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 OpenSSL: With debug enabled output keying information sufficient, server
12 side, to decode a TLS 1.3 packet capture.
14 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
15 Previously the default library behaviour applied, sending two, each in
18 JH/03 Debug output for ACL now gives the config file name and line number for
21 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
23 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
25 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
26 buffer overrun for (non-chunking) other transports.
28 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
29 TLS1.3, means that a server rejecting a client certificate is not visible
30 to the client until the first read of encrypted data (typically the
31 response to EHLO). Add detection for that case and treat it as a failed
32 TLS connection attempt, so that the normal retry-in-clear can work (if
35 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
36 and/or domain. Found and fixed by Jason Betts.
38 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
39 configuration). If a CNAME target was not a wellformed name pattern, a
42 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
43 the OS reports them interleaved with other addresses.
45 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
46 used both for input and for a verify callout, both encrypted, SMTP
47 responses being sent by the server could be lost. This resulted in
48 dropped connections and sometimes bounces generated by a peer sending
51 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
52 string. Previously it was possible to cause undefined behaviour in a
53 library routine (usually a crash). Found by "zerons".
55 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
58 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
59 API was removed, so update to use the newer ones.
61 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
62 any timeout set, is taking a long time. Previously we would hang on to a
63 rotated logfile "forever" if the input was arriving with long gaps
64 (a previous attempt to fix addressed lack, for a long time, of initial
67 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
68 shared (NFS) environment. The length of the tempfile name is now
69 4 + 16 ("hdr.$message_exim_id") which might break on file
70 systems which restrict the file name length to lower values.
73 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
74 shared (NFS) environment.
76 HS/02 Bug 2392: exigrep does case sensitive *option* processing (as it
77 did for all versions <4.90). Notably -M, -m, --invert, -I may be
80 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
81 on some platforms for bit 31.
83 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
84 to changes apparently associated with TLS1.3 handling some of the APIs
85 previously used were either nonfunctional or inappropriate. Strings
86 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
87 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
88 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
89 This affects log line X= elements, the $tls_{in,out}_cipher variables,
90 and the use of specific cipher names in the encrypted= ACL condition.
92 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
94 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
95 verification result was not updated unless hosts_require_ocsp applied.
97 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
98 queue_list_requires_admin set to false, non-admin users were denied the
101 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
102 directory-of-certs mode. Previously they were advertised despite the
105 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
106 A single TCP connection by a client will now hold a TLS connection open
107 for multiple message deliveries, by default. Previoud the default was to
110 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
111 default. If built with the facility, DANE will be used. The facility
112 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
114 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
115 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
116 must be defined and you must still, unless you define DISABLE_TLS, manage
117 the the include-dir and library-file requirements that go with that
118 choice. Non-TLS builds are still supported.
120 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
123 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
124 default. If the platform supports and has the facility enabled, it will
125 be requested on all coneections.
127 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
128 controlled by the build-time option SUPPORT_PIPE_CONNECT.
130 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
132 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
133 success-DSN messages. Previously the From: header was always the default
134 one for these; the option was ignored.
136 JH/28 Fix the timeout on smtp response to apply to the whole response.
137 Previously it was reset for every read, so a teergrubing peer sending
138 single bytes within the time limit could extend the connection for a
139 long time. Credit to Qualsys Security Advisory Team for the discovery.
141 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
142 delivery address, which leaked information of the results of local
143 forwarding. Change to the original envelope recipient address, per
146 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
147 requested. Previously not bounce was generated and a log entry of
148 error ignored was made.
150 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
152 JH/32 Introduce a general tainting mechanism for values read from the input
153 channel, and values derived from them. Refuse to expand any tainted
154 values, to catch one form of exploit.
156 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
157 was unused and the unexpanded text used for the test. Found and
158 fixed by Ruben Jenster.
160 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
161 an attempt to use a TLS library read routine dereffed a nul pointer,
164 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
165 them in our smtp response.
167 JH/35 Have the general router option retry_use_local_part default to true when
168 any of the restrictive preconditions are set (to anything). Previously it
169 was only for check_local user. The change removes one item of manual
170 configuration which is required for proper retries when a remote router
171 handles a subset of addresses for a domain.
177 JH/01 Remove code calling the customisable local_scan function, unless a new
178 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
180 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
181 non-signal-safe functions being used.
183 JH/03 Bug 2269: When presented with a received message having a stupidly large
184 number of DKIM-Signature headers, disable DKIM verification to avoid
185 a resource-consumption attack. The limit is set at twenty.
187 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
188 report of oldest_pass in ${authres } in consequence, and separate out
189 some descriptions of reasons for verification fail.
191 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
192 files in the spool were present and unlocked. A queue-runner could spot
193 them, resulting in a duplicate delivery. Fix that by doing the unlock
194 after the unlink. Investigation by Tim Stewart. Take the opportunity to
195 add more error-checking on spoolfile handling while that code is being
198 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
199 No known attacks, no CVE, this is defensive hardening.
201 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
202 a queue-runner could start a delivery while other operations were ongoing.
203 Cutthrough delivery was a common victim, resulting in duplicate delivery.
204 Found and investigated by Tim Stewart. Fix by using the open message data
205 file handle rather than opening another, and not locally closing it (which
206 releases a lock) for that case, while creating the temporary .eml format
207 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
209 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
210 $sender_verify_failure/$recipient_verify_failure to "random".
212 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
215 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
216 Previously this would segfault.
218 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
221 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
222 like zero, since the resolver should be doing this for us, But we need one
223 as a CNAME but no MX presence gets the CNAME returned; we need to check
224 that doesn't point to an MX to declare it "no MX returned" rather than
225 "error, loop". A new main option is added so the older capability of
226 following some limited number of chain links is maintained.
228 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
230 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
231 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
232 now-deprecated earlier definitions used only specified the range up to TLS
233 1.2 (in the older-version library docs).
235 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
237 JH/15 Rework TLS client-side context management. Stop using a global, and
238 explicitly pass a context around. This enables future use of TLS for
239 connections to service-daemons (eg. malware scanning) while a client smtp
240 connection is using TLS; with cutthrough connections this is quite likely.
242 JH/16 Fix ARC verification to do AS checks in reverse order.
244 JH/17 Support a "tls" option on the ${readsocket } expansion item.
246 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
247 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
248 Previously the "utf8" would be re-prepended for every additional message.
250 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
251 Previously thery were accepted, resulting in issues when attempting to
252 forward messages to a non-supporting MTA.
254 PP/02 Let -n work with printing macros too, not just options.
256 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
257 one parent address was copied, and bogus data was used at delivery-logging
258 time. Either a crash (after delivery) or bogus log data could result.
259 Discovery and analysis by Tim Stewart.
261 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
262 Previously if the string ended mid-character, we did not insert the
263 promised '?' replacement.
265 PP/04 Documentation: current string operators work on bytes, not codepoints.
267 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
268 should pack well giving a smaller memory footprint so better caching and
269 therefore performance. Group the declarations where this can't be done so
270 that the byte-sized flag variables are not interspersed among pointer
271 variables, giving a better chance of good packing by the compiler.
273 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
274 non-null, to avoid issues with sites running BATV. Previously reports were
275 sent with an empty envelope sender so looked like bounces.
277 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
278 The ignore_error flag wasn't being returned from the filter subprocess so
279 was not set for later routers. Investigation and fix by Matthias Kurz.
281 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
282 and a msg:complete for the whole, when a message is manually removed using
283 -Mrm. Developement by Matthias Kurz, hacked on by JH.
285 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
286 a "Gnu special" function, asprintf() in the DB utility binary builds; I
287 hope that is portable enough.
289 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
290 requiring a known-CA anchor certificate; make it now rely entirely on the
291 TLSA as an anchor. Checking the name on the leaf cert against the name
292 on the A-record for the host is still done for TA (but not for EE mode).
294 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
295 included in delivery lines for non-proxied connections, when compiled with
296 SUPPORT_SOCKS and running with proxy logging enabled.
298 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
299 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
300 move the existing event to fire before the normal logging of message
301 failure so that custom logging is bracketed by normal logging.
303 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
304 msg:fail:internal event. Developement by Matthias Kurz.
306 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
307 far too small for todays use of crypto signatures stored there. Go all
308 the way to the max DNS message size of 64kB, even though this might be
309 overmuch for IOT constrained device use.
311 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
312 copy a string over itself. The library routine is documented as not
313 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
315 JH/32 For main options check_spool_space and check_inode_space, where the
316 platform supports 64b integers, support more than the previous 2^31 kB
317 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
318 the previous G, M, k.
320 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
321 $authenticated_fail_id variable on authentication failure. Previously
324 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
325 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
326 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
327 GNUTLS_SEC_PARAM_MEDIUM.
329 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
330 side. Previously we would continue as if no SNI had been received.
332 JH/36 Harden the handling of string-lists. When a list consisted of a sole
333 "<" character, which should be a list-separator specification, we walked
334 off past the nul-terimation.
336 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
337 causes) even when the retry time is not yet met. Previously they were
338 not, meaning that when (say) an account was over-quota and temp-rejecting,
339 and multiple senders' messages were queued, only one sender would get
340 notified on each configured delay_warning cycle.
342 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
344 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
345 cipher-suites, an error can be left on the stack even for a succeeding
346 accept; this results in impossible error messages when a later operation
349 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
350 return error codes indicating retry. Under TLS1.3 this becomes required.
352 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
353 it only wrote the new authenticators, resulting in a lack of tracking of
354 peer changes of ESMTP extensions until the next cache flush.
356 JH/41 Fix the loop reading a message header line to check for integer overflow,
357 and more-often against header_maxsize. Previously a crafted message could
358 induce a crash of the recive process; now the message is cleanly rejected.
360 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
361 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
367 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
368 When redis_servers is set to a list of > 1 element, and the Redis servers
369 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
370 case of MOVED into a DEFER case instead, thus moving the query onto the
371 next server in the list. For a cluster of N elements, all N servers must
372 be defined in redis_servers.
374 GF/02 Catch and remove uninitialized value warning in exiqsumm
375 Check for existence of @ARGV before looking at $ARGV[0]
377 JH/01 Replace the store_release() internal interface with store_newblock(),
378 which internalises the check required to safely use the old one, plus
379 the allocate and data copy operations duplicated in both (!) of the
380 extant use locations.
382 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
383 modifier. This matches the restriction on the commandline.
385 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
386 Previously only the last row was returned.
388 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
389 we assumed that tags in the header were well-formed, and parsed the
390 element content after inspecting only the first char of the tag.
391 Assumptions at that stage could crash the receive process on malformed
394 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
395 While running the DKIM ACL we operate on the Permanent memory pool so that
396 variables created with "set" persist to the DATA ACL. Also (at any time)
397 DNS lookups that fail create cache records using the Permanent pool. But
398 expansions release any allocations made on the current pool - so a dnsdb
399 lookup expansion done in the DKIM ACL releases the memory used for the
400 DNS negative-cache, and bad things result. Solution is to switch to the
401 Main pool for expansions.
402 While we're in that code, add checks on the DNS cache during store_reset,
403 active in the testsuite.
404 Problem spotted, and debugging aided, by Wolfgang Breyha.
406 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
407 When none of the hosts presented to a transport match an already-open
408 connection, close it and proceed with the list. Previously we would
409 queue the message. Spotted by Lena with Yahoo, probably involving
412 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
413 Previously a spurious "250 OK id=" response was appended to the proper
416 JH/08 The "support for" informational output now, which built with Content
417 Scanning support, has a line for the malware scanner interfaces compiled
418 in. Interface can be individually included or not at build time.
420 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
421 by the template makefile "src/EDITME". The "STREAM" support for an older
422 ClamAV interface method is removed.
424 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
425 rows affected is given instead).
427 JH/11 The runtime Berkeley DB library version is now additionally output by
428 "exim -d -bV". Previously only the compile-time version was shown.
430 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
431 SMTP connection. Previously, when one had more receipients than the
432 first, an abortive onward connection was made. Move to full support for
433 multiple onward connections in sequence, handling cutthrough connection
434 for all multi-message initiating connections.
436 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
437 routers. Previously, a multi-recipient message would fail to match the
438 onward-connection opened for the first recipient, and cause its closure.
440 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
441 a timeout on read on a GnuTLS initiating connection, resulting in the
442 initiating connection being dropped. This mattered most when the callout
443 was marked defer_ok. Fix to keep the two timeout-detection methods
446 JH/15 Relax results from ACL control request to enable cutthrough, in
447 unsupported situations, from error to silently (except under debug)
448 ignoring. This covers use with PRDR, frozen messages, queue-only and
451 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
453 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
454 metadata, resulting in a crash in free().
456 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
457 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
458 Broken also in d185889f4, with init system revamp.
460 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
461 Previously we abruptly closed the connection after reading a malware-
462 found indication; now we go on to read the "scan ok" response line,
465 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
466 ACL. Previously, a crash would result.
468 JH/19 Speed up macro lookups during configuration file read, by skipping non-
469 macro text after a replacement (previously it was only once per line) and
470 by skipping builtin macros when searching for an uppercase lead character.
472 JH/20 DANE support moved from Experimental to mainline. The Makefile control
473 for the build is renamed.
475 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
476 was allocated for every new TLS startup, meaning one per message. Fix
477 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
479 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
480 reported the original. Fix to report (as far as possible) the ACL
481 result replacing the original.
483 JH/23 Fix memory leak during multi-message connections using STARTTLS under
484 OpenSSL. Certificate information is loaded for every new TLS startup,
485 and the resources needed to be freed.
487 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
489 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
492 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
493 DATA response info to the (existing) per-recipient response info for
494 the "C=" log element. It can have useful tracking info from the
495 destination system. Patch from Simon Arlott.
497 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
498 length value. Previously this would segfault.
500 HS/02 Support Avast multiline protoocol, this allows passing flags to
501 newer versions of the scanner.
503 JH/28 Ensure that variables possibly set during message acceptance are marked
504 dead before release of memory in the daemon loop. This stops complaints
505 about them when the debug_store option is enabled. Discovered specifically
506 for sender_rate_period, but applies to a whole set of variables.
507 Do the same for the queue-runner and queue-list loops, for variables set
508 from spool message files. Do the same for the SMTP per-message loop, for
509 certain variables indirectly set in ACL operations.
511 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
512 as a multi-recipient message from a mailinglist manager). The coding had
513 an arbitrary cutoff number of characters while checking for more input;
514 enforced by writing a NUL into the buffer. This corrupted long / fast
515 input. The problem was exposed more widely when more pipelineing of SMTP
516 responses was introduced, and one Exim system was feeding another.
517 The symptom is log complaints of SMTP syntax error (NUL chars) on the
518 receiving system, and refused recipients seen by the sending system
519 (propating to people being dropped from mailing lists).
520 Discovered and pinpointed by David Carter.
522 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
523 replaced by the ${authresults } expansion.
525 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
527 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
528 allows proper process termination in container environments.
530 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
531 Previously the "final dot" had a newline after it; ensure it is CR,LF.
533 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
534 and "err_perm", deprecated since 4.83 when the RFC-defined words
535 "temperror" and "permerror" were introduced.
537 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
538 transport-filters or DKIM-signing. The restriction was lost in the
539 consolidation of verify-callout and delivery SMTP handling.
540 Extend the restriction to also cover ARC-signing.
542 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
543 in defer=pass mode supply a 450 to the initiator. Previously the message
546 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
547 tls_require_ciphers is used as before.
549 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
550 "pass_unscanned". Only tmpfails from the scanner are written to
551 the paniclog, as they may require admin intervention (permission
552 denied, license issues). Other scanner errors (like decompression
553 bombs) do not cause a paniclog entry.
555 JH/36 Fix reinitialisation of DKIM logging variable between messages.
556 Previously it was possible to log spurious information in receive log
559 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
560 triggered odd behaviour from Outlook Express clients.
562 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
565 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
566 since the IETF WG has not yet settled on that versus the original
567 "bare" representation.
569 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
570 Previously the millisecond value corrupted the output.
571 Fix also for syslog_pid=no and log_selector +pid, for which the pid
572 corrupted the output.
578 JH/01 Rework error string handling in TLS interface so that the caller in
579 more cases is responsible for logging. This permits library-sourced
580 string to be attached to addresses during delivery, and collapses
581 pairs of long lines into single ones.
583 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
584 during configuration. Wildcards are allowed and expanded.
586 JH/02 Rework error string handling in DKIM to pass more info back to callers.
587 This permits better logging.
589 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
590 do not close it down and have the child transport start it up again on
591 the passed-on TCP connection. Instead, proxy the child (and any
592 subsequent ones) for TLS via a unix-domain socket channel. Logging is
593 affected: the continued delivery log lines do not have any DNSSEC, TLS
594 Certificate or OCSP information. TLS cipher information is still logged.
596 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
597 identical IP addresses on different listening ports. Will also affect
600 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
601 add noisy ifdef guards to special-case this sillyness.
602 Patch from Bernd Kuhls.
604 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
605 than 255 are no longer allowed.
607 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
608 Disable the session-cache too, which might reduce our load. Since we
609 currrectly use a new context for every connection, both as server and
610 client, there is no benefit for these.
611 GnuTLS appears to not support tickets server-side by default (we don't
612 call gnutls_session_ticket_enable_server()) but client side is enabled
613 by default on recent versions (3.1.3 +) unless the PFS priority string
616 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
617 <https://reproducible-builds.org/specs/source-date-epoch/>.
619 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
620 the check for any unsuccessful recipients did not notice the limit, and
621 erroneously found still-pending ones.
623 JH/08 Pipeline CHUNKING command and data together, on kernels that support
624 MSG_MORE. Only in-clear (not on TLS connections).
626 JH/09 Avoid using a temporary file during transport using dkim. Unless a
627 transport-filter is involved we can buffer the headers in memory for
628 creating the signature, and read the spool data file once for the
629 signature and again for transmission.
631 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
632 4.77 as the kernel support then wasn't solid, having issues in 64bit
633 mode. Now, it's been long enough. Add support for FreeBSD also.
635 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
636 case where the routing stage had gathered several addresses to send to
637 a host before calling the transport for the first, we previously failed
638 to close down TLS in the old transport process before passing the TCP
639 connection to the new process. The new one sent a STARTTLS command
640 which naturally failed, giving a failed delivery and bloating the retry
641 database. Investigation and fix prototype from Wolfgang Breyha.
643 JH/12 Fix check on SMTP command input synchronisation. Previously there were
644 false-negatives in the check that the sender had not preempted a response
645 or prompt from Exim (running as a server), due to that code's lack of
646 awareness of the SMTP input buffering.
648 PP/04 Add commandline_checks_require_admin option.
649 Exim drops privileges sanely, various checks such as -be aren't a
650 security problem, as long as you trust local users with access to their
651 own account. When invoked by services which pass untrusted data to
652 Exim, this might be an issue. Set this option in main configuration
653 AND make fixes to the calling application, such as using `--` to stop
656 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
657 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
658 responses to those, into a single TLS record each way (this usually means
659 a single packet). As a side issue, smtp_enforce_sync now works on TLS
662 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
663 affects you only if you're dancing at the edge of the param size limits.
664 If you are, and this message makes sense to you, then: raise the
665 configured limit or use OpenSSL 1.1. Nothing we can do for older
668 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
669 cmdline element to get the documented default one. Previously it was
672 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
673 are unsuable for non-message-specific reasons - eg. connection timeout,
674 banner-time rejection.
676 JH/16 Fix logging of delivery remote port, when specified by router, under
679 PP/06 Repair manualroute's ability to take options in any order, even if one
680 is the name of a transport.
683 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
685 JH/17 Change the list-building routines interface to use the expanding-string
686 triplet model, for better allocation and copying behaviour.
688 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
689 Previously it was constructed the first time a possibly-matching string
690 was met in the configuration file input during startup; now it is done
693 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
694 compatible one, to avoid the (poorly documented) possibility of a config
695 file in the working directory redirecting the DB files, possibly correpting
696 some existing file. CVE-2017-10140 assigned for BDB.
698 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
699 cache-hot. Previously, although the result was properly cached, the
700 initial verify call returned a defer.
702 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
703 the main verify for receipient in uncached-mode.
705 JH/22 Retire historical build files to an "unsupported" subdir. These are
706 defined as "ones for which we have no current evidence of testing".
708 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
709 if present. Previously it was ignored.
711 JH/24 Start using specified-initialisers in C structure init coding. This is
712 a C99 feature (it's 2017, so now considered safe).
714 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
715 if was a fixed-sized field and bitmask ops via macros; it is now more
718 PP/07 GitHub PR 56: Apply MariaDB build fix.
719 Patch provided by Jaroslav Škarvada.
721 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
722 during Coverity cleanups [4.87 JH/47]
723 Diagnosis and fix provided by Michael Fischer v. Mollard.
725 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
726 the right size to place the terminating semicolon on its own folded
727 line, the header hash was calculated to an incorrect value thanks to
728 the (relaxed) space the fold became.
730 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
731 and confused the parent.
733 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
734 which could crash as a result. This could lead to undeliverable messages.
736 JH/28 Logging: "next input sent too soon" now shows where input was truncated
739 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
740 matters on fast-turnover and PID-randomising systems, which were getting
741 out-of-order delivery.
743 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
744 a possibly-overlapping copy. The symptom was that "Remote host closed
745 connection in response to HELO" was logged instead of the actual 4xx
748 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
749 Previously only that bufferd was discarded, resulting in SYMTP command
752 JH/32 DKIM: when a message has multiple signatures matching an identity given
753 in dkim_verify_signers, run the dkim acl once for each. Previously only
754 one run was done. Bug 2189.
756 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
757 "panic the current process" to "deliberately defer". The panic log is
758 still written with the problem list name; the mail and reject logs now
759 get a temp-reject line for the message that was being handled, saying
760 something like "domains check lookup or other defer". The SMTP 451
761 message is still "Temporary local problem".
763 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
764 A crafted sequence of BDAT commands could result in in-use memory beeing
765 freed. CVE-2017-16943.
767 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
768 from SMTP input. Previously it was always done; now only done for DATA
769 and not BDAT commands. CVE-2017-16944.
771 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
772 to the message (such as an overlong header line). Previously this was
773 not done and we did not exit BDAT mode. Followon from the previous item
774 though a different problem.
780 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
781 than -2003 did; needs libidn2 in addition to libidn.
783 JH/02 The path option on a pipe transport is now expanded before use.
785 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
786 Patch provided by "Björn", documentation fix added too.
788 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
789 missing a wire-to-host endian conversion.
791 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
792 close after a BDAT command line could be taken as a following command,
793 giving a synch failure. Fix by only checking for synch immediately
794 before acknowledging the chunk.
796 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
797 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
798 macro. Patches provided by Josh Soref.
800 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
801 Previously we did not; the RFC seems ambiguous and VRFY is not listed
802 by IANA as a service extension. However, John Klensin suggests that we
805 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
806 the dkim code may be unix-mode line endings rather than smtp wire-format
807 CRLF, so prepend a CR to any bare LF.
809 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
810 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
812 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
813 the first were themselves being wrongly included in the feed into dkim
814 processing; with most chunk sizes in use this resulted in an incorrect
815 body hash calculated value.
817 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
818 DKIM signature block, for verification. Although advised against by
819 standards it is specifically not ruled illegal.
821 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
823 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
824 missing a body hash (the bh= tag).
826 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
827 It seems that HAProxy sends the Proxy Protocol information in clear and
828 only then does a TLS startup, so do the same.
830 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
831 TCP connections (such as for Spamd) unless the daemon successfully set
832 Fast Open mode on its listening sockets. This fixes breakage seen on
833 too-old kernels or those not configured for Fast Open, at the cost of
834 requiring both directions being enabled for TFO, and TFO never being used
835 by non-daemon-related Exim processes.
837 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
838 endings, at least on the first header line. Try to canonify any that get
839 past that check, despite the cost.
841 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
842 now limited to an arbitrary five deep, while parsing addresses with the
843 strip_excess_angle_brackets option enabled.
845 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
846 instead leave the unprompted TLS handshake in socket buffer for the
847 TLS library to consume.
849 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
851 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
853 JH/16 Drop variables when they go out of scope. Memory management drops a whole
854 region in one operation, for speed, and this leaves assigned pointers
855 dangling. Add checks run only under the testsuite which checks all
856 variables at a store-reset and panics on a dangling pointer; add code
857 explicitly nulling out all the variables discovered. Fixes one known
858 bug: a transport crash, where a dangling pointer for $sending_ip_address
859 originally assigned in a verify callout, is re-used.
861 PP/06 Drop '.' from @INC in various Perl scripts.
863 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
865 PP/08 Reduce a number of compilation warnings under clang; building with
866 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
867 should be warning-free.
869 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
871 HS/01 Fix portability problems introduced by PP/08 for platforms where
872 realloc(NULL) is not equivalent to malloc() [SunOS et al].
874 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
875 chunk. This allows us to accept broken chunked messages. We need a more
876 general solution here.
878 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
879 already-broken messages in the queue.
881 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
883 JH/19 Fix reference counting bug in routing-generated-address tracking.
889 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
890 supports it and a size is available (ie. the sending peer gave us one).
892 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
893 years of being deprecated). The replacements are the ACLs
894 acl_smtp_mime and acl_not_smtp_mime.
896 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
897 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
898 or even an in-clear connection were permitted. Now, if the host lookup
899 was dnssec and dane was requested then the host is only used if the
900 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
901 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
902 if one fails this test.
903 This means that a poorly-configured remote DNS will make it incommunicado;
904 but it protects against a DNS-interception attack on it.
906 JH/04 Bug 1810: make continued-use of an open smtp transport connection
907 non-noisy when a race steals the message being considered.
909 JH/05 If main configuration option tls_certificate is unset, generate a
910 self-signed certificate for inbound TLS connections.
912 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
913 in rewrites and routers.
915 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
916 and logged a warning sing 4.83; now they are a configuration file error.
918 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
919 (lacking @domain). Apply the same qualification processing as RCPT.
921 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
923 JH/10 Support ${sha256:} applied to a string (as well as the previous
926 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
927 a cutthrough deliver is pending, as we always want to make a connection.
928 This also avoids re-routing the message when later placing the cutthrough
929 connection after a verify cache hit.
930 Do not update it with the verify result either.
932 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
933 when routing results in more than one destination address.
935 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
936 signing (which inhibits the cutthrough capability). Previously only
937 the presence of an option was tested; now an expansion evaluating as
938 empty is permissible (obviously it should depend only on data available
939 when the cutthrough connection is made).
941 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
942 the relevant preceding SMTP command did not note the pipelining mode.
944 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
945 Previously they were not counted.
947 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
948 as one having no matching records. Previously we deferred the message
949 that needed the lookup.
951 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
952 distinguished as "(=".
954 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
955 for missing MX records. Previously it only worked for missing A records.
957 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
959 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
960 after the data-go-ahead and data-ack. Patch from Jason Betts.
962 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
963 even for a "none" policy. Patch from Tony Meyer.
965 JH/22 Fix continued use of a connection for further deliveries. If a port was
966 specified by a router, it must also match for the delivery to be
969 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
970 When one of the recipients of a message was unsuitable for the connection
971 (has no matching addresses), we lost track of needing to mark it
972 deferred. As a result mail would be lost.
974 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
976 JH/25 Decoding ACL controls is now done using a binary search; the source code
977 takes up less space and should be simpler to maintain. Merge the ACL
978 condition decode tables also, with similar effect.
980 JH/26 Fix problem with one_time used on a redirect router which returned the
981 parent address unchanged. A retry would see the parent address marked as
982 delivered, so not attempt the (identical) child. As a result mail would
985 JH/27 Fix a possible security hole, wherein a process operating with the Exim
986 UID can gain a root shell. Credit to http://www.halfdog.net/ for
987 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
990 JH/28 Enable {spool,log} filesystem space and inode checks as default.
991 Main config options check_{log,spool}_{inodes,space} are now
992 100 inodes, 10MB unless set otherwise in the configuration.
994 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
995 Previously it only applied to the main-section connection policy
998 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1000 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1001 by me. Added RFC7919 DH primes as an alternative.
1003 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1004 are not in the system include path.
1006 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1007 GnuTLS, when a session startup failed (eg because the client disconnected)
1008 Exim did stdio operations after fclose. This was exposed by a recent
1009 change which nulled out the file handle after the fclose.
1011 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1012 signed directly by the cert-signing cert, rather than an intermediate
1013 OCSP-signing cert. This is the model used by LetsEncrypt.
1015 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1017 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1018 an incoming connection.
1020 HS/02 Bug 1802: Do not half-close the connection after sending a request
1023 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1024 fallback to "prime256v1".
1026 JH/34 SECURITY: Use proper copy of DATA command in error message.
1027 Could leak key material. Remotely exploitable. CVE-2016-9963.
1033 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1034 and 3.4.4 - once the server is enabled to respond to an OCSP request
1035 it does even when not requested, resulting in a stapling non-aware
1036 client dropping the TLS connection.
1038 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1039 support variable-length bit vectors. No functional change.
1041 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1042 The I= interface field on outgoing lines is now after the H= remote
1043 host field, same as incoming lines. There is a separate
1044 outgoing_interface log selector which allows you to disable the
1047 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1048 If not running log_selector +smtp_connection the mainlog would be held
1049 open indefinitely after a "too many connections" event, including to a
1050 deleted file after a log rotate. Leave the per net connection logging
1051 leaving it open for efficiency as that will be quickly detected by the
1052 check on the next write.
1054 HS/01 Bug 1671: Fix post transport crash.
1055 Processing the wait-<transport> messages could crash the delivery
1056 process if the message IDs didn't exist for some reason. When
1057 using 'split_spool_directory=yes' the construction of the spool
1058 file name failed already, exposing the same netto behaviour.
1060 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1061 mime_regex ACL conditions.
1063 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1064 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1065 to HELO, local diagnostic string.
1067 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1068 log line to debug. Even when configured with a tls authenticator many
1069 client connections are expected to not authenticate in this way, so
1070 an authenticate fail is not an error.
1072 HS/02 Add the Exim version string to the process info. This way exiwhat
1073 gives some more detail about the running daemon.
1075 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1076 matter for fast-change records such as DNSBLs.
1078 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1079 retry record, even if constant. There may be multiple transports with
1080 different interface settings and the retry behaviour needs to be kept
1083 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1085 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1087 JH/10 Bug 840: fix log_defer_output option of pipe transport
1089 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1090 hosts_randomize. This matters a lot when combined with mua_wrapper.
1092 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1093 ${quote_pgsql:<string>} operator.
1095 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1097 JH/14 Change header file name for freeradius-client. Relevant if compiling
1098 with Radius support; from the Gentoo tree and checked under Fedora.
1100 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1102 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1103 option transport_filter, meaning no filtering.
1105 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1107 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1108 defaults to "*" (all hosts). The variable is now available when not built
1109 with TLS, default unset, mainly to enable keeping the testsuite sane.
1110 If a server certificate is not supplied (via tls_certificate) an error is
1111 logged, and clients will find TLS connections fail on startup. Presumably
1112 they will retry in-clear.
1113 Packagers of Exim are strongly encouraged to create a server certificate
1114 at installation time.
1116 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1117 with the $config_file variable.
1119 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1120 in transport context, after the attempt, and per-recipient. The latter type
1121 is per host attempted. The event data is the error message, and the errno
1122 information encodes the lookup type (A vs. MX) used for the (first) host,
1123 and the trailing two digits of the smtp 4xx response.
1125 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1126 to write to mainlog (or rejectlog, paniclog) in the window between file
1127 creation and permissions/ownership being changed. Particularly affects
1128 installations where exicyclog is run as root, rather than exim user;
1129 result is that the running daemon panics and dies.
1131 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1133 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1134 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1135 "pri" and "weight". Note that the previous implicit priority given by the
1136 list order is no longer honoured.
1138 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1139 for DKIM processing.
1141 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1142 by defining SUPPORT_SOCKS.
1144 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1145 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1146 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1147 variables are renamed to proxy_{local,external}_{address,port}.
1149 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1150 for a build by defining SUPPORT_I18N
1152 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1153 of the query string, and make ${quote_redis:} do that quoting.
1155 JH/29 Move Events support from Experimental to mainline, enabled by default
1156 and removable for a build by defining DISABLE_EVENT.
1158 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1160 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1161 cached by the daemon.
1163 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1164 by defining LOOKUP_REDIS. The libhiredis library is required.
1166 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1167 keys are given for lookup.
1169 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1170 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1171 only supported when built with TLS support. The PolarSSL SHA routines
1172 are still used when the TLS library is too old for convenient support.
1174 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1175 openssl_options), for security. OpenSSL forces this from version 1.1.0
1176 server-side so match that on older versions.
1178 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1179 allocation for $value could be released as the expansion processing
1180 concluded, but leaving the global pointer active for it.
1182 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1183 and to use the domains and local_parts ACL conditions.
1185 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1186 incorrectly not doubled on cutthrough transmission, hence seen as a
1187 body-termination at the receiving system - resulting in truncated mails.
1188 Commonly the sender saw a TCP-level error, and retransmitted the message
1189 via the normal store-and-forward channel. This could result in duplicates
1190 received - but deduplicating mailstores were liable to retain only the
1191 initial truncated version.
1193 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1195 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1197 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1198 we're in there, support oversigning also; bug 1309.
1200 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1202 HS/04 Add support for keep_environment and add_environment options.
1204 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1205 either intentional arithmetic overflow during PRNG, or testing config-
1208 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1209 delivery resulted in actual delivery. Cancel cutthrough before DATA
1212 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1213 rejects a recipient: pass the reject to the originator.
1215 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1216 Many were false-positives and ignorable, but it's worth fixing the
1219 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1220 for the new environment-manipulation done at startup. Move the routines
1221 from being local to tls.c to being global via the os.c file.
1223 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1224 an extract embedded as result-arg for a map, the first arg for extract
1225 is unavailable so we cannot tell if this is a numbered or keyed
1226 extraction. Accept either.
1232 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1235 JH/02 The smtp transport option "multi_domain" is now expanded.
1237 JH/03 The smtp transport now requests PRDR by default, if the server offers
1240 JH/04 Certificate name checking on server certificates, when exim is a client,
1241 is now done by default. The transport option tls_verify_cert_hostnames
1242 can be used to disable this per-host. The build option
1243 EXPERIMENTAL_CERTNAMES is withdrawn.
1245 JH/05 The value of the tls_verify_certificates smtp transport and main options
1246 default to the word "system" to access the system default CA bundle.
1247 For GnuTLS, only version 3.0.20 or later.
1249 JH/06 Verification of the server certificate for a TLS connection is now tried
1250 (but not required) by default. The verification status is now logged by
1251 default, for both outbound TLS and client-certificate supplying inbound
1254 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1257 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1258 Status Notification (bounce) messages are now MIME format per RFC 3464.
1259 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1260 under the control of the dsn_advertise_hosts option, and routers may
1261 have a dsn_lasthop option.
1263 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1264 default, modifiable by a malware= option. The list separator for
1265 the options can now be changed in the usual way. Bug 68.
1267 JH/10 The smtp_receive_timeout main option is now expanded before use.
1269 JH/11 The incoming_interface log option now also enables logging of the
1270 local interface on delivery outgoing connections.
1272 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1273 if the interface and destination host and port all match.
1275 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1278 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1279 Patch from Andrew Lewis.
1281 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1282 now supports optional time-restrictions, weighting, and priority
1283 modifiers per server. Patch originally by <rommer@active.by>.
1285 JH/16 The spamd_address main option now supports a mixed list of local
1286 and remote servers. Remote servers can be IPv6 addresses, and
1287 specify a port-range.
1289 JH/17 Bug 68: The spamd_address main option now supports an optional
1290 timeout value per server.
1292 JH/18 Bug 1581: Router and transport options headers_add/remove can
1293 now have the list separator specified.
1295 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1298 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1301 JH/21 Support for the A6 type of dns record is withdrawn.
1303 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1304 rather than the verbs used.
1306 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1307 from 255 to 1024 chars.
1309 JH/24 Verification callouts now attempt to use TLS by default.
1311 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1312 are generic router options now. The defaults didn't change.
1314 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1315 Original patch from Alexander Shikoff, worked over by JH.
1317 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1318 files if ZCAT_COMMAND is not executable.
1320 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1322 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1324 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1325 Normally benign, it bites when the pair was led to by a CNAME;
1326 modern usage is to not canonicalize the domain to a CNAME target
1327 (and we were inconsistent anyway for A-only vs AAAA+A).
1329 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1331 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1332 when evaluating $sender_host_dnssec.
1334 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1335 $sender_helo_dnssec variable.
1337 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1339 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1341 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1343 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1344 documented as working, but never had. Support all but $spam_report.
1346 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1347 added for tls authenticator.
1349 HS/03 Add perl_taintmode main config option
1355 TL/01 When running the test suite, the README says that variables such as
1356 no_msglog_check are global and can be placed anywhere in a specific
1357 test's script, however it was observed that placement needed to be near
1358 the beginning for it to behave that way. Changed the runtest perl
1359 script to read through the entire script once to detect and set these
1360 variables, reset to the beginning of the script, and then run through
1361 the script parsing/test process like normal.
1363 TL/02 The BSD's have an arc4random API. One of the functions to induce
1364 adding randomness was arc4random_stir(), but it has been removed in
1365 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1366 function when detected.
1368 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1369 cause callback expansion.
1371 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1372 syntax errors in an expansion can be treated as a string instead of
1373 logging or causing an error, due to the internal use of bool_lax
1374 instead of bool when processing it.
1376 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1377 server certificates when making smtp deliveries.
1379 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1381 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1383 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1385 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1386 Merged patch from Sebastian Wiedenroth.
1388 JH/05 Fix results-pipe from transport process. Several recipients, combined
1389 with certificate use, exposed issues where response data items split
1390 over buffer boundaries were not parsed properly. This eventually
1391 resulted in duplicates being sent. This issue only became common enough
1392 to notice due to the introduction of connection certificate information,
1393 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1395 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1396 size buffer was used, resulting in syntax errors when an expansion
1399 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1400 version 3.3.6 or later.
1402 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1403 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1404 both become "event_action", the variables become $event_name, $event_data
1405 and $event_defer_errno. There is a new variable $verify_mode, usable in
1406 routers, transports and related events. The tls:cert event is now also
1407 raised for inbound connections, if the main configuration event_action
1410 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1411 early OCSP support, but no stapling (appears to be less than 1.0.0).
1413 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1414 server certificate names available under the smtp transport option
1415 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1418 JH/10 Time-related extraction expansions from certificates now use the main
1419 option "timezone" setting for output formatting, and are consistent
1420 between OpenSSL and GnuTLS compilations. Bug 1541.
1422 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1423 encoded parameter in the incoming message. Bug 1558.
1425 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1426 include certificate info, eximon was claiming there were spoolfile
1429 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1431 JH/14 Log delivery-related information more consistently, using the sequence
1432 "H=<name> [<ip>]" wherever possible.
1434 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1435 are problematic for Debian distribution, omit them from the release
1438 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1440 JH/16 Fix string representation of time values on 64bit time_t architectures.
1443 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1444 output list separator was used.
1449 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1450 checkers that were complaining about end of non-void function with no
1453 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1454 This was a regression introduced in 4.83 by another bugfix.
1456 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1458 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1459 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1465 TF/01 Correctly close the server side of TLS when forking for delivery.
1467 When a message was received over SMTP with TLS, Exim failed to clear up
1468 the incoming connection properly after forking off the child process to
1469 deliver the message. In some situations the subsequent outgoing
1470 delivery connection happened to have the same fd number as the incoming
1471 connection previously had. Exim would try to use TLS and fail, logging
1472 a "Bad file descriptor" error.
1474 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1475 utilities have not been installed.
1477 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1478 temporary space as the ACL may create new global variables.
1480 TL/01 LDAP support uses per connection or global context settings, depending
1481 upon the detected version of the libraries at build time.
1483 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1484 to extract and use the src ip:port in logging and expansions as if it
1485 were a direct connection from the outside internet. PPv2 support was
1486 updated based on HAProxy spec change in May 2014.
1488 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1490 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1491 Properly escape header and check for NULL return.
1493 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1496 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1498 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1499 characters in header names, implemented as a verify condition.
1500 Contributed by Michael Fischer v. Mollard.
1502 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1503 results permerror and temperror. Previous values are deprecated but
1504 still accepted. In a future release, err_perm and err_temp will be
1505 completely removed, which will be a backward incompatibility if the
1506 ACL tests for either of these two old results. Patch contributed by
1507 user bes-internal on the mailing list.
1509 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1511 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1512 selectors, in both main and reject logs.
1514 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1517 JH/07 Add malware type "sock" for talking to simple daemon.
1519 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1521 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1522 routers/transports under cutthrough routing.
1524 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1525 numbers. Touch up "bool" conditional to keep the same definition.
1527 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1529 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1531 JH/12 Expand items in router/transport headers_add or headers_remove lists
1532 individually rather than the list as a whole. Bug 1452.
1534 Required for reasonable handling of multiple headers_ options when
1535 they may be empty; requires that headers_remove items with embedded
1536 colons must have them doubled (or the list-separator changed).
1538 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1539 view the policy declared in the DMARC record. Currently, $dmarc_status
1540 is a combined value of both the record presence and the result of the
1543 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1545 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1546 dnslookup router and the smtp transport (applying to the forward
1549 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1550 of ldap servers used for a specific lookup. Patch provided by Heiko
1553 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1554 New variable $lookup_dnssec_authenticated for observability.
1556 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1557 Patch submitted by Lars Timman.
1559 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1561 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1562 Requires trusted mode and valid format message id, aborts otherwise.
1563 Patch contributed by Heiko Schlichting.
1565 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1566 certextract with support for various fields. Bug 1358.
1568 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1569 is requested by default, modifiable by smtp transport option
1572 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1573 operate on certificate variables to give certificate fingerprints
1574 Also new ${sha256:cert_variable}.
1576 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1578 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1579 Christian Aistleitner.
1581 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1583 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1584 file. Patch from Wolfgang Breyha.
1586 JH/25 Expand the coverage of the delivery $host and $host_address to
1587 client authenticators run in verify callout. Bug 1476.
1589 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1590 align with daemon_smtp_ports. Bug 72.
1592 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1593 support and error reporting did not work properly.
1595 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1596 and is readable. Patch from Andrew Colin Kissa.
1598 TL/14 Enhance documentation of ${run expansion and how it parses the
1599 commandline after expansion, particularly in the case when an
1600 unquoted variable expansion results in an empty value.
1602 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1604 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1605 by renaming away from it. Addresses GH issue 15, reported by
1608 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1610 TL/15 SECURITY: prevent double expansion in math comparison functions
1611 (can expand unsanitized data). Not remotely exploitable.
1618 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1620 PP/02 Make -n do something, by making it not do something.
1621 When combined with -bP, the name of an option is not output.
1623 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1626 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1627 $sender_host_name and config options to manage this, and basic check
1630 PP/05 DSCP support for outbound connections and control modifier for inbound.
1632 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1633 (Only plugin which currently uses this is kerberos4, which nobody should
1634 be using, but we should make it available and other future plugins might
1635 conceivably use it, even though it would break NAT; stuff *should* be
1636 using channel bindings instead).
1638 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1639 name; added for Sendmail compatibility; requires admin caller.
1640 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1641 just ignore it); requires trusted caller.
1642 Also parse but ignore: -Ac -Am -X<logfile>
1645 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1647 TL/02 Add +smtp_confirmation as a default logging option.
1649 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1650 Patch by Magnus Holmgren from 2007-02-20.
1652 TL/04 Bugzilla 1281 - Spec typo.
1653 Bugzilla 1283 - Spec typo.
1654 Bugzilla 1290 - Spec grammar fixes.
1656 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1658 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1660 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1661 mailing list by by Dmitry Isaikin.
1663 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1665 JH/02 Support "G" suffix to numbers in ${if comparisons.
1667 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1669 NM/01 Bugzilla 1197 - Spec typo
1670 Bugzilla 1196 - Spec examples corrections
1672 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1674 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1675 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1678 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1679 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1681 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1682 "acl {{name}{arg}...}", and optional args on acl condition
1685 JH/05 Permit multiple router/transport headers_add/remove lines.
1687 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1689 JH/07 Avoid using a waiting database for a single-message-only transport.
1690 Performance patch from Paul Fisher. Bugzilla 1262.
1692 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1695 JH/09 Add $headers_added variable, with content from use of ACL modifier
1696 add_header (but not yet added to the message). Bugzilla 199.
1698 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1699 Pulled from Bugzilla 817 by Wolfgang Breyha.
1701 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1703 (nb: this is the same fix as in Exim 4.80.1)
1705 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1708 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1711 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1713 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1714 advertise SMTP AUTH mechanism to us, instead of a generic
1715 protocol violation error. Also, make Exim more robust to bad
1716 data from the Dovecot auth socket.
1718 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1720 When a queue runner is handling a message, Exim first routes the
1721 recipient addresses, during which it prunes them based on the retry
1722 hints database. After that it attempts to deliver the message to
1723 any remaining recipients. It then updates the hints database using
1726 So if a recipient address works intermittently, it can get repeatedly
1727 deferred at routing time. The retry hints record remains fresh so the
1728 address never reaches the final cutoff time.
1730 This is a fairly common occurrence when a user is bumping up against
1731 their storage quota. Exim had some logic in its local delivery code
1732 to deal with this. However it did not apply to per-recipient defers
1733 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1735 This change adds a proper retry rule check during routing so that the
1736 final cutoff time is checked against the message's age. We only do
1737 this check if there is an address retry record and there is not a
1738 domain retry record; this implies that previous attempts to handle
1739 the address had the retry_use_local_parts option turned on. We use
1740 this as an approximation for the destination being like a local
1741 delivery, as in LMTP.
1743 I suspect this new check makes the old local delivery cutoff check
1744 redundant, but I have not verified this so I left the code in place.
1746 TF/02 Correct gecos expansion when From: is a prefix of the username.
1748 Test 0254 submits a message to Exim with the header
1752 When I ran the test suite under the user fanf2, Exim expanded
1753 the header to contain my full name, whereas it should have added
1754 a Resent-Sender: header. It erroneously treats any prefix of the
1755 username as equal to the username.
1757 This change corrects that bug.
1759 GF/01 DCC debug and logging tidyup
1760 Error conditions log to paniclog rather than rejectlog.
1761 Debug lines prefixed by "DCC: " to remove any ambiguity.
1763 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1765 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1766 Bug spotted by Jeremy Harris; was flawed since initial commit.
1767 Would have resulted in OCSP responses post-SNI triggering an Exim
1768 NULL dereference and crash.
1770 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1772 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1773 Bug detection, analysis and fix by Samuel Thibault.
1774 Bugzilla 1331, Debian bug #698092.
1776 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1778 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1779 Server implementation by Todd Lyons, client by JH.
1780 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1781 config variable "prdr_enable" controls whether the server
1782 advertises the facility. If the client requests PRDR a new
1783 acl_data_smtp_prdr ACL is called once for each recipient, after
1784 the body content is received and before the acl_smtp_data ACL.
1785 The client is controlled by both of: a hosts_try_prdr option
1786 on the smtp transport, and the server advertisement.
1787 Default client logging of deliveries and rejections involving
1788 PRDR are flagged with the string "PRDR".
1790 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1791 fclose(). Diagnosis by Todd Lyons.
1793 PP/17 Update configure.default to handle IPv6 localhost better.
1794 Patch by Alain Williams (plus minor tweaks).
1797 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1798 This is now consistent with GnuTLS, and is now documented: the
1799 previous undocumented portable approach to treating the option as
1800 unset was to force an expansion failure. That still works, and
1801 an empty string is now equivalent.
1803 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1804 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1805 not performing validation itself.
1807 PP/20 Added force_command boolean option to pipe transport.
1808 Patch from Nick Koston, of cPanel Inc.
1810 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1813 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1815 PP/21 Fix eximon continuous updating with timestamped log-files.
1816 Broken in a format-string cleanup in 4.80, missed when I repaired the
1817 other false fix of the same issue.
1818 Report and fix from Heiko Schlichting.
1821 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1822 Report from Prashanth Katuri.
1824 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1825 It's SecureTransport, so affects any MacOS clients which use the
1826 system-integrated TLS libraries, including email clients.
1828 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1829 using a MIME ACL for non-SMTP local injection.
1830 Report and assistance in diagnosis by Warren Baker.
1832 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1834 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1836 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1837 last id that failed so it may be referenced in subsequent ACL's.
1839 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1842 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1843 ldap library initialization, allowing self-signed CA's to be
1844 used. Also properly sets require_cert option later in code by
1845 using NULL (global ldap config) instead of ldap handle (per
1846 session). Bug diagnosis and testing by alxgomz.
1848 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1849 the src/util/ subdirectory.
1851 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1852 renamed to Transport Post Delivery Action by Jeremy Harris, as
1855 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1856 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1857 redis_servers = needs to be configured which will be used by the redis
1858 lookup. Patch from Warren Baker, of The Packet Hub.
1860 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1862 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1863 hostname or reverse DNS when processing a host list. Used suggestions
1864 from multiple comments on this bug.
1866 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1868 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1869 Missed a few lines, added it to make the runtest require no keyboard
1872 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1873 contains upper case chars. Make router use caseful_local_part.
1875 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1876 support when GnuTLS has been built with p11-kit.
1882 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1884 This, or similar/improved, will also be change PP/11 of 4.82.
1890 PP/01 Handle short writes when writing local log-files.
1891 In practice, only affects FreeBSD (8 onwards).
1892 Bugzilla 1053, with thanks to Dmitry Isaikin.
1894 NM/01 Bugzilla 949 - Documentation tweak
1896 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1899 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1901 PP/02 Implemented gsasl authenticator.
1903 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1905 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1906 `pkg-config foo` for cflags/libs.
1908 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1909 with rest of GSASL and with heimdal_gssapi.
1911 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1912 `pkg-config foo` for cflags/libs for the TLS implementation.
1914 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1915 properties get this fed in as external SSF. A number of robustness
1916 and debugging improvements to the cyrus_sasl authenticator.
1918 PP/08 cyrus_sasl server now expands the server_realm option.
1920 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1921 Patch by Jeremy Harris.
1923 PP/10 Added dbmjz lookup type.
1925 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1927 PP/12 MAIL args handles TAB as well as SP, for better interop with
1928 non-compliant senders.
1929 Analysis and variant patch by Todd Lyons.
1931 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1932 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1933 Patch from Dirk Mueller <dmueller@suse.com>
1935 PP/13 tls_peerdn now print-escaped for spool files.
1936 Observed some $tls_peerdn in wild which contained \n, which resulted
1937 in spool file corruption.
1939 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1940 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1941 or write after TLS renegotiation, which otherwise led to messages
1944 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1945 as a tracking header (ie: a signed header comes before the signature).
1946 Patch from Wolfgang Breyha.
1948 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1949 comma-sep list; embedded commas doubled.
1951 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1953 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1955 Report and patch from Dmitry Banschikov.
1957 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1958 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1959 failures. We appear to now support TLS1.1+ with Exim.
1961 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1962 lets Exim select keys and certificates based upon TLS SNI from client.
1963 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1964 before an outbound SMTP session. New log_selector, +tls_sni.
1966 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1967 NULL dereference. Report and patch from Alun Jones.
1969 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1970 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1971 Not seeing resolver debug output on NetBSD, but suspect this is a
1972 resolver implementation change.
1974 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1975 Left warnings. Added "eximon gdb" invocation mode.
1977 PP/21 Defaulting "accept_8bitmime" to true, not false.
1979 PP/22 Added -bw for inetd wait mode support.
1981 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1982 locate the relevant includes and libraries. Made this the default.
1984 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1985 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1987 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1988 This may cause build issues on older platforms.
1990 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1991 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1992 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1993 Added SNI support via GnuTLS too.
1994 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1996 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1998 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1999 Applied second patch from Janne, implementing suggestion to default
2000 multiple-strings-in-record handling to match SPF spec.
2002 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2004 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2005 read-only, out of scope).
2006 Patch from Wolfgang Breyha, report from Stuart Northfield.
2008 PP/29 Fix three issues highlighted by clang analyser static analysis.
2009 Only crash-plausible issue would require the Cambridge-specific
2010 iplookup router and a misconfiguration.
2011 Report from Marcin Mirosław.
2013 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2015 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2016 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2017 As part of this, removing so much warning spew let me fix some minor
2018 real issues in debug logging.
2020 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2021 assignment on my part. Fixed.
2023 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2024 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2025 Janne Snabb (who went above and beyond: thank you).
2027 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2028 string otherwise requires a connection and a bunch more work and it's
2029 relatively easy to get wrong. Should also expose TLS library linkage
2032 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2033 64-bit ${eval} (JH/03).
2035 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2036 GNU libc to support some of the 64-bit stuff, should not lead to
2037 conflicts. Defined before os.h is pulled in, so if a given platform
2038 needs to override this, it can.
2040 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2041 protection layer was required, which is not implemented.
2042 Bugzilla 1254, patch from Wolfgang Breyha.
2044 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2045 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2046 tls_dhparam take prime identifiers. Also unbreak combination of
2047 OpenSSL+DH_params+TLSSNI.
2049 PP/39 Disable SSLv2 by default in OpenSSL support.
2055 PP/01 Solaris build fix for Oracle's LDAP libraries.
2056 Bugzilla 1109, patch from Stephen Usher.
2058 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2060 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2063 TF/02 Fix a couple more cases where we did not log the error message
2064 when unlink() failed. See also change 4.74-TF/03.
2066 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2067 lock up or crash if it happened to be inside a call to libc when it
2068 got a SIGUSR1 from exiwhat.
2070 The SIGUSR1 handler appends the current process status to the process
2071 log which is later printed by exiwhat. It used to use the general
2072 purpose logging code to do this, but several functions it calls are
2073 not safe for signals.
2075 The new output code in the SIGUSR1 handler is specific to the process
2076 log, and simple enough that it's easy to inspect for signal safety.
2077 Removing some special cases also simplifies the general logging code.
2078 Removing the spurious timestamps from the process log simplifies
2081 TF/04 Improved ratelimit ACL condition.
2083 The /noupdate option has been deprecated in favour of /readonly which
2084 has clearer semantics. The /leaky, /strict, and /readonly update modes
2085 are mutually exclusive. The update mode is no longer included in the
2086 database key; it just determines when the database is updated. (This
2087 means that when you upgrade Exim will forget old rate measurements.)
2089 Exim now checks that the per_* options are used with an update mode that
2090 makes sense for the current ACL. For example, when Exim is processing a
2091 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2092 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2093 must specify per_mail/readonly. If you omit the update mode it defaults to
2094 /leaky where that makes sense (as before) or /readonly where required.
2096 The /noupdate option is now undocumented but still supported for
2097 backwards compatibility. It is equivalent to /readonly except that in
2098 ACLs where /readonly is required you may specify /leaky/noupdate or
2099 /strict/noupdate which are treated the same as /readonly.
2101 A useful new feature is the /count= option. This is a generalization
2102 of the per_byte option, so that you can measure the throughput of other
2103 aggregate values. For example, the per_byte option is now equivalent
2104 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2106 The per_rcpt option has been generalized using the /count= mechanism
2107 (though it's more complicated than the per_byte equivalence). When it is
2108 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2109 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2110 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2111 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2112 Note that using per_rcpt with a non-readonly update mode in more than
2113 one ACL will cause the recipients to be double-counted. (The per_mail
2114 and per_byte options don't have this problem.)
2116 The handling of very low rates has changed slightly. If the computed rate
2117 is less than the event's count (usually one) then this event is the first
2118 after a long gap. In this case the rate is set to the same as this event's
2119 count, so that the first message of a spam run is counted properly.
2121 The major new feature is a mechanism for counting the rate of unique
2122 events. The new per_addr option counts the number of different
2123 recipients that someone has sent messages to in the last time period. It
2124 behaves like per_rcpt if all the recipient addresses are different, but
2125 duplicate recipient addresses do not increase the measured rate. Like
2126 the /count= option this is a general mechanism, so the per_addr option
2127 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2128 example, measure the rate that a client uses different sender addresses
2129 with the options per_mail/unique=$sender_address. There are further
2130 details in the main documentation.
2132 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2134 TF/06 Removed a few PCRE remnants.
2136 TF/07 Automatically extract Exim's version number from tags in the git
2137 repository when doing development or release builds.
2139 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2140 Bugzilla 879. Patch from Paul Fisher.
2142 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2143 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2146 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2148 PP/05 Variable $av_failed, true if the AV scanner deferred.
2149 Bugzilla 1078. Patch from John Horne.
2151 PP/06 Stop make process more reliably on build failure.
2152 Bugzilla 1087. Patch from Heiko Schlittermann.
2154 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2155 Bugzilla 1089. Patch from Heiko Schlittermann.
2157 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2158 Bugzilla 1131. Patch from Holger Weiß.
2160 PP/09 Handle IPv6 addresses with SPF.
2161 Bugzilla 860. Patch from Wolfgang Breyha.
2163 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2165 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2168 PP/11 match_* no longer expand right-hand-side by default.
2169 New compile-time build option, EXPAND_LISTMATCH_RHS.
2170 New expansion conditions, "inlist", "inlisti".
2172 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2174 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2176 PP/14 fix log_write() format string regression from TF/03.
2177 Bugzilla 1152. Patch from Dmitry Isaikin.
2183 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2185 PP/02 Harmonised TLS library version reporting; only show if debugging.
2186 Layout now matches that introduced for other libraries in 4.74 PP/03.
2188 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2190 PP/04 New "dns_use_edns0" global option.
2192 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2195 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2196 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2198 TK/01 Updated PolarSSL code to 0.14.2.
2199 Bugzilla 1097. Patch from Andreas Metzler.
2201 PP/07 Catch divide-by-zero in ${eval:...}.
2202 Fixes bugzilla 1102.
2204 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2207 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2208 format-string attack -- SECURITY: remote arbitrary code execution.
2210 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2211 time unintentionally subject to list matching rules, letting the header
2212 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2213 arbitrary string expansion). This allowed for information disclosure.
2215 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2216 INT_MIN/-1 -- value coerced to INT_MAX.
2222 NM/01 Workaround for PCRE version dependency in version reporting
2225 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2226 This fixes portability to compilers other than gcc, notably
2227 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2229 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2230 makefiles for portability to HP-UX and POSIX correctness.
2232 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2233 Also via indented variable definition in the Makefile.
2234 (Debugging by Oliver Heesakkers).
2236 PP/02 Restore caching of spamd results with expanded spamd_address.
2237 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2239 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2240 Improves build reliability. Fix from: Frank Elsner
2242 NM/02 Fix wide character breakage in the rfc2047 coding
2243 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2245 NM/03 Allow underscore in dnslist lookups
2246 Fixes bug 1026. Patch from Graeme Fowler
2248 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2249 Code patches from Adam Ciarcinski of NetBSD.
2251 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2254 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2255 is logged, to avoid truncation. Patch from John Horne.
2257 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2258 Patch from Jakob Hirsch.
2260 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2261 SQL string expansion failure details.
2262 Patch from Andrey Oktyabrski.
2264 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2265 Patch from Simon Arlott.
2267 PP/09 New lookups functionality failed to compile on old gcc which rejects
2268 extern declarations in function scope.
2269 Patch from Oliver Fleischmann
2271 PP/10 Use sig_atomic_t for flags set from signal handlers.
2272 Check getgroups() return and improve debugging.
2273 Fixed developed for diagnosis in bug 927 (which turned out to be
2276 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2277 Patch from Mark Zealey.
2279 PP/12 Bugzilla 1056: Improved spamd server selection.
2280 Patch from Mark Zealey.
2282 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2283 Based on patch from Heiko Schlittermann.
2285 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2286 Patch from Uwe Doering, sign-off by Michael Haardt.
2288 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2289 variable declaration deep within a block. Bug and patch from
2292 PP/15 lookups-Makefile IRIX compatibility coercion.
2294 PP/16 Make DISABLE_DKIM build knob functional.
2296 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2297 Patch by Simon Arlott
2299 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2300 variable argument macros. Our copy now differs from upstream.
2306 TF/01 Failure to get a lock on a hints database can have serious
2307 consequences so log it to the panic log.
2309 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2310 controlled using the smtp_confirmation log selector.
2312 TF/03 Include the error message when we fail to unlink a spool file.
2314 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2315 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2316 for maintaining out-of-tree patches for some time.
2318 PP/01 Bugzilla 139: Documentation and portability issues.
2319 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2320 Handle per-OS dynamic-module compilation flags.
2322 PP/02 Let /dev/null have normal permissions.
2323 The 4.73 fixes were a little too stringent and complained about the
2324 permissions on /dev/null. Exempt it from some checks.
2325 Reported by Andreas M. Kirchwitz.
2327 PP/03 Report version information for many libraries, including
2328 Exim version information for dynamically loaded libraries. Created
2329 version.h, now support a version extension string for distributors
2330 who patch heavily. Dynamic module ABI change.
2332 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2333 privilege escalation vulnerability whereby the Exim run-time user
2334 can cause root to append content of the attacker's choosing to
2337 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2340 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2341 If dropping privileges for untrusted macros, we disabled normal logging
2342 on the basis that it would fail; for the Exim run-time user, this is not
2343 the case, and it resulted in successful deliveries going unlogged.
2344 Fixed. Reported by Andreas Metzler.
2350 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2351 only prepend for the Resent-* case. Fixes regression introduced in
2352 Exim 4.70 by NM/22 for Bugzilla 607.
2354 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2355 increasing numbers of administrators be bitten by this.
2357 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2359 PP/03 Bugzilla 994: added openssl_options main configuration option.
2361 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2363 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2365 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2367 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2368 without a peer certificate, leading to a segfault because of an
2369 assumption that peers always have certificates. Be a little more
2370 paranoid. Problem reported by Martin Tscholak.
2372 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2373 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2374 NB: ClamAV planning to remove STREAM in "middle of 2010".
2375 CL also introduces -bmalware, various -d+acl logging additions and
2376 more caution in buffer sizes.
2378 PP/09 Implemented reverse_ip expansion operator.
2380 PP/10 Bugzilla 937: provide a "debug" ACL control.
2382 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2384 PP/12 Bugzilla 973: Implement --version.
2386 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2388 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2390 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2392 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2393 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2394 ignore trailing whitespace.
2396 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2398 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2401 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2402 Notification from Dr Andrew Aitchison.
2404 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2405 ExtendedDetectionInfo response format.
2406 Notification from John Horne.
2408 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2411 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2412 XSL and documented dependency on system catalogs, with examples of how
2415 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2418 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2419 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2420 configuration file which is writeable by the Exim user or group.
2422 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2423 of configuration files to cover files specified with the -C option if
2424 they are going to be used with root privileges, not just the default
2427 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2428 option (effectively making it always true).
2430 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2431 files to be used while preserving root privileges.
2433 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2434 that rogue child processes cannot use them.
2436 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2437 run-time user, instead of root.
2439 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2440 Exim run-time user without dropping privileges.
2442 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2443 result string, instead of calling string_vformat() twice with the same
2446 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2447 for other users. Others should always drop root privileges if they use
2448 -C on the command line, even for a whitelisted configure file.
2450 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2452 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2458 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2459 $data_path, and $header_path variables; fixed documentation bugs and
2462 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2463 exipick to access non-standard spools, including the "frozen" queue
2466 NM/01 Bugzilla 965: Support mysql stored procedures.
2467 Patch from Alain Williams
2469 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2471 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2472 Patch from Andreas Metzler
2474 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2475 Patch from Kirill Miazine
2477 NM/05 Bugzilla 671: Added umask to procmail example.
2479 JJ/03 installed exipick 20100323.0, fixing doc bug
2481 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2482 directory. Notification and patch from Dan Rosenberg.
2484 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2486 TK/02 Improve log output when DKIM signing operation fails.
2488 MH/01 Treat the transport option dkim_domain as a colon separated
2489 list, not as a single string, and sign the message with each element,
2490 omitting multiple occurences of the same signer.
2492 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2493 Bugzilla 985, 986. Patch by Simon Arlott
2495 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2496 Patch by Simon Arlott
2498 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2499 MBX locking. Notification from Dan Rosenberg.
2505 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2507 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2509 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2511 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2513 NM/04 Bugzilla 915: Flag broken perl installation during build.
2519 TK/01 Added patch by Johannes Berg that expands the main option
2520 "spamd_address" if it starts with a dollar sign.
2522 TK/02 Write list of recipients to X-Envelope-Sender header when building
2523 the mbox-format spool file for content scanning (suggested by Jakob
2526 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2527 (http://www.dcc-servers.net/) support via dccifd. Activated by
2528 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2530 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2531 by Mark Daniel Reidel <mr@df.eu>.
2533 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2534 When building exim an external PCRE library is now needed -
2535 PCRE is a system library on the majority of modern systems.
2536 See entry on PCRE_LIBS in EDITME file.
2538 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2539 conversation. Added nologin parameter to request.
2540 Patch contributed by Kirill Miazine.
2542 TF/01 Do not log submission mode rewrites if they do not change the address.
2544 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2546 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2547 log files in place. Contributed by Roberto Lima.
2549 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2551 TF/03 Bugzilla 615: When checking the local_parts router precondition
2552 after a local_part_suffix or local_part_prefix option, Exim now
2553 does not use the address's named list lookup cache, since this
2554 contains cached lookups for the whole local part.
2556 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2557 Robert Millan. Documentation is in experimental-spec.txt.
2559 TF/04 Bugzilla 668: Fix parallel build (make -j).
2561 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2563 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2564 Patch provided by Jan Srzednicki.
2566 TF/05 Leading white space used to be stripped from $spam_report which
2567 wrecked the formatting. Now it is preserved.
2569 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2570 that they are available at delivery time.
2572 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2574 TF/08 TLS error reporting now respects the incoming_interface and
2575 incoming_port log selectors.
2577 TF/09 Produce a more useful error message if an SMTP transport's hosts
2578 setting expands to an empty string.
2580 NM/06 Bugzilla 744: EXPN did not work under TLS.
2581 Patch provided by Phil Pennock.
2583 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2584 Patch provided by Richard Godbee.
2586 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2587 acl_smtp_notquit, added index entry.
2589 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2590 Patch provided by Eugene Bujak.
2592 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2593 accept(). Patch provided by Maxim Dounin.
2595 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2596 Patch provided by Phil Pennock.
2598 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2600 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2601 Patch provided by Brad "anomie" Jorsch.
2603 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2604 Patch provided by Dean Brooks.
2606 TK/05 Add native DKIM support (does not depend on external libraries).
2608 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2609 Patch provided by Graeme Fowler.
2611 NM/16 Bugzilla 851: Documentation example syntax fix.
2613 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2615 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2618 NM/19 Bugzilla 745: TLS version reporting.
2619 Patch provided by Phil Pennock.
2621 NM/20 Bugzilla 167: bool: condition support.
2622 Patch provided by Phil Pennock.
2624 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2625 clients. Patch provided by Phil Pennock.
2627 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2628 Patch provided by Brad "anomie" Jorsch.
2630 NM/23 Bugzilla 687: Fix misparses in eximstats.
2631 Patch provided by Heiko Schlittermann.
2633 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2634 Patch provided by Heiko Schlittermann.
2636 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2637 plus update to original patch.
2639 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2641 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2642 Patch provided by David Brownlee.
2644 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2646 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2648 NM/30 Bugzilla 888: TLS documentation bugfixes.
2650 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2652 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2653 Unlike the original bugzilla I have changed all shell scripts in src tree.
2655 NM/33 Bugzilla 898: Transport filter timeout fix.
2656 Patch by Todd Rinaldo.
2658 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2659 Patch by Serge Demonchaux.
2661 NM/35 Bugzilla 39: Base64 decode bug fixes.
2662 Patch by Jakob Hirsch.
2664 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2666 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2668 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2670 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2676 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2677 ALT-N's libdkim that I have put here:
2678 http://duncanthrax.net/exim-experimental/
2680 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2681 were called 'true' and it seems that C99 defines that as a reserved
2682 keyword to be used with 'bool' variable types. That means you could
2683 not include C99-style headers which use bools without triggering
2684 build errors in sieve.c.
2686 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2687 as mailq or other aliases. Changed the --help handling significantly
2688 to do whats expected. exim_usage() emits usage/help information.
2690 SC/01 Added the -bylocaldomain option to eximstats.
2692 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2694 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2696 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2702 PH/01 Another patch from the Sieve maintainer.
2704 PH/02 When an IPv6 address is converted to a string for single-key lookup
2705 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2706 dots are used instead of colons so that keys in lsearch files need not
2707 contain colons. This was done some time before quoting was made available
2708 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2709 (notated using the quote facility) so as to distinguish them from IPv4
2710 keys. This meant that lookups for IP addresses in host lists did not work
2711 for iplsearch lookups.
2713 This has been fixed by arranging for IPv6 addresses to be expressed with
2714 colons if the lookup type is iplsearch. This is not incompatible, because
2715 previously such lookups could never work.
2717 The situation is now rather anomalous, since one *can* have colons in
2718 ordinary lsearch keys. However, making the change in all cases is
2719 incompatible and would probably break a number of configurations.
2721 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2724 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2725 conversion specification without a maximum field width, thereby enabling
2726 a rogue spamd server to cause a buffer overflow. While nobody in their
2727 right mind would setup Exim to query an untrusted spamd server, an
2728 attacker that gains access to a server running spamd could potentially
2729 exploit this vulnerability to run arbitrary code as the Exim user.
2731 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2732 $primary_hostname instead of what libspf2 thinks the hosts name is.
2734 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2735 a directory entry by the name of the lookup key. Previously, if a
2736 symlink pointed to a non-existing file or a file in a directory that
2737 Exim lacked permissions to read, a lookup for a key matching that
2738 symlink would fail. Now it is enough that a matching directory entry
2739 exists, symlink or not. (Bugzilla 503.)
2741 PH/03 The body_linecount and body_zerocount variables are now exported in the
2744 PH/04 Added the $dnslist_matched variable.
2746 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2747 This means they are set thereafter only if the connection becomes
2750 PH/06 Added the client_condition to authenticators so that some can be skipped
2751 by clients under certain conditions.
2753 PH/07 The error message for a badly-placed control=no_multiline_responses left
2754 "_responses" off the end of the name.
2756 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2758 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2759 (without spaces) instead of just copying the configuration text.
2761 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2763 PH/11 Added $max_received_linelength.
2765 PH/12 Added +ignore_defer and +include_defer to host lists.
2767 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2768 way in which PCRE > 7.0 is built.
2770 PH/14 Implemented queue_only_load_latch.
2772 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2773 MAIL command. The effect was to mangle the value on 64-bit systems.
2775 PH/16 Another patch from the Sieve maintainer.
2777 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2779 PH/18 If a system quota error occurred while trying to create the file for
2780 a maildir delivery, the message "Mailbox is full" was not appended to the
2781 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2782 only to a quota excession during the actual writing of the file.
2784 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2785 characters?) which causes problems in log lines. The DN values are now
2786 passed through string_printing() before being added to log lines.
2788 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2789 and InterBase are left for another time.)
2791 PH/21 Added message_body_newlines option.
2793 PH/22 Guard against possible overflow in moan_check_errorcopy().
2795 PH/23 POSIX allows open() to be a macro; guard against that.
2797 PH/24 If the recipient of an error message contained an @ in the local part
2798 (suitably quoted, of course), incorrect values were put in $domain and
2799 $local_part during the evaluation of errors_copy.
2805 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2806 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2809 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2810 issue a MAIL command.
2812 PH/02 In an ACL statement such as
2814 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2816 if a client was not listed at all, or was listed with a value other than
2817 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2818 the condition was not true (as it should be), so access was not denied.
2819 The bug was that the ! inversion was incorrectly passed on to the second
2820 item. This has been fixed.
2822 PH/03 Added additional dnslists conditions == and =& which are different from
2823 = and & when the dns lookup returns more than one IP address.
2825 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2826 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2828 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2829 FSYNC, which compiles an option called disable_fsync that allows for
2830 bypassing fsync(). The documentation is heavily laced with warnings.
2832 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2834 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2835 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2836 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2837 including adding "make clean"; (3) Added -fPIC when compiling the test
2838 dynamically loaded module, to get rid of a warning.
2840 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2841 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2842 = 0s. The bug is otherwise harmless.
2844 PH/07 There was a bug in the dovecot authenticator such that the value of
2845 $auth1 could be overwritten, and so not correctly preserved, after a
2846 successful authentication. This usually meant that the value preserved by
2847 the server_setid option was incorrect.
2849 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2851 PH/09 Installed PCRE release 7.0.
2853 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2854 run for batched SMTP input. It is now run at the start of every message
2855 in the batch. While fixing this I discovered that the process information
2856 (output by running exiwhat) was not always getting set for -bs and -bS
2857 input. This is fixed, and it now also says "batched" for BSMTP.
2859 PH/11 Added control=no_pipelining.
2861 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2862 patch, slightly modified), and move the expansion of helo_data till after
2863 the connection is made in the smtp transport (so it can use these
2866 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2868 PH/14 Added log_selector = +pid.
2870 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2872 PH/16 Add ${if forany and ${if forall.
2874 PH/17 Added dsn_from option to vary the From: line in DSNs.
2876 PH/18 Flush SMTP output before performing a callout, unless control =
2877 no_callout_flush is set.
2879 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2880 was true (the default) a successful delivery failed to delete the retry
2881 item, thus causing premature timeout of the address. The bug is now
2884 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2886 PH/21 Long custom messages for fakedefer and fakereject are now split up
2887 into multiline responses in the same way that messages for "deny" and
2888 other ACL rejections are.
2890 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2891 with slight modification.
2893 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2894 draft, changing the syntax and factoring some duplicate code".
2896 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2897 for deliveries of the second and subsequent messages over the same SMTP
2900 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2901 ${reduce, with only minor "tidies".
2903 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2905 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2906 expansion side effects.
2908 PH/27 When a message times out after an over-quota error from an Exim-imposed
2909 quota, the bounce message says "mailbox is full". This message was not
2910 being given when it was a system quota that was exceeded. It now should
2913 MH/03 Made $recipients available in local_scan(). local_scan() already has
2914 better access to the recipient list through recipients_list[], but
2915 $recipients can be useful in postmaster-provided expansion strings.
2917 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2918 in the case of a MAIL command with additional options following the
2919 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2920 were accidentally chopped off.
2922 PH/29 SMTP synchronization checks are implemented when a command is read -
2923 there is a check that no more input is waiting when there shouldn't be
2924 any. However, for some commands, a delay in an ACL can mean that it is
2925 some time before the response is written. In this time, more input might
2926 arrive, invalidly. So now there are extra checks after an ACL has run for
2927 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2928 pipelining has not been advertised.
2930 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2932 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2933 returned in the SMTP response when smtp_return_error_details was false.
2934 This has been fixed.
2936 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2937 instead of the C I/O that was originally supplied, because problems were
2938 reported on Solaris.
2940 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2941 Exim which did not show up earlier: it was assuming that a call to
2942 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2943 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2944 was a macro that became an assignment, so it seemed to work. This has
2945 changed to a proper function call with a void return, hence the compile
2946 error. Exim's code has been fixed.
2948 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2951 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2953 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2955 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2956 because it turns out to be too big or there is a timeout) there is no
2957 "Completed" line in the log. When some messages of this type were
2958 selected by exigrep, they were listed as "not completed". Others were
2959 picked up by some special patterns. I have improved the selection
2960 criteria to be more general.
2962 PH/38 The host_find_failed option in the manualroute router can now be set
2963 to "ignore", to completely ignore a host whose IP address cannot be
2964 found. If all hosts are ignored, the behaviour is controlled by the new
2965 host_all_ignored option.
2967 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2968 homing or because of multiple MX records with /mx) generated more than
2969 one IP address, and the following item turned out to be the local host,
2970 all the secondary addresses of the first item were incorrectly removed
2971 from the list, along with the local host and any following hosts (which
2972 is what is supposed to happen).
2974 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2975 whoever called Exim into the -H file. In the case of the daemon it was
2976 behaving confusingly. When first started, it used values for whoever
2977 started the daemon, but after a SIGHUP it used the Exim user (because it
2978 calls itself on a restart). I have changed the code so that it now always
2981 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2982 message are rejected with the same error (e.g. no authentication or bad
2983 sender address), and a DATA command is nevertheless sent (as can happen
2984 with PIPELINING or a stupid MUA), the error message that was given to the
2985 RCPT commands is included in the rejection of the DATA command. This is
2986 intended to be helpful for MUAs that show only the final error to their
2989 PH/42 Another patch from the Sieve maintainer.
2991 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2992 Eximstats - Fixed some broken HTML links and added missing column headers
2994 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2995 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2997 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2999 PH/43 Yet another patch from the Sieve maintainer.
3001 PH/44 I found a way to check for a TCP/IP connection going away before sending
3002 the response to the final '.' that terminates a message, but only in the
3003 case where the client has not sent further data following the '.'
3004 (unfortunately, this is allowed). However, in many cases there won't be
3005 any further data because there won't be any more messages to send. A call
3006 to select() can be used: if it shows that the input is "ready", there is
3007 either input waiting, or the socket has been closed. An attempt to read
3008 the next input character can distinguish the two cases. Previously, Exim
3009 would have sent an OK response which the client would never have see.
3010 This could lead to message repetition. This fix should cure that, at
3011 least in a lot of common cases.
3013 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3014 advertised in response to EHLO.
3020 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3021 fixed by 4.65/MH/01 (is this a record?) are fixed:
3023 (i) An empty string was always treated as zero by the numeric comparison
3024 operators. This behaviour has been restored.
3026 (ii) It is documented that the numeric comparison operators always treat
3027 their arguments as decimal numbers. This was broken in that numbers
3028 starting with 0 were being interpreted as octal.
3030 While fixing these problems I realized that there was another issue that
3031 hadn't been noticed. Values of message_size_limit (both the global option
3032 and the transport option) were treated as octal if they started with 0.
3033 The documentation was vague. These values are now always treated as
3034 decimal, and I will make that clear in the documentation.
3040 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3041 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3044 MH/01 Don't check that the operands of numeric comparison operators are
3045 integers when their expansion is in "skipping" mode (fixes bug
3046 introduced by 4.64-PH/07).
3048 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3049 child addresses, Exim now panics and dies. Previously, because the count
3050 is held in a short int, deliveries were likely to be lost. As such a
3051 large number of recipients for a single message is ridiculous
3052 (performance will be very, very poor), I have chosen to impose a limit
3053 rather than extend the field.
3059 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3060 leftover -K file (the existence of which was triggered by #402).
3061 While we were at it, introduced process PID as part of the -K
3062 filename. This should rule out race conditions when creating
3065 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3066 processing considerably. Previous code took too long for large mails,
3067 triggering a timeout which in turn triggers #401.
3069 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3070 in the DK code in transports.c. sendfile() is not really portable,
3071 hence the _LINUX specificness.
3073 TF/01 In the add_headers option to the mail command in an Exim filter,
3074 there was a bug that Exim would claim a syntax error in any
3075 header after the first one which had an odd number of characters
3078 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3079 callout verification, Exim cached a "reject" for the entire domain. This
3080 is correct for most verifications, but it is not correct for a recipient
3081 verification with use_sender or use_postmaster set, because in that case
3082 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3083 case of MAIL FROM:<> rejection from other early rejections (e.g.
3084 rejection of HELO). When verifying a recipient using a non-null MAIL
3085 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3086 Whatever the result of the callout, the value of the domain cache is
3087 left unchanged (for any other kind of callout, getting as far as trying
3088 RCPT means that the domain itself is ok).
3090 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3093 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3094 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3095 session, the daemon ignores ECONNECT errors and logs others; it now
3096 ignores EPIPE as well.
3098 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3099 (quoted-printable decoding).
3101 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3102 later the small subsequent patch to fix an introduced bug.
3104 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3106 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3108 PH/08 An error is now given if message_size_limit is specified negative.
3110 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3111 to be given (somewhat) arbitrary names.
3113 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3116 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3117 miscellaneous code fixes
3119 PH/10 Added the log_reject_target ACL modifier to specify where to log
3122 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3123 hostname. This is wrong, because it relates to the incoming message (and
3124 probably the interface on which it is arriving) and not to the outgoing
3125 callout (which could be using a different interface). This has been
3126 changed to use the value of the helo_data option from the smtp transport
3127 instead - this is what is used when a message is actually being sent. If
3128 there is no remote transport (possible with a router that sets up host
3129 addresses), $smtp_active_hostname is used.
3131 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3132 tweaks were necessary in order to get it to work (see also 21 below):
3133 (a) The code assumed that strncpy() returns a negative number on buffer
3134 overflow, which isn't the case. Replaced with Exim's string_format()
3136 (b) There were several signed/unsigned issues. I just did the minimum
3137 hacking in of casts. There is scope for a larger refactoring.
3138 (c) The code used strcasecmp() which is not a standard C function.
3139 Replaced with Exim's strcmpic() function.
3140 (d) The code set only $1; it now sets $auth1 as well.
3141 (e) A simple test gave the error "authentication client didn't specify
3142 service in request". It would seem that Dovecot has changed its
3143 interface. Fortunately there's a specification; I followed it and
3144 changed what the client sends and it appears to be working now.
3146 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3149 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3150 address A is aliased to B and C, where B exists and C does not. Without
3151 -v the output is "A verified" because verification stops after a
3152 successful redirection if more than one address is generated. However,
3153 with -v the child addresses are also verified. Exim was outputting "A
3154 failed to verify" and then showing the successful verification for C,
3155 with its parentage. It now outputs "B failed to verify", showing B's
3156 parentage before showing the successful verification of C.
3158 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3159 look up a TXT record in a specific list after matching in a combined
3162 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3163 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3164 they consult the DNS. I had assumed they would set it the way they
3165 wanted; and indeed my experiments on Linux seem to show that in some
3166 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3167 To be on the safe side, however, I have now made the interface to
3168 host_find_byname() similar to host_find_bydns(), with an argument
3169 containing the DNS resolver options. The host_find_byname() function now
3170 sets these options at its start, just as host_find_bydns() does. The smtp
3171 transport options dns_qualify_single and dns_search_parents are passed to
3172 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3173 of host_find_byname() use the default settings of RES_DEFNAMES
3174 (qualify_single) but not RES_DNSRCH (search_parents).
3176 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3177 spool_read_header() do less string testing, by means of a preliminary
3178 switch on the second character of optional "-foo" lines. (This is
3179 overdue, caused by the large number of possibilities that now exist.
3180 Originally there were few.) While I was there, I also converted the
3181 str(n)cmp tests so they don't re-test the leading "-" and the first
3182 character, in the hope this might squeeze out yet more improvement.
3184 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3185 flag allowing group syntax was set by the header_syntax check but not
3186 turned off, possible causing trouble later; (2) The flag was not being
3187 set at all for the header_verify test, causing "group"-style headers to
3188 be rejected. I have now set it in this case, and also caused header_
3189 verify to ignore an empty address taken from a group. While doing this, I
3190 came across some other cases where the code for allowing group syntax
3191 while scanning a header line wasn't quite right (mostly, not resetting
3192 the flag correctly in the right place). These bugs could have caused
3193 trouble for malformed header lines. I hope it is now all correct.
3195 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3196 with the "reply" argument non-NULL. The code, however (which originally
3197 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3198 but it didn't always do it. This confused somebody who was copying the
3199 code for some other use. I have removed all the tests.
3201 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3202 feature that was used to support insecure browsers during the U.S. crypto
3203 embargo. It requires special client support, and Exim is probably the
3204 only MTA that supported it -- and would never use it because real RSA is
3205 always available. This code has been removed, because it had the bad
3206 effect of slowing Exim down by computing (never used) parameters for the
3207 RSA_EXPORT functionality.
3209 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3210 authenticator to fail if there's a tab character in the incoming data
3211 (there should never be unless someone is messing about, as it's supposed
3212 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3213 if the connection is using TLS or if the remote IP is the same as the
3214 local IP, and the "valid-client-cert option" if a client certificate has
3217 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3218 authenticators. This can be used for authorization after authentication
3219 succeeds. (In the case of plaintext, it servers for both authentication
3222 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3223 if any retry times were supplied.
3225 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3226 connection, where there is no client IP address to check. In this
3227 situation, the verify now always succeeds.
3229 PH/25 Applied John Jetmore's -Mset patch.
3231 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3233 PH/27 In a string expansion for a processed (not raw) header when multiple
3234 headers of the same name were present, leading whitespace was being
3235 removed from all of them, but trailing whitespace was being removed only
3236 from the last one. Now trailing whitespace is removed from each header
3237 before concatenation. Completely empty headers in a concatenation (as
3238 before) are ignored.
3240 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3241 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3243 PH/29 [Removed. This was a change that I later backed out, and forgot to
3244 correct the ChangeLog entry (that I had efficiently created) before
3245 committing the later change.]
3247 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3248 address errors (4xx response to RCPT) over the same connection as other
3249 messages routed to the same hosts. Such deliveries are always "forced",
3250 so retry times are not inspected. This resulted in far too many retries
3251 for the affected addresses. The effect occurred only when there were more
3252 hosts than the hosts_max_try setting in the smtp transport when it had
3253 the 4xx errors. Those hosts that it had tried were not added to the list
3254 of hosts for which the message was waiting, so if all were tried, there
3255 was no problem. Two fixes have been applied:
3257 (i) If there are any address or message errors in an SMTP delivery, none
3258 of the hosts (tried or untried) are now added to the list of hosts
3259 for which the message is waiting, so the message should not be a
3260 candidate for sending over the same connection that was used for a
3261 successful delivery of some other message. This seems entirely
3262 reasonable: after all the message is NOT "waiting for some host".
3263 This is so "obvious" that I'm not sure why it wasn't done
3264 previously. Hope I haven't missed anything, but it can't do any
3265 harm, as the worst effect is to miss an optimization.
3267 (ii) If, despite (i), such a delivery is accidentally attempted, the
3268 routing retry time is respected, so at least it doesn't keep
3269 hammering the server.
3271 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3272 in ${readsocket because some servers need this prod.
3274 PH/32 Added some extra debug output when updating a wait-xxx database.
3276 PH/33 The hint "could be header name not terminated by colon", which has been
3277 given for certain expansion errors for a long time, was not being given
3278 for the ${if def:h_colon_omitted{... case.
3280 PH/34 The spec says: "With one important exception, whenever a domain list is
3281 being scanned, $domain contains the subject domain." There was at least
3282 one case where this was not true.
3284 PH/35 The error "getsockname() failed: connection reset by peer" was being
3285 written to the panic log as well as the main log, but it isn't really
3286 panic-worthy as it just means the connection died rather early on. I have
3287 removed the panic log writing for the ECONNRESET error when getsockname()
3290 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3291 runs only) independently of the message's sender address. This meant
3292 that, if the 4xx error was in fact related to the sender, a different
3293 message to the same recipient with a different sender could confuse
3294 things. In particular, this can happen when sending to a greylisting
3295 server, but other circumstances could also provoke similar problems.
3296 I have changed the default so that the retry time for these errors is now
3297 based a combination of the sender and recipient addresses. This change
3298 can be overridden by setting address_retry_include_sender=false in the
3301 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3302 remote server are returned as part of bounce messages. This was not
3303 happening for LMTP over a pipe (the lmtp transport), but now it is the
3304 same for both kinds of LMTP.
3306 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3307 in header lines that were in fact CNAMEs. This is no longer the case.
3309 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3310 and queue runs started by the daemon processed all messages. This has
3311 been fixed so that -R and -S can now usefully be given with -q<time>.
3313 PH/40 Import PCRE release 6.7 (fixes some bugs).
3315 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3317 PH/42 Give an error if -q is specified more than once.
3319 PH/43 Renamed the variables $interface_address and $interface_port as
3320 $received_ip_address and $received_port, to make it clear that these
3321 values apply to message reception, and not to the outgoing interface when
3322 a message is delivered. (The old names remain recognized, of course.)
3324 PH/44 There was no timeout on the connect() call when using a Unix domain
3325 socket in the ${readsocket expansion. There now is.
3327 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3328 be meaningful with "accept".
3330 SC/01 Eximstats V1.43
3331 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3333 SC/02 Eximstats V1.44
3334 Use a glob alias rather than an array ref in the generated
3335 parser. This improves both readability and performance.
3337 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3338 Collect SpamAssassin and rejection statistics.
3339 Don't display local sender or destination tables unless
3340 there is data to show.
3341 Added average volumes into the top table text output.
3343 SC/04 Eximstats V1.46
3344 Collect data on the number of addresses (recipients)
3345 as well as the number of messages.
3347 SC/05 Eximstats V1.47
3348 Added 'Message too big' to the list of mail rejection
3349 reasons (thanks to Marco Gaiarin).
3351 SC/06 Eximstats V1.48
3352 Mainlog lines which have GMT offsets and are too short to
3353 have a flag are now skipped.
3355 SC/07 Eximstats V1.49 (Alain Williams)
3356 Added the -emptyok flag.
3358 SC/08 Eximstats V1.50
3359 Fixes for obtaining the IP address from reject messages.
3361 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3362 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3363 whitespace changes from 4.64-PH/27
3365 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3368 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3369 are found, allow negative numbers in numeric criteria)
3371 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3373 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3374 to match changes made in 4.64-PH/43
3376 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3378 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3379 "domain" is actually an IP address, and force a failure. This locks out
3380 those revolvers/nameservers that support "A-for-A" lookups, in
3381 contravention of the specifications.
3383 PH/48 When a host name was looked up from an IP address, and the subsequent
3384 forward lookup of the name timed out, the host name was left in
3385 $sender_host_name, contrary to the specification.
3387 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3388 restricted to single-key lookups, Exim was not diagnosing an error if
3389 * or *@ was used with a query-style lookup.
3391 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3393 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3394 long ago, but noone interested enough thought of it. Let's just say that
3395 the "1.1" means that there are some new functions that weren't there at
3396 some point in the past.
3398 PH/51 Error processing for expansion failure of helo_data from an smtp
3399 transport during callout processing was broken.
3401 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3402 tested/used via the -bh/-bhc/-bs options.
3404 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3405 bug, fixed in subsequent PCRE releases).
3407 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3408 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3410 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3416 SC/01 Use a glob alias rather than an array ref in eximstats generated
3417 parser. This improves both readability and performance.
3419 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3420 Don't display local sender or destination tables in eximstats unless
3421 there is data to show.
3422 Added average volumes into the eximstats top table text output.
3424 SC/03 Collect data on the number of addresses (recipients) as well
3425 as the number of messages in eximstats.
3427 TF/01 Correct an error in the documentation for the redirect router. Exim
3428 does (usually) call initgroups() when daemonizing.
3430 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3431 with consistent privilege compared to when running as a daemon.
3433 TF/03 Note in the spec that $authenticated_id is not set for local
3434 submissions from trusted users.
3436 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3437 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3439 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3440 by adding some example configuration directives to the default
3441 configuration file. A little bit of work is required to uncomment the
3442 directives and define how usernames and passwords are checked, but
3443 there is now a framework to start from.
3445 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3446 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3447 without this. I don't know how relevant this is to other LDAP libraries.
3449 PH/02 Add the verb name to the "unknown ACL verb" error.
3451 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3453 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3455 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3456 directory not expanded when it should be if an expanded home directory
3457 was set for the address (which is overridden by the transport).
3459 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3462 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3463 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3464 because it is too late at that time, and has no effect.
3466 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3467 security issue with \' (bugzilla #107). I could not use the
3468 PQescapeStringConn() function, because it needs a PGconn value as one of
3471 PH/08 When testing addresses using -bt, indicate those final addresses that
3472 are duplicates that would not cause an additional delivery. At least one
3473 person was confused, thinking that -bt output corresponded to deliveries.
3474 (Suppressing duplicates isn't a good idea as you lose the information
3475 about possibly different redirections that led to the duplicates.)
3477 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3478 systems where poll() doesn't work, in particular OS X.
3480 PH/10 Added more information to debugging output for retry time not reached.
3482 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3483 operations in malware.c.
3485 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3488 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3489 syslog_duplication set false, log lines that would normally be written
3490 both the the main log and to the reject log were not written to syslog at
3493 PH/14 In the default configuration, change the use of "message" in ACL warn
3494 statements to "add_header".
3496 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3497 not followed by a command (e.g. "seen endif").
3499 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3500 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3503 PH/17 Added extra conditions to the default value of delay_warning_condition
3507 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3508 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3509 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3512 The Auto-Submitted: and various List- headers are standardised, whereas I
3513 don't think Precedence: ever was.
3515 PH/18 Refactored debugging code in route_finduser() to show more information,
3516 in particular, the error code if getpwnam() issues one.
3518 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3519 This is apparently needed in addition to the PH/07 change above to avoid
3520 any possible encoding problems.
3522 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3523 but not after initializing Perl.
3525 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3526 output them only if debugging. By default they are written stderr,
3527 apparently, which is not desirable.
3529 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3532 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3535 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3537 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3538 authenticated or an ident call has been made. Suppress the default
3539 values for $authenticated_id and $authenticated_sender (but permit -oMai
3540 and -oMas) when testing with -bh.
3542 PH/24 Re-jigged the order of the tests in the default configuration so that the
3543 tests for valid domains and recipients precede the DNS black list and CSA
3544 tests, on the grounds that those ones are more expensive.
3546 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3547 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3548 This bug exists in every version of Exim that I still have, right back to
3551 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3552 However, an attempt to turn on case-sensitivity in a regex key by
3553 including (?-i) didn't work because the subject string was already
3554 lowercased, and the effects were non-intuitive. It turns out that a
3555 one-line patch can be used to allow (?-i) to work as expected.
3561 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3562 other effects) broke the use of negated acl sub-conditions.
3564 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3567 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3568 "Deny" causes Exim to reject the incoming connection with a 554 error.
3569 Unfortunately, if there is a major crisis, such as a disk failure,
3570 tcp-wrappers gives "deny", whereas what one would like would be some
3571 kind of temporary error. A kludge has been added to help with this.
3572 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3573 554 error is used if errno is still zero or contains ENOENT (which occurs
3574 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3577 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3579 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3580 errors. Otherwise a message that provokes a temporary error (when other
3581 messages do not) can cause a whole host to time out.
3583 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3584 addresses were routed directly to files or pipes from a redirect router.
3585 File deliveries just didn't batch; pipe deliveries might have suffered
3588 PH/06 A failure to get a lock for a hints database would erroneously always say
3589 "Failed to get write lock", even when it was really a read lock.
3591 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3592 of 0600. This has been changed to use the value of the lockfile_mode
3593 option (which defaults to 0600).
3595 PH/08 Applied small patch from the Sieve maintainer.
3597 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3598 folder from quota calculations, a direct delivery into this folder messed
3599 up the contents of the maildirsize file. This was because the regex was
3600 used only to exclude .Trash (or whatever) when the size of the mailbox
3601 was calculated. There was no check that a delivery was happening into an
3602 excluded directory. This bug has been fixed by ignoring all quota
3603 processing for deliveries into excluded directories.
3605 PH/10 Added the maildirfolder_create_regex option to appendfile.
3611 PH/01 The code for finding all the local interface addresses on a FreeBSD
3612 system running IPv6 was broken. This may well have applied to all BSD
3613 systems, as well as to others that have similar system calls. The broken
3614 code found IPv4 interfaces correctly, but gave incorrect values for the
3615 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3616 that it would not match correctly against @[] and not recognize the IPv6
3619 PH/02 The ipliteral router was not recognizing addresses of the form user@
3620 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3622 PH/03 Added disable_ipv6.
3624 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3625 decoded form, because it is most often used to construct To: headers
3626 lines in autoreplies, and the decoded form may well be syntactically
3627 invalid. However, $reply_address has leading white space removed, and all
3628 newlines turned into spaces so that the autoreply transport does not
3631 PH/05 If group was specified without a user on a router, and no group or user
3632 was specified on a transport, the group from the router was ignored.
3634 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3635 for visible compile-time settings that can be used to change these
3636 numbers, for those that want even more. Backwards compatibility with old
3637 spool files has been maintained. However, going back to a previous Exim
3638 release will lost any variables that are in spool files.
3640 PH/07 Two small changes when running in the test harness: increase delay when
3641 passing a TCP/IP connection to a new process, in case the original
3642 process has to generate a bounce, and remove special handling of
3643 127.0.0.2 (sic), which is no longer necessary.
3645 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3646 be the same on different OS.
3648 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3651 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3652 whether --show-vars was specified or not
3654 JJ/02 exipick: Added support for new ACL variable spool format introduced
3657 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3658 syntactically invalid From: or Reply-to: line, and a filter used this to
3659 generate an autoreply, and therefore failed to obtain an address for the
3660 autoreply, Exim could try to deliver to a non-existent relative file
3661 name, causing unrelated and misleading errors. What now happens is that
3662 it logs this as a hard delivery error, but does not attempt to create a
3665 PH/11 The exinext utility has a -C option for testing purposes, but although
3666 the given file was scanned by exinext itself; it wasn't being passed on
3667 when Exim was called.
3669 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3670 an end-of-file indication when reading a command response.
3672 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3673 compiled. In many other places in Exim, IPv6 addresses are always
3674 recognized, so I have changed this. It also means that IPv4 domain
3675 literals of the form [IPV4:n.n.n.n] are now always recognized.
3677 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3678 used if the router is not running as root, for example, when verifying at
3679 ACL time, or when using -bh. The debugging output from this situation was
3680 non-existent - all you got was a failure to exec. I have made two
3683 (a) Failures to set uid/gid, the current directory, or a process leader
3684 in a subprocess such as that created by queryprogram now generate
3685 suitable debugging output when -d is set.
3687 (b) The queryprogram router detects when it is not running as root,
3688 outputs suitable debugging information if -d is set, and then runs
3689 the subprocess without attempting to change uid/gid.
3691 PH/15 Minor change to Makefile for building test_host (undocumented testing
3694 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3695 additional section of a DNS packet that returns MX or SRV records.
3696 Instead, it always explicitly searches for A/AAAA records. This avoids
3697 major problems that occur when a DNS server includes only records of one
3698 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3699 fixed another bug: if SRV records were looked up and the corresponding
3700 address records were *not* found in the additional section, the port
3701 values from the SRV records were lost.
3703 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3704 using the correct key (the original address) when searching the retry
3705 rules in order to find which one to use for generating the retry hint.
3707 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3708 adding the default one. Similarly, if it contains a Reply-To: header, the
3709 errors_reply_to option, if set, is not used.
3711 PH/19 When calculating a retry time, Exim used to measure the "time since
3712 failure" by looking at the "first failed" field in the retry record. Now
3713 it does not use this if it is later than than the arrival time of the
3714 message. Instead it uses the arrival time. This makes for better
3715 behaviour in cases where some deliveries succeed, thus re-setting the
3716 "first failed" field. An example is a quota failure for a huge message
3717 when small messages continue to be delivered. Without this change, the
3718 "time since failure" will always be short, possible causing more frequent
3719 delivery attempts for the huge message than are intended.
3720 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3722 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3723 $1, $2, $3) because the numerical variables can be reset during some
3724 expansion items (e.g. "match"), thereby losing the authentication data.
3726 PH/21 Make -bV show the size of off_t variables so that the test suite can
3727 decide whether to run tests for quotas > 2G.
3729 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3730 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3731 filecount value is greater than 2G or if a quota value is greater than 2G
3732 on a system where the size of off_t is not greater than 4, a panic error
3735 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3736 never match. The debug and -bh output now contains an explicit error
3737 message indicating a malformed IPv4 address or mask.
3739 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3740 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3741 PH/23 above applies.
3743 PH/25 Do not write to syslog when running in the test harness. The only
3744 occasion when this arises is a failure to open the main or panic logs
3745 (for which there is an explicit test).
3747 PH/26 Added the /no_tell option to "control=freeze".
3749 PH/27 If a host name lookup failed very early in a connection, for example, if
3750 the IP address matched host_lookup and the reverse lookup yielded a name
3751 that did not have a forward lookup, an error message of the form "no IP
3752 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3753 could be logged. Now it outputs the IP address instead of "NULL".
3755 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3756 allows the sender and the authenticated sender to be set when
3757 submitting a message from within Exim. Since child_open_exim() is
3758 documented for local_scan(), the new function should be too.
3760 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3761 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3762 results in an empty string is now treated as unset.
3764 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3766 PH/31 Added sender_verify_fail logging option.
3768 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3769 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3770 tidied the source and removed it altogether.
3772 PH/33 When a queue run was abandoned because the load average was too high, a
3773 log line was always written; now it is written only if the queue_run log
3774 selector is set. In addition, the log line for abandonment now contains
3775 information about the queue run such as the pid. This is always present
3776 in "start" and "stop" lines but was omitted from the "abandon" line.
3778 PH/34 Omit spaces between a header name and the colon in the error message that
3779 is given when verify = headers_syntax fails (if there are lots of them,
3780 the message gets confusing).
3782 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3783 names, as there are now some PTR records that contain slashes. This check
3784 is only to protect against broken name servers that fall over on strange
3785 characters, so the fact that it applies to all lookups doesn't matter.
3787 PH/36 Now that the new test suite is complete, we can remove some of the
3788 special code in Exim that was needed for the old test suite. For example,
3789 sorting DNS records because real resolvers return them in an arbitrary
3790 order. The new test suite's fake resolver always returns records in the
3793 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3794 bounces) except when queue_only is set, to avoid logging races between
3795 the different processes.
3797 PH/38 Panic-die if .include specifies a non-absolute path.
3799 PH/39 A tweak to the "H" retry rule from its user.
3801 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3802 a label. They prevented compilation on older perls.
3804 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3805 a warning to be raised on newish perls.
3807 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3808 on queue. Changes to match documented behaviour of showing count of
3809 messages matching specified criteria.
3811 PH/40 Changed the default ident timeout from 30s to 5s.
3813 PH/41 Added support for the use of login_cap features, on those BSD systems
3814 that have them, for controlling the resources used by pipe deliveries.
3816 PH/42 The content-scanning code uses fopen() to create files in which to put
3817 message data. Previously it was not paying any attention to the mode of
3818 the files. Exim runs with umask(0) because the rest of the code creates
3819 files with open(), and sets the required mode explicitly. Thus, these
3820 files were ending up world-writeable. This was not a big issue, because,
3821 being within the spool directory, they were not world-accessible. I have
3822 created a function called modefopen, which takes an additional mode
3823 argument. It sets umask(777), creates the file, chmods it to the required
3824 mode, then resets the umask. All the relevant calls to fopen() in the
3825 content scanning code have been changed to use this function.
3827 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3828 to 24 hours. This avoids potential overflow problems when processing G
3829 and H retry rules. I suspect nobody ever tinkers with this value.
3831 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3833 PH/45 When the plaintext authenticator is running as a client, the server's
3834 challenges are checked to ensure they are valid base64 strings. By
3835 default, the authentication attempt is cancelled if an invalid string is
3836 received. Setting client_ignore_invalid_base64 true ignores these errors.
3837 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3838 they are received. Thus, the responses can be made to depend on the
3839 challenges. If an invalid string is ignored, an empty string is placed in
3842 PH/46 Messages that are created by the autoreply transport now contains a
3843 References: header, in accordance with RFCs 2822 and 3834.
3845 PH/47 Added authenticated_sender_force to the smtp transport.
3847 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3849 PH/49 Installed latest patch from the Sieve maintainer.
3851 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3852 was also set, the appendfile transport was unnecessarily scanning a
3853 directory of message files (e.g. for maildir delivery) to find the count
3854 of files (along with the size), even though it did not need this
3855 information. It now does the scan only if it needs to find either the
3856 size of the count of files.
3858 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3860 PH/52 Two bugs concerned with error handling when the smtp transport is
3863 (i) Exim was not creating retry information for temporary errors given
3864 for individual recipients after the DATA command when the smtp transport
3865 was used in LMTP mode. This meant that they could be retried too
3866 frequently, and not timed out correctly.
3868 (ii) Exim was setting the flag that allows error details to be returned
3869 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3870 recipients that were returned after the DATA command.
3872 PH/53 This is related to PH/52, but is more general: for any failing address,
3873 when detailed error information was permitted to be returned to the
3874 sender, but the error was temporary, then after the final timeout, only
3875 "retry timeout exceeded" was returned. Now it returns the full error as
3876 well as "retry timeout exceeded".
3878 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3879 do this, and (what is worse) MTAs that accept it.
3881 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3882 will now be deprecated.
3884 PH/56 New os.c-cygwin from the Cygwin maintainer.
3886 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3887 formats (previously only available in exim formats via -bpr, -bpru,
3888 and -bpra. Now also available in native and exiqgrep formats)
3890 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3891 with very large, slow to parse queues
3893 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3895 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3897 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3898 responses to authentication challenges, though it was showing the
3899 challenges; (ii) I've removed the CR characters from the debug output for
3902 PH/58 Allow for the insertion of a newline as well as a space when a string
3903 is turned into more than one encoded-word during RFC 2047 encoding. The
3904 Sieve code now uses this.
3906 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3907 data_4xx, lost_connection, tls_required.
3909 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3910 message was being sent as an SMTP response.
3912 PH/61 Add -l and -k options to exicyclog.
3914 PH/62 When verifying, if an address was redirected to one new address, so that
3915 verification continued, and the new address failed or deferred after
3916 having set something in $address_data, the value of $address_data was not
3917 passed back to the ACL. This was different to the case when no
3918 redirection occurred. The value is now passed back in both cases.
3920 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3921 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3922 use login_cap.h, so on its own it isn't the distinguishing feature. The
3923 new name refers directly to the setclassresources() function.
3925 PH/65 Added configuration files for NetBSD3.
3927 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3929 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3930 is preferred over IPv4.
3932 PH/68 The bounce_return_message and bounce_return_body options were not being
3933 honoured for bounces generated during the reception of non-SMTP messages.
3934 In particular, this applied to messages rejected by the ACL. This bug has
3935 been fixed. However, if bounce_return_message is true and bounce_return_
3936 body is false, the headers that are returned for a non-SMTP message
3937 include only those that have been read before the error was detected.
3938 (In the case of an ACL rejection, they have all been read.)
3940 PH/69 The HTML version of the specification is now built in a directory called
3941 spec_html instead of spec.html, because the latter looks like a path with
3942 a MIME-type, and this confuses some software.
3944 PH/70 Catch two compiler warnings in sieve.c.
3946 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3947 function verify_get_ident() calls ip_connect() to connect a socket, but
3948 if the "connect()" function timed out, ip_connect() used to close the
3949 socket. However, verify_get_ident() also closes the socket later, and in
3950 between Exim writes to the log, which may get opened at this point. When
3951 the socket was closed in ip_connect(), the log could get the same file
3952 descriptor number as the socket. This naturally causes chaos. The fix is
3953 not to close the socket in ip_connect(); the socket should be closed by
3954 the function that creates it. There was only one place in the code where
3955 this was missing, in the iplookup router, which I don't think anybody now
3956 uses, but I've fixed it anyway.
3958 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3959 well as to direct DNS lookups. Otherwise the handling of names in host
3960 lists is inconsistent and therefore confusing.
3966 PH/01 Two changes to the default runtime configuration:
3968 (1) Move the checks for relay_from_hosts and authenticated clients from
3969 after to before the (commented out) DNS black list checks.
3971 (2) Add control=submission to the relay_from_hosts and authenticated
3972 clients checks, on the grounds that messages accepted by these
3973 statements are most likely to be submissions.
3975 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3977 (1) Generate an error if the third argument for the ${prvs expansion is
3980 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3983 (3) Reset the variables that are obtained from the first argument of
3984 ${prvscheck and used in the second argument before leaving the code,
3985 because their memory is reclaimed, so using them afterwards may do
3988 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3989 one (it's much easier than Tom thought :-).
3991 (5) Because of (4), we can now allow for the use of $prvscheck_result
3992 inside the third argument.
3994 PH/03 For some reason, the default setting of PATH when running a command from
3995 a pipe transport was just "/usr/bin". I have changed it to
3998 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3999 anything to be listed in the output from -bV.
4001 PH/05 When a filter generated an autoreply, the entire To: header line was
4002 quoted in the delivery log line, like this:
4004 => >A.N.Other <ano@some.domain> <original@ddress> ...
4006 This has been changed so that it extracts the operative address. There
4007 may be more than one such address. If so, they are comma-separated, like
4010 => >ano@some.domain,ona@other.domain <original@ddress> ...
4012 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4013 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4014 not being looked up in the rDNS to get a host name, Exim was showing the
4015 IP address twice in Received: lines, even though the IP addresses were
4016 identical. For example:
4018 Received: from [1.2.3.4] (helo=[1.2.3.4])
4020 However, if the real host name was known, it was omitting the HELO data
4021 if it matched the actual IP address. This has been tidied up so that it
4022 doesn't show the same IP address twice.
4024 PH/07 When both +timestamp and +memory debugging was on, the value given by
4025 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4026 called by the debug printing, thereby overwriting the timestamp buffer.
4027 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4029 PH/08 When the original message was included in an autoreply transport, it
4030 always said "this is a copy of the message, including all the headers",
4031 even if body_only or headers_only was set. It now gives an appropriate
4034 PH/09 Applied a patch from the Sieve maintainer which:
4036 o fixes some comments
4037 o adds the (disabled) notify extension core
4038 o adds some debug output for the result of if/elsif tests
4039 o points to the current vacation draft in the documentation
4040 and documents the missing references header update
4044 o fixes a bug in processing the envelope test (when testing
4045 multiple envelope elements, the last element determined the
4048 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4049 Electronic Mail") by including:
4051 Auto-submitted: auto-generated
4053 in the messages that it generates (bounce messages and others, such as
4054 warnings). In the case of bounce messages for non-SMTP messages, there was
4055 also a typo: it was using "Auto_submitted" (underscore instead of
4056 hyphen). Since every message generated by Exim is necessarily in response
4057 to another message, thes have all been changed to:
4059 Auto-Submitted: auto-replied
4061 in accordance with these statements in the RFC:
4063 The auto-replied keyword:
4065 - SHOULD be used on messages sent in direct response to another
4066 message by an automatic process,
4068 - MUST NOT be used on manually-generated messages,
4070 - MAY be used on Delivery Status Notifications (DSNs) and Message
4071 Disposition Notifications (MDNs),
4073 - MUST NOT be used on messages generated by automatic or periodic
4074 processes, except for messages which are automatic responses to
4077 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4078 to the default Received: header definition.
4080 PH/12 Added log selector acl_warn_skipped (default on).
4082 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4083 variables because (a) they are in the wrong storage pool and (b) even if
4084 they were copied, it wouldn't work properly because of the caching.
4086 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4087 checking when decoding. Apparently there are clients that generate
4088 overlong encoded strings. Why am I not surprised?
4090 PH/15 If the first argument of "${if match_address" was not empty, but did not
4091 contain an "@" character, Exim crashed. Now it writes a panic log message
4092 and treats the condition as false.
4094 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4096 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4097 extension "envelope-auth". The code is finished and in agreement with
4098 other implementations, but there is no documentation so far and in fact,
4099 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4100 not changing the active code.
4102 Print executed "if" and "elsif" statements when debugging is used. This
4103 helps a great deal to understand what a filter does.
4105 Document more things not specified clearly in RFC3028. I had all this
4106 sorted out, when out of a sudden new issues came to my mind. Oops."
4108 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4111 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4112 canonical form (as documented). However, after a host name lookup from
4113 the IP address, check_host() was doing a simple string comparison with
4114 addresses acquired from the DNS when checking that the found name did
4115 have the original IP as one of its addresses. Since any found IPv6
4116 addresses are likely to be in abbreviated form, the comparison could
4117 fail. Luckily, there already exists a function for doing the comparison
4118 by converting both addresses to binary, so now that is used instead of
4119 the text comparison.
4121 PH/20 There was another similar case to PH/19, when a complete host name was
4122 given in a host list; looking up its IP address could give an abbreviated
4123 form, whereas the current host's name might or might not be abbreviated.
4124 The same fix has been applied.
4130 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4131 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4134 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4135 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4137 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4139 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4140 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4141 Also, for "Auto-Submitted", treat anything other than "no" as
4142 non-personal, in accordance with RFC 3834. (Previously it treated
4143 anything starting "auto-" as non-personal.)
4145 TF/01 The control=submission/name=... option had a problem with syntax
4146 errors if the name included a slash character. The /name= option
4147 now slurps the rest of the string, so it can include any characters
4148 but it must come last in the list of options (after /sender_retain
4151 PH/05 Some modifications to the interface to the fake nameserver for the new
4159 TK/01 Added the "success_on_redirect" address verification option. See
4160 NewStuff for rationale and an example.
4162 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4164 PH/02 Patch to exigrep to allow it to work on syslog lines.
4166 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4167 fread() to skip over the body file's header line, because in Cygwin the
4168 header line is locked and is inaccessible.
4170 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4171 co-exist for some time) to make it clear that it is the Exim ID that is
4172 referenced, not the Message-ID: header line.
4174 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4175 string_format() function, because snprintf() does not exist on all
4178 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4179 ${stat: expansion item.
4181 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4182 protocol synchronization error", to keep the pedants happy.
4184 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4185 well as for IRIX systems, when gcc is being used. See the host.c source
4188 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4190 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4193 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4194 transport and to the smtp transport in LMTP mode.
4196 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4198 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4199 run a filter in a subprocess. This could lead to confusion in subsequent
4200 lookups in the parent process. There should also be a search_tidyup() at
4201 the end of the subprocess.
4203 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4204 only if the host matched helo_try_verify_hosts, which caused the
4205 verification to occur when the EHLO/HELO command was issued. The ACL just
4206 tested the remembered result. Now, if a previous verification attempt has
4207 not happened, "verify = helo" does it there and then.
4209 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4211 TK/03 Fix log output including CR from clamd.
4213 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4214 exist provoked a memory error which could cause a segfault.
4216 PH/15 Installed PCRE 6.2
4218 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4220 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4221 of the problem. Specifically, suggested +O2 rather than +O1 for the
4224 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4226 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4227 record, the port was not correctly logged when the outgoing_port log
4228 selector was set (it logged the transort's default port).
4230 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4231 fallback_hosts, and "hosts" in the smtp transport.
4233 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4234 host errors such as "Connection refused".
4236 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4237 authentication with radiusclient 0.4.9:
4239 - Error returned from rc_read_config was caught wrongly
4240 - Username/password not passed on to radius server due to wrong length.
4242 The presumption is that some radiusclient API changes for 4.51/PH/17
4243 were not taken care of correctly. The code is still untested by me (my
4244 Linux distribution still has 0.3.2 of radiusclient), but it was
4245 contributed by a Radius user.
4247 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4248 expanding the "port" option of the smtp transport.
4250 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4251 while reading a MIME header. Thanks to Tom Hughes for a patch.
4253 PH/24 Include config.h inside local_scan.h so that configuration settings are
4256 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4257 that in an ACL for RCPT (for example), you can examine exactly what was
4260 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4261 commands, but it was not correctly comparing the address with the actual
4262 client host address. Thus, it would show the EHLO address in Received:
4263 header lines when this was not necessary.
4265 PH/27 Added the % operator to ${eval:}.
4267 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4268 it should be ignoring failures (because with -C, for example, it has lost
4269 privilege). It wasn't ignoring creation failures other than "already
4272 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4275 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4276 because an input line was too long, either on its own, or by virtue of
4277 too many continuations, the temporary file was not being removed, and the
4278 return code was incorrect.
4280 PH/31 Missing "BOOL" in function definition in filtertest.c.
4282 PH/32 Applied Sieve patches from the maintainer.
4284 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4286 PH/33 Added "verify = not_blind".
4288 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4289 Local/Makefile (with some defaults set). These are used in built scripts
4290 such as exicyclog, but they have never been used in the exim_install
4291 script (though there are many overriding facilities there). I have
4292 arranged that the exim_install script now takes note of these two
4295 PH/35 Installed configuration files for Dragonfly.
4297 PH/36 When a locally submitted message by a trusted user did not contain a
4298 From: header, and the sender address was obtained from -f or from an SMTP
4299 MAIL command, and the trusted user did not use -F to supply a sender
4300 name, $originator_name was incorrectly used when constructing a From:
4301 header. Furthermore, $originator_name was used for submission mode
4302 messages from external hosts without From: headers in a similar way,
4303 which is clearly wrong.
4305 PH/37 Added control=suppress_local_fixups.
4307 PH/38 When log_selector = +received_sender was set, and the addition of the
4308 sender made the log line's construction buffer exactly full, or one byte
4309 less than full, an overflow happened when the terminating "\n" was
4312 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4313 when the result of a list match is failure because a DNS lookup failed.
4315 PH/40 RM_COMMAND is now used in the building process.
4317 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4318 the "build-* directories that it finds.
4320 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4321 address in a domain literal was a prefix of an interface address.
4323 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4324 when verifying a sender address, unless rewrite_headers is false.
4326 PH/44 Wrote a long comment about why errors_to addresses are verified as
4327 recipients, not senders.
4329 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4330 the ratelimit ACL was added.
4332 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4334 PH/46 Added extra information about PostgreSQL errors to the error string.
4336 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4337 avoiding the need to install special zones in a real server. This is
4338 backwards compatible; if it can't find the fake resolver, it drops back.
4339 Thus, both old and new test suites can be run.
4341 TF/02 Added util/ratelimit.pl
4343 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4344 clock is set back in time.
4346 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4347 Candler <B.Candler@pobox.com>.
4349 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4350 OK for addresses that are the result of redirections.
4352 PH/48 A number of further additions for the benefit of the new test suite,
4353 including a fake gethostbyname() that interfaces to the fake DNS resolver
4356 TF/06 The fix for widen_domains has also been applied to qualify_single and
4357 search_parents which are the other dnslookup options that can cause
4360 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4363 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4365 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4366 service" if it encountered an MX record with an empty target hostname.
4367 The message is now "an MX or SRV record indicated no SMTP service".
4369 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4370 if the DNS of the sending site is misconfigured. This is quite a
4371 common situation. This change restores the behaviour of treating a
4372 helo verification defer as a failure.
4374 PH/51 If self=fail was set on a router, the bounce message did not include the
4375 actual error message.
4381 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4383 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4384 command itself ended in error, the underlying message about the transport
4385 filter timeout was being overwritten with the pipe command error. Now the
4386 underlying error message should be appended to the second error message.
4388 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4390 PH/02 Reduce the amount of output that "make" produces by default. Full output
4391 can still be requested.
4393 PH/03 The warning log line about a condition test deferring for a "warn" verb
4394 was being output only once per connection, rather than after each
4395 occurrence (because it was using the same function as for successful
4396 "warn" verbs). This seems wrong, so I have changed it.
4398 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4399 it should not have, which might have caused a crash in the right
4400 circumstances, but probably never did.
4402 PH/04 Installed a modified version of Tony Finch's patch to make submission
4403 mode fix the return path as well as the Sender: header line, and to
4404 add a /name= option so that you can make the user's friendly name appear
4407 TF/03 Added the control = fakedefer ACL modifier.
4409 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4410 Mark Lowes for thorough testing.
4412 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4414 TK/03 Merged latest SRS patch from Miles Wilton.
4416 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4417 with the definition in sysexits.h (which is #included earlier).
4418 Fortunately, Exim does not actually use EX_OK. The code used to try to
4419 preserve the sysexits.h value, by assuming that macro definitions were
4420 scanned for macro replacements. I have been disabused of this notion,
4421 so now the code just undefines EX_OK before #including unistd.h.
4423 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4424 in the smtp transport. When a block could not be written in a single
4425 write() function, the timeout was being re-applied to each part-write.
4426 This seems wrong - if the receiver was accepting one byte at a time it
4427 would take for ever. The timeout is now adjusted when this happens. It
4428 doesn't have to be particularly precise.
4430 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4431 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4433 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4434 without a domain if the check to <postmaster@domain> fails.
4436 SC/01 Eximstats: added -xls and the ability to specify output files
4437 (patch written by Frank Heydlauf).
4439 SC/02 Eximstats: use FileHandles for outputting results.
4441 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4443 SC/04 Eximstats: fixed display of large numbers with -nvr option
4445 SC/05 Eximstats: fixed merging of reports with empty tables.
4447 SC/06 Eximstats: added the -include_original_destination flag
4449 SC/07 Eximstats: removed tabs and trailing whitespace.
4451 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4453 TK/06 MBOX spool code: Add real "From " MBOX separator line
4454 so the .eml file is really in mbox format (even though
4455 most programs do not really care). Patch from Alex Miller.
4457 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4458 The latter is generated from $received_to and is only set if the
4459 message has one envelope recipient. SA can use these headers,
4460 obviously out-of-the-box. Patch from Alex Miller.
4462 PH/08 The ${def test on a variable was returning false if the variable's
4463 value was "0", contrary to what the specification has always said!
4464 The result should be true unless the variable is empty.
4466 PH/09 The syntax error of a character other than { following "${if
4467 def:variable_name" (after optional whitespace) was not being diagnosed.
4468 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4469 accidental colon was present, for example, could give incorrect results.
4471 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4472 result is used (not including appendfile, where other changes are about
4475 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4476 This involved changing a lot of size variables from int to off_t. It
4477 should work with maildirs and everything.
4479 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4480 spamd dying while we are connected to it.
4482 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4485 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4486 function for BDB 4.3.
4488 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4490 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4491 the sources for PCRE have been re-arranged and more files are now
4494 PH/15 The code I had for printing potentially long long variables in PH/11
4495 above was not the best (it lost precision). The length of off_t variables
4496 is now inspected at build time, and an appropriate printing format (%ld
4497 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4498 to be "long long int" or "long int". This is needed for the internal
4499 formatting function string_vformat().
4501 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4502 the configuration file to be ":syslog", then the script "guesses" where
4503 the logs files are, rather than using the compiled in default. In our
4504 case the guess is not the same as the compiled default, so the script
4505 suddenly stopped working when I started to use syslog. The patch checks
4506 to see if log_file_path is "". If so, it attempts to read it from exim
4507 with no configuration file to get the compiled in version, before it
4508 falls back to the previous guessing code."
4510 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4511 implementing BATV in an Exim configuration. See NewStuff for the gory
4514 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4515 Makefile that are specific to HP-UX.
4517 PH/18 If the "use_postmaster" option was set for a recipient callout together
4518 with the "random" option, the postmaster address was used as the MAIL
4519 FROM address for the random test, but not for the subsequent recipient
4520 test. It is now used for both.
4522 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4523 patch removes a few documentation additions to RFC 3028, because the
4524 latest draft now contains them. It adds the new en;ascii-case comparator
4525 and a new error check for 8bit text in MIME parts. Comparator and
4526 require names are now matched exactly. I enabled the subaddress
4527 extension, but it is not well tested yet (read: it works for me)."
4529 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4530 rework some of the code of TK/09 above to avoid the hardwired use of
4531 "%lld" and "long long". Replaced the call to snprintf() with a call to
4534 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4535 records point to non-existent hosts", "retry timeout exceeded", and
4536 "retry time not reached for any host after a long failure period".
4538 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4539 experimental DomainKeys support:
4541 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4542 (2) On an error such as an illegally used "control", the wrong name for
4543 the control was given.
4545 These problems did NOT occur unless DomainKeys support was compiled.
4547 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4549 PH/24 Added ${if match_ip condition.
4551 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4552 databases so that it will be absolutely obvious if a crash occurs in the
4553 DB library. This is a regular occurrence (often caused by mis-matched
4556 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4557 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4558 picked up on a user's system that detects such things. There doesn't seem
4559 to be a gcc warning option for this - only an attribute that has to be
4560 put on the function's prototype. It seems that in Fedora Core 4 they have
4561 set this on a number of new functions. No doubt there will be more in due
4564 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4565 specify a transport. However, if an address that was verified by such a
4566 router was the subject of a callout, Exim crashed because it tried to
4567 read the rcpt_include_affixes from the non-existent transport. Now it
4568 just assumes that the setting of that option is false. This bug was
4569 introduced by 4.51/PH/31.
4571 PH/28 Changed -d+all to exclude +memory, because that information is very
4572 rarely of interest, but it makes the output a lot bigger. People tend to
4573 do -d+all out of habit.
4575 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4576 code in os-type was giving problems when libc.so lives in lib64, like on
4579 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4580 aren't the modern standard, and it seems that some systems' include files
4581 don't always have them. Exim was already checking for some of the newer
4582 ones like T_AAAA, and defining it itself. I've added checks for all the
4583 record types that Exim uses.
4585 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4586 not automatically generating a new one, as it is supposed to. This
4587 prevented TLS from working. If the file did exist, but contained invalid
4588 data, a new version was generated, as expected. It was only the case of a
4589 non-existent file that was broken.
4591 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4592 with a change in libdomainkeys > 0.64.
4594 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4595 from DNS. If the selector record carries the flag, it now has
4596 precedence over the domain-wide flag.
4598 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4600 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4601 the use of a port name that isn't defined in /etc/services) occurred, the
4602 message was deferred as in a normal delivery, and thus remained on the
4603 spool, instead of being failed because of the mua_wrapper setting. This
4604 is now fixed, and I tidied up some of the mua_wrapper messages at the
4607 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4608 the messages in a hash of arrays rather than using individual hashes.
4609 This is a bit cleaner and results in dramatic memory savings, albeit
4610 at a slight CPU cost.
4612 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4613 as requested by Marc Sherman.
4615 SC/10 Eximstats: added histograms for user specified patterns as requested
4618 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4620 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4621 fopen() in the content-scanning modules that did not already have it.
4627 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4628 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4630 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4632 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4634 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4635 to test Sieve filters that use "vacation".
4637 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4638 that changes the way the GnuTLS parameters are stored in the cache file.
4639 The new format can be generated externally. For backward compatibility,
4640 if the data in the cache doesn't make sense, Exim assumes it has read an
4641 old-format file, and it generates new data and writes a new file. This
4642 means that you can't go back to an older release without removing the
4645 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4646 work if there are any delivery delays because "one_time" forces the
4647 parent to be marked "delivered", so its unseen clone is never tried
4648 again. For this reason, Exim now forbids the simultaneous setting of
4651 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4652 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4653 entry if you want to know the details. The fix, however, neglected to
4654 consider the case when local delivery batching is involved. The test for
4655 "previously delivered" was not happening when checking to see if an
4656 address could be batched with a previous (undelivered) one; under
4657 certain circumstances this could lead to multiple deliveries to the same
4660 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4661 in its include files, and this causes problems building Exim.
4663 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4664 header_syntax) but Exim was just ignoring anything given after a slash.
4665 In particular, this caused confusion with an attempt to use "verify =
4666 reverse_host_lookup/defer_ok". An error is now given when options are
4667 supplied for verify items that do not have them. (Maybe reverse_host_
4668 lookup should have a defer_ok option, but that's a different point.)
4670 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4671 defined by RFC 821) to 2048, because there were problems with some AUTH
4672 commands, and RFC 1869 says the size should be increased for extended
4673 SMTP commands that take arguments.
4675 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4678 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4679 "unknown" error; now it says that the functionality isn't in the binary.
4681 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4682 an address' error message when a string expansion fails (syntax or
4683 whatever). Otherwise the password may appear in the log. Following change
4684 PH/42 below, there is no longer a chance of it appearing in a bounce
4687 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4689 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4690 of its addresses was ever tried. (Bugzilla bug #2.)
4692 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4693 the result incorrectly in the debug output. (It correctly added a newline
4694 to what was transported.)
4696 TF/01 Added $received_time.
4698 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4699 commented out examples of how to interface to a virus scanner and to
4700 SpamAssassin. Also added commented examples of av_scanner and
4701 spamd_address settings.
4703 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4704 and controls are allowed in which ACLs. There were a couple of minor
4705 errors. Some of the entries in the conditions table (which is a table of
4706 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4707 negation of where the condition IS allowed.
4709 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4711 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4712 header file does not have a version number, so I've had to invent a new
4713 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4714 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4715 radiusclient), but it was contributed by a Radius user.
4717 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4718 files or directories, for OpenSSL.
4720 PH/19 When an Exim process that is running as root has to create an Exim log
4721 file, it does so in a subprocess that runs as exim:exim so as to get the
4722 ownership right at creation (otherwise, other Exim processes might see
4723 the file with the wrong ownership). There was no test for failure of this
4724 fork() call, which would lead to the process getting stuck as it waited
4725 for a non-existent subprocess. Forks do occasionally fail when resources
4726 run out. I reviewed all the other calls to fork(); they all seem to check
4729 PH/20 When checking for unexpected SMTP input at connect time (before writing
4730 the banner), Exim was not dealing correctly with a non-positive return
4731 from the read() function. If the client had disconnected by this time,
4732 the result was a log entry for a synchronization error with an empty
4733 string after "input=" when read() returned zero. If read() returned -1
4734 (an event I could not check), uninitialized data bytes were printed.
4735 There were reports of junk text (parts of files, etc) appearing after
4738 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4740 PH/22 Added support for macro redefinition, and (re)definition in between
4741 driver and ACL definitions.
4743 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4744 forgetting to use the resulting value; it was using the unexpanded value.
4746 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4747 hadn't been configured. The fix is from Juergen Kreileder, who
4748 understands it better than I do:
4750 "Here's what I see happening with three configured cyrus_sasl
4751 authenticators configured (plain, login, cram-md5):
4753 On startup auth_cyrus_sasl_init() gets called for each of these.
4754 This means three calls to sasl_listmech() without a specified mech_list.
4755 => SASL tests which mechs of all available mechs actually work
4756 => three warnings about OTP not working
4757 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4759 With the patch, sasl_listmech() also gets called three times. But now
4760 SASL's mech_list option is set to the server_mech specified in the the
4761 authenticator. Or in other words, the answer from sasl_listmech()
4762 gets limited to just the mech you're testing for (which is different
4764 => the return list contains just 'plain' or 'login', 'cram-md5' or
4765 nothing depending on the value of ob->server_mech.
4767 I've just tested the patch: Authentication still works fine,
4768 unavailable mechs specified in the exim configuration are still
4769 caught, and the auth.log warnings about OTP are gone."
4771 PH/25 When debugging is enabled, the contents of the command line are added
4772 to the debugging output, even when log_selector=+arguments is not
4775 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4776 answer is "GNU", and only if the return is "GNU/something" is the answer
4779 PH/27 $acl_verify_message is now set immediately after the failure of a
4780 verification in an ACL, and so is available in subsequent modifiers. In
4781 particular, the message can be preserved by coding like this:
4783 warn !verify = sender
4784 set acl_m0 = $acl_verify_message
4786 Previously, $acl_verify_message was set only while expanding "message"
4787 and "log_message" when a very denied access.
4789 PH/28 Modified OS/os.c-Linux with
4791 -#ifndef OS_LOAD_AVERAGE
4792 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4794 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4795 nomenclature these days.)
4797 PH/29 Installed patch from the Sieve maintainer that adds the options
4798 sieve_useraddress and sieve_subaddress to the redirect router.
4800 PH/30 In these circumstances:
4801 . Two addresses routed to the same list of hosts;
4802 . First host does not offer TLS;
4803 . First host accepts first address;
4804 . First host gives temporary error to second address;
4805 . Second host offers TLS and a TLS session is established;
4806 . Second host accepts second address.
4807 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4808 and peerdn, if requested) that were in fact used only for the second
4811 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4812 attention to any local part prefix or suffix that was matched by the
4813 router that accepted the address. It now behaves in the same way as it
4814 does for delivery: the affixes are removed from the local part unless
4815 rcpt_include_affixes is set on the transport.
4817 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4818 timeout during the DATA phase of an incoming message.
4820 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4821 applied a patch sanctioned by the Sieve maintainer.
4823 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4824 the uid or gid is negative. A case of a negative gid caused this to be
4825 noticed. The fix allows for either to be negative.
4827 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4828 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4831 PH/36 The change PH/12 above was broken. Fixed it.
4833 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4834 the grounds that routing the same address twice would always produce the
4835 same answer. This might have been true once, but it is certainly no
4836 longer true now. Routing a child address may depend on the previous
4837 routing that produced that child. Some complicated redirection strategies
4838 went wrong when messages had multiple recipients, and made Exim's
4839 behaviour dependent on the order in which the addresses were given.
4841 I have moved the duplicate checking until after the routing is complete.
4842 Exim scans the addresses that are assigned to local and remote
4843 transports, and removes any duplicates. This means that more work will be
4844 done, as duplicates will always all be routed, but duplicates are
4845 presumably rare, so I don't expect this is of any significance.
4847 For deliveries to pipes, files, and autoreplies, the duplicate checking
4848 still happens during the routing process, since they are not going to be
4851 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4852 It corrects a timeout issue with spamd. This is Ian's comment: "The
4853 background is that sometimes spamd either never reads data from a
4854 connection it has accepted, or it never writes response data. The exiscan
4855 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4856 blindly assumes that writes won't block so it may never time out."
4858 PH/39 Allow G after quota size as well as K and M.
4860 PH/40 The value set for $authenticated_id in an authenticator may not contain
4861 binary zeroes or newlines because the value is written to log lines and
4862 to spool files. There was no check on this. Now the value is run through
4863 the string_printing() function so that such characters are converted to
4864 printable escape sequences.
4866 PH/41 $message_linecount is a new variable that contains the total number of
4867 lines in the message. Compare $body_linecount, which is the count for the
4870 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4871 bounce and delay warning messages, except in certain special cases, which
4874 (a) An SMTP error message from a remote host;
4875 (b) A message specified in a :fail: redirection;
4876 (c) A message specified in a "fail" command in a system filter;
4877 (d) A message specified in a FAIL return from the queryprogram router;
4878 (e) A message specified by the cannot_route_message router option.
4880 In these cases only, Exim does include the error details in bounce and
4881 warning messages. There are also a few cases where bland messages such
4882 as "unrouteable address" or "local delivery error" are given.
4884 PH/43 $value is now also set for the "else" part of a ${run expansion.
4886 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4887 being worked on, but at least Exim now implements the latest version to
4890 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4891 process to complete was treated as a delivery failure, a timeout while
4892 writing the message to the pipe was logged, but erroneously treated as a
4893 successful delivery. Such timeouts include transport filter timeouts. For
4894 consistency with the overall process timeout, these timeouts are now
4895 treated as errors, giving rise to delivery failures by default. However,
4896 there is now a new Boolean option for the pipe transport called
4897 timeout_defer, which, if set TRUE, converts the failures into defers for
4898 both kinds of timeout. A transport filter timeout is now identified in
4901 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4902 systems where "make" and "gmake" are different, calling "gmake" at top
4903 level broke things. I've arranged for the value of $(MAKE) to be passed
4904 from the Makefile to this script so that it can call the same version of
4908 A note about Exim versions 4.44 and 4.50
4909 ----------------------------------------
4911 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4912 changes of various kinds. As a consequence, a big documentation update was
4913 needed. This delayed the release for rather longer than seemed good, especially
4914 in the light of a couple of (minor) security issues. Therefore, the changes
4915 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4916 release. So 4.44 and 4.50 are in effect two different branches that both start
4919 I have left the 4.50 change log unchanged; it contains all the changes since
4920 4.43. The change log for 4.44 is below; many of its items are identical to
4921 those for 4.50. This seems to be the most sensible way to preserve the
4922 historical information.
4928 1. Minor wording change to the doc/README.SIEVE file.
4930 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4931 computation of the current number of files was incorrect.
4933 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4934 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4937 4. Give more explanation in the error message when the command for a transport
4938 filter fails to execute.
4940 5. There are several places where Exim runs a non-Exim command in a
4941 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4942 was being done only for the command run by the queryprogram router. It is
4943 now done for all such subprocesses. The other cases are: ${run, transport
4944 filters, and the commands run by the lmtp and pipe transports.
4946 6. Added CONFIGURE_GROUP build-time option.
4948 7. Some older OS have a limit of 256 on the maximum number of file
4949 descriptors. Exim was using setrlimit() to set 1000 as a large value
4950 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4951 systems. I've change it so that if it can't get 1000, it tries for 256.
4953 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4954 was an oversight, and furthermore, ever since the addition of extra
4955 controls (e.g. 4.43/32), the checks on when to allow different forms of
4956 "control" were broken. There should now be diagnostics for all cases when a
4957 control that does not make sense is encountered.
4959 9. Added the /retain_sender option to "control=submission".
4961 10. $recipients is now available in the predata ACL (oversight).
4963 11. Tidy the search cache before the fork to do a delivery from a message
4964 received from the command line. Otherwise the child will trigger a lookup
4965 failure and thereby defer the delivery if it tries to use (for example) a
4966 cached ldap connection that the parent has called unbind on.
4968 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4969 of $address_data from the recipient verification was clobbered by the
4970 sender verification.
4972 13. The value of address_data from a sender verification is now available in
4973 $sender_address_data in subsequent conditions in the ACL statement.
4975 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4977 15. Added a new option "connect=<time>" to callout options, to set a different
4980 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4981 was its contents. (It was OK if the option was not defined at all.)
4983 17. A "Completed" log line is now written for messages that are removed from
4984 the spool by the -Mrm option.
4986 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4987 information about exactly what failed.
4989 19. Added -dd to debug only the daemon process.
4991 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4992 handles timeouts, both on the server side and network timeouts. Renamed the
4993 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4995 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4996 It is now set to "smtps".
4998 22. $host_address is now set to the target address during the checking of
4999 ignore_target_hosts.
5001 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5002 being passed; this would have caused $sender_host_name to have been used if
5003 matching the list had actually called for a host name (not very likely,
5004 since this list is usually IP addresses). A host name is now passed as
5007 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5008 code that specifies a non-restarting handler (typically sigaction() in
5009 modern systems) in an attempt to fix a rare and obscure crash bug.
5011 25. Narrowed the window for a race in the daemon that could cause it to ignore
5012 SIGCHLD signals. This is not a major problem, because they are used only to
5013 wake it up if nothing else does.
5015 26. A malformed maildirsize file could cause Exim to calculate negative values
5016 for the mailbox size or file count. Odd effects could occur as a result.
5017 The maildirsize information is now recalculated if the size or filecount
5020 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5021 support for a long time. Removed HAVE_SYS_VFS_H.
5023 28. Installed the latest version of exipick from John Jetmore.
5025 29. In an address list, if the pattern was not a regular expression, an empty
5026 subject address (from a bounce message) matched only if the pattern was an
5027 empty string. Non-empty patterns were not even tested. This was the wrong
5028 because it is perfectly reasonable to use an empty address as part of a
5029 database query. An empty address is now tested by patterns that are
5030 lookups. However, all the other forms of pattern expect the subject to
5031 contain a local part and a domain, and therefore, for them, an empty
5032 address still always fails if the pattern is not itself empty.
5034 30. Exim went into a mad DNS loop when attempting to do a callout where the
5035 host was specified on an smtp transport, and looking it up yielded more
5036 than one IP address.
5038 31. Re-factored the code for checking spool and log partition space into a
5039 function that finds that data and another that does the check. The former
5040 is then used to implement four new variables: $spool_space, $log_space,
5041 $spool_inodes, and $log_inodes.
5043 32. The RFC2047 encoding function was originally intended for short strings
5044 such as real names; it was not keeping to the 75-character limit for
5045 encoded words that the RFC imposes. It now respects the limit, and
5046 generates multiple encoded words if necessary. To be on the safe side, I
5047 have increased the buffer size for the ${rfc2047: expansion operator from
5050 33. It is now permitted to omit both strings after an "if" condition; if the
5051 condition is true, the result is "true". As before, when the second string
5052 is omitted, a false condition yields an empty string. This makes it less
5053 cumbersome to write custom ACL and router conditions.
5055 34. Failure to deliver a bounce message always caused it to be frozen, even if
5056 there was an errors_to setting on the router. The errors_to setting is now
5059 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5060 canonical form (fully expanded) before being placed in
5061 $sender_host_address.
5063 36. The table in the code that translates DNS record types into text (T_A to
5064 "A" for instance) was missing entries for NS and CNAME. It is just possible
5065 that this could have caused confusion if both these types were looked up
5066 for the same domain, because the text type is used as part of Exim's
5067 per-process caching. But the chance of anyone hitting this buglet seems
5070 37. The dnsdb lookup has been extended in a number of ways.
5072 (1) There is a new type, "zns", which walks up the domain tree until it
5073 finds some nameserver records. It should be used with care.
5075 (2) There is a new type, "mxh", which is like "mx" except that it returns
5076 just the host names, not the priorities.
5078 (3) It is now possible to give a list of domains (or IP addresses) to be
5079 looked up. The behaviour when one of the lookups defers can be
5080 controlled by a keyword.
5082 (4) It is now possible to specify the separator character for use when
5083 multiple records are returned.
5085 38. The dnslists ACL condition has been extended: it is now possible to supply
5086 a list of IP addresses and/or domains to be looked up in a particular DNS
5089 39. Added log_selector=+queue_time_overall.
5091 40. When running the queue in the test harness, wait just a tad after forking a
5092 delivery process, to get repeatability of debugging output.
5094 41. Include certificate and key file names in error message when GnuTLS fails
5095 to set them up, because the GnuTLS error message doesn't include the name
5096 of the failing file when there is a problem reading it.
5098 42. Allow both -bf and -bF in the same test run.
5100 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5102 44. The "Exiscan patch" is now merged into the mainline Exim source.
5104 45. Sometimes the final signoff response after QUIT could fail to get
5105 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5106 < 0 before doing a fflush(). This bug looks as though it goes back to the
5107 introduction of TLS in release 3.20, but "sometimes" must have been rare
5108 because the tests only now provoked it.
5110 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5111 (this can affect the format of dates).
5113 47. exim_tidydb, when checking for the continued existence of a message for
5114 which it has found a message-specific retry record, was not finding
5115 messages that were in split spool directories. Consequently, it was
5116 deleting retry records that should have stayed in existence.
5118 48. Steve fixed some bugs in eximstats.
5120 49. The SPA authentication driver was not abandoning authentication and moving
5121 on to the next authenticator when an expansion was forced to fail,
5122 contradicting the general specification for all authenticators. Instead it
5123 was generating a temporary error. It now behaves as specified.
5125 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5126 (the order specifies the preference for clients). The order is now AES256,
5127 AES128, 3DES, ARCFOUR128.
5129 51. Small patch to Sieve code - explicitly set From: when generating an
5132 52. Exim crashed if a remote delivery caused a very long error message to be
5133 recorded - for instance if somebody sent an entire SpamAssassin report back
5134 as a large number of 550 error lines. This bug was coincidentally fixed by
5135 increasing the size of one of Exim's internal buffers (big_buffer) that
5136 happened as part of the Exiscan merge. However, to be on the safe side, I
5137 have made the code more robust (and fixed the comments that describe what
5140 53. Now that there can be additional text after "Completed" in log lines (if
5141 the queue_time_overall log selector is set), a one-byte patch to exigrep
5142 was needed to allow it to recognize "Completed" as not the last thing in
5145 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5146 patch that reportedly fixes this has been added. I am not expert enough to
5147 create a test for it. This is what the patch creator wrote:
5149 "I found a little strange behaviour of ldap code when working with
5150 Windows 2003 AD Domain, where users was placed in more than one
5151 Organization Units. When I tried to give exim partial DN, the exit code
5152 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5153 But simultaneously result of request was absolutely normal ldap result,
5154 so I produce this patch..."
5156 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5157 REFERENCE, so I have modified the code to exclude the patch when that macro
5160 55. Some experimental protocols are using DNS PTR records for new purposes. The
5161 keys for these records are domain names, not reversed IP addresses. The
5162 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5163 leaves it alone. Component reversal etc. now happens only for IP addresses.
5166 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5168 57. Double the size of the debug message buffer (to 2048) so that more of very
5169 long debug lines gets shown.
5171 58. The exicyclog utility now does better if the number of log files to keep
5172 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5174 59. Two changes related to the smtp_active_hostname option:
5176 (1) $smtp_active_hostname is now available as a variable.
5177 (2) The default for smtp_banner uses $smtp_active_hostname instead
5178 of $primary_hostname.
5180 60. The host_aton() function is supposed to be passed a string that is known
5181 to be a valid IP address. However, in the case of IPv6 addresses, it was
5182 not checking this. This is a hostage to fortune. Exim now panics and dies
5183 if the condition is not met. A case was found where this could be provoked
5184 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5185 components; fortuitously, this particular loophole had already been fixed
5186 by change 4.50/55 above.
5188 If there are any other similar loopholes, the new check in host_aton()
5189 itself should stop them being exploited. The report I received stated that
5190 data on the command line could provoke the exploit when Exim was running as
5191 exim, but did not say which command line option was involved. All I could
5192 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5193 running as the user.
5196 61. There was a buffer overflow vulnerability in the SPA authentication code
5197 (which came originally from the Samba project). I have added a test to the
5198 spa_base64_to_bits() function which I hope fixes it.
5201 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5202 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5204 63. The daemon start-up calls getloadavg() while still root for those OS that
5205 need the first call to be done as root, but it missed one case: when
5206 deliver_queue_load_max is set with deliver_drop_privilege. This is
5207 necessary for the benefit of the queue runner, because there is no re-exec
5208 when deliver_drop_privilege is set.
5210 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5211 This has been fixed.
5213 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5214 was in use, was not putting the data itself into the right store pool;
5215 consequently, it could be overwritten for a subsequent message in the same
5216 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5219 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5221 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5222 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5223 the function were treating the return as a boolean value, which happened to
5224 work because 0=false and not-0=true, but is not correct code.
5226 68. The host_aton() function was not handling scoped IPv6 addresses (those
5227 with, for example, "%eth0" on the end) correctly.
5229 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5230 negated items (that is, ~something) in unsigned ints. Some compilers
5231 apparently mutter when there is no cast.
5233 70. If an address verification called from an ACL failed, and did not produce a
5234 user-specific message (i.e. there was only a "system" message), nothing was
5235 put in $acl_verify_message. In this situation, it now puts the system
5238 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5239 session; change 4.31/43 added the unwanted input to the log line - except
5240 that it did not do this in the start of session case. It now does.
5242 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5243 This is wrong and can cause the other end to generate a synchronization
5244 error if it is another Exim or anything else that does the synchronization
5245 check. A QUIT command is no longer sent after a timeout.
5247 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5248 during host lookups.
5250 74. The defer_ok option of callout verification was not working if it was used
5251 when verifying addresses in header lines, that is, for this case:
5253 verify = header_sender/callout=defer_ok
5255 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5256 those file descriptors could be used for SMTP connections. If anything
5257 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5258 could be sent to the SMTP client, causing chaos. The daemon now opens
5259 stdin, stdout, and stderr to /dev/null when it puts itself into the
5262 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5263 log by default. The user can override this with suitable Perl magic.
5265 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5266 the log message when discard triggers, was not working for the DATA ACL or
5267 for the non-SMTP ACL.
5269 78. Error message wording change in sieve.c.
5271 79. If smtp_accept_max_per_host was set, the number of connections could be
5272 restricted to fewer than expected, because the daemon was trying to set up
5273 a new connection before checking whether the processes handling previous
5274 connections had finished. The check for completed processes is now done
5275 earlier. On busy systems, this bug wouldn't be noticed because something
5276 else would have woken the daemon, and it would have reaped the completed
5279 80. If a message was submitted locally by a user whose login name contained one
5280 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5281 It caused a spool format error. I have fixed the spool reading code. A
5282 related problem was that the "from" clause in the Received: line became
5283 illegal because of the space(s). It is now covered by ${quote_local_part.
5285 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5288 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5290 83. Patch from Sieve maintainer to fix unterminated string problem in
5291 "vacation" handling.
5293 84. Some minor changes to the Linux configuration files to help with other
5294 OS variants using glibc.
5296 85. One more patch for Sieve to update vacation handling to latest spec.
5299 ----------------------------------------------------
5300 See the note above about the 4.44 and 4.50 releases.
5301 ----------------------------------------------------
5307 1. Change 4.43/35 introduced a bug that caused file counts to be
5308 incorrectly computed when quota_filecount was set in an appendfile
5311 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5312 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5315 3. Give more explanation in the error message when the command for a transport
5316 filter fails to execute.
5318 4. There are several places where Exim runs a non-Exim command in a
5319 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5320 was being done only for the command run by the queryprogram router. It is
5321 now done for all such subprocesses. The other cases are: ${run, transport
5322 filters, and the commands run by the lmtp and pipe transports.
5324 5. Some older OS have a limit of 256 on the maximum number of file
5325 descriptors. Exim was using setrlimit() to set 1000 as a large value
5326 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5327 systems. I've change it so that if it can't get 1000, it tries for 256.
5329 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5330 was an oversight, and furthermore, ever since the addition of extra
5331 controls (e.g. 4.43/32), the checks on when to allow different forms of
5332 "control" were broken. There should now be diagnostics for all cases when a
5333 control that does not make sense is encountered.
5335 7. $recipients is now available in the predata ACL (oversight).
5337 8. Tidy the search cache before the fork to do a delivery from a message
5338 received from the command line. Otherwise the child will trigger a lookup
5339 failure and thereby defer the delivery if it tries to use (for example) a
5340 cached ldap connection that the parent has called unbind on.
5342 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5343 of $address_data from the recipient verification was clobbered by the
5344 sender verification.
5346 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5347 was its contents. (It was OK if the option was not defined at all.)
5349 11. A "Completed" log line is now written for messages that are removed from
5350 the spool by the -Mrm option.
5352 12. $host_address is now set to the target address during the checking of
5353 ignore_target_hosts.
5355 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5356 being passed; this would have caused $sender_host_name to have been used if
5357 matching the list had actually called for a host name (not very likely,
5358 since this list is usually IP addresses). A host name is now passed as
5361 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5362 code that specifies a non-restarting handler (typically sigaction() in
5363 modern systems) in an attempt to fix a rare and obscure crash bug.
5365 15. Narrowed the window for a race in the daemon that could cause it to ignore
5366 SIGCHLD signals. This is not a major problem, because they are used only to
5367 wake it up if nothing else does.
5369 16. A malformed maildirsize file could cause Exim to calculate negative values
5370 for the mailbox size or file count. Odd effects could occur as a result.
5371 The maildirsize information is now recalculated if the size or filecount
5374 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5375 support for a long time. Removed HAVE_SYS_VFS_H.
5377 18. Updated exipick to current release from John Jetmore.
5379 19. Allow an empty sender to be matched against a lookup in an address list.
5380 Previously the only cases considered were a regular expression, or an
5383 20. Exim went into a mad DNS lookup loop when doing a callout where the
5384 host was specified on the transport, if the DNS lookup yielded more than
5387 21. The RFC2047 encoding function was originally intended for short strings
5388 such as real names; it was not keeping to the 75-character limit for
5389 encoded words that the RFC imposes. It now respects the limit, and
5390 generates multiple encoded words if necessary. To be on the safe side, I
5391 have increased the buffer size for the ${rfc2047: expansion operator from
5394 22. Failure to deliver a bounce message always caused it to be frozen, even if
5395 there was an errors_to setting on the router. The errors_to setting is now
5398 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5399 canonical form (fully expanded) before being placed in
5400 $sender_host_address.
5402 24. Updated eximstats to version 1.33
5404 25. Include certificate and key file names in error message when GnuTLS fails
5405 to set them up, because the GnuTLS error message doesn't include the name
5406 of the failing file when there is a problem reading it.
5408 26. Expand error message when OpenSSL has problems setting up cert/key files.
5411 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5412 (this can affect the format of dates).
5414 28. exim_tidydb, when checking for the continued existence of a message for
5415 which it has found a message-specific retry record, was not finding
5416 messages that were in split spool directories. Consequently, it was
5417 deleting retry records that should have stayed in existence.
5419 29. eximstats updated to version 1.35
5420 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5421 1.35 - bugfix such that pie charts by volume are generated correctly
5423 30. The SPA authentication driver was not abandoning authentication and moving
5424 on to the next authenticator when an expansion was forced to fail,
5425 contradicting the general specification for all authenticators. Instead it
5426 was generating a temporary error. It now behaves as specified.
5428 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5429 (the order specifies the preference for clients). The order is now AES256,
5430 AES128, 3DES, ARCFOUR128.
5432 31. Small patch to Sieve code - explicitly set From: when generating an
5435 32. Exim crashed if a remote delivery caused a very long error message to be
5436 recorded - for instance if somebody sent an entire SpamAssassin report back
5437 as a large number of 550 error lines. This bug was coincidentally fixed by
5438 increasing the size of one of Exim's internal buffers (big_buffer) that
5439 happened as part of the Exiscan merge. However, to be on the safe side, I
5440 have made the code more robust (and fixed the comments that describe what
5443 33. Some experimental protocols are using DNS PTR records for new purposes. The
5444 keys for these records are domain names, not reversed IP addresses. The
5445 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5446 leaves it alone. Component reversal etc. now happens only for IP addresses.
5449 34. The host_aton() function is supposed to be passed a string that is known
5450 to be a valid IP address. However, in the case of IPv6 addresses, it was
5451 not checking this. This is a hostage to fortune. Exim now panics and dies
5452 if the condition is not met. A case was found where this could be provoked
5453 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5454 components; fortuitously, this particular loophole had already been fixed
5455 by change 4.50/55 or 4.44/33 above.
5457 If there are any other similar loopholes, the new check in host_aton()
5458 itself should stop them being exploited. The report I received stated that
5459 data on the command line could provoke the exploit when Exim was running as
5460 exim, but did not say which command line option was involved. All I could
5461 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5462 running as the user.
5465 35. There was a buffer overflow vulnerability in the SPA authentication code
5466 (which came originally from the Samba project). I have added a test to the
5467 spa_base64_to_bits() function which I hope fixes it.
5470 36. The daemon start-up calls getloadavg() while still root for those OS that
5471 need the first call to be done as root, but it missed one case: when
5472 deliver_queue_load_max is set with deliver_drop_privilege. This is
5473 necessary for the benefit of the queue runner, because there is no re-exec
5474 when deliver_drop_privilege is set.
5476 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5477 was in use, was not putting the data itself into the right store pool;
5478 consequently, it could be overwritten for a subsequent message in the same
5479 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5482 38. Sometimes the final signoff response after QUIT could fail to get
5483 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5484 < 0 before doing a fflush(). This bug looks as though it goes back to the
5485 introduction of TLS in release 3.20, but "sometimes" must have been rare
5486 because the tests only now provoked it.
5492 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5493 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5494 Now it returns an integer. A number of calls were still expecting a T/F
5495 return. Fortuitously, in all cases, the tests worked in OK situations,
5496 which is the norm. However, things would have gone wrong on any write
5497 failures on the smtp file descriptor. This function is used when sending
5498 messages over SMTP and also when doing verify callouts.
5500 2. When Exim is called to do synchronous delivery of a locally submitted
5501 message (the -odf or -odi options), it no longer closes stderr before doing
5504 3. Implemented the mua_wrapper option.
5506 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5508 5. Implemented the functions header_remove(), header_testname(),
5509 header_add_at_position(), and receive_remove_recipient(), and exported them
5512 6. If an ACL "warn" statement specified the addition of headers, Exim already
5513 inserted X-ACL-Warn: at the start if there was no header name. However, it
5514 was not making this test for the second and subsequent header lines if
5515 there were newlines in the string. This meant that an invalid header could
5516 be inserted if Exim was badly configured.
5518 7. Allow an ACL "warn" statement to add header lines at the start or after all
5519 the Received: headers, as well as at the end.
5521 8. Added the rcpt_4xx retry error code.
5523 9. Added postmaster_mailfrom=xxx to callout verification option.
5525 10. Added mailfrom=xxxx to the callout verification option, for verify=
5528 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5529 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5531 12. Inserted some casts to stop certain compilers warning when using pointer
5532 differences as field lengths or precisions in printf-type calls (mostly
5533 affecting debugging statements).
5535 13. Added optional readline() support for -be (dynamically loaded).
5537 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5538 same clock tick as a message's arrival, so that its received time was the
5539 same as the "first fail" time on the retry record, and that message
5540 remained on the queue past the ultimate address timeout, every queue runner
5541 would try a delivery (because it was past the ultimate address timeout) but
5542 after another failure, the ultimate address timeout, which should have then
5543 bounced the address, did not kick in. This was a "< instead of <=" error;
5544 in most cases the first failure would have been in the next clock tick
5545 after the received time, and all would be well.
5547 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5548 being recognized when the domain list was tested by the match_domain
5549 condition in an expansion string.
5551 16. Added the ${str2b64: operator.
5553 17. Exim was always calling setrlimit() to set a large limit for the number of
5554 processes, without checking whether the existing limit was already
5555 adequate. (It did check for the limit on file descriptors.) Furthermore,
5556 errors from getrlimit() and setrlimit() were being ignored. Now they are
5557 logged to the main and panic logs, but Exim does carry on, to try to do its
5558 job under whatever limits there are.
5560 18. Imported PCRE 5.0.
5562 19. Trivial typo in log message " temporarily refused connection" (the leading
5565 20. If the log selector return_path_on_delivery was set and an address was
5566 redirected to /dev/null, the delivery process crashed because it assumed
5567 that a return path would always be set for a "successful" delivery. In this
5568 case, the whole delivery is bypassed as an optimization, and therefore no
5571 21. Internal re-arrangement: the function for sending a challenge and reading
5572 a response while authentication was assuming a zero-terminated challenge
5573 string. It's now changed to take a pointer and a length, to allow for
5574 binary data in such strings.
5576 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5578 23. Exim was not respecting finduser_retries when seeking the login of the
5579 uid under which it was called; it was always trying 10 times. (The default
5580 setting of finduser_retries is zero.) Also, it was sleeping after the final
5581 failure, which is pointless.
5583 24. Implemented tls_on_connect_ports.
5585 25. Implemented acl_smtp_predata.
5587 26. If the domain in control=submission is set empty, Exim assumes that the
5588 authenticated id is a complete email address when it generates From: or
5589 Sender: header lines.
5591 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5592 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5593 chown and chgrp in /bin and hostname in /usr/bin.
5595 28. Exim was keeping the "process log" file open after each use, just as it
5596 does for the main log. This opens the possibility of it remaining open for
5597 long periods when the USR1 signal hits a daemon. Occasional processlog
5598 errors were reported, that could have been caused by this. Anyway, it seems
5599 much more sensible not to leave this file open at all, so that is what now
5602 29. The long-running daemon process does not normally write to the log once it
5603 has entered its main loop, and it closes the log before doing so. This is
5604 so that log files can straightforwardly be renamed and moved. However,
5605 there are a couple of unusual error situations where the daemon does write
5606 log entries, and I had neglected to close the log afterwards.
5608 30. The text of an SMTP error response that was received during a remote
5609 delivery was being truncated at 512 bytes. This is too short for some of
5610 the long messages that one sometimes sees. I've increased the limit to
5613 31. It is now possible to make retry rules that apply only when a message has a
5614 specific sender, in particular, an empty sender.
5616 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5617 it possible to be selective about when SMTP synchronization is enforced.
5619 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5621 32. Implemented hosts_connection_nolog.
5623 33. Added an ACL for QUIT.
5625 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5628 35. Added mailbox_size and mailbox_filecount to appendfile.
5630 36. Added control = no_multiline_responses to ACLs.
5632 37. There was a bug in the logic of the code that waits for the clock to tick
5633 in the case where the clock went backwards by a substantial amount such
5634 that the microsecond fraction of "now" was more than the microsecond
5635 fraction of "then" (but the whole seconds number was less).
5637 38. Added support for the libradius Radius client library this is found on
5638 FreeBSD (previously only the radiusclient library was supported).
5644 1. When certain lookups returned multiple values in the form name=value, the
5645 quoting of the values was not always being done properly. Specifically:
5646 (a) If the value started with a double quote, but contained no whitespace,
5648 (b) If the value contained whitespace other than a space character (i.e.
5649 tabs or newlines or carriage returns) it was not quoted.
5650 This fix has been applied to the mysql and pgsql lookups by writing a
5651 separate quoting function and calling it from the lookup code. The fix
5652 should probably also be applied to nisplus, ibase and oracle lookups, but
5653 since I cannot test any of those, I have not disturbed their existing code.
5655 2. A hit in the callout cache for a specific address caused a log line with no
5656 reason for rejecting RCPT. Now it says "Previous (cached) callout
5657 verification failure".
5659 3. There was an off-by-one bug in the queryprogram router. An over-long
5660 return line was truncated at 256 instead of 255 characters, thereby
5661 overflowing its buffer with the terminating zero. As well as fixing this, I
5662 have increased the buffer size to 1024 (and made a note to document this).
5664 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5665 when Exim is waiting for an SMTP response from a remote server, Exim
5666 restarts its select() call on the socket, thereby resetting its timeout.
5667 This is not a problem when such interrupts are rare. Somebody set up a cron
5668 job to run exiwhat every 2 minutes, which is less than the normal select()
5669 timeout (5 or 10 minutes). This meant that the select() timeout never
5670 kicked in because it was always reset. I have fixed this by comparing the
5671 time when an interrupt arrives with the time at the start of the first call
5672 to select(). If more time than the timeout has elapsed, the interrupt is
5673 treated as a timeout.
5675 5. Some internal re-factoring in preparation for the addition of Sieve
5676 extensions (by MH). In particular, the "personal" test is moved to a
5677 separate function, and given an option for scanning Cc: and Bcc: (which is
5678 not set for Exim filters).
5680 6. When Exim created an email address using the login of the caller as the
5681 local part (e.g. when creating a From: or Sender: header line), it was not
5682 quoting the local part when it contained special characters such as @.
5684 7. Installed new OpenBSD configuration files.
5686 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5687 try to make them clearer.
5689 9. Callout options, other than the timeout value, were being ignored when
5690 verifying sender addresses in header lines. For example, when using
5692 verify = header_sender/callout=no_cache
5694 the cache was (incorrectly) being used.
5696 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5697 only the Cygwin environment.
5699 11. When return_path_on_delivery was set as a log selector, if different remote
5700 addresses in the same message used different return paths and parallel
5701 remote delivery occurred, the wrong values would sometimes be logged.
5702 (Whenever a remote delivery process finished, the return path value from
5703 the most recently started remote delivery process was logged.)
5705 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5706 lines when AUTH and/or TLS are in use. This is the "received protocol"
5707 field. Exim used to use "asmtp" for authenticated SMTP, without any
5708 indication (in the protocol name) for TLS use. Now it follows the RFC and
5709 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5710 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5711 names appear in log lines as well as in Received: header lines.
5713 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5714 extensions, and comparison tests, and to fix some bugs.
5716 14. Changes to the "personal" filter test:
5718 (1) The test was buggy in that it was just doing the equivalent of
5719 "contains" tests on header lines. For example, if a user's address was
5720 anne@some.where, the "personal" test would incorrectly be true for
5722 To: susanne@some.where
5724 This test is now done by extracting each address from the header in turn,
5725 and checking the entire address. Other tests that are part of "personal"
5726 are now done using regular expressions (for example, to check local parts
5727 of addresses in From: header lines).
5729 (2) The list of non-personal local parts in From: addresses has been
5730 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5731 taken from the Sieve specification recommendations.
5733 (3) If the message contains any header line starting with "List-" it is
5734 treated as non-personal.
5736 (4) The test for "circular" in the Subject: header line has been removed
5737 because it now seems ill-conceived.
5739 15. Minor typos in src/EDITME comments corrected.
5741 16. Installed latest exipick from John Jetmore.
5743 17. If headers_add on a router specified a text string that was too long for
5744 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5745 of string_sprintf() is now avoided.
5747 18. $message_body_size was not set (it was always zero) when running the DATA
5748 ACL and the local_scan() function.
5750 19. For the "mail" command in an Exim filter, no default was being set for
5751 the once_repeat time, causing a random time value to be used if "once" was
5752 specified. (If the value happened to be <= 0, no repeat happened.) The
5753 default is now 0s, meaning "never repeat". The "vacation" command was OK
5754 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5755 (I found it when inspecting the code).
5757 20. There is now an overall timeout for performing a callout verification. It
5758 defaults to 4 times the callout timeout, which applies to individual SMTP
5759 commands during the callout. The overall timeout applies when there is more
5760 than one host that can be tried. The timeout is checked before trying the
5761 next host. This prevents very long delays if there are a large number of
5762 hosts and all are timing out (e.g. when the network connections are timing
5763 out). The value of the overall timeout can be changed by specifying an
5764 additional sub-option for "callout", called "maxwait". For example:
5766 verify = sender/callout=5s,maxwait=20s
5768 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5769 to the end before writing, but this should make it even safer).
5771 22. Exim was forgetting that it had advertised PIPELINING for the second and
5772 subsequent messages on an SMTP connection. It was also not resetting its
5773 memory on STARTTLS and an internal HELO.
5775 23. When Exim logs an SMTP synchronization error within a session, it now
5776 records whether PIPELINING has been advertised or not.
5778 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5779 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5780 rather than long int.
5782 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5784 26. Added the never_mail option to autoreply.
5790 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5791 crash if the getsockname() call failed; this can happen if a connection is
5792 closed very soon after it is established. The problem was simply in the
5793 order in which certain operations were done, causing Exim to try to write
5794 to the SMTP stream before it had set up the file descriptor. The bug has
5795 been fixed by making things happen in the correct order.
5801 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5802 before the connection was closed, thus losing the rejection response.
5804 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5805 some early Solaris releases, but causes trouble in current releases where
5806 socklen_t is defined.
5808 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5811 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5814 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5815 that releasing the top of it at the end releases what was used for sub-
5816 expansions (unless the block got too big). However, discard this block if
5817 the first thing is a variable or header, so that we can use its block when
5818 it is dynamic (useful for very large $message_headers, for example).
5820 6. Lookups now cache *every* query, not just the most recent. A new, separate
5821 store pool is used for this. It can be recovered when all lookup caches are
5822 flushed. Lookups now release memory at the end of their result strings.
5823 This has involved some general refactoring of the lookup sources.
5825 7. Some code has been added to the store_xxx() functions to reduce the amount
5826 of flapping under certain conditions.
5828 8. log_incoming_interface used to affect only the <= reception log lines. Now
5829 it causes the local interface and port to be added to several more SMTP log
5830 lines, for example "SMTP connection from", and rejection lines.
5832 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5834 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5836 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5837 could be overwritten at the end of the current message (or the start of a
5838 new message if it was set in a HELO ACL). The value is now preserved for
5839 the duration of the SMTP connection.
5841 12. If a transport had a headers_rewrite setting, and a matching header line
5842 contained an unqualified address, that address was qualified, even if it
5843 did not match any rewriting rules. The underlying bug was that the values
5844 of the flags that permit the existence of unqualified sender and recipient
5845 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5846 non-local messages, and by -bnq for local messages) were not being
5847 preserved with the message after it was received.
5849 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5850 "next input=" as part of the text comprising the host identity instead of
5851 the correct text. The code was using the same buffer for two different
5852 strings. However, depending on which order the printing function evaluated
5853 its arguments, the bug did not always show up. Under Linux, for example, my
5854 test suite worked just fine.
5856 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5857 doesn't work with some older versions of Perl. It has been changed to "my",
5858 which in any case is probably the better facility to use.
5860 15. A really picky compiler found some instances of statements for creating
5861 error messages that either had too many or two few arguments for the format
5864 16. The size of the buffer for calls to the DNS resolver has been increased
5865 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5866 for addresses that have a lot of PTR records. This alleviates a problem; it
5867 does not fully solve it.
5869 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5870 buffer now truncates the list and logs the incident, which is the same
5871 action as happens when Exim is looking up a host name and its aliases.
5872 Previously in this situation something unpredictable would happen;
5873 sometimes it was "internal error: store_reset failed".
5875 18. If a server dropped the connection unexpectedly when an Exim client was
5876 using GnuTLS and trying to read a response, the client delivery process
5877 crashed while trying to generate an error log message.
5879 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5880 string, for example:
5882 warn message = H1: something\nH2: something
5884 the text was added as a single header line from Exim's point of view
5885 though it ended up OK in the delivered message. However, searching for the
5886 second and subsequent header lines using $h_h2: did not work. This has been
5887 fixed. Similarly, if a system filter added multiple headers in this way,
5888 the routers could not see them.
5890 20. Expanded the error message when iplsearch is called with an invalid key to
5891 suggest using net-iplsearch in a host list.
5893 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5894 ACLs are no longer actually imposed (and a message to that effect is
5897 22. If a "gecos" field in a passwd entry contained escaped characters, in
5898 particular, if it contained a \" sequence, Exim got it wrong when building
5899 a From: or a Sender: header from that name. A second bug also caused
5900 incorrect handling when an unquoted " was present following a character
5901 that needed quoting.
5903 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5904 was not being matched caselessly.
5906 24. Arranged for all hyphens in the exim.8 source to be escaped with
5909 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5910 properly. Recipient callout cache records were still being keyed to include
5911 the sender, even when use_sender was set false. This led to far more
5912 callouts that were necessary. The sender is no longer included in the key
5913 when use_sender is false.
5915 26. Added "control = submission" modifier to ACLs.
5917 27. Added the ${base62d: operator to decode base 62 numbers.
5919 28. dnsdb lookups can now access SRV records.
5921 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5922 the configuration file.
5924 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5925 (-v) mode. This makes the output for a verbose queue run more intelligible.
5927 31. Added a use_postmaster feature to recipient callouts.
5929 32. Added the $body_zerocount variable, containing the number of binary zero
5930 bytes in the message body.
5932 33. The time of last modification of the "new" subdirectory is now used as the
5933 "mailbox time last read" when there is a quota error for a maildir
5936 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5938 35. Added +ignore_unknown as a special item in host lists.
5940 36. Code for decoding IPv6 addresses in host lists is now included, even if
5941 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5942 address was recognized as an IP address, but was then not correctly decoded
5943 into binary, causing unexpected and incorrect effects when compared with
5950 1. Very minor rewording of debugging text in manualroute to say "list of
5951 hosts" instead of "hostlist".
5953 2. If verify=header_syntax was set, and a header line with an unqualified
5954 address (no domain) and a large number of spaces between the end of the
5955 name and the colon was received, the reception process suffered a buffer
5956 overflow, and (when I tested it) crashed. This was caused by some obsolete
5957 code that should have been removed. The fix is to remove it!
5959 3. When running in the test harness, delay a bit after writing a bounce
5960 message to get a bit more predictability in the log output.
5962 4. Added a call to search_tidyup() just before forking a reception process. In
5963 theory, someone could use a lookup in the expansion of smtp_accept_max_
5964 per_host which, without the tidyup, could leave open a database connection.
5966 5. Added the variables $recipient_data and $sender_data which get set from a
5967 lookup success in an ACL "recipients" or "senders" condition, or a router
5968 "senders" option, similar to $domain_data and $local_part_data.
5970 6. Moved the writing of debug_print from before to after the "senders" test
5973 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5974 problems for message scanning, either using a data ACL, or using
5975 local_scan() because the Received: header was not generated till after they
5976 were called (in order to set the time as the time of reception completion).
5977 I have revised the way this works. The header is now generated after the
5978 body is received, but before the ACL or local_scan() are called. After they
5979 are run, the timestamp in the header is updated.
5985 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5986 before starting a queue runner without re-exec. This happened only when
5987 deliver_drop_privilege was set or when the Exim user was set to root. The
5988 effect of the bug was that timeouts during subsequent deliveries caused
5989 crashes instead of being properly handled. The handler is now left at its
5990 default (and expected) setting.
5992 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5993 message, again when deliver_drop_privilege is set or Exim is run as root.
5994 The bug described in (1) was not present in this case, but the tidying up
5995 of the other signals was missing. I have made the two cases consistent.
5997 3. The ignore_target_hosts setting on a manualroute router was being ignored
5998 for hosts that were looked up using the /MX notation.
6000 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6003 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6004 operated on the sender address. After changing the $sender_address to <>
6005 for the sender address verify, Exim was re-instated it as the original
6006 (before rewriting) address, but remembering that it had rewritten it, so it
6007 wasn't rewriting it again. This bug also had the effect of breaking the
6008 sender address verification caching when the sender address was rewritten.
6010 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6011 This has been changed so that if the ip literal address matches
6012 ignore_target_hosts, the router declines.
6014 7. Added expansion conditions match_domain, match_address, and match_local_
6015 part (NOT match_host).
6017 8. The placeholder for the Received: header didn't have a length field set.
6019 9. Added code to Exim itself and to exim_lock to test for a specific race
6020 condition that could lead to file corruption when using MBX delivery. The
6021 issue is with the lockfile that is created in /tmp. If this file is removed
6022 after a process has opened it but before that process has acquired a lock,
6023 there is the potential for a second process to recreate the file and also
6024 acquire a lock. This could lead to two Exim processes writing to the file
6025 at the same time. The added code performs the same test as UW imapd; it
6026 checks after acquiring the lock that its file descriptor still refers to
6027 the same named file.
6029 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6030 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6033 11. Added the smtp_active_hostname option. If used, this will typically be made
6034 to depend on the incoming interface address. Because $interface_address is
6035 not set up until the daemon has forked a reception process, error responses
6036 that can happen earlier (such as "too many connections") no longer contain
6039 12. If an expansion in a condition on a "warn" statement fails because a lookup
6040 defers, the "warn" statement is abandoned, and the next ACL statement is
6041 processed. Previously this caused the whole ACL to be aborted.
6043 13. Added the iplsearch lookup type.
6045 14. Added ident_timeout as a log selector.
6047 15. Added tls_certificate_verified as a log selector.
6049 16. Added a global option tls_require_ciphers (compare the smtp transport
6050 option of the same name). This controls incoming TLS connections.
6052 17. I finally figured out how to make tls_require_ciphers do a similar thing
6053 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6054 before starting the TLS session.
6056 18. Tabs are now shown as \t in -bP output.
6058 19. If the log selector return_path_on_delivery was set, Exim crashed when
6059 bouncing a message because it had too many Received: header lines.
6061 20. If two routers both had headers_remove settings, and the first one included
6062 a superfluous trailing colon, the final name in the first list and the
6063 first name in the second list were incorrectly joined into one item (with a
6064 colon in the middle).
6070 1. Added -C and -D options to the exinext utility, mainly to make it easier
6071 to include in the automated testing, but these could be helpful when
6072 multiple configurations are in use.
6074 2. The exinext utility was not formatting the output nicely when there was
6075 an alternate port involved in the retry record key, nor when there was a
6076 message id as well (for retries that were specific to a specific message
6077 and a specific host). It was also confused by IPv6 addresses, because of
6078 the additional colons they contain. I have fixed the IPv4 problem, and
6079 patched it up to do a reasonable job for IPv6.
6081 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6082 delivery, the log line now contains "pipelined" if PIPELINING was used.
6084 4. An SMTP transport process used to panic and die if the bind() call to set
6085 an explicit outgoing interface failed. This has been changed; it is now
6086 treated in the same way as a connect() failure.
6088 5. A reference to $sender_host_name in the part of a conditional expansion
6089 that was being skipped was still causing a DNS lookup. This no longer
6092 6. The def: expansion condition was not recognizing references to header lines
6093 that used bh_ and bheader_.
6095 7. Added the _cache feature to named lists.
6097 8. The code for checking quota_filecount in the appendfile transport was
6098 allowing one more file than it should have been.
6100 9. For compatibility with Sendmail, the command line option
6108 and sets the incoming protocol and host name (for trusted callers). The
6109 host name and its colon can be omitted when only the protocol is to be set.
6110 Note the Exim already has two private options, -pd and -ps, that refer to
6111 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6112 "s", but I don't think that's a major issue.
6114 10. A number of refactoring changes to the code, none of which should affect
6117 (a) The number of logging options was getting close to filling up the
6118 32-bit word that was used as a bit map. I have split them into two classes:
6119 those that are passed in the argument to log_write(), and those that are
6120 only ever tested independently outside of that function. These are now in
6121 separate 32-bit words, so there is plenty of room for expansion again.
6122 There is no change in the user interface or the logging behaviour.
6124 (b) When building, for example, log lines, the code previously used a
6125 macro that called string_cat() twice, in order to add two strings. This is
6126 not really sufficiently general. Furthermore, there was one instance where
6127 it was actually wrong because one of the argument was used twice, and in
6128 one call a function was used. (As it happened, calling the function twice
6129 did not affect the overall behaviour.) The macro has been replaced by a
6130 function that can join an arbitrary number of extra strings onto a growing
6133 (c) The code for expansion conditions now uses a table and a binary chop
6134 instead of a serial search (which was left over from when there were very
6135 few conditions). Also, it now recognizes conditions like "pam" even when
6136 the relevant support is not compiled in: a suitably worded error message is
6137 given if an attempt is made to use such a condition.
6139 11. Added ${time_interval:xxxxx}.
6141 12. A bug was causing one of the ddress fields not to be passed back correctly
6142 from remote delivery subprocesses. The field in question was not being
6143 subsequently used, so this caused to problems in practice.
6145 13. Added new log selectors queue_time and deliver_time.
6147 14. Might have fixed a bug in maildirsizefile handling that threw up
6148 "unexpected character" debug warnings, and recalculated the data
6149 unnecessarily. In any case, I expanded the warning message to give more
6152 15. Added the message "Restricted characters in address" to the statements in
6153 the default ACL that block characters like @ and % in local parts.
6155 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6156 Three changes have been made:
6158 (a) There was a serious bug; a negative response to MAIL caused the whole
6159 recipient domain to be cached as invalid, thereby blocking all messages
6160 to all local parts at the same domain, from all senders. This bug has
6161 been fixed. The domain is no longer cached after a negative response to
6162 MAIL if the sender used is not empty.
6164 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6167 (c) A new callout option, "use_sender" has been added for people who want
6168 the modified behaviour.
6174 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6177 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6178 indeed breaks things for older releases.
6180 3. Added additional logging to the case where there is a problem reading data
6181 from a filter that is running in a subprocess using a pipe, in order to
6182 try to track down a specific problem.
6184 4. Testing facility fudge: when running in the test harness and attempting
6185 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6186 getting "No route to host". Convert this to a timeout.
6188 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6191 6. Some OS don't have socklen_t but use size_t instead. This affects the
6192 fifth argument of getsockopt() amongst other things. This is now
6193 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6194 can be set for individual OS. I have set it for SunOS5, OSF1, and
6195 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6196 some earlier ones do not.
6198 7. Change 4.30/15 was not doing the test caselessly.
6200 8. The standard form for an IPv6 address literal was being rejected by address
6201 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6202 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6203 this, as well as the form without the "IPv6" on the front (but only when
6204 address literals are enabled, of course).
6206 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6208 10. Exim crashed if a message with an empty sender address specified by -f
6209 encountered a router with an errors_to setting. This could be provoked only
6210 by a command such as
6214 where an empty string was supplied; "<>" did not hit this bug.
6216 11. Installed PCRE release 4.5.
6218 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6219 remained set. It is now erased.
6221 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6222 times from message ids (which are base 36 rather than the normal 62).
6224 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6225 were being counted as actual protocol errors, and logged if the log
6226 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6227 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6228 and DATA following a set of rejected RCPTs do not count as protocol errors.
6229 In other words, Exim assumes they were pipelined, though this may not
6230 actually be the case. Of course, in all cases the client gets an
6231 appropriate error code.
6233 15. If a lookup fails in an ACL condition, a message about the failure may
6234 be available; it is used if testing the ACL cannot continue, because most
6235 such messages specify what the cause of the deferral is. However, some
6236 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6237 that caused an old message to be retained and used if a later statement
6238 caused a defer, replacing the real cause of the deferral.
6240 16. If an IP address had so many PTR records that the DNS lookup buffer
6241 was not large enough to hold them, Exim could crash while trying to process
6242 the truncated data. It now detects and logs this case.
6244 17. Further to 4.21/58, another change has been made: if (and only if) the
6245 first line of a message (the first header line) ends with CRLF, a bare LF
6246 in a subsequent header line has a space inserted after it, so as not to
6247 terminate the header.
6249 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6250 unnecessarily, used atoi() instead of strtol(), and didn't check the
6251 termination when getting file sizes from file names by regex.
6253 19. Completely re-implemented the support for maildirsize files, in the light
6254 of a number of problems with the previous contributed implementation
6255 (4.30/29). In particular:
6257 . If the quota is zero, the maildirsize file is maintained, but no quota is
6260 . If the maildir directory does not exist, it is created before any attempt
6261 to write a maildirsize file.
6263 . The quota value in the file is just a cache; if the quota is changed in
6264 the transport, the new value overrides.
6266 . A regular expression is available for excluding directories from the
6269 20. The autoreply transport checks the characters in options that define the
6270 message's headers; it allows continued headers, but it was checking with
6271 isspace() after an embedded newline instead of explicitly looking for a
6274 21. If all the "regular" hosts to which an address was routed had passed their
6275 expiry times, and had not reached their retry times, the address was
6276 bounced, even if fallback hosts were defined. Now Exim should go on to try
6279 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6280 equivalent code in the SMTP transport. Some hosts send humungous responses
6281 to HELO/EHLO, more than 1024 it seems.
6283 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6284 gives compiler warnings in some environments. I've now done it "properly",
6287 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6288 (because of problems with the built-in one) was declared to return uschar *
6289 instead of char *, causing compiler failure.
6291 25. Fixed a file descriptor leak when processing alias/forward files.
6293 26. Fixed a minor format string issue in dbfn.c.
6295 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6297 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6298 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6301 29. When a sender address is verified, it is cached, to save repeating the test
6302 when there is more than one recipient in a message. However, when the
6303 verification involves a callout, it is possible for different callout
6304 options to be set for different recipients. It is too complicated to keep
6305 track of this in the cache, so now Exim always runs a verification when a
6306 callout is required, relying on the callout cache for the optimization.
6307 The overhead is duplication of the address routing, but this should not be
6310 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6311 to be verified with callout=postmaster, and the main callout worked but the
6312 postmaster check failed, the verification correctly failed. However, if a
6313 subsequent RCPT command asked for sender verification *without* the
6314 postmaster check, incorrect caching caused this verification also to fail,
6317 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6318 it was not caching the DNS options (qualify_single, search_parents) that
6319 were used when the lookup failed. A subsequent lookup with different
6320 options therefore always gave the same answer, though there were cases
6321 where it should not have. (Example: a "domains = !$mx_any" option on a
6322 dnslookup router: the "domains" option is always processed without any
6323 widening, but the router might have qualify_single set.) Now Exim uses the
6324 cached value only when the same options are set.
6326 32. Added John Jetmore's "exipick" utility to the distribution.
6328 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6329 than a timeout (e.g. a certificate is required, and is not provided), an
6330 Exim server now closes the connection immediately. Previously it waited for
6331 the client to close - but if the client is SSL, it seems that they each
6332 wait for each other, leading to a delay before one of them times out.
6334 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6335 maintained 0.8.x compatibility because I don't think many are using it, and
6336 it is clearly obsolete.
6338 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6341 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6342 client certificate was expired. A simple patch fixes this, though I don't
6343 understand the full logic of why the verify callback is called multiple
6346 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6347 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6348 which causes problems with some clients (such as the Certicom SSL Plus
6349 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6350 disables the coutermeasure allowing Eudora to connect."
6352 38. Exim was not checking that a write() to a log file succeeded. This could
6353 lead to Bad Things if a log got too big, in particular if it hit a file
6354 size limit. Exim now panics and dies if it cannot write to a log file, just
6355 as it does if it cannot open a log file.
6357 39. Modified OS/Makefile-Linux so that it now contains
6359 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6361 The two -D definitions ensure that Exim is compiled with large file
6362 support, which makes it possible to handle log files that are bigger than
6365 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6366 instance) a domain was checked against a named list that involved a lookup,
6367 causing $domain_data to be set, then another domain was checked against the
6368 same list, then the first domain was re-checked, the value of $domain_data
6369 after the final check could be wrong. In particular, if the second check
6370 failed, it could be set empty. This bug probably also applied to
6373 41. The strip_trailing_dot option was not being applied to the address given
6374 with the -f command-line option.
6376 42. The code for reading a message's header from the spool was incrementing
6377 $received_count, but never initializing it. This meant that the value was
6378 incorrect (doubled) while delivering a message in the same process in which
6379 it was received. In the most common configuration of Exim, this never
6380 happens - a fresh exec is done - but it can happen when
6381 deliver_drop_privilege is set.
6383 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6384 it now includes up to 150 characters of the unexpected data in the log
6387 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6388 and building data strings. The size of both of these buffers was 10 000
6389 bytes - far larger than anybody would *ever* want, thought I. Needless to
6390 say, somebody hit the limit. I have increased the maximum line length to
6391 20 000 and the maximum data length of concatenated lines to 100 000. I have
6392 also fixed two bugs, because there was no checking on these buffers. Tsk,
6393 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6394 buffer is too small.
6396 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6397 lsearch lookups. Now it does.
6399 46. When parsing a route_list item in a manualroute router, a fixed-length
6400 buffer was used for the list of hosts. I made this 1024 bytes long,
6401 thinking that nobody would ever have a list of hosts that long. Wrong.
6402 Somebody had a whole pile of complicated expansion conditions, and the
6403 string was silently truncated, leading to an expansion error. It turns out
6404 that it is easier to change to an unlimited length (owing to other changes
6405 that have happened since this code was originally written) than to build
6406 structure for giving a limitation error. The length of the item that
6407 expands into the list of hosts is now unlimited.
6409 47. The lsearch lookup could not handle data where the length of text line was
6410 more than 4095 characters. Such lines were truncated, leading to shortened
6411 data being returned. It should now handle lines of any length.
6413 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6414 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6417 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6418 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6419 no longer happens in comment lines. A list of replacements is now placed
6420 at the head of all of the source files, except those whose only change is
6421 to replace PERL_COMMAND in the very first #! line.
6423 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6424 messages on the queue, with a bottom-up merge sort, using code contributed
6425 by Michael Haardt. This should make operations like -bp somewhat faster on
6426 large queues. It won't affect queue runners, except when queue_run_in_order
6429 51. Installed eximstats 1.31 in the distribution.
6431 52. Added support for SRV lookups to the dnslookup router.
6433 53. If an ACL referred to $message_body or $message_body_end, the value was not
6434 reset for any messages that followed in the same SMTP session.
6436 54. The store-handling optimization for building very long strings was not
6437 differentiating between the different store pools. I don't think this
6438 actually made any difference in practice, but I've tidied it.
6440 55. While running the routers to verify a sender address, $sender_address
6441 was still set to the sender address. This is wrong, because when routing to
6442 send a bounce to the sender, it would be empty. Therefore, I have changed
6443 it so that, while verifying a sender address, $sender_address is set to <>.
6444 (There is no change to what happens when verifying a recipient address.)
6446 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6447 target A or AAAA records (if not already returned) without resetting the
6448 qualify_single or search_parents options of the DNS resolver. These are
6449 inappropriate in this case because the targets of MX and SRV records must
6450 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6451 target that, when qualified, matched something in the local domain. These
6452 two options are now turned off when doing these lookups.
6454 57. It seems that at least some releases of Reiserfs (which does not have the
6455 concept of a fixed number of inodes) returns zero and not -1 for the
6456 number of available inodes. This interacted badly with check_spool_inodes,
6457 which assumed that -1 was the "no such thing" setting. What I have done is
6458 to check that the total number of inodes is greater than zero before doing
6459 the test of how many are available.
6461 58. When a "warn" ACL statement has a log_message modifier, the message is
6462 remembered, and not repeated. This is to avoid a lot of repetition when a
6463 message has many recipients that cause the same warning to be written.
6464 However, Exim was preserving the list of already written lines for an
6465 entire SMTP session, which doesn't seem right. The memory is now reset if a
6466 new message is started.
6468 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6469 debugging output unless log_rewrite was also set.
6471 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6472 of (int)(handle) when we know that handle contains (void *)(-1).
6474 61. The Exim daemon panic-logs an error return when it closes the incoming
6475 connection. However "connection reset by peer" seems to be common, and
6476 isn't really an error worthy of noting specially, so that particular error
6479 62. When Exim is trying to find all the local interfaces, it used to panic and
6480 die if the ioctl to get the interface flags failed. However, it seems that
6481 on at least one OS (Solaris 9) it is possible to have an interface that is
6482 included in the list of interfaces, but for which you get a failure error
6483 for this call. This happens when the interface is not "plumbed" into a
6484 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6485 failure of the "get flags" call assumes that the interface is down.
6487 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6488 makes life easier for people who are doing arithmetic on fields extracted
6489 from dates, where you often get leading zeros that should not be
6490 interpreted as octal.
6492 64. Added qualify_domain to the redirect router, to override the global
6495 65. If a pathologically long header line contained very many addresses (the
6496 report of this problem mentioned 10 000) and each of them was rewritten,
6497 Exim could use up a very large amount of memory. (It kept on making new
6498 copies of the header line as it rewrote, and never released the old ones.)
6499 At the expense of a bit more processing, the header rewriting function has
6500 been changed so that it no longer eats memory in this way.
6502 66. The generation of the Received: header has been moved from the time that a
6503 message starts to be received, to the time that it finishes. The timestamp
6504 in the Received: header should now be very close to that of the <= log
6505 line. There are two side-effects of this change:
6507 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6508 logged header lines no longer include the local Received: line, because
6509 it has not yet been created. The same applies to a copy of the message
6510 that is returned to a non-SMTP sender when a message is rejected.
6512 (b) When a filter file is tested using -bf, no additional Received: header
6513 is added to the test message. After some thought, I decided that this
6516 This change does not affect the value of $received_for. It is still set
6517 after address rewriting, but before local_scan() is called.
6519 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6521 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6522 gave an unhelpful panic error message, and a defer error. I have managed to
6523 change this behaviour so that it now rejects any supplied certificate,
6524 which seems right, as the list of acceptable certificates is empty.
6526 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6527 gave an unhelpful defer error. I have not managed to make this reject any
6528 supplied certificates, but the error message it gives is "no certificate
6529 supplied", which is not helpful.
6531 70. exigrep's output now also includes lines that are not associated with any
6532 message, but which match the given pattern. Implemented by a patch from
6533 Martin Sluka, which also tidied up the Perl a bit.
6535 71. Recipient callout verification, like sender verification, was using <> in
6536 the MAIL FROM command. This isn't really the right thing, since the actual
6537 sender may affect whether the remote host accepts the recipient or not. I
6538 have changed it to use the actual sender in the callout; this means that
6539 the cache record is now keyed on a recipient/sender pair, not just the
6540 recipient address. There doesn't seem to be a real danger of callout loops,
6541 since a callout by the remote host to check the sender would use <>.
6542 [SEE ABOVE: changed after hitting problems.]
6544 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6545 temporary errors. However, in the case of such a code being given after
6546 the end of a data transmission (i.e. after ".") Exim was failing to write
6547 a retry record for the message. (Yes, there was some broken host that was
6548 actually sending 8xx at this point.)
6550 73. An unknown lookup type in a host list could cause Exim to panic-die when
6551 the list was checked. (An example that provoked this was putting <; in the
6552 middle of a list instead of at the start.) If this happened during a DATA
6553 ACL check, a -D file could be left lying around. This kind of configuration
6554 error no longer causes Exim to die; instead it causes a defer error. The
6555 incident is still logged to the main and panic logs.
6557 74. Buglet left over from Exim 3 conversion. The message "too many messages
6558 in one connection" was written to the rejectlog but not the mainlog, except
6559 when address rewriting (yes!) was being logged.
6561 75. Added write_rejectlog option.
6563 76. When a system filter was run not as root (that is, when system_filter_user
6564 was set), the values of the $n variables were not being returned to the
6565 main process; thus, they were not subsequently available in the $sn
6568 77. Added +return_path_on_delivery log selector.
6570 78. A connection timeout was being treated differently from recipients deferred
6571 when testing hosts_max_try with a message that was older than the host's
6572 retry timeout. (The host should not be counted, thus allowing all hosts to
6573 be tried at least once before bouncing.) This may have been the cause of an
6574 occasionally reported bug whereby a message would remain on the queue
6575 longer than the retry timeout, but would be bounced if a delivery was
6576 forced. I say "may" because I never totally pinned down the problem;
6577 setting up timeout/retry tests is difficult. See also the next item.
6579 79. The ultimate address timeout was not being applied to errors that involved
6580 a combination of host plus message (for example, a timeout on a MAIL
6581 command). When an address resolved to a number of possible hosts, and they
6582 were not all tried for each delivery (e.g. because of hosts_max_try), a
6583 message could remain on the queue longer than the retry timeout.
6585 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6588 81. Fixed an obscure SMTP outgoing bug which required at least the following
6589 conditions: (a) there was another message waiting for the same server;
6590 (b) the server returned 5xx to all RCPT commands in the first message so
6591 that the message was not completed; (c) the server dropped the connection
6592 or gave a negative response to the RSET that Exim sends to abort the
6593 transaction. The observed case was a dropped connection after DATA that had
6594 been sent in pipelining mode. That is, the server had advertised PIPELINING
6595 but was not implementing it correctly. The effect of the bug was incorrect
6596 behaviour, such as trying another host, and this could lead to a crash.
6602 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6603 and daemon.c were passed as pointers to ints; they should have been
6604 pointers to socklen_t variables (which are typically unsigned ints).
6606 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6609 3. Fixed a really odd bug that affected only the testing scheme; patching a
6610 certain fixed string in the binary changed the value of another string that
6611 happened to be identical to the end of the original first string.
6613 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6614 name", it returns that address as the IP address. On some operating
6615 systems (e.g. Solaris), it also passes back the IP address string as the
6616 "host name". However, on others (e.g. Linux), it passes back an empty
6617 string. Exim wasn't checking for this, and was changing the host name to an
6618 empty string, assuming it had been canonicalized.
6620 5. Although rare, it is permitted to have more than one PTR record for a given
6621 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6622 all the names associated with an address, because they do in Solaris.
6623 However, it seems that they do not in Linux for data that comes from the
6624 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6625 I found this out when I moved to a new Linux workstation and tried to run
6626 the Exim test suite.
6628 To get round this problem I have changed the code so that it now does its
6629 own call to the DNS to look up PTR records when searching for a host name.
6630 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6631 addresses that are only in /etc/hosts are still found.
6633 This behaviour is, however, controlled by an option called host_lookup_
6634 order, which defaults to "bydns:byaddr". If people want to use the other
6635 order, or indeed, just use one or the other means of lookup, they can
6636 specify it in this variable.
6638 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6639 some operating systems, this comes back from gethostbyaddr() as an empty
6640 string, and this is what Exim used to test for. However, it seems that in
6641 other systems, "." is yielded. Exim now tests for this case too.
6643 7. The values of check_spool_space and check_log_space are now held internally
6644 as a number of kilobytes instead of an absolute number of bytes. If a
6645 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6646 kilobyte. This means that much larger values can be stored.
6648 8. Exim monitor: an attempt to get the action menu when not actually pointing
6649 at a message produces an empty menu entitled "No message selected". This
6650 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6651 no entries in it ("Shell widget menu has zero width and/or height"). So I
6652 have added a single, blank menu entry in this case.
6654 9. Added ${quote_local_part.
6656 10. MIME decoding is now applied to the contents of Subject: header lines when
6659 11. Now that a reference to $sender_host_address automatically causes a reverse
6660 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6661 host lookup before query-style lookups in lists that might use this
6662 variable. This has therefore been abolished, and the "net-" prefix is no
6663 longer necessary for query-style lookups.
6665 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6666 have been a typo for LFLAGS, so it has been changed.
6668 13. The install script calls Exim with "-C /dev/null" in order to find the
6669 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6670 to be output. However, since Exim outputs its version number before the
6671 error, it didn't break the script. It just looked ugly. I fixed this by
6672 always allowing "-C /dev/null" if the caller is root.
6674 14. Ignore overlarge ACL variable number when reading spool file - insurance
6675 against a later release with more variables having written the file.
6677 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6678 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6679 this, as well as the form without the "IPv6" on the front.
6681 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6682 OS/Makefile-Darwin file.
6684 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6685 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6687 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6688 variable. However, some OS use ints for inodes. I've added cast to long int
6689 to get rid of the compiler warning.
6691 19. I had forgotten to lock out "/../" in configuration file names when
6692 ALT_CONFIG_PREFIX was set.
6694 20. Routers used for verification do not need to specify transports. However,
6695 if such a router generated a host list, and callout was configured, Exim
6696 crashed, because it could not find a port number from the (non-existent)
6697 transport. It now assumes port 25 in this circumstance.
6699 21. Added the -t option to exigrep.
6701 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6702 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6703 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6704 them is set, LOOKUP_LSEARCH is forced.
6706 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6708 24. Added sender and host information to the "rejected by local_scan()" log
6709 line; previously there was no indication of these.
6711 25. Added .include_if_exists.
6713 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6714 Linux. It turns out that not all file systems support this. Apparently some
6715 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6716 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6717 not supported on the file descriptor, is now ignored when Exim is trying to
6718 sync a directory. This applies only to Linux.
6720 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6722 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6723 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6726 29. Added support for maildirsize files from supplied patch (modified a bit).
6728 30. The use of :fail: followed by an empty string could lead Exim to respond to
6729 sender verification failures with (e.g.):
6731 550 Verification failed for <xxx>
6732 550 Sender verify failed
6734 where the first response line was missing the '-' that indicates it is not
6735 the final line of the response.
6737 31. The loop for finding the name of the user that called Exim had a hardwired
6738 limit of 10; it now uses the value of finduser_retries, which is used for
6739 all other user lookups.
6741 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6744 33. Exim was neglecting to zero errno before one call of strtol() when
6745 expanding a string and expecting an integer value. On some systems this
6746 resulted in spurious "integer overflow" errors. Also, it was casting the
6747 result into an int without checking.
6749 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6750 did not work. The code looks as if it has *never* worked, though it appears
6751 to have been documented since at least release 1.62. I have made it work.
6753 35. The "timeout_DNS" error in retry rules, also documented since at least
6754 1.62, also never worked. As it isn't clear exactly what this means, and
6755 clearly it isn't a major issue, I have abolished the feature by treating it
6756 as "timeout", and writing a warning to the main and panic logs.
6758 36. The display of retry rules for -brt wasn't always showing the error code
6761 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6762 timeout_connect_A, timeout_connect_MX.
6764 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6765 to the empty sender.
6767 39. The daemon was not analysing the content of -oX till after it had closed
6768 stderr and disconnected from the controlling terminal. This meant that any
6769 syntax errors were only noted on the panic log, and the return code from
6770 the command was 0. By re-arranging the code a little, I've made the
6771 decoding happen first, so such errors now appear on stderr, and the return
6772 code is 1. However, the actual setting up of the sockets still happens in
6773 the disconnected process, so errors there are still only recorded on the
6776 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6777 connections (as happens on some IP stacks) was logged at start up time as
6778 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6779 it from "IPv6 and IPv4", which means that two separate sockets are being
6782 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6783 says whether AF_INET or AF_INET6 was passed as an argument.
6785 42. Exiwhat output was messed up when time zones were included in log
6788 43. Exiwhat now gives more information about the daemon's listening ports,
6789 and whether -tls-on-connect was used.
6791 44. The "port" option of the smtp transport is now expanded.
6793 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6794 silently ignored. Now an error message is written to the main and panic
6797 46. There's a new ACL modifier called "logwrite" which writes to a log file
6798 as soon as it is encountered.
6800 47. Added $local_user_uid and $local_user_gid at routing time.
6802 48. Exim crashed when trying to verify a sender address that was being
6805 49. Exim was recognizing only a space character after ".include". It now also
6806 recognizes a tab character.
6808 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6809 extracting the relevant information from the specification. The man page no
6810 longer contains scrambled data for the -d option, and I've added a section
6811 at the front about calling Exim under different names.
6813 51. Added "extra_headers" argument to the "mail" command in filter files.
6815 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6818 53. Installed eximstats 1.29.
6820 54. Added transport_filter_timeout as a generic transport option.
6822 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6823 Cc: header lines. This was required by RFC 822, but it not required by RFC
6826 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6827 incoming messages that did not have them. Now it does so only if the
6828 message originates locally, that is, if there is no associated remote host
6829 address. When Resent- header lines are present, this applies to the Resent-
6830 lines rather than the non-Resent- lines.
6832 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6833 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6835 58. Messages for configuration errors now include the name of the main
6836 configuration file - useful now that there may be more than one file in a
6837 list (.included file names were always shown).
6839 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6840 for those rare installations that do not start the daemon as root or run it
6841 setuid root. I've cut out the call to initgroups() if the daemon is not
6844 60. The Exim user and group can now be bound into the binary as text strings
6845 that are looked up at the start of Exim's processing.
6847 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6849 62. Added $mailstore_basename variable.
6851 63. Installed patch to sieve.c from Michael Haardt.
6853 64. When Exim failed to open the panic log after failing to open the main log,
6854 the original message it was trying to log was written to stderr and debug
6855 output, but if they were not available (the usual case in production), it
6856 was lost. Now it is written to syslog before the two lines that record the
6857 failures to open the logs.
6859 65. Users' Exim filters run in subprocesses under the user's uid. It is
6860 possible for a "deliver" command or an alias in a "personal" command to
6861 provoke an address rewrite. If logging of address rewriting is configured,
6862 this fails because the process is not running as root or exim. There may be
6863 a better way of dealing with this, but for the moment (because 4.30 needs
6864 to be released), I have disabled address rewrite logging when running a
6865 filter in a non-root, non-exim process.
6871 1. The buildconfig auxiliary program wasn't quoting the value set for
6872 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6873 not defined. This bug was masked in 4.22 by the effect that was fixed in
6876 2. Some messages that were rejected after a message id was allocated were
6877 shown as "incomplete" by exigrep. It no longer does this for messages that
6878 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6880 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6881 have allow_domain_literals set, the ID did not get logged in the <= line.
6882 Domain literals are now always recognized in Message-ID: header lines.
6884 4. The first argument for a ${extract expansion item is the key name or field
6885 number. Leading and trailing spaces in this item were not being ignored,
6886 causing some misleading effects.
6888 5. When deliver_drop_privilege was set, single queue runner processes started
6889 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6890 same command in the process it spins off) were not dropping privilege.
6892 6. When the daemon running as "exim" started a queue runner, it always
6893 re-executed Exim in the spun-off process. This is a waste of effort when
6894 deliver_drop_privilege is set. The new process now just calls the
6895 queue-runner function directly.
6901 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6904 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6905 ignored. Though the use of -oP was forcing the writing of a pid file, it
6906 was always written to the default place.
6908 3. If the message "no IP address found for host xxxx" is generated during
6909 incoming verification, it is now followed by identification of the incoming
6910 connection (so you can more easily find what provoked it).
6912 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6914 5. Added some features to "harden" Exim a bit more against certain attacks:
6916 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6917 be put in Local/Makefile. This is like the never_users runtime option,
6918 but it cannot be overridden. The default setting is "root".
6920 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6921 prefix string with which any file named in a -C command line option
6924 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6925 is retained for -C and -D only if the caller of Exim is root. Without
6926 it, the exim user may also use -C and -D and retain privilege.
6928 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6929 command line option is disabled.
6931 6. Macro names set by the -D option must start with an upper case letter, just
6932 like macro names defined in the configuration file.
6934 7. Added "dereference=" facility to LDAP.
6936 8. Two instances of the typo "uknown" in the source files are fixed.
6938 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6939 the Configure-Makefile script screwed up while processing it.
6941 10. Incorporated PCRE 4.4.
6943 11. The SMTP synchronization check was not operating right at the start of an
6944 SMTP session. For example, it could not catch a HELO sent before the client
6945 waited for the greeting. There is now a check for outstanding input at the
6946 point when the greeting is written. Because of the duplex, asynchronous
6947 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6948 way, but not yet received, when the check is performed.
6950 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6951 on TCP/IP sockets, because this apparently causes some broken clients to
6954 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6955 unchanged) from the Cygwin maintainer.
6957 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6958 was supported instead of testing for mbx. Effectively a typo.
6960 15. The spa authenticator server code was not checking that the input it
6961 received was valid base64.
6963 16. The debug output line for the "set" modifier in ACLs was not showing the
6964 name of the variable that was being set.
6966 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6968 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6969 lookup on its own. Something else was needed to trigger the lookup. For
6970 example, a match in host_lookup or the need for a host name in a host list.
6971 Now, if $sender_host_name is referenced and the host name has not yet been
6972 looked up, a lookup is performed. If the lookup fails, the variable remains
6973 empty, and $host_lookup_failed is set to "1".
6975 19. Added "eqi" as a case-independent comparison operator.
6977 20. The saslauthd authentication condition could segfault if neither service
6978 nor realm was specified.
6980 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6981 error message that was logged was misleading, and incoming SMTP
6982 connections were dropped. The message is now more accurate, and temporary
6983 errors are given to SMTP connections.
6985 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6986 (except RSET) with a 421 error, until QUIT is received. However, it was
6987 failing to send a response to QUIT.
6989 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6990 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6991 ACL is now run after the helo_try_verify_hosts code.
6993 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6994 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6995 case-independent, so other case variants are also recognized). Apparently
6996 some systems use these upper case variants.
6998 25. If more than two messages were waiting for the same host, and a transport
6999 filter was specified for the transport, Exim sent two messages over the
7000 same TCP/IP connection, and then failed with "socket operation on non-
7001 socket" when it tried to send the third.
7003 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7005 27. The extern definition of crypt16() in expand.c was not being excluded when
7006 the OS had its own crypt16() function.
7008 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7009 as a preferred synonym for return_size_limit, both as an option and as an
7012 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7014 30. Changed the default configuration ACL to relax the local part checking rule
7015 for addresses that are not in any local domains. For these addresses,
7016 slashes and pipe symbols are allowed within local parts, but the sequence
7017 /../ is explicitly forbidden.
7019 31. SPA server authentication was not clearing the challenge buffer before
7022 32. log_message in a "warn" ACL statement was writing to the reject log as
7023 well as to the main log, which contradicts the documentation and doesn't
7024 seem right (because no rejection is happening). So I have stopped it.
7026 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7027 However, I am unable to do any testing of this.
7029 34. Fixed an infelicity in the appendfile transport. When checking directories
7030 for a mailbox, to see if any needed to be created, it was accidentally
7031 using path names with one or more superfluous leading slashes; tracing
7032 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7034 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7035 contents are added to the log line that is written for every discarded
7036 recipient. (Previously a log_message setting was ignored.)
7038 36. The ${quote: operator now quotes the string if it is empty.
7040 37. The install script runs exim in order to find its version number. If for
7041 some reason other than non-existence or emptiness, which it checks, it
7042 could not run './exim', it was installing it with an empty version number,
7043 i.e. as "exim-". This error state is now caught, and the installation is
7046 38. An argument was missing from the function that creates an error message
7047 when Exim fails to connect to the socket for saslauthd authentication.
7048 This could cause Exim to crash, or give a corrupted message.
7050 39. Added isip, isip4, and isip6 to ${if conditions.
7052 40. The ACL variables $acl_xx are now saved with the message, and can be
7053 accessed later in routers, transports, and filters.
7055 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7056 strings in the file are not string-expanded.
7058 42. If a MAIL command specified a SIZE value that was too large to fit into an
7059 int variable, the check against message_size_limit failed. Such values are
7060 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7061 day this will have to be increased, but I don't think I want to be around
7062 when emails are that large.
7069 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7070 iconv() is not standard in FreeBSD.
7072 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7073 IPv6 enabled. The observed symptom was a segmentation fault on return from
7074 the function os_common_find_running_interfaces() in src/os.c.
7076 3. In the check_special_case() function in daemon.c I had used "errno" as an
7077 argument name, which causes warnings on some systems. This was basically a
7078 typo, since it was named "eno" in the comments!
7080 4. The code that waits for the clock to tick (at a resolution of some fraction
7081 of a second) so as to ensure message-id uniqueness was always waiting for
7082 at least one whole tick, when it could have waited for less. [This is
7083 almost certainly not relevant at current processor speeds, where it is
7084 unlikely to ever wait at all. But we try to future-proof.]
7086 5. The function that sleeps for a time interval that includes fractions of a
7087 second contained a race. It did not block SIGALRM between setting the
7088 timer, and suspending (a couple of lines later). If the interval was short
7089 and the sigsuspend() was delayed until after it had expired, the suspension
7090 never ended. On busy systems this could lead to processes getting stuck for
7093 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7094 process, before it forks any delivery processes. The open lookup caching
7095 mechanism meant that the open file or database connection was passed into
7096 the delivery process. The problem was that delivery processes always tidy
7097 up cached lookup data. This could cause a problem for the next delivery
7098 process started by the queue runner, because the external queue runner
7099 process does not know about the closure. So the next delivery process
7100 still has data in the lookup cache. In the case of a file lookup, there was
7101 no problem because closing a file descriptor in a subprocess doesn't affect
7102 the parent. However, if the lookup was caching a connection to a database,
7103 the connection was closed, and the second delivery process was likely to
7104 see errors such as "PGSQL: query failed: server closed the connection
7105 unexpectedly". The problem has been fixed by closing all cached lookups
7106 in a queue runner before running a delivery process.
7108 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7109 seem to have the "const" qualifier which it has on other OS. I've
7112 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7113 *of the same type* (client or server) with the same public name that an
7114 error should be diagnosed.
7116 9. When Exim looked up a host name for an IP address, but failed to find the
7117 original IP address when looking up the host name (a safety check), it
7118 output the message "<ip address> does not match any IP for NULL", which was
7119 confusing, to say the least. The bug was that the host name should have
7120 appeared instead of "NULL".
7122 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7123 user that is built into the binary, and the -C or -D options is used, root
7124 privilege is dropped before the configuration file is read. In addition,
7125 logging is switched to stderr instead of the normal log files. If the
7126 configuration then re-defines the Exim user, the unprivileged environment
7127 is probably not what is expected, so Exim logs a panic warning message (but
7130 However, if deliver_drop_privilege is set, the unprivileged state may well
7131 be exactly what is intended, so the warning has been cut out in that case,
7132 and Exim is allowed to try to write to its normal log files.
7138 1. smtp_return_error_details was not giving details for temporary sender
7139 or receiver verification errors.
7141 2. Diagnose a configuration error if two authenticators have the same public
7144 3. Exim used not to create the message log file for a message until the first
7145 delivery attempt. This could be confusing when incoming messages were held
7146 for policy or load reasons. The message log file is now created at the time
7147 the message is received, and an initial "Received" line is written to it.
7149 4. The automatically generated man page for command line options had a minor
7150 bug that caused no ill effects; however, a more serious problem was that
7151 the procedure for building the man page automatically didn't always
7152 operate. Consequently, release 4.20 contains an out-of-date version. This
7153 shouldn't happen again.
7155 5. When building Exim with embedded Perl support, the script that builds the
7156 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7157 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7159 6. The freeze_tell option was not being used for messages that were frozen on
7160 arrival, either by an ACL or by local_scan().
7162 7. Added the smtp_incomplete_transaction log selector.
7164 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7165 was accepting AUTH without a new EHLO.
7167 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7168 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7171 10. Logging of TCP/IP connections (when configured) now happens in the main
7172 daemon process instead of the child process, so that the TCP/IP connection
7173 count is more accurate (but it can never be perfect).
7175 11. The use of "drop" in a nested ACL was not being handled correctly in the
7176 outer ACL. Now, if condition failure induced by the nested "drop" causes
7177 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7178 or "require"), the connection is dropped.
7180 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7181 that yield "discard" can now be used with an "accept" or a "discard" verb,
7182 but an error is generated for any others (because I can't see a useful way
7183 to define what should happen).
7185 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7186 are now processed in the same way as lines in the Exim configuration file.
7187 In particular, continuation lines are supported.
7189 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7191 15. Added -ti meaning -t -i.
7193 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7194 domains, and warn by logging if others are found.
7196 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7197 returned from GIFCONF when Exim is trying to find the list of interfaces on
7198 a host. The code in os.c has been modified to copy each ifreq to an aligned
7199 structure in all cases.
7201 Also, in some cases, the returned ifreq's were being copied to a 'struct
7202 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7203 means the last couple of bytes of an IPv6 address could be chopped if the
7204 ifreq contained only a normal sockaddr (14 bytes storage).
7206 18. Named domain lists were not supported in the hosts_treat_as_local option.
7207 An entry such as +xxxx was not recognized, and was treated as a literal
7210 19. Ensure that header lines added by a DATA ACL are included in the reject log
7211 if the ACL subsequently rejects the message.
7213 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7214 MD5 (which is deprecated).
7216 21. When testing a filter file using -bf, Exim was writing a message when it
7217 took the sender from a "From " line in the message, but it was not doing so
7218 when it took $return_path from a Return-Path: header line. It now does.
7220 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7221 with a valid header line field name (a series of printing characters
7222 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7224 23. Changed "disc" in the source to "disk" to conform to the documentation and
7225 the book and for uniformity.
7227 24. Ignore Sendmail's -Ooption=value command line item.
7229 25. When execve() failed while trying to run a command in a pipe transport,
7230 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7231 could be confused with a return value of 69 from the command itself. This
7232 has been changed to 127, the value the shell returns if it is asked to run
7233 a non-existent command. The wording for the related log line suggests a
7234 non-existent command as the problem.
7236 26. If received_header_text expands to an empty string, do not add a Received:
7237 header line to the message. (Well, it adds a token one on the spool, but
7238 marks it "old" so that it doesn't get used or transmitted.)
7240 27. Installed eximstats 1.28 (addition of -nt option).
7242 28. There was no check for failure on the call to getsockname() in the daemon
7243 code. This can fail if there is a shortage of resources on the system, with
7244 ENOMEM, for example. A temporary error is now given on failure.
7246 29. Contrary to the C standard, it seems that in some environments, the
7247 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7248 program. Exim now does this explicitly; it affects the formatting of
7249 timestamps using strftime().
7251 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7252 complaints. I've now initialized all the variables, to avoid this.
7254 32. Header lines added by a system filter were not being "seen" during
7255 transport-time rewrites.
7257 33. The info_callback() function passed to OpenSSL is set up with type void
7258 (*)(SSL *, int, int), as described somewhere. However, when calling the
7259 function (actually a macro) that sets it up, the type void(*)() is
7260 expected. I've put in a cast to prevent warnings from picky compilers.
7262 34. If a DNS black list lookup found a CNAME record, but there were no A
7263 records associated with the domain it pointed at, Exim crashed.
7265 35. If a DNS black list lookup returned more than one A record, Exim ignored
7266 all but the first. It now scans all returned addresses if a particular IP
7267 value is being sought. In this situation, the contents of the
7268 $dnslist_value variable are a list of all the addresses, separated by a
7271 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7272 to accept a host name and all its aliases if the forward lookup for any of
7273 them yielded the IP address of the incoming connection. Now it accepts only
7274 those names whose forward lookup yields the correct IP address. Any other
7275 names are discarded. This closes a loophole whereby a rogue DNS
7276 administrator could create reverse DNS records to break through a
7277 wildcarded host restriction in an ACL.
7279 37. If a user filter or a system filter that ran in a subprocess used any of
7280 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7281 the wrong values were passed to the pipe command ($thisaddress had the
7282 value of $0, $0 had the value of $1, etc). This bug was introduced by
7283 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7285 38. Improved the line breaking for long SMTP error messages from ACLs.
7286 Previously, if there was no break point between 40 and 75 characters, Exim
7287 left the rest of the message alone. Two changes have been made: (a) I've
7288 reduced the minimum length to 35 characters; (b) if it can't find a break
7289 point between 35 and 75 characters, it looks ahead and uses the first one
7290 that it finds. This may give the occasional overlong line, but at least the
7291 remaining text gets split now.
7293 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7294 file descriptors might be low, and that setting 1000 would always raise it.
7295 It turns out that in some environments, the limit is already over 1000 and
7296 that lowering it causes trouble. So now Exim takes care not to decrease it.
7298 40. When delivering a message, the value of $return_path is set to $sender_
7299 address at the start of routing (routers may change the value). By an
7300 oversight, this default was not being set up when an address was tested by
7301 -bt or -bv, which affected the outcome if any router or filter referred to
7304 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7305 log only when "message" or "log_message" are set. However, if one of the
7306 conditions was an address verification, or a call to a nested ACL, the
7307 messages generated by the underlying test were being passed through. This
7308 no longer happens. The underlying message is available in $acl_verify_
7309 message for both "message" and "log_message" expansions, so it can be
7310 passed through if needed.
7312 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7313 new expansion $bh_ to give the encoded byte string without charset
7314 translation. Translation happens only if iconv() is available; HAVE_ICONV
7315 indicates this at build time. HEADERS_CHARSET gives the charset to
7316 translate to; headers_charset can change it in the configuration, and
7317 "headers charset" can change it in an individual filter file.
7319 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7320 that creates RFC 2047 encoded "words" labels them as that charset instead
7321 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7322 expansion operator; (ii) when Exim creates a From: line for a local
7323 message; (iii) when a header line is rewritten to include a "phrase" part.
7325 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7326 buggy, causing it to skip the first lines of messages whose message ID
7327 ended in 'D'. This would not have bitten before Exim release 4.14, because
7328 message IDs were unlikely to end in 'D' before then. The effect was to have
7329 incorrect size information for certain domains.
7331 45. #include "config.h" was missing at the start of the crypt16.c module. This
7332 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7335 46. If there was a timeout during a "random" callout check, Exim treated it as
7336 a failure of the random address, and carried on sending RSET and the real
7337 address. If the delay was just some slowness somewhere, the response to the
7338 original RCPT would be taken as a response to RSET and so on, causing
7339 mayhem of various kinds.
7341 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7342 when I implemented it. It didn't allow for the fact that some option values
7343 may legitimately be negative (e.g. size_addition), and it didn't even do
7344 the right test for positive values.
7346 48. Domain names in DNS records are case-independent. Exim always looks them up
7347 in lower case. Some resolvers return domain names in exactly the case they
7348 appear in the zone file, that is, they may contain uppercase letters. Not
7349 all resolvers do this - some return always lower case. Exim was treating a
7350 change of case by a resolver as a change of domain, similar to a widening
7351 of a domain abbreviation. This triggered its re-routing code and so it was
7352 trying to route what was effectively the same domain again. This normally
7353 caused routing to fail (because the router wouldn't handle the domain
7354 twice). Now Exim checks for this case specially, and just changes the
7355 casing of the domain that it ultimately uses when it transmits the message
7358 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7361 50. If a filter generated a file delivery with a non-absolute name (possible if
7362 no home directory exists for the router), the forbid_file option was not
7365 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7366 the existing equality matching.
7368 52. Exim was using ints instead of ino_t variables in some places where it was
7369 dealing with inode numbers.
7371 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7372 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7373 called TMPDIR, and if it finds it is different, it changes its value.
7375 54. The smtp_printf() function is now made available to local_scan() so
7376 additional output lines can be written before returning. There is also an
7377 smtp_fflush() function to enable the detection of a dropped connection.
7378 The variables smtp_input and smtp_batched_input are exported to
7381 55. Changed the default runtime configuration: the message "Unknown user"
7382 has been removed from the ACL, and instead placed on the localuser router,
7383 using the cannot_route_message feature. This means that any verification
7384 failures that generate their own messages won't get overridden. Similarly,
7385 the "Unrouteable address" message that was in the ACL for unverifiable
7386 relay addresses has also been removed.
7388 56. Added hosts_avoid_esmtp to the smtp transport.
7390 57. The exicyclog script was not checking for the esoteric option
7391 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7392 will work only if exicyclog is run under the appropriate euid.
7394 58. Following a discussion on the list, the rules by which Exim recognises line
7395 endings on incoming messages have been changed. The -dropcr and drop_cr
7396 options are now no-ops, retained only for backwards compatibility. The
7397 following line terminators are recognized: LF CRLF CR. However, special
7398 processing applies to CR:
7400 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7401 nor a local message in the state where . is a terminator.
7403 (ii) If a bare CR is encountered in a header line, an extra space is added
7404 after the line terminator so as not to end the header. The reasoning
7405 behind this is that bare CRs in header lines are most likely either
7406 to be mistakes, or people trying to play silly games.
7408 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7409 was being incorrectly given as 18 bytes larger than it should have been.
7410 This is a VOB (very old bug).
7412 60. This may never have affected anything current, but just in case it has:
7413 When the local host is found other than at the start of a list of hosts,
7414 the local host, those with the same MX, and any that follow, are discarded.
7415 When the list in question was part of a longer list of hosts, the following
7416 hosts (not currently being processed) were also being discarded. This no
7417 longer happens. I'm not sure if this situation could ever has previously
7420 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7423 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7424 header. This is something that is recommended in a new Internet Draft, and
7425 is something that is documented as being done by Sendmail. There are two
7426 possible values. For messages generated by the autoreply transport, Exim
7429 Auto-Submitted: auto-replied
7431 whereas for all other generated messages (e.g. bounces) it adds
7433 Auto-Submitted: auto-generated
7435 63. The "personal" condition in filters now includes a test for the
7436 Auto-Submitted: header. If it contains the string "auto-" the message it
7437 not considered personal.
7439 64. Added rcpt_include_affixes as a generic transport option.
7441 65. Added queue_only_override (default true).
7443 66. Added the syslog_duplication option.
7445 67. If what should have been the first header line of a message consisted of
7446 a space followed by a colon, Exim was mis-interpreting it as a header line.
7447 It isn't of course - it is syntactically invalid and should therefore be
7448 treated as the start of the message body. The misbehaviour could have
7449 caused a number of strange effects, including loss of data in subsequent
7450 header lines, and spool format errors.
7452 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7453 client host had authenticated. This control can now be exercised by an ACL
7454 for more flexibility.
7456 69. By default, callouts do not happen when testing with -bh. There is now a
7457 variant, -bhc, which does actually run the callout code, including
7458 consulting and updating the callout cache.
7460 70. Added support for saslauthd authentication, courtesy of Alexander
7463 71. If statvfs() failed on the spool or log directories while checking their
7464 size for availability, Exim confusingly gave the error "space shortage".
7465 Furthermore, in debugging mode it crashed with a floating point exception.
7466 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7467 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7468 serious problem, Exim now writes to the main and panic logs when this
7469 happens, with details of the failure. It then refuses to accept the
7470 incoming message, giving the message "spool directory problem" or "log
7471 directory problem" with a 421 code for SMTP messages.
7473 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7474 0, 1, and 2 exist, because some OS complain for execs without them (see
7475 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7476 descriptors. However, the code omitted to check that the open succeeded,
7477 causing mysterious errors if for some reason the permissions on /dev/null
7478 got screwed. Now Exim writes a message to the main and panic logs, and
7479 bombs out if it can't open /dev/null.
7481 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7482 interact so that it is all more flexible. It is supposed to remain
7483 backwards compatible. Also added extra_local_interfaces.
7485 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7486 to bomb out with an assertion failure - to the client this appears as a
7487 connection drop. This problem occurs in the part of the code that was taken
7488 from the Samba project. Fortunately, the assertion is in a very simple
7489 function, so I have fixed this by reproducing the function inline in the
7490 one place where it is called, and arranging for authentication to fail
7491 instead of killing the process with assert().
7493 75. The SPA client code was not working when the server requested OEM rather
7494 than Unicode encoding.
7496 76. Added code to make require_files with a specific uid setting more usable in
7497 the case where statting the file as root fails - usually a non-root-mounted
7498 NFS file system. When this happens and the failure is EACCES, Exim now
7499 forks a subprocess and does the per-uid checking as the relevant uid.
7501 77. Added process_log_path.
7503 78. If log_file_path was not explicitly set, a setting of check_log_space or
7504 check_log_inodes was ignored.
7506 79. If a space check for the spool or log partitions fails, the incident is now
7507 logged. Of course, in the latter case the data may get lost...
7509 80. Added the %p formatting code to string_format() so that it can be used to
7510 print addresses in debug_print(). Adjusted all the address printing in the
7511 debugging in store.c to use %p rather than %d.
7513 81. There was a concern that a line of code in smtp_in.c could overflow a
7514 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7515 initially expressed, the concern was not well-founded, because trailing
7516 spaces are removed early. However, if the trailing spaces were followed by
7517 a NULL, they did not get removed, so the overflow was possible. Two fixes
7520 (a) I re-wrote the offending code in a cleaner fashion.
7521 (b) If an incoming SMTP command contains a NULL character, it is rejected
7524 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7525 runs initgroups(), so that if the Exim user is in any additional groups,
7526 they will be used during message reception.
7532 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob