1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
6 Since Exim version 4.94
7 -----------------------
9 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
10 as arguments, so an implementation trying to copy these into a local
11 buffer was taking a taint-enforcement trap. Fix by using dynamically
12 created buffers. Similar fix for radius expansion condition.
14 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
15 reasonable, eg. to count headers. Fix by using dynamically created
16 buffers rather than a local. Do similar fixes for ACL actions "dcc",
17 "log_reject_target", "malware" and "spam"; the arguments are expanded
18 so could be handling tainted values.
20 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
21 broken the (no-op) support for this sendmail command. Restore it
22 to doing nothing, silently, and returning good status.
24 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
25 record path was given (or the default used) without a leading directory
26 path, an error occurred on trying to open it. Use the transport's working
29 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
30 transport. Previously it was the name on the DNS A-record; use instead
31 the head of the CNAME chain leading there (if there is one). This seems
32 to align better with RFC 6125.
34 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
35 smtp_accept_max_per_host allocated resources which were not released
36 when the limit was exceeded. This eventually crashed the daemon. Fix
37 by adding a relase action in that path.
39 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
40 expanded; previously using tainted values was rejected. Fix by using
41 dynamically-created buffers.
43 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
44 Previously a macro used one argument twice; when called with the
45 argument as an expression having side-effects, incorrect operation
46 resulted. Use an inlineable function.
48 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
49 held open for a verify callout. Previously this wan not accounted for
50 and a corrupt onward SMTP conversation resulted.
52 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
53 excluded, not matching the documentation.
55 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
56 was given for the sqlite_dbfile a trap resulted.
58 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
59 "name" argument resulted in a trap. There is no reason to disallow such;
60 this was a coding error.
62 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
63 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
64 spent suspended, ignoring the Posix definition. Previously we assumed
65 it did and a constant offset from real time could be used as a correction.
66 Change to using the same clock source for the start-of-message and the
67 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
68 exists, just to get a clock slightly more aligned to reality.
70 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
71 RFC says it is optional some validators care. The missing char was not
72 intended but triggered by a line-wrap alignement. Discovery and fix by
73 Guillaume Outters, hacked on by JH.
75 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
76 name being quoted was tainted a trap would be taken. Fix by using
77 dynamicaly created buffers. The routine could have been called by a
78 rewrite with the "h" flag, by using the "-F" command-line option, or
79 by using a "name=" option on a control=submission ACL modifier.
81 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
82 Previously when a whitespace character was specified it was not inserted
83 after removing the newline.
89 JH/01 Avoid costly startup code when not strictly needed. This reduces time
90 for some exim process initialisations. It does mean that the logging
91 of TLS configuration problems is only done for the daemon startup.
93 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
95 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
96 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
99 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
100 DKIM signing is being done. Previously a transport_filter would always
101 disable CHUNKING, falling back to traditional DATA.
103 JH/05 Regard command-line receipients as tainted.
105 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
107 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
108 PAM library frees one of the arguments given to it, despite the
109 documentation. Therefore a plain malloc must be used.
111 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
112 on-stack buffers were used, resulting in a taint trap when DSN information
113 copied from a received message was written into the buffer.
115 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
116 the ordering of its ARC headers. This caused a crash.
118 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
119 a new record was being constructed with information from the peer, a trap
122 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
123 installation would get error messages from DMARC verify, when it hit the
124 nonexistent file indicated by the default. Distros wanting DMARC enabled
125 should both provide the file and set the option.
126 Also enforce no DMARC verification for command-line sourced messages.
128 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
129 could, depending on the platform, hang at the STARTTLS response.
131 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
132 message on a connection. Previously if one message had ARC headers and
133 the following one did not, a crash could result when adding an
134 Authentication-Results: header.
136 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
137 Exim main code and Exim-related utities. The introduction of taint
138 tracking also did many adjustments to string handling. Since then, eximon
139 frequently terminated with an assert failure.
141 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
142 check for 452 responses. This slightly helps the inefficieny of doing
143 a large alias-expansion into a recipient-limited target. The max_rcpt
144 transport option still applies (and at the current default, will override
145 the new feature). The check is done for either cause of synch, and forces
146 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
147 connection. The new facility is not tunable at this time.
149 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
150 library live data was being used, so the results became garbage. Make
151 copies while it is still usable.
153 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
154 on delivery deferred (==) and failed (**) lines (if a delivery was
155 attemtped). Previously it was only on completion (=>) lines.
157 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
158 for the expansion of the server_scram_iter and server_scram_salt options.
160 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
161 are now specifically given a NO_DATA response without hitting the system
162 resolver. The library goes on to do the now-standard TXT lookup.
163 Use of dnsdb lookups is not affected.
165 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
166 only retrieve the errormessage once. Previously two calls to dlerror()
167 were used, and the second one (for mainlog/paniclog) retrieved null
170 JH/20 Taint checking: disallow use of tainted data for
171 - the appendfile transport file and directory options
172 - the pipe transport command
173 - the autoreply transport file, log and once options
174 - file names used by the redirect router (including filter files)
176 - paths used by single-key lookups
177 Previously this was permitted.
179 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
180 adjusted the size of a major service buffer; this failed because the
181 buffer was in use at the time. Change to a compile-time increase in the
182 buffer size, when this authenticator is compiled into exim.
184 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
185 previous fast-mode was untenable in the face of glibs using mmap to
186 support larger malloc requests.
188 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
189 New values supported, if defined on system where compiled:
190 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
191 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
193 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
194 running a limited number of proceses in parallel, a benefit is gained. The
195 amount varies with the platform hardware and load. The use of the option
196 queue_run_in_order means we cannot do this, as ordering becomes
199 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
200 had introduced a string-copy (for ensuring NUL-termination) which was not
201 appropriate for that case, which can include embedded NUL bytes in the
202 block of data. Investigation showed the copy to actually be needless, the
203 data being length-specified.
205 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
206 done during a receiving connection, and both used TLS, global info was
207 used rather than per-connection info for tracking the state of data
208 queued for transmission. This could result in a connection hang.
210 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
211 Previously, when delivering serveral messages down a single connection
212 only the first would provide a SIZE. This was due to the size information
213 not being properly tracked.
215 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
216 TAI (at 37 seconds currently), pretend to be in UTC for time-related
217 expansion and logging. Previously, spurious values such as a future
218 minute could be seen.
220 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
221 it could crash from a null-deref. This could also affect the
222 ${addresses: } operator and ${readsock } item.
224 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
225 message following a mime one, the variable was not reset.
227 JH/30 When an pipelined-connect fails at the first response, assume incorrect
228 cached capability (perhaps the peer reneged?) and immediately retry in
231 JH/31 Fix spurious detection of timeout while writing to transport filter.
233 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
234 an attempt to copy the string was made before checking it.
236 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
237 taint of the lookup key was maintained; we now regard the presence in the
238 filesystem as sufficient validation.
240 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
241 argument is supplied.
243 JH/35 The dsearch lookup now requires that the directory is an absolute path.
244 Previously this was not checked, and nonempty relative paths made an
245 access under Exim's current working directory.
247 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
248 Previously no event was raised.
250 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
251 parameter supplied by the sender MAIL FROM command. Previously it was
252 ignored, and only the check_spool_space option value for the required
255 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
256 the size of the signing public-key. Previously it was instead giving
257 the size of the signature hash.
259 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
260 the default. See the (new) dkim_verify_min_keysizes option.
262 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
263 and an ACL use a lookup for checking either the local_part or domain,
264 stale data could be accessed. Ensure that variable references are
265 dropped between messages.
267 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
268 by the client was not checked as pointing within response data before
269 being used. A malicious client could thus cause an out-of-bounds read and
270 possibly gain authentication. Fix by adding the check.
272 JH/42 Internationalisation: change the default for downconversion in the smtp
273 transport to be "if needed". Previously it was "as previously set" for
274 the message, which usually meant "if needed" for message-submission but
275 "no" for everything else. However, MTAs have been seen using SMTPUTF8
276 even when the envelope addresses did not need it, resulting in forwarding
277 failures to non-supporting MTAs. A downconvert in such cases will be
278 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
279 transport. The change does mean that addresses needing conversion will
280 be converted when previously a delivery failure would occur.
282 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
283 response was received it would be used unchecked in a fail-DSN, violating
284 standards on line-length limits. Truncate if needed.
286 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
287 doesn't work. (Additionally add a new main config option to configure the
294 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
295 side, to decode a TLS 1.3 packet capture.
297 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
298 Previously the default library behaviour applied, sending two, each in
301 JH/03 Debug output for ACL now gives the config file name and line number for
304 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
306 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
308 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
309 buffer overrun for (non-chunking) other transports.
311 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
312 TLS1.3, means that a server rejecting a client certificate is not visible
313 to the client until the first read of encrypted data (typically the
314 response to EHLO). Add detection for that case and treat it as a failed
315 TLS connection attempt, so that the normal retry-in-clear can work (if
316 suitably configured).
318 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
319 and/or domain. Found and fixed by Jason Betts.
321 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
322 configuration). If a CNAME target was not a wellformed name pattern, a
325 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
326 the OS reports them interleaved with other addresses.
328 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
329 used both for input and for a verify callout, both encrypted, SMTP
330 responses being sent by the server could be lost. This resulted in
331 dropped connections and sometimes bounces generated by a peer sending
334 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
335 string. Previously it was possible to cause undefined behaviour in a
336 library routine (usually a crash). Found by "zerons".
338 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
341 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
342 API was removed, so update to use the newer ones.
344 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
345 any timeout set, is taking a long time. Previously we would hang on to a
346 rotated logfile "forever" if the input was arriving with long gaps
347 (a previous attempt to fix addressed lack, for a long time, of initial
350 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
351 shared (NFS) environment. The length of the tempfile name is now
352 4 + 16 ("hdr.$message_exim_id") which might break on file
353 systems which restrict the file name length to lower values.
356 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
357 shared (NFS) environment.
359 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
360 did for all versions <4.90). Notably -M, -m, --invert, -I may be
363 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
364 on some platforms for bit 31.
366 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
367 to changes apparently associated with TLS1.3 handling some of the APIs
368 previously used were either nonfunctional or inappropriate. Strings
369 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
370 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
371 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
372 This affects log line X= elements, the $tls_{in,out}_cipher variables,
373 and the use of specific cipher names in the encrypted= ACL condition.
375 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
377 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
378 verification result was not updated unless hosts_require_ocsp applied.
380 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
381 queue_list_requires_admin set to false, non-admin users were denied the
384 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
385 directory-of-certs mode. Previously they were advertised despite the
388 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
389 A single TCP connection by a client will now hold a TLS connection open
390 for multiple message deliveries, by default. Previously the default was to
393 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
394 default. If built with the facility, DANE will be used. The facility
395 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
397 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
398 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
399 must be defined and you must still, unless you define DISABLE_TLS, manage
400 the the include-dir and library-file requirements that go with that
401 choice. Non-TLS builds are still supported.
403 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
406 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
407 default. If the platform supports and has the facility enabled, it will
408 be requested on all coneections.
410 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
411 controlled by the build-time option SUPPORT_PIPE_CONNECT.
413 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
415 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
416 success-DSN messages. Previously the From: header was always the default
417 one for these; the option was ignored.
419 JH/28 Fix the timeout on smtp response to apply to the whole response.
420 Previously it was reset for every read, so a teergrubing peer sending
421 single bytes within the time limit could extend the connection for a
422 long time. Credit to Qualsys Security Advisory Team for the discovery.
424 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
425 delivery address, which leaked information of the results of local
426 forwarding. Change to the original envelope recipient address, per
429 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
430 requested. Previously not bounce was generated and a log entry of
431 error ignored was made.
433 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
435 JH/32 Introduce a general tainting mechanism for values read from the input
436 channel, and values derived from them. Refuse to expand any tainted
437 values, to catch one form of exploit.
439 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
440 was unused and the unexpanded text used for the test. Found and
441 fixed by Ruben Jenster.
443 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
444 an attempt to use a TLS library read routine dereffed a nul pointer,
447 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
448 them in our smtp response.
450 JH/36 Have the general router option retry_use_local_part default to true when
451 any of the restrictive preconditions are set (to anything). Previously it
452 was only for check_local user. The change removes one item of manual
453 configuration which is required for proper retries when a remote router
454 handles a subset of addresses for a domain.
456 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
457 link count into consideration.
459 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
460 caused the extension of big_buffer, the following lines were ignored.
462 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
463 accordance with RFC 2308. Previously there was no expiry, so a longlived
464 receive process (eg. due to ACL delays) versus a short SOA value could
467 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
469 JH/39 Promote DMARC support to mainline.
471 JH/40 Bug 2452: Add a References: header to DSNs.
473 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
474 parameters. The relevant library call is documented as "Deprecated: This
475 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
476 3.6.0, DH parameters are negotiated following RFC7919."
478 HS/06 Change the default of dnssec_request_domains to "*"
480 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
481 carried on and emitted a BDAT command, even when PIPELINING was not
484 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
485 buffer was used for the filename, resulting in a trap when tainted
486 arguments (eg. $domain) were used.
488 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
489 recommended to avoid a possible server-load attack. The feature can be
490 re-enabled via the openssl_options main cofiguration option.
492 JH/45 local_scan API: documented the current smtp_printf() call. This changed
493 for version 4.90 - adding a "more data" boolean to the arguments.
494 Bumped the ABI version number also, this having been missed previously;
495 release versions 4.90 to 4.92.3 inclusive were effectively broken in
496 respect of usage of smtp_printf() by either local_scan code or libraries
497 accessed via the ${dlfunc } expansion item. Both will need coding
498 adjustment for any calls to smtp_printf() to match the new function
499 signature; a FALSE value for the new argument is always safe.
501 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
502 the file-offset (which the Linux syscall does, and exim expects); this
503 resulted in an indefinite loop.
505 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
506 to do ARC verification. The Authentication-Results: header line added
507 by the configuration then had no ARC item.
513 JH/01 Remove code calling the customisable local_scan function, unless a new
514 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
516 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
517 non-signal-safe functions being used.
519 JH/03 Bug 2269: When presented with a received message having a stupidly large
520 number of DKIM-Signature headers, disable DKIM verification to avoid
521 a resource-consumption attack. The limit is set at twenty.
523 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
524 report of oldest_pass in ${authres } in consequence, and separate out
525 some descriptions of reasons for verification fail.
527 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
528 files in the spool were present and unlocked. A queue-runner could spot
529 them, resulting in a duplicate delivery. Fix that by doing the unlock
530 after the unlink. Investigation by Tim Stewart. Take the opportunity to
531 add more error-checking on spoolfile handling while that code is being
534 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
535 No known attacks, no CVE, this is defensive hardening.
537 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
538 a queue-runner could start a delivery while other operations were ongoing.
539 Cutthrough delivery was a common victim, resulting in duplicate delivery.
540 Found and investigated by Tim Stewart. Fix by using the open message data
541 file handle rather than opening another, and not locally closing it (which
542 releases a lock) for that case, while creating the temporary .eml format
543 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
545 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
546 $sender_verify_failure/$recipient_verify_failure to "random".
548 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
551 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
552 Previously this would segfault.
554 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
557 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
558 like zero, since the resolver should be doing this for us, But we need one
559 as a CNAME but no MX presence gets the CNAME returned; we need to check
560 that doesn't point to an MX to declare it "no MX returned" rather than
561 "error, loop". A new main option is added so the older capability of
562 following some limited number of chain links is maintained.
564 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
566 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
567 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
568 now-deprecated earlier definitions used only specified the range up to TLS
569 1.2 (in the older-version library docs).
571 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
573 JH/15 Rework TLS client-side context management. Stop using a global, and
574 explicitly pass a context around. This enables future use of TLS for
575 connections to service-daemons (eg. malware scanning) while a client smtp
576 connection is using TLS; with cutthrough connections this is quite likely.
578 JH/16 Fix ARC verification to do AS checks in reverse order.
580 JH/17 Support a "tls" option on the ${readsocket } expansion item.
582 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
583 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
584 Previously the "utf8" would be re-prepended for every additional message.
586 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
587 Previously thery were accepted, resulting in issues when attempting to
588 forward messages to a non-supporting MTA.
590 PP/02 Let -n work with printing macros too, not just options.
592 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
593 one parent address was copied, and bogus data was used at delivery-logging
594 time. Either a crash (after delivery) or bogus log data could result.
595 Discovery and analysis by Tim Stewart.
597 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
598 Previously if the string ended mid-character, we did not insert the
599 promised '?' replacement.
601 PP/04 Documentation: current string operators work on bytes, not codepoints.
603 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
604 should pack well giving a smaller memory footprint so better caching and
605 therefore performance. Group the declarations where this can't be done so
606 that the byte-sized flag variables are not interspersed among pointer
607 variables, giving a better chance of good packing by the compiler.
609 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
610 non-null, to avoid issues with sites running BATV. Previously reports were
611 sent with an empty envelope sender so looked like bounces.
613 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
614 The ignore_error flag wasn't being returned from the filter subprocess so
615 was not set for later routers. Investigation and fix by Matthias Kurz.
617 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
618 and a msg:complete for the whole, when a message is manually removed using
619 -Mrm. Developement by Matthias Kurz, hacked on by JH.
621 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
622 a "Gnu special" function, asprintf() in the DB utility binary builds; I
623 hope that is portable enough.
625 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
626 requiring a known-CA anchor certificate; make it now rely entirely on the
627 TLSA as an anchor. Checking the name on the leaf cert against the name
628 on the A-record for the host is still done for TA (but not for EE mode).
630 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
631 included in delivery lines for non-proxied connections, when compiled with
632 SUPPORT_SOCKS and running with proxy logging enabled.
634 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
635 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
636 move the existing event to fire before the normal logging of message
637 failure so that custom logging is bracketed by normal logging.
639 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
640 msg:fail:internal event. Developement by Matthias Kurz.
642 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
643 far too small for todays use of crypto signatures stored there. Go all
644 the way to the max DNS message size of 64kB, even though this might be
645 overmuch for IOT constrained device use.
647 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
648 copy a string over itself. The library routine is documented as not
649 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
651 JH/32 For main options check_spool_space and check_inode_space, where the
652 platform supports 64b integers, support more than the previous 2^31 kB
653 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
654 the previous G, M, k.
656 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
657 $authenticated_fail_id variable on authentication failure. Previously
660 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
661 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
662 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
663 GNUTLS_SEC_PARAM_MEDIUM.
665 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
666 side. Previously we would continue as if no SNI had been received.
668 JH/36 Harden the handling of string-lists. When a list consisted of a sole
669 "<" character, which should be a list-separator specification, we walked
670 off past the nul-terimation.
672 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
673 causes) even when the retry time is not yet met. Previously they were
674 not, meaning that when (say) an account was over-quota and temp-rejecting,
675 and multiple senders' messages were queued, only one sender would get
676 notified on each configured delay_warning cycle.
678 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
680 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
681 cipher-suites, an error can be left on the stack even for a succeeding
682 accept; this results in impossible error messages when a later operation
685 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
686 return error codes indicating retry. Under TLS1.3 this becomes required.
688 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
689 it only wrote the new authenticators, resulting in a lack of tracking of
690 peer changes of ESMTP extensions until the next cache flush.
692 JH/41 Fix the loop reading a message header line to check for integer overflow,
693 and more-often against header_maxsize. Previously a crafted message could
694 induce a crash of the recive process; now the message is cleanly rejected.
696 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
697 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
703 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
704 When redis_servers is set to a list of > 1 element, and the Redis servers
705 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
706 case of MOVED into a DEFER case instead, thus moving the query onto the
707 next server in the list. For a cluster of N elements, all N servers must
708 be defined in redis_servers.
710 GF/02 Catch and remove uninitialized value warning in exiqsumm
711 Check for existence of @ARGV before looking at $ARGV[0]
713 JH/01 Replace the store_release() internal interface with store_newblock(),
714 which internalises the check required to safely use the old one, plus
715 the allocate and data copy operations duplicated in both (!) of the
716 extant use locations.
718 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
719 modifier. This matches the restriction on the commandline.
721 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
722 Previously only the last row was returned.
724 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
725 we assumed that tags in the header were well-formed, and parsed the
726 element content after inspecting only the first char of the tag.
727 Assumptions at that stage could crash the receive process on malformed
730 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
731 While running the DKIM ACL we operate on the Permanent memory pool so that
732 variables created with "set" persist to the DATA ACL. Also (at any time)
733 DNS lookups that fail create cache records using the Permanent pool. But
734 expansions release any allocations made on the current pool - so a dnsdb
735 lookup expansion done in the DKIM ACL releases the memory used for the
736 DNS negative-cache, and bad things result. Solution is to switch to the
737 Main pool for expansions.
738 While we're in that code, add checks on the DNS cache during store_reset,
739 active in the testsuite.
740 Problem spotted, and debugging aided, by Wolfgang Breyha.
742 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
743 When none of the hosts presented to a transport match an already-open
744 connection, close it and proceed with the list. Previously we would
745 queue the message. Spotted by Lena with Yahoo, probably involving
748 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
749 Previously a spurious "250 OK id=" response was appended to the proper
752 JH/08 The "support for" informational output now, which built with Content
753 Scanning support, has a line for the malware scanner interfaces compiled
754 in. Interface can be individually included or not at build time.
756 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
757 by the template makefile "src/EDITME". The "STREAM" support for an older
758 ClamAV interface method is removed.
760 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
761 rows affected is given instead).
763 JH/11 The runtime Berkeley DB library version is now additionally output by
764 "exim -d -bV". Previously only the compile-time version was shown.
766 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
767 SMTP connection. Previously, when one had more receipients than the
768 first, an abortive onward connection was made. Move to full support for
769 multiple onward connections in sequence, handling cutthrough connection
770 for all multi-message initiating connections.
772 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
773 routers. Previously, a multi-recipient message would fail to match the
774 onward-connection opened for the first recipient, and cause its closure.
776 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
777 a timeout on read on a GnuTLS initiating connection, resulting in the
778 initiating connection being dropped. This mattered most when the callout
779 was marked defer_ok. Fix to keep the two timeout-detection methods
782 JH/15 Relax results from ACL control request to enable cutthrough, in
783 unsupported situations, from error to silently (except under debug)
784 ignoring. This covers use with PRDR, frozen messages, queue-only and
787 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
789 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
790 metadata, resulting in a crash in free().
792 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
793 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
794 Broken also in d185889f4, with init system revamp.
796 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
797 Previously we abruptly closed the connection after reading a malware-
798 found indication; now we go on to read the "scan ok" response line,
801 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
802 ACL. Previously, a crash would result.
804 JH/19 Speed up macro lookups during configuration file read, by skipping non-
805 macro text after a replacement (previously it was only once per line) and
806 by skipping builtin macros when searching for an uppercase lead character.
808 JH/20 DANE support moved from Experimental to mainline. The Makefile control
809 for the build is renamed.
811 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
812 was allocated for every new TLS startup, meaning one per message. Fix
813 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
815 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
816 reported the original. Fix to report (as far as possible) the ACL
817 result replacing the original.
819 JH/23 Fix memory leak during multi-message connections using STARTTLS under
820 OpenSSL. Certificate information is loaded for every new TLS startup,
821 and the resources needed to be freed.
823 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
825 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
828 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
829 DATA response info to the (existing) per-recipient response info for
830 the "C=" log element. It can have useful tracking info from the
831 destination system. Patch from Simon Arlott.
833 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
834 length value. Previously this would segfault.
836 HS/02 Support Avast multiline protoocol, this allows passing flags to
837 newer versions of the scanner.
839 JH/28 Ensure that variables possibly set during message acceptance are marked
840 dead before release of memory in the daemon loop. This stops complaints
841 about them when the debug_store option is enabled. Discovered specifically
842 for sender_rate_period, but applies to a whole set of variables.
843 Do the same for the queue-runner and queue-list loops, for variables set
844 from spool message files. Do the same for the SMTP per-message loop, for
845 certain variables indirectly set in ACL operations.
847 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
848 as a multi-recipient message from a mailinglist manager). The coding had
849 an arbitrary cutoff number of characters while checking for more input;
850 enforced by writing a NUL into the buffer. This corrupted long / fast
851 input. The problem was exposed more widely when more pipelineing of SMTP
852 responses was introduced, and one Exim system was feeding another.
853 The symptom is log complaints of SMTP syntax error (NUL chars) on the
854 receiving system, and refused recipients seen by the sending system
855 (propating to people being dropped from mailing lists).
856 Discovered and pinpointed by David Carter.
858 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
859 replaced by the ${authresults } expansion.
861 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
863 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
864 allows proper process termination in container environments.
866 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
867 Previously the "final dot" had a newline after it; ensure it is CR,LF.
869 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
870 and "err_perm", deprecated since 4.83 when the RFC-defined words
871 "temperror" and "permerror" were introduced.
873 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
874 transport-filters or DKIM-signing. The restriction was lost in the
875 consolidation of verify-callout and delivery SMTP handling.
876 Extend the restriction to also cover ARC-signing.
878 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
879 in defer=pass mode supply a 450 to the initiator. Previously the message
882 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
883 tls_require_ciphers is used as before.
885 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
886 "pass_unscanned". Only tmpfails from the scanner are written to
887 the paniclog, as they may require admin intervention (permission
888 denied, license issues). Other scanner errors (like decompression
889 bombs) do not cause a paniclog entry.
891 JH/36 Fix reinitialisation of DKIM logging variable between messages.
892 Previously it was possible to log spurious information in receive log
895 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
896 triggered odd behaviour from Outlook Express clients.
898 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
901 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
902 since the IETF WG has not yet settled on that versus the original
903 "bare" representation.
905 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
906 Previously the millisecond value corrupted the output.
907 Fix also for syslog_pid=no and log_selector +pid, for which the pid
908 corrupted the output.
914 JH/01 Rework error string handling in TLS interface so that the caller in
915 more cases is responsible for logging. This permits library-sourced
916 string to be attached to addresses during delivery, and collapses
917 pairs of long lines into single ones.
919 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
920 during configuration. Wildcards are allowed and expanded.
922 JH/02 Rework error string handling in DKIM to pass more info back to callers.
923 This permits better logging.
925 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
926 do not close it down and have the child transport start it up again on
927 the passed-on TCP connection. Instead, proxy the child (and any
928 subsequent ones) for TLS via a unix-domain socket channel. Logging is
929 affected: the continued delivery log lines do not have any DNSSEC, TLS
930 Certificate or OCSP information. TLS cipher information is still logged.
932 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
933 identical IP addresses on different listening ports. Will also affect
936 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
937 add noisy ifdef guards to special-case this sillyness.
938 Patch from Bernd Kuhls.
940 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
941 than 255 are no longer allowed.
943 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
944 Disable the session-cache too, which might reduce our load. Since we
945 currrectly use a new context for every connection, both as server and
946 client, there is no benefit for these.
947 GnuTLS appears to not support tickets server-side by default (we don't
948 call gnutls_session_ticket_enable_server()) but client side is enabled
949 by default on recent versions (3.1.3 +) unless the PFS priority string
952 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
953 <https://reproducible-builds.org/specs/source-date-epoch/>.
955 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
956 the check for any unsuccessful recipients did not notice the limit, and
957 erroneously found still-pending ones.
959 JH/08 Pipeline CHUNKING command and data together, on kernels that support
960 MSG_MORE. Only in-clear (not on TLS connections).
962 JH/09 Avoid using a temporary file during transport using dkim. Unless a
963 transport-filter is involved we can buffer the headers in memory for
964 creating the signature, and read the spool data file once for the
965 signature and again for transmission.
967 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
968 4.77 as the kernel support then wasn't solid, having issues in 64bit
969 mode. Now, it's been long enough. Add support for FreeBSD also.
971 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
972 case where the routing stage had gathered several addresses to send to
973 a host before calling the transport for the first, we previously failed
974 to close down TLS in the old transport process before passing the TCP
975 connection to the new process. The new one sent a STARTTLS command
976 which naturally failed, giving a failed delivery and bloating the retry
977 database. Investigation and fix prototype from Wolfgang Breyha.
979 JH/12 Fix check on SMTP command input synchronisation. Previously there were
980 false-negatives in the check that the sender had not preempted a response
981 or prompt from Exim (running as a server), due to that code's lack of
982 awareness of the SMTP input buffering.
984 PP/04 Add commandline_checks_require_admin option.
985 Exim drops privileges sanely, various checks such as -be aren't a
986 security problem, as long as you trust local users with access to their
987 own account. When invoked by services which pass untrusted data to
988 Exim, this might be an issue. Set this option in main configuration
989 AND make fixes to the calling application, such as using `--` to stop
992 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
993 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
994 responses to those, into a single TLS record each way (this usually means
995 a single packet). As a side issue, smtp_enforce_sync now works on TLS
998 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
999 affects you only if you're dancing at the edge of the param size limits.
1000 If you are, and this message makes sense to you, then: raise the
1001 configured limit or use OpenSSL 1.1. Nothing we can do for older
1004 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1005 cmdline element to get the documented default one. Previously it was
1008 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1009 are unsuable for non-message-specific reasons - eg. connection timeout,
1010 banner-time rejection.
1012 JH/16 Fix logging of delivery remote port, when specified by router, under
1015 PP/06 Repair manualroute's ability to take options in any order, even if one
1016 is the name of a transport.
1019 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1021 JH/17 Change the list-building routines interface to use the expanding-string
1022 triplet model, for better allocation and copying behaviour.
1024 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1025 Previously it was constructed the first time a possibly-matching string
1026 was met in the configuration file input during startup; now it is done
1029 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1030 compatible one, to avoid the (poorly documented) possibility of a config
1031 file in the working directory redirecting the DB files, possibly correpting
1032 some existing file. CVE-2017-10140 assigned for BDB.
1034 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1035 cache-hot. Previously, although the result was properly cached, the
1036 initial verify call returned a defer.
1038 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1039 the main verify for receipient in uncached-mode.
1041 JH/22 Retire historical build files to an "unsupported" subdir. These are
1042 defined as "ones for which we have no current evidence of testing".
1044 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1045 if present. Previously it was ignored.
1047 JH/24 Start using specified-initialisers in C structure init coding. This is
1048 a C99 feature (it's 2017, so now considered safe).
1050 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1051 if was a fixed-sized field and bitmask ops via macros; it is now more
1054 PP/07 GitHub PR 56: Apply MariaDB build fix.
1055 Patch provided by Jaroslav Å karvada.
1057 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1058 during Coverity cleanups [4.87 JH/47]
1059 Diagnosis and fix provided by Michael Fischer v. Mollard.
1061 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1062 the right size to place the terminating semicolon on its own folded
1063 line, the header hash was calculated to an incorrect value thanks to
1064 the (relaxed) space the fold became.
1066 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1067 and confused the parent.
1069 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1070 which could crash as a result. This could lead to undeliverable messages.
1072 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1075 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1076 matters on fast-turnover and PID-randomising systems, which were getting
1077 out-of-order delivery.
1079 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1080 a possibly-overlapping copy. The symptom was that "Remote host closed
1081 connection in response to HELO" was logged instead of the actual 4xx
1084 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1085 Previously only that bufferd was discarded, resulting in SYMTP command
1088 JH/32 DKIM: when a message has multiple signatures matching an identity given
1089 in dkim_verify_signers, run the dkim acl once for each. Previously only
1090 one run was done. Bug 2189.
1092 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1093 "panic the current process" to "deliberately defer". The panic log is
1094 still written with the problem list name; the mail and reject logs now
1095 get a temp-reject line for the message that was being handled, saying
1096 something like "domains check lookup or other defer". The SMTP 451
1097 message is still "Temporary local problem".
1099 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1100 A crafted sequence of BDAT commands could result in in-use memory beeing
1101 freed. CVE-2017-16943.
1103 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1104 from SMTP input. Previously it was always done; now only done for DATA
1105 and not BDAT commands. CVE-2017-16944.
1107 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1108 to the message (such as an overlong header line). Previously this was
1109 not done and we did not exit BDAT mode. Followon from the previous item
1110 though a different problem.
1116 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1117 than -2003 did; needs libidn2 in addition to libidn.
1119 JH/02 The path option on a pipe transport is now expanded before use.
1121 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1122 Patch provided by "Björn", documentation fix added too.
1124 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1125 missing a wire-to-host endian conversion.
1127 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1128 close after a BDAT command line could be taken as a following command,
1129 giving a synch failure. Fix by only checking for synch immediately
1130 before acknowledging the chunk.
1132 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1133 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1134 macro. Patches provided by Josh Soref.
1136 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1137 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1138 by IANA as a service extension. However, John Klensin suggests that we
1141 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1142 the dkim code may be unix-mode line endings rather than smtp wire-format
1143 CRLF, so prepend a CR to any bare LF.
1145 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1146 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1148 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1149 the first were themselves being wrongly included in the feed into dkim
1150 processing; with most chunk sizes in use this resulted in an incorrect
1151 body hash calculated value.
1153 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1154 DKIM signature block, for verification. Although advised against by
1155 standards it is specifically not ruled illegal.
1157 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1159 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1160 missing a body hash (the bh= tag).
1162 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1163 It seems that HAProxy sends the Proxy Protocol information in clear and
1164 only then does a TLS startup, so do the same.
1166 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1167 TCP connections (such as for Spamd) unless the daemon successfully set
1168 Fast Open mode on its listening sockets. This fixes breakage seen on
1169 too-old kernels or those not configured for Fast Open, at the cost of
1170 requiring both directions being enabled for TFO, and TFO never being used
1171 by non-daemon-related Exim processes.
1173 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1174 endings, at least on the first header line. Try to canonify any that get
1175 past that check, despite the cost.
1177 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1178 now limited to an arbitrary five deep, while parsing addresses with the
1179 strip_excess_angle_brackets option enabled.
1181 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1182 instead leave the unprompted TLS handshake in socket buffer for the
1183 TLS library to consume.
1185 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1187 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1189 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1190 region in one operation, for speed, and this leaves assigned pointers
1191 dangling. Add checks run only under the testsuite which checks all
1192 variables at a store-reset and panics on a dangling pointer; add code
1193 explicitly nulling out all the variables discovered. Fixes one known
1194 bug: a transport crash, where a dangling pointer for $sending_ip_address
1195 originally assigned in a verify callout, is re-used.
1197 PP/06 Drop '.' from @INC in various Perl scripts.
1199 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1201 PP/08 Reduce a number of compilation warnings under clang; building with
1202 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1203 should be warning-free.
1205 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1207 HS/01 Fix portability problems introduced by PP/08 for platforms where
1208 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1210 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1211 chunk. This allows us to accept broken chunked messages. We need a more
1212 general solution here.
1214 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1215 already-broken messages in the queue.
1217 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1219 JH/19 Fix reference counting bug in routing-generated-address tracking.
1225 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1226 supports it and a size is available (ie. the sending peer gave us one).
1228 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1229 years of being deprecated). The replacements are the ACLs
1230 acl_smtp_mime and acl_not_smtp_mime.
1232 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1233 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1234 or even an in-clear connection were permitted. Now, if the host lookup
1235 was dnssec and dane was requested then the host is only used if the
1236 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1237 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1238 if one fails this test.
1239 This means that a poorly-configured remote DNS will make it incommunicado;
1240 but it protects against a DNS-interception attack on it.
1242 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1243 non-noisy when a race steals the message being considered.
1245 JH/05 If main configuration option tls_certificate is unset, generate a
1246 self-signed certificate for inbound TLS connections.
1248 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1249 in rewrites and routers.
1251 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1252 and logged a warning sing 4.83; now they are a configuration file error.
1254 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1255 (lacking @domain). Apply the same qualification processing as RCPT.
1257 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1259 JH/10 Support ${sha256:} applied to a string (as well as the previous
1262 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1263 a cutthrough deliver is pending, as we always want to make a connection.
1264 This also avoids re-routing the message when later placing the cutthrough
1265 connection after a verify cache hit.
1266 Do not update it with the verify result either.
1268 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1269 when routing results in more than one destination address.
1271 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1272 signing (which inhibits the cutthrough capability). Previously only
1273 the presence of an option was tested; now an expansion evaluating as
1274 empty is permissible (obviously it should depend only on data available
1275 when the cutthrough connection is made).
1277 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1278 the relevant preceding SMTP command did not note the pipelining mode.
1280 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1281 Previously they were not counted.
1283 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1284 as one having no matching records. Previously we deferred the message
1285 that needed the lookup.
1287 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1288 distinguished as "(=".
1290 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1291 for missing MX records. Previously it only worked for missing A records.
1293 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1295 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1296 after the data-go-ahead and data-ack. Patch from Jason Betts.
1298 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1299 even for a "none" policy. Patch from Tony Meyer.
1301 JH/22 Fix continued use of a connection for further deliveries. If a port was
1302 specified by a router, it must also match for the delivery to be
1305 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1306 When one of the recipients of a message was unsuitable for the connection
1307 (has no matching addresses), we lost track of needing to mark it
1308 deferred. As a result mail would be lost.
1310 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1312 JH/25 Decoding ACL controls is now done using a binary search; the source code
1313 takes up less space and should be simpler to maintain. Merge the ACL
1314 condition decode tables also, with similar effect.
1316 JH/26 Fix problem with one_time used on a redirect router which returned the
1317 parent address unchanged. A retry would see the parent address marked as
1318 delivered, so not attempt the (identical) child. As a result mail would
1321 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1322 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1323 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1326 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1327 Main config options check_{log,spool}_{inodes,space} are now
1328 100 inodes, 10MB unless set otherwise in the configuration.
1330 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1331 Previously it only applied to the main-section connection policy
1334 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1336 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1337 by me. Added RFC7919 DH primes as an alternative.
1339 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1340 are not in the system include path.
1342 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1343 GnuTLS, when a session startup failed (eg because the client disconnected)
1344 Exim did stdio operations after fclose. This was exposed by a recent
1345 change which nulled out the file handle after the fclose.
1347 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1348 signed directly by the cert-signing cert, rather than an intermediate
1349 OCSP-signing cert. This is the model used by LetsEncrypt.
1351 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1353 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1354 an incoming connection.
1356 HS/02 Bug 1802: Do not half-close the connection after sending a request
1359 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1360 fallback to "prime256v1".
1362 JH/34 SECURITY: Use proper copy of DATA command in error message.
1363 Could leak key material. Remotely exploitable. CVE-2016-9963.
1369 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1370 and 3.4.4 - once the server is enabled to respond to an OCSP request
1371 it does even when not requested, resulting in a stapling non-aware
1372 client dropping the TLS connection.
1374 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1375 support variable-length bit vectors. No functional change.
1377 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1378 The I= interface field on outgoing lines is now after the H= remote
1379 host field, same as incoming lines. There is a separate
1380 outgoing_interface log selector which allows you to disable the
1383 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1384 If not running log_selector +smtp_connection the mainlog would be held
1385 open indefinitely after a "too many connections" event, including to a
1386 deleted file after a log rotate. Leave the per net connection logging
1387 leaving it open for efficiency as that will be quickly detected by the
1388 check on the next write.
1390 HS/01 Bug 1671: Fix post transport crash.
1391 Processing the wait-<transport> messages could crash the delivery
1392 process if the message IDs didn't exist for some reason. When
1393 using 'split_spool_directory=yes' the construction of the spool
1394 file name failed already, exposing the same netto behaviour.
1396 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1397 mime_regex ACL conditions.
1399 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1400 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1401 to HELO, local diagnostic string.
1403 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1404 log line to debug. Even when configured with a tls authenticator many
1405 client connections are expected to not authenticate in this way, so
1406 an authenticate fail is not an error.
1408 HS/02 Add the Exim version string to the process info. This way exiwhat
1409 gives some more detail about the running daemon.
1411 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1412 matter for fast-change records such as DNSBLs.
1414 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1415 retry record, even if constant. There may be multiple transports with
1416 different interface settings and the retry behaviour needs to be kept
1419 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1421 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1423 JH/10 Bug 840: fix log_defer_output option of pipe transport
1425 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1426 hosts_randomize. This matters a lot when combined with mua_wrapper.
1428 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1429 ${quote_pgsql:<string>} operator.
1431 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1433 JH/14 Change header file name for freeradius-client. Relevant if compiling
1434 with Radius support; from the Gentoo tree and checked under Fedora.
1436 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1438 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1439 option transport_filter, meaning no filtering.
1441 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1443 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1444 defaults to "*" (all hosts). The variable is now available when not built
1445 with TLS, default unset, mainly to enable keeping the testsuite sane.
1446 If a server certificate is not supplied (via tls_certificate) an error is
1447 logged, and clients will find TLS connections fail on startup. Presumably
1448 they will retry in-clear.
1449 Packagers of Exim are strongly encouraged to create a server certificate
1450 at installation time.
1452 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1453 with the $config_file variable.
1455 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1456 in transport context, after the attempt, and per-recipient. The latter type
1457 is per host attempted. The event data is the error message, and the errno
1458 information encodes the lookup type (A vs. MX) used for the (first) host,
1459 and the trailing two digits of the smtp 4xx response.
1461 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1462 to write to mainlog (or rejectlog, paniclog) in the window between file
1463 creation and permissions/ownership being changed. Particularly affects
1464 installations where exicyclog is run as root, rather than exim user;
1465 result is that the running daemon panics and dies.
1467 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1469 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1470 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1471 "pri" and "weight". Note that the previous implicit priority given by the
1472 list order is no longer honoured.
1474 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1475 for DKIM processing.
1477 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1478 by defining SUPPORT_SOCKS.
1480 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1481 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1482 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1483 variables are renamed to proxy_{local,external}_{address,port}.
1485 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1486 for a build by defining SUPPORT_I18N
1488 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1489 of the query string, and make ${quote_redis:} do that quoting.
1491 JH/29 Move Events support from Experimental to mainline, enabled by default
1492 and removable for a build by defining DISABLE_EVENT.
1494 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1496 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1497 cached by the daemon.
1499 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1500 by defining LOOKUP_REDIS. The libhiredis library is required.
1502 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1503 keys are given for lookup.
1505 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1506 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1507 only supported when built with TLS support. The PolarSSL SHA routines
1508 are still used when the TLS library is too old for convenient support.
1510 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1511 openssl_options), for security. OpenSSL forces this from version 1.1.0
1512 server-side so match that on older versions.
1514 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1515 allocation for $value could be released as the expansion processing
1516 concluded, but leaving the global pointer active for it.
1518 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1519 and to use the domains and local_parts ACL conditions.
1521 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1522 incorrectly not doubled on cutthrough transmission, hence seen as a
1523 body-termination at the receiving system - resulting in truncated mails.
1524 Commonly the sender saw a TCP-level error, and retransmitted the message
1525 via the normal store-and-forward channel. This could result in duplicates
1526 received - but deduplicating mailstores were liable to retain only the
1527 initial truncated version.
1529 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1531 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1533 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1534 we're in there, support oversigning also; bug 1309.
1536 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1538 HS/04 Add support for keep_environment and add_environment options.
1540 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1541 either intentional arithmetic overflow during PRNG, or testing config-
1544 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1545 delivery resulted in actual delivery. Cancel cutthrough before DATA
1548 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1549 rejects a recipient: pass the reject to the originator.
1551 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1552 Many were false-positives and ignorable, but it's worth fixing the
1555 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1556 for the new environment-manipulation done at startup. Move the routines
1557 from being local to tls.c to being global via the os.c file.
1559 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1560 an extract embedded as result-arg for a map, the first arg for extract
1561 is unavailable so we cannot tell if this is a numbered or keyed
1562 extraction. Accept either.
1568 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1571 JH/02 The smtp transport option "multi_domain" is now expanded.
1573 JH/03 The smtp transport now requests PRDR by default, if the server offers
1576 JH/04 Certificate name checking on server certificates, when exim is a client,
1577 is now done by default. The transport option tls_verify_cert_hostnames
1578 can be used to disable this per-host. The build option
1579 EXPERIMENTAL_CERTNAMES is withdrawn.
1581 JH/05 The value of the tls_verify_certificates smtp transport and main options
1582 default to the word "system" to access the system default CA bundle.
1583 For GnuTLS, only version 3.0.20 or later.
1585 JH/06 Verification of the server certificate for a TLS connection is now tried
1586 (but not required) by default. The verification status is now logged by
1587 default, for both outbound TLS and client-certificate supplying inbound
1590 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1593 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1594 Status Notification (bounce) messages are now MIME format per RFC 3464.
1595 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1596 under the control of the dsn_advertise_hosts option, and routers may
1597 have a dsn_lasthop option.
1599 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1600 default, modifiable by a malware= option. The list separator for
1601 the options can now be changed in the usual way. Bug 68.
1603 JH/10 The smtp_receive_timeout main option is now expanded before use.
1605 JH/11 The incoming_interface log option now also enables logging of the
1606 local interface on delivery outgoing connections.
1608 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1609 if the interface and destination host and port all match.
1611 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1614 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1615 Patch from Andrew Lewis.
1617 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1618 now supports optional time-restrictions, weighting, and priority
1619 modifiers per server. Patch originally by <rommer@active.by>.
1621 JH/16 The spamd_address main option now supports a mixed list of local
1622 and remote servers. Remote servers can be IPv6 addresses, and
1623 specify a port-range.
1625 JH/17 Bug 68: The spamd_address main option now supports an optional
1626 timeout value per server.
1628 JH/18 Bug 1581: Router and transport options headers_add/remove can
1629 now have the list separator specified.
1631 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1634 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1637 JH/21 Support for the A6 type of dns record is withdrawn.
1639 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1640 rather than the verbs used.
1642 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1643 from 255 to 1024 chars.
1645 JH/24 Verification callouts now attempt to use TLS by default.
1647 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1648 are generic router options now. The defaults didn't change.
1650 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1651 Original patch from Alexander Shikoff, worked over by JH.
1653 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1654 files if ZCAT_COMMAND is not executable.
1656 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1658 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1660 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1661 Normally benign, it bites when the pair was led to by a CNAME;
1662 modern usage is to not canonicalize the domain to a CNAME target
1663 (and we were inconsistent anyway for A-only vs AAAA+A).
1665 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1667 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1668 when evaluating $sender_host_dnssec.
1670 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1671 $sender_helo_dnssec variable.
1673 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1675 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1677 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1679 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1680 documented as working, but never had. Support all but $spam_report.
1682 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1683 added for tls authenticator.
1685 HS/03 Add perl_taintmode main config option
1691 TL/01 When running the test suite, the README says that variables such as
1692 no_msglog_check are global and can be placed anywhere in a specific
1693 test's script, however it was observed that placement needed to be near
1694 the beginning for it to behave that way. Changed the runtest perl
1695 script to read through the entire script once to detect and set these
1696 variables, reset to the beginning of the script, and then run through
1697 the script parsing/test process like normal.
1699 TL/02 The BSD's have an arc4random API. One of the functions to induce
1700 adding randomness was arc4random_stir(), but it has been removed in
1701 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1702 function when detected.
1704 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1705 cause callback expansion.
1707 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1708 syntax errors in an expansion can be treated as a string instead of
1709 logging or causing an error, due to the internal use of bool_lax
1710 instead of bool when processing it.
1712 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1713 server certificates when making smtp deliveries.
1715 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1717 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1719 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1721 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1722 Merged patch from Sebastian Wiedenroth.
1724 JH/05 Fix results-pipe from transport process. Several recipients, combined
1725 with certificate use, exposed issues where response data items split
1726 over buffer boundaries were not parsed properly. This eventually
1727 resulted in duplicates being sent. This issue only became common enough
1728 to notice due to the introduction of connection certificate information,
1729 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1731 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1732 size buffer was used, resulting in syntax errors when an expansion
1735 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1736 version 3.3.6 or later.
1738 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1739 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1740 both become "event_action", the variables become $event_name, $event_data
1741 and $event_defer_errno. There is a new variable $verify_mode, usable in
1742 routers, transports and related events. The tls:cert event is now also
1743 raised for inbound connections, if the main configuration event_action
1746 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1747 early OCSP support, but no stapling (appears to be less than 1.0.0).
1749 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1750 server certificate names available under the smtp transport option
1751 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1754 JH/10 Time-related extraction expansions from certificates now use the main
1755 option "timezone" setting for output formatting, and are consistent
1756 between OpenSSL and GnuTLS compilations. Bug 1541.
1758 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1759 encoded parameter in the incoming message. Bug 1558.
1761 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1762 include certificate info, eximon was claiming there were spoolfile
1765 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1767 JH/14 Log delivery-related information more consistently, using the sequence
1768 "H=<name> [<ip>]" wherever possible.
1770 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1771 are problematic for Debian distribution, omit them from the release
1774 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1776 JH/16 Fix string representation of time values on 64bit time_t architectures.
1779 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1780 output list separator was used.
1785 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1786 checkers that were complaining about end of non-void function with no
1789 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1790 This was a regression introduced in 4.83 by another bugfix.
1792 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1794 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1795 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1801 TF/01 Correctly close the server side of TLS when forking for delivery.
1803 When a message was received over SMTP with TLS, Exim failed to clear up
1804 the incoming connection properly after forking off the child process to
1805 deliver the message. In some situations the subsequent outgoing
1806 delivery connection happened to have the same fd number as the incoming
1807 connection previously had. Exim would try to use TLS and fail, logging
1808 a "Bad file descriptor" error.
1810 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1811 utilities have not been installed.
1813 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1814 temporary space as the ACL may create new global variables.
1816 TL/01 LDAP support uses per connection or global context settings, depending
1817 upon the detected version of the libraries at build time.
1819 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1820 to extract and use the src ip:port in logging and expansions as if it
1821 were a direct connection from the outside internet. PPv2 support was
1822 updated based on HAProxy spec change in May 2014.
1824 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1826 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1827 Properly escape header and check for NULL return.
1829 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1832 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1834 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1835 characters in header names, implemented as a verify condition.
1836 Contributed by Michael Fischer v. Mollard.
1838 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1839 results permerror and temperror. Previous values are deprecated but
1840 still accepted. In a future release, err_perm and err_temp will be
1841 completely removed, which will be a backward incompatibility if the
1842 ACL tests for either of these two old results. Patch contributed by
1843 user bes-internal on the mailing list.
1845 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1847 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1848 selectors, in both main and reject logs.
1850 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1853 JH/07 Add malware type "sock" for talking to simple daemon.
1855 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1857 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1858 routers/transports under cutthrough routing.
1860 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1861 numbers. Touch up "bool" conditional to keep the same definition.
1863 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1865 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1867 JH/12 Expand items in router/transport headers_add or headers_remove lists
1868 individually rather than the list as a whole. Bug 1452.
1870 Required for reasonable handling of multiple headers_ options when
1871 they may be empty; requires that headers_remove items with embedded
1872 colons must have them doubled (or the list-separator changed).
1874 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1875 view the policy declared in the DMARC record. Currently, $dmarc_status
1876 is a combined value of both the record presence and the result of the
1879 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1881 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1882 dnslookup router and the smtp transport (applying to the forward
1885 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1886 of ldap servers used for a specific lookup. Patch provided by Heiko
1889 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1890 New variable $lookup_dnssec_authenticated for observability.
1892 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1893 Patch submitted by Lars Timman.
1895 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1897 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1898 Requires trusted mode and valid format message id, aborts otherwise.
1899 Patch contributed by Heiko Schlichting.
1901 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1902 certextract with support for various fields. Bug 1358.
1904 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1905 is requested by default, modifiable by smtp transport option
1908 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1909 operate on certificate variables to give certificate fingerprints
1910 Also new ${sha256:cert_variable}.
1912 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1914 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1915 Christian Aistleitner.
1917 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1919 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1920 file. Patch from Wolfgang Breyha.
1922 JH/25 Expand the coverage of the delivery $host and $host_address to
1923 client authenticators run in verify callout. Bug 1476.
1925 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1926 align with daemon_smtp_ports. Bug 72.
1928 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1929 support and error reporting did not work properly.
1931 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1932 and is readable. Patch from Andrew Colin Kissa.
1934 TL/14 Enhance documentation of ${run expansion and how it parses the
1935 commandline after expansion, particularly in the case when an
1936 unquoted variable expansion results in an empty value.
1938 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1940 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1941 by renaming away from it. Addresses GH issue 15, reported by
1944 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1946 TL/15 SECURITY: prevent double expansion in math comparison functions
1947 (can expand unsanitized data). Not remotely exploitable.
1954 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1956 PP/02 Make -n do something, by making it not do something.
1957 When combined with -bP, the name of an option is not output.
1959 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1962 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1963 $sender_host_name and config options to manage this, and basic check
1966 PP/05 DSCP support for outbound connections and control modifier for inbound.
1968 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1969 (Only plugin which currently uses this is kerberos4, which nobody should
1970 be using, but we should make it available and other future plugins might
1971 conceivably use it, even though it would break NAT; stuff *should* be
1972 using channel bindings instead).
1974 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1975 name; added for Sendmail compatibility; requires admin caller.
1976 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1977 just ignore it); requires trusted caller.
1978 Also parse but ignore: -Ac -Am -X<logfile>
1981 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1983 TL/02 Add +smtp_confirmation as a default logging option.
1985 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1986 Patch by Magnus Holmgren from 2007-02-20.
1988 TL/04 Bugzilla 1281 - Spec typo.
1989 Bugzilla 1283 - Spec typo.
1990 Bugzilla 1290 - Spec grammar fixes.
1992 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1994 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1996 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1997 mailing list by by Dmitry Isaikin.
1999 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2001 JH/02 Support "G" suffix to numbers in ${if comparisons.
2003 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2005 NM/01 Bugzilla 1197 - Spec typo
2006 Bugzilla 1196 - Spec examples corrections
2008 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2010 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2011 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2014 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2015 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2017 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2018 "acl {{name}{arg}...}", and optional args on acl condition
2021 JH/05 Permit multiple router/transport headers_add/remove lines.
2023 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2025 JH/07 Avoid using a waiting database for a single-message-only transport.
2026 Performance patch from Paul Fisher. Bugzilla 1262.
2028 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2031 JH/09 Add $headers_added variable, with content from use of ACL modifier
2032 add_header (but not yet added to the message). Bugzilla 199.
2034 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2035 Pulled from Bugzilla 817 by Wolfgang Breyha.
2037 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2039 (nb: this is the same fix as in Exim 4.80.1)
2041 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2044 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2047 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2049 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2050 advertise SMTP AUTH mechanism to us, instead of a generic
2051 protocol violation error. Also, make Exim more robust to bad
2052 data from the Dovecot auth socket.
2054 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2056 When a queue runner is handling a message, Exim first routes the
2057 recipient addresses, during which it prunes them based on the retry
2058 hints database. After that it attempts to deliver the message to
2059 any remaining recipients. It then updates the hints database using
2062 So if a recipient address works intermittently, it can get repeatedly
2063 deferred at routing time. The retry hints record remains fresh so the
2064 address never reaches the final cutoff time.
2066 This is a fairly common occurrence when a user is bumping up against
2067 their storage quota. Exim had some logic in its local delivery code
2068 to deal with this. However it did not apply to per-recipient defers
2069 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2071 This change adds a proper retry rule check during routing so that the
2072 final cutoff time is checked against the message's age. We only do
2073 this check if there is an address retry record and there is not a
2074 domain retry record; this implies that previous attempts to handle
2075 the address had the retry_use_local_parts option turned on. We use
2076 this as an approximation for the destination being like a local
2077 delivery, as in LMTP.
2079 I suspect this new check makes the old local delivery cutoff check
2080 redundant, but I have not verified this so I left the code in place.
2082 TF/02 Correct gecos expansion when From: is a prefix of the username.
2084 Test 0254 submits a message to Exim with the header
2088 When I ran the test suite under the user fanf2, Exim expanded
2089 the header to contain my full name, whereas it should have added
2090 a Resent-Sender: header. It erroneously treats any prefix of the
2091 username as equal to the username.
2093 This change corrects that bug.
2095 GF/01 DCC debug and logging tidyup
2096 Error conditions log to paniclog rather than rejectlog.
2097 Debug lines prefixed by "DCC: " to remove any ambiguity.
2099 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2101 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2102 Bug spotted by Jeremy Harris; was flawed since initial commit.
2103 Would have resulted in OCSP responses post-SNI triggering an Exim
2104 NULL dereference and crash.
2106 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2108 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2109 Bug detection, analysis and fix by Samuel Thibault.
2110 Bugzilla 1331, Debian bug #698092.
2112 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2114 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2115 Server implementation by Todd Lyons, client by JH.
2116 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2117 config variable "prdr_enable" controls whether the server
2118 advertises the facility. If the client requests PRDR a new
2119 acl_data_smtp_prdr ACL is called once for each recipient, after
2120 the body content is received and before the acl_smtp_data ACL.
2121 The client is controlled by both of: a hosts_try_prdr option
2122 on the smtp transport, and the server advertisement.
2123 Default client logging of deliveries and rejections involving
2124 PRDR are flagged with the string "PRDR".
2126 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2127 fclose(). Diagnosis by Todd Lyons.
2129 PP/17 Update configure.default to handle IPv6 localhost better.
2130 Patch by Alain Williams (plus minor tweaks).
2133 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2134 This is now consistent with GnuTLS, and is now documented: the
2135 previous undocumented portable approach to treating the option as
2136 unset was to force an expansion failure. That still works, and
2137 an empty string is now equivalent.
2139 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2140 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2141 not performing validation itself.
2143 PP/20 Added force_command boolean option to pipe transport.
2144 Patch from Nick Koston, of cPanel Inc.
2146 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2149 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2151 PP/21 Fix eximon continuous updating with timestamped log-files.
2152 Broken in a format-string cleanup in 4.80, missed when I repaired the
2153 other false fix of the same issue.
2154 Report and fix from Heiko Schlichting.
2157 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2158 Report from Prashanth Katuri.
2160 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2161 It's SecureTransport, so affects any MacOS clients which use the
2162 system-integrated TLS libraries, including email clients.
2164 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2165 using a MIME ACL for non-SMTP local injection.
2166 Report and assistance in diagnosis by Warren Baker.
2168 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2170 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2172 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2173 last id that failed so it may be referenced in subsequent ACL's.
2175 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2178 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2179 ldap library initialization, allowing self-signed CA's to be
2180 used. Also properly sets require_cert option later in code by
2181 using NULL (global ldap config) instead of ldap handle (per
2182 session). Bug diagnosis and testing by alxgomz.
2184 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2185 the src/util/ subdirectory.
2187 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2188 renamed to Transport Post Delivery Action by Jeremy Harris, as
2191 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2192 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2193 redis_servers = needs to be configured which will be used by the redis
2194 lookup. Patch from Warren Baker, of The Packet Hub.
2196 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2198 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2199 hostname or reverse DNS when processing a host list. Used suggestions
2200 from multiple comments on this bug.
2202 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2204 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2205 Missed a few lines, added it to make the runtest require no keyboard
2208 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2209 contains upper case chars. Make router use caseful_local_part.
2211 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2212 support when GnuTLS has been built with p11-kit.
2218 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2220 This, or similar/improved, will also be change PP/11 of 4.82.
2226 PP/01 Handle short writes when writing local log-files.
2227 In practice, only affects FreeBSD (8 onwards).
2228 Bugzilla 1053, with thanks to Dmitry Isaikin.
2230 NM/01 Bugzilla 949 - Documentation tweak
2232 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2235 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2237 PP/02 Implemented gsasl authenticator.
2239 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2241 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2242 `pkg-config foo` for cflags/libs.
2244 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2245 with rest of GSASL and with heimdal_gssapi.
2247 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2248 `pkg-config foo` for cflags/libs for the TLS implementation.
2250 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2251 properties get this fed in as external SSF. A number of robustness
2252 and debugging improvements to the cyrus_sasl authenticator.
2254 PP/08 cyrus_sasl server now expands the server_realm option.
2256 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2257 Patch by Jeremy Harris.
2259 PP/10 Added dbmjz lookup type.
2261 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2263 PP/12 MAIL args handles TAB as well as SP, for better interop with
2264 non-compliant senders.
2265 Analysis and variant patch by Todd Lyons.
2267 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2268 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2269 Patch from Dirk Mueller <dmueller@suse.com>
2271 PP/13 tls_peerdn now print-escaped for spool files.
2272 Observed some $tls_peerdn in wild which contained \n, which resulted
2273 in spool file corruption.
2275 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2276 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2277 or write after TLS renegotiation, which otherwise led to messages
2280 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2281 as a tracking header (ie: a signed header comes before the signature).
2282 Patch from Wolfgang Breyha.
2284 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2285 comma-sep list; embedded commas doubled.
2287 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2289 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2291 Report and patch from Dmitry Banschikov.
2293 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2294 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2295 failures. We appear to now support TLS1.1+ with Exim.
2297 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2298 lets Exim select keys and certificates based upon TLS SNI from client.
2299 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2300 before an outbound SMTP session. New log_selector, +tls_sni.
2302 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2303 NULL dereference. Report and patch from Alun Jones.
2305 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2306 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2307 Not seeing resolver debug output on NetBSD, but suspect this is a
2308 resolver implementation change.
2310 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2311 Left warnings. Added "eximon gdb" invocation mode.
2313 PP/21 Defaulting "accept_8bitmime" to true, not false.
2315 PP/22 Added -bw for inetd wait mode support.
2317 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2318 locate the relevant includes and libraries. Made this the default.
2320 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2321 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2323 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2324 This may cause build issues on older platforms.
2326 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2327 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2328 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2329 Added SNI support via GnuTLS too.
2330 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2332 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2334 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2335 Applied second patch from Janne, implementing suggestion to default
2336 multiple-strings-in-record handling to match SPF spec.
2338 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2340 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2341 read-only, out of scope).
2342 Patch from Wolfgang Breyha, report from Stuart Northfield.
2344 PP/29 Fix three issues highlighted by clang analyser static analysis.
2345 Only crash-plausible issue would require the Cambridge-specific
2346 iplookup router and a misconfiguration.
2347 Report from Marcin Mirosław.
2349 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2351 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2352 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2353 As part of this, removing so much warning spew let me fix some minor
2354 real issues in debug logging.
2356 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2357 assignment on my part. Fixed.
2359 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2360 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2361 Janne Snabb (who went above and beyond: thank you).
2363 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2364 string otherwise requires a connection and a bunch more work and it's
2365 relatively easy to get wrong. Should also expose TLS library linkage
2368 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2369 64-bit ${eval} (JH/03).
2371 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2372 GNU libc to support some of the 64-bit stuff, should not lead to
2373 conflicts. Defined before os.h is pulled in, so if a given platform
2374 needs to override this, it can.
2376 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2377 protection layer was required, which is not implemented.
2378 Bugzilla 1254, patch from Wolfgang Breyha.
2380 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2381 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2382 tls_dhparam take prime identifiers. Also unbreak combination of
2383 OpenSSL+DH_params+TLSSNI.
2385 PP/39 Disable SSLv2 by default in OpenSSL support.
2391 PP/01 Solaris build fix for Oracle's LDAP libraries.
2392 Bugzilla 1109, patch from Stephen Usher.
2394 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2396 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2399 TF/02 Fix a couple more cases where we did not log the error message
2400 when unlink() failed. See also change 4.74-TF/03.
2402 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2403 lock up or crash if it happened to be inside a call to libc when it
2404 got a SIGUSR1 from exiwhat.
2406 The SIGUSR1 handler appends the current process status to the process
2407 log which is later printed by exiwhat. It used to use the general
2408 purpose logging code to do this, but several functions it calls are
2409 not safe for signals.
2411 The new output code in the SIGUSR1 handler is specific to the process
2412 log, and simple enough that it's easy to inspect for signal safety.
2413 Removing some special cases also simplifies the general logging code.
2414 Removing the spurious timestamps from the process log simplifies
2417 TF/04 Improved ratelimit ACL condition.
2419 The /noupdate option has been deprecated in favour of /readonly which
2420 has clearer semantics. The /leaky, /strict, and /readonly update modes
2421 are mutually exclusive. The update mode is no longer included in the
2422 database key; it just determines when the database is updated. (This
2423 means that when you upgrade Exim will forget old rate measurements.)
2425 Exim now checks that the per_* options are used with an update mode that
2426 makes sense for the current ACL. For example, when Exim is processing a
2427 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2428 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2429 must specify per_mail/readonly. If you omit the update mode it defaults to
2430 /leaky where that makes sense (as before) or /readonly where required.
2432 The /noupdate option is now undocumented but still supported for
2433 backwards compatibility. It is equivalent to /readonly except that in
2434 ACLs where /readonly is required you may specify /leaky/noupdate or
2435 /strict/noupdate which are treated the same as /readonly.
2437 A useful new feature is the /count= option. This is a generalization
2438 of the per_byte option, so that you can measure the throughput of other
2439 aggregate values. For example, the per_byte option is now equivalent
2440 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2442 The per_rcpt option has been generalized using the /count= mechanism
2443 (though it's more complicated than the per_byte equivalence). When it is
2444 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2445 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2446 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2447 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2448 Note that using per_rcpt with a non-readonly update mode in more than
2449 one ACL will cause the recipients to be double-counted. (The per_mail
2450 and per_byte options don't have this problem.)
2452 The handling of very low rates has changed slightly. If the computed rate
2453 is less than the event's count (usually one) then this event is the first
2454 after a long gap. In this case the rate is set to the same as this event's
2455 count, so that the first message of a spam run is counted properly.
2457 The major new feature is a mechanism for counting the rate of unique
2458 events. The new per_addr option counts the number of different
2459 recipients that someone has sent messages to in the last time period. It
2460 behaves like per_rcpt if all the recipient addresses are different, but
2461 duplicate recipient addresses do not increase the measured rate. Like
2462 the /count= option this is a general mechanism, so the per_addr option
2463 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2464 example, measure the rate that a client uses different sender addresses
2465 with the options per_mail/unique=$sender_address. There are further
2466 details in the main documentation.
2468 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2470 TF/06 Removed a few PCRE remnants.
2472 TF/07 Automatically extract Exim's version number from tags in the git
2473 repository when doing development or release builds.
2475 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2476 Bugzilla 879. Patch from Paul Fisher.
2478 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2479 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2482 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2484 PP/05 Variable $av_failed, true if the AV scanner deferred.
2485 Bugzilla 1078. Patch from John Horne.
2487 PP/06 Stop make process more reliably on build failure.
2488 Bugzilla 1087. Patch from Heiko Schlittermann.
2490 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2491 Bugzilla 1089. Patch from Heiko Schlittermann.
2493 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2494 Bugzilla 1131. Patch from Holger Weiß.
2496 PP/09 Handle IPv6 addresses with SPF.
2497 Bugzilla 860. Patch from Wolfgang Breyha.
2499 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2501 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2504 PP/11 match_* no longer expand right-hand-side by default.
2505 New compile-time build option, EXPAND_LISTMATCH_RHS.
2506 New expansion conditions, "inlist", "inlisti".
2508 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2510 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2512 PP/14 fix log_write() format string regression from TF/03.
2513 Bugzilla 1152. Patch from Dmitry Isaikin.
2519 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2521 PP/02 Harmonised TLS library version reporting; only show if debugging.
2522 Layout now matches that introduced for other libraries in 4.74 PP/03.
2524 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2526 PP/04 New "dns_use_edns0" global option.
2528 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2531 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2532 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2534 TK/01 Updated PolarSSL code to 0.14.2.
2535 Bugzilla 1097. Patch from Andreas Metzler.
2537 PP/07 Catch divide-by-zero in ${eval:...}.
2538 Fixes bugzilla 1102.
2540 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2543 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2544 format-string attack -- SECURITY: remote arbitrary code execution.
2546 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2547 time unintentionally subject to list matching rules, letting the header
2548 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2549 arbitrary string expansion). This allowed for information disclosure.
2551 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2552 INT_MIN/-1 -- value coerced to INT_MAX.
2558 NM/01 Workaround for PCRE version dependency in version reporting
2561 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2562 This fixes portability to compilers other than gcc, notably
2563 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2565 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2566 makefiles for portability to HP-UX and POSIX correctness.
2568 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2569 Also via indented variable definition in the Makefile.
2570 (Debugging by Oliver Heesakkers).
2572 PP/02 Restore caching of spamd results with expanded spamd_address.
2573 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2575 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2576 Improves build reliability. Fix from: Frank Elsner
2578 NM/02 Fix wide character breakage in the rfc2047 coding
2579 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2581 NM/03 Allow underscore in dnslist lookups
2582 Fixes bug 1026. Patch from Graeme Fowler
2584 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2585 Code patches from Adam Ciarcinski of NetBSD.
2587 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2590 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2591 is logged, to avoid truncation. Patch from John Horne.
2593 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2594 Patch from Jakob Hirsch.
2596 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2597 SQL string expansion failure details.
2598 Patch from Andrey Oktyabrski.
2600 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2601 Patch from Simon Arlott.
2603 PP/09 New lookups functionality failed to compile on old gcc which rejects
2604 extern declarations in function scope.
2605 Patch from Oliver Fleischmann
2607 PP/10 Use sig_atomic_t for flags set from signal handlers.
2608 Check getgroups() return and improve debugging.
2609 Fixed developed for diagnosis in bug 927 (which turned out to be
2612 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2613 Patch from Mark Zealey.
2615 PP/12 Bugzilla 1056: Improved spamd server selection.
2616 Patch from Mark Zealey.
2618 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2619 Based on patch from Heiko Schlittermann.
2621 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2622 Patch from Uwe Doering, sign-off by Michael Haardt.
2624 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2625 variable declaration deep within a block. Bug and patch from
2628 PP/15 lookups-Makefile IRIX compatibility coercion.
2630 PP/16 Make DISABLE_DKIM build knob functional.
2632 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2633 Patch by Simon Arlott
2635 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2636 variable argument macros. Our copy now differs from upstream.
2642 TF/01 Failure to get a lock on a hints database can have serious
2643 consequences so log it to the panic log.
2645 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2646 controlled using the smtp_confirmation log selector.
2648 TF/03 Include the error message when we fail to unlink a spool file.
2650 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2651 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2652 for maintaining out-of-tree patches for some time.
2654 PP/01 Bugzilla 139: Documentation and portability issues.
2655 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2656 Handle per-OS dynamic-module compilation flags.
2658 PP/02 Let /dev/null have normal permissions.
2659 The 4.73 fixes were a little too stringent and complained about the
2660 permissions on /dev/null. Exempt it from some checks.
2661 Reported by Andreas M. Kirchwitz.
2663 PP/03 Report version information for many libraries, including
2664 Exim version information for dynamically loaded libraries. Created
2665 version.h, now support a version extension string for distributors
2666 who patch heavily. Dynamic module ABI change.
2668 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2669 privilege escalation vulnerability whereby the Exim run-time user
2670 can cause root to append content of the attacker's choosing to
2673 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2676 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2677 If dropping privileges for untrusted macros, we disabled normal logging
2678 on the basis that it would fail; for the Exim run-time user, this is not
2679 the case, and it resulted in successful deliveries going unlogged.
2680 Fixed. Reported by Andreas Metzler.
2686 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2687 only prepend for the Resent-* case. Fixes regression introduced in
2688 Exim 4.70 by NM/22 for Bugzilla 607.
2690 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2691 increasing numbers of administrators be bitten by this.
2693 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2695 PP/03 Bugzilla 994: added openssl_options main configuration option.
2697 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2699 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2701 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2703 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2704 without a peer certificate, leading to a segfault because of an
2705 assumption that peers always have certificates. Be a little more
2706 paranoid. Problem reported by Martin Tscholak.
2708 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2709 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2710 NB: ClamAV planning to remove STREAM in "middle of 2010".
2711 CL also introduces -bmalware, various -d+acl logging additions and
2712 more caution in buffer sizes.
2714 PP/09 Implemented reverse_ip expansion operator.
2716 PP/10 Bugzilla 937: provide a "debug" ACL control.
2718 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2720 PP/12 Bugzilla 973: Implement --version.
2722 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2724 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2726 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2728 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2729 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2730 ignore trailing whitespace.
2732 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2734 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2737 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2738 Notification from Dr Andrew Aitchison.
2740 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2741 ExtendedDetectionInfo response format.
2742 Notification from John Horne.
2744 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2747 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2748 XSL and documented dependency on system catalogs, with examples of how
2751 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2754 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2755 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2756 configuration file which is writeable by the Exim user or group.
2758 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2759 of configuration files to cover files specified with the -C option if
2760 they are going to be used with root privileges, not just the default
2763 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2764 option (effectively making it always true).
2766 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2767 files to be used while preserving root privileges.
2769 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2770 that rogue child processes cannot use them.
2772 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2773 run-time user, instead of root.
2775 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2776 Exim run-time user without dropping privileges.
2778 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2779 result string, instead of calling string_vformat() twice with the same
2782 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2783 for other users. Others should always drop root privileges if they use
2784 -C on the command line, even for a whitelisted configure file.
2786 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2788 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2794 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2795 $data_path, and $header_path variables; fixed documentation bugs and
2798 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2799 exipick to access non-standard spools, including the "frozen" queue
2802 NM/01 Bugzilla 965: Support mysql stored procedures.
2803 Patch from Alain Williams
2805 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2807 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2808 Patch from Andreas Metzler
2810 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2811 Patch from Kirill Miazine
2813 NM/05 Bugzilla 671: Added umask to procmail example.
2815 JJ/03 installed exipick 20100323.0, fixing doc bug
2817 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2818 directory. Notification and patch from Dan Rosenberg.
2820 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2822 TK/02 Improve log output when DKIM signing operation fails.
2824 MH/01 Treat the transport option dkim_domain as a colon separated
2825 list, not as a single string, and sign the message with each element,
2826 omitting multiple occurences of the same signer.
2828 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2829 Bugzilla 985, 986. Patch by Simon Arlott
2831 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2832 Patch by Simon Arlott
2834 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2835 MBX locking. Notification from Dan Rosenberg.
2841 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2843 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2845 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2847 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2849 NM/04 Bugzilla 915: Flag broken perl installation during build.
2855 TK/01 Added patch by Johannes Berg that expands the main option
2856 "spamd_address" if it starts with a dollar sign.
2858 TK/02 Write list of recipients to X-Envelope-Sender header when building
2859 the mbox-format spool file for content scanning (suggested by Jakob
2862 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2863 (http://www.dcc-servers.net/) support via dccifd. Activated by
2864 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2866 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2867 by Mark Daniel Reidel <mr@df.eu>.
2869 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2870 When building exim an external PCRE library is now needed -
2871 PCRE is a system library on the majority of modern systems.
2872 See entry on PCRE_LIBS in EDITME file.
2874 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2875 conversation. Added nologin parameter to request.
2876 Patch contributed by Kirill Miazine.
2878 TF/01 Do not log submission mode rewrites if they do not change the address.
2880 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2882 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2883 log files in place. Contributed by Roberto Lima.
2885 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2887 TF/03 Bugzilla 615: When checking the local_parts router precondition
2888 after a local_part_suffix or local_part_prefix option, Exim now
2889 does not use the address's named list lookup cache, since this
2890 contains cached lookups for the whole local part.
2892 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2893 Robert Millan. Documentation is in experimental-spec.txt.
2895 TF/04 Bugzilla 668: Fix parallel build (make -j).
2897 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2899 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2900 Patch provided by Jan Srzednicki.
2902 TF/05 Leading white space used to be stripped from $spam_report which
2903 wrecked the formatting. Now it is preserved.
2905 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2906 that they are available at delivery time.
2908 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2910 TF/08 TLS error reporting now respects the incoming_interface and
2911 incoming_port log selectors.
2913 TF/09 Produce a more useful error message if an SMTP transport's hosts
2914 setting expands to an empty string.
2916 NM/06 Bugzilla 744: EXPN did not work under TLS.
2917 Patch provided by Phil Pennock.
2919 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2920 Patch provided by Richard Godbee.
2922 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2923 acl_smtp_notquit, added index entry.
2925 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2926 Patch provided by Eugene Bujak.
2928 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2929 accept(). Patch provided by Maxim Dounin.
2931 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2932 Patch provided by Phil Pennock.
2934 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2936 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2937 Patch provided by Brad "anomie" Jorsch.
2939 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2940 Patch provided by Dean Brooks.
2942 TK/05 Add native DKIM support (does not depend on external libraries).
2944 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2945 Patch provided by Graeme Fowler.
2947 NM/16 Bugzilla 851: Documentation example syntax fix.
2949 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2951 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2954 NM/19 Bugzilla 745: TLS version reporting.
2955 Patch provided by Phil Pennock.
2957 NM/20 Bugzilla 167: bool: condition support.
2958 Patch provided by Phil Pennock.
2960 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2961 clients. Patch provided by Phil Pennock.
2963 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2964 Patch provided by Brad "anomie" Jorsch.
2966 NM/23 Bugzilla 687: Fix misparses in eximstats.
2967 Patch provided by Heiko Schlittermann.
2969 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2970 Patch provided by Heiko Schlittermann.
2972 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2973 plus update to original patch.
2975 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2977 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2978 Patch provided by David Brownlee.
2980 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2982 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2984 NM/30 Bugzilla 888: TLS documentation bugfixes.
2986 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2988 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2989 Unlike the original bugzilla I have changed all shell scripts in src tree.
2991 NM/33 Bugzilla 898: Transport filter timeout fix.
2992 Patch by Todd Rinaldo.
2994 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2995 Patch by Serge Demonchaux.
2997 NM/35 Bugzilla 39: Base64 decode bug fixes.
2998 Patch by Jakob Hirsch.
3000 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3002 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3004 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3006 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3012 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3013 ALT-N's libdkim that I have put here:
3014 http://duncanthrax.net/exim-experimental/
3016 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3017 were called 'true' and it seems that C99 defines that as a reserved
3018 keyword to be used with 'bool' variable types. That means you could
3019 not include C99-style headers which use bools without triggering
3020 build errors in sieve.c.
3022 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3023 as mailq or other aliases. Changed the --help handling significantly
3024 to do whats expected. exim_usage() emits usage/help information.
3026 SC/01 Added the -bylocaldomain option to eximstats.
3028 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3030 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3032 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3038 PH/01 Another patch from the Sieve maintainer.
3040 PH/02 When an IPv6 address is converted to a string for single-key lookup
3041 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3042 dots are used instead of colons so that keys in lsearch files need not
3043 contain colons. This was done some time before quoting was made available
3044 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3045 (notated using the quote facility) so as to distinguish them from IPv4
3046 keys. This meant that lookups for IP addresses in host lists did not work
3047 for iplsearch lookups.
3049 This has been fixed by arranging for IPv6 addresses to be expressed with
3050 colons if the lookup type is iplsearch. This is not incompatible, because
3051 previously such lookups could never work.
3053 The situation is now rather anomalous, since one *can* have colons in
3054 ordinary lsearch keys. However, making the change in all cases is
3055 incompatible and would probably break a number of configurations.
3057 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3060 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3061 conversion specification without a maximum field width, thereby enabling
3062 a rogue spamd server to cause a buffer overflow. While nobody in their
3063 right mind would setup Exim to query an untrusted spamd server, an
3064 attacker that gains access to a server running spamd could potentially
3065 exploit this vulnerability to run arbitrary code as the Exim user.
3067 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3068 $primary_hostname instead of what libspf2 thinks the hosts name is.
3070 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3071 a directory entry by the name of the lookup key. Previously, if a
3072 symlink pointed to a non-existing file or a file in a directory that
3073 Exim lacked permissions to read, a lookup for a key matching that
3074 symlink would fail. Now it is enough that a matching directory entry
3075 exists, symlink or not. (Bugzilla 503.)
3077 PH/03 The body_linecount and body_zerocount variables are now exported in the
3080 PH/04 Added the $dnslist_matched variable.
3082 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3083 This means they are set thereafter only if the connection becomes
3086 PH/06 Added the client_condition to authenticators so that some can be skipped
3087 by clients under certain conditions.
3089 PH/07 The error message for a badly-placed control=no_multiline_responses left
3090 "_responses" off the end of the name.
3092 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3094 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3095 (without spaces) instead of just copying the configuration text.
3097 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3099 PH/11 Added $max_received_linelength.
3101 PH/12 Added +ignore_defer and +include_defer to host lists.
3103 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3104 way in which PCRE > 7.0 is built.
3106 PH/14 Implemented queue_only_load_latch.
3108 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3109 MAIL command. The effect was to mangle the value on 64-bit systems.
3111 PH/16 Another patch from the Sieve maintainer.
3113 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3115 PH/18 If a system quota error occurred while trying to create the file for
3116 a maildir delivery, the message "Mailbox is full" was not appended to the
3117 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3118 only to a quota excession during the actual writing of the file.
3120 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3121 characters?) which causes problems in log lines. The DN values are now
3122 passed through string_printing() before being added to log lines.
3124 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3125 and InterBase are left for another time.)
3127 PH/21 Added message_body_newlines option.
3129 PH/22 Guard against possible overflow in moan_check_errorcopy().
3131 PH/23 POSIX allows open() to be a macro; guard against that.
3133 PH/24 If the recipient of an error message contained an @ in the local part
3134 (suitably quoted, of course), incorrect values were put in $domain and
3135 $local_part during the evaluation of errors_copy.
3141 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3142 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3145 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3146 issue a MAIL command.
3148 PH/02 In an ACL statement such as
3150 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3152 if a client was not listed at all, or was listed with a value other than
3153 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3154 the condition was not true (as it should be), so access was not denied.
3155 The bug was that the ! inversion was incorrectly passed on to the second
3156 item. This has been fixed.
3158 PH/03 Added additional dnslists conditions == and =& which are different from
3159 = and & when the dns lookup returns more than one IP address.
3161 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3162 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3164 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3165 FSYNC, which compiles an option called disable_fsync that allows for
3166 bypassing fsync(). The documentation is heavily laced with warnings.
3168 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3170 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3171 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3172 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3173 including adding "make clean"; (3) Added -fPIC when compiling the test
3174 dynamically loaded module, to get rid of a warning.
3176 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3177 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3178 = 0s. The bug is otherwise harmless.
3180 PH/07 There was a bug in the dovecot authenticator such that the value of
3181 $auth1 could be overwritten, and so not correctly preserved, after a
3182 successful authentication. This usually meant that the value preserved by
3183 the server_setid option was incorrect.
3185 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3187 PH/09 Installed PCRE release 7.0.
3189 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3190 run for batched SMTP input. It is now run at the start of every message
3191 in the batch. While fixing this I discovered that the process information
3192 (output by running exiwhat) was not always getting set for -bs and -bS
3193 input. This is fixed, and it now also says "batched" for BSMTP.
3195 PH/11 Added control=no_pipelining.
3197 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3198 patch, slightly modified), and move the expansion of helo_data till after
3199 the connection is made in the smtp transport (so it can use these
3202 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3204 PH/14 Added log_selector = +pid.
3206 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3208 PH/16 Add ${if forany and ${if forall.
3210 PH/17 Added dsn_from option to vary the From: line in DSNs.
3212 PH/18 Flush SMTP output before performing a callout, unless control =
3213 no_callout_flush is set.
3215 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3216 was true (the default) a successful delivery failed to delete the retry
3217 item, thus causing premature timeout of the address. The bug is now
3220 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3222 PH/21 Long custom messages for fakedefer and fakereject are now split up
3223 into multiline responses in the same way that messages for "deny" and
3224 other ACL rejections are.
3226 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3227 with slight modification.
3229 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3230 draft, changing the syntax and factoring some duplicate code".
3232 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3233 for deliveries of the second and subsequent messages over the same SMTP
3236 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3237 ${reduce, with only minor "tidies".
3239 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3241 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3242 expansion side effects.
3244 PH/27 When a message times out after an over-quota error from an Exim-imposed
3245 quota, the bounce message says "mailbox is full". This message was not
3246 being given when it was a system quota that was exceeded. It now should
3249 MH/03 Made $recipients available in local_scan(). local_scan() already has
3250 better access to the recipient list through recipients_list[], but
3251 $recipients can be useful in postmaster-provided expansion strings.
3253 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3254 in the case of a MAIL command with additional options following the
3255 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3256 were accidentally chopped off.
3258 PH/29 SMTP synchronization checks are implemented when a command is read -
3259 there is a check that no more input is waiting when there shouldn't be
3260 any. However, for some commands, a delay in an ACL can mean that it is
3261 some time before the response is written. In this time, more input might
3262 arrive, invalidly. So now there are extra checks after an ACL has run for
3263 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3264 pipelining has not been advertised.
3266 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3268 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3269 returned in the SMTP response when smtp_return_error_details was false.
3270 This has been fixed.
3272 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3273 instead of the C I/O that was originally supplied, because problems were
3274 reported on Solaris.
3276 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3277 Exim which did not show up earlier: it was assuming that a call to
3278 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3279 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3280 was a macro that became an assignment, so it seemed to work. This has
3281 changed to a proper function call with a void return, hence the compile
3282 error. Exim's code has been fixed.
3284 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3287 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3289 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3291 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3292 because it turns out to be too big or there is a timeout) there is no
3293 "Completed" line in the log. When some messages of this type were
3294 selected by exigrep, they were listed as "not completed". Others were
3295 picked up by some special patterns. I have improved the selection
3296 criteria to be more general.
3298 PH/38 The host_find_failed option in the manualroute router can now be set
3299 to "ignore", to completely ignore a host whose IP address cannot be
3300 found. If all hosts are ignored, the behaviour is controlled by the new
3301 host_all_ignored option.
3303 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3304 homing or because of multiple MX records with /mx) generated more than
3305 one IP address, and the following item turned out to be the local host,
3306 all the secondary addresses of the first item were incorrectly removed
3307 from the list, along with the local host and any following hosts (which
3308 is what is supposed to happen).
3310 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3311 whoever called Exim into the -H file. In the case of the daemon it was
3312 behaving confusingly. When first started, it used values for whoever
3313 started the daemon, but after a SIGHUP it used the Exim user (because it
3314 calls itself on a restart). I have changed the code so that it now always
3317 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3318 message are rejected with the same error (e.g. no authentication or bad
3319 sender address), and a DATA command is nevertheless sent (as can happen
3320 with PIPELINING or a stupid MUA), the error message that was given to the
3321 RCPT commands is included in the rejection of the DATA command. This is
3322 intended to be helpful for MUAs that show only the final error to their
3325 PH/42 Another patch from the Sieve maintainer.
3327 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3328 Eximstats - Fixed some broken HTML links and added missing column headers
3330 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3331 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3333 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3335 PH/43 Yet another patch from the Sieve maintainer.
3337 PH/44 I found a way to check for a TCP/IP connection going away before sending
3338 the response to the final '.' that terminates a message, but only in the
3339 case where the client has not sent further data following the '.'
3340 (unfortunately, this is allowed). However, in many cases there won't be
3341 any further data because there won't be any more messages to send. A call
3342 to select() can be used: if it shows that the input is "ready", there is
3343 either input waiting, or the socket has been closed. An attempt to read
3344 the next input character can distinguish the two cases. Previously, Exim
3345 would have sent an OK response which the client would never have see.
3346 This could lead to message repetition. This fix should cure that, at
3347 least in a lot of common cases.
3349 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3350 advertised in response to EHLO.
3356 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3357 fixed by 4.65/MH/01 (is this a record?) are fixed:
3359 (i) An empty string was always treated as zero by the numeric comparison
3360 operators. This behaviour has been restored.
3362 (ii) It is documented that the numeric comparison operators always treat
3363 their arguments as decimal numbers. This was broken in that numbers
3364 starting with 0 were being interpreted as octal.
3366 While fixing these problems I realized that there was another issue that
3367 hadn't been noticed. Values of message_size_limit (both the global option
3368 and the transport option) were treated as octal if they started with 0.
3369 The documentation was vague. These values are now always treated as
3370 decimal, and I will make that clear in the documentation.
3376 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3377 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3380 MH/01 Don't check that the operands of numeric comparison operators are
3381 integers when their expansion is in "skipping" mode (fixes bug
3382 introduced by 4.64-PH/07).
3384 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3385 child addresses, Exim now panics and dies. Previously, because the count
3386 is held in a short int, deliveries were likely to be lost. As such a
3387 large number of recipients for a single message is ridiculous
3388 (performance will be very, very poor), I have chosen to impose a limit
3389 rather than extend the field.
3395 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3396 leftover -K file (the existence of which was triggered by #402).
3397 While we were at it, introduced process PID as part of the -K
3398 filename. This should rule out race conditions when creating
3401 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3402 processing considerably. Previous code took too long for large mails,
3403 triggering a timeout which in turn triggers #401.
3405 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3406 in the DK code in transports.c. sendfile() is not really portable,
3407 hence the _LINUX specificness.
3409 TF/01 In the add_headers option to the mail command in an Exim filter,
3410 there was a bug that Exim would claim a syntax error in any
3411 header after the first one which had an odd number of characters
3414 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3415 callout verification, Exim cached a "reject" for the entire domain. This
3416 is correct for most verifications, but it is not correct for a recipient
3417 verification with use_sender or use_postmaster set, because in that case
3418 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3419 case of MAIL FROM:<> rejection from other early rejections (e.g.
3420 rejection of HELO). When verifying a recipient using a non-null MAIL
3421 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3422 Whatever the result of the callout, the value of the domain cache is
3423 left unchanged (for any other kind of callout, getting as far as trying
3424 RCPT means that the domain itself is ok).
3426 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3429 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3430 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3431 session, the daemon ignores ECONNECT errors and logs others; it now
3432 ignores EPIPE as well.
3434 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3435 (quoted-printable decoding).
3437 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3438 later the small subsequent patch to fix an introduced bug.
3440 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3442 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3444 PH/08 An error is now given if message_size_limit is specified negative.
3446 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3447 to be given (somewhat) arbitrary names.
3449 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3452 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3453 miscellaneous code fixes
3455 PH/10 Added the log_reject_target ACL modifier to specify where to log
3458 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3459 hostname. This is wrong, because it relates to the incoming message (and
3460 probably the interface on which it is arriving) and not to the outgoing
3461 callout (which could be using a different interface). This has been
3462 changed to use the value of the helo_data option from the smtp transport
3463 instead - this is what is used when a message is actually being sent. If
3464 there is no remote transport (possible with a router that sets up host
3465 addresses), $smtp_active_hostname is used.
3467 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3468 tweaks were necessary in order to get it to work (see also 21 below):
3469 (a) The code assumed that strncpy() returns a negative number on buffer
3470 overflow, which isn't the case. Replaced with Exim's string_format()
3472 (b) There were several signed/unsigned issues. I just did the minimum
3473 hacking in of casts. There is scope for a larger refactoring.
3474 (c) The code used strcasecmp() which is not a standard C function.
3475 Replaced with Exim's strcmpic() function.
3476 (d) The code set only $1; it now sets $auth1 as well.
3477 (e) A simple test gave the error "authentication client didn't specify
3478 service in request". It would seem that Dovecot has changed its
3479 interface. Fortunately there's a specification; I followed it and
3480 changed what the client sends and it appears to be working now.
3482 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3485 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3486 address A is aliased to B and C, where B exists and C does not. Without
3487 -v the output is "A verified" because verification stops after a
3488 successful redirection if more than one address is generated. However,
3489 with -v the child addresses are also verified. Exim was outputting "A
3490 failed to verify" and then showing the successful verification for C,
3491 with its parentage. It now outputs "B failed to verify", showing B's
3492 parentage before showing the successful verification of C.
3494 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3495 look up a TXT record in a specific list after matching in a combined
3498 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3499 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3500 they consult the DNS. I had assumed they would set it the way they
3501 wanted; and indeed my experiments on Linux seem to show that in some
3502 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3503 To be on the safe side, however, I have now made the interface to
3504 host_find_byname() similar to host_find_bydns(), with an argument
3505 containing the DNS resolver options. The host_find_byname() function now
3506 sets these options at its start, just as host_find_bydns() does. The smtp
3507 transport options dns_qualify_single and dns_search_parents are passed to
3508 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3509 of host_find_byname() use the default settings of RES_DEFNAMES
3510 (qualify_single) but not RES_DNSRCH (search_parents).
3512 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3513 spool_read_header() do less string testing, by means of a preliminary
3514 switch on the second character of optional "-foo" lines. (This is
3515 overdue, caused by the large number of possibilities that now exist.
3516 Originally there were few.) While I was there, I also converted the
3517 str(n)cmp tests so they don't re-test the leading "-" and the first
3518 character, in the hope this might squeeze out yet more improvement.
3520 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3521 flag allowing group syntax was set by the header_syntax check but not
3522 turned off, possible causing trouble later; (2) The flag was not being
3523 set at all for the header_verify test, causing "group"-style headers to
3524 be rejected. I have now set it in this case, and also caused header_
3525 verify to ignore an empty address taken from a group. While doing this, I
3526 came across some other cases where the code for allowing group syntax
3527 while scanning a header line wasn't quite right (mostly, not resetting
3528 the flag correctly in the right place). These bugs could have caused
3529 trouble for malformed header lines. I hope it is now all correct.
3531 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3532 with the "reply" argument non-NULL. The code, however (which originally
3533 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3534 but it didn't always do it. This confused somebody who was copying the
3535 code for some other use. I have removed all the tests.
3537 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3538 feature that was used to support insecure browsers during the U.S. crypto
3539 embargo. It requires special client support, and Exim is probably the
3540 only MTA that supported it -- and would never use it because real RSA is
3541 always available. This code has been removed, because it had the bad
3542 effect of slowing Exim down by computing (never used) parameters for the
3543 RSA_EXPORT functionality.
3545 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3546 authenticator to fail if there's a tab character in the incoming data
3547 (there should never be unless someone is messing about, as it's supposed
3548 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3549 if the connection is using TLS or if the remote IP is the same as the
3550 local IP, and the "valid-client-cert option" if a client certificate has
3553 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3554 authenticators. This can be used for authorization after authentication
3555 succeeds. (In the case of plaintext, it servers for both authentication
3558 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3559 if any retry times were supplied.
3561 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3562 connection, where there is no client IP address to check. In this
3563 situation, the verify now always succeeds.
3565 PH/25 Applied John Jetmore's -Mset patch.
3567 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3569 PH/27 In a string expansion for a processed (not raw) header when multiple
3570 headers of the same name were present, leading whitespace was being
3571 removed from all of them, but trailing whitespace was being removed only
3572 from the last one. Now trailing whitespace is removed from each header
3573 before concatenation. Completely empty headers in a concatenation (as
3574 before) are ignored.
3576 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3577 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3579 PH/29 [Removed. This was a change that I later backed out, and forgot to
3580 correct the ChangeLog entry (that I had efficiently created) before
3581 committing the later change.]
3583 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3584 address errors (4xx response to RCPT) over the same connection as other
3585 messages routed to the same hosts. Such deliveries are always "forced",
3586 so retry times are not inspected. This resulted in far too many retries
3587 for the affected addresses. The effect occurred only when there were more
3588 hosts than the hosts_max_try setting in the smtp transport when it had
3589 the 4xx errors. Those hosts that it had tried were not added to the list
3590 of hosts for which the message was waiting, so if all were tried, there
3591 was no problem. Two fixes have been applied:
3593 (i) If there are any address or message errors in an SMTP delivery, none
3594 of the hosts (tried or untried) are now added to the list of hosts
3595 for which the message is waiting, so the message should not be a
3596 candidate for sending over the same connection that was used for a
3597 successful delivery of some other message. This seems entirely
3598 reasonable: after all the message is NOT "waiting for some host".
3599 This is so "obvious" that I'm not sure why it wasn't done
3600 previously. Hope I haven't missed anything, but it can't do any
3601 harm, as the worst effect is to miss an optimization.
3603 (ii) If, despite (i), such a delivery is accidentally attempted, the
3604 routing retry time is respected, so at least it doesn't keep
3605 hammering the server.
3607 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3608 in ${readsocket because some servers need this prod.
3610 PH/32 Added some extra debug output when updating a wait-xxx database.
3612 PH/33 The hint "could be header name not terminated by colon", which has been
3613 given for certain expansion errors for a long time, was not being given
3614 for the ${if def:h_colon_omitted{... case.
3616 PH/34 The spec says: "With one important exception, whenever a domain list is
3617 being scanned, $domain contains the subject domain." There was at least
3618 one case where this was not true.
3620 PH/35 The error "getsockname() failed: connection reset by peer" was being
3621 written to the panic log as well as the main log, but it isn't really
3622 panic-worthy as it just means the connection died rather early on. I have
3623 removed the panic log writing for the ECONNRESET error when getsockname()
3626 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3627 runs only) independently of the message's sender address. This meant
3628 that, if the 4xx error was in fact related to the sender, a different
3629 message to the same recipient with a different sender could confuse
3630 things. In particular, this can happen when sending to a greylisting
3631 server, but other circumstances could also provoke similar problems.
3632 I have changed the default so that the retry time for these errors is now
3633 based a combination of the sender and recipient addresses. This change
3634 can be overridden by setting address_retry_include_sender=false in the
3637 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3638 remote server are returned as part of bounce messages. This was not
3639 happening for LMTP over a pipe (the lmtp transport), but now it is the
3640 same for both kinds of LMTP.
3642 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3643 in header lines that were in fact CNAMEs. This is no longer the case.
3645 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3646 and queue runs started by the daemon processed all messages. This has
3647 been fixed so that -R and -S can now usefully be given with -q<time>.
3649 PH/40 Import PCRE release 6.7 (fixes some bugs).
3651 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3653 PH/42 Give an error if -q is specified more than once.
3655 PH/43 Renamed the variables $interface_address and $interface_port as
3656 $received_ip_address and $received_port, to make it clear that these
3657 values apply to message reception, and not to the outgoing interface when
3658 a message is delivered. (The old names remain recognized, of course.)
3660 PH/44 There was no timeout on the connect() call when using a Unix domain
3661 socket in the ${readsocket expansion. There now is.
3663 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3664 be meaningful with "accept".
3666 SC/01 Eximstats V1.43
3667 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3669 SC/02 Eximstats V1.44
3670 Use a glob alias rather than an array ref in the generated
3671 parser. This improves both readability and performance.
3673 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3674 Collect SpamAssassin and rejection statistics.
3675 Don't display local sender or destination tables unless
3676 there is data to show.
3677 Added average volumes into the top table text output.
3679 SC/04 Eximstats V1.46
3680 Collect data on the number of addresses (recipients)
3681 as well as the number of messages.
3683 SC/05 Eximstats V1.47
3684 Added 'Message too big' to the list of mail rejection
3685 reasons (thanks to Marco Gaiarin).
3687 SC/06 Eximstats V1.48
3688 Mainlog lines which have GMT offsets and are too short to
3689 have a flag are now skipped.
3691 SC/07 Eximstats V1.49 (Alain Williams)
3692 Added the -emptyok flag.
3694 SC/08 Eximstats V1.50
3695 Fixes for obtaining the IP address from reject messages.
3697 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3698 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3699 whitespace changes from 4.64-PH/27
3701 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3704 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3705 are found, allow negative numbers in numeric criteria)
3707 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3709 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3710 to match changes made in 4.64-PH/43
3712 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3714 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3715 "domain" is actually an IP address, and force a failure. This locks out
3716 those revolvers/nameservers that support "A-for-A" lookups, in
3717 contravention of the specifications.
3719 PH/48 When a host name was looked up from an IP address, and the subsequent
3720 forward lookup of the name timed out, the host name was left in
3721 $sender_host_name, contrary to the specification.
3723 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3724 restricted to single-key lookups, Exim was not diagnosing an error if
3725 * or *@ was used with a query-style lookup.
3727 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3729 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3730 long ago, but noone interested enough thought of it. Let's just say that
3731 the "1.1" means that there are some new functions that weren't there at
3732 some point in the past.
3734 PH/51 Error processing for expansion failure of helo_data from an smtp
3735 transport during callout processing was broken.
3737 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3738 tested/used via the -bh/-bhc/-bs options.
3740 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3741 bug, fixed in subsequent PCRE releases).
3743 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3744 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3746 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3752 SC/01 Use a glob alias rather than an array ref in eximstats generated
3753 parser. This improves both readability and performance.
3755 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3756 Don't display local sender or destination tables in eximstats unless
3757 there is data to show.
3758 Added average volumes into the eximstats top table text output.
3760 SC/03 Collect data on the number of addresses (recipients) as well
3761 as the number of messages in eximstats.
3763 TF/01 Correct an error in the documentation for the redirect router. Exim
3764 does (usually) call initgroups() when daemonizing.
3766 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3767 with consistent privilege compared to when running as a daemon.
3769 TF/03 Note in the spec that $authenticated_id is not set for local
3770 submissions from trusted users.
3772 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3773 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3775 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3776 by adding some example configuration directives to the default
3777 configuration file. A little bit of work is required to uncomment the
3778 directives and define how usernames and passwords are checked, but
3779 there is now a framework to start from.
3781 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3782 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3783 without this. I don't know how relevant this is to other LDAP libraries.
3785 PH/02 Add the verb name to the "unknown ACL verb" error.
3787 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3789 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3791 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3792 directory not expanded when it should be if an expanded home directory
3793 was set for the address (which is overridden by the transport).
3795 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3798 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3799 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3800 because it is too late at that time, and has no effect.
3802 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3803 security issue with \' (bugzilla #107). I could not use the
3804 PQescapeStringConn() function, because it needs a PGconn value as one of
3807 PH/08 When testing addresses using -bt, indicate those final addresses that
3808 are duplicates that would not cause an additional delivery. At least one
3809 person was confused, thinking that -bt output corresponded to deliveries.
3810 (Suppressing duplicates isn't a good idea as you lose the information
3811 about possibly different redirections that led to the duplicates.)
3813 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3814 systems where poll() doesn't work, in particular OS X.
3816 PH/10 Added more information to debugging output for retry time not reached.
3818 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3819 operations in malware.c.
3821 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3824 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3825 syslog_duplication set false, log lines that would normally be written
3826 both the the main log and to the reject log were not written to syslog at
3829 PH/14 In the default configuration, change the use of "message" in ACL warn
3830 statements to "add_header".
3832 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3833 not followed by a command (e.g. "seen endif").
3835 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3836 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3839 PH/17 Added extra conditions to the default value of delay_warning_condition
3843 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3844 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3845 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3848 The Auto-Submitted: and various List- headers are standardised, whereas I
3849 don't think Precedence: ever was.
3851 PH/18 Refactored debugging code in route_finduser() to show more information,
3852 in particular, the error code if getpwnam() issues one.
3854 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3855 This is apparently needed in addition to the PH/07 change above to avoid
3856 any possible encoding problems.
3858 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3859 but not after initializing Perl.
3861 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3862 output them only if debugging. By default they are written stderr,
3863 apparently, which is not desirable.
3865 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3868 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3871 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3873 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3874 authenticated or an ident call has been made. Suppress the default
3875 values for $authenticated_id and $authenticated_sender (but permit -oMai
3876 and -oMas) when testing with -bh.
3878 PH/24 Re-jigged the order of the tests in the default configuration so that the
3879 tests for valid domains and recipients precede the DNS black list and CSA
3880 tests, on the grounds that those ones are more expensive.
3882 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3883 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3884 This bug exists in every version of Exim that I still have, right back to
3887 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3888 However, an attempt to turn on case-sensitivity in a regex key by
3889 including (?-i) didn't work because the subject string was already
3890 lowercased, and the effects were non-intuitive. It turns out that a
3891 one-line patch can be used to allow (?-i) to work as expected.
3897 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3898 other effects) broke the use of negated acl sub-conditions.
3900 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3903 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3904 "Deny" causes Exim to reject the incoming connection with a 554 error.
3905 Unfortunately, if there is a major crisis, such as a disk failure,
3906 tcp-wrappers gives "deny", whereas what one would like would be some
3907 kind of temporary error. A kludge has been added to help with this.
3908 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3909 554 error is used if errno is still zero or contains ENOENT (which occurs
3910 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3913 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3915 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3916 errors. Otherwise a message that provokes a temporary error (when other
3917 messages do not) can cause a whole host to time out.
3919 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3920 addresses were routed directly to files or pipes from a redirect router.
3921 File deliveries just didn't batch; pipe deliveries might have suffered
3924 PH/06 A failure to get a lock for a hints database would erroneously always say
3925 "Failed to get write lock", even when it was really a read lock.
3927 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3928 of 0600. This has been changed to use the value of the lockfile_mode
3929 option (which defaults to 0600).
3931 PH/08 Applied small patch from the Sieve maintainer.
3933 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3934 folder from quota calculations, a direct delivery into this folder messed
3935 up the contents of the maildirsize file. This was because the regex was
3936 used only to exclude .Trash (or whatever) when the size of the mailbox
3937 was calculated. There was no check that a delivery was happening into an
3938 excluded directory. This bug has been fixed by ignoring all quota
3939 processing for deliveries into excluded directories.
3941 PH/10 Added the maildirfolder_create_regex option to appendfile.
3947 PH/01 The code for finding all the local interface addresses on a FreeBSD
3948 system running IPv6 was broken. This may well have applied to all BSD
3949 systems, as well as to others that have similar system calls. The broken
3950 code found IPv4 interfaces correctly, but gave incorrect values for the
3951 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3952 that it would not match correctly against @[] and not recognize the IPv6
3955 PH/02 The ipliteral router was not recognizing addresses of the form user@
3956 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3958 PH/03 Added disable_ipv6.
3960 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3961 decoded form, because it is most often used to construct To: headers
3962 lines in autoreplies, and the decoded form may well be syntactically
3963 invalid. However, $reply_address has leading white space removed, and all
3964 newlines turned into spaces so that the autoreply transport does not
3967 PH/05 If group was specified without a user on a router, and no group or user
3968 was specified on a transport, the group from the router was ignored.
3970 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3971 for visible compile-time settings that can be used to change these
3972 numbers, for those that want even more. Backwards compatibility with old
3973 spool files has been maintained. However, going back to a previous Exim
3974 release will lost any variables that are in spool files.
3976 PH/07 Two small changes when running in the test harness: increase delay when
3977 passing a TCP/IP connection to a new process, in case the original
3978 process has to generate a bounce, and remove special handling of
3979 127.0.0.2 (sic), which is no longer necessary.
3981 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3982 be the same on different OS.
3984 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3987 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3988 whether --show-vars was specified or not
3990 JJ/02 exipick: Added support for new ACL variable spool format introduced
3993 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3994 syntactically invalid From: or Reply-to: line, and a filter used this to
3995 generate an autoreply, and therefore failed to obtain an address for the
3996 autoreply, Exim could try to deliver to a non-existent relative file
3997 name, causing unrelated and misleading errors. What now happens is that
3998 it logs this as a hard delivery error, but does not attempt to create a
4001 PH/11 The exinext utility has a -C option for testing purposes, but although
4002 the given file was scanned by exinext itself; it wasn't being passed on
4003 when Exim was called.
4005 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4006 an end-of-file indication when reading a command response.
4008 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4009 compiled. In many other places in Exim, IPv6 addresses are always
4010 recognized, so I have changed this. It also means that IPv4 domain
4011 literals of the form [IPV4:n.n.n.n] are now always recognized.
4013 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4014 used if the router is not running as root, for example, when verifying at
4015 ACL time, or when using -bh. The debugging output from this situation was
4016 non-existent - all you got was a failure to exec. I have made two
4019 (a) Failures to set uid/gid, the current directory, or a process leader
4020 in a subprocess such as that created by queryprogram now generate
4021 suitable debugging output when -d is set.
4023 (b) The queryprogram router detects when it is not running as root,
4024 outputs suitable debugging information if -d is set, and then runs
4025 the subprocess without attempting to change uid/gid.
4027 PH/15 Minor change to Makefile for building test_host (undocumented testing
4030 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4031 additional section of a DNS packet that returns MX or SRV records.
4032 Instead, it always explicitly searches for A/AAAA records. This avoids
4033 major problems that occur when a DNS server includes only records of one
4034 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4035 fixed another bug: if SRV records were looked up and the corresponding
4036 address records were *not* found in the additional section, the port
4037 values from the SRV records were lost.
4039 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4040 using the correct key (the original address) when searching the retry
4041 rules in order to find which one to use for generating the retry hint.
4043 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4044 adding the default one. Similarly, if it contains a Reply-To: header, the
4045 errors_reply_to option, if set, is not used.
4047 PH/19 When calculating a retry time, Exim used to measure the "time since
4048 failure" by looking at the "first failed" field in the retry record. Now
4049 it does not use this if it is later than than the arrival time of the
4050 message. Instead it uses the arrival time. This makes for better
4051 behaviour in cases where some deliveries succeed, thus re-setting the
4052 "first failed" field. An example is a quota failure for a huge message
4053 when small messages continue to be delivered. Without this change, the
4054 "time since failure" will always be short, possible causing more frequent
4055 delivery attempts for the huge message than are intended.
4056 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4058 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4059 $1, $2, $3) because the numerical variables can be reset during some
4060 expansion items (e.g. "match"), thereby losing the authentication data.
4062 PH/21 Make -bV show the size of off_t variables so that the test suite can
4063 decide whether to run tests for quotas > 2G.
4065 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4066 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4067 filecount value is greater than 2G or if a quota value is greater than 2G
4068 on a system where the size of off_t is not greater than 4, a panic error
4071 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4072 never match. The debug and -bh output now contains an explicit error
4073 message indicating a malformed IPv4 address or mask.
4075 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4076 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4077 PH/23 above applies.
4079 PH/25 Do not write to syslog when running in the test harness. The only
4080 occasion when this arises is a failure to open the main or panic logs
4081 (for which there is an explicit test).
4083 PH/26 Added the /no_tell option to "control=freeze".
4085 PH/27 If a host name lookup failed very early in a connection, for example, if
4086 the IP address matched host_lookup and the reverse lookup yielded a name
4087 that did not have a forward lookup, an error message of the form "no IP
4088 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4089 could be logged. Now it outputs the IP address instead of "NULL".
4091 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4092 allows the sender and the authenticated sender to be set when
4093 submitting a message from within Exim. Since child_open_exim() is
4094 documented for local_scan(), the new function should be too.
4096 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4097 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4098 results in an empty string is now treated as unset.
4100 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4102 PH/31 Added sender_verify_fail logging option.
4104 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4105 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4106 tidied the source and removed it altogether.
4108 PH/33 When a queue run was abandoned because the load average was too high, a
4109 log line was always written; now it is written only if the queue_run log
4110 selector is set. In addition, the log line for abandonment now contains
4111 information about the queue run such as the pid. This is always present
4112 in "start" and "stop" lines but was omitted from the "abandon" line.
4114 PH/34 Omit spaces between a header name and the colon in the error message that
4115 is given when verify = headers_syntax fails (if there are lots of them,
4116 the message gets confusing).
4118 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4119 names, as there are now some PTR records that contain slashes. This check
4120 is only to protect against broken name servers that fall over on strange
4121 characters, so the fact that it applies to all lookups doesn't matter.
4123 PH/36 Now that the new test suite is complete, we can remove some of the
4124 special code in Exim that was needed for the old test suite. For example,
4125 sorting DNS records because real resolvers return them in an arbitrary
4126 order. The new test suite's fake resolver always returns records in the
4129 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4130 bounces) except when queue_only is set, to avoid logging races between
4131 the different processes.
4133 PH/38 Panic-die if .include specifies a non-absolute path.
4135 PH/39 A tweak to the "H" retry rule from its user.
4137 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4138 a label. They prevented compilation on older perls.
4140 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4141 a warning to be raised on newish perls.
4143 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4144 on queue. Changes to match documented behaviour of showing count of
4145 messages matching specified criteria.
4147 PH/40 Changed the default ident timeout from 30s to 5s.
4149 PH/41 Added support for the use of login_cap features, on those BSD systems
4150 that have them, for controlling the resources used by pipe deliveries.
4152 PH/42 The content-scanning code uses fopen() to create files in which to put
4153 message data. Previously it was not paying any attention to the mode of
4154 the files. Exim runs with umask(0) because the rest of the code creates
4155 files with open(), and sets the required mode explicitly. Thus, these
4156 files were ending up world-writeable. This was not a big issue, because,
4157 being within the spool directory, they were not world-accessible. I have
4158 created a function called modefopen, which takes an additional mode
4159 argument. It sets umask(777), creates the file, chmods it to the required
4160 mode, then resets the umask. All the relevant calls to fopen() in the
4161 content scanning code have been changed to use this function.
4163 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4164 to 24 hours. This avoids potential overflow problems when processing G
4165 and H retry rules. I suspect nobody ever tinkers with this value.
4167 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4169 PH/45 When the plaintext authenticator is running as a client, the server's
4170 challenges are checked to ensure they are valid base64 strings. By
4171 default, the authentication attempt is cancelled if an invalid string is
4172 received. Setting client_ignore_invalid_base64 true ignores these errors.
4173 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4174 they are received. Thus, the responses can be made to depend on the
4175 challenges. If an invalid string is ignored, an empty string is placed in
4178 PH/46 Messages that are created by the autoreply transport now contains a
4179 References: header, in accordance with RFCs 2822 and 3834.
4181 PH/47 Added authenticated_sender_force to the smtp transport.
4183 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4185 PH/49 Installed latest patch from the Sieve maintainer.
4187 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4188 was also set, the appendfile transport was unnecessarily scanning a
4189 directory of message files (e.g. for maildir delivery) to find the count
4190 of files (along with the size), even though it did not need this
4191 information. It now does the scan only if it needs to find either the
4192 size of the count of files.
4194 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4196 PH/52 Two bugs concerned with error handling when the smtp transport is
4199 (i) Exim was not creating retry information for temporary errors given
4200 for individual recipients after the DATA command when the smtp transport
4201 was used in LMTP mode. This meant that they could be retried too
4202 frequently, and not timed out correctly.
4204 (ii) Exim was setting the flag that allows error details to be returned
4205 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4206 recipients that were returned after the DATA command.
4208 PH/53 This is related to PH/52, but is more general: for any failing address,
4209 when detailed error information was permitted to be returned to the
4210 sender, but the error was temporary, then after the final timeout, only
4211 "retry timeout exceeded" was returned. Now it returns the full error as
4212 well as "retry timeout exceeded".
4214 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4215 do this, and (what is worse) MTAs that accept it.
4217 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4218 will now be deprecated.
4220 PH/56 New os.c-cygwin from the Cygwin maintainer.
4222 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4223 formats (previously only available in exim formats via -bpr, -bpru,
4224 and -bpra. Now also available in native and exiqgrep formats)
4226 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4227 with very large, slow to parse queues
4229 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4231 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4233 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4234 responses to authentication challenges, though it was showing the
4235 challenges; (ii) I've removed the CR characters from the debug output for
4238 PH/58 Allow for the insertion of a newline as well as a space when a string
4239 is turned into more than one encoded-word during RFC 2047 encoding. The
4240 Sieve code now uses this.
4242 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4243 data_4xx, lost_connection, tls_required.
4245 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4246 message was being sent as an SMTP response.
4248 PH/61 Add -l and -k options to exicyclog.
4250 PH/62 When verifying, if an address was redirected to one new address, so that
4251 verification continued, and the new address failed or deferred after
4252 having set something in $address_data, the value of $address_data was not
4253 passed back to the ACL. This was different to the case when no
4254 redirection occurred. The value is now passed back in both cases.
4256 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4257 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4258 use login_cap.h, so on its own it isn't the distinguishing feature. The
4259 new name refers directly to the setclassresources() function.
4261 PH/65 Added configuration files for NetBSD3.
4263 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4265 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4266 is preferred over IPv4.
4268 PH/68 The bounce_return_message and bounce_return_body options were not being
4269 honoured for bounces generated during the reception of non-SMTP messages.
4270 In particular, this applied to messages rejected by the ACL. This bug has
4271 been fixed. However, if bounce_return_message is true and bounce_return_
4272 body is false, the headers that are returned for a non-SMTP message
4273 include only those that have been read before the error was detected.
4274 (In the case of an ACL rejection, they have all been read.)
4276 PH/69 The HTML version of the specification is now built in a directory called
4277 spec_html instead of spec.html, because the latter looks like a path with
4278 a MIME-type, and this confuses some software.
4280 PH/70 Catch two compiler warnings in sieve.c.
4282 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4283 function verify_get_ident() calls ip_connect() to connect a socket, but
4284 if the "connect()" function timed out, ip_connect() used to close the
4285 socket. However, verify_get_ident() also closes the socket later, and in
4286 between Exim writes to the log, which may get opened at this point. When
4287 the socket was closed in ip_connect(), the log could get the same file
4288 descriptor number as the socket. This naturally causes chaos. The fix is
4289 not to close the socket in ip_connect(); the socket should be closed by
4290 the function that creates it. There was only one place in the code where
4291 this was missing, in the iplookup router, which I don't think anybody now
4292 uses, but I've fixed it anyway.
4294 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4295 well as to direct DNS lookups. Otherwise the handling of names in host
4296 lists is inconsistent and therefore confusing.
4302 PH/01 Two changes to the default runtime configuration:
4304 (1) Move the checks for relay_from_hosts and authenticated clients from
4305 after to before the (commented out) DNS black list checks.
4307 (2) Add control=submission to the relay_from_hosts and authenticated
4308 clients checks, on the grounds that messages accepted by these
4309 statements are most likely to be submissions.
4311 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4313 (1) Generate an error if the third argument for the ${prvs expansion is
4316 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4319 (3) Reset the variables that are obtained from the first argument of
4320 ${prvscheck and used in the second argument before leaving the code,
4321 because their memory is reclaimed, so using them afterwards may do
4324 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4325 one (it's much easier than Tom thought :-).
4327 (5) Because of (4), we can now allow for the use of $prvscheck_result
4328 inside the third argument.
4330 PH/03 For some reason, the default setting of PATH when running a command from
4331 a pipe transport was just "/usr/bin". I have changed it to
4334 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4335 anything to be listed in the output from -bV.
4337 PH/05 When a filter generated an autoreply, the entire To: header line was
4338 quoted in the delivery log line, like this:
4340 => >A.N.Other <ano@some.domain> <original@ddress> ...
4342 This has been changed so that it extracts the operative address. There
4343 may be more than one such address. If so, they are comma-separated, like
4346 => >ano@some.domain,ona@other.domain <original@ddress> ...
4348 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4349 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4350 not being looked up in the rDNS to get a host name, Exim was showing the
4351 IP address twice in Received: lines, even though the IP addresses were
4352 identical. For example:
4354 Received: from [1.2.3.4] (helo=[1.2.3.4])
4356 However, if the real host name was known, it was omitting the HELO data
4357 if it matched the actual IP address. This has been tidied up so that it
4358 doesn't show the same IP address twice.
4360 PH/07 When both +timestamp and +memory debugging was on, the value given by
4361 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4362 called by the debug printing, thereby overwriting the timestamp buffer.
4363 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4365 PH/08 When the original message was included in an autoreply transport, it
4366 always said "this is a copy of the message, including all the headers",
4367 even if body_only or headers_only was set. It now gives an appropriate
4370 PH/09 Applied a patch from the Sieve maintainer which:
4372 o fixes some comments
4373 o adds the (disabled) notify extension core
4374 o adds some debug output for the result of if/elsif tests
4375 o points to the current vacation draft in the documentation
4376 and documents the missing references header update
4380 o fixes a bug in processing the envelope test (when testing
4381 multiple envelope elements, the last element determined the
4384 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4385 Electronic Mail") by including:
4387 Auto-submitted: auto-generated
4389 in the messages that it generates (bounce messages and others, such as
4390 warnings). In the case of bounce messages for non-SMTP messages, there was
4391 also a typo: it was using "Auto_submitted" (underscore instead of
4392 hyphen). Since every message generated by Exim is necessarily in response
4393 to another message, thes have all been changed to:
4395 Auto-Submitted: auto-replied
4397 in accordance with these statements in the RFC:
4399 The auto-replied keyword:
4401 - SHOULD be used on messages sent in direct response to another
4402 message by an automatic process,
4404 - MUST NOT be used on manually-generated messages,
4406 - MAY be used on Delivery Status Notifications (DSNs) and Message
4407 Disposition Notifications (MDNs),
4409 - MUST NOT be used on messages generated by automatic or periodic
4410 processes, except for messages which are automatic responses to
4413 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4414 to the default Received: header definition.
4416 PH/12 Added log selector acl_warn_skipped (default on).
4418 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4419 variables because (a) they are in the wrong storage pool and (b) even if
4420 they were copied, it wouldn't work properly because of the caching.
4422 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4423 checking when decoding. Apparently there are clients that generate
4424 overlong encoded strings. Why am I not surprised?
4426 PH/15 If the first argument of "${if match_address" was not empty, but did not
4427 contain an "@" character, Exim crashed. Now it writes a panic log message
4428 and treats the condition as false.
4430 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4432 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4433 extension "envelope-auth". The code is finished and in agreement with
4434 other implementations, but there is no documentation so far and in fact,
4435 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4436 not changing the active code.
4438 Print executed "if" and "elsif" statements when debugging is used. This
4439 helps a great deal to understand what a filter does.
4441 Document more things not specified clearly in RFC3028. I had all this
4442 sorted out, when out of a sudden new issues came to my mind. Oops."
4444 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4447 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4448 canonical form (as documented). However, after a host name lookup from
4449 the IP address, check_host() was doing a simple string comparison with
4450 addresses acquired from the DNS when checking that the found name did
4451 have the original IP as one of its addresses. Since any found IPv6
4452 addresses are likely to be in abbreviated form, the comparison could
4453 fail. Luckily, there already exists a function for doing the comparison
4454 by converting both addresses to binary, so now that is used instead of
4455 the text comparison.
4457 PH/20 There was another similar case to PH/19, when a complete host name was
4458 given in a host list; looking up its IP address could give an abbreviated
4459 form, whereas the current host's name might or might not be abbreviated.
4460 The same fix has been applied.
4466 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4467 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4470 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4471 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4473 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4475 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4476 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4477 Also, for "Auto-Submitted", treat anything other than "no" as
4478 non-personal, in accordance with RFC 3834. (Previously it treated
4479 anything starting "auto-" as non-personal.)
4481 TF/01 The control=submission/name=... option had a problem with syntax
4482 errors if the name included a slash character. The /name= option
4483 now slurps the rest of the string, so it can include any characters
4484 but it must come last in the list of options (after /sender_retain
4487 PH/05 Some modifications to the interface to the fake nameserver for the new
4495 TK/01 Added the "success_on_redirect" address verification option. See
4496 NewStuff for rationale and an example.
4498 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4500 PH/02 Patch to exigrep to allow it to work on syslog lines.
4502 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4503 fread() to skip over the body file's header line, because in Cygwin the
4504 header line is locked and is inaccessible.
4506 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4507 co-exist for some time) to make it clear that it is the Exim ID that is
4508 referenced, not the Message-ID: header line.
4510 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4511 string_format() function, because snprintf() does not exist on all
4514 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4515 ${stat: expansion item.
4517 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4518 protocol synchronization error", to keep the pedants happy.
4520 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4521 well as for IRIX systems, when gcc is being used. See the host.c source
4524 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4526 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4529 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4530 transport and to the smtp transport in LMTP mode.
4532 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4534 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4535 run a filter in a subprocess. This could lead to confusion in subsequent
4536 lookups in the parent process. There should also be a search_tidyup() at
4537 the end of the subprocess.
4539 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4540 only if the host matched helo_try_verify_hosts, which caused the
4541 verification to occur when the EHLO/HELO command was issued. The ACL just
4542 tested the remembered result. Now, if a previous verification attempt has
4543 not happened, "verify = helo" does it there and then.
4545 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4547 TK/03 Fix log output including CR from clamd.
4549 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4550 exist provoked a memory error which could cause a segfault.
4552 PH/15 Installed PCRE 6.2
4554 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4556 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4557 of the problem. Specifically, suggested +O2 rather than +O1 for the
4560 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4562 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4563 record, the port was not correctly logged when the outgoing_port log
4564 selector was set (it logged the transort's default port).
4566 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4567 fallback_hosts, and "hosts" in the smtp transport.
4569 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4570 host errors such as "Connection refused".
4572 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4573 authentication with radiusclient 0.4.9:
4575 - Error returned from rc_read_config was caught wrongly
4576 - Username/password not passed on to radius server due to wrong length.
4578 The presumption is that some radiusclient API changes for 4.51/PH/17
4579 were not taken care of correctly. The code is still untested by me (my
4580 Linux distribution still has 0.3.2 of radiusclient), but it was
4581 contributed by a Radius user.
4583 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4584 expanding the "port" option of the smtp transport.
4586 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4587 while reading a MIME header. Thanks to Tom Hughes for a patch.
4589 PH/24 Include config.h inside local_scan.h so that configuration settings are
4592 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4593 that in an ACL for RCPT (for example), you can examine exactly what was
4596 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4597 commands, but it was not correctly comparing the address with the actual
4598 client host address. Thus, it would show the EHLO address in Received:
4599 header lines when this was not necessary.
4601 PH/27 Added the % operator to ${eval:}.
4603 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4604 it should be ignoring failures (because with -C, for example, it has lost
4605 privilege). It wasn't ignoring creation failures other than "already
4608 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4611 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4612 because an input line was too long, either on its own, or by virtue of
4613 too many continuations, the temporary file was not being removed, and the
4614 return code was incorrect.
4616 PH/31 Missing "BOOL" in function definition in filtertest.c.
4618 PH/32 Applied Sieve patches from the maintainer.
4620 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4622 PH/33 Added "verify = not_blind".
4624 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4625 Local/Makefile (with some defaults set). These are used in built scripts
4626 such as exicyclog, but they have never been used in the exim_install
4627 script (though there are many overriding facilities there). I have
4628 arranged that the exim_install script now takes note of these two
4631 PH/35 Installed configuration files for Dragonfly.
4633 PH/36 When a locally submitted message by a trusted user did not contain a
4634 From: header, and the sender address was obtained from -f or from an SMTP
4635 MAIL command, and the trusted user did not use -F to supply a sender
4636 name, $originator_name was incorrectly used when constructing a From:
4637 header. Furthermore, $originator_name was used for submission mode
4638 messages from external hosts without From: headers in a similar way,
4639 which is clearly wrong.
4641 PH/37 Added control=suppress_local_fixups.
4643 PH/38 When log_selector = +received_sender was set, and the addition of the
4644 sender made the log line's construction buffer exactly full, or one byte
4645 less than full, an overflow happened when the terminating "\n" was
4648 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4649 when the result of a list match is failure because a DNS lookup failed.
4651 PH/40 RM_COMMAND is now used in the building process.
4653 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4654 the "build-* directories that it finds.
4656 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4657 address in a domain literal was a prefix of an interface address.
4659 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4660 when verifying a sender address, unless rewrite_headers is false.
4662 PH/44 Wrote a long comment about why errors_to addresses are verified as
4663 recipients, not senders.
4665 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4666 the ratelimit ACL was added.
4668 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4670 PH/46 Added extra information about PostgreSQL errors to the error string.
4672 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4673 avoiding the need to install special zones in a real server. This is
4674 backwards compatible; if it can't find the fake resolver, it drops back.
4675 Thus, both old and new test suites can be run.
4677 TF/02 Added util/ratelimit.pl
4679 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4680 clock is set back in time.
4682 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4683 Candler <B.Candler@pobox.com>.
4685 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4686 OK for addresses that are the result of redirections.
4688 PH/48 A number of further additions for the benefit of the new test suite,
4689 including a fake gethostbyname() that interfaces to the fake DNS resolver
4692 TF/06 The fix for widen_domains has also been applied to qualify_single and
4693 search_parents which are the other dnslookup options that can cause
4696 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4699 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4701 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4702 service" if it encountered an MX record with an empty target hostname.
4703 The message is now "an MX or SRV record indicated no SMTP service".
4705 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4706 if the DNS of the sending site is misconfigured. This is quite a
4707 common situation. This change restores the behaviour of treating a
4708 helo verification defer as a failure.
4710 PH/51 If self=fail was set on a router, the bounce message did not include the
4711 actual error message.
4717 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4719 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4720 command itself ended in error, the underlying message about the transport
4721 filter timeout was being overwritten with the pipe command error. Now the
4722 underlying error message should be appended to the second error message.
4724 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4726 PH/02 Reduce the amount of output that "make" produces by default. Full output
4727 can still be requested.
4729 PH/03 The warning log line about a condition test deferring for a "warn" verb
4730 was being output only once per connection, rather than after each
4731 occurrence (because it was using the same function as for successful
4732 "warn" verbs). This seems wrong, so I have changed it.
4734 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4735 it should not have, which might have caused a crash in the right
4736 circumstances, but probably never did.
4738 PH/04 Installed a modified version of Tony Finch's patch to make submission
4739 mode fix the return path as well as the Sender: header line, and to
4740 add a /name= option so that you can make the user's friendly name appear
4743 TF/03 Added the control = fakedefer ACL modifier.
4745 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4746 Mark Lowes for thorough testing.
4748 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4750 TK/03 Merged latest SRS patch from Miles Wilton.
4752 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4753 with the definition in sysexits.h (which is #included earlier).
4754 Fortunately, Exim does not actually use EX_OK. The code used to try to
4755 preserve the sysexits.h value, by assuming that macro definitions were
4756 scanned for macro replacements. I have been disabused of this notion,
4757 so now the code just undefines EX_OK before #including unistd.h.
4759 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4760 in the smtp transport. When a block could not be written in a single
4761 write() function, the timeout was being re-applied to each part-write.
4762 This seems wrong - if the receiver was accepting one byte at a time it
4763 would take for ever. The timeout is now adjusted when this happens. It
4764 doesn't have to be particularly precise.
4766 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4767 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4769 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4770 without a domain if the check to <postmaster@domain> fails.
4772 SC/01 Eximstats: added -xls and the ability to specify output files
4773 (patch written by Frank Heydlauf).
4775 SC/02 Eximstats: use FileHandles for outputting results.
4777 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4779 SC/04 Eximstats: fixed display of large numbers with -nvr option
4781 SC/05 Eximstats: fixed merging of reports with empty tables.
4783 SC/06 Eximstats: added the -include_original_destination flag
4785 SC/07 Eximstats: removed tabs and trailing whitespace.
4787 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4789 TK/06 MBOX spool code: Add real "From " MBOX separator line
4790 so the .eml file is really in mbox format (even though
4791 most programs do not really care). Patch from Alex Miller.
4793 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4794 The latter is generated from $received_to and is only set if the
4795 message has one envelope recipient. SA can use these headers,
4796 obviously out-of-the-box. Patch from Alex Miller.
4798 PH/08 The ${def test on a variable was returning false if the variable's
4799 value was "0", contrary to what the specification has always said!
4800 The result should be true unless the variable is empty.
4802 PH/09 The syntax error of a character other than { following "${if
4803 def:variable_name" (after optional whitespace) was not being diagnosed.
4804 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4805 accidental colon was present, for example, could give incorrect results.
4807 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4808 result is used (not including appendfile, where other changes are about
4811 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4812 This involved changing a lot of size variables from int to off_t. It
4813 should work with maildirs and everything.
4815 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4816 spamd dying while we are connected to it.
4818 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4821 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4822 function for BDB 4.3.
4824 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4826 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4827 the sources for PCRE have been re-arranged and more files are now
4830 PH/15 The code I had for printing potentially long long variables in PH/11
4831 above was not the best (it lost precision). The length of off_t variables
4832 is now inspected at build time, and an appropriate printing format (%ld
4833 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4834 to be "long long int" or "long int". This is needed for the internal
4835 formatting function string_vformat().
4837 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4838 the configuration file to be ":syslog", then the script "guesses" where
4839 the logs files are, rather than using the compiled in default. In our
4840 case the guess is not the same as the compiled default, so the script
4841 suddenly stopped working when I started to use syslog. The patch checks
4842 to see if log_file_path is "". If so, it attempts to read it from exim
4843 with no configuration file to get the compiled in version, before it
4844 falls back to the previous guessing code."
4846 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4847 implementing BATV in an Exim configuration. See NewStuff for the gory
4850 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4851 Makefile that are specific to HP-UX.
4853 PH/18 If the "use_postmaster" option was set for a recipient callout together
4854 with the "random" option, the postmaster address was used as the MAIL
4855 FROM address for the random test, but not for the subsequent recipient
4856 test. It is now used for both.
4858 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4859 patch removes a few documentation additions to RFC 3028, because the
4860 latest draft now contains them. It adds the new en;ascii-case comparator
4861 and a new error check for 8bit text in MIME parts. Comparator and
4862 require names are now matched exactly. I enabled the subaddress
4863 extension, but it is not well tested yet (read: it works for me)."
4865 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4866 rework some of the code of TK/09 above to avoid the hardwired use of
4867 "%lld" and "long long". Replaced the call to snprintf() with a call to
4870 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4871 records point to non-existent hosts", "retry timeout exceeded", and
4872 "retry time not reached for any host after a long failure period".
4874 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4875 experimental DomainKeys support:
4877 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4878 (2) On an error such as an illegally used "control", the wrong name for
4879 the control was given.
4881 These problems did NOT occur unless DomainKeys support was compiled.
4883 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4885 PH/24 Added ${if match_ip condition.
4887 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4888 databases so that it will be absolutely obvious if a crash occurs in the
4889 DB library. This is a regular occurrence (often caused by mis-matched
4892 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4893 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4894 picked up on a user's system that detects such things. There doesn't seem
4895 to be a gcc warning option for this - only an attribute that has to be
4896 put on the function's prototype. It seems that in Fedora Core 4 they have
4897 set this on a number of new functions. No doubt there will be more in due
4900 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4901 specify a transport. However, if an address that was verified by such a
4902 router was the subject of a callout, Exim crashed because it tried to
4903 read the rcpt_include_affixes from the non-existent transport. Now it
4904 just assumes that the setting of that option is false. This bug was
4905 introduced by 4.51/PH/31.
4907 PH/28 Changed -d+all to exclude +memory, because that information is very
4908 rarely of interest, but it makes the output a lot bigger. People tend to
4909 do -d+all out of habit.
4911 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4912 code in os-type was giving problems when libc.so lives in lib64, like on
4915 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4916 aren't the modern standard, and it seems that some systems' include files
4917 don't always have them. Exim was already checking for some of the newer
4918 ones like T_AAAA, and defining it itself. I've added checks for all the
4919 record types that Exim uses.
4921 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4922 not automatically generating a new one, as it is supposed to. This
4923 prevented TLS from working. If the file did exist, but contained invalid
4924 data, a new version was generated, as expected. It was only the case of a
4925 non-existent file that was broken.
4927 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4928 with a change in libdomainkeys > 0.64.
4930 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4931 from DNS. If the selector record carries the flag, it now has
4932 precedence over the domain-wide flag.
4934 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4936 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4937 the use of a port name that isn't defined in /etc/services) occurred, the
4938 message was deferred as in a normal delivery, and thus remained on the
4939 spool, instead of being failed because of the mua_wrapper setting. This
4940 is now fixed, and I tidied up some of the mua_wrapper messages at the
4943 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4944 the messages in a hash of arrays rather than using individual hashes.
4945 This is a bit cleaner and results in dramatic memory savings, albeit
4946 at a slight CPU cost.
4948 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4949 as requested by Marc Sherman.
4951 SC/10 Eximstats: added histograms for user specified patterns as requested
4954 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4956 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4957 fopen() in the content-scanning modules that did not already have it.
4963 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4964 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4966 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4968 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4970 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4971 to test Sieve filters that use "vacation".
4973 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4974 that changes the way the GnuTLS parameters are stored in the cache file.
4975 The new format can be generated externally. For backward compatibility,
4976 if the data in the cache doesn't make sense, Exim assumes it has read an
4977 old-format file, and it generates new data and writes a new file. This
4978 means that you can't go back to an older release without removing the
4981 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4982 work if there are any delivery delays because "one_time" forces the
4983 parent to be marked "delivered", so its unseen clone is never tried
4984 again. For this reason, Exim now forbids the simultaneous setting of
4987 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4988 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4989 entry if you want to know the details. The fix, however, neglected to
4990 consider the case when local delivery batching is involved. The test for
4991 "previously delivered" was not happening when checking to see if an
4992 address could be batched with a previous (undelivered) one; under
4993 certain circumstances this could lead to multiple deliveries to the same
4996 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4997 in its include files, and this causes problems building Exim.
4999 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5000 header_syntax) but Exim was just ignoring anything given after a slash.
5001 In particular, this caused confusion with an attempt to use "verify =
5002 reverse_host_lookup/defer_ok". An error is now given when options are
5003 supplied for verify items that do not have them. (Maybe reverse_host_
5004 lookup should have a defer_ok option, but that's a different point.)
5006 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5007 defined by RFC 821) to 2048, because there were problems with some AUTH
5008 commands, and RFC 1869 says the size should be increased for extended
5009 SMTP commands that take arguments.
5011 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5014 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5015 "unknown" error; now it says that the functionality isn't in the binary.
5017 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5018 an address' error message when a string expansion fails (syntax or
5019 whatever). Otherwise the password may appear in the log. Following change
5020 PH/42 below, there is no longer a chance of it appearing in a bounce
5023 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5025 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5026 of its addresses was ever tried. (Bugzilla bug #2.)
5028 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5029 the result incorrectly in the debug output. (It correctly added a newline
5030 to what was transported.)
5032 TF/01 Added $received_time.
5034 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5035 commented out examples of how to interface to a virus scanner and to
5036 SpamAssassin. Also added commented examples of av_scanner and
5037 spamd_address settings.
5039 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5040 and controls are allowed in which ACLs. There were a couple of minor
5041 errors. Some of the entries in the conditions table (which is a table of
5042 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5043 negation of where the condition IS allowed.
5045 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5047 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5048 header file does not have a version number, so I've had to invent a new
5049 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5050 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5051 radiusclient), but it was contributed by a Radius user.
5053 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5054 files or directories, for OpenSSL.
5056 PH/19 When an Exim process that is running as root has to create an Exim log
5057 file, it does so in a subprocess that runs as exim:exim so as to get the
5058 ownership right at creation (otherwise, other Exim processes might see
5059 the file with the wrong ownership). There was no test for failure of this
5060 fork() call, which would lead to the process getting stuck as it waited
5061 for a non-existent subprocess. Forks do occasionally fail when resources
5062 run out. I reviewed all the other calls to fork(); they all seem to check
5065 PH/20 When checking for unexpected SMTP input at connect time (before writing
5066 the banner), Exim was not dealing correctly with a non-positive return
5067 from the read() function. If the client had disconnected by this time,
5068 the result was a log entry for a synchronization error with an empty
5069 string after "input=" when read() returned zero. If read() returned -1
5070 (an event I could not check), uninitialized data bytes were printed.
5071 There were reports of junk text (parts of files, etc) appearing after
5074 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5076 PH/22 Added support for macro redefinition, and (re)definition in between
5077 driver and ACL definitions.
5079 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5080 forgetting to use the resulting value; it was using the unexpanded value.
5082 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5083 hadn't been configured. The fix is from Juergen Kreileder, who
5084 understands it better than I do:
5086 "Here's what I see happening with three configured cyrus_sasl
5087 authenticators configured (plain, login, cram-md5):
5089 On startup auth_cyrus_sasl_init() gets called for each of these.
5090 This means three calls to sasl_listmech() without a specified mech_list.
5091 => SASL tests which mechs of all available mechs actually work
5092 => three warnings about OTP not working
5093 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5095 With the patch, sasl_listmech() also gets called three times. But now
5096 SASL's mech_list option is set to the server_mech specified in the the
5097 authenticator. Or in other words, the answer from sasl_listmech()
5098 gets limited to just the mech you're testing for (which is different
5100 => the return list contains just 'plain' or 'login', 'cram-md5' or
5101 nothing depending on the value of ob->server_mech.
5103 I've just tested the patch: Authentication still works fine,
5104 unavailable mechs specified in the exim configuration are still
5105 caught, and the auth.log warnings about OTP are gone."
5107 PH/25 When debugging is enabled, the contents of the command line are added
5108 to the debugging output, even when log_selector=+arguments is not
5111 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5112 answer is "GNU", and only if the return is "GNU/something" is the answer
5115 PH/27 $acl_verify_message is now set immediately after the failure of a
5116 verification in an ACL, and so is available in subsequent modifiers. In
5117 particular, the message can be preserved by coding like this:
5119 warn !verify = sender
5120 set acl_m0 = $acl_verify_message
5122 Previously, $acl_verify_message was set only while expanding "message"
5123 and "log_message" when a very denied access.
5125 PH/28 Modified OS/os.c-Linux with
5127 -#ifndef OS_LOAD_AVERAGE
5128 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5130 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5131 nomenclature these days.)
5133 PH/29 Installed patch from the Sieve maintainer that adds the options
5134 sieve_useraddress and sieve_subaddress to the redirect router.
5136 PH/30 In these circumstances:
5137 . Two addresses routed to the same list of hosts;
5138 . First host does not offer TLS;
5139 . First host accepts first address;
5140 . First host gives temporary error to second address;
5141 . Second host offers TLS and a TLS session is established;
5142 . Second host accepts second address.
5143 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5144 and peerdn, if requested) that were in fact used only for the second
5147 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5148 attention to any local part prefix or suffix that was matched by the
5149 router that accepted the address. It now behaves in the same way as it
5150 does for delivery: the affixes are removed from the local part unless
5151 rcpt_include_affixes is set on the transport.
5153 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5154 timeout during the DATA phase of an incoming message.
5156 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5157 applied a patch sanctioned by the Sieve maintainer.
5159 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5160 the uid or gid is negative. A case of a negative gid caused this to be
5161 noticed. The fix allows for either to be negative.
5163 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5164 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5167 PH/36 The change PH/12 above was broken. Fixed it.
5169 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5170 the grounds that routing the same address twice would always produce the
5171 same answer. This might have been true once, but it is certainly no
5172 longer true now. Routing a child address may depend on the previous
5173 routing that produced that child. Some complicated redirection strategies
5174 went wrong when messages had multiple recipients, and made Exim's
5175 behaviour dependent on the order in which the addresses were given.
5177 I have moved the duplicate checking until after the routing is complete.
5178 Exim scans the addresses that are assigned to local and remote
5179 transports, and removes any duplicates. This means that more work will be
5180 done, as duplicates will always all be routed, but duplicates are
5181 presumably rare, so I don't expect this is of any significance.
5183 For deliveries to pipes, files, and autoreplies, the duplicate checking
5184 still happens during the routing process, since they are not going to be
5187 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5188 It corrects a timeout issue with spamd. This is Ian's comment: "The
5189 background is that sometimes spamd either never reads data from a
5190 connection it has accepted, or it never writes response data. The exiscan
5191 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5192 blindly assumes that writes won't block so it may never time out."
5194 PH/39 Allow G after quota size as well as K and M.
5196 PH/40 The value set for $authenticated_id in an authenticator may not contain
5197 binary zeroes or newlines because the value is written to log lines and
5198 to spool files. There was no check on this. Now the value is run through
5199 the string_printing() function so that such characters are converted to
5200 printable escape sequences.
5202 PH/41 $message_linecount is a new variable that contains the total number of
5203 lines in the message. Compare $body_linecount, which is the count for the
5206 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5207 bounce and delay warning messages, except in certain special cases, which
5210 (a) An SMTP error message from a remote host;
5211 (b) A message specified in a :fail: redirection;
5212 (c) A message specified in a "fail" command in a system filter;
5213 (d) A message specified in a FAIL return from the queryprogram router;
5214 (e) A message specified by the cannot_route_message router option.
5216 In these cases only, Exim does include the error details in bounce and
5217 warning messages. There are also a few cases where bland messages such
5218 as "unrouteable address" or "local delivery error" are given.
5220 PH/43 $value is now also set for the "else" part of a ${run expansion.
5222 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5223 being worked on, but at least Exim now implements the latest version to
5226 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5227 process to complete was treated as a delivery failure, a timeout while
5228 writing the message to the pipe was logged, but erroneously treated as a
5229 successful delivery. Such timeouts include transport filter timeouts. For
5230 consistency with the overall process timeout, these timeouts are now
5231 treated as errors, giving rise to delivery failures by default. However,
5232 there is now a new Boolean option for the pipe transport called
5233 timeout_defer, which, if set TRUE, converts the failures into defers for
5234 both kinds of timeout. A transport filter timeout is now identified in
5237 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5238 systems where "make" and "gmake" are different, calling "gmake" at top
5239 level broke things. I've arranged for the value of $(MAKE) to be passed
5240 from the Makefile to this script so that it can call the same version of
5244 A note about Exim versions 4.44 and 4.50
5245 ----------------------------------------
5247 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5248 changes of various kinds. As a consequence, a big documentation update was
5249 needed. This delayed the release for rather longer than seemed good, especially
5250 in the light of a couple of (minor) security issues. Therefore, the changes
5251 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5252 release. So 4.44 and 4.50 are in effect two different branches that both start
5255 I have left the 4.50 change log unchanged; it contains all the changes since
5256 4.43. The change log for 4.44 is below; many of its items are identical to
5257 those for 4.50. This seems to be the most sensible way to preserve the
5258 historical information.
5264 1. Minor wording change to the doc/README.SIEVE file.
5266 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5267 computation of the current number of files was incorrect.
5269 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5270 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5273 4. Give more explanation in the error message when the command for a transport
5274 filter fails to execute.
5276 5. There are several places where Exim runs a non-Exim command in a
5277 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5278 was being done only for the command run by the queryprogram router. It is
5279 now done for all such subprocesses. The other cases are: ${run, transport
5280 filters, and the commands run by the lmtp and pipe transports.
5282 6. Added CONFIGURE_GROUP build-time option.
5284 7. Some older OS have a limit of 256 on the maximum number of file
5285 descriptors. Exim was using setrlimit() to set 1000 as a large value
5286 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5287 systems. I've change it so that if it can't get 1000, it tries for 256.
5289 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5290 was an oversight, and furthermore, ever since the addition of extra
5291 controls (e.g. 4.43/32), the checks on when to allow different forms of
5292 "control" were broken. There should now be diagnostics for all cases when a
5293 control that does not make sense is encountered.
5295 9. Added the /retain_sender option to "control=submission".
5297 10. $recipients is now available in the predata ACL (oversight).
5299 11. Tidy the search cache before the fork to do a delivery from a message
5300 received from the command line. Otherwise the child will trigger a lookup
5301 failure and thereby defer the delivery if it tries to use (for example) a
5302 cached ldap connection that the parent has called unbind on.
5304 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5305 of $address_data from the recipient verification was clobbered by the
5306 sender verification.
5308 13. The value of address_data from a sender verification is now available in
5309 $sender_address_data in subsequent conditions in the ACL statement.
5311 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5313 15. Added a new option "connect=<time>" to callout options, to set a different
5316 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5317 was its contents. (It was OK if the option was not defined at all.)
5319 17. A "Completed" log line is now written for messages that are removed from
5320 the spool by the -Mrm option.
5322 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5323 information about exactly what failed.
5325 19. Added -dd to debug only the daemon process.
5327 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5328 handles timeouts, both on the server side and network timeouts. Renamed the
5329 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5331 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5332 It is now set to "smtps".
5334 22. $host_address is now set to the target address during the checking of
5335 ignore_target_hosts.
5337 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5338 being passed; this would have caused $sender_host_name to have been used if
5339 matching the list had actually called for a host name (not very likely,
5340 since this list is usually IP addresses). A host name is now passed as
5343 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5344 code that specifies a non-restarting handler (typically sigaction() in
5345 modern systems) in an attempt to fix a rare and obscure crash bug.
5347 25. Narrowed the window for a race in the daemon that could cause it to ignore
5348 SIGCHLD signals. This is not a major problem, because they are used only to
5349 wake it up if nothing else does.
5351 26. A malformed maildirsize file could cause Exim to calculate negative values
5352 for the mailbox size or file count. Odd effects could occur as a result.
5353 The maildirsize information is now recalculated if the size or filecount
5356 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5357 support for a long time. Removed HAVE_SYS_VFS_H.
5359 28. Installed the latest version of exipick from John Jetmore.
5361 29. In an address list, if the pattern was not a regular expression, an empty
5362 subject address (from a bounce message) matched only if the pattern was an
5363 empty string. Non-empty patterns were not even tested. This was the wrong
5364 because it is perfectly reasonable to use an empty address as part of a
5365 database query. An empty address is now tested by patterns that are
5366 lookups. However, all the other forms of pattern expect the subject to
5367 contain a local part and a domain, and therefore, for them, an empty
5368 address still always fails if the pattern is not itself empty.
5370 30. Exim went into a mad DNS loop when attempting to do a callout where the
5371 host was specified on an smtp transport, and looking it up yielded more
5372 than one IP address.
5374 31. Re-factored the code for checking spool and log partition space into a
5375 function that finds that data and another that does the check. The former
5376 is then used to implement four new variables: $spool_space, $log_space,
5377 $spool_inodes, and $log_inodes.
5379 32. The RFC2047 encoding function was originally intended for short strings
5380 such as real names; it was not keeping to the 75-character limit for
5381 encoded words that the RFC imposes. It now respects the limit, and
5382 generates multiple encoded words if necessary. To be on the safe side, I
5383 have increased the buffer size for the ${rfc2047: expansion operator from
5386 33. It is now permitted to omit both strings after an "if" condition; if the
5387 condition is true, the result is "true". As before, when the second string
5388 is omitted, a false condition yields an empty string. This makes it less
5389 cumbersome to write custom ACL and router conditions.
5391 34. Failure to deliver a bounce message always caused it to be frozen, even if
5392 there was an errors_to setting on the router. The errors_to setting is now
5395 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5396 canonical form (fully expanded) before being placed in
5397 $sender_host_address.
5399 36. The table in the code that translates DNS record types into text (T_A to
5400 "A" for instance) was missing entries for NS and CNAME. It is just possible
5401 that this could have caused confusion if both these types were looked up
5402 for the same domain, because the text type is used as part of Exim's
5403 per-process caching. But the chance of anyone hitting this buglet seems
5406 37. The dnsdb lookup has been extended in a number of ways.
5408 (1) There is a new type, "zns", which walks up the domain tree until it
5409 finds some nameserver records. It should be used with care.
5411 (2) There is a new type, "mxh", which is like "mx" except that it returns
5412 just the host names, not the priorities.
5414 (3) It is now possible to give a list of domains (or IP addresses) to be
5415 looked up. The behaviour when one of the lookups defers can be
5416 controlled by a keyword.
5418 (4) It is now possible to specify the separator character for use when
5419 multiple records are returned.
5421 38. The dnslists ACL condition has been extended: it is now possible to supply
5422 a list of IP addresses and/or domains to be looked up in a particular DNS
5425 39. Added log_selector=+queue_time_overall.
5427 40. When running the queue in the test harness, wait just a tad after forking a
5428 delivery process, to get repeatability of debugging output.
5430 41. Include certificate and key file names in error message when GnuTLS fails
5431 to set them up, because the GnuTLS error message doesn't include the name
5432 of the failing file when there is a problem reading it.
5434 42. Allow both -bf and -bF in the same test run.
5436 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5438 44. The "Exiscan patch" is now merged into the mainline Exim source.
5440 45. Sometimes the final signoff response after QUIT could fail to get
5441 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5442 < 0 before doing a fflush(). This bug looks as though it goes back to the
5443 introduction of TLS in release 3.20, but "sometimes" must have been rare
5444 because the tests only now provoked it.
5446 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5447 (this can affect the format of dates).
5449 47. exim_tidydb, when checking for the continued existence of a message for
5450 which it has found a message-specific retry record, was not finding
5451 messages that were in split spool directories. Consequently, it was
5452 deleting retry records that should have stayed in existence.
5454 48. Steve fixed some bugs in eximstats.
5456 49. The SPA authentication driver was not abandoning authentication and moving
5457 on to the next authenticator when an expansion was forced to fail,
5458 contradicting the general specification for all authenticators. Instead it
5459 was generating a temporary error. It now behaves as specified.
5461 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5462 (the order specifies the preference for clients). The order is now AES256,
5463 AES128, 3DES, ARCFOUR128.
5465 51. Small patch to Sieve code - explicitly set From: when generating an
5468 52. Exim crashed if a remote delivery caused a very long error message to be
5469 recorded - for instance if somebody sent an entire SpamAssassin report back
5470 as a large number of 550 error lines. This bug was coincidentally fixed by
5471 increasing the size of one of Exim's internal buffers (big_buffer) that
5472 happened as part of the Exiscan merge. However, to be on the safe side, I
5473 have made the code more robust (and fixed the comments that describe what
5476 53. Now that there can be additional text after "Completed" in log lines (if
5477 the queue_time_overall log selector is set), a one-byte patch to exigrep
5478 was needed to allow it to recognize "Completed" as not the last thing in
5481 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5482 patch that reportedly fixes this has been added. I am not expert enough to
5483 create a test for it. This is what the patch creator wrote:
5485 "I found a little strange behaviour of ldap code when working with
5486 Windows 2003 AD Domain, where users was placed in more than one
5487 Organization Units. When I tried to give exim partial DN, the exit code
5488 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5489 But simultaneously result of request was absolutely normal ldap result,
5490 so I produce this patch..."
5492 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5493 REFERENCE, so I have modified the code to exclude the patch when that macro
5496 55. Some experimental protocols are using DNS PTR records for new purposes. The
5497 keys for these records are domain names, not reversed IP addresses. The
5498 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5499 leaves it alone. Component reversal etc. now happens only for IP addresses.
5502 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5504 57. Double the size of the debug message buffer (to 2048) so that more of very
5505 long debug lines gets shown.
5507 58. The exicyclog utility now does better if the number of log files to keep
5508 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5510 59. Two changes related to the smtp_active_hostname option:
5512 (1) $smtp_active_hostname is now available as a variable.
5513 (2) The default for smtp_banner uses $smtp_active_hostname instead
5514 of $primary_hostname.
5516 60. The host_aton() function is supposed to be passed a string that is known
5517 to be a valid IP address. However, in the case of IPv6 addresses, it was
5518 not checking this. This is a hostage to fortune. Exim now panics and dies
5519 if the condition is not met. A case was found where this could be provoked
5520 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5521 components; fortuitously, this particular loophole had already been fixed
5522 by change 4.50/55 above.
5524 If there are any other similar loopholes, the new check in host_aton()
5525 itself should stop them being exploited. The report I received stated that
5526 data on the command line could provoke the exploit when Exim was running as
5527 exim, but did not say which command line option was involved. All I could
5528 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5529 running as the user.
5532 61. There was a buffer overflow vulnerability in the SPA authentication code
5533 (which came originally from the Samba project). I have added a test to the
5534 spa_base64_to_bits() function which I hope fixes it.
5537 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5538 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5540 63. The daemon start-up calls getloadavg() while still root for those OS that
5541 need the first call to be done as root, but it missed one case: when
5542 deliver_queue_load_max is set with deliver_drop_privilege. This is
5543 necessary for the benefit of the queue runner, because there is no re-exec
5544 when deliver_drop_privilege is set.
5546 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5547 This has been fixed.
5549 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5550 was in use, was not putting the data itself into the right store pool;
5551 consequently, it could be overwritten for a subsequent message in the same
5552 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5555 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5557 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5558 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5559 the function were treating the return as a boolean value, which happened to
5560 work because 0=false and not-0=true, but is not correct code.
5562 68. The host_aton() function was not handling scoped IPv6 addresses (those
5563 with, for example, "%eth0" on the end) correctly.
5565 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5566 negated items (that is, ~something) in unsigned ints. Some compilers
5567 apparently mutter when there is no cast.
5569 70. If an address verification called from an ACL failed, and did not produce a
5570 user-specific message (i.e. there was only a "system" message), nothing was
5571 put in $acl_verify_message. In this situation, it now puts the system
5574 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5575 session; change 4.31/43 added the unwanted input to the log line - except
5576 that it did not do this in the start of session case. It now does.
5578 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5579 This is wrong and can cause the other end to generate a synchronization
5580 error if it is another Exim or anything else that does the synchronization
5581 check. A QUIT command is no longer sent after a timeout.
5583 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5584 during host lookups.
5586 74. The defer_ok option of callout verification was not working if it was used
5587 when verifying addresses in header lines, that is, for this case:
5589 verify = header_sender/callout=defer_ok
5591 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5592 those file descriptors could be used for SMTP connections. If anything
5593 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5594 could be sent to the SMTP client, causing chaos. The daemon now opens
5595 stdin, stdout, and stderr to /dev/null when it puts itself into the
5598 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5599 log by default. The user can override this with suitable Perl magic.
5601 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5602 the log message when discard triggers, was not working for the DATA ACL or
5603 for the non-SMTP ACL.
5605 78. Error message wording change in sieve.c.
5607 79. If smtp_accept_max_per_host was set, the number of connections could be
5608 restricted to fewer than expected, because the daemon was trying to set up
5609 a new connection before checking whether the processes handling previous
5610 connections had finished. The check for completed processes is now done
5611 earlier. On busy systems, this bug wouldn't be noticed because something
5612 else would have woken the daemon, and it would have reaped the completed
5615 80. If a message was submitted locally by a user whose login name contained one
5616 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5617 It caused a spool format error. I have fixed the spool reading code. A
5618 related problem was that the "from" clause in the Received: line became
5619 illegal because of the space(s). It is now covered by ${quote_local_part.
5621 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5624 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5626 83. Patch from Sieve maintainer to fix unterminated string problem in
5627 "vacation" handling.
5629 84. Some minor changes to the Linux configuration files to help with other
5630 OS variants using glibc.
5632 85. One more patch for Sieve to update vacation handling to latest spec.
5635 ----------------------------------------------------
5636 See the note above about the 4.44 and 4.50 releases.
5637 ----------------------------------------------------
5643 1. Change 4.43/35 introduced a bug that caused file counts to be
5644 incorrectly computed when quota_filecount was set in an appendfile
5647 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5648 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5651 3. Give more explanation in the error message when the command for a transport
5652 filter fails to execute.
5654 4. There are several places where Exim runs a non-Exim command in a
5655 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5656 was being done only for the command run by the queryprogram router. It is
5657 now done for all such subprocesses. The other cases are: ${run, transport
5658 filters, and the commands run by the lmtp and pipe transports.
5660 5. Some older OS have a limit of 256 on the maximum number of file
5661 descriptors. Exim was using setrlimit() to set 1000 as a large value
5662 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5663 systems. I've change it so that if it can't get 1000, it tries for 256.
5665 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5666 was an oversight, and furthermore, ever since the addition of extra
5667 controls (e.g. 4.43/32), the checks on when to allow different forms of
5668 "control" were broken. There should now be diagnostics for all cases when a
5669 control that does not make sense is encountered.
5671 7. $recipients is now available in the predata ACL (oversight).
5673 8. Tidy the search cache before the fork to do a delivery from a message
5674 received from the command line. Otherwise the child will trigger a lookup
5675 failure and thereby defer the delivery if it tries to use (for example) a
5676 cached ldap connection that the parent has called unbind on.
5678 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5679 of $address_data from the recipient verification was clobbered by the
5680 sender verification.
5682 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5683 was its contents. (It was OK if the option was not defined at all.)
5685 11. A "Completed" log line is now written for messages that are removed from
5686 the spool by the -Mrm option.
5688 12. $host_address is now set to the target address during the checking of
5689 ignore_target_hosts.
5691 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5692 being passed; this would have caused $sender_host_name to have been used if
5693 matching the list had actually called for a host name (not very likely,
5694 since this list is usually IP addresses). A host name is now passed as
5697 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5698 code that specifies a non-restarting handler (typically sigaction() in
5699 modern systems) in an attempt to fix a rare and obscure crash bug.
5701 15. Narrowed the window for a race in the daemon that could cause it to ignore
5702 SIGCHLD signals. This is not a major problem, because they are used only to
5703 wake it up if nothing else does.
5705 16. A malformed maildirsize file could cause Exim to calculate negative values
5706 for the mailbox size or file count. Odd effects could occur as a result.
5707 The maildirsize information is now recalculated if the size or filecount
5710 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5711 support for a long time. Removed HAVE_SYS_VFS_H.
5713 18. Updated exipick to current release from John Jetmore.
5715 19. Allow an empty sender to be matched against a lookup in an address list.
5716 Previously the only cases considered were a regular expression, or an
5719 20. Exim went into a mad DNS lookup loop when doing a callout where the
5720 host was specified on the transport, if the DNS lookup yielded more than
5723 21. The RFC2047 encoding function was originally intended for short strings
5724 such as real names; it was not keeping to the 75-character limit for
5725 encoded words that the RFC imposes. It now respects the limit, and
5726 generates multiple encoded words if necessary. To be on the safe side, I
5727 have increased the buffer size for the ${rfc2047: expansion operator from
5730 22. Failure to deliver a bounce message always caused it to be frozen, even if
5731 there was an errors_to setting on the router. The errors_to setting is now
5734 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5735 canonical form (fully expanded) before being placed in
5736 $sender_host_address.
5738 24. Updated eximstats to version 1.33
5740 25. Include certificate and key file names in error message when GnuTLS fails
5741 to set them up, because the GnuTLS error message doesn't include the name
5742 of the failing file when there is a problem reading it.
5744 26. Expand error message when OpenSSL has problems setting up cert/key files.
5747 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5748 (this can affect the format of dates).
5750 28. exim_tidydb, when checking for the continued existence of a message for
5751 which it has found a message-specific retry record, was not finding
5752 messages that were in split spool directories. Consequently, it was
5753 deleting retry records that should have stayed in existence.
5755 29. eximstats updated to version 1.35
5756 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5757 1.35 - bugfix such that pie charts by volume are generated correctly
5759 30. The SPA authentication driver was not abandoning authentication and moving
5760 on to the next authenticator when an expansion was forced to fail,
5761 contradicting the general specification for all authenticators. Instead it
5762 was generating a temporary error. It now behaves as specified.
5764 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5765 (the order specifies the preference for clients). The order is now AES256,
5766 AES128, 3DES, ARCFOUR128.
5768 31. Small patch to Sieve code - explicitly set From: when generating an
5771 32. Exim crashed if a remote delivery caused a very long error message to be
5772 recorded - for instance if somebody sent an entire SpamAssassin report back
5773 as a large number of 550 error lines. This bug was coincidentally fixed by
5774 increasing the size of one of Exim's internal buffers (big_buffer) that
5775 happened as part of the Exiscan merge. However, to be on the safe side, I
5776 have made the code more robust (and fixed the comments that describe what
5779 33. Some experimental protocols are using DNS PTR records for new purposes. The
5780 keys for these records are domain names, not reversed IP addresses. The
5781 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5782 leaves it alone. Component reversal etc. now happens only for IP addresses.
5785 34. The host_aton() function is supposed to be passed a string that is known
5786 to be a valid IP address. However, in the case of IPv6 addresses, it was
5787 not checking this. This is a hostage to fortune. Exim now panics and dies
5788 if the condition is not met. A case was found where this could be provoked
5789 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5790 components; fortuitously, this particular loophole had already been fixed
5791 by change 4.50/55 or 4.44/33 above.
5793 If there are any other similar loopholes, the new check in host_aton()
5794 itself should stop them being exploited. The report I received stated that
5795 data on the command line could provoke the exploit when Exim was running as
5796 exim, but did not say which command line option was involved. All I could
5797 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5798 running as the user.
5801 35. There was a buffer overflow vulnerability in the SPA authentication code
5802 (which came originally from the Samba project). I have added a test to the
5803 spa_base64_to_bits() function which I hope fixes it.
5806 36. The daemon start-up calls getloadavg() while still root for those OS that
5807 need the first call to be done as root, but it missed one case: when
5808 deliver_queue_load_max is set with deliver_drop_privilege. This is
5809 necessary for the benefit of the queue runner, because there is no re-exec
5810 when deliver_drop_privilege is set.
5812 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5813 was in use, was not putting the data itself into the right store pool;
5814 consequently, it could be overwritten for a subsequent message in the same
5815 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5818 38. Sometimes the final signoff response after QUIT could fail to get
5819 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5820 < 0 before doing a fflush(). This bug looks as though it goes back to the
5821 introduction of TLS in release 3.20, but "sometimes" must have been rare
5822 because the tests only now provoked it.
5828 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5829 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5830 Now it returns an integer. A number of calls were still expecting a T/F
5831 return. Fortuitously, in all cases, the tests worked in OK situations,
5832 which is the norm. However, things would have gone wrong on any write
5833 failures on the smtp file descriptor. This function is used when sending
5834 messages over SMTP and also when doing verify callouts.
5836 2. When Exim is called to do synchronous delivery of a locally submitted
5837 message (the -odf or -odi options), it no longer closes stderr before doing
5840 3. Implemented the mua_wrapper option.
5842 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5844 5. Implemented the functions header_remove(), header_testname(),
5845 header_add_at_position(), and receive_remove_recipient(), and exported them
5848 6. If an ACL "warn" statement specified the addition of headers, Exim already
5849 inserted X-ACL-Warn: at the start if there was no header name. However, it
5850 was not making this test for the second and subsequent header lines if
5851 there were newlines in the string. This meant that an invalid header could
5852 be inserted if Exim was badly configured.
5854 7. Allow an ACL "warn" statement to add header lines at the start or after all
5855 the Received: headers, as well as at the end.
5857 8. Added the rcpt_4xx retry error code.
5859 9. Added postmaster_mailfrom=xxx to callout verification option.
5861 10. Added mailfrom=xxxx to the callout verification option, for verify=
5864 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5865 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5867 12. Inserted some casts to stop certain compilers warning when using pointer
5868 differences as field lengths or precisions in printf-type calls (mostly
5869 affecting debugging statements).
5871 13. Added optional readline() support for -be (dynamically loaded).
5873 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5874 same clock tick as a message's arrival, so that its received time was the
5875 same as the "first fail" time on the retry record, and that message
5876 remained on the queue past the ultimate address timeout, every queue runner
5877 would try a delivery (because it was past the ultimate address timeout) but
5878 after another failure, the ultimate address timeout, which should have then
5879 bounced the address, did not kick in. This was a "< instead of <=" error;
5880 in most cases the first failure would have been in the next clock tick
5881 after the received time, and all would be well.
5883 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5884 being recognized when the domain list was tested by the match_domain
5885 condition in an expansion string.
5887 16. Added the ${str2b64: operator.
5889 17. Exim was always calling setrlimit() to set a large limit for the number of
5890 processes, without checking whether the existing limit was already
5891 adequate. (It did check for the limit on file descriptors.) Furthermore,
5892 errors from getrlimit() and setrlimit() were being ignored. Now they are
5893 logged to the main and panic logs, but Exim does carry on, to try to do its
5894 job under whatever limits there are.
5896 18. Imported PCRE 5.0.
5898 19. Trivial typo in log message " temporarily refused connection" (the leading
5901 20. If the log selector return_path_on_delivery was set and an address was
5902 redirected to /dev/null, the delivery process crashed because it assumed
5903 that a return path would always be set for a "successful" delivery. In this
5904 case, the whole delivery is bypassed as an optimization, and therefore no
5907 21. Internal re-arrangement: the function for sending a challenge and reading
5908 a response while authentication was assuming a zero-terminated challenge
5909 string. It's now changed to take a pointer and a length, to allow for
5910 binary data in such strings.
5912 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5914 23. Exim was not respecting finduser_retries when seeking the login of the
5915 uid under which it was called; it was always trying 10 times. (The default
5916 setting of finduser_retries is zero.) Also, it was sleeping after the final
5917 failure, which is pointless.
5919 24. Implemented tls_on_connect_ports.
5921 25. Implemented acl_smtp_predata.
5923 26. If the domain in control=submission is set empty, Exim assumes that the
5924 authenticated id is a complete email address when it generates From: or
5925 Sender: header lines.
5927 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5928 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5929 chown and chgrp in /bin and hostname in /usr/bin.
5931 28. Exim was keeping the "process log" file open after each use, just as it
5932 does for the main log. This opens the possibility of it remaining open for
5933 long periods when the USR1 signal hits a daemon. Occasional processlog
5934 errors were reported, that could have been caused by this. Anyway, it seems
5935 much more sensible not to leave this file open at all, so that is what now
5938 29. The long-running daemon process does not normally write to the log once it
5939 has entered its main loop, and it closes the log before doing so. This is
5940 so that log files can straightforwardly be renamed and moved. However,
5941 there are a couple of unusual error situations where the daemon does write
5942 log entries, and I had neglected to close the log afterwards.
5944 30. The text of an SMTP error response that was received during a remote
5945 delivery was being truncated at 512 bytes. This is too short for some of
5946 the long messages that one sometimes sees. I've increased the limit to
5949 31. It is now possible to make retry rules that apply only when a message has a
5950 specific sender, in particular, an empty sender.
5952 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5953 it possible to be selective about when SMTP synchronization is enforced.
5955 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5957 32. Implemented hosts_connection_nolog.
5959 33. Added an ACL for QUIT.
5961 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5964 35. Added mailbox_size and mailbox_filecount to appendfile.
5966 36. Added control = no_multiline_responses to ACLs.
5968 37. There was a bug in the logic of the code that waits for the clock to tick
5969 in the case where the clock went backwards by a substantial amount such
5970 that the microsecond fraction of "now" was more than the microsecond
5971 fraction of "then" (but the whole seconds number was less).
5973 38. Added support for the libradius Radius client library this is found on
5974 FreeBSD (previously only the radiusclient library was supported).
5980 1. When certain lookups returned multiple values in the form name=value, the
5981 quoting of the values was not always being done properly. Specifically:
5982 (a) If the value started with a double quote, but contained no whitespace,
5984 (b) If the value contained whitespace other than a space character (i.e.
5985 tabs or newlines or carriage returns) it was not quoted.
5986 This fix has been applied to the mysql and pgsql lookups by writing a
5987 separate quoting function and calling it from the lookup code. The fix
5988 should probably also be applied to nisplus, ibase and oracle lookups, but
5989 since I cannot test any of those, I have not disturbed their existing code.
5991 2. A hit in the callout cache for a specific address caused a log line with no
5992 reason for rejecting RCPT. Now it says "Previous (cached) callout
5993 verification failure".
5995 3. There was an off-by-one bug in the queryprogram router. An over-long
5996 return line was truncated at 256 instead of 255 characters, thereby
5997 overflowing its buffer with the terminating zero. As well as fixing this, I
5998 have increased the buffer size to 1024 (and made a note to document this).
6000 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6001 when Exim is waiting for an SMTP response from a remote server, Exim
6002 restarts its select() call on the socket, thereby resetting its timeout.
6003 This is not a problem when such interrupts are rare. Somebody set up a cron
6004 job to run exiwhat every 2 minutes, which is less than the normal select()
6005 timeout (5 or 10 minutes). This meant that the select() timeout never
6006 kicked in because it was always reset. I have fixed this by comparing the
6007 time when an interrupt arrives with the time at the start of the first call
6008 to select(). If more time than the timeout has elapsed, the interrupt is
6009 treated as a timeout.
6011 5. Some internal re-factoring in preparation for the addition of Sieve
6012 extensions (by MH). In particular, the "personal" test is moved to a
6013 separate function, and given an option for scanning Cc: and Bcc: (which is
6014 not set for Exim filters).
6016 6. When Exim created an email address using the login of the caller as the
6017 local part (e.g. when creating a From: or Sender: header line), it was not
6018 quoting the local part when it contained special characters such as @.
6020 7. Installed new OpenBSD configuration files.
6022 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6023 try to make them clearer.
6025 9. Callout options, other than the timeout value, were being ignored when
6026 verifying sender addresses in header lines. For example, when using
6028 verify = header_sender/callout=no_cache
6030 the cache was (incorrectly) being used.
6032 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6033 only the Cygwin environment.
6035 11. When return_path_on_delivery was set as a log selector, if different remote
6036 addresses in the same message used different return paths and parallel
6037 remote delivery occurred, the wrong values would sometimes be logged.
6038 (Whenever a remote delivery process finished, the return path value from
6039 the most recently started remote delivery process was logged.)
6041 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6042 lines when AUTH and/or TLS are in use. This is the "received protocol"
6043 field. Exim used to use "asmtp" for authenticated SMTP, without any
6044 indication (in the protocol name) for TLS use. Now it follows the RFC and
6045 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6046 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6047 names appear in log lines as well as in Received: header lines.
6049 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6050 extensions, and comparison tests, and to fix some bugs.
6052 14. Changes to the "personal" filter test:
6054 (1) The test was buggy in that it was just doing the equivalent of
6055 "contains" tests on header lines. For example, if a user's address was
6056 anne@some.where, the "personal" test would incorrectly be true for
6058 To: susanne@some.where
6060 This test is now done by extracting each address from the header in turn,
6061 and checking the entire address. Other tests that are part of "personal"
6062 are now done using regular expressions (for example, to check local parts
6063 of addresses in From: header lines).
6065 (2) The list of non-personal local parts in From: addresses has been
6066 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6067 taken from the Sieve specification recommendations.
6069 (3) If the message contains any header line starting with "List-" it is
6070 treated as non-personal.
6072 (4) The test for "circular" in the Subject: header line has been removed
6073 because it now seems ill-conceived.
6075 15. Minor typos in src/EDITME comments corrected.
6077 16. Installed latest exipick from John Jetmore.
6079 17. If headers_add on a router specified a text string that was too long for
6080 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6081 of string_sprintf() is now avoided.
6083 18. $message_body_size was not set (it was always zero) when running the DATA
6084 ACL and the local_scan() function.
6086 19. For the "mail" command in an Exim filter, no default was being set for
6087 the once_repeat time, causing a random time value to be used if "once" was
6088 specified. (If the value happened to be <= 0, no repeat happened.) The
6089 default is now 0s, meaning "never repeat". The "vacation" command was OK
6090 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6091 (I found it when inspecting the code).
6093 20. There is now an overall timeout for performing a callout verification. It
6094 defaults to 4 times the callout timeout, which applies to individual SMTP
6095 commands during the callout. The overall timeout applies when there is more
6096 than one host that can be tried. The timeout is checked before trying the
6097 next host. This prevents very long delays if there are a large number of
6098 hosts and all are timing out (e.g. when the network connections are timing
6099 out). The value of the overall timeout can be changed by specifying an
6100 additional sub-option for "callout", called "maxwait". For example:
6102 verify = sender/callout=5s,maxwait=20s
6104 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6105 to the end before writing, but this should make it even safer).
6107 22. Exim was forgetting that it had advertised PIPELINING for the second and
6108 subsequent messages on an SMTP connection. It was also not resetting its
6109 memory on STARTTLS and an internal HELO.
6111 23. When Exim logs an SMTP synchronization error within a session, it now
6112 records whether PIPELINING has been advertised or not.
6114 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6115 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6116 rather than long int.
6118 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6120 26. Added the never_mail option to autoreply.
6126 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6127 crash if the getsockname() call failed; this can happen if a connection is
6128 closed very soon after it is established. The problem was simply in the
6129 order in which certain operations were done, causing Exim to try to write
6130 to the SMTP stream before it had set up the file descriptor. The bug has
6131 been fixed by making things happen in the correct order.
6137 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6138 before the connection was closed, thus losing the rejection response.
6140 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6141 some early Solaris releases, but causes trouble in current releases where
6142 socklen_t is defined.
6144 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6147 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6150 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6151 that releasing the top of it at the end releases what was used for sub-
6152 expansions (unless the block got too big). However, discard this block if
6153 the first thing is a variable or header, so that we can use its block when
6154 it is dynamic (useful for very large $message_headers, for example).
6156 6. Lookups now cache *every* query, not just the most recent. A new, separate
6157 store pool is used for this. It can be recovered when all lookup caches are
6158 flushed. Lookups now release memory at the end of their result strings.
6159 This has involved some general refactoring of the lookup sources.
6161 7. Some code has been added to the store_xxx() functions to reduce the amount
6162 of flapping under certain conditions.
6164 8. log_incoming_interface used to affect only the <= reception log lines. Now
6165 it causes the local interface and port to be added to several more SMTP log
6166 lines, for example "SMTP connection from", and rejection lines.
6168 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6170 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6172 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6173 could be overwritten at the end of the current message (or the start of a
6174 new message if it was set in a HELO ACL). The value is now preserved for
6175 the duration of the SMTP connection.
6177 12. If a transport had a headers_rewrite setting, and a matching header line
6178 contained an unqualified address, that address was qualified, even if it
6179 did not match any rewriting rules. The underlying bug was that the values
6180 of the flags that permit the existence of unqualified sender and recipient
6181 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6182 non-local messages, and by -bnq for local messages) were not being
6183 preserved with the message after it was received.
6185 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6186 "next input=" as part of the text comprising the host identity instead of
6187 the correct text. The code was using the same buffer for two different
6188 strings. However, depending on which order the printing function evaluated
6189 its arguments, the bug did not always show up. Under Linux, for example, my
6190 test suite worked just fine.
6192 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6193 doesn't work with some older versions of Perl. It has been changed to "my",
6194 which in any case is probably the better facility to use.
6196 15. A really picky compiler found some instances of statements for creating
6197 error messages that either had too many or two few arguments for the format
6200 16. The size of the buffer for calls to the DNS resolver has been increased
6201 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6202 for addresses that have a lot of PTR records. This alleviates a problem; it
6203 does not fully solve it.
6205 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6206 buffer now truncates the list and logs the incident, which is the same
6207 action as happens when Exim is looking up a host name and its aliases.
6208 Previously in this situation something unpredictable would happen;
6209 sometimes it was "internal error: store_reset failed".
6211 18. If a server dropped the connection unexpectedly when an Exim client was
6212 using GnuTLS and trying to read a response, the client delivery process
6213 crashed while trying to generate an error log message.
6215 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6216 string, for example:
6218 warn message = H1: something\nH2: something
6220 the text was added as a single header line from Exim's point of view
6221 though it ended up OK in the delivered message. However, searching for the
6222 second and subsequent header lines using $h_h2: did not work. This has been
6223 fixed. Similarly, if a system filter added multiple headers in this way,
6224 the routers could not see them.
6226 20. Expanded the error message when iplsearch is called with an invalid key to
6227 suggest using net-iplsearch in a host list.
6229 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6230 ACLs are no longer actually imposed (and a message to that effect is
6233 22. If a "gecos" field in a passwd entry contained escaped characters, in
6234 particular, if it contained a \" sequence, Exim got it wrong when building
6235 a From: or a Sender: header from that name. A second bug also caused
6236 incorrect handling when an unquoted " was present following a character
6237 that needed quoting.
6239 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6240 was not being matched caselessly.
6242 24. Arranged for all hyphens in the exim.8 source to be escaped with
6245 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6246 properly. Recipient callout cache records were still being keyed to include
6247 the sender, even when use_sender was set false. This led to far more
6248 callouts that were necessary. The sender is no longer included in the key
6249 when use_sender is false.
6251 26. Added "control = submission" modifier to ACLs.
6253 27. Added the ${base62d: operator to decode base 62 numbers.
6255 28. dnsdb lookups can now access SRV records.
6257 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6258 the configuration file.
6260 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6261 (-v) mode. This makes the output for a verbose queue run more intelligible.
6263 31. Added a use_postmaster feature to recipient callouts.
6265 32. Added the $body_zerocount variable, containing the number of binary zero
6266 bytes in the message body.
6268 33. The time of last modification of the "new" subdirectory is now used as the
6269 "mailbox time last read" when there is a quota error for a maildir
6272 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6274 35. Added +ignore_unknown as a special item in host lists.
6276 36. Code for decoding IPv6 addresses in host lists is now included, even if
6277 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6278 address was recognized as an IP address, but was then not correctly decoded
6279 into binary, causing unexpected and incorrect effects when compared with
6286 1. Very minor rewording of debugging text in manualroute to say "list of
6287 hosts" instead of "hostlist".
6289 2. If verify=header_syntax was set, and a header line with an unqualified
6290 address (no domain) and a large number of spaces between the end of the
6291 name and the colon was received, the reception process suffered a buffer
6292 overflow, and (when I tested it) crashed. This was caused by some obsolete
6293 code that should have been removed. The fix is to remove it!
6295 3. When running in the test harness, delay a bit after writing a bounce
6296 message to get a bit more predictability in the log output.
6298 4. Added a call to search_tidyup() just before forking a reception process. In
6299 theory, someone could use a lookup in the expansion of smtp_accept_max_
6300 per_host which, without the tidyup, could leave open a database connection.
6302 5. Added the variables $recipient_data and $sender_data which get set from a
6303 lookup success in an ACL "recipients" or "senders" condition, or a router
6304 "senders" option, similar to $domain_data and $local_part_data.
6306 6. Moved the writing of debug_print from before to after the "senders" test
6309 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6310 problems for message scanning, either using a data ACL, or using
6311 local_scan() because the Received: header was not generated till after they
6312 were called (in order to set the time as the time of reception completion).
6313 I have revised the way this works. The header is now generated after the
6314 body is received, but before the ACL or local_scan() are called. After they
6315 are run, the timestamp in the header is updated.
6321 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6322 before starting a queue runner without re-exec. This happened only when
6323 deliver_drop_privilege was set or when the Exim user was set to root. The
6324 effect of the bug was that timeouts during subsequent deliveries caused
6325 crashes instead of being properly handled. The handler is now left at its
6326 default (and expected) setting.
6328 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6329 message, again when deliver_drop_privilege is set or Exim is run as root.
6330 The bug described in (1) was not present in this case, but the tidying up
6331 of the other signals was missing. I have made the two cases consistent.
6333 3. The ignore_target_hosts setting on a manualroute router was being ignored
6334 for hosts that were looked up using the /MX notation.
6336 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6339 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6340 operated on the sender address. After changing the $sender_address to <>
6341 for the sender address verify, Exim was re-instated it as the original
6342 (before rewriting) address, but remembering that it had rewritten it, so it
6343 wasn't rewriting it again. This bug also had the effect of breaking the
6344 sender address verification caching when the sender address was rewritten.
6346 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6347 This has been changed so that if the ip literal address matches
6348 ignore_target_hosts, the router declines.
6350 7. Added expansion conditions match_domain, match_address, and match_local_
6351 part (NOT match_host).
6353 8. The placeholder for the Received: header didn't have a length field set.
6355 9. Added code to Exim itself and to exim_lock to test for a specific race
6356 condition that could lead to file corruption when using MBX delivery. The
6357 issue is with the lockfile that is created in /tmp. If this file is removed
6358 after a process has opened it but before that process has acquired a lock,
6359 there is the potential for a second process to recreate the file and also
6360 acquire a lock. This could lead to two Exim processes writing to the file
6361 at the same time. The added code performs the same test as UW imapd; it
6362 checks after acquiring the lock that its file descriptor still refers to
6363 the same named file.
6365 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6366 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6369 11. Added the smtp_active_hostname option. If used, this will typically be made
6370 to depend on the incoming interface address. Because $interface_address is
6371 not set up until the daemon has forked a reception process, error responses
6372 that can happen earlier (such as "too many connections") no longer contain
6375 12. If an expansion in a condition on a "warn" statement fails because a lookup
6376 defers, the "warn" statement is abandoned, and the next ACL statement is
6377 processed. Previously this caused the whole ACL to be aborted.
6379 13. Added the iplsearch lookup type.
6381 14. Added ident_timeout as a log selector.
6383 15. Added tls_certificate_verified as a log selector.
6385 16. Added a global option tls_require_ciphers (compare the smtp transport
6386 option of the same name). This controls incoming TLS connections.
6388 17. I finally figured out how to make tls_require_ciphers do a similar thing
6389 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6390 before starting the TLS session.
6392 18. Tabs are now shown as \t in -bP output.
6394 19. If the log selector return_path_on_delivery was set, Exim crashed when
6395 bouncing a message because it had too many Received: header lines.
6397 20. If two routers both had headers_remove settings, and the first one included
6398 a superfluous trailing colon, the final name in the first list and the
6399 first name in the second list were incorrectly joined into one item (with a
6400 colon in the middle).
6406 1. Added -C and -D options to the exinext utility, mainly to make it easier
6407 to include in the automated testing, but these could be helpful when
6408 multiple configurations are in use.
6410 2. The exinext utility was not formatting the output nicely when there was
6411 an alternate port involved in the retry record key, nor when there was a
6412 message id as well (for retries that were specific to a specific message
6413 and a specific host). It was also confused by IPv6 addresses, because of
6414 the additional colons they contain. I have fixed the IPv4 problem, and
6415 patched it up to do a reasonable job for IPv6.
6417 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6418 delivery, the log line now contains "pipelined" if PIPELINING was used.
6420 4. An SMTP transport process used to panic and die if the bind() call to set
6421 an explicit outgoing interface failed. This has been changed; it is now
6422 treated in the same way as a connect() failure.
6424 5. A reference to $sender_host_name in the part of a conditional expansion
6425 that was being skipped was still causing a DNS lookup. This no longer
6428 6. The def: expansion condition was not recognizing references to header lines
6429 that used bh_ and bheader_.
6431 7. Added the _cache feature to named lists.
6433 8. The code for checking quota_filecount in the appendfile transport was
6434 allowing one more file than it should have been.
6436 9. For compatibility with Sendmail, the command line option
6444 and sets the incoming protocol and host name (for trusted callers). The
6445 host name and its colon can be omitted when only the protocol is to be set.
6446 Note the Exim already has two private options, -pd and -ps, that refer to
6447 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6448 "s", but I don't think that's a major issue.
6450 10. A number of refactoring changes to the code, none of which should affect
6453 (a) The number of logging options was getting close to filling up the
6454 32-bit word that was used as a bit map. I have split them into two classes:
6455 those that are passed in the argument to log_write(), and those that are
6456 only ever tested independently outside of that function. These are now in
6457 separate 32-bit words, so there is plenty of room for expansion again.
6458 There is no change in the user interface or the logging behaviour.
6460 (b) When building, for example, log lines, the code previously used a
6461 macro that called string_cat() twice, in order to add two strings. This is
6462 not really sufficiently general. Furthermore, there was one instance where
6463 it was actually wrong because one of the argument was used twice, and in
6464 one call a function was used. (As it happened, calling the function twice
6465 did not affect the overall behaviour.) The macro has been replaced by a
6466 function that can join an arbitrary number of extra strings onto a growing
6469 (c) The code for expansion conditions now uses a table and a binary chop
6470 instead of a serial search (which was left over from when there were very
6471 few conditions). Also, it now recognizes conditions like "pam" even when
6472 the relevant support is not compiled in: a suitably worded error message is
6473 given if an attempt is made to use such a condition.
6475 11. Added ${time_interval:xxxxx}.
6477 12. A bug was causing one of the ddress fields not to be passed back correctly
6478 from remote delivery subprocesses. The field in question was not being
6479 subsequently used, so this caused to problems in practice.
6481 13. Added new log selectors queue_time and deliver_time.
6483 14. Might have fixed a bug in maildirsizefile handling that threw up
6484 "unexpected character" debug warnings, and recalculated the data
6485 unnecessarily. In any case, I expanded the warning message to give more
6488 15. Added the message "Restricted characters in address" to the statements in
6489 the default ACL that block characters like @ and % in local parts.
6491 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6492 Three changes have been made:
6494 (a) There was a serious bug; a negative response to MAIL caused the whole
6495 recipient domain to be cached as invalid, thereby blocking all messages
6496 to all local parts at the same domain, from all senders. This bug has
6497 been fixed. The domain is no longer cached after a negative response to
6498 MAIL if the sender used is not empty.
6500 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6503 (c) A new callout option, "use_sender" has been added for people who want
6504 the modified behaviour.
6510 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6513 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6514 indeed breaks things for older releases.
6516 3. Added additional logging to the case where there is a problem reading data
6517 from a filter that is running in a subprocess using a pipe, in order to
6518 try to track down a specific problem.
6520 4. Testing facility fudge: when running in the test harness and attempting
6521 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6522 getting "No route to host". Convert this to a timeout.
6524 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6527 6. Some OS don't have socklen_t but use size_t instead. This affects the
6528 fifth argument of getsockopt() amongst other things. This is now
6529 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6530 can be set for individual OS. I have set it for SunOS5, OSF1, and
6531 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6532 some earlier ones do not.
6534 7. Change 4.30/15 was not doing the test caselessly.
6536 8. The standard form for an IPv6 address literal was being rejected by address
6537 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6538 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6539 this, as well as the form without the "IPv6" on the front (but only when
6540 address literals are enabled, of course).
6542 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6544 10. Exim crashed if a message with an empty sender address specified by -f
6545 encountered a router with an errors_to setting. This could be provoked only
6546 by a command such as
6550 where an empty string was supplied; "<>" did not hit this bug.
6552 11. Installed PCRE release 4.5.
6554 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6555 remained set. It is now erased.
6557 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6558 times from message ids (which are base 36 rather than the normal 62).
6560 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6561 were being counted as actual protocol errors, and logged if the log
6562 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6563 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6564 and DATA following a set of rejected RCPTs do not count as protocol errors.
6565 In other words, Exim assumes they were pipelined, though this may not
6566 actually be the case. Of course, in all cases the client gets an
6567 appropriate error code.
6569 15. If a lookup fails in an ACL condition, a message about the failure may
6570 be available; it is used if testing the ACL cannot continue, because most
6571 such messages specify what the cause of the deferral is. However, some
6572 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6573 that caused an old message to be retained and used if a later statement
6574 caused a defer, replacing the real cause of the deferral.
6576 16. If an IP address had so many PTR records that the DNS lookup buffer
6577 was not large enough to hold them, Exim could crash while trying to process
6578 the truncated data. It now detects and logs this case.
6580 17. Further to 4.21/58, another change has been made: if (and only if) the
6581 first line of a message (the first header line) ends with CRLF, a bare LF
6582 in a subsequent header line has a space inserted after it, so as not to
6583 terminate the header.
6585 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6586 unnecessarily, used atoi() instead of strtol(), and didn't check the
6587 termination when getting file sizes from file names by regex.
6589 19. Completely re-implemented the support for maildirsize files, in the light
6590 of a number of problems with the previous contributed implementation
6591 (4.30/29). In particular:
6593 . If the quota is zero, the maildirsize file is maintained, but no quota is
6596 . If the maildir directory does not exist, it is created before any attempt
6597 to write a maildirsize file.
6599 . The quota value in the file is just a cache; if the quota is changed in
6600 the transport, the new value overrides.
6602 . A regular expression is available for excluding directories from the
6605 20. The autoreply transport checks the characters in options that define the
6606 message's headers; it allows continued headers, but it was checking with
6607 isspace() after an embedded newline instead of explicitly looking for a
6610 21. If all the "regular" hosts to which an address was routed had passed their
6611 expiry times, and had not reached their retry times, the address was
6612 bounced, even if fallback hosts were defined. Now Exim should go on to try
6615 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6616 equivalent code in the SMTP transport. Some hosts send humungous responses
6617 to HELO/EHLO, more than 1024 it seems.
6619 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6620 gives compiler warnings in some environments. I've now done it "properly",
6623 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6624 (because of problems with the built-in one) was declared to return uschar *
6625 instead of char *, causing compiler failure.
6627 25. Fixed a file descriptor leak when processing alias/forward files.
6629 26. Fixed a minor format string issue in dbfn.c.
6631 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6633 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6634 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6637 29. When a sender address is verified, it is cached, to save repeating the test
6638 when there is more than one recipient in a message. However, when the
6639 verification involves a callout, it is possible for different callout
6640 options to be set for different recipients. It is too complicated to keep
6641 track of this in the cache, so now Exim always runs a verification when a
6642 callout is required, relying on the callout cache for the optimization.
6643 The overhead is duplication of the address routing, but this should not be
6646 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6647 to be verified with callout=postmaster, and the main callout worked but the
6648 postmaster check failed, the verification correctly failed. However, if a
6649 subsequent RCPT command asked for sender verification *without* the
6650 postmaster check, incorrect caching caused this verification also to fail,
6653 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6654 it was not caching the DNS options (qualify_single, search_parents) that
6655 were used when the lookup failed. A subsequent lookup with different
6656 options therefore always gave the same answer, though there were cases
6657 where it should not have. (Example: a "domains = !$mx_any" option on a
6658 dnslookup router: the "domains" option is always processed without any
6659 widening, but the router might have qualify_single set.) Now Exim uses the
6660 cached value only when the same options are set.
6662 32. Added John Jetmore's "exipick" utility to the distribution.
6664 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6665 than a timeout (e.g. a certificate is required, and is not provided), an
6666 Exim server now closes the connection immediately. Previously it waited for
6667 the client to close - but if the client is SSL, it seems that they each
6668 wait for each other, leading to a delay before one of them times out.
6670 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6671 maintained 0.8.x compatibility because I don't think many are using it, and
6672 it is clearly obsolete.
6674 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6677 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6678 client certificate was expired. A simple patch fixes this, though I don't
6679 understand the full logic of why the verify callback is called multiple
6682 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6683 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6684 which causes problems with some clients (such as the Certicom SSL Plus
6685 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6686 disables the coutermeasure allowing Eudora to connect."
6688 38. Exim was not checking that a write() to a log file succeeded. This could
6689 lead to Bad Things if a log got too big, in particular if it hit a file
6690 size limit. Exim now panics and dies if it cannot write to a log file, just
6691 as it does if it cannot open a log file.
6693 39. Modified OS/Makefile-Linux so that it now contains
6695 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6697 The two -D definitions ensure that Exim is compiled with large file
6698 support, which makes it possible to handle log files that are bigger than
6701 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6702 instance) a domain was checked against a named list that involved a lookup,
6703 causing $domain_data to be set, then another domain was checked against the
6704 same list, then the first domain was re-checked, the value of $domain_data
6705 after the final check could be wrong. In particular, if the second check
6706 failed, it could be set empty. This bug probably also applied to
6709 41. The strip_trailing_dot option was not being applied to the address given
6710 with the -f command-line option.
6712 42. The code for reading a message's header from the spool was incrementing
6713 $received_count, but never initializing it. This meant that the value was
6714 incorrect (doubled) while delivering a message in the same process in which
6715 it was received. In the most common configuration of Exim, this never
6716 happens - a fresh exec is done - but it can happen when
6717 deliver_drop_privilege is set.
6719 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6720 it now includes up to 150 characters of the unexpected data in the log
6723 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6724 and building data strings. The size of both of these buffers was 10 000
6725 bytes - far larger than anybody would *ever* want, thought I. Needless to
6726 say, somebody hit the limit. I have increased the maximum line length to
6727 20 000 and the maximum data length of concatenated lines to 100 000. I have
6728 also fixed two bugs, because there was no checking on these buffers. Tsk,
6729 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6730 buffer is too small.
6732 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6733 lsearch lookups. Now it does.
6735 46. When parsing a route_list item in a manualroute router, a fixed-length
6736 buffer was used for the list of hosts. I made this 1024 bytes long,
6737 thinking that nobody would ever have a list of hosts that long. Wrong.
6738 Somebody had a whole pile of complicated expansion conditions, and the
6739 string was silently truncated, leading to an expansion error. It turns out
6740 that it is easier to change to an unlimited length (owing to other changes
6741 that have happened since this code was originally written) than to build
6742 structure for giving a limitation error. The length of the item that
6743 expands into the list of hosts is now unlimited.
6745 47. The lsearch lookup could not handle data where the length of text line was
6746 more than 4095 characters. Such lines were truncated, leading to shortened
6747 data being returned. It should now handle lines of any length.
6749 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6750 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6753 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6754 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6755 no longer happens in comment lines. A list of replacements is now placed
6756 at the head of all of the source files, except those whose only change is
6757 to replace PERL_COMMAND in the very first #! line.
6759 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6760 messages on the queue, with a bottom-up merge sort, using code contributed
6761 by Michael Haardt. This should make operations like -bp somewhat faster on
6762 large queues. It won't affect queue runners, except when queue_run_in_order
6765 51. Installed eximstats 1.31 in the distribution.
6767 52. Added support for SRV lookups to the dnslookup router.
6769 53. If an ACL referred to $message_body or $message_body_end, the value was not
6770 reset for any messages that followed in the same SMTP session.
6772 54. The store-handling optimization for building very long strings was not
6773 differentiating between the different store pools. I don't think this
6774 actually made any difference in practice, but I've tidied it.
6776 55. While running the routers to verify a sender address, $sender_address
6777 was still set to the sender address. This is wrong, because when routing to
6778 send a bounce to the sender, it would be empty. Therefore, I have changed
6779 it so that, while verifying a sender address, $sender_address is set to <>.
6780 (There is no change to what happens when verifying a recipient address.)
6782 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6783 target A or AAAA records (if not already returned) without resetting the
6784 qualify_single or search_parents options of the DNS resolver. These are
6785 inappropriate in this case because the targets of MX and SRV records must
6786 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6787 target that, when qualified, matched something in the local domain. These
6788 two options are now turned off when doing these lookups.
6790 57. It seems that at least some releases of Reiserfs (which does not have the
6791 concept of a fixed number of inodes) returns zero and not -1 for the
6792 number of available inodes. This interacted badly with check_spool_inodes,
6793 which assumed that -1 was the "no such thing" setting. What I have done is
6794 to check that the total number of inodes is greater than zero before doing
6795 the test of how many are available.
6797 58. When a "warn" ACL statement has a log_message modifier, the message is
6798 remembered, and not repeated. This is to avoid a lot of repetition when a
6799 message has many recipients that cause the same warning to be written.
6800 However, Exim was preserving the list of already written lines for an
6801 entire SMTP session, which doesn't seem right. The memory is now reset if a
6802 new message is started.
6804 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6805 debugging output unless log_rewrite was also set.
6807 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6808 of (int)(handle) when we know that handle contains (void *)(-1).
6810 61. The Exim daemon panic-logs an error return when it closes the incoming
6811 connection. However "connection reset by peer" seems to be common, and
6812 isn't really an error worthy of noting specially, so that particular error
6815 62. When Exim is trying to find all the local interfaces, it used to panic and
6816 die if the ioctl to get the interface flags failed. However, it seems that
6817 on at least one OS (Solaris 9) it is possible to have an interface that is
6818 included in the list of interfaces, but for which you get a failure error
6819 for this call. This happens when the interface is not "plumbed" into a
6820 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6821 failure of the "get flags" call assumes that the interface is down.
6823 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6824 makes life easier for people who are doing arithmetic on fields extracted
6825 from dates, where you often get leading zeros that should not be
6826 interpreted as octal.
6828 64. Added qualify_domain to the redirect router, to override the global
6831 65. If a pathologically long header line contained very many addresses (the
6832 report of this problem mentioned 10 000) and each of them was rewritten,
6833 Exim could use up a very large amount of memory. (It kept on making new
6834 copies of the header line as it rewrote, and never released the old ones.)
6835 At the expense of a bit more processing, the header rewriting function has
6836 been changed so that it no longer eats memory in this way.
6838 66. The generation of the Received: header has been moved from the time that a
6839 message starts to be received, to the time that it finishes. The timestamp
6840 in the Received: header should now be very close to that of the <= log
6841 line. There are two side-effects of this change:
6843 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6844 logged header lines no longer include the local Received: line, because
6845 it has not yet been created. The same applies to a copy of the message
6846 that is returned to a non-SMTP sender when a message is rejected.
6848 (b) When a filter file is tested using -bf, no additional Received: header
6849 is added to the test message. After some thought, I decided that this
6852 This change does not affect the value of $received_for. It is still set
6853 after address rewriting, but before local_scan() is called.
6855 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6857 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6858 gave an unhelpful panic error message, and a defer error. I have managed to
6859 change this behaviour so that it now rejects any supplied certificate,
6860 which seems right, as the list of acceptable certificates is empty.
6862 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6863 gave an unhelpful defer error. I have not managed to make this reject any
6864 supplied certificates, but the error message it gives is "no certificate
6865 supplied", which is not helpful.
6867 70. exigrep's output now also includes lines that are not associated with any
6868 message, but which match the given pattern. Implemented by a patch from
6869 Martin Sluka, which also tidied up the Perl a bit.
6871 71. Recipient callout verification, like sender verification, was using <> in
6872 the MAIL FROM command. This isn't really the right thing, since the actual
6873 sender may affect whether the remote host accepts the recipient or not. I
6874 have changed it to use the actual sender in the callout; this means that
6875 the cache record is now keyed on a recipient/sender pair, not just the
6876 recipient address. There doesn't seem to be a real danger of callout loops,
6877 since a callout by the remote host to check the sender would use <>.
6878 [SEE ABOVE: changed after hitting problems.]
6880 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6881 temporary errors. However, in the case of such a code being given after
6882 the end of a data transmission (i.e. after ".") Exim was failing to write
6883 a retry record for the message. (Yes, there was some broken host that was
6884 actually sending 8xx at this point.)
6886 73. An unknown lookup type in a host list could cause Exim to panic-die when
6887 the list was checked. (An example that provoked this was putting <; in the
6888 middle of a list instead of at the start.) If this happened during a DATA
6889 ACL check, a -D file could be left lying around. This kind of configuration
6890 error no longer causes Exim to die; instead it causes a defer error. The
6891 incident is still logged to the main and panic logs.
6893 74. Buglet left over from Exim 3 conversion. The message "too many messages
6894 in one connection" was written to the rejectlog but not the mainlog, except
6895 when address rewriting (yes!) was being logged.
6897 75. Added write_rejectlog option.
6899 76. When a system filter was run not as root (that is, when system_filter_user
6900 was set), the values of the $n variables were not being returned to the
6901 main process; thus, they were not subsequently available in the $sn
6904 77. Added +return_path_on_delivery log selector.
6906 78. A connection timeout was being treated differently from recipients deferred
6907 when testing hosts_max_try with a message that was older than the host's
6908 retry timeout. (The host should not be counted, thus allowing all hosts to
6909 be tried at least once before bouncing.) This may have been the cause of an
6910 occasionally reported bug whereby a message would remain on the queue
6911 longer than the retry timeout, but would be bounced if a delivery was
6912 forced. I say "may" because I never totally pinned down the problem;
6913 setting up timeout/retry tests is difficult. See also the next item.
6915 79. The ultimate address timeout was not being applied to errors that involved
6916 a combination of host plus message (for example, a timeout on a MAIL
6917 command). When an address resolved to a number of possible hosts, and they
6918 were not all tried for each delivery (e.g. because of hosts_max_try), a
6919 message could remain on the queue longer than the retry timeout.
6921 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6924 81. Fixed an obscure SMTP outgoing bug which required at least the following
6925 conditions: (a) there was another message waiting for the same server;
6926 (b) the server returned 5xx to all RCPT commands in the first message so
6927 that the message was not completed; (c) the server dropped the connection
6928 or gave a negative response to the RSET that Exim sends to abort the
6929 transaction. The observed case was a dropped connection after DATA that had
6930 been sent in pipelining mode. That is, the server had advertised PIPELINING
6931 but was not implementing it correctly. The effect of the bug was incorrect
6932 behaviour, such as trying another host, and this could lead to a crash.
6938 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6939 and daemon.c were passed as pointers to ints; they should have been
6940 pointers to socklen_t variables (which are typically unsigned ints).
6942 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6945 3. Fixed a really odd bug that affected only the testing scheme; patching a
6946 certain fixed string in the binary changed the value of another string that
6947 happened to be identical to the end of the original first string.
6949 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6950 name", it returns that address as the IP address. On some operating
6951 systems (e.g. Solaris), it also passes back the IP address string as the
6952 "host name". However, on others (e.g. Linux), it passes back an empty
6953 string. Exim wasn't checking for this, and was changing the host name to an
6954 empty string, assuming it had been canonicalized.
6956 5. Although rare, it is permitted to have more than one PTR record for a given
6957 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6958 all the names associated with an address, because they do in Solaris.
6959 However, it seems that they do not in Linux for data that comes from the
6960 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6961 I found this out when I moved to a new Linux workstation and tried to run
6962 the Exim test suite.
6964 To get round this problem I have changed the code so that it now does its
6965 own call to the DNS to look up PTR records when searching for a host name.
6966 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6967 addresses that are only in /etc/hosts are still found.
6969 This behaviour is, however, controlled by an option called host_lookup_
6970 order, which defaults to "bydns:byaddr". If people want to use the other
6971 order, or indeed, just use one or the other means of lookup, they can
6972 specify it in this variable.
6974 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6975 some operating systems, this comes back from gethostbyaddr() as an empty
6976 string, and this is what Exim used to test for. However, it seems that in
6977 other systems, "." is yielded. Exim now tests for this case too.
6979 7. The values of check_spool_space and check_log_space are now held internally
6980 as a number of kilobytes instead of an absolute number of bytes. If a
6981 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6982 kilobyte. This means that much larger values can be stored.
6984 8. Exim monitor: an attempt to get the action menu when not actually pointing
6985 at a message produces an empty menu entitled "No message selected". This
6986 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6987 no entries in it ("Shell widget menu has zero width and/or height"). So I
6988 have added a single, blank menu entry in this case.
6990 9. Added ${quote_local_part.
6992 10. MIME decoding is now applied to the contents of Subject: header lines when
6995 11. Now that a reference to $sender_host_address automatically causes a reverse
6996 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6997 host lookup before query-style lookups in lists that might use this
6998 variable. This has therefore been abolished, and the "net-" prefix is no
6999 longer necessary for query-style lookups.
7001 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7002 have been a typo for LFLAGS, so it has been changed.
7004 13. The install script calls Exim with "-C /dev/null" in order to find the
7005 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7006 to be output. However, since Exim outputs its version number before the
7007 error, it didn't break the script. It just looked ugly. I fixed this by
7008 always allowing "-C /dev/null" if the caller is root.
7010 14. Ignore overlarge ACL variable number when reading spool file - insurance
7011 against a later release with more variables having written the file.
7013 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7014 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7015 this, as well as the form without the "IPv6" on the front.
7017 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7018 OS/Makefile-Darwin file.
7020 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7021 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7023 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7024 variable. However, some OS use ints for inodes. I've added cast to long int
7025 to get rid of the compiler warning.
7027 19. I had forgotten to lock out "/../" in configuration file names when
7028 ALT_CONFIG_PREFIX was set.
7030 20. Routers used for verification do not need to specify transports. However,
7031 if such a router generated a host list, and callout was configured, Exim
7032 crashed, because it could not find a port number from the (non-existent)
7033 transport. It now assumes port 25 in this circumstance.
7035 21. Added the -t option to exigrep.
7037 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7038 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7039 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7040 them is set, LOOKUP_LSEARCH is forced.
7042 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7044 24. Added sender and host information to the "rejected by local_scan()" log
7045 line; previously there was no indication of these.
7047 25. Added .include_if_exists.
7049 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7050 Linux. It turns out that not all file systems support this. Apparently some
7051 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7052 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7053 not supported on the file descriptor, is now ignored when Exim is trying to
7054 sync a directory. This applies only to Linux.
7056 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7058 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7059 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7062 29. Added support for maildirsize files from supplied patch (modified a bit).
7064 30. The use of :fail: followed by an empty string could lead Exim to respond to
7065 sender verification failures with (e.g.):
7067 550 Verification failed for <xxx>
7068 550 Sender verify failed
7070 where the first response line was missing the '-' that indicates it is not
7071 the final line of the response.
7073 31. The loop for finding the name of the user that called Exim had a hardwired
7074 limit of 10; it now uses the value of finduser_retries, which is used for
7075 all other user lookups.
7077 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7080 33. Exim was neglecting to zero errno before one call of strtol() when
7081 expanding a string and expecting an integer value. On some systems this
7082 resulted in spurious "integer overflow" errors. Also, it was casting the
7083 result into an int without checking.
7085 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7086 did not work. The code looks as if it has *never* worked, though it appears
7087 to have been documented since at least release 1.62. I have made it work.
7089 35. The "timeout_DNS" error in retry rules, also documented since at least
7090 1.62, also never worked. As it isn't clear exactly what this means, and
7091 clearly it isn't a major issue, I have abolished the feature by treating it
7092 as "timeout", and writing a warning to the main and panic logs.
7094 36. The display of retry rules for -brt wasn't always showing the error code
7097 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7098 timeout_connect_A, timeout_connect_MX.
7100 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7101 to the empty sender.
7103 39. The daemon was not analysing the content of -oX till after it had closed
7104 stderr and disconnected from the controlling terminal. This meant that any
7105 syntax errors were only noted on the panic log, and the return code from
7106 the command was 0. By re-arranging the code a little, I've made the
7107 decoding happen first, so such errors now appear on stderr, and the return
7108 code is 1. However, the actual setting up of the sockets still happens in
7109 the disconnected process, so errors there are still only recorded on the
7112 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7113 connections (as happens on some IP stacks) was logged at start up time as
7114 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7115 it from "IPv6 and IPv4", which means that two separate sockets are being
7118 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7119 says whether AF_INET or AF_INET6 was passed as an argument.
7121 42. Exiwhat output was messed up when time zones were included in log
7124 43. Exiwhat now gives more information about the daemon's listening ports,
7125 and whether -tls-on-connect was used.
7127 44. The "port" option of the smtp transport is now expanded.
7129 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7130 silently ignored. Now an error message is written to the main and panic
7133 46. There's a new ACL modifier called "logwrite" which writes to a log file
7134 as soon as it is encountered.
7136 47. Added $local_user_uid and $local_user_gid at routing time.
7138 48. Exim crashed when trying to verify a sender address that was being
7141 49. Exim was recognizing only a space character after ".include". It now also
7142 recognizes a tab character.
7144 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7145 extracting the relevant information from the specification. The man page no
7146 longer contains scrambled data for the -d option, and I've added a section
7147 at the front about calling Exim under different names.
7149 51. Added "extra_headers" argument to the "mail" command in filter files.
7151 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7154 53. Installed eximstats 1.29.
7156 54. Added transport_filter_timeout as a generic transport option.
7158 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7159 Cc: header lines. This was required by RFC 822, but it not required by RFC
7162 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7163 incoming messages that did not have them. Now it does so only if the
7164 message originates locally, that is, if there is no associated remote host
7165 address. When Resent- header lines are present, this applies to the Resent-
7166 lines rather than the non-Resent- lines.
7168 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7169 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7171 58. Messages for configuration errors now include the name of the main
7172 configuration file - useful now that there may be more than one file in a
7173 list (.included file names were always shown).
7175 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7176 for those rare installations that do not start the daemon as root or run it
7177 setuid root. I've cut out the call to initgroups() if the daemon is not
7180 60. The Exim user and group can now be bound into the binary as text strings
7181 that are looked up at the start of Exim's processing.
7183 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7185 62. Added $mailstore_basename variable.
7187 63. Installed patch to sieve.c from Michael Haardt.
7189 64. When Exim failed to open the panic log after failing to open the main log,
7190 the original message it was trying to log was written to stderr and debug
7191 output, but if they were not available (the usual case in production), it
7192 was lost. Now it is written to syslog before the two lines that record the
7193 failures to open the logs.
7195 65. Users' Exim filters run in subprocesses under the user's uid. It is
7196 possible for a "deliver" command or an alias in a "personal" command to
7197 provoke an address rewrite. If logging of address rewriting is configured,
7198 this fails because the process is not running as root or exim. There may be
7199 a better way of dealing with this, but for the moment (because 4.30 needs
7200 to be released), I have disabled address rewrite logging when running a
7201 filter in a non-root, non-exim process.
7207 1. The buildconfig auxiliary program wasn't quoting the value set for
7208 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7209 not defined. This bug was masked in 4.22 by the effect that was fixed in
7212 2. Some messages that were rejected after a message id was allocated were
7213 shown as "incomplete" by exigrep. It no longer does this for messages that
7214 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7216 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7217 have allow_domain_literals set, the ID did not get logged in the <= line.
7218 Domain literals are now always recognized in Message-ID: header lines.
7220 4. The first argument for a ${extract expansion item is the key name or field
7221 number. Leading and trailing spaces in this item were not being ignored,
7222 causing some misleading effects.
7224 5. When deliver_drop_privilege was set, single queue runner processes started
7225 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7226 same command in the process it spins off) were not dropping privilege.
7228 6. When the daemon running as "exim" started a queue runner, it always
7229 re-executed Exim in the spun-off process. This is a waste of effort when
7230 deliver_drop_privilege is set. The new process now just calls the
7231 queue-runner function directly.
7237 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7240 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7241 ignored. Though the use of -oP was forcing the writing of a pid file, it
7242 was always written to the default place.
7244 3. If the message "no IP address found for host xxxx" is generated during
7245 incoming verification, it is now followed by identification of the incoming
7246 connection (so you can more easily find what provoked it).
7248 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7250 5. Added some features to "harden" Exim a bit more against certain attacks:
7252 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7253 be put in Local/Makefile. This is like the never_users runtime option,
7254 but it cannot be overridden. The default setting is "root".
7256 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7257 prefix string with which any file named in a -C command line option
7260 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7261 is retained for -C and -D only if the caller of Exim is root. Without
7262 it, the exim user may also use -C and -D and retain privilege.
7264 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7265 command line option is disabled.
7267 6. Macro names set by the -D option must start with an upper case letter, just
7268 like macro names defined in the configuration file.
7270 7. Added "dereference=" facility to LDAP.
7272 8. Two instances of the typo "uknown" in the source files are fixed.
7274 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7275 the Configure-Makefile script screwed up while processing it.
7277 10. Incorporated PCRE 4.4.
7279 11. The SMTP synchronization check was not operating right at the start of an
7280 SMTP session. For example, it could not catch a HELO sent before the client
7281 waited for the greeting. There is now a check for outstanding input at the
7282 point when the greeting is written. Because of the duplex, asynchronous
7283 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7284 way, but not yet received, when the check is performed.
7286 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7287 on TCP/IP sockets, because this apparently causes some broken clients to
7290 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7291 unchanged) from the Cygwin maintainer.
7293 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7294 was supported instead of testing for mbx. Effectively a typo.
7296 15. The spa authenticator server code was not checking that the input it
7297 received was valid base64.
7299 16. The debug output line for the "set" modifier in ACLs was not showing the
7300 name of the variable that was being set.
7302 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7304 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7305 lookup on its own. Something else was needed to trigger the lookup. For
7306 example, a match in host_lookup or the need for a host name in a host list.
7307 Now, if $sender_host_name is referenced and the host name has not yet been
7308 looked up, a lookup is performed. If the lookup fails, the variable remains
7309 empty, and $host_lookup_failed is set to "1".
7311 19. Added "eqi" as a case-independent comparison operator.
7313 20. The saslauthd authentication condition could segfault if neither service
7314 nor realm was specified.
7316 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7317 error message that was logged was misleading, and incoming SMTP
7318 connections were dropped. The message is now more accurate, and temporary
7319 errors are given to SMTP connections.
7321 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7322 (except RSET) with a 421 error, until QUIT is received. However, it was
7323 failing to send a response to QUIT.
7325 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7326 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7327 ACL is now run after the helo_try_verify_hosts code.
7329 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7330 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7331 case-independent, so other case variants are also recognized). Apparently
7332 some systems use these upper case variants.
7334 25. If more than two messages were waiting for the same host, and a transport
7335 filter was specified for the transport, Exim sent two messages over the
7336 same TCP/IP connection, and then failed with "socket operation on non-
7337 socket" when it tried to send the third.
7339 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7341 27. The extern definition of crypt16() in expand.c was not being excluded when
7342 the OS had its own crypt16() function.
7344 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7345 as a preferred synonym for return_size_limit, both as an option and as an
7348 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7350 30. Changed the default configuration ACL to relax the local part checking rule
7351 for addresses that are not in any local domains. For these addresses,
7352 slashes and pipe symbols are allowed within local parts, but the sequence
7353 /../ is explicitly forbidden.
7355 31. SPA server authentication was not clearing the challenge buffer before
7358 32. log_message in a "warn" ACL statement was writing to the reject log as
7359 well as to the main log, which contradicts the documentation and doesn't
7360 seem right (because no rejection is happening). So I have stopped it.
7362 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7363 However, I am unable to do any testing of this.
7365 34. Fixed an infelicity in the appendfile transport. When checking directories
7366 for a mailbox, to see if any needed to be created, it was accidentally
7367 using path names with one or more superfluous leading slashes; tracing
7368 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7370 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7371 contents are added to the log line that is written for every discarded
7372 recipient. (Previously a log_message setting was ignored.)
7374 36. The ${quote: operator now quotes the string if it is empty.
7376 37. The install script runs exim in order to find its version number. If for
7377 some reason other than non-existence or emptiness, which it checks, it
7378 could not run './exim', it was installing it with an empty version number,
7379 i.e. as "exim-". This error state is now caught, and the installation is
7382 38. An argument was missing from the function that creates an error message
7383 when Exim fails to connect to the socket for saslauthd authentication.
7384 This could cause Exim to crash, or give a corrupted message.
7386 39. Added isip, isip4, and isip6 to ${if conditions.
7388 40. The ACL variables $acl_xx are now saved with the message, and can be
7389 accessed later in routers, transports, and filters.
7391 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7392 strings in the file are not string-expanded.
7394 42. If a MAIL command specified a SIZE value that was too large to fit into an
7395 int variable, the check against message_size_limit failed. Such values are
7396 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7397 day this will have to be increased, but I don't think I want to be around
7398 when emails are that large.
7405 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7406 iconv() is not standard in FreeBSD.
7408 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7409 IPv6 enabled. The observed symptom was a segmentation fault on return from
7410 the function os_common_find_running_interfaces() in src/os.c.
7412 3. In the check_special_case() function in daemon.c I had used "errno" as an
7413 argument name, which causes warnings on some systems. This was basically a
7414 typo, since it was named "eno" in the comments!
7416 4. The code that waits for the clock to tick (at a resolution of some fraction
7417 of a second) so as to ensure message-id uniqueness was always waiting for
7418 at least one whole tick, when it could have waited for less. [This is
7419 almost certainly not relevant at current processor speeds, where it is
7420 unlikely to ever wait at all. But we try to future-proof.]
7422 5. The function that sleeps for a time interval that includes fractions of a
7423 second contained a race. It did not block SIGALRM between setting the
7424 timer, and suspending (a couple of lines later). If the interval was short
7425 and the sigsuspend() was delayed until after it had expired, the suspension
7426 never ended. On busy systems this could lead to processes getting stuck for
7429 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7430 process, before it forks any delivery processes. The open lookup caching
7431 mechanism meant that the open file or database connection was passed into
7432 the delivery process. The problem was that delivery processes always tidy
7433 up cached lookup data. This could cause a problem for the next delivery
7434 process started by the queue runner, because the external queue runner
7435 process does not know about the closure. So the next delivery process
7436 still has data in the lookup cache. In the case of a file lookup, there was
7437 no problem because closing a file descriptor in a subprocess doesn't affect
7438 the parent. However, if the lookup was caching a connection to a database,
7439 the connection was closed, and the second delivery process was likely to
7440 see errors such as "PGSQL: query failed: server closed the connection
7441 unexpectedly". The problem has been fixed by closing all cached lookups
7442 in a queue runner before running a delivery process.
7444 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7445 seem to have the "const" qualifier which it has on other OS. I've
7448 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7449 *of the same type* (client or server) with the same public name that an
7450 error should be diagnosed.
7452 9. When Exim looked up a host name for an IP address, but failed to find the
7453 original IP address when looking up the host name (a safety check), it
7454 output the message "<ip address> does not match any IP for NULL", which was
7455 confusing, to say the least. The bug was that the host name should have
7456 appeared instead of "NULL".
7458 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7459 user that is built into the binary, and the -C or -D options is used, root
7460 privilege is dropped before the configuration file is read. In addition,
7461 logging is switched to stderr instead of the normal log files. If the
7462 configuration then re-defines the Exim user, the unprivileged environment
7463 is probably not what is expected, so Exim logs a panic warning message (but
7466 However, if deliver_drop_privilege is set, the unprivileged state may well
7467 be exactly what is intended, so the warning has been cut out in that case,
7468 and Exim is allowed to try to write to its normal log files.
7474 1. smtp_return_error_details was not giving details for temporary sender
7475 or receiver verification errors.
7477 2. Diagnose a configuration error if two authenticators have the same public
7480 3. Exim used not to create the message log file for a message until the first
7481 delivery attempt. This could be confusing when incoming messages were held
7482 for policy or load reasons. The message log file is now created at the time
7483 the message is received, and an initial "Received" line is written to it.
7485 4. The automatically generated man page for command line options had a minor
7486 bug that caused no ill effects; however, a more serious problem was that
7487 the procedure for building the man page automatically didn't always
7488 operate. Consequently, release 4.20 contains an out-of-date version. This
7489 shouldn't happen again.
7491 5. When building Exim with embedded Perl support, the script that builds the
7492 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7493 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7495 6. The freeze_tell option was not being used for messages that were frozen on
7496 arrival, either by an ACL or by local_scan().
7498 7. Added the smtp_incomplete_transaction log selector.
7500 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7501 was accepting AUTH without a new EHLO.
7503 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7504 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7507 10. Logging of TCP/IP connections (when configured) now happens in the main
7508 daemon process instead of the child process, so that the TCP/IP connection
7509 count is more accurate (but it can never be perfect).
7511 11. The use of "drop" in a nested ACL was not being handled correctly in the
7512 outer ACL. Now, if condition failure induced by the nested "drop" causes
7513 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7514 or "require"), the connection is dropped.
7516 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7517 that yield "discard" can now be used with an "accept" or a "discard" verb,
7518 but an error is generated for any others (because I can't see a useful way
7519 to define what should happen).
7521 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7522 are now processed in the same way as lines in the Exim configuration file.
7523 In particular, continuation lines are supported.
7525 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7527 15. Added -ti meaning -t -i.
7529 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7530 domains, and warn by logging if others are found.
7532 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7533 returned from GIFCONF when Exim is trying to find the list of interfaces on
7534 a host. The code in os.c has been modified to copy each ifreq to an aligned
7535 structure in all cases.
7537 Also, in some cases, the returned ifreq's were being copied to a 'struct
7538 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7539 means the last couple of bytes of an IPv6 address could be chopped if the
7540 ifreq contained only a normal sockaddr (14 bytes storage).
7542 18. Named domain lists were not supported in the hosts_treat_as_local option.
7543 An entry such as +xxxx was not recognized, and was treated as a literal
7546 19. Ensure that header lines added by a DATA ACL are included in the reject log
7547 if the ACL subsequently rejects the message.
7549 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7550 MD5 (which is deprecated).
7552 21. When testing a filter file using -bf, Exim was writing a message when it
7553 took the sender from a "From " line in the message, but it was not doing so
7554 when it took $return_path from a Return-Path: header line. It now does.
7556 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7557 with a valid header line field name (a series of printing characters
7558 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7560 23. Changed "disc" in the source to "disk" to conform to the documentation and
7561 the book and for uniformity.
7563 24. Ignore Sendmail's -Ooption=value command line item.
7565 25. When execve() failed while trying to run a command in a pipe transport,
7566 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7567 could be confused with a return value of 69 from the command itself. This
7568 has been changed to 127, the value the shell returns if it is asked to run
7569 a non-existent command. The wording for the related log line suggests a
7570 non-existent command as the problem.
7572 26. If received_header_text expands to an empty string, do not add a Received:
7573 header line to the message. (Well, it adds a token one on the spool, but
7574 marks it "old" so that it doesn't get used or transmitted.)
7576 27. Installed eximstats 1.28 (addition of -nt option).
7578 28. There was no check for failure on the call to getsockname() in the daemon
7579 code. This can fail if there is a shortage of resources on the system, with
7580 ENOMEM, for example. A temporary error is now given on failure.
7582 29. Contrary to the C standard, it seems that in some environments, the
7583 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7584 program. Exim now does this explicitly; it affects the formatting of
7585 timestamps using strftime().
7587 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7588 complaints. I've now initialized all the variables, to avoid this.
7590 32. Header lines added by a system filter were not being "seen" during
7591 transport-time rewrites.
7593 33. The info_callback() function passed to OpenSSL is set up with type void
7594 (*)(SSL *, int, int), as described somewhere. However, when calling the
7595 function (actually a macro) that sets it up, the type void(*)() is
7596 expected. I've put in a cast to prevent warnings from picky compilers.
7598 34. If a DNS black list lookup found a CNAME record, but there were no A
7599 records associated with the domain it pointed at, Exim crashed.
7601 35. If a DNS black list lookup returned more than one A record, Exim ignored
7602 all but the first. It now scans all returned addresses if a particular IP
7603 value is being sought. In this situation, the contents of the
7604 $dnslist_value variable are a list of all the addresses, separated by a
7607 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7608 to accept a host name and all its aliases if the forward lookup for any of
7609 them yielded the IP address of the incoming connection. Now it accepts only
7610 those names whose forward lookup yields the correct IP address. Any other
7611 names are discarded. This closes a loophole whereby a rogue DNS
7612 administrator could create reverse DNS records to break through a
7613 wildcarded host restriction in an ACL.
7615 37. If a user filter or a system filter that ran in a subprocess used any of
7616 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7617 the wrong values were passed to the pipe command ($thisaddress had the
7618 value of $0, $0 had the value of $1, etc). This bug was introduced by
7619 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7621 38. Improved the line breaking for long SMTP error messages from ACLs.
7622 Previously, if there was no break point between 40 and 75 characters, Exim
7623 left the rest of the message alone. Two changes have been made: (a) I've
7624 reduced the minimum length to 35 characters; (b) if it can't find a break
7625 point between 35 and 75 characters, it looks ahead and uses the first one
7626 that it finds. This may give the occasional overlong line, but at least the
7627 remaining text gets split now.
7629 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7630 file descriptors might be low, and that setting 1000 would always raise it.
7631 It turns out that in some environments, the limit is already over 1000 and
7632 that lowering it causes trouble. So now Exim takes care not to decrease it.
7634 40. When delivering a message, the value of $return_path is set to $sender_
7635 address at the start of routing (routers may change the value). By an
7636 oversight, this default was not being set up when an address was tested by
7637 -bt or -bv, which affected the outcome if any router or filter referred to
7640 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7641 log only when "message" or "log_message" are set. However, if one of the
7642 conditions was an address verification, or a call to a nested ACL, the
7643 messages generated by the underlying test were being passed through. This
7644 no longer happens. The underlying message is available in $acl_verify_
7645 message for both "message" and "log_message" expansions, so it can be
7646 passed through if needed.
7648 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7649 new expansion $bh_ to give the encoded byte string without charset
7650 translation. Translation happens only if iconv() is available; HAVE_ICONV
7651 indicates this at build time. HEADERS_CHARSET gives the charset to
7652 translate to; headers_charset can change it in the configuration, and
7653 "headers charset" can change it in an individual filter file.
7655 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7656 that creates RFC 2047 encoded "words" labels them as that charset instead
7657 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7658 expansion operator; (ii) when Exim creates a From: line for a local
7659 message; (iii) when a header line is rewritten to include a "phrase" part.
7661 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7662 buggy, causing it to skip the first lines of messages whose message ID
7663 ended in 'D'. This would not have bitten before Exim release 4.14, because
7664 message IDs were unlikely to end in 'D' before then. The effect was to have
7665 incorrect size information for certain domains.
7667 45. #include "config.h" was missing at the start of the crypt16.c module. This
7668 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7671 46. If there was a timeout during a "random" callout check, Exim treated it as
7672 a failure of the random address, and carried on sending RSET and the real
7673 address. If the delay was just some slowness somewhere, the response to the
7674 original RCPT would be taken as a response to RSET and so on, causing
7675 mayhem of various kinds.
7677 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7678 when I implemented it. It didn't allow for the fact that some option values
7679 may legitimately be negative (e.g. size_addition), and it didn't even do
7680 the right test for positive values.
7682 48. Domain names in DNS records are case-independent. Exim always looks them up
7683 in lower case. Some resolvers return domain names in exactly the case they
7684 appear in the zone file, that is, they may contain uppercase letters. Not
7685 all resolvers do this - some return always lower case. Exim was treating a
7686 change of case by a resolver as a change of domain, similar to a widening
7687 of a domain abbreviation. This triggered its re-routing code and so it was
7688 trying to route what was effectively the same domain again. This normally
7689 caused routing to fail (because the router wouldn't handle the domain
7690 twice). Now Exim checks for this case specially, and just changes the
7691 casing of the domain that it ultimately uses when it transmits the message
7694 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7697 50. If a filter generated a file delivery with a non-absolute name (possible if
7698 no home directory exists for the router), the forbid_file option was not
7701 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7702 the existing equality matching.
7704 52. Exim was using ints instead of ino_t variables in some places where it was
7705 dealing with inode numbers.
7707 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7708 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7709 called TMPDIR, and if it finds it is different, it changes its value.
7711 54. The smtp_printf() function is now made available to local_scan() so
7712 additional output lines can be written before returning. There is also an
7713 smtp_fflush() function to enable the detection of a dropped connection.
7714 The variables smtp_input and smtp_batched_input are exported to
7717 55. Changed the default runtime configuration: the message "Unknown user"
7718 has been removed from the ACL, and instead placed on the localuser router,
7719 using the cannot_route_message feature. This means that any verification
7720 failures that generate their own messages won't get overridden. Similarly,
7721 the "Unrouteable address" message that was in the ACL for unverifiable
7722 relay addresses has also been removed.
7724 56. Added hosts_avoid_esmtp to the smtp transport.
7726 57. The exicyclog script was not checking for the esoteric option
7727 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7728 will work only if exicyclog is run under the appropriate euid.
7730 58. Following a discussion on the list, the rules by which Exim recognises line
7731 endings on incoming messages have been changed. The -dropcr and drop_cr
7732 options are now no-ops, retained only for backwards compatibility. The
7733 following line terminators are recognized: LF CRLF CR. However, special
7734 processing applies to CR:
7736 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7737 nor a local message in the state where . is a terminator.
7739 (ii) If a bare CR is encountered in a header line, an extra space is added
7740 after the line terminator so as not to end the header. The reasoning
7741 behind this is that bare CRs in header lines are most likely either
7742 to be mistakes, or people trying to play silly games.
7744 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7745 was being incorrectly given as 18 bytes larger than it should have been.
7746 This is a VOB (very old bug).
7748 60. This may never have affected anything current, but just in case it has:
7749 When the local host is found other than at the start of a list of hosts,
7750 the local host, those with the same MX, and any that follow, are discarded.
7751 When the list in question was part of a longer list of hosts, the following
7752 hosts (not currently being processed) were also being discarded. This no
7753 longer happens. I'm not sure if this situation could ever has previously
7756 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7759 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7760 header. This is something that is recommended in a new Internet Draft, and
7761 is something that is documented as being done by Sendmail. There are two
7762 possible values. For messages generated by the autoreply transport, Exim
7765 Auto-Submitted: auto-replied
7767 whereas for all other generated messages (e.g. bounces) it adds
7769 Auto-Submitted: auto-generated
7771 63. The "personal" condition in filters now includes a test for the
7772 Auto-Submitted: header. If it contains the string "auto-" the message it
7773 not considered personal.
7775 64. Added rcpt_include_affixes as a generic transport option.
7777 65. Added queue_only_override (default true).
7779 66. Added the syslog_duplication option.
7781 67. If what should have been the first header line of a message consisted of
7782 a space followed by a colon, Exim was mis-interpreting it as a header line.
7783 It isn't of course - it is syntactically invalid and should therefore be
7784 treated as the start of the message body. The misbehaviour could have
7785 caused a number of strange effects, including loss of data in subsequent
7786 header lines, and spool format errors.
7788 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7789 client host had authenticated. This control can now be exercised by an ACL
7790 for more flexibility.
7792 69. By default, callouts do not happen when testing with -bh. There is now a
7793 variant, -bhc, which does actually run the callout code, including
7794 consulting and updating the callout cache.
7796 70. Added support for saslauthd authentication, courtesy of Alexander
7799 71. If statvfs() failed on the spool or log directories while checking their
7800 size for availability, Exim confusingly gave the error "space shortage".
7801 Furthermore, in debugging mode it crashed with a floating point exception.
7802 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7803 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7804 serious problem, Exim now writes to the main and panic logs when this
7805 happens, with details of the failure. It then refuses to accept the
7806 incoming message, giving the message "spool directory problem" or "log
7807 directory problem" with a 421 code for SMTP messages.
7809 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7810 0, 1, and 2 exist, because some OS complain for execs without them (see
7811 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7812 descriptors. However, the code omitted to check that the open succeeded,
7813 causing mysterious errors if for some reason the permissions on /dev/null
7814 got screwed. Now Exim writes a message to the main and panic logs, and
7815 bombs out if it can't open /dev/null.
7817 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7818 interact so that it is all more flexible. It is supposed to remain
7819 backwards compatible. Also added extra_local_interfaces.
7821 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7822 to bomb out with an assertion failure - to the client this appears as a
7823 connection drop. This problem occurs in the part of the code that was taken
7824 from the Samba project. Fortunately, the assertion is in a very simple
7825 function, so I have fixed this by reproducing the function inline in the
7826 one place where it is called, and arranging for authentication to fail
7827 instead of killing the process with assert().
7829 75. The SPA client code was not working when the server requested OEM rather
7830 than Unicode encoding.
7832 76. Added code to make require_files with a specific uid setting more usable in
7833 the case where statting the file as root fails - usually a non-root-mounted
7834 NFS file system. When this happens and the failure is EACCES, Exim now
7835 forks a subprocess and does the per-uid checking as the relevant uid.
7837 77. Added process_log_path.
7839 78. If log_file_path was not explicitly set, a setting of check_log_space or
7840 check_log_inodes was ignored.
7842 79. If a space check for the spool or log partitions fails, the incident is now
7843 logged. Of course, in the latter case the data may get lost...
7845 80. Added the %p formatting code to string_format() so that it can be used to
7846 print addresses in debug_print(). Adjusted all the address printing in the
7847 debugging in store.c to use %p rather than %d.
7849 81. There was a concern that a line of code in smtp_in.c could overflow a
7850 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7851 initially expressed, the concern was not well-founded, because trailing
7852 spaces are removed early. However, if the trailing spaces were followed by
7853 a NULL, they did not get removed, so the overflow was possible. Two fixes
7856 (a) I re-wrote the offending code in a cleaner fashion.
7857 (b) If an incoming SMTP command contains a NULL character, it is rejected
7860 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7861 runs initgroups(), so that if the Exim user is in any additional groups,
7862 they will be used during message reception.
7868 The change log for 4.20 and earlier releases has been archived.