1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
6 Since Exim version 4.94
7 -----------------------
9 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
10 as arguments, so an implementation trying to copy these into a local
11 buffer was taking a taint-enforcement trap. Fix by using dynamically
12 created buffers. Similar fix for radius expansion condition.
14 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
15 reasonable, eg. to count headers. Fix by using dynamically created
16 buffers rather than a local. Do similar fixes for ACL actions "dcc",
17 "log_reject_target", "malware" and "spam"; the arguments are expanded
18 so could be handling tainted values.
20 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
21 broken the (no-op) support for this sendmail command. Restore it
22 to doing nothing, silently, and returning good status.
24 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
25 record path was given (or the default used) without a leading directory
26 path, an error occurred on trying to open it. Use the transport's working
29 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
30 transport. Previously it was the name on the DNS A-record; use instead
31 the head of the CNAME chain leading there (if there is one). This seems
32 to align better with RFC 6125.
34 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
35 smtp_accept_max_per_host allocated resources which were not released
36 when the limit was exceeded. This eventually crashed the daemon. Fix
37 by adding a relase action in that path.
39 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
40 expanded; previously using tainted values was rejected. Fix by using
41 dynamically-created buffers.
43 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
44 Previously a macro used one argument twice; when called with the
45 argument as an expression having side-effects, incorrect operation
46 resulted. Use an inlineable function.
48 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
49 held open for a verify callout. Previously this wan not accounted for
50 and a corrupt onward SMTP conversation resulted.
52 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
53 excluded, not matching the documentation.
55 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
56 was given for the sqlite_dbfile a trap resulted.
58 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
59 "name" argument resulted in a trap. There is no reason to disallow such;
60 this was a coding error.
62 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
63 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
64 spent suspended, ignoring the Posix definition. Previously we assumed
65 it did and a constant offset from real time could be used as a correction.
66 Change to using the same clock source for the start-of-message and the
67 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
68 exists, just to get a clock slightly more aligned to reality.
70 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
71 RFC says it is optional some validators care. The missing char was not
72 intended but triggered by a line-wrap alignement. Discovery and fix by
73 Guillaume Outters, hacked on by JH.
75 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
76 name being quoted was tainted a trap would be taken. Fix by using
77 dynamicaly created buffers. The routine could have been called by a
78 rewrite with the "h" flag, by using the "-F" command-line option, or
79 by using a "name=" option on a control=submission ACL modifier.
81 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
82 Previously when a whitespace character was specified it was not inserted
83 after removing the newline.
85 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
86 is_tainted() had an off-by-one error in the overenthusiastic direction.
87 Find and fix by Gavan. Although NetBSD is not a supported platform for
88 4.94 this bug could affect other platforms.
90 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
91 is_tainted() had an off-by-one error in the overenthusiastic direction.
92 Find and fix by Gavan. Although NetBSD is not a supported platform for
93 4.94 this bug could affect other platforms.
94 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
95 Previously when a whitespace character was specified it was not inserted
96 after removing the newline.
98 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
99 the domain part of the recipient address. This overrides any tls_sni
100 option set, which was previously used.
102 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
105 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
106 than one server was defined and depending on the platform memory layout
107 details, an internal consistency trap could be hit while walking the list
110 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
111 files. The value is used by the authresults expansion item. Previously
112 if this was used in a router or transport, a crash could result.
114 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
115 applied. This resulted, if any header-line rewrite rules were configured,
116 in a panic-log trigerrable by sending a message with a long address in
117 a header. Fix by increaing the arbitrary limit to larger than a single
118 (dewrapped) 5322 header line maximum size.
120 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
121 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
122 RFC 6648 which deprecates X- options in protocols as a general practice.
123 Changeover between the implementations is handled by the mechanisms
126 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
127 a remote which uses callout/hold. Previously the local was queued.
129 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
132 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
138 JH/01 Avoid costly startup code when not strictly needed. This reduces time
139 for some exim process initialisations. It does mean that the logging
140 of TLS configuration problems is only done for the daemon startup.
142 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
144 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
145 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
148 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
149 DKIM signing is being done. Previously a transport_filter would always
150 disable CHUNKING, falling back to traditional DATA.
152 JH/05 Regard command-line receipients as tainted.
154 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
156 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
157 PAM library frees one of the arguments given to it, despite the
158 documentation. Therefore a plain malloc must be used.
160 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
161 on-stack buffers were used, resulting in a taint trap when DSN information
162 copied from a received message was written into the buffer.
164 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
165 the ordering of its ARC headers. This caused a crash.
167 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
168 a new record was being constructed with information from the peer, a trap
171 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
172 installation would get error messages from DMARC verify, when it hit the
173 nonexistent file indicated by the default. Distros wanting DMARC enabled
174 should both provide the file and set the option.
175 Also enforce no DMARC verification for command-line sourced messages.
177 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
178 could, depending on the platform, hang at the STARTTLS response.
180 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
181 message on a connection. Previously if one message had ARC headers and
182 the following one did not, a crash could result when adding an
183 Authentication-Results: header.
185 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
186 Exim main code and Exim-related utities. The introduction of taint
187 tracking also did many adjustments to string handling. Since then, eximon
188 frequently terminated with an assert failure.
190 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
191 check for 452 responses. This slightly helps the inefficieny of doing
192 a large alias-expansion into a recipient-limited target. The max_rcpt
193 transport option still applies (and at the current default, will override
194 the new feature). The check is done for either cause of synch, and forces
195 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
196 connection. The new facility is not tunable at this time.
198 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
199 library live data was being used, so the results became garbage. Make
200 copies while it is still usable.
202 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
203 on delivery deferred (==) and failed (**) lines (if a delivery was
204 attemtped). Previously it was only on completion (=>) lines.
206 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
207 for the expansion of the server_scram_iter and server_scram_salt options.
209 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
210 are now specifically given a NO_DATA response without hitting the system
211 resolver. The library goes on to do the now-standard TXT lookup.
212 Use of dnsdb lookups is not affected.
214 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
215 only retrieve the errormessage once. Previously two calls to dlerror()
216 were used, and the second one (for mainlog/paniclog) retrieved null
219 JH/20 Taint checking: disallow use of tainted data for
220 - the appendfile transport file and directory options
221 - the pipe transport command
222 - the autoreply transport file, log and once options
223 - file names used by the redirect router (including filter files)
225 - paths used by single-key lookups
226 Previously this was permitted.
228 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
229 adjusted the size of a major service buffer; this failed because the
230 buffer was in use at the time. Change to a compile-time increase in the
231 buffer size, when this authenticator is compiled into exim.
233 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
234 previous fast-mode was untenable in the face of glibs using mmap to
235 support larger malloc requests.
237 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
238 New values supported, if defined on system where compiled:
239 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
240 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
242 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
243 running a limited number of proceses in parallel, a benefit is gained. The
244 amount varies with the platform hardware and load. The use of the option
245 queue_run_in_order means we cannot do this, as ordering becomes
248 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
249 had introduced a string-copy (for ensuring NUL-termination) which was not
250 appropriate for that case, which can include embedded NUL bytes in the
251 block of data. Investigation showed the copy to actually be needless, the
252 data being length-specified.
254 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
255 done during a receiving connection, and both used TLS, global info was
256 used rather than per-connection info for tracking the state of data
257 queued for transmission. This could result in a connection hang.
259 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
260 Previously, when delivering serveral messages down a single connection
261 only the first would provide a SIZE. This was due to the size information
262 not being properly tracked.
264 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
265 TAI (at 37 seconds currently), pretend to be in UTC for time-related
266 expansion and logging. Previously, spurious values such as a future
267 minute could be seen.
269 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
270 it could crash from a null-deref. This could also affect the
271 ${addresses: } operator and ${readsock } item.
273 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
274 message following a mime one, the variable was not reset.
276 JH/30 When an pipelined-connect fails at the first response, assume incorrect
277 cached capability (perhaps the peer reneged?) and immediately retry in
280 JH/31 Fix spurious detection of timeout while writing to transport filter.
282 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
283 an attempt to copy the string was made before checking it.
285 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
286 taint of the lookup key was maintained; we now regard the presence in the
287 filesystem as sufficient validation.
289 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
290 argument is supplied.
292 JH/35 The dsearch lookup now requires that the directory is an absolute path.
293 Previously this was not checked, and nonempty relative paths made an
294 access under Exim's current working directory.
296 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
297 Previously no event was raised.
299 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
300 parameter supplied by the sender MAIL FROM command. Previously it was
301 ignored, and only the check_spool_space option value for the required
304 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
305 the size of the signing public-key. Previously it was instead giving
306 the size of the signature hash.
308 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
309 the default. See the (new) dkim_verify_min_keysizes option.
311 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
312 and an ACL use a lookup for checking either the local_part or domain,
313 stale data could be accessed. Ensure that variable references are
314 dropped between messages.
316 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
317 by the client was not checked as pointing within response data before
318 being used. A malicious client could thus cause an out-of-bounds read and
319 possibly gain authentication. Fix by adding the check.
321 JH/42 Internationalisation: change the default for downconversion in the smtp
322 transport to be "if needed". Previously it was "as previously set" for
323 the message, which usually meant "if needed" for message-submission but
324 "no" for everything else. However, MTAs have been seen using SMTPUTF8
325 even when the envelope addresses did not need it, resulting in forwarding
326 failures to non-supporting MTAs. A downconvert in such cases will be
327 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
328 transport. The change does mean that addresses needing conversion will
329 be converted when previously a delivery failure would occur.
331 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
332 response was received it would be used unchecked in a fail-DSN, violating
333 standards on line-length limits. Truncate if needed.
335 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
336 doesn't work. (Additionally add a new main config option to configure the
343 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
344 side, to decode a TLS 1.3 packet capture.
346 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
347 Previously the default library behaviour applied, sending two, each in
350 JH/03 Debug output for ACL now gives the config file name and line number for
353 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
355 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
357 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
358 buffer overrun for (non-chunking) other transports.
360 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
361 TLS1.3, means that a server rejecting a client certificate is not visible
362 to the client until the first read of encrypted data (typically the
363 response to EHLO). Add detection for that case and treat it as a failed
364 TLS connection attempt, so that the normal retry-in-clear can work (if
365 suitably configured).
367 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
368 and/or domain. Found and fixed by Jason Betts.
370 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
371 configuration). If a CNAME target was not a wellformed name pattern, a
374 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
375 the OS reports them interleaved with other addresses.
377 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
378 used both for input and for a verify callout, both encrypted, SMTP
379 responses being sent by the server could be lost. This resulted in
380 dropped connections and sometimes bounces generated by a peer sending
383 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
384 string. Previously it was possible to cause undefined behaviour in a
385 library routine (usually a crash). Found by "zerons".
387 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
390 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
391 API was removed, so update to use the newer ones.
393 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
394 any timeout set, is taking a long time. Previously we would hang on to a
395 rotated logfile "forever" if the input was arriving with long gaps
396 (a previous attempt to fix addressed lack, for a long time, of initial
399 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
400 shared (NFS) environment. The length of the tempfile name is now
401 4 + 16 ("hdr.$message_exim_id") which might break on file
402 systems which restrict the file name length to lower values.
405 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
406 shared (NFS) environment.
408 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
409 did for all versions <4.90). Notably -M, -m, --invert, -I may be
412 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
413 on some platforms for bit 31.
415 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
416 to changes apparently associated with TLS1.3 handling some of the APIs
417 previously used were either nonfunctional or inappropriate. Strings
418 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
419 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
420 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
421 This affects log line X= elements, the $tls_{in,out}_cipher variables,
422 and the use of specific cipher names in the encrypted= ACL condition.
424 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
426 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
427 verification result was not updated unless hosts_require_ocsp applied.
429 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
430 queue_list_requires_admin set to false, non-admin users were denied the
433 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
434 directory-of-certs mode. Previously they were advertised despite the
437 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
438 A single TCP connection by a client will now hold a TLS connection open
439 for multiple message deliveries, by default. Previously the default was to
442 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
443 default. If built with the facility, DANE will be used. The facility
444 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
446 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
447 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
448 must be defined and you must still, unless you define DISABLE_TLS, manage
449 the the include-dir and library-file requirements that go with that
450 choice. Non-TLS builds are still supported.
452 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
455 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
456 default. If the platform supports and has the facility enabled, it will
457 be requested on all coneections.
459 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
460 controlled by the build-time option SUPPORT_PIPE_CONNECT.
462 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
464 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
465 success-DSN messages. Previously the From: header was always the default
466 one for these; the option was ignored.
468 JH/28 Fix the timeout on smtp response to apply to the whole response.
469 Previously it was reset for every read, so a teergrubing peer sending
470 single bytes within the time limit could extend the connection for a
471 long time. Credit to Qualsys Security Advisory Team for the discovery.
473 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
474 delivery address, which leaked information of the results of local
475 forwarding. Change to the original envelope recipient address, per
478 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
479 requested. Previously not bounce was generated and a log entry of
480 error ignored was made.
482 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
484 JH/32 Introduce a general tainting mechanism for values read from the input
485 channel, and values derived from them. Refuse to expand any tainted
486 values, to catch one form of exploit.
488 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
489 was unused and the unexpanded text used for the test. Found and
490 fixed by Ruben Jenster.
492 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
493 an attempt to use a TLS library read routine dereffed a nul pointer,
496 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
497 them in our smtp response.
499 JH/36 Have the general router option retry_use_local_part default to true when
500 any of the restrictive preconditions are set (to anything). Previously it
501 was only for check_local user. The change removes one item of manual
502 configuration which is required for proper retries when a remote router
503 handles a subset of addresses for a domain.
505 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
506 link count into consideration.
508 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
509 caused the extension of big_buffer, the following lines were ignored.
511 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
512 accordance with RFC 2308. Previously there was no expiry, so a longlived
513 receive process (eg. due to ACL delays) versus a short SOA value could
516 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
518 JH/39 Promote DMARC support to mainline.
520 JH/40 Bug 2452: Add a References: header to DSNs.
522 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
523 parameters. The relevant library call is documented as "Deprecated: This
524 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
525 3.6.0, DH parameters are negotiated following RFC7919."
527 HS/06 Change the default of dnssec_request_domains to "*"
529 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
530 carried on and emitted a BDAT command, even when PIPELINING was not
533 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
534 buffer was used for the filename, resulting in a trap when tainted
535 arguments (eg. $domain) were used.
537 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
538 recommended to avoid a possible server-load attack. The feature can be
539 re-enabled via the openssl_options main cofiguration option.
541 JH/45 local_scan API: documented the current smtp_printf() call. This changed
542 for version 4.90 - adding a "more data" boolean to the arguments.
543 Bumped the ABI version number also, this having been missed previously;
544 release versions 4.90 to 4.92.3 inclusive were effectively broken in
545 respect of usage of smtp_printf() by either local_scan code or libraries
546 accessed via the ${dlfunc } expansion item. Both will need coding
547 adjustment for any calls to smtp_printf() to match the new function
548 signature; a FALSE value for the new argument is always safe.
550 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
551 the file-offset (which the Linux syscall does, and exim expects); this
552 resulted in an indefinite loop.
554 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
555 to do ARC verification. The Authentication-Results: header line added
556 by the configuration then had no ARC item.
562 JH/01 Remove code calling the customisable local_scan function, unless a new
563 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
565 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
566 non-signal-safe functions being used.
568 JH/03 Bug 2269: When presented with a received message having a stupidly large
569 number of DKIM-Signature headers, disable DKIM verification to avoid
570 a resource-consumption attack. The limit is set at twenty.
572 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
573 report of oldest_pass in ${authres } in consequence, and separate out
574 some descriptions of reasons for verification fail.
576 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
577 files in the spool were present and unlocked. A queue-runner could spot
578 them, resulting in a duplicate delivery. Fix that by doing the unlock
579 after the unlink. Investigation by Tim Stewart. Take the opportunity to
580 add more error-checking on spoolfile handling while that code is being
583 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
584 No known attacks, no CVE, this is defensive hardening.
586 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
587 a queue-runner could start a delivery while other operations were ongoing.
588 Cutthrough delivery was a common victim, resulting in duplicate delivery.
589 Found and investigated by Tim Stewart. Fix by using the open message data
590 file handle rather than opening another, and not locally closing it (which
591 releases a lock) for that case, while creating the temporary .eml format
592 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
594 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
595 $sender_verify_failure/$recipient_verify_failure to "random".
597 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
600 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
601 Previously this would segfault.
603 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
606 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
607 like zero, since the resolver should be doing this for us, But we need one
608 as a CNAME but no MX presence gets the CNAME returned; we need to check
609 that doesn't point to an MX to declare it "no MX returned" rather than
610 "error, loop". A new main option is added so the older capability of
611 following some limited number of chain links is maintained.
613 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
615 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
616 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
617 now-deprecated earlier definitions used only specified the range up to TLS
618 1.2 (in the older-version library docs).
620 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
622 JH/15 Rework TLS client-side context management. Stop using a global, and
623 explicitly pass a context around. This enables future use of TLS for
624 connections to service-daemons (eg. malware scanning) while a client smtp
625 connection is using TLS; with cutthrough connections this is quite likely.
627 JH/16 Fix ARC verification to do AS checks in reverse order.
629 JH/17 Support a "tls" option on the ${readsocket } expansion item.
631 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
632 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
633 Previously the "utf8" would be re-prepended for every additional message.
635 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
636 Previously thery were accepted, resulting in issues when attempting to
637 forward messages to a non-supporting MTA.
639 PP/02 Let -n work with printing macros too, not just options.
641 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
642 one parent address was copied, and bogus data was used at delivery-logging
643 time. Either a crash (after delivery) or bogus log data could result.
644 Discovery and analysis by Tim Stewart.
646 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
647 Previously if the string ended mid-character, we did not insert the
648 promised '?' replacement.
650 PP/04 Documentation: current string operators work on bytes, not codepoints.
652 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
653 should pack well giving a smaller memory footprint so better caching and
654 therefore performance. Group the declarations where this can't be done so
655 that the byte-sized flag variables are not interspersed among pointer
656 variables, giving a better chance of good packing by the compiler.
658 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
659 non-null, to avoid issues with sites running BATV. Previously reports were
660 sent with an empty envelope sender so looked like bounces.
662 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
663 The ignore_error flag wasn't being returned from the filter subprocess so
664 was not set for later routers. Investigation and fix by Matthias Kurz.
666 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
667 and a msg:complete for the whole, when a message is manually removed using
668 -Mrm. Developement by Matthias Kurz, hacked on by JH.
670 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
671 a "Gnu special" function, asprintf() in the DB utility binary builds; I
672 hope that is portable enough.
674 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
675 requiring a known-CA anchor certificate; make it now rely entirely on the
676 TLSA as an anchor. Checking the name on the leaf cert against the name
677 on the A-record for the host is still done for TA (but not for EE mode).
679 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
680 included in delivery lines for non-proxied connections, when compiled with
681 SUPPORT_SOCKS and running with proxy logging enabled.
683 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
684 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
685 move the existing event to fire before the normal logging of message
686 failure so that custom logging is bracketed by normal logging.
688 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
689 msg:fail:internal event. Developement by Matthias Kurz.
691 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
692 far too small for todays use of crypto signatures stored there. Go all
693 the way to the max DNS message size of 64kB, even though this might be
694 overmuch for IOT constrained device use.
696 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
697 copy a string over itself. The library routine is documented as not
698 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
700 JH/32 For main options check_spool_space and check_inode_space, where the
701 platform supports 64b integers, support more than the previous 2^31 kB
702 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
703 the previous G, M, k.
705 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
706 $authenticated_fail_id variable on authentication failure. Previously
709 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
710 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
711 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
712 GNUTLS_SEC_PARAM_MEDIUM.
714 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
715 side. Previously we would continue as if no SNI had been received.
717 JH/36 Harden the handling of string-lists. When a list consisted of a sole
718 "<" character, which should be a list-separator specification, we walked
719 off past the nul-terimation.
721 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
722 causes) even when the retry time is not yet met. Previously they were
723 not, meaning that when (say) an account was over-quota and temp-rejecting,
724 and multiple senders' messages were queued, only one sender would get
725 notified on each configured delay_warning cycle.
727 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
729 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
730 cipher-suites, an error can be left on the stack even for a succeeding
731 accept; this results in impossible error messages when a later operation
734 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
735 return error codes indicating retry. Under TLS1.3 this becomes required.
737 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
738 it only wrote the new authenticators, resulting in a lack of tracking of
739 peer changes of ESMTP extensions until the next cache flush.
741 JH/41 Fix the loop reading a message header line to check for integer overflow,
742 and more-often against header_maxsize. Previously a crafted message could
743 induce a crash of the recive process; now the message is cleanly rejected.
745 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
746 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
752 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
753 When redis_servers is set to a list of > 1 element, and the Redis servers
754 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
755 case of MOVED into a DEFER case instead, thus moving the query onto the
756 next server in the list. For a cluster of N elements, all N servers must
757 be defined in redis_servers.
759 GF/02 Catch and remove uninitialized value warning in exiqsumm
760 Check for existence of @ARGV before looking at $ARGV[0]
762 JH/01 Replace the store_release() internal interface with store_newblock(),
763 which internalises the check required to safely use the old one, plus
764 the allocate and data copy operations duplicated in both (!) of the
765 extant use locations.
767 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
768 modifier. This matches the restriction on the commandline.
770 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
771 Previously only the last row was returned.
773 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
774 we assumed that tags in the header were well-formed, and parsed the
775 element content after inspecting only the first char of the tag.
776 Assumptions at that stage could crash the receive process on malformed
779 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
780 While running the DKIM ACL we operate on the Permanent memory pool so that
781 variables created with "set" persist to the DATA ACL. Also (at any time)
782 DNS lookups that fail create cache records using the Permanent pool. But
783 expansions release any allocations made on the current pool - so a dnsdb
784 lookup expansion done in the DKIM ACL releases the memory used for the
785 DNS negative-cache, and bad things result. Solution is to switch to the
786 Main pool for expansions.
787 While we're in that code, add checks on the DNS cache during store_reset,
788 active in the testsuite.
789 Problem spotted, and debugging aided, by Wolfgang Breyha.
791 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
792 When none of the hosts presented to a transport match an already-open
793 connection, close it and proceed with the list. Previously we would
794 queue the message. Spotted by Lena with Yahoo, probably involving
797 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
798 Previously a spurious "250 OK id=" response was appended to the proper
801 JH/08 The "support for" informational output now, which built with Content
802 Scanning support, has a line for the malware scanner interfaces compiled
803 in. Interface can be individually included or not at build time.
805 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
806 by the template makefile "src/EDITME". The "STREAM" support for an older
807 ClamAV interface method is removed.
809 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
810 rows affected is given instead).
812 JH/11 The runtime Berkeley DB library version is now additionally output by
813 "exim -d -bV". Previously only the compile-time version was shown.
815 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
816 SMTP connection. Previously, when one had more receipients than the
817 first, an abortive onward connection was made. Move to full support for
818 multiple onward connections in sequence, handling cutthrough connection
819 for all multi-message initiating connections.
821 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
822 routers. Previously, a multi-recipient message would fail to match the
823 onward-connection opened for the first recipient, and cause its closure.
825 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
826 a timeout on read on a GnuTLS initiating connection, resulting in the
827 initiating connection being dropped. This mattered most when the callout
828 was marked defer_ok. Fix to keep the two timeout-detection methods
831 JH/15 Relax results from ACL control request to enable cutthrough, in
832 unsupported situations, from error to silently (except under debug)
833 ignoring. This covers use with PRDR, frozen messages, queue-only and
836 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
838 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
839 metadata, resulting in a crash in free().
841 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
842 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
843 Broken also in d185889f4, with init system revamp.
845 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
846 Previously we abruptly closed the connection after reading a malware-
847 found indication; now we go on to read the "scan ok" response line,
850 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
851 ACL. Previously, a crash would result.
853 JH/19 Speed up macro lookups during configuration file read, by skipping non-
854 macro text after a replacement (previously it was only once per line) and
855 by skipping builtin macros when searching for an uppercase lead character.
857 JH/20 DANE support moved from Experimental to mainline. The Makefile control
858 for the build is renamed.
860 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
861 was allocated for every new TLS startup, meaning one per message. Fix
862 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
864 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
865 reported the original. Fix to report (as far as possible) the ACL
866 result replacing the original.
868 JH/23 Fix memory leak during multi-message connections using STARTTLS under
869 OpenSSL. Certificate information is loaded for every new TLS startup,
870 and the resources needed to be freed.
872 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
874 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
877 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
878 DATA response info to the (existing) per-recipient response info for
879 the "C=" log element. It can have useful tracking info from the
880 destination system. Patch from Simon Arlott.
882 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
883 length value. Previously this would segfault.
885 HS/02 Support Avast multiline protoocol, this allows passing flags to
886 newer versions of the scanner.
888 JH/28 Ensure that variables possibly set during message acceptance are marked
889 dead before release of memory in the daemon loop. This stops complaints
890 about them when the debug_store option is enabled. Discovered specifically
891 for sender_rate_period, but applies to a whole set of variables.
892 Do the same for the queue-runner and queue-list loops, for variables set
893 from spool message files. Do the same for the SMTP per-message loop, for
894 certain variables indirectly set in ACL operations.
896 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
897 as a multi-recipient message from a mailinglist manager). The coding had
898 an arbitrary cutoff number of characters while checking for more input;
899 enforced by writing a NUL into the buffer. This corrupted long / fast
900 input. The problem was exposed more widely when more pipelineing of SMTP
901 responses was introduced, and one Exim system was feeding another.
902 The symptom is log complaints of SMTP syntax error (NUL chars) on the
903 receiving system, and refused recipients seen by the sending system
904 (propating to people being dropped from mailing lists).
905 Discovered and pinpointed by David Carter.
907 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
908 replaced by the ${authresults } expansion.
910 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
912 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
913 allows proper process termination in container environments.
915 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
916 Previously the "final dot" had a newline after it; ensure it is CR,LF.
918 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
919 and "err_perm", deprecated since 4.83 when the RFC-defined words
920 "temperror" and "permerror" were introduced.
922 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
923 transport-filters or DKIM-signing. The restriction was lost in the
924 consolidation of verify-callout and delivery SMTP handling.
925 Extend the restriction to also cover ARC-signing.
927 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
928 in defer=pass mode supply a 450 to the initiator. Previously the message
931 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
932 tls_require_ciphers is used as before.
934 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
935 "pass_unscanned". Only tmpfails from the scanner are written to
936 the paniclog, as they may require admin intervention (permission
937 denied, license issues). Other scanner errors (like decompression
938 bombs) do not cause a paniclog entry.
940 JH/36 Fix reinitialisation of DKIM logging variable between messages.
941 Previously it was possible to log spurious information in receive log
944 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
945 triggered odd behaviour from Outlook Express clients.
947 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
950 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
951 since the IETF WG has not yet settled on that versus the original
952 "bare" representation.
954 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
955 Previously the millisecond value corrupted the output.
956 Fix also for syslog_pid=no and log_selector +pid, for which the pid
957 corrupted the output.
963 JH/01 Rework error string handling in TLS interface so that the caller in
964 more cases is responsible for logging. This permits library-sourced
965 string to be attached to addresses during delivery, and collapses
966 pairs of long lines into single ones.
968 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
969 during configuration. Wildcards are allowed and expanded.
971 JH/02 Rework error string handling in DKIM to pass more info back to callers.
972 This permits better logging.
974 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
975 do not close it down and have the child transport start it up again on
976 the passed-on TCP connection. Instead, proxy the child (and any
977 subsequent ones) for TLS via a unix-domain socket channel. Logging is
978 affected: the continued delivery log lines do not have any DNSSEC, TLS
979 Certificate or OCSP information. TLS cipher information is still logged.
981 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
982 identical IP addresses on different listening ports. Will also affect
985 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
986 add noisy ifdef guards to special-case this sillyness.
987 Patch from Bernd Kuhls.
989 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
990 than 255 are no longer allowed.
992 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
993 Disable the session-cache too, which might reduce our load. Since we
994 currrectly use a new context for every connection, both as server and
995 client, there is no benefit for these.
996 GnuTLS appears to not support tickets server-side by default (we don't
997 call gnutls_session_ticket_enable_server()) but client side is enabled
998 by default on recent versions (3.1.3 +) unless the PFS priority string
1001 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1002 <https://reproducible-builds.org/specs/source-date-epoch/>.
1004 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1005 the check for any unsuccessful recipients did not notice the limit, and
1006 erroneously found still-pending ones.
1008 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1009 MSG_MORE. Only in-clear (not on TLS connections).
1011 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1012 transport-filter is involved we can buffer the headers in memory for
1013 creating the signature, and read the spool data file once for the
1014 signature and again for transmission.
1016 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1017 4.77 as the kernel support then wasn't solid, having issues in 64bit
1018 mode. Now, it's been long enough. Add support for FreeBSD also.
1020 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1021 case where the routing stage had gathered several addresses to send to
1022 a host before calling the transport for the first, we previously failed
1023 to close down TLS in the old transport process before passing the TCP
1024 connection to the new process. The new one sent a STARTTLS command
1025 which naturally failed, giving a failed delivery and bloating the retry
1026 database. Investigation and fix prototype from Wolfgang Breyha.
1028 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1029 false-negatives in the check that the sender had not preempted a response
1030 or prompt from Exim (running as a server), due to that code's lack of
1031 awareness of the SMTP input buffering.
1033 PP/04 Add commandline_checks_require_admin option.
1034 Exim drops privileges sanely, various checks such as -be aren't a
1035 security problem, as long as you trust local users with access to their
1036 own account. When invoked by services which pass untrusted data to
1037 Exim, this might be an issue. Set this option in main configuration
1038 AND make fixes to the calling application, such as using `--` to stop
1041 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1042 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1043 responses to those, into a single TLS record each way (this usually means
1044 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1047 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1048 affects you only if you're dancing at the edge of the param size limits.
1049 If you are, and this message makes sense to you, then: raise the
1050 configured limit or use OpenSSL 1.1. Nothing we can do for older
1053 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1054 cmdline element to get the documented default one. Previously it was
1057 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1058 are unsuable for non-message-specific reasons - eg. connection timeout,
1059 banner-time rejection.
1061 JH/16 Fix logging of delivery remote port, when specified by router, under
1064 PP/06 Repair manualroute's ability to take options in any order, even if one
1065 is the name of a transport.
1068 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1070 JH/17 Change the list-building routines interface to use the expanding-string
1071 triplet model, for better allocation and copying behaviour.
1073 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1074 Previously it was constructed the first time a possibly-matching string
1075 was met in the configuration file input during startup; now it is done
1078 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1079 compatible one, to avoid the (poorly documented) possibility of a config
1080 file in the working directory redirecting the DB files, possibly correpting
1081 some existing file. CVE-2017-10140 assigned for BDB.
1083 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1084 cache-hot. Previously, although the result was properly cached, the
1085 initial verify call returned a defer.
1087 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1088 the main verify for receipient in uncached-mode.
1090 JH/22 Retire historical build files to an "unsupported" subdir. These are
1091 defined as "ones for which we have no current evidence of testing".
1093 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1094 if present. Previously it was ignored.
1096 JH/24 Start using specified-initialisers in C structure init coding. This is
1097 a C99 feature (it's 2017, so now considered safe).
1099 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1100 if was a fixed-sized field and bitmask ops via macros; it is now more
1103 PP/07 GitHub PR 56: Apply MariaDB build fix.
1104 Patch provided by Jaroslav Å karvada.
1106 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1107 during Coverity cleanups [4.87 JH/47]
1108 Diagnosis and fix provided by Michael Fischer v. Mollard.
1110 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1111 the right size to place the terminating semicolon on its own folded
1112 line, the header hash was calculated to an incorrect value thanks to
1113 the (relaxed) space the fold became.
1115 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1116 and confused the parent.
1118 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1119 which could crash as a result. This could lead to undeliverable messages.
1121 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1124 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1125 matters on fast-turnover and PID-randomising systems, which were getting
1126 out-of-order delivery.
1128 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1129 a possibly-overlapping copy. The symptom was that "Remote host closed
1130 connection in response to HELO" was logged instead of the actual 4xx
1133 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1134 Previously only that bufferd was discarded, resulting in SYMTP command
1137 JH/32 DKIM: when a message has multiple signatures matching an identity given
1138 in dkim_verify_signers, run the dkim acl once for each. Previously only
1139 one run was done. Bug 2189.
1141 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1142 "panic the current process" to "deliberately defer". The panic log is
1143 still written with the problem list name; the mail and reject logs now
1144 get a temp-reject line for the message that was being handled, saying
1145 something like "domains check lookup or other defer". The SMTP 451
1146 message is still "Temporary local problem".
1148 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1149 A crafted sequence of BDAT commands could result in in-use memory beeing
1150 freed. CVE-2017-16943.
1152 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1153 from SMTP input. Previously it was always done; now only done for DATA
1154 and not BDAT commands. CVE-2017-16944.
1156 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1157 to the message (such as an overlong header line). Previously this was
1158 not done and we did not exit BDAT mode. Followon from the previous item
1159 though a different problem.
1165 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1166 than -2003 did; needs libidn2 in addition to libidn.
1168 JH/02 The path option on a pipe transport is now expanded before use.
1170 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1171 Patch provided by "Björn", documentation fix added too.
1173 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1174 missing a wire-to-host endian conversion.
1176 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1177 close after a BDAT command line could be taken as a following command,
1178 giving a synch failure. Fix by only checking for synch immediately
1179 before acknowledging the chunk.
1181 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1182 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1183 macro. Patches provided by Josh Soref.
1185 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1186 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1187 by IANA as a service extension. However, John Klensin suggests that we
1190 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1191 the dkim code may be unix-mode line endings rather than smtp wire-format
1192 CRLF, so prepend a CR to any bare LF.
1194 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1195 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1197 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1198 the first were themselves being wrongly included in the feed into dkim
1199 processing; with most chunk sizes in use this resulted in an incorrect
1200 body hash calculated value.
1202 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1203 DKIM signature block, for verification. Although advised against by
1204 standards it is specifically not ruled illegal.
1206 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1208 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1209 missing a body hash (the bh= tag).
1211 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1212 It seems that HAProxy sends the Proxy Protocol information in clear and
1213 only then does a TLS startup, so do the same.
1215 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1216 TCP connections (such as for Spamd) unless the daemon successfully set
1217 Fast Open mode on its listening sockets. This fixes breakage seen on
1218 too-old kernels or those not configured for Fast Open, at the cost of
1219 requiring both directions being enabled for TFO, and TFO never being used
1220 by non-daemon-related Exim processes.
1222 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1223 endings, at least on the first header line. Try to canonify any that get
1224 past that check, despite the cost.
1226 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1227 now limited to an arbitrary five deep, while parsing addresses with the
1228 strip_excess_angle_brackets option enabled.
1230 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1231 instead leave the unprompted TLS handshake in socket buffer for the
1232 TLS library to consume.
1234 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1236 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1238 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1239 region in one operation, for speed, and this leaves assigned pointers
1240 dangling. Add checks run only under the testsuite which checks all
1241 variables at a store-reset and panics on a dangling pointer; add code
1242 explicitly nulling out all the variables discovered. Fixes one known
1243 bug: a transport crash, where a dangling pointer for $sending_ip_address
1244 originally assigned in a verify callout, is re-used.
1246 PP/06 Drop '.' from @INC in various Perl scripts.
1248 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1250 PP/08 Reduce a number of compilation warnings under clang; building with
1251 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1252 should be warning-free.
1254 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1256 HS/01 Fix portability problems introduced by PP/08 for platforms where
1257 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1259 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1260 chunk. This allows us to accept broken chunked messages. We need a more
1261 general solution here.
1263 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1264 already-broken messages in the queue.
1266 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1268 JH/19 Fix reference counting bug in routing-generated-address tracking.
1274 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1275 supports it and a size is available (ie. the sending peer gave us one).
1277 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1278 years of being deprecated). The replacements are the ACLs
1279 acl_smtp_mime and acl_not_smtp_mime.
1281 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1282 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1283 or even an in-clear connection were permitted. Now, if the host lookup
1284 was dnssec and dane was requested then the host is only used if the
1285 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1286 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1287 if one fails this test.
1288 This means that a poorly-configured remote DNS will make it incommunicado;
1289 but it protects against a DNS-interception attack on it.
1291 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1292 non-noisy when a race steals the message being considered.
1294 JH/05 If main configuration option tls_certificate is unset, generate a
1295 self-signed certificate for inbound TLS connections.
1297 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1298 in rewrites and routers.
1300 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1301 and logged a warning sing 4.83; now they are a configuration file error.
1303 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1304 (lacking @domain). Apply the same qualification processing as RCPT.
1306 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1308 JH/10 Support ${sha256:} applied to a string (as well as the previous
1311 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1312 a cutthrough deliver is pending, as we always want to make a connection.
1313 This also avoids re-routing the message when later placing the cutthrough
1314 connection after a verify cache hit.
1315 Do not update it with the verify result either.
1317 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1318 when routing results in more than one destination address.
1320 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1321 signing (which inhibits the cutthrough capability). Previously only
1322 the presence of an option was tested; now an expansion evaluating as
1323 empty is permissible (obviously it should depend only on data available
1324 when the cutthrough connection is made).
1326 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1327 the relevant preceding SMTP command did not note the pipelining mode.
1329 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1330 Previously they were not counted.
1332 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1333 as one having no matching records. Previously we deferred the message
1334 that needed the lookup.
1336 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1337 distinguished as "(=".
1339 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1340 for missing MX records. Previously it only worked for missing A records.
1342 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1344 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1345 after the data-go-ahead and data-ack. Patch from Jason Betts.
1347 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1348 even for a "none" policy. Patch from Tony Meyer.
1350 JH/22 Fix continued use of a connection for further deliveries. If a port was
1351 specified by a router, it must also match for the delivery to be
1354 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1355 When one of the recipients of a message was unsuitable for the connection
1356 (has no matching addresses), we lost track of needing to mark it
1357 deferred. As a result mail would be lost.
1359 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1361 JH/25 Decoding ACL controls is now done using a binary search; the source code
1362 takes up less space and should be simpler to maintain. Merge the ACL
1363 condition decode tables also, with similar effect.
1365 JH/26 Fix problem with one_time used on a redirect router which returned the
1366 parent address unchanged. A retry would see the parent address marked as
1367 delivered, so not attempt the (identical) child. As a result mail would
1370 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1371 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1372 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1375 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1376 Main config options check_{log,spool}_{inodes,space} are now
1377 100 inodes, 10MB unless set otherwise in the configuration.
1379 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1380 Previously it only applied to the main-section connection policy
1383 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1385 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1386 by me. Added RFC7919 DH primes as an alternative.
1388 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1389 are not in the system include path.
1391 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1392 GnuTLS, when a session startup failed (eg because the client disconnected)
1393 Exim did stdio operations after fclose. This was exposed by a recent
1394 change which nulled out the file handle after the fclose.
1396 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1397 signed directly by the cert-signing cert, rather than an intermediate
1398 OCSP-signing cert. This is the model used by LetsEncrypt.
1400 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1402 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1403 an incoming connection.
1405 HS/02 Bug 1802: Do not half-close the connection after sending a request
1408 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1409 fallback to "prime256v1".
1411 JH/34 SECURITY: Use proper copy of DATA command in error message.
1412 Could leak key material. Remotely exploitable. CVE-2016-9963.
1418 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1419 and 3.4.4 - once the server is enabled to respond to an OCSP request
1420 it does even when not requested, resulting in a stapling non-aware
1421 client dropping the TLS connection.
1423 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1424 support variable-length bit vectors. No functional change.
1426 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1427 The I= interface field on outgoing lines is now after the H= remote
1428 host field, same as incoming lines. There is a separate
1429 outgoing_interface log selector which allows you to disable the
1432 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1433 If not running log_selector +smtp_connection the mainlog would be held
1434 open indefinitely after a "too many connections" event, including to a
1435 deleted file after a log rotate. Leave the per net connection logging
1436 leaving it open for efficiency as that will be quickly detected by the
1437 check on the next write.
1439 HS/01 Bug 1671: Fix post transport crash.
1440 Processing the wait-<transport> messages could crash the delivery
1441 process if the message IDs didn't exist for some reason. When
1442 using 'split_spool_directory=yes' the construction of the spool
1443 file name failed already, exposing the same netto behaviour.
1445 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1446 mime_regex ACL conditions.
1448 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1449 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1450 to HELO, local diagnostic string.
1452 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1453 log line to debug. Even when configured with a tls authenticator many
1454 client connections are expected to not authenticate in this way, so
1455 an authenticate fail is not an error.
1457 HS/02 Add the Exim version string to the process info. This way exiwhat
1458 gives some more detail about the running daemon.
1460 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1461 matter for fast-change records such as DNSBLs.
1463 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1464 retry record, even if constant. There may be multiple transports with
1465 different interface settings and the retry behaviour needs to be kept
1468 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1470 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1472 JH/10 Bug 840: fix log_defer_output option of pipe transport
1474 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1475 hosts_randomize. This matters a lot when combined with mua_wrapper.
1477 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1478 ${quote_pgsql:<string>} operator.
1480 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1482 JH/14 Change header file name for freeradius-client. Relevant if compiling
1483 with Radius support; from the Gentoo tree and checked under Fedora.
1485 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1487 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1488 option transport_filter, meaning no filtering.
1490 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1492 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1493 defaults to "*" (all hosts). The variable is now available when not built
1494 with TLS, default unset, mainly to enable keeping the testsuite sane.
1495 If a server certificate is not supplied (via tls_certificate) an error is
1496 logged, and clients will find TLS connections fail on startup. Presumably
1497 they will retry in-clear.
1498 Packagers of Exim are strongly encouraged to create a server certificate
1499 at installation time.
1501 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1502 with the $config_file variable.
1504 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1505 in transport context, after the attempt, and per-recipient. The latter type
1506 is per host attempted. The event data is the error message, and the errno
1507 information encodes the lookup type (A vs. MX) used for the (first) host,
1508 and the trailing two digits of the smtp 4xx response.
1510 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1511 to write to mainlog (or rejectlog, paniclog) in the window between file
1512 creation and permissions/ownership being changed. Particularly affects
1513 installations where exicyclog is run as root, rather than exim user;
1514 result is that the running daemon panics and dies.
1516 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1518 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1519 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1520 "pri" and "weight". Note that the previous implicit priority given by the
1521 list order is no longer honoured.
1523 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1524 for DKIM processing.
1526 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1527 by defining SUPPORT_SOCKS.
1529 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1530 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1531 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1532 variables are renamed to proxy_{local,external}_{address,port}.
1534 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1535 for a build by defining SUPPORT_I18N
1537 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1538 of the query string, and make ${quote_redis:} do that quoting.
1540 JH/29 Move Events support from Experimental to mainline, enabled by default
1541 and removable for a build by defining DISABLE_EVENT.
1543 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1545 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1546 cached by the daemon.
1548 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1549 by defining LOOKUP_REDIS. The libhiredis library is required.
1551 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1552 keys are given for lookup.
1554 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1555 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1556 only supported when built with TLS support. The PolarSSL SHA routines
1557 are still used when the TLS library is too old for convenient support.
1559 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1560 openssl_options), for security. OpenSSL forces this from version 1.1.0
1561 server-side so match that on older versions.
1563 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1564 allocation for $value could be released as the expansion processing
1565 concluded, but leaving the global pointer active for it.
1567 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1568 and to use the domains and local_parts ACL conditions.
1570 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1571 incorrectly not doubled on cutthrough transmission, hence seen as a
1572 body-termination at the receiving system - resulting in truncated mails.
1573 Commonly the sender saw a TCP-level error, and retransmitted the message
1574 via the normal store-and-forward channel. This could result in duplicates
1575 received - but deduplicating mailstores were liable to retain only the
1576 initial truncated version.
1578 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1580 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1582 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1583 we're in there, support oversigning also; bug 1309.
1585 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1587 HS/04 Add support for keep_environment and add_environment options.
1589 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1590 either intentional arithmetic overflow during PRNG, or testing config-
1593 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1594 delivery resulted in actual delivery. Cancel cutthrough before DATA
1597 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1598 rejects a recipient: pass the reject to the originator.
1600 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1601 Many were false-positives and ignorable, but it's worth fixing the
1604 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1605 for the new environment-manipulation done at startup. Move the routines
1606 from being local to tls.c to being global via the os.c file.
1608 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1609 an extract embedded as result-arg for a map, the first arg for extract
1610 is unavailable so we cannot tell if this is a numbered or keyed
1611 extraction. Accept either.
1617 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1620 JH/02 The smtp transport option "multi_domain" is now expanded.
1622 JH/03 The smtp transport now requests PRDR by default, if the server offers
1625 JH/04 Certificate name checking on server certificates, when exim is a client,
1626 is now done by default. The transport option tls_verify_cert_hostnames
1627 can be used to disable this per-host. The build option
1628 EXPERIMENTAL_CERTNAMES is withdrawn.
1630 JH/05 The value of the tls_verify_certificates smtp transport and main options
1631 default to the word "system" to access the system default CA bundle.
1632 For GnuTLS, only version 3.0.20 or later.
1634 JH/06 Verification of the server certificate for a TLS connection is now tried
1635 (but not required) by default. The verification status is now logged by
1636 default, for both outbound TLS and client-certificate supplying inbound
1639 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1642 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1643 Status Notification (bounce) messages are now MIME format per RFC 3464.
1644 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1645 under the control of the dsn_advertise_hosts option, and routers may
1646 have a dsn_lasthop option.
1648 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1649 default, modifiable by a malware= option. The list separator for
1650 the options can now be changed in the usual way. Bug 68.
1652 JH/10 The smtp_receive_timeout main option is now expanded before use.
1654 JH/11 The incoming_interface log option now also enables logging of the
1655 local interface on delivery outgoing connections.
1657 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1658 if the interface and destination host and port all match.
1660 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1663 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1664 Patch from Andrew Lewis.
1666 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1667 now supports optional time-restrictions, weighting, and priority
1668 modifiers per server. Patch originally by <rommer@active.by>.
1670 JH/16 The spamd_address main option now supports a mixed list of local
1671 and remote servers. Remote servers can be IPv6 addresses, and
1672 specify a port-range.
1674 JH/17 Bug 68: The spamd_address main option now supports an optional
1675 timeout value per server.
1677 JH/18 Bug 1581: Router and transport options headers_add/remove can
1678 now have the list separator specified.
1680 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1683 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1686 JH/21 Support for the A6 type of dns record is withdrawn.
1688 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1689 rather than the verbs used.
1691 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1692 from 255 to 1024 chars.
1694 JH/24 Verification callouts now attempt to use TLS by default.
1696 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1697 are generic router options now. The defaults didn't change.
1699 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1700 Original patch from Alexander Shikoff, worked over by JH.
1702 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1703 files if ZCAT_COMMAND is not executable.
1705 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1707 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1709 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1710 Normally benign, it bites when the pair was led to by a CNAME;
1711 modern usage is to not canonicalize the domain to a CNAME target
1712 (and we were inconsistent anyway for A-only vs AAAA+A).
1714 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1716 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1717 when evaluating $sender_host_dnssec.
1719 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1720 $sender_helo_dnssec variable.
1722 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1724 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1726 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1728 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1729 documented as working, but never had. Support all but $spam_report.
1731 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1732 added for tls authenticator.
1734 HS/03 Add perl_taintmode main config option
1740 TL/01 When running the test suite, the README says that variables such as
1741 no_msglog_check are global and can be placed anywhere in a specific
1742 test's script, however it was observed that placement needed to be near
1743 the beginning for it to behave that way. Changed the runtest perl
1744 script to read through the entire script once to detect and set these
1745 variables, reset to the beginning of the script, and then run through
1746 the script parsing/test process like normal.
1748 TL/02 The BSD's have an arc4random API. One of the functions to induce
1749 adding randomness was arc4random_stir(), but it has been removed in
1750 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1751 function when detected.
1753 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1754 cause callback expansion.
1756 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1757 syntax errors in an expansion can be treated as a string instead of
1758 logging or causing an error, due to the internal use of bool_lax
1759 instead of bool when processing it.
1761 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1762 server certificates when making smtp deliveries.
1764 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1766 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1768 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1770 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1771 Merged patch from Sebastian Wiedenroth.
1773 JH/05 Fix results-pipe from transport process. Several recipients, combined
1774 with certificate use, exposed issues where response data items split
1775 over buffer boundaries were not parsed properly. This eventually
1776 resulted in duplicates being sent. This issue only became common enough
1777 to notice due to the introduction of connection certificate information,
1778 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1780 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1781 size buffer was used, resulting in syntax errors when an expansion
1784 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1785 version 3.3.6 or later.
1787 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1788 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1789 both become "event_action", the variables become $event_name, $event_data
1790 and $event_defer_errno. There is a new variable $verify_mode, usable in
1791 routers, transports and related events. The tls:cert event is now also
1792 raised for inbound connections, if the main configuration event_action
1795 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1796 early OCSP support, but no stapling (appears to be less than 1.0.0).
1798 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1799 server certificate names available under the smtp transport option
1800 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1803 JH/10 Time-related extraction expansions from certificates now use the main
1804 option "timezone" setting for output formatting, and are consistent
1805 between OpenSSL and GnuTLS compilations. Bug 1541.
1807 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1808 encoded parameter in the incoming message. Bug 1558.
1810 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1811 include certificate info, eximon was claiming there were spoolfile
1814 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1816 JH/14 Log delivery-related information more consistently, using the sequence
1817 "H=<name> [<ip>]" wherever possible.
1819 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1820 are problematic for Debian distribution, omit them from the release
1823 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1825 JH/16 Fix string representation of time values on 64bit time_t architectures.
1828 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1829 output list separator was used.
1834 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1835 checkers that were complaining about end of non-void function with no
1838 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1839 This was a regression introduced in 4.83 by another bugfix.
1841 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1843 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1844 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1850 TF/01 Correctly close the server side of TLS when forking for delivery.
1852 When a message was received over SMTP with TLS, Exim failed to clear up
1853 the incoming connection properly after forking off the child process to
1854 deliver the message. In some situations the subsequent outgoing
1855 delivery connection happened to have the same fd number as the incoming
1856 connection previously had. Exim would try to use TLS and fail, logging
1857 a "Bad file descriptor" error.
1859 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1860 utilities have not been installed.
1862 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1863 temporary space as the ACL may create new global variables.
1865 TL/01 LDAP support uses per connection or global context settings, depending
1866 upon the detected version of the libraries at build time.
1868 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1869 to extract and use the src ip:port in logging and expansions as if it
1870 were a direct connection from the outside internet. PPv2 support was
1871 updated based on HAProxy spec change in May 2014.
1873 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1875 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1876 Properly escape header and check for NULL return.
1878 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1881 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1883 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1884 characters in header names, implemented as a verify condition.
1885 Contributed by Michael Fischer v. Mollard.
1887 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1888 results permerror and temperror. Previous values are deprecated but
1889 still accepted. In a future release, err_perm and err_temp will be
1890 completely removed, which will be a backward incompatibility if the
1891 ACL tests for either of these two old results. Patch contributed by
1892 user bes-internal on the mailing list.
1894 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1896 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1897 selectors, in both main and reject logs.
1899 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1902 JH/07 Add malware type "sock" for talking to simple daemon.
1904 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1906 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1907 routers/transports under cutthrough routing.
1909 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1910 numbers. Touch up "bool" conditional to keep the same definition.
1912 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1914 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1916 JH/12 Expand items in router/transport headers_add or headers_remove lists
1917 individually rather than the list as a whole. Bug 1452.
1919 Required for reasonable handling of multiple headers_ options when
1920 they may be empty; requires that headers_remove items with embedded
1921 colons must have them doubled (or the list-separator changed).
1923 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1924 view the policy declared in the DMARC record. Currently, $dmarc_status
1925 is a combined value of both the record presence and the result of the
1928 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1930 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1931 dnslookup router and the smtp transport (applying to the forward
1934 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1935 of ldap servers used for a specific lookup. Patch provided by Heiko
1938 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1939 New variable $lookup_dnssec_authenticated for observability.
1941 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1942 Patch submitted by Lars Timman.
1944 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1946 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1947 Requires trusted mode and valid format message id, aborts otherwise.
1948 Patch contributed by Heiko Schlichting.
1950 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1951 certextract with support for various fields. Bug 1358.
1953 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1954 is requested by default, modifiable by smtp transport option
1957 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1958 operate on certificate variables to give certificate fingerprints
1959 Also new ${sha256:cert_variable}.
1961 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1963 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1964 Christian Aistleitner.
1966 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1968 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1969 file. Patch from Wolfgang Breyha.
1971 JH/25 Expand the coverage of the delivery $host and $host_address to
1972 client authenticators run in verify callout. Bug 1476.
1974 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1975 align with daemon_smtp_ports. Bug 72.
1977 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1978 support and error reporting did not work properly.
1980 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1981 and is readable. Patch from Andrew Colin Kissa.
1983 TL/14 Enhance documentation of ${run expansion and how it parses the
1984 commandline after expansion, particularly in the case when an
1985 unquoted variable expansion results in an empty value.
1987 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1989 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1990 by renaming away from it. Addresses GH issue 15, reported by
1993 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1995 TL/15 SECURITY: prevent double expansion in math comparison functions
1996 (can expand unsanitized data). Not remotely exploitable.
2003 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2005 PP/02 Make -n do something, by making it not do something.
2006 When combined with -bP, the name of an option is not output.
2008 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2011 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2012 $sender_host_name and config options to manage this, and basic check
2015 PP/05 DSCP support for outbound connections and control modifier for inbound.
2017 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2018 (Only plugin which currently uses this is kerberos4, which nobody should
2019 be using, but we should make it available and other future plugins might
2020 conceivably use it, even though it would break NAT; stuff *should* be
2021 using channel bindings instead).
2023 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2024 name; added for Sendmail compatibility; requires admin caller.
2025 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2026 just ignore it); requires trusted caller.
2027 Also parse but ignore: -Ac -Am -X<logfile>
2030 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2032 TL/02 Add +smtp_confirmation as a default logging option.
2034 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2035 Patch by Magnus Holmgren from 2007-02-20.
2037 TL/04 Bugzilla 1281 - Spec typo.
2038 Bugzilla 1283 - Spec typo.
2039 Bugzilla 1290 - Spec grammar fixes.
2041 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2043 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2045 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2046 mailing list by by Dmitry Isaikin.
2048 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2050 JH/02 Support "G" suffix to numbers in ${if comparisons.
2052 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2054 NM/01 Bugzilla 1197 - Spec typo
2055 Bugzilla 1196 - Spec examples corrections
2057 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2059 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2060 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2063 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2064 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2066 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2067 "acl {{name}{arg}...}", and optional args on acl condition
2070 JH/05 Permit multiple router/transport headers_add/remove lines.
2072 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2074 JH/07 Avoid using a waiting database for a single-message-only transport.
2075 Performance patch from Paul Fisher. Bugzilla 1262.
2077 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2080 JH/09 Add $headers_added variable, with content from use of ACL modifier
2081 add_header (but not yet added to the message). Bugzilla 199.
2083 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2084 Pulled from Bugzilla 817 by Wolfgang Breyha.
2086 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2088 (nb: this is the same fix as in Exim 4.80.1)
2090 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2093 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2096 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2098 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2099 advertise SMTP AUTH mechanism to us, instead of a generic
2100 protocol violation error. Also, make Exim more robust to bad
2101 data from the Dovecot auth socket.
2103 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2105 When a queue runner is handling a message, Exim first routes the
2106 recipient addresses, during which it prunes them based on the retry
2107 hints database. After that it attempts to deliver the message to
2108 any remaining recipients. It then updates the hints database using
2111 So if a recipient address works intermittently, it can get repeatedly
2112 deferred at routing time. The retry hints record remains fresh so the
2113 address never reaches the final cutoff time.
2115 This is a fairly common occurrence when a user is bumping up against
2116 their storage quota. Exim had some logic in its local delivery code
2117 to deal with this. However it did not apply to per-recipient defers
2118 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2120 This change adds a proper retry rule check during routing so that the
2121 final cutoff time is checked against the message's age. We only do
2122 this check if there is an address retry record and there is not a
2123 domain retry record; this implies that previous attempts to handle
2124 the address had the retry_use_local_parts option turned on. We use
2125 this as an approximation for the destination being like a local
2126 delivery, as in LMTP.
2128 I suspect this new check makes the old local delivery cutoff check
2129 redundant, but I have not verified this so I left the code in place.
2131 TF/02 Correct gecos expansion when From: is a prefix of the username.
2133 Test 0254 submits a message to Exim with the header
2137 When I ran the test suite under the user fanf2, Exim expanded
2138 the header to contain my full name, whereas it should have added
2139 a Resent-Sender: header. It erroneously treats any prefix of the
2140 username as equal to the username.
2142 This change corrects that bug.
2144 GF/01 DCC debug and logging tidyup
2145 Error conditions log to paniclog rather than rejectlog.
2146 Debug lines prefixed by "DCC: " to remove any ambiguity.
2148 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2150 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2151 Bug spotted by Jeremy Harris; was flawed since initial commit.
2152 Would have resulted in OCSP responses post-SNI triggering an Exim
2153 NULL dereference and crash.
2155 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2157 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2158 Bug detection, analysis and fix by Samuel Thibault.
2159 Bugzilla 1331, Debian bug #698092.
2161 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2163 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2164 Server implementation by Todd Lyons, client by JH.
2165 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2166 config variable "prdr_enable" controls whether the server
2167 advertises the facility. If the client requests PRDR a new
2168 acl_data_smtp_prdr ACL is called once for each recipient, after
2169 the body content is received and before the acl_smtp_data ACL.
2170 The client is controlled by both of: a hosts_try_prdr option
2171 on the smtp transport, and the server advertisement.
2172 Default client logging of deliveries and rejections involving
2173 PRDR are flagged with the string "PRDR".
2175 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2176 fclose(). Diagnosis by Todd Lyons.
2178 PP/17 Update configure.default to handle IPv6 localhost better.
2179 Patch by Alain Williams (plus minor tweaks).
2182 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2183 This is now consistent with GnuTLS, and is now documented: the
2184 previous undocumented portable approach to treating the option as
2185 unset was to force an expansion failure. That still works, and
2186 an empty string is now equivalent.
2188 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2189 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2190 not performing validation itself.
2192 PP/20 Added force_command boolean option to pipe transport.
2193 Patch from Nick Koston, of cPanel Inc.
2195 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2198 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2200 PP/21 Fix eximon continuous updating with timestamped log-files.
2201 Broken in a format-string cleanup in 4.80, missed when I repaired the
2202 other false fix of the same issue.
2203 Report and fix from Heiko Schlichting.
2206 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2207 Report from Prashanth Katuri.
2209 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2210 It's SecureTransport, so affects any MacOS clients which use the
2211 system-integrated TLS libraries, including email clients.
2213 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2214 using a MIME ACL for non-SMTP local injection.
2215 Report and assistance in diagnosis by Warren Baker.
2217 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2219 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2221 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2222 last id that failed so it may be referenced in subsequent ACL's.
2224 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2227 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2228 ldap library initialization, allowing self-signed CA's to be
2229 used. Also properly sets require_cert option later in code by
2230 using NULL (global ldap config) instead of ldap handle (per
2231 session). Bug diagnosis and testing by alxgomz.
2233 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2234 the src/util/ subdirectory.
2236 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2237 renamed to Transport Post Delivery Action by Jeremy Harris, as
2240 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2241 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2242 redis_servers = needs to be configured which will be used by the redis
2243 lookup. Patch from Warren Baker, of The Packet Hub.
2245 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2247 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2248 hostname or reverse DNS when processing a host list. Used suggestions
2249 from multiple comments on this bug.
2251 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2253 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2254 Missed a few lines, added it to make the runtest require no keyboard
2257 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2258 contains upper case chars. Make router use caseful_local_part.
2260 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2261 support when GnuTLS has been built with p11-kit.
2267 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2269 This, or similar/improved, will also be change PP/11 of 4.82.
2275 PP/01 Handle short writes when writing local log-files.
2276 In practice, only affects FreeBSD (8 onwards).
2277 Bugzilla 1053, with thanks to Dmitry Isaikin.
2279 NM/01 Bugzilla 949 - Documentation tweak
2281 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2284 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2286 PP/02 Implemented gsasl authenticator.
2288 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2290 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2291 `pkg-config foo` for cflags/libs.
2293 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2294 with rest of GSASL and with heimdal_gssapi.
2296 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2297 `pkg-config foo` for cflags/libs for the TLS implementation.
2299 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2300 properties get this fed in as external SSF. A number of robustness
2301 and debugging improvements to the cyrus_sasl authenticator.
2303 PP/08 cyrus_sasl server now expands the server_realm option.
2305 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2306 Patch by Jeremy Harris.
2308 PP/10 Added dbmjz lookup type.
2310 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2312 PP/12 MAIL args handles TAB as well as SP, for better interop with
2313 non-compliant senders.
2314 Analysis and variant patch by Todd Lyons.
2316 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2317 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2318 Patch from Dirk Mueller <dmueller@suse.com>
2320 PP/13 tls_peerdn now print-escaped for spool files.
2321 Observed some $tls_peerdn in wild which contained \n, which resulted
2322 in spool file corruption.
2324 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2325 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2326 or write after TLS renegotiation, which otherwise led to messages
2329 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2330 as a tracking header (ie: a signed header comes before the signature).
2331 Patch from Wolfgang Breyha.
2333 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2334 comma-sep list; embedded commas doubled.
2336 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2338 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2340 Report and patch from Dmitry Banschikov.
2342 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2343 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2344 failures. We appear to now support TLS1.1+ with Exim.
2346 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2347 lets Exim select keys and certificates based upon TLS SNI from client.
2348 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2349 before an outbound SMTP session. New log_selector, +tls_sni.
2351 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2352 NULL dereference. Report and patch from Alun Jones.
2354 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2355 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2356 Not seeing resolver debug output on NetBSD, but suspect this is a
2357 resolver implementation change.
2359 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2360 Left warnings. Added "eximon gdb" invocation mode.
2362 PP/21 Defaulting "accept_8bitmime" to true, not false.
2364 PP/22 Added -bw for inetd wait mode support.
2366 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2367 locate the relevant includes and libraries. Made this the default.
2369 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2370 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2372 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2373 This may cause build issues on older platforms.
2375 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2376 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2377 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2378 Added SNI support via GnuTLS too.
2379 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2381 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2383 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2384 Applied second patch from Janne, implementing suggestion to default
2385 multiple-strings-in-record handling to match SPF spec.
2387 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2389 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2390 read-only, out of scope).
2391 Patch from Wolfgang Breyha, report from Stuart Northfield.
2393 PP/29 Fix three issues highlighted by clang analyser static analysis.
2394 Only crash-plausible issue would require the Cambridge-specific
2395 iplookup router and a misconfiguration.
2396 Report from Marcin Mirosław.
2398 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2400 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2401 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2402 As part of this, removing so much warning spew let me fix some minor
2403 real issues in debug logging.
2405 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2406 assignment on my part. Fixed.
2408 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2409 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2410 Janne Snabb (who went above and beyond: thank you).
2412 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2413 string otherwise requires a connection and a bunch more work and it's
2414 relatively easy to get wrong. Should also expose TLS library linkage
2417 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2418 64-bit ${eval} (JH/03).
2420 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2421 GNU libc to support some of the 64-bit stuff, should not lead to
2422 conflicts. Defined before os.h is pulled in, so if a given platform
2423 needs to override this, it can.
2425 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2426 protection layer was required, which is not implemented.
2427 Bugzilla 1254, patch from Wolfgang Breyha.
2429 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2430 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2431 tls_dhparam take prime identifiers. Also unbreak combination of
2432 OpenSSL+DH_params+TLSSNI.
2434 PP/39 Disable SSLv2 by default in OpenSSL support.
2440 PP/01 Solaris build fix for Oracle's LDAP libraries.
2441 Bugzilla 1109, patch from Stephen Usher.
2443 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2445 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2448 TF/02 Fix a couple more cases where we did not log the error message
2449 when unlink() failed. See also change 4.74-TF/03.
2451 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2452 lock up or crash if it happened to be inside a call to libc when it
2453 got a SIGUSR1 from exiwhat.
2455 The SIGUSR1 handler appends the current process status to the process
2456 log which is later printed by exiwhat. It used to use the general
2457 purpose logging code to do this, but several functions it calls are
2458 not safe for signals.
2460 The new output code in the SIGUSR1 handler is specific to the process
2461 log, and simple enough that it's easy to inspect for signal safety.
2462 Removing some special cases also simplifies the general logging code.
2463 Removing the spurious timestamps from the process log simplifies
2466 TF/04 Improved ratelimit ACL condition.
2468 The /noupdate option has been deprecated in favour of /readonly which
2469 has clearer semantics. The /leaky, /strict, and /readonly update modes
2470 are mutually exclusive. The update mode is no longer included in the
2471 database key; it just determines when the database is updated. (This
2472 means that when you upgrade Exim will forget old rate measurements.)
2474 Exim now checks that the per_* options are used with an update mode that
2475 makes sense for the current ACL. For example, when Exim is processing a
2476 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2477 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2478 must specify per_mail/readonly. If you omit the update mode it defaults to
2479 /leaky where that makes sense (as before) or /readonly where required.
2481 The /noupdate option is now undocumented but still supported for
2482 backwards compatibility. It is equivalent to /readonly except that in
2483 ACLs where /readonly is required you may specify /leaky/noupdate or
2484 /strict/noupdate which are treated the same as /readonly.
2486 A useful new feature is the /count= option. This is a generalization
2487 of the per_byte option, so that you can measure the throughput of other
2488 aggregate values. For example, the per_byte option is now equivalent
2489 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2491 The per_rcpt option has been generalized using the /count= mechanism
2492 (though it's more complicated than the per_byte equivalence). When it is
2493 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2494 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2495 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2496 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2497 Note that using per_rcpt with a non-readonly update mode in more than
2498 one ACL will cause the recipients to be double-counted. (The per_mail
2499 and per_byte options don't have this problem.)
2501 The handling of very low rates has changed slightly. If the computed rate
2502 is less than the event's count (usually one) then this event is the first
2503 after a long gap. In this case the rate is set to the same as this event's
2504 count, so that the first message of a spam run is counted properly.
2506 The major new feature is a mechanism for counting the rate of unique
2507 events. The new per_addr option counts the number of different
2508 recipients that someone has sent messages to in the last time period. It
2509 behaves like per_rcpt if all the recipient addresses are different, but
2510 duplicate recipient addresses do not increase the measured rate. Like
2511 the /count= option this is a general mechanism, so the per_addr option
2512 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2513 example, measure the rate that a client uses different sender addresses
2514 with the options per_mail/unique=$sender_address. There are further
2515 details in the main documentation.
2517 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2519 TF/06 Removed a few PCRE remnants.
2521 TF/07 Automatically extract Exim's version number from tags in the git
2522 repository when doing development or release builds.
2524 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2525 Bugzilla 879. Patch from Paul Fisher.
2527 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2528 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2531 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2533 PP/05 Variable $av_failed, true if the AV scanner deferred.
2534 Bugzilla 1078. Patch from John Horne.
2536 PP/06 Stop make process more reliably on build failure.
2537 Bugzilla 1087. Patch from Heiko Schlittermann.
2539 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2540 Bugzilla 1089. Patch from Heiko Schlittermann.
2542 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2543 Bugzilla 1131. Patch from Holger Weiß.
2545 PP/09 Handle IPv6 addresses with SPF.
2546 Bugzilla 860. Patch from Wolfgang Breyha.
2548 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2550 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2553 PP/11 match_* no longer expand right-hand-side by default.
2554 New compile-time build option, EXPAND_LISTMATCH_RHS.
2555 New expansion conditions, "inlist", "inlisti".
2557 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2559 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2561 PP/14 fix log_write() format string regression from TF/03.
2562 Bugzilla 1152. Patch from Dmitry Isaikin.
2568 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2570 PP/02 Harmonised TLS library version reporting; only show if debugging.
2571 Layout now matches that introduced for other libraries in 4.74 PP/03.
2573 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2575 PP/04 New "dns_use_edns0" global option.
2577 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2580 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2581 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2583 TK/01 Updated PolarSSL code to 0.14.2.
2584 Bugzilla 1097. Patch from Andreas Metzler.
2586 PP/07 Catch divide-by-zero in ${eval:...}.
2587 Fixes bugzilla 1102.
2589 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2592 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2593 format-string attack -- SECURITY: remote arbitrary code execution.
2595 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2596 time unintentionally subject to list matching rules, letting the header
2597 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2598 arbitrary string expansion). This allowed for information disclosure.
2600 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2601 INT_MIN/-1 -- value coerced to INT_MAX.
2607 NM/01 Workaround for PCRE version dependency in version reporting
2610 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2611 This fixes portability to compilers other than gcc, notably
2612 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2614 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2615 makefiles for portability to HP-UX and POSIX correctness.
2617 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2618 Also via indented variable definition in the Makefile.
2619 (Debugging by Oliver Heesakkers).
2621 PP/02 Restore caching of spamd results with expanded spamd_address.
2622 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2624 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2625 Improves build reliability. Fix from: Frank Elsner
2627 NM/02 Fix wide character breakage in the rfc2047 coding
2628 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2630 NM/03 Allow underscore in dnslist lookups
2631 Fixes bug 1026. Patch from Graeme Fowler
2633 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2634 Code patches from Adam Ciarcinski of NetBSD.
2636 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2639 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2640 is logged, to avoid truncation. Patch from John Horne.
2642 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2643 Patch from Jakob Hirsch.
2645 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2646 SQL string expansion failure details.
2647 Patch from Andrey Oktyabrski.
2649 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2650 Patch from Simon Arlott.
2652 PP/09 New lookups functionality failed to compile on old gcc which rejects
2653 extern declarations in function scope.
2654 Patch from Oliver Fleischmann
2656 PP/10 Use sig_atomic_t for flags set from signal handlers.
2657 Check getgroups() return and improve debugging.
2658 Fixed developed for diagnosis in bug 927 (which turned out to be
2661 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2662 Patch from Mark Zealey.
2664 PP/12 Bugzilla 1056: Improved spamd server selection.
2665 Patch from Mark Zealey.
2667 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2668 Based on patch from Heiko Schlittermann.
2670 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2671 Patch from Uwe Doering, sign-off by Michael Haardt.
2673 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2674 variable declaration deep within a block. Bug and patch from
2677 PP/15 lookups-Makefile IRIX compatibility coercion.
2679 PP/16 Make DISABLE_DKIM build knob functional.
2681 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2682 Patch by Simon Arlott
2684 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2685 variable argument macros. Our copy now differs from upstream.
2691 TF/01 Failure to get a lock on a hints database can have serious
2692 consequences so log it to the panic log.
2694 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2695 controlled using the smtp_confirmation log selector.
2697 TF/03 Include the error message when we fail to unlink a spool file.
2699 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2700 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2701 for maintaining out-of-tree patches for some time.
2703 PP/01 Bugzilla 139: Documentation and portability issues.
2704 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2705 Handle per-OS dynamic-module compilation flags.
2707 PP/02 Let /dev/null have normal permissions.
2708 The 4.73 fixes were a little too stringent and complained about the
2709 permissions on /dev/null. Exempt it from some checks.
2710 Reported by Andreas M. Kirchwitz.
2712 PP/03 Report version information for many libraries, including
2713 Exim version information for dynamically loaded libraries. Created
2714 version.h, now support a version extension string for distributors
2715 who patch heavily. Dynamic module ABI change.
2717 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2718 privilege escalation vulnerability whereby the Exim run-time user
2719 can cause root to append content of the attacker's choosing to
2722 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2725 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2726 If dropping privileges for untrusted macros, we disabled normal logging
2727 on the basis that it would fail; for the Exim run-time user, this is not
2728 the case, and it resulted in successful deliveries going unlogged.
2729 Fixed. Reported by Andreas Metzler.
2735 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2736 only prepend for the Resent-* case. Fixes regression introduced in
2737 Exim 4.70 by NM/22 for Bugzilla 607.
2739 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2740 increasing numbers of administrators be bitten by this.
2742 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2744 PP/03 Bugzilla 994: added openssl_options main configuration option.
2746 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2748 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2750 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2752 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2753 without a peer certificate, leading to a segfault because of an
2754 assumption that peers always have certificates. Be a little more
2755 paranoid. Problem reported by Martin Tscholak.
2757 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2758 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2759 NB: ClamAV planning to remove STREAM in "middle of 2010".
2760 CL also introduces -bmalware, various -d+acl logging additions and
2761 more caution in buffer sizes.
2763 PP/09 Implemented reverse_ip expansion operator.
2765 PP/10 Bugzilla 937: provide a "debug" ACL control.
2767 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2769 PP/12 Bugzilla 973: Implement --version.
2771 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2773 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2775 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2777 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2778 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2779 ignore trailing whitespace.
2781 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2783 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2786 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2787 Notification from Dr Andrew Aitchison.
2789 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2790 ExtendedDetectionInfo response format.
2791 Notification from John Horne.
2793 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2796 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2797 XSL and documented dependency on system catalogs, with examples of how
2800 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2803 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2804 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2805 configuration file which is writeable by the Exim user or group.
2807 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2808 of configuration files to cover files specified with the -C option if
2809 they are going to be used with root privileges, not just the default
2812 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2813 option (effectively making it always true).
2815 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2816 files to be used while preserving root privileges.
2818 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2819 that rogue child processes cannot use them.
2821 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2822 run-time user, instead of root.
2824 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2825 Exim run-time user without dropping privileges.
2827 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2828 result string, instead of calling string_vformat() twice with the same
2831 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2832 for other users. Others should always drop root privileges if they use
2833 -C on the command line, even for a whitelisted configure file.
2835 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2837 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2843 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2844 $data_path, and $header_path variables; fixed documentation bugs and
2847 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2848 exipick to access non-standard spools, including the "frozen" queue
2851 NM/01 Bugzilla 965: Support mysql stored procedures.
2852 Patch from Alain Williams
2854 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2856 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2857 Patch from Andreas Metzler
2859 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2860 Patch from Kirill Miazine
2862 NM/05 Bugzilla 671: Added umask to procmail example.
2864 JJ/03 installed exipick 20100323.0, fixing doc bug
2866 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2867 directory. Notification and patch from Dan Rosenberg.
2869 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2871 TK/02 Improve log output when DKIM signing operation fails.
2873 MH/01 Treat the transport option dkim_domain as a colon separated
2874 list, not as a single string, and sign the message with each element,
2875 omitting multiple occurences of the same signer.
2877 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2878 Bugzilla 985, 986. Patch by Simon Arlott
2880 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2881 Patch by Simon Arlott
2883 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2884 MBX locking. Notification from Dan Rosenberg.
2890 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2892 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2894 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2896 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2898 NM/04 Bugzilla 915: Flag broken perl installation during build.
2904 TK/01 Added patch by Johannes Berg that expands the main option
2905 "spamd_address" if it starts with a dollar sign.
2907 TK/02 Write list of recipients to X-Envelope-Sender header when building
2908 the mbox-format spool file for content scanning (suggested by Jakob
2911 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2912 (http://www.dcc-servers.net/) support via dccifd. Activated by
2913 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2915 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2916 by Mark Daniel Reidel <mr@df.eu>.
2918 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2919 When building exim an external PCRE library is now needed -
2920 PCRE is a system library on the majority of modern systems.
2921 See entry on PCRE_LIBS in EDITME file.
2923 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2924 conversation. Added nologin parameter to request.
2925 Patch contributed by Kirill Miazine.
2927 TF/01 Do not log submission mode rewrites if they do not change the address.
2929 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2931 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2932 log files in place. Contributed by Roberto Lima.
2934 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2936 TF/03 Bugzilla 615: When checking the local_parts router precondition
2937 after a local_part_suffix or local_part_prefix option, Exim now
2938 does not use the address's named list lookup cache, since this
2939 contains cached lookups for the whole local part.
2941 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2942 Robert Millan. Documentation is in experimental-spec.txt.
2944 TF/04 Bugzilla 668: Fix parallel build (make -j).
2946 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2948 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2949 Patch provided by Jan Srzednicki.
2951 TF/05 Leading white space used to be stripped from $spam_report which
2952 wrecked the formatting. Now it is preserved.
2954 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2955 that they are available at delivery time.
2957 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2959 TF/08 TLS error reporting now respects the incoming_interface and
2960 incoming_port log selectors.
2962 TF/09 Produce a more useful error message if an SMTP transport's hosts
2963 setting expands to an empty string.
2965 NM/06 Bugzilla 744: EXPN did not work under TLS.
2966 Patch provided by Phil Pennock.
2968 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2969 Patch provided by Richard Godbee.
2971 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2972 acl_smtp_notquit, added index entry.
2974 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2975 Patch provided by Eugene Bujak.
2977 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2978 accept(). Patch provided by Maxim Dounin.
2980 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2981 Patch provided by Phil Pennock.
2983 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2985 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2986 Patch provided by Brad "anomie" Jorsch.
2988 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2989 Patch provided by Dean Brooks.
2991 TK/05 Add native DKIM support (does not depend on external libraries).
2993 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2994 Patch provided by Graeme Fowler.
2996 NM/16 Bugzilla 851: Documentation example syntax fix.
2998 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3000 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3003 NM/19 Bugzilla 745: TLS version reporting.
3004 Patch provided by Phil Pennock.
3006 NM/20 Bugzilla 167: bool: condition support.
3007 Patch provided by Phil Pennock.
3009 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3010 clients. Patch provided by Phil Pennock.
3012 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3013 Patch provided by Brad "anomie" Jorsch.
3015 NM/23 Bugzilla 687: Fix misparses in eximstats.
3016 Patch provided by Heiko Schlittermann.
3018 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3019 Patch provided by Heiko Schlittermann.
3021 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3022 plus update to original patch.
3024 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3026 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3027 Patch provided by David Brownlee.
3029 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3031 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3033 NM/30 Bugzilla 888: TLS documentation bugfixes.
3035 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3037 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3038 Unlike the original bugzilla I have changed all shell scripts in src tree.
3040 NM/33 Bugzilla 898: Transport filter timeout fix.
3041 Patch by Todd Rinaldo.
3043 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3044 Patch by Serge Demonchaux.
3046 NM/35 Bugzilla 39: Base64 decode bug fixes.
3047 Patch by Jakob Hirsch.
3049 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3051 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3053 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3055 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3061 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3062 ALT-N's libdkim that I have put here:
3063 http://duncanthrax.net/exim-experimental/
3065 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3066 were called 'true' and it seems that C99 defines that as a reserved
3067 keyword to be used with 'bool' variable types. That means you could
3068 not include C99-style headers which use bools without triggering
3069 build errors in sieve.c.
3071 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3072 as mailq or other aliases. Changed the --help handling significantly
3073 to do whats expected. exim_usage() emits usage/help information.
3075 SC/01 Added the -bylocaldomain option to eximstats.
3077 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3079 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3081 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3087 PH/01 Another patch from the Sieve maintainer.
3089 PH/02 When an IPv6 address is converted to a string for single-key lookup
3090 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3091 dots are used instead of colons so that keys in lsearch files need not
3092 contain colons. This was done some time before quoting was made available
3093 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3094 (notated using the quote facility) so as to distinguish them from IPv4
3095 keys. This meant that lookups for IP addresses in host lists did not work
3096 for iplsearch lookups.
3098 This has been fixed by arranging for IPv6 addresses to be expressed with
3099 colons if the lookup type is iplsearch. This is not incompatible, because
3100 previously such lookups could never work.
3102 The situation is now rather anomalous, since one *can* have colons in
3103 ordinary lsearch keys. However, making the change in all cases is
3104 incompatible and would probably break a number of configurations.
3106 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3109 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3110 conversion specification without a maximum field width, thereby enabling
3111 a rogue spamd server to cause a buffer overflow. While nobody in their
3112 right mind would setup Exim to query an untrusted spamd server, an
3113 attacker that gains access to a server running spamd could potentially
3114 exploit this vulnerability to run arbitrary code as the Exim user.
3116 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3117 $primary_hostname instead of what libspf2 thinks the hosts name is.
3119 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3120 a directory entry by the name of the lookup key. Previously, if a
3121 symlink pointed to a non-existing file or a file in a directory that
3122 Exim lacked permissions to read, a lookup for a key matching that
3123 symlink would fail. Now it is enough that a matching directory entry
3124 exists, symlink or not. (Bugzilla 503.)
3126 PH/03 The body_linecount and body_zerocount variables are now exported in the
3129 PH/04 Added the $dnslist_matched variable.
3131 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3132 This means they are set thereafter only if the connection becomes
3135 PH/06 Added the client_condition to authenticators so that some can be skipped
3136 by clients under certain conditions.
3138 PH/07 The error message for a badly-placed control=no_multiline_responses left
3139 "_responses" off the end of the name.
3141 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3143 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3144 (without spaces) instead of just copying the configuration text.
3146 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3148 PH/11 Added $max_received_linelength.
3150 PH/12 Added +ignore_defer and +include_defer to host lists.
3152 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3153 way in which PCRE > 7.0 is built.
3155 PH/14 Implemented queue_only_load_latch.
3157 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3158 MAIL command. The effect was to mangle the value on 64-bit systems.
3160 PH/16 Another patch from the Sieve maintainer.
3162 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3164 PH/18 If a system quota error occurred while trying to create the file for
3165 a maildir delivery, the message "Mailbox is full" was not appended to the
3166 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3167 only to a quota excession during the actual writing of the file.
3169 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3170 characters?) which causes problems in log lines. The DN values are now
3171 passed through string_printing() before being added to log lines.
3173 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3174 and InterBase are left for another time.)
3176 PH/21 Added message_body_newlines option.
3178 PH/22 Guard against possible overflow in moan_check_errorcopy().
3180 PH/23 POSIX allows open() to be a macro; guard against that.
3182 PH/24 If the recipient of an error message contained an @ in the local part
3183 (suitably quoted, of course), incorrect values were put in $domain and
3184 $local_part during the evaluation of errors_copy.
3190 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3191 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3194 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3195 issue a MAIL command.
3197 PH/02 In an ACL statement such as
3199 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3201 if a client was not listed at all, or was listed with a value other than
3202 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3203 the condition was not true (as it should be), so access was not denied.
3204 The bug was that the ! inversion was incorrectly passed on to the second
3205 item. This has been fixed.
3207 PH/03 Added additional dnslists conditions == and =& which are different from
3208 = and & when the dns lookup returns more than one IP address.
3210 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3211 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3213 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3214 FSYNC, which compiles an option called disable_fsync that allows for
3215 bypassing fsync(). The documentation is heavily laced with warnings.
3217 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3219 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3220 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3221 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3222 including adding "make clean"; (3) Added -fPIC when compiling the test
3223 dynamically loaded module, to get rid of a warning.
3225 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3226 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3227 = 0s. The bug is otherwise harmless.
3229 PH/07 There was a bug in the dovecot authenticator such that the value of
3230 $auth1 could be overwritten, and so not correctly preserved, after a
3231 successful authentication. This usually meant that the value preserved by
3232 the server_setid option was incorrect.
3234 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3236 PH/09 Installed PCRE release 7.0.
3238 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3239 run for batched SMTP input. It is now run at the start of every message
3240 in the batch. While fixing this I discovered that the process information
3241 (output by running exiwhat) was not always getting set for -bs and -bS
3242 input. This is fixed, and it now also says "batched" for BSMTP.
3244 PH/11 Added control=no_pipelining.
3246 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3247 patch, slightly modified), and move the expansion of helo_data till after
3248 the connection is made in the smtp transport (so it can use these
3251 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3253 PH/14 Added log_selector = +pid.
3255 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3257 PH/16 Add ${if forany and ${if forall.
3259 PH/17 Added dsn_from option to vary the From: line in DSNs.
3261 PH/18 Flush SMTP output before performing a callout, unless control =
3262 no_callout_flush is set.
3264 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3265 was true (the default) a successful delivery failed to delete the retry
3266 item, thus causing premature timeout of the address. The bug is now
3269 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3271 PH/21 Long custom messages for fakedefer and fakereject are now split up
3272 into multiline responses in the same way that messages for "deny" and
3273 other ACL rejections are.
3275 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3276 with slight modification.
3278 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3279 draft, changing the syntax and factoring some duplicate code".
3281 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3282 for deliveries of the second and subsequent messages over the same SMTP
3285 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3286 ${reduce, with only minor "tidies".
3288 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3290 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3291 expansion side effects.
3293 PH/27 When a message times out after an over-quota error from an Exim-imposed
3294 quota, the bounce message says "mailbox is full". This message was not
3295 being given when it was a system quota that was exceeded. It now should
3298 MH/03 Made $recipients available in local_scan(). local_scan() already has
3299 better access to the recipient list through recipients_list[], but
3300 $recipients can be useful in postmaster-provided expansion strings.
3302 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3303 in the case of a MAIL command with additional options following the
3304 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3305 were accidentally chopped off.
3307 PH/29 SMTP synchronization checks are implemented when a command is read -
3308 there is a check that no more input is waiting when there shouldn't be
3309 any. However, for some commands, a delay in an ACL can mean that it is
3310 some time before the response is written. In this time, more input might
3311 arrive, invalidly. So now there are extra checks after an ACL has run for
3312 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3313 pipelining has not been advertised.
3315 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3317 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3318 returned in the SMTP response when smtp_return_error_details was false.
3319 This has been fixed.
3321 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3322 instead of the C I/O that was originally supplied, because problems were
3323 reported on Solaris.
3325 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3326 Exim which did not show up earlier: it was assuming that a call to
3327 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3328 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3329 was a macro that became an assignment, so it seemed to work. This has
3330 changed to a proper function call with a void return, hence the compile
3331 error. Exim's code has been fixed.
3333 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3336 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3338 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3340 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3341 because it turns out to be too big or there is a timeout) there is no
3342 "Completed" line in the log. When some messages of this type were
3343 selected by exigrep, they were listed as "not completed". Others were
3344 picked up by some special patterns. I have improved the selection
3345 criteria to be more general.
3347 PH/38 The host_find_failed option in the manualroute router can now be set
3348 to "ignore", to completely ignore a host whose IP address cannot be
3349 found. If all hosts are ignored, the behaviour is controlled by the new
3350 host_all_ignored option.
3352 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3353 homing or because of multiple MX records with /mx) generated more than
3354 one IP address, and the following item turned out to be the local host,
3355 all the secondary addresses of the first item were incorrectly removed
3356 from the list, along with the local host and any following hosts (which
3357 is what is supposed to happen).
3359 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3360 whoever called Exim into the -H file. In the case of the daemon it was
3361 behaving confusingly. When first started, it used values for whoever
3362 started the daemon, but after a SIGHUP it used the Exim user (because it
3363 calls itself on a restart). I have changed the code so that it now always
3366 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3367 message are rejected with the same error (e.g. no authentication or bad
3368 sender address), and a DATA command is nevertheless sent (as can happen
3369 with PIPELINING or a stupid MUA), the error message that was given to the
3370 RCPT commands is included in the rejection of the DATA command. This is
3371 intended to be helpful for MUAs that show only the final error to their
3374 PH/42 Another patch from the Sieve maintainer.
3376 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3377 Eximstats - Fixed some broken HTML links and added missing column headers
3379 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3380 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3382 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3384 PH/43 Yet another patch from the Sieve maintainer.
3386 PH/44 I found a way to check for a TCP/IP connection going away before sending
3387 the response to the final '.' that terminates a message, but only in the
3388 case where the client has not sent further data following the '.'
3389 (unfortunately, this is allowed). However, in many cases there won't be
3390 any further data because there won't be any more messages to send. A call
3391 to select() can be used: if it shows that the input is "ready", there is
3392 either input waiting, or the socket has been closed. An attempt to read
3393 the next input character can distinguish the two cases. Previously, Exim
3394 would have sent an OK response which the client would never have see.
3395 This could lead to message repetition. This fix should cure that, at
3396 least in a lot of common cases.
3398 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3399 advertised in response to EHLO.
3405 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3406 fixed by 4.65/MH/01 (is this a record?) are fixed:
3408 (i) An empty string was always treated as zero by the numeric comparison
3409 operators. This behaviour has been restored.
3411 (ii) It is documented that the numeric comparison operators always treat
3412 their arguments as decimal numbers. This was broken in that numbers
3413 starting with 0 were being interpreted as octal.
3415 While fixing these problems I realized that there was another issue that
3416 hadn't been noticed. Values of message_size_limit (both the global option
3417 and the transport option) were treated as octal if they started with 0.
3418 The documentation was vague. These values are now always treated as
3419 decimal, and I will make that clear in the documentation.
3425 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3426 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3429 MH/01 Don't check that the operands of numeric comparison operators are
3430 integers when their expansion is in "skipping" mode (fixes bug
3431 introduced by 4.64-PH/07).
3433 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3434 child addresses, Exim now panics and dies. Previously, because the count
3435 is held in a short int, deliveries were likely to be lost. As such a
3436 large number of recipients for a single message is ridiculous
3437 (performance will be very, very poor), I have chosen to impose a limit
3438 rather than extend the field.
3444 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3445 leftover -K file (the existence of which was triggered by #402).
3446 While we were at it, introduced process PID as part of the -K
3447 filename. This should rule out race conditions when creating
3450 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3451 processing considerably. Previous code took too long for large mails,
3452 triggering a timeout which in turn triggers #401.
3454 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3455 in the DK code in transports.c. sendfile() is not really portable,
3456 hence the _LINUX specificness.
3458 TF/01 In the add_headers option to the mail command in an Exim filter,
3459 there was a bug that Exim would claim a syntax error in any
3460 header after the first one which had an odd number of characters
3463 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3464 callout verification, Exim cached a "reject" for the entire domain. This
3465 is correct for most verifications, but it is not correct for a recipient
3466 verification with use_sender or use_postmaster set, because in that case
3467 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3468 case of MAIL FROM:<> rejection from other early rejections (e.g.
3469 rejection of HELO). When verifying a recipient using a non-null MAIL
3470 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3471 Whatever the result of the callout, the value of the domain cache is
3472 left unchanged (for any other kind of callout, getting as far as trying
3473 RCPT means that the domain itself is ok).
3475 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3478 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3479 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3480 session, the daemon ignores ECONNECT errors and logs others; it now
3481 ignores EPIPE as well.
3483 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3484 (quoted-printable decoding).
3486 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3487 later the small subsequent patch to fix an introduced bug.
3489 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3491 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3493 PH/08 An error is now given if message_size_limit is specified negative.
3495 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3496 to be given (somewhat) arbitrary names.
3498 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3501 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3502 miscellaneous code fixes
3504 PH/10 Added the log_reject_target ACL modifier to specify where to log
3507 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3508 hostname. This is wrong, because it relates to the incoming message (and
3509 probably the interface on which it is arriving) and not to the outgoing
3510 callout (which could be using a different interface). This has been
3511 changed to use the value of the helo_data option from the smtp transport
3512 instead - this is what is used when a message is actually being sent. If
3513 there is no remote transport (possible with a router that sets up host
3514 addresses), $smtp_active_hostname is used.
3516 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3517 tweaks were necessary in order to get it to work (see also 21 below):
3518 (a) The code assumed that strncpy() returns a negative number on buffer
3519 overflow, which isn't the case. Replaced with Exim's string_format()
3521 (b) There were several signed/unsigned issues. I just did the minimum
3522 hacking in of casts. There is scope for a larger refactoring.
3523 (c) The code used strcasecmp() which is not a standard C function.
3524 Replaced with Exim's strcmpic() function.
3525 (d) The code set only $1; it now sets $auth1 as well.
3526 (e) A simple test gave the error "authentication client didn't specify
3527 service in request". It would seem that Dovecot has changed its
3528 interface. Fortunately there's a specification; I followed it and
3529 changed what the client sends and it appears to be working now.
3531 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3534 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3535 address A is aliased to B and C, where B exists and C does not. Without
3536 -v the output is "A verified" because verification stops after a
3537 successful redirection if more than one address is generated. However,
3538 with -v the child addresses are also verified. Exim was outputting "A
3539 failed to verify" and then showing the successful verification for C,
3540 with its parentage. It now outputs "B failed to verify", showing B's
3541 parentage before showing the successful verification of C.
3543 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3544 look up a TXT record in a specific list after matching in a combined
3547 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3548 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3549 they consult the DNS. I had assumed they would set it the way they
3550 wanted; and indeed my experiments on Linux seem to show that in some
3551 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3552 To be on the safe side, however, I have now made the interface to
3553 host_find_byname() similar to host_find_bydns(), with an argument
3554 containing the DNS resolver options. The host_find_byname() function now
3555 sets these options at its start, just as host_find_bydns() does. The smtp
3556 transport options dns_qualify_single and dns_search_parents are passed to
3557 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3558 of host_find_byname() use the default settings of RES_DEFNAMES
3559 (qualify_single) but not RES_DNSRCH (search_parents).
3561 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3562 spool_read_header() do less string testing, by means of a preliminary
3563 switch on the second character of optional "-foo" lines. (This is
3564 overdue, caused by the large number of possibilities that now exist.
3565 Originally there were few.) While I was there, I also converted the
3566 str(n)cmp tests so they don't re-test the leading "-" and the first
3567 character, in the hope this might squeeze out yet more improvement.
3569 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3570 flag allowing group syntax was set by the header_syntax check but not
3571 turned off, possible causing trouble later; (2) The flag was not being
3572 set at all for the header_verify test, causing "group"-style headers to
3573 be rejected. I have now set it in this case, and also caused header_
3574 verify to ignore an empty address taken from a group. While doing this, I
3575 came across some other cases where the code for allowing group syntax
3576 while scanning a header line wasn't quite right (mostly, not resetting
3577 the flag correctly in the right place). These bugs could have caused
3578 trouble for malformed header lines. I hope it is now all correct.
3580 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3581 with the "reply" argument non-NULL. The code, however (which originally
3582 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3583 but it didn't always do it. This confused somebody who was copying the
3584 code for some other use. I have removed all the tests.
3586 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3587 feature that was used to support insecure browsers during the U.S. crypto
3588 embargo. It requires special client support, and Exim is probably the
3589 only MTA that supported it -- and would never use it because real RSA is
3590 always available. This code has been removed, because it had the bad
3591 effect of slowing Exim down by computing (never used) parameters for the
3592 RSA_EXPORT functionality.
3594 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3595 authenticator to fail if there's a tab character in the incoming data
3596 (there should never be unless someone is messing about, as it's supposed
3597 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3598 if the connection is using TLS or if the remote IP is the same as the
3599 local IP, and the "valid-client-cert option" if a client certificate has
3602 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3603 authenticators. This can be used for authorization after authentication
3604 succeeds. (In the case of plaintext, it servers for both authentication
3607 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3608 if any retry times were supplied.
3610 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3611 connection, where there is no client IP address to check. In this
3612 situation, the verify now always succeeds.
3614 PH/25 Applied John Jetmore's -Mset patch.
3616 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3618 PH/27 In a string expansion for a processed (not raw) header when multiple
3619 headers of the same name were present, leading whitespace was being
3620 removed from all of them, but trailing whitespace was being removed only
3621 from the last one. Now trailing whitespace is removed from each header
3622 before concatenation. Completely empty headers in a concatenation (as
3623 before) are ignored.
3625 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3626 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3628 PH/29 [Removed. This was a change that I later backed out, and forgot to
3629 correct the ChangeLog entry (that I had efficiently created) before
3630 committing the later change.]
3632 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3633 address errors (4xx response to RCPT) over the same connection as other
3634 messages routed to the same hosts. Such deliveries are always "forced",
3635 so retry times are not inspected. This resulted in far too many retries
3636 for the affected addresses. The effect occurred only when there were more
3637 hosts than the hosts_max_try setting in the smtp transport when it had
3638 the 4xx errors. Those hosts that it had tried were not added to the list
3639 of hosts for which the message was waiting, so if all were tried, there
3640 was no problem. Two fixes have been applied:
3642 (i) If there are any address or message errors in an SMTP delivery, none
3643 of the hosts (tried or untried) are now added to the list of hosts
3644 for which the message is waiting, so the message should not be a
3645 candidate for sending over the same connection that was used for a
3646 successful delivery of some other message. This seems entirely
3647 reasonable: after all the message is NOT "waiting for some host".
3648 This is so "obvious" that I'm not sure why it wasn't done
3649 previously. Hope I haven't missed anything, but it can't do any
3650 harm, as the worst effect is to miss an optimization.
3652 (ii) If, despite (i), such a delivery is accidentally attempted, the
3653 routing retry time is respected, so at least it doesn't keep
3654 hammering the server.
3656 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3657 in ${readsocket because some servers need this prod.
3659 PH/32 Added some extra debug output when updating a wait-xxx database.
3661 PH/33 The hint "could be header name not terminated by colon", which has been
3662 given for certain expansion errors for a long time, was not being given
3663 for the ${if def:h_colon_omitted{... case.
3665 PH/34 The spec says: "With one important exception, whenever a domain list is
3666 being scanned, $domain contains the subject domain." There was at least
3667 one case where this was not true.
3669 PH/35 The error "getsockname() failed: connection reset by peer" was being
3670 written to the panic log as well as the main log, but it isn't really
3671 panic-worthy as it just means the connection died rather early on. I have
3672 removed the panic log writing for the ECONNRESET error when getsockname()
3675 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3676 runs only) independently of the message's sender address. This meant
3677 that, if the 4xx error was in fact related to the sender, a different
3678 message to the same recipient with a different sender could confuse
3679 things. In particular, this can happen when sending to a greylisting
3680 server, but other circumstances could also provoke similar problems.
3681 I have changed the default so that the retry time for these errors is now
3682 based a combination of the sender and recipient addresses. This change
3683 can be overridden by setting address_retry_include_sender=false in the
3686 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3687 remote server are returned as part of bounce messages. This was not
3688 happening for LMTP over a pipe (the lmtp transport), but now it is the
3689 same for both kinds of LMTP.
3691 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3692 in header lines that were in fact CNAMEs. This is no longer the case.
3694 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3695 and queue runs started by the daemon processed all messages. This has
3696 been fixed so that -R and -S can now usefully be given with -q<time>.
3698 PH/40 Import PCRE release 6.7 (fixes some bugs).
3700 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3702 PH/42 Give an error if -q is specified more than once.
3704 PH/43 Renamed the variables $interface_address and $interface_port as
3705 $received_ip_address and $received_port, to make it clear that these
3706 values apply to message reception, and not to the outgoing interface when
3707 a message is delivered. (The old names remain recognized, of course.)
3709 PH/44 There was no timeout on the connect() call when using a Unix domain
3710 socket in the ${readsocket expansion. There now is.
3712 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3713 be meaningful with "accept".
3715 SC/01 Eximstats V1.43
3716 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3718 SC/02 Eximstats V1.44
3719 Use a glob alias rather than an array ref in the generated
3720 parser. This improves both readability and performance.
3722 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3723 Collect SpamAssassin and rejection statistics.
3724 Don't display local sender or destination tables unless
3725 there is data to show.
3726 Added average volumes into the top table text output.
3728 SC/04 Eximstats V1.46
3729 Collect data on the number of addresses (recipients)
3730 as well as the number of messages.
3732 SC/05 Eximstats V1.47
3733 Added 'Message too big' to the list of mail rejection
3734 reasons (thanks to Marco Gaiarin).
3736 SC/06 Eximstats V1.48
3737 Mainlog lines which have GMT offsets and are too short to
3738 have a flag are now skipped.
3740 SC/07 Eximstats V1.49 (Alain Williams)
3741 Added the -emptyok flag.
3743 SC/08 Eximstats V1.50
3744 Fixes for obtaining the IP address from reject messages.
3746 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3747 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3748 whitespace changes from 4.64-PH/27
3750 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3753 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3754 are found, allow negative numbers in numeric criteria)
3756 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3758 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3759 to match changes made in 4.64-PH/43
3761 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3763 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3764 "domain" is actually an IP address, and force a failure. This locks out
3765 those revolvers/nameservers that support "A-for-A" lookups, in
3766 contravention of the specifications.
3768 PH/48 When a host name was looked up from an IP address, and the subsequent
3769 forward lookup of the name timed out, the host name was left in
3770 $sender_host_name, contrary to the specification.
3772 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3773 restricted to single-key lookups, Exim was not diagnosing an error if
3774 * or *@ was used with a query-style lookup.
3776 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3778 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3779 long ago, but noone interested enough thought of it. Let's just say that
3780 the "1.1" means that there are some new functions that weren't there at
3781 some point in the past.
3783 PH/51 Error processing for expansion failure of helo_data from an smtp
3784 transport during callout processing was broken.
3786 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3787 tested/used via the -bh/-bhc/-bs options.
3789 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3790 bug, fixed in subsequent PCRE releases).
3792 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3793 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3795 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3801 SC/01 Use a glob alias rather than an array ref in eximstats generated
3802 parser. This improves both readability and performance.
3804 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3805 Don't display local sender or destination tables in eximstats unless
3806 there is data to show.
3807 Added average volumes into the eximstats top table text output.
3809 SC/03 Collect data on the number of addresses (recipients) as well
3810 as the number of messages in eximstats.
3812 TF/01 Correct an error in the documentation for the redirect router. Exim
3813 does (usually) call initgroups() when daemonizing.
3815 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3816 with consistent privilege compared to when running as a daemon.
3818 TF/03 Note in the spec that $authenticated_id is not set for local
3819 submissions from trusted users.
3821 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3822 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3824 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3825 by adding some example configuration directives to the default
3826 configuration file. A little bit of work is required to uncomment the
3827 directives and define how usernames and passwords are checked, but
3828 there is now a framework to start from.
3830 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3831 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3832 without this. I don't know how relevant this is to other LDAP libraries.
3834 PH/02 Add the verb name to the "unknown ACL verb" error.
3836 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3838 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3840 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3841 directory not expanded when it should be if an expanded home directory
3842 was set for the address (which is overridden by the transport).
3844 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3847 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3848 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3849 because it is too late at that time, and has no effect.
3851 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3852 security issue with \' (bugzilla #107). I could not use the
3853 PQescapeStringConn() function, because it needs a PGconn value as one of
3856 PH/08 When testing addresses using -bt, indicate those final addresses that
3857 are duplicates that would not cause an additional delivery. At least one
3858 person was confused, thinking that -bt output corresponded to deliveries.
3859 (Suppressing duplicates isn't a good idea as you lose the information
3860 about possibly different redirections that led to the duplicates.)
3862 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3863 systems where poll() doesn't work, in particular OS X.
3865 PH/10 Added more information to debugging output for retry time not reached.
3867 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3868 operations in malware.c.
3870 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3873 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3874 syslog_duplication set false, log lines that would normally be written
3875 both the the main log and to the reject log were not written to syslog at
3878 PH/14 In the default configuration, change the use of "message" in ACL warn
3879 statements to "add_header".
3881 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3882 not followed by a command (e.g. "seen endif").
3884 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3885 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3888 PH/17 Added extra conditions to the default value of delay_warning_condition
3892 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3893 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3894 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3897 The Auto-Submitted: and various List- headers are standardised, whereas I
3898 don't think Precedence: ever was.
3900 PH/18 Refactored debugging code in route_finduser() to show more information,
3901 in particular, the error code if getpwnam() issues one.
3903 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3904 This is apparently needed in addition to the PH/07 change above to avoid
3905 any possible encoding problems.
3907 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3908 but not after initializing Perl.
3910 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3911 output them only if debugging. By default they are written stderr,
3912 apparently, which is not desirable.
3914 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3917 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3920 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3922 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3923 authenticated or an ident call has been made. Suppress the default
3924 values for $authenticated_id and $authenticated_sender (but permit -oMai
3925 and -oMas) when testing with -bh.
3927 PH/24 Re-jigged the order of the tests in the default configuration so that the
3928 tests for valid domains and recipients precede the DNS black list and CSA
3929 tests, on the grounds that those ones are more expensive.
3931 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3932 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3933 This bug exists in every version of Exim that I still have, right back to
3936 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3937 However, an attempt to turn on case-sensitivity in a regex key by
3938 including (?-i) didn't work because the subject string was already
3939 lowercased, and the effects were non-intuitive. It turns out that a
3940 one-line patch can be used to allow (?-i) to work as expected.
3946 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3947 other effects) broke the use of negated acl sub-conditions.
3949 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3952 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3953 "Deny" causes Exim to reject the incoming connection with a 554 error.
3954 Unfortunately, if there is a major crisis, such as a disk failure,
3955 tcp-wrappers gives "deny", whereas what one would like would be some
3956 kind of temporary error. A kludge has been added to help with this.
3957 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3958 554 error is used if errno is still zero or contains ENOENT (which occurs
3959 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3962 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3964 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3965 errors. Otherwise a message that provokes a temporary error (when other
3966 messages do not) can cause a whole host to time out.
3968 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3969 addresses were routed directly to files or pipes from a redirect router.
3970 File deliveries just didn't batch; pipe deliveries might have suffered
3973 PH/06 A failure to get a lock for a hints database would erroneously always say
3974 "Failed to get write lock", even when it was really a read lock.
3976 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3977 of 0600. This has been changed to use the value of the lockfile_mode
3978 option (which defaults to 0600).
3980 PH/08 Applied small patch from the Sieve maintainer.
3982 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3983 folder from quota calculations, a direct delivery into this folder messed
3984 up the contents of the maildirsize file. This was because the regex was
3985 used only to exclude .Trash (or whatever) when the size of the mailbox
3986 was calculated. There was no check that a delivery was happening into an
3987 excluded directory. This bug has been fixed by ignoring all quota
3988 processing for deliveries into excluded directories.
3990 PH/10 Added the maildirfolder_create_regex option to appendfile.
3996 PH/01 The code for finding all the local interface addresses on a FreeBSD
3997 system running IPv6 was broken. This may well have applied to all BSD
3998 systems, as well as to others that have similar system calls. The broken
3999 code found IPv4 interfaces correctly, but gave incorrect values for the
4000 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4001 that it would not match correctly against @[] and not recognize the IPv6
4004 PH/02 The ipliteral router was not recognizing addresses of the form user@
4005 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4007 PH/03 Added disable_ipv6.
4009 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4010 decoded form, because it is most often used to construct To: headers
4011 lines in autoreplies, and the decoded form may well be syntactically
4012 invalid. However, $reply_address has leading white space removed, and all
4013 newlines turned into spaces so that the autoreply transport does not
4016 PH/05 If group was specified without a user on a router, and no group or user
4017 was specified on a transport, the group from the router was ignored.
4019 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4020 for visible compile-time settings that can be used to change these
4021 numbers, for those that want even more. Backwards compatibility with old
4022 spool files has been maintained. However, going back to a previous Exim
4023 release will lost any variables that are in spool files.
4025 PH/07 Two small changes when running in the test harness: increase delay when
4026 passing a TCP/IP connection to a new process, in case the original
4027 process has to generate a bounce, and remove special handling of
4028 127.0.0.2 (sic), which is no longer necessary.
4030 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4031 be the same on different OS.
4033 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4036 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4037 whether --show-vars was specified or not
4039 JJ/02 exipick: Added support for new ACL variable spool format introduced
4042 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4043 syntactically invalid From: or Reply-to: line, and a filter used this to
4044 generate an autoreply, and therefore failed to obtain an address for the
4045 autoreply, Exim could try to deliver to a non-existent relative file
4046 name, causing unrelated and misleading errors. What now happens is that
4047 it logs this as a hard delivery error, but does not attempt to create a
4050 PH/11 The exinext utility has a -C option for testing purposes, but although
4051 the given file was scanned by exinext itself; it wasn't being passed on
4052 when Exim was called.
4054 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4055 an end-of-file indication when reading a command response.
4057 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4058 compiled. In many other places in Exim, IPv6 addresses are always
4059 recognized, so I have changed this. It also means that IPv4 domain
4060 literals of the form [IPV4:n.n.n.n] are now always recognized.
4062 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4063 used if the router is not running as root, for example, when verifying at
4064 ACL time, or when using -bh. The debugging output from this situation was
4065 non-existent - all you got was a failure to exec. I have made two
4068 (a) Failures to set uid/gid, the current directory, or a process leader
4069 in a subprocess such as that created by queryprogram now generate
4070 suitable debugging output when -d is set.
4072 (b) The queryprogram router detects when it is not running as root,
4073 outputs suitable debugging information if -d is set, and then runs
4074 the subprocess without attempting to change uid/gid.
4076 PH/15 Minor change to Makefile for building test_host (undocumented testing
4079 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4080 additional section of a DNS packet that returns MX or SRV records.
4081 Instead, it always explicitly searches for A/AAAA records. This avoids
4082 major problems that occur when a DNS server includes only records of one
4083 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4084 fixed another bug: if SRV records were looked up and the corresponding
4085 address records were *not* found in the additional section, the port
4086 values from the SRV records were lost.
4088 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4089 using the correct key (the original address) when searching the retry
4090 rules in order to find which one to use for generating the retry hint.
4092 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4093 adding the default one. Similarly, if it contains a Reply-To: header, the
4094 errors_reply_to option, if set, is not used.
4096 PH/19 When calculating a retry time, Exim used to measure the "time since
4097 failure" by looking at the "first failed" field in the retry record. Now
4098 it does not use this if it is later than than the arrival time of the
4099 message. Instead it uses the arrival time. This makes for better
4100 behaviour in cases where some deliveries succeed, thus re-setting the
4101 "first failed" field. An example is a quota failure for a huge message
4102 when small messages continue to be delivered. Without this change, the
4103 "time since failure" will always be short, possible causing more frequent
4104 delivery attempts for the huge message than are intended.
4105 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4107 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4108 $1, $2, $3) because the numerical variables can be reset during some
4109 expansion items (e.g. "match"), thereby losing the authentication data.
4111 PH/21 Make -bV show the size of off_t variables so that the test suite can
4112 decide whether to run tests for quotas > 2G.
4114 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4115 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4116 filecount value is greater than 2G or if a quota value is greater than 2G
4117 on a system where the size of off_t is not greater than 4, a panic error
4120 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4121 never match. The debug and -bh output now contains an explicit error
4122 message indicating a malformed IPv4 address or mask.
4124 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4125 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4126 PH/23 above applies.
4128 PH/25 Do not write to syslog when running in the test harness. The only
4129 occasion when this arises is a failure to open the main or panic logs
4130 (for which there is an explicit test).
4132 PH/26 Added the /no_tell option to "control=freeze".
4134 PH/27 If a host name lookup failed very early in a connection, for example, if
4135 the IP address matched host_lookup and the reverse lookup yielded a name
4136 that did not have a forward lookup, an error message of the form "no IP
4137 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4138 could be logged. Now it outputs the IP address instead of "NULL".
4140 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4141 allows the sender and the authenticated sender to be set when
4142 submitting a message from within Exim. Since child_open_exim() is
4143 documented for local_scan(), the new function should be too.
4145 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4146 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4147 results in an empty string is now treated as unset.
4149 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4151 PH/31 Added sender_verify_fail logging option.
4153 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4154 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4155 tidied the source and removed it altogether.
4157 PH/33 When a queue run was abandoned because the load average was too high, a
4158 log line was always written; now it is written only if the queue_run log
4159 selector is set. In addition, the log line for abandonment now contains
4160 information about the queue run such as the pid. This is always present
4161 in "start" and "stop" lines but was omitted from the "abandon" line.
4163 PH/34 Omit spaces between a header name and the colon in the error message that
4164 is given when verify = headers_syntax fails (if there are lots of them,
4165 the message gets confusing).
4167 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4168 names, as there are now some PTR records that contain slashes. This check
4169 is only to protect against broken name servers that fall over on strange
4170 characters, so the fact that it applies to all lookups doesn't matter.
4172 PH/36 Now that the new test suite is complete, we can remove some of the
4173 special code in Exim that was needed for the old test suite. For example,
4174 sorting DNS records because real resolvers return them in an arbitrary
4175 order. The new test suite's fake resolver always returns records in the
4178 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4179 bounces) except when queue_only is set, to avoid logging races between
4180 the different processes.
4182 PH/38 Panic-die if .include specifies a non-absolute path.
4184 PH/39 A tweak to the "H" retry rule from its user.
4186 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4187 a label. They prevented compilation on older perls.
4189 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4190 a warning to be raised on newish perls.
4192 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4193 on queue. Changes to match documented behaviour of showing count of
4194 messages matching specified criteria.
4196 PH/40 Changed the default ident timeout from 30s to 5s.
4198 PH/41 Added support for the use of login_cap features, on those BSD systems
4199 that have them, for controlling the resources used by pipe deliveries.
4201 PH/42 The content-scanning code uses fopen() to create files in which to put
4202 message data. Previously it was not paying any attention to the mode of
4203 the files. Exim runs with umask(0) because the rest of the code creates
4204 files with open(), and sets the required mode explicitly. Thus, these
4205 files were ending up world-writeable. This was not a big issue, because,
4206 being within the spool directory, they were not world-accessible. I have
4207 created a function called modefopen, which takes an additional mode
4208 argument. It sets umask(777), creates the file, chmods it to the required
4209 mode, then resets the umask. All the relevant calls to fopen() in the
4210 content scanning code have been changed to use this function.
4212 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4213 to 24 hours. This avoids potential overflow problems when processing G
4214 and H retry rules. I suspect nobody ever tinkers with this value.
4216 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4218 PH/45 When the plaintext authenticator is running as a client, the server's
4219 challenges are checked to ensure they are valid base64 strings. By
4220 default, the authentication attempt is cancelled if an invalid string is
4221 received. Setting client_ignore_invalid_base64 true ignores these errors.
4222 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4223 they are received. Thus, the responses can be made to depend on the
4224 challenges. If an invalid string is ignored, an empty string is placed in
4227 PH/46 Messages that are created by the autoreply transport now contains a
4228 References: header, in accordance with RFCs 2822 and 3834.
4230 PH/47 Added authenticated_sender_force to the smtp transport.
4232 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4234 PH/49 Installed latest patch from the Sieve maintainer.
4236 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4237 was also set, the appendfile transport was unnecessarily scanning a
4238 directory of message files (e.g. for maildir delivery) to find the count
4239 of files (along with the size), even though it did not need this
4240 information. It now does the scan only if it needs to find either the
4241 size of the count of files.
4243 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4245 PH/52 Two bugs concerned with error handling when the smtp transport is
4248 (i) Exim was not creating retry information for temporary errors given
4249 for individual recipients after the DATA command when the smtp transport
4250 was used in LMTP mode. This meant that they could be retried too
4251 frequently, and not timed out correctly.
4253 (ii) Exim was setting the flag that allows error details to be returned
4254 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4255 recipients that were returned after the DATA command.
4257 PH/53 This is related to PH/52, but is more general: for any failing address,
4258 when detailed error information was permitted to be returned to the
4259 sender, but the error was temporary, then after the final timeout, only
4260 "retry timeout exceeded" was returned. Now it returns the full error as
4261 well as "retry timeout exceeded".
4263 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4264 do this, and (what is worse) MTAs that accept it.
4266 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4267 will now be deprecated.
4269 PH/56 New os.c-cygwin from the Cygwin maintainer.
4271 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4272 formats (previously only available in exim formats via -bpr, -bpru,
4273 and -bpra. Now also available in native and exiqgrep formats)
4275 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4276 with very large, slow to parse queues
4278 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4280 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4282 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4283 responses to authentication challenges, though it was showing the
4284 challenges; (ii) I've removed the CR characters from the debug output for
4287 PH/58 Allow for the insertion of a newline as well as a space when a string
4288 is turned into more than one encoded-word during RFC 2047 encoding. The
4289 Sieve code now uses this.
4291 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4292 data_4xx, lost_connection, tls_required.
4294 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4295 message was being sent as an SMTP response.
4297 PH/61 Add -l and -k options to exicyclog.
4299 PH/62 When verifying, if an address was redirected to one new address, so that
4300 verification continued, and the new address failed or deferred after
4301 having set something in $address_data, the value of $address_data was not
4302 passed back to the ACL. This was different to the case when no
4303 redirection occurred. The value is now passed back in both cases.
4305 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4306 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4307 use login_cap.h, so on its own it isn't the distinguishing feature. The
4308 new name refers directly to the setclassresources() function.
4310 PH/65 Added configuration files for NetBSD3.
4312 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4314 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4315 is preferred over IPv4.
4317 PH/68 The bounce_return_message and bounce_return_body options were not being
4318 honoured for bounces generated during the reception of non-SMTP messages.
4319 In particular, this applied to messages rejected by the ACL. This bug has
4320 been fixed. However, if bounce_return_message is true and bounce_return_
4321 body is false, the headers that are returned for a non-SMTP message
4322 include only those that have been read before the error was detected.
4323 (In the case of an ACL rejection, they have all been read.)
4325 PH/69 The HTML version of the specification is now built in a directory called
4326 spec_html instead of spec.html, because the latter looks like a path with
4327 a MIME-type, and this confuses some software.
4329 PH/70 Catch two compiler warnings in sieve.c.
4331 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4332 function verify_get_ident() calls ip_connect() to connect a socket, but
4333 if the "connect()" function timed out, ip_connect() used to close the
4334 socket. However, verify_get_ident() also closes the socket later, and in
4335 between Exim writes to the log, which may get opened at this point. When
4336 the socket was closed in ip_connect(), the log could get the same file
4337 descriptor number as the socket. This naturally causes chaos. The fix is
4338 not to close the socket in ip_connect(); the socket should be closed by
4339 the function that creates it. There was only one place in the code where
4340 this was missing, in the iplookup router, which I don't think anybody now
4341 uses, but I've fixed it anyway.
4343 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4344 well as to direct DNS lookups. Otherwise the handling of names in host
4345 lists is inconsistent and therefore confusing.
4351 PH/01 Two changes to the default runtime configuration:
4353 (1) Move the checks for relay_from_hosts and authenticated clients from
4354 after to before the (commented out) DNS black list checks.
4356 (2) Add control=submission to the relay_from_hosts and authenticated
4357 clients checks, on the grounds that messages accepted by these
4358 statements are most likely to be submissions.
4360 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4362 (1) Generate an error if the third argument for the ${prvs expansion is
4365 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4368 (3) Reset the variables that are obtained from the first argument of
4369 ${prvscheck and used in the second argument before leaving the code,
4370 because their memory is reclaimed, so using them afterwards may do
4373 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4374 one (it's much easier than Tom thought :-).
4376 (5) Because of (4), we can now allow for the use of $prvscheck_result
4377 inside the third argument.
4379 PH/03 For some reason, the default setting of PATH when running a command from
4380 a pipe transport was just "/usr/bin". I have changed it to
4383 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4384 anything to be listed in the output from -bV.
4386 PH/05 When a filter generated an autoreply, the entire To: header line was
4387 quoted in the delivery log line, like this:
4389 => >A.N.Other <ano@some.domain> <original@ddress> ...
4391 This has been changed so that it extracts the operative address. There
4392 may be more than one such address. If so, they are comma-separated, like
4395 => >ano@some.domain,ona@other.domain <original@ddress> ...
4397 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4398 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4399 not being looked up in the rDNS to get a host name, Exim was showing the
4400 IP address twice in Received: lines, even though the IP addresses were
4401 identical. For example:
4403 Received: from [1.2.3.4] (helo=[1.2.3.4])
4405 However, if the real host name was known, it was omitting the HELO data
4406 if it matched the actual IP address. This has been tidied up so that it
4407 doesn't show the same IP address twice.
4409 PH/07 When both +timestamp and +memory debugging was on, the value given by
4410 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4411 called by the debug printing, thereby overwriting the timestamp buffer.
4412 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4414 PH/08 When the original message was included in an autoreply transport, it
4415 always said "this is a copy of the message, including all the headers",
4416 even if body_only or headers_only was set. It now gives an appropriate
4419 PH/09 Applied a patch from the Sieve maintainer which:
4421 o fixes some comments
4422 o adds the (disabled) notify extension core
4423 o adds some debug output for the result of if/elsif tests
4424 o points to the current vacation draft in the documentation
4425 and documents the missing references header update
4429 o fixes a bug in processing the envelope test (when testing
4430 multiple envelope elements, the last element determined the
4433 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4434 Electronic Mail") by including:
4436 Auto-submitted: auto-generated
4438 in the messages that it generates (bounce messages and others, such as
4439 warnings). In the case of bounce messages for non-SMTP messages, there was
4440 also a typo: it was using "Auto_submitted" (underscore instead of
4441 hyphen). Since every message generated by Exim is necessarily in response
4442 to another message, thes have all been changed to:
4444 Auto-Submitted: auto-replied
4446 in accordance with these statements in the RFC:
4448 The auto-replied keyword:
4450 - SHOULD be used on messages sent in direct response to another
4451 message by an automatic process,
4453 - MUST NOT be used on manually-generated messages,
4455 - MAY be used on Delivery Status Notifications (DSNs) and Message
4456 Disposition Notifications (MDNs),
4458 - MUST NOT be used on messages generated by automatic or periodic
4459 processes, except for messages which are automatic responses to
4462 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4463 to the default Received: header definition.
4465 PH/12 Added log selector acl_warn_skipped (default on).
4467 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4468 variables because (a) they are in the wrong storage pool and (b) even if
4469 they were copied, it wouldn't work properly because of the caching.
4471 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4472 checking when decoding. Apparently there are clients that generate
4473 overlong encoded strings. Why am I not surprised?
4475 PH/15 If the first argument of "${if match_address" was not empty, but did not
4476 contain an "@" character, Exim crashed. Now it writes a panic log message
4477 and treats the condition as false.
4479 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4481 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4482 extension "envelope-auth". The code is finished and in agreement with
4483 other implementations, but there is no documentation so far and in fact,
4484 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4485 not changing the active code.
4487 Print executed "if" and "elsif" statements when debugging is used. This
4488 helps a great deal to understand what a filter does.
4490 Document more things not specified clearly in RFC3028. I had all this
4491 sorted out, when out of a sudden new issues came to my mind. Oops."
4493 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4496 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4497 canonical form (as documented). However, after a host name lookup from
4498 the IP address, check_host() was doing a simple string comparison with
4499 addresses acquired from the DNS when checking that the found name did
4500 have the original IP as one of its addresses. Since any found IPv6
4501 addresses are likely to be in abbreviated form, the comparison could
4502 fail. Luckily, there already exists a function for doing the comparison
4503 by converting both addresses to binary, so now that is used instead of
4504 the text comparison.
4506 PH/20 There was another similar case to PH/19, when a complete host name was
4507 given in a host list; looking up its IP address could give an abbreviated
4508 form, whereas the current host's name might or might not be abbreviated.
4509 The same fix has been applied.
4515 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4516 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4519 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4520 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4522 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4524 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4525 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4526 Also, for "Auto-Submitted", treat anything other than "no" as
4527 non-personal, in accordance with RFC 3834. (Previously it treated
4528 anything starting "auto-" as non-personal.)
4530 TF/01 The control=submission/name=... option had a problem with syntax
4531 errors if the name included a slash character. The /name= option
4532 now slurps the rest of the string, so it can include any characters
4533 but it must come last in the list of options (after /sender_retain
4536 PH/05 Some modifications to the interface to the fake nameserver for the new
4544 TK/01 Added the "success_on_redirect" address verification option. See
4545 NewStuff for rationale and an example.
4547 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4549 PH/02 Patch to exigrep to allow it to work on syslog lines.
4551 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4552 fread() to skip over the body file's header line, because in Cygwin the
4553 header line is locked and is inaccessible.
4555 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4556 co-exist for some time) to make it clear that it is the Exim ID that is
4557 referenced, not the Message-ID: header line.
4559 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4560 string_format() function, because snprintf() does not exist on all
4563 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4564 ${stat: expansion item.
4566 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4567 protocol synchronization error", to keep the pedants happy.
4569 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4570 well as for IRIX systems, when gcc is being used. See the host.c source
4573 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4575 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4578 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4579 transport and to the smtp transport in LMTP mode.
4581 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4583 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4584 run a filter in a subprocess. This could lead to confusion in subsequent
4585 lookups in the parent process. There should also be a search_tidyup() at
4586 the end of the subprocess.
4588 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4589 only if the host matched helo_try_verify_hosts, which caused the
4590 verification to occur when the EHLO/HELO command was issued. The ACL just
4591 tested the remembered result. Now, if a previous verification attempt has
4592 not happened, "verify = helo" does it there and then.
4594 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4596 TK/03 Fix log output including CR from clamd.
4598 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4599 exist provoked a memory error which could cause a segfault.
4601 PH/15 Installed PCRE 6.2
4603 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4605 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4606 of the problem. Specifically, suggested +O2 rather than +O1 for the
4609 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4611 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4612 record, the port was not correctly logged when the outgoing_port log
4613 selector was set (it logged the transort's default port).
4615 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4616 fallback_hosts, and "hosts" in the smtp transport.
4618 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4619 host errors such as "Connection refused".
4621 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4622 authentication with radiusclient 0.4.9:
4624 - Error returned from rc_read_config was caught wrongly
4625 - Username/password not passed on to radius server due to wrong length.
4627 The presumption is that some radiusclient API changes for 4.51/PH/17
4628 were not taken care of correctly. The code is still untested by me (my
4629 Linux distribution still has 0.3.2 of radiusclient), but it was
4630 contributed by a Radius user.
4632 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4633 expanding the "port" option of the smtp transport.
4635 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4636 while reading a MIME header. Thanks to Tom Hughes for a patch.
4638 PH/24 Include config.h inside local_scan.h so that configuration settings are
4641 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4642 that in an ACL for RCPT (for example), you can examine exactly what was
4645 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4646 commands, but it was not correctly comparing the address with the actual
4647 client host address. Thus, it would show the EHLO address in Received:
4648 header lines when this was not necessary.
4650 PH/27 Added the % operator to ${eval:}.
4652 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4653 it should be ignoring failures (because with -C, for example, it has lost
4654 privilege). It wasn't ignoring creation failures other than "already
4657 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4660 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4661 because an input line was too long, either on its own, or by virtue of
4662 too many continuations, the temporary file was not being removed, and the
4663 return code was incorrect.
4665 PH/31 Missing "BOOL" in function definition in filtertest.c.
4667 PH/32 Applied Sieve patches from the maintainer.
4669 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4671 PH/33 Added "verify = not_blind".
4673 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4674 Local/Makefile (with some defaults set). These are used in built scripts
4675 such as exicyclog, but they have never been used in the exim_install
4676 script (though there are many overriding facilities there). I have
4677 arranged that the exim_install script now takes note of these two
4680 PH/35 Installed configuration files for Dragonfly.
4682 PH/36 When a locally submitted message by a trusted user did not contain a
4683 From: header, and the sender address was obtained from -f or from an SMTP
4684 MAIL command, and the trusted user did not use -F to supply a sender
4685 name, $originator_name was incorrectly used when constructing a From:
4686 header. Furthermore, $originator_name was used for submission mode
4687 messages from external hosts without From: headers in a similar way,
4688 which is clearly wrong.
4690 PH/37 Added control=suppress_local_fixups.
4692 PH/38 When log_selector = +received_sender was set, and the addition of the
4693 sender made the log line's construction buffer exactly full, or one byte
4694 less than full, an overflow happened when the terminating "\n" was
4697 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4698 when the result of a list match is failure because a DNS lookup failed.
4700 PH/40 RM_COMMAND is now used in the building process.
4702 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4703 the "build-* directories that it finds.
4705 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4706 address in a domain literal was a prefix of an interface address.
4708 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4709 when verifying a sender address, unless rewrite_headers is false.
4711 PH/44 Wrote a long comment about why errors_to addresses are verified as
4712 recipients, not senders.
4714 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4715 the ratelimit ACL was added.
4717 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4719 PH/46 Added extra information about PostgreSQL errors to the error string.
4721 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4722 avoiding the need to install special zones in a real server. This is
4723 backwards compatible; if it can't find the fake resolver, it drops back.
4724 Thus, both old and new test suites can be run.
4726 TF/02 Added util/ratelimit.pl
4728 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4729 clock is set back in time.
4731 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4732 Candler <B.Candler@pobox.com>.
4734 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4735 OK for addresses that are the result of redirections.
4737 PH/48 A number of further additions for the benefit of the new test suite,
4738 including a fake gethostbyname() that interfaces to the fake DNS resolver
4741 TF/06 The fix for widen_domains has also been applied to qualify_single and
4742 search_parents which are the other dnslookup options that can cause
4745 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4748 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4750 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4751 service" if it encountered an MX record with an empty target hostname.
4752 The message is now "an MX or SRV record indicated no SMTP service".
4754 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4755 if the DNS of the sending site is misconfigured. This is quite a
4756 common situation. This change restores the behaviour of treating a
4757 helo verification defer as a failure.
4759 PH/51 If self=fail was set on a router, the bounce message did not include the
4760 actual error message.
4766 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4768 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4769 command itself ended in error, the underlying message about the transport
4770 filter timeout was being overwritten with the pipe command error. Now the
4771 underlying error message should be appended to the second error message.
4773 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4775 PH/02 Reduce the amount of output that "make" produces by default. Full output
4776 can still be requested.
4778 PH/03 The warning log line about a condition test deferring for a "warn" verb
4779 was being output only once per connection, rather than after each
4780 occurrence (because it was using the same function as for successful
4781 "warn" verbs). This seems wrong, so I have changed it.
4783 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4784 it should not have, which might have caused a crash in the right
4785 circumstances, but probably never did.
4787 PH/04 Installed a modified version of Tony Finch's patch to make submission
4788 mode fix the return path as well as the Sender: header line, and to
4789 add a /name= option so that you can make the user's friendly name appear
4792 TF/03 Added the control = fakedefer ACL modifier.
4794 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4795 Mark Lowes for thorough testing.
4797 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4799 TK/03 Merged latest SRS patch from Miles Wilton.
4801 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4802 with the definition in sysexits.h (which is #included earlier).
4803 Fortunately, Exim does not actually use EX_OK. The code used to try to
4804 preserve the sysexits.h value, by assuming that macro definitions were
4805 scanned for macro replacements. I have been disabused of this notion,
4806 so now the code just undefines EX_OK before #including unistd.h.
4808 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4809 in the smtp transport. When a block could not be written in a single
4810 write() function, the timeout was being re-applied to each part-write.
4811 This seems wrong - if the receiver was accepting one byte at a time it
4812 would take for ever. The timeout is now adjusted when this happens. It
4813 doesn't have to be particularly precise.
4815 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4816 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4818 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4819 without a domain if the check to <postmaster@domain> fails.
4821 SC/01 Eximstats: added -xls and the ability to specify output files
4822 (patch written by Frank Heydlauf).
4824 SC/02 Eximstats: use FileHandles for outputting results.
4826 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4828 SC/04 Eximstats: fixed display of large numbers with -nvr option
4830 SC/05 Eximstats: fixed merging of reports with empty tables.
4832 SC/06 Eximstats: added the -include_original_destination flag
4834 SC/07 Eximstats: removed tabs and trailing whitespace.
4836 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4838 TK/06 MBOX spool code: Add real "From " MBOX separator line
4839 so the .eml file is really in mbox format (even though
4840 most programs do not really care). Patch from Alex Miller.
4842 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4843 The latter is generated from $received_to and is only set if the
4844 message has one envelope recipient. SA can use these headers,
4845 obviously out-of-the-box. Patch from Alex Miller.
4847 PH/08 The ${def test on a variable was returning false if the variable's
4848 value was "0", contrary to what the specification has always said!
4849 The result should be true unless the variable is empty.
4851 PH/09 The syntax error of a character other than { following "${if
4852 def:variable_name" (after optional whitespace) was not being diagnosed.
4853 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4854 accidental colon was present, for example, could give incorrect results.
4856 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4857 result is used (not including appendfile, where other changes are about
4860 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4861 This involved changing a lot of size variables from int to off_t. It
4862 should work with maildirs and everything.
4864 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4865 spamd dying while we are connected to it.
4867 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4870 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4871 function for BDB 4.3.
4873 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4875 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4876 the sources for PCRE have been re-arranged and more files are now
4879 PH/15 The code I had for printing potentially long long variables in PH/11
4880 above was not the best (it lost precision). The length of off_t variables
4881 is now inspected at build time, and an appropriate printing format (%ld
4882 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4883 to be "long long int" or "long int". This is needed for the internal
4884 formatting function string_vformat().
4886 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4887 the configuration file to be ":syslog", then the script "guesses" where
4888 the logs files are, rather than using the compiled in default. In our
4889 case the guess is not the same as the compiled default, so the script
4890 suddenly stopped working when I started to use syslog. The patch checks
4891 to see if log_file_path is "". If so, it attempts to read it from exim
4892 with no configuration file to get the compiled in version, before it
4893 falls back to the previous guessing code."
4895 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4896 implementing BATV in an Exim configuration. See NewStuff for the gory
4899 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4900 Makefile that are specific to HP-UX.
4902 PH/18 If the "use_postmaster" option was set for a recipient callout together
4903 with the "random" option, the postmaster address was used as the MAIL
4904 FROM address for the random test, but not for the subsequent recipient
4905 test. It is now used for both.
4907 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4908 patch removes a few documentation additions to RFC 3028, because the
4909 latest draft now contains them. It adds the new en;ascii-case comparator
4910 and a new error check for 8bit text in MIME parts. Comparator and
4911 require names are now matched exactly. I enabled the subaddress
4912 extension, but it is not well tested yet (read: it works for me)."
4914 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4915 rework some of the code of TK/09 above to avoid the hardwired use of
4916 "%lld" and "long long". Replaced the call to snprintf() with a call to
4919 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4920 records point to non-existent hosts", "retry timeout exceeded", and
4921 "retry time not reached for any host after a long failure period".
4923 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4924 experimental DomainKeys support:
4926 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4927 (2) On an error such as an illegally used "control", the wrong name for
4928 the control was given.
4930 These problems did NOT occur unless DomainKeys support was compiled.
4932 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4934 PH/24 Added ${if match_ip condition.
4936 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4937 databases so that it will be absolutely obvious if a crash occurs in the
4938 DB library. This is a regular occurrence (often caused by mis-matched
4941 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4942 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4943 picked up on a user's system that detects such things. There doesn't seem
4944 to be a gcc warning option for this - only an attribute that has to be
4945 put on the function's prototype. It seems that in Fedora Core 4 they have
4946 set this on a number of new functions. No doubt there will be more in due
4949 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4950 specify a transport. However, if an address that was verified by such a
4951 router was the subject of a callout, Exim crashed because it tried to
4952 read the rcpt_include_affixes from the non-existent transport. Now it
4953 just assumes that the setting of that option is false. This bug was
4954 introduced by 4.51/PH/31.
4956 PH/28 Changed -d+all to exclude +memory, because that information is very
4957 rarely of interest, but it makes the output a lot bigger. People tend to
4958 do -d+all out of habit.
4960 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4961 code in os-type was giving problems when libc.so lives in lib64, like on
4964 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4965 aren't the modern standard, and it seems that some systems' include files
4966 don't always have them. Exim was already checking for some of the newer
4967 ones like T_AAAA, and defining it itself. I've added checks for all the
4968 record types that Exim uses.
4970 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4971 not automatically generating a new one, as it is supposed to. This
4972 prevented TLS from working. If the file did exist, but contained invalid
4973 data, a new version was generated, as expected. It was only the case of a
4974 non-existent file that was broken.
4976 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4977 with a change in libdomainkeys > 0.64.
4979 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4980 from DNS. If the selector record carries the flag, it now has
4981 precedence over the domain-wide flag.
4983 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4985 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4986 the use of a port name that isn't defined in /etc/services) occurred, the
4987 message was deferred as in a normal delivery, and thus remained on the
4988 spool, instead of being failed because of the mua_wrapper setting. This
4989 is now fixed, and I tidied up some of the mua_wrapper messages at the
4992 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4993 the messages in a hash of arrays rather than using individual hashes.
4994 This is a bit cleaner and results in dramatic memory savings, albeit
4995 at a slight CPU cost.
4997 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4998 as requested by Marc Sherman.
5000 SC/10 Eximstats: added histograms for user specified patterns as requested
5003 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5005 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5006 fopen() in the content-scanning modules that did not already have it.
5012 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5013 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5015 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5017 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5019 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5020 to test Sieve filters that use "vacation".
5022 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5023 that changes the way the GnuTLS parameters are stored in the cache file.
5024 The new format can be generated externally. For backward compatibility,
5025 if the data in the cache doesn't make sense, Exim assumes it has read an
5026 old-format file, and it generates new data and writes a new file. This
5027 means that you can't go back to an older release without removing the
5030 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5031 work if there are any delivery delays because "one_time" forces the
5032 parent to be marked "delivered", so its unseen clone is never tried
5033 again. For this reason, Exim now forbids the simultaneous setting of
5036 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5037 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5038 entry if you want to know the details. The fix, however, neglected to
5039 consider the case when local delivery batching is involved. The test for
5040 "previously delivered" was not happening when checking to see if an
5041 address could be batched with a previous (undelivered) one; under
5042 certain circumstances this could lead to multiple deliveries to the same
5045 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5046 in its include files, and this causes problems building Exim.
5048 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5049 header_syntax) but Exim was just ignoring anything given after a slash.
5050 In particular, this caused confusion with an attempt to use "verify =
5051 reverse_host_lookup/defer_ok". An error is now given when options are
5052 supplied for verify items that do not have them. (Maybe reverse_host_
5053 lookup should have a defer_ok option, but that's a different point.)
5055 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5056 defined by RFC 821) to 2048, because there were problems with some AUTH
5057 commands, and RFC 1869 says the size should be increased for extended
5058 SMTP commands that take arguments.
5060 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5063 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5064 "unknown" error; now it says that the functionality isn't in the binary.
5066 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5067 an address' error message when a string expansion fails (syntax or
5068 whatever). Otherwise the password may appear in the log. Following change
5069 PH/42 below, there is no longer a chance of it appearing in a bounce
5072 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5074 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5075 of its addresses was ever tried. (Bugzilla bug #2.)
5077 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5078 the result incorrectly in the debug output. (It correctly added a newline
5079 to what was transported.)
5081 TF/01 Added $received_time.
5083 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5084 commented out examples of how to interface to a virus scanner and to
5085 SpamAssassin. Also added commented examples of av_scanner and
5086 spamd_address settings.
5088 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5089 and controls are allowed in which ACLs. There were a couple of minor
5090 errors. Some of the entries in the conditions table (which is a table of
5091 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5092 negation of where the condition IS allowed.
5094 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5096 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5097 header file does not have a version number, so I've had to invent a new
5098 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5099 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5100 radiusclient), but it was contributed by a Radius user.
5102 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5103 files or directories, for OpenSSL.
5105 PH/19 When an Exim process that is running as root has to create an Exim log
5106 file, it does so in a subprocess that runs as exim:exim so as to get the
5107 ownership right at creation (otherwise, other Exim processes might see
5108 the file with the wrong ownership). There was no test for failure of this
5109 fork() call, which would lead to the process getting stuck as it waited
5110 for a non-existent subprocess. Forks do occasionally fail when resources
5111 run out. I reviewed all the other calls to fork(); they all seem to check
5114 PH/20 When checking for unexpected SMTP input at connect time (before writing
5115 the banner), Exim was not dealing correctly with a non-positive return
5116 from the read() function. If the client had disconnected by this time,
5117 the result was a log entry for a synchronization error with an empty
5118 string after "input=" when read() returned zero. If read() returned -1
5119 (an event I could not check), uninitialized data bytes were printed.
5120 There were reports of junk text (parts of files, etc) appearing after
5123 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5125 PH/22 Added support for macro redefinition, and (re)definition in between
5126 driver and ACL definitions.
5128 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5129 forgetting to use the resulting value; it was using the unexpanded value.
5131 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5132 hadn't been configured. The fix is from Juergen Kreileder, who
5133 understands it better than I do:
5135 "Here's what I see happening with three configured cyrus_sasl
5136 authenticators configured (plain, login, cram-md5):
5138 On startup auth_cyrus_sasl_init() gets called for each of these.
5139 This means three calls to sasl_listmech() without a specified mech_list.
5140 => SASL tests which mechs of all available mechs actually work
5141 => three warnings about OTP not working
5142 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5144 With the patch, sasl_listmech() also gets called three times. But now
5145 SASL's mech_list option is set to the server_mech specified in the the
5146 authenticator. Or in other words, the answer from sasl_listmech()
5147 gets limited to just the mech you're testing for (which is different
5149 => the return list contains just 'plain' or 'login', 'cram-md5' or
5150 nothing depending on the value of ob->server_mech.
5152 I've just tested the patch: Authentication still works fine,
5153 unavailable mechs specified in the exim configuration are still
5154 caught, and the auth.log warnings about OTP are gone."
5156 PH/25 When debugging is enabled, the contents of the command line are added
5157 to the debugging output, even when log_selector=+arguments is not
5160 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5161 answer is "GNU", and only if the return is "GNU/something" is the answer
5164 PH/27 $acl_verify_message is now set immediately after the failure of a
5165 verification in an ACL, and so is available in subsequent modifiers. In
5166 particular, the message can be preserved by coding like this:
5168 warn !verify = sender
5169 set acl_m0 = $acl_verify_message
5171 Previously, $acl_verify_message was set only while expanding "message"
5172 and "log_message" when a very denied access.
5174 PH/28 Modified OS/os.c-Linux with
5176 -#ifndef OS_LOAD_AVERAGE
5177 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5179 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5180 nomenclature these days.)
5182 PH/29 Installed patch from the Sieve maintainer that adds the options
5183 sieve_useraddress and sieve_subaddress to the redirect router.
5185 PH/30 In these circumstances:
5186 . Two addresses routed to the same list of hosts;
5187 . First host does not offer TLS;
5188 . First host accepts first address;
5189 . First host gives temporary error to second address;
5190 . Second host offers TLS and a TLS session is established;
5191 . Second host accepts second address.
5192 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5193 and peerdn, if requested) that were in fact used only for the second
5196 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5197 attention to any local part prefix or suffix that was matched by the
5198 router that accepted the address. It now behaves in the same way as it
5199 does for delivery: the affixes are removed from the local part unless
5200 rcpt_include_affixes is set on the transport.
5202 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5203 timeout during the DATA phase of an incoming message.
5205 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5206 applied a patch sanctioned by the Sieve maintainer.
5208 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5209 the uid or gid is negative. A case of a negative gid caused this to be
5210 noticed. The fix allows for either to be negative.
5212 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5213 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5216 PH/36 The change PH/12 above was broken. Fixed it.
5218 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5219 the grounds that routing the same address twice would always produce the
5220 same answer. This might have been true once, but it is certainly no
5221 longer true now. Routing a child address may depend on the previous
5222 routing that produced that child. Some complicated redirection strategies
5223 went wrong when messages had multiple recipients, and made Exim's
5224 behaviour dependent on the order in which the addresses were given.
5226 I have moved the duplicate checking until after the routing is complete.
5227 Exim scans the addresses that are assigned to local and remote
5228 transports, and removes any duplicates. This means that more work will be
5229 done, as duplicates will always all be routed, but duplicates are
5230 presumably rare, so I don't expect this is of any significance.
5232 For deliveries to pipes, files, and autoreplies, the duplicate checking
5233 still happens during the routing process, since they are not going to be
5236 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5237 It corrects a timeout issue with spamd. This is Ian's comment: "The
5238 background is that sometimes spamd either never reads data from a
5239 connection it has accepted, or it never writes response data. The exiscan
5240 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5241 blindly assumes that writes won't block so it may never time out."
5243 PH/39 Allow G after quota size as well as K and M.
5245 PH/40 The value set for $authenticated_id in an authenticator may not contain
5246 binary zeroes or newlines because the value is written to log lines and
5247 to spool files. There was no check on this. Now the value is run through
5248 the string_printing() function so that such characters are converted to
5249 printable escape sequences.
5251 PH/41 $message_linecount is a new variable that contains the total number of
5252 lines in the message. Compare $body_linecount, which is the count for the
5255 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5256 bounce and delay warning messages, except in certain special cases, which
5259 (a) An SMTP error message from a remote host;
5260 (b) A message specified in a :fail: redirection;
5261 (c) A message specified in a "fail" command in a system filter;
5262 (d) A message specified in a FAIL return from the queryprogram router;
5263 (e) A message specified by the cannot_route_message router option.
5265 In these cases only, Exim does include the error details in bounce and
5266 warning messages. There are also a few cases where bland messages such
5267 as "unrouteable address" or "local delivery error" are given.
5269 PH/43 $value is now also set for the "else" part of a ${run expansion.
5271 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5272 being worked on, but at least Exim now implements the latest version to
5275 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5276 process to complete was treated as a delivery failure, a timeout while
5277 writing the message to the pipe was logged, but erroneously treated as a
5278 successful delivery. Such timeouts include transport filter timeouts. For
5279 consistency with the overall process timeout, these timeouts are now
5280 treated as errors, giving rise to delivery failures by default. However,
5281 there is now a new Boolean option for the pipe transport called
5282 timeout_defer, which, if set TRUE, converts the failures into defers for
5283 both kinds of timeout. A transport filter timeout is now identified in
5286 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5287 systems where "make" and "gmake" are different, calling "gmake" at top
5288 level broke things. I've arranged for the value of $(MAKE) to be passed
5289 from the Makefile to this script so that it can call the same version of
5293 A note about Exim versions 4.44 and 4.50
5294 ----------------------------------------
5296 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5297 changes of various kinds. As a consequence, a big documentation update was
5298 needed. This delayed the release for rather longer than seemed good, especially
5299 in the light of a couple of (minor) security issues. Therefore, the changes
5300 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5301 release. So 4.44 and 4.50 are in effect two different branches that both start
5304 I have left the 4.50 change log unchanged; it contains all the changes since
5305 4.43. The change log for 4.44 is below; many of its items are identical to
5306 those for 4.50. This seems to be the most sensible way to preserve the
5307 historical information.
5313 1. Minor wording change to the doc/README.SIEVE file.
5315 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5316 computation of the current number of files was incorrect.
5318 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5319 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5322 4. Give more explanation in the error message when the command for a transport
5323 filter fails to execute.
5325 5. There are several places where Exim runs a non-Exim command in a
5326 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5327 was being done only for the command run by the queryprogram router. It is
5328 now done for all such subprocesses. The other cases are: ${run, transport
5329 filters, and the commands run by the lmtp and pipe transports.
5331 6. Added CONFIGURE_GROUP build-time option.
5333 7. Some older OS have a limit of 256 on the maximum number of file
5334 descriptors. Exim was using setrlimit() to set 1000 as a large value
5335 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5336 systems. I've change it so that if it can't get 1000, it tries for 256.
5338 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5339 was an oversight, and furthermore, ever since the addition of extra
5340 controls (e.g. 4.43/32), the checks on when to allow different forms of
5341 "control" were broken. There should now be diagnostics for all cases when a
5342 control that does not make sense is encountered.
5344 9. Added the /retain_sender option to "control=submission".
5346 10. $recipients is now available in the predata ACL (oversight).
5348 11. Tidy the search cache before the fork to do a delivery from a message
5349 received from the command line. Otherwise the child will trigger a lookup
5350 failure and thereby defer the delivery if it tries to use (for example) a
5351 cached ldap connection that the parent has called unbind on.
5353 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5354 of $address_data from the recipient verification was clobbered by the
5355 sender verification.
5357 13. The value of address_data from a sender verification is now available in
5358 $sender_address_data in subsequent conditions in the ACL statement.
5360 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5362 15. Added a new option "connect=<time>" to callout options, to set a different
5365 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5366 was its contents. (It was OK if the option was not defined at all.)
5368 17. A "Completed" log line is now written for messages that are removed from
5369 the spool by the -Mrm option.
5371 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5372 information about exactly what failed.
5374 19. Added -dd to debug only the daemon process.
5376 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5377 handles timeouts, both on the server side and network timeouts. Renamed the
5378 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5380 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5381 It is now set to "smtps".
5383 22. $host_address is now set to the target address during the checking of
5384 ignore_target_hosts.
5386 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5387 being passed; this would have caused $sender_host_name to have been used if
5388 matching the list had actually called for a host name (not very likely,
5389 since this list is usually IP addresses). A host name is now passed as
5392 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5393 code that specifies a non-restarting handler (typically sigaction() in
5394 modern systems) in an attempt to fix a rare and obscure crash bug.
5396 25. Narrowed the window for a race in the daemon that could cause it to ignore
5397 SIGCHLD signals. This is not a major problem, because they are used only to
5398 wake it up if nothing else does.
5400 26. A malformed maildirsize file could cause Exim to calculate negative values
5401 for the mailbox size or file count. Odd effects could occur as a result.
5402 The maildirsize information is now recalculated if the size or filecount
5405 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5406 support for a long time. Removed HAVE_SYS_VFS_H.
5408 28. Installed the latest version of exipick from John Jetmore.
5410 29. In an address list, if the pattern was not a regular expression, an empty
5411 subject address (from a bounce message) matched only if the pattern was an
5412 empty string. Non-empty patterns were not even tested. This was the wrong
5413 because it is perfectly reasonable to use an empty address as part of a
5414 database query. An empty address is now tested by patterns that are
5415 lookups. However, all the other forms of pattern expect the subject to
5416 contain a local part and a domain, and therefore, for them, an empty
5417 address still always fails if the pattern is not itself empty.
5419 30. Exim went into a mad DNS loop when attempting to do a callout where the
5420 host was specified on an smtp transport, and looking it up yielded more
5421 than one IP address.
5423 31. Re-factored the code for checking spool and log partition space into a
5424 function that finds that data and another that does the check. The former
5425 is then used to implement four new variables: $spool_space, $log_space,
5426 $spool_inodes, and $log_inodes.
5428 32. The RFC2047 encoding function was originally intended for short strings
5429 such as real names; it was not keeping to the 75-character limit for
5430 encoded words that the RFC imposes. It now respects the limit, and
5431 generates multiple encoded words if necessary. To be on the safe side, I
5432 have increased the buffer size for the ${rfc2047: expansion operator from
5435 33. It is now permitted to omit both strings after an "if" condition; if the
5436 condition is true, the result is "true". As before, when the second string
5437 is omitted, a false condition yields an empty string. This makes it less
5438 cumbersome to write custom ACL and router conditions.
5440 34. Failure to deliver a bounce message always caused it to be frozen, even if
5441 there was an errors_to setting on the router. The errors_to setting is now
5444 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5445 canonical form (fully expanded) before being placed in
5446 $sender_host_address.
5448 36. The table in the code that translates DNS record types into text (T_A to
5449 "A" for instance) was missing entries for NS and CNAME. It is just possible
5450 that this could have caused confusion if both these types were looked up
5451 for the same domain, because the text type is used as part of Exim's
5452 per-process caching. But the chance of anyone hitting this buglet seems
5455 37. The dnsdb lookup has been extended in a number of ways.
5457 (1) There is a new type, "zns", which walks up the domain tree until it
5458 finds some nameserver records. It should be used with care.
5460 (2) There is a new type, "mxh", which is like "mx" except that it returns
5461 just the host names, not the priorities.
5463 (3) It is now possible to give a list of domains (or IP addresses) to be
5464 looked up. The behaviour when one of the lookups defers can be
5465 controlled by a keyword.
5467 (4) It is now possible to specify the separator character for use when
5468 multiple records are returned.
5470 38. The dnslists ACL condition has been extended: it is now possible to supply
5471 a list of IP addresses and/or domains to be looked up in a particular DNS
5474 39. Added log_selector=+queue_time_overall.
5476 40. When running the queue in the test harness, wait just a tad after forking a
5477 delivery process, to get repeatability of debugging output.
5479 41. Include certificate and key file names in error message when GnuTLS fails
5480 to set them up, because the GnuTLS error message doesn't include the name
5481 of the failing file when there is a problem reading it.
5483 42. Allow both -bf and -bF in the same test run.
5485 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5487 44. The "Exiscan patch" is now merged into the mainline Exim source.
5489 45. Sometimes the final signoff response after QUIT could fail to get
5490 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5491 < 0 before doing a fflush(). This bug looks as though it goes back to the
5492 introduction of TLS in release 3.20, but "sometimes" must have been rare
5493 because the tests only now provoked it.
5495 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5496 (this can affect the format of dates).
5498 47. exim_tidydb, when checking for the continued existence of a message for
5499 which it has found a message-specific retry record, was not finding
5500 messages that were in split spool directories. Consequently, it was
5501 deleting retry records that should have stayed in existence.
5503 48. Steve fixed some bugs in eximstats.
5505 49. The SPA authentication driver was not abandoning authentication and moving
5506 on to the next authenticator when an expansion was forced to fail,
5507 contradicting the general specification for all authenticators. Instead it
5508 was generating a temporary error. It now behaves as specified.
5510 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5511 (the order specifies the preference for clients). The order is now AES256,
5512 AES128, 3DES, ARCFOUR128.
5514 51. Small patch to Sieve code - explicitly set From: when generating an
5517 52. Exim crashed if a remote delivery caused a very long error message to be
5518 recorded - for instance if somebody sent an entire SpamAssassin report back
5519 as a large number of 550 error lines. This bug was coincidentally fixed by
5520 increasing the size of one of Exim's internal buffers (big_buffer) that
5521 happened as part of the Exiscan merge. However, to be on the safe side, I
5522 have made the code more robust (and fixed the comments that describe what
5525 53. Now that there can be additional text after "Completed" in log lines (if
5526 the queue_time_overall log selector is set), a one-byte patch to exigrep
5527 was needed to allow it to recognize "Completed" as not the last thing in
5530 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5531 patch that reportedly fixes this has been added. I am not expert enough to
5532 create a test for it. This is what the patch creator wrote:
5534 "I found a little strange behaviour of ldap code when working with
5535 Windows 2003 AD Domain, where users was placed in more than one
5536 Organization Units. When I tried to give exim partial DN, the exit code
5537 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5538 But simultaneously result of request was absolutely normal ldap result,
5539 so I produce this patch..."
5541 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5542 REFERENCE, so I have modified the code to exclude the patch when that macro
5545 55. Some experimental protocols are using DNS PTR records for new purposes. The
5546 keys for these records are domain names, not reversed IP addresses. The
5547 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5548 leaves it alone. Component reversal etc. now happens only for IP addresses.
5551 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5553 57. Double the size of the debug message buffer (to 2048) so that more of very
5554 long debug lines gets shown.
5556 58. The exicyclog utility now does better if the number of log files to keep
5557 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5559 59. Two changes related to the smtp_active_hostname option:
5561 (1) $smtp_active_hostname is now available as a variable.
5562 (2) The default for smtp_banner uses $smtp_active_hostname instead
5563 of $primary_hostname.
5565 60. The host_aton() function is supposed to be passed a string that is known
5566 to be a valid IP address. However, in the case of IPv6 addresses, it was
5567 not checking this. This is a hostage to fortune. Exim now panics and dies
5568 if the condition is not met. A case was found where this could be provoked
5569 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5570 components; fortuitously, this particular loophole had already been fixed
5571 by change 4.50/55 above.
5573 If there are any other similar loopholes, the new check in host_aton()
5574 itself should stop them being exploited. The report I received stated that
5575 data on the command line could provoke the exploit when Exim was running as
5576 exim, but did not say which command line option was involved. All I could
5577 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5578 running as the user.
5581 61. There was a buffer overflow vulnerability in the SPA authentication code
5582 (which came originally from the Samba project). I have added a test to the
5583 spa_base64_to_bits() function which I hope fixes it.
5586 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5587 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5589 63. The daemon start-up calls getloadavg() while still root for those OS that
5590 need the first call to be done as root, but it missed one case: when
5591 deliver_queue_load_max is set with deliver_drop_privilege. This is
5592 necessary for the benefit of the queue runner, because there is no re-exec
5593 when deliver_drop_privilege is set.
5595 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5596 This has been fixed.
5598 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5599 was in use, was not putting the data itself into the right store pool;
5600 consequently, it could be overwritten for a subsequent message in the same
5601 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5604 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5606 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5607 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5608 the function were treating the return as a boolean value, which happened to
5609 work because 0=false and not-0=true, but is not correct code.
5611 68. The host_aton() function was not handling scoped IPv6 addresses (those
5612 with, for example, "%eth0" on the end) correctly.
5614 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5615 negated items (that is, ~something) in unsigned ints. Some compilers
5616 apparently mutter when there is no cast.
5618 70. If an address verification called from an ACL failed, and did not produce a
5619 user-specific message (i.e. there was only a "system" message), nothing was
5620 put in $acl_verify_message. In this situation, it now puts the system
5623 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5624 session; change 4.31/43 added the unwanted input to the log line - except
5625 that it did not do this in the start of session case. It now does.
5627 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5628 This is wrong and can cause the other end to generate a synchronization
5629 error if it is another Exim or anything else that does the synchronization
5630 check. A QUIT command is no longer sent after a timeout.
5632 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5633 during host lookups.
5635 74. The defer_ok option of callout verification was not working if it was used
5636 when verifying addresses in header lines, that is, for this case:
5638 verify = header_sender/callout=defer_ok
5640 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5641 those file descriptors could be used for SMTP connections. If anything
5642 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5643 could be sent to the SMTP client, causing chaos. The daemon now opens
5644 stdin, stdout, and stderr to /dev/null when it puts itself into the
5647 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5648 log by default. The user can override this with suitable Perl magic.
5650 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5651 the log message when discard triggers, was not working for the DATA ACL or
5652 for the non-SMTP ACL.
5654 78. Error message wording change in sieve.c.
5656 79. If smtp_accept_max_per_host was set, the number of connections could be
5657 restricted to fewer than expected, because the daemon was trying to set up
5658 a new connection before checking whether the processes handling previous
5659 connections had finished. The check for completed processes is now done
5660 earlier. On busy systems, this bug wouldn't be noticed because something
5661 else would have woken the daemon, and it would have reaped the completed
5664 80. If a message was submitted locally by a user whose login name contained one
5665 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5666 It caused a spool format error. I have fixed the spool reading code. A
5667 related problem was that the "from" clause in the Received: line became
5668 illegal because of the space(s). It is now covered by ${quote_local_part.
5670 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5673 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5675 83. Patch from Sieve maintainer to fix unterminated string problem in
5676 "vacation" handling.
5678 84. Some minor changes to the Linux configuration files to help with other
5679 OS variants using glibc.
5681 85. One more patch for Sieve to update vacation handling to latest spec.
5684 ----------------------------------------------------
5685 See the note above about the 4.44 and 4.50 releases.
5686 ----------------------------------------------------
5692 1. Change 4.43/35 introduced a bug that caused file counts to be
5693 incorrectly computed when quota_filecount was set in an appendfile
5696 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5697 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5700 3. Give more explanation in the error message when the command for a transport
5701 filter fails to execute.
5703 4. There are several places where Exim runs a non-Exim command in a
5704 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5705 was being done only for the command run by the queryprogram router. It is
5706 now done for all such subprocesses. The other cases are: ${run, transport
5707 filters, and the commands run by the lmtp and pipe transports.
5709 5. Some older OS have a limit of 256 on the maximum number of file
5710 descriptors. Exim was using setrlimit() to set 1000 as a large value
5711 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5712 systems. I've change it so that if it can't get 1000, it tries for 256.
5714 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5715 was an oversight, and furthermore, ever since the addition of extra
5716 controls (e.g. 4.43/32), the checks on when to allow different forms of
5717 "control" were broken. There should now be diagnostics for all cases when a
5718 control that does not make sense is encountered.
5720 7. $recipients is now available in the predata ACL (oversight).
5722 8. Tidy the search cache before the fork to do a delivery from a message
5723 received from the command line. Otherwise the child will trigger a lookup
5724 failure and thereby defer the delivery if it tries to use (for example) a
5725 cached ldap connection that the parent has called unbind on.
5727 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5728 of $address_data from the recipient verification was clobbered by the
5729 sender verification.
5731 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5732 was its contents. (It was OK if the option was not defined at all.)
5734 11. A "Completed" log line is now written for messages that are removed from
5735 the spool by the -Mrm option.
5737 12. $host_address is now set to the target address during the checking of
5738 ignore_target_hosts.
5740 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5741 being passed; this would have caused $sender_host_name to have been used if
5742 matching the list had actually called for a host name (not very likely,
5743 since this list is usually IP addresses). A host name is now passed as
5746 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5747 code that specifies a non-restarting handler (typically sigaction() in
5748 modern systems) in an attempt to fix a rare and obscure crash bug.
5750 15. Narrowed the window for a race in the daemon that could cause it to ignore
5751 SIGCHLD signals. This is not a major problem, because they are used only to
5752 wake it up if nothing else does.
5754 16. A malformed maildirsize file could cause Exim to calculate negative values
5755 for the mailbox size or file count. Odd effects could occur as a result.
5756 The maildirsize information is now recalculated if the size or filecount
5759 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5760 support for a long time. Removed HAVE_SYS_VFS_H.
5762 18. Updated exipick to current release from John Jetmore.
5764 19. Allow an empty sender to be matched against a lookup in an address list.
5765 Previously the only cases considered were a regular expression, or an
5768 20. Exim went into a mad DNS lookup loop when doing a callout where the
5769 host was specified on the transport, if the DNS lookup yielded more than
5772 21. The RFC2047 encoding function was originally intended for short strings
5773 such as real names; it was not keeping to the 75-character limit for
5774 encoded words that the RFC imposes. It now respects the limit, and
5775 generates multiple encoded words if necessary. To be on the safe side, I
5776 have increased the buffer size for the ${rfc2047: expansion operator from
5779 22. Failure to deliver a bounce message always caused it to be frozen, even if
5780 there was an errors_to setting on the router. The errors_to setting is now
5783 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5784 canonical form (fully expanded) before being placed in
5785 $sender_host_address.
5787 24. Updated eximstats to version 1.33
5789 25. Include certificate and key file names in error message when GnuTLS fails
5790 to set them up, because the GnuTLS error message doesn't include the name
5791 of the failing file when there is a problem reading it.
5793 26. Expand error message when OpenSSL has problems setting up cert/key files.
5796 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5797 (this can affect the format of dates).
5799 28. exim_tidydb, when checking for the continued existence of a message for
5800 which it has found a message-specific retry record, was not finding
5801 messages that were in split spool directories. Consequently, it was
5802 deleting retry records that should have stayed in existence.
5804 29. eximstats updated to version 1.35
5805 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5806 1.35 - bugfix such that pie charts by volume are generated correctly
5808 30. The SPA authentication driver was not abandoning authentication and moving
5809 on to the next authenticator when an expansion was forced to fail,
5810 contradicting the general specification for all authenticators. Instead it
5811 was generating a temporary error. It now behaves as specified.
5813 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5814 (the order specifies the preference for clients). The order is now AES256,
5815 AES128, 3DES, ARCFOUR128.
5817 31. Small patch to Sieve code - explicitly set From: when generating an
5820 32. Exim crashed if a remote delivery caused a very long error message to be
5821 recorded - for instance if somebody sent an entire SpamAssassin report back
5822 as a large number of 550 error lines. This bug was coincidentally fixed by
5823 increasing the size of one of Exim's internal buffers (big_buffer) that
5824 happened as part of the Exiscan merge. However, to be on the safe side, I
5825 have made the code more robust (and fixed the comments that describe what
5828 33. Some experimental protocols are using DNS PTR records for new purposes. The
5829 keys for these records are domain names, not reversed IP addresses. The
5830 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5831 leaves it alone. Component reversal etc. now happens only for IP addresses.
5834 34. The host_aton() function is supposed to be passed a string that is known
5835 to be a valid IP address. However, in the case of IPv6 addresses, it was
5836 not checking this. This is a hostage to fortune. Exim now panics and dies
5837 if the condition is not met. A case was found where this could be provoked
5838 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5839 components; fortuitously, this particular loophole had already been fixed
5840 by change 4.50/55 or 4.44/33 above.
5842 If there are any other similar loopholes, the new check in host_aton()
5843 itself should stop them being exploited. The report I received stated that
5844 data on the command line could provoke the exploit when Exim was running as
5845 exim, but did not say which command line option was involved. All I could
5846 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5847 running as the user.
5850 35. There was a buffer overflow vulnerability in the SPA authentication code
5851 (which came originally from the Samba project). I have added a test to the
5852 spa_base64_to_bits() function which I hope fixes it.
5855 36. The daemon start-up calls getloadavg() while still root for those OS that
5856 need the first call to be done as root, but it missed one case: when
5857 deliver_queue_load_max is set with deliver_drop_privilege. This is
5858 necessary for the benefit of the queue runner, because there is no re-exec
5859 when deliver_drop_privilege is set.
5861 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5862 was in use, was not putting the data itself into the right store pool;
5863 consequently, it could be overwritten for a subsequent message in the same
5864 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5867 38. Sometimes the final signoff response after QUIT could fail to get
5868 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5869 < 0 before doing a fflush(). This bug looks as though it goes back to the
5870 introduction of TLS in release 3.20, but "sometimes" must have been rare
5871 because the tests only now provoked it.
5877 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5878 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5879 Now it returns an integer. A number of calls were still expecting a T/F
5880 return. Fortuitously, in all cases, the tests worked in OK situations,
5881 which is the norm. However, things would have gone wrong on any write
5882 failures on the smtp file descriptor. This function is used when sending
5883 messages over SMTP and also when doing verify callouts.
5885 2. When Exim is called to do synchronous delivery of a locally submitted
5886 message (the -odf or -odi options), it no longer closes stderr before doing
5889 3. Implemented the mua_wrapper option.
5891 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5893 5. Implemented the functions header_remove(), header_testname(),
5894 header_add_at_position(), and receive_remove_recipient(), and exported them
5897 6. If an ACL "warn" statement specified the addition of headers, Exim already
5898 inserted X-ACL-Warn: at the start if there was no header name. However, it
5899 was not making this test for the second and subsequent header lines if
5900 there were newlines in the string. This meant that an invalid header could
5901 be inserted if Exim was badly configured.
5903 7. Allow an ACL "warn" statement to add header lines at the start or after all
5904 the Received: headers, as well as at the end.
5906 8. Added the rcpt_4xx retry error code.
5908 9. Added postmaster_mailfrom=xxx to callout verification option.
5910 10. Added mailfrom=xxxx to the callout verification option, for verify=
5913 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5914 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5916 12. Inserted some casts to stop certain compilers warning when using pointer
5917 differences as field lengths or precisions in printf-type calls (mostly
5918 affecting debugging statements).
5920 13. Added optional readline() support for -be (dynamically loaded).
5922 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5923 same clock tick as a message's arrival, so that its received time was the
5924 same as the "first fail" time on the retry record, and that message
5925 remained on the queue past the ultimate address timeout, every queue runner
5926 would try a delivery (because it was past the ultimate address timeout) but
5927 after another failure, the ultimate address timeout, which should have then
5928 bounced the address, did not kick in. This was a "< instead of <=" error;
5929 in most cases the first failure would have been in the next clock tick
5930 after the received time, and all would be well.
5932 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5933 being recognized when the domain list was tested by the match_domain
5934 condition in an expansion string.
5936 16. Added the ${str2b64: operator.
5938 17. Exim was always calling setrlimit() to set a large limit for the number of
5939 processes, without checking whether the existing limit was already
5940 adequate. (It did check for the limit on file descriptors.) Furthermore,
5941 errors from getrlimit() and setrlimit() were being ignored. Now they are
5942 logged to the main and panic logs, but Exim does carry on, to try to do its
5943 job under whatever limits there are.
5945 18. Imported PCRE 5.0.
5947 19. Trivial typo in log message " temporarily refused connection" (the leading
5950 20. If the log selector return_path_on_delivery was set and an address was
5951 redirected to /dev/null, the delivery process crashed because it assumed
5952 that a return path would always be set for a "successful" delivery. In this
5953 case, the whole delivery is bypassed as an optimization, and therefore no
5956 21. Internal re-arrangement: the function for sending a challenge and reading
5957 a response while authentication was assuming a zero-terminated challenge
5958 string. It's now changed to take a pointer and a length, to allow for
5959 binary data in such strings.
5961 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5963 23. Exim was not respecting finduser_retries when seeking the login of the
5964 uid under which it was called; it was always trying 10 times. (The default
5965 setting of finduser_retries is zero.) Also, it was sleeping after the final
5966 failure, which is pointless.
5968 24. Implemented tls_on_connect_ports.
5970 25. Implemented acl_smtp_predata.
5972 26. If the domain in control=submission is set empty, Exim assumes that the
5973 authenticated id is a complete email address when it generates From: or
5974 Sender: header lines.
5976 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5977 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5978 chown and chgrp in /bin and hostname in /usr/bin.
5980 28. Exim was keeping the "process log" file open after each use, just as it
5981 does for the main log. This opens the possibility of it remaining open for
5982 long periods when the USR1 signal hits a daemon. Occasional processlog
5983 errors were reported, that could have been caused by this. Anyway, it seems
5984 much more sensible not to leave this file open at all, so that is what now
5987 29. The long-running daemon process does not normally write to the log once it
5988 has entered its main loop, and it closes the log before doing so. This is
5989 so that log files can straightforwardly be renamed and moved. However,
5990 there are a couple of unusual error situations where the daemon does write
5991 log entries, and I had neglected to close the log afterwards.
5993 30. The text of an SMTP error response that was received during a remote
5994 delivery was being truncated at 512 bytes. This is too short for some of
5995 the long messages that one sometimes sees. I've increased the limit to
5998 31. It is now possible to make retry rules that apply only when a message has a
5999 specific sender, in particular, an empty sender.
6001 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6002 it possible to be selective about when SMTP synchronization is enforced.
6004 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6006 32. Implemented hosts_connection_nolog.
6008 33. Added an ACL for QUIT.
6010 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6013 35. Added mailbox_size and mailbox_filecount to appendfile.
6015 36. Added control = no_multiline_responses to ACLs.
6017 37. There was a bug in the logic of the code that waits for the clock to tick
6018 in the case where the clock went backwards by a substantial amount such
6019 that the microsecond fraction of "now" was more than the microsecond
6020 fraction of "then" (but the whole seconds number was less).
6022 38. Added support for the libradius Radius client library this is found on
6023 FreeBSD (previously only the radiusclient library was supported).
6029 1. When certain lookups returned multiple values in the form name=value, the
6030 quoting of the values was not always being done properly. Specifically:
6031 (a) If the value started with a double quote, but contained no whitespace,
6033 (b) If the value contained whitespace other than a space character (i.e.
6034 tabs or newlines or carriage returns) it was not quoted.
6035 This fix has been applied to the mysql and pgsql lookups by writing a
6036 separate quoting function and calling it from the lookup code. The fix
6037 should probably also be applied to nisplus, ibase and oracle lookups, but
6038 since I cannot test any of those, I have not disturbed their existing code.
6040 2. A hit in the callout cache for a specific address caused a log line with no
6041 reason for rejecting RCPT. Now it says "Previous (cached) callout
6042 verification failure".
6044 3. There was an off-by-one bug in the queryprogram router. An over-long
6045 return line was truncated at 256 instead of 255 characters, thereby
6046 overflowing its buffer with the terminating zero. As well as fixing this, I
6047 have increased the buffer size to 1024 (and made a note to document this).
6049 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6050 when Exim is waiting for an SMTP response from a remote server, Exim
6051 restarts its select() call on the socket, thereby resetting its timeout.
6052 This is not a problem when such interrupts are rare. Somebody set up a cron
6053 job to run exiwhat every 2 minutes, which is less than the normal select()
6054 timeout (5 or 10 minutes). This meant that the select() timeout never
6055 kicked in because it was always reset. I have fixed this by comparing the
6056 time when an interrupt arrives with the time at the start of the first call
6057 to select(). If more time than the timeout has elapsed, the interrupt is
6058 treated as a timeout.
6060 5. Some internal re-factoring in preparation for the addition of Sieve
6061 extensions (by MH). In particular, the "personal" test is moved to a
6062 separate function, and given an option for scanning Cc: and Bcc: (which is
6063 not set for Exim filters).
6065 6. When Exim created an email address using the login of the caller as the
6066 local part (e.g. when creating a From: or Sender: header line), it was not
6067 quoting the local part when it contained special characters such as @.
6069 7. Installed new OpenBSD configuration files.
6071 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6072 try to make them clearer.
6074 9. Callout options, other than the timeout value, were being ignored when
6075 verifying sender addresses in header lines. For example, when using
6077 verify = header_sender/callout=no_cache
6079 the cache was (incorrectly) being used.
6081 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6082 only the Cygwin environment.
6084 11. When return_path_on_delivery was set as a log selector, if different remote
6085 addresses in the same message used different return paths and parallel
6086 remote delivery occurred, the wrong values would sometimes be logged.
6087 (Whenever a remote delivery process finished, the return path value from
6088 the most recently started remote delivery process was logged.)
6090 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6091 lines when AUTH and/or TLS are in use. This is the "received protocol"
6092 field. Exim used to use "asmtp" for authenticated SMTP, without any
6093 indication (in the protocol name) for TLS use. Now it follows the RFC and
6094 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6095 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6096 names appear in log lines as well as in Received: header lines.
6098 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6099 extensions, and comparison tests, and to fix some bugs.
6101 14. Changes to the "personal" filter test:
6103 (1) The test was buggy in that it was just doing the equivalent of
6104 "contains" tests on header lines. For example, if a user's address was
6105 anne@some.where, the "personal" test would incorrectly be true for
6107 To: susanne@some.where
6109 This test is now done by extracting each address from the header in turn,
6110 and checking the entire address. Other tests that are part of "personal"
6111 are now done using regular expressions (for example, to check local parts
6112 of addresses in From: header lines).
6114 (2) The list of non-personal local parts in From: addresses has been
6115 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6116 taken from the Sieve specification recommendations.
6118 (3) If the message contains any header line starting with "List-" it is
6119 treated as non-personal.
6121 (4) The test for "circular" in the Subject: header line has been removed
6122 because it now seems ill-conceived.
6124 15. Minor typos in src/EDITME comments corrected.
6126 16. Installed latest exipick from John Jetmore.
6128 17. If headers_add on a router specified a text string that was too long for
6129 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6130 of string_sprintf() is now avoided.
6132 18. $message_body_size was not set (it was always zero) when running the DATA
6133 ACL and the local_scan() function.
6135 19. For the "mail" command in an Exim filter, no default was being set for
6136 the once_repeat time, causing a random time value to be used if "once" was
6137 specified. (If the value happened to be <= 0, no repeat happened.) The
6138 default is now 0s, meaning "never repeat". The "vacation" command was OK
6139 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6140 (I found it when inspecting the code).
6142 20. There is now an overall timeout for performing a callout verification. It
6143 defaults to 4 times the callout timeout, which applies to individual SMTP
6144 commands during the callout. The overall timeout applies when there is more
6145 than one host that can be tried. The timeout is checked before trying the
6146 next host. This prevents very long delays if there are a large number of
6147 hosts and all are timing out (e.g. when the network connections are timing
6148 out). The value of the overall timeout can be changed by specifying an
6149 additional sub-option for "callout", called "maxwait". For example:
6151 verify = sender/callout=5s,maxwait=20s
6153 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6154 to the end before writing, but this should make it even safer).
6156 22. Exim was forgetting that it had advertised PIPELINING for the second and
6157 subsequent messages on an SMTP connection. It was also not resetting its
6158 memory on STARTTLS and an internal HELO.
6160 23. When Exim logs an SMTP synchronization error within a session, it now
6161 records whether PIPELINING has been advertised or not.
6163 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6164 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6165 rather than long int.
6167 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6169 26. Added the never_mail option to autoreply.
6175 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6176 crash if the getsockname() call failed; this can happen if a connection is
6177 closed very soon after it is established. The problem was simply in the
6178 order in which certain operations were done, causing Exim to try to write
6179 to the SMTP stream before it had set up the file descriptor. The bug has
6180 been fixed by making things happen in the correct order.
6186 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6187 before the connection was closed, thus losing the rejection response.
6189 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6190 some early Solaris releases, but causes trouble in current releases where
6191 socklen_t is defined.
6193 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6196 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6199 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6200 that releasing the top of it at the end releases what was used for sub-
6201 expansions (unless the block got too big). However, discard this block if
6202 the first thing is a variable or header, so that we can use its block when
6203 it is dynamic (useful for very large $message_headers, for example).
6205 6. Lookups now cache *every* query, not just the most recent. A new, separate
6206 store pool is used for this. It can be recovered when all lookup caches are
6207 flushed. Lookups now release memory at the end of their result strings.
6208 This has involved some general refactoring of the lookup sources.
6210 7. Some code has been added to the store_xxx() functions to reduce the amount
6211 of flapping under certain conditions.
6213 8. log_incoming_interface used to affect only the <= reception log lines. Now
6214 it causes the local interface and port to be added to several more SMTP log
6215 lines, for example "SMTP connection from", and rejection lines.
6217 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6219 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6221 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6222 could be overwritten at the end of the current message (or the start of a
6223 new message if it was set in a HELO ACL). The value is now preserved for
6224 the duration of the SMTP connection.
6226 12. If a transport had a headers_rewrite setting, and a matching header line
6227 contained an unqualified address, that address was qualified, even if it
6228 did not match any rewriting rules. The underlying bug was that the values
6229 of the flags that permit the existence of unqualified sender and recipient
6230 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6231 non-local messages, and by -bnq for local messages) were not being
6232 preserved with the message after it was received.
6234 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6235 "next input=" as part of the text comprising the host identity instead of
6236 the correct text. The code was using the same buffer for two different
6237 strings. However, depending on which order the printing function evaluated
6238 its arguments, the bug did not always show up. Under Linux, for example, my
6239 test suite worked just fine.
6241 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6242 doesn't work with some older versions of Perl. It has been changed to "my",
6243 which in any case is probably the better facility to use.
6245 15. A really picky compiler found some instances of statements for creating
6246 error messages that either had too many or two few arguments for the format
6249 16. The size of the buffer for calls to the DNS resolver has been increased
6250 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6251 for addresses that have a lot of PTR records. This alleviates a problem; it
6252 does not fully solve it.
6254 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6255 buffer now truncates the list and logs the incident, which is the same
6256 action as happens when Exim is looking up a host name and its aliases.
6257 Previously in this situation something unpredictable would happen;
6258 sometimes it was "internal error: store_reset failed".
6260 18. If a server dropped the connection unexpectedly when an Exim client was
6261 using GnuTLS and trying to read a response, the client delivery process
6262 crashed while trying to generate an error log message.
6264 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6265 string, for example:
6267 warn message = H1: something\nH2: something
6269 the text was added as a single header line from Exim's point of view
6270 though it ended up OK in the delivered message. However, searching for the
6271 second and subsequent header lines using $h_h2: did not work. This has been
6272 fixed. Similarly, if a system filter added multiple headers in this way,
6273 the routers could not see them.
6275 20. Expanded the error message when iplsearch is called with an invalid key to
6276 suggest using net-iplsearch in a host list.
6278 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6279 ACLs are no longer actually imposed (and a message to that effect is
6282 22. If a "gecos" field in a passwd entry contained escaped characters, in
6283 particular, if it contained a \" sequence, Exim got it wrong when building
6284 a From: or a Sender: header from that name. A second bug also caused
6285 incorrect handling when an unquoted " was present following a character
6286 that needed quoting.
6288 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6289 was not being matched caselessly.
6291 24. Arranged for all hyphens in the exim.8 source to be escaped with
6294 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6295 properly. Recipient callout cache records were still being keyed to include
6296 the sender, even when use_sender was set false. This led to far more
6297 callouts that were necessary. The sender is no longer included in the key
6298 when use_sender is false.
6300 26. Added "control = submission" modifier to ACLs.
6302 27. Added the ${base62d: operator to decode base 62 numbers.
6304 28. dnsdb lookups can now access SRV records.
6306 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6307 the configuration file.
6309 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6310 (-v) mode. This makes the output for a verbose queue run more intelligible.
6312 31. Added a use_postmaster feature to recipient callouts.
6314 32. Added the $body_zerocount variable, containing the number of binary zero
6315 bytes in the message body.
6317 33. The time of last modification of the "new" subdirectory is now used as the
6318 "mailbox time last read" when there is a quota error for a maildir
6321 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6323 35. Added +ignore_unknown as a special item in host lists.
6325 36. Code for decoding IPv6 addresses in host lists is now included, even if
6326 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6327 address was recognized as an IP address, but was then not correctly decoded
6328 into binary, causing unexpected and incorrect effects when compared with
6335 1. Very minor rewording of debugging text in manualroute to say "list of
6336 hosts" instead of "hostlist".
6338 2. If verify=header_syntax was set, and a header line with an unqualified
6339 address (no domain) and a large number of spaces between the end of the
6340 name and the colon was received, the reception process suffered a buffer
6341 overflow, and (when I tested it) crashed. This was caused by some obsolete
6342 code that should have been removed. The fix is to remove it!
6344 3. When running in the test harness, delay a bit after writing a bounce
6345 message to get a bit more predictability in the log output.
6347 4. Added a call to search_tidyup() just before forking a reception process. In
6348 theory, someone could use a lookup in the expansion of smtp_accept_max_
6349 per_host which, without the tidyup, could leave open a database connection.
6351 5. Added the variables $recipient_data and $sender_data which get set from a
6352 lookup success in an ACL "recipients" or "senders" condition, or a router
6353 "senders" option, similar to $domain_data and $local_part_data.
6355 6. Moved the writing of debug_print from before to after the "senders" test
6358 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6359 problems for message scanning, either using a data ACL, or using
6360 local_scan() because the Received: header was not generated till after they
6361 were called (in order to set the time as the time of reception completion).
6362 I have revised the way this works. The header is now generated after the
6363 body is received, but before the ACL or local_scan() are called. After they
6364 are run, the timestamp in the header is updated.
6370 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6371 before starting a queue runner without re-exec. This happened only when
6372 deliver_drop_privilege was set or when the Exim user was set to root. The
6373 effect of the bug was that timeouts during subsequent deliveries caused
6374 crashes instead of being properly handled. The handler is now left at its
6375 default (and expected) setting.
6377 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6378 message, again when deliver_drop_privilege is set or Exim is run as root.
6379 The bug described in (1) was not present in this case, but the tidying up
6380 of the other signals was missing. I have made the two cases consistent.
6382 3. The ignore_target_hosts setting on a manualroute router was being ignored
6383 for hosts that were looked up using the /MX notation.
6385 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6388 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6389 operated on the sender address. After changing the $sender_address to <>
6390 for the sender address verify, Exim was re-instated it as the original
6391 (before rewriting) address, but remembering that it had rewritten it, so it
6392 wasn't rewriting it again. This bug also had the effect of breaking the
6393 sender address verification caching when the sender address was rewritten.
6395 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6396 This has been changed so that if the ip literal address matches
6397 ignore_target_hosts, the router declines.
6399 7. Added expansion conditions match_domain, match_address, and match_local_
6400 part (NOT match_host).
6402 8. The placeholder for the Received: header didn't have a length field set.
6404 9. Added code to Exim itself and to exim_lock to test for a specific race
6405 condition that could lead to file corruption when using MBX delivery. The
6406 issue is with the lockfile that is created in /tmp. If this file is removed
6407 after a process has opened it but before that process has acquired a lock,
6408 there is the potential for a second process to recreate the file and also
6409 acquire a lock. This could lead to two Exim processes writing to the file
6410 at the same time. The added code performs the same test as UW imapd; it
6411 checks after acquiring the lock that its file descriptor still refers to
6412 the same named file.
6414 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6415 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6418 11. Added the smtp_active_hostname option. If used, this will typically be made
6419 to depend on the incoming interface address. Because $interface_address is
6420 not set up until the daemon has forked a reception process, error responses
6421 that can happen earlier (such as "too many connections") no longer contain
6424 12. If an expansion in a condition on a "warn" statement fails because a lookup
6425 defers, the "warn" statement is abandoned, and the next ACL statement is
6426 processed. Previously this caused the whole ACL to be aborted.
6428 13. Added the iplsearch lookup type.
6430 14. Added ident_timeout as a log selector.
6432 15. Added tls_certificate_verified as a log selector.
6434 16. Added a global option tls_require_ciphers (compare the smtp transport
6435 option of the same name). This controls incoming TLS connections.
6437 17. I finally figured out how to make tls_require_ciphers do a similar thing
6438 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6439 before starting the TLS session.
6441 18. Tabs are now shown as \t in -bP output.
6443 19. If the log selector return_path_on_delivery was set, Exim crashed when
6444 bouncing a message because it had too many Received: header lines.
6446 20. If two routers both had headers_remove settings, and the first one included
6447 a superfluous trailing colon, the final name in the first list and the
6448 first name in the second list were incorrectly joined into one item (with a
6449 colon in the middle).
6455 1. Added -C and -D options to the exinext utility, mainly to make it easier
6456 to include in the automated testing, but these could be helpful when
6457 multiple configurations are in use.
6459 2. The exinext utility was not formatting the output nicely when there was
6460 an alternate port involved in the retry record key, nor when there was a
6461 message id as well (for retries that were specific to a specific message
6462 and a specific host). It was also confused by IPv6 addresses, because of
6463 the additional colons they contain. I have fixed the IPv4 problem, and
6464 patched it up to do a reasonable job for IPv6.
6466 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6467 delivery, the log line now contains "pipelined" if PIPELINING was used.
6469 4. An SMTP transport process used to panic and die if the bind() call to set
6470 an explicit outgoing interface failed. This has been changed; it is now
6471 treated in the same way as a connect() failure.
6473 5. A reference to $sender_host_name in the part of a conditional expansion
6474 that was being skipped was still causing a DNS lookup. This no longer
6477 6. The def: expansion condition was not recognizing references to header lines
6478 that used bh_ and bheader_.
6480 7. Added the _cache feature to named lists.
6482 8. The code for checking quota_filecount in the appendfile transport was
6483 allowing one more file than it should have been.
6485 9. For compatibility with Sendmail, the command line option
6493 and sets the incoming protocol and host name (for trusted callers). The
6494 host name and its colon can be omitted when only the protocol is to be set.
6495 Note the Exim already has two private options, -pd and -ps, that refer to
6496 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6497 "s", but I don't think that's a major issue.
6499 10. A number of refactoring changes to the code, none of which should affect
6502 (a) The number of logging options was getting close to filling up the
6503 32-bit word that was used as a bit map. I have split them into two classes:
6504 those that are passed in the argument to log_write(), and those that are
6505 only ever tested independently outside of that function. These are now in
6506 separate 32-bit words, so there is plenty of room for expansion again.
6507 There is no change in the user interface or the logging behaviour.
6509 (b) When building, for example, log lines, the code previously used a
6510 macro that called string_cat() twice, in order to add two strings. This is
6511 not really sufficiently general. Furthermore, there was one instance where
6512 it was actually wrong because one of the argument was used twice, and in
6513 one call a function was used. (As it happened, calling the function twice
6514 did not affect the overall behaviour.) The macro has been replaced by a
6515 function that can join an arbitrary number of extra strings onto a growing
6518 (c) The code for expansion conditions now uses a table and a binary chop
6519 instead of a serial search (which was left over from when there were very
6520 few conditions). Also, it now recognizes conditions like "pam" even when
6521 the relevant support is not compiled in: a suitably worded error message is
6522 given if an attempt is made to use such a condition.
6524 11. Added ${time_interval:xxxxx}.
6526 12. A bug was causing one of the ddress fields not to be passed back correctly
6527 from remote delivery subprocesses. The field in question was not being
6528 subsequently used, so this caused to problems in practice.
6530 13. Added new log selectors queue_time and deliver_time.
6532 14. Might have fixed a bug in maildirsizefile handling that threw up
6533 "unexpected character" debug warnings, and recalculated the data
6534 unnecessarily. In any case, I expanded the warning message to give more
6537 15. Added the message "Restricted characters in address" to the statements in
6538 the default ACL that block characters like @ and % in local parts.
6540 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6541 Three changes have been made:
6543 (a) There was a serious bug; a negative response to MAIL caused the whole
6544 recipient domain to be cached as invalid, thereby blocking all messages
6545 to all local parts at the same domain, from all senders. This bug has
6546 been fixed. The domain is no longer cached after a negative response to
6547 MAIL if the sender used is not empty.
6549 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6552 (c) A new callout option, "use_sender" has been added for people who want
6553 the modified behaviour.
6559 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6562 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6563 indeed breaks things for older releases.
6565 3. Added additional logging to the case where there is a problem reading data
6566 from a filter that is running in a subprocess using a pipe, in order to
6567 try to track down a specific problem.
6569 4. Testing facility fudge: when running in the test harness and attempting
6570 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6571 getting "No route to host". Convert this to a timeout.
6573 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6576 6. Some OS don't have socklen_t but use size_t instead. This affects the
6577 fifth argument of getsockopt() amongst other things. This is now
6578 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6579 can be set for individual OS. I have set it for SunOS5, OSF1, and
6580 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6581 some earlier ones do not.
6583 7. Change 4.30/15 was not doing the test caselessly.
6585 8. The standard form for an IPv6 address literal was being rejected by address
6586 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6587 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6588 this, as well as the form without the "IPv6" on the front (but only when
6589 address literals are enabled, of course).
6591 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6593 10. Exim crashed if a message with an empty sender address specified by -f
6594 encountered a router with an errors_to setting. This could be provoked only
6595 by a command such as
6599 where an empty string was supplied; "<>" did not hit this bug.
6601 11. Installed PCRE release 4.5.
6603 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6604 remained set. It is now erased.
6606 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6607 times from message ids (which are base 36 rather than the normal 62).
6609 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6610 were being counted as actual protocol errors, and logged if the log
6611 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6612 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6613 and DATA following a set of rejected RCPTs do not count as protocol errors.
6614 In other words, Exim assumes they were pipelined, though this may not
6615 actually be the case. Of course, in all cases the client gets an
6616 appropriate error code.
6618 15. If a lookup fails in an ACL condition, a message about the failure may
6619 be available; it is used if testing the ACL cannot continue, because most
6620 such messages specify what the cause of the deferral is. However, some
6621 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6622 that caused an old message to be retained and used if a later statement
6623 caused a defer, replacing the real cause of the deferral.
6625 16. If an IP address had so many PTR records that the DNS lookup buffer
6626 was not large enough to hold them, Exim could crash while trying to process
6627 the truncated data. It now detects and logs this case.
6629 17. Further to 4.21/58, another change has been made: if (and only if) the
6630 first line of a message (the first header line) ends with CRLF, a bare LF
6631 in a subsequent header line has a space inserted after it, so as not to
6632 terminate the header.
6634 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6635 unnecessarily, used atoi() instead of strtol(), and didn't check the
6636 termination when getting file sizes from file names by regex.
6638 19. Completely re-implemented the support for maildirsize files, in the light
6639 of a number of problems with the previous contributed implementation
6640 (4.30/29). In particular:
6642 . If the quota is zero, the maildirsize file is maintained, but no quota is
6645 . If the maildir directory does not exist, it is created before any attempt
6646 to write a maildirsize file.
6648 . The quota value in the file is just a cache; if the quota is changed in
6649 the transport, the new value overrides.
6651 . A regular expression is available for excluding directories from the
6654 20. The autoreply transport checks the characters in options that define the
6655 message's headers; it allows continued headers, but it was checking with
6656 isspace() after an embedded newline instead of explicitly looking for a
6659 21. If all the "regular" hosts to which an address was routed had passed their
6660 expiry times, and had not reached their retry times, the address was
6661 bounced, even if fallback hosts were defined. Now Exim should go on to try
6664 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6665 equivalent code in the SMTP transport. Some hosts send humungous responses
6666 to HELO/EHLO, more than 1024 it seems.
6668 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6669 gives compiler warnings in some environments. I've now done it "properly",
6672 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6673 (because of problems with the built-in one) was declared to return uschar *
6674 instead of char *, causing compiler failure.
6676 25. Fixed a file descriptor leak when processing alias/forward files.
6678 26. Fixed a minor format string issue in dbfn.c.
6680 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6682 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6683 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6686 29. When a sender address is verified, it is cached, to save repeating the test
6687 when there is more than one recipient in a message. However, when the
6688 verification involves a callout, it is possible for different callout
6689 options to be set for different recipients. It is too complicated to keep
6690 track of this in the cache, so now Exim always runs a verification when a
6691 callout is required, relying on the callout cache for the optimization.
6692 The overhead is duplication of the address routing, but this should not be
6695 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6696 to be verified with callout=postmaster, and the main callout worked but the
6697 postmaster check failed, the verification correctly failed. However, if a
6698 subsequent RCPT command asked for sender verification *without* the
6699 postmaster check, incorrect caching caused this verification also to fail,
6702 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6703 it was not caching the DNS options (qualify_single, search_parents) that
6704 were used when the lookup failed. A subsequent lookup with different
6705 options therefore always gave the same answer, though there were cases
6706 where it should not have. (Example: a "domains = !$mx_any" option on a
6707 dnslookup router: the "domains" option is always processed without any
6708 widening, but the router might have qualify_single set.) Now Exim uses the
6709 cached value only when the same options are set.
6711 32. Added John Jetmore's "exipick" utility to the distribution.
6713 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6714 than a timeout (e.g. a certificate is required, and is not provided), an
6715 Exim server now closes the connection immediately. Previously it waited for
6716 the client to close - but if the client is SSL, it seems that they each
6717 wait for each other, leading to a delay before one of them times out.
6719 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6720 maintained 0.8.x compatibility because I don't think many are using it, and
6721 it is clearly obsolete.
6723 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6726 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6727 client certificate was expired. A simple patch fixes this, though I don't
6728 understand the full logic of why the verify callback is called multiple
6731 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6732 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6733 which causes problems with some clients (such as the Certicom SSL Plus
6734 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6735 disables the coutermeasure allowing Eudora to connect."
6737 38. Exim was not checking that a write() to a log file succeeded. This could
6738 lead to Bad Things if a log got too big, in particular if it hit a file
6739 size limit. Exim now panics and dies if it cannot write to a log file, just
6740 as it does if it cannot open a log file.
6742 39. Modified OS/Makefile-Linux so that it now contains
6744 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6746 The two -D definitions ensure that Exim is compiled with large file
6747 support, which makes it possible to handle log files that are bigger than
6750 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6751 instance) a domain was checked against a named list that involved a lookup,
6752 causing $domain_data to be set, then another domain was checked against the
6753 same list, then the first domain was re-checked, the value of $domain_data
6754 after the final check could be wrong. In particular, if the second check
6755 failed, it could be set empty. This bug probably also applied to
6758 41. The strip_trailing_dot option was not being applied to the address given
6759 with the -f command-line option.
6761 42. The code for reading a message's header from the spool was incrementing
6762 $received_count, but never initializing it. This meant that the value was
6763 incorrect (doubled) while delivering a message in the same process in which
6764 it was received. In the most common configuration of Exim, this never
6765 happens - a fresh exec is done - but it can happen when
6766 deliver_drop_privilege is set.
6768 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6769 it now includes up to 150 characters of the unexpected data in the log
6772 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6773 and building data strings. The size of both of these buffers was 10 000
6774 bytes - far larger than anybody would *ever* want, thought I. Needless to
6775 say, somebody hit the limit. I have increased the maximum line length to
6776 20 000 and the maximum data length of concatenated lines to 100 000. I have
6777 also fixed two bugs, because there was no checking on these buffers. Tsk,
6778 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6779 buffer is too small.
6781 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6782 lsearch lookups. Now it does.
6784 46. When parsing a route_list item in a manualroute router, a fixed-length
6785 buffer was used for the list of hosts. I made this 1024 bytes long,
6786 thinking that nobody would ever have a list of hosts that long. Wrong.
6787 Somebody had a whole pile of complicated expansion conditions, and the
6788 string was silently truncated, leading to an expansion error. It turns out
6789 that it is easier to change to an unlimited length (owing to other changes
6790 that have happened since this code was originally written) than to build
6791 structure for giving a limitation error. The length of the item that
6792 expands into the list of hosts is now unlimited.
6794 47. The lsearch lookup could not handle data where the length of text line was
6795 more than 4095 characters. Such lines were truncated, leading to shortened
6796 data being returned. It should now handle lines of any length.
6798 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6799 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6802 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6803 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6804 no longer happens in comment lines. A list of replacements is now placed
6805 at the head of all of the source files, except those whose only change is
6806 to replace PERL_COMMAND in the very first #! line.
6808 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6809 messages on the queue, with a bottom-up merge sort, using code contributed
6810 by Michael Haardt. This should make operations like -bp somewhat faster on
6811 large queues. It won't affect queue runners, except when queue_run_in_order
6814 51. Installed eximstats 1.31 in the distribution.
6816 52. Added support for SRV lookups to the dnslookup router.
6818 53. If an ACL referred to $message_body or $message_body_end, the value was not
6819 reset for any messages that followed in the same SMTP session.
6821 54. The store-handling optimization for building very long strings was not
6822 differentiating between the different store pools. I don't think this
6823 actually made any difference in practice, but I've tidied it.
6825 55. While running the routers to verify a sender address, $sender_address
6826 was still set to the sender address. This is wrong, because when routing to
6827 send a bounce to the sender, it would be empty. Therefore, I have changed
6828 it so that, while verifying a sender address, $sender_address is set to <>.
6829 (There is no change to what happens when verifying a recipient address.)
6831 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6832 target A or AAAA records (if not already returned) without resetting the
6833 qualify_single or search_parents options of the DNS resolver. These are
6834 inappropriate in this case because the targets of MX and SRV records must
6835 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6836 target that, when qualified, matched something in the local domain. These
6837 two options are now turned off when doing these lookups.
6839 57. It seems that at least some releases of Reiserfs (which does not have the
6840 concept of a fixed number of inodes) returns zero and not -1 for the
6841 number of available inodes. This interacted badly with check_spool_inodes,
6842 which assumed that -1 was the "no such thing" setting. What I have done is
6843 to check that the total number of inodes is greater than zero before doing
6844 the test of how many are available.
6846 58. When a "warn" ACL statement has a log_message modifier, the message is
6847 remembered, and not repeated. This is to avoid a lot of repetition when a
6848 message has many recipients that cause the same warning to be written.
6849 However, Exim was preserving the list of already written lines for an
6850 entire SMTP session, which doesn't seem right. The memory is now reset if a
6851 new message is started.
6853 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6854 debugging output unless log_rewrite was also set.
6856 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6857 of (int)(handle) when we know that handle contains (void *)(-1).
6859 61. The Exim daemon panic-logs an error return when it closes the incoming
6860 connection. However "connection reset by peer" seems to be common, and
6861 isn't really an error worthy of noting specially, so that particular error
6864 62. When Exim is trying to find all the local interfaces, it used to panic and
6865 die if the ioctl to get the interface flags failed. However, it seems that
6866 on at least one OS (Solaris 9) it is possible to have an interface that is
6867 included in the list of interfaces, but for which you get a failure error
6868 for this call. This happens when the interface is not "plumbed" into a
6869 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6870 failure of the "get flags" call assumes that the interface is down.
6872 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6873 makes life easier for people who are doing arithmetic on fields extracted
6874 from dates, where you often get leading zeros that should not be
6875 interpreted as octal.
6877 64. Added qualify_domain to the redirect router, to override the global
6880 65. If a pathologically long header line contained very many addresses (the
6881 report of this problem mentioned 10 000) and each of them was rewritten,
6882 Exim could use up a very large amount of memory. (It kept on making new
6883 copies of the header line as it rewrote, and never released the old ones.)
6884 At the expense of a bit more processing, the header rewriting function has
6885 been changed so that it no longer eats memory in this way.
6887 66. The generation of the Received: header has been moved from the time that a
6888 message starts to be received, to the time that it finishes. The timestamp
6889 in the Received: header should now be very close to that of the <= log
6890 line. There are two side-effects of this change:
6892 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6893 logged header lines no longer include the local Received: line, because
6894 it has not yet been created. The same applies to a copy of the message
6895 that is returned to a non-SMTP sender when a message is rejected.
6897 (b) When a filter file is tested using -bf, no additional Received: header
6898 is added to the test message. After some thought, I decided that this
6901 This change does not affect the value of $received_for. It is still set
6902 after address rewriting, but before local_scan() is called.
6904 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6906 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6907 gave an unhelpful panic error message, and a defer error. I have managed to
6908 change this behaviour so that it now rejects any supplied certificate,
6909 which seems right, as the list of acceptable certificates is empty.
6911 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6912 gave an unhelpful defer error. I have not managed to make this reject any
6913 supplied certificates, but the error message it gives is "no certificate
6914 supplied", which is not helpful.
6916 70. exigrep's output now also includes lines that are not associated with any
6917 message, but which match the given pattern. Implemented by a patch from
6918 Martin Sluka, which also tidied up the Perl a bit.
6920 71. Recipient callout verification, like sender verification, was using <> in
6921 the MAIL FROM command. This isn't really the right thing, since the actual
6922 sender may affect whether the remote host accepts the recipient or not. I
6923 have changed it to use the actual sender in the callout; this means that
6924 the cache record is now keyed on a recipient/sender pair, not just the
6925 recipient address. There doesn't seem to be a real danger of callout loops,
6926 since a callout by the remote host to check the sender would use <>.
6927 [SEE ABOVE: changed after hitting problems.]
6929 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6930 temporary errors. However, in the case of such a code being given after
6931 the end of a data transmission (i.e. after ".") Exim was failing to write
6932 a retry record for the message. (Yes, there was some broken host that was
6933 actually sending 8xx at this point.)
6935 73. An unknown lookup type in a host list could cause Exim to panic-die when
6936 the list was checked. (An example that provoked this was putting <; in the
6937 middle of a list instead of at the start.) If this happened during a DATA
6938 ACL check, a -D file could be left lying around. This kind of configuration
6939 error no longer causes Exim to die; instead it causes a defer error. The
6940 incident is still logged to the main and panic logs.
6942 74. Buglet left over from Exim 3 conversion. The message "too many messages
6943 in one connection" was written to the rejectlog but not the mainlog, except
6944 when address rewriting (yes!) was being logged.
6946 75. Added write_rejectlog option.
6948 76. When a system filter was run not as root (that is, when system_filter_user
6949 was set), the values of the $n variables were not being returned to the
6950 main process; thus, they were not subsequently available in the $sn
6953 77. Added +return_path_on_delivery log selector.
6955 78. A connection timeout was being treated differently from recipients deferred
6956 when testing hosts_max_try with a message that was older than the host's
6957 retry timeout. (The host should not be counted, thus allowing all hosts to
6958 be tried at least once before bouncing.) This may have been the cause of an
6959 occasionally reported bug whereby a message would remain on the queue
6960 longer than the retry timeout, but would be bounced if a delivery was
6961 forced. I say "may" because I never totally pinned down the problem;
6962 setting up timeout/retry tests is difficult. See also the next item.
6964 79. The ultimate address timeout was not being applied to errors that involved
6965 a combination of host plus message (for example, a timeout on a MAIL
6966 command). When an address resolved to a number of possible hosts, and they
6967 were not all tried for each delivery (e.g. because of hosts_max_try), a
6968 message could remain on the queue longer than the retry timeout.
6970 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6973 81. Fixed an obscure SMTP outgoing bug which required at least the following
6974 conditions: (a) there was another message waiting for the same server;
6975 (b) the server returned 5xx to all RCPT commands in the first message so
6976 that the message was not completed; (c) the server dropped the connection
6977 or gave a negative response to the RSET that Exim sends to abort the
6978 transaction. The observed case was a dropped connection after DATA that had
6979 been sent in pipelining mode. That is, the server had advertised PIPELINING
6980 but was not implementing it correctly. The effect of the bug was incorrect
6981 behaviour, such as trying another host, and this could lead to a crash.
6987 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6988 and daemon.c were passed as pointers to ints; they should have been
6989 pointers to socklen_t variables (which are typically unsigned ints).
6991 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6994 3. Fixed a really odd bug that affected only the testing scheme; patching a
6995 certain fixed string in the binary changed the value of another string that
6996 happened to be identical to the end of the original first string.
6998 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6999 name", it returns that address as the IP address. On some operating
7000 systems (e.g. Solaris), it also passes back the IP address string as the
7001 "host name". However, on others (e.g. Linux), it passes back an empty
7002 string. Exim wasn't checking for this, and was changing the host name to an
7003 empty string, assuming it had been canonicalized.
7005 5. Although rare, it is permitted to have more than one PTR record for a given
7006 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7007 all the names associated with an address, because they do in Solaris.
7008 However, it seems that they do not in Linux for data that comes from the
7009 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7010 I found this out when I moved to a new Linux workstation and tried to run
7011 the Exim test suite.
7013 To get round this problem I have changed the code so that it now does its
7014 own call to the DNS to look up PTR records when searching for a host name.
7015 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7016 addresses that are only in /etc/hosts are still found.
7018 This behaviour is, however, controlled by an option called host_lookup_
7019 order, which defaults to "bydns:byaddr". If people want to use the other
7020 order, or indeed, just use one or the other means of lookup, they can
7021 specify it in this variable.
7023 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7024 some operating systems, this comes back from gethostbyaddr() as an empty
7025 string, and this is what Exim used to test for. However, it seems that in
7026 other systems, "." is yielded. Exim now tests for this case too.
7028 7. The values of check_spool_space and check_log_space are now held internally
7029 as a number of kilobytes instead of an absolute number of bytes. If a
7030 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7031 kilobyte. This means that much larger values can be stored.
7033 8. Exim monitor: an attempt to get the action menu when not actually pointing
7034 at a message produces an empty menu entitled "No message selected". This
7035 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7036 no entries in it ("Shell widget menu has zero width and/or height"). So I
7037 have added a single, blank menu entry in this case.
7039 9. Added ${quote_local_part.
7041 10. MIME decoding is now applied to the contents of Subject: header lines when
7044 11. Now that a reference to $sender_host_address automatically causes a reverse
7045 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7046 host lookup before query-style lookups in lists that might use this
7047 variable. This has therefore been abolished, and the "net-" prefix is no
7048 longer necessary for query-style lookups.
7050 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7051 have been a typo for LFLAGS, so it has been changed.
7053 13. The install script calls Exim with "-C /dev/null" in order to find the
7054 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7055 to be output. However, since Exim outputs its version number before the
7056 error, it didn't break the script. It just looked ugly. I fixed this by
7057 always allowing "-C /dev/null" if the caller is root.
7059 14. Ignore overlarge ACL variable number when reading spool file - insurance
7060 against a later release with more variables having written the file.
7062 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7063 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7064 this, as well as the form without the "IPv6" on the front.
7066 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7067 OS/Makefile-Darwin file.
7069 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7070 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7072 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7073 variable. However, some OS use ints for inodes. I've added cast to long int
7074 to get rid of the compiler warning.
7076 19. I had forgotten to lock out "/../" in configuration file names when
7077 ALT_CONFIG_PREFIX was set.
7079 20. Routers used for verification do not need to specify transports. However,
7080 if such a router generated a host list, and callout was configured, Exim
7081 crashed, because it could not find a port number from the (non-existent)
7082 transport. It now assumes port 25 in this circumstance.
7084 21. Added the -t option to exigrep.
7086 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7087 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7088 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7089 them is set, LOOKUP_LSEARCH is forced.
7091 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7093 24. Added sender and host information to the "rejected by local_scan()" log
7094 line; previously there was no indication of these.
7096 25. Added .include_if_exists.
7098 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7099 Linux. It turns out that not all file systems support this. Apparently some
7100 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7101 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7102 not supported on the file descriptor, is now ignored when Exim is trying to
7103 sync a directory. This applies only to Linux.
7105 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7107 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7108 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7111 29. Added support for maildirsize files from supplied patch (modified a bit).
7113 30. The use of :fail: followed by an empty string could lead Exim to respond to
7114 sender verification failures with (e.g.):
7116 550 Verification failed for <xxx>
7117 550 Sender verify failed
7119 where the first response line was missing the '-' that indicates it is not
7120 the final line of the response.
7122 31. The loop for finding the name of the user that called Exim had a hardwired
7123 limit of 10; it now uses the value of finduser_retries, which is used for
7124 all other user lookups.
7126 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7129 33. Exim was neglecting to zero errno before one call of strtol() when
7130 expanding a string and expecting an integer value. On some systems this
7131 resulted in spurious "integer overflow" errors. Also, it was casting the
7132 result into an int without checking.
7134 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7135 did not work. The code looks as if it has *never* worked, though it appears
7136 to have been documented since at least release 1.62. I have made it work.
7138 35. The "timeout_DNS" error in retry rules, also documented since at least
7139 1.62, also never worked. As it isn't clear exactly what this means, and
7140 clearly it isn't a major issue, I have abolished the feature by treating it
7141 as "timeout", and writing a warning to the main and panic logs.
7143 36. The display of retry rules for -brt wasn't always showing the error code
7146 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7147 timeout_connect_A, timeout_connect_MX.
7149 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7150 to the empty sender.
7152 39. The daemon was not analysing the content of -oX till after it had closed
7153 stderr and disconnected from the controlling terminal. This meant that any
7154 syntax errors were only noted on the panic log, and the return code from
7155 the command was 0. By re-arranging the code a little, I've made the
7156 decoding happen first, so such errors now appear on stderr, and the return
7157 code is 1. However, the actual setting up of the sockets still happens in
7158 the disconnected process, so errors there are still only recorded on the
7161 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7162 connections (as happens on some IP stacks) was logged at start up time as
7163 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7164 it from "IPv6 and IPv4", which means that two separate sockets are being
7167 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7168 says whether AF_INET or AF_INET6 was passed as an argument.
7170 42. Exiwhat output was messed up when time zones were included in log
7173 43. Exiwhat now gives more information about the daemon's listening ports,
7174 and whether -tls-on-connect was used.
7176 44. The "port" option of the smtp transport is now expanded.
7178 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7179 silently ignored. Now an error message is written to the main and panic
7182 46. There's a new ACL modifier called "logwrite" which writes to a log file
7183 as soon as it is encountered.
7185 47. Added $local_user_uid and $local_user_gid at routing time.
7187 48. Exim crashed when trying to verify a sender address that was being
7190 49. Exim was recognizing only a space character after ".include". It now also
7191 recognizes a tab character.
7193 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7194 extracting the relevant information from the specification. The man page no
7195 longer contains scrambled data for the -d option, and I've added a section
7196 at the front about calling Exim under different names.
7198 51. Added "extra_headers" argument to the "mail" command in filter files.
7200 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7203 53. Installed eximstats 1.29.
7205 54. Added transport_filter_timeout as a generic transport option.
7207 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7208 Cc: header lines. This was required by RFC 822, but it not required by RFC
7211 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7212 incoming messages that did not have them. Now it does so only if the
7213 message originates locally, that is, if there is no associated remote host
7214 address. When Resent- header lines are present, this applies to the Resent-
7215 lines rather than the non-Resent- lines.
7217 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7218 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7220 58. Messages for configuration errors now include the name of the main
7221 configuration file - useful now that there may be more than one file in a
7222 list (.included file names were always shown).
7224 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7225 for those rare installations that do not start the daemon as root or run it
7226 setuid root. I've cut out the call to initgroups() if the daemon is not
7229 60. The Exim user and group can now be bound into the binary as text strings
7230 that are looked up at the start of Exim's processing.
7232 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7234 62. Added $mailstore_basename variable.
7236 63. Installed patch to sieve.c from Michael Haardt.
7238 64. When Exim failed to open the panic log after failing to open the main log,
7239 the original message it was trying to log was written to stderr and debug
7240 output, but if they were not available (the usual case in production), it
7241 was lost. Now it is written to syslog before the two lines that record the
7242 failures to open the logs.
7244 65. Users' Exim filters run in subprocesses under the user's uid. It is
7245 possible for a "deliver" command or an alias in a "personal" command to
7246 provoke an address rewrite. If logging of address rewriting is configured,
7247 this fails because the process is not running as root or exim. There may be
7248 a better way of dealing with this, but for the moment (because 4.30 needs
7249 to be released), I have disabled address rewrite logging when running a
7250 filter in a non-root, non-exim process.
7256 1. The buildconfig auxiliary program wasn't quoting the value set for
7257 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7258 not defined. This bug was masked in 4.22 by the effect that was fixed in
7261 2. Some messages that were rejected after a message id was allocated were
7262 shown as "incomplete" by exigrep. It no longer does this for messages that
7263 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7265 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7266 have allow_domain_literals set, the ID did not get logged in the <= line.
7267 Domain literals are now always recognized in Message-ID: header lines.
7269 4. The first argument for a ${extract expansion item is the key name or field
7270 number. Leading and trailing spaces in this item were not being ignored,
7271 causing some misleading effects.
7273 5. When deliver_drop_privilege was set, single queue runner processes started
7274 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7275 same command in the process it spins off) were not dropping privilege.
7277 6. When the daemon running as "exim" started a queue runner, it always
7278 re-executed Exim in the spun-off process. This is a waste of effort when
7279 deliver_drop_privilege is set. The new process now just calls the
7280 queue-runner function directly.
7286 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7289 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7290 ignored. Though the use of -oP was forcing the writing of a pid file, it
7291 was always written to the default place.
7293 3. If the message "no IP address found for host xxxx" is generated during
7294 incoming verification, it is now followed by identification of the incoming
7295 connection (so you can more easily find what provoked it).
7297 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7299 5. Added some features to "harden" Exim a bit more against certain attacks:
7301 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7302 be put in Local/Makefile. This is like the never_users runtime option,
7303 but it cannot be overridden. The default setting is "root".
7305 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7306 prefix string with which any file named in a -C command line option
7309 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7310 is retained for -C and -D only if the caller of Exim is root. Without
7311 it, the exim user may also use -C and -D and retain privilege.
7313 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7314 command line option is disabled.
7316 6. Macro names set by the -D option must start with an upper case letter, just
7317 like macro names defined in the configuration file.
7319 7. Added "dereference=" facility to LDAP.
7321 8. Two instances of the typo "uknown" in the source files are fixed.
7323 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7324 the Configure-Makefile script screwed up while processing it.
7326 10. Incorporated PCRE 4.4.
7328 11. The SMTP synchronization check was not operating right at the start of an
7329 SMTP session. For example, it could not catch a HELO sent before the client
7330 waited for the greeting. There is now a check for outstanding input at the
7331 point when the greeting is written. Because of the duplex, asynchronous
7332 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7333 way, but not yet received, when the check is performed.
7335 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7336 on TCP/IP sockets, because this apparently causes some broken clients to
7339 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7340 unchanged) from the Cygwin maintainer.
7342 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7343 was supported instead of testing for mbx. Effectively a typo.
7345 15. The spa authenticator server code was not checking that the input it
7346 received was valid base64.
7348 16. The debug output line for the "set" modifier in ACLs was not showing the
7349 name of the variable that was being set.
7351 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7353 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7354 lookup on its own. Something else was needed to trigger the lookup. For
7355 example, a match in host_lookup or the need for a host name in a host list.
7356 Now, if $sender_host_name is referenced and the host name has not yet been
7357 looked up, a lookup is performed. If the lookup fails, the variable remains
7358 empty, and $host_lookup_failed is set to "1".
7360 19. Added "eqi" as a case-independent comparison operator.
7362 20. The saslauthd authentication condition could segfault if neither service
7363 nor realm was specified.
7365 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7366 error message that was logged was misleading, and incoming SMTP
7367 connections were dropped. The message is now more accurate, and temporary
7368 errors are given to SMTP connections.
7370 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7371 (except RSET) with a 421 error, until QUIT is received. However, it was
7372 failing to send a response to QUIT.
7374 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7375 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7376 ACL is now run after the helo_try_verify_hosts code.
7378 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7379 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7380 case-independent, so other case variants are also recognized). Apparently
7381 some systems use these upper case variants.
7383 25. If more than two messages were waiting for the same host, and a transport
7384 filter was specified for the transport, Exim sent two messages over the
7385 same TCP/IP connection, and then failed with "socket operation on non-
7386 socket" when it tried to send the third.
7388 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7390 27. The extern definition of crypt16() in expand.c was not being excluded when
7391 the OS had its own crypt16() function.
7393 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7394 as a preferred synonym for return_size_limit, both as an option and as an
7397 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7399 30. Changed the default configuration ACL to relax the local part checking rule
7400 for addresses that are not in any local domains. For these addresses,
7401 slashes and pipe symbols are allowed within local parts, but the sequence
7402 /../ is explicitly forbidden.
7404 31. SPA server authentication was not clearing the challenge buffer before
7407 32. log_message in a "warn" ACL statement was writing to the reject log as
7408 well as to the main log, which contradicts the documentation and doesn't
7409 seem right (because no rejection is happening). So I have stopped it.
7411 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7412 However, I am unable to do any testing of this.
7414 34. Fixed an infelicity in the appendfile transport. When checking directories
7415 for a mailbox, to see if any needed to be created, it was accidentally
7416 using path names with one or more superfluous leading slashes; tracing
7417 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7419 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7420 contents are added to the log line that is written for every discarded
7421 recipient. (Previously a log_message setting was ignored.)
7423 36. The ${quote: operator now quotes the string if it is empty.
7425 37. The install script runs exim in order to find its version number. If for
7426 some reason other than non-existence or emptiness, which it checks, it
7427 could not run './exim', it was installing it with an empty version number,
7428 i.e. as "exim-". This error state is now caught, and the installation is
7431 38. An argument was missing from the function that creates an error message
7432 when Exim fails to connect to the socket for saslauthd authentication.
7433 This could cause Exim to crash, or give a corrupted message.
7435 39. Added isip, isip4, and isip6 to ${if conditions.
7437 40. The ACL variables $acl_xx are now saved with the message, and can be
7438 accessed later in routers, transports, and filters.
7440 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7441 strings in the file are not string-expanded.
7443 42. If a MAIL command specified a SIZE value that was too large to fit into an
7444 int variable, the check against message_size_limit failed. Such values are
7445 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7446 day this will have to be increased, but I don't think I want to be around
7447 when emails are that large.
7454 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7455 iconv() is not standard in FreeBSD.
7457 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7458 IPv6 enabled. The observed symptom was a segmentation fault on return from
7459 the function os_common_find_running_interfaces() in src/os.c.
7461 3. In the check_special_case() function in daemon.c I had used "errno" as an
7462 argument name, which causes warnings on some systems. This was basically a
7463 typo, since it was named "eno" in the comments!
7465 4. The code that waits for the clock to tick (at a resolution of some fraction
7466 of a second) so as to ensure message-id uniqueness was always waiting for
7467 at least one whole tick, when it could have waited for less. [This is
7468 almost certainly not relevant at current processor speeds, where it is
7469 unlikely to ever wait at all. But we try to future-proof.]
7471 5. The function that sleeps for a time interval that includes fractions of a
7472 second contained a race. It did not block SIGALRM between setting the
7473 timer, and suspending (a couple of lines later). If the interval was short
7474 and the sigsuspend() was delayed until after it had expired, the suspension
7475 never ended. On busy systems this could lead to processes getting stuck for
7478 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7479 process, before it forks any delivery processes. The open lookup caching
7480 mechanism meant that the open file or database connection was passed into
7481 the delivery process. The problem was that delivery processes always tidy
7482 up cached lookup data. This could cause a problem for the next delivery
7483 process started by the queue runner, because the external queue runner
7484 process does not know about the closure. So the next delivery process
7485 still has data in the lookup cache. In the case of a file lookup, there was
7486 no problem because closing a file descriptor in a subprocess doesn't affect
7487 the parent. However, if the lookup was caching a connection to a database,
7488 the connection was closed, and the second delivery process was likely to
7489 see errors such as "PGSQL: query failed: server closed the connection
7490 unexpectedly". The problem has been fixed by closing all cached lookups
7491 in a queue runner before running a delivery process.
7493 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7494 seem to have the "const" qualifier which it has on other OS. I've
7497 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7498 *of the same type* (client or server) with the same public name that an
7499 error should be diagnosed.
7501 9. When Exim looked up a host name for an IP address, but failed to find the
7502 original IP address when looking up the host name (a safety check), it
7503 output the message "<ip address> does not match any IP for NULL", which was
7504 confusing, to say the least. The bug was that the host name should have
7505 appeared instead of "NULL".
7507 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7508 user that is built into the binary, and the -C or -D options is used, root
7509 privilege is dropped before the configuration file is read. In addition,
7510 logging is switched to stderr instead of the normal log files. If the
7511 configuration then re-defines the Exim user, the unprivileged environment
7512 is probably not what is expected, so Exim logs a panic warning message (but
7515 However, if deliver_drop_privilege is set, the unprivileged state may well
7516 be exactly what is intended, so the warning has been cut out in that case,
7517 and Exim is allowed to try to write to its normal log files.
7523 1. smtp_return_error_details was not giving details for temporary sender
7524 or receiver verification errors.
7526 2. Diagnose a configuration error if two authenticators have the same public
7529 3. Exim used not to create the message log file for a message until the first
7530 delivery attempt. This could be confusing when incoming messages were held
7531 for policy or load reasons. The message log file is now created at the time
7532 the message is received, and an initial "Received" line is written to it.
7534 4. The automatically generated man page for command line options had a minor
7535 bug that caused no ill effects; however, a more serious problem was that
7536 the procedure for building the man page automatically didn't always
7537 operate. Consequently, release 4.20 contains an out-of-date version. This
7538 shouldn't happen again.
7540 5. When building Exim with embedded Perl support, the script that builds the
7541 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7542 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7544 6. The freeze_tell option was not being used for messages that were frozen on
7545 arrival, either by an ACL or by local_scan().
7547 7. Added the smtp_incomplete_transaction log selector.
7549 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7550 was accepting AUTH without a new EHLO.
7552 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7553 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7556 10. Logging of TCP/IP connections (when configured) now happens in the main
7557 daemon process instead of the child process, so that the TCP/IP connection
7558 count is more accurate (but it can never be perfect).
7560 11. The use of "drop" in a nested ACL was not being handled correctly in the
7561 outer ACL. Now, if condition failure induced by the nested "drop" causes
7562 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7563 or "require"), the connection is dropped.
7565 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7566 that yield "discard" can now be used with an "accept" or a "discard" verb,
7567 but an error is generated for any others (because I can't see a useful way
7568 to define what should happen).
7570 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7571 are now processed in the same way as lines in the Exim configuration file.
7572 In particular, continuation lines are supported.
7574 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7576 15. Added -ti meaning -t -i.
7578 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7579 domains, and warn by logging if others are found.
7581 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7582 returned from GIFCONF when Exim is trying to find the list of interfaces on
7583 a host. The code in os.c has been modified to copy each ifreq to an aligned
7584 structure in all cases.
7586 Also, in some cases, the returned ifreq's were being copied to a 'struct
7587 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7588 means the last couple of bytes of an IPv6 address could be chopped if the
7589 ifreq contained only a normal sockaddr (14 bytes storage).
7591 18. Named domain lists were not supported in the hosts_treat_as_local option.
7592 An entry such as +xxxx was not recognized, and was treated as a literal
7595 19. Ensure that header lines added by a DATA ACL are included in the reject log
7596 if the ACL subsequently rejects the message.
7598 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7599 MD5 (which is deprecated).
7601 21. When testing a filter file using -bf, Exim was writing a message when it
7602 took the sender from a "From " line in the message, but it was not doing so
7603 when it took $return_path from a Return-Path: header line. It now does.
7605 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7606 with a valid header line field name (a series of printing characters
7607 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7609 23. Changed "disc" in the source to "disk" to conform to the documentation and
7610 the book and for uniformity.
7612 24. Ignore Sendmail's -Ooption=value command line item.
7614 25. When execve() failed while trying to run a command in a pipe transport,
7615 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7616 could be confused with a return value of 69 from the command itself. This
7617 has been changed to 127, the value the shell returns if it is asked to run
7618 a non-existent command. The wording for the related log line suggests a
7619 non-existent command as the problem.
7621 26. If received_header_text expands to an empty string, do not add a Received:
7622 header line to the message. (Well, it adds a token one on the spool, but
7623 marks it "old" so that it doesn't get used or transmitted.)
7625 27. Installed eximstats 1.28 (addition of -nt option).
7627 28. There was no check for failure on the call to getsockname() in the daemon
7628 code. This can fail if there is a shortage of resources on the system, with
7629 ENOMEM, for example. A temporary error is now given on failure.
7631 29. Contrary to the C standard, it seems that in some environments, the
7632 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7633 program. Exim now does this explicitly; it affects the formatting of
7634 timestamps using strftime().
7636 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7637 complaints. I've now initialized all the variables, to avoid this.
7639 32. Header lines added by a system filter were not being "seen" during
7640 transport-time rewrites.
7642 33. The info_callback() function passed to OpenSSL is set up with type void
7643 (*)(SSL *, int, int), as described somewhere. However, when calling the
7644 function (actually a macro) that sets it up, the type void(*)() is
7645 expected. I've put in a cast to prevent warnings from picky compilers.
7647 34. If a DNS black list lookup found a CNAME record, but there were no A
7648 records associated with the domain it pointed at, Exim crashed.
7650 35. If a DNS black list lookup returned more than one A record, Exim ignored
7651 all but the first. It now scans all returned addresses if a particular IP
7652 value is being sought. In this situation, the contents of the
7653 $dnslist_value variable are a list of all the addresses, separated by a
7656 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7657 to accept a host name and all its aliases if the forward lookup for any of
7658 them yielded the IP address of the incoming connection. Now it accepts only
7659 those names whose forward lookup yields the correct IP address. Any other
7660 names are discarded. This closes a loophole whereby a rogue DNS
7661 administrator could create reverse DNS records to break through a
7662 wildcarded host restriction in an ACL.
7664 37. If a user filter or a system filter that ran in a subprocess used any of
7665 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7666 the wrong values were passed to the pipe command ($thisaddress had the
7667 value of $0, $0 had the value of $1, etc). This bug was introduced by
7668 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7670 38. Improved the line breaking for long SMTP error messages from ACLs.
7671 Previously, if there was no break point between 40 and 75 characters, Exim
7672 left the rest of the message alone. Two changes have been made: (a) I've
7673 reduced the minimum length to 35 characters; (b) if it can't find a break
7674 point between 35 and 75 characters, it looks ahead and uses the first one
7675 that it finds. This may give the occasional overlong line, but at least the
7676 remaining text gets split now.
7678 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7679 file descriptors might be low, and that setting 1000 would always raise it.
7680 It turns out that in some environments, the limit is already over 1000 and
7681 that lowering it causes trouble. So now Exim takes care not to decrease it.
7683 40. When delivering a message, the value of $return_path is set to $sender_
7684 address at the start of routing (routers may change the value). By an
7685 oversight, this default was not being set up when an address was tested by
7686 -bt or -bv, which affected the outcome if any router or filter referred to
7689 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7690 log only when "message" or "log_message" are set. However, if one of the
7691 conditions was an address verification, or a call to a nested ACL, the
7692 messages generated by the underlying test were being passed through. This
7693 no longer happens. The underlying message is available in $acl_verify_
7694 message for both "message" and "log_message" expansions, so it can be
7695 passed through if needed.
7697 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7698 new expansion $bh_ to give the encoded byte string without charset
7699 translation. Translation happens only if iconv() is available; HAVE_ICONV
7700 indicates this at build time. HEADERS_CHARSET gives the charset to
7701 translate to; headers_charset can change it in the configuration, and
7702 "headers charset" can change it in an individual filter file.
7704 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7705 that creates RFC 2047 encoded "words" labels them as that charset instead
7706 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7707 expansion operator; (ii) when Exim creates a From: line for a local
7708 message; (iii) when a header line is rewritten to include a "phrase" part.
7710 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7711 buggy, causing it to skip the first lines of messages whose message ID
7712 ended in 'D'. This would not have bitten before Exim release 4.14, because
7713 message IDs were unlikely to end in 'D' before then. The effect was to have
7714 incorrect size information for certain domains.
7716 45. #include "config.h" was missing at the start of the crypt16.c module. This
7717 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7720 46. If there was a timeout during a "random" callout check, Exim treated it as
7721 a failure of the random address, and carried on sending RSET and the real
7722 address. If the delay was just some slowness somewhere, the response to the
7723 original RCPT would be taken as a response to RSET and so on, causing
7724 mayhem of various kinds.
7726 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7727 when I implemented it. It didn't allow for the fact that some option values
7728 may legitimately be negative (e.g. size_addition), and it didn't even do
7729 the right test for positive values.
7731 48. Domain names in DNS records are case-independent. Exim always looks them up
7732 in lower case. Some resolvers return domain names in exactly the case they
7733 appear in the zone file, that is, they may contain uppercase letters. Not
7734 all resolvers do this - some return always lower case. Exim was treating a
7735 change of case by a resolver as a change of domain, similar to a widening
7736 of a domain abbreviation. This triggered its re-routing code and so it was
7737 trying to route what was effectively the same domain again. This normally
7738 caused routing to fail (because the router wouldn't handle the domain
7739 twice). Now Exim checks for this case specially, and just changes the
7740 casing of the domain that it ultimately uses when it transmits the message
7743 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7746 50. If a filter generated a file delivery with a non-absolute name (possible if
7747 no home directory exists for the router), the forbid_file option was not
7750 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7751 the existing equality matching.
7753 52. Exim was using ints instead of ino_t variables in some places where it was
7754 dealing with inode numbers.
7756 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7757 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7758 called TMPDIR, and if it finds it is different, it changes its value.
7760 54. The smtp_printf() function is now made available to local_scan() so
7761 additional output lines can be written before returning. There is also an
7762 smtp_fflush() function to enable the detection of a dropped connection.
7763 The variables smtp_input and smtp_batched_input are exported to
7766 55. Changed the default runtime configuration: the message "Unknown user"
7767 has been removed from the ACL, and instead placed on the localuser router,
7768 using the cannot_route_message feature. This means that any verification
7769 failures that generate their own messages won't get overridden. Similarly,
7770 the "Unrouteable address" message that was in the ACL for unverifiable
7771 relay addresses has also been removed.
7773 56. Added hosts_avoid_esmtp to the smtp transport.
7775 57. The exicyclog script was not checking for the esoteric option
7776 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7777 will work only if exicyclog is run under the appropriate euid.
7779 58. Following a discussion on the list, the rules by which Exim recognises line
7780 endings on incoming messages have been changed. The -dropcr and drop_cr
7781 options are now no-ops, retained only for backwards compatibility. The
7782 following line terminators are recognized: LF CRLF CR. However, special
7783 processing applies to CR:
7785 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7786 nor a local message in the state where . is a terminator.
7788 (ii) If a bare CR is encountered in a header line, an extra space is added
7789 after the line terminator so as not to end the header. The reasoning
7790 behind this is that bare CRs in header lines are most likely either
7791 to be mistakes, or people trying to play silly games.
7793 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7794 was being incorrectly given as 18 bytes larger than it should have been.
7795 This is a VOB (very old bug).
7797 60. This may never have affected anything current, but just in case it has:
7798 When the local host is found other than at the start of a list of hosts,
7799 the local host, those with the same MX, and any that follow, are discarded.
7800 When the list in question was part of a longer list of hosts, the following
7801 hosts (not currently being processed) were also being discarded. This no
7802 longer happens. I'm not sure if this situation could ever has previously
7805 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7808 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7809 header. This is something that is recommended in a new Internet Draft, and
7810 is something that is documented as being done by Sendmail. There are two
7811 possible values. For messages generated by the autoreply transport, Exim
7814 Auto-Submitted: auto-replied
7816 whereas for all other generated messages (e.g. bounces) it adds
7818 Auto-Submitted: auto-generated
7820 63. The "personal" condition in filters now includes a test for the
7821 Auto-Submitted: header. If it contains the string "auto-" the message it
7822 not considered personal.
7824 64. Added rcpt_include_affixes as a generic transport option.
7826 65. Added queue_only_override (default true).
7828 66. Added the syslog_duplication option.
7830 67. If what should have been the first header line of a message consisted of
7831 a space followed by a colon, Exim was mis-interpreting it as a header line.
7832 It isn't of course - it is syntactically invalid and should therefore be
7833 treated as the start of the message body. The misbehaviour could have
7834 caused a number of strange effects, including loss of data in subsequent
7835 header lines, and spool format errors.
7837 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7838 client host had authenticated. This control can now be exercised by an ACL
7839 for more flexibility.
7841 69. By default, callouts do not happen when testing with -bh. There is now a
7842 variant, -bhc, which does actually run the callout code, including
7843 consulting and updating the callout cache.
7845 70. Added support for saslauthd authentication, courtesy of Alexander
7848 71. If statvfs() failed on the spool or log directories while checking their
7849 size for availability, Exim confusingly gave the error "space shortage".
7850 Furthermore, in debugging mode it crashed with a floating point exception.
7851 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7852 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7853 serious problem, Exim now writes to the main and panic logs when this
7854 happens, with details of the failure. It then refuses to accept the
7855 incoming message, giving the message "spool directory problem" or "log
7856 directory problem" with a 421 code for SMTP messages.
7858 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7859 0, 1, and 2 exist, because some OS complain for execs without them (see
7860 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7861 descriptors. However, the code omitted to check that the open succeeded,
7862 causing mysterious errors if for some reason the permissions on /dev/null
7863 got screwed. Now Exim writes a message to the main and panic logs, and
7864 bombs out if it can't open /dev/null.
7866 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7867 interact so that it is all more flexible. It is supposed to remain
7868 backwards compatible. Also added extra_local_interfaces.
7870 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7871 to bomb out with an assertion failure - to the client this appears as a
7872 connection drop. This problem occurs in the part of the code that was taken
7873 from the Samba project. Fortunately, the assertion is in a very simple
7874 function, so I have fixed this by reproducing the function inline in the
7875 one place where it is called, and arranging for authentication to fail
7876 instead of killing the process with assert().
7878 75. The SPA client code was not working when the server requested OEM rather
7879 than Unicode encoding.
7881 76. Added code to make require_files with a specific uid setting more usable in
7882 the case where statting the file as root fails - usually a non-root-mounted
7883 NFS file system. When this happens and the failure is EACCES, Exim now
7884 forks a subprocess and does the per-uid checking as the relevant uid.
7886 77. Added process_log_path.
7888 78. If log_file_path was not explicitly set, a setting of check_log_space or
7889 check_log_inodes was ignored.
7891 79. If a space check for the spool or log partitions fails, the incident is now
7892 logged. Of course, in the latter case the data may get lost...
7894 80. Added the %p formatting code to string_format() so that it can be used to
7895 print addresses in debug_print(). Adjusted all the address printing in the
7896 debugging in store.c to use %p rather than %d.
7898 81. There was a concern that a line of code in smtp_in.c could overflow a
7899 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7900 initially expressed, the concern was not well-founded, because trailing
7901 spaces are removed early. However, if the trailing spaces were followed by
7902 a NULL, they did not get removed, so the overflow was possible. Two fixes
7905 (a) I re-wrote the offending code in a cleaner fashion.
7906 (b) If an incoming SMTP command contains a NULL character, it is rejected
7909 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7910 runs initgroups(), so that if the Exim user is in any additional groups,
7911 they will be used during message reception.
7917 The change log for 4.20 and earlier releases has been archived.