1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
66 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
67 excluded, not matching the documentation.
69 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
70 was given for the sqlite_dbfile a trap resulted.
72 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
73 "name" argument resulted in a trap. There is no reason to disallow such;
74 this was a coding error.
76 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
77 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
78 spent suspended, ignoring the Posix definition. Previously we assumed
79 it did and a constant offset from real time could be used as a correction.
80 Change to using the same clock source for the start-of-message and the
81 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
82 exists, just to get a clock slightly more aligned to reality.
84 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
85 RFC says it is optional some validators care. The missing char was not
86 intended but triggered by a line-wrap alignement. Discovery and fix by
87 Guillaume Outters, hacked on by JH.
89 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
90 name being quoted was tainted a trap would be taken. Fix by using
91 dynamicaly created buffers. The routine could have been called by a
92 rewrite with the "h" flag, by using the "-F" command-line option, or
93 by using a "name=" option on a control=submission ACL modifier.
95 JH/19 SPF: change the Authentication-Results expansion component to give
96 smtp.helo when the sender domain is empty. Previously it gave
99 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
100 not in 127.0.0.0/8 to help in spotting list domains taken over by a
101 domain-parking registrar.
103 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
104 Previously when a whitespace character was specified it was not inserted
105 after removing the newline.
107 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
108 the domain part of the recipient address. This overrides any tls_sni
109 option set, which was previously used.
111 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
114 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
115 is_tainted() had an off-by-one error in the overenthusiastic direction.
116 Find and fix by Gavan. Although NetBSD is not a supported platform for
117 4.94 this bug could affect other platforms.
119 PP/01 Fix default prime selection to be consistent.
120 One path used ike23 still, instead of exim.dev.20160529.3; now both
121 execution flows will use the same DH primes (currently
122 exim.dev.20160529.3).
124 JH/25 OpenSSL: Fix back-compatibiility behaviour surrounding tls_certificates
125 option in smtp transport, to match the documentation. Previously
126 verification was not being done in some cases where it should have been.
132 JH/01 Avoid costly startup code when not strictly needed. This reduces time
133 for some exim process initialisations. It does mean that the logging
134 of TLS configuration problems is only done for the daemon startup.
136 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
138 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
139 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
142 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
143 DKIM signing is being done. Previously a transport_filter would always
144 disable CHUNKING, falling back to traditional DATA.
146 JH/05 Regard command-line recipients as tainted.
148 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
150 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
151 PAM library frees one of the arguments given to it, despite the
152 documentation. Therefore a plain malloc must be used.
154 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
155 on-stack buffers were used, resulting in a taint trap when DSN information
156 copied from a received message was written into the buffer.
158 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
159 the ordering of its ARC headers. This caused a crash.
161 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
162 a new record was being constructed with information from the peer, a trap
165 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
166 installation would get error messages from DMARC verify, when it hit the
167 nonexistent file indicated by the default. Distros wanting DMARC enabled
168 should both provide the file and set the option.
169 Also enforce no DMARC verification for command-line sourced messages.
171 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
172 could, depending on the platform, hang at the STARTTLS response.
174 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
175 message on a connection. Previously if one message had ARC headers and
176 the following one did not, a crash could result when adding an
177 Authentication-Results: header.
179 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
180 Exim main code and Exim-related utities. The introduction of taint
181 tracking also did many adjustments to string handling. Since then, eximon
182 frequently terminated with an assert failure.
184 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
185 check for 452 responses. This slightly helps the inefficieny of doing
186 a large alias-expansion into a recipient-limited target. The max_rcpt
187 transport option still applies (and at the current default, will override
188 the new feature). The check is done for either cause of synch, and forces
189 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
190 connection. The new facility is not tunable at this time.
192 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
193 library live data was being used, so the results became garbage. Make
194 copies while it is still usable.
196 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
197 on delivery deferred (==) and failed (**) lines (if a delivery was
198 attemtped). Previously it was only on completion (=>) lines.
200 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
201 for the expansion of the server_scram_iter and server_scram_salt options.
203 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
204 are now specifically given a NO_DATA response without hitting the system
205 resolver. The library goes on to do the now-standard TXT lookup.
206 Use of dnsdb lookups is not affected.
208 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
209 only retrieve the errormessage once. Previously two calls to dlerror()
210 were used, and the second one (for mainlog/paniclog) retrieved null
213 JH/20 Taint checking: disallow use of tainted data for
214 - the appendfile transport file and directory options
215 - the pipe transport command
216 - the autoreply transport file, log and once options
217 - file names used by the redirect router (including filter files)
219 - paths used by single-key lookups
220 Previously this was permitted.
222 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
223 adjusted the size of a major service buffer; this failed because the
224 buffer was in use at the time. Change to a compile-time increase in the
225 buffer size, when this authenticator is compiled into exim.
227 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
228 previous fast-mode was untenable in the face of glibs using mmap to
229 support larger malloc requests.
231 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
232 New values supported, if defined on system where compiled:
233 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
234 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
236 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
237 running a limited number of proceses in parallel, a benefit is gained. The
238 amount varies with the platform hardware and load. The use of the option
239 queue_run_in_order means we cannot do this, as ordering becomes
242 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
243 had introduced a string-copy (for ensuring NUL-termination) which was not
244 appropriate for that case, which can include embedded NUL bytes in the
245 block of data. Investigation showed the copy to actually be needless, the
246 data being length-specified.
248 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
249 done during a receiving connection, and both used TLS, global info was
250 used rather than per-connection info for tracking the state of data
251 queued for transmission. This could result in a connection hang.
253 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
254 Previously, when delivering serveral messages down a single connection
255 only the first would provide a SIZE. This was due to the size information
256 not being properly tracked.
258 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
259 TAI (at 37 seconds currently), pretend to be in UTC for time-related
260 expansion and logging. Previously, spurious values such as a future
261 minute could be seen.
263 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
264 it could crash from a null-deref. This could also affect the
265 ${addresses: } operator and ${readsock } item.
267 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
268 message following a mime one, the variable was not reset.
270 JH/30 When an pipelined-connect fails at the first response, assume incorrect
271 cached capability (perhaps the peer reneged?) and immediately retry in
274 JH/31 Fix spurious detection of timeout while writing to transport filter.
276 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
277 an attempt to copy the string was made before checking it.
279 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
280 taint of the lookup key was maintained; we now regard the presence in the
281 filesystem as sufficient validation.
283 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
284 argument is supplied.
286 JH/35 The dsearch lookup now requires that the directory is an absolute path.
287 Previously this was not checked, and nonempty relative paths made an
288 access under Exim's current working directory.
290 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
291 Previously no event was raised.
293 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
294 parameter supplied by the sender MAIL FROM command. Previously it was
295 ignored, and only the check_spool_space option value for the required
298 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
299 the size of the signing public-key. Previously it was instead giving
300 the size of the signature hash.
302 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
303 the default. See the (new) dkim_verify_min_keysizes option.
305 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
306 and an ACL use a lookup for checking either the local_part or domain,
307 stale data could be accessed. Ensure that variable references are
308 dropped between messages.
310 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
311 by the client was not checked as pointing within response data before
312 being used. A malicious client could thus cause an out-of-bounds read and
313 possibly gain authentication. Fix by adding the check.
315 JH/42 Internationalisation: change the default for downconversion in the smtp
316 transport to be "if needed". Previously it was "as previously set" for
317 the message, which usually meant "if needed" for message-submission but
318 "no" for everything else. However, MTAs have been seen using SMTPUTF8
319 even when the envelope addresses did not need it, resulting in forwarding
320 failures to non-supporting MTAs. A downconvert in such cases will be
321 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
322 transport. The change does mean that addresses needing conversion will
323 be converted when previously a delivery failure would occur.
325 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
326 response was received it would be used unchecked in a fail-DSN, violating
327 standards on line-length limits. Truncate if needed.
329 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
330 doesn't work. (Additionally add a new main config option to configure the
337 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
338 side, to decode a TLS 1.3 packet capture.
340 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
341 Previously the default library behaviour applied, sending two, each in
344 JH/03 Debug output for ACL now gives the config file name and line number for
347 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
349 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
351 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
352 buffer overrun for (non-chunking) other transports.
354 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
355 TLS1.3, means that a server rejecting a client certificate is not visible
356 to the client until the first read of encrypted data (typically the
357 response to EHLO). Add detection for that case and treat it as a failed
358 TLS connection attempt, so that the normal retry-in-clear can work (if
359 suitably configured).
361 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
362 and/or domain. Found and fixed by Jason Betts.
364 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
365 configuration). If a CNAME target was not a wellformed name pattern, a
368 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
369 the OS reports them interleaved with other addresses.
371 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
372 used both for input and for a verify callout, both encrypted, SMTP
373 responses being sent by the server could be lost. This resulted in
374 dropped connections and sometimes bounces generated by a peer sending
377 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
378 string. Previously it was possible to cause undefined behaviour in a
379 library routine (usually a crash). Found by "zerons".
381 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
384 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
385 API was removed, so update to use the newer ones.
387 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
388 any timeout set, is taking a long time. Previously we would hang on to a
389 rotated logfile "forever" if the input was arriving with long gaps
390 (a previous attempt to fix addressed lack, for a long time, of initial
393 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
394 shared (NFS) environment. The length of the tempfile name is now
395 4 + 16 ("hdr.$message_exim_id") which might break on file
396 systems which restrict the file name length to lower values.
399 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
400 shared (NFS) environment.
402 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
403 did for all versions <4.90). Notably -M, -m, --invert, -I may be
406 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
407 on some platforms for bit 31.
409 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
410 to changes apparently associated with TLS1.3 handling some of the APIs
411 previously used were either nonfunctional or inappropriate. Strings
412 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
413 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
414 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
415 This affects log line X= elements, the $tls_{in,out}_cipher variables,
416 and the use of specific cipher names in the encrypted= ACL condition.
418 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
420 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
421 verification result was not updated unless hosts_require_ocsp applied.
423 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
424 queue_list_requires_admin set to false, non-admin users were denied the
427 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
428 directory-of-certs mode. Previously they were advertised despite the
431 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
432 A single TCP connection by a client will now hold a TLS connection open
433 for multiple message deliveries, by default. Previously the default was to
436 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
437 default. If built with the facility, DANE will be used. The facility
438 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
440 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
441 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
442 must be defined and you must still, unless you define DISABLE_TLS, manage
443 the the include-dir and library-file requirements that go with that
444 choice. Non-TLS builds are still supported.
446 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
449 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
450 default. If the platform supports and has the facility enabled, it will
451 be requested on all coneections.
453 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
454 controlled by the build-time option SUPPORT_PIPE_CONNECT.
456 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
458 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
459 success-DSN messages. Previously the From: header was always the default
460 one for these; the option was ignored.
462 JH/28 Fix the timeout on smtp response to apply to the whole response.
463 Previously it was reset for every read, so a teergrubing peer sending
464 single bytes within the time limit could extend the connection for a
465 long time. Credit to Qualsys Security Advisory Team for the discovery.
467 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
468 delivery address, which leaked information of the results of local
469 forwarding. Change to the original envelope recipient address, per
472 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
473 requested. Previously not bounce was generated and a log entry of
474 error ignored was made.
476 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
478 JH/32 Introduce a general tainting mechanism for values read from the input
479 channel, and values derived from them. Refuse to expand any tainted
480 values, to catch one form of exploit.
482 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
483 was unused and the unexpanded text used for the test. Found and
484 fixed by Ruben Jenster.
486 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
487 an attempt to use a TLS library read routine dereffed a nul pointer,
490 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
491 them in our smtp response.
493 JH/36 Have the general router option retry_use_local_part default to true when
494 any of the restrictive preconditions are set (to anything). Previously it
495 was only for check_local user. The change removes one item of manual
496 configuration which is required for proper retries when a remote router
497 handles a subset of addresses for a domain.
499 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
500 link count into consideration.
502 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
503 caused the extension of big_buffer, the following lines were ignored.
505 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
506 accordance with RFC 2308. Previously there was no expiry, so a longlived
507 receive process (eg. due to ACL delays) versus a short SOA value could
510 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
512 JH/39 Promote DMARC support to mainline.
514 JH/40 Bug 2452: Add a References: header to DSNs.
516 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
517 parameters. The relevant library call is documented as "Deprecated: This
518 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
519 3.6.0, DH parameters are negotiated following RFC7919."
521 HS/06 Change the default of dnssec_request_domains to "*"
523 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
524 carried on and emitted a BDAT command, even when PIPELINING was not
527 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
528 buffer was used for the filename, resulting in a trap when tainted
529 arguments (eg. $domain) were used.
531 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
532 recommended to avoid a possible server-load attack. The feature can be
533 re-enabled via the openssl_options main cofiguration option.
535 JH/45 local_scan API: documented the current smtp_printf() call. This changed
536 for version 4.90 - adding a "more data" boolean to the arguments.
537 Bumped the ABI version number also, this having been missed previously;
538 release versions 4.90 to 4.92.3 inclusive were effectively broken in
539 respect of usage of smtp_printf() by either local_scan code or libraries
540 accessed via the ${dlfunc } expansion item. Both will need coding
541 adjustment for any calls to smtp_printf() to match the new function
542 signature; a FALSE value for the new argument is always safe.
544 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
545 the file-offset (which the Linux syscall does, and exim expects); this
546 resulted in an indefinite loop.
548 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
549 to do ARC verification. The Authentication-Results: header line added
550 by the configuration then had no ARC item.
556 JH/01 Remove code calling the customisable local_scan function, unless a new
557 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
559 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
560 non-signal-safe functions being used.
562 JH/03 Bug 2269: When presented with a received message having a stupidly large
563 number of DKIM-Signature headers, disable DKIM verification to avoid
564 a resource-consumption attack. The limit is set at twenty.
566 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
567 report of oldest_pass in ${authres } in consequence, and separate out
568 some descriptions of reasons for verification fail.
570 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
571 files in the spool were present and unlocked. A queue-runner could spot
572 them, resulting in a duplicate delivery. Fix that by doing the unlock
573 after the unlink. Investigation by Tim Stewart. Take the opportunity to
574 add more error-checking on spoolfile handling while that code is being
577 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
578 No known attacks, no CVE, this is defensive hardening.
580 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
581 a queue-runner could start a delivery while other operations were ongoing.
582 Cutthrough delivery was a common victim, resulting in duplicate delivery.
583 Found and investigated by Tim Stewart. Fix by using the open message data
584 file handle rather than opening another, and not locally closing it (which
585 releases a lock) for that case, while creating the temporary .eml format
586 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
588 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
589 $sender_verify_failure/$recipient_verify_failure to "random".
591 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
594 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
595 Previously this would segfault.
597 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
600 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
601 like zero, since the resolver should be doing this for us, But we need one
602 as a CNAME but no MX presence gets the CNAME returned; we need to check
603 that doesn't point to an MX to declare it "no MX returned" rather than
604 "error, loop". A new main option is added so the older capability of
605 following some limited number of chain links is maintained.
607 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
609 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
610 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
611 now-deprecated earlier definitions used only specified the range up to TLS
612 1.2 (in the older-version library docs).
614 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
616 JH/15 Rework TLS client-side context management. Stop using a global, and
617 explicitly pass a context around. This enables future use of TLS for
618 connections to service-daemons (eg. malware scanning) while a client smtp
619 connection is using TLS; with cutthrough connections this is quite likely.
621 JH/16 Fix ARC verification to do AS checks in reverse order.
623 JH/17 Support a "tls" option on the ${readsocket } expansion item.
625 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
626 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
627 Previously the "utf8" would be re-prepended for every additional message.
629 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
630 Previously thery were accepted, resulting in issues when attempting to
631 forward messages to a non-supporting MTA.
633 PP/02 Let -n work with printing macros too, not just options.
635 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
636 one parent address was copied, and bogus data was used at delivery-logging
637 time. Either a crash (after delivery) or bogus log data could result.
638 Discovery and analysis by Tim Stewart.
640 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
641 Previously if the string ended mid-character, we did not insert the
642 promised '?' replacement.
644 PP/04 Documentation: current string operators work on bytes, not codepoints.
646 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
647 should pack well giving a smaller memory footprint so better caching and
648 therefore performance. Group the declarations where this can't be done so
649 that the byte-sized flag variables are not interspersed among pointer
650 variables, giving a better chance of good packing by the compiler.
652 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
653 non-null, to avoid issues with sites running BATV. Previously reports were
654 sent with an empty envelope sender so looked like bounces.
656 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
657 The ignore_error flag wasn't being returned from the filter subprocess so
658 was not set for later routers. Investigation and fix by Matthias Kurz.
660 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
661 and a msg:complete for the whole, when a message is manually removed using
662 -Mrm. Developement by Matthias Kurz, hacked on by JH.
664 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
665 a "Gnu special" function, asprintf() in the DB utility binary builds; I
666 hope that is portable enough.
668 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
669 requiring a known-CA anchor certificate; make it now rely entirely on the
670 TLSA as an anchor. Checking the name on the leaf cert against the name
671 on the A-record for the host is still done for TA (but not for EE mode).
673 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
674 included in delivery lines for non-proxied connections, when compiled with
675 SUPPORT_SOCKS and running with proxy logging enabled.
677 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
678 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
679 move the existing event to fire before the normal logging of message
680 failure so that custom logging is bracketed by normal logging.
682 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
683 msg:fail:internal event. Developement by Matthias Kurz.
685 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
686 far too small for todays use of crypto signatures stored there. Go all
687 the way to the max DNS message size of 64kB, even though this might be
688 overmuch for IOT constrained device use.
690 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
691 copy a string over itself. The library routine is documented as not
692 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
694 JH/32 For main options check_spool_space and check_inode_space, where the
695 platform supports 64b integers, support more than the previous 2^31 kB
696 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
697 the previous G, M, k.
699 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
700 $authenticated_fail_id variable on authentication failure. Previously
703 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
704 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
705 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
706 GNUTLS_SEC_PARAM_MEDIUM.
708 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
709 side. Previously we would continue as if no SNI had been received.
711 JH/36 Harden the handling of string-lists. When a list consisted of a sole
712 "<" character, which should be a list-separator specification, we walked
713 off past the nul-terimation.
715 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
716 causes) even when the retry time is not yet met. Previously they were
717 not, meaning that when (say) an account was over-quota and temp-rejecting,
718 and multiple senders' messages were queued, only one sender would get
719 notified on each configured delay_warning cycle.
721 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
723 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
724 cipher-suites, an error can be left on the stack even for a succeeding
725 accept; this results in impossible error messages when a later operation
728 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
729 return error codes indicating retry. Under TLS1.3 this becomes required.
731 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
732 it only wrote the new authenticators, resulting in a lack of tracking of
733 peer changes of ESMTP extensions until the next cache flush.
735 JH/41 Fix the loop reading a message header line to check for integer overflow,
736 and more-often against header_maxsize. Previously a crafted message could
737 induce a crash of the recive process; now the message is cleanly rejected.
739 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
740 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
746 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
747 When redis_servers is set to a list of > 1 element, and the Redis servers
748 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
749 case of MOVED into a DEFER case instead, thus moving the query onto the
750 next server in the list. For a cluster of N elements, all N servers must
751 be defined in redis_servers.
753 GF/02 Catch and remove uninitialized value warning in exiqsumm
754 Check for existence of @ARGV before looking at $ARGV[0]
756 JH/01 Replace the store_release() internal interface with store_newblock(),
757 which internalises the check required to safely use the old one, plus
758 the allocate and data copy operations duplicated in both (!) of the
759 extant use locations.
761 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
762 modifier. This matches the restriction on the commandline.
764 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
765 Previously only the last row was returned.
767 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
768 we assumed that tags in the header were well-formed, and parsed the
769 element content after inspecting only the first char of the tag.
770 Assumptions at that stage could crash the receive process on malformed
773 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
774 While running the DKIM ACL we operate on the Permanent memory pool so that
775 variables created with "set" persist to the DATA ACL. Also (at any time)
776 DNS lookups that fail create cache records using the Permanent pool. But
777 expansions release any allocations made on the current pool - so a dnsdb
778 lookup expansion done in the DKIM ACL releases the memory used for the
779 DNS negative-cache, and bad things result. Solution is to switch to the
780 Main pool for expansions.
781 While we're in that code, add checks on the DNS cache during store_reset,
782 active in the testsuite.
783 Problem spotted, and debugging aided, by Wolfgang Breyha.
785 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
786 When none of the hosts presented to a transport match an already-open
787 connection, close it and proceed with the list. Previously we would
788 queue the message. Spotted by Lena with Yahoo, probably involving
791 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
792 Previously a spurious "250 OK id=" response was appended to the proper
795 JH/08 The "support for" informational output now, which built with Content
796 Scanning support, has a line for the malware scanner interfaces compiled
797 in. Interface can be individually included or not at build time.
799 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
800 by the template makefile "src/EDITME". The "STREAM" support for an older
801 ClamAV interface method is removed.
803 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
804 rows affected is given instead).
806 JH/11 The runtime Berkeley DB library version is now additionally output by
807 "exim -d -bV". Previously only the compile-time version was shown.
809 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
810 SMTP connection. Previously, when one had more recipients than the
811 first, an abortive onward connection was made. Move to full support for
812 multiple onward connections in sequence, handling cutthrough connection
813 for all multi-message initiating connections.
815 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
816 routers. Previously, a multi-recipient message would fail to match the
817 onward-connection opened for the first recipient, and cause its closure.
819 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
820 a timeout on read on a GnuTLS initiating connection, resulting in the
821 initiating connection being dropped. This mattered most when the callout
822 was marked defer_ok. Fix to keep the two timeout-detection methods
825 JH/15 Relax results from ACL control request to enable cutthrough, in
826 unsupported situations, from error to silently (except under debug)
827 ignoring. This covers use with PRDR, frozen messages, queue-only and
830 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
832 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
833 metadata, resulting in a crash in free().
835 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
836 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
837 Broken also in d185889f4, with init system revamp.
839 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
840 Previously we abruptly closed the connection after reading a malware-
841 found indication; now we go on to read the "scan ok" response line,
844 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
845 ACL. Previously, a crash would result.
847 JH/19 Speed up macro lookups during configuration file read, by skipping non-
848 macro text after a replacement (previously it was only once per line) and
849 by skipping builtin macros when searching for an uppercase lead character.
851 JH/20 DANE support moved from Experimental to mainline. The Makefile control
852 for the build is renamed.
854 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
855 was allocated for every new TLS startup, meaning one per message. Fix
856 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
858 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
859 reported the original. Fix to report (as far as possible) the ACL
860 result replacing the original.
862 JH/23 Fix memory leak during multi-message connections using STARTTLS under
863 OpenSSL. Certificate information is loaded for every new TLS startup,
864 and the resources needed to be freed.
866 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
868 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
871 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
872 DATA response info to the (existing) per-recipient response info for
873 the "C=" log element. It can have useful tracking info from the
874 destination system. Patch from Simon Arlott.
876 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
877 length value. Previously this would segfault.
879 HS/02 Support Avast multiline protoocol, this allows passing flags to
880 newer versions of the scanner.
882 JH/28 Ensure that variables possibly set during message acceptance are marked
883 dead before release of memory in the daemon loop. This stops complaints
884 about them when the debug_store option is enabled. Discovered specifically
885 for sender_rate_period, but applies to a whole set of variables.
886 Do the same for the queue-runner and queue-list loops, for variables set
887 from spool message files. Do the same for the SMTP per-message loop, for
888 certain variables indirectly set in ACL operations.
890 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
891 as a multi-recipient message from a mailinglist manager). The coding had
892 an arbitrary cutoff number of characters while checking for more input;
893 enforced by writing a NUL into the buffer. This corrupted long / fast
894 input. The problem was exposed more widely when more pipelineing of SMTP
895 responses was introduced, and one Exim system was feeding another.
896 The symptom is log complaints of SMTP syntax error (NUL chars) on the
897 receiving system, and refused recipients seen by the sending system
898 (propating to people being dropped from mailing lists).
899 Discovered and pinpointed by David Carter.
901 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
902 replaced by the ${authresults } expansion.
904 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
906 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
907 allows proper process termination in container environments.
909 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
910 Previously the "final dot" had a newline after it; ensure it is CR,LF.
912 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
913 and "err_perm", deprecated since 4.83 when the RFC-defined words
914 "temperror" and "permerror" were introduced.
916 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
917 transport-filters or DKIM-signing. The restriction was lost in the
918 consolidation of verify-callout and delivery SMTP handling.
919 Extend the restriction to also cover ARC-signing.
921 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
922 in defer=pass mode supply a 450 to the initiator. Previously the message
925 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
926 tls_require_ciphers is used as before.
928 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
929 "pass_unscanned". Only tmpfails from the scanner are written to
930 the paniclog, as they may require admin intervention (permission
931 denied, license issues). Other scanner errors (like decompression
932 bombs) do not cause a paniclog entry.
934 JH/36 Fix reinitialisation of DKIM logging variable between messages.
935 Previously it was possible to log spurious information in receive log
938 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
939 triggered odd behaviour from Outlook Express clients.
941 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
944 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
945 since the IETF WG has not yet settled on that versus the original
946 "bare" representation.
948 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
949 Previously the millisecond value corrupted the output.
950 Fix also for syslog_pid=no and log_selector +pid, for which the pid
951 corrupted the output.
957 JH/01 Rework error string handling in TLS interface so that the caller in
958 more cases is responsible for logging. This permits library-sourced
959 string to be attached to addresses during delivery, and collapses
960 pairs of long lines into single ones.
962 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
963 during configuration. Wildcards are allowed and expanded.
965 JH/02 Rework error string handling in DKIM to pass more info back to callers.
966 This permits better logging.
968 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
969 do not close it down and have the child transport start it up again on
970 the passed-on TCP connection. Instead, proxy the child (and any
971 subsequent ones) for TLS via a unix-domain socket channel. Logging is
972 affected: the continued delivery log lines do not have any DNSSEC, TLS
973 Certificate or OCSP information. TLS cipher information is still logged.
975 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
976 identical IP addresses on different listening ports. Will also affect
979 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
980 add noisy ifdef guards to special-case this sillyness.
981 Patch from Bernd Kuhls.
983 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
984 than 255 are no longer allowed.
986 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
987 Disable the session-cache too, which might reduce our load. Since we
988 currrectly use a new context for every connection, both as server and
989 client, there is no benefit for these.
990 GnuTLS appears to not support tickets server-side by default (we don't
991 call gnutls_session_ticket_enable_server()) but client side is enabled
992 by default on recent versions (3.1.3 +) unless the PFS priority string
995 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
996 <https://reproducible-builds.org/specs/source-date-epoch/>.
998 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
999 the check for any unsuccessful recipients did not notice the limit, and
1000 erroneously found still-pending ones.
1002 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1003 MSG_MORE. Only in-clear (not on TLS connections).
1005 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1006 transport-filter is involved we can buffer the headers in memory for
1007 creating the signature, and read the spool data file once for the
1008 signature and again for transmission.
1010 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1011 4.77 as the kernel support then wasn't solid, having issues in 64bit
1012 mode. Now, it's been long enough. Add support for FreeBSD also.
1014 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1015 case where the routing stage had gathered several addresses to send to
1016 a host before calling the transport for the first, we previously failed
1017 to close down TLS in the old transport process before passing the TCP
1018 connection to the new process. The new one sent a STARTTLS command
1019 which naturally failed, giving a failed delivery and bloating the retry
1020 database. Investigation and fix prototype from Wolfgang Breyha.
1022 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1023 false-negatives in the check that the sender had not preempted a response
1024 or prompt from Exim (running as a server), due to that code's lack of
1025 awareness of the SMTP input buffering.
1027 PP/04 Add commandline_checks_require_admin option.
1028 Exim drops privileges sanely, various checks such as -be aren't a
1029 security problem, as long as you trust local users with access to their
1030 own account. When invoked by services which pass untrusted data to
1031 Exim, this might be an issue. Set this option in main configuration
1032 AND make fixes to the calling application, such as using `--` to stop
1035 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1036 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1037 responses to those, into a single TLS record each way (this usually means
1038 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1041 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1042 affects you only if you're dancing at the edge of the param size limits.
1043 If you are, and this message makes sense to you, then: raise the
1044 configured limit or use OpenSSL 1.1. Nothing we can do for older
1047 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1048 cmdline element to get the documented default one. Previously it was
1051 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1052 are unsuable for non-message-specific reasons - eg. connection timeout,
1053 banner-time rejection.
1055 JH/16 Fix logging of delivery remote port, when specified by router, under
1058 PP/06 Repair manualroute's ability to take options in any order, even if one
1059 is the name of a transport.
1062 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1064 JH/17 Change the list-building routines interface to use the expanding-string
1065 triplet model, for better allocation and copying behaviour.
1067 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1068 Previously it was constructed the first time a possibly-matching string
1069 was met in the configuration file input during startup; now it is done
1072 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1073 compatible one, to avoid the (poorly documented) possibility of a config
1074 file in the working directory redirecting the DB files, possibly correpting
1075 some existing file. CVE-2017-10140 assigned for BDB.
1077 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1078 cache-hot. Previously, although the result was properly cached, the
1079 initial verify call returned a defer.
1081 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1082 the main verify for receipient in uncached-mode.
1084 JH/22 Retire historical build files to an "unsupported" subdir. These are
1085 defined as "ones for which we have no current evidence of testing".
1087 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1088 if present. Previously it was ignored.
1090 JH/24 Start using specified-initialisers in C structure init coding. This is
1091 a C99 feature (it's 2017, so now considered safe).
1093 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1094 if was a fixed-sized field and bitmask ops via macros; it is now more
1097 PP/07 GitHub PR 56: Apply MariaDB build fix.
1098 Patch provided by Jaroslav Škarvada.
1100 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1101 during Coverity cleanups [4.87 JH/47]
1102 Diagnosis and fix provided by Michael Fischer v. Mollard.
1104 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1105 the right size to place the terminating semicolon on its own folded
1106 line, the header hash was calculated to an incorrect value thanks to
1107 the (relaxed) space the fold became.
1109 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1110 and confused the parent.
1112 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1113 which could crash as a result. This could lead to undeliverable messages.
1115 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1118 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1119 matters on fast-turnover and PID-randomising systems, which were getting
1120 out-of-order delivery.
1122 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1123 a possibly-overlapping copy. The symptom was that "Remote host closed
1124 connection in response to HELO" was logged instead of the actual 4xx
1127 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1128 Previously only that bufferd was discarded, resulting in SYMTP command
1131 JH/32 DKIM: when a message has multiple signatures matching an identity given
1132 in dkim_verify_signers, run the dkim acl once for each. Previously only
1133 one run was done. Bug 2189.
1135 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1136 "panic the current process" to "deliberately defer". The panic log is
1137 still written with the problem list name; the mail and reject logs now
1138 get a temp-reject line for the message that was being handled, saying
1139 something like "domains check lookup or other defer". The SMTP 451
1140 message is still "Temporary local problem".
1142 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1143 A crafted sequence of BDAT commands could result in in-use memory beeing
1144 freed. CVE-2017-16943.
1146 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1147 from SMTP input. Previously it was always done; now only done for DATA
1148 and not BDAT commands. CVE-2017-16944.
1150 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1151 to the message (such as an overlong header line). Previously this was
1152 not done and we did not exit BDAT mode. Followon from the previous item
1153 though a different problem.
1159 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1160 than -2003 did; needs libidn2 in addition to libidn.
1162 JH/02 The path option on a pipe transport is now expanded before use.
1164 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1165 Patch provided by "Björn", documentation fix added too.
1167 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1168 missing a wire-to-host endian conversion.
1170 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1171 close after a BDAT command line could be taken as a following command,
1172 giving a synch failure. Fix by only checking for synch immediately
1173 before acknowledging the chunk.
1175 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1176 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1177 macro. Patches provided by Josh Soref.
1179 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1180 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1181 by IANA as a service extension. However, John Klensin suggests that we
1184 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1185 the dkim code may be unix-mode line endings rather than smtp wire-format
1186 CRLF, so prepend a CR to any bare LF.
1188 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1189 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1191 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1192 the first were themselves being wrongly included in the feed into dkim
1193 processing; with most chunk sizes in use this resulted in an incorrect
1194 body hash calculated value.
1196 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1197 DKIM signature block, for verification. Although advised against by
1198 standards it is specifically not ruled illegal.
1200 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1202 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1203 missing a body hash (the bh= tag).
1205 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1206 It seems that HAProxy sends the Proxy Protocol information in clear and
1207 only then does a TLS startup, so do the same.
1209 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1210 TCP connections (such as for Spamd) unless the daemon successfully set
1211 Fast Open mode on its listening sockets. This fixes breakage seen on
1212 too-old kernels or those not configured for Fast Open, at the cost of
1213 requiring both directions being enabled for TFO, and TFO never being used
1214 by non-daemon-related Exim processes.
1216 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1217 endings, at least on the first header line. Try to canonify any that get
1218 past that check, despite the cost.
1220 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1221 now limited to an arbitrary five deep, while parsing addresses with the
1222 strip_excess_angle_brackets option enabled.
1224 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1225 instead leave the unprompted TLS handshake in socket buffer for the
1226 TLS library to consume.
1228 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1230 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1232 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1233 region in one operation, for speed, and this leaves assigned pointers
1234 dangling. Add checks run only under the testsuite which checks all
1235 variables at a store-reset and panics on a dangling pointer; add code
1236 explicitly nulling out all the variables discovered. Fixes one known
1237 bug: a transport crash, where a dangling pointer for $sending_ip_address
1238 originally assigned in a verify callout, is re-used.
1240 PP/06 Drop '.' from @INC in various Perl scripts.
1242 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1244 PP/08 Reduce a number of compilation warnings under clang; building with
1245 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1246 should be warning-free.
1248 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1250 HS/01 Fix portability problems introduced by PP/08 for platforms where
1251 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1253 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1254 chunk. This allows us to accept broken chunked messages. We need a more
1255 general solution here.
1257 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1258 already-broken messages in the queue.
1260 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1262 JH/19 Fix reference counting bug in routing-generated-address tracking.
1268 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1269 supports it and a size is available (ie. the sending peer gave us one).
1271 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1272 years of being deprecated). The replacements are the ACLs
1273 acl_smtp_mime and acl_not_smtp_mime.
1275 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1276 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1277 or even an in-clear connection were permitted. Now, if the host lookup
1278 was dnssec and dane was requested then the host is only used if the
1279 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1280 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1281 if one fails this test.
1282 This means that a poorly-configured remote DNS will make it incommunicado;
1283 but it protects against a DNS-interception attack on it.
1285 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1286 non-noisy when a race steals the message being considered.
1288 JH/05 If main configuration option tls_certificate is unset, generate a
1289 self-signed certificate for inbound TLS connections.
1291 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1292 in rewrites and routers.
1294 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1295 and logged a warning sing 4.83; now they are a configuration file error.
1297 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1298 (lacking @domain). Apply the same qualification processing as RCPT.
1300 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1302 JH/10 Support ${sha256:} applied to a string (as well as the previous
1305 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1306 a cutthrough deliver is pending, as we always want to make a connection.
1307 This also avoids re-routing the message when later placing the cutthrough
1308 connection after a verify cache hit.
1309 Do not update it with the verify result either.
1311 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1312 when routing results in more than one destination address.
1314 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1315 signing (which inhibits the cutthrough capability). Previously only
1316 the presence of an option was tested; now an expansion evaluating as
1317 empty is permissible (obviously it should depend only on data available
1318 when the cutthrough connection is made).
1320 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1321 the relevant preceding SMTP command did not note the pipelining mode.
1323 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1324 Previously they were not counted.
1326 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1327 as one having no matching records. Previously we deferred the message
1328 that needed the lookup.
1330 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1331 distinguished as "(=".
1333 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1334 for missing MX records. Previously it only worked for missing A records.
1336 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1338 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1339 after the data-go-ahead and data-ack. Patch from Jason Betts.
1341 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1342 even for a "none" policy. Patch from Tony Meyer.
1344 JH/22 Fix continued use of a connection for further deliveries. If a port was
1345 specified by a router, it must also match for the delivery to be
1348 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1349 When one of the recipients of a message was unsuitable for the connection
1350 (has no matching addresses), we lost track of needing to mark it
1351 deferred. As a result mail would be lost.
1353 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1355 JH/25 Decoding ACL controls is now done using a binary search; the source code
1356 takes up less space and should be simpler to maintain. Merge the ACL
1357 condition decode tables also, with similar effect.
1359 JH/26 Fix problem with one_time used on a redirect router which returned the
1360 parent address unchanged. A retry would see the parent address marked as
1361 delivered, so not attempt the (identical) child. As a result mail would
1364 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1365 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1366 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1369 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1370 Main config options check_{log,spool}_{inodes,space} are now
1371 100 inodes, 10MB unless set otherwise in the configuration.
1373 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1374 Previously it only applied to the main-section connection policy
1377 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1379 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1380 by me. Added RFC7919 DH primes as an alternative.
1382 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1383 are not in the system include path.
1385 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1386 GnuTLS, when a session startup failed (eg because the client disconnected)
1387 Exim did stdio operations after fclose. This was exposed by a recent
1388 change which nulled out the file handle after the fclose.
1390 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1391 signed directly by the cert-signing cert, rather than an intermediate
1392 OCSP-signing cert. This is the model used by LetsEncrypt.
1394 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1396 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1397 an incoming connection.
1399 HS/02 Bug 1802: Do not half-close the connection after sending a request
1402 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1403 fallback to "prime256v1".
1405 JH/34 SECURITY: Use proper copy of DATA command in error message.
1406 Could leak key material. Remotely exploitable. CVE-2016-9963.
1412 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1413 and 3.4.4 - once the server is enabled to respond to an OCSP request
1414 it does even when not requested, resulting in a stapling non-aware
1415 client dropping the TLS connection.
1417 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1418 support variable-length bit vectors. No functional change.
1420 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1421 The I= interface field on outgoing lines is now after the H= remote
1422 host field, same as incoming lines. There is a separate
1423 outgoing_interface log selector which allows you to disable the
1426 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1427 If not running log_selector +smtp_connection the mainlog would be held
1428 open indefinitely after a "too many connections" event, including to a
1429 deleted file after a log rotate. Leave the per net connection logging
1430 leaving it open for efficiency as that will be quickly detected by the
1431 check on the next write.
1433 HS/01 Bug 1671: Fix post transport crash.
1434 Processing the wait-<transport> messages could crash the delivery
1435 process if the message IDs didn't exist for some reason. When
1436 using 'split_spool_directory=yes' the construction of the spool
1437 file name failed already, exposing the same netto behaviour.
1439 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1440 mime_regex ACL conditions.
1442 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1443 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1444 to HELO, local diagnostic string.
1446 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1447 log line to debug. Even when configured with a tls authenticator many
1448 client connections are expected to not authenticate in this way, so
1449 an authenticate fail is not an error.
1451 HS/02 Add the Exim version string to the process info. This way exiwhat
1452 gives some more detail about the running daemon.
1454 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1455 matter for fast-change records such as DNSBLs.
1457 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1458 retry record, even if constant. There may be multiple transports with
1459 different interface settings and the retry behaviour needs to be kept
1462 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1464 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1466 JH/10 Bug 840: fix log_defer_output option of pipe transport
1468 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1469 hosts_randomize. This matters a lot when combined with mua_wrapper.
1471 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1472 ${quote_pgsql:<string>} operator.
1474 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1476 JH/14 Change header file name for freeradius-client. Relevant if compiling
1477 with Radius support; from the Gentoo tree and checked under Fedora.
1479 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1481 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1482 option transport_filter, meaning no filtering.
1484 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1486 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1487 defaults to "*" (all hosts). The variable is now available when not built
1488 with TLS, default unset, mainly to enable keeping the testsuite sane.
1489 If a server certificate is not supplied (via tls_certificate) an error is
1490 logged, and clients will find TLS connections fail on startup. Presumably
1491 they will retry in-clear.
1492 Packagers of Exim are strongly encouraged to create a server certificate
1493 at installation time.
1495 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1496 with the $config_file variable.
1498 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1499 in transport context, after the attempt, and per-recipient. The latter type
1500 is per host attempted. The event data is the error message, and the errno
1501 information encodes the lookup type (A vs. MX) used for the (first) host,
1502 and the trailing two digits of the smtp 4xx response.
1504 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1505 to write to mainlog (or rejectlog, paniclog) in the window between file
1506 creation and permissions/ownership being changed. Particularly affects
1507 installations where exicyclog is run as root, rather than exim user;
1508 result is that the running daemon panics and dies.
1510 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1512 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1513 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1514 "pri" and "weight". Note that the previous implicit priority given by the
1515 list order is no longer honoured.
1517 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1518 for DKIM processing.
1520 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1521 by defining SUPPORT_SOCKS.
1523 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1524 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1525 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1526 variables are renamed to proxy_{local,external}_{address,port}.
1528 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1529 for a build by defining SUPPORT_I18N
1531 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1532 of the query string, and make ${quote_redis:} do that quoting.
1534 JH/29 Move Events support from Experimental to mainline, enabled by default
1535 and removable for a build by defining DISABLE_EVENT.
1537 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1539 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1540 cached by the daemon.
1542 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1543 by defining LOOKUP_REDIS. The libhiredis library is required.
1545 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1546 keys are given for lookup.
1548 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1549 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1550 only supported when built with TLS support. The PolarSSL SHA routines
1551 are still used when the TLS library is too old for convenient support.
1553 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1554 openssl_options), for security. OpenSSL forces this from version 1.1.0
1555 server-side so match that on older versions.
1557 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1558 allocation for $value could be released as the expansion processing
1559 concluded, but leaving the global pointer active for it.
1561 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1562 and to use the domains and local_parts ACL conditions.
1564 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1565 incorrectly not doubled on cutthrough transmission, hence seen as a
1566 body-termination at the receiving system - resulting in truncated mails.
1567 Commonly the sender saw a TCP-level error, and retransmitted the message
1568 via the normal store-and-forward channel. This could result in duplicates
1569 received - but deduplicating mailstores were liable to retain only the
1570 initial truncated version.
1572 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1574 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1576 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1577 we're in there, support oversigning also; bug 1309.
1579 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1581 HS/04 Add support for keep_environment and add_environment options.
1583 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1584 either intentional arithmetic overflow during PRNG, or testing config-
1587 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1588 delivery resulted in actual delivery. Cancel cutthrough before DATA
1591 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1592 rejects a recipient: pass the reject to the originator.
1594 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1595 Many were false-positives and ignorable, but it's worth fixing the
1598 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1599 for the new environment-manipulation done at startup. Move the routines
1600 from being local to tls.c to being global via the os.c file.
1602 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1603 an extract embedded as result-arg for a map, the first arg for extract
1604 is unavailable so we cannot tell if this is a numbered or keyed
1605 extraction. Accept either.
1611 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1614 JH/02 The smtp transport option "multi_domain" is now expanded.
1616 JH/03 The smtp transport now requests PRDR by default, if the server offers
1619 JH/04 Certificate name checking on server certificates, when exim is a client,
1620 is now done by default. The transport option tls_verify_cert_hostnames
1621 can be used to disable this per-host. The build option
1622 EXPERIMENTAL_CERTNAMES is withdrawn.
1624 JH/05 The value of the tls_verify_certificates smtp transport and main options
1625 default to the word "system" to access the system default CA bundle.
1626 For GnuTLS, only version 3.0.20 or later.
1628 JH/06 Verification of the server certificate for a TLS connection is now tried
1629 (but not required) by default. The verification status is now logged by
1630 default, for both outbound TLS and client-certificate supplying inbound
1633 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1636 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1637 Status Notification (bounce) messages are now MIME format per RFC 3464.
1638 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1639 under the control of the dsn_advertise_hosts option, and routers may
1640 have a dsn_lasthop option.
1642 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1643 default, modifiable by a malware= option. The list separator for
1644 the options can now be changed in the usual way. Bug 68.
1646 JH/10 The smtp_receive_timeout main option is now expanded before use.
1648 JH/11 The incoming_interface log option now also enables logging of the
1649 local interface on delivery outgoing connections.
1651 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1652 if the interface and destination host and port all match.
1654 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1657 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1658 Patch from Andrew Lewis.
1660 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1661 now supports optional time-restrictions, weighting, and priority
1662 modifiers per server. Patch originally by <rommer@active.by>.
1664 JH/16 The spamd_address main option now supports a mixed list of local
1665 and remote servers. Remote servers can be IPv6 addresses, and
1666 specify a port-range.
1668 JH/17 Bug 68: The spamd_address main option now supports an optional
1669 timeout value per server.
1671 JH/18 Bug 1581: Router and transport options headers_add/remove can
1672 now have the list separator specified.
1674 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1677 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1680 JH/21 Support for the A6 type of dns record is withdrawn.
1682 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1683 rather than the verbs used.
1685 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1686 from 255 to 1024 chars.
1688 JH/24 Verification callouts now attempt to use TLS by default.
1690 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1691 are generic router options now. The defaults didn't change.
1693 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1694 Original patch from Alexander Shikoff, worked over by JH.
1696 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1697 files if ZCAT_COMMAND is not executable.
1699 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1701 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1703 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1704 Normally benign, it bites when the pair was led to by a CNAME;
1705 modern usage is to not canonicalize the domain to a CNAME target
1706 (and we were inconsistent anyway for A-only vs AAAA+A).
1708 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1710 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1711 when evaluating $sender_host_dnssec.
1713 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1714 $sender_helo_dnssec variable.
1716 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1718 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1720 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1722 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1723 documented as working, but never had. Support all but $spam_report.
1725 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1726 added for tls authenticator.
1728 HS/03 Add perl_taintmode main config option
1734 TL/01 When running the test suite, the README says that variables such as
1735 no_msglog_check are global and can be placed anywhere in a specific
1736 test's script, however it was observed that placement needed to be near
1737 the beginning for it to behave that way. Changed the runtest perl
1738 script to read through the entire script once to detect and set these
1739 variables, reset to the beginning of the script, and then run through
1740 the script parsing/test process like normal.
1742 TL/02 The BSD's have an arc4random API. One of the functions to induce
1743 adding randomness was arc4random_stir(), but it has been removed in
1744 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1745 function when detected.
1747 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1748 cause callback expansion.
1750 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1751 syntax errors in an expansion can be treated as a string instead of
1752 logging or causing an error, due to the internal use of bool_lax
1753 instead of bool when processing it.
1755 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1756 server certificates when making smtp deliveries.
1758 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1760 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1762 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1764 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1765 Merged patch from Sebastian Wiedenroth.
1767 JH/05 Fix results-pipe from transport process. Several recipients, combined
1768 with certificate use, exposed issues where response data items split
1769 over buffer boundaries were not parsed properly. This eventually
1770 resulted in duplicates being sent. This issue only became common enough
1771 to notice due to the introduction of connection certificate information,
1772 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1774 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1775 size buffer was used, resulting in syntax errors when an expansion
1778 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1779 version 3.3.6 or later.
1781 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1782 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1783 both become "event_action", the variables become $event_name, $event_data
1784 and $event_defer_errno. There is a new variable $verify_mode, usable in
1785 routers, transports and related events. The tls:cert event is now also
1786 raised for inbound connections, if the main configuration event_action
1789 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1790 early OCSP support, but no stapling (appears to be less than 1.0.0).
1792 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1793 server certificate names available under the smtp transport option
1794 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1797 JH/10 Time-related extraction expansions from certificates now use the main
1798 option "timezone" setting for output formatting, and are consistent
1799 between OpenSSL and GnuTLS compilations. Bug 1541.
1801 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1802 encoded parameter in the incoming message. Bug 1558.
1804 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1805 include certificate info, eximon was claiming there were spoolfile
1808 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1810 JH/14 Log delivery-related information more consistently, using the sequence
1811 "H=<name> [<ip>]" wherever possible.
1813 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1814 are problematic for Debian distribution, omit them from the release
1817 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1819 JH/16 Fix string representation of time values on 64bit time_t architectures.
1822 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1823 output list separator was used.
1828 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1829 checkers that were complaining about end of non-void function with no
1832 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1833 This was a regression introduced in 4.83 by another bugfix.
1835 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1837 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1838 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1844 TF/01 Correctly close the server side of TLS when forking for delivery.
1846 When a message was received over SMTP with TLS, Exim failed to clear up
1847 the incoming connection properly after forking off the child process to
1848 deliver the message. In some situations the subsequent outgoing
1849 delivery connection happened to have the same fd number as the incoming
1850 connection previously had. Exim would try to use TLS and fail, logging
1851 a "Bad file descriptor" error.
1853 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1854 utilities have not been installed.
1856 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1857 temporary space as the ACL may create new global variables.
1859 TL/01 LDAP support uses per connection or global context settings, depending
1860 upon the detected version of the libraries at build time.
1862 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1863 to extract and use the src ip:port in logging and expansions as if it
1864 were a direct connection from the outside internet. PPv2 support was
1865 updated based on HAProxy spec change in May 2014.
1867 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1869 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1870 Properly escape header and check for NULL return.
1872 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1875 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1877 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1878 characters in header names, implemented as a verify condition.
1879 Contributed by Michael Fischer v. Mollard.
1881 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1882 results permerror and temperror. Previous values are deprecated but
1883 still accepted. In a future release, err_perm and err_temp will be
1884 completely removed, which will be a backward incompatibility if the
1885 ACL tests for either of these two old results. Patch contributed by
1886 user bes-internal on the mailing list.
1888 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1890 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1891 selectors, in both main and reject logs.
1893 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1896 JH/07 Add malware type "sock" for talking to simple daemon.
1898 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1900 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1901 routers/transports under cutthrough routing.
1903 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1904 numbers. Touch up "bool" conditional to keep the same definition.
1906 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1908 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1910 JH/12 Expand items in router/transport headers_add or headers_remove lists
1911 individually rather than the list as a whole. Bug 1452.
1913 Required for reasonable handling of multiple headers_ options when
1914 they may be empty; requires that headers_remove items with embedded
1915 colons must have them doubled (or the list-separator changed).
1917 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1918 view the policy declared in the DMARC record. Currently, $dmarc_status
1919 is a combined value of both the record presence and the result of the
1922 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1924 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1925 dnslookup router and the smtp transport (applying to the forward
1928 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1929 of ldap servers used for a specific lookup. Patch provided by Heiko
1932 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1933 New variable $lookup_dnssec_authenticated for observability.
1935 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1936 Patch submitted by Lars Timman.
1938 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1940 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1941 Requires trusted mode and valid format message id, aborts otherwise.
1942 Patch contributed by Heiko Schlichting.
1944 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1945 certextract with support for various fields. Bug 1358.
1947 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1948 is requested by default, modifiable by smtp transport option
1951 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1952 operate on certificate variables to give certificate fingerprints
1953 Also new ${sha256:cert_variable}.
1955 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1957 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1958 Christian Aistleitner.
1960 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1962 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1963 file. Patch from Wolfgang Breyha.
1965 JH/25 Expand the coverage of the delivery $host and $host_address to
1966 client authenticators run in verify callout. Bug 1476.
1968 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1969 align with daemon_smtp_ports. Bug 72.
1971 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1972 support and error reporting did not work properly.
1974 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1975 and is readable. Patch from Andrew Colin Kissa.
1977 TL/14 Enhance documentation of ${run expansion and how it parses the
1978 commandline after expansion, particularly in the case when an
1979 unquoted variable expansion results in an empty value.
1981 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1983 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1984 by renaming away from it. Addresses GH issue 15, reported by
1987 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1989 TL/15 SECURITY: prevent double expansion in math comparison functions
1990 (can expand unsanitized data). Not remotely exploitable.
1997 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1999 PP/02 Make -n do something, by making it not do something.
2000 When combined with -bP, the name of an option is not output.
2002 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2005 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2006 $sender_host_name and config options to manage this, and basic check
2009 PP/05 DSCP support for outbound connections and control modifier for inbound.
2011 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2012 (Only plugin which currently uses this is kerberos4, which nobody should
2013 be using, but we should make it available and other future plugins might
2014 conceivably use it, even though it would break NAT; stuff *should* be
2015 using channel bindings instead).
2017 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2018 name; added for Sendmail compatibility; requires admin caller.
2019 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2020 just ignore it); requires trusted caller.
2021 Also parse but ignore: -Ac -Am -X<logfile>
2024 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2026 TL/02 Add +smtp_confirmation as a default logging option.
2028 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2029 Patch by Magnus Holmgren from 2007-02-20.
2031 TL/04 Bugzilla 1281 - Spec typo.
2032 Bugzilla 1283 - Spec typo.
2033 Bugzilla 1290 - Spec grammar fixes.
2035 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2037 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2039 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2040 mailing list by by Dmitry Isaikin.
2042 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2044 JH/02 Support "G" suffix to numbers in ${if comparisons.
2046 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2048 NM/01 Bugzilla 1197 - Spec typo
2049 Bugzilla 1196 - Spec examples corrections
2051 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2053 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2054 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2057 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2058 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2060 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2061 "acl {{name}{arg}...}", and optional args on acl condition
2064 JH/05 Permit multiple router/transport headers_add/remove lines.
2066 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2068 JH/07 Avoid using a waiting database for a single-message-only transport.
2069 Performance patch from Paul Fisher. Bugzilla 1262.
2071 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2074 JH/09 Add $headers_added variable, with content from use of ACL modifier
2075 add_header (but not yet added to the message). Bugzilla 199.
2077 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2078 Pulled from Bugzilla 817 by Wolfgang Breyha.
2080 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2082 (nb: this is the same fix as in Exim 4.80.1)
2084 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2087 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2090 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2092 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2093 advertise SMTP AUTH mechanism to us, instead of a generic
2094 protocol violation error. Also, make Exim more robust to bad
2095 data from the Dovecot auth socket.
2097 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2099 When a queue runner is handling a message, Exim first routes the
2100 recipient addresses, during which it prunes them based on the retry
2101 hints database. After that it attempts to deliver the message to
2102 any remaining recipients. It then updates the hints database using
2105 So if a recipient address works intermittently, it can get repeatedly
2106 deferred at routing time. The retry hints record remains fresh so the
2107 address never reaches the final cutoff time.
2109 This is a fairly common occurrence when a user is bumping up against
2110 their storage quota. Exim had some logic in its local delivery code
2111 to deal with this. However it did not apply to per-recipient defers
2112 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2114 This change adds a proper retry rule check during routing so that the
2115 final cutoff time is checked against the message's age. We only do
2116 this check if there is an address retry record and there is not a
2117 domain retry record; this implies that previous attempts to handle
2118 the address had the retry_use_local_parts option turned on. We use
2119 this as an approximation for the destination being like a local
2120 delivery, as in LMTP.
2122 I suspect this new check makes the old local delivery cutoff check
2123 redundant, but I have not verified this so I left the code in place.
2125 TF/02 Correct gecos expansion when From: is a prefix of the username.
2127 Test 0254 submits a message to Exim with the header
2131 When I ran the test suite under the user fanf2, Exim expanded
2132 the header to contain my full name, whereas it should have added
2133 a Resent-Sender: header. It erroneously treats any prefix of the
2134 username as equal to the username.
2136 This change corrects that bug.
2138 GF/01 DCC debug and logging tidyup
2139 Error conditions log to paniclog rather than rejectlog.
2140 Debug lines prefixed by "DCC: " to remove any ambiguity.
2142 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2144 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2145 Bug spotted by Jeremy Harris; was flawed since initial commit.
2146 Would have resulted in OCSP responses post-SNI triggering an Exim
2147 NULL dereference and crash.
2149 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2151 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2152 Bug detection, analysis and fix by Samuel Thibault.
2153 Bugzilla 1331, Debian bug #698092.
2155 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2157 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2158 Server implementation by Todd Lyons, client by JH.
2159 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2160 config variable "prdr_enable" controls whether the server
2161 advertises the facility. If the client requests PRDR a new
2162 acl_data_smtp_prdr ACL is called once for each recipient, after
2163 the body content is received and before the acl_smtp_data ACL.
2164 The client is controlled by both of: a hosts_try_prdr option
2165 on the smtp transport, and the server advertisement.
2166 Default client logging of deliveries and rejections involving
2167 PRDR are flagged with the string "PRDR".
2169 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2170 fclose(). Diagnosis by Todd Lyons.
2172 PP/17 Update configure.default to handle IPv6 localhost better.
2173 Patch by Alain Williams (plus minor tweaks).
2176 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2177 This is now consistent with GnuTLS, and is now documented: the
2178 previous undocumented portable approach to treating the option as
2179 unset was to force an expansion failure. That still works, and
2180 an empty string is now equivalent.
2182 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2183 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2184 not performing validation itself.
2186 PP/20 Added force_command boolean option to pipe transport.
2187 Patch from Nick Koston, of cPanel Inc.
2189 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2192 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2194 PP/21 Fix eximon continuous updating with timestamped log-files.
2195 Broken in a format-string cleanup in 4.80, missed when I repaired the
2196 other false fix of the same issue.
2197 Report and fix from Heiko Schlichting.
2200 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2201 Report from Prashanth Katuri.
2203 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2204 It's SecureTransport, so affects any MacOS clients which use the
2205 system-integrated TLS libraries, including email clients.
2207 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2208 using a MIME ACL for non-SMTP local injection.
2209 Report and assistance in diagnosis by Warren Baker.
2211 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2213 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2215 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2216 last id that failed so it may be referenced in subsequent ACL's.
2218 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2221 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2222 ldap library initialization, allowing self-signed CA's to be
2223 used. Also properly sets require_cert option later in code by
2224 using NULL (global ldap config) instead of ldap handle (per
2225 session). Bug diagnosis and testing by alxgomz.
2227 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2228 the src/util/ subdirectory.
2230 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2231 renamed to Transport Post Delivery Action by Jeremy Harris, as
2234 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2235 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2236 redis_servers = needs to be configured which will be used by the redis
2237 lookup. Patch from Warren Baker, of The Packet Hub.
2239 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2241 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2242 hostname or reverse DNS when processing a host list. Used suggestions
2243 from multiple comments on this bug.
2245 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2247 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2248 Missed a few lines, added it to make the runtest require no keyboard
2251 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2252 contains upper case chars. Make router use caseful_local_part.
2254 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2255 support when GnuTLS has been built with p11-kit.
2261 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2263 This, or similar/improved, will also be change PP/11 of 4.82.
2269 PP/01 Handle short writes when writing local log-files.
2270 In practice, only affects FreeBSD (8 onwards).
2271 Bugzilla 1053, with thanks to Dmitry Isaikin.
2273 NM/01 Bugzilla 949 - Documentation tweak
2275 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2278 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2280 PP/02 Implemented gsasl authenticator.
2282 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2284 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2285 `pkg-config foo` for cflags/libs.
2287 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2288 with rest of GSASL and with heimdal_gssapi.
2290 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2291 `pkg-config foo` for cflags/libs for the TLS implementation.
2293 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2294 properties get this fed in as external SSF. A number of robustness
2295 and debugging improvements to the cyrus_sasl authenticator.
2297 PP/08 cyrus_sasl server now expands the server_realm option.
2299 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2300 Patch by Jeremy Harris.
2302 PP/10 Added dbmjz lookup type.
2304 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2306 PP/12 MAIL args handles TAB as well as SP, for better interop with
2307 non-compliant senders.
2308 Analysis and variant patch by Todd Lyons.
2310 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2311 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2312 Patch from Dirk Mueller <dmueller@suse.com>
2314 PP/13 tls_peerdn now print-escaped for spool files.
2315 Observed some $tls_peerdn in wild which contained \n, which resulted
2316 in spool file corruption.
2318 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2319 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2320 or write after TLS renegotiation, which otherwise led to messages
2323 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2324 as a tracking header (ie: a signed header comes before the signature).
2325 Patch from Wolfgang Breyha.
2327 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2328 comma-sep list; embedded commas doubled.
2330 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2332 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2334 Report and patch from Dmitry Banschikov.
2336 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2337 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2338 failures. We appear to now support TLS1.1+ with Exim.
2340 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2341 lets Exim select keys and certificates based upon TLS SNI from client.
2342 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2343 before an outbound SMTP session. New log_selector, +tls_sni.
2345 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2346 NULL dereference. Report and patch from Alun Jones.
2348 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2349 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2350 Not seeing resolver debug output on NetBSD, but suspect this is a
2351 resolver implementation change.
2353 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2354 Left warnings. Added "eximon gdb" invocation mode.
2356 PP/21 Defaulting "accept_8bitmime" to true, not false.
2358 PP/22 Added -bw for inetd wait mode support.
2360 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2361 locate the relevant includes and libraries. Made this the default.
2363 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2364 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2366 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2367 This may cause build issues on older platforms.
2369 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2370 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2371 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2372 Added SNI support via GnuTLS too.
2373 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2375 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2377 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2378 Applied second patch from Janne, implementing suggestion to default
2379 multiple-strings-in-record handling to match SPF spec.
2381 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2383 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2384 read-only, out of scope).
2385 Patch from Wolfgang Breyha, report from Stuart Northfield.
2387 PP/29 Fix three issues highlighted by clang analyser static analysis.
2388 Only crash-plausible issue would require the Cambridge-specific
2389 iplookup router and a misconfiguration.
2390 Report from Marcin Mirosław.
2392 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2394 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2395 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2396 As part of this, removing so much warning spew let me fix some minor
2397 real issues in debug logging.
2399 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2400 assignment on my part. Fixed.
2402 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2403 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2404 Janne Snabb (who went above and beyond: thank you).
2406 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2407 string otherwise requires a connection and a bunch more work and it's
2408 relatively easy to get wrong. Should also expose TLS library linkage
2411 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2412 64-bit ${eval} (JH/03).
2414 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2415 GNU libc to support some of the 64-bit stuff, should not lead to
2416 conflicts. Defined before os.h is pulled in, so if a given platform
2417 needs to override this, it can.
2419 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2420 protection layer was required, which is not implemented.
2421 Bugzilla 1254, patch from Wolfgang Breyha.
2423 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2424 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2425 tls_dhparam take prime identifiers. Also unbreak combination of
2426 OpenSSL+DH_params+TLSSNI.
2428 PP/39 Disable SSLv2 by default in OpenSSL support.
2434 PP/01 Solaris build fix for Oracle's LDAP libraries.
2435 Bugzilla 1109, patch from Stephen Usher.
2437 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2439 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2442 TF/02 Fix a couple more cases where we did not log the error message
2443 when unlink() failed. See also change 4.74-TF/03.
2445 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2446 lock up or crash if it happened to be inside a call to libc when it
2447 got a SIGUSR1 from exiwhat.
2449 The SIGUSR1 handler appends the current process status to the process
2450 log which is later printed by exiwhat. It used to use the general
2451 purpose logging code to do this, but several functions it calls are
2452 not safe for signals.
2454 The new output code in the SIGUSR1 handler is specific to the process
2455 log, and simple enough that it's easy to inspect for signal safety.
2456 Removing some special cases also simplifies the general logging code.
2457 Removing the spurious timestamps from the process log simplifies
2460 TF/04 Improved ratelimit ACL condition.
2462 The /noupdate option has been deprecated in favour of /readonly which
2463 has clearer semantics. The /leaky, /strict, and /readonly update modes
2464 are mutually exclusive. The update mode is no longer included in the
2465 database key; it just determines when the database is updated. (This
2466 means that when you upgrade Exim will forget old rate measurements.)
2468 Exim now checks that the per_* options are used with an update mode that
2469 makes sense for the current ACL. For example, when Exim is processing a
2470 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2471 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2472 must specify per_mail/readonly. If you omit the update mode it defaults to
2473 /leaky where that makes sense (as before) or /readonly where required.
2475 The /noupdate option is now undocumented but still supported for
2476 backwards compatibility. It is equivalent to /readonly except that in
2477 ACLs where /readonly is required you may specify /leaky/noupdate or
2478 /strict/noupdate which are treated the same as /readonly.
2480 A useful new feature is the /count= option. This is a generalization
2481 of the per_byte option, so that you can measure the throughput of other
2482 aggregate values. For example, the per_byte option is now equivalent
2483 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2485 The per_rcpt option has been generalized using the /count= mechanism
2486 (though it's more complicated than the per_byte equivalence). When it is
2487 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2488 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2489 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2490 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2491 Note that using per_rcpt with a non-readonly update mode in more than
2492 one ACL will cause the recipients to be double-counted. (The per_mail
2493 and per_byte options don't have this problem.)
2495 The handling of very low rates has changed slightly. If the computed rate
2496 is less than the event's count (usually one) then this event is the first
2497 after a long gap. In this case the rate is set to the same as this event's
2498 count, so that the first message of a spam run is counted properly.
2500 The major new feature is a mechanism for counting the rate of unique
2501 events. The new per_addr option counts the number of different
2502 recipients that someone has sent messages to in the last time period. It
2503 behaves like per_rcpt if all the recipient addresses are different, but
2504 duplicate recipient addresses do not increase the measured rate. Like
2505 the /count= option this is a general mechanism, so the per_addr option
2506 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2507 example, measure the rate that a client uses different sender addresses
2508 with the options per_mail/unique=$sender_address. There are further
2509 details in the main documentation.
2511 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2513 TF/06 Removed a few PCRE remnants.
2515 TF/07 Automatically extract Exim's version number from tags in the git
2516 repository when doing development or release builds.
2518 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2519 Bugzilla 879. Patch from Paul Fisher.
2521 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2522 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2525 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2527 PP/05 Variable $av_failed, true if the AV scanner deferred.
2528 Bugzilla 1078. Patch from John Horne.
2530 PP/06 Stop make process more reliably on build failure.
2531 Bugzilla 1087. Patch from Heiko Schlittermann.
2533 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2534 Bugzilla 1089. Patch from Heiko Schlittermann.
2536 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2537 Bugzilla 1131. Patch from Holger Weiß.
2539 PP/09 Handle IPv6 addresses with SPF.
2540 Bugzilla 860. Patch from Wolfgang Breyha.
2542 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2544 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2547 PP/11 match_* no longer expand right-hand-side by default.
2548 New compile-time build option, EXPAND_LISTMATCH_RHS.
2549 New expansion conditions, "inlist", "inlisti".
2551 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2553 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2555 PP/14 fix log_write() format string regression from TF/03.
2556 Bugzilla 1152. Patch from Dmitry Isaikin.
2562 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2564 PP/02 Harmonised TLS library version reporting; only show if debugging.
2565 Layout now matches that introduced for other libraries in 4.74 PP/03.
2567 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2569 PP/04 New "dns_use_edns0" global option.
2571 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2574 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2575 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2577 TK/01 Updated PolarSSL code to 0.14.2.
2578 Bugzilla 1097. Patch from Andreas Metzler.
2580 PP/07 Catch divide-by-zero in ${eval:...}.
2581 Fixes bugzilla 1102.
2583 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2586 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2587 format-string attack -- SECURITY: remote arbitrary code execution.
2589 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2590 time unintentionally subject to list matching rules, letting the header
2591 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2592 arbitrary string expansion). This allowed for information disclosure.
2594 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2595 INT_MIN/-1 -- value coerced to INT_MAX.
2601 NM/01 Workaround for PCRE version dependency in version reporting
2604 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2605 This fixes portability to compilers other than gcc, notably
2606 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2608 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2609 makefiles for portability to HP-UX and POSIX correctness.
2611 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2612 Also via indented variable definition in the Makefile.
2613 (Debugging by Oliver Heesakkers).
2615 PP/02 Restore caching of spamd results with expanded spamd_address.
2616 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2618 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2619 Improves build reliability. Fix from: Frank Elsner
2621 NM/02 Fix wide character breakage in the rfc2047 coding
2622 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2624 NM/03 Allow underscore in dnslist lookups
2625 Fixes bug 1026. Patch from Graeme Fowler
2627 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2628 Code patches from Adam Ciarcinski of NetBSD.
2630 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2633 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2634 is logged, to avoid truncation. Patch from John Horne.
2636 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2637 Patch from Jakob Hirsch.
2639 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2640 SQL string expansion failure details.
2641 Patch from Andrey Oktyabrski.
2643 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2644 Patch from Simon Arlott.
2646 PP/09 New lookups functionality failed to compile on old gcc which rejects
2647 extern declarations in function scope.
2648 Patch from Oliver Fleischmann
2650 PP/10 Use sig_atomic_t for flags set from signal handlers.
2651 Check getgroups() return and improve debugging.
2652 Fixed developed for diagnosis in bug 927 (which turned out to be
2655 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2656 Patch from Mark Zealey.
2658 PP/12 Bugzilla 1056: Improved spamd server selection.
2659 Patch from Mark Zealey.
2661 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2662 Based on patch from Heiko Schlittermann.
2664 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2665 Patch from Uwe Doering, sign-off by Michael Haardt.
2667 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2668 variable declaration deep within a block. Bug and patch from
2671 PP/15 lookups-Makefile IRIX compatibility coercion.
2673 PP/16 Make DISABLE_DKIM build knob functional.
2675 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2676 Patch by Simon Arlott
2678 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2679 variable argument macros. Our copy now differs from upstream.
2685 TF/01 Failure to get a lock on a hints database can have serious
2686 consequences so log it to the panic log.
2688 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2689 controlled using the smtp_confirmation log selector.
2691 TF/03 Include the error message when we fail to unlink a spool file.
2693 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2694 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2695 for maintaining out-of-tree patches for some time.
2697 PP/01 Bugzilla 139: Documentation and portability issues.
2698 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2699 Handle per-OS dynamic-module compilation flags.
2701 PP/02 Let /dev/null have normal permissions.
2702 The 4.73 fixes were a little too stringent and complained about the
2703 permissions on /dev/null. Exempt it from some checks.
2704 Reported by Andreas M. Kirchwitz.
2706 PP/03 Report version information for many libraries, including
2707 Exim version information for dynamically loaded libraries. Created
2708 version.h, now support a version extension string for distributors
2709 who patch heavily. Dynamic module ABI change.
2711 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2712 privilege escalation vulnerability whereby the Exim run-time user
2713 can cause root to append content of the attacker's choosing to
2716 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2719 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2720 If dropping privileges for untrusted macros, we disabled normal logging
2721 on the basis that it would fail; for the Exim run-time user, this is not
2722 the case, and it resulted in successful deliveries going unlogged.
2723 Fixed. Reported by Andreas Metzler.
2729 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2730 only prepend for the Resent-* case. Fixes regression introduced in
2731 Exim 4.70 by NM/22 for Bugzilla 607.
2733 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2734 increasing numbers of administrators be bitten by this.
2736 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2738 PP/03 Bugzilla 994: added openssl_options main configuration option.
2740 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2742 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2744 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2746 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2747 without a peer certificate, leading to a segfault because of an
2748 assumption that peers always have certificates. Be a little more
2749 paranoid. Problem reported by Martin Tscholak.
2751 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2752 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2753 NB: ClamAV planning to remove STREAM in "middle of 2010".
2754 CL also introduces -bmalware, various -d+acl logging additions and
2755 more caution in buffer sizes.
2757 PP/09 Implemented reverse_ip expansion operator.
2759 PP/10 Bugzilla 937: provide a "debug" ACL control.
2761 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2763 PP/12 Bugzilla 973: Implement --version.
2765 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2767 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2769 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2771 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2772 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2773 ignore trailing whitespace.
2775 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2777 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2780 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2781 Notification from Dr Andrew Aitchison.
2783 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2784 ExtendedDetectionInfo response format.
2785 Notification from John Horne.
2787 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2790 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2791 XSL and documented dependency on system catalogs, with examples of how
2794 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2797 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2798 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2799 configuration file which is writeable by the Exim user or group.
2801 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2802 of configuration files to cover files specified with the -C option if
2803 they are going to be used with root privileges, not just the default
2806 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2807 option (effectively making it always true).
2809 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2810 files to be used while preserving root privileges.
2812 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2813 that rogue child processes cannot use them.
2815 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2816 run-time user, instead of root.
2818 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2819 Exim run-time user without dropping privileges.
2821 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2822 result string, instead of calling string_vformat() twice with the same
2825 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2826 for other users. Others should always drop root privileges if they use
2827 -C on the command line, even for a whitelisted configure file.
2829 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2831 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2837 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2838 $data_path, and $header_path variables; fixed documentation bugs and
2841 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2842 exipick to access non-standard spools, including the "frozen" queue
2845 NM/01 Bugzilla 965: Support mysql stored procedures.
2846 Patch from Alain Williams
2848 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2850 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2851 Patch from Andreas Metzler
2853 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2854 Patch from Kirill Miazine
2856 NM/05 Bugzilla 671: Added umask to procmail example.
2858 JJ/03 installed exipick 20100323.0, fixing doc bug
2860 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2861 directory. Notification and patch from Dan Rosenberg.
2863 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2865 TK/02 Improve log output when DKIM signing operation fails.
2867 MH/01 Treat the transport option dkim_domain as a colon separated
2868 list, not as a single string, and sign the message with each element,
2869 omitting multiple occurences of the same signer.
2871 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2872 Bugzilla 985, 986. Patch by Simon Arlott
2874 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2875 Patch by Simon Arlott
2877 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2878 MBX locking. Notification from Dan Rosenberg.
2884 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2886 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2888 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2890 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2892 NM/04 Bugzilla 915: Flag broken perl installation during build.
2898 TK/01 Added patch by Johannes Berg that expands the main option
2899 "spamd_address" if it starts with a dollar sign.
2901 TK/02 Write list of recipients to X-Envelope-Sender header when building
2902 the mbox-format spool file for content scanning (suggested by Jakob
2905 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2906 (http://www.dcc-servers.net/) support via dccifd. Activated by
2907 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2909 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2910 by Mark Daniel Reidel <mr@df.eu>.
2912 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2913 When building exim an external PCRE library is now needed -
2914 PCRE is a system library on the majority of modern systems.
2915 See entry on PCRE_LIBS in EDITME file.
2917 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2918 conversation. Added nologin parameter to request.
2919 Patch contributed by Kirill Miazine.
2921 TF/01 Do not log submission mode rewrites if they do not change the address.
2923 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2925 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2926 log files in place. Contributed by Roberto Lima.
2928 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2930 TF/03 Bugzilla 615: When checking the local_parts router precondition
2931 after a local_part_suffix or local_part_prefix option, Exim now
2932 does not use the address's named list lookup cache, since this
2933 contains cached lookups for the whole local part.
2935 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2936 Robert Millan. Documentation is in experimental-spec.txt.
2938 TF/04 Bugzilla 668: Fix parallel build (make -j).
2940 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2942 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2943 Patch provided by Jan Srzednicki.
2945 TF/05 Leading white space used to be stripped from $spam_report which
2946 wrecked the formatting. Now it is preserved.
2948 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2949 that they are available at delivery time.
2951 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2953 TF/08 TLS error reporting now respects the incoming_interface and
2954 incoming_port log selectors.
2956 TF/09 Produce a more useful error message if an SMTP transport's hosts
2957 setting expands to an empty string.
2959 NM/06 Bugzilla 744: EXPN did not work under TLS.
2960 Patch provided by Phil Pennock.
2962 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2963 Patch provided by Richard Godbee.
2965 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2966 acl_smtp_notquit, added index entry.
2968 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2969 Patch provided by Eugene Bujak.
2971 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2972 accept(). Patch provided by Maxim Dounin.
2974 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2975 Patch provided by Phil Pennock.
2977 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2979 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2980 Patch provided by Brad "anomie" Jorsch.
2982 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2983 Patch provided by Dean Brooks.
2985 TK/05 Add native DKIM support (does not depend on external libraries).
2987 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2988 Patch provided by Graeme Fowler.
2990 NM/16 Bugzilla 851: Documentation example syntax fix.
2992 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2994 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2997 NM/19 Bugzilla 745: TLS version reporting.
2998 Patch provided by Phil Pennock.
3000 NM/20 Bugzilla 167: bool: condition support.
3001 Patch provided by Phil Pennock.
3003 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3004 clients. Patch provided by Phil Pennock.
3006 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3007 Patch provided by Brad "anomie" Jorsch.
3009 NM/23 Bugzilla 687: Fix misparses in eximstats.
3010 Patch provided by Heiko Schlittermann.
3012 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3013 Patch provided by Heiko Schlittermann.
3015 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3016 plus update to original patch.
3018 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3020 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3021 Patch provided by David Brownlee.
3023 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3025 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3027 NM/30 Bugzilla 888: TLS documentation bugfixes.
3029 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3031 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3032 Unlike the original bugzilla I have changed all shell scripts in src tree.
3034 NM/33 Bugzilla 898: Transport filter timeout fix.
3035 Patch by Todd Rinaldo.
3037 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3038 Patch by Serge Demonchaux.
3040 NM/35 Bugzilla 39: Base64 decode bug fixes.
3041 Patch by Jakob Hirsch.
3043 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3045 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3047 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3049 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3055 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3056 ALT-N's libdkim that I have put here:
3057 http://duncanthrax.net/exim-experimental/
3059 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3060 were called 'true' and it seems that C99 defines that as a reserved
3061 keyword to be used with 'bool' variable types. That means you could
3062 not include C99-style headers which use bools without triggering
3063 build errors in sieve.c.
3065 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3066 as mailq or other aliases. Changed the --help handling significantly
3067 to do whats expected. exim_usage() emits usage/help information.
3069 SC/01 Added the -bylocaldomain option to eximstats.
3071 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3073 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3075 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3081 PH/01 Another patch from the Sieve maintainer.
3083 PH/02 When an IPv6 address is converted to a string for single-key lookup
3084 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3085 dots are used instead of colons so that keys in lsearch files need not
3086 contain colons. This was done some time before quoting was made available
3087 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3088 (notated using the quote facility) so as to distinguish them from IPv4
3089 keys. This meant that lookups for IP addresses in host lists did not work
3090 for iplsearch lookups.
3092 This has been fixed by arranging for IPv6 addresses to be expressed with
3093 colons if the lookup type is iplsearch. This is not incompatible, because
3094 previously such lookups could never work.
3096 The situation is now rather anomalous, since one *can* have colons in
3097 ordinary lsearch keys. However, making the change in all cases is
3098 incompatible and would probably break a number of configurations.
3100 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3103 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3104 conversion specification without a maximum field width, thereby enabling
3105 a rogue spamd server to cause a buffer overflow. While nobody in their
3106 right mind would setup Exim to query an untrusted spamd server, an
3107 attacker that gains access to a server running spamd could potentially
3108 exploit this vulnerability to run arbitrary code as the Exim user.
3110 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3111 $primary_hostname instead of what libspf2 thinks the hosts name is.
3113 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3114 a directory entry by the name of the lookup key. Previously, if a
3115 symlink pointed to a non-existing file or a file in a directory that
3116 Exim lacked permissions to read, a lookup for a key matching that
3117 symlink would fail. Now it is enough that a matching directory entry
3118 exists, symlink or not. (Bugzilla 503.)
3120 PH/03 The body_linecount and body_zerocount variables are now exported in the
3123 PH/04 Added the $dnslist_matched variable.
3125 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3126 This means they are set thereafter only if the connection becomes
3129 PH/06 Added the client_condition to authenticators so that some can be skipped
3130 by clients under certain conditions.
3132 PH/07 The error message for a badly-placed control=no_multiline_responses left
3133 "_responses" off the end of the name.
3135 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3137 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3138 (without spaces) instead of just copying the configuration text.
3140 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3142 PH/11 Added $max_received_linelength.
3144 PH/12 Added +ignore_defer and +include_defer to host lists.
3146 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3147 way in which PCRE > 7.0 is built.
3149 PH/14 Implemented queue_only_load_latch.
3151 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3152 MAIL command. The effect was to mangle the value on 64-bit systems.
3154 PH/16 Another patch from the Sieve maintainer.
3156 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3158 PH/18 If a system quota error occurred while trying to create the file for
3159 a maildir delivery, the message "Mailbox is full" was not appended to the
3160 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3161 only to a quota excession during the actual writing of the file.
3163 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3164 characters?) which causes problems in log lines. The DN values are now
3165 passed through string_printing() before being added to log lines.
3167 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3168 and InterBase are left for another time.)
3170 PH/21 Added message_body_newlines option.
3172 PH/22 Guard against possible overflow in moan_check_errorcopy().
3174 PH/23 POSIX allows open() to be a macro; guard against that.
3176 PH/24 If the recipient of an error message contained an @ in the local part
3177 (suitably quoted, of course), incorrect values were put in $domain and
3178 $local_part during the evaluation of errors_copy.
3184 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3185 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3188 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3189 issue a MAIL command.
3191 PH/02 In an ACL statement such as
3193 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3195 if a client was not listed at all, or was listed with a value other than
3196 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3197 the condition was not true (as it should be), so access was not denied.
3198 The bug was that the ! inversion was incorrectly passed on to the second
3199 item. This has been fixed.
3201 PH/03 Added additional dnslists conditions == and =& which are different from
3202 = and & when the dns lookup returns more than one IP address.
3204 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3205 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3207 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3208 FSYNC, which compiles an option called disable_fsync that allows for
3209 bypassing fsync(). The documentation is heavily laced with warnings.
3211 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3213 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3214 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3215 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3216 including adding "make clean"; (3) Added -fPIC when compiling the test
3217 dynamically loaded module, to get rid of a warning.
3219 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3220 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3221 = 0s. The bug is otherwise harmless.
3223 PH/07 There was a bug in the dovecot authenticator such that the value of
3224 $auth1 could be overwritten, and so not correctly preserved, after a
3225 successful authentication. This usually meant that the value preserved by
3226 the server_setid option was incorrect.
3228 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3230 PH/09 Installed PCRE release 7.0.
3232 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3233 run for batched SMTP input. It is now run at the start of every message
3234 in the batch. While fixing this I discovered that the process information
3235 (output by running exiwhat) was not always getting set for -bs and -bS
3236 input. This is fixed, and it now also says "batched" for BSMTP.
3238 PH/11 Added control=no_pipelining.
3240 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3241 patch, slightly modified), and move the expansion of helo_data till after
3242 the connection is made in the smtp transport (so it can use these
3245 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3247 PH/14 Added log_selector = +pid.
3249 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3251 PH/16 Add ${if forany and ${if forall.
3253 PH/17 Added dsn_from option to vary the From: line in DSNs.
3255 PH/18 Flush SMTP output before performing a callout, unless control =
3256 no_callout_flush is set.
3258 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3259 was true (the default) a successful delivery failed to delete the retry
3260 item, thus causing premature timeout of the address. The bug is now
3263 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3265 PH/21 Long custom messages for fakedefer and fakereject are now split up
3266 into multiline responses in the same way that messages for "deny" and
3267 other ACL rejections are.
3269 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3270 with slight modification.
3272 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3273 draft, changing the syntax and factoring some duplicate code".
3275 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3276 for deliveries of the second and subsequent messages over the same SMTP
3279 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3280 ${reduce, with only minor "tidies".
3282 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3284 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3285 expansion side effects.
3287 PH/27 When a message times out after an over-quota error from an Exim-imposed
3288 quota, the bounce message says "mailbox is full". This message was not
3289 being given when it was a system quota that was exceeded. It now should
3292 MH/03 Made $recipients available in local_scan(). local_scan() already has
3293 better access to the recipient list through recipients_list[], but
3294 $recipients can be useful in postmaster-provided expansion strings.
3296 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3297 in the case of a MAIL command with additional options following the
3298 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3299 were accidentally chopped off.
3301 PH/29 SMTP synchronization checks are implemented when a command is read -
3302 there is a check that no more input is waiting when there shouldn't be
3303 any. However, for some commands, a delay in an ACL can mean that it is
3304 some time before the response is written. In this time, more input might
3305 arrive, invalidly. So now there are extra checks after an ACL has run for
3306 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3307 pipelining has not been advertised.
3309 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3311 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3312 returned in the SMTP response when smtp_return_error_details was false.
3313 This has been fixed.
3315 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3316 instead of the C I/O that was originally supplied, because problems were
3317 reported on Solaris.
3319 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3320 Exim which did not show up earlier: it was assuming that a call to
3321 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3322 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3323 was a macro that became an assignment, so it seemed to work. This has
3324 changed to a proper function call with a void return, hence the compile
3325 error. Exim's code has been fixed.
3327 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3330 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3332 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3334 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3335 because it turns out to be too big or there is a timeout) there is no
3336 "Completed" line in the log. When some messages of this type were
3337 selected by exigrep, they were listed as "not completed". Others were
3338 picked up by some special patterns. I have improved the selection
3339 criteria to be more general.
3341 PH/38 The host_find_failed option in the manualroute router can now be set
3342 to "ignore", to completely ignore a host whose IP address cannot be
3343 found. If all hosts are ignored, the behaviour is controlled by the new
3344 host_all_ignored option.
3346 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3347 homing or because of multiple MX records with /mx) generated more than
3348 one IP address, and the following item turned out to be the local host,
3349 all the secondary addresses of the first item were incorrectly removed
3350 from the list, along with the local host and any following hosts (which
3351 is what is supposed to happen).
3353 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3354 whoever called Exim into the -H file. In the case of the daemon it was
3355 behaving confusingly. When first started, it used values for whoever
3356 started the daemon, but after a SIGHUP it used the Exim user (because it
3357 calls itself on a restart). I have changed the code so that it now always
3360 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3361 message are rejected with the same error (e.g. no authentication or bad
3362 sender address), and a DATA command is nevertheless sent (as can happen
3363 with PIPELINING or a stupid MUA), the error message that was given to the
3364 RCPT commands is included in the rejection of the DATA command. This is
3365 intended to be helpful for MUAs that show only the final error to their
3368 PH/42 Another patch from the Sieve maintainer.
3370 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3371 Eximstats - Fixed some broken HTML links and added missing column headers
3373 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3374 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3376 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3378 PH/43 Yet another patch from the Sieve maintainer.
3380 PH/44 I found a way to check for a TCP/IP connection going away before sending
3381 the response to the final '.' that terminates a message, but only in the
3382 case where the client has not sent further data following the '.'
3383 (unfortunately, this is allowed). However, in many cases there won't be
3384 any further data because there won't be any more messages to send. A call
3385 to select() can be used: if it shows that the input is "ready", there is
3386 either input waiting, or the socket has been closed. An attempt to read
3387 the next input character can distinguish the two cases. Previously, Exim
3388 would have sent an OK response which the client would never have see.
3389 This could lead to message repetition. This fix should cure that, at
3390 least in a lot of common cases.
3392 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3393 advertised in response to EHLO.
3399 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3400 fixed by 4.65/MH/01 (is this a record?) are fixed:
3402 (i) An empty string was always treated as zero by the numeric comparison
3403 operators. This behaviour has been restored.
3405 (ii) It is documented that the numeric comparison operators always treat
3406 their arguments as decimal numbers. This was broken in that numbers
3407 starting with 0 were being interpreted as octal.
3409 While fixing these problems I realized that there was another issue that
3410 hadn't been noticed. Values of message_size_limit (both the global option
3411 and the transport option) were treated as octal if they started with 0.
3412 The documentation was vague. These values are now always treated as
3413 decimal, and I will make that clear in the documentation.
3419 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3420 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3423 MH/01 Don't check that the operands of numeric comparison operators are
3424 integers when their expansion is in "skipping" mode (fixes bug
3425 introduced by 4.64-PH/07).
3427 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3428 child addresses, Exim now panics and dies. Previously, because the count
3429 is held in a short int, deliveries were likely to be lost. As such a
3430 large number of recipients for a single message is ridiculous
3431 (performance will be very, very poor), I have chosen to impose a limit
3432 rather than extend the field.
3438 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3439 leftover -K file (the existence of which was triggered by #402).
3440 While we were at it, introduced process PID as part of the -K
3441 filename. This should rule out race conditions when creating
3444 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3445 processing considerably. Previous code took too long for large mails,
3446 triggering a timeout which in turn triggers #401.
3448 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3449 in the DK code in transports.c. sendfile() is not really portable,
3450 hence the _LINUX specificness.
3452 TF/01 In the add_headers option to the mail command in an Exim filter,
3453 there was a bug that Exim would claim a syntax error in any
3454 header after the first one which had an odd number of characters
3457 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3458 callout verification, Exim cached a "reject" for the entire domain. This
3459 is correct for most verifications, but it is not correct for a recipient
3460 verification with use_sender or use_postmaster set, because in that case
3461 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3462 case of MAIL FROM:<> rejection from other early rejections (e.g.
3463 rejection of HELO). When verifying a recipient using a non-null MAIL
3464 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3465 Whatever the result of the callout, the value of the domain cache is
3466 left unchanged (for any other kind of callout, getting as far as trying
3467 RCPT means that the domain itself is ok).
3469 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3472 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3473 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3474 session, the daemon ignores ECONNECT errors and logs others; it now
3475 ignores EPIPE as well.
3477 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3478 (quoted-printable decoding).
3480 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3481 later the small subsequent patch to fix an introduced bug.
3483 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3485 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3487 PH/08 An error is now given if message_size_limit is specified negative.
3489 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3490 to be given (somewhat) arbitrary names.
3492 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3495 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3496 miscellaneous code fixes
3498 PH/10 Added the log_reject_target ACL modifier to specify where to log
3501 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3502 hostname. This is wrong, because it relates to the incoming message (and
3503 probably the interface on which it is arriving) and not to the outgoing
3504 callout (which could be using a different interface). This has been
3505 changed to use the value of the helo_data option from the smtp transport
3506 instead - this is what is used when a message is actually being sent. If
3507 there is no remote transport (possible with a router that sets up host
3508 addresses), $smtp_active_hostname is used.
3510 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3511 tweaks were necessary in order to get it to work (see also 21 below):
3512 (a) The code assumed that strncpy() returns a negative number on buffer
3513 overflow, which isn't the case. Replaced with Exim's string_format()
3515 (b) There were several signed/unsigned issues. I just did the minimum
3516 hacking in of casts. There is scope for a larger refactoring.
3517 (c) The code used strcasecmp() which is not a standard C function.
3518 Replaced with Exim's strcmpic() function.
3519 (d) The code set only $1; it now sets $auth1 as well.
3520 (e) A simple test gave the error "authentication client didn't specify
3521 service in request". It would seem that Dovecot has changed its
3522 interface. Fortunately there's a specification; I followed it and
3523 changed what the client sends and it appears to be working now.
3525 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3528 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3529 address A is aliased to B and C, where B exists and C does not. Without
3530 -v the output is "A verified" because verification stops after a
3531 successful redirection if more than one address is generated. However,
3532 with -v the child addresses are also verified. Exim was outputting "A
3533 failed to verify" and then showing the successful verification for C,
3534 with its parentage. It now outputs "B failed to verify", showing B's
3535 parentage before showing the successful verification of C.
3537 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3538 look up a TXT record in a specific list after matching in a combined
3541 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3542 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3543 they consult the DNS. I had assumed they would set it the way they
3544 wanted; and indeed my experiments on Linux seem to show that in some
3545 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3546 To be on the safe side, however, I have now made the interface to
3547 host_find_byname() similar to host_find_bydns(), with an argument
3548 containing the DNS resolver options. The host_find_byname() function now
3549 sets these options at its start, just as host_find_bydns() does. The smtp
3550 transport options dns_qualify_single and dns_search_parents are passed to
3551 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3552 of host_find_byname() use the default settings of RES_DEFNAMES
3553 (qualify_single) but not RES_DNSRCH (search_parents).
3555 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3556 spool_read_header() do less string testing, by means of a preliminary
3557 switch on the second character of optional "-foo" lines. (This is
3558 overdue, caused by the large number of possibilities that now exist.
3559 Originally there were few.) While I was there, I also converted the
3560 str(n)cmp tests so they don't re-test the leading "-" and the first
3561 character, in the hope this might squeeze out yet more improvement.
3563 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3564 flag allowing group syntax was set by the header_syntax check but not
3565 turned off, possible causing trouble later; (2) The flag was not being
3566 set at all for the header_verify test, causing "group"-style headers to
3567 be rejected. I have now set it in this case, and also caused header_
3568 verify to ignore an empty address taken from a group. While doing this, I
3569 came across some other cases where the code for allowing group syntax
3570 while scanning a header line wasn't quite right (mostly, not resetting
3571 the flag correctly in the right place). These bugs could have caused
3572 trouble for malformed header lines. I hope it is now all correct.
3574 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3575 with the "reply" argument non-NULL. The code, however (which originally
3576 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3577 but it didn't always do it. This confused somebody who was copying the
3578 code for some other use. I have removed all the tests.
3580 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3581 feature that was used to support insecure browsers during the U.S. crypto
3582 embargo. It requires special client support, and Exim is probably the
3583 only MTA that supported it -- and would never use it because real RSA is
3584 always available. This code has been removed, because it had the bad
3585 effect of slowing Exim down by computing (never used) parameters for the
3586 RSA_EXPORT functionality.
3588 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3589 authenticator to fail if there's a tab character in the incoming data
3590 (there should never be unless someone is messing about, as it's supposed
3591 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3592 if the connection is using TLS or if the remote IP is the same as the
3593 local IP, and the "valid-client-cert option" if a client certificate has
3596 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3597 authenticators. This can be used for authorization after authentication
3598 succeeds. (In the case of plaintext, it servers for both authentication
3601 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3602 if any retry times were supplied.
3604 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3605 connection, where there is no client IP address to check. In this
3606 situation, the verify now always succeeds.
3608 PH/25 Applied John Jetmore's -Mset patch.
3610 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3612 PH/27 In a string expansion for a processed (not raw) header when multiple
3613 headers of the same name were present, leading whitespace was being
3614 removed from all of them, but trailing whitespace was being removed only
3615 from the last one. Now trailing whitespace is removed from each header
3616 before concatenation. Completely empty headers in a concatenation (as
3617 before) are ignored.
3619 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3620 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3622 PH/29 [Removed. This was a change that I later backed out, and forgot to
3623 correct the ChangeLog entry (that I had efficiently created) before
3624 committing the later change.]
3626 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3627 address errors (4xx response to RCPT) over the same connection as other
3628 messages routed to the same hosts. Such deliveries are always "forced",
3629 so retry times are not inspected. This resulted in far too many retries
3630 for the affected addresses. The effect occurred only when there were more
3631 hosts than the hosts_max_try setting in the smtp transport when it had
3632 the 4xx errors. Those hosts that it had tried were not added to the list
3633 of hosts for which the message was waiting, so if all were tried, there
3634 was no problem. Two fixes have been applied:
3636 (i) If there are any address or message errors in an SMTP delivery, none
3637 of the hosts (tried or untried) are now added to the list of hosts
3638 for which the message is waiting, so the message should not be a
3639 candidate for sending over the same connection that was used for a
3640 successful delivery of some other message. This seems entirely
3641 reasonable: after all the message is NOT "waiting for some host".
3642 This is so "obvious" that I'm not sure why it wasn't done
3643 previously. Hope I haven't missed anything, but it can't do any
3644 harm, as the worst effect is to miss an optimization.
3646 (ii) If, despite (i), such a delivery is accidentally attempted, the
3647 routing retry time is respected, so at least it doesn't keep
3648 hammering the server.
3650 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3651 in ${readsocket because some servers need this prod.
3653 PH/32 Added some extra debug output when updating a wait-xxx database.
3655 PH/33 The hint "could be header name not terminated by colon", which has been
3656 given for certain expansion errors for a long time, was not being given
3657 for the ${if def:h_colon_omitted{... case.
3659 PH/34 The spec says: "With one important exception, whenever a domain list is
3660 being scanned, $domain contains the subject domain." There was at least
3661 one case where this was not true.
3663 PH/35 The error "getsockname() failed: connection reset by peer" was being
3664 written to the panic log as well as the main log, but it isn't really
3665 panic-worthy as it just means the connection died rather early on. I have
3666 removed the panic log writing for the ECONNRESET error when getsockname()
3669 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3670 runs only) independently of the message's sender address. This meant
3671 that, if the 4xx error was in fact related to the sender, a different
3672 message to the same recipient with a different sender could confuse
3673 things. In particular, this can happen when sending to a greylisting
3674 server, but other circumstances could also provoke similar problems.
3675 I have changed the default so that the retry time for these errors is now
3676 based a combination of the sender and recipient addresses. This change
3677 can be overridden by setting address_retry_include_sender=false in the
3680 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3681 remote server are returned as part of bounce messages. This was not
3682 happening for LMTP over a pipe (the lmtp transport), but now it is the
3683 same for both kinds of LMTP.
3685 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3686 in header lines that were in fact CNAMEs. This is no longer the case.
3688 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3689 and queue runs started by the daemon processed all messages. This has
3690 been fixed so that -R and -S can now usefully be given with -q<time>.
3692 PH/40 Import PCRE release 6.7 (fixes some bugs).
3694 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3696 PH/42 Give an error if -q is specified more than once.
3698 PH/43 Renamed the variables $interface_address and $interface_port as
3699 $received_ip_address and $received_port, to make it clear that these
3700 values apply to message reception, and not to the outgoing interface when
3701 a message is delivered. (The old names remain recognized, of course.)
3703 PH/44 There was no timeout on the connect() call when using a Unix domain
3704 socket in the ${readsocket expansion. There now is.
3706 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3707 be meaningful with "accept".
3709 SC/01 Eximstats V1.43
3710 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3712 SC/02 Eximstats V1.44
3713 Use a glob alias rather than an array ref in the generated
3714 parser. This improves both readability and performance.
3716 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3717 Collect SpamAssassin and rejection statistics.
3718 Don't display local sender or destination tables unless
3719 there is data to show.
3720 Added average volumes into the top table text output.
3722 SC/04 Eximstats V1.46
3723 Collect data on the number of addresses (recipients)
3724 as well as the number of messages.
3726 SC/05 Eximstats V1.47
3727 Added 'Message too big' to the list of mail rejection
3728 reasons (thanks to Marco Gaiarin).
3730 SC/06 Eximstats V1.48
3731 Mainlog lines which have GMT offsets and are too short to
3732 have a flag are now skipped.
3734 SC/07 Eximstats V1.49 (Alain Williams)
3735 Added the -emptyok flag.
3737 SC/08 Eximstats V1.50
3738 Fixes for obtaining the IP address from reject messages.
3740 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3741 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3742 whitespace changes from 4.64-PH/27
3744 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3747 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3748 are found, allow negative numbers in numeric criteria)
3750 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3752 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3753 to match changes made in 4.64-PH/43
3755 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3757 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3758 "domain" is actually an IP address, and force a failure. This locks out
3759 those revolvers/nameservers that support "A-for-A" lookups, in
3760 contravention of the specifications.
3762 PH/48 When a host name was looked up from an IP address, and the subsequent
3763 forward lookup of the name timed out, the host name was left in
3764 $sender_host_name, contrary to the specification.
3766 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3767 restricted to single-key lookups, Exim was not diagnosing an error if
3768 * or *@ was used with a query-style lookup.
3770 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3772 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3773 long ago, but noone interested enough thought of it. Let's just say that
3774 the "1.1" means that there are some new functions that weren't there at
3775 some point in the past.
3777 PH/51 Error processing for expansion failure of helo_data from an smtp
3778 transport during callout processing was broken.
3780 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3781 tested/used via the -bh/-bhc/-bs options.
3783 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3784 bug, fixed in subsequent PCRE releases).
3786 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3787 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3789 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3795 SC/01 Use a glob alias rather than an array ref in eximstats generated
3796 parser. This improves both readability and performance.
3798 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3799 Don't display local sender or destination tables in eximstats unless
3800 there is data to show.
3801 Added average volumes into the eximstats top table text output.
3803 SC/03 Collect data on the number of addresses (recipients) as well
3804 as the number of messages in eximstats.
3806 TF/01 Correct an error in the documentation for the redirect router. Exim
3807 does (usually) call initgroups() when daemonizing.
3809 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3810 with consistent privilege compared to when running as a daemon.
3812 TF/03 Note in the spec that $authenticated_id is not set for local
3813 submissions from trusted users.
3815 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3816 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3818 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3819 by adding some example configuration directives to the default
3820 configuration file. A little bit of work is required to uncomment the
3821 directives and define how usernames and passwords are checked, but
3822 there is now a framework to start from.
3824 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3825 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3826 without this. I don't know how relevant this is to other LDAP libraries.
3828 PH/02 Add the verb name to the "unknown ACL verb" error.
3830 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3832 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3834 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3835 directory not expanded when it should be if an expanded home directory
3836 was set for the address (which is overridden by the transport).
3838 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3841 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3842 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3843 because it is too late at that time, and has no effect.
3845 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3846 security issue with \' (bugzilla #107). I could not use the
3847 PQescapeStringConn() function, because it needs a PGconn value as one of
3850 PH/08 When testing addresses using -bt, indicate those final addresses that
3851 are duplicates that would not cause an additional delivery. At least one
3852 person was confused, thinking that -bt output corresponded to deliveries.
3853 (Suppressing duplicates isn't a good idea as you lose the information
3854 about possibly different redirections that led to the duplicates.)
3856 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3857 systems where poll() doesn't work, in particular OS X.
3859 PH/10 Added more information to debugging output for retry time not reached.
3861 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3862 operations in malware.c.
3864 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3867 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3868 syslog_duplication set false, log lines that would normally be written
3869 both the the main log and to the reject log were not written to syslog at
3872 PH/14 In the default configuration, change the use of "message" in ACL warn
3873 statements to "add_header".
3875 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3876 not followed by a command (e.g. "seen endif").
3878 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3879 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3882 PH/17 Added extra conditions to the default value of delay_warning_condition
3886 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3887 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3888 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3891 The Auto-Submitted: and various List- headers are standardised, whereas I
3892 don't think Precedence: ever was.
3894 PH/18 Refactored debugging code in route_finduser() to show more information,
3895 in particular, the error code if getpwnam() issues one.
3897 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3898 This is apparently needed in addition to the PH/07 change above to avoid
3899 any possible encoding problems.
3901 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3902 but not after initializing Perl.
3904 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3905 output them only if debugging. By default they are written stderr,
3906 apparently, which is not desirable.
3908 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3911 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3914 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3916 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3917 authenticated or an ident call has been made. Suppress the default
3918 values for $authenticated_id and $authenticated_sender (but permit -oMai
3919 and -oMas) when testing with -bh.
3921 PH/24 Re-jigged the order of the tests in the default configuration so that the
3922 tests for valid domains and recipients precede the DNS black list and CSA
3923 tests, on the grounds that those ones are more expensive.
3925 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3926 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3927 This bug exists in every version of Exim that I still have, right back to
3930 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3931 However, an attempt to turn on case-sensitivity in a regex key by
3932 including (?-i) didn't work because the subject string was already
3933 lowercased, and the effects were non-intuitive. It turns out that a
3934 one-line patch can be used to allow (?-i) to work as expected.
3940 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3941 other effects) broke the use of negated acl sub-conditions.
3943 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3946 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3947 "Deny" causes Exim to reject the incoming connection with a 554 error.
3948 Unfortunately, if there is a major crisis, such as a disk failure,
3949 tcp-wrappers gives "deny", whereas what one would like would be some
3950 kind of temporary error. A kludge has been added to help with this.
3951 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3952 554 error is used if errno is still zero or contains ENOENT (which occurs
3953 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3956 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3958 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3959 errors. Otherwise a message that provokes a temporary error (when other
3960 messages do not) can cause a whole host to time out.
3962 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3963 addresses were routed directly to files or pipes from a redirect router.
3964 File deliveries just didn't batch; pipe deliveries might have suffered
3967 PH/06 A failure to get a lock for a hints database would erroneously always say
3968 "Failed to get write lock", even when it was really a read lock.
3970 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3971 of 0600. This has been changed to use the value of the lockfile_mode
3972 option (which defaults to 0600).
3974 PH/08 Applied small patch from the Sieve maintainer.
3976 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3977 folder from quota calculations, a direct delivery into this folder messed
3978 up the contents of the maildirsize file. This was because the regex was
3979 used only to exclude .Trash (or whatever) when the size of the mailbox
3980 was calculated. There was no check that a delivery was happening into an
3981 excluded directory. This bug has been fixed by ignoring all quota
3982 processing for deliveries into excluded directories.
3984 PH/10 Added the maildirfolder_create_regex option to appendfile.
3990 PH/01 The code for finding all the local interface addresses on a FreeBSD
3991 system running IPv6 was broken. This may well have applied to all BSD
3992 systems, as well as to others that have similar system calls. The broken
3993 code found IPv4 interfaces correctly, but gave incorrect values for the
3994 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3995 that it would not match correctly against @[] and not recognize the IPv6
3998 PH/02 The ipliteral router was not recognizing addresses of the form user@
3999 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4001 PH/03 Added disable_ipv6.
4003 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4004 decoded form, because it is most often used to construct To: headers
4005 lines in autoreplies, and the decoded form may well be syntactically
4006 invalid. However, $reply_address has leading white space removed, and all
4007 newlines turned into spaces so that the autoreply transport does not
4010 PH/05 If group was specified without a user on a router, and no group or user
4011 was specified on a transport, the group from the router was ignored.
4013 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4014 for visible compile-time settings that can be used to change these
4015 numbers, for those that want even more. Backwards compatibility with old
4016 spool files has been maintained. However, going back to a previous Exim
4017 release will lost any variables that are in spool files.
4019 PH/07 Two small changes when running in the test harness: increase delay when
4020 passing a TCP/IP connection to a new process, in case the original
4021 process has to generate a bounce, and remove special handling of
4022 127.0.0.2 (sic), which is no longer necessary.
4024 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4025 be the same on different OS.
4027 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4030 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4031 whether --show-vars was specified or not
4033 JJ/02 exipick: Added support for new ACL variable spool format introduced
4036 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4037 syntactically invalid From: or Reply-to: line, and a filter used this to
4038 generate an autoreply, and therefore failed to obtain an address for the
4039 autoreply, Exim could try to deliver to a non-existent relative file
4040 name, causing unrelated and misleading errors. What now happens is that
4041 it logs this as a hard delivery error, but does not attempt to create a
4044 PH/11 The exinext utility has a -C option for testing purposes, but although
4045 the given file was scanned by exinext itself; it wasn't being passed on
4046 when Exim was called.
4048 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4049 an end-of-file indication when reading a command response.
4051 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4052 compiled. In many other places in Exim, IPv6 addresses are always
4053 recognized, so I have changed this. It also means that IPv4 domain
4054 literals of the form [IPV4:n.n.n.n] are now always recognized.
4056 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4057 used if the router is not running as root, for example, when verifying at
4058 ACL time, or when using -bh. The debugging output from this situation was
4059 non-existent - all you got was a failure to exec. I have made two
4062 (a) Failures to set uid/gid, the current directory, or a process leader
4063 in a subprocess such as that created by queryprogram now generate
4064 suitable debugging output when -d is set.
4066 (b) The queryprogram router detects when it is not running as root,
4067 outputs suitable debugging information if -d is set, and then runs
4068 the subprocess without attempting to change uid/gid.
4070 PH/15 Minor change to Makefile for building test_host (undocumented testing
4073 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4074 additional section of a DNS packet that returns MX or SRV records.
4075 Instead, it always explicitly searches for A/AAAA records. This avoids
4076 major problems that occur when a DNS server includes only records of one
4077 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4078 fixed another bug: if SRV records were looked up and the corresponding
4079 address records were *not* found in the additional section, the port
4080 values from the SRV records were lost.
4082 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4083 using the correct key (the original address) when searching the retry
4084 rules in order to find which one to use for generating the retry hint.
4086 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4087 adding the default one. Similarly, if it contains a Reply-To: header, the
4088 errors_reply_to option, if set, is not used.
4090 PH/19 When calculating a retry time, Exim used to measure the "time since
4091 failure" by looking at the "first failed" field in the retry record. Now
4092 it does not use this if it is later than than the arrival time of the
4093 message. Instead it uses the arrival time. This makes for better
4094 behaviour in cases where some deliveries succeed, thus re-setting the
4095 "first failed" field. An example is a quota failure for a huge message
4096 when small messages continue to be delivered. Without this change, the
4097 "time since failure" will always be short, possible causing more frequent
4098 delivery attempts for the huge message than are intended.
4099 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4101 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4102 $1, $2, $3) because the numerical variables can be reset during some
4103 expansion items (e.g. "match"), thereby losing the authentication data.
4105 PH/21 Make -bV show the size of off_t variables so that the test suite can
4106 decide whether to run tests for quotas > 2G.
4108 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4109 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4110 filecount value is greater than 2G or if a quota value is greater than 2G
4111 on a system where the size of off_t is not greater than 4, a panic error
4114 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4115 never match. The debug and -bh output now contains an explicit error
4116 message indicating a malformed IPv4 address or mask.
4118 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4119 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4120 PH/23 above applies.
4122 PH/25 Do not write to syslog when running in the test harness. The only
4123 occasion when this arises is a failure to open the main or panic logs
4124 (for which there is an explicit test).
4126 PH/26 Added the /no_tell option to "control=freeze".
4128 PH/27 If a host name lookup failed very early in a connection, for example, if
4129 the IP address matched host_lookup and the reverse lookup yielded a name
4130 that did not have a forward lookup, an error message of the form "no IP
4131 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4132 could be logged. Now it outputs the IP address instead of "NULL".
4134 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4135 allows the sender and the authenticated sender to be set when
4136 submitting a message from within Exim. Since child_open_exim() is
4137 documented for local_scan(), the new function should be too.
4139 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4140 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4141 results in an empty string is now treated as unset.
4143 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4145 PH/31 Added sender_verify_fail logging option.
4147 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4148 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4149 tidied the source and removed it altogether.
4151 PH/33 When a queue run was abandoned because the load average was too high, a
4152 log line was always written; now it is written only if the queue_run log
4153 selector is set. In addition, the log line for abandonment now contains
4154 information about the queue run such as the pid. This is always present
4155 in "start" and "stop" lines but was omitted from the "abandon" line.
4157 PH/34 Omit spaces between a header name and the colon in the error message that
4158 is given when verify = headers_syntax fails (if there are lots of them,
4159 the message gets confusing).
4161 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4162 names, as there are now some PTR records that contain slashes. This check
4163 is only to protect against broken name servers that fall over on strange
4164 characters, so the fact that it applies to all lookups doesn't matter.
4166 PH/36 Now that the new test suite is complete, we can remove some of the
4167 special code in Exim that was needed for the old test suite. For example,
4168 sorting DNS records because real resolvers return them in an arbitrary
4169 order. The new test suite's fake resolver always returns records in the
4172 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4173 bounces) except when queue_only is set, to avoid logging races between
4174 the different processes.
4176 PH/38 Panic-die if .include specifies a non-absolute path.
4178 PH/39 A tweak to the "H" retry rule from its user.
4180 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4181 a label. They prevented compilation on older perls.
4183 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4184 a warning to be raised on newish perls.
4186 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4187 on queue. Changes to match documented behaviour of showing count of
4188 messages matching specified criteria.
4190 PH/40 Changed the default ident timeout from 30s to 5s.
4192 PH/41 Added support for the use of login_cap features, on those BSD systems
4193 that have them, for controlling the resources used by pipe deliveries.
4195 PH/42 The content-scanning code uses fopen() to create files in which to put
4196 message data. Previously it was not paying any attention to the mode of
4197 the files. Exim runs with umask(0) because the rest of the code creates
4198 files with open(), and sets the required mode explicitly. Thus, these
4199 files were ending up world-writeable. This was not a big issue, because,
4200 being within the spool directory, they were not world-accessible. I have
4201 created a function called modefopen, which takes an additional mode
4202 argument. It sets umask(777), creates the file, chmods it to the required
4203 mode, then resets the umask. All the relevant calls to fopen() in the
4204 content scanning code have been changed to use this function.
4206 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4207 to 24 hours. This avoids potential overflow problems when processing G
4208 and H retry rules. I suspect nobody ever tinkers with this value.
4210 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4212 PH/45 When the plaintext authenticator is running as a client, the server's
4213 challenges are checked to ensure they are valid base64 strings. By
4214 default, the authentication attempt is cancelled if an invalid string is
4215 received. Setting client_ignore_invalid_base64 true ignores these errors.
4216 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4217 they are received. Thus, the responses can be made to depend on the
4218 challenges. If an invalid string is ignored, an empty string is placed in
4221 PH/46 Messages that are created by the autoreply transport now contains a
4222 References: header, in accordance with RFCs 2822 and 3834.
4224 PH/47 Added authenticated_sender_force to the smtp transport.
4226 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4228 PH/49 Installed latest patch from the Sieve maintainer.
4230 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4231 was also set, the appendfile transport was unnecessarily scanning a
4232 directory of message files (e.g. for maildir delivery) to find the count
4233 of files (along with the size), even though it did not need this
4234 information. It now does the scan only if it needs to find either the
4235 size of the count of files.
4237 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4239 PH/52 Two bugs concerned with error handling when the smtp transport is
4242 (i) Exim was not creating retry information for temporary errors given
4243 for individual recipients after the DATA command when the smtp transport
4244 was used in LMTP mode. This meant that they could be retried too
4245 frequently, and not timed out correctly.
4247 (ii) Exim was setting the flag that allows error details to be returned
4248 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4249 recipients that were returned after the DATA command.
4251 PH/53 This is related to PH/52, but is more general: for any failing address,
4252 when detailed error information was permitted to be returned to the
4253 sender, but the error was temporary, then after the final timeout, only
4254 "retry timeout exceeded" was returned. Now it returns the full error as
4255 well as "retry timeout exceeded".
4257 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4258 do this, and (what is worse) MTAs that accept it.
4260 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4261 will now be deprecated.
4263 PH/56 New os.c-cygwin from the Cygwin maintainer.
4265 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4266 formats (previously only available in exim formats via -bpr, -bpru,
4267 and -bpra. Now also available in native and exiqgrep formats)
4269 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4270 with very large, slow to parse queues
4272 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4274 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4276 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4277 responses to authentication challenges, though it was showing the
4278 challenges; (ii) I've removed the CR characters from the debug output for
4281 PH/58 Allow for the insertion of a newline as well as a space when a string
4282 is turned into more than one encoded-word during RFC 2047 encoding. The
4283 Sieve code now uses this.
4285 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4286 data_4xx, lost_connection, tls_required.
4288 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4289 message was being sent as an SMTP response.
4291 PH/61 Add -l and -k options to exicyclog.
4293 PH/62 When verifying, if an address was redirected to one new address, so that
4294 verification continued, and the new address failed or deferred after
4295 having set something in $address_data, the value of $address_data was not
4296 passed back to the ACL. This was different to the case when no
4297 redirection occurred. The value is now passed back in both cases.
4299 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4300 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4301 use login_cap.h, so on its own it isn't the distinguishing feature. The
4302 new name refers directly to the setclassresources() function.
4304 PH/65 Added configuration files for NetBSD3.
4306 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4308 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4309 is preferred over IPv4.
4311 PH/68 The bounce_return_message and bounce_return_body options were not being
4312 honoured for bounces generated during the reception of non-SMTP messages.
4313 In particular, this applied to messages rejected by the ACL. This bug has
4314 been fixed. However, if bounce_return_message is true and bounce_return_
4315 body is false, the headers that are returned for a non-SMTP message
4316 include only those that have been read before the error was detected.
4317 (In the case of an ACL rejection, they have all been read.)
4319 PH/69 The HTML version of the specification is now built in a directory called
4320 spec_html instead of spec.html, because the latter looks like a path with
4321 a MIME-type, and this confuses some software.
4323 PH/70 Catch two compiler warnings in sieve.c.
4325 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4326 function verify_get_ident() calls ip_connect() to connect a socket, but
4327 if the "connect()" function timed out, ip_connect() used to close the
4328 socket. However, verify_get_ident() also closes the socket later, and in
4329 between Exim writes to the log, which may get opened at this point. When
4330 the socket was closed in ip_connect(), the log could get the same file
4331 descriptor number as the socket. This naturally causes chaos. The fix is
4332 not to close the socket in ip_connect(); the socket should be closed by
4333 the function that creates it. There was only one place in the code where
4334 this was missing, in the iplookup router, which I don't think anybody now
4335 uses, but I've fixed it anyway.
4337 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4338 well as to direct DNS lookups. Otherwise the handling of names in host
4339 lists is inconsistent and therefore confusing.
4345 PH/01 Two changes to the default runtime configuration:
4347 (1) Move the checks for relay_from_hosts and authenticated clients from
4348 after to before the (commented out) DNS black list checks.
4350 (2) Add control=submission to the relay_from_hosts and authenticated
4351 clients checks, on the grounds that messages accepted by these
4352 statements are most likely to be submissions.
4354 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4356 (1) Generate an error if the third argument for the ${prvs expansion is
4359 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4362 (3) Reset the variables that are obtained from the first argument of
4363 ${prvscheck and used in the second argument before leaving the code,
4364 because their memory is reclaimed, so using them afterwards may do
4367 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4368 one (it's much easier than Tom thought :-).
4370 (5) Because of (4), we can now allow for the use of $prvscheck_result
4371 inside the third argument.
4373 PH/03 For some reason, the default setting of PATH when running a command from
4374 a pipe transport was just "/usr/bin". I have changed it to
4377 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4378 anything to be listed in the output from -bV.
4380 PH/05 When a filter generated an autoreply, the entire To: header line was
4381 quoted in the delivery log line, like this:
4383 => >A.N.Other <ano@some.domain> <original@ddress> ...
4385 This has been changed so that it extracts the operative address. There
4386 may be more than one such address. If so, they are comma-separated, like
4389 => >ano@some.domain,ona@other.domain <original@ddress> ...
4391 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4392 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4393 not being looked up in the rDNS to get a host name, Exim was showing the
4394 IP address twice in Received: lines, even though the IP addresses were
4395 identical. For example:
4397 Received: from [1.2.3.4] (helo=[1.2.3.4])
4399 However, if the real host name was known, it was omitting the HELO data
4400 if it matched the actual IP address. This has been tidied up so that it
4401 doesn't show the same IP address twice.
4403 PH/07 When both +timestamp and +memory debugging was on, the value given by
4404 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4405 called by the debug printing, thereby overwriting the timestamp buffer.
4406 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4408 PH/08 When the original message was included in an autoreply transport, it
4409 always said "this is a copy of the message, including all the headers",
4410 even if body_only or headers_only was set. It now gives an appropriate
4413 PH/09 Applied a patch from the Sieve maintainer which:
4415 o fixes some comments
4416 o adds the (disabled) notify extension core
4417 o adds some debug output for the result of if/elsif tests
4418 o points to the current vacation draft in the documentation
4419 and documents the missing references header update
4423 o fixes a bug in processing the envelope test (when testing
4424 multiple envelope elements, the last element determined the
4427 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4428 Electronic Mail") by including:
4430 Auto-submitted: auto-generated
4432 in the messages that it generates (bounce messages and others, such as
4433 warnings). In the case of bounce messages for non-SMTP messages, there was
4434 also a typo: it was using "Auto_submitted" (underscore instead of
4435 hyphen). Since every message generated by Exim is necessarily in response
4436 to another message, thes have all been changed to:
4438 Auto-Submitted: auto-replied
4440 in accordance with these statements in the RFC:
4442 The auto-replied keyword:
4444 - SHOULD be used on messages sent in direct response to another
4445 message by an automatic process,
4447 - MUST NOT be used on manually-generated messages,
4449 - MAY be used on Delivery Status Notifications (DSNs) and Message
4450 Disposition Notifications (MDNs),
4452 - MUST NOT be used on messages generated by automatic or periodic
4453 processes, except for messages which are automatic responses to
4456 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4457 to the default Received: header definition.
4459 PH/12 Added log selector acl_warn_skipped (default on).
4461 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4462 variables because (a) they are in the wrong storage pool and (b) even if
4463 they were copied, it wouldn't work properly because of the caching.
4465 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4466 checking when decoding. Apparently there are clients that generate
4467 overlong encoded strings. Why am I not surprised?
4469 PH/15 If the first argument of "${if match_address" was not empty, but did not
4470 contain an "@" character, Exim crashed. Now it writes a panic log message
4471 and treats the condition as false.
4473 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4475 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4476 extension "envelope-auth". The code is finished and in agreement with
4477 other implementations, but there is no documentation so far and in fact,
4478 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4479 not changing the active code.
4481 Print executed "if" and "elsif" statements when debugging is used. This
4482 helps a great deal to understand what a filter does.
4484 Document more things not specified clearly in RFC3028. I had all this
4485 sorted out, when out of a sudden new issues came to my mind. Oops."
4487 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4490 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4491 canonical form (as documented). However, after a host name lookup from
4492 the IP address, check_host() was doing a simple string comparison with
4493 addresses acquired from the DNS when checking that the found name did
4494 have the original IP as one of its addresses. Since any found IPv6
4495 addresses are likely to be in abbreviated form, the comparison could
4496 fail. Luckily, there already exists a function for doing the comparison
4497 by converting both addresses to binary, so now that is used instead of
4498 the text comparison.
4500 PH/20 There was another similar case to PH/19, when a complete host name was
4501 given in a host list; looking up its IP address could give an abbreviated
4502 form, whereas the current host's name might or might not be abbreviated.
4503 The same fix has been applied.
4509 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4510 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4513 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4514 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4516 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4518 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4519 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4520 Also, for "Auto-Submitted", treat anything other than "no" as
4521 non-personal, in accordance with RFC 3834. (Previously it treated
4522 anything starting "auto-" as non-personal.)
4524 TF/01 The control=submission/name=... option had a problem with syntax
4525 errors if the name included a slash character. The /name= option
4526 now slurps the rest of the string, so it can include any characters
4527 but it must come last in the list of options (after /sender_retain
4530 PH/05 Some modifications to the interface to the fake nameserver for the new
4538 TK/01 Added the "success_on_redirect" address verification option. See
4539 NewStuff for rationale and an example.
4541 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4543 PH/02 Patch to exigrep to allow it to work on syslog lines.
4545 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4546 fread() to skip over the body file's header line, because in Cygwin the
4547 header line is locked and is inaccessible.
4549 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4550 co-exist for some time) to make it clear that it is the Exim ID that is
4551 referenced, not the Message-ID: header line.
4553 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4554 string_format() function, because snprintf() does not exist on all
4557 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4558 ${stat: expansion item.
4560 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4561 protocol synchronization error", to keep the pedants happy.
4563 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4564 well as for IRIX systems, when gcc is being used. See the host.c source
4567 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4569 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4572 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4573 transport and to the smtp transport in LMTP mode.
4575 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4577 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4578 run a filter in a subprocess. This could lead to confusion in subsequent
4579 lookups in the parent process. There should also be a search_tidyup() at
4580 the end of the subprocess.
4582 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4583 only if the host matched helo_try_verify_hosts, which caused the
4584 verification to occur when the EHLO/HELO command was issued. The ACL just
4585 tested the remembered result. Now, if a previous verification attempt has
4586 not happened, "verify = helo" does it there and then.
4588 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4590 TK/03 Fix log output including CR from clamd.
4592 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4593 exist provoked a memory error which could cause a segfault.
4595 PH/15 Installed PCRE 6.2
4597 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4599 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4600 of the problem. Specifically, suggested +O2 rather than +O1 for the
4603 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4605 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4606 record, the port was not correctly logged when the outgoing_port log
4607 selector was set (it logged the transort's default port).
4609 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4610 fallback_hosts, and "hosts" in the smtp transport.
4612 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4613 host errors such as "Connection refused".
4615 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4616 authentication with radiusclient 0.4.9:
4618 - Error returned from rc_read_config was caught wrongly
4619 - Username/password not passed on to radius server due to wrong length.
4621 The presumption is that some radiusclient API changes for 4.51/PH/17
4622 were not taken care of correctly. The code is still untested by me (my
4623 Linux distribution still has 0.3.2 of radiusclient), but it was
4624 contributed by a Radius user.
4626 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4627 expanding the "port" option of the smtp transport.
4629 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4630 while reading a MIME header. Thanks to Tom Hughes for a patch.
4632 PH/24 Include config.h inside local_scan.h so that configuration settings are
4635 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4636 that in an ACL for RCPT (for example), you can examine exactly what was
4639 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4640 commands, but it was not correctly comparing the address with the actual
4641 client host address. Thus, it would show the EHLO address in Received:
4642 header lines when this was not necessary.
4644 PH/27 Added the % operator to ${eval:}.
4646 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4647 it should be ignoring failures (because with -C, for example, it has lost
4648 privilege). It wasn't ignoring creation failures other than "already
4651 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4654 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4655 because an input line was too long, either on its own, or by virtue of
4656 too many continuations, the temporary file was not being removed, and the
4657 return code was incorrect.
4659 PH/31 Missing "BOOL" in function definition in filtertest.c.
4661 PH/32 Applied Sieve patches from the maintainer.
4663 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4665 PH/33 Added "verify = not_blind".
4667 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4668 Local/Makefile (with some defaults set). These are used in built scripts
4669 such as exicyclog, but they have never been used in the exim_install
4670 script (though there are many overriding facilities there). I have
4671 arranged that the exim_install script now takes note of these two
4674 PH/35 Installed configuration files for Dragonfly.
4676 PH/36 When a locally submitted message by a trusted user did not contain a
4677 From: header, and the sender address was obtained from -f or from an SMTP
4678 MAIL command, and the trusted user did not use -F to supply a sender
4679 name, $originator_name was incorrectly used when constructing a From:
4680 header. Furthermore, $originator_name was used for submission mode
4681 messages from external hosts without From: headers in a similar way,
4682 which is clearly wrong.
4684 PH/37 Added control=suppress_local_fixups.
4686 PH/38 When log_selector = +received_sender was set, and the addition of the
4687 sender made the log line's construction buffer exactly full, or one byte
4688 less than full, an overflow happened when the terminating "\n" was
4691 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4692 when the result of a list match is failure because a DNS lookup failed.
4694 PH/40 RM_COMMAND is now used in the building process.
4696 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4697 the "build-* directories that it finds.
4699 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4700 address in a domain literal was a prefix of an interface address.
4702 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4703 when verifying a sender address, unless rewrite_headers is false.
4705 PH/44 Wrote a long comment about why errors_to addresses are verified as
4706 recipients, not senders.
4708 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4709 the ratelimit ACL was added.
4711 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4713 PH/46 Added extra information about PostgreSQL errors to the error string.
4715 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4716 avoiding the need to install special zones in a real server. This is
4717 backwards compatible; if it can't find the fake resolver, it drops back.
4718 Thus, both old and new test suites can be run.
4720 TF/02 Added util/ratelimit.pl
4722 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4723 clock is set back in time.
4725 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4726 Candler <B.Candler@pobox.com>.
4728 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4729 OK for addresses that are the result of redirections.
4731 PH/48 A number of further additions for the benefit of the new test suite,
4732 including a fake gethostbyname() that interfaces to the fake DNS resolver
4735 TF/06 The fix for widen_domains has also been applied to qualify_single and
4736 search_parents which are the other dnslookup options that can cause
4739 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4742 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4744 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4745 service" if it encountered an MX record with an empty target hostname.
4746 The message is now "an MX or SRV record indicated no SMTP service".
4748 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4749 if the DNS of the sending site is misconfigured. This is quite a
4750 common situation. This change restores the behaviour of treating a
4751 helo verification defer as a failure.
4753 PH/51 If self=fail was set on a router, the bounce message did not include the
4754 actual error message.
4760 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4762 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4763 command itself ended in error, the underlying message about the transport
4764 filter timeout was being overwritten with the pipe command error. Now the
4765 underlying error message should be appended to the second error message.
4767 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4769 PH/02 Reduce the amount of output that "make" produces by default. Full output
4770 can still be requested.
4772 PH/03 The warning log line about a condition test deferring for a "warn" verb
4773 was being output only once per connection, rather than after each
4774 occurrence (because it was using the same function as for successful
4775 "warn" verbs). This seems wrong, so I have changed it.
4777 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4778 it should not have, which might have caused a crash in the right
4779 circumstances, but probably never did.
4781 PH/04 Installed a modified version of Tony Finch's patch to make submission
4782 mode fix the return path as well as the Sender: header line, and to
4783 add a /name= option so that you can make the user's friendly name appear
4786 TF/03 Added the control = fakedefer ACL modifier.
4788 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4789 Mark Lowes for thorough testing.
4791 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4793 TK/03 Merged latest SRS patch from Miles Wilton.
4795 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4796 with the definition in sysexits.h (which is #included earlier).
4797 Fortunately, Exim does not actually use EX_OK. The code used to try to
4798 preserve the sysexits.h value, by assuming that macro definitions were
4799 scanned for macro replacements. I have been disabused of this notion,
4800 so now the code just undefines EX_OK before #including unistd.h.
4802 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4803 in the smtp transport. When a block could not be written in a single
4804 write() function, the timeout was being re-applied to each part-write.
4805 This seems wrong - if the receiver was accepting one byte at a time it
4806 would take for ever. The timeout is now adjusted when this happens. It
4807 doesn't have to be particularly precise.
4809 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4810 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4812 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4813 without a domain if the check to <postmaster@domain> fails.
4815 SC/01 Eximstats: added -xls and the ability to specify output files
4816 (patch written by Frank Heydlauf).
4818 SC/02 Eximstats: use FileHandles for outputting results.
4820 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4822 SC/04 Eximstats: fixed display of large numbers with -nvr option
4824 SC/05 Eximstats: fixed merging of reports with empty tables.
4826 SC/06 Eximstats: added the -include_original_destination flag
4828 SC/07 Eximstats: removed tabs and trailing whitespace.
4830 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4832 TK/06 MBOX spool code: Add real "From " MBOX separator line
4833 so the .eml file is really in mbox format (even though
4834 most programs do not really care). Patch from Alex Miller.
4836 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4837 The latter is generated from $received_to and is only set if the
4838 message has one envelope recipient. SA can use these headers,
4839 obviously out-of-the-box. Patch from Alex Miller.
4841 PH/08 The ${def test on a variable was returning false if the variable's
4842 value was "0", contrary to what the specification has always said!
4843 The result should be true unless the variable is empty.
4845 PH/09 The syntax error of a character other than { following "${if
4846 def:variable_name" (after optional whitespace) was not being diagnosed.
4847 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4848 accidental colon was present, for example, could give incorrect results.
4850 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4851 result is used (not including appendfile, where other changes are about
4854 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4855 This involved changing a lot of size variables from int to off_t. It
4856 should work with maildirs and everything.
4858 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4859 spamd dying while we are connected to it.
4861 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4864 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4865 function for BDB 4.3.
4867 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4869 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4870 the sources for PCRE have been re-arranged and more files are now
4873 PH/15 The code I had for printing potentially long long variables in PH/11
4874 above was not the best (it lost precision). The length of off_t variables
4875 is now inspected at build time, and an appropriate printing format (%ld
4876 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4877 to be "long long int" or "long int". This is needed for the internal
4878 formatting function string_vformat().
4880 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4881 the configuration file to be ":syslog", then the script "guesses" where
4882 the logs files are, rather than using the compiled in default. In our
4883 case the guess is not the same as the compiled default, so the script
4884 suddenly stopped working when I started to use syslog. The patch checks
4885 to see if log_file_path is "". If so, it attempts to read it from exim
4886 with no configuration file to get the compiled in version, before it
4887 falls back to the previous guessing code."
4889 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4890 implementing BATV in an Exim configuration. See NewStuff for the gory
4893 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4894 Makefile that are specific to HP-UX.
4896 PH/18 If the "use_postmaster" option was set for a recipient callout together
4897 with the "random" option, the postmaster address was used as the MAIL
4898 FROM address for the random test, but not for the subsequent recipient
4899 test. It is now used for both.
4901 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4902 patch removes a few documentation additions to RFC 3028, because the
4903 latest draft now contains them. It adds the new en;ascii-case comparator
4904 and a new error check for 8bit text in MIME parts. Comparator and
4905 require names are now matched exactly. I enabled the subaddress
4906 extension, but it is not well tested yet (read: it works for me)."
4908 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4909 rework some of the code of TK/09 above to avoid the hardwired use of
4910 "%lld" and "long long". Replaced the call to snprintf() with a call to
4913 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4914 records point to non-existent hosts", "retry timeout exceeded", and
4915 "retry time not reached for any host after a long failure period".
4917 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4918 experimental DomainKeys support:
4920 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4921 (2) On an error such as an illegally used "control", the wrong name for
4922 the control was given.
4924 These problems did NOT occur unless DomainKeys support was compiled.
4926 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4928 PH/24 Added ${if match_ip condition.
4930 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4931 databases so that it will be absolutely obvious if a crash occurs in the
4932 DB library. This is a regular occurrence (often caused by mis-matched
4935 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4936 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4937 picked up on a user's system that detects such things. There doesn't seem
4938 to be a gcc warning option for this - only an attribute that has to be
4939 put on the function's prototype. It seems that in Fedora Core 4 they have
4940 set this on a number of new functions. No doubt there will be more in due
4943 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4944 specify a transport. However, if an address that was verified by such a
4945 router was the subject of a callout, Exim crashed because it tried to
4946 read the rcpt_include_affixes from the non-existent transport. Now it
4947 just assumes that the setting of that option is false. This bug was
4948 introduced by 4.51/PH/31.
4950 PH/28 Changed -d+all to exclude +memory, because that information is very
4951 rarely of interest, but it makes the output a lot bigger. People tend to
4952 do -d+all out of habit.
4954 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4955 code in os-type was giving problems when libc.so lives in lib64, like on
4958 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4959 aren't the modern standard, and it seems that some systems' include files
4960 don't always have them. Exim was already checking for some of the newer
4961 ones like T_AAAA, and defining it itself. I've added checks for all the
4962 record types that Exim uses.
4964 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4965 not automatically generating a new one, as it is supposed to. This
4966 prevented TLS from working. If the file did exist, but contained invalid
4967 data, a new version was generated, as expected. It was only the case of a
4968 non-existent file that was broken.
4970 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4971 with a change in libdomainkeys > 0.64.
4973 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4974 from DNS. If the selector record carries the flag, it now has
4975 precedence over the domain-wide flag.
4977 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4979 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4980 the use of a port name that isn't defined in /etc/services) occurred, the
4981 message was deferred as in a normal delivery, and thus remained on the
4982 spool, instead of being failed because of the mua_wrapper setting. This
4983 is now fixed, and I tidied up some of the mua_wrapper messages at the
4986 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4987 the messages in a hash of arrays rather than using individual hashes.
4988 This is a bit cleaner and results in dramatic memory savings, albeit
4989 at a slight CPU cost.
4991 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4992 as requested by Marc Sherman.
4994 SC/10 Eximstats: added histograms for user specified patterns as requested
4997 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4999 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5000 fopen() in the content-scanning modules that did not already have it.
5006 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5007 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5009 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5011 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5013 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5014 to test Sieve filters that use "vacation".
5016 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5017 that changes the way the GnuTLS parameters are stored in the cache file.
5018 The new format can be generated externally. For backward compatibility,
5019 if the data in the cache doesn't make sense, Exim assumes it has read an
5020 old-format file, and it generates new data and writes a new file. This
5021 means that you can't go back to an older release without removing the
5024 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5025 work if there are any delivery delays because "one_time" forces the
5026 parent to be marked "delivered", so its unseen clone is never tried
5027 again. For this reason, Exim now forbids the simultaneous setting of
5030 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5031 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5032 entry if you want to know the details. The fix, however, neglected to
5033 consider the case when local delivery batching is involved. The test for
5034 "previously delivered" was not happening when checking to see if an
5035 address could be batched with a previous (undelivered) one; under
5036 certain circumstances this could lead to multiple deliveries to the same
5039 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5040 in its include files, and this causes problems building Exim.
5042 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5043 header_syntax) but Exim was just ignoring anything given after a slash.
5044 In particular, this caused confusion with an attempt to use "verify =
5045 reverse_host_lookup/defer_ok". An error is now given when options are
5046 supplied for verify items that do not have them. (Maybe reverse_host_
5047 lookup should have a defer_ok option, but that's a different point.)
5049 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5050 defined by RFC 821) to 2048, because there were problems with some AUTH
5051 commands, and RFC 1869 says the size should be increased for extended
5052 SMTP commands that take arguments.
5054 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5057 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5058 "unknown" error; now it says that the functionality isn't in the binary.
5060 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5061 an address' error message when a string expansion fails (syntax or
5062 whatever). Otherwise the password may appear in the log. Following change
5063 PH/42 below, there is no longer a chance of it appearing in a bounce
5066 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5068 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5069 of its addresses was ever tried. (Bugzilla bug #2.)
5071 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5072 the result incorrectly in the debug output. (It correctly added a newline
5073 to what was transported.)
5075 TF/01 Added $received_time.
5077 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5078 commented out examples of how to interface to a virus scanner and to
5079 SpamAssassin. Also added commented examples of av_scanner and
5080 spamd_address settings.
5082 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5083 and controls are allowed in which ACLs. There were a couple of minor
5084 errors. Some of the entries in the conditions table (which is a table of
5085 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5086 negation of where the condition IS allowed.
5088 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5090 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5091 header file does not have a version number, so I've had to invent a new
5092 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5093 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5094 radiusclient), but it was contributed by a Radius user.
5096 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5097 files or directories, for OpenSSL.
5099 PH/19 When an Exim process that is running as root has to create an Exim log
5100 file, it does so in a subprocess that runs as exim:exim so as to get the
5101 ownership right at creation (otherwise, other Exim processes might see
5102 the file with the wrong ownership). There was no test for failure of this
5103 fork() call, which would lead to the process getting stuck as it waited
5104 for a non-existent subprocess. Forks do occasionally fail when resources
5105 run out. I reviewed all the other calls to fork(); they all seem to check
5108 PH/20 When checking for unexpected SMTP input at connect time (before writing
5109 the banner), Exim was not dealing correctly with a non-positive return
5110 from the read() function. If the client had disconnected by this time,
5111 the result was a log entry for a synchronization error with an empty
5112 string after "input=" when read() returned zero. If read() returned -1
5113 (an event I could not check), uninitialized data bytes were printed.
5114 There were reports of junk text (parts of files, etc) appearing after
5117 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5119 PH/22 Added support for macro redefinition, and (re)definition in between
5120 driver and ACL definitions.
5122 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5123 forgetting to use the resulting value; it was using the unexpanded value.
5125 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5126 hadn't been configured. The fix is from Juergen Kreileder, who
5127 understands it better than I do:
5129 "Here's what I see happening with three configured cyrus_sasl
5130 authenticators configured (plain, login, cram-md5):
5132 On startup auth_cyrus_sasl_init() gets called for each of these.
5133 This means three calls to sasl_listmech() without a specified mech_list.
5134 => SASL tests which mechs of all available mechs actually work
5135 => three warnings about OTP not working
5136 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5138 With the patch, sasl_listmech() also gets called three times. But now
5139 SASL's mech_list option is set to the server_mech specified in the the
5140 authenticator. Or in other words, the answer from sasl_listmech()
5141 gets limited to just the mech you're testing for (which is different
5143 => the return list contains just 'plain' or 'login', 'cram-md5' or
5144 nothing depending on the value of ob->server_mech.
5146 I've just tested the patch: Authentication still works fine,
5147 unavailable mechs specified in the exim configuration are still
5148 caught, and the auth.log warnings about OTP are gone."
5150 PH/25 When debugging is enabled, the contents of the command line are added
5151 to the debugging output, even when log_selector=+arguments is not
5154 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5155 answer is "GNU", and only if the return is "GNU/something" is the answer
5158 PH/27 $acl_verify_message is now set immediately after the failure of a
5159 verification in an ACL, and so is available in subsequent modifiers. In
5160 particular, the message can be preserved by coding like this:
5162 warn !verify = sender
5163 set acl_m0 = $acl_verify_message
5165 Previously, $acl_verify_message was set only while expanding "message"
5166 and "log_message" when a very denied access.
5168 PH/28 Modified OS/os.c-Linux with
5170 -#ifndef OS_LOAD_AVERAGE
5171 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5173 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5174 nomenclature these days.)
5176 PH/29 Installed patch from the Sieve maintainer that adds the options
5177 sieve_useraddress and sieve_subaddress to the redirect router.
5179 PH/30 In these circumstances:
5180 . Two addresses routed to the same list of hosts;
5181 . First host does not offer TLS;
5182 . First host accepts first address;
5183 . First host gives temporary error to second address;
5184 . Second host offers TLS and a TLS session is established;
5185 . Second host accepts second address.
5186 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5187 and peerdn, if requested) that were in fact used only for the second
5190 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5191 attention to any local part prefix or suffix that was matched by the
5192 router that accepted the address. It now behaves in the same way as it
5193 does for delivery: the affixes are removed from the local part unless
5194 rcpt_include_affixes is set on the transport.
5196 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5197 timeout during the DATA phase of an incoming message.
5199 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5200 applied a patch sanctioned by the Sieve maintainer.
5202 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5203 the uid or gid is negative. A case of a negative gid caused this to be
5204 noticed. The fix allows for either to be negative.
5206 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5207 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5210 PH/36 The change PH/12 above was broken. Fixed it.
5212 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5213 the grounds that routing the same address twice would always produce the
5214 same answer. This might have been true once, but it is certainly no
5215 longer true now. Routing a child address may depend on the previous
5216 routing that produced that child. Some complicated redirection strategies
5217 went wrong when messages had multiple recipients, and made Exim's
5218 behaviour dependent on the order in which the addresses were given.
5220 I have moved the duplicate checking until after the routing is complete.
5221 Exim scans the addresses that are assigned to local and remote
5222 transports, and removes any duplicates. This means that more work will be
5223 done, as duplicates will always all be routed, but duplicates are
5224 presumably rare, so I don't expect this is of any significance.
5226 For deliveries to pipes, files, and autoreplies, the duplicate checking
5227 still happens during the routing process, since they are not going to be
5230 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5231 It corrects a timeout issue with spamd. This is Ian's comment: "The
5232 background is that sometimes spamd either never reads data from a
5233 connection it has accepted, or it never writes response data. The exiscan
5234 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5235 blindly assumes that writes won't block so it may never time out."
5237 PH/39 Allow G after quota size as well as K and M.
5239 PH/40 The value set for $authenticated_id in an authenticator may not contain
5240 binary zeroes or newlines because the value is written to log lines and
5241 to spool files. There was no check on this. Now the value is run through
5242 the string_printing() function so that such characters are converted to
5243 printable escape sequences.
5245 PH/41 $message_linecount is a new variable that contains the total number of
5246 lines in the message. Compare $body_linecount, which is the count for the
5249 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5250 bounce and delay warning messages, except in certain special cases, which
5253 (a) An SMTP error message from a remote host;
5254 (b) A message specified in a :fail: redirection;
5255 (c) A message specified in a "fail" command in a system filter;
5256 (d) A message specified in a FAIL return from the queryprogram router;
5257 (e) A message specified by the cannot_route_message router option.
5259 In these cases only, Exim does include the error details in bounce and
5260 warning messages. There are also a few cases where bland messages such
5261 as "unrouteable address" or "local delivery error" are given.
5263 PH/43 $value is now also set for the "else" part of a ${run expansion.
5265 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5266 being worked on, but at least Exim now implements the latest version to
5269 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5270 process to complete was treated as a delivery failure, a timeout while
5271 writing the message to the pipe was logged, but erroneously treated as a
5272 successful delivery. Such timeouts include transport filter timeouts. For
5273 consistency with the overall process timeout, these timeouts are now
5274 treated as errors, giving rise to delivery failures by default. However,
5275 there is now a new Boolean option for the pipe transport called
5276 timeout_defer, which, if set TRUE, converts the failures into defers for
5277 both kinds of timeout. A transport filter timeout is now identified in
5280 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5281 systems where "make" and "gmake" are different, calling "gmake" at top
5282 level broke things. I've arranged for the value of $(MAKE) to be passed
5283 from the Makefile to this script so that it can call the same version of
5287 A note about Exim versions 4.44 and 4.50
5288 ----------------------------------------
5290 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5291 changes of various kinds. As a consequence, a big documentation update was
5292 needed. This delayed the release for rather longer than seemed good, especially
5293 in the light of a couple of (minor) security issues. Therefore, the changes
5294 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5295 release. So 4.44 and 4.50 are in effect two different branches that both start
5298 I have left the 4.50 change log unchanged; it contains all the changes since
5299 4.43. The change log for 4.44 is below; many of its items are identical to
5300 those for 4.50. This seems to be the most sensible way to preserve the
5301 historical information.
5307 1. Minor wording change to the doc/README.SIEVE file.
5309 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5310 computation of the current number of files was incorrect.
5312 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5313 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5316 4. Give more explanation in the error message when the command for a transport
5317 filter fails to execute.
5319 5. There are several places where Exim runs a non-Exim command in a
5320 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5321 was being done only for the command run by the queryprogram router. It is
5322 now done for all such subprocesses. The other cases are: ${run, transport
5323 filters, and the commands run by the lmtp and pipe transports.
5325 6. Added CONFIGURE_GROUP build-time option.
5327 7. Some older OS have a limit of 256 on the maximum number of file
5328 descriptors. Exim was using setrlimit() to set 1000 as a large value
5329 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5330 systems. I've change it so that if it can't get 1000, it tries for 256.
5332 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5333 was an oversight, and furthermore, ever since the addition of extra
5334 controls (e.g. 4.43/32), the checks on when to allow different forms of
5335 "control" were broken. There should now be diagnostics for all cases when a
5336 control that does not make sense is encountered.
5338 9. Added the /retain_sender option to "control=submission".
5340 10. $recipients is now available in the predata ACL (oversight).
5342 11. Tidy the search cache before the fork to do a delivery from a message
5343 received from the command line. Otherwise the child will trigger a lookup
5344 failure and thereby defer the delivery if it tries to use (for example) a
5345 cached ldap connection that the parent has called unbind on.
5347 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5348 of $address_data from the recipient verification was clobbered by the
5349 sender verification.
5351 13. The value of address_data from a sender verification is now available in
5352 $sender_address_data in subsequent conditions in the ACL statement.
5354 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5356 15. Added a new option "connect=<time>" to callout options, to set a different
5359 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5360 was its contents. (It was OK if the option was not defined at all.)
5362 17. A "Completed" log line is now written for messages that are removed from
5363 the spool by the -Mrm option.
5365 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5366 information about exactly what failed.
5368 19. Added -dd to debug only the daemon process.
5370 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5371 handles timeouts, both on the server side and network timeouts. Renamed the
5372 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5374 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5375 It is now set to "smtps".
5377 22. $host_address is now set to the target address during the checking of
5378 ignore_target_hosts.
5380 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5381 being passed; this would have caused $sender_host_name to have been used if
5382 matching the list had actually called for a host name (not very likely,
5383 since this list is usually IP addresses). A host name is now passed as
5386 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5387 code that specifies a non-restarting handler (typically sigaction() in
5388 modern systems) in an attempt to fix a rare and obscure crash bug.
5390 25. Narrowed the window for a race in the daemon that could cause it to ignore
5391 SIGCHLD signals. This is not a major problem, because they are used only to
5392 wake it up if nothing else does.
5394 26. A malformed maildirsize file could cause Exim to calculate negative values
5395 for the mailbox size or file count. Odd effects could occur as a result.
5396 The maildirsize information is now recalculated if the size or filecount
5399 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5400 support for a long time. Removed HAVE_SYS_VFS_H.
5402 28. Installed the latest version of exipick from John Jetmore.
5404 29. In an address list, if the pattern was not a regular expression, an empty
5405 subject address (from a bounce message) matched only if the pattern was an
5406 empty string. Non-empty patterns were not even tested. This was the wrong
5407 because it is perfectly reasonable to use an empty address as part of a
5408 database query. An empty address is now tested by patterns that are
5409 lookups. However, all the other forms of pattern expect the subject to
5410 contain a local part and a domain, and therefore, for them, an empty
5411 address still always fails if the pattern is not itself empty.
5413 30. Exim went into a mad DNS loop when attempting to do a callout where the
5414 host was specified on an smtp transport, and looking it up yielded more
5415 than one IP address.
5417 31. Re-factored the code for checking spool and log partition space into a
5418 function that finds that data and another that does the check. The former
5419 is then used to implement four new variables: $spool_space, $log_space,
5420 $spool_inodes, and $log_inodes.
5422 32. The RFC2047 encoding function was originally intended for short strings
5423 such as real names; it was not keeping to the 75-character limit for
5424 encoded words that the RFC imposes. It now respects the limit, and
5425 generates multiple encoded words if necessary. To be on the safe side, I
5426 have increased the buffer size for the ${rfc2047: expansion operator from
5429 33. It is now permitted to omit both strings after an "if" condition; if the
5430 condition is true, the result is "true". As before, when the second string
5431 is omitted, a false condition yields an empty string. This makes it less
5432 cumbersome to write custom ACL and router conditions.
5434 34. Failure to deliver a bounce message always caused it to be frozen, even if
5435 there was an errors_to setting on the router. The errors_to setting is now
5438 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5439 canonical form (fully expanded) before being placed in
5440 $sender_host_address.
5442 36. The table in the code that translates DNS record types into text (T_A to
5443 "A" for instance) was missing entries for NS and CNAME. It is just possible
5444 that this could have caused confusion if both these types were looked up
5445 for the same domain, because the text type is used as part of Exim's
5446 per-process caching. But the chance of anyone hitting this buglet seems
5449 37. The dnsdb lookup has been extended in a number of ways.
5451 (1) There is a new type, "zns", which walks up the domain tree until it
5452 finds some nameserver records. It should be used with care.
5454 (2) There is a new type, "mxh", which is like "mx" except that it returns
5455 just the host names, not the priorities.
5457 (3) It is now possible to give a list of domains (or IP addresses) to be
5458 looked up. The behaviour when one of the lookups defers can be
5459 controlled by a keyword.
5461 (4) It is now possible to specify the separator character for use when
5462 multiple records are returned.
5464 38. The dnslists ACL condition has been extended: it is now possible to supply
5465 a list of IP addresses and/or domains to be looked up in a particular DNS
5468 39. Added log_selector=+queue_time_overall.
5470 40. When running the queue in the test harness, wait just a tad after forking a
5471 delivery process, to get repeatability of debugging output.
5473 41. Include certificate and key file names in error message when GnuTLS fails
5474 to set them up, because the GnuTLS error message doesn't include the name
5475 of the failing file when there is a problem reading it.
5477 42. Allow both -bf and -bF in the same test run.
5479 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5481 44. The "Exiscan patch" is now merged into the mainline Exim source.
5483 45. Sometimes the final signoff response after QUIT could fail to get
5484 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5485 < 0 before doing a fflush(). This bug looks as though it goes back to the
5486 introduction of TLS in release 3.20, but "sometimes" must have been rare
5487 because the tests only now provoked it.
5489 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5490 (this can affect the format of dates).
5492 47. exim_tidydb, when checking for the continued existence of a message for
5493 which it has found a message-specific retry record, was not finding
5494 messages that were in split spool directories. Consequently, it was
5495 deleting retry records that should have stayed in existence.
5497 48. Steve fixed some bugs in eximstats.
5499 49. The SPA authentication driver was not abandoning authentication and moving
5500 on to the next authenticator when an expansion was forced to fail,
5501 contradicting the general specification for all authenticators. Instead it
5502 was generating a temporary error. It now behaves as specified.
5504 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5505 (the order specifies the preference for clients). The order is now AES256,
5506 AES128, 3DES, ARCFOUR128.
5508 51. Small patch to Sieve code - explicitly set From: when generating an
5511 52. Exim crashed if a remote delivery caused a very long error message to be
5512 recorded - for instance if somebody sent an entire SpamAssassin report back
5513 as a large number of 550 error lines. This bug was coincidentally fixed by
5514 increasing the size of one of Exim's internal buffers (big_buffer) that
5515 happened as part of the Exiscan merge. However, to be on the safe side, I
5516 have made the code more robust (and fixed the comments that describe what
5519 53. Now that there can be additional text after "Completed" in log lines (if
5520 the queue_time_overall log selector is set), a one-byte patch to exigrep
5521 was needed to allow it to recognize "Completed" as not the last thing in
5524 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5525 patch that reportedly fixes this has been added. I am not expert enough to
5526 create a test for it. This is what the patch creator wrote:
5528 "I found a little strange behaviour of ldap code when working with
5529 Windows 2003 AD Domain, where users was placed in more than one
5530 Organization Units. When I tried to give exim partial DN, the exit code
5531 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5532 But simultaneously result of request was absolutely normal ldap result,
5533 so I produce this patch..."
5535 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5536 REFERENCE, so I have modified the code to exclude the patch when that macro
5539 55. Some experimental protocols are using DNS PTR records for new purposes. The
5540 keys for these records are domain names, not reversed IP addresses. The
5541 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5542 leaves it alone. Component reversal etc. now happens only for IP addresses.
5545 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5547 57. Double the size of the debug message buffer (to 2048) so that more of very
5548 long debug lines gets shown.
5550 58. The exicyclog utility now does better if the number of log files to keep
5551 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5553 59. Two changes related to the smtp_active_hostname option:
5555 (1) $smtp_active_hostname is now available as a variable.
5556 (2) The default for smtp_banner uses $smtp_active_hostname instead
5557 of $primary_hostname.
5559 60. The host_aton() function is supposed to be passed a string that is known
5560 to be a valid IP address. However, in the case of IPv6 addresses, it was
5561 not checking this. This is a hostage to fortune. Exim now panics and dies
5562 if the condition is not met. A case was found where this could be provoked
5563 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5564 components; fortuitously, this particular loophole had already been fixed
5565 by change 4.50/55 above.
5567 If there are any other similar loopholes, the new check in host_aton()
5568 itself should stop them being exploited. The report I received stated that
5569 data on the command line could provoke the exploit when Exim was running as
5570 exim, but did not say which command line option was involved. All I could
5571 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5572 running as the user.
5575 61. There was a buffer overflow vulnerability in the SPA authentication code
5576 (which came originally from the Samba project). I have added a test to the
5577 spa_base64_to_bits() function which I hope fixes it.
5580 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5581 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5583 63. The daemon start-up calls getloadavg() while still root for those OS that
5584 need the first call to be done as root, but it missed one case: when
5585 deliver_queue_load_max is set with deliver_drop_privilege. This is
5586 necessary for the benefit of the queue runner, because there is no re-exec
5587 when deliver_drop_privilege is set.
5589 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5590 This has been fixed.
5592 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5593 was in use, was not putting the data itself into the right store pool;
5594 consequently, it could be overwritten for a subsequent message in the same
5595 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5598 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5600 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5601 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5602 the function were treating the return as a boolean value, which happened to
5603 work because 0=false and not-0=true, but is not correct code.
5605 68. The host_aton() function was not handling scoped IPv6 addresses (those
5606 with, for example, "%eth0" on the end) correctly.
5608 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5609 negated items (that is, ~something) in unsigned ints. Some compilers
5610 apparently mutter when there is no cast.
5612 70. If an address verification called from an ACL failed, and did not produce a
5613 user-specific message (i.e. there was only a "system" message), nothing was
5614 put in $acl_verify_message. In this situation, it now puts the system
5617 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5618 session; change 4.31/43 added the unwanted input to the log line - except
5619 that it did not do this in the start of session case. It now does.
5621 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5622 This is wrong and can cause the other end to generate a synchronization
5623 error if it is another Exim or anything else that does the synchronization
5624 check. A QUIT command is no longer sent after a timeout.
5626 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5627 during host lookups.
5629 74. The defer_ok option of callout verification was not working if it was used
5630 when verifying addresses in header lines, that is, for this case:
5632 verify = header_sender/callout=defer_ok
5634 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5635 those file descriptors could be used for SMTP connections. If anything
5636 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5637 could be sent to the SMTP client, causing chaos. The daemon now opens
5638 stdin, stdout, and stderr to /dev/null when it puts itself into the
5641 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5642 log by default. The user can override this with suitable Perl magic.
5644 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5645 the log message when discard triggers, was not working for the DATA ACL or
5646 for the non-SMTP ACL.
5648 78. Error message wording change in sieve.c.
5650 79. If smtp_accept_max_per_host was set, the number of connections could be
5651 restricted to fewer than expected, because the daemon was trying to set up
5652 a new connection before checking whether the processes handling previous
5653 connections had finished. The check for completed processes is now done
5654 earlier. On busy systems, this bug wouldn't be noticed because something
5655 else would have woken the daemon, and it would have reaped the completed
5658 80. If a message was submitted locally by a user whose login name contained one
5659 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5660 It caused a spool format error. I have fixed the spool reading code. A
5661 related problem was that the "from" clause in the Received: line became
5662 illegal because of the space(s). It is now covered by ${quote_local_part.
5664 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5667 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5669 83. Patch from Sieve maintainer to fix unterminated string problem in
5670 "vacation" handling.
5672 84. Some minor changes to the Linux configuration files to help with other
5673 OS variants using glibc.
5675 85. One more patch for Sieve to update vacation handling to latest spec.
5678 ----------------------------------------------------
5679 See the note above about the 4.44 and 4.50 releases.
5680 ----------------------------------------------------
5686 1. Change 4.43/35 introduced a bug that caused file counts to be
5687 incorrectly computed when quota_filecount was set in an appendfile
5690 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5691 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5694 3. Give more explanation in the error message when the command for a transport
5695 filter fails to execute.
5697 4. There are several places where Exim runs a non-Exim command in a
5698 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5699 was being done only for the command run by the queryprogram router. It is
5700 now done for all such subprocesses. The other cases are: ${run, transport
5701 filters, and the commands run by the lmtp and pipe transports.
5703 5. Some older OS have a limit of 256 on the maximum number of file
5704 descriptors. Exim was using setrlimit() to set 1000 as a large value
5705 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5706 systems. I've change it so that if it can't get 1000, it tries for 256.
5708 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5709 was an oversight, and furthermore, ever since the addition of extra
5710 controls (e.g. 4.43/32), the checks on when to allow different forms of
5711 "control" were broken. There should now be diagnostics for all cases when a
5712 control that does not make sense is encountered.
5714 7. $recipients is now available in the predata ACL (oversight).
5716 8. Tidy the search cache before the fork to do a delivery from a message
5717 received from the command line. Otherwise the child will trigger a lookup
5718 failure and thereby defer the delivery if it tries to use (for example) a
5719 cached ldap connection that the parent has called unbind on.
5721 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5722 of $address_data from the recipient verification was clobbered by the
5723 sender verification.
5725 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5726 was its contents. (It was OK if the option was not defined at all.)
5728 11. A "Completed" log line is now written for messages that are removed from
5729 the spool by the -Mrm option.
5731 12. $host_address is now set to the target address during the checking of
5732 ignore_target_hosts.
5734 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5735 being passed; this would have caused $sender_host_name to have been used if
5736 matching the list had actually called for a host name (not very likely,
5737 since this list is usually IP addresses). A host name is now passed as
5740 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5741 code that specifies a non-restarting handler (typically sigaction() in
5742 modern systems) in an attempt to fix a rare and obscure crash bug.
5744 15. Narrowed the window for a race in the daemon that could cause it to ignore
5745 SIGCHLD signals. This is not a major problem, because they are used only to
5746 wake it up if nothing else does.
5748 16. A malformed maildirsize file could cause Exim to calculate negative values
5749 for the mailbox size or file count. Odd effects could occur as a result.
5750 The maildirsize information is now recalculated if the size or filecount
5753 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5754 support for a long time. Removed HAVE_SYS_VFS_H.
5756 18. Updated exipick to current release from John Jetmore.
5758 19. Allow an empty sender to be matched against a lookup in an address list.
5759 Previously the only cases considered were a regular expression, or an
5762 20. Exim went into a mad DNS lookup loop when doing a callout where the
5763 host was specified on the transport, if the DNS lookup yielded more than
5766 21. The RFC2047 encoding function was originally intended for short strings
5767 such as real names; it was not keeping to the 75-character limit for
5768 encoded words that the RFC imposes. It now respects the limit, and
5769 generates multiple encoded words if necessary. To be on the safe side, I
5770 have increased the buffer size for the ${rfc2047: expansion operator from
5773 22. Failure to deliver a bounce message always caused it to be frozen, even if
5774 there was an errors_to setting on the router. The errors_to setting is now
5777 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5778 canonical form (fully expanded) before being placed in
5779 $sender_host_address.
5781 24. Updated eximstats to version 1.33
5783 25. Include certificate and key file names in error message when GnuTLS fails
5784 to set them up, because the GnuTLS error message doesn't include the name
5785 of the failing file when there is a problem reading it.
5787 26. Expand error message when OpenSSL has problems setting up cert/key files.
5790 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5791 (this can affect the format of dates).
5793 28. exim_tidydb, when checking for the continued existence of a message for
5794 which it has found a message-specific retry record, was not finding
5795 messages that were in split spool directories. Consequently, it was
5796 deleting retry records that should have stayed in existence.
5798 29. eximstats updated to version 1.35
5799 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5800 1.35 - bugfix such that pie charts by volume are generated correctly
5802 30. The SPA authentication driver was not abandoning authentication and moving
5803 on to the next authenticator when an expansion was forced to fail,
5804 contradicting the general specification for all authenticators. Instead it
5805 was generating a temporary error. It now behaves as specified.
5807 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5808 (the order specifies the preference for clients). The order is now AES256,
5809 AES128, 3DES, ARCFOUR128.
5811 31. Small patch to Sieve code - explicitly set From: when generating an
5814 32. Exim crashed if a remote delivery caused a very long error message to be
5815 recorded - for instance if somebody sent an entire SpamAssassin report back
5816 as a large number of 550 error lines. This bug was coincidentally fixed by
5817 increasing the size of one of Exim's internal buffers (big_buffer) that
5818 happened as part of the Exiscan merge. However, to be on the safe side, I
5819 have made the code more robust (and fixed the comments that describe what
5822 33. Some experimental protocols are using DNS PTR records for new purposes. The
5823 keys for these records are domain names, not reversed IP addresses. The
5824 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5825 leaves it alone. Component reversal etc. now happens only for IP addresses.
5828 34. The host_aton() function is supposed to be passed a string that is known
5829 to be a valid IP address. However, in the case of IPv6 addresses, it was
5830 not checking this. This is a hostage to fortune. Exim now panics and dies
5831 if the condition is not met. A case was found where this could be provoked
5832 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5833 components; fortuitously, this particular loophole had already been fixed
5834 by change 4.50/55 or 4.44/33 above.
5836 If there are any other similar loopholes, the new check in host_aton()
5837 itself should stop them being exploited. The report I received stated that
5838 data on the command line could provoke the exploit when Exim was running as
5839 exim, but did not say which command line option was involved. All I could
5840 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5841 running as the user.
5844 35. There was a buffer overflow vulnerability in the SPA authentication code
5845 (which came originally from the Samba project). I have added a test to the
5846 spa_base64_to_bits() function which I hope fixes it.
5849 36. The daemon start-up calls getloadavg() while still root for those OS that
5850 need the first call to be done as root, but it missed one case: when
5851 deliver_queue_load_max is set with deliver_drop_privilege. This is
5852 necessary for the benefit of the queue runner, because there is no re-exec
5853 when deliver_drop_privilege is set.
5855 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5856 was in use, was not putting the data itself into the right store pool;
5857 consequently, it could be overwritten for a subsequent message in the same
5858 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5861 38. Sometimes the final signoff response after QUIT could fail to get
5862 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5863 < 0 before doing a fflush(). This bug looks as though it goes back to the
5864 introduction of TLS in release 3.20, but "sometimes" must have been rare
5865 because the tests only now provoked it.
5871 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5872 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5873 Now it returns an integer. A number of calls were still expecting a T/F
5874 return. Fortuitously, in all cases, the tests worked in OK situations,
5875 which is the norm. However, things would have gone wrong on any write
5876 failures on the smtp file descriptor. This function is used when sending
5877 messages over SMTP and also when doing verify callouts.
5879 2. When Exim is called to do synchronous delivery of a locally submitted
5880 message (the -odf or -odi options), it no longer closes stderr before doing
5883 3. Implemented the mua_wrapper option.
5885 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5887 5. Implemented the functions header_remove(), header_testname(),
5888 header_add_at_position(), and receive_remove_recipient(), and exported them
5891 6. If an ACL "warn" statement specified the addition of headers, Exim already
5892 inserted X-ACL-Warn: at the start if there was no header name. However, it
5893 was not making this test for the second and subsequent header lines if
5894 there were newlines in the string. This meant that an invalid header could
5895 be inserted if Exim was badly configured.
5897 7. Allow an ACL "warn" statement to add header lines at the start or after all
5898 the Received: headers, as well as at the end.
5900 8. Added the rcpt_4xx retry error code.
5902 9. Added postmaster_mailfrom=xxx to callout verification option.
5904 10. Added mailfrom=xxxx to the callout verification option, for verify=
5907 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5908 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5910 12. Inserted some casts to stop certain compilers warning when using pointer
5911 differences as field lengths or precisions in printf-type calls (mostly
5912 affecting debugging statements).
5914 13. Added optional readline() support for -be (dynamically loaded).
5916 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5917 same clock tick as a message's arrival, so that its received time was the
5918 same as the "first fail" time on the retry record, and that message
5919 remained on the queue past the ultimate address timeout, every queue runner
5920 would try a delivery (because it was past the ultimate address timeout) but
5921 after another failure, the ultimate address timeout, which should have then
5922 bounced the address, did not kick in. This was a "< instead of <=" error;
5923 in most cases the first failure would have been in the next clock tick
5924 after the received time, and all would be well.
5926 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5927 being recognized when the domain list was tested by the match_domain
5928 condition in an expansion string.
5930 16. Added the ${str2b64: operator.
5932 17. Exim was always calling setrlimit() to set a large limit for the number of
5933 processes, without checking whether the existing limit was already
5934 adequate. (It did check for the limit on file descriptors.) Furthermore,
5935 errors from getrlimit() and setrlimit() were being ignored. Now they are
5936 logged to the main and panic logs, but Exim does carry on, to try to do its
5937 job under whatever limits there are.
5939 18. Imported PCRE 5.0.
5941 19. Trivial typo in log message " temporarily refused connection" (the leading
5944 20. If the log selector return_path_on_delivery was set and an address was
5945 redirected to /dev/null, the delivery process crashed because it assumed
5946 that a return path would always be set for a "successful" delivery. In this
5947 case, the whole delivery is bypassed as an optimization, and therefore no
5950 21. Internal re-arrangement: the function for sending a challenge and reading
5951 a response while authentication was assuming a zero-terminated challenge
5952 string. It's now changed to take a pointer and a length, to allow for
5953 binary data in such strings.
5955 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5957 23. Exim was not respecting finduser_retries when seeking the login of the
5958 uid under which it was called; it was always trying 10 times. (The default
5959 setting of finduser_retries is zero.) Also, it was sleeping after the final
5960 failure, which is pointless.
5962 24. Implemented tls_on_connect_ports.
5964 25. Implemented acl_smtp_predata.
5966 26. If the domain in control=submission is set empty, Exim assumes that the
5967 authenticated id is a complete email address when it generates From: or
5968 Sender: header lines.
5970 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5971 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5972 chown and chgrp in /bin and hostname in /usr/bin.
5974 28. Exim was keeping the "process log" file open after each use, just as it
5975 does for the main log. This opens the possibility of it remaining open for
5976 long periods when the USR1 signal hits a daemon. Occasional processlog
5977 errors were reported, that could have been caused by this. Anyway, it seems
5978 much more sensible not to leave this file open at all, so that is what now
5981 29. The long-running daemon process does not normally write to the log once it
5982 has entered its main loop, and it closes the log before doing so. This is
5983 so that log files can straightforwardly be renamed and moved. However,
5984 there are a couple of unusual error situations where the daemon does write
5985 log entries, and I had neglected to close the log afterwards.
5987 30. The text of an SMTP error response that was received during a remote
5988 delivery was being truncated at 512 bytes. This is too short for some of
5989 the long messages that one sometimes sees. I've increased the limit to
5992 31. It is now possible to make retry rules that apply only when a message has a
5993 specific sender, in particular, an empty sender.
5995 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5996 it possible to be selective about when SMTP synchronization is enforced.
5998 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6000 32. Implemented hosts_connection_nolog.
6002 33. Added an ACL for QUIT.
6004 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6007 35. Added mailbox_size and mailbox_filecount to appendfile.
6009 36. Added control = no_multiline_responses to ACLs.
6011 37. There was a bug in the logic of the code that waits for the clock to tick
6012 in the case where the clock went backwards by a substantial amount such
6013 that the microsecond fraction of "now" was more than the microsecond
6014 fraction of "then" (but the whole seconds number was less).
6016 38. Added support for the libradius Radius client library this is found on
6017 FreeBSD (previously only the radiusclient library was supported).
6023 1. When certain lookups returned multiple values in the form name=value, the
6024 quoting of the values was not always being done properly. Specifically:
6025 (a) If the value started with a double quote, but contained no whitespace,
6027 (b) If the value contained whitespace other than a space character (i.e.
6028 tabs or newlines or carriage returns) it was not quoted.
6029 This fix has been applied to the mysql and pgsql lookups by writing a
6030 separate quoting function and calling it from the lookup code. The fix
6031 should probably also be applied to nisplus, ibase and oracle lookups, but
6032 since I cannot test any of those, I have not disturbed their existing code.
6034 2. A hit in the callout cache for a specific address caused a log line with no
6035 reason for rejecting RCPT. Now it says "Previous (cached) callout
6036 verification failure".
6038 3. There was an off-by-one bug in the queryprogram router. An over-long
6039 return line was truncated at 256 instead of 255 characters, thereby
6040 overflowing its buffer with the terminating zero. As well as fixing this, I
6041 have increased the buffer size to 1024 (and made a note to document this).
6043 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6044 when Exim is waiting for an SMTP response from a remote server, Exim
6045 restarts its select() call on the socket, thereby resetting its timeout.
6046 This is not a problem when such interrupts are rare. Somebody set up a cron
6047 job to run exiwhat every 2 minutes, which is less than the normal select()
6048 timeout (5 or 10 minutes). This meant that the select() timeout never
6049 kicked in because it was always reset. I have fixed this by comparing the
6050 time when an interrupt arrives with the time at the start of the first call
6051 to select(). If more time than the timeout has elapsed, the interrupt is
6052 treated as a timeout.
6054 5. Some internal re-factoring in preparation for the addition of Sieve
6055 extensions (by MH). In particular, the "personal" test is moved to a
6056 separate function, and given an option for scanning Cc: and Bcc: (which is
6057 not set for Exim filters).
6059 6. When Exim created an email address using the login of the caller as the
6060 local part (e.g. when creating a From: or Sender: header line), it was not
6061 quoting the local part when it contained special characters such as @.
6063 7. Installed new OpenBSD configuration files.
6065 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6066 try to make them clearer.
6068 9. Callout options, other than the timeout value, were being ignored when
6069 verifying sender addresses in header lines. For example, when using
6071 verify = header_sender/callout=no_cache
6073 the cache was (incorrectly) being used.
6075 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6076 only the Cygwin environment.
6078 11. When return_path_on_delivery was set as a log selector, if different remote
6079 addresses in the same message used different return paths and parallel
6080 remote delivery occurred, the wrong values would sometimes be logged.
6081 (Whenever a remote delivery process finished, the return path value from
6082 the most recently started remote delivery process was logged.)
6084 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6085 lines when AUTH and/or TLS are in use. This is the "received protocol"
6086 field. Exim used to use "asmtp" for authenticated SMTP, without any
6087 indication (in the protocol name) for TLS use. Now it follows the RFC and
6088 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6089 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6090 names appear in log lines as well as in Received: header lines.
6092 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6093 extensions, and comparison tests, and to fix some bugs.
6095 14. Changes to the "personal" filter test:
6097 (1) The test was buggy in that it was just doing the equivalent of
6098 "contains" tests on header lines. For example, if a user's address was
6099 anne@some.where, the "personal" test would incorrectly be true for
6101 To: susanne@some.where
6103 This test is now done by extracting each address from the header in turn,
6104 and checking the entire address. Other tests that are part of "personal"
6105 are now done using regular expressions (for example, to check local parts
6106 of addresses in From: header lines).
6108 (2) The list of non-personal local parts in From: addresses has been
6109 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6110 taken from the Sieve specification recommendations.
6112 (3) If the message contains any header line starting with "List-" it is
6113 treated as non-personal.
6115 (4) The test for "circular" in the Subject: header line has been removed
6116 because it now seems ill-conceived.
6118 15. Minor typos in src/EDITME comments corrected.
6120 16. Installed latest exipick from John Jetmore.
6122 17. If headers_add on a router specified a text string that was too long for
6123 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6124 of string_sprintf() is now avoided.
6126 18. $message_body_size was not set (it was always zero) when running the DATA
6127 ACL and the local_scan() function.
6129 19. For the "mail" command in an Exim filter, no default was being set for
6130 the once_repeat time, causing a random time value to be used if "once" was
6131 specified. (If the value happened to be <= 0, no repeat happened.) The
6132 default is now 0s, meaning "never repeat". The "vacation" command was OK
6133 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6134 (I found it when inspecting the code).
6136 20. There is now an overall timeout for performing a callout verification. It
6137 defaults to 4 times the callout timeout, which applies to individual SMTP
6138 commands during the callout. The overall timeout applies when there is more
6139 than one host that can be tried. The timeout is checked before trying the
6140 next host. This prevents very long delays if there are a large number of
6141 hosts and all are timing out (e.g. when the network connections are timing
6142 out). The value of the overall timeout can be changed by specifying an
6143 additional sub-option for "callout", called "maxwait". For example:
6145 verify = sender/callout=5s,maxwait=20s
6147 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6148 to the end before writing, but this should make it even safer).
6150 22. Exim was forgetting that it had advertised PIPELINING for the second and
6151 subsequent messages on an SMTP connection. It was also not resetting its
6152 memory on STARTTLS and an internal HELO.
6154 23. When Exim logs an SMTP synchronization error within a session, it now
6155 records whether PIPELINING has been advertised or not.
6157 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6158 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6159 rather than long int.
6161 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6163 26. Added the never_mail option to autoreply.
6169 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6170 crash if the getsockname() call failed; this can happen if a connection is
6171 closed very soon after it is established. The problem was simply in the
6172 order in which certain operations were done, causing Exim to try to write
6173 to the SMTP stream before it had set up the file descriptor. The bug has
6174 been fixed by making things happen in the correct order.
6180 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6181 before the connection was closed, thus losing the rejection response.
6183 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6184 some early Solaris releases, but causes trouble in current releases where
6185 socklen_t is defined.
6187 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6190 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6193 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6194 that releasing the top of it at the end releases what was used for sub-
6195 expansions (unless the block got too big). However, discard this block if
6196 the first thing is a variable or header, so that we can use its block when
6197 it is dynamic (useful for very large $message_headers, for example).
6199 6. Lookups now cache *every* query, not just the most recent. A new, separate
6200 store pool is used for this. It can be recovered when all lookup caches are
6201 flushed. Lookups now release memory at the end of their result strings.
6202 This has involved some general refactoring of the lookup sources.
6204 7. Some code has been added to the store_xxx() functions to reduce the amount
6205 of flapping under certain conditions.
6207 8. log_incoming_interface used to affect only the <= reception log lines. Now
6208 it causes the local interface and port to be added to several more SMTP log
6209 lines, for example "SMTP connection from", and rejection lines.
6211 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6213 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6215 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6216 could be overwritten at the end of the current message (or the start of a
6217 new message if it was set in a HELO ACL). The value is now preserved for
6218 the duration of the SMTP connection.
6220 12. If a transport had a headers_rewrite setting, and a matching header line
6221 contained an unqualified address, that address was qualified, even if it
6222 did not match any rewriting rules. The underlying bug was that the values
6223 of the flags that permit the existence of unqualified sender and recipient
6224 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6225 non-local messages, and by -bnq for local messages) were not being
6226 preserved with the message after it was received.
6228 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6229 "next input=" as part of the text comprising the host identity instead of
6230 the correct text. The code was using the same buffer for two different
6231 strings. However, depending on which order the printing function evaluated
6232 its arguments, the bug did not always show up. Under Linux, for example, my
6233 test suite worked just fine.
6235 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6236 doesn't work with some older versions of Perl. It has been changed to "my",
6237 which in any case is probably the better facility to use.
6239 15. A really picky compiler found some instances of statements for creating
6240 error messages that either had too many or two few arguments for the format
6243 16. The size of the buffer for calls to the DNS resolver has been increased
6244 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6245 for addresses that have a lot of PTR records. This alleviates a problem; it
6246 does not fully solve it.
6248 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6249 buffer now truncates the list and logs the incident, which is the same
6250 action as happens when Exim is looking up a host name and its aliases.
6251 Previously in this situation something unpredictable would happen;
6252 sometimes it was "internal error: store_reset failed".
6254 18. If a server dropped the connection unexpectedly when an Exim client was
6255 using GnuTLS and trying to read a response, the client delivery process
6256 crashed while trying to generate an error log message.
6258 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6259 string, for example:
6261 warn message = H1: something\nH2: something
6263 the text was added as a single header line from Exim's point of view
6264 though it ended up OK in the delivered message. However, searching for the
6265 second and subsequent header lines using $h_h2: did not work. This has been
6266 fixed. Similarly, if a system filter added multiple headers in this way,
6267 the routers could not see them.
6269 20. Expanded the error message when iplsearch is called with an invalid key to
6270 suggest using net-iplsearch in a host list.
6272 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6273 ACLs are no longer actually imposed (and a message to that effect is
6276 22. If a "gecos" field in a passwd entry contained escaped characters, in
6277 particular, if it contained a \" sequence, Exim got it wrong when building
6278 a From: or a Sender: header from that name. A second bug also caused
6279 incorrect handling when an unquoted " was present following a character
6280 that needed quoting.
6282 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6283 was not being matched caselessly.
6285 24. Arranged for all hyphens in the exim.8 source to be escaped with
6288 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6289 properly. Recipient callout cache records were still being keyed to include
6290 the sender, even when use_sender was set false. This led to far more
6291 callouts that were necessary. The sender is no longer included in the key
6292 when use_sender is false.
6294 26. Added "control = submission" modifier to ACLs.
6296 27. Added the ${base62d: operator to decode base 62 numbers.
6298 28. dnsdb lookups can now access SRV records.
6300 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6301 the configuration file.
6303 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6304 (-v) mode. This makes the output for a verbose queue run more intelligible.
6306 31. Added a use_postmaster feature to recipient callouts.
6308 32. Added the $body_zerocount variable, containing the number of binary zero
6309 bytes in the message body.
6311 33. The time of last modification of the "new" subdirectory is now used as the
6312 "mailbox time last read" when there is a quota error for a maildir
6315 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6317 35. Added +ignore_unknown as a special item in host lists.
6319 36. Code for decoding IPv6 addresses in host lists is now included, even if
6320 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6321 address was recognized as an IP address, but was then not correctly decoded
6322 into binary, causing unexpected and incorrect effects when compared with
6329 1. Very minor rewording of debugging text in manualroute to say "list of
6330 hosts" instead of "hostlist".
6332 2. If verify=header_syntax was set, and a header line with an unqualified
6333 address (no domain) and a large number of spaces between the end of the
6334 name and the colon was received, the reception process suffered a buffer
6335 overflow, and (when I tested it) crashed. This was caused by some obsolete
6336 code that should have been removed. The fix is to remove it!
6338 3. When running in the test harness, delay a bit after writing a bounce
6339 message to get a bit more predictability in the log output.
6341 4. Added a call to search_tidyup() just before forking a reception process. In
6342 theory, someone could use a lookup in the expansion of smtp_accept_max_
6343 per_host which, without the tidyup, could leave open a database connection.
6345 5. Added the variables $recipient_data and $sender_data which get set from a
6346 lookup success in an ACL "recipients" or "senders" condition, or a router
6347 "senders" option, similar to $domain_data and $local_part_data.
6349 6. Moved the writing of debug_print from before to after the "senders" test
6352 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6353 problems for message scanning, either using a data ACL, or using
6354 local_scan() because the Received: header was not generated till after they
6355 were called (in order to set the time as the time of reception completion).
6356 I have revised the way this works. The header is now generated after the
6357 body is received, but before the ACL or local_scan() are called. After they
6358 are run, the timestamp in the header is updated.
6364 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6365 before starting a queue runner without re-exec. This happened only when
6366 deliver_drop_privilege was set or when the Exim user was set to root. The
6367 effect of the bug was that timeouts during subsequent deliveries caused
6368 crashes instead of being properly handled. The handler is now left at its
6369 default (and expected) setting.
6371 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6372 message, again when deliver_drop_privilege is set or Exim is run as root.
6373 The bug described in (1) was not present in this case, but the tidying up
6374 of the other signals was missing. I have made the two cases consistent.
6376 3. The ignore_target_hosts setting on a manualroute router was being ignored
6377 for hosts that were looked up using the /MX notation.
6379 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6382 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6383 operated on the sender address. After changing the $sender_address to <>
6384 for the sender address verify, Exim was re-instated it as the original
6385 (before rewriting) address, but remembering that it had rewritten it, so it
6386 wasn't rewriting it again. This bug also had the effect of breaking the
6387 sender address verification caching when the sender address was rewritten.
6389 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6390 This has been changed so that if the ip literal address matches
6391 ignore_target_hosts, the router declines.
6393 7. Added expansion conditions match_domain, match_address, and match_local_
6394 part (NOT match_host).
6396 8. The placeholder for the Received: header didn't have a length field set.
6398 9. Added code to Exim itself and to exim_lock to test for a specific race
6399 condition that could lead to file corruption when using MBX delivery. The
6400 issue is with the lockfile that is created in /tmp. If this file is removed
6401 after a process has opened it but before that process has acquired a lock,
6402 there is the potential for a second process to recreate the file and also
6403 acquire a lock. This could lead to two Exim processes writing to the file
6404 at the same time. The added code performs the same test as UW imapd; it
6405 checks after acquiring the lock that its file descriptor still refers to
6406 the same named file.
6408 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6409 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6412 11. Added the smtp_active_hostname option. If used, this will typically be made
6413 to depend on the incoming interface address. Because $interface_address is
6414 not set up until the daemon has forked a reception process, error responses
6415 that can happen earlier (such as "too many connections") no longer contain
6418 12. If an expansion in a condition on a "warn" statement fails because a lookup
6419 defers, the "warn" statement is abandoned, and the next ACL statement is
6420 processed. Previously this caused the whole ACL to be aborted.
6422 13. Added the iplsearch lookup type.
6424 14. Added ident_timeout as a log selector.
6426 15. Added tls_certificate_verified as a log selector.
6428 16. Added a global option tls_require_ciphers (compare the smtp transport
6429 option of the same name). This controls incoming TLS connections.
6431 17. I finally figured out how to make tls_require_ciphers do a similar thing
6432 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6433 before starting the TLS session.
6435 18. Tabs are now shown as \t in -bP output.
6437 19. If the log selector return_path_on_delivery was set, Exim crashed when
6438 bouncing a message because it had too many Received: header lines.
6440 20. If two routers both had headers_remove settings, and the first one included
6441 a superfluous trailing colon, the final name in the first list and the
6442 first name in the second list were incorrectly joined into one item (with a
6443 colon in the middle).
6449 1. Added -C and -D options to the exinext utility, mainly to make it easier
6450 to include in the automated testing, but these could be helpful when
6451 multiple configurations are in use.
6453 2. The exinext utility was not formatting the output nicely when there was
6454 an alternate port involved in the retry record key, nor when there was a
6455 message id as well (for retries that were specific to a specific message
6456 and a specific host). It was also confused by IPv6 addresses, because of
6457 the additional colons they contain. I have fixed the IPv4 problem, and
6458 patched it up to do a reasonable job for IPv6.
6460 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6461 delivery, the log line now contains "pipelined" if PIPELINING was used.
6463 4. An SMTP transport process used to panic and die if the bind() call to set
6464 an explicit outgoing interface failed. This has been changed; it is now
6465 treated in the same way as a connect() failure.
6467 5. A reference to $sender_host_name in the part of a conditional expansion
6468 that was being skipped was still causing a DNS lookup. This no longer
6471 6. The def: expansion condition was not recognizing references to header lines
6472 that used bh_ and bheader_.
6474 7. Added the _cache feature to named lists.
6476 8. The code for checking quota_filecount in the appendfile transport was
6477 allowing one more file than it should have been.
6479 9. For compatibility with Sendmail, the command line option
6487 and sets the incoming protocol and host name (for trusted callers). The
6488 host name and its colon can be omitted when only the protocol is to be set.
6489 Note the Exim already has two private options, -pd and -ps, that refer to
6490 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6491 "s", but I don't think that's a major issue.
6493 10. A number of refactoring changes to the code, none of which should affect
6496 (a) The number of logging options was getting close to filling up the
6497 32-bit word that was used as a bit map. I have split them into two classes:
6498 those that are passed in the argument to log_write(), and those that are
6499 only ever tested independently outside of that function. These are now in
6500 separate 32-bit words, so there is plenty of room for expansion again.
6501 There is no change in the user interface or the logging behaviour.
6503 (b) When building, for example, log lines, the code previously used a
6504 macro that called string_cat() twice, in order to add two strings. This is
6505 not really sufficiently general. Furthermore, there was one instance where
6506 it was actually wrong because one of the argument was used twice, and in
6507 one call a function was used. (As it happened, calling the function twice
6508 did not affect the overall behaviour.) The macro has been replaced by a
6509 function that can join an arbitrary number of extra strings onto a growing
6512 (c) The code for expansion conditions now uses a table and a binary chop
6513 instead of a serial search (which was left over from when there were very
6514 few conditions). Also, it now recognizes conditions like "pam" even when
6515 the relevant support is not compiled in: a suitably worded error message is
6516 given if an attempt is made to use such a condition.
6518 11. Added ${time_interval:xxxxx}.
6520 12. A bug was causing one of the ddress fields not to be passed back correctly
6521 from remote delivery subprocesses. The field in question was not being
6522 subsequently used, so this caused to problems in practice.
6524 13. Added new log selectors queue_time and deliver_time.
6526 14. Might have fixed a bug in maildirsizefile handling that threw up
6527 "unexpected character" debug warnings, and recalculated the data
6528 unnecessarily. In any case, I expanded the warning message to give more
6531 15. Added the message "Restricted characters in address" to the statements in
6532 the default ACL that block characters like @ and % in local parts.
6534 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6535 Three changes have been made:
6537 (a) There was a serious bug; a negative response to MAIL caused the whole
6538 recipient domain to be cached as invalid, thereby blocking all messages
6539 to all local parts at the same domain, from all senders. This bug has
6540 been fixed. The domain is no longer cached after a negative response to
6541 MAIL if the sender used is not empty.
6543 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6546 (c) A new callout option, "use_sender" has been added for people who want
6547 the modified behaviour.
6553 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6556 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6557 indeed breaks things for older releases.
6559 3. Added additional logging to the case where there is a problem reading data
6560 from a filter that is running in a subprocess using a pipe, in order to
6561 try to track down a specific problem.
6563 4. Testing facility fudge: when running in the test harness and attempting
6564 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6565 getting "No route to host". Convert this to a timeout.
6567 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6570 6. Some OS don't have socklen_t but use size_t instead. This affects the
6571 fifth argument of getsockopt() amongst other things. This is now
6572 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6573 can be set for individual OS. I have set it for SunOS5, OSF1, and
6574 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6575 some earlier ones do not.
6577 7. Change 4.30/15 was not doing the test caselessly.
6579 8. The standard form for an IPv6 address literal was being rejected by address
6580 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6581 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6582 this, as well as the form without the "IPv6" on the front (but only when
6583 address literals are enabled, of course).
6585 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6587 10. Exim crashed if a message with an empty sender address specified by -f
6588 encountered a router with an errors_to setting. This could be provoked only
6589 by a command such as
6593 where an empty string was supplied; "<>" did not hit this bug.
6595 11. Installed PCRE release 4.5.
6597 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6598 remained set. It is now erased.
6600 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6601 times from message ids (which are base 36 rather than the normal 62).
6603 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6604 were being counted as actual protocol errors, and logged if the log
6605 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6606 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6607 and DATA following a set of rejected RCPTs do not count as protocol errors.
6608 In other words, Exim assumes they were pipelined, though this may not
6609 actually be the case. Of course, in all cases the client gets an
6610 appropriate error code.
6612 15. If a lookup fails in an ACL condition, a message about the failure may
6613 be available; it is used if testing the ACL cannot continue, because most
6614 such messages specify what the cause of the deferral is. However, some
6615 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6616 that caused an old message to be retained and used if a later statement
6617 caused a defer, replacing the real cause of the deferral.
6619 16. If an IP address had so many PTR records that the DNS lookup buffer
6620 was not large enough to hold them, Exim could crash while trying to process
6621 the truncated data. It now detects and logs this case.
6623 17. Further to 4.21/58, another change has been made: if (and only if) the
6624 first line of a message (the first header line) ends with CRLF, a bare LF
6625 in a subsequent header line has a space inserted after it, so as not to
6626 terminate the header.
6628 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6629 unnecessarily, used atoi() instead of strtol(), and didn't check the
6630 termination when getting file sizes from file names by regex.
6632 19. Completely re-implemented the support for maildirsize files, in the light
6633 of a number of problems with the previous contributed implementation
6634 (4.30/29). In particular:
6636 . If the quota is zero, the maildirsize file is maintained, but no quota is
6639 . If the maildir directory does not exist, it is created before any attempt
6640 to write a maildirsize file.
6642 . The quota value in the file is just a cache; if the quota is changed in
6643 the transport, the new value overrides.
6645 . A regular expression is available for excluding directories from the
6648 20. The autoreply transport checks the characters in options that define the
6649 message's headers; it allows continued headers, but it was checking with
6650 isspace() after an embedded newline instead of explicitly looking for a
6653 21. If all the "regular" hosts to which an address was routed had passed their
6654 expiry times, and had not reached their retry times, the address was
6655 bounced, even if fallback hosts were defined. Now Exim should go on to try
6658 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6659 equivalent code in the SMTP transport. Some hosts send humungous responses
6660 to HELO/EHLO, more than 1024 it seems.
6662 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6663 gives compiler warnings in some environments. I've now done it "properly",
6666 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6667 (because of problems with the built-in one) was declared to return uschar *
6668 instead of char *, causing compiler failure.
6670 25. Fixed a file descriptor leak when processing alias/forward files.
6672 26. Fixed a minor format string issue in dbfn.c.
6674 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6676 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6677 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6680 29. When a sender address is verified, it is cached, to save repeating the test
6681 when there is more than one recipient in a message. However, when the
6682 verification involves a callout, it is possible for different callout
6683 options to be set for different recipients. It is too complicated to keep
6684 track of this in the cache, so now Exim always runs a verification when a
6685 callout is required, relying on the callout cache for the optimization.
6686 The overhead is duplication of the address routing, but this should not be
6689 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6690 to be verified with callout=postmaster, and the main callout worked but the
6691 postmaster check failed, the verification correctly failed. However, if a
6692 subsequent RCPT command asked for sender verification *without* the
6693 postmaster check, incorrect caching caused this verification also to fail,
6696 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6697 it was not caching the DNS options (qualify_single, search_parents) that
6698 were used when the lookup failed. A subsequent lookup with different
6699 options therefore always gave the same answer, though there were cases
6700 where it should not have. (Example: a "domains = !$mx_any" option on a
6701 dnslookup router: the "domains" option is always processed without any
6702 widening, but the router might have qualify_single set.) Now Exim uses the
6703 cached value only when the same options are set.
6705 32. Added John Jetmore's "exipick" utility to the distribution.
6707 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6708 than a timeout (e.g. a certificate is required, and is not provided), an
6709 Exim server now closes the connection immediately. Previously it waited for
6710 the client to close - but if the client is SSL, it seems that they each
6711 wait for each other, leading to a delay before one of them times out.
6713 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6714 maintained 0.8.x compatibility because I don't think many are using it, and
6715 it is clearly obsolete.
6717 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6720 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6721 client certificate was expired. A simple patch fixes this, though I don't
6722 understand the full logic of why the verify callback is called multiple
6725 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6726 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6727 which causes problems with some clients (such as the Certicom SSL Plus
6728 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6729 disables the coutermeasure allowing Eudora to connect."
6731 38. Exim was not checking that a write() to a log file succeeded. This could
6732 lead to Bad Things if a log got too big, in particular if it hit a file
6733 size limit. Exim now panics and dies if it cannot write to a log file, just
6734 as it does if it cannot open a log file.
6736 39. Modified OS/Makefile-Linux so that it now contains
6738 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6740 The two -D definitions ensure that Exim is compiled with large file
6741 support, which makes it possible to handle log files that are bigger than
6744 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6745 instance) a domain was checked against a named list that involved a lookup,
6746 causing $domain_data to be set, then another domain was checked against the
6747 same list, then the first domain was re-checked, the value of $domain_data
6748 after the final check could be wrong. In particular, if the second check
6749 failed, it could be set empty. This bug probably also applied to
6752 41. The strip_trailing_dot option was not being applied to the address given
6753 with the -f command-line option.
6755 42. The code for reading a message's header from the spool was incrementing
6756 $received_count, but never initializing it. This meant that the value was
6757 incorrect (doubled) while delivering a message in the same process in which
6758 it was received. In the most common configuration of Exim, this never
6759 happens - a fresh exec is done - but it can happen when
6760 deliver_drop_privilege is set.
6762 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6763 it now includes up to 150 characters of the unexpected data in the log
6766 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6767 and building data strings. The size of both of these buffers was 10 000
6768 bytes - far larger than anybody would *ever* want, thought I. Needless to
6769 say, somebody hit the limit. I have increased the maximum line length to
6770 20 000 and the maximum data length of concatenated lines to 100 000. I have
6771 also fixed two bugs, because there was no checking on these buffers. Tsk,
6772 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6773 buffer is too small.
6775 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6776 lsearch lookups. Now it does.
6778 46. When parsing a route_list item in a manualroute router, a fixed-length
6779 buffer was used for the list of hosts. I made this 1024 bytes long,
6780 thinking that nobody would ever have a list of hosts that long. Wrong.
6781 Somebody had a whole pile of complicated expansion conditions, and the
6782 string was silently truncated, leading to an expansion error. It turns out
6783 that it is easier to change to an unlimited length (owing to other changes
6784 that have happened since this code was originally written) than to build
6785 structure for giving a limitation error. The length of the item that
6786 expands into the list of hosts is now unlimited.
6788 47. The lsearch lookup could not handle data where the length of text line was
6789 more than 4095 characters. Such lines were truncated, leading to shortened
6790 data being returned. It should now handle lines of any length.
6792 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6793 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6796 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6797 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6798 no longer happens in comment lines. A list of replacements is now placed
6799 at the head of all of the source files, except those whose only change is
6800 to replace PERL_COMMAND in the very first #! line.
6802 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6803 messages on the queue, with a bottom-up merge sort, using code contributed
6804 by Michael Haardt. This should make operations like -bp somewhat faster on
6805 large queues. It won't affect queue runners, except when queue_run_in_order
6808 51. Installed eximstats 1.31 in the distribution.
6810 52. Added support for SRV lookups to the dnslookup router.
6812 53. If an ACL referred to $message_body or $message_body_end, the value was not
6813 reset for any messages that followed in the same SMTP session.
6815 54. The store-handling optimization for building very long strings was not
6816 differentiating between the different store pools. I don't think this
6817 actually made any difference in practice, but I've tidied it.
6819 55. While running the routers to verify a sender address, $sender_address
6820 was still set to the sender address. This is wrong, because when routing to
6821 send a bounce to the sender, it would be empty. Therefore, I have changed
6822 it so that, while verifying a sender address, $sender_address is set to <>.
6823 (There is no change to what happens when verifying a recipient address.)
6825 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6826 target A or AAAA records (if not already returned) without resetting the
6827 qualify_single or search_parents options of the DNS resolver. These are
6828 inappropriate in this case because the targets of MX and SRV records must
6829 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6830 target that, when qualified, matched something in the local domain. These
6831 two options are now turned off when doing these lookups.
6833 57. It seems that at least some releases of Reiserfs (which does not have the
6834 concept of a fixed number of inodes) returns zero and not -1 for the
6835 number of available inodes. This interacted badly with check_spool_inodes,
6836 which assumed that -1 was the "no such thing" setting. What I have done is
6837 to check that the total number of inodes is greater than zero before doing
6838 the test of how many are available.
6840 58. When a "warn" ACL statement has a log_message modifier, the message is
6841 remembered, and not repeated. This is to avoid a lot of repetition when a
6842 message has many recipients that cause the same warning to be written.
6843 However, Exim was preserving the list of already written lines for an
6844 entire SMTP session, which doesn't seem right. The memory is now reset if a
6845 new message is started.
6847 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6848 debugging output unless log_rewrite was also set.
6850 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6851 of (int)(handle) when we know that handle contains (void *)(-1).
6853 61. The Exim daemon panic-logs an error return when it closes the incoming
6854 connection. However "connection reset by peer" seems to be common, and
6855 isn't really an error worthy of noting specially, so that particular error
6858 62. When Exim is trying to find all the local interfaces, it used to panic and
6859 die if the ioctl to get the interface flags failed. However, it seems that
6860 on at least one OS (Solaris 9) it is possible to have an interface that is
6861 included in the list of interfaces, but for which you get a failure error
6862 for this call. This happens when the interface is not "plumbed" into a
6863 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6864 failure of the "get flags" call assumes that the interface is down.
6866 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6867 makes life easier for people who are doing arithmetic on fields extracted
6868 from dates, where you often get leading zeros that should not be
6869 interpreted as octal.
6871 64. Added qualify_domain to the redirect router, to override the global
6874 65. If a pathologically long header line contained very many addresses (the
6875 report of this problem mentioned 10 000) and each of them was rewritten,
6876 Exim could use up a very large amount of memory. (It kept on making new
6877 copies of the header line as it rewrote, and never released the old ones.)
6878 At the expense of a bit more processing, the header rewriting function has
6879 been changed so that it no longer eats memory in this way.
6881 66. The generation of the Received: header has been moved from the time that a
6882 message starts to be received, to the time that it finishes. The timestamp
6883 in the Received: header should now be very close to that of the <= log
6884 line. There are two side-effects of this change:
6886 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6887 logged header lines no longer include the local Received: line, because
6888 it has not yet been created. The same applies to a copy of the message
6889 that is returned to a non-SMTP sender when a message is rejected.
6891 (b) When a filter file is tested using -bf, no additional Received: header
6892 is added to the test message. After some thought, I decided that this
6895 This change does not affect the value of $received_for. It is still set
6896 after address rewriting, but before local_scan() is called.
6898 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6900 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6901 gave an unhelpful panic error message, and a defer error. I have managed to
6902 change this behaviour so that it now rejects any supplied certificate,
6903 which seems right, as the list of acceptable certificates is empty.
6905 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6906 gave an unhelpful defer error. I have not managed to make this reject any
6907 supplied certificates, but the error message it gives is "no certificate
6908 supplied", which is not helpful.
6910 70. exigrep's output now also includes lines that are not associated with any
6911 message, but which match the given pattern. Implemented by a patch from
6912 Martin Sluka, which also tidied up the Perl a bit.
6914 71. Recipient callout verification, like sender verification, was using <> in
6915 the MAIL FROM command. This isn't really the right thing, since the actual
6916 sender may affect whether the remote host accepts the recipient or not. I
6917 have changed it to use the actual sender in the callout; this means that
6918 the cache record is now keyed on a recipient/sender pair, not just the
6919 recipient address. There doesn't seem to be a real danger of callout loops,
6920 since a callout by the remote host to check the sender would use <>.
6921 [SEE ABOVE: changed after hitting problems.]
6923 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6924 temporary errors. However, in the case of such a code being given after
6925 the end of a data transmission (i.e. after ".") Exim was failing to write
6926 a retry record for the message. (Yes, there was some broken host that was
6927 actually sending 8xx at this point.)
6929 73. An unknown lookup type in a host list could cause Exim to panic-die when
6930 the list was checked. (An example that provoked this was putting <; in the
6931 middle of a list instead of at the start.) If this happened during a DATA
6932 ACL check, a -D file could be left lying around. This kind of configuration
6933 error no longer causes Exim to die; instead it causes a defer error. The
6934 incident is still logged to the main and panic logs.
6936 74. Buglet left over from Exim 3 conversion. The message "too many messages
6937 in one connection" was written to the rejectlog but not the mainlog, except
6938 when address rewriting (yes!) was being logged.
6940 75. Added write_rejectlog option.
6942 76. When a system filter was run not as root (that is, when system_filter_user
6943 was set), the values of the $n variables were not being returned to the
6944 main process; thus, they were not subsequently available in the $sn
6947 77. Added +return_path_on_delivery log selector.
6949 78. A connection timeout was being treated differently from recipients deferred
6950 when testing hosts_max_try with a message that was older than the host's
6951 retry timeout. (The host should not be counted, thus allowing all hosts to
6952 be tried at least once before bouncing.) This may have been the cause of an
6953 occasionally reported bug whereby a message would remain on the queue
6954 longer than the retry timeout, but would be bounced if a delivery was
6955 forced. I say "may" because I never totally pinned down the problem;
6956 setting up timeout/retry tests is difficult. See also the next item.
6958 79. The ultimate address timeout was not being applied to errors that involved
6959 a combination of host plus message (for example, a timeout on a MAIL
6960 command). When an address resolved to a number of possible hosts, and they
6961 were not all tried for each delivery (e.g. because of hosts_max_try), a
6962 message could remain on the queue longer than the retry timeout.
6964 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6967 81. Fixed an obscure SMTP outgoing bug which required at least the following
6968 conditions: (a) there was another message waiting for the same server;
6969 (b) the server returned 5xx to all RCPT commands in the first message so
6970 that the message was not completed; (c) the server dropped the connection
6971 or gave a negative response to the RSET that Exim sends to abort the
6972 transaction. The observed case was a dropped connection after DATA that had
6973 been sent in pipelining mode. That is, the server had advertised PIPELINING
6974 but was not implementing it correctly. The effect of the bug was incorrect
6975 behaviour, such as trying another host, and this could lead to a crash.
6981 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6982 and daemon.c were passed as pointers to ints; they should have been
6983 pointers to socklen_t variables (which are typically unsigned ints).
6985 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6988 3. Fixed a really odd bug that affected only the testing scheme; patching a
6989 certain fixed string in the binary changed the value of another string that
6990 happened to be identical to the end of the original first string.
6992 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6993 name", it returns that address as the IP address. On some operating
6994 systems (e.g. Solaris), it also passes back the IP address string as the
6995 "host name". However, on others (e.g. Linux), it passes back an empty
6996 string. Exim wasn't checking for this, and was changing the host name to an
6997 empty string, assuming it had been canonicalized.
6999 5. Although rare, it is permitted to have more than one PTR record for a given
7000 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7001 all the names associated with an address, because they do in Solaris.
7002 However, it seems that they do not in Linux for data that comes from the
7003 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7004 I found this out when I moved to a new Linux workstation and tried to run
7005 the Exim test suite.
7007 To get round this problem I have changed the code so that it now does its
7008 own call to the DNS to look up PTR records when searching for a host name.
7009 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7010 addresses that are only in /etc/hosts are still found.
7012 This behaviour is, however, controlled by an option called host_lookup_
7013 order, which defaults to "bydns:byaddr". If people want to use the other
7014 order, or indeed, just use one or the other means of lookup, they can
7015 specify it in this variable.
7017 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7018 some operating systems, this comes back from gethostbyaddr() as an empty
7019 string, and this is what Exim used to test for. However, it seems that in
7020 other systems, "." is yielded. Exim now tests for this case too.
7022 7. The values of check_spool_space and check_log_space are now held internally
7023 as a number of kilobytes instead of an absolute number of bytes. If a
7024 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7025 kilobyte. This means that much larger values can be stored.
7027 8. Exim monitor: an attempt to get the action menu when not actually pointing
7028 at a message produces an empty menu entitled "No message selected". This
7029 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7030 no entries in it ("Shell widget menu has zero width and/or height"). So I
7031 have added a single, blank menu entry in this case.
7033 9. Added ${quote_local_part.
7035 10. MIME decoding is now applied to the contents of Subject: header lines when
7038 11. Now that a reference to $sender_host_address automatically causes a reverse
7039 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7040 host lookup before query-style lookups in lists that might use this
7041 variable. This has therefore been abolished, and the "net-" prefix is no
7042 longer necessary for query-style lookups.
7044 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7045 have been a typo for LFLAGS, so it has been changed.
7047 13. The install script calls Exim with "-C /dev/null" in order to find the
7048 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7049 to be output. However, since Exim outputs its version number before the
7050 error, it didn't break the script. It just looked ugly. I fixed this by
7051 always allowing "-C /dev/null" if the caller is root.
7053 14. Ignore overlarge ACL variable number when reading spool file - insurance
7054 against a later release with more variables having written the file.
7056 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7057 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7058 this, as well as the form without the "IPv6" on the front.
7060 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7061 OS/Makefile-Darwin file.
7063 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7064 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7066 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7067 variable. However, some OS use ints for inodes. I've added cast to long int
7068 to get rid of the compiler warning.
7070 19. I had forgotten to lock out "/../" in configuration file names when
7071 ALT_CONFIG_PREFIX was set.
7073 20. Routers used for verification do not need to specify transports. However,
7074 if such a router generated a host list, and callout was configured, Exim
7075 crashed, because it could not find a port number from the (non-existent)
7076 transport. It now assumes port 25 in this circumstance.
7078 21. Added the -t option to exigrep.
7080 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7081 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7082 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7083 them is set, LOOKUP_LSEARCH is forced.
7085 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7087 24. Added sender and host information to the "rejected by local_scan()" log
7088 line; previously there was no indication of these.
7090 25. Added .include_if_exists.
7092 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7093 Linux. It turns out that not all file systems support this. Apparently some
7094 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7095 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7096 not supported on the file descriptor, is now ignored when Exim is trying to
7097 sync a directory. This applies only to Linux.
7099 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7101 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7102 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7105 29. Added support for maildirsize files from supplied patch (modified a bit).
7107 30. The use of :fail: followed by an empty string could lead Exim to respond to
7108 sender verification failures with (e.g.):
7110 550 Verification failed for <xxx>
7111 550 Sender verify failed
7113 where the first response line was missing the '-' that indicates it is not
7114 the final line of the response.
7116 31. The loop for finding the name of the user that called Exim had a hardwired
7117 limit of 10; it now uses the value of finduser_retries, which is used for
7118 all other user lookups.
7120 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7123 33. Exim was neglecting to zero errno before one call of strtol() when
7124 expanding a string and expecting an integer value. On some systems this
7125 resulted in spurious "integer overflow" errors. Also, it was casting the
7126 result into an int without checking.
7128 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7129 did not work. The code looks as if it has *never* worked, though it appears
7130 to have been documented since at least release 1.62. I have made it work.
7132 35. The "timeout_DNS" error in retry rules, also documented since at least
7133 1.62, also never worked. As it isn't clear exactly what this means, and
7134 clearly it isn't a major issue, I have abolished the feature by treating it
7135 as "timeout", and writing a warning to the main and panic logs.
7137 36. The display of retry rules for -brt wasn't always showing the error code
7140 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7141 timeout_connect_A, timeout_connect_MX.
7143 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7144 to the empty sender.
7146 39. The daemon was not analysing the content of -oX till after it had closed
7147 stderr and disconnected from the controlling terminal. This meant that any
7148 syntax errors were only noted on the panic log, and the return code from
7149 the command was 0. By re-arranging the code a little, I've made the
7150 decoding happen first, so such errors now appear on stderr, and the return
7151 code is 1. However, the actual setting up of the sockets still happens in
7152 the disconnected process, so errors there are still only recorded on the
7155 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7156 connections (as happens on some IP stacks) was logged at start up time as
7157 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7158 it from "IPv6 and IPv4", which means that two separate sockets are being
7161 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7162 says whether AF_INET or AF_INET6 was passed as an argument.
7164 42. Exiwhat output was messed up when time zones were included in log
7167 43. Exiwhat now gives more information about the daemon's listening ports,
7168 and whether -tls-on-connect was used.
7170 44. The "port" option of the smtp transport is now expanded.
7172 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7173 silently ignored. Now an error message is written to the main and panic
7176 46. There's a new ACL modifier called "logwrite" which writes to a log file
7177 as soon as it is encountered.
7179 47. Added $local_user_uid and $local_user_gid at routing time.
7181 48. Exim crashed when trying to verify a sender address that was being
7184 49. Exim was recognizing only a space character after ".include". It now also
7185 recognizes a tab character.
7187 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7188 extracting the relevant information from the specification. The man page no
7189 longer contains scrambled data for the -d option, and I've added a section
7190 at the front about calling Exim under different names.
7192 51. Added "extra_headers" argument to the "mail" command in filter files.
7194 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7197 53. Installed eximstats 1.29.
7199 54. Added transport_filter_timeout as a generic transport option.
7201 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7202 Cc: header lines. This was required by RFC 822, but it not required by RFC
7205 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7206 incoming messages that did not have them. Now it does so only if the
7207 message originates locally, that is, if there is no associated remote host
7208 address. When Resent- header lines are present, this applies to the Resent-
7209 lines rather than the non-Resent- lines.
7211 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7212 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7214 58. Messages for configuration errors now include the name of the main
7215 configuration file - useful now that there may be more than one file in a
7216 list (.included file names were always shown).
7218 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7219 for those rare installations that do not start the daemon as root or run it
7220 setuid root. I've cut out the call to initgroups() if the daemon is not
7223 60. The Exim user and group can now be bound into the binary as text strings
7224 that are looked up at the start of Exim's processing.
7226 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7228 62. Added $mailstore_basename variable.
7230 63. Installed patch to sieve.c from Michael Haardt.
7232 64. When Exim failed to open the panic log after failing to open the main log,
7233 the original message it was trying to log was written to stderr and debug
7234 output, but if they were not available (the usual case in production), it
7235 was lost. Now it is written to syslog before the two lines that record the
7236 failures to open the logs.
7238 65. Users' Exim filters run in subprocesses under the user's uid. It is
7239 possible for a "deliver" command or an alias in a "personal" command to
7240 provoke an address rewrite. If logging of address rewriting is configured,
7241 this fails because the process is not running as root or exim. There may be
7242 a better way of dealing with this, but for the moment (because 4.30 needs
7243 to be released), I have disabled address rewrite logging when running a
7244 filter in a non-root, non-exim process.
7250 1. The buildconfig auxiliary program wasn't quoting the value set for
7251 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7252 not defined. This bug was masked in 4.22 by the effect that was fixed in
7255 2. Some messages that were rejected after a message id was allocated were
7256 shown as "incomplete" by exigrep. It no longer does this for messages that
7257 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7259 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7260 have allow_domain_literals set, the ID did not get logged in the <= line.
7261 Domain literals are now always recognized in Message-ID: header lines.
7263 4. The first argument for a ${extract expansion item is the key name or field
7264 number. Leading and trailing spaces in this item were not being ignored,
7265 causing some misleading effects.
7267 5. When deliver_drop_privilege was set, single queue runner processes started
7268 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7269 same command in the process it spins off) were not dropping privilege.
7271 6. When the daemon running as "exim" started a queue runner, it always
7272 re-executed Exim in the spun-off process. This is a waste of effort when
7273 deliver_drop_privilege is set. The new process now just calls the
7274 queue-runner function directly.
7280 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7283 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7284 ignored. Though the use of -oP was forcing the writing of a pid file, it
7285 was always written to the default place.
7287 3. If the message "no IP address found for host xxxx" is generated during
7288 incoming verification, it is now followed by identification of the incoming
7289 connection (so you can more easily find what provoked it).
7291 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7293 5. Added some features to "harden" Exim a bit more against certain attacks:
7295 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7296 be put in Local/Makefile. This is like the never_users runtime option,
7297 but it cannot be overridden. The default setting is "root".
7299 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7300 prefix string with which any file named in a -C command line option
7303 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7304 is retained for -C and -D only if the caller of Exim is root. Without
7305 it, the exim user may also use -C and -D and retain privilege.
7307 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7308 command line option is disabled.
7310 6. Macro names set by the -D option must start with an upper case letter, just
7311 like macro names defined in the configuration file.
7313 7. Added "dereference=" facility to LDAP.
7315 8. Two instances of the typo "uknown" in the source files are fixed.
7317 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7318 the Configure-Makefile script screwed up while processing it.
7320 10. Incorporated PCRE 4.4.
7322 11. The SMTP synchronization check was not operating right at the start of an
7323 SMTP session. For example, it could not catch a HELO sent before the client
7324 waited for the greeting. There is now a check for outstanding input at the
7325 point when the greeting is written. Because of the duplex, asynchronous
7326 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7327 way, but not yet received, when the check is performed.
7329 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7330 on TCP/IP sockets, because this apparently causes some broken clients to
7333 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7334 unchanged) from the Cygwin maintainer.
7336 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7337 was supported instead of testing for mbx. Effectively a typo.
7339 15. The spa authenticator server code was not checking that the input it
7340 received was valid base64.
7342 16. The debug output line for the "set" modifier in ACLs was not showing the
7343 name of the variable that was being set.
7345 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7347 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7348 lookup on its own. Something else was needed to trigger the lookup. For
7349 example, a match in host_lookup or the need for a host name in a host list.
7350 Now, if $sender_host_name is referenced and the host name has not yet been
7351 looked up, a lookup is performed. If the lookup fails, the variable remains
7352 empty, and $host_lookup_failed is set to "1".
7354 19. Added "eqi" as a case-independent comparison operator.
7356 20. The saslauthd authentication condition could segfault if neither service
7357 nor realm was specified.
7359 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7360 error message that was logged was misleading, and incoming SMTP
7361 connections were dropped. The message is now more accurate, and temporary
7362 errors are given to SMTP connections.
7364 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7365 (except RSET) with a 421 error, until QUIT is received. However, it was
7366 failing to send a response to QUIT.
7368 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7369 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7370 ACL is now run after the helo_try_verify_hosts code.
7372 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7373 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7374 case-independent, so other case variants are also recognized). Apparently
7375 some systems use these upper case variants.
7377 25. If more than two messages were waiting for the same host, and a transport
7378 filter was specified for the transport, Exim sent two messages over the
7379 same TCP/IP connection, and then failed with "socket operation on non-
7380 socket" when it tried to send the third.
7382 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7384 27. The extern definition of crypt16() in expand.c was not being excluded when
7385 the OS had its own crypt16() function.
7387 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7388 as a preferred synonym for return_size_limit, both as an option and as an
7391 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7393 30. Changed the default configuration ACL to relax the local part checking rule
7394 for addresses that are not in any local domains. For these addresses,
7395 slashes and pipe symbols are allowed within local parts, but the sequence
7396 /../ is explicitly forbidden.
7398 31. SPA server authentication was not clearing the challenge buffer before
7401 32. log_message in a "warn" ACL statement was writing to the reject log as
7402 well as to the main log, which contradicts the documentation and doesn't
7403 seem right (because no rejection is happening). So I have stopped it.
7405 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7406 However, I am unable to do any testing of this.
7408 34. Fixed an infelicity in the appendfile transport. When checking directories
7409 for a mailbox, to see if any needed to be created, it was accidentally
7410 using path names with one or more superfluous leading slashes; tracing
7411 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7413 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7414 contents are added to the log line that is written for every discarded
7415 recipient. (Previously a log_message setting was ignored.)
7417 36. The ${quote: operator now quotes the string if it is empty.
7419 37. The install script runs exim in order to find its version number. If for
7420 some reason other than non-existence or emptiness, which it checks, it
7421 could not run './exim', it was installing it with an empty version number,
7422 i.e. as "exim-". This error state is now caught, and the installation is
7425 38. An argument was missing from the function that creates an error message
7426 when Exim fails to connect to the socket for saslauthd authentication.
7427 This could cause Exim to crash, or give a corrupted message.
7429 39. Added isip, isip4, and isip6 to ${if conditions.
7431 40. The ACL variables $acl_xx are now saved with the message, and can be
7432 accessed later in routers, transports, and filters.
7434 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7435 strings in the file are not string-expanded.
7437 42. If a MAIL command specified a SIZE value that was too large to fit into an
7438 int variable, the check against message_size_limit failed. Such values are
7439 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7440 day this will have to be increased, but I don't think I want to be around
7441 when emails are that large.
7448 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7449 iconv() is not standard in FreeBSD.
7451 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7452 IPv6 enabled. The observed symptom was a segmentation fault on return from
7453 the function os_common_find_running_interfaces() in src/os.c.
7455 3. In the check_special_case() function in daemon.c I had used "errno" as an
7456 argument name, which causes warnings on some systems. This was basically a
7457 typo, since it was named "eno" in the comments!
7459 4. The code that waits for the clock to tick (at a resolution of some fraction
7460 of a second) so as to ensure message-id uniqueness was always waiting for
7461 at least one whole tick, when it could have waited for less. [This is
7462 almost certainly not relevant at current processor speeds, where it is
7463 unlikely to ever wait at all. But we try to future-proof.]
7465 5. The function that sleeps for a time interval that includes fractions of a
7466 second contained a race. It did not block SIGALRM between setting the
7467 timer, and suspending (a couple of lines later). If the interval was short
7468 and the sigsuspend() was delayed until after it had expired, the suspension
7469 never ended. On busy systems this could lead to processes getting stuck for
7472 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7473 process, before it forks any delivery processes. The open lookup caching
7474 mechanism meant that the open file or database connection was passed into
7475 the delivery process. The problem was that delivery processes always tidy
7476 up cached lookup data. This could cause a problem for the next delivery
7477 process started by the queue runner, because the external queue runner
7478 process does not know about the closure. So the next delivery process
7479 still has data in the lookup cache. In the case of a file lookup, there was
7480 no problem because closing a file descriptor in a subprocess doesn't affect
7481 the parent. However, if the lookup was caching a connection to a database,
7482 the connection was closed, and the second delivery process was likely to
7483 see errors such as "PGSQL: query failed: server closed the connection
7484 unexpectedly". The problem has been fixed by closing all cached lookups
7485 in a queue runner before running a delivery process.
7487 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7488 seem to have the "const" qualifier which it has on other OS. I've
7491 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7492 *of the same type* (client or server) with the same public name that an
7493 error should be diagnosed.
7495 9. When Exim looked up a host name for an IP address, but failed to find the
7496 original IP address when looking up the host name (a safety check), it
7497 output the message "<ip address> does not match any IP for NULL", which was
7498 confusing, to say the least. The bug was that the host name should have
7499 appeared instead of "NULL".
7501 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7502 user that is built into the binary, and the -C or -D options is used, root
7503 privilege is dropped before the configuration file is read. In addition,
7504 logging is switched to stderr instead of the normal log files. If the
7505 configuration then re-defines the Exim user, the unprivileged environment
7506 is probably not what is expected, so Exim logs a panic warning message (but
7509 However, if deliver_drop_privilege is set, the unprivileged state may well
7510 be exactly what is intended, so the warning has been cut out in that case,
7511 and Exim is allowed to try to write to its normal log files.
7517 1. smtp_return_error_details was not giving details for temporary sender
7518 or receiver verification errors.
7520 2. Diagnose a configuration error if two authenticators have the same public
7523 3. Exim used not to create the message log file for a message until the first
7524 delivery attempt. This could be confusing when incoming messages were held
7525 for policy or load reasons. The message log file is now created at the time
7526 the message is received, and an initial "Received" line is written to it.
7528 4. The automatically generated man page for command line options had a minor
7529 bug that caused no ill effects; however, a more serious problem was that
7530 the procedure for building the man page automatically didn't always
7531 operate. Consequently, release 4.20 contains an out-of-date version. This
7532 shouldn't happen again.
7534 5. When building Exim with embedded Perl support, the script that builds the
7535 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7536 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7538 6. The freeze_tell option was not being used for messages that were frozen on
7539 arrival, either by an ACL or by local_scan().
7541 7. Added the smtp_incomplete_transaction log selector.
7543 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7544 was accepting AUTH without a new EHLO.
7546 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7547 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7550 10. Logging of TCP/IP connections (when configured) now happens in the main
7551 daemon process instead of the child process, so that the TCP/IP connection
7552 count is more accurate (but it can never be perfect).
7554 11. The use of "drop" in a nested ACL was not being handled correctly in the
7555 outer ACL. Now, if condition failure induced by the nested "drop" causes
7556 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7557 or "require"), the connection is dropped.
7559 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7560 that yield "discard" can now be used with an "accept" or a "discard" verb,
7561 but an error is generated for any others (because I can't see a useful way
7562 to define what should happen).
7564 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7565 are now processed in the same way as lines in the Exim configuration file.
7566 In particular, continuation lines are supported.
7568 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7570 15. Added -ti meaning -t -i.
7572 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7573 domains, and warn by logging if others are found.
7575 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7576 returned from GIFCONF when Exim is trying to find the list of interfaces on
7577 a host. The code in os.c has been modified to copy each ifreq to an aligned
7578 structure in all cases.
7580 Also, in some cases, the returned ifreq's were being copied to a 'struct
7581 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7582 means the last couple of bytes of an IPv6 address could be chopped if the
7583 ifreq contained only a normal sockaddr (14 bytes storage).
7585 18. Named domain lists were not supported in the hosts_treat_as_local option.
7586 An entry such as +xxxx was not recognized, and was treated as a literal
7589 19. Ensure that header lines added by a DATA ACL are included in the reject log
7590 if the ACL subsequently rejects the message.
7592 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7593 MD5 (which is deprecated).
7595 21. When testing a filter file using -bf, Exim was writing a message when it
7596 took the sender from a "From " line in the message, but it was not doing so
7597 when it took $return_path from a Return-Path: header line. It now does.
7599 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7600 with a valid header line field name (a series of printing characters
7601 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7603 23. Changed "disc" in the source to "disk" to conform to the documentation and
7604 the book and for uniformity.
7606 24. Ignore Sendmail's -Ooption=value command line item.
7608 25. When execve() failed while trying to run a command in a pipe transport,
7609 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7610 could be confused with a return value of 69 from the command itself. This
7611 has been changed to 127, the value the shell returns if it is asked to run
7612 a non-existent command. The wording for the related log line suggests a
7613 non-existent command as the problem.
7615 26. If received_header_text expands to an empty string, do not add a Received:
7616 header line to the message. (Well, it adds a token one on the spool, but
7617 marks it "old" so that it doesn't get used or transmitted.)
7619 27. Installed eximstats 1.28 (addition of -nt option).
7621 28. There was no check for failure on the call to getsockname() in the daemon
7622 code. This can fail if there is a shortage of resources on the system, with
7623 ENOMEM, for example. A temporary error is now given on failure.
7625 29. Contrary to the C standard, it seems that in some environments, the
7626 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7627 program. Exim now does this explicitly; it affects the formatting of
7628 timestamps using strftime().
7630 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7631 complaints. I've now initialized all the variables, to avoid this.
7633 32. Header lines added by a system filter were not being "seen" during
7634 transport-time rewrites.
7636 33. The info_callback() function passed to OpenSSL is set up with type void
7637 (*)(SSL *, int, int), as described somewhere. However, when calling the
7638 function (actually a macro) that sets it up, the type void(*)() is
7639 expected. I've put in a cast to prevent warnings from picky compilers.
7641 34. If a DNS black list lookup found a CNAME record, but there were no A
7642 records associated with the domain it pointed at, Exim crashed.
7644 35. If a DNS black list lookup returned more than one A record, Exim ignored
7645 all but the first. It now scans all returned addresses if a particular IP
7646 value is being sought. In this situation, the contents of the
7647 $dnslist_value variable are a list of all the addresses, separated by a
7650 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7651 to accept a host name and all its aliases if the forward lookup for any of
7652 them yielded the IP address of the incoming connection. Now it accepts only
7653 those names whose forward lookup yields the correct IP address. Any other
7654 names are discarded. This closes a loophole whereby a rogue DNS
7655 administrator could create reverse DNS records to break through a
7656 wildcarded host restriction in an ACL.
7658 37. If a user filter or a system filter that ran in a subprocess used any of
7659 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7660 the wrong values were passed to the pipe command ($thisaddress had the
7661 value of $0, $0 had the value of $1, etc). This bug was introduced by
7662 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7664 38. Improved the line breaking for long SMTP error messages from ACLs.
7665 Previously, if there was no break point between 40 and 75 characters, Exim
7666 left the rest of the message alone. Two changes have been made: (a) I've
7667 reduced the minimum length to 35 characters; (b) if it can't find a break
7668 point between 35 and 75 characters, it looks ahead and uses the first one
7669 that it finds. This may give the occasional overlong line, but at least the
7670 remaining text gets split now.
7672 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7673 file descriptors might be low, and that setting 1000 would always raise it.
7674 It turns out that in some environments, the limit is already over 1000 and
7675 that lowering it causes trouble. So now Exim takes care not to decrease it.
7677 40. When delivering a message, the value of $return_path is set to $sender_
7678 address at the start of routing (routers may change the value). By an
7679 oversight, this default was not being set up when an address was tested by
7680 -bt or -bv, which affected the outcome if any router or filter referred to
7683 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7684 log only when "message" or "log_message" are set. However, if one of the
7685 conditions was an address verification, or a call to a nested ACL, the
7686 messages generated by the underlying test were being passed through. This
7687 no longer happens. The underlying message is available in $acl_verify_
7688 message for both "message" and "log_message" expansions, so it can be
7689 passed through if needed.
7691 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7692 new expansion $bh_ to give the encoded byte string without charset
7693 translation. Translation happens only if iconv() is available; HAVE_ICONV
7694 indicates this at build time. HEADERS_CHARSET gives the charset to
7695 translate to; headers_charset can change it in the configuration, and
7696 "headers charset" can change it in an individual filter file.
7698 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7699 that creates RFC 2047 encoded "words" labels them as that charset instead
7700 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7701 expansion operator; (ii) when Exim creates a From: line for a local
7702 message; (iii) when a header line is rewritten to include a "phrase" part.
7704 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7705 buggy, causing it to skip the first lines of messages whose message ID
7706 ended in 'D'. This would not have bitten before Exim release 4.14, because
7707 message IDs were unlikely to end in 'D' before then. The effect was to have
7708 incorrect size information for certain domains.
7710 45. #include "config.h" was missing at the start of the crypt16.c module. This
7711 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7714 46. If there was a timeout during a "random" callout check, Exim treated it as
7715 a failure of the random address, and carried on sending RSET and the real
7716 address. If the delay was just some slowness somewhere, the response to the
7717 original RCPT would be taken as a response to RSET and so on, causing
7718 mayhem of various kinds.
7720 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7721 when I implemented it. It didn't allow for the fact that some option values
7722 may legitimately be negative (e.g. size_addition), and it didn't even do
7723 the right test for positive values.
7725 48. Domain names in DNS records are case-independent. Exim always looks them up
7726 in lower case. Some resolvers return domain names in exactly the case they
7727 appear in the zone file, that is, they may contain uppercase letters. Not
7728 all resolvers do this - some return always lower case. Exim was treating a
7729 change of case by a resolver as a change of domain, similar to a widening
7730 of a domain abbreviation. This triggered its re-routing code and so it was
7731 trying to route what was effectively the same domain again. This normally
7732 caused routing to fail (because the router wouldn't handle the domain
7733 twice). Now Exim checks for this case specially, and just changes the
7734 casing of the domain that it ultimately uses when it transmits the message
7737 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7740 50. If a filter generated a file delivery with a non-absolute name (possible if
7741 no home directory exists for the router), the forbid_file option was not
7744 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7745 the existing equality matching.
7747 52. Exim was using ints instead of ino_t variables in some places where it was
7748 dealing with inode numbers.
7750 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7751 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7752 called TMPDIR, and if it finds it is different, it changes its value.
7754 54. The smtp_printf() function is now made available to local_scan() so
7755 additional output lines can be written before returning. There is also an
7756 smtp_fflush() function to enable the detection of a dropped connection.
7757 The variables smtp_input and smtp_batched_input are exported to
7760 55. Changed the default runtime configuration: the message "Unknown user"
7761 has been removed from the ACL, and instead placed on the localuser router,
7762 using the cannot_route_message feature. This means that any verification
7763 failures that generate their own messages won't get overridden. Similarly,
7764 the "Unrouteable address" message that was in the ACL for unverifiable
7765 relay addresses has also been removed.
7767 56. Added hosts_avoid_esmtp to the smtp transport.
7769 57. The exicyclog script was not checking for the esoteric option
7770 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7771 will work only if exicyclog is run under the appropriate euid.
7773 58. Following a discussion on the list, the rules by which Exim recognises line
7774 endings on incoming messages have been changed. The -dropcr and drop_cr
7775 options are now no-ops, retained only for backwards compatibility. The
7776 following line terminators are recognized: LF CRLF CR. However, special
7777 processing applies to CR:
7779 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7780 nor a local message in the state where . is a terminator.
7782 (ii) If a bare CR is encountered in a header line, an extra space is added
7783 after the line terminator so as not to end the header. The reasoning
7784 behind this is that bare CRs in header lines are most likely either
7785 to be mistakes, or people trying to play silly games.
7787 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7788 was being incorrectly given as 18 bytes larger than it should have been.
7789 This is a VOB (very old bug).
7791 60. This may never have affected anything current, but just in case it has:
7792 When the local host is found other than at the start of a list of hosts,
7793 the local host, those with the same MX, and any that follow, are discarded.
7794 When the list in question was part of a longer list of hosts, the following
7795 hosts (not currently being processed) were also being discarded. This no
7796 longer happens. I'm not sure if this situation could ever has previously
7799 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7802 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7803 header. This is something that is recommended in a new Internet Draft, and
7804 is something that is documented as being done by Sendmail. There are two
7805 possible values. For messages generated by the autoreply transport, Exim
7808 Auto-Submitted: auto-replied
7810 whereas for all other generated messages (e.g. bounces) it adds
7812 Auto-Submitted: auto-generated
7814 63. The "personal" condition in filters now includes a test for the
7815 Auto-Submitted: header. If it contains the string "auto-" the message it
7816 not considered personal.
7818 64. Added rcpt_include_affixes as a generic transport option.
7820 65. Added queue_only_override (default true).
7822 66. Added the syslog_duplication option.
7824 67. If what should have been the first header line of a message consisted of
7825 a space followed by a colon, Exim was mis-interpreting it as a header line.
7826 It isn't of course - it is syntactically invalid and should therefore be
7827 treated as the start of the message body. The misbehaviour could have
7828 caused a number of strange effects, including loss of data in subsequent
7829 header lines, and spool format errors.
7831 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7832 client host had authenticated. This control can now be exercised by an ACL
7833 for more flexibility.
7835 69. By default, callouts do not happen when testing with -bh. There is now a
7836 variant, -bhc, which does actually run the callout code, including
7837 consulting and updating the callout cache.
7839 70. Added support for saslauthd authentication, courtesy of Alexander
7842 71. If statvfs() failed on the spool or log directories while checking their
7843 size for availability, Exim confusingly gave the error "space shortage".
7844 Furthermore, in debugging mode it crashed with a floating point exception.
7845 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7846 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7847 serious problem, Exim now writes to the main and panic logs when this
7848 happens, with details of the failure. It then refuses to accept the
7849 incoming message, giving the message "spool directory problem" or "log
7850 directory problem" with a 421 code for SMTP messages.
7852 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7853 0, 1, and 2 exist, because some OS complain for execs without them (see
7854 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7855 descriptors. However, the code omitted to check that the open succeeded,
7856 causing mysterious errors if for some reason the permissions on /dev/null
7857 got screwed. Now Exim writes a message to the main and panic logs, and
7858 bombs out if it can't open /dev/null.
7860 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7861 interact so that it is all more flexible. It is supposed to remain
7862 backwards compatible. Also added extra_local_interfaces.
7864 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7865 to bomb out with an assertion failure - to the client this appears as a
7866 connection drop. This problem occurs in the part of the code that was taken
7867 from the Samba project. Fortunately, the assertion is in a very simple
7868 function, so I have fixed this by reproducing the function inline in the
7869 one place where it is called, and arranging for authentication to fail
7870 instead of killing the process with assert().
7872 75. The SPA client code was not working when the server requested OEM rather
7873 than Unicode encoding.
7875 76. Added code to make require_files with a specific uid setting more usable in
7876 the case where statting the file as root fails - usually a non-root-mounted
7877 NFS file system. When this happens and the failure is EACCES, Exim now
7878 forks a subprocess and does the per-uid checking as the relevant uid.
7880 77. Added process_log_path.
7882 78. If log_file_path was not explicitly set, a setting of check_log_space or
7883 check_log_inodes was ignored.
7885 79. If a space check for the spool or log partitions fails, the incident is now
7886 logged. Of course, in the latter case the data may get lost...
7888 80. Added the %p formatting code to string_format() so that it can be used to
7889 print addresses in debug_print(). Adjusted all the address printing in the
7890 debugging in store.c to use %p rather than %d.
7892 81. There was a concern that a line of code in smtp_in.c could overflow a
7893 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7894 initially expressed, the concern was not well-founded, because trailing
7895 spaces are removed early. However, if the trailing spaces were followed by
7896 a NULL, they did not get removed, so the overflow was possible. Two fixes
7899 (a) I re-wrote the offending code in a cleaner fashion.
7900 (b) If an incoming SMTP command contains a NULL character, it is rejected
7903 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7904 runs initgroups(), so that if the Exim user is in any additional groups,
7905 they will be used during message reception.
7911 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob