no IP
4078 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4079 could be logged. Now it outputs the IP address instead of "NULL".
4081 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4082 allows the sender and the authenticated sender to be set when
4083 submitting a message from within Exim. Since child_open_exim() is
4084 documented for local_scan(), the new function should be too.
4086 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4087 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4088 results in an empty string is now treated as unset.
4090 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4092 PH/31 Added sender_verify_fail logging option.
4094 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4095 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4096 tidied the source and removed it altogether.
4098 PH/33 When a queue run was abandoned because the load average was too high, a
4099 log line was always written; now it is written only if the queue_run log
4100 selector is set. In addition, the log line for abandonment now contains
4101 information about the queue run such as the pid. This is always present
4102 in "start" and "stop" lines but was omitted from the "abandon" line.
4104 PH/34 Omit spaces between a header name and the colon in the error message that
4105 is given when verify = headers_syntax fails (if there are lots of them,
4106 the message gets confusing).
4108 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4109 names, as there are now some PTR records that contain slashes. This check
4110 is only to protect against broken name servers that fall over on strange
4111 characters, so the fact that it applies to all lookups doesn't matter.
4113 PH/36 Now that the new test suite is complete, we can remove some of the
4114 special code in Exim that was needed for the old test suite. For example,
4115 sorting DNS records because real resolvers return them in an arbitrary
4116 order. The new test suite's fake resolver always returns records in the
4119 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4120 bounces) except when queue_only is set, to avoid logging races between
4121 the different processes.
4123 PH/38 Panic-die if .include specifies a non-absolute path.
4125 PH/39 A tweak to the "H" retry rule from its user.
4127 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4128 a label. They prevented compilation on older perls.
4130 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4131 a warning to be raised on newish perls.
4133 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4134 on queue. Changes to match documented behaviour of showing count of
4135 messages matching specified criteria.
4137 PH/40 Changed the default ident timeout from 30s to 5s.
4139 PH/41 Added support for the use of login_cap features, on those BSD systems
4140 that have them, for controlling the resources used by pipe deliveries.
4142 PH/42 The content-scanning code uses fopen() to create files in which to put
4143 message data. Previously it was not paying any attention to the mode of
4144 the files. Exim runs with umask(0) because the rest of the code creates
4145 files with open(), and sets the required mode explicitly. Thus, these
4146 files were ending up world-writeable. This was not a big issue, because,
4147 being within the spool directory, they were not world-accessible. I have
4148 created a function called modefopen, which takes an additional mode
4149 argument. It sets umask(777), creates the file, chmods it to the required
4150 mode, then resets the umask. All the relevant calls to fopen() in the
4151 content scanning code have been changed to use this function.
4153 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4154 to 24 hours. This avoids potential overflow problems when processing G
4155 and H retry rules. I suspect nobody ever tinkers with this value.
4157 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4159 PH/45 When the plaintext authenticator is running as a client, the server's
4160 challenges are checked to ensure they are valid base64 strings. By
4161 default, the authentication attempt is cancelled if an invalid string is
4162 received. Setting client_ignore_invalid_base64 true ignores these errors.
4163 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4164 they are received. Thus, the responses can be made to depend on the
4165 challenges. If an invalid string is ignored, an empty string is placed in
4168 PH/46 Messages that are created by the autoreply transport now contains a
4169 References: header, in accordance with RFCs 2822 and 3834.
4171 PH/47 Added authenticated_sender_force to the smtp transport.
4173 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4175 PH/49 Installed latest patch from the Sieve maintainer.
4177 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4178 was also set, the appendfile transport was unnecessarily scanning a
4179 directory of message files (e.g. for maildir delivery) to find the count
4180 of files (along with the size), even though it did not need this
4181 information. It now does the scan only if it needs to find either the
4182 size of the count of files.
4184 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4186 PH/52 Two bugs concerned with error handling when the smtp transport is
4189 (i) Exim was not creating retry information for temporary errors given
4190 for individual recipients after the DATA command when the smtp transport
4191 was used in LMTP mode. This meant that they could be retried too
4192 frequently, and not timed out correctly.
4194 (ii) Exim was setting the flag that allows error details to be returned
4195 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4196 recipients that were returned after the DATA command.
4198 PH/53 This is related to PH/52, but is more general: for any failing address,
4199 when detailed error information was permitted to be returned to the
4200 sender, but the error was temporary, then after the final timeout, only
4201 "retry timeout exceeded" was returned. Now it returns the full error as
4202 well as "retry timeout exceeded".
4204 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4205 do this, and (what is worse) MTAs that accept it.
4207 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4208 will now be deprecated.
4210 PH/56 New os.c-cygwin from the Cygwin maintainer.
4212 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4213 formats (previously only available in exim formats via -bpr, -bpru,
4214 and -bpra. Now also available in native and exiqgrep formats)
4216 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4217 with very large, slow to parse queues
4219 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4221 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4223 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4224 responses to authentication challenges, though it was showing the
4225 challenges; (ii) I've removed the CR characters from the debug output for
4228 PH/58 Allow for the insertion of a newline as well as a space when a string
4229 is turned into more than one encoded-word during RFC 2047 encoding. The
4230 Sieve code now uses this.
4232 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4233 data_4xx, lost_connection, tls_required.
4235 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4236 message was being sent as an SMTP response.
4238 PH/61 Add -l and -k options to exicyclog.
4240 PH/62 When verifying, if an address was redirected to one new address, so that
4241 verification continued, and the new address failed or deferred after
4242 having set something in $address_data, the value of $address_data was not
4243 passed back to the ACL. This was different to the case when no
4244 redirection occurred. The value is now passed back in both cases.
4246 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4247 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4248 use login_cap.h, so on its own it isn't the distinguishing feature. The
4249 new name refers directly to the setclassresources() function.
4251 PH/65 Added configuration files for NetBSD3.
4253 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4255 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4256 is preferred over IPv4.
4258 PH/68 The bounce_return_message and bounce_return_body options were not being
4259 honoured for bounces generated during the reception of non-SMTP messages.
4260 In particular, this applied to messages rejected by the ACL. This bug has
4261 been fixed. However, if bounce_return_message is true and bounce_return_
4262 body is false, the headers that are returned for a non-SMTP message
4263 include only those that have been read before the error was detected.
4264 (In the case of an ACL rejection, they have all been read.)
4266 PH/69 The HTML version of the specification is now built in a directory called
4267 spec_html instead of spec.html, because the latter looks like a path with
4268 a MIME-type, and this confuses some software.
4270 PH/70 Catch two compiler warnings in sieve.c.
4272 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4273 function verify_get_ident() calls ip_connect() to connect a socket, but
4274 if the "connect()" function timed out, ip_connect() used to close the
4275 socket. However, verify_get_ident() also closes the socket later, and in
4276 between Exim writes to the log, which may get opened at this point. When
4277 the socket was closed in ip_connect(), the log could get the same file
4278 descriptor number as the socket. This naturally causes chaos. The fix is
4279 not to close the socket in ip_connect(); the socket should be closed by
4280 the function that creates it. There was only one place in the code where
4281 this was missing, in the iplookup router, which I don't think anybody now
4282 uses, but I've fixed it anyway.
4284 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4285 well as to direct DNS lookups. Otherwise the handling of names in host
4286 lists is inconsistent and therefore confusing.
4292 PH/01 Two changes to the default runtime configuration:
4294 (1) Move the checks for relay_from_hosts and authenticated clients from
4295 after to before the (commented out) DNS black list checks.
4297 (2) Add control=submission to the relay_from_hosts and authenticated
4298 clients checks, on the grounds that messages accepted by these
4299 statements are most likely to be submissions.
4301 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4303 (1) Generate an error if the third argument for the ${prvs expansion is
4306 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4309 (3) Reset the variables that are obtained from the first argument of
4310 ${prvscheck and used in the second argument before leaving the code,
4311 because their memory is reclaimed, so using them afterwards may do
4314 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4315 one (it's much easier than Tom thought :-).
4317 (5) Because of (4), we can now allow for the use of $prvscheck_result
4318 inside the third argument.
4320 PH/03 For some reason, the default setting of PATH when running a command from
4321 a pipe transport was just "/usr/bin". I have changed it to
4324 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4325 anything to be listed in the output from -bV.
4327 PH/05 When a filter generated an autoreply, the entire To: header line was
4328 quoted in the delivery log line, like this:
4330 => >A.N.Other <ano@some.domain> <original@ddress> ...
4332 This has been changed so that it extracts the operative address. There
4333 may be more than one such address. If so, they are comma-separated, like
4336 => >ano@some.domain,ona@other.domain <original@ddress> ...
4338 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4339 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4340 not being looked up in the rDNS to get a host name, Exim was showing the
4341 IP address twice in Received: lines, even though the IP addresses were
4342 identical. For example:
4344 Received: from [1.2.3.4] (helo=[1.2.3.4])
4346 However, if the real host name was known, it was omitting the HELO data
4347 if it matched the actual IP address. This has been tidied up so that it
4348 doesn't show the same IP address twice.
4350 PH/07 When both +timestamp and +memory debugging was on, the value given by
4351 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4352 called by the debug printing, thereby overwriting the timestamp buffer.
4353 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4355 PH/08 When the original message was included in an autoreply transport, it
4356 always said "this is a copy of the message, including all the headers",
4357 even if body_only or headers_only was set. It now gives an appropriate
4360 PH/09 Applied a patch from the Sieve maintainer which:
4362 o fixes some comments
4363 o adds the (disabled) notify extension core
4364 o adds some debug output for the result of if/elsif tests
4365 o points to the current vacation draft in the documentation
4366 and documents the missing references header update
4370 o fixes a bug in processing the envelope test (when testing
4371 multiple envelope elements, the last element determined the
4374 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4375 Electronic Mail") by including:
4377 Auto-submitted: auto-generated
4379 in the messages that it generates (bounce messages and others, such as
4380 warnings). In the case of bounce messages for non-SMTP messages, there was
4381 also a typo: it was using "Auto_submitted" (underscore instead of
4382 hyphen). Since every message generated by Exim is necessarily in response
4383 to another message, thes have all been changed to:
4385 Auto-Submitted: auto-replied
4387 in accordance with these statements in the RFC:
4389 The auto-replied keyword:
4391 - SHOULD be used on messages sent in direct response to another
4392 message by an automatic process,
4394 - MUST NOT be used on manually-generated messages,
4396 - MAY be used on Delivery Status Notifications (DSNs) and Message
4397 Disposition Notifications (MDNs),
4399 - MUST NOT be used on messages generated by automatic or periodic
4400 processes, except for messages which are automatic responses to
4403 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4404 to the default Received: header definition.
4406 PH/12 Added log selector acl_warn_skipped (default on).
4408 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4409 variables because (a) they are in the wrong storage pool and (b) even if
4410 they were copied, it wouldn't work properly because of the caching.
4412 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4413 checking when decoding. Apparently there are clients that generate
4414 overlong encoded strings. Why am I not surprised?
4416 PH/15 If the first argument of "${if match_address" was not empty, but did not
4417 contain an "@" character, Exim crashed. Now it writes a panic log message
4418 and treats the condition as false.
4420 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4422 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4423 extension "envelope-auth". The code is finished and in agreement with
4424 other implementations, but there is no documentation so far and in fact,
4425 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4426 not changing the active code.
4428 Print executed "if" and "elsif" statements when debugging is used. This
4429 helps a great deal to understand what a filter does.
4431 Document more things not specified clearly in RFC3028. I had all this
4432 sorted out, when out of a sudden new issues came to my mind. Oops."
4434 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4437 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4438 canonical form (as documented). However, after a host name lookup from
4439 the IP address, check_host() was doing a simple string comparison with
4440 addresses acquired from the DNS when checking that the found name did
4441 have the original IP as one of its addresses. Since any found IPv6
4442 addresses are likely to be in abbreviated form, the comparison could
4443 fail. Luckily, there already exists a function for doing the comparison
4444 by converting both addresses to binary, so now that is used instead of
4445 the text comparison.
4447 PH/20 There was another similar case to PH/19, when a complete host name was
4448 given in a host list; looking up its IP address could give an abbreviated
4449 form, whereas the current host's name might or might not be abbreviated.
4450 The same fix has been applied.
4456 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4457 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4460 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4461 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4463 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4465 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4466 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4467 Also, for "Auto-Submitted", treat anything other than "no" as
4468 non-personal, in accordance with RFC 3834. (Previously it treated
4469 anything starting "auto-" as non-personal.)
4471 TF/01 The control=submission/name=... option had a problem with syntax
4472 errors if the name included a slash character. The /name= option
4473 now slurps the rest of the string, so it can include any characters
4474 but it must come last in the list of options (after /sender_retain
4477 PH/05 Some modifications to the interface to the fake nameserver for the new
4485 TK/01 Added the "success_on_redirect" address verification option. See
4486 NewStuff for rationale and an example.
4488 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4490 PH/02 Patch to exigrep to allow it to work on syslog lines.
4492 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4493 fread() to skip over the body file's header line, because in Cygwin the
4494 header line is locked and is inaccessible.
4496 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4497 co-exist for some time) to make it clear that it is the Exim ID that is
4498 referenced, not the Message-ID: header line.
4500 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4501 string_format() function, because snprintf() does not exist on all
4504 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4505 ${stat: expansion item.
4507 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4508 protocol synchronization error", to keep the pedants happy.
4510 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4511 well as for IRIX systems, when gcc is being used. See the host.c source
4514 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4516 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4519 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4520 transport and to the smtp transport in LMTP mode.
4522 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4524 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4525 run a filter in a subprocess. This could lead to confusion in subsequent
4526 lookups in the parent process. There should also be a search_tidyup() at
4527 the end of the subprocess.
4529 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4530 only if the host matched helo_try_verify_hosts, which caused the
4531 verification to occur when the EHLO/HELO command was issued. The ACL just
4532 tested the remembered result. Now, if a previous verification attempt has
4533 not happened, "verify = helo" does it there and then.
4535 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4537 TK/03 Fix log output including CR from clamd.
4539 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4540 exist provoked a memory error which could cause a segfault.
4542 PH/15 Installed PCRE 6.2
4544 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4546 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4547 of the problem. Specifically, suggested +O2 rather than +O1 for the
4550 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4552 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4553 record, the port was not correctly logged when the outgoing_port log
4554 selector was set (it logged the transort's default port).
4556 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4557 fallback_hosts, and "hosts" in the smtp transport.
4559 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4560 host errors such as "Connection refused".
4562 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4563 authentication with radiusclient 0.4.9:
4565 - Error returned from rc_read_config was caught wrongly
4566 - Username/password not passed on to radius server due to wrong length.
4568 The presumption is that some radiusclient API changes for 4.51/PH/17
4569 were not taken care of correctly. The code is still untested by me (my
4570 Linux distribution still has 0.3.2 of radiusclient), but it was
4571 contributed by a Radius user.
4573 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4574 expanding the "port" option of the smtp transport.
4576 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4577 while reading a MIME header. Thanks to Tom Hughes for a patch.
4579 PH/24 Include config.h inside local_scan.h so that configuration settings are
4582 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4583 that in an ACL for RCPT (for example), you can examine exactly what was
4586 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4587 commands, but it was not correctly comparing the address with the actual
4588 client host address. Thus, it would show the EHLO address in Received:
4589 header lines when this was not necessary.
4591 PH/27 Added the % operator to ${eval:}.
4593 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4594 it should be ignoring failures (because with -C, for example, it has lost
4595 privilege). It wasn't ignoring creation failures other than "already
4598 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4601 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4602 because an input line was too long, either on its own, or by virtue of
4603 too many continuations, the temporary file was not being removed, and the
4604 return code was incorrect.
4606 PH/31 Missing "BOOL" in function definition in filtertest.c.
4608 PH/32 Applied Sieve patches from the maintainer.
4610 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4612 PH/33 Added "verify = not_blind".
4614 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4615 Local/Makefile (with some defaults set). These are used in built scripts
4616 such as exicyclog, but they have never been used in the exim_install
4617 script (though there are many overriding facilities there). I have
4618 arranged that the exim_install script now takes note of these two
4621 PH/35 Installed configuration files for Dragonfly.
4623 PH/36 When a locally submitted message by a trusted user did not contain a
4624 From: header, and the sender address was obtained from -f or from an SMTP
4625 MAIL command, and the trusted user did not use -F to supply a sender
4626 name, $originator_name was incorrectly used when constructing a From:
4627 header. Furthermore, $originator_name was used for submission mode
4628 messages from external hosts without From: headers in a similar way,
4629 which is clearly wrong.
4631 PH/37 Added control=suppress_local_fixups.
4633 PH/38 When log_selector = +received_sender was set, and the addition of the
4634 sender made the log line's construction buffer exactly full, or one byte
4635 less than full, an overflow happened when the terminating "\n" was
4638 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4639 when the result of a list match is failure because a DNS lookup failed.
4641 PH/40 RM_COMMAND is now used in the building process.
4643 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4644 the "build-* directories that it finds.
4646 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4647 address in a domain literal was a prefix of an interface address.
4649 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4650 when verifying a sender address, unless rewrite_headers is false.
4652 PH/44 Wrote a long comment about why errors_to addresses are verified as
4653 recipients, not senders.
4655 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4656 the ratelimit ACL was added.
4658 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4660 PH/46 Added extra information about PostgreSQL errors to the error string.
4662 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4663 avoiding the need to install special zones in a real server. This is
4664 backwards compatible; if it can't find the fake resolver, it drops back.
4665 Thus, both old and new test suites can be run.
4667 TF/02 Added util/ratelimit.pl
4669 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4670 clock is set back in time.
4672 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4673 Candler <B.Candler@pobox.com>.
4675 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4676 OK for addresses that are the result of redirections.
4678 PH/48 A number of further additions for the benefit of the new test suite,
4679 including a fake gethostbyname() that interfaces to the fake DNS resolver
4682 TF/06 The fix for widen_domains has also been applied to qualify_single and
4683 search_parents which are the other dnslookup options that can cause
4686 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4689 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4691 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4692 service" if it encountered an MX record with an empty target hostname.
4693 The message is now "an MX or SRV record indicated no SMTP service".
4695 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4696 if the DNS of the sending site is misconfigured. This is quite a
4697 common situation. This change restores the behaviour of treating a
4698 helo verification defer as a failure.
4700 PH/51 If self=fail was set on a router, the bounce message did not include the
4701 actual error message.
4707 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4709 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4710 command itself ended in error, the underlying message about the transport
4711 filter timeout was being overwritten with the pipe command error. Now the
4712 underlying error message should be appended to the second error message.
4714 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4716 PH/02 Reduce the amount of output that "make" produces by default. Full output
4717 can still be requested.
4719 PH/03 The warning log line about a condition test deferring for a "warn" verb
4720 was being output only once per connection, rather than after each
4721 occurrence (because it was using the same function as for successful
4722 "warn" verbs). This seems wrong, so I have changed it.
4724 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4725 it should not have, which might have caused a crash in the right
4726 circumstances, but probably never did.
4728 PH/04 Installed a modified version of Tony Finch's patch to make submission
4729 mode fix the return path as well as the Sender: header line, and to
4730 add a /name= option so that you can make the user's friendly name appear
4733 TF/03 Added the control = fakedefer ACL modifier.
4735 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4736 Mark Lowes for thorough testing.
4738 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4740 TK/03 Merged latest SRS patch from Miles Wilton.
4742 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4743 with the definition in sysexits.h (which is #included earlier).
4744 Fortunately, Exim does not actually use EX_OK. The code used to try to
4745 preserve the sysexits.h value, by assuming that macro definitions were
4746 scanned for macro replacements. I have been disabused of this notion,
4747 so now the code just undefines EX_OK before #including unistd.h.
4749 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4750 in the smtp transport. When a block could not be written in a single
4751 write() function, the timeout was being re-applied to each part-write.
4752 This seems wrong - if the receiver was accepting one byte at a time it
4753 would take for ever. The timeout is now adjusted when this happens. It
4754 doesn't have to be particularly precise.
4756 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4757 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4759 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4760 without a domain if the check to <postmaster@domain> fails.
4762 SC/01 Eximstats: added -xls and the ability to specify output files
4763 (patch written by Frank Heydlauf).
4765 SC/02 Eximstats: use FileHandles for outputting results.
4767 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4769 SC/04 Eximstats: fixed display of large numbers with -nvr option
4771 SC/05 Eximstats: fixed merging of reports with empty tables.
4773 SC/06 Eximstats: added the -include_original_destination flag
4775 SC/07 Eximstats: removed tabs and trailing whitespace.
4777 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4779 TK/06 MBOX spool code: Add real "From " MBOX separator line
4780 so the .eml file is really in mbox format (even though
4781 most programs do not really care). Patch from Alex Miller.
4783 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4784 The latter is generated from $received_to and is only set if the
4785 message has one envelope recipient. SA can use these headers,
4786 obviously out-of-the-box. Patch from Alex Miller.
4788 PH/08 The ${def test on a variable was returning false if the variable's
4789 value was "0", contrary to what the specification has always said!
4790 The result should be true unless the variable is empty.
4792 PH/09 The syntax error of a character other than { following "${if
4793 def:variable_name" (after optional whitespace) was not being diagnosed.
4794 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4795 accidental colon was present, for example, could give incorrect results.
4797 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4798 result is used (not including appendfile, where other changes are about
4801 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4802 This involved changing a lot of size variables from int to off_t. It
4803 should work with maildirs and everything.
4805 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4806 spamd dying while we are connected to it.
4808 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4811 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4812 function for BDB 4.3.
4814 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4816 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4817 the sources for PCRE have been re-arranged and more files are now
4820 PH/15 The code I had for printing potentially long long variables in PH/11
4821 above was not the best (it lost precision). The length of off_t variables
4822 is now inspected at build time, and an appropriate printing format (%ld
4823 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4824 to be "long long int" or "long int". This is needed for the internal
4825 formatting function string_vformat().
4827 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4828 the configuration file to be ":syslog", then the script "guesses" where
4829 the logs files are, rather than using the compiled in default. In our
4830 case the guess is not the same as the compiled default, so the script
4831 suddenly stopped working when I started to use syslog. The patch checks
4832 to see if log_file_path is "". If so, it attempts to read it from exim
4833 with no configuration file to get the compiled in version, before it
4834 falls back to the previous guessing code."
4836 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4837 implementing BATV in an Exim configuration. See NewStuff for the gory
4840 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4841 Makefile that are specific to HP-UX.
4843 PH/18 If the "use_postmaster" option was set for a recipient callout together
4844 with the "random" option, the postmaster address was used as the MAIL
4845 FROM address for the random test, but not for the subsequent recipient
4846 test. It is now used for both.
4848 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4849 patch removes a few documentation additions to RFC 3028, because the
4850 latest draft now contains them. It adds the new en;ascii-case comparator
4851 and a new error check for 8bit text in MIME parts. Comparator and
4852 require names are now matched exactly. I enabled the subaddress
4853 extension, but it is not well tested yet (read: it works for me)."
4855 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4856 rework some of the code of TK/09 above to avoid the hardwired use of
4857 "%lld" and "long long". Replaced the call to snprintf() with a call to
4860 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4861 records point to non-existent hosts", "retry timeout exceeded", and
4862 "retry time not reached for any host after a long failure period".
4864 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4865 experimental DomainKeys support:
4867 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4868 (2) On an error such as an illegally used "control", the wrong name for
4869 the control was given.
4871 These problems did NOT occur unless DomainKeys support was compiled.
4873 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4875 PH/24 Added ${if match_ip condition.
4877 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4878 databases so that it will be absolutely obvious if a crash occurs in the
4879 DB library. This is a regular occurrence (often caused by mis-matched
4882 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4883 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4884 picked up on a user's system that detects such things. There doesn't seem
4885 to be a gcc warning option for this - only an attribute that has to be
4886 put on the function's prototype. It seems that in Fedora Core 4 they have
4887 set this on a number of new functions. No doubt there will be more in due
4890 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4891 specify a transport. However, if an address that was verified by such a
4892 router was the subject of a callout, Exim crashed because it tried to
4893 read the rcpt_include_affixes from the non-existent transport. Now it
4894 just assumes that the setting of that option is false. This bug was
4895 introduced by 4.51/PH/31.
4897 PH/28 Changed -d+all to exclude +memory, because that information is very
4898 rarely of interest, but it makes the output a lot bigger. People tend to
4899 do -d+all out of habit.
4901 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4902 code in os-type was giving problems when libc.so lives in lib64, like on
4905 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4906 aren't the modern standard, and it seems that some systems' include files
4907 don't always have them. Exim was already checking for some of the newer
4908 ones like T_AAAA, and defining it itself. I've added checks for all the
4909 record types that Exim uses.
4911 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4912 not automatically generating a new one, as it is supposed to. This
4913 prevented TLS from working. If the file did exist, but contained invalid
4914 data, a new version was generated, as expected. It was only the case of a
4915 non-existent file that was broken.
4917 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4918 with a change in libdomainkeys > 0.64.
4920 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4921 from DNS. If the selector record carries the flag, it now has
4922 precedence over the domain-wide flag.
4924 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4926 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4927 the use of a port name that isn't defined in /etc/services) occurred, the
4928 message was deferred as in a normal delivery, and thus remained on the
4929 spool, instead of being failed because of the mua_wrapper setting. This
4930 is now fixed, and I tidied up some of the mua_wrapper messages at the
4933 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4934 the messages in a hash of arrays rather than using individual hashes.
4935 This is a bit cleaner and results in dramatic memory savings, albeit
4936 at a slight CPU cost.
4938 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4939 as requested by Marc Sherman.
4941 SC/10 Eximstats: added histograms for user specified patterns as requested
4944 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4946 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4947 fopen() in the content-scanning modules that did not already have it.
4953 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4954 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4956 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4958 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4960 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4961 to test Sieve filters that use "vacation".
4963 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4964 that changes the way the GnuTLS parameters are stored in the cache file.
4965 The new format can be generated externally. For backward compatibility,
4966 if the data in the cache doesn't make sense, Exim assumes it has read an
4967 old-format file, and it generates new data and writes a new file. This
4968 means that you can't go back to an older release without removing the
4971 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4972 work if there are any delivery delays because "one_time" forces the
4973 parent to be marked "delivered", so its unseen clone is never tried
4974 again. For this reason, Exim now forbids the simultaneous setting of
4977 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4978 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4979 entry if you want to know the details. The fix, however, neglected to
4980 consider the case when local delivery batching is involved. The test for
4981 "previously delivered" was not happening when checking to see if an
4982 address could be batched with a previous (undelivered) one; under
4983 certain circumstances this could lead to multiple deliveries to the same
4986 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4987 in its include files, and this causes problems building Exim.
4989 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4990 header_syntax) but Exim was just ignoring anything given after a slash.
4991 In particular, this caused confusion with an attempt to use "verify =
4992 reverse_host_lookup/defer_ok". An error is now given when options are
4993 supplied for verify items that do not have them. (Maybe reverse_host_
4994 lookup should have a defer_ok option, but that's a different point.)
4996 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4997 defined by RFC 821) to 2048, because there were problems with some AUTH
4998 commands, and RFC 1869 says the size should be increased for extended
4999 SMTP commands that take arguments.
5001 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5004 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5005 "unknown" error; now it says that the functionality isn't in the binary.
5007 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5008 an address' error message when a string expansion fails (syntax or
5009 whatever). Otherwise the password may appear in the log. Following change
5010 PH/42 below, there is no longer a chance of it appearing in a bounce
5013 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5015 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5016 of its addresses was ever tried. (Bugzilla bug #2.)
5018 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5019 the result incorrectly in the debug output. (It correctly added a newline
5020 to what was transported.)
5022 TF/01 Added $received_time.
5024 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5025 commented out examples of how to interface to a virus scanner and to
5026 SpamAssassin. Also added commented examples of av_scanner and
5027 spamd_address settings.
5029 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5030 and controls are allowed in which ACLs. There were a couple of minor
5031 errors. Some of the entries in the conditions table (which is a table of
5032 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5033 negation of where the condition IS allowed.
5035 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5037 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5038 header file does not have a version number, so I've had to invent a new
5039 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5040 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5041 radiusclient), but it was contributed by a Radius user.
5043 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5044 files or directories, for OpenSSL.
5046 PH/19 When an Exim process that is running as root has to create an Exim log
5047 file, it does so in a subprocess that runs as exim:exim so as to get the
5048 ownership right at creation (otherwise, other Exim processes might see
5049 the file with the wrong ownership). There was no test for failure of this
5050 fork() call, which would lead to the process getting stuck as it waited
5051 for a non-existent subprocess. Forks do occasionally fail when resources
5052 run out. I reviewed all the other calls to fork(); they all seem to check
5055 PH/20 When checking for unexpected SMTP input at connect time (before writing
5056 the banner), Exim was not dealing correctly with a non-positive return
5057 from the read() function. If the client had disconnected by this time,
5058 the result was a log entry for a synchronization error with an empty
5059 string after "input=" when read() returned zero. If read() returned -1
5060 (an event I could not check), uninitialized data bytes were printed.
5061 There were reports of junk text (parts of files, etc) appearing after
5064 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5066 PH/22 Added support for macro redefinition, and (re)definition in between
5067 driver and ACL definitions.
5069 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5070 forgetting to use the resulting value; it was using the unexpanded value.
5072 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5073 hadn't been configured. The fix is from Juergen Kreileder, who
5074 understands it better than I do:
5076 "Here's what I see happening with three configured cyrus_sasl
5077 authenticators configured (plain, login, cram-md5):
5079 On startup auth_cyrus_sasl_init() gets called for each of these.
5080 This means three calls to sasl_listmech() without a specified mech_list.
5081 => SASL tests which mechs of all available mechs actually work
5082 => three warnings about OTP not working
5083 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5085 With the patch, sasl_listmech() also gets called three times. But now
5086 SASL's mech_list option is set to the server_mech specified in the the
5087 authenticator. Or in other words, the answer from sasl_listmech()
5088 gets limited to just the mech you're testing for (which is different
5090 => the return list contains just 'plain' or 'login', 'cram-md5' or
5091 nothing depending on the value of ob->server_mech.
5093 I've just tested the patch: Authentication still works fine,
5094 unavailable mechs specified in the exim configuration are still
5095 caught, and the auth.log warnings about OTP are gone."
5097 PH/25 When debugging is enabled, the contents of the command line are added
5098 to the debugging output, even when log_selector=+arguments is not
5101 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5102 answer is "GNU", and only if the return is "GNU/something" is the answer
5105 PH/27 $acl_verify_message is now set immediately after the failure of a
5106 verification in an ACL, and so is available in subsequent modifiers. In
5107 particular, the message can be preserved by coding like this:
5109 warn !verify = sender
5110 set acl_m0 = $acl_verify_message
5112 Previously, $acl_verify_message was set only while expanding "message"
5113 and "log_message" when a very denied access.
5115 PH/28 Modified OS/os.c-Linux with
5117 -#ifndef OS_LOAD_AVERAGE
5118 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5120 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5121 nomenclature these days.)
5123 PH/29 Installed patch from the Sieve maintainer that adds the options
5124 sieve_useraddress and sieve_subaddress to the redirect router.
5126 PH/30 In these circumstances:
5127 . Two addresses routed to the same list of hosts;
5128 . First host does not offer TLS;
5129 . First host accepts first address;
5130 . First host gives temporary error to second address;
5131 . Second host offers TLS and a TLS session is established;
5132 . Second host accepts second address.
5133 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5134 and peerdn, if requested) that were in fact used only for the second
5137 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5138 attention to any local part prefix or suffix that was matched by the
5139 router that accepted the address. It now behaves in the same way as it
5140 does for delivery: the affixes are removed from the local part unless
5141 rcpt_include_affixes is set on the transport.
5143 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5144 timeout during the DATA phase of an incoming message.
5146 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5147 applied a patch sanctioned by the Sieve maintainer.
5149 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5150 the uid or gid is negative. A case of a negative gid caused this to be
5151 noticed. The fix allows for either to be negative.
5153 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5154 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5157 PH/36 The change PH/12 above was broken. Fixed it.
5159 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5160 the grounds that routing the same address twice would always produce the
5161 same answer. This might have been true once, but it is certainly no
5162 longer true now. Routing a child address may depend on the previous
5163 routing that produced that child. Some complicated redirection strategies
5164 went wrong when messages had multiple recipients, and made Exim's
5165 behaviour dependent on the order in which the addresses were given.
5167 I have moved the duplicate checking until after the routing is complete.
5168 Exim scans the addresses that are assigned to local and remote
5169 transports, and removes any duplicates. This means that more work will be
5170 done, as duplicates will always all be routed, but duplicates are
5171 presumably rare, so I don't expect this is of any significance.
5173 For deliveries to pipes, files, and autoreplies, the duplicate checking
5174 still happens during the routing process, since they are not going to be
5177 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5178 It corrects a timeout issue with spamd. This is Ian's comment: "The
5179 background is that sometimes spamd either never reads data from a
5180 connection it has accepted, or it never writes response data. The exiscan
5181 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5182 blindly assumes that writes won't block so it may never time out."
5184 PH/39 Allow G after quota size as well as K and M.
5186 PH/40 The value set for $authenticated_id in an authenticator may not contain
5187 binary zeroes or newlines because the value is written to log lines and
5188 to spool files. There was no check on this. Now the value is run through
5189 the string_printing() function so that such characters are converted to
5190 printable escape sequences.
5192 PH/41 $message_linecount is a new variable that contains the total number of
5193 lines in the message. Compare $body_linecount, which is the count for the
5196 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5197 bounce and delay warning messages, except in certain special cases, which
5200 (a) An SMTP error message from a remote host;
5201 (b) A message specified in a :fail: redirection;
5202 (c) A message specified in a "fail" command in a system filter;
5203 (d) A message specified in a FAIL return from the queryprogram router;
5204 (e) A message specified by the cannot_route_message router option.
5206 In these cases only, Exim does include the error details in bounce and
5207 warning messages. There are also a few cases where bland messages such
5208 as "unrouteable address" or "local delivery error" are given.
5210 PH/43 $value is now also set for the "else" part of a ${run expansion.
5212 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5213 being worked on, but at least Exim now implements the latest version to
5216 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5217 process to complete was treated as a delivery failure, a timeout while
5218 writing the message to the pipe was logged, but erroneously treated as a
5219 successful delivery. Such timeouts include transport filter timeouts. For
5220 consistency with the overall process timeout, these timeouts are now
5221 treated as errors, giving rise to delivery failures by default. However,
5222 there is now a new Boolean option for the pipe transport called
5223 timeout_defer, which, if set TRUE, converts the failures into defers for
5224 both kinds of timeout. A transport filter timeout is now identified in
5227 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5228 systems where "make" and "gmake" are different, calling "gmake" at top
5229 level broke things. I've arranged for the value of $(MAKE) to be passed
5230 from the Makefile to this script so that it can call the same version of
5234 A note about Exim versions 4.44 and 4.50
5235 ----------------------------------------
5237 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5238 changes of various kinds. As a consequence, a big documentation update was
5239 needed. This delayed the release for rather longer than seemed good, especially
5240 in the light of a couple of (minor) security issues. Therefore, the changes
5241 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5242 release. So 4.44 and 4.50 are in effect two different branches that both start
5245 I have left the 4.50 change log unchanged; it contains all the changes since
5246 4.43. The change log for 4.44 is below; many of its items are identical to
5247 those for 4.50. This seems to be the most sensible way to preserve the
5248 historical information.
5254 1. Minor wording change to the doc/README.SIEVE file.
5256 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5257 computation of the current number of files was incorrect.
5259 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5260 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5263 4. Give more explanation in the error message when the command for a transport
5264 filter fails to execute.
5266 5. There are several places where Exim runs a non-Exim command in a
5267 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5268 was being done only for the command run by the queryprogram router. It is
5269 now done for all such subprocesses. The other cases are: ${run, transport
5270 filters, and the commands run by the lmtp and pipe transports.
5272 6. Added CONFIGURE_GROUP build-time option.
5274 7. Some older OS have a limit of 256 on the maximum number of file
5275 descriptors. Exim was using setrlimit() to set 1000 as a large value
5276 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5277 systems. I've change it so that if it can't get 1000, it tries for 256.
5279 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5280 was an oversight, and furthermore, ever since the addition of extra
5281 controls (e.g. 4.43/32), the checks on when to allow different forms of
5282 "control" were broken. There should now be diagnostics for all cases when a
5283 control that does not make sense is encountered.
5285 9. Added the /retain_sender option to "control=submission".
5287 10. $recipients is now available in the predata ACL (oversight).
5289 11. Tidy the search cache before the fork to do a delivery from a message
5290 received from the command line. Otherwise the child will trigger a lookup
5291 failure and thereby defer the delivery if it tries to use (for example) a
5292 cached ldap connection that the parent has called unbind on.
5294 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5295 of $address_data from the recipient verification was clobbered by the
5296 sender verification.
5298 13. The value of address_data from a sender verification is now available in
5299 $sender_address_data in subsequent conditions in the ACL statement.
5301 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5303 15. Added a new option "connect=<time>" to callout options, to set a different
5306 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5307 was its contents. (It was OK if the option was not defined at all.)
5309 17. A "Completed" log line is now written for messages that are removed from
5310 the spool by the -Mrm option.
5312 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5313 information about exactly what failed.
5315 19. Added -dd to debug only the daemon process.
5317 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5318 handles timeouts, both on the server side and network timeouts. Renamed the
5319 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5321 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5322 It is now set to "smtps".
5324 22. $host_address is now set to the target address during the checking of
5325 ignore_target_hosts.
5327 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5328 being passed; this would have caused $sender_host_name to have been used if
5329 matching the list had actually called for a host name (not very likely,
5330 since this list is usually IP addresses). A host name is now passed as
5333 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5334 code that specifies a non-restarting handler (typically sigaction() in
5335 modern systems) in an attempt to fix a rare and obscure crash bug.
5337 25. Narrowed the window for a race in the daemon that could cause it to ignore
5338 SIGCHLD signals. This is not a major problem, because they are used only to
5339 wake it up if nothing else does.
5341 26. A malformed maildirsize file could cause Exim to calculate negative values
5342 for the mailbox size or file count. Odd effects could occur as a result.
5343 The maildirsize information is now recalculated if the size or filecount
5346 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5347 support for a long time. Removed HAVE_SYS_VFS_H.
5349 28. Installed the latest version of exipick from John Jetmore.
5351 29. In an address list, if the pattern was not a regular expression, an empty
5352 subject address (from a bounce message) matched only if the pattern was an
5353 empty string. Non-empty patterns were not even tested. This was the wrong
5354 because it is perfectly reasonable to use an empty address as part of a
5355 database query. An empty address is now tested by patterns that are
5356 lookups. However, all the other forms of pattern expect the subject to
5357 contain a local part and a domain, and therefore, for them, an empty
5358 address still always fails if the pattern is not itself empty.
5360 30. Exim went into a mad DNS loop when attempting to do a callout where the
5361 host was specified on an smtp transport, and looking it up yielded more
5362 than one IP address.
5364 31. Re-factored the code for checking spool and log partition space into a
5365 function that finds that data and another that does the check. The former
5366 is then used to implement four new variables: $spool_space, $log_space,
5367 $spool_inodes, and $log_inodes.
5369 32. The RFC2047 encoding function was originally intended for short strings
5370 such as real names; it was not keeping to the 75-character limit for
5371 encoded words that the RFC imposes. It now respects the limit, and
5372 generates multiple encoded words if necessary. To be on the safe side, I
5373 have increased the buffer size for the ${rfc2047: expansion operator from
5376 33. It is now permitted to omit both strings after an "if" condition; if the
5377 condition is true, the result is "true". As before, when the second string
5378 is omitted, a false condition yields an empty string. This makes it less
5379 cumbersome to write custom ACL and router conditions.
5381 34. Failure to deliver a bounce message always caused it to be frozen, even if
5382 there was an errors_to setting on the router. The errors_to setting is now
5385 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5386 canonical form (fully expanded) before being placed in
5387 $sender_host_address.
5389 36. The table in the code that translates DNS record types into text (T_A to
5390 "A" for instance) was missing entries for NS and CNAME. It is just possible
5391 that this could have caused confusion if both these types were looked up
5392 for the same domain, because the text type is used as part of Exim's
5393 per-process caching. But the chance of anyone hitting this buglet seems
5396 37. The dnsdb lookup has been extended in a number of ways.
5398 (1) There is a new type, "zns", which walks up the domain tree until it
5399 finds some nameserver records. It should be used with care.
5401 (2) There is a new type, "mxh", which is like "mx" except that it returns
5402 just the host names, not the priorities.
5404 (3) It is now possible to give a list of domains (or IP addresses) to be
5405 looked up. The behaviour when one of the lookups defers can be
5406 controlled by a keyword.
5408 (4) It is now possible to specify the separator character for use when
5409 multiple records are returned.
5411 38. The dnslists ACL condition has been extended: it is now possible to supply
5412 a list of IP addresses and/or domains to be looked up in a particular DNS
5415 39. Added log_selector=+queue_time_overall.
5417 40. When running the queue in the test harness, wait just a tad after forking a
5418 delivery process, to get repeatability of debugging output.
5420 41. Include certificate and key file names in error message when GnuTLS fails
5421 to set them up, because the GnuTLS error message doesn't include the name
5422 of the failing file when there is a problem reading it.
5424 42. Allow both -bf and -bF in the same test run.
5426 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5428 44. The "Exiscan patch" is now merged into the mainline Exim source.
5430 45. Sometimes the final signoff response after QUIT could fail to get
5431 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5432 < 0 before doing a fflush(). This bug looks as though it goes back to the
5433 introduction of TLS in release 3.20, but "sometimes" must have been rare
5434 because the tests only now provoked it.
5436 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5437 (this can affect the format of dates).
5439 47. exim_tidydb, when checking for the continued existence of a message for
5440 which it has found a message-specific retry record, was not finding
5441 messages that were in split spool directories. Consequently, it was
5442 deleting retry records that should have stayed in existence.
5444 48. Steve fixed some bugs in eximstats.
5446 49. The SPA authentication driver was not abandoning authentication and moving
5447 on to the next authenticator when an expansion was forced to fail,
5448 contradicting the general specification for all authenticators. Instead it
5449 was generating a temporary error. It now behaves as specified.
5451 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5452 (the order specifies the preference for clients). The order is now AES256,
5453 AES128, 3DES, ARCFOUR128.
5455 51. Small patch to Sieve code - explicitly set From: when generating an
5458 52. Exim crashed if a remote delivery caused a very long error message to be
5459 recorded - for instance if somebody sent an entire SpamAssassin report back
5460 as a large number of 550 error lines. This bug was coincidentally fixed by
5461 increasing the size of one of Exim's internal buffers (big_buffer) that
5462 happened as part of the Exiscan merge. However, to be on the safe side, I
5463 have made the code more robust (and fixed the comments that describe what
5466 53. Now that there can be additional text after "Completed" in log lines (if
5467 the queue_time_overall log selector is set), a one-byte patch to exigrep
5468 was needed to allow it to recognize "Completed" as not the last thing in
5471 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5472 patch that reportedly fixes this has been added. I am not expert enough to
5473 create a test for it. This is what the patch creator wrote:
5475 "I found a little strange behaviour of ldap code when working with
5476 Windows 2003 AD Domain, where users was placed in more than one
5477 Organization Units. When I tried to give exim partial DN, the exit code
5478 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5479 But simultaneously result of request was absolutely normal ldap result,
5480 so I produce this patch..."
5482 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5483 REFERENCE, so I have modified the code to exclude the patch when that macro
5486 55. Some experimental protocols are using DNS PTR records for new purposes. The
5487 keys for these records are domain names, not reversed IP addresses. The
5488 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5489 leaves it alone. Component reversal etc. now happens only for IP addresses.
5492 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5494 57. Double the size of the debug message buffer (to 2048) so that more of very
5495 long debug lines gets shown.
5497 58. The exicyclog utility now does better if the number of log files to keep
5498 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5500 59. Two changes related to the smtp_active_hostname option:
5502 (1) $smtp_active_hostname is now available as a variable.
5503 (2) The default for smtp_banner uses $smtp_active_hostname instead
5504 of $primary_hostname.
5506 60. The host_aton() function is supposed to be passed a string that is known
5507 to be a valid IP address. However, in the case of IPv6 addresses, it was
5508 not checking this. This is a hostage to fortune. Exim now panics and dies
5509 if the condition is not met. A case was found where this could be provoked
5510 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5511 components; fortuitously, this particular loophole had already been fixed
5512 by change 4.50/55 above.
5514 If there are any other similar loopholes, the new check in host_aton()
5515 itself should stop them being exploited. The report I received stated that
5516 data on the command line could provoke the exploit when Exim was running as
5517 exim, but did not say which command line option was involved. All I could
5518 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5519 running as the user.
5522 61. There was a buffer overflow vulnerability in the SPA authentication code
5523 (which came originally from the Samba project). I have added a test to the
5524 spa_base64_to_bits() function which I hope fixes it.
5527 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5528 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5530 63. The daemon start-up calls getloadavg() while still root for those OS that
5531 need the first call to be done as root, but it missed one case: when
5532 deliver_queue_load_max is set with deliver_drop_privilege. This is
5533 necessary for the benefit of the queue runner, because there is no re-exec
5534 when deliver_drop_privilege is set.
5536 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5537 This has been fixed.
5539 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5540 was in use, was not putting the data itself into the right store pool;
5541 consequently, it could be overwritten for a subsequent message in the same
5542 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5545 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5547 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5548 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5549 the function were treating the return as a boolean value, which happened to
5550 work because 0=false and not-0=true, but is not correct code.
5552 68. The host_aton() function was not handling scoped IPv6 addresses (those
5553 with, for example, "%eth0" on the end) correctly.
5555 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5556 negated items (that is, ~something) in unsigned ints. Some compilers
5557 apparently mutter when there is no cast.
5559 70. If an address verification called from an ACL failed, and did not produce a
5560 user-specific message (i.e. there was only a "system" message), nothing was
5561 put in $acl_verify_message. In this situation, it now puts the system
5564 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5565 session; change 4.31/43 added the unwanted input to the log line - except
5566 that it did not do this in the start of session case. It now does.
5568 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5569 This is wrong and can cause the other end to generate a synchronization
5570 error if it is another Exim or anything else that does the synchronization
5571 check. A QUIT command is no longer sent after a timeout.
5573 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5574 during host lookups.
5576 74. The defer_ok option of callout verification was not working if it was used
5577 when verifying addresses in header lines, that is, for this case:
5579 verify = header_sender/callout=defer_ok
5581 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5582 those file descriptors could be used for SMTP connections. If anything
5583 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5584 could be sent to the SMTP client, causing chaos. The daemon now opens
5585 stdin, stdout, and stderr to /dev/null when it puts itself into the
5588 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5589 log by default. The user can override this with suitable Perl magic.
5591 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5592 the log message when discard triggers, was not working for the DATA ACL or
5593 for the non-SMTP ACL.
5595 78. Error message wording change in sieve.c.
5597 79. If smtp_accept_max_per_host was set, the number of connections could be
5598 restricted to fewer than expected, because the daemon was trying to set up
5599 a new connection before checking whether the processes handling previous
5600 connections had finished. The check for completed processes is now done
5601 earlier. On busy systems, this bug wouldn't be noticed because something
5602 else would have woken the daemon, and it would have reaped the completed
5605 80. If a message was submitted locally by a user whose login name contained one
5606 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5607 It caused a spool format error. I have fixed the spool reading code. A
5608 related problem was that the "from" clause in the Received: line became
5609 illegal because of the space(s). It is now covered by ${quote_local_part.
5611 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5614 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5616 83. Patch from Sieve maintainer to fix unterminated string problem in
5617 "vacation" handling.
5619 84. Some minor changes to the Linux configuration files to help with other
5620 OS variants using glibc.
5622 85. One more patch for Sieve to update vacation handling to latest spec.
5625 ----------------------------------------------------
5626 See the note above about the 4.44 and 4.50 releases.
5627 ----------------------------------------------------
5633 1. Change 4.43/35 introduced a bug that caused file counts to be
5634 incorrectly computed when quota_filecount was set in an appendfile
5637 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5638 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5641 3. Give more explanation in the error message when the command for a transport
5642 filter fails to execute.
5644 4. There are several places where Exim runs a non-Exim command in a
5645 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5646 was being done only for the command run by the queryprogram router. It is
5647 now done for all such subprocesses. The other cases are: ${run, transport
5648 filters, and the commands run by the lmtp and pipe transports.
5650 5. Some older OS have a limit of 256 on the maximum number of file
5651 descriptors. Exim was using setrlimit() to set 1000 as a large value
5652 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5653 systems. I've change it so that if it can't get 1000, it tries for 256.
5655 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5656 was an oversight, and furthermore, ever since the addition of extra
5657 controls (e.g. 4.43/32), the checks on when to allow different forms of
5658 "control" were broken. There should now be diagnostics for all cases when a
5659 control that does not make sense is encountered.
5661 7. $recipients is now available in the predata ACL (oversight).
5663 8. Tidy the search cache before the fork to do a delivery from a message
5664 received from the command line. Otherwise the child will trigger a lookup
5665 failure and thereby defer the delivery if it tries to use (for example) a
5666 cached ldap connection that the parent has called unbind on.
5668 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5669 of $address_data from the recipient verification was clobbered by the
5670 sender verification.
5672 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5673 was its contents. (It was OK if the option was not defined at all.)
5675 11. A "Completed" log line is now written for messages that are removed from
5676 the spool by the -Mrm option.
5678 12. $host_address is now set to the target address during the checking of
5679 ignore_target_hosts.
5681 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5682 being passed; this would have caused $sender_host_name to have been used if
5683 matching the list had actually called for a host name (not very likely,
5684 since this list is usually IP addresses). A host name is now passed as
5687 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5688 code that specifies a non-restarting handler (typically sigaction() in
5689 modern systems) in an attempt to fix a rare and obscure crash bug.
5691 15. Narrowed the window for a race in the daemon that could cause it to ignore
5692 SIGCHLD signals. This is not a major problem, because they are used only to
5693 wake it up if nothing else does.
5695 16. A malformed maildirsize file could cause Exim to calculate negative values
5696 for the mailbox size or file count. Odd effects could occur as a result.
5697 The maildirsize information is now recalculated if the size or filecount
5700 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5701 support for a long time. Removed HAVE_SYS_VFS_H.
5703 18. Updated exipick to current release from John Jetmore.
5705 19. Allow an empty sender to be matched against a lookup in an address list.
5706 Previously the only cases considered were a regular expression, or an
5709 20. Exim went into a mad DNS lookup loop when doing a callout where the
5710 host was specified on the transport, if the DNS lookup yielded more than
5713 21. The RFC2047 encoding function was originally intended for short strings
5714 such as real names; it was not keeping to the 75-character limit for
5715 encoded words that the RFC imposes. It now respects the limit, and
5716 generates multiple encoded words if necessary. To be on the safe side, I
5717 have increased the buffer size for the ${rfc2047: expansion operator from
5720 22. Failure to deliver a bounce message always caused it to be frozen, even if
5721 there was an errors_to setting on the router. The errors_to setting is now
5724 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5725 canonical form (fully expanded) before being placed in
5726 $sender_host_address.
5728 24. Updated eximstats to version 1.33
5730 25. Include certificate and key file names in error message when GnuTLS fails
5731 to set them up, because the GnuTLS error message doesn't include the name
5732 of the failing file when there is a problem reading it.
5734 26. Expand error message when OpenSSL has problems setting up cert/key files.
5737 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5738 (this can affect the format of dates).
5740 28. exim_tidydb, when checking for the continued existence of a message for
5741 which it has found a message-specific retry record, was not finding
5742 messages that were in split spool directories. Consequently, it was
5743 deleting retry records that should have stayed in existence.
5745 29. eximstats updated to version 1.35
5746 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5747 1.35 - bugfix such that pie charts by volume are generated correctly
5749 30. The SPA authentication driver was not abandoning authentication and moving
5750 on to the next authenticator when an expansion was forced to fail,
5751 contradicting the general specification for all authenticators. Instead it
5752 was generating a temporary error. It now behaves as specified.
5754 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5755 (the order specifies the preference for clients). The order is now AES256,
5756 AES128, 3DES, ARCFOUR128.
5758 31. Small patch to Sieve code - explicitly set From: when generating an
5761 32. Exim crashed if a remote delivery caused a very long error message to be
5762 recorded - for instance if somebody sent an entire SpamAssassin report back
5763 as a large number of 550 error lines. This bug was coincidentally fixed by
5764 increasing the size of one of Exim's internal buffers (big_buffer) that
5765 happened as part of the Exiscan merge. However, to be on the safe side, I
5766 have made the code more robust (and fixed the comments that describe what
5769 33. Some experimental protocols are using DNS PTR records for new purposes. The
5770 keys for these records are domain names, not reversed IP addresses. The
5771 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5772 leaves it alone. Component reversal etc. now happens only for IP addresses.
5775 34. The host_aton() function is supposed to be passed a string that is known
5776 to be a valid IP address. However, in the case of IPv6 addresses, it was
5777 not checking this. This is a hostage to fortune. Exim now panics and dies
5778 if the condition is not met. A case was found where this could be provoked
5779 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5780 components; fortuitously, this particular loophole had already been fixed
5781 by change 4.50/55 or 4.44/33 above.
5783 If there are any other similar loopholes, the new check in host_aton()
5784 itself should stop them being exploited. The report I received stated that
5785 data on the command line could provoke the exploit when Exim was running as
5786 exim, but did not say which command line option was involved. All I could
5787 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5788 running as the user.
5791 35. There was a buffer overflow vulnerability in the SPA authentication code
5792 (which came originally from the Samba project). I have added a test to the
5793 spa_base64_to_bits() function which I hope fixes it.
5796 36. The daemon start-up calls getloadavg() while still root for those OS that
5797 need the first call to be done as root, but it missed one case: when
5798 deliver_queue_load_max is set with deliver_drop_privilege. This is
5799 necessary for the benefit of the queue runner, because there is no re-exec
5800 when deliver_drop_privilege is set.
5802 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5803 was in use, was not putting the data itself into the right store pool;
5804 consequently, it could be overwritten for a subsequent message in the same
5805 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5808 38. Sometimes the final signoff response after QUIT could fail to get
5809 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5810 < 0 before doing a fflush(). This bug looks as though it goes back to the
5811 introduction of TLS in release 3.20, but "sometimes" must have been rare
5812 because the tests only now provoked it.
5818 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5819 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5820 Now it returns an integer. A number of calls were still expecting a T/F
5821 return. Fortuitously, in all cases, the tests worked in OK situations,
5822 which is the norm. However, things would have gone wrong on any write
5823 failures on the smtp file descriptor. This function is used when sending
5824 messages over SMTP and also when doing verify callouts.
5826 2. When Exim is called to do synchronous delivery of a locally submitted
5827 message (the -odf or -odi options), it no longer closes stderr before doing
5830 3. Implemented the mua_wrapper option.
5832 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5834 5. Implemented the functions header_remove(), header_testname(),
5835 header_add_at_position(), and receive_remove_recipient(), and exported them
5838 6. If an ACL "warn" statement specified the addition of headers, Exim already
5839 inserted X-ACL-Warn: at the start if there was no header name. However, it
5840 was not making this test for the second and subsequent header lines if
5841 there were newlines in the string. This meant that an invalid header could
5842 be inserted if Exim was badly configured.
5844 7. Allow an ACL "warn" statement to add header lines at the start or after all
5845 the Received: headers, as well as at the end.
5847 8. Added the rcpt_4xx retry error code.
5849 9. Added postmaster_mailfrom=xxx to callout verification option.
5851 10. Added mailfrom=xxxx to the callout verification option, for verify=
5854 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5855 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5857 12. Inserted some casts to stop certain compilers warning when using pointer
5858 differences as field lengths or precisions in printf-type calls (mostly
5859 affecting debugging statements).
5861 13. Added optional readline() support for -be (dynamically loaded).
5863 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5864 same clock tick as a message's arrival, so that its received time was the
5865 same as the "first fail" time on the retry record, and that message
5866 remained on the queue past the ultimate address timeout, every queue runner
5867 would try a delivery (because it was past the ultimate address timeout) but
5868 after another failure, the ultimate address timeout, which should have then
5869 bounced the address, did not kick in. This was a "< instead of <=" error;
5870 in most cases the first failure would have been in the next clock tick
5871 after the received time, and all would be well.
5873 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5874 being recognized when the domain list was tested by the match_domain
5875 condition in an expansion string.
5877 16. Added the ${str2b64: operator.
5879 17. Exim was always calling setrlimit() to set a large limit for the number of
5880 processes, without checking whether the existing limit was already
5881 adequate. (It did check for the limit on file descriptors.) Furthermore,
5882 errors from getrlimit() and setrlimit() were being ignored. Now they are
5883 logged to the main and panic logs, but Exim does carry on, to try to do its
5884 job under whatever limits there are.
5886 18. Imported PCRE 5.0.
5888 19. Trivial typo in log message " temporarily refused connection" (the leading
5891 20. If the log selector return_path_on_delivery was set and an address was
5892 redirected to /dev/null, the delivery process crashed because it assumed
5893 that a return path would always be set for a "successful" delivery. In this
5894 case, the whole delivery is bypassed as an optimization, and therefore no
5897 21. Internal re-arrangement: the function for sending a challenge and reading
5898 a response while authentication was assuming a zero-terminated challenge
5899 string. It's now changed to take a pointer and a length, to allow for
5900 binary data in such strings.
5902 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5904 23. Exim was not respecting finduser_retries when seeking the login of the
5905 uid under which it was called; it was always trying 10 times. (The default
5906 setting of finduser_retries is zero.) Also, it was sleeping after the final
5907 failure, which is pointless.
5909 24. Implemented tls_on_connect_ports.
5911 25. Implemented acl_smtp_predata.
5913 26. If the domain in control=submission is set empty, Exim assumes that the
5914 authenticated id is a complete email address when it generates From: or
5915 Sender: header lines.
5917 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5918 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5919 chown and chgrp in /bin and hostname in /usr/bin.
5921 28. Exim was keeping the "process log" file open after each use, just as it
5922 does for the main log. This opens the possibility of it remaining open for
5923 long periods when the USR1 signal hits a daemon. Occasional processlog
5924 errors were reported, that could have been caused by this. Anyway, it seems
5925 much more sensible not to leave this file open at all, so that is what now
5928 29. The long-running daemon process does not normally write to the log once it
5929 has entered its main loop, and it closes the log before doing so. This is
5930 so that log files can straightforwardly be renamed and moved. However,
5931 there are a couple of unusual error situations where the daemon does write
5932 log entries, and I had neglected to close the log afterwards.
5934 30. The text of an SMTP error response that was received during a remote
5935 delivery was being truncated at 512 bytes. This is too short for some of
5936 the long messages that one sometimes sees. I've increased the limit to
5939 31. It is now possible to make retry rules that apply only when a message has a
5940 specific sender, in particular, an empty sender.
5942 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5943 it possible to be selective about when SMTP synchronization is enforced.
5945 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5947 32. Implemented hosts_connection_nolog.
5949 33. Added an ACL for QUIT.
5951 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5954 35. Added mailbox_size and mailbox_filecount to appendfile.
5956 36. Added control = no_multiline_responses to ACLs.
5958 37. There was a bug in the logic of the code that waits for the clock to tick
5959 in the case where the clock went backwards by a substantial amount such
5960 that the microsecond fraction of "now" was more than the microsecond
5961 fraction of "then" (but the whole seconds number was less).
5963 38. Added support for the libradius Radius client library this is found on
5964 FreeBSD (previously only the radiusclient library was supported).
5970 1. When certain lookups returned multiple values in the form name=value, the
5971 quoting of the values was not always being done properly. Specifically:
5972 (a) If the value started with a double quote, but contained no whitespace,
5974 (b) If the value contained whitespace other than a space character (i.e.
5975 tabs or newlines or carriage returns) it was not quoted.
5976 This fix has been applied to the mysql and pgsql lookups by writing a
5977 separate quoting function and calling it from the lookup code. The fix
5978 should probably also be applied to nisplus, ibase and oracle lookups, but
5979 since I cannot test any of those, I have not disturbed their existing code.
5981 2. A hit in the callout cache for a specific address caused a log line with no
5982 reason for rejecting RCPT. Now it says "Previous (cached) callout
5983 verification failure".
5985 3. There was an off-by-one bug in the queryprogram router. An over-long
5986 return line was truncated at 256 instead of 255 characters, thereby
5987 overflowing its buffer with the terminating zero. As well as fixing this, I
5988 have increased the buffer size to 1024 (and made a note to document this).
5990 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5991 when Exim is waiting for an SMTP response from a remote server, Exim
5992 restarts its select() call on the socket, thereby resetting its timeout.
5993 This is not a problem when such interrupts are rare. Somebody set up a cron
5994 job to run exiwhat every 2 minutes, which is less than the normal select()
5995 timeout (5 or 10 minutes). This meant that the select() timeout never
5996 kicked in because it was always reset. I have fixed this by comparing the
5997 time when an interrupt arrives with the time at the start of the first call
5998 to select(). If more time than the timeout has elapsed, the interrupt is
5999 treated as a timeout.
6001 5. Some internal re-factoring in preparation for the addition of Sieve
6002 extensions (by MH). In particular, the "personal" test is moved to a
6003 separate function, and given an option for scanning Cc: and Bcc: (which is
6004 not set for Exim filters).
6006 6. When Exim created an email address using the login of the caller as the
6007 local part (e.g. when creating a From: or Sender: header line), it was not
6008 quoting the local part when it contained special characters such as @.
6010 7. Installed new OpenBSD configuration files.
6012 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6013 try to make them clearer.
6015 9. Callout options, other than the timeout value, were being ignored when
6016 verifying sender addresses in header lines. For example, when using
6018 verify = header_sender/callout=no_cache
6020 the cache was (incorrectly) being used.
6022 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6023 only the Cygwin environment.
6025 11. When return_path_on_delivery was set as a log selector, if different remote
6026 addresses in the same message used different return paths and parallel
6027 remote delivery occurred, the wrong values would sometimes be logged.
6028 (Whenever a remote delivery process finished, the return path value from
6029 the most recently started remote delivery process was logged.)
6031 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6032 lines when AUTH and/or TLS are in use. This is the "received protocol"
6033 field. Exim used to use "asmtp" for authenticated SMTP, without any
6034 indication (in the protocol name) for TLS use. Now it follows the RFC and
6035 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6036 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6037 names appear in log lines as well as in Received: header lines.
6039 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6040 extensions, and comparison tests, and to fix some bugs.
6042 14. Changes to the "personal" filter test:
6044 (1) The test was buggy in that it was just doing the equivalent of
6045 "contains" tests on header lines. For example, if a user's address was
6046 anne@some.where, the "personal" test would incorrectly be true for
6048 To: susanne@some.where
6050 This test is now done by extracting each address from the header in turn,
6051 and checking the entire address. Other tests that are part of "personal"
6052 are now done using regular expressions (for example, to check local parts
6053 of addresses in From: header lines).
6055 (2) The list of non-personal local parts in From: addresses has been
6056 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6057 taken from the Sieve specification recommendations.
6059 (3) If the message contains any header line starting with "List-" it is
6060 treated as non-personal.
6062 (4) The test for "circular" in the Subject: header line has been removed
6063 because it now seems ill-conceived.
6065 15. Minor typos in src/EDITME comments corrected.
6067 16. Installed latest exipick from John Jetmore.
6069 17. If headers_add on a router specified a text string that was too long for
6070 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6071 of string_sprintf() is now avoided.
6073 18. $message_body_size was not set (it was always zero) when running the DATA
6074 ACL and the local_scan() function.
6076 19. For the "mail" command in an Exim filter, no default was being set for
6077 the once_repeat time, causing a random time value to be used if "once" was
6078 specified. (If the value happened to be <= 0, no repeat happened.) The
6079 default is now 0s, meaning "never repeat". The "vacation" command was OK
6080 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6081 (I found it when inspecting the code).
6083 20. There is now an overall timeout for performing a callout verification. It
6084 defaults to 4 times the callout timeout, which applies to individual SMTP
6085 commands during the callout. The overall timeout applies when there is more
6086 than one host that can be tried. The timeout is checked before trying the
6087 next host. This prevents very long delays if there are a large number of
6088 hosts and all are timing out (e.g. when the network connections are timing
6089 out). The value of the overall timeout can be changed by specifying an
6090 additional sub-option for "callout", called "maxwait". For example:
6092 verify = sender/callout=5s,maxwait=20s
6094 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6095 to the end before writing, but this should make it even safer).
6097 22. Exim was forgetting that it had advertised PIPELINING for the second and
6098 subsequent messages on an SMTP connection. It was also not resetting its
6099 memory on STARTTLS and an internal HELO.
6101 23. When Exim logs an SMTP synchronization error within a session, it now
6102 records whether PIPELINING has been advertised or not.
6104 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6105 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6106 rather than long int.
6108 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6110 26. Added the never_mail option to autoreply.
6116 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6117 crash if the getsockname() call failed; this can happen if a connection is
6118 closed very soon after it is established. The problem was simply in the
6119 order in which certain operations were done, causing Exim to try to write
6120 to the SMTP stream before it had set up the file descriptor. The bug has
6121 been fixed by making things happen in the correct order.
6127 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6128 before the connection was closed, thus losing the rejection response.
6130 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6131 some early Solaris releases, but causes trouble in current releases where
6132 socklen_t is defined.
6134 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6137 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6140 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6141 that releasing the top of it at the end releases what was used for sub-
6142 expansions (unless the block got too big). However, discard this block if
6143 the first thing is a variable or header, so that we can use its block when
6144 it is dynamic (useful for very large $message_headers, for example).
6146 6. Lookups now cache *every* query, not just the most recent. A new, separate
6147 store pool is used for this. It can be recovered when all lookup caches are
6148 flushed. Lookups now release memory at the end of their result strings.
6149 This has involved some general refactoring of the lookup sources.
6151 7. Some code has been added to the store_xxx() functions to reduce the amount
6152 of flapping under certain conditions.
6154 8. log_incoming_interface used to affect only the <= reception log lines. Now
6155 it causes the local interface and port to be added to several more SMTP log
6156 lines, for example "SMTP connection from", and rejection lines.
6158 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6160 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6162 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6163 could be overwritten at the end of the current message (or the start of a
6164 new message if it was set in a HELO ACL). The value is now preserved for
6165 the duration of the SMTP connection.
6167 12. If a transport had a headers_rewrite setting, and a matching header line
6168 contained an unqualified address, that address was qualified, even if it
6169 did not match any rewriting rules. The underlying bug was that the values
6170 of the flags that permit the existence of unqualified sender and recipient
6171 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6172 non-local messages, and by -bnq for local messages) were not being
6173 preserved with the message after it was received.
6175 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6176 "next input=" as part of the text comprising the host identity instead of
6177 the correct text. The code was using the same buffer for two different
6178 strings. However, depending on which order the printing function evaluated
6179 its arguments, the bug did not always show up. Under Linux, for example, my
6180 test suite worked just fine.
6182 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6183 doesn't work with some older versions of Perl. It has been changed to "my",
6184 which in any case is probably the better facility to use.
6186 15. A really picky compiler found some instances of statements for creating
6187 error messages that either had too many or two few arguments for the format
6190 16. The size of the buffer for calls to the DNS resolver has been increased
6191 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6192 for addresses that have a lot of PTR records. This alleviates a problem; it
6193 does not fully solve it.
6195 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6196 buffer now truncates the list and logs the incident, which is the same
6197 action as happens when Exim is looking up a host name and its aliases.
6198 Previously in this situation something unpredictable would happen;
6199 sometimes it was "internal error: store_reset failed".
6201 18. If a server dropped the connection unexpectedly when an Exim client was
6202 using GnuTLS and trying to read a response, the client delivery process
6203 crashed while trying to generate an error log message.
6205 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6206 string, for example:
6208 warn message = H1: something\nH2: something
6210 the text was added as a single header line from Exim's point of view
6211 though it ended up OK in the delivered message. However, searching for the
6212 second and subsequent header lines using $h_h2: did not work. This has been
6213 fixed. Similarly, if a system filter added multiple headers in this way,
6214 the routers could not see them.
6216 20. Expanded the error message when iplsearch is called with an invalid key to
6217 suggest using net-iplsearch in a host list.
6219 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6220 ACLs are no longer actually imposed (and a message to that effect is
6223 22. If a "gecos" field in a passwd entry contained escaped characters, in
6224 particular, if it contained a \" sequence, Exim got it wrong when building
6225 a From: or a Sender: header from that name. A second bug also caused
6226 incorrect handling when an unquoted " was present following a character
6227 that needed quoting.
6229 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6230 was not being matched caselessly.
6232 24. Arranged for all hyphens in the exim.8 source to be escaped with
6235 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6236 properly. Recipient callout cache records were still being keyed to include
6237 the sender, even when use_sender was set false. This led to far more
6238 callouts that were necessary. The sender is no longer included in the key
6239 when use_sender is false.
6241 26. Added "control = submission" modifier to ACLs.
6243 27. Added the ${base62d: operator to decode base 62 numbers.
6245 28. dnsdb lookups can now access SRV records.
6247 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6248 the configuration file.
6250 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6251 (-v) mode. This makes the output for a verbose queue run more intelligible.
6253 31. Added a use_postmaster feature to recipient callouts.
6255 32. Added the $body_zerocount variable, containing the number of binary zero
6256 bytes in the message body.
6258 33. The time of last modification of the "new" subdirectory is now used as the
6259 "mailbox time last read" when there is a quota error for a maildir
6262 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6264 35. Added +ignore_unknown as a special item in host lists.
6266 36. Code for decoding IPv6 addresses in host lists is now included, even if
6267 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6268 address was recognized as an IP address, but was then not correctly decoded
6269 into binary, causing unexpected and incorrect effects when compared with
6276 1. Very minor rewording of debugging text in manualroute to say "list of
6277 hosts" instead of "hostlist".
6279 2. If verify=header_syntax was set, and a header line with an unqualified
6280 address (no domain) and a large number of spaces between the end of the
6281 name and the colon was received, the reception process suffered a buffer
6282 overflow, and (when I tested it) crashed. This was caused by some obsolete
6283 code that should have been removed. The fix is to remove it!
6285 3. When running in the test harness, delay a bit after writing a bounce
6286 message to get a bit more predictability in the log output.
6288 4. Added a call to search_tidyup() just before forking a reception process. In
6289 theory, someone could use a lookup in the expansion of smtp_accept_max_
6290 per_host which, without the tidyup, could leave open a database connection.
6292 5. Added the variables $recipient_data and $sender_data which get set from a
6293 lookup success in an ACL "recipients" or "senders" condition, or a router
6294 "senders" option, similar to $domain_data and $local_part_data.
6296 6. Moved the writing of debug_print from before to after the "senders" test
6299 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6300 problems for message scanning, either using a data ACL, or using
6301 local_scan() because the Received: header was not generated till after they
6302 were called (in order to set the time as the time of reception completion).
6303 I have revised the way this works. The header is now generated after the
6304 body is received, but before the ACL or local_scan() are called. After they
6305 are run, the timestamp in the header is updated.
6311 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6312 before starting a queue runner without re-exec. This happened only when
6313 deliver_drop_privilege was set or when the Exim user was set to root. The
6314 effect of the bug was that timeouts during subsequent deliveries caused
6315 crashes instead of being properly handled. The handler is now left at its
6316 default (and expected) setting.
6318 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6319 message, again when deliver_drop_privilege is set or Exim is run as root.
6320 The bug described in (1) was not present in this case, but the tidying up
6321 of the other signals was missing. I have made the two cases consistent.
6323 3. The ignore_target_hosts setting on a manualroute router was being ignored
6324 for hosts that were looked up using the /MX notation.
6326 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6329 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6330 operated on the sender address. After changing the $sender_address to <>
6331 for the sender address verify, Exim was re-instated it as the original
6332 (before rewriting) address, but remembering that it had rewritten it, so it
6333 wasn't rewriting it again. This bug also had the effect of breaking the
6334 sender address verification caching when the sender address was rewritten.
6336 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6337 This has been changed so that if the ip literal address matches
6338 ignore_target_hosts, the router declines.
6340 7. Added expansion conditions match_domain, match_address, and match_local_
6341 part (NOT match_host).
6343 8. The placeholder for the Received: header didn't have a length field set.
6345 9. Added code to Exim itself and to exim_lock to test for a specific race
6346 condition that could lead to file corruption when using MBX delivery. The
6347 issue is with the lockfile that is created in /tmp. If this file is removed
6348 after a process has opened it but before that process has acquired a lock,
6349 there is the potential for a second process to recreate the file and also
6350 acquire a lock. This could lead to two Exim processes writing to the file
6351 at the same time. The added code performs the same test as UW imapd; it
6352 checks after acquiring the lock that its file descriptor still refers to
6353 the same named file.
6355 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6356 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6359 11. Added the smtp_active_hostname option. If used, this will typically be made
6360 to depend on the incoming interface address. Because $interface_address is
6361 not set up until the daemon has forked a reception process, error responses
6362 that can happen earlier (such as "too many connections") no longer contain
6365 12. If an expansion in a condition on a "warn" statement fails because a lookup
6366 defers, the "warn" statement is abandoned, and the next ACL statement is
6367 processed. Previously this caused the whole ACL to be aborted.
6369 13. Added the iplsearch lookup type.
6371 14. Added ident_timeout as a log selector.
6373 15. Added tls_certificate_verified as a log selector.
6375 16. Added a global option tls_require_ciphers (compare the smtp transport
6376 option of the same name). This controls incoming TLS connections.
6378 17. I finally figured out how to make tls_require_ciphers do a similar thing
6379 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6380 before starting the TLS session.
6382 18. Tabs are now shown as \t in -bP output.
6384 19. If the log selector return_path_on_delivery was set, Exim crashed when
6385 bouncing a message because it had too many Received: header lines.
6387 20. If two routers both had headers_remove settings, and the first one included
6388 a superfluous trailing colon, the final name in the first list and the
6389 first name in the second list were incorrectly joined into one item (with a
6390 colon in the middle).
6396 1. Added -C and -D options to the exinext utility, mainly to make it easier
6397 to include in the automated testing, but these could be helpful when
6398 multiple configurations are in use.
6400 2. The exinext utility was not formatting the output nicely when there was
6401 an alternate port involved in the retry record key, nor when there was a
6402 message id as well (for retries that were specific to a specific message
6403 and a specific host). It was also confused by IPv6 addresses, because of
6404 the additional colons they contain. I have fixed the IPv4 problem, and
6405 patched it up to do a reasonable job for IPv6.
6407 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6408 delivery, the log line now contains "pipelined" if PIPELINING was used.
6410 4. An SMTP transport process used to panic and die if the bind() call to set
6411 an explicit outgoing interface failed. This has been changed; it is now
6412 treated in the same way as a connect() failure.
6414 5. A reference to $sender_host_name in the part of a conditional expansion
6415 that was being skipped was still causing a DNS lookup. This no longer
6418 6. The def: expansion condition was not recognizing references to header lines
6419 that used bh_ and bheader_.
6421 7. Added the _cache feature to named lists.
6423 8. The code for checking quota_filecount in the appendfile transport was
6424 allowing one more file than it should have been.
6426 9. For compatibility with Sendmail, the command line option
6434 and sets the incoming protocol and host name (for trusted callers). The
6435 host name and its colon can be omitted when only the protocol is to be set.
6436 Note the Exim already has two private options, -pd and -ps, that refer to
6437 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6438 "s", but I don't think that's a major issue.
6440 10. A number of refactoring changes to the code, none of which should affect
6443 (a) The number of logging options was getting close to filling up the
6444 32-bit word that was used as a bit map. I have split them into two classes:
6445 those that are passed in the argument to log_write(), and those that are
6446 only ever tested independently outside of that function. These are now in
6447 separate 32-bit words, so there is plenty of room for expansion again.
6448 There is no change in the user interface or the logging behaviour.
6450 (b) When building, for example, log lines, the code previously used a
6451 macro that called string_cat() twice, in order to add two strings. This is
6452 not really sufficiently general. Furthermore, there was one instance where
6453 it was actually wrong because one of the argument was used twice, and in
6454 one call a function was used. (As it happened, calling the function twice
6455 did not affect the overall behaviour.) The macro has been replaced by a
6456 function that can join an arbitrary number of extra strings onto a growing
6459 (c) The code for expansion conditions now uses a table and a binary chop
6460 instead of a serial search (which was left over from when there were very
6461 few conditions). Also, it now recognizes conditions like "pam" even when
6462 the relevant support is not compiled in: a suitably worded error message is
6463 given if an attempt is made to use such a condition.
6465 11. Added ${time_interval:xxxxx}.
6467 12. A bug was causing one of the ddress fields not to be passed back correctly
6468 from remote delivery subprocesses. The field in question was not being
6469 subsequently used, so this caused to problems in practice.
6471 13. Added new log selectors queue_time and deliver_time.
6473 14. Might have fixed a bug in maildirsizefile handling that threw up
6474 "unexpected character" debug warnings, and recalculated the data
6475 unnecessarily. In any case, I expanded the warning message to give more
6478 15. Added the message "Restricted characters in address" to the statements in
6479 the default ACL that block characters like @ and % in local parts.
6481 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6482 Three changes have been made:
6484 (a) There was a serious bug; a negative response to MAIL caused the whole
6485 recipient domain to be cached as invalid, thereby blocking all messages
6486 to all local parts at the same domain, from all senders. This bug has
6487 been fixed. The domain is no longer cached after a negative response to
6488 MAIL if the sender used is not empty.
6490 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6493 (c) A new callout option, "use_sender" has been added for people who want
6494 the modified behaviour.
6500 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6503 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6504 indeed breaks things for older releases.
6506 3. Added additional logging to the case where there is a problem reading data
6507 from a filter that is running in a subprocess using a pipe, in order to
6508 try to track down a specific problem.
6510 4. Testing facility fudge: when running in the test harness and attempting
6511 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6512 getting "No route to host". Convert this to a timeout.
6514 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6517 6. Some OS don't have socklen_t but use size_t instead. This affects the
6518 fifth argument of getsockopt() amongst other things. This is now
6519 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6520 can be set for individual OS. I have set it for SunOS5, OSF1, and
6521 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6522 some earlier ones do not.
6524 7. Change 4.30/15 was not doing the test caselessly.
6526 8. The standard form for an IPv6 address literal was being rejected by address
6527 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6528 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6529 this, as well as the form without the "IPv6" on the front (but only when
6530 address literals are enabled, of course).
6532 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6534 10. Exim crashed if a message with an empty sender address specified by -f
6535 encountered a router with an errors_to setting. This could be provoked only
6536 by a command such as
6540 where an empty string was supplied; "<>" did not hit this bug.
6542 11. Installed PCRE release 4.5.
6544 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6545 remained set. It is now erased.
6547 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6548 times from message ids (which are base 36 rather than the normal 62).
6550 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6551 were being counted as actual protocol errors, and logged if the log
6552 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6553 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6554 and DATA following a set of rejected RCPTs do not count as protocol errors.
6555 In other words, Exim assumes they were pipelined, though this may not
6556 actually be the case. Of course, in all cases the client gets an
6557 appropriate error code.
6559 15. If a lookup fails in an ACL condition, a message about the failure may
6560 be available; it is used if testing the ACL cannot continue, because most
6561 such messages specify what the cause of the deferral is. However, some
6562 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6563 that caused an old message to be retained and used if a later statement
6564 caused a defer, replacing the real cause of the deferral.
6566 16. If an IP address had so many PTR records that the DNS lookup buffer
6567 was not large enough to hold them, Exim could crash while trying to process
6568 the truncated data. It now detects and logs this case.
6570 17. Further to 4.21/58, another change has been made: if (and only if) the
6571 first line of a message (the first header line) ends with CRLF, a bare LF
6572 in a subsequent header line has a space inserted after it, so as not to
6573 terminate the header.
6575 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6576 unnecessarily, used atoi() instead of strtol(), and didn't check the
6577 termination when getting file sizes from file names by regex.
6579 19. Completely re-implemented the support for maildirsize files, in the light
6580 of a number of problems with the previous contributed implementation
6581 (4.30/29). In particular:
6583 . If the quota is zero, the maildirsize file is maintained, but no quota is
6586 . If the maildir directory does not exist, it is created before any attempt
6587 to write a maildirsize file.
6589 . The quota value in the file is just a cache; if the quota is changed in
6590 the transport, the new value overrides.
6592 . A regular expression is available for excluding directories from the
6595 20. The autoreply transport checks the characters in options that define the
6596 message's headers; it allows continued headers, but it was checking with
6597 isspace() after an embedded newline instead of explicitly looking for a
6600 21. If all the "regular" hosts to which an address was routed had passed their
6601 expiry times, and had not reached their retry times, the address was
6602 bounced, even if fallback hosts were defined. Now Exim should go on to try
6605 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6606 equivalent code in the SMTP transport. Some hosts send humungous responses
6607 to HELO/EHLO, more than 1024 it seems.
6609 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6610 gives compiler warnings in some environments. I've now done it "properly",
6613 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6614 (because of problems with the built-in one) was declared to return uschar *
6615 instead of char *, causing compiler failure.
6617 25. Fixed a file descriptor leak when processing alias/forward files.
6619 26. Fixed a minor format string issue in dbfn.c.
6621 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6623 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6624 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6627 29. When a sender address is verified, it is cached, to save repeating the test
6628 when there is more than one recipient in a message. However, when the
6629 verification involves a callout, it is possible for different callout
6630 options to be set for different recipients. It is too complicated to keep
6631 track of this in the cache, so now Exim always runs a verification when a
6632 callout is required, relying on the callout cache for the optimization.
6633 The overhead is duplication of the address routing, but this should not be
6636 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6637 to be verified with callout=postmaster, and the main callout worked but the
6638 postmaster check failed, the verification correctly failed. However, if a
6639 subsequent RCPT command asked for sender verification *without* the
6640 postmaster check, incorrect caching caused this verification also to fail,
6643 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6644 it was not caching the DNS options (qualify_single, search_parents) that
6645 were used when the lookup failed. A subsequent lookup with different
6646 options therefore always gave the same answer, though there were cases
6647 where it should not have. (Example: a "domains = !$mx_any" option on a
6648 dnslookup router: the "domains" option is always processed without any
6649 widening, but the router might have qualify_single set.) Now Exim uses the
6650 cached value only when the same options are set.
6652 32. Added John Jetmore's "exipick" utility to the distribution.
6654 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6655 than a timeout (e.g. a certificate is required, and is not provided), an
6656 Exim server now closes the connection immediately. Previously it waited for
6657 the client to close - but if the client is SSL, it seems that they each
6658 wait for each other, leading to a delay before one of them times out.
6660 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6661 maintained 0.8.x compatibility because I don't think many are using it, and
6662 it is clearly obsolete.
6664 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6667 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6668 client certificate was expired. A simple patch fixes this, though I don't
6669 understand the full logic of why the verify callback is called multiple
6672 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6673 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6674 which causes problems with some clients (such as the Certicom SSL Plus
6675 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6676 disables the coutermeasure allowing Eudora to connect."
6678 38. Exim was not checking that a write() to a log file succeeded. This could
6679 lead to Bad Things if a log got too big, in particular if it hit a file
6680 size limit. Exim now panics and dies if it cannot write to a log file, just
6681 as it does if it cannot open a log file.
6683 39. Modified OS/Makefile-Linux so that it now contains
6685 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6687 The two -D definitions ensure that Exim is compiled with large file
6688 support, which makes it possible to handle log files that are bigger than
6691 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6692 instance) a domain was checked against a named list that involved a lookup,
6693 causing $domain_data to be set, then another domain was checked against the
6694 same list, then the first domain was re-checked, the value of $domain_data
6695 after the final check could be wrong. In particular, if the second check
6696 failed, it could be set empty. This bug probably also applied to
6699 41. The strip_trailing_dot option was not being applied to the address given
6700 with the -f command-line option.
6702 42. The code for reading a message's header from the spool was incrementing
6703 $received_count, but never initializing it. This meant that the value was
6704 incorrect (doubled) while delivering a message in the same process in which
6705 it was received. In the most common configuration of Exim, this never
6706 happens - a fresh exec is done - but it can happen when
6707 deliver_drop_privilege is set.
6709 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6710 it now includes up to 150 characters of the unexpected data in the log
6713 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6714 and building data strings. The size of both of these buffers was 10 000
6715 bytes - far larger than anybody would *ever* want, thought I. Needless to
6716 say, somebody hit the limit. I have increased the maximum line length to
6717 20 000 and the maximum data length of concatenated lines to 100 000. I have
6718 also fixed two bugs, because there was no checking on these buffers. Tsk,
6719 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6720 buffer is too small.
6722 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6723 lsearch lookups. Now it does.
6725 46. When parsing a route_list item in a manualroute router, a fixed-length
6726 buffer was used for the list of hosts. I made this 1024 bytes long,
6727 thinking that nobody would ever have a list of hosts that long. Wrong.
6728 Somebody had a whole pile of complicated expansion conditions, and the
6729 string was silently truncated, leading to an expansion error. It turns out
6730 that it is easier to change to an unlimited length (owing to other changes
6731 that have happened since this code was originally written) than to build
6732 structure for giving a limitation error. The length of the item that
6733 expands into the list of hosts is now unlimited.
6735 47. The lsearch lookup could not handle data where the length of text line was
6736 more than 4095 characters. Such lines were truncated, leading to shortened
6737 data being returned. It should now handle lines of any length.
6739 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6740 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6743 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6744 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6745 no longer happens in comment lines. A list of replacements is now placed
6746 at the head of all of the source files, except those whose only change is
6747 to replace PERL_COMMAND in the very first #! line.
6749 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6750 messages on the queue, with a bottom-up merge sort, using code contributed
6751 by Michael Haardt. This should make operations like -bp somewhat faster on
6752 large queues. It won't affect queue runners, except when queue_run_in_order
6755 51. Installed eximstats 1.31 in the distribution.
6757 52. Added support for SRV lookups to the dnslookup router.
6759 53. If an ACL referred to $message_body or $message_body_end, the value was not
6760 reset for any messages that followed in the same SMTP session.
6762 54. The store-handling optimization for building very long strings was not
6763 differentiating between the different store pools. I don't think this
6764 actually made any difference in practice, but I've tidied it.
6766 55. While running the routers to verify a sender address, $sender_address
6767 was still set to the sender address. This is wrong, because when routing to
6768 send a bounce to the sender, it would be empty. Therefore, I have changed
6769 it so that, while verifying a sender address, $sender_address is set to <>.
6770 (There is no change to what happens when verifying a recipient address.)
6772 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6773 target A or AAAA records (if not already returned) without resetting the
6774 qualify_single or search_parents options of the DNS resolver. These are
6775 inappropriate in this case because the targets of MX and SRV records must
6776 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6777 target that, when qualified, matched something in the local domain. These
6778 two options are now turned off when doing these lookups.
6780 57. It seems that at least some releases of Reiserfs (which does not have the
6781 concept of a fixed number of inodes) returns zero and not -1 for the
6782 number of available inodes. This interacted badly with check_spool_inodes,
6783 which assumed that -1 was the "no such thing" setting. What I have done is
6784 to check that the total number of inodes is greater than zero before doing
6785 the test of how many are available.
6787 58. When a "warn" ACL statement has a log_message modifier, the message is
6788 remembered, and not repeated. This is to avoid a lot of repetition when a
6789 message has many recipients that cause the same warning to be written.
6790 However, Exim was preserving the list of already written lines for an
6791 entire SMTP session, which doesn't seem right. The memory is now reset if a
6792 new message is started.
6794 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6795 debugging output unless log_rewrite was also set.
6797 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6798 of (int)(handle) when we know that handle contains (void *)(-1).
6800 61. The Exim daemon panic-logs an error return when it closes the incoming
6801 connection. However "connection reset by peer" seems to be common, and
6802 isn't really an error worthy of noting specially, so that particular error
6805 62. When Exim is trying to find all the local interfaces, it used to panic and
6806 die if the ioctl to get the interface flags failed. However, it seems that
6807 on at least one OS (Solaris 9) it is possible to have an interface that is
6808 included in the list of interfaces, but for which you get a failure error
6809 for this call. This happens when the interface is not "plumbed" into a
6810 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6811 failure of the "get flags" call assumes that the interface is down.
6813 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6814 makes life easier for people who are doing arithmetic on fields extracted
6815 from dates, where you often get leading zeros that should not be
6816 interpreted as octal.
6818 64. Added qualify_domain to the redirect router, to override the global
6821 65. If a pathologically long header line contained very many addresses (the
6822 report of this problem mentioned 10 000) and each of them was rewritten,
6823 Exim could use up a very large amount of memory. (It kept on making new
6824 copies of the header line as it rewrote, and never released the old ones.)
6825 At the expense of a bit more processing, the header rewriting function has
6826 been changed so that it no longer eats memory in this way.
6828 66. The generation of the Received: header has been moved from the time that a
6829 message starts to be received, to the time that it finishes. The timestamp
6830 in the Received: header should now be very close to that of the <= log
6831 line. There are two side-effects of this change:
6833 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6834 logged header lines no longer include the local Received: line, because
6835 it has not yet been created. The same applies to a copy of the message
6836 that is returned to a non-SMTP sender when a message is rejected.
6838 (b) When a filter file is tested using -bf, no additional Received: header
6839 is added to the test message. After some thought, I decided that this
6842 This change does not affect the value of $received_for. It is still set
6843 after address rewriting, but before local_scan() is called.
6845 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6847 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6848 gave an unhelpful panic error message, and a defer error. I have managed to
6849 change this behaviour so that it now rejects any supplied certificate,
6850 which seems right, as the list of acceptable certificates is empty.
6852 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6853 gave an unhelpful defer error. I have not managed to make this reject any
6854 supplied certificates, but the error message it gives is "no certificate
6855 supplied", which is not helpful.
6857 70. exigrep's output now also includes lines that are not associated with any
6858 message, but which match the given pattern. Implemented by a patch from
6859 Martin Sluka, which also tidied up the Perl a bit.
6861 71. Recipient callout verification, like sender verification, was using <> in
6862 the MAIL FROM command. This isn't really the right thing, since the actual
6863 sender may affect whether the remote host accepts the recipient or not. I
6864 have changed it to use the actual sender in the callout; this means that
6865 the cache record is now keyed on a recipient/sender pair, not just the
6866 recipient address. There doesn't seem to be a real danger of callout loops,
6867 since a callout by the remote host to check the sender would use <>.
6868 [SEE ABOVE: changed after hitting problems.]
6870 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6871 temporary errors. However, in the case of such a code being given after
6872 the end of a data transmission (i.e. after ".") Exim was failing to write
6873 a retry record for the message. (Yes, there was some broken host that was
6874 actually sending 8xx at this point.)
6876 73. An unknown lookup type in a host list could cause Exim to panic-die when
6877 the list was checked. (An example that provoked this was putting <; in the
6878 middle of a list instead of at the start.) If this happened during a DATA
6879 ACL check, a -D file could be left lying around. This kind of configuration
6880 error no longer causes Exim to die; instead it causes a defer error. The
6881 incident is still logged to the main and panic logs.
6883 74. Buglet left over from Exim 3 conversion. The message "too many messages
6884 in one connection" was written to the rejectlog but not the mainlog, except
6885 when address rewriting (yes!) was being logged.
6887 75. Added write_rejectlog option.
6889 76. When a system filter was run not as root (that is, when system_filter_user
6890 was set), the values of the $n variables were not being returned to the
6891 main process; thus, they were not subsequently available in the $sn
6894 77. Added +return_path_on_delivery log selector.
6896 78. A connection timeout was being treated differently from recipients deferred
6897 when testing hosts_max_try with a message that was older than the host's
6898 retry timeout. (The host should not be counted, thus allowing all hosts to
6899 be tried at least once before bouncing.) This may have been the cause of an
6900 occasionally reported bug whereby a message would remain on the queue
6901 longer than the retry timeout, but would be bounced if a delivery was
6902 forced. I say "may" because I never totally pinned down the problem;
6903 setting up timeout/retry tests is difficult. See also the next item.
6905 79. The ultimate address timeout was not being applied to errors that involved
6906 a combination of host plus message (for example, a timeout on a MAIL
6907 command). When an address resolved to a number of possible hosts, and they
6908 were not all tried for each delivery (e.g. because of hosts_max_try), a
6909 message could remain on the queue longer than the retry timeout.
6911 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6914 81. Fixed an obscure SMTP outgoing bug which required at least the following
6915 conditions: (a) there was another message waiting for the same server;
6916 (b) the server returned 5xx to all RCPT commands in the first message so
6917 that the message was not completed; (c) the server dropped the connection
6918 or gave a negative response to the RSET that Exim sends to abort the
6919 transaction. The observed case was a dropped connection after DATA that had
6920 been sent in pipelining mode. That is, the server had advertised PIPELINING
6921 but was not implementing it correctly. The effect of the bug was incorrect
6922 behaviour, such as trying another host, and this could lead to a crash.
6928 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6929 and daemon.c were passed as pointers to ints; they should have been
6930 pointers to socklen_t variables (which are typically unsigned ints).
6932 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6935 3. Fixed a really odd bug that affected only the testing scheme; patching a
6936 certain fixed string in the binary changed the value of another string that
6937 happened to be identical to the end of the original first string.
6939 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6940 name", it returns that address as the IP address. On some operating
6941 systems (e.g. Solaris), it also passes back the IP address string as the
6942 "host name". However, on others (e.g. Linux), it passes back an empty
6943 string. Exim wasn't checking for this, and was changing the host name to an
6944 empty string, assuming it had been canonicalized.
6946 5. Although rare, it is permitted to have more than one PTR record for a given
6947 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6948 all the names associated with an address, because they do in Solaris.
6949 However, it seems that they do not in Linux for data that comes from the
6950 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6951 I found this out when I moved to a new Linux workstation and tried to run
6952 the Exim test suite.
6954 To get round this problem I have changed the code so that it now does its
6955 own call to the DNS to look up PTR records when searching for a host name.
6956 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6957 addresses that are only in /etc/hosts are still found.
6959 This behaviour is, however, controlled by an option called host_lookup_
6960 order, which defaults to "bydns:byaddr". If people want to use the other
6961 order, or indeed, just use one or the other means of lookup, they can
6962 specify it in this variable.
6964 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6965 some operating systems, this comes back from gethostbyaddr() as an empty
6966 string, and this is what Exim used to test for. However, it seems that in
6967 other systems, "." is yielded. Exim now tests for this case too.
6969 7. The values of check_spool_space and check_log_space are now held internally
6970 as a number of kilobytes instead of an absolute number of bytes. If a
6971 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6972 kilobyte. This means that much larger values can be stored.
6974 8. Exim monitor: an attempt to get the action menu when not actually pointing
6975 at a message produces an empty menu entitled "No message selected". This
6976 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6977 no entries in it ("Shell widget menu has zero width and/or height"). So I
6978 have added a single, blank menu entry in this case.
6980 9. Added ${quote_local_part.
6982 10. MIME decoding is now applied to the contents of Subject: header lines when
6985 11. Now that a reference to $sender_host_address automatically causes a reverse
6986 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6987 host lookup before query-style lookups in lists that might use this
6988 variable. This has therefore been abolished, and the "net-" prefix is no
6989 longer necessary for query-style lookups.
6991 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6992 have been a typo for LFLAGS, so it has been changed.
6994 13. The install script calls Exim with "-C /dev/null" in order to find the
6995 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6996 to be output. However, since Exim outputs its version number before the
6997 error, it didn't break the script. It just looked ugly. I fixed this by
6998 always allowing "-C /dev/null" if the caller is root.
7000 14. Ignore overlarge ACL variable number when reading spool file - insurance
7001 against a later release with more variables having written the file.
7003 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7004 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7005 this, as well as the form without the "IPv6" on the front.
7007 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7008 OS/Makefile-Darwin file.
7010 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7011 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7013 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7014 variable. However, some OS use ints for inodes. I've added cast to long int
7015 to get rid of the compiler warning.
7017 19. I had forgotten to lock out "/../" in configuration file names when
7018 ALT_CONFIG_PREFIX was set.
7020 20. Routers used for verification do not need to specify transports. However,
7021 if such a router generated a host list, and callout was configured, Exim
7022 crashed, because it could not find a port number from the (non-existent)
7023 transport. It now assumes port 25 in this circumstance.
7025 21. Added the -t option to exigrep.
7027 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7028 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7029 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7030 them is set, LOOKUP_LSEARCH is forced.
7032 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7034 24. Added sender and host information to the "rejected by local_scan()" log
7035 line; previously there was no indication of these.
7037 25. Added .include_if_exists.
7039 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7040 Linux. It turns out that not all file systems support this. Apparently some
7041 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7042 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7043 not supported on the file descriptor, is now ignored when Exim is trying to
7044 sync a directory. This applies only to Linux.
7046 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7048 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7049 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7052 29. Added support for maildirsize files from supplied patch (modified a bit).
7054 30. The use of :fail: followed by an empty string could lead Exim to respond to
7055 sender verification failures with (e.g.):
7057 550 Verification failed for <xxx>
7058 550 Sender verify failed
7060 where the first response line was missing the '-' that indicates it is not
7061 the final line of the response.
7063 31. The loop for finding the name of the user that called Exim had a hardwired
7064 limit of 10; it now uses the value of finduser_retries, which is used for
7065 all other user lookups.
7067 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7070 33. Exim was neglecting to zero errno before one call of strtol() when
7071 expanding a string and expecting an integer value. On some systems this
7072 resulted in spurious "integer overflow" errors. Also, it was casting the
7073 result into an int without checking.
7075 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7076 did not work. The code looks as if it has *never* worked, though it appears
7077 to have been documented since at least release 1.62. I have made it work.
7079 35. The "timeout_DNS" error in retry rules, also documented since at least
7080 1.62, also never worked. As it isn't clear exactly what this means, and
7081 clearly it isn't a major issue, I have abolished the feature by treating it
7082 as "timeout", and writing a warning to the main and panic logs.
7084 36. The display of retry rules for -brt wasn't always showing the error code
7087 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7088 timeout_connect_A, timeout_connect_MX.
7090 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7091 to the empty sender.
7093 39. The daemon was not analysing the content of -oX till after it had closed
7094 stderr and disconnected from the controlling terminal. This meant that any
7095 syntax errors were only noted on the panic log, and the return code from
7096 the command was 0. By re-arranging the code a little, I've made the
7097 decoding happen first, so such errors now appear on stderr, and the return
7098 code is 1. However, the actual setting up of the sockets still happens in
7099 the disconnected process, so errors there are still only recorded on the
7102 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7103 connections (as happens on some IP stacks) was logged at start up time as
7104 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7105 it from "IPv6 and IPv4", which means that two separate sockets are being
7108 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7109 says whether AF_INET or AF_INET6 was passed as an argument.
7111 42. Exiwhat output was messed up when time zones were included in log
7114 43. Exiwhat now gives more information about the daemon's listening ports,
7115 and whether -tls-on-connect was used.
7117 44. The "port" option of the smtp transport is now expanded.
7119 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7120 silently ignored. Now an error message is written to the main and panic
7123 46. There's a new ACL modifier called "logwrite" which writes to a log file
7124 as soon as it is encountered.
7126 47. Added $local_user_uid and $local_user_gid at routing time.
7128 48. Exim crashed when trying to verify a sender address that was being
7131 49. Exim was recognizing only a space character after ".include". It now also
7132 recognizes a tab character.
7134 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7135 extracting the relevant information from the specification. The man page no
7136 longer contains scrambled data for the -d option, and I've added a section
7137 at the front about calling Exim under different names.
7139 51. Added "extra_headers" argument to the "mail" command in filter files.
7141 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7144 53. Installed eximstats 1.29.
7146 54. Added transport_filter_timeout as a generic transport option.
7148 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7149 Cc: header lines. This was required by RFC 822, but it not required by RFC
7152 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7153 incoming messages that did not have them. Now it does so only if the
7154 message originates locally, that is, if there is no associated remote host
7155 address. When Resent- header lines are present, this applies to the Resent-
7156 lines rather than the non-Resent- lines.
7158 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7159 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7161 58. Messages for configuration errors now include the name of the main
7162 configuration file - useful now that there may be more than one file in a
7163 list (.included file names were always shown).
7165 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7166 for those rare installations that do not start the daemon as root or run it
7167 setuid root. I've cut out the call to initgroups() if the daemon is not
7170 60. The Exim user and group can now be bound into the binary as text strings
7171 that are looked up at the start of Exim's processing.
7173 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7175 62. Added $mailstore_basename variable.
7177 63. Installed patch to sieve.c from Michael Haardt.
7179 64. When Exim failed to open the panic log after failing to open the main log,
7180 the original message it was trying to log was written to stderr and debug
7181 output, but if they were not available (the usual case in production), it
7182 was lost. Now it is written to syslog before the two lines that record the
7183 failures to open the logs.
7185 65. Users' Exim filters run in subprocesses under the user's uid. It is
7186 possible for a "deliver" command or an alias in a "personal" command to
7187 provoke an address rewrite. If logging of address rewriting is configured,
7188 this fails because the process is not running as root or exim. There may be
7189 a better way of dealing with this, but for the moment (because 4.30 needs
7190 to be released), I have disabled address rewrite logging when running a
7191 filter in a non-root, non-exim process.
7197 1. The buildconfig auxiliary program wasn't quoting the value set for
7198 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7199 not defined. This bug was masked in 4.22 by the effect that was fixed in
7202 2. Some messages that were rejected after a message id was allocated were
7203 shown as "incomplete" by exigrep. It no longer does this for messages that
7204 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7206 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7207 have allow_domain_literals set, the ID did not get logged in the <= line.
7208 Domain literals are now always recognized in Message-ID: header lines.
7210 4. The first argument for a ${extract expansion item is the key name or field
7211 number. Leading and trailing spaces in this item were not being ignored,
7212 causing some misleading effects.
7214 5. When deliver_drop_privilege was set, single queue runner processes started
7215 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7216 same command in the process it spins off) were not dropping privilege.
7218 6. When the daemon running as "exim" started a queue runner, it always
7219 re-executed Exim in the spun-off process. This is a waste of effort when
7220 deliver_drop_privilege is set. The new process now just calls the
7221 queue-runner function directly.
7227 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7230 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7231 ignored. Though the use of -oP was forcing the writing of a pid file, it
7232 was always written to the default place.
7234 3. If the message "no IP address found for host xxxx" is generated during
7235 incoming verification, it is now followed by identification of the incoming
7236 connection (so you can more easily find what provoked it).
7238 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7240 5. Added some features to "harden" Exim a bit more against certain attacks:
7242 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7243 be put in Local/Makefile. This is like the never_users runtime option,
7244 but it cannot be overridden. The default setting is "root".
7246 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7247 prefix string with which any file named in a -C command line option
7250 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7251 is retained for -C and -D only if the caller of Exim is root. Without
7252 it, the exim user may also use -C and -D and retain privilege.
7254 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7255 command line option is disabled.
7257 6. Macro names set by the -D option must start with an upper case letter, just
7258 like macro names defined in the configuration file.
7260 7. Added "dereference=" facility to LDAP.
7262 8. Two instances of the typo "uknown" in the source files are fixed.
7264 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7265 the Configure-Makefile script screwed up while processing it.
7267 10. Incorporated PCRE 4.4.
7269 11. The SMTP synchronization check was not operating right at the start of an
7270 SMTP session. For example, it could not catch a HELO sent before the client
7271 waited for the greeting. There is now a check for outstanding input at the
7272 point when the greeting is written. Because of the duplex, asynchronous
7273 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7274 way, but not yet received, when the check is performed.
7276 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7277 on TCP/IP sockets, because this apparently causes some broken clients to
7280 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7281 unchanged) from the Cygwin maintainer.
7283 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7284 was supported instead of testing for mbx. Effectively a typo.
7286 15. The spa authenticator server code was not checking that the input it
7287 received was valid base64.
7289 16. The debug output line for the "set" modifier in ACLs was not showing the
7290 name of the variable that was being set.
7292 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7294 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7295 lookup on its own. Something else was needed to trigger the lookup. For
7296 example, a match in host_lookup or the need for a host name in a host list.
7297 Now, if $sender_host_name is referenced and the host name has not yet been
7298 looked up, a lookup is performed. If the lookup fails, the variable remains
7299 empty, and $host_lookup_failed is set to "1".
7301 19. Added "eqi" as a case-independent comparison operator.
7303 20. The saslauthd authentication condition could segfault if neither service
7304 nor realm was specified.
7306 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7307 error message that was logged was misleading, and incoming SMTP
7308 connections were dropped. The message is now more accurate, and temporary
7309 errors are given to SMTP connections.
7311 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7312 (except RSET) with a 421 error, until QUIT is received. However, it was
7313 failing to send a response to QUIT.
7315 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7316 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7317 ACL is now run after the helo_try_verify_hosts code.
7319 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7320 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7321 case-independent, so other case variants are also recognized). Apparently
7322 some systems use these upper case variants.
7324 25. If more than two messages were waiting for the same host, and a transport
7325 filter was specified for the transport, Exim sent two messages over the
7326 same TCP/IP connection, and then failed with "socket operation on non-
7327 socket" when it tried to send the third.
7329 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7331 27. The extern definition of crypt16() in expand.c was not being excluded when
7332 the OS had its own crypt16() function.
7334 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7335 as a preferred synonym for return_size_limit, both as an option and as an
7338 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7340 30. Changed the default configuration ACL to relax the local part checking rule
7341 for addresses that are not in any local domains. For these addresses,
7342 slashes and pipe symbols are allowed within local parts, but the sequence
7343 /../ is explicitly forbidden.
7345 31. SPA server authentication was not clearing the challenge buffer before
7348 32. log_message in a "warn" ACL statement was writing to the reject log as
7349 well as to the main log, which contradicts the documentation and doesn't
7350 seem right (because no rejection is happening). So I have stopped it.
7352 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7353 However, I am unable to do any testing of this.
7355 34. Fixed an infelicity in the appendfile transport. When checking directories
7356 for a mailbox, to see if any needed to be created, it was accidentally
7357 using path names with one or more superfluous leading slashes; tracing
7358 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7360 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7361 contents are added to the log line that is written for every discarded
7362 recipient. (Previously a log_message setting was ignored.)
7364 36. The ${quote: operator now quotes the string if it is empty.
7366 37. The install script runs exim in order to find its version number. If for
7367 some reason other than non-existence or emptiness, which it checks, it
7368 could not run './exim', it was installing it with an empty version number,
7369 i.e. as "exim-". This error state is now caught, and the installation is
7372 38. An argument was missing from the function that creates an error message
7373 when Exim fails to connect to the socket for saslauthd authentication.
7374 This could cause Exim to crash, or give a corrupted message.
7376 39. Added isip, isip4, and isip6 to ${if conditions.
7378 40. The ACL variables $acl_xx are now saved with the message, and can be
7379 accessed later in routers, transports, and filters.
7381 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7382 strings in the file are not string-expanded.
7384 42. If a MAIL command specified a SIZE value that was too large to fit into an
7385 int variable, the check against message_size_limit failed. Such values are
7386 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7387 day this will have to be increased, but I don't think I want to be around
7388 when emails are that large.
7395 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7396 iconv() is not standard in FreeBSD.
7398 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7399 IPv6 enabled. The observed symptom was a segmentation fault on return from
7400 the function os_common_find_running_interfaces() in src/os.c.
7402 3. In the check_special_case() function in daemon.c I had used "errno" as an
7403 argument name, which causes warnings on some systems. This was basically a
7404 typo, since it was named "eno" in the comments!
7406 4. The code that waits for the clock to tick (at a resolution of some fraction
7407 of a second) so as to ensure message-id uniqueness was always waiting for
7408 at least one whole tick, when it could have waited for less. [This is
7409 almost certainly not relevant at current processor speeds, where it is
7410 unlikely to ever wait at all. But we try to future-proof.]
7412 5. The function that sleeps for a time interval that includes fractions of a
7413 second contained a race. It did not block SIGALRM between setting the
7414 timer, and suspending (a couple of lines later). If the interval was short
7415 and the sigsuspend() was delayed until after it had expired, the suspension
7416 never ended. On busy systems this could lead to processes getting stuck for
7419 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7420 process, before it forks any delivery processes. The open lookup caching
7421 mechanism meant that the open file or database connection was passed into
7422 the delivery process. The problem was that delivery processes always tidy
7423 up cached lookup data. This could cause a problem for the next delivery
7424 process started by the queue runner, because the external queue runner
7425 process does not know about the closure. So the next delivery process
7426 still has data in the lookup cache. In the case of a file lookup, there was
7427 no problem because closing a file descriptor in a subprocess doesn't affect
7428 the parent. However, if the lookup was caching a connection to a database,
7429 the connection was closed, and the second delivery process was likely to
7430 see errors such as "PGSQL: query failed: server closed the connection
7431 unexpectedly". The problem has been fixed by closing all cached lookups
7432 in a queue runner before running a delivery process.
7434 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7435 seem to have the "const" qualifier which it has on other OS. I've
7438 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7439 *of the same type* (client or server) with the same public name that an
7440 error should be diagnosed.
7442 9. When Exim looked up a host name for an IP address, but failed to find the
7443 original IP address when looking up the host name (a safety check), it
7444 output the message "<ip address> does not match any IP for NULL", which was
7445 confusing, to say the least. The bug was that the host name should have
7446 appeared instead of "NULL".
7448 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7449 user that is built into the binary, and the -C or -D options is used, root
7450 privilege is dropped before the configuration file is read. In addition,
7451 logging is switched to stderr instead of the normal log files. If the
7452 configuration then re-defines the Exim user, the unprivileged environment
7453 is probably not what is expected, so Exim logs a panic warning message (but
7456 However, if deliver_drop_privilege is set, the unprivileged state may well
7457 be exactly what is intended, so the warning has been cut out in that case,
7458 and Exim is allowed to try to write to its normal log files.
7464 1. smtp_return_error_details was not giving details for temporary sender
7465 or receiver verification errors.
7467 2. Diagnose a configuration error if two authenticators have the same public
7470 3. Exim used not to create the message log file for a message until the first
7471 delivery attempt. This could be confusing when incoming messages were held
7472 for policy or load reasons. The message log file is now created at the time
7473 the message is received, and an initial "Received" line is written to it.
7475 4. The automatically generated man page for command line options had a minor
7476 bug that caused no ill effects; however, a more serious problem was that
7477 the procedure for building the man page automatically didn't always
7478 operate. Consequently, release 4.20 contains an out-of-date version. This
7479 shouldn't happen again.
7481 5. When building Exim with embedded Perl support, the script that builds the
7482 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7483 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7485 6. The freeze_tell option was not being used for messages that were frozen on
7486 arrival, either by an ACL or by local_scan().
7488 7. Added the smtp_incomplete_transaction log selector.
7490 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7491 was accepting AUTH without a new EHLO.
7493 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7494 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7497 10. Logging of TCP/IP connections (when configured) now happens in the main
7498 daemon process instead of the child process, so that the TCP/IP connection
7499 count is more accurate (but it can never be perfect).
7501 11. The use of "drop" in a nested ACL was not being handled correctly in the
7502 outer ACL. Now, if condition failure induced by the nested "drop" causes
7503 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7504 or "require"), the connection is dropped.
7506 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7507 that yield "discard" can now be used with an "accept" or a "discard" verb,
7508 but an error is generated for any others (because I can't see a useful way
7509 to define what should happen).
7511 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7512 are now processed in the same way as lines in the Exim configuration file.
7513 In particular, continuation lines are supported.
7515 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7517 15. Added -ti meaning -t -i.
7519 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7520 domains, and warn by logging if others are found.
7522 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7523 returned from GIFCONF when Exim is trying to find the list of interfaces on
7524 a host. The code in os.c has been modified to copy each ifreq to an aligned
7525 structure in all cases.
7527 Also, in some cases, the returned ifreq's were being copied to a 'struct
7528 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7529 means the last couple of bytes of an IPv6 address could be chopped if the
7530 ifreq contained only a normal sockaddr (14 bytes storage).
7532 18. Named domain lists were not supported in the hosts_treat_as_local option.
7533 An entry such as +xxxx was not recognized, and was treated as a literal
7536 19. Ensure that header lines added by a DATA ACL are included in the reject log
7537 if the ACL subsequently rejects the message.
7539 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7540 MD5 (which is deprecated).
7542 21. When testing a filter file using -bf, Exim was writing a message when it
7543 took the sender from a "From " line in the message, but it was not doing so
7544 when it took $return_path from a Return-Path: header line. It now does.
7546 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7547 with a valid header line field name (a series of printing characters
7548 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7550 23. Changed "disc" in the source to "disk" to conform to the documentation and
7551 the book and for uniformity.
7553 24. Ignore Sendmail's -Ooption=value command line item.
7555 25. When execve() failed while trying to run a command in a pipe transport,
7556 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7557 could be confused with a return value of 69 from the command itself. This
7558 has been changed to 127, the value the shell returns if it is asked to run
7559 a non-existent command. The wording for the related log line suggests a
7560 non-existent command as the problem.
7562 26. If received_header_text expands to an empty string, do not add a Received:
7563 header line to the message. (Well, it adds a token one on the spool, but
7564 marks it "old" so that it doesn't get used or transmitted.)
7566 27. Installed eximstats 1.28 (addition of -nt option).
7568 28. There was no check for failure on the call to getsockname() in the daemon
7569 code. This can fail if there is a shortage of resources on the system, with
7570 ENOMEM, for example. A temporary error is now given on failure.
7572 29. Contrary to the C standard, it seems that in some environments, the
7573 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7574 program. Exim now does this explicitly; it affects the formatting of
7575 timestamps using strftime().
7577 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7578 complaints. I've now initialized all the variables, to avoid this.
7580 32. Header lines added by a system filter were not being "seen" during
7581 transport-time rewrites.
7583 33. The info_callback() function passed to OpenSSL is set up with type void
7584 (*)(SSL *, int, int), as described somewhere. However, when calling the
7585 function (actually a macro) that sets it up, the type void(*)() is
7586 expected. I've put in a cast to prevent warnings from picky compilers.
7588 34. If a DNS black list lookup found a CNAME record, but there were no A
7589 records associated with the domain it pointed at, Exim crashed.
7591 35. If a DNS black list lookup returned more than one A record, Exim ignored
7592 all but the first. It now scans all returned addresses if a particular IP
7593 value is being sought. In this situation, the contents of the
7594 $dnslist_value variable are a list of all the addresses, separated by a
7597 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7598 to accept a host name and all its aliases if the forward lookup for any of
7599 them yielded the IP address of the incoming connection. Now it accepts only
7600 those names whose forward lookup yields the correct IP address. Any other
7601 names are discarded. This closes a loophole whereby a rogue DNS
7602 administrator could create reverse DNS records to break through a
7603 wildcarded host restriction in an ACL.
7605 37. If a user filter or a system filter that ran in a subprocess used any of
7606 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7607 the wrong values were passed to the pipe command ($thisaddress had the
7608 value of $0, $0 had the value of $1, etc). This bug was introduced by
7609 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7611 38. Improved the line breaking for long SMTP error messages from ACLs.
7612 Previously, if there was no break point between 40 and 75 characters, Exim
7613 left the rest of the message alone. Two changes have been made: (a) I've
7614 reduced the minimum length to 35 characters; (b) if it can't find a break
7615 point between 35 and 75 characters, it looks ahead and uses the first one
7616 that it finds. This may give the occasional overlong line, but at least the
7617 remaining text gets split now.
7619 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7620 file descriptors might be low, and that setting 1000 would always raise it.
7621 It turns out that in some environments, the limit is already over 1000 and
7622 that lowering it causes trouble. So now Exim takes care not to decrease it.
7624 40. When delivering a message, the value of $return_path is set to $sender_
7625 address at the start of routing (routers may change the value). By an
7626 oversight, this default was not being set up when an address was tested by
7627 -bt or -bv, which affected the outcome if any router or filter referred to
7630 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7631 log only when "message" or "log_message" are set. However, if one of the
7632 conditions was an address verification, or a call to a nested ACL, the
7633 messages generated by the underlying test were being passed through. This
7634 no longer happens. The underlying message is available in $acl_verify_
7635 message for both "message" and "log_message" expansions, so it can be
7636 passed through if needed.
7638 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7639 new expansion $bh_ to give the encoded byte string without charset
7640 translation. Translation happens only if iconv() is available; HAVE_ICONV
7641 indicates this at build time. HEADERS_CHARSET gives the charset to
7642 translate to; headers_charset can change it in the configuration, and
7643 "headers charset" can change it in an individual filter file.
7645 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7646 that creates RFC 2047 encoded "words" labels them as that charset instead
7647 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7648 expansion operator; (ii) when Exim creates a From: line for a local
7649 message; (iii) when a header line is rewritten to include a "phrase" part.
7651 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7652 buggy, causing it to skip the first lines of messages whose message ID
7653 ended in 'D'. This would not have bitten before Exim release 4.14, because
7654 message IDs were unlikely to end in 'D' before then. The effect was to have
7655 incorrect size information for certain domains.
7657 45. #include "config.h" was missing at the start of the crypt16.c module. This
7658 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7661 46. If there was a timeout during a "random" callout check, Exim treated it as
7662 a failure of the random address, and carried on sending RSET and the real
7663 address. If the delay was just some slowness somewhere, the response to the
7664 original RCPT would be taken as a response to RSET and so on, causing
7665 mayhem of various kinds.
7667 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7668 when I implemented it. It didn't allow for the fact that some option values
7669 may legitimately be negative (e.g. size_addition), and it didn't even do
7670 the right test for positive values.
7672 48. Domain names in DNS records are case-independent. Exim always looks them up
7673 in lower case. Some resolvers return domain names in exactly the case they
7674 appear in the zone file, that is, they may contain uppercase letters. Not
7675 all resolvers do this - some return always lower case. Exim was treating a
7676 change of case by a resolver as a change of domain, similar to a widening
7677 of a domain abbreviation. This triggered its re-routing code and so it was
7678 trying to route what was effectively the same domain again. This normally
7679 caused routing to fail (because the router wouldn't handle the domain
7680 twice). Now Exim checks for this case specially, and just changes the
7681 casing of the domain that it ultimately uses when it transmits the message
7684 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7687 50. If a filter generated a file delivery with a non-absolute name (possible if
7688 no home directory exists for the router), the forbid_file option was not
7691 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7692 the existing equality matching.
7694 52. Exim was using ints instead of ino_t variables in some places where it was
7695 dealing with inode numbers.
7697 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7698 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7699 called TMPDIR, and if it finds it is different, it changes its value.
7701 54. The smtp_printf() function is now made available to local_scan() so
7702 additional output lines can be written before returning. There is also an
7703 smtp_fflush() function to enable the detection of a dropped connection.
7704 The variables smtp_input and smtp_batched_input are exported to
7707 55. Changed the default runtime configuration: the message "Unknown user"
7708 has been removed from the ACL, and instead placed on the localuser router,
7709 using the cannot_route_message feature. This means that any verification
7710 failures that generate their own messages won't get overridden. Similarly,
7711 the "Unrouteable address" message that was in the ACL for unverifiable
7712 relay addresses has also been removed.
7714 56. Added hosts_avoid_esmtp to the smtp transport.
7716 57. The exicyclog script was not checking for the esoteric option
7717 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7718 will work only if exicyclog is run under the appropriate euid.
7720 58. Following a discussion on the list, the rules by which Exim recognises line
7721 endings on incoming messages have been changed. The -dropcr and drop_cr
7722 options are now no-ops, retained only for backwards compatibility. The
7723 following line terminators are recognized: LF CRLF CR. However, special
7724 processing applies to CR:
7726 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7727 nor a local message in the state where . is a terminator.
7729 (ii) If a bare CR is encountered in a header line, an extra space is added
7730 after the line terminator so as not to end the header. The reasoning
7731 behind this is that bare CRs in header lines are most likely either
7732 to be mistakes, or people trying to play silly games.
7734 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7735 was being incorrectly given as 18 bytes larger than it should have been.
7736 This is a VOB (very old bug).
7738 60. This may never have affected anything current, but just in case it has:
7739 When the local host is found other than at the start of a list of hosts,
7740 the local host, those with the same MX, and any that follow, are discarded.
7741 When the list in question was part of a longer list of hosts, the following
7742 hosts (not currently being processed) were also being discarded. This no
7743 longer happens. I'm not sure if this situation could ever has previously
7746 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7749 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7750 header. This is something that is recommended in a new Internet Draft, and
7751 is something that is documented as being done by Sendmail. There are two
7752 possible values. For messages generated by the autoreply transport, Exim
7755 Auto-Submitted: auto-replied
7757 whereas for all other generated messages (e.g. bounces) it adds
7759 Auto-Submitted: auto-generated
7761 63. The "personal" condition in filters now includes a test for the
7762 Auto-Submitted: header. If it contains the string "auto-" the message it
7763 not considered personal.
7765 64. Added rcpt_include_affixes as a generic transport option.
7767 65. Added queue_only_override (default true).
7769 66. Added the syslog_duplication option.
7771 67. If what should have been the first header line of a message consisted of
7772 a space followed by a colon, Exim was mis-interpreting it as a header line.
7773 It isn't of course - it is syntactically invalid and should therefore be
7774 treated as the start of the message body. The misbehaviour could have
7775 caused a number of strange effects, including loss of data in subsequent
7776 header lines, and spool format errors.
7778 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7779 client host had authenticated. This control can now be exercised by an ACL
7780 for more flexibility.
7782 69. By default, callouts do not happen when testing with -bh. There is now a
7783 variant, -bhc, which does actually run the callout code, including
7784 consulting and updating the callout cache.
7786 70. Added support for saslauthd authentication, courtesy of Alexander
7789 71. If statvfs() failed on the spool or log directories while checking their
7790 size for availability, Exim confusingly gave the error "space shortage".
7791 Furthermore, in debugging mode it crashed with a floating point exception.
7792 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7793 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7794 serious problem, Exim now writes to the main and panic logs when this
7795 happens, with details of the failure. It then refuses to accept the
7796 incoming message, giving the message "spool directory problem" or "log
7797 directory problem" with a 421 code for SMTP messages.
7799 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7800 0, 1, and 2 exist, because some OS complain for execs without them (see
7801 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7802 descriptors. However, the code omitted to check that the open succeeded,
7803 causing mysterious errors if for some reason the permissions on /dev/null
7804 got screwed. Now Exim writes a message to the main and panic logs, and
7805 bombs out if it can't open /dev/null.
7807 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7808 interact so that it is all more flexible. It is supposed to remain
7809 backwards compatible. Also added extra_local_interfaces.
7811 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7812 to bomb out with an assertion failure - to the client this appears as a
7813 connection drop. This problem occurs in the part of the code that was taken
7814 from the Samba project. Fortunately, the assertion is in a very simple
7815 function, so I have fixed this by reproducing the function inline in the
7816 one place where it is called, and arranging for authentication to fail
7817 instead of killing the process with assert().
7819 75. The SPA client code was not working when the server requested OEM rather
7820 than Unicode encoding.
7822 76. Added code to make require_files with a specific uid setting more usable in
7823 the case where statting the file as root fails - usually a non-root-mounted
7824 NFS file system. When this happens and the failure is EACCES, Exim now
7825 forks a subprocess and does the per-uid checking as the relevant uid.
7827 77. Added process_log_path.
7829 78. If log_file_path was not explicitly set, a setting of check_log_space or
7830 check_log_inodes was ignored.
7832 79. If a space check for the spool or log partitions fails, the incident is now
7833 logged. Of course, in the latter case the data may get lost...
7835 80. Added the %p formatting code to string_format() so that it can be used to
7836 print addresses in debug_print(). Adjusted all the address printing in the
7837 debugging in store.c to use %p rather than %d.
7839 81. There was a concern that a line of code in smtp_in.c could overflow a
7840 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7841 initially expressed, the concern was not well-founded, because trailing
7842 spaces are removed early. However, if the trailing spaces were followed by
7843 a NULL, they did not get removed, so the overflow was possible. Two fixes
7846 (a) I re-wrote the offending code in a cleaner fashion.
7847 (b) If an incoming SMTP command contains a NULL character, it is rejected
7850 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7851 runs initgroups(), so that if the Exim user is in any additional groups,
7852 they will be used during message reception.
7858 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob