1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Avoid costly startup code when not strictly needed. This reduces time
12 for some exim process initialisations. It does mean that the logging
13 of TLS configuration problems is only done for the daemon startup.
15 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
21 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
22 side, to decode a TLS 1.3 packet capture.
24 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
25 Previously the default library behaviour applied, sending two, each in
28 JH/03 Debug output for ACL now gives the config file name and line number for
31 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
33 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
35 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
36 buffer overrun for (non-chunking) other transports.
38 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
39 TLS1.3, means that a server rejecting a client certificate is not visible
40 to the client until the first read of encrypted data (typically the
41 response to EHLO). Add detection for that case and treat it as a failed
42 TLS connection attempt, so that the normal retry-in-clear can work (if
45 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
46 and/or domain. Found and fixed by Jason Betts.
48 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
49 configuration). If a CNAME target was not a wellformed name pattern, a
52 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
53 the OS reports them interleaved with other addresses.
55 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
56 used both for input and for a verify callout, both encrypted, SMTP
57 responses being sent by the server could be lost. This resulted in
58 dropped connections and sometimes bounces generated by a peer sending
61 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
62 string. Previously it was possible to cause undefined behaviour in a
63 library routine (usually a crash). Found by "zerons".
65 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
68 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
69 API was removed, so update to use the newer ones.
71 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
72 any timeout set, is taking a long time. Previously we would hang on to a
73 rotated logfile "forever" if the input was arriving with long gaps
74 (a previous attempt to fix addressed lack, for a long time, of initial
77 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
78 shared (NFS) environment. The length of the tempfile name is now
79 4 + 16 ("hdr.$message_exim_id") which might break on file
80 systems which restrict the file name length to lower values.
83 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
84 shared (NFS) environment.
86 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
87 did for all versions <4.90). Notably -M, -m, --invert, -I may be
90 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
91 on some platforms for bit 31.
93 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
94 to changes apparently associated with TLS1.3 handling some of the APIs
95 previously used were either nonfunctional or inappropriate. Strings
96 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
97 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
98 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
99 This affects log line X= elements, the $tls_{in,out}_cipher variables,
100 and the use of specific cipher names in the encrypted= ACL condition.
102 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
104 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
105 verification result was not updated unless hosts_require_ocsp applied.
107 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
108 queue_list_requires_admin set to false, non-admin users were denied the
111 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
112 directory-of-certs mode. Previously they were advertised despite the
115 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
116 A single TCP connection by a client will now hold a TLS connection open
117 for multiple message deliveries, by default. Previoud the default was to
120 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
121 default. If built with the facility, DANE will be used. The facility
122 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
124 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
125 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
126 must be defined and you must still, unless you define DISABLE_TLS, manage
127 the the include-dir and library-file requirements that go with that
128 choice. Non-TLS builds are still supported.
130 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
133 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
134 default. If the platform supports and has the facility enabled, it will
135 be requested on all coneections.
137 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
138 controlled by the build-time option SUPPORT_PIPE_CONNECT.
140 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
142 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
143 success-DSN messages. Previously the From: header was always the default
144 one for these; the option was ignored.
146 JH/28 Fix the timeout on smtp response to apply to the whole response.
147 Previously it was reset for every read, so a teergrubing peer sending
148 single bytes within the time limit could extend the connection for a
149 long time. Credit to Qualsys Security Advisory Team for the discovery.
151 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
152 delivery address, which leaked information of the results of local
153 forwarding. Change to the original envelope recipient address, per
156 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
157 requested. Previously not bounce was generated and a log entry of
158 error ignored was made.
160 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
162 JH/32 Introduce a general tainting mechanism for values read from the input
163 channel, and values derived from them. Refuse to expand any tainted
164 values, to catch one form of exploit.
166 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
167 was unused and the unexpanded text used for the test. Found and
168 fixed by Ruben Jenster.
170 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
171 an attempt to use a TLS library read routine dereffed a nul pointer,
174 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
175 them in our smtp response.
177 JH/36 Have the general router option retry_use_local_part default to true when
178 any of the restrictive preconditions are set (to anything). Previously it
179 was only for check_local user. The change removes one item of manual
180 configuration which is required for proper retries when a remote router
181 handles a subset of addresses for a domain.
183 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
184 link count into consideration.
186 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
187 caused the extension of big_buffer, the following lines were ignored.
189 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
190 accordance with RFC 2308. Previously there was no expiry, so a longlived
191 receive process (eg. due to ACL delays) versus a short SOA value could
194 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
196 JH/39 Promote DMARC support to mainline.
198 JH/40 Bug 2452: Add a References: header to DSNs.
200 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
201 parameters. The relevant library call is documented as "Deprecated: This
202 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
203 3.6.0, DH parameters are negotiated following RFC7919."
209 JH/01 Remove code calling the customisable local_scan function, unless a new
210 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
212 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
213 non-signal-safe functions being used.
215 JH/03 Bug 2269: When presented with a received message having a stupidly large
216 number of DKIM-Signature headers, disable DKIM verification to avoid
217 a resource-consumption attack. The limit is set at twenty.
219 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
220 report of oldest_pass in ${authres } in consequence, and separate out
221 some descriptions of reasons for verification fail.
223 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
224 files in the spool were present and unlocked. A queue-runner could spot
225 them, resulting in a duplicate delivery. Fix that by doing the unlock
226 after the unlink. Investigation by Tim Stewart. Take the opportunity to
227 add more error-checking on spoolfile handling while that code is being
230 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
231 No known attacks, no CVE, this is defensive hardening.
233 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
234 a queue-runner could start a delivery while other operations were ongoing.
235 Cutthrough delivery was a common victim, resulting in duplicate delivery.
236 Found and investigated by Tim Stewart. Fix by using the open message data
237 file handle rather than opening another, and not locally closing it (which
238 releases a lock) for that case, while creating the temporary .eml format
239 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
241 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
242 $sender_verify_failure/$recipient_verify_failure to "random".
244 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
247 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
248 Previously this would segfault.
250 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
253 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
254 like zero, since the resolver should be doing this for us, But we need one
255 as a CNAME but no MX presence gets the CNAME returned; we need to check
256 that doesn't point to an MX to declare it "no MX returned" rather than
257 "error, loop". A new main option is added so the older capability of
258 following some limited number of chain links is maintained.
260 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
262 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
263 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
264 now-deprecated earlier definitions used only specified the range up to TLS
265 1.2 (in the older-version library docs).
267 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
269 JH/15 Rework TLS client-side context management. Stop using a global, and
270 explicitly pass a context around. This enables future use of TLS for
271 connections to service-daemons (eg. malware scanning) while a client smtp
272 connection is using TLS; with cutthrough connections this is quite likely.
274 JH/16 Fix ARC verification to do AS checks in reverse order.
276 JH/17 Support a "tls" option on the ${readsocket } expansion item.
278 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
279 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
280 Previously the "utf8" would be re-prepended for every additional message.
282 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
283 Previously thery were accepted, resulting in issues when attempting to
284 forward messages to a non-supporting MTA.
286 PP/02 Let -n work with printing macros too, not just options.
288 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
289 one parent address was copied, and bogus data was used at delivery-logging
290 time. Either a crash (after delivery) or bogus log data could result.
291 Discovery and analysis by Tim Stewart.
293 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
294 Previously if the string ended mid-character, we did not insert the
295 promised '?' replacement.
297 PP/04 Documentation: current string operators work on bytes, not codepoints.
299 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
300 should pack well giving a smaller memory footprint so better caching and
301 therefore performance. Group the declarations where this can't be done so
302 that the byte-sized flag variables are not interspersed among pointer
303 variables, giving a better chance of good packing by the compiler.
305 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
306 non-null, to avoid issues with sites running BATV. Previously reports were
307 sent with an empty envelope sender so looked like bounces.
309 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
310 The ignore_error flag wasn't being returned from the filter subprocess so
311 was not set for later routers. Investigation and fix by Matthias Kurz.
313 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
314 and a msg:complete for the whole, when a message is manually removed using
315 -Mrm. Developement by Matthias Kurz, hacked on by JH.
317 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
318 a "Gnu special" function, asprintf() in the DB utility binary builds; I
319 hope that is portable enough.
321 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
322 requiring a known-CA anchor certificate; make it now rely entirely on the
323 TLSA as an anchor. Checking the name on the leaf cert against the name
324 on the A-record for the host is still done for TA (but not for EE mode).
326 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
327 included in delivery lines for non-proxied connections, when compiled with
328 SUPPORT_SOCKS and running with proxy logging enabled.
330 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
331 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
332 move the existing event to fire before the normal logging of message
333 failure so that custom logging is bracketed by normal logging.
335 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
336 msg:fail:internal event. Developement by Matthias Kurz.
338 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
339 far too small for todays use of crypto signatures stored there. Go all
340 the way to the max DNS message size of 64kB, even though this might be
341 overmuch for IOT constrained device use.
343 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
344 copy a string over itself. The library routine is documented as not
345 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
347 JH/32 For main options check_spool_space and check_inode_space, where the
348 platform supports 64b integers, support more than the previous 2^31 kB
349 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
350 the previous G, M, k.
352 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
353 $authenticated_fail_id variable on authentication failure. Previously
356 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
357 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
358 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
359 GNUTLS_SEC_PARAM_MEDIUM.
361 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
362 side. Previously we would continue as if no SNI had been received.
364 JH/36 Harden the handling of string-lists. When a list consisted of a sole
365 "<" character, which should be a list-separator specification, we walked
366 off past the nul-terimation.
368 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
369 causes) even when the retry time is not yet met. Previously they were
370 not, meaning that when (say) an account was over-quota and temp-rejecting,
371 and multiple senders' messages were queued, only one sender would get
372 notified on each configured delay_warning cycle.
374 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
376 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
377 cipher-suites, an error can be left on the stack even for a succeeding
378 accept; this results in impossible error messages when a later operation
381 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
382 return error codes indicating retry. Under TLS1.3 this becomes required.
384 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
385 it only wrote the new authenticators, resulting in a lack of tracking of
386 peer changes of ESMTP extensions until the next cache flush.
388 JH/41 Fix the loop reading a message header line to check for integer overflow,
389 and more-often against header_maxsize. Previously a crafted message could
390 induce a crash of the recive process; now the message is cleanly rejected.
392 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
393 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
399 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
400 When redis_servers is set to a list of > 1 element, and the Redis servers
401 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
402 case of MOVED into a DEFER case instead, thus moving the query onto the
403 next server in the list. For a cluster of N elements, all N servers must
404 be defined in redis_servers.
406 GF/02 Catch and remove uninitialized value warning in exiqsumm
407 Check for existence of @ARGV before looking at $ARGV[0]
409 JH/01 Replace the store_release() internal interface with store_newblock(),
410 which internalises the check required to safely use the old one, plus
411 the allocate and data copy operations duplicated in both (!) of the
412 extant use locations.
414 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
415 modifier. This matches the restriction on the commandline.
417 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
418 Previously only the last row was returned.
420 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
421 we assumed that tags in the header were well-formed, and parsed the
422 element content after inspecting only the first char of the tag.
423 Assumptions at that stage could crash the receive process on malformed
426 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
427 While running the DKIM ACL we operate on the Permanent memory pool so that
428 variables created with "set" persist to the DATA ACL. Also (at any time)
429 DNS lookups that fail create cache records using the Permanent pool. But
430 expansions release any allocations made on the current pool - so a dnsdb
431 lookup expansion done in the DKIM ACL releases the memory used for the
432 DNS negative-cache, and bad things result. Solution is to switch to the
433 Main pool for expansions.
434 While we're in that code, add checks on the DNS cache during store_reset,
435 active in the testsuite.
436 Problem spotted, and debugging aided, by Wolfgang Breyha.
438 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
439 When none of the hosts presented to a transport match an already-open
440 connection, close it and proceed with the list. Previously we would
441 queue the message. Spotted by Lena with Yahoo, probably involving
444 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
445 Previously a spurious "250 OK id=" response was appended to the proper
448 JH/08 The "support for" informational output now, which built with Content
449 Scanning support, has a line for the malware scanner interfaces compiled
450 in. Interface can be individually included or not at build time.
452 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
453 by the template makefile "src/EDITME". The "STREAM" support for an older
454 ClamAV interface method is removed.
456 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
457 rows affected is given instead).
459 JH/11 The runtime Berkeley DB library version is now additionally output by
460 "exim -d -bV". Previously only the compile-time version was shown.
462 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
463 SMTP connection. Previously, when one had more receipients than the
464 first, an abortive onward connection was made. Move to full support for
465 multiple onward connections in sequence, handling cutthrough connection
466 for all multi-message initiating connections.
468 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
469 routers. Previously, a multi-recipient message would fail to match the
470 onward-connection opened for the first recipient, and cause its closure.
472 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
473 a timeout on read on a GnuTLS initiating connection, resulting in the
474 initiating connection being dropped. This mattered most when the callout
475 was marked defer_ok. Fix to keep the two timeout-detection methods
478 JH/15 Relax results from ACL control request to enable cutthrough, in
479 unsupported situations, from error to silently (except under debug)
480 ignoring. This covers use with PRDR, frozen messages, queue-only and
483 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
485 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
486 metadata, resulting in a crash in free().
488 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
489 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
490 Broken also in d185889f4, with init system revamp.
492 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
493 Previously we abruptly closed the connection after reading a malware-
494 found indication; now we go on to read the "scan ok" response line,
497 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
498 ACL. Previously, a crash would result.
500 JH/19 Speed up macro lookups during configuration file read, by skipping non-
501 macro text after a replacement (previously it was only once per line) and
502 by skipping builtin macros when searching for an uppercase lead character.
504 JH/20 DANE support moved from Experimental to mainline. The Makefile control
505 for the build is renamed.
507 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
508 was allocated for every new TLS startup, meaning one per message. Fix
509 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
511 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
512 reported the original. Fix to report (as far as possible) the ACL
513 result replacing the original.
515 JH/23 Fix memory leak during multi-message connections using STARTTLS under
516 OpenSSL. Certificate information is loaded for every new TLS startup,
517 and the resources needed to be freed.
519 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
521 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
524 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
525 DATA response info to the (existing) per-recipient response info for
526 the "C=" log element. It can have useful tracking info from the
527 destination system. Patch from Simon Arlott.
529 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
530 length value. Previously this would segfault.
532 HS/02 Support Avast multiline protoocol, this allows passing flags to
533 newer versions of the scanner.
535 JH/28 Ensure that variables possibly set during message acceptance are marked
536 dead before release of memory in the daemon loop. This stops complaints
537 about them when the debug_store option is enabled. Discovered specifically
538 for sender_rate_period, but applies to a whole set of variables.
539 Do the same for the queue-runner and queue-list loops, for variables set
540 from spool message files. Do the same for the SMTP per-message loop, for
541 certain variables indirectly set in ACL operations.
543 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
544 as a multi-recipient message from a mailinglist manager). The coding had
545 an arbitrary cutoff number of characters while checking for more input;
546 enforced by writing a NUL into the buffer. This corrupted long / fast
547 input. The problem was exposed more widely when more pipelineing of SMTP
548 responses was introduced, and one Exim system was feeding another.
549 The symptom is log complaints of SMTP syntax error (NUL chars) on the
550 receiving system, and refused recipients seen by the sending system
551 (propating to people being dropped from mailing lists).
552 Discovered and pinpointed by David Carter.
554 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
555 replaced by the ${authresults } expansion.
557 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
559 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
560 allows proper process termination in container environments.
562 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
563 Previously the "final dot" had a newline after it; ensure it is CR,LF.
565 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
566 and "err_perm", deprecated since 4.83 when the RFC-defined words
567 "temperror" and "permerror" were introduced.
569 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
570 transport-filters or DKIM-signing. The restriction was lost in the
571 consolidation of verify-callout and delivery SMTP handling.
572 Extend the restriction to also cover ARC-signing.
574 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
575 in defer=pass mode supply a 450 to the initiator. Previously the message
578 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
579 tls_require_ciphers is used as before.
581 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
582 "pass_unscanned". Only tmpfails from the scanner are written to
583 the paniclog, as they may require admin intervention (permission
584 denied, license issues). Other scanner errors (like decompression
585 bombs) do not cause a paniclog entry.
587 JH/36 Fix reinitialisation of DKIM logging variable between messages.
588 Previously it was possible to log spurious information in receive log
591 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
592 triggered odd behaviour from Outlook Express clients.
594 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
597 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
598 since the IETF WG has not yet settled on that versus the original
599 "bare" representation.
601 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
602 Previously the millisecond value corrupted the output.
603 Fix also for syslog_pid=no and log_selector +pid, for which the pid
604 corrupted the output.
610 JH/01 Rework error string handling in TLS interface so that the caller in
611 more cases is responsible for logging. This permits library-sourced
612 string to be attached to addresses during delivery, and collapses
613 pairs of long lines into single ones.
615 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
616 during configuration. Wildcards are allowed and expanded.
618 JH/02 Rework error string handling in DKIM to pass more info back to callers.
619 This permits better logging.
621 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
622 do not close it down and have the child transport start it up again on
623 the passed-on TCP connection. Instead, proxy the child (and any
624 subsequent ones) for TLS via a unix-domain socket channel. Logging is
625 affected: the continued delivery log lines do not have any DNSSEC, TLS
626 Certificate or OCSP information. TLS cipher information is still logged.
628 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
629 identical IP addresses on different listening ports. Will also affect
632 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
633 add noisy ifdef guards to special-case this sillyness.
634 Patch from Bernd Kuhls.
636 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
637 than 255 are no longer allowed.
639 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
640 Disable the session-cache too, which might reduce our load. Since we
641 currrectly use a new context for every connection, both as server and
642 client, there is no benefit for these.
643 GnuTLS appears to not support tickets server-side by default (we don't
644 call gnutls_session_ticket_enable_server()) but client side is enabled
645 by default on recent versions (3.1.3 +) unless the PFS priority string
648 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
649 <https://reproducible-builds.org/specs/source-date-epoch/>.
651 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
652 the check for any unsuccessful recipients did not notice the limit, and
653 erroneously found still-pending ones.
655 JH/08 Pipeline CHUNKING command and data together, on kernels that support
656 MSG_MORE. Only in-clear (not on TLS connections).
658 JH/09 Avoid using a temporary file during transport using dkim. Unless a
659 transport-filter is involved we can buffer the headers in memory for
660 creating the signature, and read the spool data file once for the
661 signature and again for transmission.
663 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
664 4.77 as the kernel support then wasn't solid, having issues in 64bit
665 mode. Now, it's been long enough. Add support for FreeBSD also.
667 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
668 case where the routing stage had gathered several addresses to send to
669 a host before calling the transport for the first, we previously failed
670 to close down TLS in the old transport process before passing the TCP
671 connection to the new process. The new one sent a STARTTLS command
672 which naturally failed, giving a failed delivery and bloating the retry
673 database. Investigation and fix prototype from Wolfgang Breyha.
675 JH/12 Fix check on SMTP command input synchronisation. Previously there were
676 false-negatives in the check that the sender had not preempted a response
677 or prompt from Exim (running as a server), due to that code's lack of
678 awareness of the SMTP input buffering.
680 PP/04 Add commandline_checks_require_admin option.
681 Exim drops privileges sanely, various checks such as -be aren't a
682 security problem, as long as you trust local users with access to their
683 own account. When invoked by services which pass untrusted data to
684 Exim, this might be an issue. Set this option in main configuration
685 AND make fixes to the calling application, such as using `--` to stop
688 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
689 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
690 responses to those, into a single TLS record each way (this usually means
691 a single packet). As a side issue, smtp_enforce_sync now works on TLS
694 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
695 affects you only if you're dancing at the edge of the param size limits.
696 If you are, and this message makes sense to you, then: raise the
697 configured limit or use OpenSSL 1.1. Nothing we can do for older
700 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
701 cmdline element to get the documented default one. Previously it was
704 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
705 are unsuable for non-message-specific reasons - eg. connection timeout,
706 banner-time rejection.
708 JH/16 Fix logging of delivery remote port, when specified by router, under
711 PP/06 Repair manualroute's ability to take options in any order, even if one
712 is the name of a transport.
715 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
717 JH/17 Change the list-building routines interface to use the expanding-string
718 triplet model, for better allocation and copying behaviour.
720 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
721 Previously it was constructed the first time a possibly-matching string
722 was met in the configuration file input during startup; now it is done
725 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
726 compatible one, to avoid the (poorly documented) possibility of a config
727 file in the working directory redirecting the DB files, possibly correpting
728 some existing file. CVE-2017-10140 assigned for BDB.
730 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
731 cache-hot. Previously, although the result was properly cached, the
732 initial verify call returned a defer.
734 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
735 the main verify for receipient in uncached-mode.
737 JH/22 Retire historical build files to an "unsupported" subdir. These are
738 defined as "ones for which we have no current evidence of testing".
740 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
741 if present. Previously it was ignored.
743 JH/24 Start using specified-initialisers in C structure init coding. This is
744 a C99 feature (it's 2017, so now considered safe).
746 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
747 if was a fixed-sized field and bitmask ops via macros; it is now more
750 PP/07 GitHub PR 56: Apply MariaDB build fix.
751 Patch provided by Jaroslav Škarvada.
753 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
754 during Coverity cleanups [4.87 JH/47]
755 Diagnosis and fix provided by Michael Fischer v. Mollard.
757 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
758 the right size to place the terminating semicolon on its own folded
759 line, the header hash was calculated to an incorrect value thanks to
760 the (relaxed) space the fold became.
762 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
763 and confused the parent.
765 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
766 which could crash as a result. This could lead to undeliverable messages.
768 JH/28 Logging: "next input sent too soon" now shows where input was truncated
771 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
772 matters on fast-turnover and PID-randomising systems, which were getting
773 out-of-order delivery.
775 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
776 a possibly-overlapping copy. The symptom was that "Remote host closed
777 connection in response to HELO" was logged instead of the actual 4xx
780 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
781 Previously only that bufferd was discarded, resulting in SYMTP command
784 JH/32 DKIM: when a message has multiple signatures matching an identity given
785 in dkim_verify_signers, run the dkim acl once for each. Previously only
786 one run was done. Bug 2189.
788 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
789 "panic the current process" to "deliberately defer". The panic log is
790 still written with the problem list name; the mail and reject logs now
791 get a temp-reject line for the message that was being handled, saying
792 something like "domains check lookup or other defer". The SMTP 451
793 message is still "Temporary local problem".
795 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
796 A crafted sequence of BDAT commands could result in in-use memory beeing
797 freed. CVE-2017-16943.
799 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
800 from SMTP input. Previously it was always done; now only done for DATA
801 and not BDAT commands. CVE-2017-16944.
803 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
804 to the message (such as an overlong header line). Previously this was
805 not done and we did not exit BDAT mode. Followon from the previous item
806 though a different problem.
812 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
813 than -2003 did; needs libidn2 in addition to libidn.
815 JH/02 The path option on a pipe transport is now expanded before use.
817 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
818 Patch provided by "Björn", documentation fix added too.
820 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
821 missing a wire-to-host endian conversion.
823 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
824 close after a BDAT command line could be taken as a following command,
825 giving a synch failure. Fix by only checking for synch immediately
826 before acknowledging the chunk.
828 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
829 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
830 macro. Patches provided by Josh Soref.
832 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
833 Previously we did not; the RFC seems ambiguous and VRFY is not listed
834 by IANA as a service extension. However, John Klensin suggests that we
837 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
838 the dkim code may be unix-mode line endings rather than smtp wire-format
839 CRLF, so prepend a CR to any bare LF.
841 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
842 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
844 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
845 the first were themselves being wrongly included in the feed into dkim
846 processing; with most chunk sizes in use this resulted in an incorrect
847 body hash calculated value.
849 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
850 DKIM signature block, for verification. Although advised against by
851 standards it is specifically not ruled illegal.
853 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
855 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
856 missing a body hash (the bh= tag).
858 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
859 It seems that HAProxy sends the Proxy Protocol information in clear and
860 only then does a TLS startup, so do the same.
862 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
863 TCP connections (such as for Spamd) unless the daemon successfully set
864 Fast Open mode on its listening sockets. This fixes breakage seen on
865 too-old kernels or those not configured for Fast Open, at the cost of
866 requiring both directions being enabled for TFO, and TFO never being used
867 by non-daemon-related Exim processes.
869 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
870 endings, at least on the first header line. Try to canonify any that get
871 past that check, despite the cost.
873 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
874 now limited to an arbitrary five deep, while parsing addresses with the
875 strip_excess_angle_brackets option enabled.
877 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
878 instead leave the unprompted TLS handshake in socket buffer for the
879 TLS library to consume.
881 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
883 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
885 JH/16 Drop variables when they go out of scope. Memory management drops a whole
886 region in one operation, for speed, and this leaves assigned pointers
887 dangling. Add checks run only under the testsuite which checks all
888 variables at a store-reset and panics on a dangling pointer; add code
889 explicitly nulling out all the variables discovered. Fixes one known
890 bug: a transport crash, where a dangling pointer for $sending_ip_address
891 originally assigned in a verify callout, is re-used.
893 PP/06 Drop '.' from @INC in various Perl scripts.
895 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
897 PP/08 Reduce a number of compilation warnings under clang; building with
898 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
899 should be warning-free.
901 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
903 HS/01 Fix portability problems introduced by PP/08 for platforms where
904 realloc(NULL) is not equivalent to malloc() [SunOS et al].
906 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
907 chunk. This allows us to accept broken chunked messages. We need a more
908 general solution here.
910 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
911 already-broken messages in the queue.
913 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
915 JH/19 Fix reference counting bug in routing-generated-address tracking.
921 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
922 supports it and a size is available (ie. the sending peer gave us one).
924 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
925 years of being deprecated). The replacements are the ACLs
926 acl_smtp_mime and acl_not_smtp_mime.
928 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
929 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
930 or even an in-clear connection were permitted. Now, if the host lookup
931 was dnssec and dane was requested then the host is only used if the
932 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
933 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
934 if one fails this test.
935 This means that a poorly-configured remote DNS will make it incommunicado;
936 but it protects against a DNS-interception attack on it.
938 JH/04 Bug 1810: make continued-use of an open smtp transport connection
939 non-noisy when a race steals the message being considered.
941 JH/05 If main configuration option tls_certificate is unset, generate a
942 self-signed certificate for inbound TLS connections.
944 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
945 in rewrites and routers.
947 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
948 and logged a warning sing 4.83; now they are a configuration file error.
950 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
951 (lacking @domain). Apply the same qualification processing as RCPT.
953 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
955 JH/10 Support ${sha256:} applied to a string (as well as the previous
958 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
959 a cutthrough deliver is pending, as we always want to make a connection.
960 This also avoids re-routing the message when later placing the cutthrough
961 connection after a verify cache hit.
962 Do not update it with the verify result either.
964 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
965 when routing results in more than one destination address.
967 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
968 signing (which inhibits the cutthrough capability). Previously only
969 the presence of an option was tested; now an expansion evaluating as
970 empty is permissible (obviously it should depend only on data available
971 when the cutthrough connection is made).
973 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
974 the relevant preceding SMTP command did not note the pipelining mode.
976 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
977 Previously they were not counted.
979 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
980 as one having no matching records. Previously we deferred the message
981 that needed the lookup.
983 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
984 distinguished as "(=".
986 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
987 for missing MX records. Previously it only worked for missing A records.
989 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
991 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
992 after the data-go-ahead and data-ack. Patch from Jason Betts.
994 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
995 even for a "none" policy. Patch from Tony Meyer.
997 JH/22 Fix continued use of a connection for further deliveries. If a port was
998 specified by a router, it must also match for the delivery to be
1001 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1002 When one of the recipients of a message was unsuitable for the connection
1003 (has no matching addresses), we lost track of needing to mark it
1004 deferred. As a result mail would be lost.
1006 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1008 JH/25 Decoding ACL controls is now done using a binary search; the source code
1009 takes up less space and should be simpler to maintain. Merge the ACL
1010 condition decode tables also, with similar effect.
1012 JH/26 Fix problem with one_time used on a redirect router which returned the
1013 parent address unchanged. A retry would see the parent address marked as
1014 delivered, so not attempt the (identical) child. As a result mail would
1017 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1018 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1019 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1022 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1023 Main config options check_{log,spool}_{inodes,space} are now
1024 100 inodes, 10MB unless set otherwise in the configuration.
1026 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1027 Previously it only applied to the main-section connection policy
1030 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1032 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1033 by me. Added RFC7919 DH primes as an alternative.
1035 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1036 are not in the system include path.
1038 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1039 GnuTLS, when a session startup failed (eg because the client disconnected)
1040 Exim did stdio operations after fclose. This was exposed by a recent
1041 change which nulled out the file handle after the fclose.
1043 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1044 signed directly by the cert-signing cert, rather than an intermediate
1045 OCSP-signing cert. This is the model used by LetsEncrypt.
1047 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1049 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1050 an incoming connection.
1052 HS/02 Bug 1802: Do not half-close the connection after sending a request
1055 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1056 fallback to "prime256v1".
1058 JH/34 SECURITY: Use proper copy of DATA command in error message.
1059 Could leak key material. Remotely exploitable. CVE-2016-9963.
1065 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1066 and 3.4.4 - once the server is enabled to respond to an OCSP request
1067 it does even when not requested, resulting in a stapling non-aware
1068 client dropping the TLS connection.
1070 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1071 support variable-length bit vectors. No functional change.
1073 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1074 The I= interface field on outgoing lines is now after the H= remote
1075 host field, same as incoming lines. There is a separate
1076 outgoing_interface log selector which allows you to disable the
1079 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1080 If not running log_selector +smtp_connection the mainlog would be held
1081 open indefinitely after a "too many connections" event, including to a
1082 deleted file after a log rotate. Leave the per net connection logging
1083 leaving it open for efficiency as that will be quickly detected by the
1084 check on the next write.
1086 HS/01 Bug 1671: Fix post transport crash.
1087 Processing the wait-<transport> messages could crash the delivery
1088 process if the message IDs didn't exist for some reason. When
1089 using 'split_spool_directory=yes' the construction of the spool
1090 file name failed already, exposing the same netto behaviour.
1092 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1093 mime_regex ACL conditions.
1095 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1096 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1097 to HELO, local diagnostic string.
1099 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1100 log line to debug. Even when configured with a tls authenticator many
1101 client connections are expected to not authenticate in this way, so
1102 an authenticate fail is not an error.
1104 HS/02 Add the Exim version string to the process info. This way exiwhat
1105 gives some more detail about the running daemon.
1107 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1108 matter for fast-change records such as DNSBLs.
1110 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1111 retry record, even if constant. There may be multiple transports with
1112 different interface settings and the retry behaviour needs to be kept
1115 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1117 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1119 JH/10 Bug 840: fix log_defer_output option of pipe transport
1121 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1122 hosts_randomize. This matters a lot when combined with mua_wrapper.
1124 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1125 ${quote_pgsql:<string>} operator.
1127 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1129 JH/14 Change header file name for freeradius-client. Relevant if compiling
1130 with Radius support; from the Gentoo tree and checked under Fedora.
1132 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1134 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1135 option transport_filter, meaning no filtering.
1137 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1139 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1140 defaults to "*" (all hosts). The variable is now available when not built
1141 with TLS, default unset, mainly to enable keeping the testsuite sane.
1142 If a server certificate is not supplied (via tls_certificate) an error is
1143 logged, and clients will find TLS connections fail on startup. Presumably
1144 they will retry in-clear.
1145 Packagers of Exim are strongly encouraged to create a server certificate
1146 at installation time.
1148 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1149 with the $config_file variable.
1151 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1152 in transport context, after the attempt, and per-recipient. The latter type
1153 is per host attempted. The event data is the error message, and the errno
1154 information encodes the lookup type (A vs. MX) used for the (first) host,
1155 and the trailing two digits of the smtp 4xx response.
1157 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1158 to write to mainlog (or rejectlog, paniclog) in the window between file
1159 creation and permissions/ownership being changed. Particularly affects
1160 installations where exicyclog is run as root, rather than exim user;
1161 result is that the running daemon panics and dies.
1163 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1165 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1166 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1167 "pri" and "weight". Note that the previous implicit priority given by the
1168 list order is no longer honoured.
1170 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1171 for DKIM processing.
1173 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1174 by defining SUPPORT_SOCKS.
1176 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1177 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1178 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1179 variables are renamed to proxy_{local,external}_{address,port}.
1181 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1182 for a build by defining SUPPORT_I18N
1184 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1185 of the query string, and make ${quote_redis:} do that quoting.
1187 JH/29 Move Events support from Experimental to mainline, enabled by default
1188 and removable for a build by defining DISABLE_EVENT.
1190 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1192 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1193 cached by the daemon.
1195 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1196 by defining LOOKUP_REDIS. The libhiredis library is required.
1198 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1199 keys are given for lookup.
1201 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1202 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1203 only supported when built with TLS support. The PolarSSL SHA routines
1204 are still used when the TLS library is too old for convenient support.
1206 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1207 openssl_options), for security. OpenSSL forces this from version 1.1.0
1208 server-side so match that on older versions.
1210 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1211 allocation for $value could be released as the expansion processing
1212 concluded, but leaving the global pointer active for it.
1214 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1215 and to use the domains and local_parts ACL conditions.
1217 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1218 incorrectly not doubled on cutthrough transmission, hence seen as a
1219 body-termination at the receiving system - resulting in truncated mails.
1220 Commonly the sender saw a TCP-level error, and retransmitted the message
1221 via the normal store-and-forward channel. This could result in duplicates
1222 received - but deduplicating mailstores were liable to retain only the
1223 initial truncated version.
1225 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1227 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1229 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1230 we're in there, support oversigning also; bug 1309.
1232 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1234 HS/04 Add support for keep_environment and add_environment options.
1236 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1237 either intentional arithmetic overflow during PRNG, or testing config-
1240 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1241 delivery resulted in actual delivery. Cancel cutthrough before DATA
1244 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1245 rejects a recipient: pass the reject to the originator.
1247 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1248 Many were false-positives and ignorable, but it's worth fixing the
1251 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1252 for the new environment-manipulation done at startup. Move the routines
1253 from being local to tls.c to being global via the os.c file.
1255 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1256 an extract embedded as result-arg for a map, the first arg for extract
1257 is unavailable so we cannot tell if this is a numbered or keyed
1258 extraction. Accept either.
1264 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1267 JH/02 The smtp transport option "multi_domain" is now expanded.
1269 JH/03 The smtp transport now requests PRDR by default, if the server offers
1272 JH/04 Certificate name checking on server certificates, when exim is a client,
1273 is now done by default. The transport option tls_verify_cert_hostnames
1274 can be used to disable this per-host. The build option
1275 EXPERIMENTAL_CERTNAMES is withdrawn.
1277 JH/05 The value of the tls_verify_certificates smtp transport and main options
1278 default to the word "system" to access the system default CA bundle.
1279 For GnuTLS, only version 3.0.20 or later.
1281 JH/06 Verification of the server certificate for a TLS connection is now tried
1282 (but not required) by default. The verification status is now logged by
1283 default, for both outbound TLS and client-certificate supplying inbound
1286 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1289 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1290 Status Notification (bounce) messages are now MIME format per RFC 3464.
1291 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1292 under the control of the dsn_advertise_hosts option, and routers may
1293 have a dsn_lasthop option.
1295 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1296 default, modifiable by a malware= option. The list separator for
1297 the options can now be changed in the usual way. Bug 68.
1299 JH/10 The smtp_receive_timeout main option is now expanded before use.
1301 JH/11 The incoming_interface log option now also enables logging of the
1302 local interface on delivery outgoing connections.
1304 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1305 if the interface and destination host and port all match.
1307 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1310 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1311 Patch from Andrew Lewis.
1313 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1314 now supports optional time-restrictions, weighting, and priority
1315 modifiers per server. Patch originally by <rommer@active.by>.
1317 JH/16 The spamd_address main option now supports a mixed list of local
1318 and remote servers. Remote servers can be IPv6 addresses, and
1319 specify a port-range.
1321 JH/17 Bug 68: The spamd_address main option now supports an optional
1322 timeout value per server.
1324 JH/18 Bug 1581: Router and transport options headers_add/remove can
1325 now have the list separator specified.
1327 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1330 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1333 JH/21 Support for the A6 type of dns record is withdrawn.
1335 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1336 rather than the verbs used.
1338 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1339 from 255 to 1024 chars.
1341 JH/24 Verification callouts now attempt to use TLS by default.
1343 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1344 are generic router options now. The defaults didn't change.
1346 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1347 Original patch from Alexander Shikoff, worked over by JH.
1349 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1350 files if ZCAT_COMMAND is not executable.
1352 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1354 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1356 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1357 Normally benign, it bites when the pair was led to by a CNAME;
1358 modern usage is to not canonicalize the domain to a CNAME target
1359 (and we were inconsistent anyway for A-only vs AAAA+A).
1361 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1363 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1364 when evaluating $sender_host_dnssec.
1366 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1367 $sender_helo_dnssec variable.
1369 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1371 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1373 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1375 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1376 documented as working, but never had. Support all but $spam_report.
1378 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1379 added for tls authenticator.
1381 HS/03 Add perl_taintmode main config option
1387 TL/01 When running the test suite, the README says that variables such as
1388 no_msglog_check are global and can be placed anywhere in a specific
1389 test's script, however it was observed that placement needed to be near
1390 the beginning for it to behave that way. Changed the runtest perl
1391 script to read through the entire script once to detect and set these
1392 variables, reset to the beginning of the script, and then run through
1393 the script parsing/test process like normal.
1395 TL/02 The BSD's have an arc4random API. One of the functions to induce
1396 adding randomness was arc4random_stir(), but it has been removed in
1397 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1398 function when detected.
1400 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1401 cause callback expansion.
1403 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1404 syntax errors in an expansion can be treated as a string instead of
1405 logging or causing an error, due to the internal use of bool_lax
1406 instead of bool when processing it.
1408 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1409 server certificates when making smtp deliveries.
1411 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1413 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1415 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1417 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1418 Merged patch from Sebastian Wiedenroth.
1420 JH/05 Fix results-pipe from transport process. Several recipients, combined
1421 with certificate use, exposed issues where response data items split
1422 over buffer boundaries were not parsed properly. This eventually
1423 resulted in duplicates being sent. This issue only became common enough
1424 to notice due to the introduction of connection certificate information,
1425 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1427 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1428 size buffer was used, resulting in syntax errors when an expansion
1431 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1432 version 3.3.6 or later.
1434 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1435 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1436 both become "event_action", the variables become $event_name, $event_data
1437 and $event_defer_errno. There is a new variable $verify_mode, usable in
1438 routers, transports and related events. The tls:cert event is now also
1439 raised for inbound connections, if the main configuration event_action
1442 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1443 early OCSP support, but no stapling (appears to be less than 1.0.0).
1445 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1446 server certificate names available under the smtp transport option
1447 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1450 JH/10 Time-related extraction expansions from certificates now use the main
1451 option "timezone" setting for output formatting, and are consistent
1452 between OpenSSL and GnuTLS compilations. Bug 1541.
1454 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1455 encoded parameter in the incoming message. Bug 1558.
1457 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1458 include certificate info, eximon was claiming there were spoolfile
1461 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1463 JH/14 Log delivery-related information more consistently, using the sequence
1464 "H=<name> [<ip>]" wherever possible.
1466 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1467 are problematic for Debian distribution, omit them from the release
1470 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1472 JH/16 Fix string representation of time values on 64bit time_t architectures.
1475 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1476 output list separator was used.
1481 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1482 checkers that were complaining about end of non-void function with no
1485 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1486 This was a regression introduced in 4.83 by another bugfix.
1488 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1490 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1491 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1497 TF/01 Correctly close the server side of TLS when forking for delivery.
1499 When a message was received over SMTP with TLS, Exim failed to clear up
1500 the incoming connection properly after forking off the child process to
1501 deliver the message. In some situations the subsequent outgoing
1502 delivery connection happened to have the same fd number as the incoming
1503 connection previously had. Exim would try to use TLS and fail, logging
1504 a "Bad file descriptor" error.
1506 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1507 utilities have not been installed.
1509 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1510 temporary space as the ACL may create new global variables.
1512 TL/01 LDAP support uses per connection or global context settings, depending
1513 upon the detected version of the libraries at build time.
1515 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1516 to extract and use the src ip:port in logging and expansions as if it
1517 were a direct connection from the outside internet. PPv2 support was
1518 updated based on HAProxy spec change in May 2014.
1520 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1522 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1523 Properly escape header and check for NULL return.
1525 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1528 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1530 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1531 characters in header names, implemented as a verify condition.
1532 Contributed by Michael Fischer v. Mollard.
1534 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1535 results permerror and temperror. Previous values are deprecated but
1536 still accepted. In a future release, err_perm and err_temp will be
1537 completely removed, which will be a backward incompatibility if the
1538 ACL tests for either of these two old results. Patch contributed by
1539 user bes-internal on the mailing list.
1541 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1543 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1544 selectors, in both main and reject logs.
1546 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1549 JH/07 Add malware type "sock" for talking to simple daemon.
1551 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1553 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1554 routers/transports under cutthrough routing.
1556 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1557 numbers. Touch up "bool" conditional to keep the same definition.
1559 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1561 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1563 JH/12 Expand items in router/transport headers_add or headers_remove lists
1564 individually rather than the list as a whole. Bug 1452.
1566 Required for reasonable handling of multiple headers_ options when
1567 they may be empty; requires that headers_remove items with embedded
1568 colons must have them doubled (or the list-separator changed).
1570 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1571 view the policy declared in the DMARC record. Currently, $dmarc_status
1572 is a combined value of both the record presence and the result of the
1575 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1577 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1578 dnslookup router and the smtp transport (applying to the forward
1581 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1582 of ldap servers used for a specific lookup. Patch provided by Heiko
1585 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1586 New variable $lookup_dnssec_authenticated for observability.
1588 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1589 Patch submitted by Lars Timman.
1591 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1593 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1594 Requires trusted mode and valid format message id, aborts otherwise.
1595 Patch contributed by Heiko Schlichting.
1597 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1598 certextract with support for various fields. Bug 1358.
1600 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1601 is requested by default, modifiable by smtp transport option
1604 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1605 operate on certificate variables to give certificate fingerprints
1606 Also new ${sha256:cert_variable}.
1608 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1610 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1611 Christian Aistleitner.
1613 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1615 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1616 file. Patch from Wolfgang Breyha.
1618 JH/25 Expand the coverage of the delivery $host and $host_address to
1619 client authenticators run in verify callout. Bug 1476.
1621 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1622 align with daemon_smtp_ports. Bug 72.
1624 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1625 support and error reporting did not work properly.
1627 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1628 and is readable. Patch from Andrew Colin Kissa.
1630 TL/14 Enhance documentation of ${run expansion and how it parses the
1631 commandline after expansion, particularly in the case when an
1632 unquoted variable expansion results in an empty value.
1634 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1636 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1637 by renaming away from it. Addresses GH issue 15, reported by
1640 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1642 TL/15 SECURITY: prevent double expansion in math comparison functions
1643 (can expand unsanitized data). Not remotely exploitable.
1650 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1652 PP/02 Make -n do something, by making it not do something.
1653 When combined with -bP, the name of an option is not output.
1655 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1658 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1659 $sender_host_name and config options to manage this, and basic check
1662 PP/05 DSCP support for outbound connections and control modifier for inbound.
1664 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1665 (Only plugin which currently uses this is kerberos4, which nobody should
1666 be using, but we should make it available and other future plugins might
1667 conceivably use it, even though it would break NAT; stuff *should* be
1668 using channel bindings instead).
1670 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1671 name; added for Sendmail compatibility; requires admin caller.
1672 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1673 just ignore it); requires trusted caller.
1674 Also parse but ignore: -Ac -Am -X<logfile>
1677 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1679 TL/02 Add +smtp_confirmation as a default logging option.
1681 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1682 Patch by Magnus Holmgren from 2007-02-20.
1684 TL/04 Bugzilla 1281 - Spec typo.
1685 Bugzilla 1283 - Spec typo.
1686 Bugzilla 1290 - Spec grammar fixes.
1688 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1690 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1692 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1693 mailing list by by Dmitry Isaikin.
1695 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1697 JH/02 Support "G" suffix to numbers in ${if comparisons.
1699 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1701 NM/01 Bugzilla 1197 - Spec typo
1702 Bugzilla 1196 - Spec examples corrections
1704 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1706 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1707 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1710 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1711 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1713 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1714 "acl {{name}{arg}...}", and optional args on acl condition
1717 JH/05 Permit multiple router/transport headers_add/remove lines.
1719 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1721 JH/07 Avoid using a waiting database for a single-message-only transport.
1722 Performance patch from Paul Fisher. Bugzilla 1262.
1724 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1727 JH/09 Add $headers_added variable, with content from use of ACL modifier
1728 add_header (but not yet added to the message). Bugzilla 199.
1730 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1731 Pulled from Bugzilla 817 by Wolfgang Breyha.
1733 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1735 (nb: this is the same fix as in Exim 4.80.1)
1737 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1740 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1743 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1745 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1746 advertise SMTP AUTH mechanism to us, instead of a generic
1747 protocol violation error. Also, make Exim more robust to bad
1748 data from the Dovecot auth socket.
1750 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1752 When a queue runner is handling a message, Exim first routes the
1753 recipient addresses, during which it prunes them based on the retry
1754 hints database. After that it attempts to deliver the message to
1755 any remaining recipients. It then updates the hints database using
1758 So if a recipient address works intermittently, it can get repeatedly
1759 deferred at routing time. The retry hints record remains fresh so the
1760 address never reaches the final cutoff time.
1762 This is a fairly common occurrence when a user is bumping up against
1763 their storage quota. Exim had some logic in its local delivery code
1764 to deal with this. However it did not apply to per-recipient defers
1765 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1767 This change adds a proper retry rule check during routing so that the
1768 final cutoff time is checked against the message's age. We only do
1769 this check if there is an address retry record and there is not a
1770 domain retry record; this implies that previous attempts to handle
1771 the address had the retry_use_local_parts option turned on. We use
1772 this as an approximation for the destination being like a local
1773 delivery, as in LMTP.
1775 I suspect this new check makes the old local delivery cutoff check
1776 redundant, but I have not verified this so I left the code in place.
1778 TF/02 Correct gecos expansion when From: is a prefix of the username.
1780 Test 0254 submits a message to Exim with the header
1784 When I ran the test suite under the user fanf2, Exim expanded
1785 the header to contain my full name, whereas it should have added
1786 a Resent-Sender: header. It erroneously treats any prefix of the
1787 username as equal to the username.
1789 This change corrects that bug.
1791 GF/01 DCC debug and logging tidyup
1792 Error conditions log to paniclog rather than rejectlog.
1793 Debug lines prefixed by "DCC: " to remove any ambiguity.
1795 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1797 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1798 Bug spotted by Jeremy Harris; was flawed since initial commit.
1799 Would have resulted in OCSP responses post-SNI triggering an Exim
1800 NULL dereference and crash.
1802 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1804 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1805 Bug detection, analysis and fix by Samuel Thibault.
1806 Bugzilla 1331, Debian bug #698092.
1808 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1810 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1811 Server implementation by Todd Lyons, client by JH.
1812 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1813 config variable "prdr_enable" controls whether the server
1814 advertises the facility. If the client requests PRDR a new
1815 acl_data_smtp_prdr ACL is called once for each recipient, after
1816 the body content is received and before the acl_smtp_data ACL.
1817 The client is controlled by both of: a hosts_try_prdr option
1818 on the smtp transport, and the server advertisement.
1819 Default client logging of deliveries and rejections involving
1820 PRDR are flagged with the string "PRDR".
1822 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1823 fclose(). Diagnosis by Todd Lyons.
1825 PP/17 Update configure.default to handle IPv6 localhost better.
1826 Patch by Alain Williams (plus minor tweaks).
1829 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1830 This is now consistent with GnuTLS, and is now documented: the
1831 previous undocumented portable approach to treating the option as
1832 unset was to force an expansion failure. That still works, and
1833 an empty string is now equivalent.
1835 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1836 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1837 not performing validation itself.
1839 PP/20 Added force_command boolean option to pipe transport.
1840 Patch from Nick Koston, of cPanel Inc.
1842 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1845 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1847 PP/21 Fix eximon continuous updating with timestamped log-files.
1848 Broken in a format-string cleanup in 4.80, missed when I repaired the
1849 other false fix of the same issue.
1850 Report and fix from Heiko Schlichting.
1853 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1854 Report from Prashanth Katuri.
1856 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1857 It's SecureTransport, so affects any MacOS clients which use the
1858 system-integrated TLS libraries, including email clients.
1860 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1861 using a MIME ACL for non-SMTP local injection.
1862 Report and assistance in diagnosis by Warren Baker.
1864 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1866 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1868 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1869 last id that failed so it may be referenced in subsequent ACL's.
1871 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1874 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1875 ldap library initialization, allowing self-signed CA's to be
1876 used. Also properly sets require_cert option later in code by
1877 using NULL (global ldap config) instead of ldap handle (per
1878 session). Bug diagnosis and testing by alxgomz.
1880 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1881 the src/util/ subdirectory.
1883 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1884 renamed to Transport Post Delivery Action by Jeremy Harris, as
1887 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1888 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1889 redis_servers = needs to be configured which will be used by the redis
1890 lookup. Patch from Warren Baker, of The Packet Hub.
1892 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1894 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1895 hostname or reverse DNS when processing a host list. Used suggestions
1896 from multiple comments on this bug.
1898 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1900 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1901 Missed a few lines, added it to make the runtest require no keyboard
1904 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1905 contains upper case chars. Make router use caseful_local_part.
1907 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1908 support when GnuTLS has been built with p11-kit.
1914 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1916 This, or similar/improved, will also be change PP/11 of 4.82.
1922 PP/01 Handle short writes when writing local log-files.
1923 In practice, only affects FreeBSD (8 onwards).
1924 Bugzilla 1053, with thanks to Dmitry Isaikin.
1926 NM/01 Bugzilla 949 - Documentation tweak
1928 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1931 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1933 PP/02 Implemented gsasl authenticator.
1935 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1937 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1938 `pkg-config foo` for cflags/libs.
1940 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1941 with rest of GSASL and with heimdal_gssapi.
1943 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1944 `pkg-config foo` for cflags/libs for the TLS implementation.
1946 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1947 properties get this fed in as external SSF. A number of robustness
1948 and debugging improvements to the cyrus_sasl authenticator.
1950 PP/08 cyrus_sasl server now expands the server_realm option.
1952 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1953 Patch by Jeremy Harris.
1955 PP/10 Added dbmjz lookup type.
1957 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1959 PP/12 MAIL args handles TAB as well as SP, for better interop with
1960 non-compliant senders.
1961 Analysis and variant patch by Todd Lyons.
1963 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1964 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1965 Patch from Dirk Mueller <dmueller@suse.com>
1967 PP/13 tls_peerdn now print-escaped for spool files.
1968 Observed some $tls_peerdn in wild which contained \n, which resulted
1969 in spool file corruption.
1971 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1972 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1973 or write after TLS renegotiation, which otherwise led to messages
1976 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1977 as a tracking header (ie: a signed header comes before the signature).
1978 Patch from Wolfgang Breyha.
1980 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1981 comma-sep list; embedded commas doubled.
1983 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1985 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1987 Report and patch from Dmitry Banschikov.
1989 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1990 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1991 failures. We appear to now support TLS1.1+ with Exim.
1993 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1994 lets Exim select keys and certificates based upon TLS SNI from client.
1995 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1996 before an outbound SMTP session. New log_selector, +tls_sni.
1998 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1999 NULL dereference. Report and patch from Alun Jones.
2001 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2002 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2003 Not seeing resolver debug output on NetBSD, but suspect this is a
2004 resolver implementation change.
2006 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2007 Left warnings. Added "eximon gdb" invocation mode.
2009 PP/21 Defaulting "accept_8bitmime" to true, not false.
2011 PP/22 Added -bw for inetd wait mode support.
2013 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2014 locate the relevant includes and libraries. Made this the default.
2016 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2017 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2019 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2020 This may cause build issues on older platforms.
2022 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2023 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2024 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2025 Added SNI support via GnuTLS too.
2026 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2028 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2030 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2031 Applied second patch from Janne, implementing suggestion to default
2032 multiple-strings-in-record handling to match SPF spec.
2034 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2036 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2037 read-only, out of scope).
2038 Patch from Wolfgang Breyha, report from Stuart Northfield.
2040 PP/29 Fix three issues highlighted by clang analyser static analysis.
2041 Only crash-plausible issue would require the Cambridge-specific
2042 iplookup router and a misconfiguration.
2043 Report from Marcin Mirosław.
2045 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2047 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2048 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2049 As part of this, removing so much warning spew let me fix some minor
2050 real issues in debug logging.
2052 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2053 assignment on my part. Fixed.
2055 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2056 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2057 Janne Snabb (who went above and beyond: thank you).
2059 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2060 string otherwise requires a connection and a bunch more work and it's
2061 relatively easy to get wrong. Should also expose TLS library linkage
2064 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2065 64-bit ${eval} (JH/03).
2067 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2068 GNU libc to support some of the 64-bit stuff, should not lead to
2069 conflicts. Defined before os.h is pulled in, so if a given platform
2070 needs to override this, it can.
2072 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2073 protection layer was required, which is not implemented.
2074 Bugzilla 1254, patch from Wolfgang Breyha.
2076 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2077 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2078 tls_dhparam take prime identifiers. Also unbreak combination of
2079 OpenSSL+DH_params+TLSSNI.
2081 PP/39 Disable SSLv2 by default in OpenSSL support.
2087 PP/01 Solaris build fix for Oracle's LDAP libraries.
2088 Bugzilla 1109, patch from Stephen Usher.
2090 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2092 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2095 TF/02 Fix a couple more cases where we did not log the error message
2096 when unlink() failed. See also change 4.74-TF/03.
2098 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2099 lock up or crash if it happened to be inside a call to libc when it
2100 got a SIGUSR1 from exiwhat.
2102 The SIGUSR1 handler appends the current process status to the process
2103 log which is later printed by exiwhat. It used to use the general
2104 purpose logging code to do this, but several functions it calls are
2105 not safe for signals.
2107 The new output code in the SIGUSR1 handler is specific to the process
2108 log, and simple enough that it's easy to inspect for signal safety.
2109 Removing some special cases also simplifies the general logging code.
2110 Removing the spurious timestamps from the process log simplifies
2113 TF/04 Improved ratelimit ACL condition.
2115 The /noupdate option has been deprecated in favour of /readonly which
2116 has clearer semantics. The /leaky, /strict, and /readonly update modes
2117 are mutually exclusive. The update mode is no longer included in the
2118 database key; it just determines when the database is updated. (This
2119 means that when you upgrade Exim will forget old rate measurements.)
2121 Exim now checks that the per_* options are used with an update mode that
2122 makes sense for the current ACL. For example, when Exim is processing a
2123 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2124 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2125 must specify per_mail/readonly. If you omit the update mode it defaults to
2126 /leaky where that makes sense (as before) or /readonly where required.
2128 The /noupdate option is now undocumented but still supported for
2129 backwards compatibility. It is equivalent to /readonly except that in
2130 ACLs where /readonly is required you may specify /leaky/noupdate or
2131 /strict/noupdate which are treated the same as /readonly.
2133 A useful new feature is the /count= option. This is a generalization
2134 of the per_byte option, so that you can measure the throughput of other
2135 aggregate values. For example, the per_byte option is now equivalent
2136 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2138 The per_rcpt option has been generalized using the /count= mechanism
2139 (though it's more complicated than the per_byte equivalence). When it is
2140 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2141 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2142 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2143 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2144 Note that using per_rcpt with a non-readonly update mode in more than
2145 one ACL will cause the recipients to be double-counted. (The per_mail
2146 and per_byte options don't have this problem.)
2148 The handling of very low rates has changed slightly. If the computed rate
2149 is less than the event's count (usually one) then this event is the first
2150 after a long gap. In this case the rate is set to the same as this event's
2151 count, so that the first message of a spam run is counted properly.
2153 The major new feature is a mechanism for counting the rate of unique
2154 events. The new per_addr option counts the number of different
2155 recipients that someone has sent messages to in the last time period. It
2156 behaves like per_rcpt if all the recipient addresses are different, but
2157 duplicate recipient addresses do not increase the measured rate. Like
2158 the /count= option this is a general mechanism, so the per_addr option
2159 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2160 example, measure the rate that a client uses different sender addresses
2161 with the options per_mail/unique=$sender_address. There are further
2162 details in the main documentation.
2164 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2166 TF/06 Removed a few PCRE remnants.
2168 TF/07 Automatically extract Exim's version number from tags in the git
2169 repository when doing development or release builds.
2171 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2172 Bugzilla 879. Patch from Paul Fisher.
2174 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2175 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2178 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2180 PP/05 Variable $av_failed, true if the AV scanner deferred.
2181 Bugzilla 1078. Patch from John Horne.
2183 PP/06 Stop make process more reliably on build failure.
2184 Bugzilla 1087. Patch from Heiko Schlittermann.
2186 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2187 Bugzilla 1089. Patch from Heiko Schlittermann.
2189 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2190 Bugzilla 1131. Patch from Holger Weiß.
2192 PP/09 Handle IPv6 addresses with SPF.
2193 Bugzilla 860. Patch from Wolfgang Breyha.
2195 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2197 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2200 PP/11 match_* no longer expand right-hand-side by default.
2201 New compile-time build option, EXPAND_LISTMATCH_RHS.
2202 New expansion conditions, "inlist", "inlisti".
2204 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2206 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2208 PP/14 fix log_write() format string regression from TF/03.
2209 Bugzilla 1152. Patch from Dmitry Isaikin.
2215 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2217 PP/02 Harmonised TLS library version reporting; only show if debugging.
2218 Layout now matches that introduced for other libraries in 4.74 PP/03.
2220 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2222 PP/04 New "dns_use_edns0" global option.
2224 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2227 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2228 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2230 TK/01 Updated PolarSSL code to 0.14.2.
2231 Bugzilla 1097. Patch from Andreas Metzler.
2233 PP/07 Catch divide-by-zero in ${eval:...}.
2234 Fixes bugzilla 1102.
2236 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2239 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2240 format-string attack -- SECURITY: remote arbitrary code execution.
2242 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2243 time unintentionally subject to list matching rules, letting the header
2244 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2245 arbitrary string expansion). This allowed for information disclosure.
2247 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2248 INT_MIN/-1 -- value coerced to INT_MAX.
2254 NM/01 Workaround for PCRE version dependency in version reporting
2257 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2258 This fixes portability to compilers other than gcc, notably
2259 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2261 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2262 makefiles for portability to HP-UX and POSIX correctness.
2264 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2265 Also via indented variable definition in the Makefile.
2266 (Debugging by Oliver Heesakkers).
2268 PP/02 Restore caching of spamd results with expanded spamd_address.
2269 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2271 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2272 Improves build reliability. Fix from: Frank Elsner
2274 NM/02 Fix wide character breakage in the rfc2047 coding
2275 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2277 NM/03 Allow underscore in dnslist lookups
2278 Fixes bug 1026. Patch from Graeme Fowler
2280 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2281 Code patches from Adam Ciarcinski of NetBSD.
2283 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2286 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2287 is logged, to avoid truncation. Patch from John Horne.
2289 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2290 Patch from Jakob Hirsch.
2292 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2293 SQL string expansion failure details.
2294 Patch from Andrey Oktyabrski.
2296 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2297 Patch from Simon Arlott.
2299 PP/09 New lookups functionality failed to compile on old gcc which rejects
2300 extern declarations in function scope.
2301 Patch from Oliver Fleischmann
2303 PP/10 Use sig_atomic_t for flags set from signal handlers.
2304 Check getgroups() return and improve debugging.
2305 Fixed developed for diagnosis in bug 927 (which turned out to be
2308 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2309 Patch from Mark Zealey.
2311 PP/12 Bugzilla 1056: Improved spamd server selection.
2312 Patch from Mark Zealey.
2314 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2315 Based on patch from Heiko Schlittermann.
2317 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2318 Patch from Uwe Doering, sign-off by Michael Haardt.
2320 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2321 variable declaration deep within a block. Bug and patch from
2324 PP/15 lookups-Makefile IRIX compatibility coercion.
2326 PP/16 Make DISABLE_DKIM build knob functional.
2328 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2329 Patch by Simon Arlott
2331 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2332 variable argument macros. Our copy now differs from upstream.
2338 TF/01 Failure to get a lock on a hints database can have serious
2339 consequences so log it to the panic log.
2341 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2342 controlled using the smtp_confirmation log selector.
2344 TF/03 Include the error message when we fail to unlink a spool file.
2346 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2347 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2348 for maintaining out-of-tree patches for some time.
2350 PP/01 Bugzilla 139: Documentation and portability issues.
2351 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2352 Handle per-OS dynamic-module compilation flags.
2354 PP/02 Let /dev/null have normal permissions.
2355 The 4.73 fixes were a little too stringent and complained about the
2356 permissions on /dev/null. Exempt it from some checks.
2357 Reported by Andreas M. Kirchwitz.
2359 PP/03 Report version information for many libraries, including
2360 Exim version information for dynamically loaded libraries. Created
2361 version.h, now support a version extension string for distributors
2362 who patch heavily. Dynamic module ABI change.
2364 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2365 privilege escalation vulnerability whereby the Exim run-time user
2366 can cause root to append content of the attacker's choosing to
2369 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2372 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2373 If dropping privileges for untrusted macros, we disabled normal logging
2374 on the basis that it would fail; for the Exim run-time user, this is not
2375 the case, and it resulted in successful deliveries going unlogged.
2376 Fixed. Reported by Andreas Metzler.
2382 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2383 only prepend for the Resent-* case. Fixes regression introduced in
2384 Exim 4.70 by NM/22 for Bugzilla 607.
2386 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2387 increasing numbers of administrators be bitten by this.
2389 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2391 PP/03 Bugzilla 994: added openssl_options main configuration option.
2393 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2395 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2397 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2399 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2400 without a peer certificate, leading to a segfault because of an
2401 assumption that peers always have certificates. Be a little more
2402 paranoid. Problem reported by Martin Tscholak.
2404 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2405 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2406 NB: ClamAV planning to remove STREAM in "middle of 2010".
2407 CL also introduces -bmalware, various -d+acl logging additions and
2408 more caution in buffer sizes.
2410 PP/09 Implemented reverse_ip expansion operator.
2412 PP/10 Bugzilla 937: provide a "debug" ACL control.
2414 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2416 PP/12 Bugzilla 973: Implement --version.
2418 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2420 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2422 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2424 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2425 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2426 ignore trailing whitespace.
2428 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2430 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2433 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2434 Notification from Dr Andrew Aitchison.
2436 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2437 ExtendedDetectionInfo response format.
2438 Notification from John Horne.
2440 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2443 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2444 XSL and documented dependency on system catalogs, with examples of how
2447 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2450 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2451 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2452 configuration file which is writeable by the Exim user or group.
2454 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2455 of configuration files to cover files specified with the -C option if
2456 they are going to be used with root privileges, not just the default
2459 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2460 option (effectively making it always true).
2462 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2463 files to be used while preserving root privileges.
2465 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2466 that rogue child processes cannot use them.
2468 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2469 run-time user, instead of root.
2471 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2472 Exim run-time user without dropping privileges.
2474 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2475 result string, instead of calling string_vformat() twice with the same
2478 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2479 for other users. Others should always drop root privileges if they use
2480 -C on the command line, even for a whitelisted configure file.
2482 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2484 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2490 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2491 $data_path, and $header_path variables; fixed documentation bugs and
2494 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2495 exipick to access non-standard spools, including the "frozen" queue
2498 NM/01 Bugzilla 965: Support mysql stored procedures.
2499 Patch from Alain Williams
2501 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2503 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2504 Patch from Andreas Metzler
2506 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2507 Patch from Kirill Miazine
2509 NM/05 Bugzilla 671: Added umask to procmail example.
2511 JJ/03 installed exipick 20100323.0, fixing doc bug
2513 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2514 directory. Notification and patch from Dan Rosenberg.
2516 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2518 TK/02 Improve log output when DKIM signing operation fails.
2520 MH/01 Treat the transport option dkim_domain as a colon separated
2521 list, not as a single string, and sign the message with each element,
2522 omitting multiple occurences of the same signer.
2524 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2525 Bugzilla 985, 986. Patch by Simon Arlott
2527 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2528 Patch by Simon Arlott
2530 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2531 MBX locking. Notification from Dan Rosenberg.
2537 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2539 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2541 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2543 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2545 NM/04 Bugzilla 915: Flag broken perl installation during build.
2551 TK/01 Added patch by Johannes Berg that expands the main option
2552 "spamd_address" if it starts with a dollar sign.
2554 TK/02 Write list of recipients to X-Envelope-Sender header when building
2555 the mbox-format spool file for content scanning (suggested by Jakob
2558 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2559 (http://www.dcc-servers.net/) support via dccifd. Activated by
2560 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2562 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2563 by Mark Daniel Reidel <mr@df.eu>.
2565 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2566 When building exim an external PCRE library is now needed -
2567 PCRE is a system library on the majority of modern systems.
2568 See entry on PCRE_LIBS in EDITME file.
2570 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2571 conversation. Added nologin parameter to request.
2572 Patch contributed by Kirill Miazine.
2574 TF/01 Do not log submission mode rewrites if they do not change the address.
2576 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2578 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2579 log files in place. Contributed by Roberto Lima.
2581 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2583 TF/03 Bugzilla 615: When checking the local_parts router precondition
2584 after a local_part_suffix or local_part_prefix option, Exim now
2585 does not use the address's named list lookup cache, since this
2586 contains cached lookups for the whole local part.
2588 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2589 Robert Millan. Documentation is in experimental-spec.txt.
2591 TF/04 Bugzilla 668: Fix parallel build (make -j).
2593 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2595 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2596 Patch provided by Jan Srzednicki.
2598 TF/05 Leading white space used to be stripped from $spam_report which
2599 wrecked the formatting. Now it is preserved.
2601 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2602 that they are available at delivery time.
2604 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2606 TF/08 TLS error reporting now respects the incoming_interface and
2607 incoming_port log selectors.
2609 TF/09 Produce a more useful error message if an SMTP transport's hosts
2610 setting expands to an empty string.
2612 NM/06 Bugzilla 744: EXPN did not work under TLS.
2613 Patch provided by Phil Pennock.
2615 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2616 Patch provided by Richard Godbee.
2618 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2619 acl_smtp_notquit, added index entry.
2621 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2622 Patch provided by Eugene Bujak.
2624 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2625 accept(). Patch provided by Maxim Dounin.
2627 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2628 Patch provided by Phil Pennock.
2630 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2632 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2633 Patch provided by Brad "anomie" Jorsch.
2635 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2636 Patch provided by Dean Brooks.
2638 TK/05 Add native DKIM support (does not depend on external libraries).
2640 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2641 Patch provided by Graeme Fowler.
2643 NM/16 Bugzilla 851: Documentation example syntax fix.
2645 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2647 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2650 NM/19 Bugzilla 745: TLS version reporting.
2651 Patch provided by Phil Pennock.
2653 NM/20 Bugzilla 167: bool: condition support.
2654 Patch provided by Phil Pennock.
2656 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2657 clients. Patch provided by Phil Pennock.
2659 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2660 Patch provided by Brad "anomie" Jorsch.
2662 NM/23 Bugzilla 687: Fix misparses in eximstats.
2663 Patch provided by Heiko Schlittermann.
2665 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2666 Patch provided by Heiko Schlittermann.
2668 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2669 plus update to original patch.
2671 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2673 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2674 Patch provided by David Brownlee.
2676 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2678 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2680 NM/30 Bugzilla 888: TLS documentation bugfixes.
2682 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2684 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2685 Unlike the original bugzilla I have changed all shell scripts in src tree.
2687 NM/33 Bugzilla 898: Transport filter timeout fix.
2688 Patch by Todd Rinaldo.
2690 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2691 Patch by Serge Demonchaux.
2693 NM/35 Bugzilla 39: Base64 decode bug fixes.
2694 Patch by Jakob Hirsch.
2696 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2698 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2700 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2702 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2708 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2709 ALT-N's libdkim that I have put here:
2710 http://duncanthrax.net/exim-experimental/
2712 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2713 were called 'true' and it seems that C99 defines that as a reserved
2714 keyword to be used with 'bool' variable types. That means you could
2715 not include C99-style headers which use bools without triggering
2716 build errors in sieve.c.
2718 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2719 as mailq or other aliases. Changed the --help handling significantly
2720 to do whats expected. exim_usage() emits usage/help information.
2722 SC/01 Added the -bylocaldomain option to eximstats.
2724 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2726 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2728 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2734 PH/01 Another patch from the Sieve maintainer.
2736 PH/02 When an IPv6 address is converted to a string for single-key lookup
2737 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2738 dots are used instead of colons so that keys in lsearch files need not
2739 contain colons. This was done some time before quoting was made available
2740 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2741 (notated using the quote facility) so as to distinguish them from IPv4
2742 keys. This meant that lookups for IP addresses in host lists did not work
2743 for iplsearch lookups.
2745 This has been fixed by arranging for IPv6 addresses to be expressed with
2746 colons if the lookup type is iplsearch. This is not incompatible, because
2747 previously such lookups could never work.
2749 The situation is now rather anomalous, since one *can* have colons in
2750 ordinary lsearch keys. However, making the change in all cases is
2751 incompatible and would probably break a number of configurations.
2753 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2756 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2757 conversion specification without a maximum field width, thereby enabling
2758 a rogue spamd server to cause a buffer overflow. While nobody in their
2759 right mind would setup Exim to query an untrusted spamd server, an
2760 attacker that gains access to a server running spamd could potentially
2761 exploit this vulnerability to run arbitrary code as the Exim user.
2763 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2764 $primary_hostname instead of what libspf2 thinks the hosts name is.
2766 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2767 a directory entry by the name of the lookup key. Previously, if a
2768 symlink pointed to a non-existing file or a file in a directory that
2769 Exim lacked permissions to read, a lookup for a key matching that
2770 symlink would fail. Now it is enough that a matching directory entry
2771 exists, symlink or not. (Bugzilla 503.)
2773 PH/03 The body_linecount and body_zerocount variables are now exported in the
2776 PH/04 Added the $dnslist_matched variable.
2778 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2779 This means they are set thereafter only if the connection becomes
2782 PH/06 Added the client_condition to authenticators so that some can be skipped
2783 by clients under certain conditions.
2785 PH/07 The error message for a badly-placed control=no_multiline_responses left
2786 "_responses" off the end of the name.
2788 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2790 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2791 (without spaces) instead of just copying the configuration text.
2793 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2795 PH/11 Added $max_received_linelength.
2797 PH/12 Added +ignore_defer and +include_defer to host lists.
2799 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2800 way in which PCRE > 7.0 is built.
2802 PH/14 Implemented queue_only_load_latch.
2804 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2805 MAIL command. The effect was to mangle the value on 64-bit systems.
2807 PH/16 Another patch from the Sieve maintainer.
2809 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2811 PH/18 If a system quota error occurred while trying to create the file for
2812 a maildir delivery, the message "Mailbox is full" was not appended to the
2813 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2814 only to a quota excession during the actual writing of the file.
2816 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2817 characters?) which causes problems in log lines. The DN values are now
2818 passed through string_printing() before being added to log lines.
2820 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2821 and InterBase are left for another time.)
2823 PH/21 Added message_body_newlines option.
2825 PH/22 Guard against possible overflow in moan_check_errorcopy().
2827 PH/23 POSIX allows open() to be a macro; guard against that.
2829 PH/24 If the recipient of an error message contained an @ in the local part
2830 (suitably quoted, of course), incorrect values were put in $domain and
2831 $local_part during the evaluation of errors_copy.
2837 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2838 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2841 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2842 issue a MAIL command.
2844 PH/02 In an ACL statement such as
2846 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2848 if a client was not listed at all, or was listed with a value other than
2849 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2850 the condition was not true (as it should be), so access was not denied.
2851 The bug was that the ! inversion was incorrectly passed on to the second
2852 item. This has been fixed.
2854 PH/03 Added additional dnslists conditions == and =& which are different from
2855 = and & when the dns lookup returns more than one IP address.
2857 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2858 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2860 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2861 FSYNC, which compiles an option called disable_fsync that allows for
2862 bypassing fsync(). The documentation is heavily laced with warnings.
2864 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2866 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2867 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2868 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2869 including adding "make clean"; (3) Added -fPIC when compiling the test
2870 dynamically loaded module, to get rid of a warning.
2872 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2873 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2874 = 0s. The bug is otherwise harmless.
2876 PH/07 There was a bug in the dovecot authenticator such that the value of
2877 $auth1 could be overwritten, and so not correctly preserved, after a
2878 successful authentication. This usually meant that the value preserved by
2879 the server_setid option was incorrect.
2881 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2883 PH/09 Installed PCRE release 7.0.
2885 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2886 run for batched SMTP input. It is now run at the start of every message
2887 in the batch. While fixing this I discovered that the process information
2888 (output by running exiwhat) was not always getting set for -bs and -bS
2889 input. This is fixed, and it now also says "batched" for BSMTP.
2891 PH/11 Added control=no_pipelining.
2893 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2894 patch, slightly modified), and move the expansion of helo_data till after
2895 the connection is made in the smtp transport (so it can use these
2898 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2900 PH/14 Added log_selector = +pid.
2902 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2904 PH/16 Add ${if forany and ${if forall.
2906 PH/17 Added dsn_from option to vary the From: line in DSNs.
2908 PH/18 Flush SMTP output before performing a callout, unless control =
2909 no_callout_flush is set.
2911 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2912 was true (the default) a successful delivery failed to delete the retry
2913 item, thus causing premature timeout of the address. The bug is now
2916 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2918 PH/21 Long custom messages for fakedefer and fakereject are now split up
2919 into multiline responses in the same way that messages for "deny" and
2920 other ACL rejections are.
2922 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2923 with slight modification.
2925 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2926 draft, changing the syntax and factoring some duplicate code".
2928 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2929 for deliveries of the second and subsequent messages over the same SMTP
2932 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2933 ${reduce, with only minor "tidies".
2935 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2937 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2938 expansion side effects.
2940 PH/27 When a message times out after an over-quota error from an Exim-imposed
2941 quota, the bounce message says "mailbox is full". This message was not
2942 being given when it was a system quota that was exceeded. It now should
2945 MH/03 Made $recipients available in local_scan(). local_scan() already has
2946 better access to the recipient list through recipients_list[], but
2947 $recipients can be useful in postmaster-provided expansion strings.
2949 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2950 in the case of a MAIL command with additional options following the
2951 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2952 were accidentally chopped off.
2954 PH/29 SMTP synchronization checks are implemented when a command is read -
2955 there is a check that no more input is waiting when there shouldn't be
2956 any. However, for some commands, a delay in an ACL can mean that it is
2957 some time before the response is written. In this time, more input might
2958 arrive, invalidly. So now there are extra checks after an ACL has run for
2959 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2960 pipelining has not been advertised.
2962 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2964 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2965 returned in the SMTP response when smtp_return_error_details was false.
2966 This has been fixed.
2968 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2969 instead of the C I/O that was originally supplied, because problems were
2970 reported on Solaris.
2972 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2973 Exim which did not show up earlier: it was assuming that a call to
2974 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2975 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2976 was a macro that became an assignment, so it seemed to work. This has
2977 changed to a proper function call with a void return, hence the compile
2978 error. Exim's code has been fixed.
2980 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2983 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2985 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2987 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2988 because it turns out to be too big or there is a timeout) there is no
2989 "Completed" line in the log. When some messages of this type were
2990 selected by exigrep, they were listed as "not completed". Others were
2991 picked up by some special patterns. I have improved the selection
2992 criteria to be more general.
2994 PH/38 The host_find_failed option in the manualroute router can now be set
2995 to "ignore", to completely ignore a host whose IP address cannot be
2996 found. If all hosts are ignored, the behaviour is controlled by the new
2997 host_all_ignored option.
2999 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3000 homing or because of multiple MX records with /mx) generated more than
3001 one IP address, and the following item turned out to be the local host,
3002 all the secondary addresses of the first item were incorrectly removed
3003 from the list, along with the local host and any following hosts (which
3004 is what is supposed to happen).
3006 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3007 whoever called Exim into the -H file. In the case of the daemon it was
3008 behaving confusingly. When first started, it used values for whoever
3009 started the daemon, but after a SIGHUP it used the Exim user (because it
3010 calls itself on a restart). I have changed the code so that it now always
3013 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3014 message are rejected with the same error (e.g. no authentication or bad
3015 sender address), and a DATA command is nevertheless sent (as can happen
3016 with PIPELINING or a stupid MUA), the error message that was given to the
3017 RCPT commands is included in the rejection of the DATA command. This is
3018 intended to be helpful for MUAs that show only the final error to their
3021 PH/42 Another patch from the Sieve maintainer.
3023 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3024 Eximstats - Fixed some broken HTML links and added missing column headers
3026 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3027 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3029 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3031 PH/43 Yet another patch from the Sieve maintainer.
3033 PH/44 I found a way to check for a TCP/IP connection going away before sending
3034 the response to the final '.' that terminates a message, but only in the
3035 case where the client has not sent further data following the '.'
3036 (unfortunately, this is allowed). However, in many cases there won't be
3037 any further data because there won't be any more messages to send. A call
3038 to select() can be used: if it shows that the input is "ready", there is
3039 either input waiting, or the socket has been closed. An attempt to read
3040 the next input character can distinguish the two cases. Previously, Exim
3041 would have sent an OK response which the client would never have see.
3042 This could lead to message repetition. This fix should cure that, at
3043 least in a lot of common cases.
3045 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3046 advertised in response to EHLO.
3052 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3053 fixed by 4.65/MH/01 (is this a record?) are fixed:
3055 (i) An empty string was always treated as zero by the numeric comparison
3056 operators. This behaviour has been restored.
3058 (ii) It is documented that the numeric comparison operators always treat
3059 their arguments as decimal numbers. This was broken in that numbers
3060 starting with 0 were being interpreted as octal.
3062 While fixing these problems I realized that there was another issue that
3063 hadn't been noticed. Values of message_size_limit (both the global option
3064 and the transport option) were treated as octal if they started with 0.
3065 The documentation was vague. These values are now always treated as
3066 decimal, and I will make that clear in the documentation.
3072 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3073 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3076 MH/01 Don't check that the operands of numeric comparison operators are
3077 integers when their expansion is in "skipping" mode (fixes bug
3078 introduced by 4.64-PH/07).
3080 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3081 child addresses, Exim now panics and dies. Previously, because the count
3082 is held in a short int, deliveries were likely to be lost. As such a
3083 large number of recipients for a single message is ridiculous
3084 (performance will be very, very poor), I have chosen to impose a limit
3085 rather than extend the field.
3091 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3092 leftover -K file (the existence of which was triggered by #402).
3093 While we were at it, introduced process PID as part of the -K
3094 filename. This should rule out race conditions when creating
3097 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3098 processing considerably. Previous code took too long for large mails,
3099 triggering a timeout which in turn triggers #401.
3101 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3102 in the DK code in transports.c. sendfile() is not really portable,
3103 hence the _LINUX specificness.
3105 TF/01 In the add_headers option to the mail command in an Exim filter,
3106 there was a bug that Exim would claim a syntax error in any
3107 header after the first one which had an odd number of characters
3110 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3111 callout verification, Exim cached a "reject" for the entire domain. This
3112 is correct for most verifications, but it is not correct for a recipient
3113 verification with use_sender or use_postmaster set, because in that case
3114 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3115 case of MAIL FROM:<> rejection from other early rejections (e.g.
3116 rejection of HELO). When verifying a recipient using a non-null MAIL
3117 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3118 Whatever the result of the callout, the value of the domain cache is
3119 left unchanged (for any other kind of callout, getting as far as trying
3120 RCPT means that the domain itself is ok).
3122 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3125 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3126 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3127 session, the daemon ignores ECONNECT errors and logs others; it now
3128 ignores EPIPE as well.
3130 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3131 (quoted-printable decoding).
3133 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3134 later the small subsequent patch to fix an introduced bug.
3136 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3138 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3140 PH/08 An error is now given if message_size_limit is specified negative.
3142 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3143 to be given (somewhat) arbitrary names.
3145 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3148 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3149 miscellaneous code fixes
3151 PH/10 Added the log_reject_target ACL modifier to specify where to log
3154 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3155 hostname. This is wrong, because it relates to the incoming message (and
3156 probably the interface on which it is arriving) and not to the outgoing
3157 callout (which could be using a different interface). This has been
3158 changed to use the value of the helo_data option from the smtp transport
3159 instead - this is what is used when a message is actually being sent. If
3160 there is no remote transport (possible with a router that sets up host
3161 addresses), $smtp_active_hostname is used.
3163 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3164 tweaks were necessary in order to get it to work (see also 21 below):
3165 (a) The code assumed that strncpy() returns a negative number on buffer
3166 overflow, which isn't the case. Replaced with Exim's string_format()
3168 (b) There were several signed/unsigned issues. I just did the minimum
3169 hacking in of casts. There is scope for a larger refactoring.
3170 (c) The code used strcasecmp() which is not a standard C function.
3171 Replaced with Exim's strcmpic() function.
3172 (d) The code set only $1; it now sets $auth1 as well.
3173 (e) A simple test gave the error "authentication client didn't specify
3174 service in request". It would seem that Dovecot has changed its
3175 interface. Fortunately there's a specification; I followed it and
3176 changed what the client sends and it appears to be working now.
3178 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3181 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3182 address A is aliased to B and C, where B exists and C does not. Without
3183 -v the output is "A verified" because verification stops after a
3184 successful redirection if more than one address is generated. However,
3185 with -v the child addresses are also verified. Exim was outputting "A
3186 failed to verify" and then showing the successful verification for C,
3187 with its parentage. It now outputs "B failed to verify", showing B's
3188 parentage before showing the successful verification of C.
3190 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3191 look up a TXT record in a specific list after matching in a combined
3194 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3195 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3196 they consult the DNS. I had assumed they would set it the way they
3197 wanted; and indeed my experiments on Linux seem to show that in some
3198 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3199 To be on the safe side, however, I have now made the interface to
3200 host_find_byname() similar to host_find_bydns(), with an argument
3201 containing the DNS resolver options. The host_find_byname() function now
3202 sets these options at its start, just as host_find_bydns() does. The smtp
3203 transport options dns_qualify_single and dns_search_parents are passed to
3204 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3205 of host_find_byname() use the default settings of RES_DEFNAMES
3206 (qualify_single) but not RES_DNSRCH (search_parents).
3208 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3209 spool_read_header() do less string testing, by means of a preliminary
3210 switch on the second character of optional "-foo" lines. (This is
3211 overdue, caused by the large number of possibilities that now exist.
3212 Originally there were few.) While I was there, I also converted the
3213 str(n)cmp tests so they don't re-test the leading "-" and the first
3214 character, in the hope this might squeeze out yet more improvement.
3216 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3217 flag allowing group syntax was set by the header_syntax check but not
3218 turned off, possible causing trouble later; (2) The flag was not being
3219 set at all for the header_verify test, causing "group"-style headers to
3220 be rejected. I have now set it in this case, and also caused header_
3221 verify to ignore an empty address taken from a group. While doing this, I
3222 came across some other cases where the code for allowing group syntax
3223 while scanning a header line wasn't quite right (mostly, not resetting
3224 the flag correctly in the right place). These bugs could have caused
3225 trouble for malformed header lines. I hope it is now all correct.
3227 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3228 with the "reply" argument non-NULL. The code, however (which originally
3229 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3230 but it didn't always do it. This confused somebody who was copying the
3231 code for some other use. I have removed all the tests.
3233 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3234 feature that was used to support insecure browsers during the U.S. crypto
3235 embargo. It requires special client support, and Exim is probably the
3236 only MTA that supported it -- and would never use it because real RSA is
3237 always available. This code has been removed, because it had the bad
3238 effect of slowing Exim down by computing (never used) parameters for the
3239 RSA_EXPORT functionality.
3241 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3242 authenticator to fail if there's a tab character in the incoming data
3243 (there should never be unless someone is messing about, as it's supposed
3244 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3245 if the connection is using TLS or if the remote IP is the same as the
3246 local IP, and the "valid-client-cert option" if a client certificate has
3249 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3250 authenticators. This can be used for authorization after authentication
3251 succeeds. (In the case of plaintext, it servers for both authentication
3254 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3255 if any retry times were supplied.
3257 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3258 connection, where there is no client IP address to check. In this
3259 situation, the verify now always succeeds.
3261 PH/25 Applied John Jetmore's -Mset patch.
3263 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3265 PH/27 In a string expansion for a processed (not raw) header when multiple
3266 headers of the same name were present, leading whitespace was being
3267 removed from all of them, but trailing whitespace was being removed only
3268 from the last one. Now trailing whitespace is removed from each header
3269 before concatenation. Completely empty headers in a concatenation (as
3270 before) are ignored.
3272 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3273 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3275 PH/29 [Removed. This was a change that I later backed out, and forgot to
3276 correct the ChangeLog entry (that I had efficiently created) before
3277 committing the later change.]
3279 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3280 address errors (4xx response to RCPT) over the same connection as other
3281 messages routed to the same hosts. Such deliveries are always "forced",
3282 so retry times are not inspected. This resulted in far too many retries
3283 for the affected addresses. The effect occurred only when there were more
3284 hosts than the hosts_max_try setting in the smtp transport when it had
3285 the 4xx errors. Those hosts that it had tried were not added to the list
3286 of hosts for which the message was waiting, so if all were tried, there
3287 was no problem. Two fixes have been applied:
3289 (i) If there are any address or message errors in an SMTP delivery, none
3290 of the hosts (tried or untried) are now added to the list of hosts
3291 for which the message is waiting, so the message should not be a
3292 candidate for sending over the same connection that was used for a
3293 successful delivery of some other message. This seems entirely
3294 reasonable: after all the message is NOT "waiting for some host".
3295 This is so "obvious" that I'm not sure why it wasn't done
3296 previously. Hope I haven't missed anything, but it can't do any
3297 harm, as the worst effect is to miss an optimization.
3299 (ii) If, despite (i), such a delivery is accidentally attempted, the
3300 routing retry time is respected, so at least it doesn't keep
3301 hammering the server.
3303 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3304 in ${readsocket because some servers need this prod.
3306 PH/32 Added some extra debug output when updating a wait-xxx database.
3308 PH/33 The hint "could be header name not terminated by colon", which has been
3309 given for certain expansion errors for a long time, was not being given
3310 for the ${if def:h_colon_omitted{... case.
3312 PH/34 The spec says: "With one important exception, whenever a domain list is
3313 being scanned, $domain contains the subject domain." There was at least
3314 one case where this was not true.
3316 PH/35 The error "getsockname() failed: connection reset by peer" was being
3317 written to the panic log as well as the main log, but it isn't really
3318 panic-worthy as it just means the connection died rather early on. I have
3319 removed the panic log writing for the ECONNRESET error when getsockname()
3322 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3323 runs only) independently of the message's sender address. This meant
3324 that, if the 4xx error was in fact related to the sender, a different
3325 message to the same recipient with a different sender could confuse
3326 things. In particular, this can happen when sending to a greylisting
3327 server, but other circumstances could also provoke similar problems.
3328 I have changed the default so that the retry time for these errors is now
3329 based a combination of the sender and recipient addresses. This change
3330 can be overridden by setting address_retry_include_sender=false in the
3333 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3334 remote server are returned as part of bounce messages. This was not
3335 happening for LMTP over a pipe (the lmtp transport), but now it is the
3336 same for both kinds of LMTP.
3338 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3339 in header lines that were in fact CNAMEs. This is no longer the case.
3341 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3342 and queue runs started by the daemon processed all messages. This has
3343 been fixed so that -R and -S can now usefully be given with -q<time>.
3345 PH/40 Import PCRE release 6.7 (fixes some bugs).
3347 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3349 PH/42 Give an error if -q is specified more than once.
3351 PH/43 Renamed the variables $interface_address and $interface_port as
3352 $received_ip_address and $received_port, to make it clear that these
3353 values apply to message reception, and not to the outgoing interface when
3354 a message is delivered. (The old names remain recognized, of course.)
3356 PH/44 There was no timeout on the connect() call when using a Unix domain
3357 socket in the ${readsocket expansion. There now is.
3359 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3360 be meaningful with "accept".
3362 SC/01 Eximstats V1.43
3363 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3365 SC/02 Eximstats V1.44
3366 Use a glob alias rather than an array ref in the generated
3367 parser. This improves both readability and performance.
3369 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3370 Collect SpamAssassin and rejection statistics.
3371 Don't display local sender or destination tables unless
3372 there is data to show.
3373 Added average volumes into the top table text output.
3375 SC/04 Eximstats V1.46
3376 Collect data on the number of addresses (recipients)
3377 as well as the number of messages.
3379 SC/05 Eximstats V1.47
3380 Added 'Message too big' to the list of mail rejection
3381 reasons (thanks to Marco Gaiarin).
3383 SC/06 Eximstats V1.48
3384 Mainlog lines which have GMT offsets and are too short to
3385 have a flag are now skipped.
3387 SC/07 Eximstats V1.49 (Alain Williams)
3388 Added the -emptyok flag.
3390 SC/08 Eximstats V1.50
3391 Fixes for obtaining the IP address from reject messages.
3393 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3394 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3395 whitespace changes from 4.64-PH/27
3397 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3400 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3401 are found, allow negative numbers in numeric criteria)
3403 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3405 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3406 to match changes made in 4.64-PH/43
3408 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3410 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3411 "domain" is actually an IP address, and force a failure. This locks out
3412 those revolvers/nameservers that support "A-for-A" lookups, in
3413 contravention of the specifications.
3415 PH/48 When a host name was looked up from an IP address, and the subsequent
3416 forward lookup of the name timed out, the host name was left in
3417 $sender_host_name, contrary to the specification.
3419 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3420 restricted to single-key lookups, Exim was not diagnosing an error if
3421 * or *@ was used with a query-style lookup.
3423 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3425 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3426 long ago, but noone interested enough thought of it. Let's just say that
3427 the "1.1" means that there are some new functions that weren't there at
3428 some point in the past.
3430 PH/51 Error processing for expansion failure of helo_data from an smtp
3431 transport during callout processing was broken.
3433 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3434 tested/used via the -bh/-bhc/-bs options.
3436 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3437 bug, fixed in subsequent PCRE releases).
3439 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3440 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3442 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3448 SC/01 Use a glob alias rather than an array ref in eximstats generated
3449 parser. This improves both readability and performance.
3451 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3452 Don't display local sender or destination tables in eximstats unless
3453 there is data to show.
3454 Added average volumes into the eximstats top table text output.
3456 SC/03 Collect data on the number of addresses (recipients) as well
3457 as the number of messages in eximstats.
3459 TF/01 Correct an error in the documentation for the redirect router. Exim
3460 does (usually) call initgroups() when daemonizing.
3462 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3463 with consistent privilege compared to when running as a daemon.
3465 TF/03 Note in the spec that $authenticated_id is not set for local
3466 submissions from trusted users.
3468 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3469 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3471 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3472 by adding some example configuration directives to the default
3473 configuration file. A little bit of work is required to uncomment the
3474 directives and define how usernames and passwords are checked, but
3475 there is now a framework to start from.
3477 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3478 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3479 without this. I don't know how relevant this is to other LDAP libraries.
3481 PH/02 Add the verb name to the "unknown ACL verb" error.
3483 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3485 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3487 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3488 directory not expanded when it should be if an expanded home directory
3489 was set for the address (which is overridden by the transport).
3491 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3494 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3495 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3496 because it is too late at that time, and has no effect.
3498 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3499 security issue with \' (bugzilla #107). I could not use the
3500 PQescapeStringConn() function, because it needs a PGconn value as one of
3503 PH/08 When testing addresses using -bt, indicate those final addresses that
3504 are duplicates that would not cause an additional delivery. At least one
3505 person was confused, thinking that -bt output corresponded to deliveries.
3506 (Suppressing duplicates isn't a good idea as you lose the information
3507 about possibly different redirections that led to the duplicates.)
3509 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3510 systems where poll() doesn't work, in particular OS X.
3512 PH/10 Added more information to debugging output for retry time not reached.
3514 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3515 operations in malware.c.
3517 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3520 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3521 syslog_duplication set false, log lines that would normally be written
3522 both the the main log and to the reject log were not written to syslog at
3525 PH/14 In the default configuration, change the use of "message" in ACL warn
3526 statements to "add_header".
3528 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3529 not followed by a command (e.g. "seen endif").
3531 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3532 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3535 PH/17 Added extra conditions to the default value of delay_warning_condition
3539 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3540 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3541 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3544 The Auto-Submitted: and various List- headers are standardised, whereas I
3545 don't think Precedence: ever was.
3547 PH/18 Refactored debugging code in route_finduser() to show more information,
3548 in particular, the error code if getpwnam() issues one.
3550 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3551 This is apparently needed in addition to the PH/07 change above to avoid
3552 any possible encoding problems.
3554 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3555 but not after initializing Perl.
3557 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3558 output them only if debugging. By default they are written stderr,
3559 apparently, which is not desirable.
3561 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3564 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3567 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3569 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3570 authenticated or an ident call has been made. Suppress the default
3571 values for $authenticated_id and $authenticated_sender (but permit -oMai
3572 and -oMas) when testing with -bh.
3574 PH/24 Re-jigged the order of the tests in the default configuration so that the
3575 tests for valid domains and recipients precede the DNS black list and CSA
3576 tests, on the grounds that those ones are more expensive.
3578 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3579 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3580 This bug exists in every version of Exim that I still have, right back to
3583 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3584 However, an attempt to turn on case-sensitivity in a regex key by
3585 including (?-i) didn't work because the subject string was already
3586 lowercased, and the effects were non-intuitive. It turns out that a
3587 one-line patch can be used to allow (?-i) to work as expected.
3593 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3594 other effects) broke the use of negated acl sub-conditions.
3596 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3599 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3600 "Deny" causes Exim to reject the incoming connection with a 554 error.
3601 Unfortunately, if there is a major crisis, such as a disk failure,
3602 tcp-wrappers gives "deny", whereas what one would like would be some
3603 kind of temporary error. A kludge has been added to help with this.
3604 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3605 554 error is used if errno is still zero or contains ENOENT (which occurs
3606 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3609 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3611 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3612 errors. Otherwise a message that provokes a temporary error (when other
3613 messages do not) can cause a whole host to time out.
3615 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3616 addresses were routed directly to files or pipes from a redirect router.
3617 File deliveries just didn't batch; pipe deliveries might have suffered
3620 PH/06 A failure to get a lock for a hints database would erroneously always say
3621 "Failed to get write lock", even when it was really a read lock.
3623 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3624 of 0600. This has been changed to use the value of the lockfile_mode
3625 option (which defaults to 0600).
3627 PH/08 Applied small patch from the Sieve maintainer.
3629 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3630 folder from quota calculations, a direct delivery into this folder messed
3631 up the contents of the maildirsize file. This was because the regex was
3632 used only to exclude .Trash (or whatever) when the size of the mailbox
3633 was calculated. There was no check that a delivery was happening into an
3634 excluded directory. This bug has been fixed by ignoring all quota
3635 processing for deliveries into excluded directories.
3637 PH/10 Added the maildirfolder_create_regex option to appendfile.
3643 PH/01 The code for finding all the local interface addresses on a FreeBSD
3644 system running IPv6 was broken. This may well have applied to all BSD
3645 systems, as well as to others that have similar system calls. The broken
3646 code found IPv4 interfaces correctly, but gave incorrect values for the
3647 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3648 that it would not match correctly against @[] and not recognize the IPv6
3651 PH/02 The ipliteral router was not recognizing addresses of the form user@
3652 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3654 PH/03 Added disable_ipv6.
3656 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3657 decoded form, because it is most often used to construct To: headers
3658 lines in autoreplies, and the decoded form may well be syntactically
3659 invalid. However, $reply_address has leading white space removed, and all
3660 newlines turned into spaces so that the autoreply transport does not
3663 PH/05 If group was specified without a user on a router, and no group or user
3664 was specified on a transport, the group from the router was ignored.
3666 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3667 for visible compile-time settings that can be used to change these
3668 numbers, for those that want even more. Backwards compatibility with old
3669 spool files has been maintained. However, going back to a previous Exim
3670 release will lost any variables that are in spool files.
3672 PH/07 Two small changes when running in the test harness: increase delay when
3673 passing a TCP/IP connection to a new process, in case the original
3674 process has to generate a bounce, and remove special handling of
3675 127.0.0.2 (sic), which is no longer necessary.
3677 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3678 be the same on different OS.
3680 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3683 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3684 whether --show-vars was specified or not
3686 JJ/02 exipick: Added support for new ACL variable spool format introduced
3689 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3690 syntactically invalid From: or Reply-to: line, and a filter used this to
3691 generate an autoreply, and therefore failed to obtain an address for the
3692 autoreply, Exim could try to deliver to a non-existent relative file
3693 name, causing unrelated and misleading errors. What now happens is that
3694 it logs this as a hard delivery error, but does not attempt to create a
3697 PH/11 The exinext utility has a -C option for testing purposes, but although
3698 the given file was scanned by exinext itself; it wasn't being passed on
3699 when Exim was called.
3701 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3702 an end-of-file indication when reading a command response.
3704 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3705 compiled. In many other places in Exim, IPv6 addresses are always
3706 recognized, so I have changed this. It also means that IPv4 domain
3707 literals of the form [IPV4:n.n.n.n] are now always recognized.
3709 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3710 used if the router is not running as root, for example, when verifying at
3711 ACL time, or when using -bh. The debugging output from this situation was
3712 non-existent - all you got was a failure to exec. I have made two
3715 (a) Failures to set uid/gid, the current directory, or a process leader
3716 in a subprocess such as that created by queryprogram now generate
3717 suitable debugging output when -d is set.
3719 (b) The queryprogram router detects when it is not running as root,
3720 outputs suitable debugging information if -d is set, and then runs
3721 the subprocess without attempting to change uid/gid.
3723 PH/15 Minor change to Makefile for building test_host (undocumented testing
3726 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3727 additional section of a DNS packet that returns MX or SRV records.
3728 Instead, it always explicitly searches for A/AAAA records. This avoids
3729 major problems that occur when a DNS server includes only records of one
3730 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3731 fixed another bug: if SRV records were looked up and the corresponding
3732 address records were *not* found in the additional section, the port
3733 values from the SRV records were lost.
3735 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3736 using the correct key (the original address) when searching the retry
3737 rules in order to find which one to use for generating the retry hint.
3739 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3740 adding the default one. Similarly, if it contains a Reply-To: header, the
3741 errors_reply_to option, if set, is not used.
3743 PH/19 When calculating a retry time, Exim used to measure the "time since
3744 failure" by looking at the "first failed" field in the retry record. Now
3745 it does not use this if it is later than than the arrival time of the
3746 message. Instead it uses the arrival time. This makes for better
3747 behaviour in cases where some deliveries succeed, thus re-setting the
3748 "first failed" field. An example is a quota failure for a huge message
3749 when small messages continue to be delivered. Without this change, the
3750 "time since failure" will always be short, possible causing more frequent
3751 delivery attempts for the huge message than are intended.
3752 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3754 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3755 $1, $2, $3) because the numerical variables can be reset during some
3756 expansion items (e.g. "match"), thereby losing the authentication data.
3758 PH/21 Make -bV show the size of off_t variables so that the test suite can
3759 decide whether to run tests for quotas > 2G.
3761 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3762 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3763 filecount value is greater than 2G or if a quota value is greater than 2G
3764 on a system where the size of off_t is not greater than 4, a panic error
3767 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3768 never match. The debug and -bh output now contains an explicit error
3769 message indicating a malformed IPv4 address or mask.
3771 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3772 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3773 PH/23 above applies.
3775 PH/25 Do not write to syslog when running in the test harness. The only
3776 occasion when this arises is a failure to open the main or panic logs
3777 (for which there is an explicit test).
3779 PH/26 Added the /no_tell option to "control=freeze".
3781 PH/27 If a host name lookup failed very early in a connection, for example, if
3782 the IP address matched host_lookup and the reverse lookup yielded a name
3783 that did not have a forward lookup, an error message of the form "no IP
3784 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3785 could be logged. Now it outputs the IP address instead of "NULL".
3787 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3788 allows the sender and the authenticated sender to be set when
3789 submitting a message from within Exim. Since child_open_exim() is
3790 documented for local_scan(), the new function should be too.
3792 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3793 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3794 results in an empty string is now treated as unset.
3796 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3798 PH/31 Added sender_verify_fail logging option.
3800 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3801 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3802 tidied the source and removed it altogether.
3804 PH/33 When a queue run was abandoned because the load average was too high, a
3805 log line was always written; now it is written only if the queue_run log
3806 selector is set. In addition, the log line for abandonment now contains
3807 information about the queue run such as the pid. This is always present
3808 in "start" and "stop" lines but was omitted from the "abandon" line.
3810 PH/34 Omit spaces between a header name and the colon in the error message that
3811 is given when verify = headers_syntax fails (if there are lots of them,
3812 the message gets confusing).
3814 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3815 names, as there are now some PTR records that contain slashes. This check
3816 is only to protect against broken name servers that fall over on strange
3817 characters, so the fact that it applies to all lookups doesn't matter.
3819 PH/36 Now that the new test suite is complete, we can remove some of the
3820 special code in Exim that was needed for the old test suite. For example,
3821 sorting DNS records because real resolvers return them in an arbitrary
3822 order. The new test suite's fake resolver always returns records in the
3825 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3826 bounces) except when queue_only is set, to avoid logging races between
3827 the different processes.
3829 PH/38 Panic-die if .include specifies a non-absolute path.
3831 PH/39 A tweak to the "H" retry rule from its user.
3833 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3834 a label. They prevented compilation on older perls.
3836 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3837 a warning to be raised on newish perls.
3839 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3840 on queue. Changes to match documented behaviour of showing count of
3841 messages matching specified criteria.
3843 PH/40 Changed the default ident timeout from 30s to 5s.
3845 PH/41 Added support for the use of login_cap features, on those BSD systems
3846 that have them, for controlling the resources used by pipe deliveries.
3848 PH/42 The content-scanning code uses fopen() to create files in which to put
3849 message data. Previously it was not paying any attention to the mode of
3850 the files. Exim runs with umask(0) because the rest of the code creates
3851 files with open(), and sets the required mode explicitly. Thus, these
3852 files were ending up world-writeable. This was not a big issue, because,
3853 being within the spool directory, they were not world-accessible. I have
3854 created a function called modefopen, which takes an additional mode
3855 argument. It sets umask(777), creates the file, chmods it to the required
3856 mode, then resets the umask. All the relevant calls to fopen() in the
3857 content scanning code have been changed to use this function.
3859 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3860 to 24 hours. This avoids potential overflow problems when processing G
3861 and H retry rules. I suspect nobody ever tinkers with this value.
3863 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3865 PH/45 When the plaintext authenticator is running as a client, the server's
3866 challenges are checked to ensure they are valid base64 strings. By
3867 default, the authentication attempt is cancelled if an invalid string is
3868 received. Setting client_ignore_invalid_base64 true ignores these errors.
3869 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3870 they are received. Thus, the responses can be made to depend on the
3871 challenges. If an invalid string is ignored, an empty string is placed in
3874 PH/46 Messages that are created by the autoreply transport now contains a
3875 References: header, in accordance with RFCs 2822 and 3834.
3877 PH/47 Added authenticated_sender_force to the smtp transport.
3879 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3881 PH/49 Installed latest patch from the Sieve maintainer.
3883 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3884 was also set, the appendfile transport was unnecessarily scanning a
3885 directory of message files (e.g. for maildir delivery) to find the count
3886 of files (along with the size), even though it did not need this
3887 information. It now does the scan only if it needs to find either the
3888 size of the count of files.
3890 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3892 PH/52 Two bugs concerned with error handling when the smtp transport is
3895 (i) Exim was not creating retry information for temporary errors given
3896 for individual recipients after the DATA command when the smtp transport
3897 was used in LMTP mode. This meant that they could be retried too
3898 frequently, and not timed out correctly.
3900 (ii) Exim was setting the flag that allows error details to be returned
3901 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3902 recipients that were returned after the DATA command.
3904 PH/53 This is related to PH/52, but is more general: for any failing address,
3905 when detailed error information was permitted to be returned to the
3906 sender, but the error was temporary, then after the final timeout, only
3907 "retry timeout exceeded" was returned. Now it returns the full error as
3908 well as "retry timeout exceeded".
3910 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3911 do this, and (what is worse) MTAs that accept it.
3913 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3914 will now be deprecated.
3916 PH/56 New os.c-cygwin from the Cygwin maintainer.
3918 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3919 formats (previously only available in exim formats via -bpr, -bpru,
3920 and -bpra. Now also available in native and exiqgrep formats)
3922 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3923 with very large, slow to parse queues
3925 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3927 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3929 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3930 responses to authentication challenges, though it was showing the
3931 challenges; (ii) I've removed the CR characters from the debug output for
3934 PH/58 Allow for the insertion of a newline as well as a space when a string
3935 is turned into more than one encoded-word during RFC 2047 encoding. The
3936 Sieve code now uses this.
3938 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3939 data_4xx, lost_connection, tls_required.
3941 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3942 message was being sent as an SMTP response.
3944 PH/61 Add -l and -k options to exicyclog.
3946 PH/62 When verifying, if an address was redirected to one new address, so that
3947 verification continued, and the new address failed or deferred after
3948 having set something in $address_data, the value of $address_data was not
3949 passed back to the ACL. This was different to the case when no
3950 redirection occurred. The value is now passed back in both cases.
3952 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3953 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3954 use login_cap.h, so on its own it isn't the distinguishing feature. The
3955 new name refers directly to the setclassresources() function.
3957 PH/65 Added configuration files for NetBSD3.
3959 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3961 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3962 is preferred over IPv4.
3964 PH/68 The bounce_return_message and bounce_return_body options were not being
3965 honoured for bounces generated during the reception of non-SMTP messages.
3966 In particular, this applied to messages rejected by the ACL. This bug has
3967 been fixed. However, if bounce_return_message is true and bounce_return_
3968 body is false, the headers that are returned for a non-SMTP message
3969 include only those that have been read before the error was detected.
3970 (In the case of an ACL rejection, they have all been read.)
3972 PH/69 The HTML version of the specification is now built in a directory called
3973 spec_html instead of spec.html, because the latter looks like a path with
3974 a MIME-type, and this confuses some software.
3976 PH/70 Catch two compiler warnings in sieve.c.
3978 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3979 function verify_get_ident() calls ip_connect() to connect a socket, but
3980 if the "connect()" function timed out, ip_connect() used to close the
3981 socket. However, verify_get_ident() also closes the socket later, and in
3982 between Exim writes to the log, which may get opened at this point. When
3983 the socket was closed in ip_connect(), the log could get the same file
3984 descriptor number as the socket. This naturally causes chaos. The fix is
3985 not to close the socket in ip_connect(); the socket should be closed by
3986 the function that creates it. There was only one place in the code where
3987 this was missing, in the iplookup router, which I don't think anybody now
3988 uses, but I've fixed it anyway.
3990 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3991 well as to direct DNS lookups. Otherwise the handling of names in host
3992 lists is inconsistent and therefore confusing.
3998 PH/01 Two changes to the default runtime configuration:
4000 (1) Move the checks for relay_from_hosts and authenticated clients from
4001 after to before the (commented out) DNS black list checks.
4003 (2) Add control=submission to the relay_from_hosts and authenticated
4004 clients checks, on the grounds that messages accepted by these
4005 statements are most likely to be submissions.
4007 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4009 (1) Generate an error if the third argument for the ${prvs expansion is
4012 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4015 (3) Reset the variables that are obtained from the first argument of
4016 ${prvscheck and used in the second argument before leaving the code,
4017 because their memory is reclaimed, so using them afterwards may do
4020 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4021 one (it's much easier than Tom thought :-).
4023 (5) Because of (4), we can now allow for the use of $prvscheck_result
4024 inside the third argument.
4026 PH/03 For some reason, the default setting of PATH when running a command from
4027 a pipe transport was just "/usr/bin". I have changed it to
4030 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4031 anything to be listed in the output from -bV.
4033 PH/05 When a filter generated an autoreply, the entire To: header line was
4034 quoted in the delivery log line, like this:
4036 => >A.N.Other <ano@some.domain> <original@ddress> ...
4038 This has been changed so that it extracts the operative address. There
4039 may be more than one such address. If so, they are comma-separated, like
4042 => >ano@some.domain,ona@other.domain <original@ddress> ...
4044 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4045 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4046 not being looked up in the rDNS to get a host name, Exim was showing the
4047 IP address twice in Received: lines, even though the IP addresses were
4048 identical. For example:
4050 Received: from [1.2.3.4] (helo=[1.2.3.4])
4052 However, if the real host name was known, it was omitting the HELO data
4053 if it matched the actual IP address. This has been tidied up so that it
4054 doesn't show the same IP address twice.
4056 PH/07 When both +timestamp and +memory debugging was on, the value given by
4057 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4058 called by the debug printing, thereby overwriting the timestamp buffer.
4059 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4061 PH/08 When the original message was included in an autoreply transport, it
4062 always said "this is a copy of the message, including all the headers",
4063 even if body_only or headers_only was set. It now gives an appropriate
4066 PH/09 Applied a patch from the Sieve maintainer which:
4068 o fixes some comments
4069 o adds the (disabled) notify extension core
4070 o adds some debug output for the result of if/elsif tests
4071 o points to the current vacation draft in the documentation
4072 and documents the missing references header update
4076 o fixes a bug in processing the envelope test (when testing
4077 multiple envelope elements, the last element determined the
4080 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4081 Electronic Mail") by including:
4083 Auto-submitted: auto-generated
4085 in the messages that it generates (bounce messages and others, such as
4086 warnings). In the case of bounce messages for non-SMTP messages, there was
4087 also a typo: it was using "Auto_submitted" (underscore instead of
4088 hyphen). Since every message generated by Exim is necessarily in response
4089 to another message, thes have all been changed to:
4091 Auto-Submitted: auto-replied
4093 in accordance with these statements in the RFC:
4095 The auto-replied keyword:
4097 - SHOULD be used on messages sent in direct response to another
4098 message by an automatic process,
4100 - MUST NOT be used on manually-generated messages,
4102 - MAY be used on Delivery Status Notifications (DSNs) and Message
4103 Disposition Notifications (MDNs),
4105 - MUST NOT be used on messages generated by automatic or periodic
4106 processes, except for messages which are automatic responses to
4109 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4110 to the default Received: header definition.
4112 PH/12 Added log selector acl_warn_skipped (default on).
4114 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4115 variables because (a) they are in the wrong storage pool and (b) even if
4116 they were copied, it wouldn't work properly because of the caching.
4118 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4119 checking when decoding. Apparently there are clients that generate
4120 overlong encoded strings. Why am I not surprised?
4122 PH/15 If the first argument of "${if match_address" was not empty, but did not
4123 contain an "@" character, Exim crashed. Now it writes a panic log message
4124 and treats the condition as false.
4126 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4128 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4129 extension "envelope-auth". The code is finished and in agreement with
4130 other implementations, but there is no documentation so far and in fact,
4131 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4132 not changing the active code.
4134 Print executed "if" and "elsif" statements when debugging is used. This
4135 helps a great deal to understand what a filter does.
4137 Document more things not specified clearly in RFC3028. I had all this
4138 sorted out, when out of a sudden new issues came to my mind. Oops."
4140 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4143 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4144 canonical form (as documented). However, after a host name lookup from
4145 the IP address, check_host() was doing a simple string comparison with
4146 addresses acquired from the DNS when checking that the found name did
4147 have the original IP as one of its addresses. Since any found IPv6
4148 addresses are likely to be in abbreviated form, the comparison could
4149 fail. Luckily, there already exists a function for doing the comparison
4150 by converting both addresses to binary, so now that is used instead of
4151 the text comparison.
4153 PH/20 There was another similar case to PH/19, when a complete host name was
4154 given in a host list; looking up its IP address could give an abbreviated
4155 form, whereas the current host's name might or might not be abbreviated.
4156 The same fix has been applied.
4162 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4163 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4166 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4167 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4169 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4171 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4172 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4173 Also, for "Auto-Submitted", treat anything other than "no" as
4174 non-personal, in accordance with RFC 3834. (Previously it treated
4175 anything starting "auto-" as non-personal.)
4177 TF/01 The control=submission/name=... option had a problem with syntax
4178 errors if the name included a slash character. The /name= option
4179 now slurps the rest of the string, so it can include any characters
4180 but it must come last in the list of options (after /sender_retain
4183 PH/05 Some modifications to the interface to the fake nameserver for the new
4191 TK/01 Added the "success_on_redirect" address verification option. See
4192 NewStuff for rationale and an example.
4194 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4196 PH/02 Patch to exigrep to allow it to work on syslog lines.
4198 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4199 fread() to skip over the body file's header line, because in Cygwin the
4200 header line is locked and is inaccessible.
4202 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4203 co-exist for some time) to make it clear that it is the Exim ID that is
4204 referenced, not the Message-ID: header line.
4206 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4207 string_format() function, because snprintf() does not exist on all
4210 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4211 ${stat: expansion item.
4213 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4214 protocol synchronization error", to keep the pedants happy.
4216 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4217 well as for IRIX systems, when gcc is being used. See the host.c source
4220 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4222 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4225 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4226 transport and to the smtp transport in LMTP mode.
4228 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4230 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4231 run a filter in a subprocess. This could lead to confusion in subsequent
4232 lookups in the parent process. There should also be a search_tidyup() at
4233 the end of the subprocess.
4235 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4236 only if the host matched helo_try_verify_hosts, which caused the
4237 verification to occur when the EHLO/HELO command was issued. The ACL just
4238 tested the remembered result. Now, if a previous verification attempt has
4239 not happened, "verify = helo" does it there and then.
4241 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4243 TK/03 Fix log output including CR from clamd.
4245 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4246 exist provoked a memory error which could cause a segfault.
4248 PH/15 Installed PCRE 6.2
4250 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4252 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4253 of the problem. Specifically, suggested +O2 rather than +O1 for the
4256 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4258 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4259 record, the port was not correctly logged when the outgoing_port log
4260 selector was set (it logged the transort's default port).
4262 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4263 fallback_hosts, and "hosts" in the smtp transport.
4265 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4266 host errors such as "Connection refused".
4268 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4269 authentication with radiusclient 0.4.9:
4271 - Error returned from rc_read_config was caught wrongly
4272 - Username/password not passed on to radius server due to wrong length.
4274 The presumption is that some radiusclient API changes for 4.51/PH/17
4275 were not taken care of correctly. The code is still untested by me (my
4276 Linux distribution still has 0.3.2 of radiusclient), but it was
4277 contributed by a Radius user.
4279 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4280 expanding the "port" option of the smtp transport.
4282 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4283 while reading a MIME header. Thanks to Tom Hughes for a patch.
4285 PH/24 Include config.h inside local_scan.h so that configuration settings are
4288 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4289 that in an ACL for RCPT (for example), you can examine exactly what was
4292 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4293 commands, but it was not correctly comparing the address with the actual
4294 client host address. Thus, it would show the EHLO address in Received:
4295 header lines when this was not necessary.
4297 PH/27 Added the % operator to ${eval:}.
4299 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4300 it should be ignoring failures (because with -C, for example, it has lost
4301 privilege). It wasn't ignoring creation failures other than "already
4304 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4307 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4308 because an input line was too long, either on its own, or by virtue of
4309 too many continuations, the temporary file was not being removed, and the
4310 return code was incorrect.
4312 PH/31 Missing "BOOL" in function definition in filtertest.c.
4314 PH/32 Applied Sieve patches from the maintainer.
4316 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4318 PH/33 Added "verify = not_blind".
4320 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4321 Local/Makefile (with some defaults set). These are used in built scripts
4322 such as exicyclog, but they have never been used in the exim_install
4323 script (though there are many overriding facilities there). I have
4324 arranged that the exim_install script now takes note of these two
4327 PH/35 Installed configuration files for Dragonfly.
4329 PH/36 When a locally submitted message by a trusted user did not contain a
4330 From: header, and the sender address was obtained from -f or from an SMTP
4331 MAIL command, and the trusted user did not use -F to supply a sender
4332 name, $originator_name was incorrectly used when constructing a From:
4333 header. Furthermore, $originator_name was used for submission mode
4334 messages from external hosts without From: headers in a similar way,
4335 which is clearly wrong.
4337 PH/37 Added control=suppress_local_fixups.
4339 PH/38 When log_selector = +received_sender was set, and the addition of the
4340 sender made the log line's construction buffer exactly full, or one byte
4341 less than full, an overflow happened when the terminating "\n" was
4344 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4345 when the result of a list match is failure because a DNS lookup failed.
4347 PH/40 RM_COMMAND is now used in the building process.
4349 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4350 the "build-* directories that it finds.
4352 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4353 address in a domain literal was a prefix of an interface address.
4355 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4356 when verifying a sender address, unless rewrite_headers is false.
4358 PH/44 Wrote a long comment about why errors_to addresses are verified as
4359 recipients, not senders.
4361 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4362 the ratelimit ACL was added.
4364 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4366 PH/46 Added extra information about PostgreSQL errors to the error string.
4368 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4369 avoiding the need to install special zones in a real server. This is
4370 backwards compatible; if it can't find the fake resolver, it drops back.
4371 Thus, both old and new test suites can be run.
4373 TF/02 Added util/ratelimit.pl
4375 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4376 clock is set back in time.
4378 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4379 Candler <B.Candler@pobox.com>.
4381 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4382 OK for addresses that are the result of redirections.
4384 PH/48 A number of further additions for the benefit of the new test suite,
4385 including a fake gethostbyname() that interfaces to the fake DNS resolver
4388 TF/06 The fix for widen_domains has also been applied to qualify_single and
4389 search_parents which are the other dnslookup options that can cause
4392 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4395 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4397 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4398 service" if it encountered an MX record with an empty target hostname.
4399 The message is now "an MX or SRV record indicated no SMTP service".
4401 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4402 if the DNS of the sending site is misconfigured. This is quite a
4403 common situation. This change restores the behaviour of treating a
4404 helo verification defer as a failure.
4406 PH/51 If self=fail was set on a router, the bounce message did not include the
4407 actual error message.
4413 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4415 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4416 command itself ended in error, the underlying message about the transport
4417 filter timeout was being overwritten with the pipe command error. Now the
4418 underlying error message should be appended to the second error message.
4420 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4422 PH/02 Reduce the amount of output that "make" produces by default. Full output
4423 can still be requested.
4425 PH/03 The warning log line about a condition test deferring for a "warn" verb
4426 was being output only once per connection, rather than after each
4427 occurrence (because it was using the same function as for successful
4428 "warn" verbs). This seems wrong, so I have changed it.
4430 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4431 it should not have, which might have caused a crash in the right
4432 circumstances, but probably never did.
4434 PH/04 Installed a modified version of Tony Finch's patch to make submission
4435 mode fix the return path as well as the Sender: header line, and to
4436 add a /name= option so that you can make the user's friendly name appear
4439 TF/03 Added the control = fakedefer ACL modifier.
4441 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4442 Mark Lowes for thorough testing.
4444 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4446 TK/03 Merged latest SRS patch from Miles Wilton.
4448 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4449 with the definition in sysexits.h (which is #included earlier).
4450 Fortunately, Exim does not actually use EX_OK. The code used to try to
4451 preserve the sysexits.h value, by assuming that macro definitions were
4452 scanned for macro replacements. I have been disabused of this notion,
4453 so now the code just undefines EX_OK before #including unistd.h.
4455 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4456 in the smtp transport. When a block could not be written in a single
4457 write() function, the timeout was being re-applied to each part-write.
4458 This seems wrong - if the receiver was accepting one byte at a time it
4459 would take for ever. The timeout is now adjusted when this happens. It
4460 doesn't have to be particularly precise.
4462 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4463 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4465 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4466 without a domain if the check to <postmaster@domain> fails.
4468 SC/01 Eximstats: added -xls and the ability to specify output files
4469 (patch written by Frank Heydlauf).
4471 SC/02 Eximstats: use FileHandles for outputting results.
4473 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4475 SC/04 Eximstats: fixed display of large numbers with -nvr option
4477 SC/05 Eximstats: fixed merging of reports with empty tables.
4479 SC/06 Eximstats: added the -include_original_destination flag
4481 SC/07 Eximstats: removed tabs and trailing whitespace.
4483 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4485 TK/06 MBOX spool code: Add real "From " MBOX separator line
4486 so the .eml file is really in mbox format (even though
4487 most programs do not really care). Patch from Alex Miller.
4489 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4490 The latter is generated from $received_to and is only set if the
4491 message has one envelope recipient. SA can use these headers,
4492 obviously out-of-the-box. Patch from Alex Miller.
4494 PH/08 The ${def test on a variable was returning false if the variable's
4495 value was "0", contrary to what the specification has always said!
4496 The result should be true unless the variable is empty.
4498 PH/09 The syntax error of a character other than { following "${if
4499 def:variable_name" (after optional whitespace) was not being diagnosed.
4500 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4501 accidental colon was present, for example, could give incorrect results.
4503 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4504 result is used (not including appendfile, where other changes are about
4507 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4508 This involved changing a lot of size variables from int to off_t. It
4509 should work with maildirs and everything.
4511 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4512 spamd dying while we are connected to it.
4514 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4517 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4518 function for BDB 4.3.
4520 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4522 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4523 the sources for PCRE have been re-arranged and more files are now
4526 PH/15 The code I had for printing potentially long long variables in PH/11
4527 above was not the best (it lost precision). The length of off_t variables
4528 is now inspected at build time, and an appropriate printing format (%ld
4529 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4530 to be "long long int" or "long int". This is needed for the internal
4531 formatting function string_vformat().
4533 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4534 the configuration file to be ":syslog", then the script "guesses" where
4535 the logs files are, rather than using the compiled in default. In our
4536 case the guess is not the same as the compiled default, so the script
4537 suddenly stopped working when I started to use syslog. The patch checks
4538 to see if log_file_path is "". If so, it attempts to read it from exim
4539 with no configuration file to get the compiled in version, before it
4540 falls back to the previous guessing code."
4542 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4543 implementing BATV in an Exim configuration. See NewStuff for the gory
4546 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4547 Makefile that are specific to HP-UX.
4549 PH/18 If the "use_postmaster" option was set for a recipient callout together
4550 with the "random" option, the postmaster address was used as the MAIL
4551 FROM address for the random test, but not for the subsequent recipient
4552 test. It is now used for both.
4554 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4555 patch removes a few documentation additions to RFC 3028, because the
4556 latest draft now contains them. It adds the new en;ascii-case comparator
4557 and a new error check for 8bit text in MIME parts. Comparator and
4558 require names are now matched exactly. I enabled the subaddress
4559 extension, but it is not well tested yet (read: it works for me)."
4561 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4562 rework some of the code of TK/09 above to avoid the hardwired use of
4563 "%lld" and "long long". Replaced the call to snprintf() with a call to
4566 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4567 records point to non-existent hosts", "retry timeout exceeded", and
4568 "retry time not reached for any host after a long failure period".
4570 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4571 experimental DomainKeys support:
4573 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4574 (2) On an error such as an illegally used "control", the wrong name for
4575 the control was given.
4577 These problems did NOT occur unless DomainKeys support was compiled.
4579 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4581 PH/24 Added ${if match_ip condition.
4583 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4584 databases so that it will be absolutely obvious if a crash occurs in the
4585 DB library. This is a regular occurrence (often caused by mis-matched
4588 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4589 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4590 picked up on a user's system that detects such things. There doesn't seem
4591 to be a gcc warning option for this - only an attribute that has to be
4592 put on the function's prototype. It seems that in Fedora Core 4 they have
4593 set this on a number of new functions. No doubt there will be more in due
4596 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4597 specify a transport. However, if an address that was verified by such a
4598 router was the subject of a callout, Exim crashed because it tried to
4599 read the rcpt_include_affixes from the non-existent transport. Now it
4600 just assumes that the setting of that option is false. This bug was
4601 introduced by 4.51/PH/31.
4603 PH/28 Changed -d+all to exclude +memory, because that information is very
4604 rarely of interest, but it makes the output a lot bigger. People tend to
4605 do -d+all out of habit.
4607 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4608 code in os-type was giving problems when libc.so lives in lib64, like on
4611 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4612 aren't the modern standard, and it seems that some systems' include files
4613 don't always have them. Exim was already checking for some of the newer
4614 ones like T_AAAA, and defining it itself. I've added checks for all the
4615 record types that Exim uses.
4617 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4618 not automatically generating a new one, as it is supposed to. This
4619 prevented TLS from working. If the file did exist, but contained invalid
4620 data, a new version was generated, as expected. It was only the case of a
4621 non-existent file that was broken.
4623 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4624 with a change in libdomainkeys > 0.64.
4626 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4627 from DNS. If the selector record carries the flag, it now has
4628 precedence over the domain-wide flag.
4630 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4632 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4633 the use of a port name that isn't defined in /etc/services) occurred, the
4634 message was deferred as in a normal delivery, and thus remained on the
4635 spool, instead of being failed because of the mua_wrapper setting. This
4636 is now fixed, and I tidied up some of the mua_wrapper messages at the
4639 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4640 the messages in a hash of arrays rather than using individual hashes.
4641 This is a bit cleaner and results in dramatic memory savings, albeit
4642 at a slight CPU cost.
4644 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4645 as requested by Marc Sherman.
4647 SC/10 Eximstats: added histograms for user specified patterns as requested
4650 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4652 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4653 fopen() in the content-scanning modules that did not already have it.
4659 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4660 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4662 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4664 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4666 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4667 to test Sieve filters that use "vacation".
4669 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4670 that changes the way the GnuTLS parameters are stored in the cache file.
4671 The new format can be generated externally. For backward compatibility,
4672 if the data in the cache doesn't make sense, Exim assumes it has read an
4673 old-format file, and it generates new data and writes a new file. This
4674 means that you can't go back to an older release without removing the
4677 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4678 work if there are any delivery delays because "one_time" forces the
4679 parent to be marked "delivered", so its unseen clone is never tried
4680 again. For this reason, Exim now forbids the simultaneous setting of
4683 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4684 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4685 entry if you want to know the details. The fix, however, neglected to
4686 consider the case when local delivery batching is involved. The test for
4687 "previously delivered" was not happening when checking to see if an
4688 address could be batched with a previous (undelivered) one; under
4689 certain circumstances this could lead to multiple deliveries to the same
4692 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4693 in its include files, and this causes problems building Exim.
4695 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4696 header_syntax) but Exim was just ignoring anything given after a slash.
4697 In particular, this caused confusion with an attempt to use "verify =
4698 reverse_host_lookup/defer_ok". An error is now given when options are
4699 supplied for verify items that do not have them. (Maybe reverse_host_
4700 lookup should have a defer_ok option, but that's a different point.)
4702 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4703 defined by RFC 821) to 2048, because there were problems with some AUTH
4704 commands, and RFC 1869 says the size should be increased for extended
4705 SMTP commands that take arguments.
4707 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4710 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4711 "unknown" error; now it says that the functionality isn't in the binary.
4713 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4714 an address' error message when a string expansion fails (syntax or
4715 whatever). Otherwise the password may appear in the log. Following change
4716 PH/42 below, there is no longer a chance of it appearing in a bounce
4719 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4721 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4722 of its addresses was ever tried. (Bugzilla bug #2.)
4724 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4725 the result incorrectly in the debug output. (It correctly added a newline
4726 to what was transported.)
4728 TF/01 Added $received_time.
4730 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4731 commented out examples of how to interface to a virus scanner and to
4732 SpamAssassin. Also added commented examples of av_scanner and
4733 spamd_address settings.
4735 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4736 and controls are allowed in which ACLs. There were a couple of minor
4737 errors. Some of the entries in the conditions table (which is a table of
4738 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4739 negation of where the condition IS allowed.
4741 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4743 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4744 header file does not have a version number, so I've had to invent a new
4745 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4746 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4747 radiusclient), but it was contributed by a Radius user.
4749 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4750 files or directories, for OpenSSL.
4752 PH/19 When an Exim process that is running as root has to create an Exim log
4753 file, it does so in a subprocess that runs as exim:exim so as to get the
4754 ownership right at creation (otherwise, other Exim processes might see
4755 the file with the wrong ownership). There was no test for failure of this
4756 fork() call, which would lead to the process getting stuck as it waited
4757 for a non-existent subprocess. Forks do occasionally fail when resources
4758 run out. I reviewed all the other calls to fork(); they all seem to check
4761 PH/20 When checking for unexpected SMTP input at connect time (before writing
4762 the banner), Exim was not dealing correctly with a non-positive return
4763 from the read() function. If the client had disconnected by this time,
4764 the result was a log entry for a synchronization error with an empty
4765 string after "input=" when read() returned zero. If read() returned -1
4766 (an event I could not check), uninitialized data bytes were printed.
4767 There were reports of junk text (parts of files, etc) appearing after
4770 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4772 PH/22 Added support for macro redefinition, and (re)definition in between
4773 driver and ACL definitions.
4775 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4776 forgetting to use the resulting value; it was using the unexpanded value.
4778 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4779 hadn't been configured. The fix is from Juergen Kreileder, who
4780 understands it better than I do:
4782 "Here's what I see happening with three configured cyrus_sasl
4783 authenticators configured (plain, login, cram-md5):
4785 On startup auth_cyrus_sasl_init() gets called for each of these.
4786 This means three calls to sasl_listmech() without a specified mech_list.
4787 => SASL tests which mechs of all available mechs actually work
4788 => three warnings about OTP not working
4789 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4791 With the patch, sasl_listmech() also gets called three times. But now
4792 SASL's mech_list option is set to the server_mech specified in the the
4793 authenticator. Or in other words, the answer from sasl_listmech()
4794 gets limited to just the mech you're testing for (which is different
4796 => the return list contains just 'plain' or 'login', 'cram-md5' or
4797 nothing depending on the value of ob->server_mech.
4799 I've just tested the patch: Authentication still works fine,
4800 unavailable mechs specified in the exim configuration are still
4801 caught, and the auth.log warnings about OTP are gone."
4803 PH/25 When debugging is enabled, the contents of the command line are added
4804 to the debugging output, even when log_selector=+arguments is not
4807 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4808 answer is "GNU", and only if the return is "GNU/something" is the answer
4811 PH/27 $acl_verify_message is now set immediately after the failure of a
4812 verification in an ACL, and so is available in subsequent modifiers. In
4813 particular, the message can be preserved by coding like this:
4815 warn !verify = sender
4816 set acl_m0 = $acl_verify_message
4818 Previously, $acl_verify_message was set only while expanding "message"
4819 and "log_message" when a very denied access.
4821 PH/28 Modified OS/os.c-Linux with
4823 -#ifndef OS_LOAD_AVERAGE
4824 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4826 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4827 nomenclature these days.)
4829 PH/29 Installed patch from the Sieve maintainer that adds the options
4830 sieve_useraddress and sieve_subaddress to the redirect router.
4832 PH/30 In these circumstances:
4833 . Two addresses routed to the same list of hosts;
4834 . First host does not offer TLS;
4835 . First host accepts first address;
4836 . First host gives temporary error to second address;
4837 . Second host offers TLS and a TLS session is established;
4838 . Second host accepts second address.
4839 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4840 and peerdn, if requested) that were in fact used only for the second
4843 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4844 attention to any local part prefix or suffix that was matched by the
4845 router that accepted the address. It now behaves in the same way as it
4846 does for delivery: the affixes are removed from the local part unless
4847 rcpt_include_affixes is set on the transport.
4849 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4850 timeout during the DATA phase of an incoming message.
4852 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4853 applied a patch sanctioned by the Sieve maintainer.
4855 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4856 the uid or gid is negative. A case of a negative gid caused this to be
4857 noticed. The fix allows for either to be negative.
4859 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4860 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4863 PH/36 The change PH/12 above was broken. Fixed it.
4865 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4866 the grounds that routing the same address twice would always produce the
4867 same answer. This might have been true once, but it is certainly no
4868 longer true now. Routing a child address may depend on the previous
4869 routing that produced that child. Some complicated redirection strategies
4870 went wrong when messages had multiple recipients, and made Exim's
4871 behaviour dependent on the order in which the addresses were given.
4873 I have moved the duplicate checking until after the routing is complete.
4874 Exim scans the addresses that are assigned to local and remote
4875 transports, and removes any duplicates. This means that more work will be
4876 done, as duplicates will always all be routed, but duplicates are
4877 presumably rare, so I don't expect this is of any significance.
4879 For deliveries to pipes, files, and autoreplies, the duplicate checking
4880 still happens during the routing process, since they are not going to be
4883 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4884 It corrects a timeout issue with spamd. This is Ian's comment: "The
4885 background is that sometimes spamd either never reads data from a
4886 connection it has accepted, or it never writes response data. The exiscan
4887 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4888 blindly assumes that writes won't block so it may never time out."
4890 PH/39 Allow G after quota size as well as K and M.
4892 PH/40 The value set for $authenticated_id in an authenticator may not contain
4893 binary zeroes or newlines because the value is written to log lines and
4894 to spool files. There was no check on this. Now the value is run through
4895 the string_printing() function so that such characters are converted to
4896 printable escape sequences.
4898 PH/41 $message_linecount is a new variable that contains the total number of
4899 lines in the message. Compare $body_linecount, which is the count for the
4902 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4903 bounce and delay warning messages, except in certain special cases, which
4906 (a) An SMTP error message from a remote host;
4907 (b) A message specified in a :fail: redirection;
4908 (c) A message specified in a "fail" command in a system filter;
4909 (d) A message specified in a FAIL return from the queryprogram router;
4910 (e) A message specified by the cannot_route_message router option.
4912 In these cases only, Exim does include the error details in bounce and
4913 warning messages. There are also a few cases where bland messages such
4914 as "unrouteable address" or "local delivery error" are given.
4916 PH/43 $value is now also set for the "else" part of a ${run expansion.
4918 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4919 being worked on, but at least Exim now implements the latest version to
4922 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4923 process to complete was treated as a delivery failure, a timeout while
4924 writing the message to the pipe was logged, but erroneously treated as a
4925 successful delivery. Such timeouts include transport filter timeouts. For
4926 consistency with the overall process timeout, these timeouts are now
4927 treated as errors, giving rise to delivery failures by default. However,
4928 there is now a new Boolean option for the pipe transport called
4929 timeout_defer, which, if set TRUE, converts the failures into defers for
4930 both kinds of timeout. A transport filter timeout is now identified in
4933 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4934 systems where "make" and "gmake" are different, calling "gmake" at top
4935 level broke things. I've arranged for the value of $(MAKE) to be passed
4936 from the Makefile to this script so that it can call the same version of
4940 A note about Exim versions 4.44 and 4.50
4941 ----------------------------------------
4943 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4944 changes of various kinds. As a consequence, a big documentation update was
4945 needed. This delayed the release for rather longer than seemed good, especially
4946 in the light of a couple of (minor) security issues. Therefore, the changes
4947 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4948 release. So 4.44 and 4.50 are in effect two different branches that both start
4951 I have left the 4.50 change log unchanged; it contains all the changes since
4952 4.43. The change log for 4.44 is below; many of its items are identical to
4953 those for 4.50. This seems to be the most sensible way to preserve the
4954 historical information.
4960 1. Minor wording change to the doc/README.SIEVE file.
4962 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4963 computation of the current number of files was incorrect.
4965 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4966 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4969 4. Give more explanation in the error message when the command for a transport
4970 filter fails to execute.
4972 5. There are several places where Exim runs a non-Exim command in a
4973 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4974 was being done only for the command run by the queryprogram router. It is
4975 now done for all such subprocesses. The other cases are: ${run, transport
4976 filters, and the commands run by the lmtp and pipe transports.
4978 6. Added CONFIGURE_GROUP build-time option.
4980 7. Some older OS have a limit of 256 on the maximum number of file
4981 descriptors. Exim was using setrlimit() to set 1000 as a large value
4982 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4983 systems. I've change it so that if it can't get 1000, it tries for 256.
4985 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4986 was an oversight, and furthermore, ever since the addition of extra
4987 controls (e.g. 4.43/32), the checks on when to allow different forms of
4988 "control" were broken. There should now be diagnostics for all cases when a
4989 control that does not make sense is encountered.
4991 9. Added the /retain_sender option to "control=submission".
4993 10. $recipients is now available in the predata ACL (oversight).
4995 11. Tidy the search cache before the fork to do a delivery from a message
4996 received from the command line. Otherwise the child will trigger a lookup
4997 failure and thereby defer the delivery if it tries to use (for example) a
4998 cached ldap connection that the parent has called unbind on.
5000 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5001 of $address_data from the recipient verification was clobbered by the
5002 sender verification.
5004 13. The value of address_data from a sender verification is now available in
5005 $sender_address_data in subsequent conditions in the ACL statement.
5007 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5009 15. Added a new option "connect=<time>" to callout options, to set a different
5012 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5013 was its contents. (It was OK if the option was not defined at all.)
5015 17. A "Completed" log line is now written for messages that are removed from
5016 the spool by the -Mrm option.
5018 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5019 information about exactly what failed.
5021 19. Added -dd to debug only the daemon process.
5023 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5024 handles timeouts, both on the server side and network timeouts. Renamed the
5025 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5027 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5028 It is now set to "smtps".
5030 22. $host_address is now set to the target address during the checking of
5031 ignore_target_hosts.
5033 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5034 being passed; this would have caused $sender_host_name to have been used if
5035 matching the list had actually called for a host name (not very likely,
5036 since this list is usually IP addresses). A host name is now passed as
5039 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5040 code that specifies a non-restarting handler (typically sigaction() in
5041 modern systems) in an attempt to fix a rare and obscure crash bug.
5043 25. Narrowed the window for a race in the daemon that could cause it to ignore
5044 SIGCHLD signals. This is not a major problem, because they are used only to
5045 wake it up if nothing else does.
5047 26. A malformed maildirsize file could cause Exim to calculate negative values
5048 for the mailbox size or file count. Odd effects could occur as a result.
5049 The maildirsize information is now recalculated if the size or filecount
5052 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5053 support for a long time. Removed HAVE_SYS_VFS_H.
5055 28. Installed the latest version of exipick from John Jetmore.
5057 29. In an address list, if the pattern was not a regular expression, an empty
5058 subject address (from a bounce message) matched only if the pattern was an
5059 empty string. Non-empty patterns were not even tested. This was the wrong
5060 because it is perfectly reasonable to use an empty address as part of a
5061 database query. An empty address is now tested by patterns that are
5062 lookups. However, all the other forms of pattern expect the subject to
5063 contain a local part and a domain, and therefore, for them, an empty
5064 address still always fails if the pattern is not itself empty.
5066 30. Exim went into a mad DNS loop when attempting to do a callout where the
5067 host was specified on an smtp transport, and looking it up yielded more
5068 than one IP address.
5070 31. Re-factored the code for checking spool and log partition space into a
5071 function that finds that data and another that does the check. The former
5072 is then used to implement four new variables: $spool_space, $log_space,
5073 $spool_inodes, and $log_inodes.
5075 32. The RFC2047 encoding function was originally intended for short strings
5076 such as real names; it was not keeping to the 75-character limit for
5077 encoded words that the RFC imposes. It now respects the limit, and
5078 generates multiple encoded words if necessary. To be on the safe side, I
5079 have increased the buffer size for the ${rfc2047: expansion operator from
5082 33. It is now permitted to omit both strings after an "if" condition; if the
5083 condition is true, the result is "true". As before, when the second string
5084 is omitted, a false condition yields an empty string. This makes it less
5085 cumbersome to write custom ACL and router conditions.
5087 34. Failure to deliver a bounce message always caused it to be frozen, even if
5088 there was an errors_to setting on the router. The errors_to setting is now
5091 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5092 canonical form (fully expanded) before being placed in
5093 $sender_host_address.
5095 36. The table in the code that translates DNS record types into text (T_A to
5096 "A" for instance) was missing entries for NS and CNAME. It is just possible
5097 that this could have caused confusion if both these types were looked up
5098 for the same domain, because the text type is used as part of Exim's
5099 per-process caching. But the chance of anyone hitting this buglet seems
5102 37. The dnsdb lookup has been extended in a number of ways.
5104 (1) There is a new type, "zns", which walks up the domain tree until it
5105 finds some nameserver records. It should be used with care.
5107 (2) There is a new type, "mxh", which is like "mx" except that it returns
5108 just the host names, not the priorities.
5110 (3) It is now possible to give a list of domains (or IP addresses) to be
5111 looked up. The behaviour when one of the lookups defers can be
5112 controlled by a keyword.
5114 (4) It is now possible to specify the separator character for use when
5115 multiple records are returned.
5117 38. The dnslists ACL condition has been extended: it is now possible to supply
5118 a list of IP addresses and/or domains to be looked up in a particular DNS
5121 39. Added log_selector=+queue_time_overall.
5123 40. When running the queue in the test harness, wait just a tad after forking a
5124 delivery process, to get repeatability of debugging output.
5126 41. Include certificate and key file names in error message when GnuTLS fails
5127 to set them up, because the GnuTLS error message doesn't include the name
5128 of the failing file when there is a problem reading it.
5130 42. Allow both -bf and -bF in the same test run.
5132 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5134 44. The "Exiscan patch" is now merged into the mainline Exim source.
5136 45. Sometimes the final signoff response after QUIT could fail to get
5137 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5138 < 0 before doing a fflush(). This bug looks as though it goes back to the
5139 introduction of TLS in release 3.20, but "sometimes" must have been rare
5140 because the tests only now provoked it.
5142 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5143 (this can affect the format of dates).
5145 47. exim_tidydb, when checking for the continued existence of a message for
5146 which it has found a message-specific retry record, was not finding
5147 messages that were in split spool directories. Consequently, it was
5148 deleting retry records that should have stayed in existence.
5150 48. Steve fixed some bugs in eximstats.
5152 49. The SPA authentication driver was not abandoning authentication and moving
5153 on to the next authenticator when an expansion was forced to fail,
5154 contradicting the general specification for all authenticators. Instead it
5155 was generating a temporary error. It now behaves as specified.
5157 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5158 (the order specifies the preference for clients). The order is now AES256,
5159 AES128, 3DES, ARCFOUR128.
5161 51. Small patch to Sieve code - explicitly set From: when generating an
5164 52. Exim crashed if a remote delivery caused a very long error message to be
5165 recorded - for instance if somebody sent an entire SpamAssassin report back
5166 as a large number of 550 error lines. This bug was coincidentally fixed by
5167 increasing the size of one of Exim's internal buffers (big_buffer) that
5168 happened as part of the Exiscan merge. However, to be on the safe side, I
5169 have made the code more robust (and fixed the comments that describe what
5172 53. Now that there can be additional text after "Completed" in log lines (if
5173 the queue_time_overall log selector is set), a one-byte patch to exigrep
5174 was needed to allow it to recognize "Completed" as not the last thing in
5177 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5178 patch that reportedly fixes this has been added. I am not expert enough to
5179 create a test for it. This is what the patch creator wrote:
5181 "I found a little strange behaviour of ldap code when working with
5182 Windows 2003 AD Domain, where users was placed in more than one
5183 Organization Units. When I tried to give exim partial DN, the exit code
5184 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5185 But simultaneously result of request was absolutely normal ldap result,
5186 so I produce this patch..."
5188 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5189 REFERENCE, so I have modified the code to exclude the patch when that macro
5192 55. Some experimental protocols are using DNS PTR records for new purposes. The
5193 keys for these records are domain names, not reversed IP addresses. The
5194 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5195 leaves it alone. Component reversal etc. now happens only for IP addresses.
5198 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5200 57. Double the size of the debug message buffer (to 2048) so that more of very
5201 long debug lines gets shown.
5203 58. The exicyclog utility now does better if the number of log files to keep
5204 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5206 59. Two changes related to the smtp_active_hostname option:
5208 (1) $smtp_active_hostname is now available as a variable.
5209 (2) The default for smtp_banner uses $smtp_active_hostname instead
5210 of $primary_hostname.
5212 60. The host_aton() function is supposed to be passed a string that is known
5213 to be a valid IP address. However, in the case of IPv6 addresses, it was
5214 not checking this. This is a hostage to fortune. Exim now panics and dies
5215 if the condition is not met. A case was found where this could be provoked
5216 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5217 components; fortuitously, this particular loophole had already been fixed
5218 by change 4.50/55 above.
5220 If there are any other similar loopholes, the new check in host_aton()
5221 itself should stop them being exploited. The report I received stated that
5222 data on the command line could provoke the exploit when Exim was running as
5223 exim, but did not say which command line option was involved. All I could
5224 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5225 running as the user.
5228 61. There was a buffer overflow vulnerability in the SPA authentication code
5229 (which came originally from the Samba project). I have added a test to the
5230 spa_base64_to_bits() function which I hope fixes it.
5233 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5234 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5236 63. The daemon start-up calls getloadavg() while still root for those OS that
5237 need the first call to be done as root, but it missed one case: when
5238 deliver_queue_load_max is set with deliver_drop_privilege. This is
5239 necessary for the benefit of the queue runner, because there is no re-exec
5240 when deliver_drop_privilege is set.
5242 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5243 This has been fixed.
5245 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5246 was in use, was not putting the data itself into the right store pool;
5247 consequently, it could be overwritten for a subsequent message in the same
5248 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5251 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5253 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5254 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5255 the function were treating the return as a boolean value, which happened to
5256 work because 0=false and not-0=true, but is not correct code.
5258 68. The host_aton() function was not handling scoped IPv6 addresses (those
5259 with, for example, "%eth0" on the end) correctly.
5261 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5262 negated items (that is, ~something) in unsigned ints. Some compilers
5263 apparently mutter when there is no cast.
5265 70. If an address verification called from an ACL failed, and did not produce a
5266 user-specific message (i.e. there was only a "system" message), nothing was
5267 put in $acl_verify_message. In this situation, it now puts the system
5270 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5271 session; change 4.31/43 added the unwanted input to the log line - except
5272 that it did not do this in the start of session case. It now does.
5274 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5275 This is wrong and can cause the other end to generate a synchronization
5276 error if it is another Exim or anything else that does the synchronization
5277 check. A QUIT command is no longer sent after a timeout.
5279 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5280 during host lookups.
5282 74. The defer_ok option of callout verification was not working if it was used
5283 when verifying addresses in header lines, that is, for this case:
5285 verify = header_sender/callout=defer_ok
5287 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5288 those file descriptors could be used for SMTP connections. If anything
5289 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5290 could be sent to the SMTP client, causing chaos. The daemon now opens
5291 stdin, stdout, and stderr to /dev/null when it puts itself into the
5294 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5295 log by default. The user can override this with suitable Perl magic.
5297 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5298 the log message when discard triggers, was not working for the DATA ACL or
5299 for the non-SMTP ACL.
5301 78. Error message wording change in sieve.c.
5303 79. If smtp_accept_max_per_host was set, the number of connections could be
5304 restricted to fewer than expected, because the daemon was trying to set up
5305 a new connection before checking whether the processes handling previous
5306 connections had finished. The check for completed processes is now done
5307 earlier. On busy systems, this bug wouldn't be noticed because something
5308 else would have woken the daemon, and it would have reaped the completed
5311 80. If a message was submitted locally by a user whose login name contained one
5312 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5313 It caused a spool format error. I have fixed the spool reading code. A
5314 related problem was that the "from" clause in the Received: line became
5315 illegal because of the space(s). It is now covered by ${quote_local_part.
5317 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5320 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5322 83. Patch from Sieve maintainer to fix unterminated string problem in
5323 "vacation" handling.
5325 84. Some minor changes to the Linux configuration files to help with other
5326 OS variants using glibc.
5328 85. One more patch for Sieve to update vacation handling to latest spec.
5331 ----------------------------------------------------
5332 See the note above about the 4.44 and 4.50 releases.
5333 ----------------------------------------------------
5339 1. Change 4.43/35 introduced a bug that caused file counts to be
5340 incorrectly computed when quota_filecount was set in an appendfile
5343 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5344 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5347 3. Give more explanation in the error message when the command for a transport
5348 filter fails to execute.
5350 4. There are several places where Exim runs a non-Exim command in a
5351 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5352 was being done only for the command run by the queryprogram router. It is
5353 now done for all such subprocesses. The other cases are: ${run, transport
5354 filters, and the commands run by the lmtp and pipe transports.
5356 5. Some older OS have a limit of 256 on the maximum number of file
5357 descriptors. Exim was using setrlimit() to set 1000 as a large value
5358 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5359 systems. I've change it so that if it can't get 1000, it tries for 256.
5361 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5362 was an oversight, and furthermore, ever since the addition of extra
5363 controls (e.g. 4.43/32), the checks on when to allow different forms of
5364 "control" were broken. There should now be diagnostics for all cases when a
5365 control that does not make sense is encountered.
5367 7. $recipients is now available in the predata ACL (oversight).
5369 8. Tidy the search cache before the fork to do a delivery from a message
5370 received from the command line. Otherwise the child will trigger a lookup
5371 failure and thereby defer the delivery if it tries to use (for example) a
5372 cached ldap connection that the parent has called unbind on.
5374 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5375 of $address_data from the recipient verification was clobbered by the
5376 sender verification.
5378 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5379 was its contents. (It was OK if the option was not defined at all.)
5381 11. A "Completed" log line is now written for messages that are removed from
5382 the spool by the -Mrm option.
5384 12. $host_address is now set to the target address during the checking of
5385 ignore_target_hosts.
5387 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5388 being passed; this would have caused $sender_host_name to have been used if
5389 matching the list had actually called for a host name (not very likely,
5390 since this list is usually IP addresses). A host name is now passed as
5393 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5394 code that specifies a non-restarting handler (typically sigaction() in
5395 modern systems) in an attempt to fix a rare and obscure crash bug.
5397 15. Narrowed the window for a race in the daemon that could cause it to ignore
5398 SIGCHLD signals. This is not a major problem, because they are used only to
5399 wake it up if nothing else does.
5401 16. A malformed maildirsize file could cause Exim to calculate negative values
5402 for the mailbox size or file count. Odd effects could occur as a result.
5403 The maildirsize information is now recalculated if the size or filecount
5406 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5407 support for a long time. Removed HAVE_SYS_VFS_H.
5409 18. Updated exipick to current release from John Jetmore.
5411 19. Allow an empty sender to be matched against a lookup in an address list.
5412 Previously the only cases considered were a regular expression, or an
5415 20. Exim went into a mad DNS lookup loop when doing a callout where the
5416 host was specified on the transport, if the DNS lookup yielded more than
5419 21. The RFC2047 encoding function was originally intended for short strings
5420 such as real names; it was not keeping to the 75-character limit for
5421 encoded words that the RFC imposes. It now respects the limit, and
5422 generates multiple encoded words if necessary. To be on the safe side, I
5423 have increased the buffer size for the ${rfc2047: expansion operator from
5426 22. Failure to deliver a bounce message always caused it to be frozen, even if
5427 there was an errors_to setting on the router. The errors_to setting is now
5430 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5431 canonical form (fully expanded) before being placed in
5432 $sender_host_address.
5434 24. Updated eximstats to version 1.33
5436 25. Include certificate and key file names in error message when GnuTLS fails
5437 to set them up, because the GnuTLS error message doesn't include the name
5438 of the failing file when there is a problem reading it.
5440 26. Expand error message when OpenSSL has problems setting up cert/key files.
5443 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5444 (this can affect the format of dates).
5446 28. exim_tidydb, when checking for the continued existence of a message for
5447 which it has found a message-specific retry record, was not finding
5448 messages that were in split spool directories. Consequently, it was
5449 deleting retry records that should have stayed in existence.
5451 29. eximstats updated to version 1.35
5452 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5453 1.35 - bugfix such that pie charts by volume are generated correctly
5455 30. The SPA authentication driver was not abandoning authentication and moving
5456 on to the next authenticator when an expansion was forced to fail,
5457 contradicting the general specification for all authenticators. Instead it
5458 was generating a temporary error. It now behaves as specified.
5460 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5461 (the order specifies the preference for clients). The order is now AES256,
5462 AES128, 3DES, ARCFOUR128.
5464 31. Small patch to Sieve code - explicitly set From: when generating an
5467 32. Exim crashed if a remote delivery caused a very long error message to be
5468 recorded - for instance if somebody sent an entire SpamAssassin report back
5469 as a large number of 550 error lines. This bug was coincidentally fixed by
5470 increasing the size of one of Exim's internal buffers (big_buffer) that
5471 happened as part of the Exiscan merge. However, to be on the safe side, I
5472 have made the code more robust (and fixed the comments that describe what
5475 33. Some experimental protocols are using DNS PTR records for new purposes. The
5476 keys for these records are domain names, not reversed IP addresses. The
5477 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5478 leaves it alone. Component reversal etc. now happens only for IP addresses.
5481 34. The host_aton() function is supposed to be passed a string that is known
5482 to be a valid IP address. However, in the case of IPv6 addresses, it was
5483 not checking this. This is a hostage to fortune. Exim now panics and dies
5484 if the condition is not met. A case was found where this could be provoked
5485 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5486 components; fortuitously, this particular loophole had already been fixed
5487 by change 4.50/55 or 4.44/33 above.
5489 If there are any other similar loopholes, the new check in host_aton()
5490 itself should stop them being exploited. The report I received stated that
5491 data on the command line could provoke the exploit when Exim was running as
5492 exim, but did not say which command line option was involved. All I could
5493 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5494 running as the user.
5497 35. There was a buffer overflow vulnerability in the SPA authentication code
5498 (which came originally from the Samba project). I have added a test to the
5499 spa_base64_to_bits() function which I hope fixes it.
5502 36. The daemon start-up calls getloadavg() while still root for those OS that
5503 need the first call to be done as root, but it missed one case: when
5504 deliver_queue_load_max is set with deliver_drop_privilege. This is
5505 necessary for the benefit of the queue runner, because there is no re-exec
5506 when deliver_drop_privilege is set.
5508 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5509 was in use, was not putting the data itself into the right store pool;
5510 consequently, it could be overwritten for a subsequent message in the same
5511 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5514 38. Sometimes the final signoff response after QUIT could fail to get
5515 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5516 < 0 before doing a fflush(). This bug looks as though it goes back to the
5517 introduction of TLS in release 3.20, but "sometimes" must have been rare
5518 because the tests only now provoked it.
5524 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5525 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5526 Now it returns an integer. A number of calls were still expecting a T/F
5527 return. Fortuitously, in all cases, the tests worked in OK situations,
5528 which is the norm. However, things would have gone wrong on any write
5529 failures on the smtp file descriptor. This function is used when sending
5530 messages over SMTP and also when doing verify callouts.
5532 2. When Exim is called to do synchronous delivery of a locally submitted
5533 message (the -odf or -odi options), it no longer closes stderr before doing
5536 3. Implemented the mua_wrapper option.
5538 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5540 5. Implemented the functions header_remove(), header_testname(),
5541 header_add_at_position(), and receive_remove_recipient(), and exported them
5544 6. If an ACL "warn" statement specified the addition of headers, Exim already
5545 inserted X-ACL-Warn: at the start if there was no header name. However, it
5546 was not making this test for the second and subsequent header lines if
5547 there were newlines in the string. This meant that an invalid header could
5548 be inserted if Exim was badly configured.
5550 7. Allow an ACL "warn" statement to add header lines at the start or after all
5551 the Received: headers, as well as at the end.
5553 8. Added the rcpt_4xx retry error code.
5555 9. Added postmaster_mailfrom=xxx to callout verification option.
5557 10. Added mailfrom=xxxx to the callout verification option, for verify=
5560 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5561 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5563 12. Inserted some casts to stop certain compilers warning when using pointer
5564 differences as field lengths or precisions in printf-type calls (mostly
5565 affecting debugging statements).
5567 13. Added optional readline() support for -be (dynamically loaded).
5569 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5570 same clock tick as a message's arrival, so that its received time was the
5571 same as the "first fail" time on the retry record, and that message
5572 remained on the queue past the ultimate address timeout, every queue runner
5573 would try a delivery (because it was past the ultimate address timeout) but
5574 after another failure, the ultimate address timeout, which should have then
5575 bounced the address, did not kick in. This was a "< instead of <=" error;
5576 in most cases the first failure would have been in the next clock tick
5577 after the received time, and all would be well.
5579 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5580 being recognized when the domain list was tested by the match_domain
5581 condition in an expansion string.
5583 16. Added the ${str2b64: operator.
5585 17. Exim was always calling setrlimit() to set a large limit for the number of
5586 processes, without checking whether the existing limit was already
5587 adequate. (It did check for the limit on file descriptors.) Furthermore,
5588 errors from getrlimit() and setrlimit() were being ignored. Now they are
5589 logged to the main and panic logs, but Exim does carry on, to try to do its
5590 job under whatever limits there are.
5592 18. Imported PCRE 5.0.
5594 19. Trivial typo in log message " temporarily refused connection" (the leading
5597 20. If the log selector return_path_on_delivery was set and an address was
5598 redirected to /dev/null, the delivery process crashed because it assumed
5599 that a return path would always be set for a "successful" delivery. In this
5600 case, the whole delivery is bypassed as an optimization, and therefore no
5603 21. Internal re-arrangement: the function for sending a challenge and reading
5604 a response while authentication was assuming a zero-terminated challenge
5605 string. It's now changed to take a pointer and a length, to allow for
5606 binary data in such strings.
5608 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5610 23. Exim was not respecting finduser_retries when seeking the login of the
5611 uid under which it was called; it was always trying 10 times. (The default
5612 setting of finduser_retries is zero.) Also, it was sleeping after the final
5613 failure, which is pointless.
5615 24. Implemented tls_on_connect_ports.
5617 25. Implemented acl_smtp_predata.
5619 26. If the domain in control=submission is set empty, Exim assumes that the
5620 authenticated id is a complete email address when it generates From: or
5621 Sender: header lines.
5623 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5624 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5625 chown and chgrp in /bin and hostname in /usr/bin.
5627 28. Exim was keeping the "process log" file open after each use, just as it
5628 does for the main log. This opens the possibility of it remaining open for
5629 long periods when the USR1 signal hits a daemon. Occasional processlog
5630 errors were reported, that could have been caused by this. Anyway, it seems
5631 much more sensible not to leave this file open at all, so that is what now
5634 29. The long-running daemon process does not normally write to the log once it
5635 has entered its main loop, and it closes the log before doing so. This is
5636 so that log files can straightforwardly be renamed and moved. However,
5637 there are a couple of unusual error situations where the daemon does write
5638 log entries, and I had neglected to close the log afterwards.
5640 30. The text of an SMTP error response that was received during a remote
5641 delivery was being truncated at 512 bytes. This is too short for some of
5642 the long messages that one sometimes sees. I've increased the limit to
5645 31. It is now possible to make retry rules that apply only when a message has a
5646 specific sender, in particular, an empty sender.
5648 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5649 it possible to be selective about when SMTP synchronization is enforced.
5651 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5653 32. Implemented hosts_connection_nolog.
5655 33. Added an ACL for QUIT.
5657 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5660 35. Added mailbox_size and mailbox_filecount to appendfile.
5662 36. Added control = no_multiline_responses to ACLs.
5664 37. There was a bug in the logic of the code that waits for the clock to tick
5665 in the case where the clock went backwards by a substantial amount such
5666 that the microsecond fraction of "now" was more than the microsecond
5667 fraction of "then" (but the whole seconds number was less).
5669 38. Added support for the libradius Radius client library this is found on
5670 FreeBSD (previously only the radiusclient library was supported).
5676 1. When certain lookups returned multiple values in the form name=value, the
5677 quoting of the values was not always being done properly. Specifically:
5678 (a) If the value started with a double quote, but contained no whitespace,
5680 (b) If the value contained whitespace other than a space character (i.e.
5681 tabs or newlines or carriage returns) it was not quoted.
5682 This fix has been applied to the mysql and pgsql lookups by writing a
5683 separate quoting function and calling it from the lookup code. The fix
5684 should probably also be applied to nisplus, ibase and oracle lookups, but
5685 since I cannot test any of those, I have not disturbed their existing code.
5687 2. A hit in the callout cache for a specific address caused a log line with no
5688 reason for rejecting RCPT. Now it says "Previous (cached) callout
5689 verification failure".
5691 3. There was an off-by-one bug in the queryprogram router. An over-long
5692 return line was truncated at 256 instead of 255 characters, thereby
5693 overflowing its buffer with the terminating zero. As well as fixing this, I
5694 have increased the buffer size to 1024 (and made a note to document this).
5696 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5697 when Exim is waiting for an SMTP response from a remote server, Exim
5698 restarts its select() call on the socket, thereby resetting its timeout.
5699 This is not a problem when such interrupts are rare. Somebody set up a cron
5700 job to run exiwhat every 2 minutes, which is less than the normal select()
5701 timeout (5 or 10 minutes). This meant that the select() timeout never
5702 kicked in because it was always reset. I have fixed this by comparing the
5703 time when an interrupt arrives with the time at the start of the first call
5704 to select(). If more time than the timeout has elapsed, the interrupt is
5705 treated as a timeout.
5707 5. Some internal re-factoring in preparation for the addition of Sieve
5708 extensions (by MH). In particular, the "personal" test is moved to a
5709 separate function, and given an option for scanning Cc: and Bcc: (which is
5710 not set for Exim filters).
5712 6. When Exim created an email address using the login of the caller as the
5713 local part (e.g. when creating a From: or Sender: header line), it was not
5714 quoting the local part when it contained special characters such as @.
5716 7. Installed new OpenBSD configuration files.
5718 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5719 try to make them clearer.
5721 9. Callout options, other than the timeout value, were being ignored when
5722 verifying sender addresses in header lines. For example, when using
5724 verify = header_sender/callout=no_cache
5726 the cache was (incorrectly) being used.
5728 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5729 only the Cygwin environment.
5731 11. When return_path_on_delivery was set as a log selector, if different remote
5732 addresses in the same message used different return paths and parallel
5733 remote delivery occurred, the wrong values would sometimes be logged.
5734 (Whenever a remote delivery process finished, the return path value from
5735 the most recently started remote delivery process was logged.)
5737 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5738 lines when AUTH and/or TLS are in use. This is the "received protocol"
5739 field. Exim used to use "asmtp" for authenticated SMTP, without any
5740 indication (in the protocol name) for TLS use. Now it follows the RFC and
5741 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5742 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5743 names appear in log lines as well as in Received: header lines.
5745 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5746 extensions, and comparison tests, and to fix some bugs.
5748 14. Changes to the "personal" filter test:
5750 (1) The test was buggy in that it was just doing the equivalent of
5751 "contains" tests on header lines. For example, if a user's address was
5752 anne@some.where, the "personal" test would incorrectly be true for
5754 To: susanne@some.where
5756 This test is now done by extracting each address from the header in turn,
5757 and checking the entire address. Other tests that are part of "personal"
5758 are now done using regular expressions (for example, to check local parts
5759 of addresses in From: header lines).
5761 (2) The list of non-personal local parts in From: addresses has been
5762 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5763 taken from the Sieve specification recommendations.
5765 (3) If the message contains any header line starting with "List-" it is
5766 treated as non-personal.
5768 (4) The test for "circular" in the Subject: header line has been removed
5769 because it now seems ill-conceived.
5771 15. Minor typos in src/EDITME comments corrected.
5773 16. Installed latest exipick from John Jetmore.
5775 17. If headers_add on a router specified a text string that was too long for
5776 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5777 of string_sprintf() is now avoided.
5779 18. $message_body_size was not set (it was always zero) when running the DATA
5780 ACL and the local_scan() function.
5782 19. For the "mail" command in an Exim filter, no default was being set for
5783 the once_repeat time, causing a random time value to be used if "once" was
5784 specified. (If the value happened to be <= 0, no repeat happened.) The
5785 default is now 0s, meaning "never repeat". The "vacation" command was OK
5786 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5787 (I found it when inspecting the code).
5789 20. There is now an overall timeout for performing a callout verification. It
5790 defaults to 4 times the callout timeout, which applies to individual SMTP
5791 commands during the callout. The overall timeout applies when there is more
5792 than one host that can be tried. The timeout is checked before trying the
5793 next host. This prevents very long delays if there are a large number of
5794 hosts and all are timing out (e.g. when the network connections are timing
5795 out). The value of the overall timeout can be changed by specifying an
5796 additional sub-option for "callout", called "maxwait". For example:
5798 verify = sender/callout=5s,maxwait=20s
5800 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5801 to the end before writing, but this should make it even safer).
5803 22. Exim was forgetting that it had advertised PIPELINING for the second and
5804 subsequent messages on an SMTP connection. It was also not resetting its
5805 memory on STARTTLS and an internal HELO.
5807 23. When Exim logs an SMTP synchronization error within a session, it now
5808 records whether PIPELINING has been advertised or not.
5810 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5811 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5812 rather than long int.
5814 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5816 26. Added the never_mail option to autoreply.
5822 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5823 crash if the getsockname() call failed; this can happen if a connection is
5824 closed very soon after it is established. The problem was simply in the
5825 order in which certain operations were done, causing Exim to try to write
5826 to the SMTP stream before it had set up the file descriptor. The bug has
5827 been fixed by making things happen in the correct order.
5833 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5834 before the connection was closed, thus losing the rejection response.
5836 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5837 some early Solaris releases, but causes trouble in current releases where
5838 socklen_t is defined.
5840 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5843 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5846 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5847 that releasing the top of it at the end releases what was used for sub-
5848 expansions (unless the block got too big). However, discard this block if
5849 the first thing is a variable or header, so that we can use its block when
5850 it is dynamic (useful for very large $message_headers, for example).
5852 6. Lookups now cache *every* query, not just the most recent. A new, separate
5853 store pool is used for this. It can be recovered when all lookup caches are
5854 flushed. Lookups now release memory at the end of their result strings.
5855 This has involved some general refactoring of the lookup sources.
5857 7. Some code has been added to the store_xxx() functions to reduce the amount
5858 of flapping under certain conditions.
5860 8. log_incoming_interface used to affect only the <= reception log lines. Now
5861 it causes the local interface and port to be added to several more SMTP log
5862 lines, for example "SMTP connection from", and rejection lines.
5864 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5866 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5868 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5869 could be overwritten at the end of the current message (or the start of a
5870 new message if it was set in a HELO ACL). The value is now preserved for
5871 the duration of the SMTP connection.
5873 12. If a transport had a headers_rewrite setting, and a matching header line
5874 contained an unqualified address, that address was qualified, even if it
5875 did not match any rewriting rules. The underlying bug was that the values
5876 of the flags that permit the existence of unqualified sender and recipient
5877 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5878 non-local messages, and by -bnq for local messages) were not being
5879 preserved with the message after it was received.
5881 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5882 "next input=" as part of the text comprising the host identity instead of
5883 the correct text. The code was using the same buffer for two different
5884 strings. However, depending on which order the printing function evaluated
5885 its arguments, the bug did not always show up. Under Linux, for example, my
5886 test suite worked just fine.
5888 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5889 doesn't work with some older versions of Perl. It has been changed to "my",
5890 which in any case is probably the better facility to use.
5892 15. A really picky compiler found some instances of statements for creating
5893 error messages that either had too many or two few arguments for the format
5896 16. The size of the buffer for calls to the DNS resolver has been increased
5897 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5898 for addresses that have a lot of PTR records. This alleviates a problem; it
5899 does not fully solve it.
5901 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5902 buffer now truncates the list and logs the incident, which is the same
5903 action as happens when Exim is looking up a host name and its aliases.
5904 Previously in this situation something unpredictable would happen;
5905 sometimes it was "internal error: store_reset failed".
5907 18. If a server dropped the connection unexpectedly when an Exim client was
5908 using GnuTLS and trying to read a response, the client delivery process
5909 crashed while trying to generate an error log message.
5911 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5912 string, for example:
5914 warn message = H1: something\nH2: something
5916 the text was added as a single header line from Exim's point of view
5917 though it ended up OK in the delivered message. However, searching for the
5918 second and subsequent header lines using $h_h2: did not work. This has been
5919 fixed. Similarly, if a system filter added multiple headers in this way,
5920 the routers could not see them.
5922 20. Expanded the error message when iplsearch is called with an invalid key to
5923 suggest using net-iplsearch in a host list.
5925 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5926 ACLs are no longer actually imposed (and a message to that effect is
5929 22. If a "gecos" field in a passwd entry contained escaped characters, in
5930 particular, if it contained a \" sequence, Exim got it wrong when building
5931 a From: or a Sender: header from that name. A second bug also caused
5932 incorrect handling when an unquoted " was present following a character
5933 that needed quoting.
5935 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5936 was not being matched caselessly.
5938 24. Arranged for all hyphens in the exim.8 source to be escaped with
5941 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5942 properly. Recipient callout cache records were still being keyed to include
5943 the sender, even when use_sender was set false. This led to far more
5944 callouts that were necessary. The sender is no longer included in the key
5945 when use_sender is false.
5947 26. Added "control = submission" modifier to ACLs.
5949 27. Added the ${base62d: operator to decode base 62 numbers.
5951 28. dnsdb lookups can now access SRV records.
5953 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5954 the configuration file.
5956 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5957 (-v) mode. This makes the output for a verbose queue run more intelligible.
5959 31. Added a use_postmaster feature to recipient callouts.
5961 32. Added the $body_zerocount variable, containing the number of binary zero
5962 bytes in the message body.
5964 33. The time of last modification of the "new" subdirectory is now used as the
5965 "mailbox time last read" when there is a quota error for a maildir
5968 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5970 35. Added +ignore_unknown as a special item in host lists.
5972 36. Code for decoding IPv6 addresses in host lists is now included, even if
5973 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5974 address was recognized as an IP address, but was then not correctly decoded
5975 into binary, causing unexpected and incorrect effects when compared with
5982 1. Very minor rewording of debugging text in manualroute to say "list of
5983 hosts" instead of "hostlist".
5985 2. If verify=header_syntax was set, and a header line with an unqualified
5986 address (no domain) and a large number of spaces between the end of the
5987 name and the colon was received, the reception process suffered a buffer
5988 overflow, and (when I tested it) crashed. This was caused by some obsolete
5989 code that should have been removed. The fix is to remove it!
5991 3. When running in the test harness, delay a bit after writing a bounce
5992 message to get a bit more predictability in the log output.
5994 4. Added a call to search_tidyup() just before forking a reception process. In
5995 theory, someone could use a lookup in the expansion of smtp_accept_max_
5996 per_host which, without the tidyup, could leave open a database connection.
5998 5. Added the variables $recipient_data and $sender_data which get set from a
5999 lookup success in an ACL "recipients" or "senders" condition, or a router
6000 "senders" option, similar to $domain_data and $local_part_data.
6002 6. Moved the writing of debug_print from before to after the "senders" test
6005 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6006 problems for message scanning, either using a data ACL, or using
6007 local_scan() because the Received: header was not generated till after they
6008 were called (in order to set the time as the time of reception completion).
6009 I have revised the way this works. The header is now generated after the
6010 body is received, but before the ACL or local_scan() are called. After they
6011 are run, the timestamp in the header is updated.
6017 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6018 before starting a queue runner without re-exec. This happened only when
6019 deliver_drop_privilege was set or when the Exim user was set to root. The
6020 effect of the bug was that timeouts during subsequent deliveries caused
6021 crashes instead of being properly handled. The handler is now left at its
6022 default (and expected) setting.
6024 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6025 message, again when deliver_drop_privilege is set or Exim is run as root.
6026 The bug described in (1) was not present in this case, but the tidying up
6027 of the other signals was missing. I have made the two cases consistent.
6029 3. The ignore_target_hosts setting on a manualroute router was being ignored
6030 for hosts that were looked up using the /MX notation.
6032 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6035 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6036 operated on the sender address. After changing the $sender_address to <>
6037 for the sender address verify, Exim was re-instated it as the original
6038 (before rewriting) address, but remembering that it had rewritten it, so it
6039 wasn't rewriting it again. This bug also had the effect of breaking the
6040 sender address verification caching when the sender address was rewritten.
6042 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6043 This has been changed so that if the ip literal address matches
6044 ignore_target_hosts, the router declines.
6046 7. Added expansion conditions match_domain, match_address, and match_local_
6047 part (NOT match_host).
6049 8. The placeholder for the Received: header didn't have a length field set.
6051 9. Added code to Exim itself and to exim_lock to test for a specific race
6052 condition that could lead to file corruption when using MBX delivery. The
6053 issue is with the lockfile that is created in /tmp. If this file is removed
6054 after a process has opened it but before that process has acquired a lock,
6055 there is the potential for a second process to recreate the file and also
6056 acquire a lock. This could lead to two Exim processes writing to the file
6057 at the same time. The added code performs the same test as UW imapd; it
6058 checks after acquiring the lock that its file descriptor still refers to
6059 the same named file.
6061 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6062 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6065 11. Added the smtp_active_hostname option. If used, this will typically be made
6066 to depend on the incoming interface address. Because $interface_address is
6067 not set up until the daemon has forked a reception process, error responses
6068 that can happen earlier (such as "too many connections") no longer contain
6071 12. If an expansion in a condition on a "warn" statement fails because a lookup
6072 defers, the "warn" statement is abandoned, and the next ACL statement is
6073 processed. Previously this caused the whole ACL to be aborted.
6075 13. Added the iplsearch lookup type.
6077 14. Added ident_timeout as a log selector.
6079 15. Added tls_certificate_verified as a log selector.
6081 16. Added a global option tls_require_ciphers (compare the smtp transport
6082 option of the same name). This controls incoming TLS connections.
6084 17. I finally figured out how to make tls_require_ciphers do a similar thing
6085 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6086 before starting the TLS session.
6088 18. Tabs are now shown as \t in -bP output.
6090 19. If the log selector return_path_on_delivery was set, Exim crashed when
6091 bouncing a message because it had too many Received: header lines.
6093 20. If two routers both had headers_remove settings, and the first one included
6094 a superfluous trailing colon, the final name in the first list and the
6095 first name in the second list were incorrectly joined into one item (with a
6096 colon in the middle).
6102 1. Added -C and -D options to the exinext utility, mainly to make it easier
6103 to include in the automated testing, but these could be helpful when
6104 multiple configurations are in use.
6106 2. The exinext utility was not formatting the output nicely when there was
6107 an alternate port involved in the retry record key, nor when there was a
6108 message id as well (for retries that were specific to a specific message
6109 and a specific host). It was also confused by IPv6 addresses, because of
6110 the additional colons they contain. I have fixed the IPv4 problem, and
6111 patched it up to do a reasonable job for IPv6.
6113 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6114 delivery, the log line now contains "pipelined" if PIPELINING was used.
6116 4. An SMTP transport process used to panic and die if the bind() call to set
6117 an explicit outgoing interface failed. This has been changed; it is now
6118 treated in the same way as a connect() failure.
6120 5. A reference to $sender_host_name in the part of a conditional expansion
6121 that was being skipped was still causing a DNS lookup. This no longer
6124 6. The def: expansion condition was not recognizing references to header lines
6125 that used bh_ and bheader_.
6127 7. Added the _cache feature to named lists.
6129 8. The code for checking quota_filecount in the appendfile transport was
6130 allowing one more file than it should have been.
6132 9. For compatibility with Sendmail, the command line option
6140 and sets the incoming protocol and host name (for trusted callers). The
6141 host name and its colon can be omitted when only the protocol is to be set.
6142 Note the Exim already has two private options, -pd and -ps, that refer to
6143 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6144 "s", but I don't think that's a major issue.
6146 10. A number of refactoring changes to the code, none of which should affect
6149 (a) The number of logging options was getting close to filling up the
6150 32-bit word that was used as a bit map. I have split them into two classes:
6151 those that are passed in the argument to log_write(), and those that are
6152 only ever tested independently outside of that function. These are now in
6153 separate 32-bit words, so there is plenty of room for expansion again.
6154 There is no change in the user interface or the logging behaviour.
6156 (b) When building, for example, log lines, the code previously used a
6157 macro that called string_cat() twice, in order to add two strings. This is
6158 not really sufficiently general. Furthermore, there was one instance where
6159 it was actually wrong because one of the argument was used twice, and in
6160 one call a function was used. (As it happened, calling the function twice
6161 did not affect the overall behaviour.) The macro has been replaced by a
6162 function that can join an arbitrary number of extra strings onto a growing
6165 (c) The code for expansion conditions now uses a table and a binary chop
6166 instead of a serial search (which was left over from when there were very
6167 few conditions). Also, it now recognizes conditions like "pam" even when
6168 the relevant support is not compiled in: a suitably worded error message is
6169 given if an attempt is made to use such a condition.
6171 11. Added ${time_interval:xxxxx}.
6173 12. A bug was causing one of the ddress fields not to be passed back correctly
6174 from remote delivery subprocesses. The field in question was not being
6175 subsequently used, so this caused to problems in practice.
6177 13. Added new log selectors queue_time and deliver_time.
6179 14. Might have fixed a bug in maildirsizefile handling that threw up
6180 "unexpected character" debug warnings, and recalculated the data
6181 unnecessarily. In any case, I expanded the warning message to give more
6184 15. Added the message "Restricted characters in address" to the statements in
6185 the default ACL that block characters like @ and % in local parts.
6187 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6188 Three changes have been made:
6190 (a) There was a serious bug; a negative response to MAIL caused the whole
6191 recipient domain to be cached as invalid, thereby blocking all messages
6192 to all local parts at the same domain, from all senders. This bug has
6193 been fixed. The domain is no longer cached after a negative response to
6194 MAIL if the sender used is not empty.
6196 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6199 (c) A new callout option, "use_sender" has been added for people who want
6200 the modified behaviour.
6206 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6209 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6210 indeed breaks things for older releases.
6212 3. Added additional logging to the case where there is a problem reading data
6213 from a filter that is running in a subprocess using a pipe, in order to
6214 try to track down a specific problem.
6216 4. Testing facility fudge: when running in the test harness and attempting
6217 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6218 getting "No route to host". Convert this to a timeout.
6220 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6223 6. Some OS don't have socklen_t but use size_t instead. This affects the
6224 fifth argument of getsockopt() amongst other things. This is now
6225 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6226 can be set for individual OS. I have set it for SunOS5, OSF1, and
6227 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6228 some earlier ones do not.
6230 7. Change 4.30/15 was not doing the test caselessly.
6232 8. The standard form for an IPv6 address literal was being rejected by address
6233 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6234 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6235 this, as well as the form without the "IPv6" on the front (but only when
6236 address literals are enabled, of course).
6238 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6240 10. Exim crashed if a message with an empty sender address specified by -f
6241 encountered a router with an errors_to setting. This could be provoked only
6242 by a command such as
6246 where an empty string was supplied; "<>" did not hit this bug.
6248 11. Installed PCRE release 4.5.
6250 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6251 remained set. It is now erased.
6253 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6254 times from message ids (which are base 36 rather than the normal 62).
6256 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6257 were being counted as actual protocol errors, and logged if the log
6258 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6259 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6260 and DATA following a set of rejected RCPTs do not count as protocol errors.
6261 In other words, Exim assumes they were pipelined, though this may not
6262 actually be the case. Of course, in all cases the client gets an
6263 appropriate error code.
6265 15. If a lookup fails in an ACL condition, a message about the failure may
6266 be available; it is used if testing the ACL cannot continue, because most
6267 such messages specify what the cause of the deferral is. However, some
6268 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6269 that caused an old message to be retained and used if a later statement
6270 caused a defer, replacing the real cause of the deferral.
6272 16. If an IP address had so many PTR records that the DNS lookup buffer
6273 was not large enough to hold them, Exim could crash while trying to process
6274 the truncated data. It now detects and logs this case.
6276 17. Further to 4.21/58, another change has been made: if (and only if) the
6277 first line of a message (the first header line) ends with CRLF, a bare LF
6278 in a subsequent header line has a space inserted after it, so as not to
6279 terminate the header.
6281 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6282 unnecessarily, used atoi() instead of strtol(), and didn't check the
6283 termination when getting file sizes from file names by regex.
6285 19. Completely re-implemented the support for maildirsize files, in the light
6286 of a number of problems with the previous contributed implementation
6287 (4.30/29). In particular:
6289 . If the quota is zero, the maildirsize file is maintained, but no quota is
6292 . If the maildir directory does not exist, it is created before any attempt
6293 to write a maildirsize file.
6295 . The quota value in the file is just a cache; if the quota is changed in
6296 the transport, the new value overrides.
6298 . A regular expression is available for excluding directories from the
6301 20. The autoreply transport checks the characters in options that define the
6302 message's headers; it allows continued headers, but it was checking with
6303 isspace() after an embedded newline instead of explicitly looking for a
6306 21. If all the "regular" hosts to which an address was routed had passed their
6307 expiry times, and had not reached their retry times, the address was
6308 bounced, even if fallback hosts were defined. Now Exim should go on to try
6311 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6312 equivalent code in the SMTP transport. Some hosts send humungous responses
6313 to HELO/EHLO, more than 1024 it seems.
6315 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6316 gives compiler warnings in some environments. I've now done it "properly",
6319 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6320 (because of problems with the built-in one) was declared to return uschar *
6321 instead of char *, causing compiler failure.
6323 25. Fixed a file descriptor leak when processing alias/forward files.
6325 26. Fixed a minor format string issue in dbfn.c.
6327 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6329 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6330 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6333 29. When a sender address is verified, it is cached, to save repeating the test
6334 when there is more than one recipient in a message. However, when the
6335 verification involves a callout, it is possible for different callout
6336 options to be set for different recipients. It is too complicated to keep
6337 track of this in the cache, so now Exim always runs a verification when a
6338 callout is required, relying on the callout cache for the optimization.
6339 The overhead is duplication of the address routing, but this should not be
6342 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6343 to be verified with callout=postmaster, and the main callout worked but the
6344 postmaster check failed, the verification correctly failed. However, if a
6345 subsequent RCPT command asked for sender verification *without* the
6346 postmaster check, incorrect caching caused this verification also to fail,
6349 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6350 it was not caching the DNS options (qualify_single, search_parents) that
6351 were used when the lookup failed. A subsequent lookup with different
6352 options therefore always gave the same answer, though there were cases
6353 where it should not have. (Example: a "domains = !$mx_any" option on a
6354 dnslookup router: the "domains" option is always processed without any
6355 widening, but the router might have qualify_single set.) Now Exim uses the
6356 cached value only when the same options are set.
6358 32. Added John Jetmore's "exipick" utility to the distribution.
6360 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6361 than a timeout (e.g. a certificate is required, and is not provided), an
6362 Exim server now closes the connection immediately. Previously it waited for
6363 the client to close - but if the client is SSL, it seems that they each
6364 wait for each other, leading to a delay before one of them times out.
6366 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6367 maintained 0.8.x compatibility because I don't think many are using it, and
6368 it is clearly obsolete.
6370 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6373 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6374 client certificate was expired. A simple patch fixes this, though I don't
6375 understand the full logic of why the verify callback is called multiple
6378 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6379 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6380 which causes problems with some clients (such as the Certicom SSL Plus
6381 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6382 disables the coutermeasure allowing Eudora to connect."
6384 38. Exim was not checking that a write() to a log file succeeded. This could
6385 lead to Bad Things if a log got too big, in particular if it hit a file
6386 size limit. Exim now panics and dies if it cannot write to a log file, just
6387 as it does if it cannot open a log file.
6389 39. Modified OS/Makefile-Linux so that it now contains
6391 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6393 The two -D definitions ensure that Exim is compiled with large file
6394 support, which makes it possible to handle log files that are bigger than
6397 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6398 instance) a domain was checked against a named list that involved a lookup,
6399 causing $domain_data to be set, then another domain was checked against the
6400 same list, then the first domain was re-checked, the value of $domain_data
6401 after the final check could be wrong. In particular, if the second check
6402 failed, it could be set empty. This bug probably also applied to
6405 41. The strip_trailing_dot option was not being applied to the address given
6406 with the -f command-line option.
6408 42. The code for reading a message's header from the spool was incrementing
6409 $received_count, but never initializing it. This meant that the value was
6410 incorrect (doubled) while delivering a message in the same process in which
6411 it was received. In the most common configuration of Exim, this never
6412 happens - a fresh exec is done - but it can happen when
6413 deliver_drop_privilege is set.
6415 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6416 it now includes up to 150 characters of the unexpected data in the log
6419 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6420 and building data strings. The size of both of these buffers was 10 000
6421 bytes - far larger than anybody would *ever* want, thought I. Needless to
6422 say, somebody hit the limit. I have increased the maximum line length to
6423 20 000 and the maximum data length of concatenated lines to 100 000. I have
6424 also fixed two bugs, because there was no checking on these buffers. Tsk,
6425 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6426 buffer is too small.
6428 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6429 lsearch lookups. Now it does.
6431 46. When parsing a route_list item in a manualroute router, a fixed-length
6432 buffer was used for the list of hosts. I made this 1024 bytes long,
6433 thinking that nobody would ever have a list of hosts that long. Wrong.
6434 Somebody had a whole pile of complicated expansion conditions, and the
6435 string was silently truncated, leading to an expansion error. It turns out
6436 that it is easier to change to an unlimited length (owing to other changes
6437 that have happened since this code was originally written) than to build
6438 structure for giving a limitation error. The length of the item that
6439 expands into the list of hosts is now unlimited.
6441 47. The lsearch lookup could not handle data where the length of text line was
6442 more than 4095 characters. Such lines were truncated, leading to shortened
6443 data being returned. It should now handle lines of any length.
6445 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6446 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6449 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6450 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6451 no longer happens in comment lines. A list of replacements is now placed
6452 at the head of all of the source files, except those whose only change is
6453 to replace PERL_COMMAND in the very first #! line.
6455 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6456 messages on the queue, with a bottom-up merge sort, using code contributed
6457 by Michael Haardt. This should make operations like -bp somewhat faster on
6458 large queues. It won't affect queue runners, except when queue_run_in_order
6461 51. Installed eximstats 1.31 in the distribution.
6463 52. Added support for SRV lookups to the dnslookup router.
6465 53. If an ACL referred to $message_body or $message_body_end, the value was not
6466 reset for any messages that followed in the same SMTP session.
6468 54. The store-handling optimization for building very long strings was not
6469 differentiating between the different store pools. I don't think this
6470 actually made any difference in practice, but I've tidied it.
6472 55. While running the routers to verify a sender address, $sender_address
6473 was still set to the sender address. This is wrong, because when routing to
6474 send a bounce to the sender, it would be empty. Therefore, I have changed
6475 it so that, while verifying a sender address, $sender_address is set to <>.
6476 (There is no change to what happens when verifying a recipient address.)
6478 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6479 target A or AAAA records (if not already returned) without resetting the
6480 qualify_single or search_parents options of the DNS resolver. These are
6481 inappropriate in this case because the targets of MX and SRV records must
6482 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6483 target that, when qualified, matched something in the local domain. These
6484 two options are now turned off when doing these lookups.
6486 57. It seems that at least some releases of Reiserfs (which does not have the
6487 concept of a fixed number of inodes) returns zero and not -1 for the
6488 number of available inodes. This interacted badly with check_spool_inodes,
6489 which assumed that -1 was the "no such thing" setting. What I have done is
6490 to check that the total number of inodes is greater than zero before doing
6491 the test of how many are available.
6493 58. When a "warn" ACL statement has a log_message modifier, the message is
6494 remembered, and not repeated. This is to avoid a lot of repetition when a
6495 message has many recipients that cause the same warning to be written.
6496 However, Exim was preserving the list of already written lines for an
6497 entire SMTP session, which doesn't seem right. The memory is now reset if a
6498 new message is started.
6500 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6501 debugging output unless log_rewrite was also set.
6503 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6504 of (int)(handle) when we know that handle contains (void *)(-1).
6506 61. The Exim daemon panic-logs an error return when it closes the incoming
6507 connection. However "connection reset by peer" seems to be common, and
6508 isn't really an error worthy of noting specially, so that particular error
6511 62. When Exim is trying to find all the local interfaces, it used to panic and
6512 die if the ioctl to get the interface flags failed. However, it seems that
6513 on at least one OS (Solaris 9) it is possible to have an interface that is
6514 included in the list of interfaces, but for which you get a failure error
6515 for this call. This happens when the interface is not "plumbed" into a
6516 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6517 failure of the "get flags" call assumes that the interface is down.
6519 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6520 makes life easier for people who are doing arithmetic on fields extracted
6521 from dates, where you often get leading zeros that should not be
6522 interpreted as octal.
6524 64. Added qualify_domain to the redirect router, to override the global
6527 65. If a pathologically long header line contained very many addresses (the
6528 report of this problem mentioned 10 000) and each of them was rewritten,
6529 Exim could use up a very large amount of memory. (It kept on making new
6530 copies of the header line as it rewrote, and never released the old ones.)
6531 At the expense of a bit more processing, the header rewriting function has
6532 been changed so that it no longer eats memory in this way.
6534 66. The generation of the Received: header has been moved from the time that a
6535 message starts to be received, to the time that it finishes. The timestamp
6536 in the Received: header should now be very close to that of the <= log
6537 line. There are two side-effects of this change:
6539 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6540 logged header lines no longer include the local Received: line, because
6541 it has not yet been created. The same applies to a copy of the message
6542 that is returned to a non-SMTP sender when a message is rejected.
6544 (b) When a filter file is tested using -bf, no additional Received: header
6545 is added to the test message. After some thought, I decided that this
6548 This change does not affect the value of $received_for. It is still set
6549 after address rewriting, but before local_scan() is called.
6551 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6553 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6554 gave an unhelpful panic error message, and a defer error. I have managed to
6555 change this behaviour so that it now rejects any supplied certificate,
6556 which seems right, as the list of acceptable certificates is empty.
6558 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6559 gave an unhelpful defer error. I have not managed to make this reject any
6560 supplied certificates, but the error message it gives is "no certificate
6561 supplied", which is not helpful.
6563 70. exigrep's output now also includes lines that are not associated with any
6564 message, but which match the given pattern. Implemented by a patch from
6565 Martin Sluka, which also tidied up the Perl a bit.
6567 71. Recipient callout verification, like sender verification, was using <> in
6568 the MAIL FROM command. This isn't really the right thing, since the actual
6569 sender may affect whether the remote host accepts the recipient or not. I
6570 have changed it to use the actual sender in the callout; this means that
6571 the cache record is now keyed on a recipient/sender pair, not just the
6572 recipient address. There doesn't seem to be a real danger of callout loops,
6573 since a callout by the remote host to check the sender would use <>.
6574 [SEE ABOVE: changed after hitting problems.]
6576 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6577 temporary errors. However, in the case of such a code being given after
6578 the end of a data transmission (i.e. after ".") Exim was failing to write
6579 a retry record for the message. (Yes, there was some broken host that was
6580 actually sending 8xx at this point.)
6582 73. An unknown lookup type in a host list could cause Exim to panic-die when
6583 the list was checked. (An example that provoked this was putting <; in the
6584 middle of a list instead of at the start.) If this happened during a DATA
6585 ACL check, a -D file could be left lying around. This kind of configuration
6586 error no longer causes Exim to die; instead it causes a defer error. The
6587 incident is still logged to the main and panic logs.
6589 74. Buglet left over from Exim 3 conversion. The message "too many messages
6590 in one connection" was written to the rejectlog but not the mainlog, except
6591 when address rewriting (yes!) was being logged.
6593 75. Added write_rejectlog option.
6595 76. When a system filter was run not as root (that is, when system_filter_user
6596 was set), the values of the $n variables were not being returned to the
6597 main process; thus, they were not subsequently available in the $sn
6600 77. Added +return_path_on_delivery log selector.
6602 78. A connection timeout was being treated differently from recipients deferred
6603 when testing hosts_max_try with a message that was older than the host's
6604 retry timeout. (The host should not be counted, thus allowing all hosts to
6605 be tried at least once before bouncing.) This may have been the cause of an
6606 occasionally reported bug whereby a message would remain on the queue
6607 longer than the retry timeout, but would be bounced if a delivery was
6608 forced. I say "may" because I never totally pinned down the problem;
6609 setting up timeout/retry tests is difficult. See also the next item.
6611 79. The ultimate address timeout was not being applied to errors that involved
6612 a combination of host plus message (for example, a timeout on a MAIL
6613 command). When an address resolved to a number of possible hosts, and they
6614 were not all tried for each delivery (e.g. because of hosts_max_try), a
6615 message could remain on the queue longer than the retry timeout.
6617 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6620 81. Fixed an obscure SMTP outgoing bug which required at least the following
6621 conditions: (a) there was another message waiting for the same server;
6622 (b) the server returned 5xx to all RCPT commands in the first message so
6623 that the message was not completed; (c) the server dropped the connection
6624 or gave a negative response to the RSET that Exim sends to abort the
6625 transaction. The observed case was a dropped connection after DATA that had
6626 been sent in pipelining mode. That is, the server had advertised PIPELINING
6627 but was not implementing it correctly. The effect of the bug was incorrect
6628 behaviour, such as trying another host, and this could lead to a crash.
6634 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6635 and daemon.c were passed as pointers to ints; they should have been
6636 pointers to socklen_t variables (which are typically unsigned ints).
6638 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6641 3. Fixed a really odd bug that affected only the testing scheme; patching a
6642 certain fixed string in the binary changed the value of another string that
6643 happened to be identical to the end of the original first string.
6645 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6646 name", it returns that address as the IP address. On some operating
6647 systems (e.g. Solaris), it also passes back the IP address string as the
6648 "host name". However, on others (e.g. Linux), it passes back an empty
6649 string. Exim wasn't checking for this, and was changing the host name to an
6650 empty string, assuming it had been canonicalized.
6652 5. Although rare, it is permitted to have more than one PTR record for a given
6653 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6654 all the names associated with an address, because they do in Solaris.
6655 However, it seems that they do not in Linux for data that comes from the
6656 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6657 I found this out when I moved to a new Linux workstation and tried to run
6658 the Exim test suite.
6660 To get round this problem I have changed the code so that it now does its
6661 own call to the DNS to look up PTR records when searching for a host name.
6662 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6663 addresses that are only in /etc/hosts are still found.
6665 This behaviour is, however, controlled by an option called host_lookup_
6666 order, which defaults to "bydns:byaddr". If people want to use the other
6667 order, or indeed, just use one or the other means of lookup, they can
6668 specify it in this variable.
6670 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6671 some operating systems, this comes back from gethostbyaddr() as an empty
6672 string, and this is what Exim used to test for. However, it seems that in
6673 other systems, "." is yielded. Exim now tests for this case too.
6675 7. The values of check_spool_space and check_log_space are now held internally
6676 as a number of kilobytes instead of an absolute number of bytes. If a
6677 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6678 kilobyte. This means that much larger values can be stored.
6680 8. Exim monitor: an attempt to get the action menu when not actually pointing
6681 at a message produces an empty menu entitled "No message selected". This
6682 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6683 no entries in it ("Shell widget menu has zero width and/or height"). So I
6684 have added a single, blank menu entry in this case.
6686 9. Added ${quote_local_part.
6688 10. MIME decoding is now applied to the contents of Subject: header lines when
6691 11. Now that a reference to $sender_host_address automatically causes a reverse
6692 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6693 host lookup before query-style lookups in lists that might use this
6694 variable. This has therefore been abolished, and the "net-" prefix is no
6695 longer necessary for query-style lookups.
6697 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6698 have been a typo for LFLAGS, so it has been changed.
6700 13. The install script calls Exim with "-C /dev/null" in order to find the
6701 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6702 to be output. However, since Exim outputs its version number before the
6703 error, it didn't break the script. It just looked ugly. I fixed this by
6704 always allowing "-C /dev/null" if the caller is root.
6706 14. Ignore overlarge ACL variable number when reading spool file - insurance
6707 against a later release with more variables having written the file.
6709 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6710 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6711 this, as well as the form without the "IPv6" on the front.
6713 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6714 OS/Makefile-Darwin file.
6716 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6717 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6719 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6720 variable. However, some OS use ints for inodes. I've added cast to long int
6721 to get rid of the compiler warning.
6723 19. I had forgotten to lock out "/../" in configuration file names when
6724 ALT_CONFIG_PREFIX was set.
6726 20. Routers used for verification do not need to specify transports. However,
6727 if such a router generated a host list, and callout was configured, Exim
6728 crashed, because it could not find a port number from the (non-existent)
6729 transport. It now assumes port 25 in this circumstance.
6731 21. Added the -t option to exigrep.
6733 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6734 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6735 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6736 them is set, LOOKUP_LSEARCH is forced.
6738 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6740 24. Added sender and host information to the "rejected by local_scan()" log
6741 line; previously there was no indication of these.
6743 25. Added .include_if_exists.
6745 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6746 Linux. It turns out that not all file systems support this. Apparently some
6747 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6748 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6749 not supported on the file descriptor, is now ignored when Exim is trying to
6750 sync a directory. This applies only to Linux.
6752 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6754 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6755 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6758 29. Added support for maildirsize files from supplied patch (modified a bit).
6760 30. The use of :fail: followed by an empty string could lead Exim to respond to
6761 sender verification failures with (e.g.):
6763 550 Verification failed for <xxx>
6764 550 Sender verify failed
6766 where the first response line was missing the '-' that indicates it is not
6767 the final line of the response.
6769 31. The loop for finding the name of the user that called Exim had a hardwired
6770 limit of 10; it now uses the value of finduser_retries, which is used for
6771 all other user lookups.
6773 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6776 33. Exim was neglecting to zero errno before one call of strtol() when
6777 expanding a string and expecting an integer value. On some systems this
6778 resulted in spurious "integer overflow" errors. Also, it was casting the
6779 result into an int without checking.
6781 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6782 did not work. The code looks as if it has *never* worked, though it appears
6783 to have been documented since at least release 1.62. I have made it work.
6785 35. The "timeout_DNS" error in retry rules, also documented since at least
6786 1.62, also never worked. As it isn't clear exactly what this means, and
6787 clearly it isn't a major issue, I have abolished the feature by treating it
6788 as "timeout", and writing a warning to the main and panic logs.
6790 36. The display of retry rules for -brt wasn't always showing the error code
6793 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6794 timeout_connect_A, timeout_connect_MX.
6796 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6797 to the empty sender.
6799 39. The daemon was not analysing the content of -oX till after it had closed
6800 stderr and disconnected from the controlling terminal. This meant that any
6801 syntax errors were only noted on the panic log, and the return code from
6802 the command was 0. By re-arranging the code a little, I've made the
6803 decoding happen first, so such errors now appear on stderr, and the return
6804 code is 1. However, the actual setting up of the sockets still happens in
6805 the disconnected process, so errors there are still only recorded on the
6808 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6809 connections (as happens on some IP stacks) was logged at start up time as
6810 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6811 it from "IPv6 and IPv4", which means that two separate sockets are being
6814 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6815 says whether AF_INET or AF_INET6 was passed as an argument.
6817 42. Exiwhat output was messed up when time zones were included in log
6820 43. Exiwhat now gives more information about the daemon's listening ports,
6821 and whether -tls-on-connect was used.
6823 44. The "port" option of the smtp transport is now expanded.
6825 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6826 silently ignored. Now an error message is written to the main and panic
6829 46. There's a new ACL modifier called "logwrite" which writes to a log file
6830 as soon as it is encountered.
6832 47. Added $local_user_uid and $local_user_gid at routing time.
6834 48. Exim crashed when trying to verify a sender address that was being
6837 49. Exim was recognizing only a space character after ".include". It now also
6838 recognizes a tab character.
6840 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6841 extracting the relevant information from the specification. The man page no
6842 longer contains scrambled data for the -d option, and I've added a section
6843 at the front about calling Exim under different names.
6845 51. Added "extra_headers" argument to the "mail" command in filter files.
6847 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6850 53. Installed eximstats 1.29.
6852 54. Added transport_filter_timeout as a generic transport option.
6854 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6855 Cc: header lines. This was required by RFC 822, but it not required by RFC
6858 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6859 incoming messages that did not have them. Now it does so only if the
6860 message originates locally, that is, if there is no associated remote host
6861 address. When Resent- header lines are present, this applies to the Resent-
6862 lines rather than the non-Resent- lines.
6864 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6865 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6867 58. Messages for configuration errors now include the name of the main
6868 configuration file - useful now that there may be more than one file in a
6869 list (.included file names were always shown).
6871 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6872 for those rare installations that do not start the daemon as root or run it
6873 setuid root. I've cut out the call to initgroups() if the daemon is not
6876 60. The Exim user and group can now be bound into the binary as text strings
6877 that are looked up at the start of Exim's processing.
6879 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6881 62. Added $mailstore_basename variable.
6883 63. Installed patch to sieve.c from Michael Haardt.
6885 64. When Exim failed to open the panic log after failing to open the main log,
6886 the original message it was trying to log was written to stderr and debug
6887 output, but if they were not available (the usual case in production), it
6888 was lost. Now it is written to syslog before the two lines that record the
6889 failures to open the logs.
6891 65. Users' Exim filters run in subprocesses under the user's uid. It is
6892 possible for a "deliver" command or an alias in a "personal" command to
6893 provoke an address rewrite. If logging of address rewriting is configured,
6894 this fails because the process is not running as root or exim. There may be
6895 a better way of dealing with this, but for the moment (because 4.30 needs
6896 to be released), I have disabled address rewrite logging when running a
6897 filter in a non-root, non-exim process.
6903 1. The buildconfig auxiliary program wasn't quoting the value set for
6904 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6905 not defined. This bug was masked in 4.22 by the effect that was fixed in
6908 2. Some messages that were rejected after a message id was allocated were
6909 shown as "incomplete" by exigrep. It no longer does this for messages that
6910 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6912 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6913 have allow_domain_literals set, the ID did not get logged in the <= line.
6914 Domain literals are now always recognized in Message-ID: header lines.
6916 4. The first argument for a ${extract expansion item is the key name or field
6917 number. Leading and trailing spaces in this item were not being ignored,
6918 causing some misleading effects.
6920 5. When deliver_drop_privilege was set, single queue runner processes started
6921 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6922 same command in the process it spins off) were not dropping privilege.
6924 6. When the daemon running as "exim" started a queue runner, it always
6925 re-executed Exim in the spun-off process. This is a waste of effort when
6926 deliver_drop_privilege is set. The new process now just calls the
6927 queue-runner function directly.
6933 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6936 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6937 ignored. Though the use of -oP was forcing the writing of a pid file, it
6938 was always written to the default place.
6940 3. If the message "no IP address found for host xxxx" is generated during
6941 incoming verification, it is now followed by identification of the incoming
6942 connection (so you can more easily find what provoked it).
6944 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6946 5. Added some features to "harden" Exim a bit more against certain attacks:
6948 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6949 be put in Local/Makefile. This is like the never_users runtime option,
6950 but it cannot be overridden. The default setting is "root".
6952 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6953 prefix string with which any file named in a -C command line option
6956 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6957 is retained for -C and -D only if the caller of Exim is root. Without
6958 it, the exim user may also use -C and -D and retain privilege.
6960 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6961 command line option is disabled.
6963 6. Macro names set by the -D option must start with an upper case letter, just
6964 like macro names defined in the configuration file.
6966 7. Added "dereference=" facility to LDAP.
6968 8. Two instances of the typo "uknown" in the source files are fixed.
6970 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6971 the Configure-Makefile script screwed up while processing it.
6973 10. Incorporated PCRE 4.4.
6975 11. The SMTP synchronization check was not operating right at the start of an
6976 SMTP session. For example, it could not catch a HELO sent before the client
6977 waited for the greeting. There is now a check for outstanding input at the
6978 point when the greeting is written. Because of the duplex, asynchronous
6979 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6980 way, but not yet received, when the check is performed.
6982 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6983 on TCP/IP sockets, because this apparently causes some broken clients to
6986 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6987 unchanged) from the Cygwin maintainer.
6989 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6990 was supported instead of testing for mbx. Effectively a typo.
6992 15. The spa authenticator server code was not checking that the input it
6993 received was valid base64.
6995 16. The debug output line for the "set" modifier in ACLs was not showing the
6996 name of the variable that was being set.
6998 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7000 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7001 lookup on its own. Something else was needed to trigger the lookup. For
7002 example, a match in host_lookup or the need for a host name in a host list.
7003 Now, if $sender_host_name is referenced and the host name has not yet been
7004 looked up, a lookup is performed. If the lookup fails, the variable remains
7005 empty, and $host_lookup_failed is set to "1".
7007 19. Added "eqi" as a case-independent comparison operator.
7009 20. The saslauthd authentication condition could segfault if neither service
7010 nor realm was specified.
7012 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7013 error message that was logged was misleading, and incoming SMTP
7014 connections were dropped. The message is now more accurate, and temporary
7015 errors are given to SMTP connections.
7017 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7018 (except RSET) with a 421 error, until QUIT is received. However, it was
7019 failing to send a response to QUIT.
7021 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7022 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7023 ACL is now run after the helo_try_verify_hosts code.
7025 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7026 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7027 case-independent, so other case variants are also recognized). Apparently
7028 some systems use these upper case variants.
7030 25. If more than two messages were waiting for the same host, and a transport
7031 filter was specified for the transport, Exim sent two messages over the
7032 same TCP/IP connection, and then failed with "socket operation on non-
7033 socket" when it tried to send the third.
7035 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7037 27. The extern definition of crypt16() in expand.c was not being excluded when
7038 the OS had its own crypt16() function.
7040 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7041 as a preferred synonym for return_size_limit, both as an option and as an
7044 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7046 30. Changed the default configuration ACL to relax the local part checking rule
7047 for addresses that are not in any local domains. For these addresses,
7048 slashes and pipe symbols are allowed within local parts, but the sequence
7049 /../ is explicitly forbidden.
7051 31. SPA server authentication was not clearing the challenge buffer before
7054 32. log_message in a "warn" ACL statement was writing to the reject log as
7055 well as to the main log, which contradicts the documentation and doesn't
7056 seem right (because no rejection is happening). So I have stopped it.
7058 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7059 However, I am unable to do any testing of this.
7061 34. Fixed an infelicity in the appendfile transport. When checking directories
7062 for a mailbox, to see if any needed to be created, it was accidentally
7063 using path names with one or more superfluous leading slashes; tracing
7064 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7066 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7067 contents are added to the log line that is written for every discarded
7068 recipient. (Previously a log_message setting was ignored.)
7070 36. The ${quote: operator now quotes the string if it is empty.
7072 37. The install script runs exim in order to find its version number. If for
7073 some reason other than non-existence or emptiness, which it checks, it
7074 could not run './exim', it was installing it with an empty version number,
7075 i.e. as "exim-". This error state is now caught, and the installation is
7078 38. An argument was missing from the function that creates an error message
7079 when Exim fails to connect to the socket for saslauthd authentication.
7080 This could cause Exim to crash, or give a corrupted message.
7082 39. Added isip, isip4, and isip6 to ${if conditions.
7084 40. The ACL variables $acl_xx are now saved with the message, and can be
7085 accessed later in routers, transports, and filters.
7087 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7088 strings in the file are not string-expanded.
7090 42. If a MAIL command specified a SIZE value that was too large to fit into an
7091 int variable, the check against message_size_limit failed. Such values are
7092 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7093 day this will have to be increased, but I don't think I want to be around
7094 when emails are that large.
7101 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7102 iconv() is not standard in FreeBSD.
7104 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7105 IPv6 enabled. The observed symptom was a segmentation fault on return from
7106 the function os_common_find_running_interfaces() in src/os.c.
7108 3. In the check_special_case() function in daemon.c I had used "errno" as an
7109 argument name, which causes warnings on some systems. This was basically a
7110 typo, since it was named "eno" in the comments!
7112 4. The code that waits for the clock to tick (at a resolution of some fraction
7113 of a second) so as to ensure message-id uniqueness was always waiting for
7114 at least one whole tick, when it could have waited for less. [This is
7115 almost certainly not relevant at current processor speeds, where it is
7116 unlikely to ever wait at all. But we try to future-proof.]
7118 5. The function that sleeps for a time interval that includes fractions of a
7119 second contained a race. It did not block SIGALRM between setting the
7120 timer, and suspending (a couple of lines later). If the interval was short
7121 and the sigsuspend() was delayed until after it had expired, the suspension
7122 never ended. On busy systems this could lead to processes getting stuck for
7125 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7126 process, before it forks any delivery processes. The open lookup caching
7127 mechanism meant that the open file or database connection was passed into
7128 the delivery process. The problem was that delivery processes always tidy
7129 up cached lookup data. This could cause a problem for the next delivery
7130 process started by the queue runner, because the external queue runner
7131 process does not know about the closure. So the next delivery process
7132 still has data in the lookup cache. In the case of a file lookup, there was
7133 no problem because closing a file descriptor in a subprocess doesn't affect
7134 the parent. However, if the lookup was caching a connection to a database,
7135 the connection was closed, and the second delivery process was likely to
7136 see errors such as "PGSQL: query failed: server closed the connection
7137 unexpectedly". The problem has been fixed by closing all cached lookups
7138 in a queue runner before running a delivery process.
7140 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7141 seem to have the "const" qualifier which it has on other OS. I've
7144 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7145 *of the same type* (client or server) with the same public name that an
7146 error should be diagnosed.
7148 9. When Exim looked up a host name for an IP address, but failed to find the
7149 original IP address when looking up the host name (a safety check), it
7150 output the message "<ip address> does not match any IP for NULL", which was
7151 confusing, to say the least. The bug was that the host name should have
7152 appeared instead of "NULL".
7154 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7155 user that is built into the binary, and the -C or -D options is used, root
7156 privilege is dropped before the configuration file is read. In addition,
7157 logging is switched to stderr instead of the normal log files. If the
7158 configuration then re-defines the Exim user, the unprivileged environment
7159 is probably not what is expected, so Exim logs a panic warning message (but
7162 However, if deliver_drop_privilege is set, the unprivileged state may well
7163 be exactly what is intended, so the warning has been cut out in that case,
7164 and Exim is allowed to try to write to its normal log files.
7170 1. smtp_return_error_details was not giving details for temporary sender
7171 or receiver verification errors.
7173 2. Diagnose a configuration error if two authenticators have the same public
7176 3. Exim used not to create the message log file for a message until the first
7177 delivery attempt. This could be confusing when incoming messages were held
7178 for policy or load reasons. The message log file is now created at the time
7179 the message is received, and an initial "Received" line is written to it.
7181 4. The automatically generated man page for command line options had a minor
7182 bug that caused no ill effects; however, a more serious problem was that
7183 the procedure for building the man page automatically didn't always
7184 operate. Consequently, release 4.20 contains an out-of-date version. This
7185 shouldn't happen again.
7187 5. When building Exim with embedded Perl support, the script that builds the
7188 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7189 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7191 6. The freeze_tell option was not being used for messages that were frozen on
7192 arrival, either by an ACL or by local_scan().
7194 7. Added the smtp_incomplete_transaction log selector.
7196 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7197 was accepting AUTH without a new EHLO.
7199 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7200 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7203 10. Logging of TCP/IP connections (when configured) now happens in the main
7204 daemon process instead of the child process, so that the TCP/IP connection
7205 count is more accurate (but it can never be perfect).
7207 11. The use of "drop" in a nested ACL was not being handled correctly in the
7208 outer ACL. Now, if condition failure induced by the nested "drop" causes
7209 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7210 or "require"), the connection is dropped.
7212 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7213 that yield "discard" can now be used with an "accept" or a "discard" verb,
7214 but an error is generated for any others (because I can't see a useful way
7215 to define what should happen).
7217 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7218 are now processed in the same way as lines in the Exim configuration file.
7219 In particular, continuation lines are supported.
7221 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7223 15. Added -ti meaning -t -i.
7225 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7226 domains, and warn by logging if others are found.
7228 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7229 returned from GIFCONF when Exim is trying to find the list of interfaces on
7230 a host. The code in os.c has been modified to copy each ifreq to an aligned
7231 structure in all cases.
7233 Also, in some cases, the returned ifreq's were being copied to a 'struct
7234 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7235 means the last couple of bytes of an IPv6 address could be chopped if the
7236 ifreq contained only a normal sockaddr (14 bytes storage).
7238 18. Named domain lists were not supported in the hosts_treat_as_local option.
7239 An entry such as +xxxx was not recognized, and was treated as a literal
7242 19. Ensure that header lines added by a DATA ACL are included in the reject log
7243 if the ACL subsequently rejects the message.
7245 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7246 MD5 (which is deprecated).
7248 21. When testing a filter file using -bf, Exim was writing a message when it
7249 took the sender from a "From " line in the message, but it was not doing so
7250 when it took $return_path from a Return-Path: header line. It now does.
7252 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7253 with a valid header line field name (a series of printing characters
7254 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7256 23. Changed "disc" in the source to "disk" to conform to the documentation and
7257 the book and for uniformity.
7259 24. Ignore Sendmail's -Ooption=value command line item.
7261 25. When execve() failed while trying to run a command in a pipe transport,
7262 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7263 could be confused with a return value of 69 from the command itself. This
7264 has been changed to 127, the value the shell returns if it is asked to run
7265 a non-existent command. The wording for the related log line suggests a
7266 non-existent command as the problem.
7268 26. If received_header_text expands to an empty string, do not add a Received:
7269 header line to the message. (Well, it adds a token one on the spool, but
7270 marks it "old" so that it doesn't get used or transmitted.)
7272 27. Installed eximstats 1.28 (addition of -nt option).
7274 28. There was no check for failure on the call to getsockname() in the daemon
7275 code. This can fail if there is a shortage of resources on the system, with
7276 ENOMEM, for example. A temporary error is now given on failure.
7278 29. Contrary to the C standard, it seems that in some environments, the
7279 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7280 program. Exim now does this explicitly; it affects the formatting of
7281 timestamps using strftime().
7283 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7284 complaints. I've now initialized all the variables, to avoid this.
7286 32. Header lines added by a system filter were not being "seen" during
7287 transport-time rewrites.
7289 33. The info_callback() function passed to OpenSSL is set up with type void
7290 (*)(SSL *, int, int), as described somewhere. However, when calling the
7291 function (actually a macro) that sets it up, the type void(*)() is
7292 expected. I've put in a cast to prevent warnings from picky compilers.
7294 34. If a DNS black list lookup found a CNAME record, but there were no A
7295 records associated with the domain it pointed at, Exim crashed.
7297 35. If a DNS black list lookup returned more than one A record, Exim ignored
7298 all but the first. It now scans all returned addresses if a particular IP
7299 value is being sought. In this situation, the contents of the
7300 $dnslist_value variable are a list of all the addresses, separated by a
7303 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7304 to accept a host name and all its aliases if the forward lookup for any of
7305 them yielded the IP address of the incoming connection. Now it accepts only
7306 those names whose forward lookup yields the correct IP address. Any other
7307 names are discarded. This closes a loophole whereby a rogue DNS
7308 administrator could create reverse DNS records to break through a
7309 wildcarded host restriction in an ACL.
7311 37. If a user filter or a system filter that ran in a subprocess used any of
7312 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7313 the wrong values were passed to the pipe command ($thisaddress had the
7314 value of $0, $0 had the value of $1, etc). This bug was introduced by
7315 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7317 38. Improved the line breaking for long SMTP error messages from ACLs.
7318 Previously, if there was no break point between 40 and 75 characters, Exim
7319 left the rest of the message alone. Two changes have been made: (a) I've
7320 reduced the minimum length to 35 characters; (b) if it can't find a break
7321 point between 35 and 75 characters, it looks ahead and uses the first one
7322 that it finds. This may give the occasional overlong line, but at least the
7323 remaining text gets split now.
7325 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7326 file descriptors might be low, and that setting 1000 would always raise it.
7327 It turns out that in some environments, the limit is already over 1000 and
7328 that lowering it causes trouble. So now Exim takes care not to decrease it.
7330 40. When delivering a message, the value of $return_path is set to $sender_
7331 address at the start of routing (routers may change the value). By an
7332 oversight, this default was not being set up when an address was tested by
7333 -bt or -bv, which affected the outcome if any router or filter referred to
7336 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7337 log only when "message" or "log_message" are set. However, if one of the
7338 conditions was an address verification, or a call to a nested ACL, the
7339 messages generated by the underlying test were being passed through. This
7340 no longer happens. The underlying message is available in $acl_verify_
7341 message for both "message" and "log_message" expansions, so it can be
7342 passed through if needed.
7344 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7345 new expansion $bh_ to give the encoded byte string without charset
7346 translation. Translation happens only if iconv() is available; HAVE_ICONV
7347 indicates this at build time. HEADERS_CHARSET gives the charset to
7348 translate to; headers_charset can change it in the configuration, and
7349 "headers charset" can change it in an individual filter file.
7351 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7352 that creates RFC 2047 encoded "words" labels them as that charset instead
7353 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7354 expansion operator; (ii) when Exim creates a From: line for a local
7355 message; (iii) when a header line is rewritten to include a "phrase" part.
7357 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7358 buggy, causing it to skip the first lines of messages whose message ID
7359 ended in 'D'. This would not have bitten before Exim release 4.14, because
7360 message IDs were unlikely to end in 'D' before then. The effect was to have
7361 incorrect size information for certain domains.
7363 45. #include "config.h" was missing at the start of the crypt16.c module. This
7364 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7367 46. If there was a timeout during a "random" callout check, Exim treated it as
7368 a failure of the random address, and carried on sending RSET and the real
7369 address. If the delay was just some slowness somewhere, the response to the
7370 original RCPT would be taken as a response to RSET and so on, causing
7371 mayhem of various kinds.
7373 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7374 when I implemented it. It didn't allow for the fact that some option values
7375 may legitimately be negative (e.g. size_addition), and it didn't even do
7376 the right test for positive values.
7378 48. Domain names in DNS records are case-independent. Exim always looks them up
7379 in lower case. Some resolvers return domain names in exactly the case they
7380 appear in the zone file, that is, they may contain uppercase letters. Not
7381 all resolvers do this - some return always lower case. Exim was treating a
7382 change of case by a resolver as a change of domain, similar to a widening
7383 of a domain abbreviation. This triggered its re-routing code and so it was
7384 trying to route what was effectively the same domain again. This normally
7385 caused routing to fail (because the router wouldn't handle the domain
7386 twice). Now Exim checks for this case specially, and just changes the
7387 casing of the domain that it ultimately uses when it transmits the message
7390 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7393 50. If a filter generated a file delivery with a non-absolute name (possible if
7394 no home directory exists for the router), the forbid_file option was not
7397 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7398 the existing equality matching.
7400 52. Exim was using ints instead of ino_t variables in some places where it was
7401 dealing with inode numbers.
7403 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7404 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7405 called TMPDIR, and if it finds it is different, it changes its value.
7407 54. The smtp_printf() function is now made available to local_scan() so
7408 additional output lines can be written before returning. There is also an
7409 smtp_fflush() function to enable the detection of a dropped connection.
7410 The variables smtp_input and smtp_batched_input are exported to
7413 55. Changed the default runtime configuration: the message "Unknown user"
7414 has been removed from the ACL, and instead placed on the localuser router,
7415 using the cannot_route_message feature. This means that any verification
7416 failures that generate their own messages won't get overridden. Similarly,
7417 the "Unrouteable address" message that was in the ACL for unverifiable
7418 relay addresses has also been removed.
7420 56. Added hosts_avoid_esmtp to the smtp transport.
7422 57. The exicyclog script was not checking for the esoteric option
7423 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7424 will work only if exicyclog is run under the appropriate euid.
7426 58. Following a discussion on the list, the rules by which Exim recognises line
7427 endings on incoming messages have been changed. The -dropcr and drop_cr
7428 options are now no-ops, retained only for backwards compatibility. The
7429 following line terminators are recognized: LF CRLF CR. However, special
7430 processing applies to CR:
7432 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7433 nor a local message in the state where . is a terminator.
7435 (ii) If a bare CR is encountered in a header line, an extra space is added
7436 after the line terminator so as not to end the header. The reasoning
7437 behind this is that bare CRs in header lines are most likely either
7438 to be mistakes, or people trying to play silly games.
7440 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7441 was being incorrectly given as 18 bytes larger than it should have been.
7442 This is a VOB (very old bug).
7444 60. This may never have affected anything current, but just in case it has:
7445 When the local host is found other than at the start of a list of hosts,
7446 the local host, those with the same MX, and any that follow, are discarded.
7447 When the list in question was part of a longer list of hosts, the following
7448 hosts (not currently being processed) were also being discarded. This no
7449 longer happens. I'm not sure if this situation could ever has previously
7452 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7455 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7456 header. This is something that is recommended in a new Internet Draft, and
7457 is something that is documented as being done by Sendmail. There are two
7458 possible values. For messages generated by the autoreply transport, Exim
7461 Auto-Submitted: auto-replied
7463 whereas for all other generated messages (e.g. bounces) it adds
7465 Auto-Submitted: auto-generated
7467 63. The "personal" condition in filters now includes a test for the
7468 Auto-Submitted: header. If it contains the string "auto-" the message it
7469 not considered personal.
7471 64. Added rcpt_include_affixes as a generic transport option.
7473 65. Added queue_only_override (default true).
7475 66. Added the syslog_duplication option.
7477 67. If what should have been the first header line of a message consisted of
7478 a space followed by a colon, Exim was mis-interpreting it as a header line.
7479 It isn't of course - it is syntactically invalid and should therefore be
7480 treated as the start of the message body. The misbehaviour could have
7481 caused a number of strange effects, including loss of data in subsequent
7482 header lines, and spool format errors.
7484 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7485 client host had authenticated. This control can now be exercised by an ACL
7486 for more flexibility.
7488 69. By default, callouts do not happen when testing with -bh. There is now a
7489 variant, -bhc, which does actually run the callout code, including
7490 consulting and updating the callout cache.
7492 70. Added support for saslauthd authentication, courtesy of Alexander
7495 71. If statvfs() failed on the spool or log directories while checking their
7496 size for availability, Exim confusingly gave the error "space shortage".
7497 Furthermore, in debugging mode it crashed with a floating point exception.
7498 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7499 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7500 serious problem, Exim now writes to the main and panic logs when this
7501 happens, with details of the failure. It then refuses to accept the
7502 incoming message, giving the message "spool directory problem" or "log
7503 directory problem" with a 421 code for SMTP messages.
7505 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7506 0, 1, and 2 exist, because some OS complain for execs without them (see
7507 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7508 descriptors. However, the code omitted to check that the open succeeded,
7509 causing mysterious errors if for some reason the permissions on /dev/null
7510 got screwed. Now Exim writes a message to the main and panic logs, and
7511 bombs out if it can't open /dev/null.
7513 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7514 interact so that it is all more flexible. It is supposed to remain
7515 backwards compatible. Also added extra_local_interfaces.
7517 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7518 to bomb out with an assertion failure - to the client this appears as a
7519 connection drop. This problem occurs in the part of the code that was taken
7520 from the Samba project. Fortunately, the assertion is in a very simple
7521 function, so I have fixed this by reproducing the function inline in the
7522 one place where it is called, and arranging for authentication to fail
7523 instead of killing the process with assert().
7525 75. The SPA client code was not working when the server requested OEM rather
7526 than Unicode encoding.
7528 76. Added code to make require_files with a specific uid setting more usable in
7529 the case where statting the file as root fails - usually a non-root-mounted
7530 NFS file system. When this happens and the failure is EACCES, Exim now
7531 forks a subprocess and does the per-uid checking as the relevant uid.
7533 77. Added process_log_path.
7535 78. If log_file_path was not explicitly set, a setting of check_log_space or
7536 check_log_inodes was ignored.
7538 79. If a space check for the spool or log partitions fails, the incident is now
7539 logged. Of course, in the latter case the data may get lost...
7541 80. Added the %p formatting code to string_format() so that it can be used to
7542 print addresses in debug_print(). Adjusted all the address printing in the
7543 debugging in store.c to use %p rather than %d.
7545 81. There was a concern that a line of code in smtp_in.c could overflow a
7546 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7547 initially expressed, the concern was not well-founded, because trailing
7548 spaces are removed early. However, if the trailing spaces were followed by
7549 a NULL, they did not get removed, so the overflow was possible. Two fixes
7552 (a) I re-wrote the offending code in a cleaner fashion.
7553 (b) If an incoming SMTP command contains a NULL character, it is rejected
7556 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7557 runs initgroups(), so that if the Exim user is in any additional groups,
7558 they will be used during message reception.
7564 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob