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 Fix "spam" ACL condition. Previously, tainted values for the "name"
73 argument resulted in a trap. There is no reason to disallow such; this
80 JH/01 Avoid costly startup code when not strictly needed. This reduces time
81 for some exim process initialisations. It does mean that the logging
82 of TLS configuration problems is only done for the daemon startup.
84 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
86 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
87 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
90 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
91 DKIM signing is being done. Previously a transport_filter would always
92 disable CHUNKING, falling back to traditional DATA.
94 JH/05 Regard command-line receipients as tainted.
96 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
98 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
99 PAM library frees one of the arguments given to it, despite the
100 documentation. Therefore a plain malloc must be used.
102 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
103 on-stack buffers were used, resulting in a taint trap when DSN information
104 copied from a received message was written into the buffer.
106 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
107 the ordering of its ARC headers. This caused a crash.
109 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
110 a new record was being constructed with information from the peer, a trap
113 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
114 installation would get error messages from DMARC verify, when it hit the
115 nonexistent file indicated by the default. Distros wanting DMARC enabled
116 should both provide the file and set the option.
117 Also enforce no DMARC verification for command-line sourced messages.
119 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
120 could, depending on the platform, hang at the STARTTLS response.
122 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
123 message on a connection. Previously if one message had ARC headers and
124 the following one did not, a crash could result when adding an
125 Authentication-Results: header.
127 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
128 Exim main code and Exim-related utities. The introduction of taint
129 tracking also did many adjustments to string handling. Since then, eximon
130 frequently terminated with an assert failure.
132 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
133 check for 452 responses. This slightly helps the inefficieny of doing
134 a large alias-expansion into a recipient-limited target. The max_rcpt
135 transport option still applies (and at the current default, will override
136 the new feature). The check is done for either cause of synch, and forces
137 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
138 connection. The new facility is not tunable at this time.
140 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
141 library live data was being used, so the results became garbage. Make
142 copies while it is still usable.
144 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
145 on delivery deferred (==) and failed (**) lines (if a delivery was
146 attemtped). Previously it was only on completion (=>) lines.
148 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
149 for the expansion of the server_scram_iter and server_scram_salt options.
151 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
152 are now specifically given a NO_DATA response without hitting the system
153 resolver. The library goes on to do the now-standard TXT lookup.
154 Use of dnsdb lookups is not affected.
156 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
157 only retrieve the errormessage once. Previously two calls to dlerror()
158 were used, and the second one (for mainlog/paniclog) retrieved null
161 JH/20 Taint checking: disallow use of tainted data for
162 - the appendfile transport file and directory options
163 - the pipe transport command
164 - the autoreply transport file, log and once options
165 - file names used by the redirect router (including filter files)
167 - paths used by single-key lookups
168 Previously this was permitted.
170 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
171 adjusted the size of a major service buffer; this failed because the
172 buffer was in use at the time. Change to a compile-time increase in the
173 buffer size, when this authenticator is compiled into exim.
175 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
176 previous fast-mode was untenable in the face of glibs using mmap to
177 support larger malloc requests.
179 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
180 New values supported, if defined on system where compiled:
181 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
182 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
184 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
185 running a limited number of proceses in parallel, a benefit is gained. The
186 amount varies with the platform hardware and load. The use of the option
187 queue_run_in_order means we cannot do this, as ordering becomes
190 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
191 had introduced a string-copy (for ensuring NUL-termination) which was not
192 appropriate for that case, which can include embedded NUL bytes in the
193 block of data. Investigation showed the copy to actually be needless, the
194 data being length-specified.
196 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
197 done during a receiving connection, and both used TLS, global info was
198 used rather than per-connection info for tracking the state of data
199 queued for transmission. This could result in a connection hang.
201 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
202 Previously, when delivering serveral messages down a single connection
203 only the first would provide a SIZE. This was due to the size information
204 not being properly tracked.
206 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
207 TAI (at 37 seconds currently), pretend to be in UTC for time-related
208 expansion and logging. Previously, spurious values such as a future
209 minute could be seen.
211 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
212 it could crash from a null-deref. This could also affect the
213 ${addresses: } operator and ${readsock } item.
215 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
216 message following a mime one, the variable was not reset.
218 JH/30 When an pipelined-connect fails at the first response, assume incorrect
219 cached capability (perhaps the peer reneged?) and immediately retry in
222 JH/31 Fix spurious detection of timeout while writing to transport filter.
224 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
225 an attempt to copy the string was made before checking it.
227 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
228 taint of the lookup key was maintained; we now regard the presence in the
229 filesystem as sufficient validation.
231 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
232 argument is supplied.
234 JH/35 The dsearch lookup now requires that the directory is an absolute path.
235 Previously this was not checked, and nonempty relative paths made an
236 access under Exim's current working directory.
238 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
239 Previously no event was raised.
241 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
242 parameter supplied by the sender MAIL FROM command. Previously it was
243 ignored, and only the check_spool_space option value for the required
246 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
247 the size of the signing public-key. Previously it was instead giving
248 the size of the signature hash.
250 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
251 the default. See the (new) dkim_verify_min_keysizes option.
253 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
254 and an ACL use a lookup for checking either the local_part or domain,
255 stale data could be accessed. Ensure that variable references are
256 dropped between messages.
258 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
259 by the client was not checked as pointing within response data before
260 being used. A malicious client could thus cause an out-of-bounds read and
261 possibly gain authentication. Fix by adding the check.
263 JH/42 Internationalisation: change the default for downconversion in the smtp
264 transport to be "if needed". Previously it was "as previously set" for
265 the message, which usually meant "if needed" for message-submission but
266 "no" for everything else. However, MTAs have been seen using SMTPUTF8
267 even when the envelope addresses did not need it, resulting in forwarding
268 failures to non-supporting MTAs. A downconvert in such cases will be
269 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
270 transport. The change does mean that addresses needing conversion will
271 be converted when previously a delivery failure would occur.
273 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
274 response was received it would be used unchecked in a fail-DSN, violating
275 standards on line-length limits. Truncate if needed.
277 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
278 doesn't work. (Additionally add a new main config option to configure the
285 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
286 side, to decode a TLS 1.3 packet capture.
288 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
289 Previously the default library behaviour applied, sending two, each in
292 JH/03 Debug output for ACL now gives the config file name and line number for
295 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
297 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
299 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
300 buffer overrun for (non-chunking) other transports.
302 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
303 TLS1.3, means that a server rejecting a client certificate is not visible
304 to the client until the first read of encrypted data (typically the
305 response to EHLO). Add detection for that case and treat it as a failed
306 TLS connection attempt, so that the normal retry-in-clear can work (if
307 suitably configured).
309 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
310 and/or domain. Found and fixed by Jason Betts.
312 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
313 configuration). If a CNAME target was not a wellformed name pattern, a
316 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
317 the OS reports them interleaved with other addresses.
319 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
320 used both for input and for a verify callout, both encrypted, SMTP
321 responses being sent by the server could be lost. This resulted in
322 dropped connections and sometimes bounces generated by a peer sending
325 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
326 string. Previously it was possible to cause undefined behaviour in a
327 library routine (usually a crash). Found by "zerons".
329 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
332 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
333 API was removed, so update to use the newer ones.
335 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
336 any timeout set, is taking a long time. Previously we would hang on to a
337 rotated logfile "forever" if the input was arriving with long gaps
338 (a previous attempt to fix addressed lack, for a long time, of initial
341 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
342 shared (NFS) environment. The length of the tempfile name is now
343 4 + 16 ("hdr.$message_exim_id") which might break on file
344 systems which restrict the file name length to lower values.
347 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
348 shared (NFS) environment.
350 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
351 did for all versions <4.90). Notably -M, -m, --invert, -I may be
354 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
355 on some platforms for bit 31.
357 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
358 to changes apparently associated with TLS1.3 handling some of the APIs
359 previously used were either nonfunctional or inappropriate. Strings
360 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
361 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
362 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
363 This affects log line X= elements, the $tls_{in,out}_cipher variables,
364 and the use of specific cipher names in the encrypted= ACL condition.
366 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
368 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
369 verification result was not updated unless hosts_require_ocsp applied.
371 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
372 queue_list_requires_admin set to false, non-admin users were denied the
375 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
376 directory-of-certs mode. Previously they were advertised despite the
379 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
380 A single TCP connection by a client will now hold a TLS connection open
381 for multiple message deliveries, by default. Previously the default was to
384 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
385 default. If built with the facility, DANE will be used. The facility
386 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
388 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
389 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
390 must be defined and you must still, unless you define DISABLE_TLS, manage
391 the the include-dir and library-file requirements that go with that
392 choice. Non-TLS builds are still supported.
394 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
397 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
398 default. If the platform supports and has the facility enabled, it will
399 be requested on all coneections.
401 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
402 controlled by the build-time option SUPPORT_PIPE_CONNECT.
404 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
406 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
407 success-DSN messages. Previously the From: header was always the default
408 one for these; the option was ignored.
410 JH/28 Fix the timeout on smtp response to apply to the whole response.
411 Previously it was reset for every read, so a teergrubing peer sending
412 single bytes within the time limit could extend the connection for a
413 long time. Credit to Qualsys Security Advisory Team for the discovery.
415 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
416 delivery address, which leaked information of the results of local
417 forwarding. Change to the original envelope recipient address, per
420 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
421 requested. Previously not bounce was generated and a log entry of
422 error ignored was made.
424 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
426 JH/32 Introduce a general tainting mechanism for values read from the input
427 channel, and values derived from them. Refuse to expand any tainted
428 values, to catch one form of exploit.
430 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
431 was unused and the unexpanded text used for the test. Found and
432 fixed by Ruben Jenster.
434 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
435 an attempt to use a TLS library read routine dereffed a nul pointer,
438 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
439 them in our smtp response.
441 JH/36 Have the general router option retry_use_local_part default to true when
442 any of the restrictive preconditions are set (to anything). Previously it
443 was only for check_local user. The change removes one item of manual
444 configuration which is required for proper retries when a remote router
445 handles a subset of addresses for a domain.
447 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
448 link count into consideration.
450 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
451 caused the extension of big_buffer, the following lines were ignored.
453 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
454 accordance with RFC 2308. Previously there was no expiry, so a longlived
455 receive process (eg. due to ACL delays) versus a short SOA value could
458 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
460 JH/39 Promote DMARC support to mainline.
462 JH/40 Bug 2452: Add a References: header to DSNs.
464 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
465 parameters. The relevant library call is documented as "Deprecated: This
466 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
467 3.6.0, DH parameters are negotiated following RFC7919."
469 HS/06 Change the default of dnssec_request_domains to "*"
471 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
472 carried on and emitted a BDAT command, even when PIPELINING was not
475 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
476 buffer was used for the filename, resulting in a trap when tainted
477 arguments (eg. $domain) were used.
479 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
480 recommended to avoid a possible server-load attack. The feature can be
481 re-enabled via the openssl_options main cofiguration option.
483 JH/45 local_scan API: documented the current smtp_printf() call. This changed
484 for version 4.90 - adding a "more data" boolean to the arguments.
485 Bumped the ABI version number also, this having been missed previously;
486 release versions 4.90 to 4.92.3 inclusive were effectively broken in
487 respect of usage of smtp_printf() by either local_scan code or libraries
488 accessed via the ${dlfunc } expansion item. Both will need coding
489 adjustment for any calls to smtp_printf() to match the new function
490 signature; a FALSE value for the new argument is always safe.
492 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
493 the file-offset (which the Linux syscall does, and exim expects); this
494 resulted in an indefinite loop.
496 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
497 to do ARC verification. The Authentication-Results: header line added
498 by the configuration then had no ARC item.
504 JH/01 Remove code calling the customisable local_scan function, unless a new
505 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
507 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
508 non-signal-safe functions being used.
510 JH/03 Bug 2269: When presented with a received message having a stupidly large
511 number of DKIM-Signature headers, disable DKIM verification to avoid
512 a resource-consumption attack. The limit is set at twenty.
514 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
515 report of oldest_pass in ${authres } in consequence, and separate out
516 some descriptions of reasons for verification fail.
518 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
519 files in the spool were present and unlocked. A queue-runner could spot
520 them, resulting in a duplicate delivery. Fix that by doing the unlock
521 after the unlink. Investigation by Tim Stewart. Take the opportunity to
522 add more error-checking on spoolfile handling while that code is being
525 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
526 No known attacks, no CVE, this is defensive hardening.
528 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
529 a queue-runner could start a delivery while other operations were ongoing.
530 Cutthrough delivery was a common victim, resulting in duplicate delivery.
531 Found and investigated by Tim Stewart. Fix by using the open message data
532 file handle rather than opening another, and not locally closing it (which
533 releases a lock) for that case, while creating the temporary .eml format
534 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
536 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
537 $sender_verify_failure/$recipient_verify_failure to "random".
539 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
542 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
543 Previously this would segfault.
545 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
548 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
549 like zero, since the resolver should be doing this for us, But we need one
550 as a CNAME but no MX presence gets the CNAME returned; we need to check
551 that doesn't point to an MX to declare it "no MX returned" rather than
552 "error, loop". A new main option is added so the older capability of
553 following some limited number of chain links is maintained.
555 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
557 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
558 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
559 now-deprecated earlier definitions used only specified the range up to TLS
560 1.2 (in the older-version library docs).
562 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
564 JH/15 Rework TLS client-side context management. Stop using a global, and
565 explicitly pass a context around. This enables future use of TLS for
566 connections to service-daemons (eg. malware scanning) while a client smtp
567 connection is using TLS; with cutthrough connections this is quite likely.
569 JH/16 Fix ARC verification to do AS checks in reverse order.
571 JH/17 Support a "tls" option on the ${readsocket } expansion item.
573 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
574 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
575 Previously the "utf8" would be re-prepended for every additional message.
577 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
578 Previously thery were accepted, resulting in issues when attempting to
579 forward messages to a non-supporting MTA.
581 PP/02 Let -n work with printing macros too, not just options.
583 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
584 one parent address was copied, and bogus data was used at delivery-logging
585 time. Either a crash (after delivery) or bogus log data could result.
586 Discovery and analysis by Tim Stewart.
588 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
589 Previously if the string ended mid-character, we did not insert the
590 promised '?' replacement.
592 PP/04 Documentation: current string operators work on bytes, not codepoints.
594 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
595 should pack well giving a smaller memory footprint so better caching and
596 therefore performance. Group the declarations where this can't be done so
597 that the byte-sized flag variables are not interspersed among pointer
598 variables, giving a better chance of good packing by the compiler.
600 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
601 non-null, to avoid issues with sites running BATV. Previously reports were
602 sent with an empty envelope sender so looked like bounces.
604 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
605 The ignore_error flag wasn't being returned from the filter subprocess so
606 was not set for later routers. Investigation and fix by Matthias Kurz.
608 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
609 and a msg:complete for the whole, when a message is manually removed using
610 -Mrm. Developement by Matthias Kurz, hacked on by JH.
612 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
613 a "Gnu special" function, asprintf() in the DB utility binary builds; I
614 hope that is portable enough.
616 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
617 requiring a known-CA anchor certificate; make it now rely entirely on the
618 TLSA as an anchor. Checking the name on the leaf cert against the name
619 on the A-record for the host is still done for TA (but not for EE mode).
621 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
622 included in delivery lines for non-proxied connections, when compiled with
623 SUPPORT_SOCKS and running with proxy logging enabled.
625 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
626 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
627 move the existing event to fire before the normal logging of message
628 failure so that custom logging is bracketed by normal logging.
630 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
631 msg:fail:internal event. Developement by Matthias Kurz.
633 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
634 far too small for todays use of crypto signatures stored there. Go all
635 the way to the max DNS message size of 64kB, even though this might be
636 overmuch for IOT constrained device use.
638 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
639 copy a string over itself. The library routine is documented as not
640 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
642 JH/32 For main options check_spool_space and check_inode_space, where the
643 platform supports 64b integers, support more than the previous 2^31 kB
644 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
645 the previous G, M, k.
647 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
648 $authenticated_fail_id variable on authentication failure. Previously
651 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
652 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
653 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
654 GNUTLS_SEC_PARAM_MEDIUM.
656 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
657 side. Previously we would continue as if no SNI had been received.
659 JH/36 Harden the handling of string-lists. When a list consisted of a sole
660 "<" character, which should be a list-separator specification, we walked
661 off past the nul-terimation.
663 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
664 causes) even when the retry time is not yet met. Previously they were
665 not, meaning that when (say) an account was over-quota and temp-rejecting,
666 and multiple senders' messages were queued, only one sender would get
667 notified on each configured delay_warning cycle.
669 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
671 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
672 cipher-suites, an error can be left on the stack even for a succeeding
673 accept; this results in impossible error messages when a later operation
676 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
677 return error codes indicating retry. Under TLS1.3 this becomes required.
679 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
680 it only wrote the new authenticators, resulting in a lack of tracking of
681 peer changes of ESMTP extensions until the next cache flush.
683 JH/41 Fix the loop reading a message header line to check for integer overflow,
684 and more-often against header_maxsize. Previously a crafted message could
685 induce a crash of the recive process; now the message is cleanly rejected.
687 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
688 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
694 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
695 When redis_servers is set to a list of > 1 element, and the Redis servers
696 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
697 case of MOVED into a DEFER case instead, thus moving the query onto the
698 next server in the list. For a cluster of N elements, all N servers must
699 be defined in redis_servers.
701 GF/02 Catch and remove uninitialized value warning in exiqsumm
702 Check for existence of @ARGV before looking at $ARGV[0]
704 JH/01 Replace the store_release() internal interface with store_newblock(),
705 which internalises the check required to safely use the old one, plus
706 the allocate and data copy operations duplicated in both (!) of the
707 extant use locations.
709 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
710 modifier. This matches the restriction on the commandline.
712 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
713 Previously only the last row was returned.
715 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
716 we assumed that tags in the header were well-formed, and parsed the
717 element content after inspecting only the first char of the tag.
718 Assumptions at that stage could crash the receive process on malformed
721 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
722 While running the DKIM ACL we operate on the Permanent memory pool so that
723 variables created with "set" persist to the DATA ACL. Also (at any time)
724 DNS lookups that fail create cache records using the Permanent pool. But
725 expansions release any allocations made on the current pool - so a dnsdb
726 lookup expansion done in the DKIM ACL releases the memory used for the
727 DNS negative-cache, and bad things result. Solution is to switch to the
728 Main pool for expansions.
729 While we're in that code, add checks on the DNS cache during store_reset,
730 active in the testsuite.
731 Problem spotted, and debugging aided, by Wolfgang Breyha.
733 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
734 When none of the hosts presented to a transport match an already-open
735 connection, close it and proceed with the list. Previously we would
736 queue the message. Spotted by Lena with Yahoo, probably involving
739 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
740 Previously a spurious "250 OK id=" response was appended to the proper
743 JH/08 The "support for" informational output now, which built with Content
744 Scanning support, has a line for the malware scanner interfaces compiled
745 in. Interface can be individually included or not at build time.
747 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
748 by the template makefile "src/EDITME". The "STREAM" support for an older
749 ClamAV interface method is removed.
751 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
752 rows affected is given instead).
754 JH/11 The runtime Berkeley DB library version is now additionally output by
755 "exim -d -bV". Previously only the compile-time version was shown.
757 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
758 SMTP connection. Previously, when one had more receipients than the
759 first, an abortive onward connection was made. Move to full support for
760 multiple onward connections in sequence, handling cutthrough connection
761 for all multi-message initiating connections.
763 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
764 routers. Previously, a multi-recipient message would fail to match the
765 onward-connection opened for the first recipient, and cause its closure.
767 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
768 a timeout on read on a GnuTLS initiating connection, resulting in the
769 initiating connection being dropped. This mattered most when the callout
770 was marked defer_ok. Fix to keep the two timeout-detection methods
773 JH/15 Relax results from ACL control request to enable cutthrough, in
774 unsupported situations, from error to silently (except under debug)
775 ignoring. This covers use with PRDR, frozen messages, queue-only and
778 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
780 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
781 metadata, resulting in a crash in free().
783 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
784 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
785 Broken also in d185889f4, with init system revamp.
787 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
788 Previously we abruptly closed the connection after reading a malware-
789 found indication; now we go on to read the "scan ok" response line,
792 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
793 ACL. Previously, a crash would result.
795 JH/19 Speed up macro lookups during configuration file read, by skipping non-
796 macro text after a replacement (previously it was only once per line) and
797 by skipping builtin macros when searching for an uppercase lead character.
799 JH/20 DANE support moved from Experimental to mainline. The Makefile control
800 for the build is renamed.
802 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
803 was allocated for every new TLS startup, meaning one per message. Fix
804 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
806 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
807 reported the original. Fix to report (as far as possible) the ACL
808 result replacing the original.
810 JH/23 Fix memory leak during multi-message connections using STARTTLS under
811 OpenSSL. Certificate information is loaded for every new TLS startup,
812 and the resources needed to be freed.
814 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
816 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
819 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
820 DATA response info to the (existing) per-recipient response info for
821 the "C=" log element. It can have useful tracking info from the
822 destination system. Patch from Simon Arlott.
824 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
825 length value. Previously this would segfault.
827 HS/02 Support Avast multiline protoocol, this allows passing flags to
828 newer versions of the scanner.
830 JH/28 Ensure that variables possibly set during message acceptance are marked
831 dead before release of memory in the daemon loop. This stops complaints
832 about them when the debug_store option is enabled. Discovered specifically
833 for sender_rate_period, but applies to a whole set of variables.
834 Do the same for the queue-runner and queue-list loops, for variables set
835 from spool message files. Do the same for the SMTP per-message loop, for
836 certain variables indirectly set in ACL operations.
838 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
839 as a multi-recipient message from a mailinglist manager). The coding had
840 an arbitrary cutoff number of characters while checking for more input;
841 enforced by writing a NUL into the buffer. This corrupted long / fast
842 input. The problem was exposed more widely when more pipelineing of SMTP
843 responses was introduced, and one Exim system was feeding another.
844 The symptom is log complaints of SMTP syntax error (NUL chars) on the
845 receiving system, and refused recipients seen by the sending system
846 (propating to people being dropped from mailing lists).
847 Discovered and pinpointed by David Carter.
849 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
850 replaced by the ${authresults } expansion.
852 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
854 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
855 allows proper process termination in container environments.
857 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
858 Previously the "final dot" had a newline after it; ensure it is CR,LF.
860 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
861 and "err_perm", deprecated since 4.83 when the RFC-defined words
862 "temperror" and "permerror" were introduced.
864 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
865 transport-filters or DKIM-signing. The restriction was lost in the
866 consolidation of verify-callout and delivery SMTP handling.
867 Extend the restriction to also cover ARC-signing.
869 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
870 in defer=pass mode supply a 450 to the initiator. Previously the message
873 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
874 tls_require_ciphers is used as before.
876 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
877 "pass_unscanned". Only tmpfails from the scanner are written to
878 the paniclog, as they may require admin intervention (permission
879 denied, license issues). Other scanner errors (like decompression
880 bombs) do not cause a paniclog entry.
882 JH/36 Fix reinitialisation of DKIM logging variable between messages.
883 Previously it was possible to log spurious information in receive log
886 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
887 triggered odd behaviour from Outlook Express clients.
889 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
892 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
893 since the IETF WG has not yet settled on that versus the original
894 "bare" representation.
896 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
897 Previously the millisecond value corrupted the output.
898 Fix also for syslog_pid=no and log_selector +pid, for which the pid
899 corrupted the output.
905 JH/01 Rework error string handling in TLS interface so that the caller in
906 more cases is responsible for logging. This permits library-sourced
907 string to be attached to addresses during delivery, and collapses
908 pairs of long lines into single ones.
910 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
911 during configuration. Wildcards are allowed and expanded.
913 JH/02 Rework error string handling in DKIM to pass more info back to callers.
914 This permits better logging.
916 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
917 do not close it down and have the child transport start it up again on
918 the passed-on TCP connection. Instead, proxy the child (and any
919 subsequent ones) for TLS via a unix-domain socket channel. Logging is
920 affected: the continued delivery log lines do not have any DNSSEC, TLS
921 Certificate or OCSP information. TLS cipher information is still logged.
923 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
924 identical IP addresses on different listening ports. Will also affect
927 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
928 add noisy ifdef guards to special-case this sillyness.
929 Patch from Bernd Kuhls.
931 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
932 than 255 are no longer allowed.
934 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
935 Disable the session-cache too, which might reduce our load. Since we
936 currrectly use a new context for every connection, both as server and
937 client, there is no benefit for these.
938 GnuTLS appears to not support tickets server-side by default (we don't
939 call gnutls_session_ticket_enable_server()) but client side is enabled
940 by default on recent versions (3.1.3 +) unless the PFS priority string
943 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
944 <https://reproducible-builds.org/specs/source-date-epoch/>.
946 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
947 the check for any unsuccessful recipients did not notice the limit, and
948 erroneously found still-pending ones.
950 JH/08 Pipeline CHUNKING command and data together, on kernels that support
951 MSG_MORE. Only in-clear (not on TLS connections).
953 JH/09 Avoid using a temporary file during transport using dkim. Unless a
954 transport-filter is involved we can buffer the headers in memory for
955 creating the signature, and read the spool data file once for the
956 signature and again for transmission.
958 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
959 4.77 as the kernel support then wasn't solid, having issues in 64bit
960 mode. Now, it's been long enough. Add support for FreeBSD also.
962 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
963 case where the routing stage had gathered several addresses to send to
964 a host before calling the transport for the first, we previously failed
965 to close down TLS in the old transport process before passing the TCP
966 connection to the new process. The new one sent a STARTTLS command
967 which naturally failed, giving a failed delivery and bloating the retry
968 database. Investigation and fix prototype from Wolfgang Breyha.
970 JH/12 Fix check on SMTP command input synchronisation. Previously there were
971 false-negatives in the check that the sender had not preempted a response
972 or prompt from Exim (running as a server), due to that code's lack of
973 awareness of the SMTP input buffering.
975 PP/04 Add commandline_checks_require_admin option.
976 Exim drops privileges sanely, various checks such as -be aren't a
977 security problem, as long as you trust local users with access to their
978 own account. When invoked by services which pass untrusted data to
979 Exim, this might be an issue. Set this option in main configuration
980 AND make fixes to the calling application, such as using `--` to stop
983 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
984 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
985 responses to those, into a single TLS record each way (this usually means
986 a single packet). As a side issue, smtp_enforce_sync now works on TLS
989 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
990 affects you only if you're dancing at the edge of the param size limits.
991 If you are, and this message makes sense to you, then: raise the
992 configured limit or use OpenSSL 1.1. Nothing we can do for older
995 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
996 cmdline element to get the documented default one. Previously it was
999 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1000 are unsuable for non-message-specific reasons - eg. connection timeout,
1001 banner-time rejection.
1003 JH/16 Fix logging of delivery remote port, when specified by router, under
1006 PP/06 Repair manualroute's ability to take options in any order, even if one
1007 is the name of a transport.
1010 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1012 JH/17 Change the list-building routines interface to use the expanding-string
1013 triplet model, for better allocation and copying behaviour.
1015 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1016 Previously it was constructed the first time a possibly-matching string
1017 was met in the configuration file input during startup; now it is done
1020 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1021 compatible one, to avoid the (poorly documented) possibility of a config
1022 file in the working directory redirecting the DB files, possibly correpting
1023 some existing file. CVE-2017-10140 assigned for BDB.
1025 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1026 cache-hot. Previously, although the result was properly cached, the
1027 initial verify call returned a defer.
1029 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1030 the main verify for receipient in uncached-mode.
1032 JH/22 Retire historical build files to an "unsupported" subdir. These are
1033 defined as "ones for which we have no current evidence of testing".
1035 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1036 if present. Previously it was ignored.
1038 JH/24 Start using specified-initialisers in C structure init coding. This is
1039 a C99 feature (it's 2017, so now considered safe).
1041 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1042 if was a fixed-sized field and bitmask ops via macros; it is now more
1045 PP/07 GitHub PR 56: Apply MariaDB build fix.
1046 Patch provided by Jaroslav Škarvada.
1048 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1049 during Coverity cleanups [4.87 JH/47]
1050 Diagnosis and fix provided by Michael Fischer v. Mollard.
1052 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1053 the right size to place the terminating semicolon on its own folded
1054 line, the header hash was calculated to an incorrect value thanks to
1055 the (relaxed) space the fold became.
1057 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1058 and confused the parent.
1060 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1061 which could crash as a result. This could lead to undeliverable messages.
1063 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1066 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1067 matters on fast-turnover and PID-randomising systems, which were getting
1068 out-of-order delivery.
1070 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1071 a possibly-overlapping copy. The symptom was that "Remote host closed
1072 connection in response to HELO" was logged instead of the actual 4xx
1075 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1076 Previously only that bufferd was discarded, resulting in SYMTP command
1079 JH/32 DKIM: when a message has multiple signatures matching an identity given
1080 in dkim_verify_signers, run the dkim acl once for each. Previously only
1081 one run was done. Bug 2189.
1083 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1084 "panic the current process" to "deliberately defer". The panic log is
1085 still written with the problem list name; the mail and reject logs now
1086 get a temp-reject line for the message that was being handled, saying
1087 something like "domains check lookup or other defer". The SMTP 451
1088 message is still "Temporary local problem".
1090 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1091 A crafted sequence of BDAT commands could result in in-use memory beeing
1092 freed. CVE-2017-16943.
1094 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1095 from SMTP input. Previously it was always done; now only done for DATA
1096 and not BDAT commands. CVE-2017-16944.
1098 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1099 to the message (such as an overlong header line). Previously this was
1100 not done and we did not exit BDAT mode. Followon from the previous item
1101 though a different problem.
1107 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1108 than -2003 did; needs libidn2 in addition to libidn.
1110 JH/02 The path option on a pipe transport is now expanded before use.
1112 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1113 Patch provided by "Björn", documentation fix added too.
1115 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1116 missing a wire-to-host endian conversion.
1118 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1119 close after a BDAT command line could be taken as a following command,
1120 giving a synch failure. Fix by only checking for synch immediately
1121 before acknowledging the chunk.
1123 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1124 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1125 macro. Patches provided by Josh Soref.
1127 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1128 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1129 by IANA as a service extension. However, John Klensin suggests that we
1132 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1133 the dkim code may be unix-mode line endings rather than smtp wire-format
1134 CRLF, so prepend a CR to any bare LF.
1136 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1137 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1139 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1140 the first were themselves being wrongly included in the feed into dkim
1141 processing; with most chunk sizes in use this resulted in an incorrect
1142 body hash calculated value.
1144 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1145 DKIM signature block, for verification. Although advised against by
1146 standards it is specifically not ruled illegal.
1148 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1150 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1151 missing a body hash (the bh= tag).
1153 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1154 It seems that HAProxy sends the Proxy Protocol information in clear and
1155 only then does a TLS startup, so do the same.
1157 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1158 TCP connections (such as for Spamd) unless the daemon successfully set
1159 Fast Open mode on its listening sockets. This fixes breakage seen on
1160 too-old kernels or those not configured for Fast Open, at the cost of
1161 requiring both directions being enabled for TFO, and TFO never being used
1162 by non-daemon-related Exim processes.
1164 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1165 endings, at least on the first header line. Try to canonify any that get
1166 past that check, despite the cost.
1168 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1169 now limited to an arbitrary five deep, while parsing addresses with the
1170 strip_excess_angle_brackets option enabled.
1172 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1173 instead leave the unprompted TLS handshake in socket buffer for the
1174 TLS library to consume.
1176 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1178 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1180 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1181 region in one operation, for speed, and this leaves assigned pointers
1182 dangling. Add checks run only under the testsuite which checks all
1183 variables at a store-reset and panics on a dangling pointer; add code
1184 explicitly nulling out all the variables discovered. Fixes one known
1185 bug: a transport crash, where a dangling pointer for $sending_ip_address
1186 originally assigned in a verify callout, is re-used.
1188 PP/06 Drop '.' from @INC in various Perl scripts.
1190 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1192 PP/08 Reduce a number of compilation warnings under clang; building with
1193 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1194 should be warning-free.
1196 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1198 HS/01 Fix portability problems introduced by PP/08 for platforms where
1199 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1201 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1202 chunk. This allows us to accept broken chunked messages. We need a more
1203 general solution here.
1205 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1206 already-broken messages in the queue.
1208 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1210 JH/19 Fix reference counting bug in routing-generated-address tracking.
1216 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1217 supports it and a size is available (ie. the sending peer gave us one).
1219 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1220 years of being deprecated). The replacements are the ACLs
1221 acl_smtp_mime and acl_not_smtp_mime.
1223 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1224 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1225 or even an in-clear connection were permitted. Now, if the host lookup
1226 was dnssec and dane was requested then the host is only used if the
1227 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1228 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1229 if one fails this test.
1230 This means that a poorly-configured remote DNS will make it incommunicado;
1231 but it protects against a DNS-interception attack on it.
1233 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1234 non-noisy when a race steals the message being considered.
1236 JH/05 If main configuration option tls_certificate is unset, generate a
1237 self-signed certificate for inbound TLS connections.
1239 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1240 in rewrites and routers.
1242 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1243 and logged a warning sing 4.83; now they are a configuration file error.
1245 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1246 (lacking @domain). Apply the same qualification processing as RCPT.
1248 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1250 JH/10 Support ${sha256:} applied to a string (as well as the previous
1253 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1254 a cutthrough deliver is pending, as we always want to make a connection.
1255 This also avoids re-routing the message when later placing the cutthrough
1256 connection after a verify cache hit.
1257 Do not update it with the verify result either.
1259 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1260 when routing results in more than one destination address.
1262 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1263 signing (which inhibits the cutthrough capability). Previously only
1264 the presence of an option was tested; now an expansion evaluating as
1265 empty is permissible (obviously it should depend only on data available
1266 when the cutthrough connection is made).
1268 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1269 the relevant preceding SMTP command did not note the pipelining mode.
1271 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1272 Previously they were not counted.
1274 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1275 as one having no matching records. Previously we deferred the message
1276 that needed the lookup.
1278 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1279 distinguished as "(=".
1281 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1282 for missing MX records. Previously it only worked for missing A records.
1284 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1286 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1287 after the data-go-ahead and data-ack. Patch from Jason Betts.
1289 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1290 even for a "none" policy. Patch from Tony Meyer.
1292 JH/22 Fix continued use of a connection for further deliveries. If a port was
1293 specified by a router, it must also match for the delivery to be
1296 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1297 When one of the recipients of a message was unsuitable for the connection
1298 (has no matching addresses), we lost track of needing to mark it
1299 deferred. As a result mail would be lost.
1301 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1303 JH/25 Decoding ACL controls is now done using a binary search; the source code
1304 takes up less space and should be simpler to maintain. Merge the ACL
1305 condition decode tables also, with similar effect.
1307 JH/26 Fix problem with one_time used on a redirect router which returned the
1308 parent address unchanged. A retry would see the parent address marked as
1309 delivered, so not attempt the (identical) child. As a result mail would
1312 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1313 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1314 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1317 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1318 Main config options check_{log,spool}_{inodes,space} are now
1319 100 inodes, 10MB unless set otherwise in the configuration.
1321 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1322 Previously it only applied to the main-section connection policy
1325 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1327 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1328 by me. Added RFC7919 DH primes as an alternative.
1330 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1331 are not in the system include path.
1333 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1334 GnuTLS, when a session startup failed (eg because the client disconnected)
1335 Exim did stdio operations after fclose. This was exposed by a recent
1336 change which nulled out the file handle after the fclose.
1338 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1339 signed directly by the cert-signing cert, rather than an intermediate
1340 OCSP-signing cert. This is the model used by LetsEncrypt.
1342 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1344 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1345 an incoming connection.
1347 HS/02 Bug 1802: Do not half-close the connection after sending a request
1350 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1351 fallback to "prime256v1".
1353 JH/34 SECURITY: Use proper copy of DATA command in error message.
1354 Could leak key material. Remotely exploitable. CVE-2016-9963.
1360 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1361 and 3.4.4 - once the server is enabled to respond to an OCSP request
1362 it does even when not requested, resulting in a stapling non-aware
1363 client dropping the TLS connection.
1365 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1366 support variable-length bit vectors. No functional change.
1368 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1369 The I= interface field on outgoing lines is now after the H= remote
1370 host field, same as incoming lines. There is a separate
1371 outgoing_interface log selector which allows you to disable the
1374 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1375 If not running log_selector +smtp_connection the mainlog would be held
1376 open indefinitely after a "too many connections" event, including to a
1377 deleted file after a log rotate. Leave the per net connection logging
1378 leaving it open for efficiency as that will be quickly detected by the
1379 check on the next write.
1381 HS/01 Bug 1671: Fix post transport crash.
1382 Processing the wait-<transport> messages could crash the delivery
1383 process if the message IDs didn't exist for some reason. When
1384 using 'split_spool_directory=yes' the construction of the spool
1385 file name failed already, exposing the same netto behaviour.
1387 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1388 mime_regex ACL conditions.
1390 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1391 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1392 to HELO, local diagnostic string.
1394 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1395 log line to debug. Even when configured with a tls authenticator many
1396 client connections are expected to not authenticate in this way, so
1397 an authenticate fail is not an error.
1399 HS/02 Add the Exim version string to the process info. This way exiwhat
1400 gives some more detail about the running daemon.
1402 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1403 matter for fast-change records such as DNSBLs.
1405 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1406 retry record, even if constant. There may be multiple transports with
1407 different interface settings and the retry behaviour needs to be kept
1410 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1412 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1414 JH/10 Bug 840: fix log_defer_output option of pipe transport
1416 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1417 hosts_randomize. This matters a lot when combined with mua_wrapper.
1419 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1420 ${quote_pgsql:<string>} operator.
1422 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1424 JH/14 Change header file name for freeradius-client. Relevant if compiling
1425 with Radius support; from the Gentoo tree and checked under Fedora.
1427 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1429 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1430 option transport_filter, meaning no filtering.
1432 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1434 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1435 defaults to "*" (all hosts). The variable is now available when not built
1436 with TLS, default unset, mainly to enable keeping the testsuite sane.
1437 If a server certificate is not supplied (via tls_certificate) an error is
1438 logged, and clients will find TLS connections fail on startup. Presumably
1439 they will retry in-clear.
1440 Packagers of Exim are strongly encouraged to create a server certificate
1441 at installation time.
1443 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1444 with the $config_file variable.
1446 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1447 in transport context, after the attempt, and per-recipient. The latter type
1448 is per host attempted. The event data is the error message, and the errno
1449 information encodes the lookup type (A vs. MX) used for the (first) host,
1450 and the trailing two digits of the smtp 4xx response.
1452 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1453 to write to mainlog (or rejectlog, paniclog) in the window between file
1454 creation and permissions/ownership being changed. Particularly affects
1455 installations where exicyclog is run as root, rather than exim user;
1456 result is that the running daemon panics and dies.
1458 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1460 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1461 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1462 "pri" and "weight". Note that the previous implicit priority given by the
1463 list order is no longer honoured.
1465 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1466 for DKIM processing.
1468 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1469 by defining SUPPORT_SOCKS.
1471 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1472 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1473 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1474 variables are renamed to proxy_{local,external}_{address,port}.
1476 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1477 for a build by defining SUPPORT_I18N
1479 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1480 of the query string, and make ${quote_redis:} do that quoting.
1482 JH/29 Move Events support from Experimental to mainline, enabled by default
1483 and removable for a build by defining DISABLE_EVENT.
1485 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1487 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1488 cached by the daemon.
1490 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1491 by defining LOOKUP_REDIS. The libhiredis library is required.
1493 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1494 keys are given for lookup.
1496 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1497 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1498 only supported when built with TLS support. The PolarSSL SHA routines
1499 are still used when the TLS library is too old for convenient support.
1501 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1502 openssl_options), for security. OpenSSL forces this from version 1.1.0
1503 server-side so match that on older versions.
1505 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1506 allocation for $value could be released as the expansion processing
1507 concluded, but leaving the global pointer active for it.
1509 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1510 and to use the domains and local_parts ACL conditions.
1512 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1513 incorrectly not doubled on cutthrough transmission, hence seen as a
1514 body-termination at the receiving system - resulting in truncated mails.
1515 Commonly the sender saw a TCP-level error, and retransmitted the message
1516 via the normal store-and-forward channel. This could result in duplicates
1517 received - but deduplicating mailstores were liable to retain only the
1518 initial truncated version.
1520 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1522 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1524 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1525 we're in there, support oversigning also; bug 1309.
1527 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1529 HS/04 Add support for keep_environment and add_environment options.
1531 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1532 either intentional arithmetic overflow during PRNG, or testing config-
1535 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1536 delivery resulted in actual delivery. Cancel cutthrough before DATA
1539 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1540 rejects a recipient: pass the reject to the originator.
1542 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1543 Many were false-positives and ignorable, but it's worth fixing the
1546 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1547 for the new environment-manipulation done at startup. Move the routines
1548 from being local to tls.c to being global via the os.c file.
1550 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1551 an extract embedded as result-arg for a map, the first arg for extract
1552 is unavailable so we cannot tell if this is a numbered or keyed
1553 extraction. Accept either.
1559 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1562 JH/02 The smtp transport option "multi_domain" is now expanded.
1564 JH/03 The smtp transport now requests PRDR by default, if the server offers
1567 JH/04 Certificate name checking on server certificates, when exim is a client,
1568 is now done by default. The transport option tls_verify_cert_hostnames
1569 can be used to disable this per-host. The build option
1570 EXPERIMENTAL_CERTNAMES is withdrawn.
1572 JH/05 The value of the tls_verify_certificates smtp transport and main options
1573 default to the word "system" to access the system default CA bundle.
1574 For GnuTLS, only version 3.0.20 or later.
1576 JH/06 Verification of the server certificate for a TLS connection is now tried
1577 (but not required) by default. The verification status is now logged by
1578 default, for both outbound TLS and client-certificate supplying inbound
1581 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1584 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1585 Status Notification (bounce) messages are now MIME format per RFC 3464.
1586 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1587 under the control of the dsn_advertise_hosts option, and routers may
1588 have a dsn_lasthop option.
1590 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1591 default, modifiable by a malware= option. The list separator for
1592 the options can now be changed in the usual way. Bug 68.
1594 JH/10 The smtp_receive_timeout main option is now expanded before use.
1596 JH/11 The incoming_interface log option now also enables logging of the
1597 local interface on delivery outgoing connections.
1599 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1600 if the interface and destination host and port all match.
1602 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1605 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1606 Patch from Andrew Lewis.
1608 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1609 now supports optional time-restrictions, weighting, and priority
1610 modifiers per server. Patch originally by <rommer@active.by>.
1612 JH/16 The spamd_address main option now supports a mixed list of local
1613 and remote servers. Remote servers can be IPv6 addresses, and
1614 specify a port-range.
1616 JH/17 Bug 68: The spamd_address main option now supports an optional
1617 timeout value per server.
1619 JH/18 Bug 1581: Router and transport options headers_add/remove can
1620 now have the list separator specified.
1622 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1625 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1628 JH/21 Support for the A6 type of dns record is withdrawn.
1630 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1631 rather than the verbs used.
1633 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1634 from 255 to 1024 chars.
1636 JH/24 Verification callouts now attempt to use TLS by default.
1638 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1639 are generic router options now. The defaults didn't change.
1641 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1642 Original patch from Alexander Shikoff, worked over by JH.
1644 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1645 files if ZCAT_COMMAND is not executable.
1647 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1649 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1651 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1652 Normally benign, it bites when the pair was led to by a CNAME;
1653 modern usage is to not canonicalize the domain to a CNAME target
1654 (and we were inconsistent anyway for A-only vs AAAA+A).
1656 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1658 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1659 when evaluating $sender_host_dnssec.
1661 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1662 $sender_helo_dnssec variable.
1664 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1666 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1668 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1670 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1671 documented as working, but never had. Support all but $spam_report.
1673 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1674 added for tls authenticator.
1676 HS/03 Add perl_taintmode main config option
1682 TL/01 When running the test suite, the README says that variables such as
1683 no_msglog_check are global and can be placed anywhere in a specific
1684 test's script, however it was observed that placement needed to be near
1685 the beginning for it to behave that way. Changed the runtest perl
1686 script to read through the entire script once to detect and set these
1687 variables, reset to the beginning of the script, and then run through
1688 the script parsing/test process like normal.
1690 TL/02 The BSD's have an arc4random API. One of the functions to induce
1691 adding randomness was arc4random_stir(), but it has been removed in
1692 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1693 function when detected.
1695 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1696 cause callback expansion.
1698 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1699 syntax errors in an expansion can be treated as a string instead of
1700 logging or causing an error, due to the internal use of bool_lax
1701 instead of bool when processing it.
1703 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1704 server certificates when making smtp deliveries.
1706 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1708 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1710 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1712 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1713 Merged patch from Sebastian Wiedenroth.
1715 JH/05 Fix results-pipe from transport process. Several recipients, combined
1716 with certificate use, exposed issues where response data items split
1717 over buffer boundaries were not parsed properly. This eventually
1718 resulted in duplicates being sent. This issue only became common enough
1719 to notice due to the introduction of connection certificate information,
1720 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1722 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1723 size buffer was used, resulting in syntax errors when an expansion
1726 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1727 version 3.3.6 or later.
1729 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1730 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1731 both become "event_action", the variables become $event_name, $event_data
1732 and $event_defer_errno. There is a new variable $verify_mode, usable in
1733 routers, transports and related events. The tls:cert event is now also
1734 raised for inbound connections, if the main configuration event_action
1737 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1738 early OCSP support, but no stapling (appears to be less than 1.0.0).
1740 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1741 server certificate names available under the smtp transport option
1742 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1745 JH/10 Time-related extraction expansions from certificates now use the main
1746 option "timezone" setting for output formatting, and are consistent
1747 between OpenSSL and GnuTLS compilations. Bug 1541.
1749 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1750 encoded parameter in the incoming message. Bug 1558.
1752 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1753 include certificate info, eximon was claiming there were spoolfile
1756 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1758 JH/14 Log delivery-related information more consistently, using the sequence
1759 "H=<name> [<ip>]" wherever possible.
1761 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1762 are problematic for Debian distribution, omit them from the release
1765 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1767 JH/16 Fix string representation of time values on 64bit time_t architectures.
1770 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1771 output list separator was used.
1776 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1777 checkers that were complaining about end of non-void function with no
1780 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1781 This was a regression introduced in 4.83 by another bugfix.
1783 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1785 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1786 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1792 TF/01 Correctly close the server side of TLS when forking for delivery.
1794 When a message was received over SMTP with TLS, Exim failed to clear up
1795 the incoming connection properly after forking off the child process to
1796 deliver the message. In some situations the subsequent outgoing
1797 delivery connection happened to have the same fd number as the incoming
1798 connection previously had. Exim would try to use TLS and fail, logging
1799 a "Bad file descriptor" error.
1801 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1802 utilities have not been installed.
1804 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1805 temporary space as the ACL may create new global variables.
1807 TL/01 LDAP support uses per connection or global context settings, depending
1808 upon the detected version of the libraries at build time.
1810 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1811 to extract and use the src ip:port in logging and expansions as if it
1812 were a direct connection from the outside internet. PPv2 support was
1813 updated based on HAProxy spec change in May 2014.
1815 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1817 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1818 Properly escape header and check for NULL return.
1820 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1823 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1825 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1826 characters in header names, implemented as a verify condition.
1827 Contributed by Michael Fischer v. Mollard.
1829 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1830 results permerror and temperror. Previous values are deprecated but
1831 still accepted. In a future release, err_perm and err_temp will be
1832 completely removed, which will be a backward incompatibility if the
1833 ACL tests for either of these two old results. Patch contributed by
1834 user bes-internal on the mailing list.
1836 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1838 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1839 selectors, in both main and reject logs.
1841 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1844 JH/07 Add malware type "sock" for talking to simple daemon.
1846 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1848 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1849 routers/transports under cutthrough routing.
1851 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1852 numbers. Touch up "bool" conditional to keep the same definition.
1854 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1856 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1858 JH/12 Expand items in router/transport headers_add or headers_remove lists
1859 individually rather than the list as a whole. Bug 1452.
1861 Required for reasonable handling of multiple headers_ options when
1862 they may be empty; requires that headers_remove items with embedded
1863 colons must have them doubled (or the list-separator changed).
1865 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1866 view the policy declared in the DMARC record. Currently, $dmarc_status
1867 is a combined value of both the record presence and the result of the
1870 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1872 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1873 dnslookup router and the smtp transport (applying to the forward
1876 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1877 of ldap servers used for a specific lookup. Patch provided by Heiko
1880 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1881 New variable $lookup_dnssec_authenticated for observability.
1883 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1884 Patch submitted by Lars Timman.
1886 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1888 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1889 Requires trusted mode and valid format message id, aborts otherwise.
1890 Patch contributed by Heiko Schlichting.
1892 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1893 certextract with support for various fields. Bug 1358.
1895 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1896 is requested by default, modifiable by smtp transport option
1899 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1900 operate on certificate variables to give certificate fingerprints
1901 Also new ${sha256:cert_variable}.
1903 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1905 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1906 Christian Aistleitner.
1908 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1910 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1911 file. Patch from Wolfgang Breyha.
1913 JH/25 Expand the coverage of the delivery $host and $host_address to
1914 client authenticators run in verify callout. Bug 1476.
1916 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1917 align with daemon_smtp_ports. Bug 72.
1919 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1920 support and error reporting did not work properly.
1922 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1923 and is readable. Patch from Andrew Colin Kissa.
1925 TL/14 Enhance documentation of ${run expansion and how it parses the
1926 commandline after expansion, particularly in the case when an
1927 unquoted variable expansion results in an empty value.
1929 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1931 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1932 by renaming away from it. Addresses GH issue 15, reported by
1935 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1937 TL/15 SECURITY: prevent double expansion in math comparison functions
1938 (can expand unsanitized data). Not remotely exploitable.
1945 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1947 PP/02 Make -n do something, by making it not do something.
1948 When combined with -bP, the name of an option is not output.
1950 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1953 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1954 $sender_host_name and config options to manage this, and basic check
1957 PP/05 DSCP support for outbound connections and control modifier for inbound.
1959 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1960 (Only plugin which currently uses this is kerberos4, which nobody should
1961 be using, but we should make it available and other future plugins might
1962 conceivably use it, even though it would break NAT; stuff *should* be
1963 using channel bindings instead).
1965 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1966 name; added for Sendmail compatibility; requires admin caller.
1967 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1968 just ignore it); requires trusted caller.
1969 Also parse but ignore: -Ac -Am -X<logfile>
1972 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1974 TL/02 Add +smtp_confirmation as a default logging option.
1976 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1977 Patch by Magnus Holmgren from 2007-02-20.
1979 TL/04 Bugzilla 1281 - Spec typo.
1980 Bugzilla 1283 - Spec typo.
1981 Bugzilla 1290 - Spec grammar fixes.
1983 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1985 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1987 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1988 mailing list by by Dmitry Isaikin.
1990 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1992 JH/02 Support "G" suffix to numbers in ${if comparisons.
1994 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1996 NM/01 Bugzilla 1197 - Spec typo
1997 Bugzilla 1196 - Spec examples corrections
1999 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2001 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2002 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2005 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2006 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2008 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2009 "acl {{name}{arg}...}", and optional args on acl condition
2012 JH/05 Permit multiple router/transport headers_add/remove lines.
2014 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2016 JH/07 Avoid using a waiting database for a single-message-only transport.
2017 Performance patch from Paul Fisher. Bugzilla 1262.
2019 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2022 JH/09 Add $headers_added variable, with content from use of ACL modifier
2023 add_header (but not yet added to the message). Bugzilla 199.
2025 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2026 Pulled from Bugzilla 817 by Wolfgang Breyha.
2028 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2030 (nb: this is the same fix as in Exim 4.80.1)
2032 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2035 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2038 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2040 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2041 advertise SMTP AUTH mechanism to us, instead of a generic
2042 protocol violation error. Also, make Exim more robust to bad
2043 data from the Dovecot auth socket.
2045 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2047 When a queue runner is handling a message, Exim first routes the
2048 recipient addresses, during which it prunes them based on the retry
2049 hints database. After that it attempts to deliver the message to
2050 any remaining recipients. It then updates the hints database using
2053 So if a recipient address works intermittently, it can get repeatedly
2054 deferred at routing time. The retry hints record remains fresh so the
2055 address never reaches the final cutoff time.
2057 This is a fairly common occurrence when a user is bumping up against
2058 their storage quota. Exim had some logic in its local delivery code
2059 to deal with this. However it did not apply to per-recipient defers
2060 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2062 This change adds a proper retry rule check during routing so that the
2063 final cutoff time is checked against the message's age. We only do
2064 this check if there is an address retry record and there is not a
2065 domain retry record; this implies that previous attempts to handle
2066 the address had the retry_use_local_parts option turned on. We use
2067 this as an approximation for the destination being like a local
2068 delivery, as in LMTP.
2070 I suspect this new check makes the old local delivery cutoff check
2071 redundant, but I have not verified this so I left the code in place.
2073 TF/02 Correct gecos expansion when From: is a prefix of the username.
2075 Test 0254 submits a message to Exim with the header
2079 When I ran the test suite under the user fanf2, Exim expanded
2080 the header to contain my full name, whereas it should have added
2081 a Resent-Sender: header. It erroneously treats any prefix of the
2082 username as equal to the username.
2084 This change corrects that bug.
2086 GF/01 DCC debug and logging tidyup
2087 Error conditions log to paniclog rather than rejectlog.
2088 Debug lines prefixed by "DCC: " to remove any ambiguity.
2090 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2092 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2093 Bug spotted by Jeremy Harris; was flawed since initial commit.
2094 Would have resulted in OCSP responses post-SNI triggering an Exim
2095 NULL dereference and crash.
2097 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2099 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2100 Bug detection, analysis and fix by Samuel Thibault.
2101 Bugzilla 1331, Debian bug #698092.
2103 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2105 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2106 Server implementation by Todd Lyons, client by JH.
2107 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2108 config variable "prdr_enable" controls whether the server
2109 advertises the facility. If the client requests PRDR a new
2110 acl_data_smtp_prdr ACL is called once for each recipient, after
2111 the body content is received and before the acl_smtp_data ACL.
2112 The client is controlled by both of: a hosts_try_prdr option
2113 on the smtp transport, and the server advertisement.
2114 Default client logging of deliveries and rejections involving
2115 PRDR are flagged with the string "PRDR".
2117 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2118 fclose(). Diagnosis by Todd Lyons.
2120 PP/17 Update configure.default to handle IPv6 localhost better.
2121 Patch by Alain Williams (plus minor tweaks).
2124 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2125 This is now consistent with GnuTLS, and is now documented: the
2126 previous undocumented portable approach to treating the option as
2127 unset was to force an expansion failure. That still works, and
2128 an empty string is now equivalent.
2130 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2131 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2132 not performing validation itself.
2134 PP/20 Added force_command boolean option to pipe transport.
2135 Patch from Nick Koston, of cPanel Inc.
2137 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2140 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2142 PP/21 Fix eximon continuous updating with timestamped log-files.
2143 Broken in a format-string cleanup in 4.80, missed when I repaired the
2144 other false fix of the same issue.
2145 Report and fix from Heiko Schlichting.
2148 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2149 Report from Prashanth Katuri.
2151 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2152 It's SecureTransport, so affects any MacOS clients which use the
2153 system-integrated TLS libraries, including email clients.
2155 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2156 using a MIME ACL for non-SMTP local injection.
2157 Report and assistance in diagnosis by Warren Baker.
2159 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2161 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2163 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2164 last id that failed so it may be referenced in subsequent ACL's.
2166 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2169 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2170 ldap library initialization, allowing self-signed CA's to be
2171 used. Also properly sets require_cert option later in code by
2172 using NULL (global ldap config) instead of ldap handle (per
2173 session). Bug diagnosis and testing by alxgomz.
2175 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2176 the src/util/ subdirectory.
2178 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2179 renamed to Transport Post Delivery Action by Jeremy Harris, as
2182 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2183 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2184 redis_servers = needs to be configured which will be used by the redis
2185 lookup. Patch from Warren Baker, of The Packet Hub.
2187 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2189 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2190 hostname or reverse DNS when processing a host list. Used suggestions
2191 from multiple comments on this bug.
2193 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2195 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2196 Missed a few lines, added it to make the runtest require no keyboard
2199 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2200 contains upper case chars. Make router use caseful_local_part.
2202 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2203 support when GnuTLS has been built with p11-kit.
2209 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2211 This, or similar/improved, will also be change PP/11 of 4.82.
2217 PP/01 Handle short writes when writing local log-files.
2218 In practice, only affects FreeBSD (8 onwards).
2219 Bugzilla 1053, with thanks to Dmitry Isaikin.
2221 NM/01 Bugzilla 949 - Documentation tweak
2223 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2226 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2228 PP/02 Implemented gsasl authenticator.
2230 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2232 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2233 `pkg-config foo` for cflags/libs.
2235 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2236 with rest of GSASL and with heimdal_gssapi.
2238 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2239 `pkg-config foo` for cflags/libs for the TLS implementation.
2241 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2242 properties get this fed in as external SSF. A number of robustness
2243 and debugging improvements to the cyrus_sasl authenticator.
2245 PP/08 cyrus_sasl server now expands the server_realm option.
2247 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2248 Patch by Jeremy Harris.
2250 PP/10 Added dbmjz lookup type.
2252 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2254 PP/12 MAIL args handles TAB as well as SP, for better interop with
2255 non-compliant senders.
2256 Analysis and variant patch by Todd Lyons.
2258 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2259 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2260 Patch from Dirk Mueller <dmueller@suse.com>
2262 PP/13 tls_peerdn now print-escaped for spool files.
2263 Observed some $tls_peerdn in wild which contained \n, which resulted
2264 in spool file corruption.
2266 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2267 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2268 or write after TLS renegotiation, which otherwise led to messages
2271 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2272 as a tracking header (ie: a signed header comes before the signature).
2273 Patch from Wolfgang Breyha.
2275 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2276 comma-sep list; embedded commas doubled.
2278 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2280 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2282 Report and patch from Dmitry Banschikov.
2284 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2285 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2286 failures. We appear to now support TLS1.1+ with Exim.
2288 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2289 lets Exim select keys and certificates based upon TLS SNI from client.
2290 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2291 before an outbound SMTP session. New log_selector, +tls_sni.
2293 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2294 NULL dereference. Report and patch from Alun Jones.
2296 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2297 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2298 Not seeing resolver debug output on NetBSD, but suspect this is a
2299 resolver implementation change.
2301 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2302 Left warnings. Added "eximon gdb" invocation mode.
2304 PP/21 Defaulting "accept_8bitmime" to true, not false.
2306 PP/22 Added -bw for inetd wait mode support.
2308 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2309 locate the relevant includes and libraries. Made this the default.
2311 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2312 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2314 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2315 This may cause build issues on older platforms.
2317 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2318 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2319 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2320 Added SNI support via GnuTLS too.
2321 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2323 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2325 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2326 Applied second patch from Janne, implementing suggestion to default
2327 multiple-strings-in-record handling to match SPF spec.
2329 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2331 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2332 read-only, out of scope).
2333 Patch from Wolfgang Breyha, report from Stuart Northfield.
2335 PP/29 Fix three issues highlighted by clang analyser static analysis.
2336 Only crash-plausible issue would require the Cambridge-specific
2337 iplookup router and a misconfiguration.
2338 Report from Marcin Mirosław.
2340 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2342 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2343 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2344 As part of this, removing so much warning spew let me fix some minor
2345 real issues in debug logging.
2347 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2348 assignment on my part. Fixed.
2350 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2351 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2352 Janne Snabb (who went above and beyond: thank you).
2354 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2355 string otherwise requires a connection and a bunch more work and it's
2356 relatively easy to get wrong. Should also expose TLS library linkage
2359 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2360 64-bit ${eval} (JH/03).
2362 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2363 GNU libc to support some of the 64-bit stuff, should not lead to
2364 conflicts. Defined before os.h is pulled in, so if a given platform
2365 needs to override this, it can.
2367 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2368 protection layer was required, which is not implemented.
2369 Bugzilla 1254, patch from Wolfgang Breyha.
2371 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2372 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2373 tls_dhparam take prime identifiers. Also unbreak combination of
2374 OpenSSL+DH_params+TLSSNI.
2376 PP/39 Disable SSLv2 by default in OpenSSL support.
2382 PP/01 Solaris build fix for Oracle's LDAP libraries.
2383 Bugzilla 1109, patch from Stephen Usher.
2385 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2387 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2390 TF/02 Fix a couple more cases where we did not log the error message
2391 when unlink() failed. See also change 4.74-TF/03.
2393 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2394 lock up or crash if it happened to be inside a call to libc when it
2395 got a SIGUSR1 from exiwhat.
2397 The SIGUSR1 handler appends the current process status to the process
2398 log which is later printed by exiwhat. It used to use the general
2399 purpose logging code to do this, but several functions it calls are
2400 not safe for signals.
2402 The new output code in the SIGUSR1 handler is specific to the process
2403 log, and simple enough that it's easy to inspect for signal safety.
2404 Removing some special cases also simplifies the general logging code.
2405 Removing the spurious timestamps from the process log simplifies
2408 TF/04 Improved ratelimit ACL condition.
2410 The /noupdate option has been deprecated in favour of /readonly which
2411 has clearer semantics. The /leaky, /strict, and /readonly update modes
2412 are mutually exclusive. The update mode is no longer included in the
2413 database key; it just determines when the database is updated. (This
2414 means that when you upgrade Exim will forget old rate measurements.)
2416 Exim now checks that the per_* options are used with an update mode that
2417 makes sense for the current ACL. For example, when Exim is processing a
2418 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2419 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2420 must specify per_mail/readonly. If you omit the update mode it defaults to
2421 /leaky where that makes sense (as before) or /readonly where required.
2423 The /noupdate option is now undocumented but still supported for
2424 backwards compatibility. It is equivalent to /readonly except that in
2425 ACLs where /readonly is required you may specify /leaky/noupdate or
2426 /strict/noupdate which are treated the same as /readonly.
2428 A useful new feature is the /count= option. This is a generalization
2429 of the per_byte option, so that you can measure the throughput of other
2430 aggregate values. For example, the per_byte option is now equivalent
2431 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2433 The per_rcpt option has been generalized using the /count= mechanism
2434 (though it's more complicated than the per_byte equivalence). When it is
2435 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2436 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2437 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2438 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2439 Note that using per_rcpt with a non-readonly update mode in more than
2440 one ACL will cause the recipients to be double-counted. (The per_mail
2441 and per_byte options don't have this problem.)
2443 The handling of very low rates has changed slightly. If the computed rate
2444 is less than the event's count (usually one) then this event is the first
2445 after a long gap. In this case the rate is set to the same as this event's
2446 count, so that the first message of a spam run is counted properly.
2448 The major new feature is a mechanism for counting the rate of unique
2449 events. The new per_addr option counts the number of different
2450 recipients that someone has sent messages to in the last time period. It
2451 behaves like per_rcpt if all the recipient addresses are different, but
2452 duplicate recipient addresses do not increase the measured rate. Like
2453 the /count= option this is a general mechanism, so the per_addr option
2454 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2455 example, measure the rate that a client uses different sender addresses
2456 with the options per_mail/unique=$sender_address. There are further
2457 details in the main documentation.
2459 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2461 TF/06 Removed a few PCRE remnants.
2463 TF/07 Automatically extract Exim's version number from tags in the git
2464 repository when doing development or release builds.
2466 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2467 Bugzilla 879. Patch from Paul Fisher.
2469 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2470 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2473 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2475 PP/05 Variable $av_failed, true if the AV scanner deferred.
2476 Bugzilla 1078. Patch from John Horne.
2478 PP/06 Stop make process more reliably on build failure.
2479 Bugzilla 1087. Patch from Heiko Schlittermann.
2481 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2482 Bugzilla 1089. Patch from Heiko Schlittermann.
2484 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2485 Bugzilla 1131. Patch from Holger Weiß.
2487 PP/09 Handle IPv6 addresses with SPF.
2488 Bugzilla 860. Patch from Wolfgang Breyha.
2490 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2492 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2495 PP/11 match_* no longer expand right-hand-side by default.
2496 New compile-time build option, EXPAND_LISTMATCH_RHS.
2497 New expansion conditions, "inlist", "inlisti".
2499 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2501 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2503 PP/14 fix log_write() format string regression from TF/03.
2504 Bugzilla 1152. Patch from Dmitry Isaikin.
2510 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2512 PP/02 Harmonised TLS library version reporting; only show if debugging.
2513 Layout now matches that introduced for other libraries in 4.74 PP/03.
2515 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2517 PP/04 New "dns_use_edns0" global option.
2519 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2522 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2523 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2525 TK/01 Updated PolarSSL code to 0.14.2.
2526 Bugzilla 1097. Patch from Andreas Metzler.
2528 PP/07 Catch divide-by-zero in ${eval:...}.
2529 Fixes bugzilla 1102.
2531 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2534 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2535 format-string attack -- SECURITY: remote arbitrary code execution.
2537 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2538 time unintentionally subject to list matching rules, letting the header
2539 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2540 arbitrary string expansion). This allowed for information disclosure.
2542 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2543 INT_MIN/-1 -- value coerced to INT_MAX.
2549 NM/01 Workaround for PCRE version dependency in version reporting
2552 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2553 This fixes portability to compilers other than gcc, notably
2554 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2556 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2557 makefiles for portability to HP-UX and POSIX correctness.
2559 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2560 Also via indented variable definition in the Makefile.
2561 (Debugging by Oliver Heesakkers).
2563 PP/02 Restore caching of spamd results with expanded spamd_address.
2564 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2566 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2567 Improves build reliability. Fix from: Frank Elsner
2569 NM/02 Fix wide character breakage in the rfc2047 coding
2570 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2572 NM/03 Allow underscore in dnslist lookups
2573 Fixes bug 1026. Patch from Graeme Fowler
2575 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2576 Code patches from Adam Ciarcinski of NetBSD.
2578 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2581 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2582 is logged, to avoid truncation. Patch from John Horne.
2584 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2585 Patch from Jakob Hirsch.
2587 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2588 SQL string expansion failure details.
2589 Patch from Andrey Oktyabrski.
2591 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2592 Patch from Simon Arlott.
2594 PP/09 New lookups functionality failed to compile on old gcc which rejects
2595 extern declarations in function scope.
2596 Patch from Oliver Fleischmann
2598 PP/10 Use sig_atomic_t for flags set from signal handlers.
2599 Check getgroups() return and improve debugging.
2600 Fixed developed for diagnosis in bug 927 (which turned out to be
2603 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2604 Patch from Mark Zealey.
2606 PP/12 Bugzilla 1056: Improved spamd server selection.
2607 Patch from Mark Zealey.
2609 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2610 Based on patch from Heiko Schlittermann.
2612 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2613 Patch from Uwe Doering, sign-off by Michael Haardt.
2615 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2616 variable declaration deep within a block. Bug and patch from
2619 PP/15 lookups-Makefile IRIX compatibility coercion.
2621 PP/16 Make DISABLE_DKIM build knob functional.
2623 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2624 Patch by Simon Arlott
2626 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2627 variable argument macros. Our copy now differs from upstream.
2633 TF/01 Failure to get a lock on a hints database can have serious
2634 consequences so log it to the panic log.
2636 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2637 controlled using the smtp_confirmation log selector.
2639 TF/03 Include the error message when we fail to unlink a spool file.
2641 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2642 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2643 for maintaining out-of-tree patches for some time.
2645 PP/01 Bugzilla 139: Documentation and portability issues.
2646 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2647 Handle per-OS dynamic-module compilation flags.
2649 PP/02 Let /dev/null have normal permissions.
2650 The 4.73 fixes were a little too stringent and complained about the
2651 permissions on /dev/null. Exempt it from some checks.
2652 Reported by Andreas M. Kirchwitz.
2654 PP/03 Report version information for many libraries, including
2655 Exim version information for dynamically loaded libraries. Created
2656 version.h, now support a version extension string for distributors
2657 who patch heavily. Dynamic module ABI change.
2659 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2660 privilege escalation vulnerability whereby the Exim run-time user
2661 can cause root to append content of the attacker's choosing to
2664 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2667 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2668 If dropping privileges for untrusted macros, we disabled normal logging
2669 on the basis that it would fail; for the Exim run-time user, this is not
2670 the case, and it resulted in successful deliveries going unlogged.
2671 Fixed. Reported by Andreas Metzler.
2677 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2678 only prepend for the Resent-* case. Fixes regression introduced in
2679 Exim 4.70 by NM/22 for Bugzilla 607.
2681 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2682 increasing numbers of administrators be bitten by this.
2684 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2686 PP/03 Bugzilla 994: added openssl_options main configuration option.
2688 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2690 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2692 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2694 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2695 without a peer certificate, leading to a segfault because of an
2696 assumption that peers always have certificates. Be a little more
2697 paranoid. Problem reported by Martin Tscholak.
2699 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2700 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2701 NB: ClamAV planning to remove STREAM in "middle of 2010".
2702 CL also introduces -bmalware, various -d+acl logging additions and
2703 more caution in buffer sizes.
2705 PP/09 Implemented reverse_ip expansion operator.
2707 PP/10 Bugzilla 937: provide a "debug" ACL control.
2709 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2711 PP/12 Bugzilla 973: Implement --version.
2713 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2715 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2717 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2719 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2720 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2721 ignore trailing whitespace.
2723 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2725 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2728 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2729 Notification from Dr Andrew Aitchison.
2731 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2732 ExtendedDetectionInfo response format.
2733 Notification from John Horne.
2735 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2738 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2739 XSL and documented dependency on system catalogs, with examples of how
2742 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2745 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2746 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2747 configuration file which is writeable by the Exim user or group.
2749 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2750 of configuration files to cover files specified with the -C option if
2751 they are going to be used with root privileges, not just the default
2754 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2755 option (effectively making it always true).
2757 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2758 files to be used while preserving root privileges.
2760 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2761 that rogue child processes cannot use them.
2763 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2764 run-time user, instead of root.
2766 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2767 Exim run-time user without dropping privileges.
2769 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2770 result string, instead of calling string_vformat() twice with the same
2773 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2774 for other users. Others should always drop root privileges if they use
2775 -C on the command line, even for a whitelisted configure file.
2777 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2779 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2785 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2786 $data_path, and $header_path variables; fixed documentation bugs and
2789 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2790 exipick to access non-standard spools, including the "frozen" queue
2793 NM/01 Bugzilla 965: Support mysql stored procedures.
2794 Patch from Alain Williams
2796 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2798 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2799 Patch from Andreas Metzler
2801 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2802 Patch from Kirill Miazine
2804 NM/05 Bugzilla 671: Added umask to procmail example.
2806 JJ/03 installed exipick 20100323.0, fixing doc bug
2808 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2809 directory. Notification and patch from Dan Rosenberg.
2811 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2813 TK/02 Improve log output when DKIM signing operation fails.
2815 MH/01 Treat the transport option dkim_domain as a colon separated
2816 list, not as a single string, and sign the message with each element,
2817 omitting multiple occurences of the same signer.
2819 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2820 Bugzilla 985, 986. Patch by Simon Arlott
2822 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2823 Patch by Simon Arlott
2825 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2826 MBX locking. Notification from Dan Rosenberg.
2832 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2834 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2836 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2838 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2840 NM/04 Bugzilla 915: Flag broken perl installation during build.
2846 TK/01 Added patch by Johannes Berg that expands the main option
2847 "spamd_address" if it starts with a dollar sign.
2849 TK/02 Write list of recipients to X-Envelope-Sender header when building
2850 the mbox-format spool file for content scanning (suggested by Jakob
2853 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2854 (http://www.dcc-servers.net/) support via dccifd. Activated by
2855 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2857 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2858 by Mark Daniel Reidel <mr@df.eu>.
2860 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2861 When building exim an external PCRE library is now needed -
2862 PCRE is a system library on the majority of modern systems.
2863 See entry on PCRE_LIBS in EDITME file.
2865 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2866 conversation. Added nologin parameter to request.
2867 Patch contributed by Kirill Miazine.
2869 TF/01 Do not log submission mode rewrites if they do not change the address.
2871 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2873 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2874 log files in place. Contributed by Roberto Lima.
2876 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2878 TF/03 Bugzilla 615: When checking the local_parts router precondition
2879 after a local_part_suffix or local_part_prefix option, Exim now
2880 does not use the address's named list lookup cache, since this
2881 contains cached lookups for the whole local part.
2883 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2884 Robert Millan. Documentation is in experimental-spec.txt.
2886 TF/04 Bugzilla 668: Fix parallel build (make -j).
2888 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2890 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2891 Patch provided by Jan Srzednicki.
2893 TF/05 Leading white space used to be stripped from $spam_report which
2894 wrecked the formatting. Now it is preserved.
2896 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2897 that they are available at delivery time.
2899 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2901 TF/08 TLS error reporting now respects the incoming_interface and
2902 incoming_port log selectors.
2904 TF/09 Produce a more useful error message if an SMTP transport's hosts
2905 setting expands to an empty string.
2907 NM/06 Bugzilla 744: EXPN did not work under TLS.
2908 Patch provided by Phil Pennock.
2910 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2911 Patch provided by Richard Godbee.
2913 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2914 acl_smtp_notquit, added index entry.
2916 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2917 Patch provided by Eugene Bujak.
2919 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2920 accept(). Patch provided by Maxim Dounin.
2922 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2923 Patch provided by Phil Pennock.
2925 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2927 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2928 Patch provided by Brad "anomie" Jorsch.
2930 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2931 Patch provided by Dean Brooks.
2933 TK/05 Add native DKIM support (does not depend on external libraries).
2935 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2936 Patch provided by Graeme Fowler.
2938 NM/16 Bugzilla 851: Documentation example syntax fix.
2940 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2942 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2945 NM/19 Bugzilla 745: TLS version reporting.
2946 Patch provided by Phil Pennock.
2948 NM/20 Bugzilla 167: bool: condition support.
2949 Patch provided by Phil Pennock.
2951 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2952 clients. Patch provided by Phil Pennock.
2954 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2955 Patch provided by Brad "anomie" Jorsch.
2957 NM/23 Bugzilla 687: Fix misparses in eximstats.
2958 Patch provided by Heiko Schlittermann.
2960 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2961 Patch provided by Heiko Schlittermann.
2963 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2964 plus update to original patch.
2966 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2968 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2969 Patch provided by David Brownlee.
2971 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2973 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2975 NM/30 Bugzilla 888: TLS documentation bugfixes.
2977 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2979 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2980 Unlike the original bugzilla I have changed all shell scripts in src tree.
2982 NM/33 Bugzilla 898: Transport filter timeout fix.
2983 Patch by Todd Rinaldo.
2985 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2986 Patch by Serge Demonchaux.
2988 NM/35 Bugzilla 39: Base64 decode bug fixes.
2989 Patch by Jakob Hirsch.
2991 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2993 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2995 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2997 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3003 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3004 ALT-N's libdkim that I have put here:
3005 http://duncanthrax.net/exim-experimental/
3007 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3008 were called 'true' and it seems that C99 defines that as a reserved
3009 keyword to be used with 'bool' variable types. That means you could
3010 not include C99-style headers which use bools without triggering
3011 build errors in sieve.c.
3013 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3014 as mailq or other aliases. Changed the --help handling significantly
3015 to do whats expected. exim_usage() emits usage/help information.
3017 SC/01 Added the -bylocaldomain option to eximstats.
3019 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3021 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3023 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3029 PH/01 Another patch from the Sieve maintainer.
3031 PH/02 When an IPv6 address is converted to a string for single-key lookup
3032 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3033 dots are used instead of colons so that keys in lsearch files need not
3034 contain colons. This was done some time before quoting was made available
3035 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3036 (notated using the quote facility) so as to distinguish them from IPv4
3037 keys. This meant that lookups for IP addresses in host lists did not work
3038 for iplsearch lookups.
3040 This has been fixed by arranging for IPv6 addresses to be expressed with
3041 colons if the lookup type is iplsearch. This is not incompatible, because
3042 previously such lookups could never work.
3044 The situation is now rather anomalous, since one *can* have colons in
3045 ordinary lsearch keys. However, making the change in all cases is
3046 incompatible and would probably break a number of configurations.
3048 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3051 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3052 conversion specification without a maximum field width, thereby enabling
3053 a rogue spamd server to cause a buffer overflow. While nobody in their
3054 right mind would setup Exim to query an untrusted spamd server, an
3055 attacker that gains access to a server running spamd could potentially
3056 exploit this vulnerability to run arbitrary code as the Exim user.
3058 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3059 $primary_hostname instead of what libspf2 thinks the hosts name is.
3061 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3062 a directory entry by the name of the lookup key. Previously, if a
3063 symlink pointed to a non-existing file or a file in a directory that
3064 Exim lacked permissions to read, a lookup for a key matching that
3065 symlink would fail. Now it is enough that a matching directory entry
3066 exists, symlink or not. (Bugzilla 503.)
3068 PH/03 The body_linecount and body_zerocount variables are now exported in the
3071 PH/04 Added the $dnslist_matched variable.
3073 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3074 This means they are set thereafter only if the connection becomes
3077 PH/06 Added the client_condition to authenticators so that some can be skipped
3078 by clients under certain conditions.
3080 PH/07 The error message for a badly-placed control=no_multiline_responses left
3081 "_responses" off the end of the name.
3083 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3085 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3086 (without spaces) instead of just copying the configuration text.
3088 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3090 PH/11 Added $max_received_linelength.
3092 PH/12 Added +ignore_defer and +include_defer to host lists.
3094 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3095 way in which PCRE > 7.0 is built.
3097 PH/14 Implemented queue_only_load_latch.
3099 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3100 MAIL command. The effect was to mangle the value on 64-bit systems.
3102 PH/16 Another patch from the Sieve maintainer.
3104 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3106 PH/18 If a system quota error occurred while trying to create the file for
3107 a maildir delivery, the message "Mailbox is full" was not appended to the
3108 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3109 only to a quota excession during the actual writing of the file.
3111 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3112 characters?) which causes problems in log lines. The DN values are now
3113 passed through string_printing() before being added to log lines.
3115 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3116 and InterBase are left for another time.)
3118 PH/21 Added message_body_newlines option.
3120 PH/22 Guard against possible overflow in moan_check_errorcopy().
3122 PH/23 POSIX allows open() to be a macro; guard against that.
3124 PH/24 If the recipient of an error message contained an @ in the local part
3125 (suitably quoted, of course), incorrect values were put in $domain and
3126 $local_part during the evaluation of errors_copy.
3132 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3133 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3136 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3137 issue a MAIL command.
3139 PH/02 In an ACL statement such as
3141 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3143 if a client was not listed at all, or was listed with a value other than
3144 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3145 the condition was not true (as it should be), so access was not denied.
3146 The bug was that the ! inversion was incorrectly passed on to the second
3147 item. This has been fixed.
3149 PH/03 Added additional dnslists conditions == and =& which are different from
3150 = and & when the dns lookup returns more than one IP address.
3152 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3153 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3155 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3156 FSYNC, which compiles an option called disable_fsync that allows for
3157 bypassing fsync(). The documentation is heavily laced with warnings.
3159 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3161 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3162 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3163 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3164 including adding "make clean"; (3) Added -fPIC when compiling the test
3165 dynamically loaded module, to get rid of a warning.
3167 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3168 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3169 = 0s. The bug is otherwise harmless.
3171 PH/07 There was a bug in the dovecot authenticator such that the value of
3172 $auth1 could be overwritten, and so not correctly preserved, after a
3173 successful authentication. This usually meant that the value preserved by
3174 the server_setid option was incorrect.
3176 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3178 PH/09 Installed PCRE release 7.0.
3180 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3181 run for batched SMTP input. It is now run at the start of every message
3182 in the batch. While fixing this I discovered that the process information
3183 (output by running exiwhat) was not always getting set for -bs and -bS
3184 input. This is fixed, and it now also says "batched" for BSMTP.
3186 PH/11 Added control=no_pipelining.
3188 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3189 patch, slightly modified), and move the expansion of helo_data till after
3190 the connection is made in the smtp transport (so it can use these
3193 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3195 PH/14 Added log_selector = +pid.
3197 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3199 PH/16 Add ${if forany and ${if forall.
3201 PH/17 Added dsn_from option to vary the From: line in DSNs.
3203 PH/18 Flush SMTP output before performing a callout, unless control =
3204 no_callout_flush is set.
3206 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3207 was true (the default) a successful delivery failed to delete the retry
3208 item, thus causing premature timeout of the address. The bug is now
3211 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3213 PH/21 Long custom messages for fakedefer and fakereject are now split up
3214 into multiline responses in the same way that messages for "deny" and
3215 other ACL rejections are.
3217 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3218 with slight modification.
3220 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3221 draft, changing the syntax and factoring some duplicate code".
3223 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3224 for deliveries of the second and subsequent messages over the same SMTP
3227 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3228 ${reduce, with only minor "tidies".
3230 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3232 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3233 expansion side effects.
3235 PH/27 When a message times out after an over-quota error from an Exim-imposed
3236 quota, the bounce message says "mailbox is full". This message was not
3237 being given when it was a system quota that was exceeded. It now should
3240 MH/03 Made $recipients available in local_scan(). local_scan() already has
3241 better access to the recipient list through recipients_list[], but
3242 $recipients can be useful in postmaster-provided expansion strings.
3244 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3245 in the case of a MAIL command with additional options following the
3246 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3247 were accidentally chopped off.
3249 PH/29 SMTP synchronization checks are implemented when a command is read -
3250 there is a check that no more input is waiting when there shouldn't be
3251 any. However, for some commands, a delay in an ACL can mean that it is
3252 some time before the response is written. In this time, more input might
3253 arrive, invalidly. So now there are extra checks after an ACL has run for
3254 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3255 pipelining has not been advertised.
3257 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3259 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3260 returned in the SMTP response when smtp_return_error_details was false.
3261 This has been fixed.
3263 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3264 instead of the C I/O that was originally supplied, because problems were
3265 reported on Solaris.
3267 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3268 Exim which did not show up earlier: it was assuming that a call to
3269 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3270 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3271 was a macro that became an assignment, so it seemed to work. This has
3272 changed to a proper function call with a void return, hence the compile
3273 error. Exim's code has been fixed.
3275 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3278 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3280 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3282 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3283 because it turns out to be too big or there is a timeout) there is no
3284 "Completed" line in the log. When some messages of this type were
3285 selected by exigrep, they were listed as "not completed". Others were
3286 picked up by some special patterns. I have improved the selection
3287 criteria to be more general.
3289 PH/38 The host_find_failed option in the manualroute router can now be set
3290 to "ignore", to completely ignore a host whose IP address cannot be
3291 found. If all hosts are ignored, the behaviour is controlled by the new
3292 host_all_ignored option.
3294 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3295 homing or because of multiple MX records with /mx) generated more than
3296 one IP address, and the following item turned out to be the local host,
3297 all the secondary addresses of the first item were incorrectly removed
3298 from the list, along with the local host and any following hosts (which
3299 is what is supposed to happen).
3301 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3302 whoever called Exim into the -H file. In the case of the daemon it was
3303 behaving confusingly. When first started, it used values for whoever
3304 started the daemon, but after a SIGHUP it used the Exim user (because it
3305 calls itself on a restart). I have changed the code so that it now always
3308 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3309 message are rejected with the same error (e.g. no authentication or bad
3310 sender address), and a DATA command is nevertheless sent (as can happen
3311 with PIPELINING or a stupid MUA), the error message that was given to the
3312 RCPT commands is included in the rejection of the DATA command. This is
3313 intended to be helpful for MUAs that show only the final error to their
3316 PH/42 Another patch from the Sieve maintainer.
3318 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3319 Eximstats - Fixed some broken HTML links and added missing column headers
3321 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3322 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3324 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3326 PH/43 Yet another patch from the Sieve maintainer.
3328 PH/44 I found a way to check for a TCP/IP connection going away before sending
3329 the response to the final '.' that terminates a message, but only in the
3330 case where the client has not sent further data following the '.'
3331 (unfortunately, this is allowed). However, in many cases there won't be
3332 any further data because there won't be any more messages to send. A call
3333 to select() can be used: if it shows that the input is "ready", there is
3334 either input waiting, or the socket has been closed. An attempt to read
3335 the next input character can distinguish the two cases. Previously, Exim
3336 would have sent an OK response which the client would never have see.
3337 This could lead to message repetition. This fix should cure that, at
3338 least in a lot of common cases.
3340 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3341 advertised in response to EHLO.
3347 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3348 fixed by 4.65/MH/01 (is this a record?) are fixed:
3350 (i) An empty string was always treated as zero by the numeric comparison
3351 operators. This behaviour has been restored.
3353 (ii) It is documented that the numeric comparison operators always treat
3354 their arguments as decimal numbers. This was broken in that numbers
3355 starting with 0 were being interpreted as octal.
3357 While fixing these problems I realized that there was another issue that
3358 hadn't been noticed. Values of message_size_limit (both the global option
3359 and the transport option) were treated as octal if they started with 0.
3360 The documentation was vague. These values are now always treated as
3361 decimal, and I will make that clear in the documentation.
3367 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3368 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3371 MH/01 Don't check that the operands of numeric comparison operators are
3372 integers when their expansion is in "skipping" mode (fixes bug
3373 introduced by 4.64-PH/07).
3375 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3376 child addresses, Exim now panics and dies. Previously, because the count
3377 is held in a short int, deliveries were likely to be lost. As such a
3378 large number of recipients for a single message is ridiculous
3379 (performance will be very, very poor), I have chosen to impose a limit
3380 rather than extend the field.
3386 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3387 leftover -K file (the existence of which was triggered by #402).
3388 While we were at it, introduced process PID as part of the -K
3389 filename. This should rule out race conditions when creating
3392 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3393 processing considerably. Previous code took too long for large mails,
3394 triggering a timeout which in turn triggers #401.
3396 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3397 in the DK code in transports.c. sendfile() is not really portable,
3398 hence the _LINUX specificness.
3400 TF/01 In the add_headers option to the mail command in an Exim filter,
3401 there was a bug that Exim would claim a syntax error in any
3402 header after the first one which had an odd number of characters
3405 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3406 callout verification, Exim cached a "reject" for the entire domain. This
3407 is correct for most verifications, but it is not correct for a recipient
3408 verification with use_sender or use_postmaster set, because in that case
3409 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3410 case of MAIL FROM:<> rejection from other early rejections (e.g.
3411 rejection of HELO). When verifying a recipient using a non-null MAIL
3412 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3413 Whatever the result of the callout, the value of the domain cache is
3414 left unchanged (for any other kind of callout, getting as far as trying
3415 RCPT means that the domain itself is ok).
3417 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3420 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3421 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3422 session, the daemon ignores ECONNECT errors and logs others; it now
3423 ignores EPIPE as well.
3425 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3426 (quoted-printable decoding).
3428 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3429 later the small subsequent patch to fix an introduced bug.
3431 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3433 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3435 PH/08 An error is now given if message_size_limit is specified negative.
3437 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3438 to be given (somewhat) arbitrary names.
3440 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3443 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3444 miscellaneous code fixes
3446 PH/10 Added the log_reject_target ACL modifier to specify where to log
3449 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3450 hostname. This is wrong, because it relates to the incoming message (and
3451 probably the interface on which it is arriving) and not to the outgoing
3452 callout (which could be using a different interface). This has been
3453 changed to use the value of the helo_data option from the smtp transport
3454 instead - this is what is used when a message is actually being sent. If
3455 there is no remote transport (possible with a router that sets up host
3456 addresses), $smtp_active_hostname is used.
3458 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3459 tweaks were necessary in order to get it to work (see also 21 below):
3460 (a) The code assumed that strncpy() returns a negative number on buffer
3461 overflow, which isn't the case. Replaced with Exim's string_format()
3463 (b) There were several signed/unsigned issues. I just did the minimum
3464 hacking in of casts. There is scope for a larger refactoring.
3465 (c) The code used strcasecmp() which is not a standard C function.
3466 Replaced with Exim's strcmpic() function.
3467 (d) The code set only $1; it now sets $auth1 as well.
3468 (e) A simple test gave the error "authentication client didn't specify
3469 service in request". It would seem that Dovecot has changed its
3470 interface. Fortunately there's a specification; I followed it and
3471 changed what the client sends and it appears to be working now.
3473 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3476 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3477 address A is aliased to B and C, where B exists and C does not. Without
3478 -v the output is "A verified" because verification stops after a
3479 successful redirection if more than one address is generated. However,
3480 with -v the child addresses are also verified. Exim was outputting "A
3481 failed to verify" and then showing the successful verification for C,
3482 with its parentage. It now outputs "B failed to verify", showing B's
3483 parentage before showing the successful verification of C.
3485 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3486 look up a TXT record in a specific list after matching in a combined
3489 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3490 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3491 they consult the DNS. I had assumed they would set it the way they
3492 wanted; and indeed my experiments on Linux seem to show that in some
3493 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3494 To be on the safe side, however, I have now made the interface to
3495 host_find_byname() similar to host_find_bydns(), with an argument
3496 containing the DNS resolver options. The host_find_byname() function now
3497 sets these options at its start, just as host_find_bydns() does. The smtp
3498 transport options dns_qualify_single and dns_search_parents are passed to
3499 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3500 of host_find_byname() use the default settings of RES_DEFNAMES
3501 (qualify_single) but not RES_DNSRCH (search_parents).
3503 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3504 spool_read_header() do less string testing, by means of a preliminary
3505 switch on the second character of optional "-foo" lines. (This is
3506 overdue, caused by the large number of possibilities that now exist.
3507 Originally there were few.) While I was there, I also converted the
3508 str(n)cmp tests so they don't re-test the leading "-" and the first
3509 character, in the hope this might squeeze out yet more improvement.
3511 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3512 flag allowing group syntax was set by the header_syntax check but not
3513 turned off, possible causing trouble later; (2) The flag was not being
3514 set at all for the header_verify test, causing "group"-style headers to
3515 be rejected. I have now set it in this case, and also caused header_
3516 verify to ignore an empty address taken from a group. While doing this, I
3517 came across some other cases where the code for allowing group syntax
3518 while scanning a header line wasn't quite right (mostly, not resetting
3519 the flag correctly in the right place). These bugs could have caused
3520 trouble for malformed header lines. I hope it is now all correct.
3522 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3523 with the "reply" argument non-NULL. The code, however (which originally
3524 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3525 but it didn't always do it. This confused somebody who was copying the
3526 code for some other use. I have removed all the tests.
3528 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3529 feature that was used to support insecure browsers during the U.S. crypto
3530 embargo. It requires special client support, and Exim is probably the
3531 only MTA that supported it -- and would never use it because real RSA is
3532 always available. This code has been removed, because it had the bad
3533 effect of slowing Exim down by computing (never used) parameters for the
3534 RSA_EXPORT functionality.
3536 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3537 authenticator to fail if there's a tab character in the incoming data
3538 (there should never be unless someone is messing about, as it's supposed
3539 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3540 if the connection is using TLS or if the remote IP is the same as the
3541 local IP, and the "valid-client-cert option" if a client certificate has
3544 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3545 authenticators. This can be used for authorization after authentication
3546 succeeds. (In the case of plaintext, it servers for both authentication
3549 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3550 if any retry times were supplied.
3552 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3553 connection, where there is no client IP address to check. In this
3554 situation, the verify now always succeeds.
3556 PH/25 Applied John Jetmore's -Mset patch.
3558 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3560 PH/27 In a string expansion for a processed (not raw) header when multiple
3561 headers of the same name were present, leading whitespace was being
3562 removed from all of them, but trailing whitespace was being removed only
3563 from the last one. Now trailing whitespace is removed from each header
3564 before concatenation. Completely empty headers in a concatenation (as
3565 before) are ignored.
3567 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3568 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3570 PH/29 [Removed. This was a change that I later backed out, and forgot to
3571 correct the ChangeLog entry (that I had efficiently created) before
3572 committing the later change.]
3574 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3575 address errors (4xx response to RCPT) over the same connection as other
3576 messages routed to the same hosts. Such deliveries are always "forced",
3577 so retry times are not inspected. This resulted in far too many retries
3578 for the affected addresses. The effect occurred only when there were more
3579 hosts than the hosts_max_try setting in the smtp transport when it had
3580 the 4xx errors. Those hosts that it had tried were not added to the list
3581 of hosts for which the message was waiting, so if all were tried, there
3582 was no problem. Two fixes have been applied:
3584 (i) If there are any address or message errors in an SMTP delivery, none
3585 of the hosts (tried or untried) are now added to the list of hosts
3586 for which the message is waiting, so the message should not be a
3587 candidate for sending over the same connection that was used for a
3588 successful delivery of some other message. This seems entirely
3589 reasonable: after all the message is NOT "waiting for some host".
3590 This is so "obvious" that I'm not sure why it wasn't done
3591 previously. Hope I haven't missed anything, but it can't do any
3592 harm, as the worst effect is to miss an optimization.
3594 (ii) If, despite (i), such a delivery is accidentally attempted, the
3595 routing retry time is respected, so at least it doesn't keep
3596 hammering the server.
3598 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3599 in ${readsocket because some servers need this prod.
3601 PH/32 Added some extra debug output when updating a wait-xxx database.
3603 PH/33 The hint "could be header name not terminated by colon", which has been
3604 given for certain expansion errors for a long time, was not being given
3605 for the ${if def:h_colon_omitted{... case.
3607 PH/34 The spec says: "With one important exception, whenever a domain list is
3608 being scanned, $domain contains the subject domain." There was at least
3609 one case where this was not true.
3611 PH/35 The error "getsockname() failed: connection reset by peer" was being
3612 written to the panic log as well as the main log, but it isn't really
3613 panic-worthy as it just means the connection died rather early on. I have
3614 removed the panic log writing for the ECONNRESET error when getsockname()
3617 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3618 runs only) independently of the message's sender address. This meant
3619 that, if the 4xx error was in fact related to the sender, a different
3620 message to the same recipient with a different sender could confuse
3621 things. In particular, this can happen when sending to a greylisting
3622 server, but other circumstances could also provoke similar problems.
3623 I have changed the default so that the retry time for these errors is now
3624 based a combination of the sender and recipient addresses. This change
3625 can be overridden by setting address_retry_include_sender=false in the
3628 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3629 remote server are returned as part of bounce messages. This was not
3630 happening for LMTP over a pipe (the lmtp transport), but now it is the
3631 same for both kinds of LMTP.
3633 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3634 in header lines that were in fact CNAMEs. This is no longer the case.
3636 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3637 and queue runs started by the daemon processed all messages. This has
3638 been fixed so that -R and -S can now usefully be given with -q<time>.
3640 PH/40 Import PCRE release 6.7 (fixes some bugs).
3642 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3644 PH/42 Give an error if -q is specified more than once.
3646 PH/43 Renamed the variables $interface_address and $interface_port as
3647 $received_ip_address and $received_port, to make it clear that these
3648 values apply to message reception, and not to the outgoing interface when
3649 a message is delivered. (The old names remain recognized, of course.)
3651 PH/44 There was no timeout on the connect() call when using a Unix domain
3652 socket in the ${readsocket expansion. There now is.
3654 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3655 be meaningful with "accept".
3657 SC/01 Eximstats V1.43
3658 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3660 SC/02 Eximstats V1.44
3661 Use a glob alias rather than an array ref in the generated
3662 parser. This improves both readability and performance.
3664 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3665 Collect SpamAssassin and rejection statistics.
3666 Don't display local sender or destination tables unless
3667 there is data to show.
3668 Added average volumes into the top table text output.
3670 SC/04 Eximstats V1.46
3671 Collect data on the number of addresses (recipients)
3672 as well as the number of messages.
3674 SC/05 Eximstats V1.47
3675 Added 'Message too big' to the list of mail rejection
3676 reasons (thanks to Marco Gaiarin).
3678 SC/06 Eximstats V1.48
3679 Mainlog lines which have GMT offsets and are too short to
3680 have a flag are now skipped.
3682 SC/07 Eximstats V1.49 (Alain Williams)
3683 Added the -emptyok flag.
3685 SC/08 Eximstats V1.50
3686 Fixes for obtaining the IP address from reject messages.
3688 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3689 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3690 whitespace changes from 4.64-PH/27
3692 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3695 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3696 are found, allow negative numbers in numeric criteria)
3698 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3700 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3701 to match changes made in 4.64-PH/43
3703 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3705 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3706 "domain" is actually an IP address, and force a failure. This locks out
3707 those revolvers/nameservers that support "A-for-A" lookups, in
3708 contravention of the specifications.
3710 PH/48 When a host name was looked up from an IP address, and the subsequent
3711 forward lookup of the name timed out, the host name was left in
3712 $sender_host_name, contrary to the specification.
3714 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3715 restricted to single-key lookups, Exim was not diagnosing an error if
3716 * or *@ was used with a query-style lookup.
3718 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3720 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3721 long ago, but noone interested enough thought of it. Let's just say that
3722 the "1.1" means that there are some new functions that weren't there at
3723 some point in the past.
3725 PH/51 Error processing for expansion failure of helo_data from an smtp
3726 transport during callout processing was broken.
3728 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3729 tested/used via the -bh/-bhc/-bs options.
3731 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3732 bug, fixed in subsequent PCRE releases).
3734 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3735 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3737 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3743 SC/01 Use a glob alias rather than an array ref in eximstats generated
3744 parser. This improves both readability and performance.
3746 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3747 Don't display local sender or destination tables in eximstats unless
3748 there is data to show.
3749 Added average volumes into the eximstats top table text output.
3751 SC/03 Collect data on the number of addresses (recipients) as well
3752 as the number of messages in eximstats.
3754 TF/01 Correct an error in the documentation for the redirect router. Exim
3755 does (usually) call initgroups() when daemonizing.
3757 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3758 with consistent privilege compared to when running as a daemon.
3760 TF/03 Note in the spec that $authenticated_id is not set for local
3761 submissions from trusted users.
3763 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3764 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3766 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3767 by adding some example configuration directives to the default
3768 configuration file. A little bit of work is required to uncomment the
3769 directives and define how usernames and passwords are checked, but
3770 there is now a framework to start from.
3772 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3773 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3774 without this. I don't know how relevant this is to other LDAP libraries.
3776 PH/02 Add the verb name to the "unknown ACL verb" error.
3778 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3780 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3782 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3783 directory not expanded when it should be if an expanded home directory
3784 was set for the address (which is overridden by the transport).
3786 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3789 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3790 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3791 because it is too late at that time, and has no effect.
3793 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3794 security issue with \' (bugzilla #107). I could not use the
3795 PQescapeStringConn() function, because it needs a PGconn value as one of
3798 PH/08 When testing addresses using -bt, indicate those final addresses that
3799 are duplicates that would not cause an additional delivery. At least one
3800 person was confused, thinking that -bt output corresponded to deliveries.
3801 (Suppressing duplicates isn't a good idea as you lose the information
3802 about possibly different redirections that led to the duplicates.)
3804 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3805 systems where poll() doesn't work, in particular OS X.
3807 PH/10 Added more information to debugging output for retry time not reached.
3809 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3810 operations in malware.c.
3812 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3815 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3816 syslog_duplication set false, log lines that would normally be written
3817 both the the main log and to the reject log were not written to syslog at
3820 PH/14 In the default configuration, change the use of "message" in ACL warn
3821 statements to "add_header".
3823 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3824 not followed by a command (e.g. "seen endif").
3826 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3827 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3830 PH/17 Added extra conditions to the default value of delay_warning_condition
3834 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3835 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3836 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3839 The Auto-Submitted: and various List- headers are standardised, whereas I
3840 don't think Precedence: ever was.
3842 PH/18 Refactored debugging code in route_finduser() to show more information,
3843 in particular, the error code if getpwnam() issues one.
3845 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3846 This is apparently needed in addition to the PH/07 change above to avoid
3847 any possible encoding problems.
3849 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3850 but not after initializing Perl.
3852 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3853 output them only if debugging. By default they are written stderr,
3854 apparently, which is not desirable.
3856 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3859 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3862 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3864 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3865 authenticated or an ident call has been made. Suppress the default
3866 values for $authenticated_id and $authenticated_sender (but permit -oMai
3867 and -oMas) when testing with -bh.
3869 PH/24 Re-jigged the order of the tests in the default configuration so that the
3870 tests for valid domains and recipients precede the DNS black list and CSA
3871 tests, on the grounds that those ones are more expensive.
3873 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3874 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3875 This bug exists in every version of Exim that I still have, right back to
3878 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3879 However, an attempt to turn on case-sensitivity in a regex key by
3880 including (?-i) didn't work because the subject string was already
3881 lowercased, and the effects were non-intuitive. It turns out that a
3882 one-line patch can be used to allow (?-i) to work as expected.
3888 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3889 other effects) broke the use of negated acl sub-conditions.
3891 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3894 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3895 "Deny" causes Exim to reject the incoming connection with a 554 error.
3896 Unfortunately, if there is a major crisis, such as a disk failure,
3897 tcp-wrappers gives "deny", whereas what one would like would be some
3898 kind of temporary error. A kludge has been added to help with this.
3899 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3900 554 error is used if errno is still zero or contains ENOENT (which occurs
3901 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3904 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3906 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3907 errors. Otherwise a message that provokes a temporary error (when other
3908 messages do not) can cause a whole host to time out.
3910 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3911 addresses were routed directly to files or pipes from a redirect router.
3912 File deliveries just didn't batch; pipe deliveries might have suffered
3915 PH/06 A failure to get a lock for a hints database would erroneously always say
3916 "Failed to get write lock", even when it was really a read lock.
3918 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3919 of 0600. This has been changed to use the value of the lockfile_mode
3920 option (which defaults to 0600).
3922 PH/08 Applied small patch from the Sieve maintainer.
3924 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3925 folder from quota calculations, a direct delivery into this folder messed
3926 up the contents of the maildirsize file. This was because the regex was
3927 used only to exclude .Trash (or whatever) when the size of the mailbox
3928 was calculated. There was no check that a delivery was happening into an
3929 excluded directory. This bug has been fixed by ignoring all quota
3930 processing for deliveries into excluded directories.
3932 PH/10 Added the maildirfolder_create_regex option to appendfile.
3938 PH/01 The code for finding all the local interface addresses on a FreeBSD
3939 system running IPv6 was broken. This may well have applied to all BSD
3940 systems, as well as to others that have similar system calls. The broken
3941 code found IPv4 interfaces correctly, but gave incorrect values for the
3942 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3943 that it would not match correctly against @[] and not recognize the IPv6
3946 PH/02 The ipliteral router was not recognizing addresses of the form user@
3947 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3949 PH/03 Added disable_ipv6.
3951 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3952 decoded form, because it is most often used to construct To: headers
3953 lines in autoreplies, and the decoded form may well be syntactically
3954 invalid. However, $reply_address has leading white space removed, and all
3955 newlines turned into spaces so that the autoreply transport does not
3958 PH/05 If group was specified without a user on a router, and no group or user
3959 was specified on a transport, the group from the router was ignored.
3961 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3962 for visible compile-time settings that can be used to change these
3963 numbers, for those that want even more. Backwards compatibility with old
3964 spool files has been maintained. However, going back to a previous Exim
3965 release will lost any variables that are in spool files.
3967 PH/07 Two small changes when running in the test harness: increase delay when
3968 passing a TCP/IP connection to a new process, in case the original
3969 process has to generate a bounce, and remove special handling of
3970 127.0.0.2 (sic), which is no longer necessary.
3972 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3973 be the same on different OS.
3975 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3978 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3979 whether --show-vars was specified or not
3981 JJ/02 exipick: Added support for new ACL variable spool format introduced
3984 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3985 syntactically invalid From: or Reply-to: line, and a filter used this to
3986 generate an autoreply, and therefore failed to obtain an address for the
3987 autoreply, Exim could try to deliver to a non-existent relative file
3988 name, causing unrelated and misleading errors. What now happens is that
3989 it logs this as a hard delivery error, but does not attempt to create a
3992 PH/11 The exinext utility has a -C option for testing purposes, but although
3993 the given file was scanned by exinext itself; it wasn't being passed on
3994 when Exim was called.
3996 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3997 an end-of-file indication when reading a command response.
3999 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4000 compiled. In many other places in Exim, IPv6 addresses are always
4001 recognized, so I have changed this. It also means that IPv4 domain
4002 literals of the form [IPV4:n.n.n.n] are now always recognized.
4004 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4005 used if the router is not running as root, for example, when verifying at
4006 ACL time, or when using -bh. The debugging output from this situation was
4007 non-existent - all you got was a failure to exec. I have made two
4010 (a) Failures to set uid/gid, the current directory, or a process leader
4011 in a subprocess such as that created by queryprogram now generate
4012 suitable debugging output when -d is set.
4014 (b) The queryprogram router detects when it is not running as root,
4015 outputs suitable debugging information if -d is set, and then runs
4016 the subprocess without attempting to change uid/gid.
4018 PH/15 Minor change to Makefile for building test_host (undocumented testing
4021 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4022 additional section of a DNS packet that returns MX or SRV records.
4023 Instead, it always explicitly searches for A/AAAA records. This avoids
4024 major problems that occur when a DNS server includes only records of one
4025 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4026 fixed another bug: if SRV records were looked up and the corresponding
4027 address records were *not* found in the additional section, the port
4028 values from the SRV records were lost.
4030 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4031 using the correct key (the original address) when searching the retry
4032 rules in order to find which one to use for generating the retry hint.
4034 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4035 adding the default one. Similarly, if it contains a Reply-To: header, the
4036 errors_reply_to option, if set, is not used.
4038 PH/19 When calculating a retry time, Exim used to measure the "time since
4039 failure" by looking at the "first failed" field in the retry record. Now
4040 it does not use this if it is later than than the arrival time of the
4041 message. Instead it uses the arrival time. This makes for better
4042 behaviour in cases where some deliveries succeed, thus re-setting the
4043 "first failed" field. An example is a quota failure for a huge message
4044 when small messages continue to be delivered. Without this change, the
4045 "time since failure" will always be short, possible causing more frequent
4046 delivery attempts for the huge message than are intended.
4047 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4049 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4050 $1, $2, $3) because the numerical variables can be reset during some
4051 expansion items (e.g. "match"), thereby losing the authentication data.
4053 PH/21 Make -bV show the size of off_t variables so that the test suite can
4054 decide whether to run tests for quotas > 2G.
4056 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4057 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4058 filecount value is greater than 2G or if a quota value is greater than 2G
4059 on a system where the size of off_t is not greater than 4, a panic error
4062 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4063 never match. The debug and -bh output now contains an explicit error
4064 message indicating a malformed IPv4 address or mask.
4066 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4067 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4068 PH/23 above applies.
4070 PH/25 Do not write to syslog when running in the test harness. The only
4071 occasion when this arises is a failure to open the main or panic logs
4072 (for which there is an explicit test).
4074 PH/26 Added the /no_tell option to "control=freeze".
4076 PH/27 If a host name lookup failed very early in a connection, for example, if
4077 the IP address matched host_lookup and the reverse lookup yielded a name
4078 that did not have a forward lookup, an error message of the form "no IP
4079 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4080 could be logged. Now it outputs the IP address instead of "NULL".
4082 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4083 allows the sender and the authenticated sender to be set when
4084 submitting a message from within Exim. Since child_open_exim() is
4085 documented for local_scan(), the new function should be too.
4087 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4088 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4089 results in an empty string is now treated as unset.
4091 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4093 PH/31 Added sender_verify_fail logging option.
4095 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4096 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4097 tidied the source and removed it altogether.
4099 PH/33 When a queue run was abandoned because the load average was too high, a
4100 log line was always written; now it is written only if the queue_run log
4101 selector is set. In addition, the log line for abandonment now contains
4102 information about the queue run such as the pid. This is always present
4103 in "start" and "stop" lines but was omitted from the "abandon" line.
4105 PH/34 Omit spaces between a header name and the colon in the error message that
4106 is given when verify = headers_syntax fails (if there are lots of them,
4107 the message gets confusing).
4109 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4110 names, as there are now some PTR records that contain slashes. This check
4111 is only to protect against broken name servers that fall over on strange
4112 characters, so the fact that it applies to all lookups doesn't matter.
4114 PH/36 Now that the new test suite is complete, we can remove some of the
4115 special code in Exim that was needed for the old test suite. For example,
4116 sorting DNS records because real resolvers return them in an arbitrary
4117 order. The new test suite's fake resolver always returns records in the
4120 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4121 bounces) except when queue_only is set, to avoid logging races between
4122 the different processes.
4124 PH/38 Panic-die if .include specifies a non-absolute path.
4126 PH/39 A tweak to the "H" retry rule from its user.
4128 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4129 a label. They prevented compilation on older perls.
4131 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4132 a warning to be raised on newish perls.
4134 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4135 on queue. Changes to match documented behaviour of showing count of
4136 messages matching specified criteria.
4138 PH/40 Changed the default ident timeout from 30s to 5s.
4140 PH/41 Added support for the use of login_cap features, on those BSD systems
4141 that have them, for controlling the resources used by pipe deliveries.
4143 PH/42 The content-scanning code uses fopen() to create files in which to put
4144 message data. Previously it was not paying any attention to the mode of
4145 the files. Exim runs with umask(0) because the rest of the code creates
4146 files with open(), and sets the required mode explicitly. Thus, these
4147 files were ending up world-writeable. This was not a big issue, because,
4148 being within the spool directory, they were not world-accessible. I have
4149 created a function called modefopen, which takes an additional mode
4150 argument. It sets umask(777), creates the file, chmods it to the required
4151 mode, then resets the umask. All the relevant calls to fopen() in the
4152 content scanning code have been changed to use this function.
4154 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4155 to 24 hours. This avoids potential overflow problems when processing G
4156 and H retry rules. I suspect nobody ever tinkers with this value.
4158 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4160 PH/45 When the plaintext authenticator is running as a client, the server's
4161 challenges are checked to ensure they are valid base64 strings. By
4162 default, the authentication attempt is cancelled if an invalid string is
4163 received. Setting client_ignore_invalid_base64 true ignores these errors.
4164 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4165 they are received. Thus, the responses can be made to depend on the
4166 challenges. If an invalid string is ignored, an empty string is placed in
4169 PH/46 Messages that are created by the autoreply transport now contains a
4170 References: header, in accordance with RFCs 2822 and 3834.
4172 PH/47 Added authenticated_sender_force to the smtp transport.
4174 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4176 PH/49 Installed latest patch from the Sieve maintainer.
4178 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4179 was also set, the appendfile transport was unnecessarily scanning a
4180 directory of message files (e.g. for maildir delivery) to find the count
4181 of files (along with the size), even though it did not need this
4182 information. It now does the scan only if it needs to find either the
4183 size of the count of files.
4185 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4187 PH/52 Two bugs concerned with error handling when the smtp transport is
4190 (i) Exim was not creating retry information for temporary errors given
4191 for individual recipients after the DATA command when the smtp transport
4192 was used in LMTP mode. This meant that they could be retried too
4193 frequently, and not timed out correctly.
4195 (ii) Exim was setting the flag that allows error details to be returned
4196 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4197 recipients that were returned after the DATA command.
4199 PH/53 This is related to PH/52, but is more general: for any failing address,
4200 when detailed error information was permitted to be returned to the
4201 sender, but the error was temporary, then after the final timeout, only
4202 "retry timeout exceeded" was returned. Now it returns the full error as
4203 well as "retry timeout exceeded".
4205 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4206 do this, and (what is worse) MTAs that accept it.
4208 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4209 will now be deprecated.
4211 PH/56 New os.c-cygwin from the Cygwin maintainer.
4213 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4214 formats (previously only available in exim formats via -bpr, -bpru,
4215 and -bpra. Now also available in native and exiqgrep formats)
4217 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4218 with very large, slow to parse queues
4220 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4222 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4224 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4225 responses to authentication challenges, though it was showing the
4226 challenges; (ii) I've removed the CR characters from the debug output for
4229 PH/58 Allow for the insertion of a newline as well as a space when a string
4230 is turned into more than one encoded-word during RFC 2047 encoding. The
4231 Sieve code now uses this.
4233 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4234 data_4xx, lost_connection, tls_required.
4236 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4237 message was being sent as an SMTP response.
4239 PH/61 Add -l and -k options to exicyclog.
4241 PH/62 When verifying, if an address was redirected to one new address, so that
4242 verification continued, and the new address failed or deferred after
4243 having set something in $address_data, the value of $address_data was not
4244 passed back to the ACL. This was different to the case when no
4245 redirection occurred. The value is now passed back in both cases.
4247 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4248 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4249 use login_cap.h, so on its own it isn't the distinguishing feature. The
4250 new name refers directly to the setclassresources() function.
4252 PH/65 Added configuration files for NetBSD3.
4254 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4256 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4257 is preferred over IPv4.
4259 PH/68 The bounce_return_message and bounce_return_body options were not being
4260 honoured for bounces generated during the reception of non-SMTP messages.
4261 In particular, this applied to messages rejected by the ACL. This bug has
4262 been fixed. However, if bounce_return_message is true and bounce_return_
4263 body is false, the headers that are returned for a non-SMTP message
4264 include only those that have been read before the error was detected.
4265 (In the case of an ACL rejection, they have all been read.)
4267 PH/69 The HTML version of the specification is now built in a directory called
4268 spec_html instead of spec.html, because the latter looks like a path with
4269 a MIME-type, and this confuses some software.
4271 PH/70 Catch two compiler warnings in sieve.c.
4273 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4274 function verify_get_ident() calls ip_connect() to connect a socket, but
4275 if the "connect()" function timed out, ip_connect() used to close the
4276 socket. However, verify_get_ident() also closes the socket later, and in
4277 between Exim writes to the log, which may get opened at this point. When
4278 the socket was closed in ip_connect(), the log could get the same file
4279 descriptor number as the socket. This naturally causes chaos. The fix is
4280 not to close the socket in ip_connect(); the socket should be closed by
4281 the function that creates it. There was only one place in the code where
4282 this was missing, in the iplookup router, which I don't think anybody now
4283 uses, but I've fixed it anyway.
4285 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4286 well as to direct DNS lookups. Otherwise the handling of names in host
4287 lists is inconsistent and therefore confusing.
4293 PH/01 Two changes to the default runtime configuration:
4295 (1) Move the checks for relay_from_hosts and authenticated clients from
4296 after to before the (commented out) DNS black list checks.
4298 (2) Add control=submission to the relay_from_hosts and authenticated
4299 clients checks, on the grounds that messages accepted by these
4300 statements are most likely to be submissions.
4302 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4304 (1) Generate an error if the third argument for the ${prvs expansion is
4307 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4310 (3) Reset the variables that are obtained from the first argument of
4311 ${prvscheck and used in the second argument before leaving the code,
4312 because their memory is reclaimed, so using them afterwards may do
4315 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4316 one (it's much easier than Tom thought :-).
4318 (5) Because of (4), we can now allow for the use of $prvscheck_result
4319 inside the third argument.
4321 PH/03 For some reason, the default setting of PATH when running a command from
4322 a pipe transport was just "/usr/bin". I have changed it to
4325 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4326 anything to be listed in the output from -bV.
4328 PH/05 When a filter generated an autoreply, the entire To: header line was
4329 quoted in the delivery log line, like this:
4331 => >A.N.Other <ano@some.domain> <original@ddress> ...
4333 This has been changed so that it extracts the operative address. There
4334 may be more than one such address. If so, they are comma-separated, like
4337 => >ano@some.domain,ona@other.domain <original@ddress> ...
4339 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4340 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4341 not being looked up in the rDNS to get a host name, Exim was showing the
4342 IP address twice in Received: lines, even though the IP addresses were
4343 identical. For example:
4345 Received: from [1.2.3.4] (helo=[1.2.3.4])
4347 However, if the real host name was known, it was omitting the HELO data
4348 if it matched the actual IP address. This has been tidied up so that it
4349 doesn't show the same IP address twice.
4351 PH/07 When both +timestamp and +memory debugging was on, the value given by
4352 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4353 called by the debug printing, thereby overwriting the timestamp buffer.
4354 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4356 PH/08 When the original message was included in an autoreply transport, it
4357 always said "this is a copy of the message, including all the headers",
4358 even if body_only or headers_only was set. It now gives an appropriate
4361 PH/09 Applied a patch from the Sieve maintainer which:
4363 o fixes some comments
4364 o adds the (disabled) notify extension core
4365 o adds some debug output for the result of if/elsif tests
4366 o points to the current vacation draft in the documentation
4367 and documents the missing references header update
4371 o fixes a bug in processing the envelope test (when testing
4372 multiple envelope elements, the last element determined the
4375 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4376 Electronic Mail") by including:
4378 Auto-submitted: auto-generated
4380 in the messages that it generates (bounce messages and others, such as
4381 warnings). In the case of bounce messages for non-SMTP messages, there was
4382 also a typo: it was using "Auto_submitted" (underscore instead of
4383 hyphen). Since every message generated by Exim is necessarily in response
4384 to another message, thes have all been changed to:
4386 Auto-Submitted: auto-replied
4388 in accordance with these statements in the RFC:
4390 The auto-replied keyword:
4392 - SHOULD be used on messages sent in direct response to another
4393 message by an automatic process,
4395 - MUST NOT be used on manually-generated messages,
4397 - MAY be used on Delivery Status Notifications (DSNs) and Message
4398 Disposition Notifications (MDNs),
4400 - MUST NOT be used on messages generated by automatic or periodic
4401 processes, except for messages which are automatic responses to
4404 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4405 to the default Received: header definition.
4407 PH/12 Added log selector acl_warn_skipped (default on).
4409 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4410 variables because (a) they are in the wrong storage pool and (b) even if
4411 they were copied, it wouldn't work properly because of the caching.
4413 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4414 checking when decoding. Apparently there are clients that generate
4415 overlong encoded strings. Why am I not surprised?
4417 PH/15 If the first argument of "${if match_address" was not empty, but did not
4418 contain an "@" character, Exim crashed. Now it writes a panic log message
4419 and treats the condition as false.
4421 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4423 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4424 extension "envelope-auth". The code is finished and in agreement with
4425 other implementations, but there is no documentation so far and in fact,
4426 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4427 not changing the active code.
4429 Print executed "if" and "elsif" statements when debugging is used. This
4430 helps a great deal to understand what a filter does.
4432 Document more things not specified clearly in RFC3028. I had all this
4433 sorted out, when out of a sudden new issues came to my mind. Oops."
4435 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4438 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4439 canonical form (as documented). However, after a host name lookup from
4440 the IP address, check_host() was doing a simple string comparison with
4441 addresses acquired from the DNS when checking that the found name did
4442 have the original IP as one of its addresses. Since any found IPv6
4443 addresses are likely to be in abbreviated form, the comparison could
4444 fail. Luckily, there already exists a function for doing the comparison
4445 by converting both addresses to binary, so now that is used instead of
4446 the text comparison.
4448 PH/20 There was another similar case to PH/19, when a complete host name was
4449 given in a host list; looking up its IP address could give an abbreviated
4450 form, whereas the current host's name might or might not be abbreviated.
4451 The same fix has been applied.
4457 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4458 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4461 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4462 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4464 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4466 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4467 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4468 Also, for "Auto-Submitted", treat anything other than "no" as
4469 non-personal, in accordance with RFC 3834. (Previously it treated
4470 anything starting "auto-" as non-personal.)
4472 TF/01 The control=submission/name=... option had a problem with syntax
4473 errors if the name included a slash character. The /name= option
4474 now slurps the rest of the string, so it can include any characters
4475 but it must come last in the list of options (after /sender_retain
4478 PH/05 Some modifications to the interface to the fake nameserver for the new
4486 TK/01 Added the "success_on_redirect" address verification option. See
4487 NewStuff for rationale and an example.
4489 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4491 PH/02 Patch to exigrep to allow it to work on syslog lines.
4493 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4494 fread() to skip over the body file's header line, because in Cygwin the
4495 header line is locked and is inaccessible.
4497 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4498 co-exist for some time) to make it clear that it is the Exim ID that is
4499 referenced, not the Message-ID: header line.
4501 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4502 string_format() function, because snprintf() does not exist on all
4505 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4506 ${stat: expansion item.
4508 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4509 protocol synchronization error", to keep the pedants happy.
4511 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4512 well as for IRIX systems, when gcc is being used. See the host.c source
4515 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4517 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4520 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4521 transport and to the smtp transport in LMTP mode.
4523 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4525 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4526 run a filter in a subprocess. This could lead to confusion in subsequent
4527 lookups in the parent process. There should also be a search_tidyup() at
4528 the end of the subprocess.
4530 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4531 only if the host matched helo_try_verify_hosts, which caused the
4532 verification to occur when the EHLO/HELO command was issued. The ACL just
4533 tested the remembered result. Now, if a previous verification attempt has
4534 not happened, "verify = helo" does it there and then.
4536 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4538 TK/03 Fix log output including CR from clamd.
4540 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4541 exist provoked a memory error which could cause a segfault.
4543 PH/15 Installed PCRE 6.2
4545 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4547 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4548 of the problem. Specifically, suggested +O2 rather than +O1 for the
4551 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4553 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4554 record, the port was not correctly logged when the outgoing_port log
4555 selector was set (it logged the transort's default port).
4557 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4558 fallback_hosts, and "hosts" in the smtp transport.
4560 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4561 host errors such as "Connection refused".
4563 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4564 authentication with radiusclient 0.4.9:
4566 - Error returned from rc_read_config was caught wrongly
4567 - Username/password not passed on to radius server due to wrong length.
4569 The presumption is that some radiusclient API changes for 4.51/PH/17
4570 were not taken care of correctly. The code is still untested by me (my
4571 Linux distribution still has 0.3.2 of radiusclient), but it was
4572 contributed by a Radius user.
4574 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4575 expanding the "port" option of the smtp transport.
4577 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4578 while reading a MIME header. Thanks to Tom Hughes for a patch.
4580 PH/24 Include config.h inside local_scan.h so that configuration settings are
4583 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4584 that in an ACL for RCPT (for example), you can examine exactly what was
4587 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4588 commands, but it was not correctly comparing the address with the actual
4589 client host address. Thus, it would show the EHLO address in Received:
4590 header lines when this was not necessary.
4592 PH/27 Added the % operator to ${eval:}.
4594 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4595 it should be ignoring failures (because with -C, for example, it has lost
4596 privilege). It wasn't ignoring creation failures other than "already
4599 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4602 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4603 because an input line was too long, either on its own, or by virtue of
4604 too many continuations, the temporary file was not being removed, and the
4605 return code was incorrect.
4607 PH/31 Missing "BOOL" in function definition in filtertest.c.
4609 PH/32 Applied Sieve patches from the maintainer.
4611 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4613 PH/33 Added "verify = not_blind".
4615 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4616 Local/Makefile (with some defaults set). These are used in built scripts
4617 such as exicyclog, but they have never been used in the exim_install
4618 script (though there are many overriding facilities there). I have
4619 arranged that the exim_install script now takes note of these two
4622 PH/35 Installed configuration files for Dragonfly.
4624 PH/36 When a locally submitted message by a trusted user did not contain a
4625 From: header, and the sender address was obtained from -f or from an SMTP
4626 MAIL command, and the trusted user did not use -F to supply a sender
4627 name, $originator_name was incorrectly used when constructing a From:
4628 header. Furthermore, $originator_name was used for submission mode
4629 messages from external hosts without From: headers in a similar way,
4630 which is clearly wrong.
4632 PH/37 Added control=suppress_local_fixups.
4634 PH/38 When log_selector = +received_sender was set, and the addition of the
4635 sender made the log line's construction buffer exactly full, or one byte
4636 less than full, an overflow happened when the terminating "\n" was
4639 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4640 when the result of a list match is failure because a DNS lookup failed.
4642 PH/40 RM_COMMAND is now used in the building process.
4644 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4645 the "build-* directories that it finds.
4647 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4648 address in a domain literal was a prefix of an interface address.
4650 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4651 when verifying a sender address, unless rewrite_headers is false.
4653 PH/44 Wrote a long comment about why errors_to addresses are verified as
4654 recipients, not senders.
4656 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4657 the ratelimit ACL was added.
4659 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4661 PH/46 Added extra information about PostgreSQL errors to the error string.
4663 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4664 avoiding the need to install special zones in a real server. This is
4665 backwards compatible; if it can't find the fake resolver, it drops back.
4666 Thus, both old and new test suites can be run.
4668 TF/02 Added util/ratelimit.pl
4670 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4671 clock is set back in time.
4673 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4674 Candler <B.Candler@pobox.com>.
4676 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4677 OK for addresses that are the result of redirections.
4679 PH/48 A number of further additions for the benefit of the new test suite,
4680 including a fake gethostbyname() that interfaces to the fake DNS resolver
4683 TF/06 The fix for widen_domains has also been applied to qualify_single and
4684 search_parents which are the other dnslookup options that can cause
4687 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4690 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4692 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4693 service" if it encountered an MX record with an empty target hostname.
4694 The message is now "an MX or SRV record indicated no SMTP service".
4696 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4697 if the DNS of the sending site is misconfigured. This is quite a
4698 common situation. This change restores the behaviour of treating a
4699 helo verification defer as a failure.
4701 PH/51 If self=fail was set on a router, the bounce message did not include the
4702 actual error message.
4708 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4710 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4711 command itself ended in error, the underlying message about the transport
4712 filter timeout was being overwritten with the pipe command error. Now the
4713 underlying error message should be appended to the second error message.
4715 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4717 PH/02 Reduce the amount of output that "make" produces by default. Full output
4718 can still be requested.
4720 PH/03 The warning log line about a condition test deferring for a "warn" verb
4721 was being output only once per connection, rather than after each
4722 occurrence (because it was using the same function as for successful
4723 "warn" verbs). This seems wrong, so I have changed it.
4725 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4726 it should not have, which might have caused a crash in the right
4727 circumstances, but probably never did.
4729 PH/04 Installed a modified version of Tony Finch's patch to make submission
4730 mode fix the return path as well as the Sender: header line, and to
4731 add a /name= option so that you can make the user's friendly name appear
4734 TF/03 Added the control = fakedefer ACL modifier.
4736 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4737 Mark Lowes for thorough testing.
4739 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4741 TK/03 Merged latest SRS patch from Miles Wilton.
4743 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4744 with the definition in sysexits.h (which is #included earlier).
4745 Fortunately, Exim does not actually use EX_OK. The code used to try to
4746 preserve the sysexits.h value, by assuming that macro definitions were
4747 scanned for macro replacements. I have been disabused of this notion,
4748 so now the code just undefines EX_OK before #including unistd.h.
4750 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4751 in the smtp transport. When a block could not be written in a single
4752 write() function, the timeout was being re-applied to each part-write.
4753 This seems wrong - if the receiver was accepting one byte at a time it
4754 would take for ever. The timeout is now adjusted when this happens. It
4755 doesn't have to be particularly precise.
4757 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4758 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4760 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4761 without a domain if the check to <postmaster@domain> fails.
4763 SC/01 Eximstats: added -xls and the ability to specify output files
4764 (patch written by Frank Heydlauf).
4766 SC/02 Eximstats: use FileHandles for outputting results.
4768 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4770 SC/04 Eximstats: fixed display of large numbers with -nvr option
4772 SC/05 Eximstats: fixed merging of reports with empty tables.
4774 SC/06 Eximstats: added the -include_original_destination flag
4776 SC/07 Eximstats: removed tabs and trailing whitespace.
4778 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4780 TK/06 MBOX spool code: Add real "From " MBOX separator line
4781 so the .eml file is really in mbox format (even though
4782 most programs do not really care). Patch from Alex Miller.
4784 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4785 The latter is generated from $received_to and is only set if the
4786 message has one envelope recipient. SA can use these headers,
4787 obviously out-of-the-box. Patch from Alex Miller.
4789 PH/08 The ${def test on a variable was returning false if the variable's
4790 value was "0", contrary to what the specification has always said!
4791 The result should be true unless the variable is empty.
4793 PH/09 The syntax error of a character other than { following "${if
4794 def:variable_name" (after optional whitespace) was not being diagnosed.
4795 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4796 accidental colon was present, for example, could give incorrect results.
4798 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4799 result is used (not including appendfile, where other changes are about
4802 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4803 This involved changing a lot of size variables from int to off_t. It
4804 should work with maildirs and everything.
4806 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4807 spamd dying while we are connected to it.
4809 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4812 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4813 function for BDB 4.3.
4815 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4817 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4818 the sources for PCRE have been re-arranged and more files are now
4821 PH/15 The code I had for printing potentially long long variables in PH/11
4822 above was not the best (it lost precision). The length of off_t variables
4823 is now inspected at build time, and an appropriate printing format (%ld
4824 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4825 to be "long long int" or "long int". This is needed for the internal
4826 formatting function string_vformat().
4828 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4829 the configuration file to be ":syslog", then the script "guesses" where
4830 the logs files are, rather than using the compiled in default. In our
4831 case the guess is not the same as the compiled default, so the script
4832 suddenly stopped working when I started to use syslog. The patch checks
4833 to see if log_file_path is "". If so, it attempts to read it from exim
4834 with no configuration file to get the compiled in version, before it
4835 falls back to the previous guessing code."
4837 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4838 implementing BATV in an Exim configuration. See NewStuff for the gory
4841 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4842 Makefile that are specific to HP-UX.
4844 PH/18 If the "use_postmaster" option was set for a recipient callout together
4845 with the "random" option, the postmaster address was used as the MAIL
4846 FROM address for the random test, but not for the subsequent recipient
4847 test. It is now used for both.
4849 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4850 patch removes a few documentation additions to RFC 3028, because the
4851 latest draft now contains them. It adds the new en;ascii-case comparator
4852 and a new error check for 8bit text in MIME parts. Comparator and
4853 require names are now matched exactly. I enabled the subaddress
4854 extension, but it is not well tested yet (read: it works for me)."
4856 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4857 rework some of the code of TK/09 above to avoid the hardwired use of
4858 "%lld" and "long long". Replaced the call to snprintf() with a call to
4861 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4862 records point to non-existent hosts", "retry timeout exceeded", and
4863 "retry time not reached for any host after a long failure period".
4865 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4866 experimental DomainKeys support:
4868 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4869 (2) On an error such as an illegally used "control", the wrong name for
4870 the control was given.
4872 These problems did NOT occur unless DomainKeys support was compiled.
4874 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4876 PH/24 Added ${if match_ip condition.
4878 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4879 databases so that it will be absolutely obvious if a crash occurs in the
4880 DB library. This is a regular occurrence (often caused by mis-matched
4883 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4884 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4885 picked up on a user's system that detects such things. There doesn't seem
4886 to be a gcc warning option for this - only an attribute that has to be
4887 put on the function's prototype. It seems that in Fedora Core 4 they have
4888 set this on a number of new functions. No doubt there will be more in due
4891 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4892 specify a transport. However, if an address that was verified by such a
4893 router was the subject of a callout, Exim crashed because it tried to
4894 read the rcpt_include_affixes from the non-existent transport. Now it
4895 just assumes that the setting of that option is false. This bug was
4896 introduced by 4.51/PH/31.
4898 PH/28 Changed -d+all to exclude +memory, because that information is very
4899 rarely of interest, but it makes the output a lot bigger. People tend to
4900 do -d+all out of habit.
4902 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4903 code in os-type was giving problems when libc.so lives in lib64, like on
4906 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4907 aren't the modern standard, and it seems that some systems' include files
4908 don't always have them. Exim was already checking for some of the newer
4909 ones like T_AAAA, and defining it itself. I've added checks for all the
4910 record types that Exim uses.
4912 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4913 not automatically generating a new one, as it is supposed to. This
4914 prevented TLS from working. If the file did exist, but contained invalid
4915 data, a new version was generated, as expected. It was only the case of a
4916 non-existent file that was broken.
4918 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4919 with a change in libdomainkeys > 0.64.
4921 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4922 from DNS. If the selector record carries the flag, it now has
4923 precedence over the domain-wide flag.
4925 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4927 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4928 the use of a port name that isn't defined in /etc/services) occurred, the
4929 message was deferred as in a normal delivery, and thus remained on the
4930 spool, instead of being failed because of the mua_wrapper setting. This
4931 is now fixed, and I tidied up some of the mua_wrapper messages at the
4934 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4935 the messages in a hash of arrays rather than using individual hashes.
4936 This is a bit cleaner and results in dramatic memory savings, albeit
4937 at a slight CPU cost.
4939 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4940 as requested by Marc Sherman.
4942 SC/10 Eximstats: added histograms for user specified patterns as requested
4945 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4947 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4948 fopen() in the content-scanning modules that did not already have it.
4954 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4955 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4957 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4959 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4961 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4962 to test Sieve filters that use "vacation".
4964 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4965 that changes the way the GnuTLS parameters are stored in the cache file.
4966 The new format can be generated externally. For backward compatibility,
4967 if the data in the cache doesn't make sense, Exim assumes it has read an
4968 old-format file, and it generates new data and writes a new file. This
4969 means that you can't go back to an older release without removing the
4972 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4973 work if there are any delivery delays because "one_time" forces the
4974 parent to be marked "delivered", so its unseen clone is never tried
4975 again. For this reason, Exim now forbids the simultaneous setting of
4978 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4979 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4980 entry if you want to know the details. The fix, however, neglected to
4981 consider the case when local delivery batching is involved. The test for
4982 "previously delivered" was not happening when checking to see if an
4983 address could be batched with a previous (undelivered) one; under
4984 certain circumstances this could lead to multiple deliveries to the same
4987 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4988 in its include files, and this causes problems building Exim.
4990 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4991 header_syntax) but Exim was just ignoring anything given after a slash.
4992 In particular, this caused confusion with an attempt to use "verify =
4993 reverse_host_lookup/defer_ok". An error is now given when options are
4994 supplied for verify items that do not have them. (Maybe reverse_host_
4995 lookup should have a defer_ok option, but that's a different point.)
4997 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4998 defined by RFC 821) to 2048, because there were problems with some AUTH
4999 commands, and RFC 1869 says the size should be increased for extended
5000 SMTP commands that take arguments.
5002 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5005 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5006 "unknown" error; now it says that the functionality isn't in the binary.
5008 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5009 an address' error message when a string expansion fails (syntax or
5010 whatever). Otherwise the password may appear in the log. Following change
5011 PH/42 below, there is no longer a chance of it appearing in a bounce
5014 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5016 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5017 of its addresses was ever tried. (Bugzilla bug #2.)
5019 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5020 the result incorrectly in the debug output. (It correctly added a newline
5021 to what was transported.)
5023 TF/01 Added $received_time.
5025 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5026 commented out examples of how to interface to a virus scanner and to
5027 SpamAssassin. Also added commented examples of av_scanner and
5028 spamd_address settings.
5030 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5031 and controls are allowed in which ACLs. There were a couple of minor
5032 errors. Some of the entries in the conditions table (which is a table of
5033 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5034 negation of where the condition IS allowed.
5036 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5038 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5039 header file does not have a version number, so I've had to invent a new
5040 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5041 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5042 radiusclient), but it was contributed by a Radius user.
5044 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5045 files or directories, for OpenSSL.
5047 PH/19 When an Exim process that is running as root has to create an Exim log
5048 file, it does so in a subprocess that runs as exim:exim so as to get the
5049 ownership right at creation (otherwise, other Exim processes might see
5050 the file with the wrong ownership). There was no test for failure of this
5051 fork() call, which would lead to the process getting stuck as it waited
5052 for a non-existent subprocess. Forks do occasionally fail when resources
5053 run out. I reviewed all the other calls to fork(); they all seem to check
5056 PH/20 When checking for unexpected SMTP input at connect time (before writing
5057 the banner), Exim was not dealing correctly with a non-positive return
5058 from the read() function. If the client had disconnected by this time,
5059 the result was a log entry for a synchronization error with an empty
5060 string after "input=" when read() returned zero. If read() returned -1
5061 (an event I could not check), uninitialized data bytes were printed.
5062 There were reports of junk text (parts of files, etc) appearing after
5065 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5067 PH/22 Added support for macro redefinition, and (re)definition in between
5068 driver and ACL definitions.
5070 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5071 forgetting to use the resulting value; it was using the unexpanded value.
5073 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5074 hadn't been configured. The fix is from Juergen Kreileder, who
5075 understands it better than I do:
5077 "Here's what I see happening with three configured cyrus_sasl
5078 authenticators configured (plain, login, cram-md5):
5080 On startup auth_cyrus_sasl_init() gets called for each of these.
5081 This means three calls to sasl_listmech() without a specified mech_list.
5082 => SASL tests which mechs of all available mechs actually work
5083 => three warnings about OTP not working
5084 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5086 With the patch, sasl_listmech() also gets called three times. But now
5087 SASL's mech_list option is set to the server_mech specified in the the
5088 authenticator. Or in other words, the answer from sasl_listmech()
5089 gets limited to just the mech you're testing for (which is different
5091 => the return list contains just 'plain' or 'login', 'cram-md5' or
5092 nothing depending on the value of ob->server_mech.
5094 I've just tested the patch: Authentication still works fine,
5095 unavailable mechs specified in the exim configuration are still
5096 caught, and the auth.log warnings about OTP are gone."
5098 PH/25 When debugging is enabled, the contents of the command line are added
5099 to the debugging output, even when log_selector=+arguments is not
5102 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5103 answer is "GNU", and only if the return is "GNU/something" is the answer
5106 PH/27 $acl_verify_message is now set immediately after the failure of a
5107 verification in an ACL, and so is available in subsequent modifiers. In
5108 particular, the message can be preserved by coding like this:
5110 warn !verify = sender
5111 set acl_m0 = $acl_verify_message
5113 Previously, $acl_verify_message was set only while expanding "message"
5114 and "log_message" when a very denied access.
5116 PH/28 Modified OS/os.c-Linux with
5118 -#ifndef OS_LOAD_AVERAGE
5119 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5121 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5122 nomenclature these days.)
5124 PH/29 Installed patch from the Sieve maintainer that adds the options
5125 sieve_useraddress and sieve_subaddress to the redirect router.
5127 PH/30 In these circumstances:
5128 . Two addresses routed to the same list of hosts;
5129 . First host does not offer TLS;
5130 . First host accepts first address;
5131 . First host gives temporary error to second address;
5132 . Second host offers TLS and a TLS session is established;
5133 . Second host accepts second address.
5134 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5135 and peerdn, if requested) that were in fact used only for the second
5138 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5139 attention to any local part prefix or suffix that was matched by the
5140 router that accepted the address. It now behaves in the same way as it
5141 does for delivery: the affixes are removed from the local part unless
5142 rcpt_include_affixes is set on the transport.
5144 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5145 timeout during the DATA phase of an incoming message.
5147 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5148 applied a patch sanctioned by the Sieve maintainer.
5150 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5151 the uid or gid is negative. A case of a negative gid caused this to be
5152 noticed. The fix allows for either to be negative.
5154 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5155 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5158 PH/36 The change PH/12 above was broken. Fixed it.
5160 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5161 the grounds that routing the same address twice would always produce the
5162 same answer. This might have been true once, but it is certainly no
5163 longer true now. Routing a child address may depend on the previous
5164 routing that produced that child. Some complicated redirection strategies
5165 went wrong when messages had multiple recipients, and made Exim's
5166 behaviour dependent on the order in which the addresses were given.
5168 I have moved the duplicate checking until after the routing is complete.
5169 Exim scans the addresses that are assigned to local and remote
5170 transports, and removes any duplicates. This means that more work will be
5171 done, as duplicates will always all be routed, but duplicates are
5172 presumably rare, so I don't expect this is of any significance.
5174 For deliveries to pipes, files, and autoreplies, the duplicate checking
5175 still happens during the routing process, since they are not going to be
5178 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5179 It corrects a timeout issue with spamd. This is Ian's comment: "The
5180 background is that sometimes spamd either never reads data from a
5181 connection it has accepted, or it never writes response data. The exiscan
5182 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5183 blindly assumes that writes won't block so it may never time out."
5185 PH/39 Allow G after quota size as well as K and M.
5187 PH/40 The value set for $authenticated_id in an authenticator may not contain
5188 binary zeroes or newlines because the value is written to log lines and
5189 to spool files. There was no check on this. Now the value is run through
5190 the string_printing() function so that such characters are converted to
5191 printable escape sequences.
5193 PH/41 $message_linecount is a new variable that contains the total number of
5194 lines in the message. Compare $body_linecount, which is the count for the
5197 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5198 bounce and delay warning messages, except in certain special cases, which
5201 (a) An SMTP error message from a remote host;
5202 (b) A message specified in a :fail: redirection;
5203 (c) A message specified in a "fail" command in a system filter;
5204 (d) A message specified in a FAIL return from the queryprogram router;
5205 (e) A message specified by the cannot_route_message router option.
5207 In these cases only, Exim does include the error details in bounce and
5208 warning messages. There are also a few cases where bland messages such
5209 as "unrouteable address" or "local delivery error" are given.
5211 PH/43 $value is now also set for the "else" part of a ${run expansion.
5213 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5214 being worked on, but at least Exim now implements the latest version to
5217 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5218 process to complete was treated as a delivery failure, a timeout while
5219 writing the message to the pipe was logged, but erroneously treated as a
5220 successful delivery. Such timeouts include transport filter timeouts. For
5221 consistency with the overall process timeout, these timeouts are now
5222 treated as errors, giving rise to delivery failures by default. However,
5223 there is now a new Boolean option for the pipe transport called
5224 timeout_defer, which, if set TRUE, converts the failures into defers for
5225 both kinds of timeout. A transport filter timeout is now identified in
5228 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5229 systems where "make" and "gmake" are different, calling "gmake" at top
5230 level broke things. I've arranged for the value of $(MAKE) to be passed
5231 from the Makefile to this script so that it can call the same version of
5235 A note about Exim versions 4.44 and 4.50
5236 ----------------------------------------
5238 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5239 changes of various kinds. As a consequence, a big documentation update was
5240 needed. This delayed the release for rather longer than seemed good, especially
5241 in the light of a couple of (minor) security issues. Therefore, the changes
5242 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5243 release. So 4.44 and 4.50 are in effect two different branches that both start
5246 I have left the 4.50 change log unchanged; it contains all the changes since
5247 4.43. The change log for 4.44 is below; many of its items are identical to
5248 those for 4.50. This seems to be the most sensible way to preserve the
5249 historical information.
5255 1. Minor wording change to the doc/README.SIEVE file.
5257 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5258 computation of the current number of files was incorrect.
5260 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5261 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5264 4. Give more explanation in the error message when the command for a transport
5265 filter fails to execute.
5267 5. There are several places where Exim runs a non-Exim command in a
5268 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5269 was being done only for the command run by the queryprogram router. It is
5270 now done for all such subprocesses. The other cases are: ${run, transport
5271 filters, and the commands run by the lmtp and pipe transports.
5273 6. Added CONFIGURE_GROUP build-time option.
5275 7. Some older OS have a limit of 256 on the maximum number of file
5276 descriptors. Exim was using setrlimit() to set 1000 as a large value
5277 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5278 systems. I've change it so that if it can't get 1000, it tries for 256.
5280 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5281 was an oversight, and furthermore, ever since the addition of extra
5282 controls (e.g. 4.43/32), the checks on when to allow different forms of
5283 "control" were broken. There should now be diagnostics for all cases when a
5284 control that does not make sense is encountered.
5286 9. Added the /retain_sender option to "control=submission".
5288 10. $recipients is now available in the predata ACL (oversight).
5290 11. Tidy the search cache before the fork to do a delivery from a message
5291 received from the command line. Otherwise the child will trigger a lookup
5292 failure and thereby defer the delivery if it tries to use (for example) a
5293 cached ldap connection that the parent has called unbind on.
5295 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5296 of $address_data from the recipient verification was clobbered by the
5297 sender verification.
5299 13. The value of address_data from a sender verification is now available in
5300 $sender_address_data in subsequent conditions in the ACL statement.
5302 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5304 15. Added a new option "connect=<time>" to callout options, to set a different
5307 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5308 was its contents. (It was OK if the option was not defined at all.)
5310 17. A "Completed" log line is now written for messages that are removed from
5311 the spool by the -Mrm option.
5313 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5314 information about exactly what failed.
5316 19. Added -dd to debug only the daemon process.
5318 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5319 handles timeouts, both on the server side and network timeouts. Renamed the
5320 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5322 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5323 It is now set to "smtps".
5325 22. $host_address is now set to the target address during the checking of
5326 ignore_target_hosts.
5328 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5329 being passed; this would have caused $sender_host_name to have been used if
5330 matching the list had actually called for a host name (not very likely,
5331 since this list is usually IP addresses). A host name is now passed as
5334 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5335 code that specifies a non-restarting handler (typically sigaction() in
5336 modern systems) in an attempt to fix a rare and obscure crash bug.
5338 25. Narrowed the window for a race in the daemon that could cause it to ignore
5339 SIGCHLD signals. This is not a major problem, because they are used only to
5340 wake it up if nothing else does.
5342 26. A malformed maildirsize file could cause Exim to calculate negative values
5343 for the mailbox size or file count. Odd effects could occur as a result.
5344 The maildirsize information is now recalculated if the size or filecount
5347 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5348 support for a long time. Removed HAVE_SYS_VFS_H.
5350 28. Installed the latest version of exipick from John Jetmore.
5352 29. In an address list, if the pattern was not a regular expression, an empty
5353 subject address (from a bounce message) matched only if the pattern was an
5354 empty string. Non-empty patterns were not even tested. This was the wrong
5355 because it is perfectly reasonable to use an empty address as part of a
5356 database query. An empty address is now tested by patterns that are
5357 lookups. However, all the other forms of pattern expect the subject to
5358 contain a local part and a domain, and therefore, for them, an empty
5359 address still always fails if the pattern is not itself empty.
5361 30. Exim went into a mad DNS loop when attempting to do a callout where the
5362 host was specified on an smtp transport, and looking it up yielded more
5363 than one IP address.
5365 31. Re-factored the code for checking spool and log partition space into a
5366 function that finds that data and another that does the check. The former
5367 is then used to implement four new variables: $spool_space, $log_space,
5368 $spool_inodes, and $log_inodes.
5370 32. The RFC2047 encoding function was originally intended for short strings
5371 such as real names; it was not keeping to the 75-character limit for
5372 encoded words that the RFC imposes. It now respects the limit, and
5373 generates multiple encoded words if necessary. To be on the safe side, I
5374 have increased the buffer size for the ${rfc2047: expansion operator from
5377 33. It is now permitted to omit both strings after an "if" condition; if the
5378 condition is true, the result is "true". As before, when the second string
5379 is omitted, a false condition yields an empty string. This makes it less
5380 cumbersome to write custom ACL and router conditions.
5382 34. Failure to deliver a bounce message always caused it to be frozen, even if
5383 there was an errors_to setting on the router. The errors_to setting is now
5386 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5387 canonical form (fully expanded) before being placed in
5388 $sender_host_address.
5390 36. The table in the code that translates DNS record types into text (T_A to
5391 "A" for instance) was missing entries for NS and CNAME. It is just possible
5392 that this could have caused confusion if both these types were looked up
5393 for the same domain, because the text type is used as part of Exim's
5394 per-process caching. But the chance of anyone hitting this buglet seems
5397 37. The dnsdb lookup has been extended in a number of ways.
5399 (1) There is a new type, "zns", which walks up the domain tree until it
5400 finds some nameserver records. It should be used with care.
5402 (2) There is a new type, "mxh", which is like "mx" except that it returns
5403 just the host names, not the priorities.
5405 (3) It is now possible to give a list of domains (or IP addresses) to be
5406 looked up. The behaviour when one of the lookups defers can be
5407 controlled by a keyword.
5409 (4) It is now possible to specify the separator character for use when
5410 multiple records are returned.
5412 38. The dnslists ACL condition has been extended: it is now possible to supply
5413 a list of IP addresses and/or domains to be looked up in a particular DNS
5416 39. Added log_selector=+queue_time_overall.
5418 40. When running the queue in the test harness, wait just a tad after forking a
5419 delivery process, to get repeatability of debugging output.
5421 41. Include certificate and key file names in error message when GnuTLS fails
5422 to set them up, because the GnuTLS error message doesn't include the name
5423 of the failing file when there is a problem reading it.
5425 42. Allow both -bf and -bF in the same test run.
5427 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5429 44. The "Exiscan patch" is now merged into the mainline Exim source.
5431 45. Sometimes the final signoff response after QUIT could fail to get
5432 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5433 < 0 before doing a fflush(). This bug looks as though it goes back to the
5434 introduction of TLS in release 3.20, but "sometimes" must have been rare
5435 because the tests only now provoked it.
5437 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5438 (this can affect the format of dates).
5440 47. exim_tidydb, when checking for the continued existence of a message for
5441 which it has found a message-specific retry record, was not finding
5442 messages that were in split spool directories. Consequently, it was
5443 deleting retry records that should have stayed in existence.
5445 48. Steve fixed some bugs in eximstats.
5447 49. The SPA authentication driver was not abandoning authentication and moving
5448 on to the next authenticator when an expansion was forced to fail,
5449 contradicting the general specification for all authenticators. Instead it
5450 was generating a temporary error. It now behaves as specified.
5452 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5453 (the order specifies the preference for clients). The order is now AES256,
5454 AES128, 3DES, ARCFOUR128.
5456 51. Small patch to Sieve code - explicitly set From: when generating an
5459 52. Exim crashed if a remote delivery caused a very long error message to be
5460 recorded - for instance if somebody sent an entire SpamAssassin report back
5461 as a large number of 550 error lines. This bug was coincidentally fixed by
5462 increasing the size of one of Exim's internal buffers (big_buffer) that
5463 happened as part of the Exiscan merge. However, to be on the safe side, I
5464 have made the code more robust (and fixed the comments that describe what
5467 53. Now that there can be additional text after "Completed" in log lines (if
5468 the queue_time_overall log selector is set), a one-byte patch to exigrep
5469 was needed to allow it to recognize "Completed" as not the last thing in
5472 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5473 patch that reportedly fixes this has been added. I am not expert enough to
5474 create a test for it. This is what the patch creator wrote:
5476 "I found a little strange behaviour of ldap code when working with
5477 Windows 2003 AD Domain, where users was placed in more than one
5478 Organization Units. When I tried to give exim partial DN, the exit code
5479 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5480 But simultaneously result of request was absolutely normal ldap result,
5481 so I produce this patch..."
5483 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5484 REFERENCE, so I have modified the code to exclude the patch when that macro
5487 55. Some experimental protocols are using DNS PTR records for new purposes. The
5488 keys for these records are domain names, not reversed IP addresses. The
5489 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5490 leaves it alone. Component reversal etc. now happens only for IP addresses.
5493 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5495 57. Double the size of the debug message buffer (to 2048) so that more of very
5496 long debug lines gets shown.
5498 58. The exicyclog utility now does better if the number of log files to keep
5499 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5501 59. Two changes related to the smtp_active_hostname option:
5503 (1) $smtp_active_hostname is now available as a variable.
5504 (2) The default for smtp_banner uses $smtp_active_hostname instead
5505 of $primary_hostname.
5507 60. The host_aton() function is supposed to be passed a string that is known
5508 to be a valid IP address. However, in the case of IPv6 addresses, it was
5509 not checking this. This is a hostage to fortune. Exim now panics and dies
5510 if the condition is not met. A case was found where this could be provoked
5511 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5512 components; fortuitously, this particular loophole had already been fixed
5513 by change 4.50/55 above.
5515 If there are any other similar loopholes, the new check in host_aton()
5516 itself should stop them being exploited. The report I received stated that
5517 data on the command line could provoke the exploit when Exim was running as
5518 exim, but did not say which command line option was involved. All I could
5519 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5520 running as the user.
5523 61. There was a buffer overflow vulnerability in the SPA authentication code
5524 (which came originally from the Samba project). I have added a test to the
5525 spa_base64_to_bits() function which I hope fixes it.
5528 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5529 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5531 63. The daemon start-up calls getloadavg() while still root for those OS that
5532 need the first call to be done as root, but it missed one case: when
5533 deliver_queue_load_max is set with deliver_drop_privilege. This is
5534 necessary for the benefit of the queue runner, because there is no re-exec
5535 when deliver_drop_privilege is set.
5537 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5538 This has been fixed.
5540 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5541 was in use, was not putting the data itself into the right store pool;
5542 consequently, it could be overwritten for a subsequent message in the same
5543 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5546 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5548 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5549 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5550 the function were treating the return as a boolean value, which happened to
5551 work because 0=false and not-0=true, but is not correct code.
5553 68. The host_aton() function was not handling scoped IPv6 addresses (those
5554 with, for example, "%eth0" on the end) correctly.
5556 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5557 negated items (that is, ~something) in unsigned ints. Some compilers
5558 apparently mutter when there is no cast.
5560 70. If an address verification called from an ACL failed, and did not produce a
5561 user-specific message (i.e. there was only a "system" message), nothing was
5562 put in $acl_verify_message. In this situation, it now puts the system
5565 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5566 session; change 4.31/43 added the unwanted input to the log line - except
5567 that it did not do this in the start of session case. It now does.
5569 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5570 This is wrong and can cause the other end to generate a synchronization
5571 error if it is another Exim or anything else that does the synchronization
5572 check. A QUIT command is no longer sent after a timeout.
5574 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5575 during host lookups.
5577 74. The defer_ok option of callout verification was not working if it was used
5578 when verifying addresses in header lines, that is, for this case:
5580 verify = header_sender/callout=defer_ok
5582 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5583 those file descriptors could be used for SMTP connections. If anything
5584 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5585 could be sent to the SMTP client, causing chaos. The daemon now opens
5586 stdin, stdout, and stderr to /dev/null when it puts itself into the
5589 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5590 log by default. The user can override this with suitable Perl magic.
5592 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5593 the log message when discard triggers, was not working for the DATA ACL or
5594 for the non-SMTP ACL.
5596 78. Error message wording change in sieve.c.
5598 79. If smtp_accept_max_per_host was set, the number of connections could be
5599 restricted to fewer than expected, because the daemon was trying to set up
5600 a new connection before checking whether the processes handling previous
5601 connections had finished. The check for completed processes is now done
5602 earlier. On busy systems, this bug wouldn't be noticed because something
5603 else would have woken the daemon, and it would have reaped the completed
5606 80. If a message was submitted locally by a user whose login name contained one
5607 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5608 It caused a spool format error. I have fixed the spool reading code. A
5609 related problem was that the "from" clause in the Received: line became
5610 illegal because of the space(s). It is now covered by ${quote_local_part.
5612 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5615 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5617 83. Patch from Sieve maintainer to fix unterminated string problem in
5618 "vacation" handling.
5620 84. Some minor changes to the Linux configuration files to help with other
5621 OS variants using glibc.
5623 85. One more patch for Sieve to update vacation handling to latest spec.
5626 ----------------------------------------------------
5627 See the note above about the 4.44 and 4.50 releases.
5628 ----------------------------------------------------
5634 1. Change 4.43/35 introduced a bug that caused file counts to be
5635 incorrectly computed when quota_filecount was set in an appendfile
5638 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5639 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5642 3. Give more explanation in the error message when the command for a transport
5643 filter fails to execute.
5645 4. There are several places where Exim runs a non-Exim command in a
5646 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5647 was being done only for the command run by the queryprogram router. It is
5648 now done for all such subprocesses. The other cases are: ${run, transport
5649 filters, and the commands run by the lmtp and pipe transports.
5651 5. Some older OS have a limit of 256 on the maximum number of file
5652 descriptors. Exim was using setrlimit() to set 1000 as a large value
5653 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5654 systems. I've change it so that if it can't get 1000, it tries for 256.
5656 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5657 was an oversight, and furthermore, ever since the addition of extra
5658 controls (e.g. 4.43/32), the checks on when to allow different forms of
5659 "control" were broken. There should now be diagnostics for all cases when a
5660 control that does not make sense is encountered.
5662 7. $recipients is now available in the predata ACL (oversight).
5664 8. Tidy the search cache before the fork to do a delivery from a message
5665 received from the command line. Otherwise the child will trigger a lookup
5666 failure and thereby defer the delivery if it tries to use (for example) a
5667 cached ldap connection that the parent has called unbind on.
5669 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5670 of $address_data from the recipient verification was clobbered by the
5671 sender verification.
5673 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5674 was its contents. (It was OK if the option was not defined at all.)
5676 11. A "Completed" log line is now written for messages that are removed from
5677 the spool by the -Mrm option.
5679 12. $host_address is now set to the target address during the checking of
5680 ignore_target_hosts.
5682 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5683 being passed; this would have caused $sender_host_name to have been used if
5684 matching the list had actually called for a host name (not very likely,
5685 since this list is usually IP addresses). A host name is now passed as
5688 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5689 code that specifies a non-restarting handler (typically sigaction() in
5690 modern systems) in an attempt to fix a rare and obscure crash bug.
5692 15. Narrowed the window for a race in the daemon that could cause it to ignore
5693 SIGCHLD signals. This is not a major problem, because they are used only to
5694 wake it up if nothing else does.
5696 16. A malformed maildirsize file could cause Exim to calculate negative values
5697 for the mailbox size or file count. Odd effects could occur as a result.
5698 The maildirsize information is now recalculated if the size or filecount
5701 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5702 support for a long time. Removed HAVE_SYS_VFS_H.
5704 18. Updated exipick to current release from John Jetmore.
5706 19. Allow an empty sender to be matched against a lookup in an address list.
5707 Previously the only cases considered were a regular expression, or an
5710 20. Exim went into a mad DNS lookup loop when doing a callout where the
5711 host was specified on the transport, if the DNS lookup yielded more than
5714 21. The RFC2047 encoding function was originally intended for short strings
5715 such as real names; it was not keeping to the 75-character limit for
5716 encoded words that the RFC imposes. It now respects the limit, and
5717 generates multiple encoded words if necessary. To be on the safe side, I
5718 have increased the buffer size for the ${rfc2047: expansion operator from
5721 22. Failure to deliver a bounce message always caused it to be frozen, even if
5722 there was an errors_to setting on the router. The errors_to setting is now
5725 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5726 canonical form (fully expanded) before being placed in
5727 $sender_host_address.
5729 24. Updated eximstats to version 1.33
5731 25. Include certificate and key file names in error message when GnuTLS fails
5732 to set them up, because the GnuTLS error message doesn't include the name
5733 of the failing file when there is a problem reading it.
5735 26. Expand error message when OpenSSL has problems setting up cert/key files.
5738 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5739 (this can affect the format of dates).
5741 28. exim_tidydb, when checking for the continued existence of a message for
5742 which it has found a message-specific retry record, was not finding
5743 messages that were in split spool directories. Consequently, it was
5744 deleting retry records that should have stayed in existence.
5746 29. eximstats updated to version 1.35
5747 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5748 1.35 - bugfix such that pie charts by volume are generated correctly
5750 30. The SPA authentication driver was not abandoning authentication and moving
5751 on to the next authenticator when an expansion was forced to fail,
5752 contradicting the general specification for all authenticators. Instead it
5753 was generating a temporary error. It now behaves as specified.
5755 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5756 (the order specifies the preference for clients). The order is now AES256,
5757 AES128, 3DES, ARCFOUR128.
5759 31. Small patch to Sieve code - explicitly set From: when generating an
5762 32. Exim crashed if a remote delivery caused a very long error message to be
5763 recorded - for instance if somebody sent an entire SpamAssassin report back
5764 as a large number of 550 error lines. This bug was coincidentally fixed by
5765 increasing the size of one of Exim's internal buffers (big_buffer) that
5766 happened as part of the Exiscan merge. However, to be on the safe side, I
5767 have made the code more robust (and fixed the comments that describe what
5770 33. Some experimental protocols are using DNS PTR records for new purposes. The
5771 keys for these records are domain names, not reversed IP addresses. The
5772 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5773 leaves it alone. Component reversal etc. now happens only for IP addresses.
5776 34. The host_aton() function is supposed to be passed a string that is known
5777 to be a valid IP address. However, in the case of IPv6 addresses, it was
5778 not checking this. This is a hostage to fortune. Exim now panics and dies
5779 if the condition is not met. A case was found where this could be provoked
5780 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5781 components; fortuitously, this particular loophole had already been fixed
5782 by change 4.50/55 or 4.44/33 above.
5784 If there are any other similar loopholes, the new check in host_aton()
5785 itself should stop them being exploited. The report I received stated that
5786 data on the command line could provoke the exploit when Exim was running as
5787 exim, but did not say which command line option was involved. All I could
5788 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5789 running as the user.
5792 35. There was a buffer overflow vulnerability in the SPA authentication code
5793 (which came originally from the Samba project). I have added a test to the
5794 spa_base64_to_bits() function which I hope fixes it.
5797 36. The daemon start-up calls getloadavg() while still root for those OS that
5798 need the first call to be done as root, but it missed one case: when
5799 deliver_queue_load_max is set with deliver_drop_privilege. This is
5800 necessary for the benefit of the queue runner, because there is no re-exec
5801 when deliver_drop_privilege is set.
5803 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5804 was in use, was not putting the data itself into the right store pool;
5805 consequently, it could be overwritten for a subsequent message in the same
5806 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5809 38. Sometimes the final signoff response after QUIT could fail to get
5810 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5811 < 0 before doing a fflush(). This bug looks as though it goes back to the
5812 introduction of TLS in release 3.20, but "sometimes" must have been rare
5813 because the tests only now provoked it.
5819 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5820 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5821 Now it returns an integer. A number of calls were still expecting a T/F
5822 return. Fortuitously, in all cases, the tests worked in OK situations,
5823 which is the norm. However, things would have gone wrong on any write
5824 failures on the smtp file descriptor. This function is used when sending
5825 messages over SMTP and also when doing verify callouts.
5827 2. When Exim is called to do synchronous delivery of a locally submitted
5828 message (the -odf or -odi options), it no longer closes stderr before doing
5831 3. Implemented the mua_wrapper option.
5833 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5835 5. Implemented the functions header_remove(), header_testname(),
5836 header_add_at_position(), and receive_remove_recipient(), and exported them
5839 6. If an ACL "warn" statement specified the addition of headers, Exim already
5840 inserted X-ACL-Warn: at the start if there was no header name. However, it
5841 was not making this test for the second and subsequent header lines if
5842 there were newlines in the string. This meant that an invalid header could
5843 be inserted if Exim was badly configured.
5845 7. Allow an ACL "warn" statement to add header lines at the start or after all
5846 the Received: headers, as well as at the end.
5848 8. Added the rcpt_4xx retry error code.
5850 9. Added postmaster_mailfrom=xxx to callout verification option.
5852 10. Added mailfrom=xxxx to the callout verification option, for verify=
5855 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5856 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5858 12. Inserted some casts to stop certain compilers warning when using pointer
5859 differences as field lengths or precisions in printf-type calls (mostly
5860 affecting debugging statements).
5862 13. Added optional readline() support for -be (dynamically loaded).
5864 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5865 same clock tick as a message's arrival, so that its received time was the
5866 same as the "first fail" time on the retry record, and that message
5867 remained on the queue past the ultimate address timeout, every queue runner
5868 would try a delivery (because it was past the ultimate address timeout) but
5869 after another failure, the ultimate address timeout, which should have then
5870 bounced the address, did not kick in. This was a "< instead of <=" error;
5871 in most cases the first failure would have been in the next clock tick
5872 after the received time, and all would be well.
5874 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5875 being recognized when the domain list was tested by the match_domain
5876 condition in an expansion string.
5878 16. Added the ${str2b64: operator.
5880 17. Exim was always calling setrlimit() to set a large limit for the number of
5881 processes, without checking whether the existing limit was already
5882 adequate. (It did check for the limit on file descriptors.) Furthermore,
5883 errors from getrlimit() and setrlimit() were being ignored. Now they are
5884 logged to the main and panic logs, but Exim does carry on, to try to do its
5885 job under whatever limits there are.
5887 18. Imported PCRE 5.0.
5889 19. Trivial typo in log message " temporarily refused connection" (the leading
5892 20. If the log selector return_path_on_delivery was set and an address was
5893 redirected to /dev/null, the delivery process crashed because it assumed
5894 that a return path would always be set for a "successful" delivery. In this
5895 case, the whole delivery is bypassed as an optimization, and therefore no
5898 21. Internal re-arrangement: the function for sending a challenge and reading
5899 a response while authentication was assuming a zero-terminated challenge
5900 string. It's now changed to take a pointer and a length, to allow for
5901 binary data in such strings.
5903 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5905 23. Exim was not respecting finduser_retries when seeking the login of the
5906 uid under which it was called; it was always trying 10 times. (The default
5907 setting of finduser_retries is zero.) Also, it was sleeping after the final
5908 failure, which is pointless.
5910 24. Implemented tls_on_connect_ports.
5912 25. Implemented acl_smtp_predata.
5914 26. If the domain in control=submission is set empty, Exim assumes that the
5915 authenticated id is a complete email address when it generates From: or
5916 Sender: header lines.
5918 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5919 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5920 chown and chgrp in /bin and hostname in /usr/bin.
5922 28. Exim was keeping the "process log" file open after each use, just as it
5923 does for the main log. This opens the possibility of it remaining open for
5924 long periods when the USR1 signal hits a daemon. Occasional processlog
5925 errors were reported, that could have been caused by this. Anyway, it seems
5926 much more sensible not to leave this file open at all, so that is what now
5929 29. The long-running daemon process does not normally write to the log once it
5930 has entered its main loop, and it closes the log before doing so. This is
5931 so that log files can straightforwardly be renamed and moved. However,
5932 there are a couple of unusual error situations where the daemon does write
5933 log entries, and I had neglected to close the log afterwards.
5935 30. The text of an SMTP error response that was received during a remote
5936 delivery was being truncated at 512 bytes. This is too short for some of
5937 the long messages that one sometimes sees. I've increased the limit to
5940 31. It is now possible to make retry rules that apply only when a message has a
5941 specific sender, in particular, an empty sender.
5943 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5944 it possible to be selective about when SMTP synchronization is enforced.
5946 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5948 32. Implemented hosts_connection_nolog.
5950 33. Added an ACL for QUIT.
5952 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5955 35. Added mailbox_size and mailbox_filecount to appendfile.
5957 36. Added control = no_multiline_responses to ACLs.
5959 37. There was a bug in the logic of the code that waits for the clock to tick
5960 in the case where the clock went backwards by a substantial amount such
5961 that the microsecond fraction of "now" was more than the microsecond
5962 fraction of "then" (but the whole seconds number was less).
5964 38. Added support for the libradius Radius client library this is found on
5965 FreeBSD (previously only the radiusclient library was supported).
5971 1. When certain lookups returned multiple values in the form name=value, the
5972 quoting of the values was not always being done properly. Specifically:
5973 (a) If the value started with a double quote, but contained no whitespace,
5975 (b) If the value contained whitespace other than a space character (i.e.
5976 tabs or newlines or carriage returns) it was not quoted.
5977 This fix has been applied to the mysql and pgsql lookups by writing a
5978 separate quoting function and calling it from the lookup code. The fix
5979 should probably also be applied to nisplus, ibase and oracle lookups, but
5980 since I cannot test any of those, I have not disturbed their existing code.
5982 2. A hit in the callout cache for a specific address caused a log line with no
5983 reason for rejecting RCPT. Now it says "Previous (cached) callout
5984 verification failure".
5986 3. There was an off-by-one bug in the queryprogram router. An over-long
5987 return line was truncated at 256 instead of 255 characters, thereby
5988 overflowing its buffer with the terminating zero. As well as fixing this, I
5989 have increased the buffer size to 1024 (and made a note to document this).
5991 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5992 when Exim is waiting for an SMTP response from a remote server, Exim
5993 restarts its select() call on the socket, thereby resetting its timeout.
5994 This is not a problem when such interrupts are rare. Somebody set up a cron
5995 job to run exiwhat every 2 minutes, which is less than the normal select()
5996 timeout (5 or 10 minutes). This meant that the select() timeout never
5997 kicked in because it was always reset. I have fixed this by comparing the
5998 time when an interrupt arrives with the time at the start of the first call
5999 to select(). If more time than the timeout has elapsed, the interrupt is
6000 treated as a timeout.
6002 5. Some internal re-factoring in preparation for the addition of Sieve
6003 extensions (by MH). In particular, the "personal" test is moved to a
6004 separate function, and given an option for scanning Cc: and Bcc: (which is
6005 not set for Exim filters).
6007 6. When Exim created an email address using the login of the caller as the
6008 local part (e.g. when creating a From: or Sender: header line), it was not
6009 quoting the local part when it contained special characters such as @.
6011 7. Installed new OpenBSD configuration files.
6013 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6014 try to make them clearer.
6016 9. Callout options, other than the timeout value, were being ignored when
6017 verifying sender addresses in header lines. For example, when using
6019 verify = header_sender/callout=no_cache
6021 the cache was (incorrectly) being used.
6023 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6024 only the Cygwin environment.
6026 11. When return_path_on_delivery was set as a log selector, if different remote
6027 addresses in the same message used different return paths and parallel
6028 remote delivery occurred, the wrong values would sometimes be logged.
6029 (Whenever a remote delivery process finished, the return path value from
6030 the most recently started remote delivery process was logged.)
6032 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6033 lines when AUTH and/or TLS are in use. This is the "received protocol"
6034 field. Exim used to use "asmtp" for authenticated SMTP, without any
6035 indication (in the protocol name) for TLS use. Now it follows the RFC and
6036 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6037 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6038 names appear in log lines as well as in Received: header lines.
6040 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6041 extensions, and comparison tests, and to fix some bugs.
6043 14. Changes to the "personal" filter test:
6045 (1) The test was buggy in that it was just doing the equivalent of
6046 "contains" tests on header lines. For example, if a user's address was
6047 anne@some.where, the "personal" test would incorrectly be true for
6049 To: susanne@some.where
6051 This test is now done by extracting each address from the header in turn,
6052 and checking the entire address. Other tests that are part of "personal"
6053 are now done using regular expressions (for example, to check local parts
6054 of addresses in From: header lines).
6056 (2) The list of non-personal local parts in From: addresses has been
6057 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6058 taken from the Sieve specification recommendations.
6060 (3) If the message contains any header line starting with "List-" it is
6061 treated as non-personal.
6063 (4) The test for "circular" in the Subject: header line has been removed
6064 because it now seems ill-conceived.
6066 15. Minor typos in src/EDITME comments corrected.
6068 16. Installed latest exipick from John Jetmore.
6070 17. If headers_add on a router specified a text string that was too long for
6071 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6072 of string_sprintf() is now avoided.
6074 18. $message_body_size was not set (it was always zero) when running the DATA
6075 ACL and the local_scan() function.
6077 19. For the "mail" command in an Exim filter, no default was being set for
6078 the once_repeat time, causing a random time value to be used if "once" was
6079 specified. (If the value happened to be <= 0, no repeat happened.) The
6080 default is now 0s, meaning "never repeat". The "vacation" command was OK
6081 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6082 (I found it when inspecting the code).
6084 20. There is now an overall timeout for performing a callout verification. It
6085 defaults to 4 times the callout timeout, which applies to individual SMTP
6086 commands during the callout. The overall timeout applies when there is more
6087 than one host that can be tried. The timeout is checked before trying the
6088 next host. This prevents very long delays if there are a large number of
6089 hosts and all are timing out (e.g. when the network connections are timing
6090 out). The value of the overall timeout can be changed by specifying an
6091 additional sub-option for "callout", called "maxwait". For example:
6093 verify = sender/callout=5s,maxwait=20s
6095 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6096 to the end before writing, but this should make it even safer).
6098 22. Exim was forgetting that it had advertised PIPELINING for the second and
6099 subsequent messages on an SMTP connection. It was also not resetting its
6100 memory on STARTTLS and an internal HELO.
6102 23. When Exim logs an SMTP synchronization error within a session, it now
6103 records whether PIPELINING has been advertised or not.
6105 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6106 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6107 rather than long int.
6109 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6111 26. Added the never_mail option to autoreply.
6117 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6118 crash if the getsockname() call failed; this can happen if a connection is
6119 closed very soon after it is established. The problem was simply in the
6120 order in which certain operations were done, causing Exim to try to write
6121 to the SMTP stream before it had set up the file descriptor. The bug has
6122 been fixed by making things happen in the correct order.
6128 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6129 before the connection was closed, thus losing the rejection response.
6131 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6132 some early Solaris releases, but causes trouble in current releases where
6133 socklen_t is defined.
6135 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6138 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6141 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6142 that releasing the top of it at the end releases what was used for sub-
6143 expansions (unless the block got too big). However, discard this block if
6144 the first thing is a variable or header, so that we can use its block when
6145 it is dynamic (useful for very large $message_headers, for example).
6147 6. Lookups now cache *every* query, not just the most recent. A new, separate
6148 store pool is used for this. It can be recovered when all lookup caches are
6149 flushed. Lookups now release memory at the end of their result strings.
6150 This has involved some general refactoring of the lookup sources.
6152 7. Some code has been added to the store_xxx() functions to reduce the amount
6153 of flapping under certain conditions.
6155 8. log_incoming_interface used to affect only the <= reception log lines. Now
6156 it causes the local interface and port to be added to several more SMTP log
6157 lines, for example "SMTP connection from", and rejection lines.
6159 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6161 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6163 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6164 could be overwritten at the end of the current message (or the start of a
6165 new message if it was set in a HELO ACL). The value is now preserved for
6166 the duration of the SMTP connection.
6168 12. If a transport had a headers_rewrite setting, and a matching header line
6169 contained an unqualified address, that address was qualified, even if it
6170 did not match any rewriting rules. The underlying bug was that the values
6171 of the flags that permit the existence of unqualified sender and recipient
6172 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6173 non-local messages, and by -bnq for local messages) were not being
6174 preserved with the message after it was received.
6176 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6177 "next input=" as part of the text comprising the host identity instead of
6178 the correct text. The code was using the same buffer for two different
6179 strings. However, depending on which order the printing function evaluated
6180 its arguments, the bug did not always show up. Under Linux, for example, my
6181 test suite worked just fine.
6183 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6184 doesn't work with some older versions of Perl. It has been changed to "my",
6185 which in any case is probably the better facility to use.
6187 15. A really picky compiler found some instances of statements for creating
6188 error messages that either had too many or two few arguments for the format
6191 16. The size of the buffer for calls to the DNS resolver has been increased
6192 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6193 for addresses that have a lot of PTR records. This alleviates a problem; it
6194 does not fully solve it.
6196 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6197 buffer now truncates the list and logs the incident, which is the same
6198 action as happens when Exim is looking up a host name and its aliases.
6199 Previously in this situation something unpredictable would happen;
6200 sometimes it was "internal error: store_reset failed".
6202 18. If a server dropped the connection unexpectedly when an Exim client was
6203 using GnuTLS and trying to read a response, the client delivery process
6204 crashed while trying to generate an error log message.
6206 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6207 string, for example:
6209 warn message = H1: something\nH2: something
6211 the text was added as a single header line from Exim's point of view
6212 though it ended up OK in the delivered message. However, searching for the
6213 second and subsequent header lines using $h_h2: did not work. This has been
6214 fixed. Similarly, if a system filter added multiple headers in this way,
6215 the routers could not see them.
6217 20. Expanded the error message when iplsearch is called with an invalid key to
6218 suggest using net-iplsearch in a host list.
6220 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6221 ACLs are no longer actually imposed (and a message to that effect is
6224 22. If a "gecos" field in a passwd entry contained escaped characters, in
6225 particular, if it contained a \" sequence, Exim got it wrong when building
6226 a From: or a Sender: header from that name. A second bug also caused
6227 incorrect handling when an unquoted " was present following a character
6228 that needed quoting.
6230 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6231 was not being matched caselessly.
6233 24. Arranged for all hyphens in the exim.8 source to be escaped with
6236 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6237 properly. Recipient callout cache records were still being keyed to include
6238 the sender, even when use_sender was set false. This led to far more
6239 callouts that were necessary. The sender is no longer included in the key
6240 when use_sender is false.
6242 26. Added "control = submission" modifier to ACLs.
6244 27. Added the ${base62d: operator to decode base 62 numbers.
6246 28. dnsdb lookups can now access SRV records.
6248 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6249 the configuration file.
6251 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6252 (-v) mode. This makes the output for a verbose queue run more intelligible.
6254 31. Added a use_postmaster feature to recipient callouts.
6256 32. Added the $body_zerocount variable, containing the number of binary zero
6257 bytes in the message body.
6259 33. The time of last modification of the "new" subdirectory is now used as the
6260 "mailbox time last read" when there is a quota error for a maildir
6263 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6265 35. Added +ignore_unknown as a special item in host lists.
6267 36. Code for decoding IPv6 addresses in host lists is now included, even if
6268 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6269 address was recognized as an IP address, but was then not correctly decoded
6270 into binary, causing unexpected and incorrect effects when compared with
6277 1. Very minor rewording of debugging text in manualroute to say "list of
6278 hosts" instead of "hostlist".
6280 2. If verify=header_syntax was set, and a header line with an unqualified
6281 address (no domain) and a large number of spaces between the end of the
6282 name and the colon was received, the reception process suffered a buffer
6283 overflow, and (when I tested it) crashed. This was caused by some obsolete
6284 code that should have been removed. The fix is to remove it!
6286 3. When running in the test harness, delay a bit after writing a bounce
6287 message to get a bit more predictability in the log output.
6289 4. Added a call to search_tidyup() just before forking a reception process. In
6290 theory, someone could use a lookup in the expansion of smtp_accept_max_
6291 per_host which, without the tidyup, could leave open a database connection.
6293 5. Added the variables $recipient_data and $sender_data which get set from a
6294 lookup success in an ACL "recipients" or "senders" condition, or a router
6295 "senders" option, similar to $domain_data and $local_part_data.
6297 6. Moved the writing of debug_print from before to after the "senders" test
6300 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6301 problems for message scanning, either using a data ACL, or using
6302 local_scan() because the Received: header was not generated till after they
6303 were called (in order to set the time as the time of reception completion).
6304 I have revised the way this works. The header is now generated after the
6305 body is received, but before the ACL or local_scan() are called. After they
6306 are run, the timestamp in the header is updated.
6312 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6313 before starting a queue runner without re-exec. This happened only when
6314 deliver_drop_privilege was set or when the Exim user was set to root. The
6315 effect of the bug was that timeouts during subsequent deliveries caused
6316 crashes instead of being properly handled. The handler is now left at its
6317 default (and expected) setting.
6319 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6320 message, again when deliver_drop_privilege is set or Exim is run as root.
6321 The bug described in (1) was not present in this case, but the tidying up
6322 of the other signals was missing. I have made the two cases consistent.
6324 3. The ignore_target_hosts setting on a manualroute router was being ignored
6325 for hosts that were looked up using the /MX notation.
6327 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6330 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6331 operated on the sender address. After changing the $sender_address to <>
6332 for the sender address verify, Exim was re-instated it as the original
6333 (before rewriting) address, but remembering that it had rewritten it, so it
6334 wasn't rewriting it again. This bug also had the effect of breaking the
6335 sender address verification caching when the sender address was rewritten.
6337 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6338 This has been changed so that if the ip literal address matches
6339 ignore_target_hosts, the router declines.
6341 7. Added expansion conditions match_domain, match_address, and match_local_
6342 part (NOT match_host).
6344 8. The placeholder for the Received: header didn't have a length field set.
6346 9. Added code to Exim itself and to exim_lock to test for a specific race
6347 condition that could lead to file corruption when using MBX delivery. The
6348 issue is with the lockfile that is created in /tmp. If this file is removed
6349 after a process has opened it but before that process has acquired a lock,
6350 there is the potential for a second process to recreate the file and also
6351 acquire a lock. This could lead to two Exim processes writing to the file
6352 at the same time. The added code performs the same test as UW imapd; it
6353 checks after acquiring the lock that its file descriptor still refers to
6354 the same named file.
6356 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6357 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6360 11. Added the smtp_active_hostname option. If used, this will typically be made
6361 to depend on the incoming interface address. Because $interface_address is
6362 not set up until the daemon has forked a reception process, error responses
6363 that can happen earlier (such as "too many connections") no longer contain
6366 12. If an expansion in a condition on a "warn" statement fails because a lookup
6367 defers, the "warn" statement is abandoned, and the next ACL statement is
6368 processed. Previously this caused the whole ACL to be aborted.
6370 13. Added the iplsearch lookup type.
6372 14. Added ident_timeout as a log selector.
6374 15. Added tls_certificate_verified as a log selector.
6376 16. Added a global option tls_require_ciphers (compare the smtp transport
6377 option of the same name). This controls incoming TLS connections.
6379 17. I finally figured out how to make tls_require_ciphers do a similar thing
6380 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6381 before starting the TLS session.
6383 18. Tabs are now shown as \t in -bP output.
6385 19. If the log selector return_path_on_delivery was set, Exim crashed when
6386 bouncing a message because it had too many Received: header lines.
6388 20. If two routers both had headers_remove settings, and the first one included
6389 a superfluous trailing colon, the final name in the first list and the
6390 first name in the second list were incorrectly joined into one item (with a
6391 colon in the middle).
6397 1. Added -C and -D options to the exinext utility, mainly to make it easier
6398 to include in the automated testing, but these could be helpful when
6399 multiple configurations are in use.
6401 2. The exinext utility was not formatting the output nicely when there was
6402 an alternate port involved in the retry record key, nor when there was a
6403 message id as well (for retries that were specific to a specific message
6404 and a specific host). It was also confused by IPv6 addresses, because of
6405 the additional colons they contain. I have fixed the IPv4 problem, and
6406 patched it up to do a reasonable job for IPv6.
6408 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6409 delivery, the log line now contains "pipelined" if PIPELINING was used.
6411 4. An SMTP transport process used to panic and die if the bind() call to set
6412 an explicit outgoing interface failed. This has been changed; it is now
6413 treated in the same way as a connect() failure.
6415 5. A reference to $sender_host_name in the part of a conditional expansion
6416 that was being skipped was still causing a DNS lookup. This no longer
6419 6. The def: expansion condition was not recognizing references to header lines
6420 that used bh_ and bheader_.
6422 7. Added the _cache feature to named lists.
6424 8. The code for checking quota_filecount in the appendfile transport was
6425 allowing one more file than it should have been.
6427 9. For compatibility with Sendmail, the command line option
6435 and sets the incoming protocol and host name (for trusted callers). The
6436 host name and its colon can be omitted when only the protocol is to be set.
6437 Note the Exim already has two private options, -pd and -ps, that refer to
6438 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6439 "s", but I don't think that's a major issue.
6441 10. A number of refactoring changes to the code, none of which should affect
6444 (a) The number of logging options was getting close to filling up the
6445 32-bit word that was used as a bit map. I have split them into two classes:
6446 those that are passed in the argument to log_write(), and those that are
6447 only ever tested independently outside of that function. These are now in
6448 separate 32-bit words, so there is plenty of room for expansion again.
6449 There is no change in the user interface or the logging behaviour.
6451 (b) When building, for example, log lines, the code previously used a
6452 macro that called string_cat() twice, in order to add two strings. This is
6453 not really sufficiently general. Furthermore, there was one instance where
6454 it was actually wrong because one of the argument was used twice, and in
6455 one call a function was used. (As it happened, calling the function twice
6456 did not affect the overall behaviour.) The macro has been replaced by a
6457 function that can join an arbitrary number of extra strings onto a growing
6460 (c) The code for expansion conditions now uses a table and a binary chop
6461 instead of a serial search (which was left over from when there were very
6462 few conditions). Also, it now recognizes conditions like "pam" even when
6463 the relevant support is not compiled in: a suitably worded error message is
6464 given if an attempt is made to use such a condition.
6466 11. Added ${time_interval:xxxxx}.
6468 12. A bug was causing one of the ddress fields not to be passed back correctly
6469 from remote delivery subprocesses. The field in question was not being
6470 subsequently used, so this caused to problems in practice.
6472 13. Added new log selectors queue_time and deliver_time.
6474 14. Might have fixed a bug in maildirsizefile handling that threw up
6475 "unexpected character" debug warnings, and recalculated the data
6476 unnecessarily. In any case, I expanded the warning message to give more
6479 15. Added the message "Restricted characters in address" to the statements in
6480 the default ACL that block characters like @ and % in local parts.
6482 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6483 Three changes have been made:
6485 (a) There was a serious bug; a negative response to MAIL caused the whole
6486 recipient domain to be cached as invalid, thereby blocking all messages
6487 to all local parts at the same domain, from all senders. This bug has
6488 been fixed. The domain is no longer cached after a negative response to
6489 MAIL if the sender used is not empty.
6491 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6494 (c) A new callout option, "use_sender" has been added for people who want
6495 the modified behaviour.
6501 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6504 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6505 indeed breaks things for older releases.
6507 3. Added additional logging to the case where there is a problem reading data
6508 from a filter that is running in a subprocess using a pipe, in order to
6509 try to track down a specific problem.
6511 4. Testing facility fudge: when running in the test harness and attempting
6512 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6513 getting "No route to host". Convert this to a timeout.
6515 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6518 6. Some OS don't have socklen_t but use size_t instead. This affects the
6519 fifth argument of getsockopt() amongst other things. This is now
6520 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6521 can be set for individual OS. I have set it for SunOS5, OSF1, and
6522 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6523 some earlier ones do not.
6525 7. Change 4.30/15 was not doing the test caselessly.
6527 8. The standard form for an IPv6 address literal was being rejected by address
6528 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6529 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6530 this, as well as the form without the "IPv6" on the front (but only when
6531 address literals are enabled, of course).
6533 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6535 10. Exim crashed if a message with an empty sender address specified by -f
6536 encountered a router with an errors_to setting. This could be provoked only
6537 by a command such as
6541 where an empty string was supplied; "<>" did not hit this bug.
6543 11. Installed PCRE release 4.5.
6545 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6546 remained set. It is now erased.
6548 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6549 times from message ids (which are base 36 rather than the normal 62).
6551 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6552 were being counted as actual protocol errors, and logged if the log
6553 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6554 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6555 and DATA following a set of rejected RCPTs do not count as protocol errors.
6556 In other words, Exim assumes they were pipelined, though this may not
6557 actually be the case. Of course, in all cases the client gets an
6558 appropriate error code.
6560 15. If a lookup fails in an ACL condition, a message about the failure may
6561 be available; it is used if testing the ACL cannot continue, because most
6562 such messages specify what the cause of the deferral is. However, some
6563 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6564 that caused an old message to be retained and used if a later statement
6565 caused a defer, replacing the real cause of the deferral.
6567 16. If an IP address had so many PTR records that the DNS lookup buffer
6568 was not large enough to hold them, Exim could crash while trying to process
6569 the truncated data. It now detects and logs this case.
6571 17. Further to 4.21/58, another change has been made: if (and only if) the
6572 first line of a message (the first header line) ends with CRLF, a bare LF
6573 in a subsequent header line has a space inserted after it, so as not to
6574 terminate the header.
6576 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6577 unnecessarily, used atoi() instead of strtol(), and didn't check the
6578 termination when getting file sizes from file names by regex.
6580 19. Completely re-implemented the support for maildirsize files, in the light
6581 of a number of problems with the previous contributed implementation
6582 (4.30/29). In particular:
6584 . If the quota is zero, the maildirsize file is maintained, but no quota is
6587 . If the maildir directory does not exist, it is created before any attempt
6588 to write a maildirsize file.
6590 . The quota value in the file is just a cache; if the quota is changed in
6591 the transport, the new value overrides.
6593 . A regular expression is available for excluding directories from the
6596 20. The autoreply transport checks the characters in options that define the
6597 message's headers; it allows continued headers, but it was checking with
6598 isspace() after an embedded newline instead of explicitly looking for a
6601 21. If all the "regular" hosts to which an address was routed had passed their
6602 expiry times, and had not reached their retry times, the address was
6603 bounced, even if fallback hosts were defined. Now Exim should go on to try
6606 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6607 equivalent code in the SMTP transport. Some hosts send humungous responses
6608 to HELO/EHLO, more than 1024 it seems.
6610 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6611 gives compiler warnings in some environments. I've now done it "properly",
6614 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6615 (because of problems with the built-in one) was declared to return uschar *
6616 instead of char *, causing compiler failure.
6618 25. Fixed a file descriptor leak when processing alias/forward files.
6620 26. Fixed a minor format string issue in dbfn.c.
6622 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6624 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6625 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6628 29. When a sender address is verified, it is cached, to save repeating the test
6629 when there is more than one recipient in a message. However, when the
6630 verification involves a callout, it is possible for different callout
6631 options to be set for different recipients. It is too complicated to keep
6632 track of this in the cache, so now Exim always runs a verification when a
6633 callout is required, relying on the callout cache for the optimization.
6634 The overhead is duplication of the address routing, but this should not be
6637 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6638 to be verified with callout=postmaster, and the main callout worked but the
6639 postmaster check failed, the verification correctly failed. However, if a
6640 subsequent RCPT command asked for sender verification *without* the
6641 postmaster check, incorrect caching caused this verification also to fail,
6644 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6645 it was not caching the DNS options (qualify_single, search_parents) that
6646 were used when the lookup failed. A subsequent lookup with different
6647 options therefore always gave the same answer, though there were cases
6648 where it should not have. (Example: a "domains = !$mx_any" option on a
6649 dnslookup router: the "domains" option is always processed without any
6650 widening, but the router might have qualify_single set.) Now Exim uses the
6651 cached value only when the same options are set.
6653 32. Added John Jetmore's "exipick" utility to the distribution.
6655 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6656 than a timeout (e.g. a certificate is required, and is not provided), an
6657 Exim server now closes the connection immediately. Previously it waited for
6658 the client to close - but if the client is SSL, it seems that they each
6659 wait for each other, leading to a delay before one of them times out.
6661 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6662 maintained 0.8.x compatibility because I don't think many are using it, and
6663 it is clearly obsolete.
6665 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6668 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6669 client certificate was expired. A simple patch fixes this, though I don't
6670 understand the full logic of why the verify callback is called multiple
6673 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6674 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6675 which causes problems with some clients (such as the Certicom SSL Plus
6676 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6677 disables the coutermeasure allowing Eudora to connect."
6679 38. Exim was not checking that a write() to a log file succeeded. This could
6680 lead to Bad Things if a log got too big, in particular if it hit a file
6681 size limit. Exim now panics and dies if it cannot write to a log file, just
6682 as it does if it cannot open a log file.
6684 39. Modified OS/Makefile-Linux so that it now contains
6686 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6688 The two -D definitions ensure that Exim is compiled with large file
6689 support, which makes it possible to handle log files that are bigger than
6692 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6693 instance) a domain was checked against a named list that involved a lookup,
6694 causing $domain_data to be set, then another domain was checked against the
6695 same list, then the first domain was re-checked, the value of $domain_data
6696 after the final check could be wrong. In particular, if the second check
6697 failed, it could be set empty. This bug probably also applied to
6700 41. The strip_trailing_dot option was not being applied to the address given
6701 with the -f command-line option.
6703 42. The code for reading a message's header from the spool was incrementing
6704 $received_count, but never initializing it. This meant that the value was
6705 incorrect (doubled) while delivering a message in the same process in which
6706 it was received. In the most common configuration of Exim, this never
6707 happens - a fresh exec is done - but it can happen when
6708 deliver_drop_privilege is set.
6710 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6711 it now includes up to 150 characters of the unexpected data in the log
6714 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6715 and building data strings. The size of both of these buffers was 10 000
6716 bytes - far larger than anybody would *ever* want, thought I. Needless to
6717 say, somebody hit the limit. I have increased the maximum line length to
6718 20 000 and the maximum data length of concatenated lines to 100 000. I have
6719 also fixed two bugs, because there was no checking on these buffers. Tsk,
6720 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6721 buffer is too small.
6723 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6724 lsearch lookups. Now it does.
6726 46. When parsing a route_list item in a manualroute router, a fixed-length
6727 buffer was used for the list of hosts. I made this 1024 bytes long,
6728 thinking that nobody would ever have a list of hosts that long. Wrong.
6729 Somebody had a whole pile of complicated expansion conditions, and the
6730 string was silently truncated, leading to an expansion error. It turns out
6731 that it is easier to change to an unlimited length (owing to other changes
6732 that have happened since this code was originally written) than to build
6733 structure for giving a limitation error. The length of the item that
6734 expands into the list of hosts is now unlimited.
6736 47. The lsearch lookup could not handle data where the length of text line was
6737 more than 4095 characters. Such lines were truncated, leading to shortened
6738 data being returned. It should now handle lines of any length.
6740 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6741 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6744 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6745 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6746 no longer happens in comment lines. A list of replacements is now placed
6747 at the head of all of the source files, except those whose only change is
6748 to replace PERL_COMMAND in the very first #! line.
6750 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6751 messages on the queue, with a bottom-up merge sort, using code contributed
6752 by Michael Haardt. This should make operations like -bp somewhat faster on
6753 large queues. It won't affect queue runners, except when queue_run_in_order
6756 51. Installed eximstats 1.31 in the distribution.
6758 52. Added support for SRV lookups to the dnslookup router.
6760 53. If an ACL referred to $message_body or $message_body_end, the value was not
6761 reset for any messages that followed in the same SMTP session.
6763 54. The store-handling optimization for building very long strings was not
6764 differentiating between the different store pools. I don't think this
6765 actually made any difference in practice, but I've tidied it.
6767 55. While running the routers to verify a sender address, $sender_address
6768 was still set to the sender address. This is wrong, because when routing to
6769 send a bounce to the sender, it would be empty. Therefore, I have changed
6770 it so that, while verifying a sender address, $sender_address is set to <>.
6771 (There is no change to what happens when verifying a recipient address.)
6773 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6774 target A or AAAA records (if not already returned) without resetting the
6775 qualify_single or search_parents options of the DNS resolver. These are
6776 inappropriate in this case because the targets of MX and SRV records must
6777 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6778 target that, when qualified, matched something in the local domain. These
6779 two options are now turned off when doing these lookups.
6781 57. It seems that at least some releases of Reiserfs (which does not have the
6782 concept of a fixed number of inodes) returns zero and not -1 for the
6783 number of available inodes. This interacted badly with check_spool_inodes,
6784 which assumed that -1 was the "no such thing" setting. What I have done is
6785 to check that the total number of inodes is greater than zero before doing
6786 the test of how many are available.
6788 58. When a "warn" ACL statement has a log_message modifier, the message is
6789 remembered, and not repeated. This is to avoid a lot of repetition when a
6790 message has many recipients that cause the same warning to be written.
6791 However, Exim was preserving the list of already written lines for an
6792 entire SMTP session, which doesn't seem right. The memory is now reset if a
6793 new message is started.
6795 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6796 debugging output unless log_rewrite was also set.
6798 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6799 of (int)(handle) when we know that handle contains (void *)(-1).
6801 61. The Exim daemon panic-logs an error return when it closes the incoming
6802 connection. However "connection reset by peer" seems to be common, and
6803 isn't really an error worthy of noting specially, so that particular error
6806 62. When Exim is trying to find all the local interfaces, it used to panic and
6807 die if the ioctl to get the interface flags failed. However, it seems that
6808 on at least one OS (Solaris 9) it is possible to have an interface that is
6809 included in the list of interfaces, but for which you get a failure error
6810 for this call. This happens when the interface is not "plumbed" into a
6811 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6812 failure of the "get flags" call assumes that the interface is down.
6814 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6815 makes life easier for people who are doing arithmetic on fields extracted
6816 from dates, where you often get leading zeros that should not be
6817 interpreted as octal.
6819 64. Added qualify_domain to the redirect router, to override the global
6822 65. If a pathologically long header line contained very many addresses (the
6823 report of this problem mentioned 10 000) and each of them was rewritten,
6824 Exim could use up a very large amount of memory. (It kept on making new
6825 copies of the header line as it rewrote, and never released the old ones.)
6826 At the expense of a bit more processing, the header rewriting function has
6827 been changed so that it no longer eats memory in this way.
6829 66. The generation of the Received: header has been moved from the time that a
6830 message starts to be received, to the time that it finishes. The timestamp
6831 in the Received: header should now be very close to that of the <= log
6832 line. There are two side-effects of this change:
6834 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6835 logged header lines no longer include the local Received: line, because
6836 it has not yet been created. The same applies to a copy of the message
6837 that is returned to a non-SMTP sender when a message is rejected.
6839 (b) When a filter file is tested using -bf, no additional Received: header
6840 is added to the test message. After some thought, I decided that this
6843 This change does not affect the value of $received_for. It is still set
6844 after address rewriting, but before local_scan() is called.
6846 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6848 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6849 gave an unhelpful panic error message, and a defer error. I have managed to
6850 change this behaviour so that it now rejects any supplied certificate,
6851 which seems right, as the list of acceptable certificates is empty.
6853 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6854 gave an unhelpful defer error. I have not managed to make this reject any
6855 supplied certificates, but the error message it gives is "no certificate
6856 supplied", which is not helpful.
6858 70. exigrep's output now also includes lines that are not associated with any
6859 message, but which match the given pattern. Implemented by a patch from
6860 Martin Sluka, which also tidied up the Perl a bit.
6862 71. Recipient callout verification, like sender verification, was using <> in
6863 the MAIL FROM command. This isn't really the right thing, since the actual
6864 sender may affect whether the remote host accepts the recipient or not. I
6865 have changed it to use the actual sender in the callout; this means that
6866 the cache record is now keyed on a recipient/sender pair, not just the
6867 recipient address. There doesn't seem to be a real danger of callout loops,
6868 since a callout by the remote host to check the sender would use <>.
6869 [SEE ABOVE: changed after hitting problems.]
6871 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6872 temporary errors. However, in the case of such a code being given after
6873 the end of a data transmission (i.e. after ".") Exim was failing to write
6874 a retry record for the message. (Yes, there was some broken host that was
6875 actually sending 8xx at this point.)
6877 73. An unknown lookup type in a host list could cause Exim to panic-die when
6878 the list was checked. (An example that provoked this was putting <; in the
6879 middle of a list instead of at the start.) If this happened during a DATA
6880 ACL check, a -D file could be left lying around. This kind of configuration
6881 error no longer causes Exim to die; instead it causes a defer error. The
6882 incident is still logged to the main and panic logs.
6884 74. Buglet left over from Exim 3 conversion. The message "too many messages
6885 in one connection" was written to the rejectlog but not the mainlog, except
6886 when address rewriting (yes!) was being logged.
6888 75. Added write_rejectlog option.
6890 76. When a system filter was run not as root (that is, when system_filter_user
6891 was set), the values of the $n variables were not being returned to the
6892 main process; thus, they were not subsequently available in the $sn
6895 77. Added +return_path_on_delivery log selector.
6897 78. A connection timeout was being treated differently from recipients deferred
6898 when testing hosts_max_try with a message that was older than the host's
6899 retry timeout. (The host should not be counted, thus allowing all hosts to
6900 be tried at least once before bouncing.) This may have been the cause of an
6901 occasionally reported bug whereby a message would remain on the queue
6902 longer than the retry timeout, but would be bounced if a delivery was
6903 forced. I say "may" because I never totally pinned down the problem;
6904 setting up timeout/retry tests is difficult. See also the next item.
6906 79. The ultimate address timeout was not being applied to errors that involved
6907 a combination of host plus message (for example, a timeout on a MAIL
6908 command). When an address resolved to a number of possible hosts, and they
6909 were not all tried for each delivery (e.g. because of hosts_max_try), a
6910 message could remain on the queue longer than the retry timeout.
6912 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6915 81. Fixed an obscure SMTP outgoing bug which required at least the following
6916 conditions: (a) there was another message waiting for the same server;
6917 (b) the server returned 5xx to all RCPT commands in the first message so
6918 that the message was not completed; (c) the server dropped the connection
6919 or gave a negative response to the RSET that Exim sends to abort the
6920 transaction. The observed case was a dropped connection after DATA that had
6921 been sent in pipelining mode. That is, the server had advertised PIPELINING
6922 but was not implementing it correctly. The effect of the bug was incorrect
6923 behaviour, such as trying another host, and this could lead to a crash.
6929 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6930 and daemon.c were passed as pointers to ints; they should have been
6931 pointers to socklen_t variables (which are typically unsigned ints).
6933 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6936 3. Fixed a really odd bug that affected only the testing scheme; patching a
6937 certain fixed string in the binary changed the value of another string that
6938 happened to be identical to the end of the original first string.
6940 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6941 name", it returns that address as the IP address. On some operating
6942 systems (e.g. Solaris), it also passes back the IP address string as the
6943 "host name". However, on others (e.g. Linux), it passes back an empty
6944 string. Exim wasn't checking for this, and was changing the host name to an
6945 empty string, assuming it had been canonicalized.
6947 5. Although rare, it is permitted to have more than one PTR record for a given
6948 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6949 all the names associated with an address, because they do in Solaris.
6950 However, it seems that they do not in Linux for data that comes from the
6951 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6952 I found this out when I moved to a new Linux workstation and tried to run
6953 the Exim test suite.
6955 To get round this problem I have changed the code so that it now does its
6956 own call to the DNS to look up PTR records when searching for a host name.
6957 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6958 addresses that are only in /etc/hosts are still found.
6960 This behaviour is, however, controlled by an option called host_lookup_
6961 order, which defaults to "bydns:byaddr". If people want to use the other
6962 order, or indeed, just use one or the other means of lookup, they can
6963 specify it in this variable.
6965 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6966 some operating systems, this comes back from gethostbyaddr() as an empty
6967 string, and this is what Exim used to test for. However, it seems that in
6968 other systems, "." is yielded. Exim now tests for this case too.
6970 7. The values of check_spool_space and check_log_space are now held internally
6971 as a number of kilobytes instead of an absolute number of bytes. If a
6972 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6973 kilobyte. This means that much larger values can be stored.
6975 8. Exim monitor: an attempt to get the action menu when not actually pointing
6976 at a message produces an empty menu entitled "No message selected". This
6977 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6978 no entries in it ("Shell widget menu has zero width and/or height"). So I
6979 have added a single, blank menu entry in this case.
6981 9. Added ${quote_local_part.
6983 10. MIME decoding is now applied to the contents of Subject: header lines when
6986 11. Now that a reference to $sender_host_address automatically causes a reverse
6987 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6988 host lookup before query-style lookups in lists that might use this
6989 variable. This has therefore been abolished, and the "net-" prefix is no
6990 longer necessary for query-style lookups.
6992 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6993 have been a typo for LFLAGS, so it has been changed.
6995 13. The install script calls Exim with "-C /dev/null" in order to find the
6996 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6997 to be output. However, since Exim outputs its version number before the
6998 error, it didn't break the script. It just looked ugly. I fixed this by
6999 always allowing "-C /dev/null" if the caller is root.
7001 14. Ignore overlarge ACL variable number when reading spool file - insurance
7002 against a later release with more variables having written the file.
7004 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7005 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7006 this, as well as the form without the "IPv6" on the front.
7008 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7009 OS/Makefile-Darwin file.
7011 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7012 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7014 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7015 variable. However, some OS use ints for inodes. I've added cast to long int
7016 to get rid of the compiler warning.
7018 19. I had forgotten to lock out "/../" in configuration file names when
7019 ALT_CONFIG_PREFIX was set.
7021 20. Routers used for verification do not need to specify transports. However,
7022 if such a router generated a host list, and callout was configured, Exim
7023 crashed, because it could not find a port number from the (non-existent)
7024 transport. It now assumes port 25 in this circumstance.
7026 21. Added the -t option to exigrep.
7028 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7029 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7030 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7031 them is set, LOOKUP_LSEARCH is forced.
7033 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7035 24. Added sender and host information to the "rejected by local_scan()" log
7036 line; previously there was no indication of these.
7038 25. Added .include_if_exists.
7040 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7041 Linux. It turns out that not all file systems support this. Apparently some
7042 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7043 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7044 not supported on the file descriptor, is now ignored when Exim is trying to
7045 sync a directory. This applies only to Linux.
7047 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7049 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7050 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7053 29. Added support for maildirsize files from supplied patch (modified a bit).
7055 30. The use of :fail: followed by an empty string could lead Exim to respond to
7056 sender verification failures with (e.g.):
7058 550 Verification failed for <xxx>
7059 550 Sender verify failed
7061 where the first response line was missing the '-' that indicates it is not
7062 the final line of the response.
7064 31. The loop for finding the name of the user that called Exim had a hardwired
7065 limit of 10; it now uses the value of finduser_retries, which is used for
7066 all other user lookups.
7068 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7071 33. Exim was neglecting to zero errno before one call of strtol() when
7072 expanding a string and expecting an integer value. On some systems this
7073 resulted in spurious "integer overflow" errors. Also, it was casting the
7074 result into an int without checking.
7076 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7077 did not work. The code looks as if it has *never* worked, though it appears
7078 to have been documented since at least release 1.62. I have made it work.
7080 35. The "timeout_DNS" error in retry rules, also documented since at least
7081 1.62, also never worked. As it isn't clear exactly what this means, and
7082 clearly it isn't a major issue, I have abolished the feature by treating it
7083 as "timeout", and writing a warning to the main and panic logs.
7085 36. The display of retry rules for -brt wasn't always showing the error code
7088 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7089 timeout_connect_A, timeout_connect_MX.
7091 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7092 to the empty sender.
7094 39. The daemon was not analysing the content of -oX till after it had closed
7095 stderr and disconnected from the controlling terminal. This meant that any
7096 syntax errors were only noted on the panic log, and the return code from
7097 the command was 0. By re-arranging the code a little, I've made the
7098 decoding happen first, so such errors now appear on stderr, and the return
7099 code is 1. However, the actual setting up of the sockets still happens in
7100 the disconnected process, so errors there are still only recorded on the
7103 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7104 connections (as happens on some IP stacks) was logged at start up time as
7105 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7106 it from "IPv6 and IPv4", which means that two separate sockets are being
7109 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7110 says whether AF_INET or AF_INET6 was passed as an argument.
7112 42. Exiwhat output was messed up when time zones were included in log
7115 43. Exiwhat now gives more information about the daemon's listening ports,
7116 and whether -tls-on-connect was used.
7118 44. The "port" option of the smtp transport is now expanded.
7120 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7121 silently ignored. Now an error message is written to the main and panic
7124 46. There's a new ACL modifier called "logwrite" which writes to a log file
7125 as soon as it is encountered.
7127 47. Added $local_user_uid and $local_user_gid at routing time.
7129 48. Exim crashed when trying to verify a sender address that was being
7132 49. Exim was recognizing only a space character after ".include". It now also
7133 recognizes a tab character.
7135 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7136 extracting the relevant information from the specification. The man page no
7137 longer contains scrambled data for the -d option, and I've added a section
7138 at the front about calling Exim under different names.
7140 51. Added "extra_headers" argument to the "mail" command in filter files.
7142 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7145 53. Installed eximstats 1.29.
7147 54. Added transport_filter_timeout as a generic transport option.
7149 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7150 Cc: header lines. This was required by RFC 822, but it not required by RFC
7153 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7154 incoming messages that did not have them. Now it does so only if the
7155 message originates locally, that is, if there is no associated remote host
7156 address. When Resent- header lines are present, this applies to the Resent-
7157 lines rather than the non-Resent- lines.
7159 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7160 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7162 58. Messages for configuration errors now include the name of the main
7163 configuration file - useful now that there may be more than one file in a
7164 list (.included file names were always shown).
7166 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7167 for those rare installations that do not start the daemon as root or run it
7168 setuid root. I've cut out the call to initgroups() if the daemon is not
7171 60. The Exim user and group can now be bound into the binary as text strings
7172 that are looked up at the start of Exim's processing.
7174 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7176 62. Added $mailstore_basename variable.
7178 63. Installed patch to sieve.c from Michael Haardt.
7180 64. When Exim failed to open the panic log after failing to open the main log,
7181 the original message it was trying to log was written to stderr and debug
7182 output, but if they were not available (the usual case in production), it
7183 was lost. Now it is written to syslog before the two lines that record the
7184 failures to open the logs.
7186 65. Users' Exim filters run in subprocesses under the user's uid. It is
7187 possible for a "deliver" command or an alias in a "personal" command to
7188 provoke an address rewrite. If logging of address rewriting is configured,
7189 this fails because the process is not running as root or exim. There may be
7190 a better way of dealing with this, but for the moment (because 4.30 needs
7191 to be released), I have disabled address rewrite logging when running a
7192 filter in a non-root, non-exim process.
7198 1. The buildconfig auxiliary program wasn't quoting the value set for
7199 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7200 not defined. This bug was masked in 4.22 by the effect that was fixed in
7203 2. Some messages that were rejected after a message id was allocated were
7204 shown as "incomplete" by exigrep. It no longer does this for messages that
7205 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7207 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7208 have allow_domain_literals set, the ID did not get logged in the <= line.
7209 Domain literals are now always recognized in Message-ID: header lines.
7211 4. The first argument for a ${extract expansion item is the key name or field
7212 number. Leading and trailing spaces in this item were not being ignored,
7213 causing some misleading effects.
7215 5. When deliver_drop_privilege was set, single queue runner processes started
7216 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7217 same command in the process it spins off) were not dropping privilege.
7219 6. When the daemon running as "exim" started a queue runner, it always
7220 re-executed Exim in the spun-off process. This is a waste of effort when
7221 deliver_drop_privilege is set. The new process now just calls the
7222 queue-runner function directly.
7228 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7231 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7232 ignored. Though the use of -oP was forcing the writing of a pid file, it
7233 was always written to the default place.
7235 3. If the message "no IP address found for host xxxx" is generated during
7236 incoming verification, it is now followed by identification of the incoming
7237 connection (so you can more easily find what provoked it).
7239 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7241 5. Added some features to "harden" Exim a bit more against certain attacks:
7243 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7244 be put in Local/Makefile. This is like the never_users runtime option,
7245 but it cannot be overridden. The default setting is "root".
7247 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7248 prefix string with which any file named in a -C command line option
7251 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7252 is retained for -C and -D only if the caller of Exim is root. Without
7253 it, the exim user may also use -C and -D and retain privilege.
7255 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7256 command line option is disabled.
7258 6. Macro names set by the -D option must start with an upper case letter, just
7259 like macro names defined in the configuration file.
7261 7. Added "dereference=" facility to LDAP.
7263 8. Two instances of the typo "uknown" in the source files are fixed.
7265 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7266 the Configure-Makefile script screwed up while processing it.
7268 10. Incorporated PCRE 4.4.
7270 11. The SMTP synchronization check was not operating right at the start of an
7271 SMTP session. For example, it could not catch a HELO sent before the client
7272 waited for the greeting. There is now a check for outstanding input at the
7273 point when the greeting is written. Because of the duplex, asynchronous
7274 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7275 way, but not yet received, when the check is performed.
7277 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7278 on TCP/IP sockets, because this apparently causes some broken clients to
7281 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7282 unchanged) from the Cygwin maintainer.
7284 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7285 was supported instead of testing for mbx. Effectively a typo.
7287 15. The spa authenticator server code was not checking that the input it
7288 received was valid base64.
7290 16. The debug output line for the "set" modifier in ACLs was not showing the
7291 name of the variable that was being set.
7293 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7295 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7296 lookup on its own. Something else was needed to trigger the lookup. For
7297 example, a match in host_lookup or the need for a host name in a host list.
7298 Now, if $sender_host_name is referenced and the host name has not yet been
7299 looked up, a lookup is performed. If the lookup fails, the variable remains
7300 empty, and $host_lookup_failed is set to "1".
7302 19. Added "eqi" as a case-independent comparison operator.
7304 20. The saslauthd authentication condition could segfault if neither service
7305 nor realm was specified.
7307 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7308 error message that was logged was misleading, and incoming SMTP
7309 connections were dropped. The message is now more accurate, and temporary
7310 errors are given to SMTP connections.
7312 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7313 (except RSET) with a 421 error, until QUIT is received. However, it was
7314 failing to send a response to QUIT.
7316 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7317 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7318 ACL is now run after the helo_try_verify_hosts code.
7320 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7321 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7322 case-independent, so other case variants are also recognized). Apparently
7323 some systems use these upper case variants.
7325 25. If more than two messages were waiting for the same host, and a transport
7326 filter was specified for the transport, Exim sent two messages over the
7327 same TCP/IP connection, and then failed with "socket operation on non-
7328 socket" when it tried to send the third.
7330 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7332 27. The extern definition of crypt16() in expand.c was not being excluded when
7333 the OS had its own crypt16() function.
7335 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7336 as a preferred synonym for return_size_limit, both as an option and as an
7339 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7341 30. Changed the default configuration ACL to relax the local part checking rule
7342 for addresses that are not in any local domains. For these addresses,
7343 slashes and pipe symbols are allowed within local parts, but the sequence
7344 /../ is explicitly forbidden.
7346 31. SPA server authentication was not clearing the challenge buffer before
7349 32. log_message in a "warn" ACL statement was writing to the reject log as
7350 well as to the main log, which contradicts the documentation and doesn't
7351 seem right (because no rejection is happening). So I have stopped it.
7353 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7354 However, I am unable to do any testing of this.
7356 34. Fixed an infelicity in the appendfile transport. When checking directories
7357 for a mailbox, to see if any needed to be created, it was accidentally
7358 using path names with one or more superfluous leading slashes; tracing
7359 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7361 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7362 contents are added to the log line that is written for every discarded
7363 recipient. (Previously a log_message setting was ignored.)
7365 36. The ${quote: operator now quotes the string if it is empty.
7367 37. The install script runs exim in order to find its version number. If for
7368 some reason other than non-existence or emptiness, which it checks, it
7369 could not run './exim', it was installing it with an empty version number,
7370 i.e. as "exim-". This error state is now caught, and the installation is
7373 38. An argument was missing from the function that creates an error message
7374 when Exim fails to connect to the socket for saslauthd authentication.
7375 This could cause Exim to crash, or give a corrupted message.
7377 39. Added isip, isip4, and isip6 to ${if conditions.
7379 40. The ACL variables $acl_xx are now saved with the message, and can be
7380 accessed later in routers, transports, and filters.
7382 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7383 strings in the file are not string-expanded.
7385 42. If a MAIL command specified a SIZE value that was too large to fit into an
7386 int variable, the check against message_size_limit failed. Such values are
7387 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7388 day this will have to be increased, but I don't think I want to be around
7389 when emails are that large.
7396 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7397 iconv() is not standard in FreeBSD.
7399 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7400 IPv6 enabled. The observed symptom was a segmentation fault on return from
7401 the function os_common_find_running_interfaces() in src/os.c.
7403 3. In the check_special_case() function in daemon.c I had used "errno" as an
7404 argument name, which causes warnings on some systems. This was basically a
7405 typo, since it was named "eno" in the comments!
7407 4. The code that waits for the clock to tick (at a resolution of some fraction
7408 of a second) so as to ensure message-id uniqueness was always waiting for
7409 at least one whole tick, when it could have waited for less. [This is
7410 almost certainly not relevant at current processor speeds, where it is
7411 unlikely to ever wait at all. But we try to future-proof.]
7413 5. The function that sleeps for a time interval that includes fractions of a
7414 second contained a race. It did not block SIGALRM between setting the
7415 timer, and suspending (a couple of lines later). If the interval was short
7416 and the sigsuspend() was delayed until after it had expired, the suspension
7417 never ended. On busy systems this could lead to processes getting stuck for
7420 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7421 process, before it forks any delivery processes. The open lookup caching
7422 mechanism meant that the open file or database connection was passed into
7423 the delivery process. The problem was that delivery processes always tidy
7424 up cached lookup data. This could cause a problem for the next delivery
7425 process started by the queue runner, because the external queue runner
7426 process does not know about the closure. So the next delivery process
7427 still has data in the lookup cache. In the case of a file lookup, there was
7428 no problem because closing a file descriptor in a subprocess doesn't affect
7429 the parent. However, if the lookup was caching a connection to a database,
7430 the connection was closed, and the second delivery process was likely to
7431 see errors such as "PGSQL: query failed: server closed the connection
7432 unexpectedly". The problem has been fixed by closing all cached lookups
7433 in a queue runner before running a delivery process.
7435 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7436 seem to have the "const" qualifier which it has on other OS. I've
7439 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7440 *of the same type* (client or server) with the same public name that an
7441 error should be diagnosed.
7443 9. When Exim looked up a host name for an IP address, but failed to find the
7444 original IP address when looking up the host name (a safety check), it
7445 output the message "<ip address> does not match any IP for NULL", which was
7446 confusing, to say the least. The bug was that the host name should have
7447 appeared instead of "NULL".
7449 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7450 user that is built into the binary, and the -C or -D options is used, root
7451 privilege is dropped before the configuration file is read. In addition,
7452 logging is switched to stderr instead of the normal log files. If the
7453 configuration then re-defines the Exim user, the unprivileged environment
7454 is probably not what is expected, so Exim logs a panic warning message (but
7457 However, if deliver_drop_privilege is set, the unprivileged state may well
7458 be exactly what is intended, so the warning has been cut out in that case,
7459 and Exim is allowed to try to write to its normal log files.
7465 1. smtp_return_error_details was not giving details for temporary sender
7466 or receiver verification errors.
7468 2. Diagnose a configuration error if two authenticators have the same public
7471 3. Exim used not to create the message log file for a message until the first
7472 delivery attempt. This could be confusing when incoming messages were held
7473 for policy or load reasons. The message log file is now created at the time
7474 the message is received, and an initial "Received" line is written to it.
7476 4. The automatically generated man page for command line options had a minor
7477 bug that caused no ill effects; however, a more serious problem was that
7478 the procedure for building the man page automatically didn't always
7479 operate. Consequently, release 4.20 contains an out-of-date version. This
7480 shouldn't happen again.
7482 5. When building Exim with embedded Perl support, the script that builds the
7483 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7484 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7486 6. The freeze_tell option was not being used for messages that were frozen on
7487 arrival, either by an ACL or by local_scan().
7489 7. Added the smtp_incomplete_transaction log selector.
7491 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7492 was accepting AUTH without a new EHLO.
7494 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7495 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7498 10. Logging of TCP/IP connections (when configured) now happens in the main
7499 daemon process instead of the child process, so that the TCP/IP connection
7500 count is more accurate (but it can never be perfect).
7502 11. The use of "drop" in a nested ACL was not being handled correctly in the
7503 outer ACL. Now, if condition failure induced by the nested "drop" causes
7504 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7505 or "require"), the connection is dropped.
7507 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7508 that yield "discard" can now be used with an "accept" or a "discard" verb,
7509 but an error is generated for any others (because I can't see a useful way
7510 to define what should happen).
7512 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7513 are now processed in the same way as lines in the Exim configuration file.
7514 In particular, continuation lines are supported.
7516 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7518 15. Added -ti meaning -t -i.
7520 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7521 domains, and warn by logging if others are found.
7523 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7524 returned from GIFCONF when Exim is trying to find the list of interfaces on
7525 a host. The code in os.c has been modified to copy each ifreq to an aligned
7526 structure in all cases.
7528 Also, in some cases, the returned ifreq's were being copied to a 'struct
7529 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7530 means the last couple of bytes of an IPv6 address could be chopped if the
7531 ifreq contained only a normal sockaddr (14 bytes storage).
7533 18. Named domain lists were not supported in the hosts_treat_as_local option.
7534 An entry such as +xxxx was not recognized, and was treated as a literal
7537 19. Ensure that header lines added by a DATA ACL are included in the reject log
7538 if the ACL subsequently rejects the message.
7540 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7541 MD5 (which is deprecated).
7543 21. When testing a filter file using -bf, Exim was writing a message when it
7544 took the sender from a "From " line in the message, but it was not doing so
7545 when it took $return_path from a Return-Path: header line. It now does.
7547 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7548 with a valid header line field name (a series of printing characters
7549 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7551 23. Changed "disc" in the source to "disk" to conform to the documentation and
7552 the book and for uniformity.
7554 24. Ignore Sendmail's -Ooption=value command line item.
7556 25. When execve() failed while trying to run a command in a pipe transport,
7557 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7558 could be confused with a return value of 69 from the command itself. This
7559 has been changed to 127, the value the shell returns if it is asked to run
7560 a non-existent command. The wording for the related log line suggests a
7561 non-existent command as the problem.
7563 26. If received_header_text expands to an empty string, do not add a Received:
7564 header line to the message. (Well, it adds a token one on the spool, but
7565 marks it "old" so that it doesn't get used or transmitted.)
7567 27. Installed eximstats 1.28 (addition of -nt option).
7569 28. There was no check for failure on the call to getsockname() in the daemon
7570 code. This can fail if there is a shortage of resources on the system, with
7571 ENOMEM, for example. A temporary error is now given on failure.
7573 29. Contrary to the C standard, it seems that in some environments, the
7574 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7575 program. Exim now does this explicitly; it affects the formatting of
7576 timestamps using strftime().
7578 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7579 complaints. I've now initialized all the variables, to avoid this.
7581 32. Header lines added by a system filter were not being "seen" during
7582 transport-time rewrites.
7584 33. The info_callback() function passed to OpenSSL is set up with type void
7585 (*)(SSL *, int, int), as described somewhere. However, when calling the
7586 function (actually a macro) that sets it up, the type void(*)() is
7587 expected. I've put in a cast to prevent warnings from picky compilers.
7589 34. If a DNS black list lookup found a CNAME record, but there were no A
7590 records associated with the domain it pointed at, Exim crashed.
7592 35. If a DNS black list lookup returned more than one A record, Exim ignored
7593 all but the first. It now scans all returned addresses if a particular IP
7594 value is being sought. In this situation, the contents of the
7595 $dnslist_value variable are a list of all the addresses, separated by a
7598 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7599 to accept a host name and all its aliases if the forward lookup for any of
7600 them yielded the IP address of the incoming connection. Now it accepts only
7601 those names whose forward lookup yields the correct IP address. Any other
7602 names are discarded. This closes a loophole whereby a rogue DNS
7603 administrator could create reverse DNS records to break through a
7604 wildcarded host restriction in an ACL.
7606 37. If a user filter or a system filter that ran in a subprocess used any of
7607 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7608 the wrong values were passed to the pipe command ($thisaddress had the
7609 value of $0, $0 had the value of $1, etc). This bug was introduced by
7610 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7612 38. Improved the line breaking for long SMTP error messages from ACLs.
7613 Previously, if there was no break point between 40 and 75 characters, Exim
7614 left the rest of the message alone. Two changes have been made: (a) I've
7615 reduced the minimum length to 35 characters; (b) if it can't find a break
7616 point between 35 and 75 characters, it looks ahead and uses the first one
7617 that it finds. This may give the occasional overlong line, but at least the
7618 remaining text gets split now.
7620 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7621 file descriptors might be low, and that setting 1000 would always raise it.
7622 It turns out that in some environments, the limit is already over 1000 and
7623 that lowering it causes trouble. So now Exim takes care not to decrease it.
7625 40. When delivering a message, the value of $return_path is set to $sender_
7626 address at the start of routing (routers may change the value). By an
7627 oversight, this default was not being set up when an address was tested by
7628 -bt or -bv, which affected the outcome if any router or filter referred to
7631 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7632 log only when "message" or "log_message" are set. However, if one of the
7633 conditions was an address verification, or a call to a nested ACL, the
7634 messages generated by the underlying test were being passed through. This
7635 no longer happens. The underlying message is available in $acl_verify_
7636 message for both "message" and "log_message" expansions, so it can be
7637 passed through if needed.
7639 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7640 new expansion $bh_ to give the encoded byte string without charset
7641 translation. Translation happens only if iconv() is available; HAVE_ICONV
7642 indicates this at build time. HEADERS_CHARSET gives the charset to
7643 translate to; headers_charset can change it in the configuration, and
7644 "headers charset" can change it in an individual filter file.
7646 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7647 that creates RFC 2047 encoded "words" labels them as that charset instead
7648 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7649 expansion operator; (ii) when Exim creates a From: line for a local
7650 message; (iii) when a header line is rewritten to include a "phrase" part.
7652 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7653 buggy, causing it to skip the first lines of messages whose message ID
7654 ended in 'D'. This would not have bitten before Exim release 4.14, because
7655 message IDs were unlikely to end in 'D' before then. The effect was to have
7656 incorrect size information for certain domains.
7658 45. #include "config.h" was missing at the start of the crypt16.c module. This
7659 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7662 46. If there was a timeout during a "random" callout check, Exim treated it as
7663 a failure of the random address, and carried on sending RSET and the real
7664 address. If the delay was just some slowness somewhere, the response to the
7665 original RCPT would be taken as a response to RSET and so on, causing
7666 mayhem of various kinds.
7668 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7669 when I implemented it. It didn't allow for the fact that some option values
7670 may legitimately be negative (e.g. size_addition), and it didn't even do
7671 the right test for positive values.
7673 48. Domain names in DNS records are case-independent. Exim always looks them up
7674 in lower case. Some resolvers return domain names in exactly the case they
7675 appear in the zone file, that is, they may contain uppercase letters. Not
7676 all resolvers do this - some return always lower case. Exim was treating a
7677 change of case by a resolver as a change of domain, similar to a widening
7678 of a domain abbreviation. This triggered its re-routing code and so it was
7679 trying to route what was effectively the same domain again. This normally
7680 caused routing to fail (because the router wouldn't handle the domain
7681 twice). Now Exim checks for this case specially, and just changes the
7682 casing of the domain that it ultimately uses when it transmits the message
7685 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7688 50. If a filter generated a file delivery with a non-absolute name (possible if
7689 no home directory exists for the router), the forbid_file option was not
7692 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7693 the existing equality matching.
7695 52. Exim was using ints instead of ino_t variables in some places where it was
7696 dealing with inode numbers.
7698 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7699 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7700 called TMPDIR, and if it finds it is different, it changes its value.
7702 54. The smtp_printf() function is now made available to local_scan() so
7703 additional output lines can be written before returning. There is also an
7704 smtp_fflush() function to enable the detection of a dropped connection.
7705 The variables smtp_input and smtp_batched_input are exported to
7708 55. Changed the default runtime configuration: the message "Unknown user"
7709 has been removed from the ACL, and instead placed on the localuser router,
7710 using the cannot_route_message feature. This means that any verification
7711 failures that generate their own messages won't get overridden. Similarly,
7712 the "Unrouteable address" message that was in the ACL for unverifiable
7713 relay addresses has also been removed.
7715 56. Added hosts_avoid_esmtp to the smtp transport.
7717 57. The exicyclog script was not checking for the esoteric option
7718 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7719 will work only if exicyclog is run under the appropriate euid.
7721 58. Following a discussion on the list, the rules by which Exim recognises line
7722 endings on incoming messages have been changed. The -dropcr and drop_cr
7723 options are now no-ops, retained only for backwards compatibility. The
7724 following line terminators are recognized: LF CRLF CR. However, special
7725 processing applies to CR:
7727 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7728 nor a local message in the state where . is a terminator.
7730 (ii) If a bare CR is encountered in a header line, an extra space is added
7731 after the line terminator so as not to end the header. The reasoning
7732 behind this is that bare CRs in header lines are most likely either
7733 to be mistakes, or people trying to play silly games.
7735 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7736 was being incorrectly given as 18 bytes larger than it should have been.
7737 This is a VOB (very old bug).
7739 60. This may never have affected anything current, but just in case it has:
7740 When the local host is found other than at the start of a list of hosts,
7741 the local host, those with the same MX, and any that follow, are discarded.
7742 When the list in question was part of a longer list of hosts, the following
7743 hosts (not currently being processed) were also being discarded. This no
7744 longer happens. I'm not sure if this situation could ever has previously
7747 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7750 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7751 header. This is something that is recommended in a new Internet Draft, and
7752 is something that is documented as being done by Sendmail. There are two
7753 possible values. For messages generated by the autoreply transport, Exim
7756 Auto-Submitted: auto-replied
7758 whereas for all other generated messages (e.g. bounces) it adds
7760 Auto-Submitted: auto-generated
7762 63. The "personal" condition in filters now includes a test for the
7763 Auto-Submitted: header. If it contains the string "auto-" the message it
7764 not considered personal.
7766 64. Added rcpt_include_affixes as a generic transport option.
7768 65. Added queue_only_override (default true).
7770 66. Added the syslog_duplication option.
7772 67. If what should have been the first header line of a message consisted of
7773 a space followed by a colon, Exim was mis-interpreting it as a header line.
7774 It isn't of course - it is syntactically invalid and should therefore be
7775 treated as the start of the message body. The misbehaviour could have
7776 caused a number of strange effects, including loss of data in subsequent
7777 header lines, and spool format errors.
7779 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7780 client host had authenticated. This control can now be exercised by an ACL
7781 for more flexibility.
7783 69. By default, callouts do not happen when testing with -bh. There is now a
7784 variant, -bhc, which does actually run the callout code, including
7785 consulting and updating the callout cache.
7787 70. Added support for saslauthd authentication, courtesy of Alexander
7790 71. If statvfs() failed on the spool or log directories while checking their
7791 size for availability, Exim confusingly gave the error "space shortage".
7792 Furthermore, in debugging mode it crashed with a floating point exception.
7793 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7794 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7795 serious problem, Exim now writes to the main and panic logs when this
7796 happens, with details of the failure. It then refuses to accept the
7797 incoming message, giving the message "spool directory problem" or "log
7798 directory problem" with a 421 code for SMTP messages.
7800 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7801 0, 1, and 2 exist, because some OS complain for execs without them (see
7802 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7803 descriptors. However, the code omitted to check that the open succeeded,
7804 causing mysterious errors if for some reason the permissions on /dev/null
7805 got screwed. Now Exim writes a message to the main and panic logs, and
7806 bombs out if it can't open /dev/null.
7808 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7809 interact so that it is all more flexible. It is supposed to remain
7810 backwards compatible. Also added extra_local_interfaces.
7812 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7813 to bomb out with an assertion failure - to the client this appears as a
7814 connection drop. This problem occurs in the part of the code that was taken
7815 from the Samba project. Fortunately, the assertion is in a very simple
7816 function, so I have fixed this by reproducing the function inline in the
7817 one place where it is called, and arranging for authentication to fail
7818 instead of killing the process with assert().
7820 75. The SPA client code was not working when the server requested OEM rather
7821 than Unicode encoding.
7823 76. Added code to make require_files with a specific uid setting more usable in
7824 the case where statting the file as root fails - usually a non-root-mounted
7825 NFS file system. When this happens and the failure is EACCES, Exim now
7826 forks a subprocess and does the per-uid checking as the relevant uid.
7828 77. Added process_log_path.
7830 78. If log_file_path was not explicitly set, a setting of check_log_space or
7831 check_log_inodes was ignored.
7833 79. If a space check for the spool or log partitions fails, the incident is now
7834 logged. Of course, in the latter case the data may get lost...
7836 80. Added the %p formatting code to string_format() so that it can be used to
7837 print addresses in debug_print(). Adjusted all the address printing in the
7838 debugging in store.c to use %p rather than %d.
7840 81. There was a concern that a line of code in smtp_in.c could overflow a
7841 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7842 initially expressed, the concern was not well-founded, because trailing
7843 spaces are removed early. However, if the trailing spaces were followed by
7844 a NULL, they did not get removed, so the overflow was possible. Two fixes
7847 (a) I re-wrote the offending code in a cleaner fashion.
7848 (b) If an incoming SMTP command contains a NULL character, it is rejected
7851 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7852 runs initgroups(), so that if the Exim user is in any additional groups,
7853 they will be used during message reception.
7859 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob