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.
43 JH/01 Avoid costly startup code when not strictly needed. This reduces time
44 for some exim process initialisations. It does mean that the logging
45 of TLS configuration problems is only done for the daemon startup.
47 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
49 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
50 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
53 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
54 DKIM signing is being done. Previously a transport_filter would always
55 disable CHUNKING, falling back to traditional DATA.
57 JH/05 Regard command-line receipients as tainted.
59 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
61 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
62 PAM library frees one of the arguments given to it, despite the
63 documentation. Therefore a plain malloc must be used.
65 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
66 on-stack buffers were used, resulting in a taint trap when DSN information
67 copied from a received message was written into the buffer.
69 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
70 the ordering of its ARC headers. This caused a crash.
72 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
73 a new record was being constructed with information from the peer, a trap
76 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
77 installation would get error messages from DMARC verify, when it hit the
78 nonexistent file indicated by the default. Distros wanting DMARC enabled
79 should both provide the file and set the option.
80 Also enforce no DMARC verification for command-line sourced messages.
82 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
83 could, depending on the platform, hang at the STARTTLS response.
85 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
86 message on a connection. Previously if one message had ARC headers and
87 the following one did not, a crash could result when adding an
88 Authentication-Results: header.
90 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
91 Exim main code and Exim-related utities. The introduction of taint
92 tracking also did many adjustments to string handling. Since then, eximon
93 frequently terminated with an assert failure.
95 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
96 check for 452 responses. This slightly helps the inefficieny of doing
97 a large alias-expansion into a recipient-limited target. The max_rcpt
98 transport option still applies (and at the current default, will override
99 the new feature). The check is done for either cause of synch, and forces
100 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
101 connection. The new facility is not tunable at this time.
103 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
104 library live data was being used, so the results became garbage. Make
105 copies while it is still usable.
107 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
108 on delivery deferred (==) and failed (**) lines (if a delivery was
109 attemtped). Previously it was only on completion (=>) lines.
111 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
112 for the expansion of the server_scram_iter and server_scram_salt options.
114 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
115 are now specifically given a NO_DATA response without hitting the system
116 resolver. The library goes on to do the now-standard TXT lookup.
117 Use of dnsdb lookups is not affected.
119 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
120 only retrieve the errormessage once. Previously two calls to dlerror()
121 were used, and the second one (for mainlog/paniclog) retrieved null
124 JH/20 Taint checking: disallow use of tainted data for
125 - the appendfile transport file and directory options
126 - the pipe transport command
127 - the autoreply transport file, log and once options
128 - file names used by the redirect router (including filter files)
130 - paths used by single-key lookups
131 Previously this was permitted.
133 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
134 adjusted the size of a major service buffer; this failed because the
135 buffer was in use at the time. Change to a compile-time increase in the
136 buffer size, when this authenticator is compiled into exim.
138 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
139 previous fast-mode was untenable in the face of glibs using mmap to
140 support larger malloc requests.
142 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
143 New values supported, if defined on system where compiled:
144 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
145 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
147 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
148 running a limited number of proceses in parallel, a benefit is gained. The
149 amount varies with the platform hardware and load. The use of the option
150 queue_run_in_order means we cannot do this, as ordering becomes
153 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
154 had introduced a string-copy (for ensuring NUL-termination) which was not
155 appropriate for that case, which can include embedded NUL bytes in the
156 block of data. Investigation showed the copy to actually be needless, the
157 data being length-specified.
159 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
160 done during a receiving connection, and both used TLS, global info was
161 used rather than per-connection info for tracking the state of data
162 queued for transmission. This could result in a connection hang.
164 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
165 Previously, when delivering serveral messages down a single connection
166 only the first would provide a SIZE. This was due to the size information
167 not being properly tracked.
169 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
170 TAI (at 37 seconds currently), pretend to be in UTC for time-related
171 expansion and logging. Previously, spurious values such as a future
172 minute could be seen.
174 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
175 it could crash from a null-deref. This could also affect the
176 ${addresses: } operator and ${readsock } item.
178 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
179 message following a mime one, the variable was not reset.
181 JH/30 When an pipelined-connect fails at the first response, assume incorrect
182 cached capability (perhaps the peer reneged?) and immediately retry in
185 JH/31 Fix spurious detection of timeout while writing to transport filter.
187 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
188 an attempt to copy the string was made before checking it.
190 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
191 taint of the lookup key was maintained; we now regard the presence in the
192 filesystem as sufficient validation.
194 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
195 argument is supplied.
197 JH/35 The dsearch lookup now requires that the directory is an absolute path.
198 Previously this was not checked, and nonempty relative paths made an
199 access under Exim's current working directory.
201 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
202 Previously no event was raised.
204 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
205 parameter supplied by the sender MAIL FROM command. Previously it was
206 ignored, and only the check_spool_space option value for the required
209 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
210 the size of the signing public-key. Previously it was instead giving
211 the size of the signature hash.
213 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
214 the default. See the (new) dkim_verify_min_keysizes option.
216 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
217 and an ACL use a lookup for checking either the local_part or domain,
218 stale data could be accessed. Ensure that variable references are
219 dropped between messages.
221 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
222 by the client was not checked as pointing within response data before
223 being used. A malicious client could thus cause an out-of-bounds read and
224 possibly gain authentication. Fix by adding the check.
226 JH/42 Internationalisation: change the default for downconversion in the smtp
227 transport to be "if needed". Previously it was "as previously set" for
228 the message, which usually meant "if needed" for message-submission but
229 "no" for everything else. However, MTAs have been seen using SMTPUTF8
230 even when the envelope addresses did not need it, resulting in forwarding
231 failures to non-supporting MTAs. A downconvert in such cases will be
232 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
233 transport. The change does mean that addresses needing conversion will
234 be converted when previously a delivery failure would occur.
236 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
237 response was received it would be used unchecked in a fail-DSN, violating
238 standards on line-length limits. Truncate if needed.
240 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
241 doesn't work. (Additionally add a new main config option to configure the
248 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
249 side, to decode a TLS 1.3 packet capture.
251 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
252 Previously the default library behaviour applied, sending two, each in
255 JH/03 Debug output for ACL now gives the config file name and line number for
258 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
260 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
262 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
263 buffer overrun for (non-chunking) other transports.
265 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
266 TLS1.3, means that a server rejecting a client certificate is not visible
267 to the client until the first read of encrypted data (typically the
268 response to EHLO). Add detection for that case and treat it as a failed
269 TLS connection attempt, so that the normal retry-in-clear can work (if
270 suitably configured).
272 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
273 and/or domain. Found and fixed by Jason Betts.
275 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
276 configuration). If a CNAME target was not a wellformed name pattern, a
279 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
280 the OS reports them interleaved with other addresses.
282 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
283 used both for input and for a verify callout, both encrypted, SMTP
284 responses being sent by the server could be lost. This resulted in
285 dropped connections and sometimes bounces generated by a peer sending
288 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
289 string. Previously it was possible to cause undefined behaviour in a
290 library routine (usually a crash). Found by "zerons".
292 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
295 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
296 API was removed, so update to use the newer ones.
298 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
299 any timeout set, is taking a long time. Previously we would hang on to a
300 rotated logfile "forever" if the input was arriving with long gaps
301 (a previous attempt to fix addressed lack, for a long time, of initial
304 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
305 shared (NFS) environment. The length of the tempfile name is now
306 4 + 16 ("hdr.$message_exim_id") which might break on file
307 systems which restrict the file name length to lower values.
310 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
311 shared (NFS) environment.
313 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
314 did for all versions <4.90). Notably -M, -m, --invert, -I may be
317 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
318 on some platforms for bit 31.
320 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
321 to changes apparently associated with TLS1.3 handling some of the APIs
322 previously used were either nonfunctional or inappropriate. Strings
323 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
324 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
325 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
326 This affects log line X= elements, the $tls_{in,out}_cipher variables,
327 and the use of specific cipher names in the encrypted= ACL condition.
329 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
331 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
332 verification result was not updated unless hosts_require_ocsp applied.
334 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
335 queue_list_requires_admin set to false, non-admin users were denied the
338 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
339 directory-of-certs mode. Previously they were advertised despite the
342 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
343 A single TCP connection by a client will now hold a TLS connection open
344 for multiple message deliveries, by default. Previously the default was to
347 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
348 default. If built with the facility, DANE will be used. The facility
349 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
351 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
352 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
353 must be defined and you must still, unless you define DISABLE_TLS, manage
354 the the include-dir and library-file requirements that go with that
355 choice. Non-TLS builds are still supported.
357 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
360 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
361 default. If the platform supports and has the facility enabled, it will
362 be requested on all coneections.
364 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
365 controlled by the build-time option SUPPORT_PIPE_CONNECT.
367 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
369 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
370 success-DSN messages. Previously the From: header was always the default
371 one for these; the option was ignored.
373 JH/28 Fix the timeout on smtp response to apply to the whole response.
374 Previously it was reset for every read, so a teergrubing peer sending
375 single bytes within the time limit could extend the connection for a
376 long time. Credit to Qualsys Security Advisory Team for the discovery.
378 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
379 delivery address, which leaked information of the results of local
380 forwarding. Change to the original envelope recipient address, per
383 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
384 requested. Previously not bounce was generated and a log entry of
385 error ignored was made.
387 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
389 JH/32 Introduce a general tainting mechanism for values read from the input
390 channel, and values derived from them. Refuse to expand any tainted
391 values, to catch one form of exploit.
393 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
394 was unused and the unexpanded text used for the test. Found and
395 fixed by Ruben Jenster.
397 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
398 an attempt to use a TLS library read routine dereffed a nul pointer,
401 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
402 them in our smtp response.
404 JH/36 Have the general router option retry_use_local_part default to true when
405 any of the restrictive preconditions are set (to anything). Previously it
406 was only for check_local user. The change removes one item of manual
407 configuration which is required for proper retries when a remote router
408 handles a subset of addresses for a domain.
410 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
411 link count into consideration.
413 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
414 caused the extension of big_buffer, the following lines were ignored.
416 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
417 accordance with RFC 2308. Previously there was no expiry, so a longlived
418 receive process (eg. due to ACL delays) versus a short SOA value could
421 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
423 JH/39 Promote DMARC support to mainline.
425 JH/40 Bug 2452: Add a References: header to DSNs.
427 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
428 parameters. The relevant library call is documented as "Deprecated: This
429 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
430 3.6.0, DH parameters are negotiated following RFC7919."
432 HS/06 Change the default of dnssec_request_domains to "*"
434 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
435 carried on and emitted a BDAT command, even when PIPELINING was not
438 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
439 buffer was used for the filename, resulting in a trap when tainted
440 arguments (eg. $domain) were used.
442 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
443 recommended to avoid a possible server-load attack. The feature can be
444 re-enabled via the openssl_options main cofiguration option.
446 JH/45 local_scan API: documented the current smtp_printf() call. This changed
447 for version 4.90 - adding a "more data" boolean to the arguments.
448 Bumped the ABI version number also, this having been missed previously;
449 release versions 4.90 to 4.92.3 inclusive were effectively broken in
450 respect of usage of smtp_printf() by either local_scan code or libraries
451 accessed via the ${dlfunc } expansion item. Both will need coding
452 adjustment for any calls to smtp_printf() to match the new function
453 signature; a FALSE value for the new argument is always safe.
455 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
456 the file-offset (which the Linux syscall does, and exim expects); this
457 resulted in an indefinite loop.
459 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
460 to do ARC verification. The Authentication-Results: header line added
461 by the configuration then had no ARC item.
467 JH/01 Remove code calling the customisable local_scan function, unless a new
468 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
470 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
471 non-signal-safe functions being used.
473 JH/03 Bug 2269: When presented with a received message having a stupidly large
474 number of DKIM-Signature headers, disable DKIM verification to avoid
475 a resource-consumption attack. The limit is set at twenty.
477 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
478 report of oldest_pass in ${authres } in consequence, and separate out
479 some descriptions of reasons for verification fail.
481 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
482 files in the spool were present and unlocked. A queue-runner could spot
483 them, resulting in a duplicate delivery. Fix that by doing the unlock
484 after the unlink. Investigation by Tim Stewart. Take the opportunity to
485 add more error-checking on spoolfile handling while that code is being
488 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
489 No known attacks, no CVE, this is defensive hardening.
491 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
492 a queue-runner could start a delivery while other operations were ongoing.
493 Cutthrough delivery was a common victim, resulting in duplicate delivery.
494 Found and investigated by Tim Stewart. Fix by using the open message data
495 file handle rather than opening another, and not locally closing it (which
496 releases a lock) for that case, while creating the temporary .eml format
497 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
499 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
500 $sender_verify_failure/$recipient_verify_failure to "random".
502 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
505 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
506 Previously this would segfault.
508 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
511 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
512 like zero, since the resolver should be doing this for us, But we need one
513 as a CNAME but no MX presence gets the CNAME returned; we need to check
514 that doesn't point to an MX to declare it "no MX returned" rather than
515 "error, loop". A new main option is added so the older capability of
516 following some limited number of chain links is maintained.
518 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
520 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
521 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
522 now-deprecated earlier definitions used only specified the range up to TLS
523 1.2 (in the older-version library docs).
525 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
527 JH/15 Rework TLS client-side context management. Stop using a global, and
528 explicitly pass a context around. This enables future use of TLS for
529 connections to service-daemons (eg. malware scanning) while a client smtp
530 connection is using TLS; with cutthrough connections this is quite likely.
532 JH/16 Fix ARC verification to do AS checks in reverse order.
534 JH/17 Support a "tls" option on the ${readsocket } expansion item.
536 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
537 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
538 Previously the "utf8" would be re-prepended for every additional message.
540 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
541 Previously thery were accepted, resulting in issues when attempting to
542 forward messages to a non-supporting MTA.
544 PP/02 Let -n work with printing macros too, not just options.
546 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
547 one parent address was copied, and bogus data was used at delivery-logging
548 time. Either a crash (after delivery) or bogus log data could result.
549 Discovery and analysis by Tim Stewart.
551 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
552 Previously if the string ended mid-character, we did not insert the
553 promised '?' replacement.
555 PP/04 Documentation: current string operators work on bytes, not codepoints.
557 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
558 should pack well giving a smaller memory footprint so better caching and
559 therefore performance. Group the declarations where this can't be done so
560 that the byte-sized flag variables are not interspersed among pointer
561 variables, giving a better chance of good packing by the compiler.
563 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
564 non-null, to avoid issues with sites running BATV. Previously reports were
565 sent with an empty envelope sender so looked like bounces.
567 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
568 The ignore_error flag wasn't being returned from the filter subprocess so
569 was not set for later routers. Investigation and fix by Matthias Kurz.
571 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
572 and a msg:complete for the whole, when a message is manually removed using
573 -Mrm. Developement by Matthias Kurz, hacked on by JH.
575 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
576 a "Gnu special" function, asprintf() in the DB utility binary builds; I
577 hope that is portable enough.
579 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
580 requiring a known-CA anchor certificate; make it now rely entirely on the
581 TLSA as an anchor. Checking the name on the leaf cert against the name
582 on the A-record for the host is still done for TA (but not for EE mode).
584 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
585 included in delivery lines for non-proxied connections, when compiled with
586 SUPPORT_SOCKS and running with proxy logging enabled.
588 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
589 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
590 move the existing event to fire before the normal logging of message
591 failure so that custom logging is bracketed by normal logging.
593 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
594 msg:fail:internal event. Developement by Matthias Kurz.
596 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
597 far too small for todays use of crypto signatures stored there. Go all
598 the way to the max DNS message size of 64kB, even though this might be
599 overmuch for IOT constrained device use.
601 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
602 copy a string over itself. The library routine is documented as not
603 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
605 JH/32 For main options check_spool_space and check_inode_space, where the
606 platform supports 64b integers, support more than the previous 2^31 kB
607 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
608 the previous G, M, k.
610 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
611 $authenticated_fail_id variable on authentication failure. Previously
614 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
615 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
616 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
617 GNUTLS_SEC_PARAM_MEDIUM.
619 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
620 side. Previously we would continue as if no SNI had been received.
622 JH/36 Harden the handling of string-lists. When a list consisted of a sole
623 "<" character, which should be a list-separator specification, we walked
624 off past the nul-terimation.
626 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
627 causes) even when the retry time is not yet met. Previously they were
628 not, meaning that when (say) an account was over-quota and temp-rejecting,
629 and multiple senders' messages were queued, only one sender would get
630 notified on each configured delay_warning cycle.
632 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
634 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
635 cipher-suites, an error can be left on the stack even for a succeeding
636 accept; this results in impossible error messages when a later operation
639 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
640 return error codes indicating retry. Under TLS1.3 this becomes required.
642 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
643 it only wrote the new authenticators, resulting in a lack of tracking of
644 peer changes of ESMTP extensions until the next cache flush.
646 JH/41 Fix the loop reading a message header line to check for integer overflow,
647 and more-often against header_maxsize. Previously a crafted message could
648 induce a crash of the recive process; now the message is cleanly rejected.
650 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
651 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
657 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
658 When redis_servers is set to a list of > 1 element, and the Redis servers
659 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
660 case of MOVED into a DEFER case instead, thus moving the query onto the
661 next server in the list. For a cluster of N elements, all N servers must
662 be defined in redis_servers.
664 GF/02 Catch and remove uninitialized value warning in exiqsumm
665 Check for existence of @ARGV before looking at $ARGV[0]
667 JH/01 Replace the store_release() internal interface with store_newblock(),
668 which internalises the check required to safely use the old one, plus
669 the allocate and data copy operations duplicated in both (!) of the
670 extant use locations.
672 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
673 modifier. This matches the restriction on the commandline.
675 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
676 Previously only the last row was returned.
678 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
679 we assumed that tags in the header were well-formed, and parsed the
680 element content after inspecting only the first char of the tag.
681 Assumptions at that stage could crash the receive process on malformed
684 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
685 While running the DKIM ACL we operate on the Permanent memory pool so that
686 variables created with "set" persist to the DATA ACL. Also (at any time)
687 DNS lookups that fail create cache records using the Permanent pool. But
688 expansions release any allocations made on the current pool - so a dnsdb
689 lookup expansion done in the DKIM ACL releases the memory used for the
690 DNS negative-cache, and bad things result. Solution is to switch to the
691 Main pool for expansions.
692 While we're in that code, add checks on the DNS cache during store_reset,
693 active in the testsuite.
694 Problem spotted, and debugging aided, by Wolfgang Breyha.
696 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
697 When none of the hosts presented to a transport match an already-open
698 connection, close it and proceed with the list. Previously we would
699 queue the message. Spotted by Lena with Yahoo, probably involving
702 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
703 Previously a spurious "250 OK id=" response was appended to the proper
706 JH/08 The "support for" informational output now, which built with Content
707 Scanning support, has a line for the malware scanner interfaces compiled
708 in. Interface can be individually included or not at build time.
710 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
711 by the template makefile "src/EDITME". The "STREAM" support for an older
712 ClamAV interface method is removed.
714 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
715 rows affected is given instead).
717 JH/11 The runtime Berkeley DB library version is now additionally output by
718 "exim -d -bV". Previously only the compile-time version was shown.
720 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
721 SMTP connection. Previously, when one had more receipients than the
722 first, an abortive onward connection was made. Move to full support for
723 multiple onward connections in sequence, handling cutthrough connection
724 for all multi-message initiating connections.
726 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
727 routers. Previously, a multi-recipient message would fail to match the
728 onward-connection opened for the first recipient, and cause its closure.
730 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
731 a timeout on read on a GnuTLS initiating connection, resulting in the
732 initiating connection being dropped. This mattered most when the callout
733 was marked defer_ok. Fix to keep the two timeout-detection methods
736 JH/15 Relax results from ACL control request to enable cutthrough, in
737 unsupported situations, from error to silently (except under debug)
738 ignoring. This covers use with PRDR, frozen messages, queue-only and
741 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
743 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
744 metadata, resulting in a crash in free().
746 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
747 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
748 Broken also in d185889f4, with init system revamp.
750 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
751 Previously we abruptly closed the connection after reading a malware-
752 found indication; now we go on to read the "scan ok" response line,
755 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
756 ACL. Previously, a crash would result.
758 JH/19 Speed up macro lookups during configuration file read, by skipping non-
759 macro text after a replacement (previously it was only once per line) and
760 by skipping builtin macros when searching for an uppercase lead character.
762 JH/20 DANE support moved from Experimental to mainline. The Makefile control
763 for the build is renamed.
765 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
766 was allocated for every new TLS startup, meaning one per message. Fix
767 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
769 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
770 reported the original. Fix to report (as far as possible) the ACL
771 result replacing the original.
773 JH/23 Fix memory leak during multi-message connections using STARTTLS under
774 OpenSSL. Certificate information is loaded for every new TLS startup,
775 and the resources needed to be freed.
777 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
779 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
782 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
783 DATA response info to the (existing) per-recipient response info for
784 the "C=" log element. It can have useful tracking info from the
785 destination system. Patch from Simon Arlott.
787 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
788 length value. Previously this would segfault.
790 HS/02 Support Avast multiline protoocol, this allows passing flags to
791 newer versions of the scanner.
793 JH/28 Ensure that variables possibly set during message acceptance are marked
794 dead before release of memory in the daemon loop. This stops complaints
795 about them when the debug_store option is enabled. Discovered specifically
796 for sender_rate_period, but applies to a whole set of variables.
797 Do the same for the queue-runner and queue-list loops, for variables set
798 from spool message files. Do the same for the SMTP per-message loop, for
799 certain variables indirectly set in ACL operations.
801 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
802 as a multi-recipient message from a mailinglist manager). The coding had
803 an arbitrary cutoff number of characters while checking for more input;
804 enforced by writing a NUL into the buffer. This corrupted long / fast
805 input. The problem was exposed more widely when more pipelineing of SMTP
806 responses was introduced, and one Exim system was feeding another.
807 The symptom is log complaints of SMTP syntax error (NUL chars) on the
808 receiving system, and refused recipients seen by the sending system
809 (propating to people being dropped from mailing lists).
810 Discovered and pinpointed by David Carter.
812 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
813 replaced by the ${authresults } expansion.
815 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
817 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
818 allows proper process termination in container environments.
820 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
821 Previously the "final dot" had a newline after it; ensure it is CR,LF.
823 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
824 and "err_perm", deprecated since 4.83 when the RFC-defined words
825 "temperror" and "permerror" were introduced.
827 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
828 transport-filters or DKIM-signing. The restriction was lost in the
829 consolidation of verify-callout and delivery SMTP handling.
830 Extend the restriction to also cover ARC-signing.
832 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
833 in defer=pass mode supply a 450 to the initiator. Previously the message
836 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
837 tls_require_ciphers is used as before.
839 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
840 "pass_unscanned". Only tmpfails from the scanner are written to
841 the paniclog, as they may require admin intervention (permission
842 denied, license issues). Other scanner errors (like decompression
843 bombs) do not cause a paniclog entry.
845 JH/36 Fix reinitialisation of DKIM logging variable between messages.
846 Previously it was possible to log spurious information in receive log
849 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
850 triggered odd behaviour from Outlook Express clients.
852 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
855 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
856 since the IETF WG has not yet settled on that versus the original
857 "bare" representation.
859 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
860 Previously the millisecond value corrupted the output.
861 Fix also for syslog_pid=no and log_selector +pid, for which the pid
862 corrupted the output.
868 JH/01 Rework error string handling in TLS interface so that the caller in
869 more cases is responsible for logging. This permits library-sourced
870 string to be attached to addresses during delivery, and collapses
871 pairs of long lines into single ones.
873 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
874 during configuration. Wildcards are allowed and expanded.
876 JH/02 Rework error string handling in DKIM to pass more info back to callers.
877 This permits better logging.
879 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
880 do not close it down and have the child transport start it up again on
881 the passed-on TCP connection. Instead, proxy the child (and any
882 subsequent ones) for TLS via a unix-domain socket channel. Logging is
883 affected: the continued delivery log lines do not have any DNSSEC, TLS
884 Certificate or OCSP information. TLS cipher information is still logged.
886 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
887 identical IP addresses on different listening ports. Will also affect
890 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
891 add noisy ifdef guards to special-case this sillyness.
892 Patch from Bernd Kuhls.
894 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
895 than 255 are no longer allowed.
897 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
898 Disable the session-cache too, which might reduce our load. Since we
899 currrectly use a new context for every connection, both as server and
900 client, there is no benefit for these.
901 GnuTLS appears to not support tickets server-side by default (we don't
902 call gnutls_session_ticket_enable_server()) but client side is enabled
903 by default on recent versions (3.1.3 +) unless the PFS priority string
906 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
907 <https://reproducible-builds.org/specs/source-date-epoch/>.
909 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
910 the check for any unsuccessful recipients did not notice the limit, and
911 erroneously found still-pending ones.
913 JH/08 Pipeline CHUNKING command and data together, on kernels that support
914 MSG_MORE. Only in-clear (not on TLS connections).
916 JH/09 Avoid using a temporary file during transport using dkim. Unless a
917 transport-filter is involved we can buffer the headers in memory for
918 creating the signature, and read the spool data file once for the
919 signature and again for transmission.
921 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
922 4.77 as the kernel support then wasn't solid, having issues in 64bit
923 mode. Now, it's been long enough. Add support for FreeBSD also.
925 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
926 case where the routing stage had gathered several addresses to send to
927 a host before calling the transport for the first, we previously failed
928 to close down TLS in the old transport process before passing the TCP
929 connection to the new process. The new one sent a STARTTLS command
930 which naturally failed, giving a failed delivery and bloating the retry
931 database. Investigation and fix prototype from Wolfgang Breyha.
933 JH/12 Fix check on SMTP command input synchronisation. Previously there were
934 false-negatives in the check that the sender had not preempted a response
935 or prompt from Exim (running as a server), due to that code's lack of
936 awareness of the SMTP input buffering.
938 PP/04 Add commandline_checks_require_admin option.
939 Exim drops privileges sanely, various checks such as -be aren't a
940 security problem, as long as you trust local users with access to their
941 own account. When invoked by services which pass untrusted data to
942 Exim, this might be an issue. Set this option in main configuration
943 AND make fixes to the calling application, such as using `--` to stop
946 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
947 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
948 responses to those, into a single TLS record each way (this usually means
949 a single packet). As a side issue, smtp_enforce_sync now works on TLS
952 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
953 affects you only if you're dancing at the edge of the param size limits.
954 If you are, and this message makes sense to you, then: raise the
955 configured limit or use OpenSSL 1.1. Nothing we can do for older
958 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
959 cmdline element to get the documented default one. Previously it was
962 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
963 are unsuable for non-message-specific reasons - eg. connection timeout,
964 banner-time rejection.
966 JH/16 Fix logging of delivery remote port, when specified by router, under
969 PP/06 Repair manualroute's ability to take options in any order, even if one
970 is the name of a transport.
973 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
975 JH/17 Change the list-building routines interface to use the expanding-string
976 triplet model, for better allocation and copying behaviour.
978 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
979 Previously it was constructed the first time a possibly-matching string
980 was met in the configuration file input during startup; now it is done
983 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
984 compatible one, to avoid the (poorly documented) possibility of a config
985 file in the working directory redirecting the DB files, possibly correpting
986 some existing file. CVE-2017-10140 assigned for BDB.
988 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
989 cache-hot. Previously, although the result was properly cached, the
990 initial verify call returned a defer.
992 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
993 the main verify for receipient in uncached-mode.
995 JH/22 Retire historical build files to an "unsupported" subdir. These are
996 defined as "ones for which we have no current evidence of testing".
998 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
999 if present. Previously it was ignored.
1001 JH/24 Start using specified-initialisers in C structure init coding. This is
1002 a C99 feature (it's 2017, so now considered safe).
1004 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1005 if was a fixed-sized field and bitmask ops via macros; it is now more
1008 PP/07 GitHub PR 56: Apply MariaDB build fix.
1009 Patch provided by Jaroslav Škarvada.
1011 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1012 during Coverity cleanups [4.87 JH/47]
1013 Diagnosis and fix provided by Michael Fischer v. Mollard.
1015 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1016 the right size to place the terminating semicolon on its own folded
1017 line, the header hash was calculated to an incorrect value thanks to
1018 the (relaxed) space the fold became.
1020 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1021 and confused the parent.
1023 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1024 which could crash as a result. This could lead to undeliverable messages.
1026 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1029 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1030 matters on fast-turnover and PID-randomising systems, which were getting
1031 out-of-order delivery.
1033 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1034 a possibly-overlapping copy. The symptom was that "Remote host closed
1035 connection in response to HELO" was logged instead of the actual 4xx
1038 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1039 Previously only that bufferd was discarded, resulting in SYMTP command
1042 JH/32 DKIM: when a message has multiple signatures matching an identity given
1043 in dkim_verify_signers, run the dkim acl once for each. Previously only
1044 one run was done. Bug 2189.
1046 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1047 "panic the current process" to "deliberately defer". The panic log is
1048 still written with the problem list name; the mail and reject logs now
1049 get a temp-reject line for the message that was being handled, saying
1050 something like "domains check lookup or other defer". The SMTP 451
1051 message is still "Temporary local problem".
1053 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1054 A crafted sequence of BDAT commands could result in in-use memory beeing
1055 freed. CVE-2017-16943.
1057 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1058 from SMTP input. Previously it was always done; now only done for DATA
1059 and not BDAT commands. CVE-2017-16944.
1061 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1062 to the message (such as an overlong header line). Previously this was
1063 not done and we did not exit BDAT mode. Followon from the previous item
1064 though a different problem.
1070 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1071 than -2003 did; needs libidn2 in addition to libidn.
1073 JH/02 The path option on a pipe transport is now expanded before use.
1075 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1076 Patch provided by "Björn", documentation fix added too.
1078 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1079 missing a wire-to-host endian conversion.
1081 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1082 close after a BDAT command line could be taken as a following command,
1083 giving a synch failure. Fix by only checking for synch immediately
1084 before acknowledging the chunk.
1086 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1087 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1088 macro. Patches provided by Josh Soref.
1090 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1091 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1092 by IANA as a service extension. However, John Klensin suggests that we
1095 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1096 the dkim code may be unix-mode line endings rather than smtp wire-format
1097 CRLF, so prepend a CR to any bare LF.
1099 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1100 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1102 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1103 the first were themselves being wrongly included in the feed into dkim
1104 processing; with most chunk sizes in use this resulted in an incorrect
1105 body hash calculated value.
1107 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1108 DKIM signature block, for verification. Although advised against by
1109 standards it is specifically not ruled illegal.
1111 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1113 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1114 missing a body hash (the bh= tag).
1116 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1117 It seems that HAProxy sends the Proxy Protocol information in clear and
1118 only then does a TLS startup, so do the same.
1120 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1121 TCP connections (such as for Spamd) unless the daemon successfully set
1122 Fast Open mode on its listening sockets. This fixes breakage seen on
1123 too-old kernels or those not configured for Fast Open, at the cost of
1124 requiring both directions being enabled for TFO, and TFO never being used
1125 by non-daemon-related Exim processes.
1127 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1128 endings, at least on the first header line. Try to canonify any that get
1129 past that check, despite the cost.
1131 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1132 now limited to an arbitrary five deep, while parsing addresses with the
1133 strip_excess_angle_brackets option enabled.
1135 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1136 instead leave the unprompted TLS handshake in socket buffer for the
1137 TLS library to consume.
1139 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1141 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1143 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1144 region in one operation, for speed, and this leaves assigned pointers
1145 dangling. Add checks run only under the testsuite which checks all
1146 variables at a store-reset and panics on a dangling pointer; add code
1147 explicitly nulling out all the variables discovered. Fixes one known
1148 bug: a transport crash, where a dangling pointer for $sending_ip_address
1149 originally assigned in a verify callout, is re-used.
1151 PP/06 Drop '.' from @INC in various Perl scripts.
1153 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1155 PP/08 Reduce a number of compilation warnings under clang; building with
1156 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1157 should be warning-free.
1159 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1161 HS/01 Fix portability problems introduced by PP/08 for platforms where
1162 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1164 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1165 chunk. This allows us to accept broken chunked messages. We need a more
1166 general solution here.
1168 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1169 already-broken messages in the queue.
1171 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1173 JH/19 Fix reference counting bug in routing-generated-address tracking.
1179 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1180 supports it and a size is available (ie. the sending peer gave us one).
1182 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1183 years of being deprecated). The replacements are the ACLs
1184 acl_smtp_mime and acl_not_smtp_mime.
1186 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1187 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1188 or even an in-clear connection were permitted. Now, if the host lookup
1189 was dnssec and dane was requested then the host is only used if the
1190 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1191 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1192 if one fails this test.
1193 This means that a poorly-configured remote DNS will make it incommunicado;
1194 but it protects against a DNS-interception attack on it.
1196 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1197 non-noisy when a race steals the message being considered.
1199 JH/05 If main configuration option tls_certificate is unset, generate a
1200 self-signed certificate for inbound TLS connections.
1202 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1203 in rewrites and routers.
1205 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1206 and logged a warning sing 4.83; now they are a configuration file error.
1208 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1209 (lacking @domain). Apply the same qualification processing as RCPT.
1211 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1213 JH/10 Support ${sha256:} applied to a string (as well as the previous
1216 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1217 a cutthrough deliver is pending, as we always want to make a connection.
1218 This also avoids re-routing the message when later placing the cutthrough
1219 connection after a verify cache hit.
1220 Do not update it with the verify result either.
1222 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1223 when routing results in more than one destination address.
1225 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1226 signing (which inhibits the cutthrough capability). Previously only
1227 the presence of an option was tested; now an expansion evaluating as
1228 empty is permissible (obviously it should depend only on data available
1229 when the cutthrough connection is made).
1231 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1232 the relevant preceding SMTP command did not note the pipelining mode.
1234 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1235 Previously they were not counted.
1237 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1238 as one having no matching records. Previously we deferred the message
1239 that needed the lookup.
1241 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1242 distinguished as "(=".
1244 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1245 for missing MX records. Previously it only worked for missing A records.
1247 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1249 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1250 after the data-go-ahead and data-ack. Patch from Jason Betts.
1252 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1253 even for a "none" policy. Patch from Tony Meyer.
1255 JH/22 Fix continued use of a connection for further deliveries. If a port was
1256 specified by a router, it must also match for the delivery to be
1259 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1260 When one of the recipients of a message was unsuitable for the connection
1261 (has no matching addresses), we lost track of needing to mark it
1262 deferred. As a result mail would be lost.
1264 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1266 JH/25 Decoding ACL controls is now done using a binary search; the source code
1267 takes up less space and should be simpler to maintain. Merge the ACL
1268 condition decode tables also, with similar effect.
1270 JH/26 Fix problem with one_time used on a redirect router which returned the
1271 parent address unchanged. A retry would see the parent address marked as
1272 delivered, so not attempt the (identical) child. As a result mail would
1275 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1276 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1277 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1280 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1281 Main config options check_{log,spool}_{inodes,space} are now
1282 100 inodes, 10MB unless set otherwise in the configuration.
1284 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1285 Previously it only applied to the main-section connection policy
1288 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1290 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1291 by me. Added RFC7919 DH primes as an alternative.
1293 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1294 are not in the system include path.
1296 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1297 GnuTLS, when a session startup failed (eg because the client disconnected)
1298 Exim did stdio operations after fclose. This was exposed by a recent
1299 change which nulled out the file handle after the fclose.
1301 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1302 signed directly by the cert-signing cert, rather than an intermediate
1303 OCSP-signing cert. This is the model used by LetsEncrypt.
1305 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1307 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1308 an incoming connection.
1310 HS/02 Bug 1802: Do not half-close the connection after sending a request
1313 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1314 fallback to "prime256v1".
1316 JH/34 SECURITY: Use proper copy of DATA command in error message.
1317 Could leak key material. Remotely exploitable. CVE-2016-9963.
1323 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1324 and 3.4.4 - once the server is enabled to respond to an OCSP request
1325 it does even when not requested, resulting in a stapling non-aware
1326 client dropping the TLS connection.
1328 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1329 support variable-length bit vectors. No functional change.
1331 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1332 The I= interface field on outgoing lines is now after the H= remote
1333 host field, same as incoming lines. There is a separate
1334 outgoing_interface log selector which allows you to disable the
1337 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1338 If not running log_selector +smtp_connection the mainlog would be held
1339 open indefinitely after a "too many connections" event, including to a
1340 deleted file after a log rotate. Leave the per net connection logging
1341 leaving it open for efficiency as that will be quickly detected by the
1342 check on the next write.
1344 HS/01 Bug 1671: Fix post transport crash.
1345 Processing the wait-<transport> messages could crash the delivery
1346 process if the message IDs didn't exist for some reason. When
1347 using 'split_spool_directory=yes' the construction of the spool
1348 file name failed already, exposing the same netto behaviour.
1350 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1351 mime_regex ACL conditions.
1353 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1354 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1355 to HELO, local diagnostic string.
1357 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1358 log line to debug. Even when configured with a tls authenticator many
1359 client connections are expected to not authenticate in this way, so
1360 an authenticate fail is not an error.
1362 HS/02 Add the Exim version string to the process info. This way exiwhat
1363 gives some more detail about the running daemon.
1365 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1366 matter for fast-change records such as DNSBLs.
1368 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1369 retry record, even if constant. There may be multiple transports with
1370 different interface settings and the retry behaviour needs to be kept
1373 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1375 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1377 JH/10 Bug 840: fix log_defer_output option of pipe transport
1379 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1380 hosts_randomize. This matters a lot when combined with mua_wrapper.
1382 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1383 ${quote_pgsql:<string>} operator.
1385 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1387 JH/14 Change header file name for freeradius-client. Relevant if compiling
1388 with Radius support; from the Gentoo tree and checked under Fedora.
1390 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1392 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1393 option transport_filter, meaning no filtering.
1395 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1397 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1398 defaults to "*" (all hosts). The variable is now available when not built
1399 with TLS, default unset, mainly to enable keeping the testsuite sane.
1400 If a server certificate is not supplied (via tls_certificate) an error is
1401 logged, and clients will find TLS connections fail on startup. Presumably
1402 they will retry in-clear.
1403 Packagers of Exim are strongly encouraged to create a server certificate
1404 at installation time.
1406 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1407 with the $config_file variable.
1409 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1410 in transport context, after the attempt, and per-recipient. The latter type
1411 is per host attempted. The event data is the error message, and the errno
1412 information encodes the lookup type (A vs. MX) used for the (first) host,
1413 and the trailing two digits of the smtp 4xx response.
1415 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1416 to write to mainlog (or rejectlog, paniclog) in the window between file
1417 creation and permissions/ownership being changed. Particularly affects
1418 installations where exicyclog is run as root, rather than exim user;
1419 result is that the running daemon panics and dies.
1421 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1423 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1424 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1425 "pri" and "weight". Note that the previous implicit priority given by the
1426 list order is no longer honoured.
1428 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1429 for DKIM processing.
1431 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1432 by defining SUPPORT_SOCKS.
1434 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1435 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1436 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1437 variables are renamed to proxy_{local,external}_{address,port}.
1439 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1440 for a build by defining SUPPORT_I18N
1442 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1443 of the query string, and make ${quote_redis:} do that quoting.
1445 JH/29 Move Events support from Experimental to mainline, enabled by default
1446 and removable for a build by defining DISABLE_EVENT.
1448 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1450 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1451 cached by the daemon.
1453 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1454 by defining LOOKUP_REDIS. The libhiredis library is required.
1456 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1457 keys are given for lookup.
1459 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1460 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1461 only supported when built with TLS support. The PolarSSL SHA routines
1462 are still used when the TLS library is too old for convenient support.
1464 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1465 openssl_options), for security. OpenSSL forces this from version 1.1.0
1466 server-side so match that on older versions.
1468 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1469 allocation for $value could be released as the expansion processing
1470 concluded, but leaving the global pointer active for it.
1472 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1473 and to use the domains and local_parts ACL conditions.
1475 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1476 incorrectly not doubled on cutthrough transmission, hence seen as a
1477 body-termination at the receiving system - resulting in truncated mails.
1478 Commonly the sender saw a TCP-level error, and retransmitted the message
1479 via the normal store-and-forward channel. This could result in duplicates
1480 received - but deduplicating mailstores were liable to retain only the
1481 initial truncated version.
1483 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1485 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1487 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1488 we're in there, support oversigning also; bug 1309.
1490 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1492 HS/04 Add support for keep_environment and add_environment options.
1494 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1495 either intentional arithmetic overflow during PRNG, or testing config-
1498 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1499 delivery resulted in actual delivery. Cancel cutthrough before DATA
1502 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1503 rejects a recipient: pass the reject to the originator.
1505 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1506 Many were false-positives and ignorable, but it's worth fixing the
1509 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1510 for the new environment-manipulation done at startup. Move the routines
1511 from being local to tls.c to being global via the os.c file.
1513 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1514 an extract embedded as result-arg for a map, the first arg for extract
1515 is unavailable so we cannot tell if this is a numbered or keyed
1516 extraction. Accept either.
1522 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1525 JH/02 The smtp transport option "multi_domain" is now expanded.
1527 JH/03 The smtp transport now requests PRDR by default, if the server offers
1530 JH/04 Certificate name checking on server certificates, when exim is a client,
1531 is now done by default. The transport option tls_verify_cert_hostnames
1532 can be used to disable this per-host. The build option
1533 EXPERIMENTAL_CERTNAMES is withdrawn.
1535 JH/05 The value of the tls_verify_certificates smtp transport and main options
1536 default to the word "system" to access the system default CA bundle.
1537 For GnuTLS, only version 3.0.20 or later.
1539 JH/06 Verification of the server certificate for a TLS connection is now tried
1540 (but not required) by default. The verification status is now logged by
1541 default, for both outbound TLS and client-certificate supplying inbound
1544 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1547 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1548 Status Notification (bounce) messages are now MIME format per RFC 3464.
1549 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1550 under the control of the dsn_advertise_hosts option, and routers may
1551 have a dsn_lasthop option.
1553 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1554 default, modifiable by a malware= option. The list separator for
1555 the options can now be changed in the usual way. Bug 68.
1557 JH/10 The smtp_receive_timeout main option is now expanded before use.
1559 JH/11 The incoming_interface log option now also enables logging of the
1560 local interface on delivery outgoing connections.
1562 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1563 if the interface and destination host and port all match.
1565 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1568 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1569 Patch from Andrew Lewis.
1571 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1572 now supports optional time-restrictions, weighting, and priority
1573 modifiers per server. Patch originally by <rommer@active.by>.
1575 JH/16 The spamd_address main option now supports a mixed list of local
1576 and remote servers. Remote servers can be IPv6 addresses, and
1577 specify a port-range.
1579 JH/17 Bug 68: The spamd_address main option now supports an optional
1580 timeout value per server.
1582 JH/18 Bug 1581: Router and transport options headers_add/remove can
1583 now have the list separator specified.
1585 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1588 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1591 JH/21 Support for the A6 type of dns record is withdrawn.
1593 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1594 rather than the verbs used.
1596 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1597 from 255 to 1024 chars.
1599 JH/24 Verification callouts now attempt to use TLS by default.
1601 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1602 are generic router options now. The defaults didn't change.
1604 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1605 Original patch from Alexander Shikoff, worked over by JH.
1607 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1608 files if ZCAT_COMMAND is not executable.
1610 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1612 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1614 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1615 Normally benign, it bites when the pair was led to by a CNAME;
1616 modern usage is to not canonicalize the domain to a CNAME target
1617 (and we were inconsistent anyway for A-only vs AAAA+A).
1619 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1621 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1622 when evaluating $sender_host_dnssec.
1624 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1625 $sender_helo_dnssec variable.
1627 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1629 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1631 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1633 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1634 documented as working, but never had. Support all but $spam_report.
1636 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1637 added for tls authenticator.
1639 HS/03 Add perl_taintmode main config option
1645 TL/01 When running the test suite, the README says that variables such as
1646 no_msglog_check are global and can be placed anywhere in a specific
1647 test's script, however it was observed that placement needed to be near
1648 the beginning for it to behave that way. Changed the runtest perl
1649 script to read through the entire script once to detect and set these
1650 variables, reset to the beginning of the script, and then run through
1651 the script parsing/test process like normal.
1653 TL/02 The BSD's have an arc4random API. One of the functions to induce
1654 adding randomness was arc4random_stir(), but it has been removed in
1655 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1656 function when detected.
1658 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1659 cause callback expansion.
1661 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1662 syntax errors in an expansion can be treated as a string instead of
1663 logging or causing an error, due to the internal use of bool_lax
1664 instead of bool when processing it.
1666 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1667 server certificates when making smtp deliveries.
1669 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1671 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1673 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1675 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1676 Merged patch from Sebastian Wiedenroth.
1678 JH/05 Fix results-pipe from transport process. Several recipients, combined
1679 with certificate use, exposed issues where response data items split
1680 over buffer boundaries were not parsed properly. This eventually
1681 resulted in duplicates being sent. This issue only became common enough
1682 to notice due to the introduction of connection certificate information,
1683 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1685 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1686 size buffer was used, resulting in syntax errors when an expansion
1689 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1690 version 3.3.6 or later.
1692 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1693 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1694 both become "event_action", the variables become $event_name, $event_data
1695 and $event_defer_errno. There is a new variable $verify_mode, usable in
1696 routers, transports and related events. The tls:cert event is now also
1697 raised for inbound connections, if the main configuration event_action
1700 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1701 early OCSP support, but no stapling (appears to be less than 1.0.0).
1703 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1704 server certificate names available under the smtp transport option
1705 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1708 JH/10 Time-related extraction expansions from certificates now use the main
1709 option "timezone" setting for output formatting, and are consistent
1710 between OpenSSL and GnuTLS compilations. Bug 1541.
1712 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1713 encoded parameter in the incoming message. Bug 1558.
1715 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1716 include certificate info, eximon was claiming there were spoolfile
1719 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1721 JH/14 Log delivery-related information more consistently, using the sequence
1722 "H=<name> [<ip>]" wherever possible.
1724 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1725 are problematic for Debian distribution, omit them from the release
1728 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1730 JH/16 Fix string representation of time values on 64bit time_t architectures.
1733 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1734 output list separator was used.
1739 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1740 checkers that were complaining about end of non-void function with no
1743 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1744 This was a regression introduced in 4.83 by another bugfix.
1746 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1748 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1749 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1755 TF/01 Correctly close the server side of TLS when forking for delivery.
1757 When a message was received over SMTP with TLS, Exim failed to clear up
1758 the incoming connection properly after forking off the child process to
1759 deliver the message. In some situations the subsequent outgoing
1760 delivery connection happened to have the same fd number as the incoming
1761 connection previously had. Exim would try to use TLS and fail, logging
1762 a "Bad file descriptor" error.
1764 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1765 utilities have not been installed.
1767 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1768 temporary space as the ACL may create new global variables.
1770 TL/01 LDAP support uses per connection or global context settings, depending
1771 upon the detected version of the libraries at build time.
1773 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1774 to extract and use the src ip:port in logging and expansions as if it
1775 were a direct connection from the outside internet. PPv2 support was
1776 updated based on HAProxy spec change in May 2014.
1778 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1780 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1781 Properly escape header and check for NULL return.
1783 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1786 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1788 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1789 characters in header names, implemented as a verify condition.
1790 Contributed by Michael Fischer v. Mollard.
1792 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1793 results permerror and temperror. Previous values are deprecated but
1794 still accepted. In a future release, err_perm and err_temp will be
1795 completely removed, which will be a backward incompatibility if the
1796 ACL tests for either of these two old results. Patch contributed by
1797 user bes-internal on the mailing list.
1799 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1801 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1802 selectors, in both main and reject logs.
1804 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1807 JH/07 Add malware type "sock" for talking to simple daemon.
1809 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1811 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1812 routers/transports under cutthrough routing.
1814 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1815 numbers. Touch up "bool" conditional to keep the same definition.
1817 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1819 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1821 JH/12 Expand items in router/transport headers_add or headers_remove lists
1822 individually rather than the list as a whole. Bug 1452.
1824 Required for reasonable handling of multiple headers_ options when
1825 they may be empty; requires that headers_remove items with embedded
1826 colons must have them doubled (or the list-separator changed).
1828 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1829 view the policy declared in the DMARC record. Currently, $dmarc_status
1830 is a combined value of both the record presence and the result of the
1833 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1835 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1836 dnslookup router and the smtp transport (applying to the forward
1839 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1840 of ldap servers used for a specific lookup. Patch provided by Heiko
1843 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1844 New variable $lookup_dnssec_authenticated for observability.
1846 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1847 Patch submitted by Lars Timman.
1849 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1851 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1852 Requires trusted mode and valid format message id, aborts otherwise.
1853 Patch contributed by Heiko Schlichting.
1855 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1856 certextract with support for various fields. Bug 1358.
1858 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1859 is requested by default, modifiable by smtp transport option
1862 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1863 operate on certificate variables to give certificate fingerprints
1864 Also new ${sha256:cert_variable}.
1866 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1868 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1869 Christian Aistleitner.
1871 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1873 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1874 file. Patch from Wolfgang Breyha.
1876 JH/25 Expand the coverage of the delivery $host and $host_address to
1877 client authenticators run in verify callout. Bug 1476.
1879 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1880 align with daemon_smtp_ports. Bug 72.
1882 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1883 support and error reporting did not work properly.
1885 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1886 and is readable. Patch from Andrew Colin Kissa.
1888 TL/14 Enhance documentation of ${run expansion and how it parses the
1889 commandline after expansion, particularly in the case when an
1890 unquoted variable expansion results in an empty value.
1892 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1894 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1895 by renaming away from it. Addresses GH issue 15, reported by
1898 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1900 TL/15 SECURITY: prevent double expansion in math comparison functions
1901 (can expand unsanitized data). Not remotely exploitable.
1908 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1910 PP/02 Make -n do something, by making it not do something.
1911 When combined with -bP, the name of an option is not output.
1913 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1916 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1917 $sender_host_name and config options to manage this, and basic check
1920 PP/05 DSCP support for outbound connections and control modifier for inbound.
1922 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1923 (Only plugin which currently uses this is kerberos4, which nobody should
1924 be using, but we should make it available and other future plugins might
1925 conceivably use it, even though it would break NAT; stuff *should* be
1926 using channel bindings instead).
1928 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1929 name; added for Sendmail compatibility; requires admin caller.
1930 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1931 just ignore it); requires trusted caller.
1932 Also parse but ignore: -Ac -Am -X<logfile>
1935 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1937 TL/02 Add +smtp_confirmation as a default logging option.
1939 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1940 Patch by Magnus Holmgren from 2007-02-20.
1942 TL/04 Bugzilla 1281 - Spec typo.
1943 Bugzilla 1283 - Spec typo.
1944 Bugzilla 1290 - Spec grammar fixes.
1946 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1948 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1950 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1951 mailing list by by Dmitry Isaikin.
1953 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1955 JH/02 Support "G" suffix to numbers in ${if comparisons.
1957 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1959 NM/01 Bugzilla 1197 - Spec typo
1960 Bugzilla 1196 - Spec examples corrections
1962 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1964 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1965 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1968 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1969 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1971 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1972 "acl {{name}{arg}...}", and optional args on acl condition
1975 JH/05 Permit multiple router/transport headers_add/remove lines.
1977 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1979 JH/07 Avoid using a waiting database for a single-message-only transport.
1980 Performance patch from Paul Fisher. Bugzilla 1262.
1982 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1985 JH/09 Add $headers_added variable, with content from use of ACL modifier
1986 add_header (but not yet added to the message). Bugzilla 199.
1988 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1989 Pulled from Bugzilla 817 by Wolfgang Breyha.
1991 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1993 (nb: this is the same fix as in Exim 4.80.1)
1995 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1998 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2001 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2003 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2004 advertise SMTP AUTH mechanism to us, instead of a generic
2005 protocol violation error. Also, make Exim more robust to bad
2006 data from the Dovecot auth socket.
2008 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2010 When a queue runner is handling a message, Exim first routes the
2011 recipient addresses, during which it prunes them based on the retry
2012 hints database. After that it attempts to deliver the message to
2013 any remaining recipients. It then updates the hints database using
2016 So if a recipient address works intermittently, it can get repeatedly
2017 deferred at routing time. The retry hints record remains fresh so the
2018 address never reaches the final cutoff time.
2020 This is a fairly common occurrence when a user is bumping up against
2021 their storage quota. Exim had some logic in its local delivery code
2022 to deal with this. However it did not apply to per-recipient defers
2023 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2025 This change adds a proper retry rule check during routing so that the
2026 final cutoff time is checked against the message's age. We only do
2027 this check if there is an address retry record and there is not a
2028 domain retry record; this implies that previous attempts to handle
2029 the address had the retry_use_local_parts option turned on. We use
2030 this as an approximation for the destination being like a local
2031 delivery, as in LMTP.
2033 I suspect this new check makes the old local delivery cutoff check
2034 redundant, but I have not verified this so I left the code in place.
2036 TF/02 Correct gecos expansion when From: is a prefix of the username.
2038 Test 0254 submits a message to Exim with the header
2042 When I ran the test suite under the user fanf2, Exim expanded
2043 the header to contain my full name, whereas it should have added
2044 a Resent-Sender: header. It erroneously treats any prefix of the
2045 username as equal to the username.
2047 This change corrects that bug.
2049 GF/01 DCC debug and logging tidyup
2050 Error conditions log to paniclog rather than rejectlog.
2051 Debug lines prefixed by "DCC: " to remove any ambiguity.
2053 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2055 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2056 Bug spotted by Jeremy Harris; was flawed since initial commit.
2057 Would have resulted in OCSP responses post-SNI triggering an Exim
2058 NULL dereference and crash.
2060 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2062 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2063 Bug detection, analysis and fix by Samuel Thibault.
2064 Bugzilla 1331, Debian bug #698092.
2066 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2068 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2069 Server implementation by Todd Lyons, client by JH.
2070 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2071 config variable "prdr_enable" controls whether the server
2072 advertises the facility. If the client requests PRDR a new
2073 acl_data_smtp_prdr ACL is called once for each recipient, after
2074 the body content is received and before the acl_smtp_data ACL.
2075 The client is controlled by both of: a hosts_try_prdr option
2076 on the smtp transport, and the server advertisement.
2077 Default client logging of deliveries and rejections involving
2078 PRDR are flagged with the string "PRDR".
2080 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2081 fclose(). Diagnosis by Todd Lyons.
2083 PP/17 Update configure.default to handle IPv6 localhost better.
2084 Patch by Alain Williams (plus minor tweaks).
2087 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2088 This is now consistent with GnuTLS, and is now documented: the
2089 previous undocumented portable approach to treating the option as
2090 unset was to force an expansion failure. That still works, and
2091 an empty string is now equivalent.
2093 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2094 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2095 not performing validation itself.
2097 PP/20 Added force_command boolean option to pipe transport.
2098 Patch from Nick Koston, of cPanel Inc.
2100 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2103 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2105 PP/21 Fix eximon continuous updating with timestamped log-files.
2106 Broken in a format-string cleanup in 4.80, missed when I repaired the
2107 other false fix of the same issue.
2108 Report and fix from Heiko Schlichting.
2111 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2112 Report from Prashanth Katuri.
2114 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2115 It's SecureTransport, so affects any MacOS clients which use the
2116 system-integrated TLS libraries, including email clients.
2118 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2119 using a MIME ACL for non-SMTP local injection.
2120 Report and assistance in diagnosis by Warren Baker.
2122 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2124 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2126 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2127 last id that failed so it may be referenced in subsequent ACL's.
2129 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2132 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2133 ldap library initialization, allowing self-signed CA's to be
2134 used. Also properly sets require_cert option later in code by
2135 using NULL (global ldap config) instead of ldap handle (per
2136 session). Bug diagnosis and testing by alxgomz.
2138 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2139 the src/util/ subdirectory.
2141 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2142 renamed to Transport Post Delivery Action by Jeremy Harris, as
2145 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2146 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2147 redis_servers = needs to be configured which will be used by the redis
2148 lookup. Patch from Warren Baker, of The Packet Hub.
2150 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2152 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2153 hostname or reverse DNS when processing a host list. Used suggestions
2154 from multiple comments on this bug.
2156 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2158 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2159 Missed a few lines, added it to make the runtest require no keyboard
2162 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2163 contains upper case chars. Make router use caseful_local_part.
2165 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2166 support when GnuTLS has been built with p11-kit.
2172 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2174 This, or similar/improved, will also be change PP/11 of 4.82.
2180 PP/01 Handle short writes when writing local log-files.
2181 In practice, only affects FreeBSD (8 onwards).
2182 Bugzilla 1053, with thanks to Dmitry Isaikin.
2184 NM/01 Bugzilla 949 - Documentation tweak
2186 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2189 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2191 PP/02 Implemented gsasl authenticator.
2193 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2195 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2196 `pkg-config foo` for cflags/libs.
2198 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2199 with rest of GSASL and with heimdal_gssapi.
2201 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2202 `pkg-config foo` for cflags/libs for the TLS implementation.
2204 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2205 properties get this fed in as external SSF. A number of robustness
2206 and debugging improvements to the cyrus_sasl authenticator.
2208 PP/08 cyrus_sasl server now expands the server_realm option.
2210 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2211 Patch by Jeremy Harris.
2213 PP/10 Added dbmjz lookup type.
2215 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2217 PP/12 MAIL args handles TAB as well as SP, for better interop with
2218 non-compliant senders.
2219 Analysis and variant patch by Todd Lyons.
2221 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2222 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2223 Patch from Dirk Mueller <dmueller@suse.com>
2225 PP/13 tls_peerdn now print-escaped for spool files.
2226 Observed some $tls_peerdn in wild which contained \n, which resulted
2227 in spool file corruption.
2229 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2230 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2231 or write after TLS renegotiation, which otherwise led to messages
2234 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2235 as a tracking header (ie: a signed header comes before the signature).
2236 Patch from Wolfgang Breyha.
2238 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2239 comma-sep list; embedded commas doubled.
2241 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2243 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2245 Report and patch from Dmitry Banschikov.
2247 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2248 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2249 failures. We appear to now support TLS1.1+ with Exim.
2251 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2252 lets Exim select keys and certificates based upon TLS SNI from client.
2253 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2254 before an outbound SMTP session. New log_selector, +tls_sni.
2256 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2257 NULL dereference. Report and patch from Alun Jones.
2259 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2260 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2261 Not seeing resolver debug output on NetBSD, but suspect this is a
2262 resolver implementation change.
2264 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2265 Left warnings. Added "eximon gdb" invocation mode.
2267 PP/21 Defaulting "accept_8bitmime" to true, not false.
2269 PP/22 Added -bw for inetd wait mode support.
2271 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2272 locate the relevant includes and libraries. Made this the default.
2274 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2275 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2277 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2278 This may cause build issues on older platforms.
2280 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2281 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2282 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2283 Added SNI support via GnuTLS too.
2284 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2286 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2288 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2289 Applied second patch from Janne, implementing suggestion to default
2290 multiple-strings-in-record handling to match SPF spec.
2292 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2294 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2295 read-only, out of scope).
2296 Patch from Wolfgang Breyha, report from Stuart Northfield.
2298 PP/29 Fix three issues highlighted by clang analyser static analysis.
2299 Only crash-plausible issue would require the Cambridge-specific
2300 iplookup router and a misconfiguration.
2301 Report from Marcin Mirosław.
2303 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2305 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2306 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2307 As part of this, removing so much warning spew let me fix some minor
2308 real issues in debug logging.
2310 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2311 assignment on my part. Fixed.
2313 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2314 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2315 Janne Snabb (who went above and beyond: thank you).
2317 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2318 string otherwise requires a connection and a bunch more work and it's
2319 relatively easy to get wrong. Should also expose TLS library linkage
2322 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2323 64-bit ${eval} (JH/03).
2325 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2326 GNU libc to support some of the 64-bit stuff, should not lead to
2327 conflicts. Defined before os.h is pulled in, so if a given platform
2328 needs to override this, it can.
2330 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2331 protection layer was required, which is not implemented.
2332 Bugzilla 1254, patch from Wolfgang Breyha.
2334 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2335 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2336 tls_dhparam take prime identifiers. Also unbreak combination of
2337 OpenSSL+DH_params+TLSSNI.
2339 PP/39 Disable SSLv2 by default in OpenSSL support.
2345 PP/01 Solaris build fix for Oracle's LDAP libraries.
2346 Bugzilla 1109, patch from Stephen Usher.
2348 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2350 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2353 TF/02 Fix a couple more cases where we did not log the error message
2354 when unlink() failed. See also change 4.74-TF/03.
2356 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2357 lock up or crash if it happened to be inside a call to libc when it
2358 got a SIGUSR1 from exiwhat.
2360 The SIGUSR1 handler appends the current process status to the process
2361 log which is later printed by exiwhat. It used to use the general
2362 purpose logging code to do this, but several functions it calls are
2363 not safe for signals.
2365 The new output code in the SIGUSR1 handler is specific to the process
2366 log, and simple enough that it's easy to inspect for signal safety.
2367 Removing some special cases also simplifies the general logging code.
2368 Removing the spurious timestamps from the process log simplifies
2371 TF/04 Improved ratelimit ACL condition.
2373 The /noupdate option has been deprecated in favour of /readonly which
2374 has clearer semantics. The /leaky, /strict, and /readonly update modes
2375 are mutually exclusive. The update mode is no longer included in the
2376 database key; it just determines when the database is updated. (This
2377 means that when you upgrade Exim will forget old rate measurements.)
2379 Exim now checks that the per_* options are used with an update mode that
2380 makes sense for the current ACL. For example, when Exim is processing a
2381 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2382 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2383 must specify per_mail/readonly. If you omit the update mode it defaults to
2384 /leaky where that makes sense (as before) or /readonly where required.
2386 The /noupdate option is now undocumented but still supported for
2387 backwards compatibility. It is equivalent to /readonly except that in
2388 ACLs where /readonly is required you may specify /leaky/noupdate or
2389 /strict/noupdate which are treated the same as /readonly.
2391 A useful new feature is the /count= option. This is a generalization
2392 of the per_byte option, so that you can measure the throughput of other
2393 aggregate values. For example, the per_byte option is now equivalent
2394 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2396 The per_rcpt option has been generalized using the /count= mechanism
2397 (though it's more complicated than the per_byte equivalence). When it is
2398 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2399 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2400 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2401 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2402 Note that using per_rcpt with a non-readonly update mode in more than
2403 one ACL will cause the recipients to be double-counted. (The per_mail
2404 and per_byte options don't have this problem.)
2406 The handling of very low rates has changed slightly. If the computed rate
2407 is less than the event's count (usually one) then this event is the first
2408 after a long gap. In this case the rate is set to the same as this event's
2409 count, so that the first message of a spam run is counted properly.
2411 The major new feature is a mechanism for counting the rate of unique
2412 events. The new per_addr option counts the number of different
2413 recipients that someone has sent messages to in the last time period. It
2414 behaves like per_rcpt if all the recipient addresses are different, but
2415 duplicate recipient addresses do not increase the measured rate. Like
2416 the /count= option this is a general mechanism, so the per_addr option
2417 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2418 example, measure the rate that a client uses different sender addresses
2419 with the options per_mail/unique=$sender_address. There are further
2420 details in the main documentation.
2422 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2424 TF/06 Removed a few PCRE remnants.
2426 TF/07 Automatically extract Exim's version number from tags in the git
2427 repository when doing development or release builds.
2429 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2430 Bugzilla 879. Patch from Paul Fisher.
2432 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2433 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2436 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2438 PP/05 Variable $av_failed, true if the AV scanner deferred.
2439 Bugzilla 1078. Patch from John Horne.
2441 PP/06 Stop make process more reliably on build failure.
2442 Bugzilla 1087. Patch from Heiko Schlittermann.
2444 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2445 Bugzilla 1089. Patch from Heiko Schlittermann.
2447 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2448 Bugzilla 1131. Patch from Holger Weiß.
2450 PP/09 Handle IPv6 addresses with SPF.
2451 Bugzilla 860. Patch from Wolfgang Breyha.
2453 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2455 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2458 PP/11 match_* no longer expand right-hand-side by default.
2459 New compile-time build option, EXPAND_LISTMATCH_RHS.
2460 New expansion conditions, "inlist", "inlisti".
2462 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2464 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2466 PP/14 fix log_write() format string regression from TF/03.
2467 Bugzilla 1152. Patch from Dmitry Isaikin.
2473 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2475 PP/02 Harmonised TLS library version reporting; only show if debugging.
2476 Layout now matches that introduced for other libraries in 4.74 PP/03.
2478 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2480 PP/04 New "dns_use_edns0" global option.
2482 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2485 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2486 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2488 TK/01 Updated PolarSSL code to 0.14.2.
2489 Bugzilla 1097. Patch from Andreas Metzler.
2491 PP/07 Catch divide-by-zero in ${eval:...}.
2492 Fixes bugzilla 1102.
2494 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2497 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2498 format-string attack -- SECURITY: remote arbitrary code execution.
2500 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2501 time unintentionally subject to list matching rules, letting the header
2502 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2503 arbitrary string expansion). This allowed for information disclosure.
2505 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2506 INT_MIN/-1 -- value coerced to INT_MAX.
2512 NM/01 Workaround for PCRE version dependency in version reporting
2515 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2516 This fixes portability to compilers other than gcc, notably
2517 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2519 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2520 makefiles for portability to HP-UX and POSIX correctness.
2522 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2523 Also via indented variable definition in the Makefile.
2524 (Debugging by Oliver Heesakkers).
2526 PP/02 Restore caching of spamd results with expanded spamd_address.
2527 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2529 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2530 Improves build reliability. Fix from: Frank Elsner
2532 NM/02 Fix wide character breakage in the rfc2047 coding
2533 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2535 NM/03 Allow underscore in dnslist lookups
2536 Fixes bug 1026. Patch from Graeme Fowler
2538 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2539 Code patches from Adam Ciarcinski of NetBSD.
2541 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2544 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2545 is logged, to avoid truncation. Patch from John Horne.
2547 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2548 Patch from Jakob Hirsch.
2550 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2551 SQL string expansion failure details.
2552 Patch from Andrey Oktyabrski.
2554 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2555 Patch from Simon Arlott.
2557 PP/09 New lookups functionality failed to compile on old gcc which rejects
2558 extern declarations in function scope.
2559 Patch from Oliver Fleischmann
2561 PP/10 Use sig_atomic_t for flags set from signal handlers.
2562 Check getgroups() return and improve debugging.
2563 Fixed developed for diagnosis in bug 927 (which turned out to be
2566 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2567 Patch from Mark Zealey.
2569 PP/12 Bugzilla 1056: Improved spamd server selection.
2570 Patch from Mark Zealey.
2572 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2573 Based on patch from Heiko Schlittermann.
2575 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2576 Patch from Uwe Doering, sign-off by Michael Haardt.
2578 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2579 variable declaration deep within a block. Bug and patch from
2582 PP/15 lookups-Makefile IRIX compatibility coercion.
2584 PP/16 Make DISABLE_DKIM build knob functional.
2586 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2587 Patch by Simon Arlott
2589 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2590 variable argument macros. Our copy now differs from upstream.
2596 TF/01 Failure to get a lock on a hints database can have serious
2597 consequences so log it to the panic log.
2599 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2600 controlled using the smtp_confirmation log selector.
2602 TF/03 Include the error message when we fail to unlink a spool file.
2604 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2605 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2606 for maintaining out-of-tree patches for some time.
2608 PP/01 Bugzilla 139: Documentation and portability issues.
2609 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2610 Handle per-OS dynamic-module compilation flags.
2612 PP/02 Let /dev/null have normal permissions.
2613 The 4.73 fixes were a little too stringent and complained about the
2614 permissions on /dev/null. Exempt it from some checks.
2615 Reported by Andreas M. Kirchwitz.
2617 PP/03 Report version information for many libraries, including
2618 Exim version information for dynamically loaded libraries. Created
2619 version.h, now support a version extension string for distributors
2620 who patch heavily. Dynamic module ABI change.
2622 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2623 privilege escalation vulnerability whereby the Exim run-time user
2624 can cause root to append content of the attacker's choosing to
2627 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2630 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2631 If dropping privileges for untrusted macros, we disabled normal logging
2632 on the basis that it would fail; for the Exim run-time user, this is not
2633 the case, and it resulted in successful deliveries going unlogged.
2634 Fixed. Reported by Andreas Metzler.
2640 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2641 only prepend for the Resent-* case. Fixes regression introduced in
2642 Exim 4.70 by NM/22 for Bugzilla 607.
2644 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2645 increasing numbers of administrators be bitten by this.
2647 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2649 PP/03 Bugzilla 994: added openssl_options main configuration option.
2651 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2653 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2655 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2657 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2658 without a peer certificate, leading to a segfault because of an
2659 assumption that peers always have certificates. Be a little more
2660 paranoid. Problem reported by Martin Tscholak.
2662 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2663 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2664 NB: ClamAV planning to remove STREAM in "middle of 2010".
2665 CL also introduces -bmalware, various -d+acl logging additions and
2666 more caution in buffer sizes.
2668 PP/09 Implemented reverse_ip expansion operator.
2670 PP/10 Bugzilla 937: provide a "debug" ACL control.
2672 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2674 PP/12 Bugzilla 973: Implement --version.
2676 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2678 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2680 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2682 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2683 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2684 ignore trailing whitespace.
2686 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2688 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2691 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2692 Notification from Dr Andrew Aitchison.
2694 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2695 ExtendedDetectionInfo response format.
2696 Notification from John Horne.
2698 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2701 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2702 XSL and documented dependency on system catalogs, with examples of how
2705 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2708 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2709 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2710 configuration file which is writeable by the Exim user or group.
2712 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2713 of configuration files to cover files specified with the -C option if
2714 they are going to be used with root privileges, not just the default
2717 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2718 option (effectively making it always true).
2720 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2721 files to be used while preserving root privileges.
2723 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2724 that rogue child processes cannot use them.
2726 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2727 run-time user, instead of root.
2729 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2730 Exim run-time user without dropping privileges.
2732 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2733 result string, instead of calling string_vformat() twice with the same
2736 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2737 for other users. Others should always drop root privileges if they use
2738 -C on the command line, even for a whitelisted configure file.
2740 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2742 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2748 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2749 $data_path, and $header_path variables; fixed documentation bugs and
2752 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2753 exipick to access non-standard spools, including the "frozen" queue
2756 NM/01 Bugzilla 965: Support mysql stored procedures.
2757 Patch from Alain Williams
2759 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2761 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2762 Patch from Andreas Metzler
2764 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2765 Patch from Kirill Miazine
2767 NM/05 Bugzilla 671: Added umask to procmail example.
2769 JJ/03 installed exipick 20100323.0, fixing doc bug
2771 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2772 directory. Notification and patch from Dan Rosenberg.
2774 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2776 TK/02 Improve log output when DKIM signing operation fails.
2778 MH/01 Treat the transport option dkim_domain as a colon separated
2779 list, not as a single string, and sign the message with each element,
2780 omitting multiple occurences of the same signer.
2782 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2783 Bugzilla 985, 986. Patch by Simon Arlott
2785 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2786 Patch by Simon Arlott
2788 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2789 MBX locking. Notification from Dan Rosenberg.
2795 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2797 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2799 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2801 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2803 NM/04 Bugzilla 915: Flag broken perl installation during build.
2809 TK/01 Added patch by Johannes Berg that expands the main option
2810 "spamd_address" if it starts with a dollar sign.
2812 TK/02 Write list of recipients to X-Envelope-Sender header when building
2813 the mbox-format spool file for content scanning (suggested by Jakob
2816 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2817 (http://www.dcc-servers.net/) support via dccifd. Activated by
2818 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2820 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2821 by Mark Daniel Reidel <mr@df.eu>.
2823 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2824 When building exim an external PCRE library is now needed -
2825 PCRE is a system library on the majority of modern systems.
2826 See entry on PCRE_LIBS in EDITME file.
2828 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2829 conversation. Added nologin parameter to request.
2830 Patch contributed by Kirill Miazine.
2832 TF/01 Do not log submission mode rewrites if they do not change the address.
2834 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2836 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2837 log files in place. Contributed by Roberto Lima.
2839 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2841 TF/03 Bugzilla 615: When checking the local_parts router precondition
2842 after a local_part_suffix or local_part_prefix option, Exim now
2843 does not use the address's named list lookup cache, since this
2844 contains cached lookups for the whole local part.
2846 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2847 Robert Millan. Documentation is in experimental-spec.txt.
2849 TF/04 Bugzilla 668: Fix parallel build (make -j).
2851 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2853 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2854 Patch provided by Jan Srzednicki.
2856 TF/05 Leading white space used to be stripped from $spam_report which
2857 wrecked the formatting. Now it is preserved.
2859 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2860 that they are available at delivery time.
2862 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2864 TF/08 TLS error reporting now respects the incoming_interface and
2865 incoming_port log selectors.
2867 TF/09 Produce a more useful error message if an SMTP transport's hosts
2868 setting expands to an empty string.
2870 NM/06 Bugzilla 744: EXPN did not work under TLS.
2871 Patch provided by Phil Pennock.
2873 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2874 Patch provided by Richard Godbee.
2876 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2877 acl_smtp_notquit, added index entry.
2879 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2880 Patch provided by Eugene Bujak.
2882 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2883 accept(). Patch provided by Maxim Dounin.
2885 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2886 Patch provided by Phil Pennock.
2888 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2890 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2891 Patch provided by Brad "anomie" Jorsch.
2893 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2894 Patch provided by Dean Brooks.
2896 TK/05 Add native DKIM support (does not depend on external libraries).
2898 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2899 Patch provided by Graeme Fowler.
2901 NM/16 Bugzilla 851: Documentation example syntax fix.
2903 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2905 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2908 NM/19 Bugzilla 745: TLS version reporting.
2909 Patch provided by Phil Pennock.
2911 NM/20 Bugzilla 167: bool: condition support.
2912 Patch provided by Phil Pennock.
2914 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2915 clients. Patch provided by Phil Pennock.
2917 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2918 Patch provided by Brad "anomie" Jorsch.
2920 NM/23 Bugzilla 687: Fix misparses in eximstats.
2921 Patch provided by Heiko Schlittermann.
2923 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2924 Patch provided by Heiko Schlittermann.
2926 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2927 plus update to original patch.
2929 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2931 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2932 Patch provided by David Brownlee.
2934 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2936 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2938 NM/30 Bugzilla 888: TLS documentation bugfixes.
2940 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2942 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2943 Unlike the original bugzilla I have changed all shell scripts in src tree.
2945 NM/33 Bugzilla 898: Transport filter timeout fix.
2946 Patch by Todd Rinaldo.
2948 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2949 Patch by Serge Demonchaux.
2951 NM/35 Bugzilla 39: Base64 decode bug fixes.
2952 Patch by Jakob Hirsch.
2954 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2956 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2958 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2960 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2966 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2967 ALT-N's libdkim that I have put here:
2968 http://duncanthrax.net/exim-experimental/
2970 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2971 were called 'true' and it seems that C99 defines that as a reserved
2972 keyword to be used with 'bool' variable types. That means you could
2973 not include C99-style headers which use bools without triggering
2974 build errors in sieve.c.
2976 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2977 as mailq or other aliases. Changed the --help handling significantly
2978 to do whats expected. exim_usage() emits usage/help information.
2980 SC/01 Added the -bylocaldomain option to eximstats.
2982 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2984 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2986 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2992 PH/01 Another patch from the Sieve maintainer.
2994 PH/02 When an IPv6 address is converted to a string for single-key lookup
2995 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2996 dots are used instead of colons so that keys in lsearch files need not
2997 contain colons. This was done some time before quoting was made available
2998 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2999 (notated using the quote facility) so as to distinguish them from IPv4
3000 keys. This meant that lookups for IP addresses in host lists did not work
3001 for iplsearch lookups.
3003 This has been fixed by arranging for IPv6 addresses to be expressed with
3004 colons if the lookup type is iplsearch. This is not incompatible, because
3005 previously such lookups could never work.
3007 The situation is now rather anomalous, since one *can* have colons in
3008 ordinary lsearch keys. However, making the change in all cases is
3009 incompatible and would probably break a number of configurations.
3011 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3014 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3015 conversion specification without a maximum field width, thereby enabling
3016 a rogue spamd server to cause a buffer overflow. While nobody in their
3017 right mind would setup Exim to query an untrusted spamd server, an
3018 attacker that gains access to a server running spamd could potentially
3019 exploit this vulnerability to run arbitrary code as the Exim user.
3021 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3022 $primary_hostname instead of what libspf2 thinks the hosts name is.
3024 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3025 a directory entry by the name of the lookup key. Previously, if a
3026 symlink pointed to a non-existing file or a file in a directory that
3027 Exim lacked permissions to read, a lookup for a key matching that
3028 symlink would fail. Now it is enough that a matching directory entry
3029 exists, symlink or not. (Bugzilla 503.)
3031 PH/03 The body_linecount and body_zerocount variables are now exported in the
3034 PH/04 Added the $dnslist_matched variable.
3036 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3037 This means they are set thereafter only if the connection becomes
3040 PH/06 Added the client_condition to authenticators so that some can be skipped
3041 by clients under certain conditions.
3043 PH/07 The error message for a badly-placed control=no_multiline_responses left
3044 "_responses" off the end of the name.
3046 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3048 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3049 (without spaces) instead of just copying the configuration text.
3051 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3053 PH/11 Added $max_received_linelength.
3055 PH/12 Added +ignore_defer and +include_defer to host lists.
3057 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3058 way in which PCRE > 7.0 is built.
3060 PH/14 Implemented queue_only_load_latch.
3062 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3063 MAIL command. The effect was to mangle the value on 64-bit systems.
3065 PH/16 Another patch from the Sieve maintainer.
3067 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3069 PH/18 If a system quota error occurred while trying to create the file for
3070 a maildir delivery, the message "Mailbox is full" was not appended to the
3071 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3072 only to a quota excession during the actual writing of the file.
3074 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3075 characters?) which causes problems in log lines. The DN values are now
3076 passed through string_printing() before being added to log lines.
3078 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3079 and InterBase are left for another time.)
3081 PH/21 Added message_body_newlines option.
3083 PH/22 Guard against possible overflow in moan_check_errorcopy().
3085 PH/23 POSIX allows open() to be a macro; guard against that.
3087 PH/24 If the recipient of an error message contained an @ in the local part
3088 (suitably quoted, of course), incorrect values were put in $domain and
3089 $local_part during the evaluation of errors_copy.
3095 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3096 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3099 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3100 issue a MAIL command.
3102 PH/02 In an ACL statement such as
3104 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3106 if a client was not listed at all, or was listed with a value other than
3107 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3108 the condition was not true (as it should be), so access was not denied.
3109 The bug was that the ! inversion was incorrectly passed on to the second
3110 item. This has been fixed.
3112 PH/03 Added additional dnslists conditions == and =& which are different from
3113 = and & when the dns lookup returns more than one IP address.
3115 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3116 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3118 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3119 FSYNC, which compiles an option called disable_fsync that allows for
3120 bypassing fsync(). The documentation is heavily laced with warnings.
3122 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3124 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3125 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3126 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3127 including adding "make clean"; (3) Added -fPIC when compiling the test
3128 dynamically loaded module, to get rid of a warning.
3130 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3131 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3132 = 0s. The bug is otherwise harmless.
3134 PH/07 There was a bug in the dovecot authenticator such that the value of
3135 $auth1 could be overwritten, and so not correctly preserved, after a
3136 successful authentication. This usually meant that the value preserved by
3137 the server_setid option was incorrect.
3139 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3141 PH/09 Installed PCRE release 7.0.
3143 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3144 run for batched SMTP input. It is now run at the start of every message
3145 in the batch. While fixing this I discovered that the process information
3146 (output by running exiwhat) was not always getting set for -bs and -bS
3147 input. This is fixed, and it now also says "batched" for BSMTP.
3149 PH/11 Added control=no_pipelining.
3151 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3152 patch, slightly modified), and move the expansion of helo_data till after
3153 the connection is made in the smtp transport (so it can use these
3156 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3158 PH/14 Added log_selector = +pid.
3160 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3162 PH/16 Add ${if forany and ${if forall.
3164 PH/17 Added dsn_from option to vary the From: line in DSNs.
3166 PH/18 Flush SMTP output before performing a callout, unless control =
3167 no_callout_flush is set.
3169 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3170 was true (the default) a successful delivery failed to delete the retry
3171 item, thus causing premature timeout of the address. The bug is now
3174 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3176 PH/21 Long custom messages for fakedefer and fakereject are now split up
3177 into multiline responses in the same way that messages for "deny" and
3178 other ACL rejections are.
3180 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3181 with slight modification.
3183 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3184 draft, changing the syntax and factoring some duplicate code".
3186 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3187 for deliveries of the second and subsequent messages over the same SMTP
3190 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3191 ${reduce, with only minor "tidies".
3193 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3195 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3196 expansion side effects.
3198 PH/27 When a message times out after an over-quota error from an Exim-imposed
3199 quota, the bounce message says "mailbox is full". This message was not
3200 being given when it was a system quota that was exceeded. It now should
3203 MH/03 Made $recipients available in local_scan(). local_scan() already has
3204 better access to the recipient list through recipients_list[], but
3205 $recipients can be useful in postmaster-provided expansion strings.
3207 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3208 in the case of a MAIL command with additional options following the
3209 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3210 were accidentally chopped off.
3212 PH/29 SMTP synchronization checks are implemented when a command is read -
3213 there is a check that no more input is waiting when there shouldn't be
3214 any. However, for some commands, a delay in an ACL can mean that it is
3215 some time before the response is written. In this time, more input might
3216 arrive, invalidly. So now there are extra checks after an ACL has run for
3217 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3218 pipelining has not been advertised.
3220 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3222 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3223 returned in the SMTP response when smtp_return_error_details was false.
3224 This has been fixed.
3226 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3227 instead of the C I/O that was originally supplied, because problems were
3228 reported on Solaris.
3230 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3231 Exim which did not show up earlier: it was assuming that a call to
3232 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3233 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3234 was a macro that became an assignment, so it seemed to work. This has
3235 changed to a proper function call with a void return, hence the compile
3236 error. Exim's code has been fixed.
3238 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3241 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3243 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3245 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3246 because it turns out to be too big or there is a timeout) there is no
3247 "Completed" line in the log. When some messages of this type were
3248 selected by exigrep, they were listed as "not completed". Others were
3249 picked up by some special patterns. I have improved the selection
3250 criteria to be more general.
3252 PH/38 The host_find_failed option in the manualroute router can now be set
3253 to "ignore", to completely ignore a host whose IP address cannot be
3254 found. If all hosts are ignored, the behaviour is controlled by the new
3255 host_all_ignored option.
3257 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3258 homing or because of multiple MX records with /mx) generated more than
3259 one IP address, and the following item turned out to be the local host,
3260 all the secondary addresses of the first item were incorrectly removed
3261 from the list, along with the local host and any following hosts (which
3262 is what is supposed to happen).
3264 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3265 whoever called Exim into the -H file. In the case of the daemon it was
3266 behaving confusingly. When first started, it used values for whoever
3267 started the daemon, but after a SIGHUP it used the Exim user (because it
3268 calls itself on a restart). I have changed the code so that it now always
3271 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3272 message are rejected with the same error (e.g. no authentication or bad
3273 sender address), and a DATA command is nevertheless sent (as can happen
3274 with PIPELINING or a stupid MUA), the error message that was given to the
3275 RCPT commands is included in the rejection of the DATA command. This is
3276 intended to be helpful for MUAs that show only the final error to their
3279 PH/42 Another patch from the Sieve maintainer.
3281 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3282 Eximstats - Fixed some broken HTML links and added missing column headers
3284 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3285 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3287 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3289 PH/43 Yet another patch from the Sieve maintainer.
3291 PH/44 I found a way to check for a TCP/IP connection going away before sending
3292 the response to the final '.' that terminates a message, but only in the
3293 case where the client has not sent further data following the '.'
3294 (unfortunately, this is allowed). However, in many cases there won't be
3295 any further data because there won't be any more messages to send. A call
3296 to select() can be used: if it shows that the input is "ready", there is
3297 either input waiting, or the socket has been closed. An attempt to read
3298 the next input character can distinguish the two cases. Previously, Exim
3299 would have sent an OK response which the client would never have see.
3300 This could lead to message repetition. This fix should cure that, at
3301 least in a lot of common cases.
3303 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3304 advertised in response to EHLO.
3310 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3311 fixed by 4.65/MH/01 (is this a record?) are fixed:
3313 (i) An empty string was always treated as zero by the numeric comparison
3314 operators. This behaviour has been restored.
3316 (ii) It is documented that the numeric comparison operators always treat
3317 their arguments as decimal numbers. This was broken in that numbers
3318 starting with 0 were being interpreted as octal.
3320 While fixing these problems I realized that there was another issue that
3321 hadn't been noticed. Values of message_size_limit (both the global option
3322 and the transport option) were treated as octal if they started with 0.
3323 The documentation was vague. These values are now always treated as
3324 decimal, and I will make that clear in the documentation.
3330 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3331 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3334 MH/01 Don't check that the operands of numeric comparison operators are
3335 integers when their expansion is in "skipping" mode (fixes bug
3336 introduced by 4.64-PH/07).
3338 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3339 child addresses, Exim now panics and dies. Previously, because the count
3340 is held in a short int, deliveries were likely to be lost. As such a
3341 large number of recipients for a single message is ridiculous
3342 (performance will be very, very poor), I have chosen to impose a limit
3343 rather than extend the field.
3349 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3350 leftover -K file (the existence of which was triggered by #402).
3351 While we were at it, introduced process PID as part of the -K
3352 filename. This should rule out race conditions when creating
3355 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3356 processing considerably. Previous code took too long for large mails,
3357 triggering a timeout which in turn triggers #401.
3359 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3360 in the DK code in transports.c. sendfile() is not really portable,
3361 hence the _LINUX specificness.
3363 TF/01 In the add_headers option to the mail command in an Exim filter,
3364 there was a bug that Exim would claim a syntax error in any
3365 header after the first one which had an odd number of characters
3368 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3369 callout verification, Exim cached a "reject" for the entire domain. This
3370 is correct for most verifications, but it is not correct for a recipient
3371 verification with use_sender or use_postmaster set, because in that case
3372 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3373 case of MAIL FROM:<> rejection from other early rejections (e.g.
3374 rejection of HELO). When verifying a recipient using a non-null MAIL
3375 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3376 Whatever the result of the callout, the value of the domain cache is
3377 left unchanged (for any other kind of callout, getting as far as trying
3378 RCPT means that the domain itself is ok).
3380 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3383 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3384 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3385 session, the daemon ignores ECONNECT errors and logs others; it now
3386 ignores EPIPE as well.
3388 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3389 (quoted-printable decoding).
3391 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3392 later the small subsequent patch to fix an introduced bug.
3394 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3396 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3398 PH/08 An error is now given if message_size_limit is specified negative.
3400 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3401 to be given (somewhat) arbitrary names.
3403 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3406 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3407 miscellaneous code fixes
3409 PH/10 Added the log_reject_target ACL modifier to specify where to log
3412 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3413 hostname. This is wrong, because it relates to the incoming message (and
3414 probably the interface on which it is arriving) and not to the outgoing
3415 callout (which could be using a different interface). This has been
3416 changed to use the value of the helo_data option from the smtp transport
3417 instead - this is what is used when a message is actually being sent. If
3418 there is no remote transport (possible with a router that sets up host
3419 addresses), $smtp_active_hostname is used.
3421 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3422 tweaks were necessary in order to get it to work (see also 21 below):
3423 (a) The code assumed that strncpy() returns a negative number on buffer
3424 overflow, which isn't the case. Replaced with Exim's string_format()
3426 (b) There were several signed/unsigned issues. I just did the minimum
3427 hacking in of casts. There is scope for a larger refactoring.
3428 (c) The code used strcasecmp() which is not a standard C function.
3429 Replaced with Exim's strcmpic() function.
3430 (d) The code set only $1; it now sets $auth1 as well.
3431 (e) A simple test gave the error "authentication client didn't specify
3432 service in request". It would seem that Dovecot has changed its
3433 interface. Fortunately there's a specification; I followed it and
3434 changed what the client sends and it appears to be working now.
3436 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3439 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3440 address A is aliased to B and C, where B exists and C does not. Without
3441 -v the output is "A verified" because verification stops after a
3442 successful redirection if more than one address is generated. However,
3443 with -v the child addresses are also verified. Exim was outputting "A
3444 failed to verify" and then showing the successful verification for C,
3445 with its parentage. It now outputs "B failed to verify", showing B's
3446 parentage before showing the successful verification of C.
3448 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3449 look up a TXT record in a specific list after matching in a combined
3452 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3453 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3454 they consult the DNS. I had assumed they would set it the way they
3455 wanted; and indeed my experiments on Linux seem to show that in some
3456 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3457 To be on the safe side, however, I have now made the interface to
3458 host_find_byname() similar to host_find_bydns(), with an argument
3459 containing the DNS resolver options. The host_find_byname() function now
3460 sets these options at its start, just as host_find_bydns() does. The smtp
3461 transport options dns_qualify_single and dns_search_parents are passed to
3462 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3463 of host_find_byname() use the default settings of RES_DEFNAMES
3464 (qualify_single) but not RES_DNSRCH (search_parents).
3466 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3467 spool_read_header() do less string testing, by means of a preliminary
3468 switch on the second character of optional "-foo" lines. (This is
3469 overdue, caused by the large number of possibilities that now exist.
3470 Originally there were few.) While I was there, I also converted the
3471 str(n)cmp tests so they don't re-test the leading "-" and the first
3472 character, in the hope this might squeeze out yet more improvement.
3474 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3475 flag allowing group syntax was set by the header_syntax check but not
3476 turned off, possible causing trouble later; (2) The flag was not being
3477 set at all for the header_verify test, causing "group"-style headers to
3478 be rejected. I have now set it in this case, and also caused header_
3479 verify to ignore an empty address taken from a group. While doing this, I
3480 came across some other cases where the code for allowing group syntax
3481 while scanning a header line wasn't quite right (mostly, not resetting
3482 the flag correctly in the right place). These bugs could have caused
3483 trouble for malformed header lines. I hope it is now all correct.
3485 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3486 with the "reply" argument non-NULL. The code, however (which originally
3487 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3488 but it didn't always do it. This confused somebody who was copying the
3489 code for some other use. I have removed all the tests.
3491 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3492 feature that was used to support insecure browsers during the U.S. crypto
3493 embargo. It requires special client support, and Exim is probably the
3494 only MTA that supported it -- and would never use it because real RSA is
3495 always available. This code has been removed, because it had the bad
3496 effect of slowing Exim down by computing (never used) parameters for the
3497 RSA_EXPORT functionality.
3499 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3500 authenticator to fail if there's a tab character in the incoming data
3501 (there should never be unless someone is messing about, as it's supposed
3502 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3503 if the connection is using TLS or if the remote IP is the same as the
3504 local IP, and the "valid-client-cert option" if a client certificate has
3507 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3508 authenticators. This can be used for authorization after authentication
3509 succeeds. (In the case of plaintext, it servers for both authentication
3512 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3513 if any retry times were supplied.
3515 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3516 connection, where there is no client IP address to check. In this
3517 situation, the verify now always succeeds.
3519 PH/25 Applied John Jetmore's -Mset patch.
3521 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3523 PH/27 In a string expansion for a processed (not raw) header when multiple
3524 headers of the same name were present, leading whitespace was being
3525 removed from all of them, but trailing whitespace was being removed only
3526 from the last one. Now trailing whitespace is removed from each header
3527 before concatenation. Completely empty headers in a concatenation (as
3528 before) are ignored.
3530 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3531 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3533 PH/29 [Removed. This was a change that I later backed out, and forgot to
3534 correct the ChangeLog entry (that I had efficiently created) before
3535 committing the later change.]
3537 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3538 address errors (4xx response to RCPT) over the same connection as other
3539 messages routed to the same hosts. Such deliveries are always "forced",
3540 so retry times are not inspected. This resulted in far too many retries
3541 for the affected addresses. The effect occurred only when there were more
3542 hosts than the hosts_max_try setting in the smtp transport when it had
3543 the 4xx errors. Those hosts that it had tried were not added to the list
3544 of hosts for which the message was waiting, so if all were tried, there
3545 was no problem. Two fixes have been applied:
3547 (i) If there are any address or message errors in an SMTP delivery, none
3548 of the hosts (tried or untried) are now added to the list of hosts
3549 for which the message is waiting, so the message should not be a
3550 candidate for sending over the same connection that was used for a
3551 successful delivery of some other message. This seems entirely
3552 reasonable: after all the message is NOT "waiting for some host".
3553 This is so "obvious" that I'm not sure why it wasn't done
3554 previously. Hope I haven't missed anything, but it can't do any
3555 harm, as the worst effect is to miss an optimization.
3557 (ii) If, despite (i), such a delivery is accidentally attempted, the
3558 routing retry time is respected, so at least it doesn't keep
3559 hammering the server.
3561 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3562 in ${readsocket because some servers need this prod.
3564 PH/32 Added some extra debug output when updating a wait-xxx database.
3566 PH/33 The hint "could be header name not terminated by colon", which has been
3567 given for certain expansion errors for a long time, was not being given
3568 for the ${if def:h_colon_omitted{... case.
3570 PH/34 The spec says: "With one important exception, whenever a domain list is
3571 being scanned, $domain contains the subject domain." There was at least
3572 one case where this was not true.
3574 PH/35 The error "getsockname() failed: connection reset by peer" was being
3575 written to the panic log as well as the main log, but it isn't really
3576 panic-worthy as it just means the connection died rather early on. I have
3577 removed the panic log writing for the ECONNRESET error when getsockname()
3580 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3581 runs only) independently of the message's sender address. This meant
3582 that, if the 4xx error was in fact related to the sender, a different
3583 message to the same recipient with a different sender could confuse
3584 things. In particular, this can happen when sending to a greylisting
3585 server, but other circumstances could also provoke similar problems.
3586 I have changed the default so that the retry time for these errors is now
3587 based a combination of the sender and recipient addresses. This change
3588 can be overridden by setting address_retry_include_sender=false in the
3591 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3592 remote server are returned as part of bounce messages. This was not
3593 happening for LMTP over a pipe (the lmtp transport), but now it is the
3594 same for both kinds of LMTP.
3596 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3597 in header lines that were in fact CNAMEs. This is no longer the case.
3599 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3600 and queue runs started by the daemon processed all messages. This has
3601 been fixed so that -R and -S can now usefully be given with -q<time>.
3603 PH/40 Import PCRE release 6.7 (fixes some bugs).
3605 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3607 PH/42 Give an error if -q is specified more than once.
3609 PH/43 Renamed the variables $interface_address and $interface_port as
3610 $received_ip_address and $received_port, to make it clear that these
3611 values apply to message reception, and not to the outgoing interface when
3612 a message is delivered. (The old names remain recognized, of course.)
3614 PH/44 There was no timeout on the connect() call when using a Unix domain
3615 socket in the ${readsocket expansion. There now is.
3617 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3618 be meaningful with "accept".
3620 SC/01 Eximstats V1.43
3621 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3623 SC/02 Eximstats V1.44
3624 Use a glob alias rather than an array ref in the generated
3625 parser. This improves both readability and performance.
3627 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3628 Collect SpamAssassin and rejection statistics.
3629 Don't display local sender or destination tables unless
3630 there is data to show.
3631 Added average volumes into the top table text output.
3633 SC/04 Eximstats V1.46
3634 Collect data on the number of addresses (recipients)
3635 as well as the number of messages.
3637 SC/05 Eximstats V1.47
3638 Added 'Message too big' to the list of mail rejection
3639 reasons (thanks to Marco Gaiarin).
3641 SC/06 Eximstats V1.48
3642 Mainlog lines which have GMT offsets and are too short to
3643 have a flag are now skipped.
3645 SC/07 Eximstats V1.49 (Alain Williams)
3646 Added the -emptyok flag.
3648 SC/08 Eximstats V1.50
3649 Fixes for obtaining the IP address from reject messages.
3651 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3652 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3653 whitespace changes from 4.64-PH/27
3655 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3658 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3659 are found, allow negative numbers in numeric criteria)
3661 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3663 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3664 to match changes made in 4.64-PH/43
3666 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3668 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3669 "domain" is actually an IP address, and force a failure. This locks out
3670 those revolvers/nameservers that support "A-for-A" lookups, in
3671 contravention of the specifications.
3673 PH/48 When a host name was looked up from an IP address, and the subsequent
3674 forward lookup of the name timed out, the host name was left in
3675 $sender_host_name, contrary to the specification.
3677 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3678 restricted to single-key lookups, Exim was not diagnosing an error if
3679 * or *@ was used with a query-style lookup.
3681 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3683 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3684 long ago, but noone interested enough thought of it. Let's just say that
3685 the "1.1" means that there are some new functions that weren't there at
3686 some point in the past.
3688 PH/51 Error processing for expansion failure of helo_data from an smtp
3689 transport during callout processing was broken.
3691 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3692 tested/used via the -bh/-bhc/-bs options.
3694 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3695 bug, fixed in subsequent PCRE releases).
3697 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3698 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3700 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3706 SC/01 Use a glob alias rather than an array ref in eximstats generated
3707 parser. This improves both readability and performance.
3709 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3710 Don't display local sender or destination tables in eximstats unless
3711 there is data to show.
3712 Added average volumes into the eximstats top table text output.
3714 SC/03 Collect data on the number of addresses (recipients) as well
3715 as the number of messages in eximstats.
3717 TF/01 Correct an error in the documentation for the redirect router. Exim
3718 does (usually) call initgroups() when daemonizing.
3720 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3721 with consistent privilege compared to when running as a daemon.
3723 TF/03 Note in the spec that $authenticated_id is not set for local
3724 submissions from trusted users.
3726 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3727 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3729 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3730 by adding some example configuration directives to the default
3731 configuration file. A little bit of work is required to uncomment the
3732 directives and define how usernames and passwords are checked, but
3733 there is now a framework to start from.
3735 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3736 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3737 without this. I don't know how relevant this is to other LDAP libraries.
3739 PH/02 Add the verb name to the "unknown ACL verb" error.
3741 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3743 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3745 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3746 directory not expanded when it should be if an expanded home directory
3747 was set for the address (which is overridden by the transport).
3749 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3752 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3753 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3754 because it is too late at that time, and has no effect.
3756 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3757 security issue with \' (bugzilla #107). I could not use the
3758 PQescapeStringConn() function, because it needs a PGconn value as one of
3761 PH/08 When testing addresses using -bt, indicate those final addresses that
3762 are duplicates that would not cause an additional delivery. At least one
3763 person was confused, thinking that -bt output corresponded to deliveries.
3764 (Suppressing duplicates isn't a good idea as you lose the information
3765 about possibly different redirections that led to the duplicates.)
3767 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3768 systems where poll() doesn't work, in particular OS X.
3770 PH/10 Added more information to debugging output for retry time not reached.
3772 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3773 operations in malware.c.
3775 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3778 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3779 syslog_duplication set false, log lines that would normally be written
3780 both the the main log and to the reject log were not written to syslog at
3783 PH/14 In the default configuration, change the use of "message" in ACL warn
3784 statements to "add_header".
3786 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3787 not followed by a command (e.g. "seen endif").
3789 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3790 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3793 PH/17 Added extra conditions to the default value of delay_warning_condition
3797 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3798 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3799 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3802 The Auto-Submitted: and various List- headers are standardised, whereas I
3803 don't think Precedence: ever was.
3805 PH/18 Refactored debugging code in route_finduser() to show more information,
3806 in particular, the error code if getpwnam() issues one.
3808 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3809 This is apparently needed in addition to the PH/07 change above to avoid
3810 any possible encoding problems.
3812 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3813 but not after initializing Perl.
3815 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3816 output them only if debugging. By default they are written stderr,
3817 apparently, which is not desirable.
3819 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3822 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3825 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3827 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3828 authenticated or an ident call has been made. Suppress the default
3829 values for $authenticated_id and $authenticated_sender (but permit -oMai
3830 and -oMas) when testing with -bh.
3832 PH/24 Re-jigged the order of the tests in the default configuration so that the
3833 tests for valid domains and recipients precede the DNS black list and CSA
3834 tests, on the grounds that those ones are more expensive.
3836 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3837 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3838 This bug exists in every version of Exim that I still have, right back to
3841 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3842 However, an attempt to turn on case-sensitivity in a regex key by
3843 including (?-i) didn't work because the subject string was already
3844 lowercased, and the effects were non-intuitive. It turns out that a
3845 one-line patch can be used to allow (?-i) to work as expected.
3851 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3852 other effects) broke the use of negated acl sub-conditions.
3854 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3857 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3858 "Deny" causes Exim to reject the incoming connection with a 554 error.
3859 Unfortunately, if there is a major crisis, such as a disk failure,
3860 tcp-wrappers gives "deny", whereas what one would like would be some
3861 kind of temporary error. A kludge has been added to help with this.
3862 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3863 554 error is used if errno is still zero or contains ENOENT (which occurs
3864 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3867 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3869 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3870 errors. Otherwise a message that provokes a temporary error (when other
3871 messages do not) can cause a whole host to time out.
3873 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3874 addresses were routed directly to files or pipes from a redirect router.
3875 File deliveries just didn't batch; pipe deliveries might have suffered
3878 PH/06 A failure to get a lock for a hints database would erroneously always say
3879 "Failed to get write lock", even when it was really a read lock.
3881 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3882 of 0600. This has been changed to use the value of the lockfile_mode
3883 option (which defaults to 0600).
3885 PH/08 Applied small patch from the Sieve maintainer.
3887 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3888 folder from quota calculations, a direct delivery into this folder messed
3889 up the contents of the maildirsize file. This was because the regex was
3890 used only to exclude .Trash (or whatever) when the size of the mailbox
3891 was calculated. There was no check that a delivery was happening into an
3892 excluded directory. This bug has been fixed by ignoring all quota
3893 processing for deliveries into excluded directories.
3895 PH/10 Added the maildirfolder_create_regex option to appendfile.
3901 PH/01 The code for finding all the local interface addresses on a FreeBSD
3902 system running IPv6 was broken. This may well have applied to all BSD
3903 systems, as well as to others that have similar system calls. The broken
3904 code found IPv4 interfaces correctly, but gave incorrect values for the
3905 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3906 that it would not match correctly against @[] and not recognize the IPv6
3909 PH/02 The ipliteral router was not recognizing addresses of the form user@
3910 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3912 PH/03 Added disable_ipv6.
3914 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3915 decoded form, because it is most often used to construct To: headers
3916 lines in autoreplies, and the decoded form may well be syntactically
3917 invalid. However, $reply_address has leading white space removed, and all
3918 newlines turned into spaces so that the autoreply transport does not
3921 PH/05 If group was specified without a user on a router, and no group or user
3922 was specified on a transport, the group from the router was ignored.
3924 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3925 for visible compile-time settings that can be used to change these
3926 numbers, for those that want even more. Backwards compatibility with old
3927 spool files has been maintained. However, going back to a previous Exim
3928 release will lost any variables that are in spool files.
3930 PH/07 Two small changes when running in the test harness: increase delay when
3931 passing a TCP/IP connection to a new process, in case the original
3932 process has to generate a bounce, and remove special handling of
3933 127.0.0.2 (sic), which is no longer necessary.
3935 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3936 be the same on different OS.
3938 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3941 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3942 whether --show-vars was specified or not
3944 JJ/02 exipick: Added support for new ACL variable spool format introduced
3947 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3948 syntactically invalid From: or Reply-to: line, and a filter used this to
3949 generate an autoreply, and therefore failed to obtain an address for the
3950 autoreply, Exim could try to deliver to a non-existent relative file
3951 name, causing unrelated and misleading errors. What now happens is that
3952 it logs this as a hard delivery error, but does not attempt to create a
3955 PH/11 The exinext utility has a -C option for testing purposes, but although
3956 the given file was scanned by exinext itself; it wasn't being passed on
3957 when Exim was called.
3959 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3960 an end-of-file indication when reading a command response.
3962 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3963 compiled. In many other places in Exim, IPv6 addresses are always
3964 recognized, so I have changed this. It also means that IPv4 domain
3965 literals of the form [IPV4:n.n.n.n] are now always recognized.
3967 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3968 used if the router is not running as root, for example, when verifying at
3969 ACL time, or when using -bh. The debugging output from this situation was
3970 non-existent - all you got was a failure to exec. I have made two
3973 (a) Failures to set uid/gid, the current directory, or a process leader
3974 in a subprocess such as that created by queryprogram now generate
3975 suitable debugging output when -d is set.
3977 (b) The queryprogram router detects when it is not running as root,
3978 outputs suitable debugging information if -d is set, and then runs
3979 the subprocess without attempting to change uid/gid.
3981 PH/15 Minor change to Makefile for building test_host (undocumented testing
3984 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3985 additional section of a DNS packet that returns MX or SRV records.
3986 Instead, it always explicitly searches for A/AAAA records. This avoids
3987 major problems that occur when a DNS server includes only records of one
3988 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3989 fixed another bug: if SRV records were looked up and the corresponding
3990 address records were *not* found in the additional section, the port
3991 values from the SRV records were lost.
3993 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3994 using the correct key (the original address) when searching the retry
3995 rules in order to find which one to use for generating the retry hint.
3997 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3998 adding the default one. Similarly, if it contains a Reply-To: header, the
3999 errors_reply_to option, if set, is not used.
4001 PH/19 When calculating a retry time, Exim used to measure the "time since
4002 failure" by looking at the "first failed" field in the retry record. Now
4003 it does not use this if it is later than than the arrival time of the
4004 message. Instead it uses the arrival time. This makes for better
4005 behaviour in cases where some deliveries succeed, thus re-setting the
4006 "first failed" field. An example is a quota failure for a huge message
4007 when small messages continue to be delivered. Without this change, the
4008 "time since failure" will always be short, possible causing more frequent
4009 delivery attempts for the huge message than are intended.
4010 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4012 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4013 $1, $2, $3) because the numerical variables can be reset during some
4014 expansion items (e.g. "match"), thereby losing the authentication data.
4016 PH/21 Make -bV show the size of off_t variables so that the test suite can
4017 decide whether to run tests for quotas > 2G.
4019 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4020 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4021 filecount value is greater than 2G or if a quota value is greater than 2G
4022 on a system where the size of off_t is not greater than 4, a panic error
4025 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4026 never match. The debug and -bh output now contains an explicit error
4027 message indicating a malformed IPv4 address or mask.
4029 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4030 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4031 PH/23 above applies.
4033 PH/25 Do not write to syslog when running in the test harness. The only
4034 occasion when this arises is a failure to open the main or panic logs
4035 (for which there is an explicit test).
4037 PH/26 Added the /no_tell option to "control=freeze".
4039 PH/27 If a host name lookup failed very early in a connection, for example, if
4040 the IP address matched host_lookup and the reverse lookup yielded a name
4041 that did not have a forward lookup, an error message of the form "no IP
4042 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4043 could be logged. Now it outputs the IP address instead of "NULL".
4045 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4046 allows the sender and the authenticated sender to be set when
4047 submitting a message from within Exim. Since child_open_exim() is
4048 documented for local_scan(), the new function should be too.
4050 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4051 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4052 results in an empty string is now treated as unset.
4054 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4056 PH/31 Added sender_verify_fail logging option.
4058 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4059 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4060 tidied the source and removed it altogether.
4062 PH/33 When a queue run was abandoned because the load average was too high, a
4063 log line was always written; now it is written only if the queue_run log
4064 selector is set. In addition, the log line for abandonment now contains
4065 information about the queue run such as the pid. This is always present
4066 in "start" and "stop" lines but was omitted from the "abandon" line.
4068 PH/34 Omit spaces between a header name and the colon in the error message that
4069 is given when verify = headers_syntax fails (if there are lots of them,
4070 the message gets confusing).
4072 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4073 names, as there are now some PTR records that contain slashes. This check
4074 is only to protect against broken name servers that fall over on strange
4075 characters, so the fact that it applies to all lookups doesn't matter.
4077 PH/36 Now that the new test suite is complete, we can remove some of the
4078 special code in Exim that was needed for the old test suite. For example,
4079 sorting DNS records because real resolvers return them in an arbitrary
4080 order. The new test suite's fake resolver always returns records in the
4083 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4084 bounces) except when queue_only is set, to avoid logging races between
4085 the different processes.
4087 PH/38 Panic-die if .include specifies a non-absolute path.
4089 PH/39 A tweak to the "H" retry rule from its user.
4091 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4092 a label. They prevented compilation on older perls.
4094 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4095 a warning to be raised on newish perls.
4097 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4098 on queue. Changes to match documented behaviour of showing count of
4099 messages matching specified criteria.
4101 PH/40 Changed the default ident timeout from 30s to 5s.
4103 PH/41 Added support for the use of login_cap features, on those BSD systems
4104 that have them, for controlling the resources used by pipe deliveries.
4106 PH/42 The content-scanning code uses fopen() to create files in which to put
4107 message data. Previously it was not paying any attention to the mode of
4108 the files. Exim runs with umask(0) because the rest of the code creates
4109 files with open(), and sets the required mode explicitly. Thus, these
4110 files were ending up world-writeable. This was not a big issue, because,
4111 being within the spool directory, they were not world-accessible. I have
4112 created a function called modefopen, which takes an additional mode
4113 argument. It sets umask(777), creates the file, chmods it to the required
4114 mode, then resets the umask. All the relevant calls to fopen() in the
4115 content scanning code have been changed to use this function.
4117 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4118 to 24 hours. This avoids potential overflow problems when processing G
4119 and H retry rules. I suspect nobody ever tinkers with this value.
4121 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4123 PH/45 When the plaintext authenticator is running as a client, the server's
4124 challenges are checked to ensure they are valid base64 strings. By
4125 default, the authentication attempt is cancelled if an invalid string is
4126 received. Setting client_ignore_invalid_base64 true ignores these errors.
4127 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4128 they are received. Thus, the responses can be made to depend on the
4129 challenges. If an invalid string is ignored, an empty string is placed in
4132 PH/46 Messages that are created by the autoreply transport now contains a
4133 References: header, in accordance with RFCs 2822 and 3834.
4135 PH/47 Added authenticated_sender_force to the smtp transport.
4137 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4139 PH/49 Installed latest patch from the Sieve maintainer.
4141 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4142 was also set, the appendfile transport was unnecessarily scanning a
4143 directory of message files (e.g. for maildir delivery) to find the count
4144 of files (along with the size), even though it did not need this
4145 information. It now does the scan only if it needs to find either the
4146 size of the count of files.
4148 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4150 PH/52 Two bugs concerned with error handling when the smtp transport is
4153 (i) Exim was not creating retry information for temporary errors given
4154 for individual recipients after the DATA command when the smtp transport
4155 was used in LMTP mode. This meant that they could be retried too
4156 frequently, and not timed out correctly.
4158 (ii) Exim was setting the flag that allows error details to be returned
4159 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4160 recipients that were returned after the DATA command.
4162 PH/53 This is related to PH/52, but is more general: for any failing address,
4163 when detailed error information was permitted to be returned to the
4164 sender, but the error was temporary, then after the final timeout, only
4165 "retry timeout exceeded" was returned. Now it returns the full error as
4166 well as "retry timeout exceeded".
4168 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4169 do this, and (what is worse) MTAs that accept it.
4171 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4172 will now be deprecated.
4174 PH/56 New os.c-cygwin from the Cygwin maintainer.
4176 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4177 formats (previously only available in exim formats via -bpr, -bpru,
4178 and -bpra. Now also available in native and exiqgrep formats)
4180 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4181 with very large, slow to parse queues
4183 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4185 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4187 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4188 responses to authentication challenges, though it was showing the
4189 challenges; (ii) I've removed the CR characters from the debug output for
4192 PH/58 Allow for the insertion of a newline as well as a space when a string
4193 is turned into more than one encoded-word during RFC 2047 encoding. The
4194 Sieve code now uses this.
4196 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4197 data_4xx, lost_connection, tls_required.
4199 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4200 message was being sent as an SMTP response.
4202 PH/61 Add -l and -k options to exicyclog.
4204 PH/62 When verifying, if an address was redirected to one new address, so that
4205 verification continued, and the new address failed or deferred after
4206 having set something in $address_data, the value of $address_data was not
4207 passed back to the ACL. This was different to the case when no
4208 redirection occurred. The value is now passed back in both cases.
4210 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4211 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4212 use login_cap.h, so on its own it isn't the distinguishing feature. The
4213 new name refers directly to the setclassresources() function.
4215 PH/65 Added configuration files for NetBSD3.
4217 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4219 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4220 is preferred over IPv4.
4222 PH/68 The bounce_return_message and bounce_return_body options were not being
4223 honoured for bounces generated during the reception of non-SMTP messages.
4224 In particular, this applied to messages rejected by the ACL. This bug has
4225 been fixed. However, if bounce_return_message is true and bounce_return_
4226 body is false, the headers that are returned for a non-SMTP message
4227 include only those that have been read before the error was detected.
4228 (In the case of an ACL rejection, they have all been read.)
4230 PH/69 The HTML version of the specification is now built in a directory called
4231 spec_html instead of spec.html, because the latter looks like a path with
4232 a MIME-type, and this confuses some software.
4234 PH/70 Catch two compiler warnings in sieve.c.
4236 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4237 function verify_get_ident() calls ip_connect() to connect a socket, but
4238 if the "connect()" function timed out, ip_connect() used to close the
4239 socket. However, verify_get_ident() also closes the socket later, and in
4240 between Exim writes to the log, which may get opened at this point. When
4241 the socket was closed in ip_connect(), the log could get the same file
4242 descriptor number as the socket. This naturally causes chaos. The fix is
4243 not to close the socket in ip_connect(); the socket should be closed by
4244 the function that creates it. There was only one place in the code where
4245 this was missing, in the iplookup router, which I don't think anybody now
4246 uses, but I've fixed it anyway.
4248 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4249 well as to direct DNS lookups. Otherwise the handling of names in host
4250 lists is inconsistent and therefore confusing.
4256 PH/01 Two changes to the default runtime configuration:
4258 (1) Move the checks for relay_from_hosts and authenticated clients from
4259 after to before the (commented out) DNS black list checks.
4261 (2) Add control=submission to the relay_from_hosts and authenticated
4262 clients checks, on the grounds that messages accepted by these
4263 statements are most likely to be submissions.
4265 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4267 (1) Generate an error if the third argument for the ${prvs expansion is
4270 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4273 (3) Reset the variables that are obtained from the first argument of
4274 ${prvscheck and used in the second argument before leaving the code,
4275 because their memory is reclaimed, so using them afterwards may do
4278 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4279 one (it's much easier than Tom thought :-).
4281 (5) Because of (4), we can now allow for the use of $prvscheck_result
4282 inside the third argument.
4284 PH/03 For some reason, the default setting of PATH when running a command from
4285 a pipe transport was just "/usr/bin". I have changed it to
4288 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4289 anything to be listed in the output from -bV.
4291 PH/05 When a filter generated an autoreply, the entire To: header line was
4292 quoted in the delivery log line, like this:
4294 => >A.N.Other <ano@some.domain> <original@ddress> ...
4296 This has been changed so that it extracts the operative address. There
4297 may be more than one such address. If so, they are comma-separated, like
4300 => >ano@some.domain,ona@other.domain <original@ddress> ...
4302 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4303 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4304 not being looked up in the rDNS to get a host name, Exim was showing the
4305 IP address twice in Received: lines, even though the IP addresses were
4306 identical. For example:
4308 Received: from [1.2.3.4] (helo=[1.2.3.4])
4310 However, if the real host name was known, it was omitting the HELO data
4311 if it matched the actual IP address. This has been tidied up so that it
4312 doesn't show the same IP address twice.
4314 PH/07 When both +timestamp and +memory debugging was on, the value given by
4315 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4316 called by the debug printing, thereby overwriting the timestamp buffer.
4317 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4319 PH/08 When the original message was included in an autoreply transport, it
4320 always said "this is a copy of the message, including all the headers",
4321 even if body_only or headers_only was set. It now gives an appropriate
4324 PH/09 Applied a patch from the Sieve maintainer which:
4326 o fixes some comments
4327 o adds the (disabled) notify extension core
4328 o adds some debug output for the result of if/elsif tests
4329 o points to the current vacation draft in the documentation
4330 and documents the missing references header update
4334 o fixes a bug in processing the envelope test (when testing
4335 multiple envelope elements, the last element determined the
4338 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4339 Electronic Mail") by including:
4341 Auto-submitted: auto-generated
4343 in the messages that it generates (bounce messages and others, such as
4344 warnings). In the case of bounce messages for non-SMTP messages, there was
4345 also a typo: it was using "Auto_submitted" (underscore instead of
4346 hyphen). Since every message generated by Exim is necessarily in response
4347 to another message, thes have all been changed to:
4349 Auto-Submitted: auto-replied
4351 in accordance with these statements in the RFC:
4353 The auto-replied keyword:
4355 - SHOULD be used on messages sent in direct response to another
4356 message by an automatic process,
4358 - MUST NOT be used on manually-generated messages,
4360 - MAY be used on Delivery Status Notifications (DSNs) and Message
4361 Disposition Notifications (MDNs),
4363 - MUST NOT be used on messages generated by automatic or periodic
4364 processes, except for messages which are automatic responses to
4367 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4368 to the default Received: header definition.
4370 PH/12 Added log selector acl_warn_skipped (default on).
4372 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4373 variables because (a) they are in the wrong storage pool and (b) even if
4374 they were copied, it wouldn't work properly because of the caching.
4376 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4377 checking when decoding. Apparently there are clients that generate
4378 overlong encoded strings. Why am I not surprised?
4380 PH/15 If the first argument of "${if match_address" was not empty, but did not
4381 contain an "@" character, Exim crashed. Now it writes a panic log message
4382 and treats the condition as false.
4384 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4386 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4387 extension "envelope-auth". The code is finished and in agreement with
4388 other implementations, but there is no documentation so far and in fact,
4389 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4390 not changing the active code.
4392 Print executed "if" and "elsif" statements when debugging is used. This
4393 helps a great deal to understand what a filter does.
4395 Document more things not specified clearly in RFC3028. I had all this
4396 sorted out, when out of a sudden new issues came to my mind. Oops."
4398 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4401 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4402 canonical form (as documented). However, after a host name lookup from
4403 the IP address, check_host() was doing a simple string comparison with
4404 addresses acquired from the DNS when checking that the found name did
4405 have the original IP as one of its addresses. Since any found IPv6
4406 addresses are likely to be in abbreviated form, the comparison could
4407 fail. Luckily, there already exists a function for doing the comparison
4408 by converting both addresses to binary, so now that is used instead of
4409 the text comparison.
4411 PH/20 There was another similar case to PH/19, when a complete host name was
4412 given in a host list; looking up its IP address could give an abbreviated
4413 form, whereas the current host's name might or might not be abbreviated.
4414 The same fix has been applied.
4420 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4421 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4424 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4425 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4427 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4429 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4430 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4431 Also, for "Auto-Submitted", treat anything other than "no" as
4432 non-personal, in accordance with RFC 3834. (Previously it treated
4433 anything starting "auto-" as non-personal.)
4435 TF/01 The control=submission/name=... option had a problem with syntax
4436 errors if the name included a slash character. The /name= option
4437 now slurps the rest of the string, so it can include any characters
4438 but it must come last in the list of options (after /sender_retain
4441 PH/05 Some modifications to the interface to the fake nameserver for the new
4449 TK/01 Added the "success_on_redirect" address verification option. See
4450 NewStuff for rationale and an example.
4452 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4454 PH/02 Patch to exigrep to allow it to work on syslog lines.
4456 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4457 fread() to skip over the body file's header line, because in Cygwin the
4458 header line is locked and is inaccessible.
4460 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4461 co-exist for some time) to make it clear that it is the Exim ID that is
4462 referenced, not the Message-ID: header line.
4464 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4465 string_format() function, because snprintf() does not exist on all
4468 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4469 ${stat: expansion item.
4471 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4472 protocol synchronization error", to keep the pedants happy.
4474 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4475 well as for IRIX systems, when gcc is being used. See the host.c source
4478 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4480 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4483 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4484 transport and to the smtp transport in LMTP mode.
4486 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4488 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4489 run a filter in a subprocess. This could lead to confusion in subsequent
4490 lookups in the parent process. There should also be a search_tidyup() at
4491 the end of the subprocess.
4493 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4494 only if the host matched helo_try_verify_hosts, which caused the
4495 verification to occur when the EHLO/HELO command was issued. The ACL just
4496 tested the remembered result. Now, if a previous verification attempt has
4497 not happened, "verify = helo" does it there and then.
4499 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4501 TK/03 Fix log output including CR from clamd.
4503 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4504 exist provoked a memory error which could cause a segfault.
4506 PH/15 Installed PCRE 6.2
4508 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4510 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4511 of the problem. Specifically, suggested +O2 rather than +O1 for the
4514 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4516 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4517 record, the port was not correctly logged when the outgoing_port log
4518 selector was set (it logged the transort's default port).
4520 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4521 fallback_hosts, and "hosts" in the smtp transport.
4523 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4524 host errors such as "Connection refused".
4526 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4527 authentication with radiusclient 0.4.9:
4529 - Error returned from rc_read_config was caught wrongly
4530 - Username/password not passed on to radius server due to wrong length.
4532 The presumption is that some radiusclient API changes for 4.51/PH/17
4533 were not taken care of correctly. The code is still untested by me (my
4534 Linux distribution still has 0.3.2 of radiusclient), but it was
4535 contributed by a Radius user.
4537 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4538 expanding the "port" option of the smtp transport.
4540 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4541 while reading a MIME header. Thanks to Tom Hughes for a patch.
4543 PH/24 Include config.h inside local_scan.h so that configuration settings are
4546 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4547 that in an ACL for RCPT (for example), you can examine exactly what was
4550 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4551 commands, but it was not correctly comparing the address with the actual
4552 client host address. Thus, it would show the EHLO address in Received:
4553 header lines when this was not necessary.
4555 PH/27 Added the % operator to ${eval:}.
4557 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4558 it should be ignoring failures (because with -C, for example, it has lost
4559 privilege). It wasn't ignoring creation failures other than "already
4562 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4565 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4566 because an input line was too long, either on its own, or by virtue of
4567 too many continuations, the temporary file was not being removed, and the
4568 return code was incorrect.
4570 PH/31 Missing "BOOL" in function definition in filtertest.c.
4572 PH/32 Applied Sieve patches from the maintainer.
4574 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4576 PH/33 Added "verify = not_blind".
4578 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4579 Local/Makefile (with some defaults set). These are used in built scripts
4580 such as exicyclog, but they have never been used in the exim_install
4581 script (though there are many overriding facilities there). I have
4582 arranged that the exim_install script now takes note of these two
4585 PH/35 Installed configuration files for Dragonfly.
4587 PH/36 When a locally submitted message by a trusted user did not contain a
4588 From: header, and the sender address was obtained from -f or from an SMTP
4589 MAIL command, and the trusted user did not use -F to supply a sender
4590 name, $originator_name was incorrectly used when constructing a From:
4591 header. Furthermore, $originator_name was used for submission mode
4592 messages from external hosts without From: headers in a similar way,
4593 which is clearly wrong.
4595 PH/37 Added control=suppress_local_fixups.
4597 PH/38 When log_selector = +received_sender was set, and the addition of the
4598 sender made the log line's construction buffer exactly full, or one byte
4599 less than full, an overflow happened when the terminating "\n" was
4602 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4603 when the result of a list match is failure because a DNS lookup failed.
4605 PH/40 RM_COMMAND is now used in the building process.
4607 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4608 the "build-* directories that it finds.
4610 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4611 address in a domain literal was a prefix of an interface address.
4613 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4614 when verifying a sender address, unless rewrite_headers is false.
4616 PH/44 Wrote a long comment about why errors_to addresses are verified as
4617 recipients, not senders.
4619 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4620 the ratelimit ACL was added.
4622 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4624 PH/46 Added extra information about PostgreSQL errors to the error string.
4626 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4627 avoiding the need to install special zones in a real server. This is
4628 backwards compatible; if it can't find the fake resolver, it drops back.
4629 Thus, both old and new test suites can be run.
4631 TF/02 Added util/ratelimit.pl
4633 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4634 clock is set back in time.
4636 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4637 Candler <B.Candler@pobox.com>.
4639 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4640 OK for addresses that are the result of redirections.
4642 PH/48 A number of further additions for the benefit of the new test suite,
4643 including a fake gethostbyname() that interfaces to the fake DNS resolver
4646 TF/06 The fix for widen_domains has also been applied to qualify_single and
4647 search_parents which are the other dnslookup options that can cause
4650 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4653 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4655 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4656 service" if it encountered an MX record with an empty target hostname.
4657 The message is now "an MX or SRV record indicated no SMTP service".
4659 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4660 if the DNS of the sending site is misconfigured. This is quite a
4661 common situation. This change restores the behaviour of treating a
4662 helo verification defer as a failure.
4664 PH/51 If self=fail was set on a router, the bounce message did not include the
4665 actual error message.
4671 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4673 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4674 command itself ended in error, the underlying message about the transport
4675 filter timeout was being overwritten with the pipe command error. Now the
4676 underlying error message should be appended to the second error message.
4678 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4680 PH/02 Reduce the amount of output that "make" produces by default. Full output
4681 can still be requested.
4683 PH/03 The warning log line about a condition test deferring for a "warn" verb
4684 was being output only once per connection, rather than after each
4685 occurrence (because it was using the same function as for successful
4686 "warn" verbs). This seems wrong, so I have changed it.
4688 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4689 it should not have, which might have caused a crash in the right
4690 circumstances, but probably never did.
4692 PH/04 Installed a modified version of Tony Finch's patch to make submission
4693 mode fix the return path as well as the Sender: header line, and to
4694 add a /name= option so that you can make the user's friendly name appear
4697 TF/03 Added the control = fakedefer ACL modifier.
4699 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4700 Mark Lowes for thorough testing.
4702 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4704 TK/03 Merged latest SRS patch from Miles Wilton.
4706 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4707 with the definition in sysexits.h (which is #included earlier).
4708 Fortunately, Exim does not actually use EX_OK. The code used to try to
4709 preserve the sysexits.h value, by assuming that macro definitions were
4710 scanned for macro replacements. I have been disabused of this notion,
4711 so now the code just undefines EX_OK before #including unistd.h.
4713 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4714 in the smtp transport. When a block could not be written in a single
4715 write() function, the timeout was being re-applied to each part-write.
4716 This seems wrong - if the receiver was accepting one byte at a time it
4717 would take for ever. The timeout is now adjusted when this happens. It
4718 doesn't have to be particularly precise.
4720 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4721 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4723 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4724 without a domain if the check to <postmaster@domain> fails.
4726 SC/01 Eximstats: added -xls and the ability to specify output files
4727 (patch written by Frank Heydlauf).
4729 SC/02 Eximstats: use FileHandles for outputting results.
4731 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4733 SC/04 Eximstats: fixed display of large numbers with -nvr option
4735 SC/05 Eximstats: fixed merging of reports with empty tables.
4737 SC/06 Eximstats: added the -include_original_destination flag
4739 SC/07 Eximstats: removed tabs and trailing whitespace.
4741 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4743 TK/06 MBOX spool code: Add real "From " MBOX separator line
4744 so the .eml file is really in mbox format (even though
4745 most programs do not really care). Patch from Alex Miller.
4747 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4748 The latter is generated from $received_to and is only set if the
4749 message has one envelope recipient. SA can use these headers,
4750 obviously out-of-the-box. Patch from Alex Miller.
4752 PH/08 The ${def test on a variable was returning false if the variable's
4753 value was "0", contrary to what the specification has always said!
4754 The result should be true unless the variable is empty.
4756 PH/09 The syntax error of a character other than { following "${if
4757 def:variable_name" (after optional whitespace) was not being diagnosed.
4758 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4759 accidental colon was present, for example, could give incorrect results.
4761 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4762 result is used (not including appendfile, where other changes are about
4765 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4766 This involved changing a lot of size variables from int to off_t. It
4767 should work with maildirs and everything.
4769 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4770 spamd dying while we are connected to it.
4772 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4775 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4776 function for BDB 4.3.
4778 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4780 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4781 the sources for PCRE have been re-arranged and more files are now
4784 PH/15 The code I had for printing potentially long long variables in PH/11
4785 above was not the best (it lost precision). The length of off_t variables
4786 is now inspected at build time, and an appropriate printing format (%ld
4787 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4788 to be "long long int" or "long int". This is needed for the internal
4789 formatting function string_vformat().
4791 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4792 the configuration file to be ":syslog", then the script "guesses" where
4793 the logs files are, rather than using the compiled in default. In our
4794 case the guess is not the same as the compiled default, so the script
4795 suddenly stopped working when I started to use syslog. The patch checks
4796 to see if log_file_path is "". If so, it attempts to read it from exim
4797 with no configuration file to get the compiled in version, before it
4798 falls back to the previous guessing code."
4800 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4801 implementing BATV in an Exim configuration. See NewStuff for the gory
4804 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4805 Makefile that are specific to HP-UX.
4807 PH/18 If the "use_postmaster" option was set for a recipient callout together
4808 with the "random" option, the postmaster address was used as the MAIL
4809 FROM address for the random test, but not for the subsequent recipient
4810 test. It is now used for both.
4812 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4813 patch removes a few documentation additions to RFC 3028, because the
4814 latest draft now contains them. It adds the new en;ascii-case comparator
4815 and a new error check for 8bit text in MIME parts. Comparator and
4816 require names are now matched exactly. I enabled the subaddress
4817 extension, but it is not well tested yet (read: it works for me)."
4819 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4820 rework some of the code of TK/09 above to avoid the hardwired use of
4821 "%lld" and "long long". Replaced the call to snprintf() with a call to
4824 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4825 records point to non-existent hosts", "retry timeout exceeded", and
4826 "retry time not reached for any host after a long failure period".
4828 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4829 experimental DomainKeys support:
4831 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4832 (2) On an error such as an illegally used "control", the wrong name for
4833 the control was given.
4835 These problems did NOT occur unless DomainKeys support was compiled.
4837 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4839 PH/24 Added ${if match_ip condition.
4841 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4842 databases so that it will be absolutely obvious if a crash occurs in the
4843 DB library. This is a regular occurrence (often caused by mis-matched
4846 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4847 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4848 picked up on a user's system that detects such things. There doesn't seem
4849 to be a gcc warning option for this - only an attribute that has to be
4850 put on the function's prototype. It seems that in Fedora Core 4 they have
4851 set this on a number of new functions. No doubt there will be more in due
4854 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4855 specify a transport. However, if an address that was verified by such a
4856 router was the subject of a callout, Exim crashed because it tried to
4857 read the rcpt_include_affixes from the non-existent transport. Now it
4858 just assumes that the setting of that option is false. This bug was
4859 introduced by 4.51/PH/31.
4861 PH/28 Changed -d+all to exclude +memory, because that information is very
4862 rarely of interest, but it makes the output a lot bigger. People tend to
4863 do -d+all out of habit.
4865 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4866 code in os-type was giving problems when libc.so lives in lib64, like on
4869 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4870 aren't the modern standard, and it seems that some systems' include files
4871 don't always have them. Exim was already checking for some of the newer
4872 ones like T_AAAA, and defining it itself. I've added checks for all the
4873 record types that Exim uses.
4875 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4876 not automatically generating a new one, as it is supposed to. This
4877 prevented TLS from working. If the file did exist, but contained invalid
4878 data, a new version was generated, as expected. It was only the case of a
4879 non-existent file that was broken.
4881 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4882 with a change in libdomainkeys > 0.64.
4884 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4885 from DNS. If the selector record carries the flag, it now has
4886 precedence over the domain-wide flag.
4888 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4890 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4891 the use of a port name that isn't defined in /etc/services) occurred, the
4892 message was deferred as in a normal delivery, and thus remained on the
4893 spool, instead of being failed because of the mua_wrapper setting. This
4894 is now fixed, and I tidied up some of the mua_wrapper messages at the
4897 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4898 the messages in a hash of arrays rather than using individual hashes.
4899 This is a bit cleaner and results in dramatic memory savings, albeit
4900 at a slight CPU cost.
4902 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4903 as requested by Marc Sherman.
4905 SC/10 Eximstats: added histograms for user specified patterns as requested
4908 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4910 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4911 fopen() in the content-scanning modules that did not already have it.
4917 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4918 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4920 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4922 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4924 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4925 to test Sieve filters that use "vacation".
4927 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4928 that changes the way the GnuTLS parameters are stored in the cache file.
4929 The new format can be generated externally. For backward compatibility,
4930 if the data in the cache doesn't make sense, Exim assumes it has read an
4931 old-format file, and it generates new data and writes a new file. This
4932 means that you can't go back to an older release without removing the
4935 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4936 work if there are any delivery delays because "one_time" forces the
4937 parent to be marked "delivered", so its unseen clone is never tried
4938 again. For this reason, Exim now forbids the simultaneous setting of
4941 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4942 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4943 entry if you want to know the details. The fix, however, neglected to
4944 consider the case when local delivery batching is involved. The test for
4945 "previously delivered" was not happening when checking to see if an
4946 address could be batched with a previous (undelivered) one; under
4947 certain circumstances this could lead to multiple deliveries to the same
4950 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4951 in its include files, and this causes problems building Exim.
4953 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4954 header_syntax) but Exim was just ignoring anything given after a slash.
4955 In particular, this caused confusion with an attempt to use "verify =
4956 reverse_host_lookup/defer_ok". An error is now given when options are
4957 supplied for verify items that do not have them. (Maybe reverse_host_
4958 lookup should have a defer_ok option, but that's a different point.)
4960 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4961 defined by RFC 821) to 2048, because there were problems with some AUTH
4962 commands, and RFC 1869 says the size should be increased for extended
4963 SMTP commands that take arguments.
4965 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4968 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4969 "unknown" error; now it says that the functionality isn't in the binary.
4971 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4972 an address' error message when a string expansion fails (syntax or
4973 whatever). Otherwise the password may appear in the log. Following change
4974 PH/42 below, there is no longer a chance of it appearing in a bounce
4977 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4979 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4980 of its addresses was ever tried. (Bugzilla bug #2.)
4982 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4983 the result incorrectly in the debug output. (It correctly added a newline
4984 to what was transported.)
4986 TF/01 Added $received_time.
4988 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4989 commented out examples of how to interface to a virus scanner and to
4990 SpamAssassin. Also added commented examples of av_scanner and
4991 spamd_address settings.
4993 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4994 and controls are allowed in which ACLs. There were a couple of minor
4995 errors. Some of the entries in the conditions table (which is a table of
4996 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4997 negation of where the condition IS allowed.
4999 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5001 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5002 header file does not have a version number, so I've had to invent a new
5003 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5004 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5005 radiusclient), but it was contributed by a Radius user.
5007 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5008 files or directories, for OpenSSL.
5010 PH/19 When an Exim process that is running as root has to create an Exim log
5011 file, it does so in a subprocess that runs as exim:exim so as to get the
5012 ownership right at creation (otherwise, other Exim processes might see
5013 the file with the wrong ownership). There was no test for failure of this
5014 fork() call, which would lead to the process getting stuck as it waited
5015 for a non-existent subprocess. Forks do occasionally fail when resources
5016 run out. I reviewed all the other calls to fork(); they all seem to check
5019 PH/20 When checking for unexpected SMTP input at connect time (before writing
5020 the banner), Exim was not dealing correctly with a non-positive return
5021 from the read() function. If the client had disconnected by this time,
5022 the result was a log entry for a synchronization error with an empty
5023 string after "input=" when read() returned zero. If read() returned -1
5024 (an event I could not check), uninitialized data bytes were printed.
5025 There were reports of junk text (parts of files, etc) appearing after
5028 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5030 PH/22 Added support for macro redefinition, and (re)definition in between
5031 driver and ACL definitions.
5033 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5034 forgetting to use the resulting value; it was using the unexpanded value.
5036 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5037 hadn't been configured. The fix is from Juergen Kreileder, who
5038 understands it better than I do:
5040 "Here's what I see happening with three configured cyrus_sasl
5041 authenticators configured (plain, login, cram-md5):
5043 On startup auth_cyrus_sasl_init() gets called for each of these.
5044 This means three calls to sasl_listmech() without a specified mech_list.
5045 => SASL tests which mechs of all available mechs actually work
5046 => three warnings about OTP not working
5047 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5049 With the patch, sasl_listmech() also gets called three times. But now
5050 SASL's mech_list option is set to the server_mech specified in the the
5051 authenticator. Or in other words, the answer from sasl_listmech()
5052 gets limited to just the mech you're testing for (which is different
5054 => the return list contains just 'plain' or 'login', 'cram-md5' or
5055 nothing depending on the value of ob->server_mech.
5057 I've just tested the patch: Authentication still works fine,
5058 unavailable mechs specified in the exim configuration are still
5059 caught, and the auth.log warnings about OTP are gone."
5061 PH/25 When debugging is enabled, the contents of the command line are added
5062 to the debugging output, even when log_selector=+arguments is not
5065 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5066 answer is "GNU", and only if the return is "GNU/something" is the answer
5069 PH/27 $acl_verify_message is now set immediately after the failure of a
5070 verification in an ACL, and so is available in subsequent modifiers. In
5071 particular, the message can be preserved by coding like this:
5073 warn !verify = sender
5074 set acl_m0 = $acl_verify_message
5076 Previously, $acl_verify_message was set only while expanding "message"
5077 and "log_message" when a very denied access.
5079 PH/28 Modified OS/os.c-Linux with
5081 -#ifndef OS_LOAD_AVERAGE
5082 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5084 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5085 nomenclature these days.)
5087 PH/29 Installed patch from the Sieve maintainer that adds the options
5088 sieve_useraddress and sieve_subaddress to the redirect router.
5090 PH/30 In these circumstances:
5091 . Two addresses routed to the same list of hosts;
5092 . First host does not offer TLS;
5093 . First host accepts first address;
5094 . First host gives temporary error to second address;
5095 . Second host offers TLS and a TLS session is established;
5096 . Second host accepts second address.
5097 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5098 and peerdn, if requested) that were in fact used only for the second
5101 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5102 attention to any local part prefix or suffix that was matched by the
5103 router that accepted the address. It now behaves in the same way as it
5104 does for delivery: the affixes are removed from the local part unless
5105 rcpt_include_affixes is set on the transport.
5107 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5108 timeout during the DATA phase of an incoming message.
5110 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5111 applied a patch sanctioned by the Sieve maintainer.
5113 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5114 the uid or gid is negative. A case of a negative gid caused this to be
5115 noticed. The fix allows for either to be negative.
5117 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5118 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5121 PH/36 The change PH/12 above was broken. Fixed it.
5123 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5124 the grounds that routing the same address twice would always produce the
5125 same answer. This might have been true once, but it is certainly no
5126 longer true now. Routing a child address may depend on the previous
5127 routing that produced that child. Some complicated redirection strategies
5128 went wrong when messages had multiple recipients, and made Exim's
5129 behaviour dependent on the order in which the addresses were given.
5131 I have moved the duplicate checking until after the routing is complete.
5132 Exim scans the addresses that are assigned to local and remote
5133 transports, and removes any duplicates. This means that more work will be
5134 done, as duplicates will always all be routed, but duplicates are
5135 presumably rare, so I don't expect this is of any significance.
5137 For deliveries to pipes, files, and autoreplies, the duplicate checking
5138 still happens during the routing process, since they are not going to be
5141 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5142 It corrects a timeout issue with spamd. This is Ian's comment: "The
5143 background is that sometimes spamd either never reads data from a
5144 connection it has accepted, or it never writes response data. The exiscan
5145 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5146 blindly assumes that writes won't block so it may never time out."
5148 PH/39 Allow G after quota size as well as K and M.
5150 PH/40 The value set for $authenticated_id in an authenticator may not contain
5151 binary zeroes or newlines because the value is written to log lines and
5152 to spool files. There was no check on this. Now the value is run through
5153 the string_printing() function so that such characters are converted to
5154 printable escape sequences.
5156 PH/41 $message_linecount is a new variable that contains the total number of
5157 lines in the message. Compare $body_linecount, which is the count for the
5160 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5161 bounce and delay warning messages, except in certain special cases, which
5164 (a) An SMTP error message from a remote host;
5165 (b) A message specified in a :fail: redirection;
5166 (c) A message specified in a "fail" command in a system filter;
5167 (d) A message specified in a FAIL return from the queryprogram router;
5168 (e) A message specified by the cannot_route_message router option.
5170 In these cases only, Exim does include the error details in bounce and
5171 warning messages. There are also a few cases where bland messages such
5172 as "unrouteable address" or "local delivery error" are given.
5174 PH/43 $value is now also set for the "else" part of a ${run expansion.
5176 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5177 being worked on, but at least Exim now implements the latest version to
5180 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5181 process to complete was treated as a delivery failure, a timeout while
5182 writing the message to the pipe was logged, but erroneously treated as a
5183 successful delivery. Such timeouts include transport filter timeouts. For
5184 consistency with the overall process timeout, these timeouts are now
5185 treated as errors, giving rise to delivery failures by default. However,
5186 there is now a new Boolean option for the pipe transport called
5187 timeout_defer, which, if set TRUE, converts the failures into defers for
5188 both kinds of timeout. A transport filter timeout is now identified in
5191 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5192 systems where "make" and "gmake" are different, calling "gmake" at top
5193 level broke things. I've arranged for the value of $(MAKE) to be passed
5194 from the Makefile to this script so that it can call the same version of
5198 A note about Exim versions 4.44 and 4.50
5199 ----------------------------------------
5201 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5202 changes of various kinds. As a consequence, a big documentation update was
5203 needed. This delayed the release for rather longer than seemed good, especially
5204 in the light of a couple of (minor) security issues. Therefore, the changes
5205 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5206 release. So 4.44 and 4.50 are in effect two different branches that both start
5209 I have left the 4.50 change log unchanged; it contains all the changes since
5210 4.43. The change log for 4.44 is below; many of its items are identical to
5211 those for 4.50. This seems to be the most sensible way to preserve the
5212 historical information.
5218 1. Minor wording change to the doc/README.SIEVE file.
5220 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5221 computation of the current number of files was incorrect.
5223 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5224 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5227 4. Give more explanation in the error message when the command for a transport
5228 filter fails to execute.
5230 5. There are several places where Exim runs a non-Exim command in a
5231 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5232 was being done only for the command run by the queryprogram router. It is
5233 now done for all such subprocesses. The other cases are: ${run, transport
5234 filters, and the commands run by the lmtp and pipe transports.
5236 6. Added CONFIGURE_GROUP build-time option.
5238 7. Some older OS have a limit of 256 on the maximum number of file
5239 descriptors. Exim was using setrlimit() to set 1000 as a large value
5240 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5241 systems. I've change it so that if it can't get 1000, it tries for 256.
5243 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5244 was an oversight, and furthermore, ever since the addition of extra
5245 controls (e.g. 4.43/32), the checks on when to allow different forms of
5246 "control" were broken. There should now be diagnostics for all cases when a
5247 control that does not make sense is encountered.
5249 9. Added the /retain_sender option to "control=submission".
5251 10. $recipients is now available in the predata ACL (oversight).
5253 11. Tidy the search cache before the fork to do a delivery from a message
5254 received from the command line. Otherwise the child will trigger a lookup
5255 failure and thereby defer the delivery if it tries to use (for example) a
5256 cached ldap connection that the parent has called unbind on.
5258 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5259 of $address_data from the recipient verification was clobbered by the
5260 sender verification.
5262 13. The value of address_data from a sender verification is now available in
5263 $sender_address_data in subsequent conditions in the ACL statement.
5265 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5267 15. Added a new option "connect=<time>" to callout options, to set a different
5270 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5271 was its contents. (It was OK if the option was not defined at all.)
5273 17. A "Completed" log line is now written for messages that are removed from
5274 the spool by the -Mrm option.
5276 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5277 information about exactly what failed.
5279 19. Added -dd to debug only the daemon process.
5281 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5282 handles timeouts, both on the server side and network timeouts. Renamed the
5283 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5285 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5286 It is now set to "smtps".
5288 22. $host_address is now set to the target address during the checking of
5289 ignore_target_hosts.
5291 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5292 being passed; this would have caused $sender_host_name to have been used if
5293 matching the list had actually called for a host name (not very likely,
5294 since this list is usually IP addresses). A host name is now passed as
5297 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5298 code that specifies a non-restarting handler (typically sigaction() in
5299 modern systems) in an attempt to fix a rare and obscure crash bug.
5301 25. Narrowed the window for a race in the daemon that could cause it to ignore
5302 SIGCHLD signals. This is not a major problem, because they are used only to
5303 wake it up if nothing else does.
5305 26. A malformed maildirsize file could cause Exim to calculate negative values
5306 for the mailbox size or file count. Odd effects could occur as a result.
5307 The maildirsize information is now recalculated if the size or filecount
5310 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5311 support for a long time. Removed HAVE_SYS_VFS_H.
5313 28. Installed the latest version of exipick from John Jetmore.
5315 29. In an address list, if the pattern was not a regular expression, an empty
5316 subject address (from a bounce message) matched only if the pattern was an
5317 empty string. Non-empty patterns were not even tested. This was the wrong
5318 because it is perfectly reasonable to use an empty address as part of a
5319 database query. An empty address is now tested by patterns that are
5320 lookups. However, all the other forms of pattern expect the subject to
5321 contain a local part and a domain, and therefore, for them, an empty
5322 address still always fails if the pattern is not itself empty.
5324 30. Exim went into a mad DNS loop when attempting to do a callout where the
5325 host was specified on an smtp transport, and looking it up yielded more
5326 than one IP address.
5328 31. Re-factored the code for checking spool and log partition space into a
5329 function that finds that data and another that does the check. The former
5330 is then used to implement four new variables: $spool_space, $log_space,
5331 $spool_inodes, and $log_inodes.
5333 32. The RFC2047 encoding function was originally intended for short strings
5334 such as real names; it was not keeping to the 75-character limit for
5335 encoded words that the RFC imposes. It now respects the limit, and
5336 generates multiple encoded words if necessary. To be on the safe side, I
5337 have increased the buffer size for the ${rfc2047: expansion operator from
5340 33. It is now permitted to omit both strings after an "if" condition; if the
5341 condition is true, the result is "true". As before, when the second string
5342 is omitted, a false condition yields an empty string. This makes it less
5343 cumbersome to write custom ACL and router conditions.
5345 34. Failure to deliver a bounce message always caused it to be frozen, even if
5346 there was an errors_to setting on the router. The errors_to setting is now
5349 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5350 canonical form (fully expanded) before being placed in
5351 $sender_host_address.
5353 36. The table in the code that translates DNS record types into text (T_A to
5354 "A" for instance) was missing entries for NS and CNAME. It is just possible
5355 that this could have caused confusion if both these types were looked up
5356 for the same domain, because the text type is used as part of Exim's
5357 per-process caching. But the chance of anyone hitting this buglet seems
5360 37. The dnsdb lookup has been extended in a number of ways.
5362 (1) There is a new type, "zns", which walks up the domain tree until it
5363 finds some nameserver records. It should be used with care.
5365 (2) There is a new type, "mxh", which is like "mx" except that it returns
5366 just the host names, not the priorities.
5368 (3) It is now possible to give a list of domains (or IP addresses) to be
5369 looked up. The behaviour when one of the lookups defers can be
5370 controlled by a keyword.
5372 (4) It is now possible to specify the separator character for use when
5373 multiple records are returned.
5375 38. The dnslists ACL condition has been extended: it is now possible to supply
5376 a list of IP addresses and/or domains to be looked up in a particular DNS
5379 39. Added log_selector=+queue_time_overall.
5381 40. When running the queue in the test harness, wait just a tad after forking a
5382 delivery process, to get repeatability of debugging output.
5384 41. Include certificate and key file names in error message when GnuTLS fails
5385 to set them up, because the GnuTLS error message doesn't include the name
5386 of the failing file when there is a problem reading it.
5388 42. Allow both -bf and -bF in the same test run.
5390 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5392 44. The "Exiscan patch" is now merged into the mainline Exim source.
5394 45. Sometimes the final signoff response after QUIT could fail to get
5395 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5396 < 0 before doing a fflush(). This bug looks as though it goes back to the
5397 introduction of TLS in release 3.20, but "sometimes" must have been rare
5398 because the tests only now provoked it.
5400 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5401 (this can affect the format of dates).
5403 47. exim_tidydb, when checking for the continued existence of a message for
5404 which it has found a message-specific retry record, was not finding
5405 messages that were in split spool directories. Consequently, it was
5406 deleting retry records that should have stayed in existence.
5408 48. Steve fixed some bugs in eximstats.
5410 49. The SPA authentication driver was not abandoning authentication and moving
5411 on to the next authenticator when an expansion was forced to fail,
5412 contradicting the general specification for all authenticators. Instead it
5413 was generating a temporary error. It now behaves as specified.
5415 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5416 (the order specifies the preference for clients). The order is now AES256,
5417 AES128, 3DES, ARCFOUR128.
5419 51. Small patch to Sieve code - explicitly set From: when generating an
5422 52. Exim crashed if a remote delivery caused a very long error message to be
5423 recorded - for instance if somebody sent an entire SpamAssassin report back
5424 as a large number of 550 error lines. This bug was coincidentally fixed by
5425 increasing the size of one of Exim's internal buffers (big_buffer) that
5426 happened as part of the Exiscan merge. However, to be on the safe side, I
5427 have made the code more robust (and fixed the comments that describe what
5430 53. Now that there can be additional text after "Completed" in log lines (if
5431 the queue_time_overall log selector is set), a one-byte patch to exigrep
5432 was needed to allow it to recognize "Completed" as not the last thing in
5435 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5436 patch that reportedly fixes this has been added. I am not expert enough to
5437 create a test for it. This is what the patch creator wrote:
5439 "I found a little strange behaviour of ldap code when working with
5440 Windows 2003 AD Domain, where users was placed in more than one
5441 Organization Units. When I tried to give exim partial DN, the exit code
5442 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5443 But simultaneously result of request was absolutely normal ldap result,
5444 so I produce this patch..."
5446 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5447 REFERENCE, so I have modified the code to exclude the patch when that macro
5450 55. Some experimental protocols are using DNS PTR records for new purposes. The
5451 keys for these records are domain names, not reversed IP addresses. The
5452 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5453 leaves it alone. Component reversal etc. now happens only for IP addresses.
5456 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5458 57. Double the size of the debug message buffer (to 2048) so that more of very
5459 long debug lines gets shown.
5461 58. The exicyclog utility now does better if the number of log files to keep
5462 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5464 59. Two changes related to the smtp_active_hostname option:
5466 (1) $smtp_active_hostname is now available as a variable.
5467 (2) The default for smtp_banner uses $smtp_active_hostname instead
5468 of $primary_hostname.
5470 60. The host_aton() function is supposed to be passed a string that is known
5471 to be a valid IP address. However, in the case of IPv6 addresses, it was
5472 not checking this. This is a hostage to fortune. Exim now panics and dies
5473 if the condition is not met. A case was found where this could be provoked
5474 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5475 components; fortuitously, this particular loophole had already been fixed
5476 by change 4.50/55 above.
5478 If there are any other similar loopholes, the new check in host_aton()
5479 itself should stop them being exploited. The report I received stated that
5480 data on the command line could provoke the exploit when Exim was running as
5481 exim, but did not say which command line option was involved. All I could
5482 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5483 running as the user.
5486 61. There was a buffer overflow vulnerability in the SPA authentication code
5487 (which came originally from the Samba project). I have added a test to the
5488 spa_base64_to_bits() function which I hope fixes it.
5491 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5492 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5494 63. The daemon start-up calls getloadavg() while still root for those OS that
5495 need the first call to be done as root, but it missed one case: when
5496 deliver_queue_load_max is set with deliver_drop_privilege. This is
5497 necessary for the benefit of the queue runner, because there is no re-exec
5498 when deliver_drop_privilege is set.
5500 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5501 This has been fixed.
5503 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5504 was in use, was not putting the data itself into the right store pool;
5505 consequently, it could be overwritten for a subsequent message in the same
5506 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5509 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5511 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5512 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5513 the function were treating the return as a boolean value, which happened to
5514 work because 0=false and not-0=true, but is not correct code.
5516 68. The host_aton() function was not handling scoped IPv6 addresses (those
5517 with, for example, "%eth0" on the end) correctly.
5519 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5520 negated items (that is, ~something) in unsigned ints. Some compilers
5521 apparently mutter when there is no cast.
5523 70. If an address verification called from an ACL failed, and did not produce a
5524 user-specific message (i.e. there was only a "system" message), nothing was
5525 put in $acl_verify_message. In this situation, it now puts the system
5528 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5529 session; change 4.31/43 added the unwanted input to the log line - except
5530 that it did not do this in the start of session case. It now does.
5532 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5533 This is wrong and can cause the other end to generate a synchronization
5534 error if it is another Exim or anything else that does the synchronization
5535 check. A QUIT command is no longer sent after a timeout.
5537 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5538 during host lookups.
5540 74. The defer_ok option of callout verification was not working if it was used
5541 when verifying addresses in header lines, that is, for this case:
5543 verify = header_sender/callout=defer_ok
5545 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5546 those file descriptors could be used for SMTP connections. If anything
5547 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5548 could be sent to the SMTP client, causing chaos. The daemon now opens
5549 stdin, stdout, and stderr to /dev/null when it puts itself into the
5552 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5553 log by default. The user can override this with suitable Perl magic.
5555 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5556 the log message when discard triggers, was not working for the DATA ACL or
5557 for the non-SMTP ACL.
5559 78. Error message wording change in sieve.c.
5561 79. If smtp_accept_max_per_host was set, the number of connections could be
5562 restricted to fewer than expected, because the daemon was trying to set up
5563 a new connection before checking whether the processes handling previous
5564 connections had finished. The check for completed processes is now done
5565 earlier. On busy systems, this bug wouldn't be noticed because something
5566 else would have woken the daemon, and it would have reaped the completed
5569 80. If a message was submitted locally by a user whose login name contained one
5570 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5571 It caused a spool format error. I have fixed the spool reading code. A
5572 related problem was that the "from" clause in the Received: line became
5573 illegal because of the space(s). It is now covered by ${quote_local_part.
5575 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5578 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5580 83. Patch from Sieve maintainer to fix unterminated string problem in
5581 "vacation" handling.
5583 84. Some minor changes to the Linux configuration files to help with other
5584 OS variants using glibc.
5586 85. One more patch for Sieve to update vacation handling to latest spec.
5589 ----------------------------------------------------
5590 See the note above about the 4.44 and 4.50 releases.
5591 ----------------------------------------------------
5597 1. Change 4.43/35 introduced a bug that caused file counts to be
5598 incorrectly computed when quota_filecount was set in an appendfile
5601 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5602 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5605 3. Give more explanation in the error message when the command for a transport
5606 filter fails to execute.
5608 4. There are several places where Exim runs a non-Exim command in a
5609 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5610 was being done only for the command run by the queryprogram router. It is
5611 now done for all such subprocesses. The other cases are: ${run, transport
5612 filters, and the commands run by the lmtp and pipe transports.
5614 5. Some older OS have a limit of 256 on the maximum number of file
5615 descriptors. Exim was using setrlimit() to set 1000 as a large value
5616 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5617 systems. I've change it so that if it can't get 1000, it tries for 256.
5619 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5620 was an oversight, and furthermore, ever since the addition of extra
5621 controls (e.g. 4.43/32), the checks on when to allow different forms of
5622 "control" were broken. There should now be diagnostics for all cases when a
5623 control that does not make sense is encountered.
5625 7. $recipients is now available in the predata ACL (oversight).
5627 8. Tidy the search cache before the fork to do a delivery from a message
5628 received from the command line. Otherwise the child will trigger a lookup
5629 failure and thereby defer the delivery if it tries to use (for example) a
5630 cached ldap connection that the parent has called unbind on.
5632 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5633 of $address_data from the recipient verification was clobbered by the
5634 sender verification.
5636 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5637 was its contents. (It was OK if the option was not defined at all.)
5639 11. A "Completed" log line is now written for messages that are removed from
5640 the spool by the -Mrm option.
5642 12. $host_address is now set to the target address during the checking of
5643 ignore_target_hosts.
5645 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5646 being passed; this would have caused $sender_host_name to have been used if
5647 matching the list had actually called for a host name (not very likely,
5648 since this list is usually IP addresses). A host name is now passed as
5651 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5652 code that specifies a non-restarting handler (typically sigaction() in
5653 modern systems) in an attempt to fix a rare and obscure crash bug.
5655 15. Narrowed the window for a race in the daemon that could cause it to ignore
5656 SIGCHLD signals. This is not a major problem, because they are used only to
5657 wake it up if nothing else does.
5659 16. A malformed maildirsize file could cause Exim to calculate negative values
5660 for the mailbox size or file count. Odd effects could occur as a result.
5661 The maildirsize information is now recalculated if the size or filecount
5664 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5665 support for a long time. Removed HAVE_SYS_VFS_H.
5667 18. Updated exipick to current release from John Jetmore.
5669 19. Allow an empty sender to be matched against a lookup in an address list.
5670 Previously the only cases considered were a regular expression, or an
5673 20. Exim went into a mad DNS lookup loop when doing a callout where the
5674 host was specified on the transport, if the DNS lookup yielded more than
5677 21. The RFC2047 encoding function was originally intended for short strings
5678 such as real names; it was not keeping to the 75-character limit for
5679 encoded words that the RFC imposes. It now respects the limit, and
5680 generates multiple encoded words if necessary. To be on the safe side, I
5681 have increased the buffer size for the ${rfc2047: expansion operator from
5684 22. Failure to deliver a bounce message always caused it to be frozen, even if
5685 there was an errors_to setting on the router. The errors_to setting is now
5688 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5689 canonical form (fully expanded) before being placed in
5690 $sender_host_address.
5692 24. Updated eximstats to version 1.33
5694 25. Include certificate and key file names in error message when GnuTLS fails
5695 to set them up, because the GnuTLS error message doesn't include the name
5696 of the failing file when there is a problem reading it.
5698 26. Expand error message when OpenSSL has problems setting up cert/key files.
5701 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5702 (this can affect the format of dates).
5704 28. exim_tidydb, when checking for the continued existence of a message for
5705 which it has found a message-specific retry record, was not finding
5706 messages that were in split spool directories. Consequently, it was
5707 deleting retry records that should have stayed in existence.
5709 29. eximstats updated to version 1.35
5710 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5711 1.35 - bugfix such that pie charts by volume are generated correctly
5713 30. The SPA authentication driver was not abandoning authentication and moving
5714 on to the next authenticator when an expansion was forced to fail,
5715 contradicting the general specification for all authenticators. Instead it
5716 was generating a temporary error. It now behaves as specified.
5718 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5719 (the order specifies the preference for clients). The order is now AES256,
5720 AES128, 3DES, ARCFOUR128.
5722 31. Small patch to Sieve code - explicitly set From: when generating an
5725 32. Exim crashed if a remote delivery caused a very long error message to be
5726 recorded - for instance if somebody sent an entire SpamAssassin report back
5727 as a large number of 550 error lines. This bug was coincidentally fixed by
5728 increasing the size of one of Exim's internal buffers (big_buffer) that
5729 happened as part of the Exiscan merge. However, to be on the safe side, I
5730 have made the code more robust (and fixed the comments that describe what
5733 33. Some experimental protocols are using DNS PTR records for new purposes. The
5734 keys for these records are domain names, not reversed IP addresses. The
5735 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5736 leaves it alone. Component reversal etc. now happens only for IP addresses.
5739 34. The host_aton() function is supposed to be passed a string that is known
5740 to be a valid IP address. However, in the case of IPv6 addresses, it was
5741 not checking this. This is a hostage to fortune. Exim now panics and dies
5742 if the condition is not met. A case was found where this could be provoked
5743 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5744 components; fortuitously, this particular loophole had already been fixed
5745 by change 4.50/55 or 4.44/33 above.
5747 If there are any other similar loopholes, the new check in host_aton()
5748 itself should stop them being exploited. The report I received stated that
5749 data on the command line could provoke the exploit when Exim was running as
5750 exim, but did not say which command line option was involved. All I could
5751 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5752 running as the user.
5755 35. There was a buffer overflow vulnerability in the SPA authentication code
5756 (which came originally from the Samba project). I have added a test to the
5757 spa_base64_to_bits() function which I hope fixes it.
5760 36. The daemon start-up calls getloadavg() while still root for those OS that
5761 need the first call to be done as root, but it missed one case: when
5762 deliver_queue_load_max is set with deliver_drop_privilege. This is
5763 necessary for the benefit of the queue runner, because there is no re-exec
5764 when deliver_drop_privilege is set.
5766 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5767 was in use, was not putting the data itself into the right store pool;
5768 consequently, it could be overwritten for a subsequent message in the same
5769 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5772 38. Sometimes the final signoff response after QUIT could fail to get
5773 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5774 < 0 before doing a fflush(). This bug looks as though it goes back to the
5775 introduction of TLS in release 3.20, but "sometimes" must have been rare
5776 because the tests only now provoked it.
5782 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5783 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5784 Now it returns an integer. A number of calls were still expecting a T/F
5785 return. Fortuitously, in all cases, the tests worked in OK situations,
5786 which is the norm. However, things would have gone wrong on any write
5787 failures on the smtp file descriptor. This function is used when sending
5788 messages over SMTP and also when doing verify callouts.
5790 2. When Exim is called to do synchronous delivery of a locally submitted
5791 message (the -odf or -odi options), it no longer closes stderr before doing
5794 3. Implemented the mua_wrapper option.
5796 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5798 5. Implemented the functions header_remove(), header_testname(),
5799 header_add_at_position(), and receive_remove_recipient(), and exported them
5802 6. If an ACL "warn" statement specified the addition of headers, Exim already
5803 inserted X-ACL-Warn: at the start if there was no header name. However, it
5804 was not making this test for the second and subsequent header lines if
5805 there were newlines in the string. This meant that an invalid header could
5806 be inserted if Exim was badly configured.
5808 7. Allow an ACL "warn" statement to add header lines at the start or after all
5809 the Received: headers, as well as at the end.
5811 8. Added the rcpt_4xx retry error code.
5813 9. Added postmaster_mailfrom=xxx to callout verification option.
5815 10. Added mailfrom=xxxx to the callout verification option, for verify=
5818 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5819 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5821 12. Inserted some casts to stop certain compilers warning when using pointer
5822 differences as field lengths or precisions in printf-type calls (mostly
5823 affecting debugging statements).
5825 13. Added optional readline() support for -be (dynamically loaded).
5827 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5828 same clock tick as a message's arrival, so that its received time was the
5829 same as the "first fail" time on the retry record, and that message
5830 remained on the queue past the ultimate address timeout, every queue runner
5831 would try a delivery (because it was past the ultimate address timeout) but
5832 after another failure, the ultimate address timeout, which should have then
5833 bounced the address, did not kick in. This was a "< instead of <=" error;
5834 in most cases the first failure would have been in the next clock tick
5835 after the received time, and all would be well.
5837 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5838 being recognized when the domain list was tested by the match_domain
5839 condition in an expansion string.
5841 16. Added the ${str2b64: operator.
5843 17. Exim was always calling setrlimit() to set a large limit for the number of
5844 processes, without checking whether the existing limit was already
5845 adequate. (It did check for the limit on file descriptors.) Furthermore,
5846 errors from getrlimit() and setrlimit() were being ignored. Now they are
5847 logged to the main and panic logs, but Exim does carry on, to try to do its
5848 job under whatever limits there are.
5850 18. Imported PCRE 5.0.
5852 19. Trivial typo in log message " temporarily refused connection" (the leading
5855 20. If the log selector return_path_on_delivery was set and an address was
5856 redirected to /dev/null, the delivery process crashed because it assumed
5857 that a return path would always be set for a "successful" delivery. In this
5858 case, the whole delivery is bypassed as an optimization, and therefore no
5861 21. Internal re-arrangement: the function for sending a challenge and reading
5862 a response while authentication was assuming a zero-terminated challenge
5863 string. It's now changed to take a pointer and a length, to allow for
5864 binary data in such strings.
5866 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5868 23. Exim was not respecting finduser_retries when seeking the login of the
5869 uid under which it was called; it was always trying 10 times. (The default
5870 setting of finduser_retries is zero.) Also, it was sleeping after the final
5871 failure, which is pointless.
5873 24. Implemented tls_on_connect_ports.
5875 25. Implemented acl_smtp_predata.
5877 26. If the domain in control=submission is set empty, Exim assumes that the
5878 authenticated id is a complete email address when it generates From: or
5879 Sender: header lines.
5881 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5882 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5883 chown and chgrp in /bin and hostname in /usr/bin.
5885 28. Exim was keeping the "process log" file open after each use, just as it
5886 does for the main log. This opens the possibility of it remaining open for
5887 long periods when the USR1 signal hits a daemon. Occasional processlog
5888 errors were reported, that could have been caused by this. Anyway, it seems
5889 much more sensible not to leave this file open at all, so that is what now
5892 29. The long-running daemon process does not normally write to the log once it
5893 has entered its main loop, and it closes the log before doing so. This is
5894 so that log files can straightforwardly be renamed and moved. However,
5895 there are a couple of unusual error situations where the daemon does write
5896 log entries, and I had neglected to close the log afterwards.
5898 30. The text of an SMTP error response that was received during a remote
5899 delivery was being truncated at 512 bytes. This is too short for some of
5900 the long messages that one sometimes sees. I've increased the limit to
5903 31. It is now possible to make retry rules that apply only when a message has a
5904 specific sender, in particular, an empty sender.
5906 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5907 it possible to be selective about when SMTP synchronization is enforced.
5909 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5911 32. Implemented hosts_connection_nolog.
5913 33. Added an ACL for QUIT.
5915 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5918 35. Added mailbox_size and mailbox_filecount to appendfile.
5920 36. Added control = no_multiline_responses to ACLs.
5922 37. There was a bug in the logic of the code that waits for the clock to tick
5923 in the case where the clock went backwards by a substantial amount such
5924 that the microsecond fraction of "now" was more than the microsecond
5925 fraction of "then" (but the whole seconds number was less).
5927 38. Added support for the libradius Radius client library this is found on
5928 FreeBSD (previously only the radiusclient library was supported).
5934 1. When certain lookups returned multiple values in the form name=value, the
5935 quoting of the values was not always being done properly. Specifically:
5936 (a) If the value started with a double quote, but contained no whitespace,
5938 (b) If the value contained whitespace other than a space character (i.e.
5939 tabs or newlines or carriage returns) it was not quoted.
5940 This fix has been applied to the mysql and pgsql lookups by writing a
5941 separate quoting function and calling it from the lookup code. The fix
5942 should probably also be applied to nisplus, ibase and oracle lookups, but
5943 since I cannot test any of those, I have not disturbed their existing code.
5945 2. A hit in the callout cache for a specific address caused a log line with no
5946 reason for rejecting RCPT. Now it says "Previous (cached) callout
5947 verification failure".
5949 3. There was an off-by-one bug in the queryprogram router. An over-long
5950 return line was truncated at 256 instead of 255 characters, thereby
5951 overflowing its buffer with the terminating zero. As well as fixing this, I
5952 have increased the buffer size to 1024 (and made a note to document this).
5954 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5955 when Exim is waiting for an SMTP response from a remote server, Exim
5956 restarts its select() call on the socket, thereby resetting its timeout.
5957 This is not a problem when such interrupts are rare. Somebody set up a cron
5958 job to run exiwhat every 2 minutes, which is less than the normal select()
5959 timeout (5 or 10 minutes). This meant that the select() timeout never
5960 kicked in because it was always reset. I have fixed this by comparing the
5961 time when an interrupt arrives with the time at the start of the first call
5962 to select(). If more time than the timeout has elapsed, the interrupt is
5963 treated as a timeout.
5965 5. Some internal re-factoring in preparation for the addition of Sieve
5966 extensions (by MH). In particular, the "personal" test is moved to a
5967 separate function, and given an option for scanning Cc: and Bcc: (which is
5968 not set for Exim filters).
5970 6. When Exim created an email address using the login of the caller as the
5971 local part (e.g. when creating a From: or Sender: header line), it was not
5972 quoting the local part when it contained special characters such as @.
5974 7. Installed new OpenBSD configuration files.
5976 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5977 try to make them clearer.
5979 9. Callout options, other than the timeout value, were being ignored when
5980 verifying sender addresses in header lines. For example, when using
5982 verify = header_sender/callout=no_cache
5984 the cache was (incorrectly) being used.
5986 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5987 only the Cygwin environment.
5989 11. When return_path_on_delivery was set as a log selector, if different remote
5990 addresses in the same message used different return paths and parallel
5991 remote delivery occurred, the wrong values would sometimes be logged.
5992 (Whenever a remote delivery process finished, the return path value from
5993 the most recently started remote delivery process was logged.)
5995 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5996 lines when AUTH and/or TLS are in use. This is the "received protocol"
5997 field. Exim used to use "asmtp" for authenticated SMTP, without any
5998 indication (in the protocol name) for TLS use. Now it follows the RFC and
5999 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6000 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6001 names appear in log lines as well as in Received: header lines.
6003 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6004 extensions, and comparison tests, and to fix some bugs.
6006 14. Changes to the "personal" filter test:
6008 (1) The test was buggy in that it was just doing the equivalent of
6009 "contains" tests on header lines. For example, if a user's address was
6010 anne@some.where, the "personal" test would incorrectly be true for
6012 To: susanne@some.where
6014 This test is now done by extracting each address from the header in turn,
6015 and checking the entire address. Other tests that are part of "personal"
6016 are now done using regular expressions (for example, to check local parts
6017 of addresses in From: header lines).
6019 (2) The list of non-personal local parts in From: addresses has been
6020 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6021 taken from the Sieve specification recommendations.
6023 (3) If the message contains any header line starting with "List-" it is
6024 treated as non-personal.
6026 (4) The test for "circular" in the Subject: header line has been removed
6027 because it now seems ill-conceived.
6029 15. Minor typos in src/EDITME comments corrected.
6031 16. Installed latest exipick from John Jetmore.
6033 17. If headers_add on a router specified a text string that was too long for
6034 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6035 of string_sprintf() is now avoided.
6037 18. $message_body_size was not set (it was always zero) when running the DATA
6038 ACL and the local_scan() function.
6040 19. For the "mail" command in an Exim filter, no default was being set for
6041 the once_repeat time, causing a random time value to be used if "once" was
6042 specified. (If the value happened to be <= 0, no repeat happened.) The
6043 default is now 0s, meaning "never repeat". The "vacation" command was OK
6044 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6045 (I found it when inspecting the code).
6047 20. There is now an overall timeout for performing a callout verification. It
6048 defaults to 4 times the callout timeout, which applies to individual SMTP
6049 commands during the callout. The overall timeout applies when there is more
6050 than one host that can be tried. The timeout is checked before trying the
6051 next host. This prevents very long delays if there are a large number of
6052 hosts and all are timing out (e.g. when the network connections are timing
6053 out). The value of the overall timeout can be changed by specifying an
6054 additional sub-option for "callout", called "maxwait". For example:
6056 verify = sender/callout=5s,maxwait=20s
6058 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6059 to the end before writing, but this should make it even safer).
6061 22. Exim was forgetting that it had advertised PIPELINING for the second and
6062 subsequent messages on an SMTP connection. It was also not resetting its
6063 memory on STARTTLS and an internal HELO.
6065 23. When Exim logs an SMTP synchronization error within a session, it now
6066 records whether PIPELINING has been advertised or not.
6068 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6069 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6070 rather than long int.
6072 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6074 26. Added the never_mail option to autoreply.
6080 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6081 crash if the getsockname() call failed; this can happen if a connection is
6082 closed very soon after it is established. The problem was simply in the
6083 order in which certain operations were done, causing Exim to try to write
6084 to the SMTP stream before it had set up the file descriptor. The bug has
6085 been fixed by making things happen in the correct order.
6091 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6092 before the connection was closed, thus losing the rejection response.
6094 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6095 some early Solaris releases, but causes trouble in current releases where
6096 socklen_t is defined.
6098 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6101 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6104 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6105 that releasing the top of it at the end releases what was used for sub-
6106 expansions (unless the block got too big). However, discard this block if
6107 the first thing is a variable or header, so that we can use its block when
6108 it is dynamic (useful for very large $message_headers, for example).
6110 6. Lookups now cache *every* query, not just the most recent. A new, separate
6111 store pool is used for this. It can be recovered when all lookup caches are
6112 flushed. Lookups now release memory at the end of their result strings.
6113 This has involved some general refactoring of the lookup sources.
6115 7. Some code has been added to the store_xxx() functions to reduce the amount
6116 of flapping under certain conditions.
6118 8. log_incoming_interface used to affect only the <= reception log lines. Now
6119 it causes the local interface and port to be added to several more SMTP log
6120 lines, for example "SMTP connection from", and rejection lines.
6122 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6124 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6126 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6127 could be overwritten at the end of the current message (or the start of a
6128 new message if it was set in a HELO ACL). The value is now preserved for
6129 the duration of the SMTP connection.
6131 12. If a transport had a headers_rewrite setting, and a matching header line
6132 contained an unqualified address, that address was qualified, even if it
6133 did not match any rewriting rules. The underlying bug was that the values
6134 of the flags that permit the existence of unqualified sender and recipient
6135 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6136 non-local messages, and by -bnq for local messages) were not being
6137 preserved with the message after it was received.
6139 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6140 "next input=" as part of the text comprising the host identity instead of
6141 the correct text. The code was using the same buffer for two different
6142 strings. However, depending on which order the printing function evaluated
6143 its arguments, the bug did not always show up. Under Linux, for example, my
6144 test suite worked just fine.
6146 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6147 doesn't work with some older versions of Perl. It has been changed to "my",
6148 which in any case is probably the better facility to use.
6150 15. A really picky compiler found some instances of statements for creating
6151 error messages that either had too many or two few arguments for the format
6154 16. The size of the buffer for calls to the DNS resolver has been increased
6155 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6156 for addresses that have a lot of PTR records. This alleviates a problem; it
6157 does not fully solve it.
6159 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6160 buffer now truncates the list and logs the incident, which is the same
6161 action as happens when Exim is looking up a host name and its aliases.
6162 Previously in this situation something unpredictable would happen;
6163 sometimes it was "internal error: store_reset failed".
6165 18. If a server dropped the connection unexpectedly when an Exim client was
6166 using GnuTLS and trying to read a response, the client delivery process
6167 crashed while trying to generate an error log message.
6169 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6170 string, for example:
6172 warn message = H1: something\nH2: something
6174 the text was added as a single header line from Exim's point of view
6175 though it ended up OK in the delivered message. However, searching for the
6176 second and subsequent header lines using $h_h2: did not work. This has been
6177 fixed. Similarly, if a system filter added multiple headers in this way,
6178 the routers could not see them.
6180 20. Expanded the error message when iplsearch is called with an invalid key to
6181 suggest using net-iplsearch in a host list.
6183 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6184 ACLs are no longer actually imposed (and a message to that effect is
6187 22. If a "gecos" field in a passwd entry contained escaped characters, in
6188 particular, if it contained a \" sequence, Exim got it wrong when building
6189 a From: or a Sender: header from that name. A second bug also caused
6190 incorrect handling when an unquoted " was present following a character
6191 that needed quoting.
6193 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6194 was not being matched caselessly.
6196 24. Arranged for all hyphens in the exim.8 source to be escaped with
6199 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6200 properly. Recipient callout cache records were still being keyed to include
6201 the sender, even when use_sender was set false. This led to far more
6202 callouts that were necessary. The sender is no longer included in the key
6203 when use_sender is false.
6205 26. Added "control = submission" modifier to ACLs.
6207 27. Added the ${base62d: operator to decode base 62 numbers.
6209 28. dnsdb lookups can now access SRV records.
6211 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6212 the configuration file.
6214 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6215 (-v) mode. This makes the output for a verbose queue run more intelligible.
6217 31. Added a use_postmaster feature to recipient callouts.
6219 32. Added the $body_zerocount variable, containing the number of binary zero
6220 bytes in the message body.
6222 33. The time of last modification of the "new" subdirectory is now used as the
6223 "mailbox time last read" when there is a quota error for a maildir
6226 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6228 35. Added +ignore_unknown as a special item in host lists.
6230 36. Code for decoding IPv6 addresses in host lists is now included, even if
6231 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6232 address was recognized as an IP address, but was then not correctly decoded
6233 into binary, causing unexpected and incorrect effects when compared with
6240 1. Very minor rewording of debugging text in manualroute to say "list of
6241 hosts" instead of "hostlist".
6243 2. If verify=header_syntax was set, and a header line with an unqualified
6244 address (no domain) and a large number of spaces between the end of the
6245 name and the colon was received, the reception process suffered a buffer
6246 overflow, and (when I tested it) crashed. This was caused by some obsolete
6247 code that should have been removed. The fix is to remove it!
6249 3. When running in the test harness, delay a bit after writing a bounce
6250 message to get a bit more predictability in the log output.
6252 4. Added a call to search_tidyup() just before forking a reception process. In
6253 theory, someone could use a lookup in the expansion of smtp_accept_max_
6254 per_host which, without the tidyup, could leave open a database connection.
6256 5. Added the variables $recipient_data and $sender_data which get set from a
6257 lookup success in an ACL "recipients" or "senders" condition, or a router
6258 "senders" option, similar to $domain_data and $local_part_data.
6260 6. Moved the writing of debug_print from before to after the "senders" test
6263 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6264 problems for message scanning, either using a data ACL, or using
6265 local_scan() because the Received: header was not generated till after they
6266 were called (in order to set the time as the time of reception completion).
6267 I have revised the way this works. The header is now generated after the
6268 body is received, but before the ACL or local_scan() are called. After they
6269 are run, the timestamp in the header is updated.
6275 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6276 before starting a queue runner without re-exec. This happened only when
6277 deliver_drop_privilege was set or when the Exim user was set to root. The
6278 effect of the bug was that timeouts during subsequent deliveries caused
6279 crashes instead of being properly handled. The handler is now left at its
6280 default (and expected) setting.
6282 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6283 message, again when deliver_drop_privilege is set or Exim is run as root.
6284 The bug described in (1) was not present in this case, but the tidying up
6285 of the other signals was missing. I have made the two cases consistent.
6287 3. The ignore_target_hosts setting on a manualroute router was being ignored
6288 for hosts that were looked up using the /MX notation.
6290 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6293 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6294 operated on the sender address. After changing the $sender_address to <>
6295 for the sender address verify, Exim was re-instated it as the original
6296 (before rewriting) address, but remembering that it had rewritten it, so it
6297 wasn't rewriting it again. This bug also had the effect of breaking the
6298 sender address verification caching when the sender address was rewritten.
6300 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6301 This has been changed so that if the ip literal address matches
6302 ignore_target_hosts, the router declines.
6304 7. Added expansion conditions match_domain, match_address, and match_local_
6305 part (NOT match_host).
6307 8. The placeholder for the Received: header didn't have a length field set.
6309 9. Added code to Exim itself and to exim_lock to test for a specific race
6310 condition that could lead to file corruption when using MBX delivery. The
6311 issue is with the lockfile that is created in /tmp. If this file is removed
6312 after a process has opened it but before that process has acquired a lock,
6313 there is the potential for a second process to recreate the file and also
6314 acquire a lock. This could lead to two Exim processes writing to the file
6315 at the same time. The added code performs the same test as UW imapd; it
6316 checks after acquiring the lock that its file descriptor still refers to
6317 the same named file.
6319 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6320 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6323 11. Added the smtp_active_hostname option. If used, this will typically be made
6324 to depend on the incoming interface address. Because $interface_address is
6325 not set up until the daemon has forked a reception process, error responses
6326 that can happen earlier (such as "too many connections") no longer contain
6329 12. If an expansion in a condition on a "warn" statement fails because a lookup
6330 defers, the "warn" statement is abandoned, and the next ACL statement is
6331 processed. Previously this caused the whole ACL to be aborted.
6333 13. Added the iplsearch lookup type.
6335 14. Added ident_timeout as a log selector.
6337 15. Added tls_certificate_verified as a log selector.
6339 16. Added a global option tls_require_ciphers (compare the smtp transport
6340 option of the same name). This controls incoming TLS connections.
6342 17. I finally figured out how to make tls_require_ciphers do a similar thing
6343 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6344 before starting the TLS session.
6346 18. Tabs are now shown as \t in -bP output.
6348 19. If the log selector return_path_on_delivery was set, Exim crashed when
6349 bouncing a message because it had too many Received: header lines.
6351 20. If two routers both had headers_remove settings, and the first one included
6352 a superfluous trailing colon, the final name in the first list and the
6353 first name in the second list were incorrectly joined into one item (with a
6354 colon in the middle).
6360 1. Added -C and -D options to the exinext utility, mainly to make it easier
6361 to include in the automated testing, but these could be helpful when
6362 multiple configurations are in use.
6364 2. The exinext utility was not formatting the output nicely when there was
6365 an alternate port involved in the retry record key, nor when there was a
6366 message id as well (for retries that were specific to a specific message
6367 and a specific host). It was also confused by IPv6 addresses, because of
6368 the additional colons they contain. I have fixed the IPv4 problem, and
6369 patched it up to do a reasonable job for IPv6.
6371 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6372 delivery, the log line now contains "pipelined" if PIPELINING was used.
6374 4. An SMTP transport process used to panic and die if the bind() call to set
6375 an explicit outgoing interface failed. This has been changed; it is now
6376 treated in the same way as a connect() failure.
6378 5. A reference to $sender_host_name in the part of a conditional expansion
6379 that was being skipped was still causing a DNS lookup. This no longer
6382 6. The def: expansion condition was not recognizing references to header lines
6383 that used bh_ and bheader_.
6385 7. Added the _cache feature to named lists.
6387 8. The code for checking quota_filecount in the appendfile transport was
6388 allowing one more file than it should have been.
6390 9. For compatibility with Sendmail, the command line option
6398 and sets the incoming protocol and host name (for trusted callers). The
6399 host name and its colon can be omitted when only the protocol is to be set.
6400 Note the Exim already has two private options, -pd and -ps, that refer to
6401 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6402 "s", but I don't think that's a major issue.
6404 10. A number of refactoring changes to the code, none of which should affect
6407 (a) The number of logging options was getting close to filling up the
6408 32-bit word that was used as a bit map. I have split them into two classes:
6409 those that are passed in the argument to log_write(), and those that are
6410 only ever tested independently outside of that function. These are now in
6411 separate 32-bit words, so there is plenty of room for expansion again.
6412 There is no change in the user interface or the logging behaviour.
6414 (b) When building, for example, log lines, the code previously used a
6415 macro that called string_cat() twice, in order to add two strings. This is
6416 not really sufficiently general. Furthermore, there was one instance where
6417 it was actually wrong because one of the argument was used twice, and in
6418 one call a function was used. (As it happened, calling the function twice
6419 did not affect the overall behaviour.) The macro has been replaced by a
6420 function that can join an arbitrary number of extra strings onto a growing
6423 (c) The code for expansion conditions now uses a table and a binary chop
6424 instead of a serial search (which was left over from when there were very
6425 few conditions). Also, it now recognizes conditions like "pam" even when
6426 the relevant support is not compiled in: a suitably worded error message is
6427 given if an attempt is made to use such a condition.
6429 11. Added ${time_interval:xxxxx}.
6431 12. A bug was causing one of the ddress fields not to be passed back correctly
6432 from remote delivery subprocesses. The field in question was not being
6433 subsequently used, so this caused to problems in practice.
6435 13. Added new log selectors queue_time and deliver_time.
6437 14. Might have fixed a bug in maildirsizefile handling that threw up
6438 "unexpected character" debug warnings, and recalculated the data
6439 unnecessarily. In any case, I expanded the warning message to give more
6442 15. Added the message "Restricted characters in address" to the statements in
6443 the default ACL that block characters like @ and % in local parts.
6445 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6446 Three changes have been made:
6448 (a) There was a serious bug; a negative response to MAIL caused the whole
6449 recipient domain to be cached as invalid, thereby blocking all messages
6450 to all local parts at the same domain, from all senders. This bug has
6451 been fixed. The domain is no longer cached after a negative response to
6452 MAIL if the sender used is not empty.
6454 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6457 (c) A new callout option, "use_sender" has been added for people who want
6458 the modified behaviour.
6464 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6467 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6468 indeed breaks things for older releases.
6470 3. Added additional logging to the case where there is a problem reading data
6471 from a filter that is running in a subprocess using a pipe, in order to
6472 try to track down a specific problem.
6474 4. Testing facility fudge: when running in the test harness and attempting
6475 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6476 getting "No route to host". Convert this to a timeout.
6478 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6481 6. Some OS don't have socklen_t but use size_t instead. This affects the
6482 fifth argument of getsockopt() amongst other things. This is now
6483 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6484 can be set for individual OS. I have set it for SunOS5, OSF1, and
6485 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6486 some earlier ones do not.
6488 7. Change 4.30/15 was not doing the test caselessly.
6490 8. The standard form for an IPv6 address literal was being rejected by address
6491 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6492 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6493 this, as well as the form without the "IPv6" on the front (but only when
6494 address literals are enabled, of course).
6496 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6498 10. Exim crashed if a message with an empty sender address specified by -f
6499 encountered a router with an errors_to setting. This could be provoked only
6500 by a command such as
6504 where an empty string was supplied; "<>" did not hit this bug.
6506 11. Installed PCRE release 4.5.
6508 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6509 remained set. It is now erased.
6511 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6512 times from message ids (which are base 36 rather than the normal 62).
6514 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6515 were being counted as actual protocol errors, and logged if the log
6516 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6517 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6518 and DATA following a set of rejected RCPTs do not count as protocol errors.
6519 In other words, Exim assumes they were pipelined, though this may not
6520 actually be the case. Of course, in all cases the client gets an
6521 appropriate error code.
6523 15. If a lookup fails in an ACL condition, a message about the failure may
6524 be available; it is used if testing the ACL cannot continue, because most
6525 such messages specify what the cause of the deferral is. However, some
6526 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6527 that caused an old message to be retained and used if a later statement
6528 caused a defer, replacing the real cause of the deferral.
6530 16. If an IP address had so many PTR records that the DNS lookup buffer
6531 was not large enough to hold them, Exim could crash while trying to process
6532 the truncated data. It now detects and logs this case.
6534 17. Further to 4.21/58, another change has been made: if (and only if) the
6535 first line of a message (the first header line) ends with CRLF, a bare LF
6536 in a subsequent header line has a space inserted after it, so as not to
6537 terminate the header.
6539 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6540 unnecessarily, used atoi() instead of strtol(), and didn't check the
6541 termination when getting file sizes from file names by regex.
6543 19. Completely re-implemented the support for maildirsize files, in the light
6544 of a number of problems with the previous contributed implementation
6545 (4.30/29). In particular:
6547 . If the quota is zero, the maildirsize file is maintained, but no quota is
6550 . If the maildir directory does not exist, it is created before any attempt
6551 to write a maildirsize file.
6553 . The quota value in the file is just a cache; if the quota is changed in
6554 the transport, the new value overrides.
6556 . A regular expression is available for excluding directories from the
6559 20. The autoreply transport checks the characters in options that define the
6560 message's headers; it allows continued headers, but it was checking with
6561 isspace() after an embedded newline instead of explicitly looking for a
6564 21. If all the "regular" hosts to which an address was routed had passed their
6565 expiry times, and had not reached their retry times, the address was
6566 bounced, even if fallback hosts were defined. Now Exim should go on to try
6569 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6570 equivalent code in the SMTP transport. Some hosts send humungous responses
6571 to HELO/EHLO, more than 1024 it seems.
6573 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6574 gives compiler warnings in some environments. I've now done it "properly",
6577 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6578 (because of problems with the built-in one) was declared to return uschar *
6579 instead of char *, causing compiler failure.
6581 25. Fixed a file descriptor leak when processing alias/forward files.
6583 26. Fixed a minor format string issue in dbfn.c.
6585 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6587 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6588 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6591 29. When a sender address is verified, it is cached, to save repeating the test
6592 when there is more than one recipient in a message. However, when the
6593 verification involves a callout, it is possible for different callout
6594 options to be set for different recipients. It is too complicated to keep
6595 track of this in the cache, so now Exim always runs a verification when a
6596 callout is required, relying on the callout cache for the optimization.
6597 The overhead is duplication of the address routing, but this should not be
6600 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6601 to be verified with callout=postmaster, and the main callout worked but the
6602 postmaster check failed, the verification correctly failed. However, if a
6603 subsequent RCPT command asked for sender verification *without* the
6604 postmaster check, incorrect caching caused this verification also to fail,
6607 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6608 it was not caching the DNS options (qualify_single, search_parents) that
6609 were used when the lookup failed. A subsequent lookup with different
6610 options therefore always gave the same answer, though there were cases
6611 where it should not have. (Example: a "domains = !$mx_any" option on a
6612 dnslookup router: the "domains" option is always processed without any
6613 widening, but the router might have qualify_single set.) Now Exim uses the
6614 cached value only when the same options are set.
6616 32. Added John Jetmore's "exipick" utility to the distribution.
6618 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6619 than a timeout (e.g. a certificate is required, and is not provided), an
6620 Exim server now closes the connection immediately. Previously it waited for
6621 the client to close - but if the client is SSL, it seems that they each
6622 wait for each other, leading to a delay before one of them times out.
6624 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6625 maintained 0.8.x compatibility because I don't think many are using it, and
6626 it is clearly obsolete.
6628 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6631 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6632 client certificate was expired. A simple patch fixes this, though I don't
6633 understand the full logic of why the verify callback is called multiple
6636 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6637 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6638 which causes problems with some clients (such as the Certicom SSL Plus
6639 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6640 disables the coutermeasure allowing Eudora to connect."
6642 38. Exim was not checking that a write() to a log file succeeded. This could
6643 lead to Bad Things if a log got too big, in particular if it hit a file
6644 size limit. Exim now panics and dies if it cannot write to a log file, just
6645 as it does if it cannot open a log file.
6647 39. Modified OS/Makefile-Linux so that it now contains
6649 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6651 The two -D definitions ensure that Exim is compiled with large file
6652 support, which makes it possible to handle log files that are bigger than
6655 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6656 instance) a domain was checked against a named list that involved a lookup,
6657 causing $domain_data to be set, then another domain was checked against the
6658 same list, then the first domain was re-checked, the value of $domain_data
6659 after the final check could be wrong. In particular, if the second check
6660 failed, it could be set empty. This bug probably also applied to
6663 41. The strip_trailing_dot option was not being applied to the address given
6664 with the -f command-line option.
6666 42. The code for reading a message's header from the spool was incrementing
6667 $received_count, but never initializing it. This meant that the value was
6668 incorrect (doubled) while delivering a message in the same process in which
6669 it was received. In the most common configuration of Exim, this never
6670 happens - a fresh exec is done - but it can happen when
6671 deliver_drop_privilege is set.
6673 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6674 it now includes up to 150 characters of the unexpected data in the log
6677 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6678 and building data strings. The size of both of these buffers was 10 000
6679 bytes - far larger than anybody would *ever* want, thought I. Needless to
6680 say, somebody hit the limit. I have increased the maximum line length to
6681 20 000 and the maximum data length of concatenated lines to 100 000. I have
6682 also fixed two bugs, because there was no checking on these buffers. Tsk,
6683 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6684 buffer is too small.
6686 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6687 lsearch lookups. Now it does.
6689 46. When parsing a route_list item in a manualroute router, a fixed-length
6690 buffer was used for the list of hosts. I made this 1024 bytes long,
6691 thinking that nobody would ever have a list of hosts that long. Wrong.
6692 Somebody had a whole pile of complicated expansion conditions, and the
6693 string was silently truncated, leading to an expansion error. It turns out
6694 that it is easier to change to an unlimited length (owing to other changes
6695 that have happened since this code was originally written) than to build
6696 structure for giving a limitation error. The length of the item that
6697 expands into the list of hosts is now unlimited.
6699 47. The lsearch lookup could not handle data where the length of text line was
6700 more than 4095 characters. Such lines were truncated, leading to shortened
6701 data being returned. It should now handle lines of any length.
6703 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6704 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6707 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6708 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6709 no longer happens in comment lines. A list of replacements is now placed
6710 at the head of all of the source files, except those whose only change is
6711 to replace PERL_COMMAND in the very first #! line.
6713 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6714 messages on the queue, with a bottom-up merge sort, using code contributed
6715 by Michael Haardt. This should make operations like -bp somewhat faster on
6716 large queues. It won't affect queue runners, except when queue_run_in_order
6719 51. Installed eximstats 1.31 in the distribution.
6721 52. Added support for SRV lookups to the dnslookup router.
6723 53. If an ACL referred to $message_body or $message_body_end, the value was not
6724 reset for any messages that followed in the same SMTP session.
6726 54. The store-handling optimization for building very long strings was not
6727 differentiating between the different store pools. I don't think this
6728 actually made any difference in practice, but I've tidied it.
6730 55. While running the routers to verify a sender address, $sender_address
6731 was still set to the sender address. This is wrong, because when routing to
6732 send a bounce to the sender, it would be empty. Therefore, I have changed
6733 it so that, while verifying a sender address, $sender_address is set to <>.
6734 (There is no change to what happens when verifying a recipient address.)
6736 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6737 target A or AAAA records (if not already returned) without resetting the
6738 qualify_single or search_parents options of the DNS resolver. These are
6739 inappropriate in this case because the targets of MX and SRV records must
6740 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6741 target that, when qualified, matched something in the local domain. These
6742 two options are now turned off when doing these lookups.
6744 57. It seems that at least some releases of Reiserfs (which does not have the
6745 concept of a fixed number of inodes) returns zero and not -1 for the
6746 number of available inodes. This interacted badly with check_spool_inodes,
6747 which assumed that -1 was the "no such thing" setting. What I have done is
6748 to check that the total number of inodes is greater than zero before doing
6749 the test of how many are available.
6751 58. When a "warn" ACL statement has a log_message modifier, the message is
6752 remembered, and not repeated. This is to avoid a lot of repetition when a
6753 message has many recipients that cause the same warning to be written.
6754 However, Exim was preserving the list of already written lines for an
6755 entire SMTP session, which doesn't seem right. The memory is now reset if a
6756 new message is started.
6758 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6759 debugging output unless log_rewrite was also set.
6761 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6762 of (int)(handle) when we know that handle contains (void *)(-1).
6764 61. The Exim daemon panic-logs an error return when it closes the incoming
6765 connection. However "connection reset by peer" seems to be common, and
6766 isn't really an error worthy of noting specially, so that particular error
6769 62. When Exim is trying to find all the local interfaces, it used to panic and
6770 die if the ioctl to get the interface flags failed. However, it seems that
6771 on at least one OS (Solaris 9) it is possible to have an interface that is
6772 included in the list of interfaces, but for which you get a failure error
6773 for this call. This happens when the interface is not "plumbed" into a
6774 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6775 failure of the "get flags" call assumes that the interface is down.
6777 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6778 makes life easier for people who are doing arithmetic on fields extracted
6779 from dates, where you often get leading zeros that should not be
6780 interpreted as octal.
6782 64. Added qualify_domain to the redirect router, to override the global
6785 65. If a pathologically long header line contained very many addresses (the
6786 report of this problem mentioned 10 000) and each of them was rewritten,
6787 Exim could use up a very large amount of memory. (It kept on making new
6788 copies of the header line as it rewrote, and never released the old ones.)
6789 At the expense of a bit more processing, the header rewriting function has
6790 been changed so that it no longer eats memory in this way.
6792 66. The generation of the Received: header has been moved from the time that a
6793 message starts to be received, to the time that it finishes. The timestamp
6794 in the Received: header should now be very close to that of the <= log
6795 line. There are two side-effects of this change:
6797 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6798 logged header lines no longer include the local Received: line, because
6799 it has not yet been created. The same applies to a copy of the message
6800 that is returned to a non-SMTP sender when a message is rejected.
6802 (b) When a filter file is tested using -bf, no additional Received: header
6803 is added to the test message. After some thought, I decided that this
6806 This change does not affect the value of $received_for. It is still set
6807 after address rewriting, but before local_scan() is called.
6809 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6811 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6812 gave an unhelpful panic error message, and a defer error. I have managed to
6813 change this behaviour so that it now rejects any supplied certificate,
6814 which seems right, as the list of acceptable certificates is empty.
6816 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6817 gave an unhelpful defer error. I have not managed to make this reject any
6818 supplied certificates, but the error message it gives is "no certificate
6819 supplied", which is not helpful.
6821 70. exigrep's output now also includes lines that are not associated with any
6822 message, but which match the given pattern. Implemented by a patch from
6823 Martin Sluka, which also tidied up the Perl a bit.
6825 71. Recipient callout verification, like sender verification, was using <> in
6826 the MAIL FROM command. This isn't really the right thing, since the actual
6827 sender may affect whether the remote host accepts the recipient or not. I
6828 have changed it to use the actual sender in the callout; this means that
6829 the cache record is now keyed on a recipient/sender pair, not just the
6830 recipient address. There doesn't seem to be a real danger of callout loops,
6831 since a callout by the remote host to check the sender would use <>.
6832 [SEE ABOVE: changed after hitting problems.]
6834 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6835 temporary errors. However, in the case of such a code being given after
6836 the end of a data transmission (i.e. after ".") Exim was failing to write
6837 a retry record for the message. (Yes, there was some broken host that was
6838 actually sending 8xx at this point.)
6840 73. An unknown lookup type in a host list could cause Exim to panic-die when
6841 the list was checked. (An example that provoked this was putting <; in the
6842 middle of a list instead of at the start.) If this happened during a DATA
6843 ACL check, a -D file could be left lying around. This kind of configuration
6844 error no longer causes Exim to die; instead it causes a defer error. The
6845 incident is still logged to the main and panic logs.
6847 74. Buglet left over from Exim 3 conversion. The message "too many messages
6848 in one connection" was written to the rejectlog but not the mainlog, except
6849 when address rewriting (yes!) was being logged.
6851 75. Added write_rejectlog option.
6853 76. When a system filter was run not as root (that is, when system_filter_user
6854 was set), the values of the $n variables were not being returned to the
6855 main process; thus, they were not subsequently available in the $sn
6858 77. Added +return_path_on_delivery log selector.
6860 78. A connection timeout was being treated differently from recipients deferred
6861 when testing hosts_max_try with a message that was older than the host's
6862 retry timeout. (The host should not be counted, thus allowing all hosts to
6863 be tried at least once before bouncing.) This may have been the cause of an
6864 occasionally reported bug whereby a message would remain on the queue
6865 longer than the retry timeout, but would be bounced if a delivery was
6866 forced. I say "may" because I never totally pinned down the problem;
6867 setting up timeout/retry tests is difficult. See also the next item.
6869 79. The ultimate address timeout was not being applied to errors that involved
6870 a combination of host plus message (for example, a timeout on a MAIL
6871 command). When an address resolved to a number of possible hosts, and they
6872 were not all tried for each delivery (e.g. because of hosts_max_try), a
6873 message could remain on the queue longer than the retry timeout.
6875 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6878 81. Fixed an obscure SMTP outgoing bug which required at least the following
6879 conditions: (a) there was another message waiting for the same server;
6880 (b) the server returned 5xx to all RCPT commands in the first message so
6881 that the message was not completed; (c) the server dropped the connection
6882 or gave a negative response to the RSET that Exim sends to abort the
6883 transaction. The observed case was a dropped connection after DATA that had
6884 been sent in pipelining mode. That is, the server had advertised PIPELINING
6885 but was not implementing it correctly. The effect of the bug was incorrect
6886 behaviour, such as trying another host, and this could lead to a crash.
6892 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6893 and daemon.c were passed as pointers to ints; they should have been
6894 pointers to socklen_t variables (which are typically unsigned ints).
6896 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6899 3. Fixed a really odd bug that affected only the testing scheme; patching a
6900 certain fixed string in the binary changed the value of another string that
6901 happened to be identical to the end of the original first string.
6903 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6904 name", it returns that address as the IP address. On some operating
6905 systems (e.g. Solaris), it also passes back the IP address string as the
6906 "host name". However, on others (e.g. Linux), it passes back an empty
6907 string. Exim wasn't checking for this, and was changing the host name to an
6908 empty string, assuming it had been canonicalized.
6910 5. Although rare, it is permitted to have more than one PTR record for a given
6911 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6912 all the names associated with an address, because they do in Solaris.
6913 However, it seems that they do not in Linux for data that comes from the
6914 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6915 I found this out when I moved to a new Linux workstation and tried to run
6916 the Exim test suite.
6918 To get round this problem I have changed the code so that it now does its
6919 own call to the DNS to look up PTR records when searching for a host name.
6920 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6921 addresses that are only in /etc/hosts are still found.
6923 This behaviour is, however, controlled by an option called host_lookup_
6924 order, which defaults to "bydns:byaddr". If people want to use the other
6925 order, or indeed, just use one or the other means of lookup, they can
6926 specify it in this variable.
6928 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6929 some operating systems, this comes back from gethostbyaddr() as an empty
6930 string, and this is what Exim used to test for. However, it seems that in
6931 other systems, "." is yielded. Exim now tests for this case too.
6933 7. The values of check_spool_space and check_log_space are now held internally
6934 as a number of kilobytes instead of an absolute number of bytes. If a
6935 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6936 kilobyte. This means that much larger values can be stored.
6938 8. Exim monitor: an attempt to get the action menu when not actually pointing
6939 at a message produces an empty menu entitled "No message selected". This
6940 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6941 no entries in it ("Shell widget menu has zero width and/or height"). So I
6942 have added a single, blank menu entry in this case.
6944 9. Added ${quote_local_part.
6946 10. MIME decoding is now applied to the contents of Subject: header lines when
6949 11. Now that a reference to $sender_host_address automatically causes a reverse
6950 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6951 host lookup before query-style lookups in lists that might use this
6952 variable. This has therefore been abolished, and the "net-" prefix is no
6953 longer necessary for query-style lookups.
6955 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6956 have been a typo for LFLAGS, so it has been changed.
6958 13. The install script calls Exim with "-C /dev/null" in order to find the
6959 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6960 to be output. However, since Exim outputs its version number before the
6961 error, it didn't break the script. It just looked ugly. I fixed this by
6962 always allowing "-C /dev/null" if the caller is root.
6964 14. Ignore overlarge ACL variable number when reading spool file - insurance
6965 against a later release with more variables having written the file.
6967 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6968 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6969 this, as well as the form without the "IPv6" on the front.
6971 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6972 OS/Makefile-Darwin file.
6974 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6975 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6977 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6978 variable. However, some OS use ints for inodes. I've added cast to long int
6979 to get rid of the compiler warning.
6981 19. I had forgotten to lock out "/../" in configuration file names when
6982 ALT_CONFIG_PREFIX was set.
6984 20. Routers used for verification do not need to specify transports. However,
6985 if such a router generated a host list, and callout was configured, Exim
6986 crashed, because it could not find a port number from the (non-existent)
6987 transport. It now assumes port 25 in this circumstance.
6989 21. Added the -t option to exigrep.
6991 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6992 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6993 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6994 them is set, LOOKUP_LSEARCH is forced.
6996 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6998 24. Added sender and host information to the "rejected by local_scan()" log
6999 line; previously there was no indication of these.
7001 25. Added .include_if_exists.
7003 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7004 Linux. It turns out that not all file systems support this. Apparently some
7005 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7006 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7007 not supported on the file descriptor, is now ignored when Exim is trying to
7008 sync a directory. This applies only to Linux.
7010 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7012 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7013 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7016 29. Added support for maildirsize files from supplied patch (modified a bit).
7018 30. The use of :fail: followed by an empty string could lead Exim to respond to
7019 sender verification failures with (e.g.):
7021 550 Verification failed for <xxx>
7022 550 Sender verify failed
7024 where the first response line was missing the '-' that indicates it is not
7025 the final line of the response.
7027 31. The loop for finding the name of the user that called Exim had a hardwired
7028 limit of 10; it now uses the value of finduser_retries, which is used for
7029 all other user lookups.
7031 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7034 33. Exim was neglecting to zero errno before one call of strtol() when
7035 expanding a string and expecting an integer value. On some systems this
7036 resulted in spurious "integer overflow" errors. Also, it was casting the
7037 result into an int without checking.
7039 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7040 did not work. The code looks as if it has *never* worked, though it appears
7041 to have been documented since at least release 1.62. I have made it work.
7043 35. The "timeout_DNS" error in retry rules, also documented since at least
7044 1.62, also never worked. As it isn't clear exactly what this means, and
7045 clearly it isn't a major issue, I have abolished the feature by treating it
7046 as "timeout", and writing a warning to the main and panic logs.
7048 36. The display of retry rules for -brt wasn't always showing the error code
7051 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7052 timeout_connect_A, timeout_connect_MX.
7054 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7055 to the empty sender.
7057 39. The daemon was not analysing the content of -oX till after it had closed
7058 stderr and disconnected from the controlling terminal. This meant that any
7059 syntax errors were only noted on the panic log, and the return code from
7060 the command was 0. By re-arranging the code a little, I've made the
7061 decoding happen first, so such errors now appear on stderr, and the return
7062 code is 1. However, the actual setting up of the sockets still happens in
7063 the disconnected process, so errors there are still only recorded on the
7066 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7067 connections (as happens on some IP stacks) was logged at start up time as
7068 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7069 it from "IPv6 and IPv4", which means that two separate sockets are being
7072 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7073 says whether AF_INET or AF_INET6 was passed as an argument.
7075 42. Exiwhat output was messed up when time zones were included in log
7078 43. Exiwhat now gives more information about the daemon's listening ports,
7079 and whether -tls-on-connect was used.
7081 44. The "port" option of the smtp transport is now expanded.
7083 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7084 silently ignored. Now an error message is written to the main and panic
7087 46. There's a new ACL modifier called "logwrite" which writes to a log file
7088 as soon as it is encountered.
7090 47. Added $local_user_uid and $local_user_gid at routing time.
7092 48. Exim crashed when trying to verify a sender address that was being
7095 49. Exim was recognizing only a space character after ".include". It now also
7096 recognizes a tab character.
7098 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7099 extracting the relevant information from the specification. The man page no
7100 longer contains scrambled data for the -d option, and I've added a section
7101 at the front about calling Exim under different names.
7103 51. Added "extra_headers" argument to the "mail" command in filter files.
7105 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7108 53. Installed eximstats 1.29.
7110 54. Added transport_filter_timeout as a generic transport option.
7112 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7113 Cc: header lines. This was required by RFC 822, but it not required by RFC
7116 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7117 incoming messages that did not have them. Now it does so only if the
7118 message originates locally, that is, if there is no associated remote host
7119 address. When Resent- header lines are present, this applies to the Resent-
7120 lines rather than the non-Resent- lines.
7122 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7123 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7125 58. Messages for configuration errors now include the name of the main
7126 configuration file - useful now that there may be more than one file in a
7127 list (.included file names were always shown).
7129 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7130 for those rare installations that do not start the daemon as root or run it
7131 setuid root. I've cut out the call to initgroups() if the daemon is not
7134 60. The Exim user and group can now be bound into the binary as text strings
7135 that are looked up at the start of Exim's processing.
7137 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7139 62. Added $mailstore_basename variable.
7141 63. Installed patch to sieve.c from Michael Haardt.
7143 64. When Exim failed to open the panic log after failing to open the main log,
7144 the original message it was trying to log was written to stderr and debug
7145 output, but if they were not available (the usual case in production), it
7146 was lost. Now it is written to syslog before the two lines that record the
7147 failures to open the logs.
7149 65. Users' Exim filters run in subprocesses under the user's uid. It is
7150 possible for a "deliver" command or an alias in a "personal" command to
7151 provoke an address rewrite. If logging of address rewriting is configured,
7152 this fails because the process is not running as root or exim. There may be
7153 a better way of dealing with this, but for the moment (because 4.30 needs
7154 to be released), I have disabled address rewrite logging when running a
7155 filter in a non-root, non-exim process.
7161 1. The buildconfig auxiliary program wasn't quoting the value set for
7162 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7163 not defined. This bug was masked in 4.22 by the effect that was fixed in
7166 2. Some messages that were rejected after a message id was allocated were
7167 shown as "incomplete" by exigrep. It no longer does this for messages that
7168 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7170 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7171 have allow_domain_literals set, the ID did not get logged in the <= line.
7172 Domain literals are now always recognized in Message-ID: header lines.
7174 4. The first argument for a ${extract expansion item is the key name or field
7175 number. Leading and trailing spaces in this item were not being ignored,
7176 causing some misleading effects.
7178 5. When deliver_drop_privilege was set, single queue runner processes started
7179 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7180 same command in the process it spins off) were not dropping privilege.
7182 6. When the daemon running as "exim" started a queue runner, it always
7183 re-executed Exim in the spun-off process. This is a waste of effort when
7184 deliver_drop_privilege is set. The new process now just calls the
7185 queue-runner function directly.
7191 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7194 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7195 ignored. Though the use of -oP was forcing the writing of a pid file, it
7196 was always written to the default place.
7198 3. If the message "no IP address found for host xxxx" is generated during
7199 incoming verification, it is now followed by identification of the incoming
7200 connection (so you can more easily find what provoked it).
7202 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7204 5. Added some features to "harden" Exim a bit more against certain attacks:
7206 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7207 be put in Local/Makefile. This is like the never_users runtime option,
7208 but it cannot be overridden. The default setting is "root".
7210 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7211 prefix string with which any file named in a -C command line option
7214 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7215 is retained for -C and -D only if the caller of Exim is root. Without
7216 it, the exim user may also use -C and -D and retain privilege.
7218 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7219 command line option is disabled.
7221 6. Macro names set by the -D option must start with an upper case letter, just
7222 like macro names defined in the configuration file.
7224 7. Added "dereference=" facility to LDAP.
7226 8. Two instances of the typo "uknown" in the source files are fixed.
7228 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7229 the Configure-Makefile script screwed up while processing it.
7231 10. Incorporated PCRE 4.4.
7233 11. The SMTP synchronization check was not operating right at the start of an
7234 SMTP session. For example, it could not catch a HELO sent before the client
7235 waited for the greeting. There is now a check for outstanding input at the
7236 point when the greeting is written. Because of the duplex, asynchronous
7237 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7238 way, but not yet received, when the check is performed.
7240 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7241 on TCP/IP sockets, because this apparently causes some broken clients to
7244 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7245 unchanged) from the Cygwin maintainer.
7247 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7248 was supported instead of testing for mbx. Effectively a typo.
7250 15. The spa authenticator server code was not checking that the input it
7251 received was valid base64.
7253 16. The debug output line for the "set" modifier in ACLs was not showing the
7254 name of the variable that was being set.
7256 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7258 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7259 lookup on its own. Something else was needed to trigger the lookup. For
7260 example, a match in host_lookup or the need for a host name in a host list.
7261 Now, if $sender_host_name is referenced and the host name has not yet been
7262 looked up, a lookup is performed. If the lookup fails, the variable remains
7263 empty, and $host_lookup_failed is set to "1".
7265 19. Added "eqi" as a case-independent comparison operator.
7267 20. The saslauthd authentication condition could segfault if neither service
7268 nor realm was specified.
7270 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7271 error message that was logged was misleading, and incoming SMTP
7272 connections were dropped. The message is now more accurate, and temporary
7273 errors are given to SMTP connections.
7275 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7276 (except RSET) with a 421 error, until QUIT is received. However, it was
7277 failing to send a response to QUIT.
7279 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7280 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7281 ACL is now run after the helo_try_verify_hosts code.
7283 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7284 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7285 case-independent, so other case variants are also recognized). Apparently
7286 some systems use these upper case variants.
7288 25. If more than two messages were waiting for the same host, and a transport
7289 filter was specified for the transport, Exim sent two messages over the
7290 same TCP/IP connection, and then failed with "socket operation on non-
7291 socket" when it tried to send the third.
7293 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7295 27. The extern definition of crypt16() in expand.c was not being excluded when
7296 the OS had its own crypt16() function.
7298 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7299 as a preferred synonym for return_size_limit, both as an option and as an
7302 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7304 30. Changed the default configuration ACL to relax the local part checking rule
7305 for addresses that are not in any local domains. For these addresses,
7306 slashes and pipe symbols are allowed within local parts, but the sequence
7307 /../ is explicitly forbidden.
7309 31. SPA server authentication was not clearing the challenge buffer before
7312 32. log_message in a "warn" ACL statement was writing to the reject log as
7313 well as to the main log, which contradicts the documentation and doesn't
7314 seem right (because no rejection is happening). So I have stopped it.
7316 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7317 However, I am unable to do any testing of this.
7319 34. Fixed an infelicity in the appendfile transport. When checking directories
7320 for a mailbox, to see if any needed to be created, it was accidentally
7321 using path names with one or more superfluous leading slashes; tracing
7322 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7324 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7325 contents are added to the log line that is written for every discarded
7326 recipient. (Previously a log_message setting was ignored.)
7328 36. The ${quote: operator now quotes the string if it is empty.
7330 37. The install script runs exim in order to find its version number. If for
7331 some reason other than non-existence or emptiness, which it checks, it
7332 could not run './exim', it was installing it with an empty version number,
7333 i.e. as "exim-". This error state is now caught, and the installation is
7336 38. An argument was missing from the function that creates an error message
7337 when Exim fails to connect to the socket for saslauthd authentication.
7338 This could cause Exim to crash, or give a corrupted message.
7340 39. Added isip, isip4, and isip6 to ${if conditions.
7342 40. The ACL variables $acl_xx are now saved with the message, and can be
7343 accessed later in routers, transports, and filters.
7345 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7346 strings in the file are not string-expanded.
7348 42. If a MAIL command specified a SIZE value that was too large to fit into an
7349 int variable, the check against message_size_limit failed. Such values are
7350 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7351 day this will have to be increased, but I don't think I want to be around
7352 when emails are that large.
7359 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7360 iconv() is not standard in FreeBSD.
7362 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7363 IPv6 enabled. The observed symptom was a segmentation fault on return from
7364 the function os_common_find_running_interfaces() in src/os.c.
7366 3. In the check_special_case() function in daemon.c I had used "errno" as an
7367 argument name, which causes warnings on some systems. This was basically a
7368 typo, since it was named "eno" in the comments!
7370 4. The code that waits for the clock to tick (at a resolution of some fraction
7371 of a second) so as to ensure message-id uniqueness was always waiting for
7372 at least one whole tick, when it could have waited for less. [This is
7373 almost certainly not relevant at current processor speeds, where it is
7374 unlikely to ever wait at all. But we try to future-proof.]
7376 5. The function that sleeps for a time interval that includes fractions of a
7377 second contained a race. It did not block SIGALRM between setting the
7378 timer, and suspending (a couple of lines later). If the interval was short
7379 and the sigsuspend() was delayed until after it had expired, the suspension
7380 never ended. On busy systems this could lead to processes getting stuck for
7383 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7384 process, before it forks any delivery processes. The open lookup caching
7385 mechanism meant that the open file or database connection was passed into
7386 the delivery process. The problem was that delivery processes always tidy
7387 up cached lookup data. This could cause a problem for the next delivery
7388 process started by the queue runner, because the external queue runner
7389 process does not know about the closure. So the next delivery process
7390 still has data in the lookup cache. In the case of a file lookup, there was
7391 no problem because closing a file descriptor in a subprocess doesn't affect
7392 the parent. However, if the lookup was caching a connection to a database,
7393 the connection was closed, and the second delivery process was likely to
7394 see errors such as "PGSQL: query failed: server closed the connection
7395 unexpectedly". The problem has been fixed by closing all cached lookups
7396 in a queue runner before running a delivery process.
7398 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7399 seem to have the "const" qualifier which it has on other OS. I've
7402 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7403 *of the same type* (client or server) with the same public name that an
7404 error should be diagnosed.
7406 9. When Exim looked up a host name for an IP address, but failed to find the
7407 original IP address when looking up the host name (a safety check), it
7408 output the message "<ip address> does not match any IP for NULL", which was
7409 confusing, to say the least. The bug was that the host name should have
7410 appeared instead of "NULL".
7412 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7413 user that is built into the binary, and the -C or -D options is used, root
7414 privilege is dropped before the configuration file is read. In addition,
7415 logging is switched to stderr instead of the normal log files. If the
7416 configuration then re-defines the Exim user, the unprivileged environment
7417 is probably not what is expected, so Exim logs a panic warning message (but
7420 However, if deliver_drop_privilege is set, the unprivileged state may well
7421 be exactly what is intended, so the warning has been cut out in that case,
7422 and Exim is allowed to try to write to its normal log files.
7428 1. smtp_return_error_details was not giving details for temporary sender
7429 or receiver verification errors.
7431 2. Diagnose a configuration error if two authenticators have the same public
7434 3. Exim used not to create the message log file for a message until the first
7435 delivery attempt. This could be confusing when incoming messages were held
7436 for policy or load reasons. The message log file is now created at the time
7437 the message is received, and an initial "Received" line is written to it.
7439 4. The automatically generated man page for command line options had a minor
7440 bug that caused no ill effects; however, a more serious problem was that
7441 the procedure for building the man page automatically didn't always
7442 operate. Consequently, release 4.20 contains an out-of-date version. This
7443 shouldn't happen again.
7445 5. When building Exim with embedded Perl support, the script that builds the
7446 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7447 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7449 6. The freeze_tell option was not being used for messages that were frozen on
7450 arrival, either by an ACL or by local_scan().
7452 7. Added the smtp_incomplete_transaction log selector.
7454 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7455 was accepting AUTH without a new EHLO.
7457 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7458 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7461 10. Logging of TCP/IP connections (when configured) now happens in the main
7462 daemon process instead of the child process, so that the TCP/IP connection
7463 count is more accurate (but it can never be perfect).
7465 11. The use of "drop" in a nested ACL was not being handled correctly in the
7466 outer ACL. Now, if condition failure induced by the nested "drop" causes
7467 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7468 or "require"), the connection is dropped.
7470 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7471 that yield "discard" can now be used with an "accept" or a "discard" verb,
7472 but an error is generated for any others (because I can't see a useful way
7473 to define what should happen).
7475 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7476 are now processed in the same way as lines in the Exim configuration file.
7477 In particular, continuation lines are supported.
7479 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7481 15. Added -ti meaning -t -i.
7483 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7484 domains, and warn by logging if others are found.
7486 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7487 returned from GIFCONF when Exim is trying to find the list of interfaces on
7488 a host. The code in os.c has been modified to copy each ifreq to an aligned
7489 structure in all cases.
7491 Also, in some cases, the returned ifreq's were being copied to a 'struct
7492 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7493 means the last couple of bytes of an IPv6 address could be chopped if the
7494 ifreq contained only a normal sockaddr (14 bytes storage).
7496 18. Named domain lists were not supported in the hosts_treat_as_local option.
7497 An entry such as +xxxx was not recognized, and was treated as a literal
7500 19. Ensure that header lines added by a DATA ACL are included in the reject log
7501 if the ACL subsequently rejects the message.
7503 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7504 MD5 (which is deprecated).
7506 21. When testing a filter file using -bf, Exim was writing a message when it
7507 took the sender from a "From " line in the message, but it was not doing so
7508 when it took $return_path from a Return-Path: header line. It now does.
7510 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7511 with a valid header line field name (a series of printing characters
7512 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7514 23. Changed "disc" in the source to "disk" to conform to the documentation and
7515 the book and for uniformity.
7517 24. Ignore Sendmail's -Ooption=value command line item.
7519 25. When execve() failed while trying to run a command in a pipe transport,
7520 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7521 could be confused with a return value of 69 from the command itself. This
7522 has been changed to 127, the value the shell returns if it is asked to run
7523 a non-existent command. The wording for the related log line suggests a
7524 non-existent command as the problem.
7526 26. If received_header_text expands to an empty string, do not add a Received:
7527 header line to the message. (Well, it adds a token one on the spool, but
7528 marks it "old" so that it doesn't get used or transmitted.)
7530 27. Installed eximstats 1.28 (addition of -nt option).
7532 28. There was no check for failure on the call to getsockname() in the daemon
7533 code. This can fail if there is a shortage of resources on the system, with
7534 ENOMEM, for example. A temporary error is now given on failure.
7536 29. Contrary to the C standard, it seems that in some environments, the
7537 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7538 program. Exim now does this explicitly; it affects the formatting of
7539 timestamps using strftime().
7541 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7542 complaints. I've now initialized all the variables, to avoid this.
7544 32. Header lines added by a system filter were not being "seen" during
7545 transport-time rewrites.
7547 33. The info_callback() function passed to OpenSSL is set up with type void
7548 (*)(SSL *, int, int), as described somewhere. However, when calling the
7549 function (actually a macro) that sets it up, the type void(*)() is
7550 expected. I've put in a cast to prevent warnings from picky compilers.
7552 34. If a DNS black list lookup found a CNAME record, but there were no A
7553 records associated with the domain it pointed at, Exim crashed.
7555 35. If a DNS black list lookup returned more than one A record, Exim ignored
7556 all but the first. It now scans all returned addresses if a particular IP
7557 value is being sought. In this situation, the contents of the
7558 $dnslist_value variable are a list of all the addresses, separated by a
7561 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7562 to accept a host name and all its aliases if the forward lookup for any of
7563 them yielded the IP address of the incoming connection. Now it accepts only
7564 those names whose forward lookup yields the correct IP address. Any other
7565 names are discarded. This closes a loophole whereby a rogue DNS
7566 administrator could create reverse DNS records to break through a
7567 wildcarded host restriction in an ACL.
7569 37. If a user filter or a system filter that ran in a subprocess used any of
7570 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7571 the wrong values were passed to the pipe command ($thisaddress had the
7572 value of $0, $0 had the value of $1, etc). This bug was introduced by
7573 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7575 38. Improved the line breaking for long SMTP error messages from ACLs.
7576 Previously, if there was no break point between 40 and 75 characters, Exim
7577 left the rest of the message alone. Two changes have been made: (a) I've
7578 reduced the minimum length to 35 characters; (b) if it can't find a break
7579 point between 35 and 75 characters, it looks ahead and uses the first one
7580 that it finds. This may give the occasional overlong line, but at least the
7581 remaining text gets split now.
7583 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7584 file descriptors might be low, and that setting 1000 would always raise it.
7585 It turns out that in some environments, the limit is already over 1000 and
7586 that lowering it causes trouble. So now Exim takes care not to decrease it.
7588 40. When delivering a message, the value of $return_path is set to $sender_
7589 address at the start of routing (routers may change the value). By an
7590 oversight, this default was not being set up when an address was tested by
7591 -bt or -bv, which affected the outcome if any router or filter referred to
7594 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7595 log only when "message" or "log_message" are set. However, if one of the
7596 conditions was an address verification, or a call to a nested ACL, the
7597 messages generated by the underlying test were being passed through. This
7598 no longer happens. The underlying message is available in $acl_verify_
7599 message for both "message" and "log_message" expansions, so it can be
7600 passed through if needed.
7602 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7603 new expansion $bh_ to give the encoded byte string without charset
7604 translation. Translation happens only if iconv() is available; HAVE_ICONV
7605 indicates this at build time. HEADERS_CHARSET gives the charset to
7606 translate to; headers_charset can change it in the configuration, and
7607 "headers charset" can change it in an individual filter file.
7609 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7610 that creates RFC 2047 encoded "words" labels them as that charset instead
7611 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7612 expansion operator; (ii) when Exim creates a From: line for a local
7613 message; (iii) when a header line is rewritten to include a "phrase" part.
7615 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7616 buggy, causing it to skip the first lines of messages whose message ID
7617 ended in 'D'. This would not have bitten before Exim release 4.14, because
7618 message IDs were unlikely to end in 'D' before then. The effect was to have
7619 incorrect size information for certain domains.
7621 45. #include "config.h" was missing at the start of the crypt16.c module. This
7622 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7625 46. If there was a timeout during a "random" callout check, Exim treated it as
7626 a failure of the random address, and carried on sending RSET and the real
7627 address. If the delay was just some slowness somewhere, the response to the
7628 original RCPT would be taken as a response to RSET and so on, causing
7629 mayhem of various kinds.
7631 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7632 when I implemented it. It didn't allow for the fact that some option values
7633 may legitimately be negative (e.g. size_addition), and it didn't even do
7634 the right test for positive values.
7636 48. Domain names in DNS records are case-independent. Exim always looks them up
7637 in lower case. Some resolvers return domain names in exactly the case they
7638 appear in the zone file, that is, they may contain uppercase letters. Not
7639 all resolvers do this - some return always lower case. Exim was treating a
7640 change of case by a resolver as a change of domain, similar to a widening
7641 of a domain abbreviation. This triggered its re-routing code and so it was
7642 trying to route what was effectively the same domain again. This normally
7643 caused routing to fail (because the router wouldn't handle the domain
7644 twice). Now Exim checks for this case specially, and just changes the
7645 casing of the domain that it ultimately uses when it transmits the message
7648 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7651 50. If a filter generated a file delivery with a non-absolute name (possible if
7652 no home directory exists for the router), the forbid_file option was not
7655 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7656 the existing equality matching.
7658 52. Exim was using ints instead of ino_t variables in some places where it was
7659 dealing with inode numbers.
7661 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7662 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7663 called TMPDIR, and if it finds it is different, it changes its value.
7665 54. The smtp_printf() function is now made available to local_scan() so
7666 additional output lines can be written before returning. There is also an
7667 smtp_fflush() function to enable the detection of a dropped connection.
7668 The variables smtp_input and smtp_batched_input are exported to
7671 55. Changed the default runtime configuration: the message "Unknown user"
7672 has been removed from the ACL, and instead placed on the localuser router,
7673 using the cannot_route_message feature. This means that any verification
7674 failures that generate their own messages won't get overridden. Similarly,
7675 the "Unrouteable address" message that was in the ACL for unverifiable
7676 relay addresses has also been removed.
7678 56. Added hosts_avoid_esmtp to the smtp transport.
7680 57. The exicyclog script was not checking for the esoteric option
7681 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7682 will work only if exicyclog is run under the appropriate euid.
7684 58. Following a discussion on the list, the rules by which Exim recognises line
7685 endings on incoming messages have been changed. The -dropcr and drop_cr
7686 options are now no-ops, retained only for backwards compatibility. The
7687 following line terminators are recognized: LF CRLF CR. However, special
7688 processing applies to CR:
7690 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7691 nor a local message in the state where . is a terminator.
7693 (ii) If a bare CR is encountered in a header line, an extra space is added
7694 after the line terminator so as not to end the header. The reasoning
7695 behind this is that bare CRs in header lines are most likely either
7696 to be mistakes, or people trying to play silly games.
7698 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7699 was being incorrectly given as 18 bytes larger than it should have been.
7700 This is a VOB (very old bug).
7702 60. This may never have affected anything current, but just in case it has:
7703 When the local host is found other than at the start of a list of hosts,
7704 the local host, those with the same MX, and any that follow, are discarded.
7705 When the list in question was part of a longer list of hosts, the following
7706 hosts (not currently being processed) were also being discarded. This no
7707 longer happens. I'm not sure if this situation could ever has previously
7710 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7713 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7714 header. This is something that is recommended in a new Internet Draft, and
7715 is something that is documented as being done by Sendmail. There are two
7716 possible values. For messages generated by the autoreply transport, Exim
7719 Auto-Submitted: auto-replied
7721 whereas for all other generated messages (e.g. bounces) it adds
7723 Auto-Submitted: auto-generated
7725 63. The "personal" condition in filters now includes a test for the
7726 Auto-Submitted: header. If it contains the string "auto-" the message it
7727 not considered personal.
7729 64. Added rcpt_include_affixes as a generic transport option.
7731 65. Added queue_only_override (default true).
7733 66. Added the syslog_duplication option.
7735 67. If what should have been the first header line of a message consisted of
7736 a space followed by a colon, Exim was mis-interpreting it as a header line.
7737 It isn't of course - it is syntactically invalid and should therefore be
7738 treated as the start of the message body. The misbehaviour could have
7739 caused a number of strange effects, including loss of data in subsequent
7740 header lines, and spool format errors.
7742 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7743 client host had authenticated. This control can now be exercised by an ACL
7744 for more flexibility.
7746 69. By default, callouts do not happen when testing with -bh. There is now a
7747 variant, -bhc, which does actually run the callout code, including
7748 consulting and updating the callout cache.
7750 70. Added support for saslauthd authentication, courtesy of Alexander
7753 71. If statvfs() failed on the spool or log directories while checking their
7754 size for availability, Exim confusingly gave the error "space shortage".
7755 Furthermore, in debugging mode it crashed with a floating point exception.
7756 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7757 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7758 serious problem, Exim now writes to the main and panic logs when this
7759 happens, with details of the failure. It then refuses to accept the
7760 incoming message, giving the message "spool directory problem" or "log
7761 directory problem" with a 421 code for SMTP messages.
7763 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7764 0, 1, and 2 exist, because some OS complain for execs without them (see
7765 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7766 descriptors. However, the code omitted to check that the open succeeded,
7767 causing mysterious errors if for some reason the permissions on /dev/null
7768 got screwed. Now Exim writes a message to the main and panic logs, and
7769 bombs out if it can't open /dev/null.
7771 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7772 interact so that it is all more flexible. It is supposed to remain
7773 backwards compatible. Also added extra_local_interfaces.
7775 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7776 to bomb out with an assertion failure - to the client this appears as a
7777 connection drop. This problem occurs in the part of the code that was taken
7778 from the Samba project. Fortunately, the assertion is in a very simple
7779 function, so I have fixed this by reproducing the function inline in the
7780 one place where it is called, and arranging for authentication to fail
7781 instead of killing the process with assert().
7783 75. The SPA client code was not working when the server requested OEM rather
7784 than Unicode encoding.
7786 76. Added code to make require_files with a specific uid setting more usable in
7787 the case where statting the file as root fails - usually a non-root-mounted
7788 NFS file system. When this happens and the failure is EACCES, Exim now
7789 forks a subprocess and does the per-uid checking as the relevant uid.
7791 77. Added process_log_path.
7793 78. If log_file_path was not explicitly set, a setting of check_log_space or
7794 check_log_inodes was ignored.
7796 79. If a space check for the spool or log partitions fails, the incident is now
7797 logged. Of course, in the latter case the data may get lost...
7799 80. Added the %p formatting code to string_format() so that it can be used to
7800 print addresses in debug_print(). Adjusted all the address printing in the
7801 debugging in store.c to use %p rather than %d.
7803 81. There was a concern that a line of code in smtp_in.c could overflow a
7804 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7805 initially expressed, the concern was not well-founded, because trailing
7806 spaces are removed early. However, if the trailing spaces were followed by
7807 a NULL, they did not get removed, so the overflow was possible. Two fixes
7810 (a) I re-wrote the offending code in a cleaner fashion.
7811 (b) If an incoming SMTP command contains a NULL character, it is rejected
7814 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7815 runs initgroups(), so that if the Exim user is in any additional groups,
7816 they will be used during message reception.
7822 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob