1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Avoid costly startup code when not strictly needed. This reduces time
10 for some exim process initialisations. It does mean that the logging
11 of TLS configuration problems is only done for the daemon startup.
13 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
15 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
16 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
19 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
20 DKIM signing is being done. Previously a transport_filter would always
21 disable CHUNKING, falling back to traditional DATA.
23 JH/05 Regard command-line receipients as tainted.
25 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
27 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
28 PAM library frees one of the arguments given to it, despite the
29 documentation. Therefore a plain malloc must be used.
31 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
32 on-stack buffers were used, resulting in a taint trap when DSN information
33 copied from a received message was written into the buffer.
35 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
36 the ordering of its ARC headers. This caused a crash.
38 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
39 a new record was being constructed with information from the peer, a trap
42 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
43 installation would get error messages from DMARC verify, when it hit the
44 nonexistent file indicated by the default. Distros wanting DMARC enabled
45 should both provide the file and set the option.
46 Also enforce no DMARC verification for command-line sourced messages.
48 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
49 could, depending on the platform, hang at the STARTTLS response.
51 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
52 message on a connection. Previously if one message had ARC headers and
53 the following one did not, a crash could result when adding an
54 Authentication-Results: header.
56 JH/14 On GNU/Hurd, retry EINTR returns from I/O on pipes, which seem to occur
63 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
64 side, to decode a TLS 1.3 packet capture.
66 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
67 Previously the default library behaviour applied, sending two, each in
70 JH/03 Debug output for ACL now gives the config file name and line number for
73 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
75 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
77 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
78 buffer overrun for (non-chunking) other transports.
80 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
81 TLS1.3, means that a server rejecting a client certificate is not visible
82 to the client until the first read of encrypted data (typically the
83 response to EHLO). Add detection for that case and treat it as a failed
84 TLS connection attempt, so that the normal retry-in-clear can work (if
87 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
88 and/or domain. Found and fixed by Jason Betts.
90 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
91 configuration). If a CNAME target was not a wellformed name pattern, a
94 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
95 the OS reports them interleaved with other addresses.
97 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
98 used both for input and for a verify callout, both encrypted, SMTP
99 responses being sent by the server could be lost. This resulted in
100 dropped connections and sometimes bounces generated by a peer sending
103 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
104 string. Previously it was possible to cause undefined behaviour in a
105 library routine (usually a crash). Found by "zerons".
107 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
110 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
111 API was removed, so update to use the newer ones.
113 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
114 any timeout set, is taking a long time. Previously we would hang on to a
115 rotated logfile "forever" if the input was arriving with long gaps
116 (a previous attempt to fix addressed lack, for a long time, of initial
119 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
120 shared (NFS) environment. The length of the tempfile name is now
121 4 + 16 ("hdr.$message_exim_id") which might break on file
122 systems which restrict the file name length to lower values.
125 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
126 shared (NFS) environment.
128 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
129 did for all versions <4.90). Notably -M, -m, --invert, -I may be
132 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
133 on some platforms for bit 31.
135 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
136 to changes apparently associated with TLS1.3 handling some of the APIs
137 previously used were either nonfunctional or inappropriate. Strings
138 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
139 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
140 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
141 This affects log line X= elements, the $tls_{in,out}_cipher variables,
142 and the use of specific cipher names in the encrypted= ACL condition.
144 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
146 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
147 verification result was not updated unless hosts_require_ocsp applied.
149 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
150 queue_list_requires_admin set to false, non-admin users were denied the
153 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
154 directory-of-certs mode. Previously they were advertised despite the
157 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
158 A single TCP connection by a client will now hold a TLS connection open
159 for multiple message deliveries, by default. Previoud the default was to
162 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
163 default. If built with the facility, DANE will be used. The facility
164 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
166 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
167 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
168 must be defined and you must still, unless you define DISABLE_TLS, manage
169 the the include-dir and library-file requirements that go with that
170 choice. Non-TLS builds are still supported.
172 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
175 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
176 default. If the platform supports and has the facility enabled, it will
177 be requested on all coneections.
179 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
180 controlled by the build-time option SUPPORT_PIPE_CONNECT.
182 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
184 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
185 success-DSN messages. Previously the From: header was always the default
186 one for these; the option was ignored.
188 JH/28 Fix the timeout on smtp response to apply to the whole response.
189 Previously it was reset for every read, so a teergrubing peer sending
190 single bytes within the time limit could extend the connection for a
191 long time. Credit to Qualsys Security Advisory Team for the discovery.
193 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
194 delivery address, which leaked information of the results of local
195 forwarding. Change to the original envelope recipient address, per
198 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
199 requested. Previously not bounce was generated and a log entry of
200 error ignored was made.
202 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
204 JH/32 Introduce a general tainting mechanism for values read from the input
205 channel, and values derived from them. Refuse to expand any tainted
206 values, to catch one form of exploit.
208 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
209 was unused and the unexpanded text used for the test. Found and
210 fixed by Ruben Jenster.
212 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
213 an attempt to use a TLS library read routine dereffed a nul pointer,
216 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
217 them in our smtp response.
219 JH/36 Have the general router option retry_use_local_part default to true when
220 any of the restrictive preconditions are set (to anything). Previously it
221 was only for check_local user. The change removes one item of manual
222 configuration which is required for proper retries when a remote router
223 handles a subset of addresses for a domain.
225 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
226 link count into consideration.
228 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
229 caused the extension of big_buffer, the following lines were ignored.
231 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
232 accordance with RFC 2308. Previously there was no expiry, so a longlived
233 receive process (eg. due to ACL delays) versus a short SOA value could
236 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
238 JH/39 Promote DMARC support to mainline.
240 JH/40 Bug 2452: Add a References: header to DSNs.
242 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
243 parameters. The relevant library call is documented as "Deprecated: This
244 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
245 3.6.0, DH parameters are negotiated following RFC7919."
247 HS/06 Change the default of dnssec_request_domains to "*"
249 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
250 carried on and emitted a BDAT command, even when PIPELINING was not
253 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
254 buffer was used for the filename, resulting in a trap when tainted
255 arguments (eg. $domain) were used.
257 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
258 recommended to avoid a possible server-load attack. The feature can be
259 re-enabled via the openssl_options main cofiguration option.
261 JH/45 local_scan API: documented the current smtp_printf() call. This changed
262 for version 4.90 - adding a "more data" boolean to the arguments.
263 Bumped the ABI version number also, this having been missed previously;
264 release versions 4.90 to 4.92.3 inclusive were effectively broken in
265 respect of usage of smtp_printf() by either local_scan code or libraries
266 accessed via the ${dlfunc } expansion item. Both will need coding
267 adjustment for any calls to smtp_printf() to match the new function
268 signature; a FALSE value for the new argument is always safe.
270 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
271 the file-offset (which the Linux syscall does, and exim expects); this
272 resulted in an indefinite loop.
274 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
275 to do ARC verification. The Authentication-Results: header line added
276 by the configuration then had no ARC item.
282 JH/01 Remove code calling the customisable local_scan function, unless a new
283 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
285 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
286 non-signal-safe functions being used.
288 JH/03 Bug 2269: When presented with a received message having a stupidly large
289 number of DKIM-Signature headers, disable DKIM verification to avoid
290 a resource-consumption attack. The limit is set at twenty.
292 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
293 report of oldest_pass in ${authres } in consequence, and separate out
294 some descriptions of reasons for verification fail.
296 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
297 files in the spool were present and unlocked. A queue-runner could spot
298 them, resulting in a duplicate delivery. Fix that by doing the unlock
299 after the unlink. Investigation by Tim Stewart. Take the opportunity to
300 add more error-checking on spoolfile handling while that code is being
303 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
304 No known attacks, no CVE, this is defensive hardening.
306 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
307 a queue-runner could start a delivery while other operations were ongoing.
308 Cutthrough delivery was a common victim, resulting in duplicate delivery.
309 Found and investigated by Tim Stewart. Fix by using the open message data
310 file handle rather than opening another, and not locally closing it (which
311 releases a lock) for that case, while creating the temporary .eml format
312 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
314 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
315 $sender_verify_failure/$recipient_verify_failure to "random".
317 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
320 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
321 Previously this would segfault.
323 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
326 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
327 like zero, since the resolver should be doing this for us, But we need one
328 as a CNAME but no MX presence gets the CNAME returned; we need to check
329 that doesn't point to an MX to declare it "no MX returned" rather than
330 "error, loop". A new main option is added so the older capability of
331 following some limited number of chain links is maintained.
333 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
335 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
336 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
337 now-deprecated earlier definitions used only specified the range up to TLS
338 1.2 (in the older-version library docs).
340 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
342 JH/15 Rework TLS client-side context management. Stop using a global, and
343 explicitly pass a context around. This enables future use of TLS for
344 connections to service-daemons (eg. malware scanning) while a client smtp
345 connection is using TLS; with cutthrough connections this is quite likely.
347 JH/16 Fix ARC verification to do AS checks in reverse order.
349 JH/17 Support a "tls" option on the ${readsocket } expansion item.
351 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
352 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
353 Previously the "utf8" would be re-prepended for every additional message.
355 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
356 Previously thery were accepted, resulting in issues when attempting to
357 forward messages to a non-supporting MTA.
359 PP/02 Let -n work with printing macros too, not just options.
361 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
362 one parent address was copied, and bogus data was used at delivery-logging
363 time. Either a crash (after delivery) or bogus log data could result.
364 Discovery and analysis by Tim Stewart.
366 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
367 Previously if the string ended mid-character, we did not insert the
368 promised '?' replacement.
370 PP/04 Documentation: current string operators work on bytes, not codepoints.
372 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
373 should pack well giving a smaller memory footprint so better caching and
374 therefore performance. Group the declarations where this can't be done so
375 that the byte-sized flag variables are not interspersed among pointer
376 variables, giving a better chance of good packing by the compiler.
378 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
379 non-null, to avoid issues with sites running BATV. Previously reports were
380 sent with an empty envelope sender so looked like bounces.
382 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
383 The ignore_error flag wasn't being returned from the filter subprocess so
384 was not set for later routers. Investigation and fix by Matthias Kurz.
386 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
387 and a msg:complete for the whole, when a message is manually removed using
388 -Mrm. Developement by Matthias Kurz, hacked on by JH.
390 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
391 a "Gnu special" function, asprintf() in the DB utility binary builds; I
392 hope that is portable enough.
394 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
395 requiring a known-CA anchor certificate; make it now rely entirely on the
396 TLSA as an anchor. Checking the name on the leaf cert against the name
397 on the A-record for the host is still done for TA (but not for EE mode).
399 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
400 included in delivery lines for non-proxied connections, when compiled with
401 SUPPORT_SOCKS and running with proxy logging enabled.
403 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
404 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
405 move the existing event to fire before the normal logging of message
406 failure so that custom logging is bracketed by normal logging.
408 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
409 msg:fail:internal event. Developement by Matthias Kurz.
411 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
412 far too small for todays use of crypto signatures stored there. Go all
413 the way to the max DNS message size of 64kB, even though this might be
414 overmuch for IOT constrained device use.
416 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
417 copy a string over itself. The library routine is documented as not
418 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
420 JH/32 For main options check_spool_space and check_inode_space, where the
421 platform supports 64b integers, support more than the previous 2^31 kB
422 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
423 the previous G, M, k.
425 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
426 $authenticated_fail_id variable on authentication failure. Previously
429 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
430 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
431 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
432 GNUTLS_SEC_PARAM_MEDIUM.
434 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
435 side. Previously we would continue as if no SNI had been received.
437 JH/36 Harden the handling of string-lists. When a list consisted of a sole
438 "<" character, which should be a list-separator specification, we walked
439 off past the nul-terimation.
441 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
442 causes) even when the retry time is not yet met. Previously they were
443 not, meaning that when (say) an account was over-quota and temp-rejecting,
444 and multiple senders' messages were queued, only one sender would get
445 notified on each configured delay_warning cycle.
447 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
449 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
450 cipher-suites, an error can be left on the stack even for a succeeding
451 accept; this results in impossible error messages when a later operation
454 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
455 return error codes indicating retry. Under TLS1.3 this becomes required.
457 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
458 it only wrote the new authenticators, resulting in a lack of tracking of
459 peer changes of ESMTP extensions until the next cache flush.
461 JH/41 Fix the loop reading a message header line to check for integer overflow,
462 and more-often against header_maxsize. Previously a crafted message could
463 induce a crash of the recive process; now the message is cleanly rejected.
465 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
466 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
472 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
473 When redis_servers is set to a list of > 1 element, and the Redis servers
474 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
475 case of MOVED into a DEFER case instead, thus moving the query onto the
476 next server in the list. For a cluster of N elements, all N servers must
477 be defined in redis_servers.
479 GF/02 Catch and remove uninitialized value warning in exiqsumm
480 Check for existence of @ARGV before looking at $ARGV[0]
482 JH/01 Replace the store_release() internal interface with store_newblock(),
483 which internalises the check required to safely use the old one, plus
484 the allocate and data copy operations duplicated in both (!) of the
485 extant use locations.
487 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
488 modifier. This matches the restriction on the commandline.
490 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
491 Previously only the last row was returned.
493 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
494 we assumed that tags in the header were well-formed, and parsed the
495 element content after inspecting only the first char of the tag.
496 Assumptions at that stage could crash the receive process on malformed
499 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
500 While running the DKIM ACL we operate on the Permanent memory pool so that
501 variables created with "set" persist to the DATA ACL. Also (at any time)
502 DNS lookups that fail create cache records using the Permanent pool. But
503 expansions release any allocations made on the current pool - so a dnsdb
504 lookup expansion done in the DKIM ACL releases the memory used for the
505 DNS negative-cache, and bad things result. Solution is to switch to the
506 Main pool for expansions.
507 While we're in that code, add checks on the DNS cache during store_reset,
508 active in the testsuite.
509 Problem spotted, and debugging aided, by Wolfgang Breyha.
511 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
512 When none of the hosts presented to a transport match an already-open
513 connection, close it and proceed with the list. Previously we would
514 queue the message. Spotted by Lena with Yahoo, probably involving
517 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
518 Previously a spurious "250 OK id=" response was appended to the proper
521 JH/08 The "support for" informational output now, which built with Content
522 Scanning support, has a line for the malware scanner interfaces compiled
523 in. Interface can be individually included or not at build time.
525 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
526 by the template makefile "src/EDITME". The "STREAM" support for an older
527 ClamAV interface method is removed.
529 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
530 rows affected is given instead).
532 JH/11 The runtime Berkeley DB library version is now additionally output by
533 "exim -d -bV". Previously only the compile-time version was shown.
535 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
536 SMTP connection. Previously, when one had more receipients than the
537 first, an abortive onward connection was made. Move to full support for
538 multiple onward connections in sequence, handling cutthrough connection
539 for all multi-message initiating connections.
541 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
542 routers. Previously, a multi-recipient message would fail to match the
543 onward-connection opened for the first recipient, and cause its closure.
545 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
546 a timeout on read on a GnuTLS initiating connection, resulting in the
547 initiating connection being dropped. This mattered most when the callout
548 was marked defer_ok. Fix to keep the two timeout-detection methods
551 JH/15 Relax results from ACL control request to enable cutthrough, in
552 unsupported situations, from error to silently (except under debug)
553 ignoring. This covers use with PRDR, frozen messages, queue-only and
556 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
558 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
559 metadata, resulting in a crash in free().
561 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
562 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
563 Broken also in d185889f4, with init system revamp.
565 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
566 Previously we abruptly closed the connection after reading a malware-
567 found indication; now we go on to read the "scan ok" response line,
570 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
571 ACL. Previously, a crash would result.
573 JH/19 Speed up macro lookups during configuration file read, by skipping non-
574 macro text after a replacement (previously it was only once per line) and
575 by skipping builtin macros when searching for an uppercase lead character.
577 JH/20 DANE support moved from Experimental to mainline. The Makefile control
578 for the build is renamed.
580 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
581 was allocated for every new TLS startup, meaning one per message. Fix
582 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
584 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
585 reported the original. Fix to report (as far as possible) the ACL
586 result replacing the original.
588 JH/23 Fix memory leak during multi-message connections using STARTTLS under
589 OpenSSL. Certificate information is loaded for every new TLS startup,
590 and the resources needed to be freed.
592 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
594 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
597 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
598 DATA response info to the (existing) per-recipient response info for
599 the "C=" log element. It can have useful tracking info from the
600 destination system. Patch from Simon Arlott.
602 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
603 length value. Previously this would segfault.
605 HS/02 Support Avast multiline protoocol, this allows passing flags to
606 newer versions of the scanner.
608 JH/28 Ensure that variables possibly set during message acceptance are marked
609 dead before release of memory in the daemon loop. This stops complaints
610 about them when the debug_store option is enabled. Discovered specifically
611 for sender_rate_period, but applies to a whole set of variables.
612 Do the same for the queue-runner and queue-list loops, for variables set
613 from spool message files. Do the same for the SMTP per-message loop, for
614 certain variables indirectly set in ACL operations.
616 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
617 as a multi-recipient message from a mailinglist manager). The coding had
618 an arbitrary cutoff number of characters while checking for more input;
619 enforced by writing a NUL into the buffer. This corrupted long / fast
620 input. The problem was exposed more widely when more pipelineing of SMTP
621 responses was introduced, and one Exim system was feeding another.
622 The symptom is log complaints of SMTP syntax error (NUL chars) on the
623 receiving system, and refused recipients seen by the sending system
624 (propating to people being dropped from mailing lists).
625 Discovered and pinpointed by David Carter.
627 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
628 replaced by the ${authresults } expansion.
630 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
632 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
633 allows proper process termination in container environments.
635 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
636 Previously the "final dot" had a newline after it; ensure it is CR,LF.
638 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
639 and "err_perm", deprecated since 4.83 when the RFC-defined words
640 "temperror" and "permerror" were introduced.
642 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
643 transport-filters or DKIM-signing. The restriction was lost in the
644 consolidation of verify-callout and delivery SMTP handling.
645 Extend the restriction to also cover ARC-signing.
647 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
648 in defer=pass mode supply a 450 to the initiator. Previously the message
651 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
652 tls_require_ciphers is used as before.
654 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
655 "pass_unscanned". Only tmpfails from the scanner are written to
656 the paniclog, as they may require admin intervention (permission
657 denied, license issues). Other scanner errors (like decompression
658 bombs) do not cause a paniclog entry.
660 JH/36 Fix reinitialisation of DKIM logging variable between messages.
661 Previously it was possible to log spurious information in receive log
664 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
665 triggered odd behaviour from Outlook Express clients.
667 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
670 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
671 since the IETF WG has not yet settled on that versus the original
672 "bare" representation.
674 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
675 Previously the millisecond value corrupted the output.
676 Fix also for syslog_pid=no and log_selector +pid, for which the pid
677 corrupted the output.
683 JH/01 Rework error string handling in TLS interface so that the caller in
684 more cases is responsible for logging. This permits library-sourced
685 string to be attached to addresses during delivery, and collapses
686 pairs of long lines into single ones.
688 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
689 during configuration. Wildcards are allowed and expanded.
691 JH/02 Rework error string handling in DKIM to pass more info back to callers.
692 This permits better logging.
694 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
695 do not close it down and have the child transport start it up again on
696 the passed-on TCP connection. Instead, proxy the child (and any
697 subsequent ones) for TLS via a unix-domain socket channel. Logging is
698 affected: the continued delivery log lines do not have any DNSSEC, TLS
699 Certificate or OCSP information. TLS cipher information is still logged.
701 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
702 identical IP addresses on different listening ports. Will also affect
705 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
706 add noisy ifdef guards to special-case this sillyness.
707 Patch from Bernd Kuhls.
709 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
710 than 255 are no longer allowed.
712 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
713 Disable the session-cache too, which might reduce our load. Since we
714 currrectly use a new context for every connection, both as server and
715 client, there is no benefit for these.
716 GnuTLS appears to not support tickets server-side by default (we don't
717 call gnutls_session_ticket_enable_server()) but client side is enabled
718 by default on recent versions (3.1.3 +) unless the PFS priority string
721 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
722 <https://reproducible-builds.org/specs/source-date-epoch/>.
724 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
725 the check for any unsuccessful recipients did not notice the limit, and
726 erroneously found still-pending ones.
728 JH/08 Pipeline CHUNKING command and data together, on kernels that support
729 MSG_MORE. Only in-clear (not on TLS connections).
731 JH/09 Avoid using a temporary file during transport using dkim. Unless a
732 transport-filter is involved we can buffer the headers in memory for
733 creating the signature, and read the spool data file once for the
734 signature and again for transmission.
736 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
737 4.77 as the kernel support then wasn't solid, having issues in 64bit
738 mode. Now, it's been long enough. Add support for FreeBSD also.
740 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
741 case where the routing stage had gathered several addresses to send to
742 a host before calling the transport for the first, we previously failed
743 to close down TLS in the old transport process before passing the TCP
744 connection to the new process. The new one sent a STARTTLS command
745 which naturally failed, giving a failed delivery and bloating the retry
746 database. Investigation and fix prototype from Wolfgang Breyha.
748 JH/12 Fix check on SMTP command input synchronisation. Previously there were
749 false-negatives in the check that the sender had not preempted a response
750 or prompt from Exim (running as a server), due to that code's lack of
751 awareness of the SMTP input buffering.
753 PP/04 Add commandline_checks_require_admin option.
754 Exim drops privileges sanely, various checks such as -be aren't a
755 security problem, as long as you trust local users with access to their
756 own account. When invoked by services which pass untrusted data to
757 Exim, this might be an issue. Set this option in main configuration
758 AND make fixes to the calling application, such as using `--` to stop
761 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
762 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
763 responses to those, into a single TLS record each way (this usually means
764 a single packet). As a side issue, smtp_enforce_sync now works on TLS
767 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
768 affects you only if you're dancing at the edge of the param size limits.
769 If you are, and this message makes sense to you, then: raise the
770 configured limit or use OpenSSL 1.1. Nothing we can do for older
773 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
774 cmdline element to get the documented default one. Previously it was
777 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
778 are unsuable for non-message-specific reasons - eg. connection timeout,
779 banner-time rejection.
781 JH/16 Fix logging of delivery remote port, when specified by router, under
784 PP/06 Repair manualroute's ability to take options in any order, even if one
785 is the name of a transport.
788 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
790 JH/17 Change the list-building routines interface to use the expanding-string
791 triplet model, for better allocation and copying behaviour.
793 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
794 Previously it was constructed the first time a possibly-matching string
795 was met in the configuration file input during startup; now it is done
798 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
799 compatible one, to avoid the (poorly documented) possibility of a config
800 file in the working directory redirecting the DB files, possibly correpting
801 some existing file. CVE-2017-10140 assigned for BDB.
803 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
804 cache-hot. Previously, although the result was properly cached, the
805 initial verify call returned a defer.
807 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
808 the main verify for receipient in uncached-mode.
810 JH/22 Retire historical build files to an "unsupported" subdir. These are
811 defined as "ones for which we have no current evidence of testing".
813 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
814 if present. Previously it was ignored.
816 JH/24 Start using specified-initialisers in C structure init coding. This is
817 a C99 feature (it's 2017, so now considered safe).
819 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
820 if was a fixed-sized field and bitmask ops via macros; it is now more
823 PP/07 GitHub PR 56: Apply MariaDB build fix.
824 Patch provided by Jaroslav Škarvada.
826 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
827 during Coverity cleanups [4.87 JH/47]
828 Diagnosis and fix provided by Michael Fischer v. Mollard.
830 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
831 the right size to place the terminating semicolon on its own folded
832 line, the header hash was calculated to an incorrect value thanks to
833 the (relaxed) space the fold became.
835 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
836 and confused the parent.
838 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
839 which could crash as a result. This could lead to undeliverable messages.
841 JH/28 Logging: "next input sent too soon" now shows where input was truncated
844 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
845 matters on fast-turnover and PID-randomising systems, which were getting
846 out-of-order delivery.
848 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
849 a possibly-overlapping copy. The symptom was that "Remote host closed
850 connection in response to HELO" was logged instead of the actual 4xx
853 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
854 Previously only that bufferd was discarded, resulting in SYMTP command
857 JH/32 DKIM: when a message has multiple signatures matching an identity given
858 in dkim_verify_signers, run the dkim acl once for each. Previously only
859 one run was done. Bug 2189.
861 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
862 "panic the current process" to "deliberately defer". The panic log is
863 still written with the problem list name; the mail and reject logs now
864 get a temp-reject line for the message that was being handled, saying
865 something like "domains check lookup or other defer". The SMTP 451
866 message is still "Temporary local problem".
868 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
869 A crafted sequence of BDAT commands could result in in-use memory beeing
870 freed. CVE-2017-16943.
872 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
873 from SMTP input. Previously it was always done; now only done for DATA
874 and not BDAT commands. CVE-2017-16944.
876 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
877 to the message (such as an overlong header line). Previously this was
878 not done and we did not exit BDAT mode. Followon from the previous item
879 though a different problem.
885 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
886 than -2003 did; needs libidn2 in addition to libidn.
888 JH/02 The path option on a pipe transport is now expanded before use.
890 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
891 Patch provided by "Björn", documentation fix added too.
893 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
894 missing a wire-to-host endian conversion.
896 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
897 close after a BDAT command line could be taken as a following command,
898 giving a synch failure. Fix by only checking for synch immediately
899 before acknowledging the chunk.
901 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
902 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
903 macro. Patches provided by Josh Soref.
905 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
906 Previously we did not; the RFC seems ambiguous and VRFY is not listed
907 by IANA as a service extension. However, John Klensin suggests that we
910 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
911 the dkim code may be unix-mode line endings rather than smtp wire-format
912 CRLF, so prepend a CR to any bare LF.
914 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
915 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
917 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
918 the first were themselves being wrongly included in the feed into dkim
919 processing; with most chunk sizes in use this resulted in an incorrect
920 body hash calculated value.
922 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
923 DKIM signature block, for verification. Although advised against by
924 standards it is specifically not ruled illegal.
926 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
928 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
929 missing a body hash (the bh= tag).
931 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
932 It seems that HAProxy sends the Proxy Protocol information in clear and
933 only then does a TLS startup, so do the same.
935 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
936 TCP connections (such as for Spamd) unless the daemon successfully set
937 Fast Open mode on its listening sockets. This fixes breakage seen on
938 too-old kernels or those not configured for Fast Open, at the cost of
939 requiring both directions being enabled for TFO, and TFO never being used
940 by non-daemon-related Exim processes.
942 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
943 endings, at least on the first header line. Try to canonify any that get
944 past that check, despite the cost.
946 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
947 now limited to an arbitrary five deep, while parsing addresses with the
948 strip_excess_angle_brackets option enabled.
950 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
951 instead leave the unprompted TLS handshake in socket buffer for the
952 TLS library to consume.
954 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
956 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
958 JH/16 Drop variables when they go out of scope. Memory management drops a whole
959 region in one operation, for speed, and this leaves assigned pointers
960 dangling. Add checks run only under the testsuite which checks all
961 variables at a store-reset and panics on a dangling pointer; add code
962 explicitly nulling out all the variables discovered. Fixes one known
963 bug: a transport crash, where a dangling pointer for $sending_ip_address
964 originally assigned in a verify callout, is re-used.
966 PP/06 Drop '.' from @INC in various Perl scripts.
968 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
970 PP/08 Reduce a number of compilation warnings under clang; building with
971 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
972 should be warning-free.
974 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
976 HS/01 Fix portability problems introduced by PP/08 for platforms where
977 realloc(NULL) is not equivalent to malloc() [SunOS et al].
979 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
980 chunk. This allows us to accept broken chunked messages. We need a more
981 general solution here.
983 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
984 already-broken messages in the queue.
986 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
988 JH/19 Fix reference counting bug in routing-generated-address tracking.
994 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
995 supports it and a size is available (ie. the sending peer gave us one).
997 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
998 years of being deprecated). The replacements are the ACLs
999 acl_smtp_mime and acl_not_smtp_mime.
1001 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1002 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1003 or even an in-clear connection were permitted. Now, if the host lookup
1004 was dnssec and dane was requested then the host is only used if the
1005 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1006 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1007 if one fails this test.
1008 This means that a poorly-configured remote DNS will make it incommunicado;
1009 but it protects against a DNS-interception attack on it.
1011 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1012 non-noisy when a race steals the message being considered.
1014 JH/05 If main configuration option tls_certificate is unset, generate a
1015 self-signed certificate for inbound TLS connections.
1017 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1018 in rewrites and routers.
1020 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1021 and logged a warning sing 4.83; now they are a configuration file error.
1023 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1024 (lacking @domain). Apply the same qualification processing as RCPT.
1026 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1028 JH/10 Support ${sha256:} applied to a string (as well as the previous
1031 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1032 a cutthrough deliver is pending, as we always want to make a connection.
1033 This also avoids re-routing the message when later placing the cutthrough
1034 connection after a verify cache hit.
1035 Do not update it with the verify result either.
1037 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1038 when routing results in more than one destination address.
1040 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1041 signing (which inhibits the cutthrough capability). Previously only
1042 the presence of an option was tested; now an expansion evaluating as
1043 empty is permissible (obviously it should depend only on data available
1044 when the cutthrough connection is made).
1046 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1047 the relevant preceding SMTP command did not note the pipelining mode.
1049 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1050 Previously they were not counted.
1052 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1053 as one having no matching records. Previously we deferred the message
1054 that needed the lookup.
1056 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1057 distinguished as "(=".
1059 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1060 for missing MX records. Previously it only worked for missing A records.
1062 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1064 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1065 after the data-go-ahead and data-ack. Patch from Jason Betts.
1067 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1068 even for a "none" policy. Patch from Tony Meyer.
1070 JH/22 Fix continued use of a connection for further deliveries. If a port was
1071 specified by a router, it must also match for the delivery to be
1074 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1075 When one of the recipients of a message was unsuitable for the connection
1076 (has no matching addresses), we lost track of needing to mark it
1077 deferred. As a result mail would be lost.
1079 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1081 JH/25 Decoding ACL controls is now done using a binary search; the source code
1082 takes up less space and should be simpler to maintain. Merge the ACL
1083 condition decode tables also, with similar effect.
1085 JH/26 Fix problem with one_time used on a redirect router which returned the
1086 parent address unchanged. A retry would see the parent address marked as
1087 delivered, so not attempt the (identical) child. As a result mail would
1090 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1091 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1092 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1095 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1096 Main config options check_{log,spool}_{inodes,space} are now
1097 100 inodes, 10MB unless set otherwise in the configuration.
1099 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1100 Previously it only applied to the main-section connection policy
1103 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1105 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1106 by me. Added RFC7919 DH primes as an alternative.
1108 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1109 are not in the system include path.
1111 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1112 GnuTLS, when a session startup failed (eg because the client disconnected)
1113 Exim did stdio operations after fclose. This was exposed by a recent
1114 change which nulled out the file handle after the fclose.
1116 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1117 signed directly by the cert-signing cert, rather than an intermediate
1118 OCSP-signing cert. This is the model used by LetsEncrypt.
1120 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1122 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1123 an incoming connection.
1125 HS/02 Bug 1802: Do not half-close the connection after sending a request
1128 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1129 fallback to "prime256v1".
1131 JH/34 SECURITY: Use proper copy of DATA command in error message.
1132 Could leak key material. Remotely exploitable. CVE-2016-9963.
1138 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1139 and 3.4.4 - once the server is enabled to respond to an OCSP request
1140 it does even when not requested, resulting in a stapling non-aware
1141 client dropping the TLS connection.
1143 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1144 support variable-length bit vectors. No functional change.
1146 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1147 The I= interface field on outgoing lines is now after the H= remote
1148 host field, same as incoming lines. There is a separate
1149 outgoing_interface log selector which allows you to disable the
1152 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1153 If not running log_selector +smtp_connection the mainlog would be held
1154 open indefinitely after a "too many connections" event, including to a
1155 deleted file after a log rotate. Leave the per net connection logging
1156 leaving it open for efficiency as that will be quickly detected by the
1157 check on the next write.
1159 HS/01 Bug 1671: Fix post transport crash.
1160 Processing the wait-<transport> messages could crash the delivery
1161 process if the message IDs didn't exist for some reason. When
1162 using 'split_spool_directory=yes' the construction of the spool
1163 file name failed already, exposing the same netto behaviour.
1165 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1166 mime_regex ACL conditions.
1168 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1169 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1170 to HELO, local diagnostic string.
1172 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1173 log line to debug. Even when configured with a tls authenticator many
1174 client connections are expected to not authenticate in this way, so
1175 an authenticate fail is not an error.
1177 HS/02 Add the Exim version string to the process info. This way exiwhat
1178 gives some more detail about the running daemon.
1180 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1181 matter for fast-change records such as DNSBLs.
1183 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1184 retry record, even if constant. There may be multiple transports with
1185 different interface settings and the retry behaviour needs to be kept
1188 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1190 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1192 JH/10 Bug 840: fix log_defer_output option of pipe transport
1194 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1195 hosts_randomize. This matters a lot when combined with mua_wrapper.
1197 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1198 ${quote_pgsql:<string>} operator.
1200 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1202 JH/14 Change header file name for freeradius-client. Relevant if compiling
1203 with Radius support; from the Gentoo tree and checked under Fedora.
1205 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1207 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1208 option transport_filter, meaning no filtering.
1210 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1212 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1213 defaults to "*" (all hosts). The variable is now available when not built
1214 with TLS, default unset, mainly to enable keeping the testsuite sane.
1215 If a server certificate is not supplied (via tls_certificate) an error is
1216 logged, and clients will find TLS connections fail on startup. Presumably
1217 they will retry in-clear.
1218 Packagers of Exim are strongly encouraged to create a server certificate
1219 at installation time.
1221 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1222 with the $config_file variable.
1224 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1225 in transport context, after the attempt, and per-recipient. The latter type
1226 is per host attempted. The event data is the error message, and the errno
1227 information encodes the lookup type (A vs. MX) used for the (first) host,
1228 and the trailing two digits of the smtp 4xx response.
1230 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1231 to write to mainlog (or rejectlog, paniclog) in the window between file
1232 creation and permissions/ownership being changed. Particularly affects
1233 installations where exicyclog is run as root, rather than exim user;
1234 result is that the running daemon panics and dies.
1236 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1238 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1239 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1240 "pri" and "weight". Note that the previous implicit priority given by the
1241 list order is no longer honoured.
1243 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1244 for DKIM processing.
1246 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1247 by defining SUPPORT_SOCKS.
1249 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1250 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1251 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1252 variables are renamed to proxy_{local,external}_{address,port}.
1254 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1255 for a build by defining SUPPORT_I18N
1257 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1258 of the query string, and make ${quote_redis:} do that quoting.
1260 JH/29 Move Events support from Experimental to mainline, enabled by default
1261 and removable for a build by defining DISABLE_EVENT.
1263 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1265 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1266 cached by the daemon.
1268 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1269 by defining LOOKUP_REDIS. The libhiredis library is required.
1271 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1272 keys are given for lookup.
1274 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1275 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1276 only supported when built with TLS support. The PolarSSL SHA routines
1277 are still used when the TLS library is too old for convenient support.
1279 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1280 openssl_options), for security. OpenSSL forces this from version 1.1.0
1281 server-side so match that on older versions.
1283 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1284 allocation for $value could be released as the expansion processing
1285 concluded, but leaving the global pointer active for it.
1287 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1288 and to use the domains and local_parts ACL conditions.
1290 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1291 incorrectly not doubled on cutthrough transmission, hence seen as a
1292 body-termination at the receiving system - resulting in truncated mails.
1293 Commonly the sender saw a TCP-level error, and retransmitted the message
1294 via the normal store-and-forward channel. This could result in duplicates
1295 received - but deduplicating mailstores were liable to retain only the
1296 initial truncated version.
1298 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1300 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1302 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1303 we're in there, support oversigning also; bug 1309.
1305 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1307 HS/04 Add support for keep_environment and add_environment options.
1309 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1310 either intentional arithmetic overflow during PRNG, or testing config-
1313 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1314 delivery resulted in actual delivery. Cancel cutthrough before DATA
1317 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1318 rejects a recipient: pass the reject to the originator.
1320 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1321 Many were false-positives and ignorable, but it's worth fixing the
1324 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1325 for the new environment-manipulation done at startup. Move the routines
1326 from being local to tls.c to being global via the os.c file.
1328 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1329 an extract embedded as result-arg for a map, the first arg for extract
1330 is unavailable so we cannot tell if this is a numbered or keyed
1331 extraction. Accept either.
1337 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1340 JH/02 The smtp transport option "multi_domain" is now expanded.
1342 JH/03 The smtp transport now requests PRDR by default, if the server offers
1345 JH/04 Certificate name checking on server certificates, when exim is a client,
1346 is now done by default. The transport option tls_verify_cert_hostnames
1347 can be used to disable this per-host. The build option
1348 EXPERIMENTAL_CERTNAMES is withdrawn.
1350 JH/05 The value of the tls_verify_certificates smtp transport and main options
1351 default to the word "system" to access the system default CA bundle.
1352 For GnuTLS, only version 3.0.20 or later.
1354 JH/06 Verification of the server certificate for a TLS connection is now tried
1355 (but not required) by default. The verification status is now logged by
1356 default, for both outbound TLS and client-certificate supplying inbound
1359 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1362 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1363 Status Notification (bounce) messages are now MIME format per RFC 3464.
1364 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1365 under the control of the dsn_advertise_hosts option, and routers may
1366 have a dsn_lasthop option.
1368 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1369 default, modifiable by a malware= option. The list separator for
1370 the options can now be changed in the usual way. Bug 68.
1372 JH/10 The smtp_receive_timeout main option is now expanded before use.
1374 JH/11 The incoming_interface log option now also enables logging of the
1375 local interface on delivery outgoing connections.
1377 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1378 if the interface and destination host and port all match.
1380 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1383 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1384 Patch from Andrew Lewis.
1386 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1387 now supports optional time-restrictions, weighting, and priority
1388 modifiers per server. Patch originally by <rommer@active.by>.
1390 JH/16 The spamd_address main option now supports a mixed list of local
1391 and remote servers. Remote servers can be IPv6 addresses, and
1392 specify a port-range.
1394 JH/17 Bug 68: The spamd_address main option now supports an optional
1395 timeout value per server.
1397 JH/18 Bug 1581: Router and transport options headers_add/remove can
1398 now have the list separator specified.
1400 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1403 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1406 JH/21 Support for the A6 type of dns record is withdrawn.
1408 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1409 rather than the verbs used.
1411 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1412 from 255 to 1024 chars.
1414 JH/24 Verification callouts now attempt to use TLS by default.
1416 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1417 are generic router options now. The defaults didn't change.
1419 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1420 Original patch from Alexander Shikoff, worked over by JH.
1422 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1423 files if ZCAT_COMMAND is not executable.
1425 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1427 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1429 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1430 Normally benign, it bites when the pair was led to by a CNAME;
1431 modern usage is to not canonicalize the domain to a CNAME target
1432 (and we were inconsistent anyway for A-only vs AAAA+A).
1434 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1436 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1437 when evaluating $sender_host_dnssec.
1439 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1440 $sender_helo_dnssec variable.
1442 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1444 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1446 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1448 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1449 documented as working, but never had. Support all but $spam_report.
1451 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1452 added for tls authenticator.
1454 HS/03 Add perl_taintmode main config option
1460 TL/01 When running the test suite, the README says that variables such as
1461 no_msglog_check are global and can be placed anywhere in a specific
1462 test's script, however it was observed that placement needed to be near
1463 the beginning for it to behave that way. Changed the runtest perl
1464 script to read through the entire script once to detect and set these
1465 variables, reset to the beginning of the script, and then run through
1466 the script parsing/test process like normal.
1468 TL/02 The BSD's have an arc4random API. One of the functions to induce
1469 adding randomness was arc4random_stir(), but it has been removed in
1470 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1471 function when detected.
1473 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1474 cause callback expansion.
1476 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1477 syntax errors in an expansion can be treated as a string instead of
1478 logging or causing an error, due to the internal use of bool_lax
1479 instead of bool when processing it.
1481 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1482 server certificates when making smtp deliveries.
1484 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1486 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1488 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1490 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1491 Merged patch from Sebastian Wiedenroth.
1493 JH/05 Fix results-pipe from transport process. Several recipients, combined
1494 with certificate use, exposed issues where response data items split
1495 over buffer boundaries were not parsed properly. This eventually
1496 resulted in duplicates being sent. This issue only became common enough
1497 to notice due to the introduction of connection certificate information,
1498 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1500 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1501 size buffer was used, resulting in syntax errors when an expansion
1504 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1505 version 3.3.6 or later.
1507 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1508 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1509 both become "event_action", the variables become $event_name, $event_data
1510 and $event_defer_errno. There is a new variable $verify_mode, usable in
1511 routers, transports and related events. The tls:cert event is now also
1512 raised for inbound connections, if the main configuration event_action
1515 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1516 early OCSP support, but no stapling (appears to be less than 1.0.0).
1518 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1519 server certificate names available under the smtp transport option
1520 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1523 JH/10 Time-related extraction expansions from certificates now use the main
1524 option "timezone" setting for output formatting, and are consistent
1525 between OpenSSL and GnuTLS compilations. Bug 1541.
1527 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1528 encoded parameter in the incoming message. Bug 1558.
1530 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1531 include certificate info, eximon was claiming there were spoolfile
1534 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1536 JH/14 Log delivery-related information more consistently, using the sequence
1537 "H=<name> [<ip>]" wherever possible.
1539 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1540 are problematic for Debian distribution, omit them from the release
1543 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1545 JH/16 Fix string representation of time values on 64bit time_t architectures.
1548 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1549 output list separator was used.
1554 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1555 checkers that were complaining about end of non-void function with no
1558 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1559 This was a regression introduced in 4.83 by another bugfix.
1561 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1563 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1564 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1570 TF/01 Correctly close the server side of TLS when forking for delivery.
1572 When a message was received over SMTP with TLS, Exim failed to clear up
1573 the incoming connection properly after forking off the child process to
1574 deliver the message. In some situations the subsequent outgoing
1575 delivery connection happened to have the same fd number as the incoming
1576 connection previously had. Exim would try to use TLS and fail, logging
1577 a "Bad file descriptor" error.
1579 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1580 utilities have not been installed.
1582 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1583 temporary space as the ACL may create new global variables.
1585 TL/01 LDAP support uses per connection or global context settings, depending
1586 upon the detected version of the libraries at build time.
1588 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1589 to extract and use the src ip:port in logging and expansions as if it
1590 were a direct connection from the outside internet. PPv2 support was
1591 updated based on HAProxy spec change in May 2014.
1593 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1595 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1596 Properly escape header and check for NULL return.
1598 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1601 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1603 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1604 characters in header names, implemented as a verify condition.
1605 Contributed by Michael Fischer v. Mollard.
1607 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1608 results permerror and temperror. Previous values are deprecated but
1609 still accepted. In a future release, err_perm and err_temp will be
1610 completely removed, which will be a backward incompatibility if the
1611 ACL tests for either of these two old results. Patch contributed by
1612 user bes-internal on the mailing list.
1614 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1616 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1617 selectors, in both main and reject logs.
1619 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1622 JH/07 Add malware type "sock" for talking to simple daemon.
1624 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1626 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1627 routers/transports under cutthrough routing.
1629 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1630 numbers. Touch up "bool" conditional to keep the same definition.
1632 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1634 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1636 JH/12 Expand items in router/transport headers_add or headers_remove lists
1637 individually rather than the list as a whole. Bug 1452.
1639 Required for reasonable handling of multiple headers_ options when
1640 they may be empty; requires that headers_remove items with embedded
1641 colons must have them doubled (or the list-separator changed).
1643 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1644 view the policy declared in the DMARC record. Currently, $dmarc_status
1645 is a combined value of both the record presence and the result of the
1648 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1650 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1651 dnslookup router and the smtp transport (applying to the forward
1654 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1655 of ldap servers used for a specific lookup. Patch provided by Heiko
1658 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1659 New variable $lookup_dnssec_authenticated for observability.
1661 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1662 Patch submitted by Lars Timman.
1664 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1666 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1667 Requires trusted mode and valid format message id, aborts otherwise.
1668 Patch contributed by Heiko Schlichting.
1670 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1671 certextract with support for various fields. Bug 1358.
1673 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1674 is requested by default, modifiable by smtp transport option
1677 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1678 operate on certificate variables to give certificate fingerprints
1679 Also new ${sha256:cert_variable}.
1681 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1683 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1684 Christian Aistleitner.
1686 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1688 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1689 file. Patch from Wolfgang Breyha.
1691 JH/25 Expand the coverage of the delivery $host and $host_address to
1692 client authenticators run in verify callout. Bug 1476.
1694 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1695 align with daemon_smtp_ports. Bug 72.
1697 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1698 support and error reporting did not work properly.
1700 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1701 and is readable. Patch from Andrew Colin Kissa.
1703 TL/14 Enhance documentation of ${run expansion and how it parses the
1704 commandline after expansion, particularly in the case when an
1705 unquoted variable expansion results in an empty value.
1707 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1709 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1710 by renaming away from it. Addresses GH issue 15, reported by
1713 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1715 TL/15 SECURITY: prevent double expansion in math comparison functions
1716 (can expand unsanitized data). Not remotely exploitable.
1723 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1725 PP/02 Make -n do something, by making it not do something.
1726 When combined with -bP, the name of an option is not output.
1728 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1731 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1732 $sender_host_name and config options to manage this, and basic check
1735 PP/05 DSCP support for outbound connections and control modifier for inbound.
1737 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1738 (Only plugin which currently uses this is kerberos4, which nobody should
1739 be using, but we should make it available and other future plugins might
1740 conceivably use it, even though it would break NAT; stuff *should* be
1741 using channel bindings instead).
1743 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1744 name; added for Sendmail compatibility; requires admin caller.
1745 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1746 just ignore it); requires trusted caller.
1747 Also parse but ignore: -Ac -Am -X<logfile>
1750 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1752 TL/02 Add +smtp_confirmation as a default logging option.
1754 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1755 Patch by Magnus Holmgren from 2007-02-20.
1757 TL/04 Bugzilla 1281 - Spec typo.
1758 Bugzilla 1283 - Spec typo.
1759 Bugzilla 1290 - Spec grammar fixes.
1761 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1763 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1765 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1766 mailing list by by Dmitry Isaikin.
1768 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1770 JH/02 Support "G" suffix to numbers in ${if comparisons.
1772 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1774 NM/01 Bugzilla 1197 - Spec typo
1775 Bugzilla 1196 - Spec examples corrections
1777 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1779 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1780 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1783 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1784 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1786 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1787 "acl {{name}{arg}...}", and optional args on acl condition
1790 JH/05 Permit multiple router/transport headers_add/remove lines.
1792 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1794 JH/07 Avoid using a waiting database for a single-message-only transport.
1795 Performance patch from Paul Fisher. Bugzilla 1262.
1797 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1800 JH/09 Add $headers_added variable, with content from use of ACL modifier
1801 add_header (but not yet added to the message). Bugzilla 199.
1803 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1804 Pulled from Bugzilla 817 by Wolfgang Breyha.
1806 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1808 (nb: this is the same fix as in Exim 4.80.1)
1810 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1813 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1816 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1818 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1819 advertise SMTP AUTH mechanism to us, instead of a generic
1820 protocol violation error. Also, make Exim more robust to bad
1821 data from the Dovecot auth socket.
1823 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1825 When a queue runner is handling a message, Exim first routes the
1826 recipient addresses, during which it prunes them based on the retry
1827 hints database. After that it attempts to deliver the message to
1828 any remaining recipients. It then updates the hints database using
1831 So if a recipient address works intermittently, it can get repeatedly
1832 deferred at routing time. The retry hints record remains fresh so the
1833 address never reaches the final cutoff time.
1835 This is a fairly common occurrence when a user is bumping up against
1836 their storage quota. Exim had some logic in its local delivery code
1837 to deal with this. However it did not apply to per-recipient defers
1838 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1840 This change adds a proper retry rule check during routing so that the
1841 final cutoff time is checked against the message's age. We only do
1842 this check if there is an address retry record and there is not a
1843 domain retry record; this implies that previous attempts to handle
1844 the address had the retry_use_local_parts option turned on. We use
1845 this as an approximation for the destination being like a local
1846 delivery, as in LMTP.
1848 I suspect this new check makes the old local delivery cutoff check
1849 redundant, but I have not verified this so I left the code in place.
1851 TF/02 Correct gecos expansion when From: is a prefix of the username.
1853 Test 0254 submits a message to Exim with the header
1857 When I ran the test suite under the user fanf2, Exim expanded
1858 the header to contain my full name, whereas it should have added
1859 a Resent-Sender: header. It erroneously treats any prefix of the
1860 username as equal to the username.
1862 This change corrects that bug.
1864 GF/01 DCC debug and logging tidyup
1865 Error conditions log to paniclog rather than rejectlog.
1866 Debug lines prefixed by "DCC: " to remove any ambiguity.
1868 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1870 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1871 Bug spotted by Jeremy Harris; was flawed since initial commit.
1872 Would have resulted in OCSP responses post-SNI triggering an Exim
1873 NULL dereference and crash.
1875 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1877 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1878 Bug detection, analysis and fix by Samuel Thibault.
1879 Bugzilla 1331, Debian bug #698092.
1881 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1883 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1884 Server implementation by Todd Lyons, client by JH.
1885 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1886 config variable "prdr_enable" controls whether the server
1887 advertises the facility. If the client requests PRDR a new
1888 acl_data_smtp_prdr ACL is called once for each recipient, after
1889 the body content is received and before the acl_smtp_data ACL.
1890 The client is controlled by both of: a hosts_try_prdr option
1891 on the smtp transport, and the server advertisement.
1892 Default client logging of deliveries and rejections involving
1893 PRDR are flagged with the string "PRDR".
1895 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1896 fclose(). Diagnosis by Todd Lyons.
1898 PP/17 Update configure.default to handle IPv6 localhost better.
1899 Patch by Alain Williams (plus minor tweaks).
1902 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1903 This is now consistent with GnuTLS, and is now documented: the
1904 previous undocumented portable approach to treating the option as
1905 unset was to force an expansion failure. That still works, and
1906 an empty string is now equivalent.
1908 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1909 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1910 not performing validation itself.
1912 PP/20 Added force_command boolean option to pipe transport.
1913 Patch from Nick Koston, of cPanel Inc.
1915 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1918 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1920 PP/21 Fix eximon continuous updating with timestamped log-files.
1921 Broken in a format-string cleanup in 4.80, missed when I repaired the
1922 other false fix of the same issue.
1923 Report and fix from Heiko Schlichting.
1926 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1927 Report from Prashanth Katuri.
1929 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1930 It's SecureTransport, so affects any MacOS clients which use the
1931 system-integrated TLS libraries, including email clients.
1933 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1934 using a MIME ACL for non-SMTP local injection.
1935 Report and assistance in diagnosis by Warren Baker.
1937 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1939 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1941 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1942 last id that failed so it may be referenced in subsequent ACL's.
1944 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1947 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1948 ldap library initialization, allowing self-signed CA's to be
1949 used. Also properly sets require_cert option later in code by
1950 using NULL (global ldap config) instead of ldap handle (per
1951 session). Bug diagnosis and testing by alxgomz.
1953 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1954 the src/util/ subdirectory.
1956 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1957 renamed to Transport Post Delivery Action by Jeremy Harris, as
1960 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1961 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1962 redis_servers = needs to be configured which will be used by the redis
1963 lookup. Patch from Warren Baker, of The Packet Hub.
1965 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1967 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1968 hostname or reverse DNS when processing a host list. Used suggestions
1969 from multiple comments on this bug.
1971 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1973 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1974 Missed a few lines, added it to make the runtest require no keyboard
1977 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1978 contains upper case chars. Make router use caseful_local_part.
1980 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1981 support when GnuTLS has been built with p11-kit.
1987 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1989 This, or similar/improved, will also be change PP/11 of 4.82.
1995 PP/01 Handle short writes when writing local log-files.
1996 In practice, only affects FreeBSD (8 onwards).
1997 Bugzilla 1053, with thanks to Dmitry Isaikin.
1999 NM/01 Bugzilla 949 - Documentation tweak
2001 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2004 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2006 PP/02 Implemented gsasl authenticator.
2008 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2010 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2011 `pkg-config foo` for cflags/libs.
2013 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2014 with rest of GSASL and with heimdal_gssapi.
2016 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2017 `pkg-config foo` for cflags/libs for the TLS implementation.
2019 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2020 properties get this fed in as external SSF. A number of robustness
2021 and debugging improvements to the cyrus_sasl authenticator.
2023 PP/08 cyrus_sasl server now expands the server_realm option.
2025 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2026 Patch by Jeremy Harris.
2028 PP/10 Added dbmjz lookup type.
2030 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2032 PP/12 MAIL args handles TAB as well as SP, for better interop with
2033 non-compliant senders.
2034 Analysis and variant patch by Todd Lyons.
2036 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2037 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2038 Patch from Dirk Mueller <dmueller@suse.com>
2040 PP/13 tls_peerdn now print-escaped for spool files.
2041 Observed some $tls_peerdn in wild which contained \n, which resulted
2042 in spool file corruption.
2044 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2045 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2046 or write after TLS renegotiation, which otherwise led to messages
2049 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2050 as a tracking header (ie: a signed header comes before the signature).
2051 Patch from Wolfgang Breyha.
2053 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2054 comma-sep list; embedded commas doubled.
2056 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2058 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2060 Report and patch from Dmitry Banschikov.
2062 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2063 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2064 failures. We appear to now support TLS1.1+ with Exim.
2066 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2067 lets Exim select keys and certificates based upon TLS SNI from client.
2068 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2069 before an outbound SMTP session. New log_selector, +tls_sni.
2071 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2072 NULL dereference. Report and patch from Alun Jones.
2074 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2075 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2076 Not seeing resolver debug output on NetBSD, but suspect this is a
2077 resolver implementation change.
2079 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2080 Left warnings. Added "eximon gdb" invocation mode.
2082 PP/21 Defaulting "accept_8bitmime" to true, not false.
2084 PP/22 Added -bw for inetd wait mode support.
2086 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2087 locate the relevant includes and libraries. Made this the default.
2089 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2090 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2092 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2093 This may cause build issues on older platforms.
2095 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2096 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2097 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2098 Added SNI support via GnuTLS too.
2099 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2101 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2103 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2104 Applied second patch from Janne, implementing suggestion to default
2105 multiple-strings-in-record handling to match SPF spec.
2107 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2109 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2110 read-only, out of scope).
2111 Patch from Wolfgang Breyha, report from Stuart Northfield.
2113 PP/29 Fix three issues highlighted by clang analyser static analysis.
2114 Only crash-plausible issue would require the Cambridge-specific
2115 iplookup router and a misconfiguration.
2116 Report from Marcin Mirosław.
2118 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2120 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2121 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2122 As part of this, removing so much warning spew let me fix some minor
2123 real issues in debug logging.
2125 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2126 assignment on my part. Fixed.
2128 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2129 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2130 Janne Snabb (who went above and beyond: thank you).
2132 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2133 string otherwise requires a connection and a bunch more work and it's
2134 relatively easy to get wrong. Should also expose TLS library linkage
2137 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2138 64-bit ${eval} (JH/03).
2140 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2141 GNU libc to support some of the 64-bit stuff, should not lead to
2142 conflicts. Defined before os.h is pulled in, so if a given platform
2143 needs to override this, it can.
2145 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2146 protection layer was required, which is not implemented.
2147 Bugzilla 1254, patch from Wolfgang Breyha.
2149 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2150 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2151 tls_dhparam take prime identifiers. Also unbreak combination of
2152 OpenSSL+DH_params+TLSSNI.
2154 PP/39 Disable SSLv2 by default in OpenSSL support.
2160 PP/01 Solaris build fix for Oracle's LDAP libraries.
2161 Bugzilla 1109, patch from Stephen Usher.
2163 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2165 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2168 TF/02 Fix a couple more cases where we did not log the error message
2169 when unlink() failed. See also change 4.74-TF/03.
2171 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2172 lock up or crash if it happened to be inside a call to libc when it
2173 got a SIGUSR1 from exiwhat.
2175 The SIGUSR1 handler appends the current process status to the process
2176 log which is later printed by exiwhat. It used to use the general
2177 purpose logging code to do this, but several functions it calls are
2178 not safe for signals.
2180 The new output code in the SIGUSR1 handler is specific to the process
2181 log, and simple enough that it's easy to inspect for signal safety.
2182 Removing some special cases also simplifies the general logging code.
2183 Removing the spurious timestamps from the process log simplifies
2186 TF/04 Improved ratelimit ACL condition.
2188 The /noupdate option has been deprecated in favour of /readonly which
2189 has clearer semantics. The /leaky, /strict, and /readonly update modes
2190 are mutually exclusive. The update mode is no longer included in the
2191 database key; it just determines when the database is updated. (This
2192 means that when you upgrade Exim will forget old rate measurements.)
2194 Exim now checks that the per_* options are used with an update mode that
2195 makes sense for the current ACL. For example, when Exim is processing a
2196 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2197 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2198 must specify per_mail/readonly. If you omit the update mode it defaults to
2199 /leaky where that makes sense (as before) or /readonly where required.
2201 The /noupdate option is now undocumented but still supported for
2202 backwards compatibility. It is equivalent to /readonly except that in
2203 ACLs where /readonly is required you may specify /leaky/noupdate or
2204 /strict/noupdate which are treated the same as /readonly.
2206 A useful new feature is the /count= option. This is a generalization
2207 of the per_byte option, so that you can measure the throughput of other
2208 aggregate values. For example, the per_byte option is now equivalent
2209 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2211 The per_rcpt option has been generalized using the /count= mechanism
2212 (though it's more complicated than the per_byte equivalence). When it is
2213 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2214 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2215 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2216 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2217 Note that using per_rcpt with a non-readonly update mode in more than
2218 one ACL will cause the recipients to be double-counted. (The per_mail
2219 and per_byte options don't have this problem.)
2221 The handling of very low rates has changed slightly. If the computed rate
2222 is less than the event's count (usually one) then this event is the first
2223 after a long gap. In this case the rate is set to the same as this event's
2224 count, so that the first message of a spam run is counted properly.
2226 The major new feature is a mechanism for counting the rate of unique
2227 events. The new per_addr option counts the number of different
2228 recipients that someone has sent messages to in the last time period. It
2229 behaves like per_rcpt if all the recipient addresses are different, but
2230 duplicate recipient addresses do not increase the measured rate. Like
2231 the /count= option this is a general mechanism, so the per_addr option
2232 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2233 example, measure the rate that a client uses different sender addresses
2234 with the options per_mail/unique=$sender_address. There are further
2235 details in the main documentation.
2237 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2239 TF/06 Removed a few PCRE remnants.
2241 TF/07 Automatically extract Exim's version number from tags in the git
2242 repository when doing development or release builds.
2244 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2245 Bugzilla 879. Patch from Paul Fisher.
2247 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2248 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2251 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2253 PP/05 Variable $av_failed, true if the AV scanner deferred.
2254 Bugzilla 1078. Patch from John Horne.
2256 PP/06 Stop make process more reliably on build failure.
2257 Bugzilla 1087. Patch from Heiko Schlittermann.
2259 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2260 Bugzilla 1089. Patch from Heiko Schlittermann.
2262 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2263 Bugzilla 1131. Patch from Holger Weiß.
2265 PP/09 Handle IPv6 addresses with SPF.
2266 Bugzilla 860. Patch from Wolfgang Breyha.
2268 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2270 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2273 PP/11 match_* no longer expand right-hand-side by default.
2274 New compile-time build option, EXPAND_LISTMATCH_RHS.
2275 New expansion conditions, "inlist", "inlisti".
2277 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2279 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2281 PP/14 fix log_write() format string regression from TF/03.
2282 Bugzilla 1152. Patch from Dmitry Isaikin.
2288 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2290 PP/02 Harmonised TLS library version reporting; only show if debugging.
2291 Layout now matches that introduced for other libraries in 4.74 PP/03.
2293 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2295 PP/04 New "dns_use_edns0" global option.
2297 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2300 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2301 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2303 TK/01 Updated PolarSSL code to 0.14.2.
2304 Bugzilla 1097. Patch from Andreas Metzler.
2306 PP/07 Catch divide-by-zero in ${eval:...}.
2307 Fixes bugzilla 1102.
2309 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2312 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2313 format-string attack -- SECURITY: remote arbitrary code execution.
2315 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2316 time unintentionally subject to list matching rules, letting the header
2317 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2318 arbitrary string expansion). This allowed for information disclosure.
2320 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2321 INT_MIN/-1 -- value coerced to INT_MAX.
2327 NM/01 Workaround for PCRE version dependency in version reporting
2330 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2331 This fixes portability to compilers other than gcc, notably
2332 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2334 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2335 makefiles for portability to HP-UX and POSIX correctness.
2337 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2338 Also via indented variable definition in the Makefile.
2339 (Debugging by Oliver Heesakkers).
2341 PP/02 Restore caching of spamd results with expanded spamd_address.
2342 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2344 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2345 Improves build reliability. Fix from: Frank Elsner
2347 NM/02 Fix wide character breakage in the rfc2047 coding
2348 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2350 NM/03 Allow underscore in dnslist lookups
2351 Fixes bug 1026. Patch from Graeme Fowler
2353 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2354 Code patches from Adam Ciarcinski of NetBSD.
2356 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2359 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2360 is logged, to avoid truncation. Patch from John Horne.
2362 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2363 Patch from Jakob Hirsch.
2365 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2366 SQL string expansion failure details.
2367 Patch from Andrey Oktyabrski.
2369 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2370 Patch from Simon Arlott.
2372 PP/09 New lookups functionality failed to compile on old gcc which rejects
2373 extern declarations in function scope.
2374 Patch from Oliver Fleischmann
2376 PP/10 Use sig_atomic_t for flags set from signal handlers.
2377 Check getgroups() return and improve debugging.
2378 Fixed developed for diagnosis in bug 927 (which turned out to be
2381 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2382 Patch from Mark Zealey.
2384 PP/12 Bugzilla 1056: Improved spamd server selection.
2385 Patch from Mark Zealey.
2387 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2388 Based on patch from Heiko Schlittermann.
2390 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2391 Patch from Uwe Doering, sign-off by Michael Haardt.
2393 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2394 variable declaration deep within a block. Bug and patch from
2397 PP/15 lookups-Makefile IRIX compatibility coercion.
2399 PP/16 Make DISABLE_DKIM build knob functional.
2401 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2402 Patch by Simon Arlott
2404 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2405 variable argument macros. Our copy now differs from upstream.
2411 TF/01 Failure to get a lock on a hints database can have serious
2412 consequences so log it to the panic log.
2414 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2415 controlled using the smtp_confirmation log selector.
2417 TF/03 Include the error message when we fail to unlink a spool file.
2419 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2420 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2421 for maintaining out-of-tree patches for some time.
2423 PP/01 Bugzilla 139: Documentation and portability issues.
2424 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2425 Handle per-OS dynamic-module compilation flags.
2427 PP/02 Let /dev/null have normal permissions.
2428 The 4.73 fixes were a little too stringent and complained about the
2429 permissions on /dev/null. Exempt it from some checks.
2430 Reported by Andreas M. Kirchwitz.
2432 PP/03 Report version information for many libraries, including
2433 Exim version information for dynamically loaded libraries. Created
2434 version.h, now support a version extension string for distributors
2435 who patch heavily. Dynamic module ABI change.
2437 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2438 privilege escalation vulnerability whereby the Exim run-time user
2439 can cause root to append content of the attacker's choosing to
2442 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2445 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2446 If dropping privileges for untrusted macros, we disabled normal logging
2447 on the basis that it would fail; for the Exim run-time user, this is not
2448 the case, and it resulted in successful deliveries going unlogged.
2449 Fixed. Reported by Andreas Metzler.
2455 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2456 only prepend for the Resent-* case. Fixes regression introduced in
2457 Exim 4.70 by NM/22 for Bugzilla 607.
2459 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2460 increasing numbers of administrators be bitten by this.
2462 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2464 PP/03 Bugzilla 994: added openssl_options main configuration option.
2466 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2468 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2470 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2472 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2473 without a peer certificate, leading to a segfault because of an
2474 assumption that peers always have certificates. Be a little more
2475 paranoid. Problem reported by Martin Tscholak.
2477 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2478 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2479 NB: ClamAV planning to remove STREAM in "middle of 2010".
2480 CL also introduces -bmalware, various -d+acl logging additions and
2481 more caution in buffer sizes.
2483 PP/09 Implemented reverse_ip expansion operator.
2485 PP/10 Bugzilla 937: provide a "debug" ACL control.
2487 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2489 PP/12 Bugzilla 973: Implement --version.
2491 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2493 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2495 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2497 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2498 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2499 ignore trailing whitespace.
2501 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2503 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2506 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2507 Notification from Dr Andrew Aitchison.
2509 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2510 ExtendedDetectionInfo response format.
2511 Notification from John Horne.
2513 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2516 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2517 XSL and documented dependency on system catalogs, with examples of how
2520 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2523 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2524 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2525 configuration file which is writeable by the Exim user or group.
2527 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2528 of configuration files to cover files specified with the -C option if
2529 they are going to be used with root privileges, not just the default
2532 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2533 option (effectively making it always true).
2535 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2536 files to be used while preserving root privileges.
2538 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2539 that rogue child processes cannot use them.
2541 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2542 run-time user, instead of root.
2544 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2545 Exim run-time user without dropping privileges.
2547 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2548 result string, instead of calling string_vformat() twice with the same
2551 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2552 for other users. Others should always drop root privileges if they use
2553 -C on the command line, even for a whitelisted configure file.
2555 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2557 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2563 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2564 $data_path, and $header_path variables; fixed documentation bugs and
2567 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2568 exipick to access non-standard spools, including the "frozen" queue
2571 NM/01 Bugzilla 965: Support mysql stored procedures.
2572 Patch from Alain Williams
2574 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2576 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2577 Patch from Andreas Metzler
2579 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2580 Patch from Kirill Miazine
2582 NM/05 Bugzilla 671: Added umask to procmail example.
2584 JJ/03 installed exipick 20100323.0, fixing doc bug
2586 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2587 directory. Notification and patch from Dan Rosenberg.
2589 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2591 TK/02 Improve log output when DKIM signing operation fails.
2593 MH/01 Treat the transport option dkim_domain as a colon separated
2594 list, not as a single string, and sign the message with each element,
2595 omitting multiple occurences of the same signer.
2597 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2598 Bugzilla 985, 986. Patch by Simon Arlott
2600 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2601 Patch by Simon Arlott
2603 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2604 MBX locking. Notification from Dan Rosenberg.
2610 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2612 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2614 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2616 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2618 NM/04 Bugzilla 915: Flag broken perl installation during build.
2624 TK/01 Added patch by Johannes Berg that expands the main option
2625 "spamd_address" if it starts with a dollar sign.
2627 TK/02 Write list of recipients to X-Envelope-Sender header when building
2628 the mbox-format spool file for content scanning (suggested by Jakob
2631 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2632 (http://www.dcc-servers.net/) support via dccifd. Activated by
2633 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2635 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2636 by Mark Daniel Reidel <mr@df.eu>.
2638 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2639 When building exim an external PCRE library is now needed -
2640 PCRE is a system library on the majority of modern systems.
2641 See entry on PCRE_LIBS in EDITME file.
2643 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2644 conversation. Added nologin parameter to request.
2645 Patch contributed by Kirill Miazine.
2647 TF/01 Do not log submission mode rewrites if they do not change the address.
2649 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2651 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2652 log files in place. Contributed by Roberto Lima.
2654 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2656 TF/03 Bugzilla 615: When checking the local_parts router precondition
2657 after a local_part_suffix or local_part_prefix option, Exim now
2658 does not use the address's named list lookup cache, since this
2659 contains cached lookups for the whole local part.
2661 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2662 Robert Millan. Documentation is in experimental-spec.txt.
2664 TF/04 Bugzilla 668: Fix parallel build (make -j).
2666 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2668 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2669 Patch provided by Jan Srzednicki.
2671 TF/05 Leading white space used to be stripped from $spam_report which
2672 wrecked the formatting. Now it is preserved.
2674 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2675 that they are available at delivery time.
2677 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2679 TF/08 TLS error reporting now respects the incoming_interface and
2680 incoming_port log selectors.
2682 TF/09 Produce a more useful error message if an SMTP transport's hosts
2683 setting expands to an empty string.
2685 NM/06 Bugzilla 744: EXPN did not work under TLS.
2686 Patch provided by Phil Pennock.
2688 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2689 Patch provided by Richard Godbee.
2691 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2692 acl_smtp_notquit, added index entry.
2694 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2695 Patch provided by Eugene Bujak.
2697 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2698 accept(). Patch provided by Maxim Dounin.
2700 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2701 Patch provided by Phil Pennock.
2703 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2705 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2706 Patch provided by Brad "anomie" Jorsch.
2708 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2709 Patch provided by Dean Brooks.
2711 TK/05 Add native DKIM support (does not depend on external libraries).
2713 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2714 Patch provided by Graeme Fowler.
2716 NM/16 Bugzilla 851: Documentation example syntax fix.
2718 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2720 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2723 NM/19 Bugzilla 745: TLS version reporting.
2724 Patch provided by Phil Pennock.
2726 NM/20 Bugzilla 167: bool: condition support.
2727 Patch provided by Phil Pennock.
2729 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2730 clients. Patch provided by Phil Pennock.
2732 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2733 Patch provided by Brad "anomie" Jorsch.
2735 NM/23 Bugzilla 687: Fix misparses in eximstats.
2736 Patch provided by Heiko Schlittermann.
2738 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2739 Patch provided by Heiko Schlittermann.
2741 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2742 plus update to original patch.
2744 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2746 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2747 Patch provided by David Brownlee.
2749 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2751 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2753 NM/30 Bugzilla 888: TLS documentation bugfixes.
2755 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2757 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2758 Unlike the original bugzilla I have changed all shell scripts in src tree.
2760 NM/33 Bugzilla 898: Transport filter timeout fix.
2761 Patch by Todd Rinaldo.
2763 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2764 Patch by Serge Demonchaux.
2766 NM/35 Bugzilla 39: Base64 decode bug fixes.
2767 Patch by Jakob Hirsch.
2769 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2771 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2773 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2775 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2781 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2782 ALT-N's libdkim that I have put here:
2783 http://duncanthrax.net/exim-experimental/
2785 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2786 were called 'true' and it seems that C99 defines that as a reserved
2787 keyword to be used with 'bool' variable types. That means you could
2788 not include C99-style headers which use bools without triggering
2789 build errors in sieve.c.
2791 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2792 as mailq or other aliases. Changed the --help handling significantly
2793 to do whats expected. exim_usage() emits usage/help information.
2795 SC/01 Added the -bylocaldomain option to eximstats.
2797 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2799 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2801 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2807 PH/01 Another patch from the Sieve maintainer.
2809 PH/02 When an IPv6 address is converted to a string for single-key lookup
2810 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2811 dots are used instead of colons so that keys in lsearch files need not
2812 contain colons. This was done some time before quoting was made available
2813 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2814 (notated using the quote facility) so as to distinguish them from IPv4
2815 keys. This meant that lookups for IP addresses in host lists did not work
2816 for iplsearch lookups.
2818 This has been fixed by arranging for IPv6 addresses to be expressed with
2819 colons if the lookup type is iplsearch. This is not incompatible, because
2820 previously such lookups could never work.
2822 The situation is now rather anomalous, since one *can* have colons in
2823 ordinary lsearch keys. However, making the change in all cases is
2824 incompatible and would probably break a number of configurations.
2826 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2829 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2830 conversion specification without a maximum field width, thereby enabling
2831 a rogue spamd server to cause a buffer overflow. While nobody in their
2832 right mind would setup Exim to query an untrusted spamd server, an
2833 attacker that gains access to a server running spamd could potentially
2834 exploit this vulnerability to run arbitrary code as the Exim user.
2836 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2837 $primary_hostname instead of what libspf2 thinks the hosts name is.
2839 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2840 a directory entry by the name of the lookup key. Previously, if a
2841 symlink pointed to a non-existing file or a file in a directory that
2842 Exim lacked permissions to read, a lookup for a key matching that
2843 symlink would fail. Now it is enough that a matching directory entry
2844 exists, symlink or not. (Bugzilla 503.)
2846 PH/03 The body_linecount and body_zerocount variables are now exported in the
2849 PH/04 Added the $dnslist_matched variable.
2851 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2852 This means they are set thereafter only if the connection becomes
2855 PH/06 Added the client_condition to authenticators so that some can be skipped
2856 by clients under certain conditions.
2858 PH/07 The error message for a badly-placed control=no_multiline_responses left
2859 "_responses" off the end of the name.
2861 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2863 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2864 (without spaces) instead of just copying the configuration text.
2866 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2868 PH/11 Added $max_received_linelength.
2870 PH/12 Added +ignore_defer and +include_defer to host lists.
2872 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2873 way in which PCRE > 7.0 is built.
2875 PH/14 Implemented queue_only_load_latch.
2877 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2878 MAIL command. The effect was to mangle the value on 64-bit systems.
2880 PH/16 Another patch from the Sieve maintainer.
2882 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2884 PH/18 If a system quota error occurred while trying to create the file for
2885 a maildir delivery, the message "Mailbox is full" was not appended to the
2886 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2887 only to a quota excession during the actual writing of the file.
2889 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2890 characters?) which causes problems in log lines. The DN values are now
2891 passed through string_printing() before being added to log lines.
2893 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2894 and InterBase are left for another time.)
2896 PH/21 Added message_body_newlines option.
2898 PH/22 Guard against possible overflow in moan_check_errorcopy().
2900 PH/23 POSIX allows open() to be a macro; guard against that.
2902 PH/24 If the recipient of an error message contained an @ in the local part
2903 (suitably quoted, of course), incorrect values were put in $domain and
2904 $local_part during the evaluation of errors_copy.
2910 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2911 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2914 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2915 issue a MAIL command.
2917 PH/02 In an ACL statement such as
2919 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2921 if a client was not listed at all, or was listed with a value other than
2922 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2923 the condition was not true (as it should be), so access was not denied.
2924 The bug was that the ! inversion was incorrectly passed on to the second
2925 item. This has been fixed.
2927 PH/03 Added additional dnslists conditions == and =& which are different from
2928 = and & when the dns lookup returns more than one IP address.
2930 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2931 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2933 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2934 FSYNC, which compiles an option called disable_fsync that allows for
2935 bypassing fsync(). The documentation is heavily laced with warnings.
2937 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2939 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2940 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2941 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2942 including adding "make clean"; (3) Added -fPIC when compiling the test
2943 dynamically loaded module, to get rid of a warning.
2945 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2946 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2947 = 0s. The bug is otherwise harmless.
2949 PH/07 There was a bug in the dovecot authenticator such that the value of
2950 $auth1 could be overwritten, and so not correctly preserved, after a
2951 successful authentication. This usually meant that the value preserved by
2952 the server_setid option was incorrect.
2954 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2956 PH/09 Installed PCRE release 7.0.
2958 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2959 run for batched SMTP input. It is now run at the start of every message
2960 in the batch. While fixing this I discovered that the process information
2961 (output by running exiwhat) was not always getting set for -bs and -bS
2962 input. This is fixed, and it now also says "batched" for BSMTP.
2964 PH/11 Added control=no_pipelining.
2966 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2967 patch, slightly modified), and move the expansion of helo_data till after
2968 the connection is made in the smtp transport (so it can use these
2971 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2973 PH/14 Added log_selector = +pid.
2975 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2977 PH/16 Add ${if forany and ${if forall.
2979 PH/17 Added dsn_from option to vary the From: line in DSNs.
2981 PH/18 Flush SMTP output before performing a callout, unless control =
2982 no_callout_flush is set.
2984 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2985 was true (the default) a successful delivery failed to delete the retry
2986 item, thus causing premature timeout of the address. The bug is now
2989 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2991 PH/21 Long custom messages for fakedefer and fakereject are now split up
2992 into multiline responses in the same way that messages for "deny" and
2993 other ACL rejections are.
2995 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2996 with slight modification.
2998 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2999 draft, changing the syntax and factoring some duplicate code".
3001 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3002 for deliveries of the second and subsequent messages over the same SMTP
3005 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3006 ${reduce, with only minor "tidies".
3008 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3010 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3011 expansion side effects.
3013 PH/27 When a message times out after an over-quota error from an Exim-imposed
3014 quota, the bounce message says "mailbox is full". This message was not
3015 being given when it was a system quota that was exceeded. It now should
3018 MH/03 Made $recipients available in local_scan(). local_scan() already has
3019 better access to the recipient list through recipients_list[], but
3020 $recipients can be useful in postmaster-provided expansion strings.
3022 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3023 in the case of a MAIL command with additional options following the
3024 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3025 were accidentally chopped off.
3027 PH/29 SMTP synchronization checks are implemented when a command is read -
3028 there is a check that no more input is waiting when there shouldn't be
3029 any. However, for some commands, a delay in an ACL can mean that it is
3030 some time before the response is written. In this time, more input might
3031 arrive, invalidly. So now there are extra checks after an ACL has run for
3032 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3033 pipelining has not been advertised.
3035 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3037 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3038 returned in the SMTP response when smtp_return_error_details was false.
3039 This has been fixed.
3041 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3042 instead of the C I/O that was originally supplied, because problems were
3043 reported on Solaris.
3045 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3046 Exim which did not show up earlier: it was assuming that a call to
3047 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3048 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3049 was a macro that became an assignment, so it seemed to work. This has
3050 changed to a proper function call with a void return, hence the compile
3051 error. Exim's code has been fixed.
3053 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3056 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3058 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3060 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3061 because it turns out to be too big or there is a timeout) there is no
3062 "Completed" line in the log. When some messages of this type were
3063 selected by exigrep, they were listed as "not completed". Others were
3064 picked up by some special patterns. I have improved the selection
3065 criteria to be more general.
3067 PH/38 The host_find_failed option in the manualroute router can now be set
3068 to "ignore", to completely ignore a host whose IP address cannot be
3069 found. If all hosts are ignored, the behaviour is controlled by the new
3070 host_all_ignored option.
3072 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3073 homing or because of multiple MX records with /mx) generated more than
3074 one IP address, and the following item turned out to be the local host,
3075 all the secondary addresses of the first item were incorrectly removed
3076 from the list, along with the local host and any following hosts (which
3077 is what is supposed to happen).
3079 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3080 whoever called Exim into the -H file. In the case of the daemon it was
3081 behaving confusingly. When first started, it used values for whoever
3082 started the daemon, but after a SIGHUP it used the Exim user (because it
3083 calls itself on a restart). I have changed the code so that it now always
3086 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3087 message are rejected with the same error (e.g. no authentication or bad
3088 sender address), and a DATA command is nevertheless sent (as can happen
3089 with PIPELINING or a stupid MUA), the error message that was given to the
3090 RCPT commands is included in the rejection of the DATA command. This is
3091 intended to be helpful for MUAs that show only the final error to their
3094 PH/42 Another patch from the Sieve maintainer.
3096 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3097 Eximstats - Fixed some broken HTML links and added missing column headers
3099 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3100 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3102 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3104 PH/43 Yet another patch from the Sieve maintainer.
3106 PH/44 I found a way to check for a TCP/IP connection going away before sending
3107 the response to the final '.' that terminates a message, but only in the
3108 case where the client has not sent further data following the '.'
3109 (unfortunately, this is allowed). However, in many cases there won't be
3110 any further data because there won't be any more messages to send. A call
3111 to select() can be used: if it shows that the input is "ready", there is
3112 either input waiting, or the socket has been closed. An attempt to read
3113 the next input character can distinguish the two cases. Previously, Exim
3114 would have sent an OK response which the client would never have see.
3115 This could lead to message repetition. This fix should cure that, at
3116 least in a lot of common cases.
3118 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3119 advertised in response to EHLO.
3125 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3126 fixed by 4.65/MH/01 (is this a record?) are fixed:
3128 (i) An empty string was always treated as zero by the numeric comparison
3129 operators. This behaviour has been restored.
3131 (ii) It is documented that the numeric comparison operators always treat
3132 their arguments as decimal numbers. This was broken in that numbers
3133 starting with 0 were being interpreted as octal.
3135 While fixing these problems I realized that there was another issue that
3136 hadn't been noticed. Values of message_size_limit (both the global option
3137 and the transport option) were treated as octal if they started with 0.
3138 The documentation was vague. These values are now always treated as
3139 decimal, and I will make that clear in the documentation.
3145 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3146 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3149 MH/01 Don't check that the operands of numeric comparison operators are
3150 integers when their expansion is in "skipping" mode (fixes bug
3151 introduced by 4.64-PH/07).
3153 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3154 child addresses, Exim now panics and dies. Previously, because the count
3155 is held in a short int, deliveries were likely to be lost. As such a
3156 large number of recipients for a single message is ridiculous
3157 (performance will be very, very poor), I have chosen to impose a limit
3158 rather than extend the field.
3164 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3165 leftover -K file (the existence of which was triggered by #402).
3166 While we were at it, introduced process PID as part of the -K
3167 filename. This should rule out race conditions when creating
3170 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3171 processing considerably. Previous code took too long for large mails,
3172 triggering a timeout which in turn triggers #401.
3174 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3175 in the DK code in transports.c. sendfile() is not really portable,
3176 hence the _LINUX specificness.
3178 TF/01 In the add_headers option to the mail command in an Exim filter,
3179 there was a bug that Exim would claim a syntax error in any
3180 header after the first one which had an odd number of characters
3183 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3184 callout verification, Exim cached a "reject" for the entire domain. This
3185 is correct for most verifications, but it is not correct for a recipient
3186 verification with use_sender or use_postmaster set, because in that case
3187 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3188 case of MAIL FROM:<> rejection from other early rejections (e.g.
3189 rejection of HELO). When verifying a recipient using a non-null MAIL
3190 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3191 Whatever the result of the callout, the value of the domain cache is
3192 left unchanged (for any other kind of callout, getting as far as trying
3193 RCPT means that the domain itself is ok).
3195 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3198 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3199 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3200 session, the daemon ignores ECONNECT errors and logs others; it now
3201 ignores EPIPE as well.
3203 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3204 (quoted-printable decoding).
3206 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3207 later the small subsequent patch to fix an introduced bug.
3209 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3211 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3213 PH/08 An error is now given if message_size_limit is specified negative.
3215 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3216 to be given (somewhat) arbitrary names.
3218 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3221 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3222 miscellaneous code fixes
3224 PH/10 Added the log_reject_target ACL modifier to specify where to log
3227 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3228 hostname. This is wrong, because it relates to the incoming message (and
3229 probably the interface on which it is arriving) and not to the outgoing
3230 callout (which could be using a different interface). This has been
3231 changed to use the value of the helo_data option from the smtp transport
3232 instead - this is what is used when a message is actually being sent. If
3233 there is no remote transport (possible with a router that sets up host
3234 addresses), $smtp_active_hostname is used.
3236 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3237 tweaks were necessary in order to get it to work (see also 21 below):
3238 (a) The code assumed that strncpy() returns a negative number on buffer
3239 overflow, which isn't the case. Replaced with Exim's string_format()
3241 (b) There were several signed/unsigned issues. I just did the minimum
3242 hacking in of casts. There is scope for a larger refactoring.
3243 (c) The code used strcasecmp() which is not a standard C function.
3244 Replaced with Exim's strcmpic() function.
3245 (d) The code set only $1; it now sets $auth1 as well.
3246 (e) A simple test gave the error "authentication client didn't specify
3247 service in request". It would seem that Dovecot has changed its
3248 interface. Fortunately there's a specification; I followed it and
3249 changed what the client sends and it appears to be working now.
3251 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3254 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3255 address A is aliased to B and C, where B exists and C does not. Without
3256 -v the output is "A verified" because verification stops after a
3257 successful redirection if more than one address is generated. However,
3258 with -v the child addresses are also verified. Exim was outputting "A
3259 failed to verify" and then showing the successful verification for C,
3260 with its parentage. It now outputs "B failed to verify", showing B's
3261 parentage before showing the successful verification of C.
3263 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3264 look up a TXT record in a specific list after matching in a combined
3267 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3268 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3269 they consult the DNS. I had assumed they would set it the way they
3270 wanted; and indeed my experiments on Linux seem to show that in some
3271 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3272 To be on the safe side, however, I have now made the interface to
3273 host_find_byname() similar to host_find_bydns(), with an argument
3274 containing the DNS resolver options. The host_find_byname() function now
3275 sets these options at its start, just as host_find_bydns() does. The smtp
3276 transport options dns_qualify_single and dns_search_parents are passed to
3277 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3278 of host_find_byname() use the default settings of RES_DEFNAMES
3279 (qualify_single) but not RES_DNSRCH (search_parents).
3281 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3282 spool_read_header() do less string testing, by means of a preliminary
3283 switch on the second character of optional "-foo" lines. (This is
3284 overdue, caused by the large number of possibilities that now exist.
3285 Originally there were few.) While I was there, I also converted the
3286 str(n)cmp tests so they don't re-test the leading "-" and the first
3287 character, in the hope this might squeeze out yet more improvement.
3289 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3290 flag allowing group syntax was set by the header_syntax check but not
3291 turned off, possible causing trouble later; (2) The flag was not being
3292 set at all for the header_verify test, causing "group"-style headers to
3293 be rejected. I have now set it in this case, and also caused header_
3294 verify to ignore an empty address taken from a group. While doing this, I
3295 came across some other cases where the code for allowing group syntax
3296 while scanning a header line wasn't quite right (mostly, not resetting
3297 the flag correctly in the right place). These bugs could have caused
3298 trouble for malformed header lines. I hope it is now all correct.
3300 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3301 with the "reply" argument non-NULL. The code, however (which originally
3302 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3303 but it didn't always do it. This confused somebody who was copying the
3304 code for some other use. I have removed all the tests.
3306 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3307 feature that was used to support insecure browsers during the U.S. crypto
3308 embargo. It requires special client support, and Exim is probably the
3309 only MTA that supported it -- and would never use it because real RSA is
3310 always available. This code has been removed, because it had the bad
3311 effect of slowing Exim down by computing (never used) parameters for the
3312 RSA_EXPORT functionality.
3314 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3315 authenticator to fail if there's a tab character in the incoming data
3316 (there should never be unless someone is messing about, as it's supposed
3317 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3318 if the connection is using TLS or if the remote IP is the same as the
3319 local IP, and the "valid-client-cert option" if a client certificate has
3322 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3323 authenticators. This can be used for authorization after authentication
3324 succeeds. (In the case of plaintext, it servers for both authentication
3327 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3328 if any retry times were supplied.
3330 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3331 connection, where there is no client IP address to check. In this
3332 situation, the verify now always succeeds.
3334 PH/25 Applied John Jetmore's -Mset patch.
3336 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3338 PH/27 In a string expansion for a processed (not raw) header when multiple
3339 headers of the same name were present, leading whitespace was being
3340 removed from all of them, but trailing whitespace was being removed only
3341 from the last one. Now trailing whitespace is removed from each header
3342 before concatenation. Completely empty headers in a concatenation (as
3343 before) are ignored.
3345 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3346 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3348 PH/29 [Removed. This was a change that I later backed out, and forgot to
3349 correct the ChangeLog entry (that I had efficiently created) before
3350 committing the later change.]
3352 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3353 address errors (4xx response to RCPT) over the same connection as other
3354 messages routed to the same hosts. Such deliveries are always "forced",
3355 so retry times are not inspected. This resulted in far too many retries
3356 for the affected addresses. The effect occurred only when there were more
3357 hosts than the hosts_max_try setting in the smtp transport when it had
3358 the 4xx errors. Those hosts that it had tried were not added to the list
3359 of hosts for which the message was waiting, so if all were tried, there
3360 was no problem. Two fixes have been applied:
3362 (i) If there are any address or message errors in an SMTP delivery, none
3363 of the hosts (tried or untried) are now added to the list of hosts
3364 for which the message is waiting, so the message should not be a
3365 candidate for sending over the same connection that was used for a
3366 successful delivery of some other message. This seems entirely
3367 reasonable: after all the message is NOT "waiting for some host".
3368 This is so "obvious" that I'm not sure why it wasn't done
3369 previously. Hope I haven't missed anything, but it can't do any
3370 harm, as the worst effect is to miss an optimization.
3372 (ii) If, despite (i), such a delivery is accidentally attempted, the
3373 routing retry time is respected, so at least it doesn't keep
3374 hammering the server.
3376 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3377 in ${readsocket because some servers need this prod.
3379 PH/32 Added some extra debug output when updating a wait-xxx database.
3381 PH/33 The hint "could be header name not terminated by colon", which has been
3382 given for certain expansion errors for a long time, was not being given
3383 for the ${if def:h_colon_omitted{... case.
3385 PH/34 The spec says: "With one important exception, whenever a domain list is
3386 being scanned, $domain contains the subject domain." There was at least
3387 one case where this was not true.
3389 PH/35 The error "getsockname() failed: connection reset by peer" was being
3390 written to the panic log as well as the main log, but it isn't really
3391 panic-worthy as it just means the connection died rather early on. I have
3392 removed the panic log writing for the ECONNRESET error when getsockname()
3395 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3396 runs only) independently of the message's sender address. This meant
3397 that, if the 4xx error was in fact related to the sender, a different
3398 message to the same recipient with a different sender could confuse
3399 things. In particular, this can happen when sending to a greylisting
3400 server, but other circumstances could also provoke similar problems.
3401 I have changed the default so that the retry time for these errors is now
3402 based a combination of the sender and recipient addresses. This change
3403 can be overridden by setting address_retry_include_sender=false in the
3406 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3407 remote server are returned as part of bounce messages. This was not
3408 happening for LMTP over a pipe (the lmtp transport), but now it is the
3409 same for both kinds of LMTP.
3411 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3412 in header lines that were in fact CNAMEs. This is no longer the case.
3414 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3415 and queue runs started by the daemon processed all messages. This has
3416 been fixed so that -R and -S can now usefully be given with -q<time>.
3418 PH/40 Import PCRE release 6.7 (fixes some bugs).
3420 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3422 PH/42 Give an error if -q is specified more than once.
3424 PH/43 Renamed the variables $interface_address and $interface_port as
3425 $received_ip_address and $received_port, to make it clear that these
3426 values apply to message reception, and not to the outgoing interface when
3427 a message is delivered. (The old names remain recognized, of course.)
3429 PH/44 There was no timeout on the connect() call when using a Unix domain
3430 socket in the ${readsocket expansion. There now is.
3432 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3433 be meaningful with "accept".
3435 SC/01 Eximstats V1.43
3436 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3438 SC/02 Eximstats V1.44
3439 Use a glob alias rather than an array ref in the generated
3440 parser. This improves both readability and performance.
3442 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3443 Collect SpamAssassin and rejection statistics.
3444 Don't display local sender or destination tables unless
3445 there is data to show.
3446 Added average volumes into the top table text output.
3448 SC/04 Eximstats V1.46
3449 Collect data on the number of addresses (recipients)
3450 as well as the number of messages.
3452 SC/05 Eximstats V1.47
3453 Added 'Message too big' to the list of mail rejection
3454 reasons (thanks to Marco Gaiarin).
3456 SC/06 Eximstats V1.48
3457 Mainlog lines which have GMT offsets and are too short to
3458 have a flag are now skipped.
3460 SC/07 Eximstats V1.49 (Alain Williams)
3461 Added the -emptyok flag.
3463 SC/08 Eximstats V1.50
3464 Fixes for obtaining the IP address from reject messages.
3466 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3467 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3468 whitespace changes from 4.64-PH/27
3470 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3473 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3474 are found, allow negative numbers in numeric criteria)
3476 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3478 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3479 to match changes made in 4.64-PH/43
3481 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3483 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3484 "domain" is actually an IP address, and force a failure. This locks out
3485 those revolvers/nameservers that support "A-for-A" lookups, in
3486 contravention of the specifications.
3488 PH/48 When a host name was looked up from an IP address, and the subsequent
3489 forward lookup of the name timed out, the host name was left in
3490 $sender_host_name, contrary to the specification.
3492 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3493 restricted to single-key lookups, Exim was not diagnosing an error if
3494 * or *@ was used with a query-style lookup.
3496 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3498 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3499 long ago, but noone interested enough thought of it. Let's just say that
3500 the "1.1" means that there are some new functions that weren't there at
3501 some point in the past.
3503 PH/51 Error processing for expansion failure of helo_data from an smtp
3504 transport during callout processing was broken.
3506 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3507 tested/used via the -bh/-bhc/-bs options.
3509 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3510 bug, fixed in subsequent PCRE releases).
3512 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3513 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3515 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3521 SC/01 Use a glob alias rather than an array ref in eximstats generated
3522 parser. This improves both readability and performance.
3524 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3525 Don't display local sender or destination tables in eximstats unless
3526 there is data to show.
3527 Added average volumes into the eximstats top table text output.
3529 SC/03 Collect data on the number of addresses (recipients) as well
3530 as the number of messages in eximstats.
3532 TF/01 Correct an error in the documentation for the redirect router. Exim
3533 does (usually) call initgroups() when daemonizing.
3535 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3536 with consistent privilege compared to when running as a daemon.
3538 TF/03 Note in the spec that $authenticated_id is not set for local
3539 submissions from trusted users.
3541 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3542 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3544 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3545 by adding some example configuration directives to the default
3546 configuration file. A little bit of work is required to uncomment the
3547 directives and define how usernames and passwords are checked, but
3548 there is now a framework to start from.
3550 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3551 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3552 without this. I don't know how relevant this is to other LDAP libraries.
3554 PH/02 Add the verb name to the "unknown ACL verb" error.
3556 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3558 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3560 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3561 directory not expanded when it should be if an expanded home directory
3562 was set for the address (which is overridden by the transport).
3564 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3567 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3568 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3569 because it is too late at that time, and has no effect.
3571 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3572 security issue with \' (bugzilla #107). I could not use the
3573 PQescapeStringConn() function, because it needs a PGconn value as one of
3576 PH/08 When testing addresses using -bt, indicate those final addresses that
3577 are duplicates that would not cause an additional delivery. At least one
3578 person was confused, thinking that -bt output corresponded to deliveries.
3579 (Suppressing duplicates isn't a good idea as you lose the information
3580 about possibly different redirections that led to the duplicates.)
3582 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3583 systems where poll() doesn't work, in particular OS X.
3585 PH/10 Added more information to debugging output for retry time not reached.
3587 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3588 operations in malware.c.
3590 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3593 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3594 syslog_duplication set false, log lines that would normally be written
3595 both the the main log and to the reject log were not written to syslog at
3598 PH/14 In the default configuration, change the use of "message" in ACL warn
3599 statements to "add_header".
3601 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3602 not followed by a command (e.g. "seen endif").
3604 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3605 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3608 PH/17 Added extra conditions to the default value of delay_warning_condition
3612 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3613 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3614 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3617 The Auto-Submitted: and various List- headers are standardised, whereas I
3618 don't think Precedence: ever was.
3620 PH/18 Refactored debugging code in route_finduser() to show more information,
3621 in particular, the error code if getpwnam() issues one.
3623 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3624 This is apparently needed in addition to the PH/07 change above to avoid
3625 any possible encoding problems.
3627 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3628 but not after initializing Perl.
3630 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3631 output them only if debugging. By default they are written stderr,
3632 apparently, which is not desirable.
3634 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3637 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3640 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3642 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3643 authenticated or an ident call has been made. Suppress the default
3644 values for $authenticated_id and $authenticated_sender (but permit -oMai
3645 and -oMas) when testing with -bh.
3647 PH/24 Re-jigged the order of the tests in the default configuration so that the
3648 tests for valid domains and recipients precede the DNS black list and CSA
3649 tests, on the grounds that those ones are more expensive.
3651 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3652 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3653 This bug exists in every version of Exim that I still have, right back to
3656 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3657 However, an attempt to turn on case-sensitivity in a regex key by
3658 including (?-i) didn't work because the subject string was already
3659 lowercased, and the effects were non-intuitive. It turns out that a
3660 one-line patch can be used to allow (?-i) to work as expected.
3666 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3667 other effects) broke the use of negated acl sub-conditions.
3669 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3672 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3673 "Deny" causes Exim to reject the incoming connection with a 554 error.
3674 Unfortunately, if there is a major crisis, such as a disk failure,
3675 tcp-wrappers gives "deny", whereas what one would like would be some
3676 kind of temporary error. A kludge has been added to help with this.
3677 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3678 554 error is used if errno is still zero or contains ENOENT (which occurs
3679 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3682 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3684 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3685 errors. Otherwise a message that provokes a temporary error (when other
3686 messages do not) can cause a whole host to time out.
3688 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3689 addresses were routed directly to files or pipes from a redirect router.
3690 File deliveries just didn't batch; pipe deliveries might have suffered
3693 PH/06 A failure to get a lock for a hints database would erroneously always say
3694 "Failed to get write lock", even when it was really a read lock.
3696 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3697 of 0600. This has been changed to use the value of the lockfile_mode
3698 option (which defaults to 0600).
3700 PH/08 Applied small patch from the Sieve maintainer.
3702 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3703 folder from quota calculations, a direct delivery into this folder messed
3704 up the contents of the maildirsize file. This was because the regex was
3705 used only to exclude .Trash (or whatever) when the size of the mailbox
3706 was calculated. There was no check that a delivery was happening into an
3707 excluded directory. This bug has been fixed by ignoring all quota
3708 processing for deliveries into excluded directories.
3710 PH/10 Added the maildirfolder_create_regex option to appendfile.
3716 PH/01 The code for finding all the local interface addresses on a FreeBSD
3717 system running IPv6 was broken. This may well have applied to all BSD
3718 systems, as well as to others that have similar system calls. The broken
3719 code found IPv4 interfaces correctly, but gave incorrect values for the
3720 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3721 that it would not match correctly against @[] and not recognize the IPv6
3724 PH/02 The ipliteral router was not recognizing addresses of the form user@
3725 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3727 PH/03 Added disable_ipv6.
3729 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3730 decoded form, because it is most often used to construct To: headers
3731 lines in autoreplies, and the decoded form may well be syntactically
3732 invalid. However, $reply_address has leading white space removed, and all
3733 newlines turned into spaces so that the autoreply transport does not
3736 PH/05 If group was specified without a user on a router, and no group or user
3737 was specified on a transport, the group from the router was ignored.
3739 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3740 for visible compile-time settings that can be used to change these
3741 numbers, for those that want even more. Backwards compatibility with old
3742 spool files has been maintained. However, going back to a previous Exim
3743 release will lost any variables that are in spool files.
3745 PH/07 Two small changes when running in the test harness: increase delay when
3746 passing a TCP/IP connection to a new process, in case the original
3747 process has to generate a bounce, and remove special handling of
3748 127.0.0.2 (sic), which is no longer necessary.
3750 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3751 be the same on different OS.
3753 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3756 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3757 whether --show-vars was specified or not
3759 JJ/02 exipick: Added support for new ACL variable spool format introduced
3762 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3763 syntactically invalid From: or Reply-to: line, and a filter used this to
3764 generate an autoreply, and therefore failed to obtain an address for the
3765 autoreply, Exim could try to deliver to a non-existent relative file
3766 name, causing unrelated and misleading errors. What now happens is that
3767 it logs this as a hard delivery error, but does not attempt to create a
3770 PH/11 The exinext utility has a -C option for testing purposes, but although
3771 the given file was scanned by exinext itself; it wasn't being passed on
3772 when Exim was called.
3774 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3775 an end-of-file indication when reading a command response.
3777 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3778 compiled. In many other places in Exim, IPv6 addresses are always
3779 recognized, so I have changed this. It also means that IPv4 domain
3780 literals of the form [IPV4:n.n.n.n] are now always recognized.
3782 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3783 used if the router is not running as root, for example, when verifying at
3784 ACL time, or when using -bh. The debugging output from this situation was
3785 non-existent - all you got was a failure to exec. I have made two
3788 (a) Failures to set uid/gid, the current directory, or a process leader
3789 in a subprocess such as that created by queryprogram now generate
3790 suitable debugging output when -d is set.
3792 (b) The queryprogram router detects when it is not running as root,
3793 outputs suitable debugging information if -d is set, and then runs
3794 the subprocess without attempting to change uid/gid.
3796 PH/15 Minor change to Makefile for building test_host (undocumented testing
3799 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3800 additional section of a DNS packet that returns MX or SRV records.
3801 Instead, it always explicitly searches for A/AAAA records. This avoids
3802 major problems that occur when a DNS server includes only records of one
3803 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3804 fixed another bug: if SRV records were looked up and the corresponding
3805 address records were *not* found in the additional section, the port
3806 values from the SRV records were lost.
3808 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3809 using the correct key (the original address) when searching the retry
3810 rules in order to find which one to use for generating the retry hint.
3812 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3813 adding the default one. Similarly, if it contains a Reply-To: header, the
3814 errors_reply_to option, if set, is not used.
3816 PH/19 When calculating a retry time, Exim used to measure the "time since
3817 failure" by looking at the "first failed" field in the retry record. Now
3818 it does not use this if it is later than than the arrival time of the
3819 message. Instead it uses the arrival time. This makes for better
3820 behaviour in cases where some deliveries succeed, thus re-setting the
3821 "first failed" field. An example is a quota failure for a huge message
3822 when small messages continue to be delivered. Without this change, the
3823 "time since failure" will always be short, possible causing more frequent
3824 delivery attempts for the huge message than are intended.
3825 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3827 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3828 $1, $2, $3) because the numerical variables can be reset during some
3829 expansion items (e.g. "match"), thereby losing the authentication data.
3831 PH/21 Make -bV show the size of off_t variables so that the test suite can
3832 decide whether to run tests for quotas > 2G.
3834 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3835 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3836 filecount value is greater than 2G or if a quota value is greater than 2G
3837 on a system where the size of off_t is not greater than 4, a panic error
3840 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3841 never match. The debug and -bh output now contains an explicit error
3842 message indicating a malformed IPv4 address or mask.
3844 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3845 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3846 PH/23 above applies.
3848 PH/25 Do not write to syslog when running in the test harness. The only
3849 occasion when this arises is a failure to open the main or panic logs
3850 (for which there is an explicit test).
3852 PH/26 Added the /no_tell option to "control=freeze".
3854 PH/27 If a host name lookup failed very early in a connection, for example, if
3855 the IP address matched host_lookup and the reverse lookup yielded a name
3856 that did not have a forward lookup, an error message of the form "no IP
3857 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3858 could be logged. Now it outputs the IP address instead of "NULL".
3860 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3861 allows the sender and the authenticated sender to be set when
3862 submitting a message from within Exim. Since child_open_exim() is
3863 documented for local_scan(), the new function should be too.
3865 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3866 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3867 results in an empty string is now treated as unset.
3869 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3871 PH/31 Added sender_verify_fail logging option.
3873 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3874 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3875 tidied the source and removed it altogether.
3877 PH/33 When a queue run was abandoned because the load average was too high, a
3878 log line was always written; now it is written only if the queue_run log
3879 selector is set. In addition, the log line for abandonment now contains
3880 information about the queue run such as the pid. This is always present
3881 in "start" and "stop" lines but was omitted from the "abandon" line.
3883 PH/34 Omit spaces between a header name and the colon in the error message that
3884 is given when verify = headers_syntax fails (if there are lots of them,
3885 the message gets confusing).
3887 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3888 names, as there are now some PTR records that contain slashes. This check
3889 is only to protect against broken name servers that fall over on strange
3890 characters, so the fact that it applies to all lookups doesn't matter.
3892 PH/36 Now that the new test suite is complete, we can remove some of the
3893 special code in Exim that was needed for the old test suite. For example,
3894 sorting DNS records because real resolvers return them in an arbitrary
3895 order. The new test suite's fake resolver always returns records in the
3898 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3899 bounces) except when queue_only is set, to avoid logging races between
3900 the different processes.
3902 PH/38 Panic-die if .include specifies a non-absolute path.
3904 PH/39 A tweak to the "H" retry rule from its user.
3906 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3907 a label. They prevented compilation on older perls.
3909 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3910 a warning to be raised on newish perls.
3912 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3913 on queue. Changes to match documented behaviour of showing count of
3914 messages matching specified criteria.
3916 PH/40 Changed the default ident timeout from 30s to 5s.
3918 PH/41 Added support for the use of login_cap features, on those BSD systems
3919 that have them, for controlling the resources used by pipe deliveries.
3921 PH/42 The content-scanning code uses fopen() to create files in which to put
3922 message data. Previously it was not paying any attention to the mode of
3923 the files. Exim runs with umask(0) because the rest of the code creates
3924 files with open(), and sets the required mode explicitly. Thus, these
3925 files were ending up world-writeable. This was not a big issue, because,
3926 being within the spool directory, they were not world-accessible. I have
3927 created a function called modefopen, which takes an additional mode
3928 argument. It sets umask(777), creates the file, chmods it to the required
3929 mode, then resets the umask. All the relevant calls to fopen() in the
3930 content scanning code have been changed to use this function.
3932 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3933 to 24 hours. This avoids potential overflow problems when processing G
3934 and H retry rules. I suspect nobody ever tinkers with this value.
3936 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3938 PH/45 When the plaintext authenticator is running as a client, the server's
3939 challenges are checked to ensure they are valid base64 strings. By
3940 default, the authentication attempt is cancelled if an invalid string is
3941 received. Setting client_ignore_invalid_base64 true ignores these errors.
3942 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3943 they are received. Thus, the responses can be made to depend on the
3944 challenges. If an invalid string is ignored, an empty string is placed in
3947 PH/46 Messages that are created by the autoreply transport now contains a
3948 References: header, in accordance with RFCs 2822 and 3834.
3950 PH/47 Added authenticated_sender_force to the smtp transport.
3952 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3954 PH/49 Installed latest patch from the Sieve maintainer.
3956 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3957 was also set, the appendfile transport was unnecessarily scanning a
3958 directory of message files (e.g. for maildir delivery) to find the count
3959 of files (along with the size), even though it did not need this
3960 information. It now does the scan only if it needs to find either the
3961 size of the count of files.
3963 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3965 PH/52 Two bugs concerned with error handling when the smtp transport is
3968 (i) Exim was not creating retry information for temporary errors given
3969 for individual recipients after the DATA command when the smtp transport
3970 was used in LMTP mode. This meant that they could be retried too
3971 frequently, and not timed out correctly.
3973 (ii) Exim was setting the flag that allows error details to be returned
3974 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3975 recipients that were returned after the DATA command.
3977 PH/53 This is related to PH/52, but is more general: for any failing address,
3978 when detailed error information was permitted to be returned to the
3979 sender, but the error was temporary, then after the final timeout, only
3980 "retry timeout exceeded" was returned. Now it returns the full error as
3981 well as "retry timeout exceeded".
3983 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3984 do this, and (what is worse) MTAs that accept it.
3986 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3987 will now be deprecated.
3989 PH/56 New os.c-cygwin from the Cygwin maintainer.
3991 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3992 formats (previously only available in exim formats via -bpr, -bpru,
3993 and -bpra. Now also available in native and exiqgrep formats)
3995 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3996 with very large, slow to parse queues
3998 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4000 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4002 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4003 responses to authentication challenges, though it was showing the
4004 challenges; (ii) I've removed the CR characters from the debug output for
4007 PH/58 Allow for the insertion of a newline as well as a space when a string
4008 is turned into more than one encoded-word during RFC 2047 encoding. The
4009 Sieve code now uses this.
4011 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4012 data_4xx, lost_connection, tls_required.
4014 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4015 message was being sent as an SMTP response.
4017 PH/61 Add -l and -k options to exicyclog.
4019 PH/62 When verifying, if an address was redirected to one new address, so that
4020 verification continued, and the new address failed or deferred after
4021 having set something in $address_data, the value of $address_data was not
4022 passed back to the ACL. This was different to the case when no
4023 redirection occurred. The value is now passed back in both cases.
4025 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4026 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4027 use login_cap.h, so on its own it isn't the distinguishing feature. The
4028 new name refers directly to the setclassresources() function.
4030 PH/65 Added configuration files for NetBSD3.
4032 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4034 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4035 is preferred over IPv4.
4037 PH/68 The bounce_return_message and bounce_return_body options were not being
4038 honoured for bounces generated during the reception of non-SMTP messages.
4039 In particular, this applied to messages rejected by the ACL. This bug has
4040 been fixed. However, if bounce_return_message is true and bounce_return_
4041 body is false, the headers that are returned for a non-SMTP message
4042 include only those that have been read before the error was detected.
4043 (In the case of an ACL rejection, they have all been read.)
4045 PH/69 The HTML version of the specification is now built in a directory called
4046 spec_html instead of spec.html, because the latter looks like a path with
4047 a MIME-type, and this confuses some software.
4049 PH/70 Catch two compiler warnings in sieve.c.
4051 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4052 function verify_get_ident() calls ip_connect() to connect a socket, but
4053 if the "connect()" function timed out, ip_connect() used to close the
4054 socket. However, verify_get_ident() also closes the socket later, and in
4055 between Exim writes to the log, which may get opened at this point. When
4056 the socket was closed in ip_connect(), the log could get the same file
4057 descriptor number as the socket. This naturally causes chaos. The fix is
4058 not to close the socket in ip_connect(); the socket should be closed by
4059 the function that creates it. There was only one place in the code where
4060 this was missing, in the iplookup router, which I don't think anybody now
4061 uses, but I've fixed it anyway.
4063 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4064 well as to direct DNS lookups. Otherwise the handling of names in host
4065 lists is inconsistent and therefore confusing.
4071 PH/01 Two changes to the default runtime configuration:
4073 (1) Move the checks for relay_from_hosts and authenticated clients from
4074 after to before the (commented out) DNS black list checks.
4076 (2) Add control=submission to the relay_from_hosts and authenticated
4077 clients checks, on the grounds that messages accepted by these
4078 statements are most likely to be submissions.
4080 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4082 (1) Generate an error if the third argument for the ${prvs expansion is
4085 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4088 (3) Reset the variables that are obtained from the first argument of
4089 ${prvscheck and used in the second argument before leaving the code,
4090 because their memory is reclaimed, so using them afterwards may do
4093 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4094 one (it's much easier than Tom thought :-).
4096 (5) Because of (4), we can now allow for the use of $prvscheck_result
4097 inside the third argument.
4099 PH/03 For some reason, the default setting of PATH when running a command from
4100 a pipe transport was just "/usr/bin". I have changed it to
4103 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4104 anything to be listed in the output from -bV.
4106 PH/05 When a filter generated an autoreply, the entire To: header line was
4107 quoted in the delivery log line, like this:
4109 => >A.N.Other <ano@some.domain> <original@ddress> ...
4111 This has been changed so that it extracts the operative address. There
4112 may be more than one such address. If so, they are comma-separated, like
4115 => >ano@some.domain,ona@other.domain <original@ddress> ...
4117 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4118 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4119 not being looked up in the rDNS to get a host name, Exim was showing the
4120 IP address twice in Received: lines, even though the IP addresses were
4121 identical. For example:
4123 Received: from [1.2.3.4] (helo=[1.2.3.4])
4125 However, if the real host name was known, it was omitting the HELO data
4126 if it matched the actual IP address. This has been tidied up so that it
4127 doesn't show the same IP address twice.
4129 PH/07 When both +timestamp and +memory debugging was on, the value given by
4130 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4131 called by the debug printing, thereby overwriting the timestamp buffer.
4132 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4134 PH/08 When the original message was included in an autoreply transport, it
4135 always said "this is a copy of the message, including all the headers",
4136 even if body_only or headers_only was set. It now gives an appropriate
4139 PH/09 Applied a patch from the Sieve maintainer which:
4141 o fixes some comments
4142 o adds the (disabled) notify extension core
4143 o adds some debug output for the result of if/elsif tests
4144 o points to the current vacation draft in the documentation
4145 and documents the missing references header update
4149 o fixes a bug in processing the envelope test (when testing
4150 multiple envelope elements, the last element determined the
4153 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4154 Electronic Mail") by including:
4156 Auto-submitted: auto-generated
4158 in the messages that it generates (bounce messages and others, such as
4159 warnings). In the case of bounce messages for non-SMTP messages, there was
4160 also a typo: it was using "Auto_submitted" (underscore instead of
4161 hyphen). Since every message generated by Exim is necessarily in response
4162 to another message, thes have all been changed to:
4164 Auto-Submitted: auto-replied
4166 in accordance with these statements in the RFC:
4168 The auto-replied keyword:
4170 - SHOULD be used on messages sent in direct response to another
4171 message by an automatic process,
4173 - MUST NOT be used on manually-generated messages,
4175 - MAY be used on Delivery Status Notifications (DSNs) and Message
4176 Disposition Notifications (MDNs),
4178 - MUST NOT be used on messages generated by automatic or periodic
4179 processes, except for messages which are automatic responses to
4182 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4183 to the default Received: header definition.
4185 PH/12 Added log selector acl_warn_skipped (default on).
4187 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4188 variables because (a) they are in the wrong storage pool and (b) even if
4189 they were copied, it wouldn't work properly because of the caching.
4191 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4192 checking when decoding. Apparently there are clients that generate
4193 overlong encoded strings. Why am I not surprised?
4195 PH/15 If the first argument of "${if match_address" was not empty, but did not
4196 contain an "@" character, Exim crashed. Now it writes a panic log message
4197 and treats the condition as false.
4199 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4201 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4202 extension "envelope-auth". The code is finished and in agreement with
4203 other implementations, but there is no documentation so far and in fact,
4204 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4205 not changing the active code.
4207 Print executed "if" and "elsif" statements when debugging is used. This
4208 helps a great deal to understand what a filter does.
4210 Document more things not specified clearly in RFC3028. I had all this
4211 sorted out, when out of a sudden new issues came to my mind. Oops."
4213 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4216 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4217 canonical form (as documented). However, after a host name lookup from
4218 the IP address, check_host() was doing a simple string comparison with
4219 addresses acquired from the DNS when checking that the found name did
4220 have the original IP as one of its addresses. Since any found IPv6
4221 addresses are likely to be in abbreviated form, the comparison could
4222 fail. Luckily, there already exists a function for doing the comparison
4223 by converting both addresses to binary, so now that is used instead of
4224 the text comparison.
4226 PH/20 There was another similar case to PH/19, when a complete host name was
4227 given in a host list; looking up its IP address could give an abbreviated
4228 form, whereas the current host's name might or might not be abbreviated.
4229 The same fix has been applied.
4235 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4236 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4239 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4240 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4242 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4244 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4245 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4246 Also, for "Auto-Submitted", treat anything other than "no" as
4247 non-personal, in accordance with RFC 3834. (Previously it treated
4248 anything starting "auto-" as non-personal.)
4250 TF/01 The control=submission/name=... option had a problem with syntax
4251 errors if the name included a slash character. The /name= option
4252 now slurps the rest of the string, so it can include any characters
4253 but it must come last in the list of options (after /sender_retain
4256 PH/05 Some modifications to the interface to the fake nameserver for the new
4264 TK/01 Added the "success_on_redirect" address verification option. See
4265 NewStuff for rationale and an example.
4267 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4269 PH/02 Patch to exigrep to allow it to work on syslog lines.
4271 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4272 fread() to skip over the body file's header line, because in Cygwin the
4273 header line is locked and is inaccessible.
4275 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4276 co-exist for some time) to make it clear that it is the Exim ID that is
4277 referenced, not the Message-ID: header line.
4279 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4280 string_format() function, because snprintf() does not exist on all
4283 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4284 ${stat: expansion item.
4286 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4287 protocol synchronization error", to keep the pedants happy.
4289 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4290 well as for IRIX systems, when gcc is being used. See the host.c source
4293 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4295 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4298 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4299 transport and to the smtp transport in LMTP mode.
4301 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4303 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4304 run a filter in a subprocess. This could lead to confusion in subsequent
4305 lookups in the parent process. There should also be a search_tidyup() at
4306 the end of the subprocess.
4308 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4309 only if the host matched helo_try_verify_hosts, which caused the
4310 verification to occur when the EHLO/HELO command was issued. The ACL just
4311 tested the remembered result. Now, if a previous verification attempt has
4312 not happened, "verify = helo" does it there and then.
4314 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4316 TK/03 Fix log output including CR from clamd.
4318 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4319 exist provoked a memory error which could cause a segfault.
4321 PH/15 Installed PCRE 6.2
4323 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4325 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4326 of the problem. Specifically, suggested +O2 rather than +O1 for the
4329 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4331 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4332 record, the port was not correctly logged when the outgoing_port log
4333 selector was set (it logged the transort's default port).
4335 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4336 fallback_hosts, and "hosts" in the smtp transport.
4338 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4339 host errors such as "Connection refused".
4341 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4342 authentication with radiusclient 0.4.9:
4344 - Error returned from rc_read_config was caught wrongly
4345 - Username/password not passed on to radius server due to wrong length.
4347 The presumption is that some radiusclient API changes for 4.51/PH/17
4348 were not taken care of correctly. The code is still untested by me (my
4349 Linux distribution still has 0.3.2 of radiusclient), but it was
4350 contributed by a Radius user.
4352 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4353 expanding the "port" option of the smtp transport.
4355 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4356 while reading a MIME header. Thanks to Tom Hughes for a patch.
4358 PH/24 Include config.h inside local_scan.h so that configuration settings are
4361 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4362 that in an ACL for RCPT (for example), you can examine exactly what was
4365 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4366 commands, but it was not correctly comparing the address with the actual
4367 client host address. Thus, it would show the EHLO address in Received:
4368 header lines when this was not necessary.
4370 PH/27 Added the % operator to ${eval:}.
4372 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4373 it should be ignoring failures (because with -C, for example, it has lost
4374 privilege). It wasn't ignoring creation failures other than "already
4377 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4380 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4381 because an input line was too long, either on its own, or by virtue of
4382 too many continuations, the temporary file was not being removed, and the
4383 return code was incorrect.
4385 PH/31 Missing "BOOL" in function definition in filtertest.c.
4387 PH/32 Applied Sieve patches from the maintainer.
4389 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4391 PH/33 Added "verify = not_blind".
4393 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4394 Local/Makefile (with some defaults set). These are used in built scripts
4395 such as exicyclog, but they have never been used in the exim_install
4396 script (though there are many overriding facilities there). I have
4397 arranged that the exim_install script now takes note of these two
4400 PH/35 Installed configuration files for Dragonfly.
4402 PH/36 When a locally submitted message by a trusted user did not contain a
4403 From: header, and the sender address was obtained from -f or from an SMTP
4404 MAIL command, and the trusted user did not use -F to supply a sender
4405 name, $originator_name was incorrectly used when constructing a From:
4406 header. Furthermore, $originator_name was used for submission mode
4407 messages from external hosts without From: headers in a similar way,
4408 which is clearly wrong.
4410 PH/37 Added control=suppress_local_fixups.
4412 PH/38 When log_selector = +received_sender was set, and the addition of the
4413 sender made the log line's construction buffer exactly full, or one byte
4414 less than full, an overflow happened when the terminating "\n" was
4417 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4418 when the result of a list match is failure because a DNS lookup failed.
4420 PH/40 RM_COMMAND is now used in the building process.
4422 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4423 the "build-* directories that it finds.
4425 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4426 address in a domain literal was a prefix of an interface address.
4428 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4429 when verifying a sender address, unless rewrite_headers is false.
4431 PH/44 Wrote a long comment about why errors_to addresses are verified as
4432 recipients, not senders.
4434 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4435 the ratelimit ACL was added.
4437 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4439 PH/46 Added extra information about PostgreSQL errors to the error string.
4441 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4442 avoiding the need to install special zones in a real server. This is
4443 backwards compatible; if it can't find the fake resolver, it drops back.
4444 Thus, both old and new test suites can be run.
4446 TF/02 Added util/ratelimit.pl
4448 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4449 clock is set back in time.
4451 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4452 Candler <B.Candler@pobox.com>.
4454 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4455 OK for addresses that are the result of redirections.
4457 PH/48 A number of further additions for the benefit of the new test suite,
4458 including a fake gethostbyname() that interfaces to the fake DNS resolver
4461 TF/06 The fix for widen_domains has also been applied to qualify_single and
4462 search_parents which are the other dnslookup options that can cause
4465 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4468 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4470 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4471 service" if it encountered an MX record with an empty target hostname.
4472 The message is now "an MX or SRV record indicated no SMTP service".
4474 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4475 if the DNS of the sending site is misconfigured. This is quite a
4476 common situation. This change restores the behaviour of treating a
4477 helo verification defer as a failure.
4479 PH/51 If self=fail was set on a router, the bounce message did not include the
4480 actual error message.
4486 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4488 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4489 command itself ended in error, the underlying message about the transport
4490 filter timeout was being overwritten with the pipe command error. Now the
4491 underlying error message should be appended to the second error message.
4493 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4495 PH/02 Reduce the amount of output that "make" produces by default. Full output
4496 can still be requested.
4498 PH/03 The warning log line about a condition test deferring for a "warn" verb
4499 was being output only once per connection, rather than after each
4500 occurrence (because it was using the same function as for successful
4501 "warn" verbs). This seems wrong, so I have changed it.
4503 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4504 it should not have, which might have caused a crash in the right
4505 circumstances, but probably never did.
4507 PH/04 Installed a modified version of Tony Finch's patch to make submission
4508 mode fix the return path as well as the Sender: header line, and to
4509 add a /name= option so that you can make the user's friendly name appear
4512 TF/03 Added the control = fakedefer ACL modifier.
4514 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4515 Mark Lowes for thorough testing.
4517 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4519 TK/03 Merged latest SRS patch from Miles Wilton.
4521 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4522 with the definition in sysexits.h (which is #included earlier).
4523 Fortunately, Exim does not actually use EX_OK. The code used to try to
4524 preserve the sysexits.h value, by assuming that macro definitions were
4525 scanned for macro replacements. I have been disabused of this notion,
4526 so now the code just undefines EX_OK before #including unistd.h.
4528 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4529 in the smtp transport. When a block could not be written in a single
4530 write() function, the timeout was being re-applied to each part-write.
4531 This seems wrong - if the receiver was accepting one byte at a time it
4532 would take for ever. The timeout is now adjusted when this happens. It
4533 doesn't have to be particularly precise.
4535 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4536 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4538 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4539 without a domain if the check to <postmaster@domain> fails.
4541 SC/01 Eximstats: added -xls and the ability to specify output files
4542 (patch written by Frank Heydlauf).
4544 SC/02 Eximstats: use FileHandles for outputting results.
4546 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4548 SC/04 Eximstats: fixed display of large numbers with -nvr option
4550 SC/05 Eximstats: fixed merging of reports with empty tables.
4552 SC/06 Eximstats: added the -include_original_destination flag
4554 SC/07 Eximstats: removed tabs and trailing whitespace.
4556 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4558 TK/06 MBOX spool code: Add real "From " MBOX separator line
4559 so the .eml file is really in mbox format (even though
4560 most programs do not really care). Patch from Alex Miller.
4562 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4563 The latter is generated from $received_to and is only set if the
4564 message has one envelope recipient. SA can use these headers,
4565 obviously out-of-the-box. Patch from Alex Miller.
4567 PH/08 The ${def test on a variable was returning false if the variable's
4568 value was "0", contrary to what the specification has always said!
4569 The result should be true unless the variable is empty.
4571 PH/09 The syntax error of a character other than { following "${if
4572 def:variable_name" (after optional whitespace) was not being diagnosed.
4573 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4574 accidental colon was present, for example, could give incorrect results.
4576 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4577 result is used (not including appendfile, where other changes are about
4580 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4581 This involved changing a lot of size variables from int to off_t. It
4582 should work with maildirs and everything.
4584 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4585 spamd dying while we are connected to it.
4587 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4590 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4591 function for BDB 4.3.
4593 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4595 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4596 the sources for PCRE have been re-arranged and more files are now
4599 PH/15 The code I had for printing potentially long long variables in PH/11
4600 above was not the best (it lost precision). The length of off_t variables
4601 is now inspected at build time, and an appropriate printing format (%ld
4602 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4603 to be "long long int" or "long int". This is needed for the internal
4604 formatting function string_vformat().
4606 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4607 the configuration file to be ":syslog", then the script "guesses" where
4608 the logs files are, rather than using the compiled in default. In our
4609 case the guess is not the same as the compiled default, so the script
4610 suddenly stopped working when I started to use syslog. The patch checks
4611 to see if log_file_path is "". If so, it attempts to read it from exim
4612 with no configuration file to get the compiled in version, before it
4613 falls back to the previous guessing code."
4615 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4616 implementing BATV in an Exim configuration. See NewStuff for the gory
4619 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4620 Makefile that are specific to HP-UX.
4622 PH/18 If the "use_postmaster" option was set for a recipient callout together
4623 with the "random" option, the postmaster address was used as the MAIL
4624 FROM address for the random test, but not for the subsequent recipient
4625 test. It is now used for both.
4627 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4628 patch removes a few documentation additions to RFC 3028, because the
4629 latest draft now contains them. It adds the new en;ascii-case comparator
4630 and a new error check for 8bit text in MIME parts. Comparator and
4631 require names are now matched exactly. I enabled the subaddress
4632 extension, but it is not well tested yet (read: it works for me)."
4634 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4635 rework some of the code of TK/09 above to avoid the hardwired use of
4636 "%lld" and "long long". Replaced the call to snprintf() with a call to
4639 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4640 records point to non-existent hosts", "retry timeout exceeded", and
4641 "retry time not reached for any host after a long failure period".
4643 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4644 experimental DomainKeys support:
4646 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4647 (2) On an error such as an illegally used "control", the wrong name for
4648 the control was given.
4650 These problems did NOT occur unless DomainKeys support was compiled.
4652 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4654 PH/24 Added ${if match_ip condition.
4656 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4657 databases so that it will be absolutely obvious if a crash occurs in the
4658 DB library. This is a regular occurrence (often caused by mis-matched
4661 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4662 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4663 picked up on a user's system that detects such things. There doesn't seem
4664 to be a gcc warning option for this - only an attribute that has to be
4665 put on the function's prototype. It seems that in Fedora Core 4 they have
4666 set this on a number of new functions. No doubt there will be more in due
4669 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4670 specify a transport. However, if an address that was verified by such a
4671 router was the subject of a callout, Exim crashed because it tried to
4672 read the rcpt_include_affixes from the non-existent transport. Now it
4673 just assumes that the setting of that option is false. This bug was
4674 introduced by 4.51/PH/31.
4676 PH/28 Changed -d+all to exclude +memory, because that information is very
4677 rarely of interest, but it makes the output a lot bigger. People tend to
4678 do -d+all out of habit.
4680 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4681 code in os-type was giving problems when libc.so lives in lib64, like on
4684 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4685 aren't the modern standard, and it seems that some systems' include files
4686 don't always have them. Exim was already checking for some of the newer
4687 ones like T_AAAA, and defining it itself. I've added checks for all the
4688 record types that Exim uses.
4690 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4691 not automatically generating a new one, as it is supposed to. This
4692 prevented TLS from working. If the file did exist, but contained invalid
4693 data, a new version was generated, as expected. It was only the case of a
4694 non-existent file that was broken.
4696 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4697 with a change in libdomainkeys > 0.64.
4699 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4700 from DNS. If the selector record carries the flag, it now has
4701 precedence over the domain-wide flag.
4703 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4705 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4706 the use of a port name that isn't defined in /etc/services) occurred, the
4707 message was deferred as in a normal delivery, and thus remained on the
4708 spool, instead of being failed because of the mua_wrapper setting. This
4709 is now fixed, and I tidied up some of the mua_wrapper messages at the
4712 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4713 the messages in a hash of arrays rather than using individual hashes.
4714 This is a bit cleaner and results in dramatic memory savings, albeit
4715 at a slight CPU cost.
4717 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4718 as requested by Marc Sherman.
4720 SC/10 Eximstats: added histograms for user specified patterns as requested
4723 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4725 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4726 fopen() in the content-scanning modules that did not already have it.
4732 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4733 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4735 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4737 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4739 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4740 to test Sieve filters that use "vacation".
4742 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4743 that changes the way the GnuTLS parameters are stored in the cache file.
4744 The new format can be generated externally. For backward compatibility,
4745 if the data in the cache doesn't make sense, Exim assumes it has read an
4746 old-format file, and it generates new data and writes a new file. This
4747 means that you can't go back to an older release without removing the
4750 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4751 work if there are any delivery delays because "one_time" forces the
4752 parent to be marked "delivered", so its unseen clone is never tried
4753 again. For this reason, Exim now forbids the simultaneous setting of
4756 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4757 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4758 entry if you want to know the details. The fix, however, neglected to
4759 consider the case when local delivery batching is involved. The test for
4760 "previously delivered" was not happening when checking to see if an
4761 address could be batched with a previous (undelivered) one; under
4762 certain circumstances this could lead to multiple deliveries to the same
4765 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4766 in its include files, and this causes problems building Exim.
4768 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4769 header_syntax) but Exim was just ignoring anything given after a slash.
4770 In particular, this caused confusion with an attempt to use "verify =
4771 reverse_host_lookup/defer_ok". An error is now given when options are
4772 supplied for verify items that do not have them. (Maybe reverse_host_
4773 lookup should have a defer_ok option, but that's a different point.)
4775 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4776 defined by RFC 821) to 2048, because there were problems with some AUTH
4777 commands, and RFC 1869 says the size should be increased for extended
4778 SMTP commands that take arguments.
4780 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4783 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4784 "unknown" error; now it says that the functionality isn't in the binary.
4786 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4787 an address' error message when a string expansion fails (syntax or
4788 whatever). Otherwise the password may appear in the log. Following change
4789 PH/42 below, there is no longer a chance of it appearing in a bounce
4792 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4794 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4795 of its addresses was ever tried. (Bugzilla bug #2.)
4797 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4798 the result incorrectly in the debug output. (It correctly added a newline
4799 to what was transported.)
4801 TF/01 Added $received_time.
4803 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4804 commented out examples of how to interface to a virus scanner and to
4805 SpamAssassin. Also added commented examples of av_scanner and
4806 spamd_address settings.
4808 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4809 and controls are allowed in which ACLs. There were a couple of minor
4810 errors. Some of the entries in the conditions table (which is a table of
4811 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4812 negation of where the condition IS allowed.
4814 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4816 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4817 header file does not have a version number, so I've had to invent a new
4818 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4819 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4820 radiusclient), but it was contributed by a Radius user.
4822 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4823 files or directories, for OpenSSL.
4825 PH/19 When an Exim process that is running as root has to create an Exim log
4826 file, it does so in a subprocess that runs as exim:exim so as to get the
4827 ownership right at creation (otherwise, other Exim processes might see
4828 the file with the wrong ownership). There was no test for failure of this
4829 fork() call, which would lead to the process getting stuck as it waited
4830 for a non-existent subprocess. Forks do occasionally fail when resources
4831 run out. I reviewed all the other calls to fork(); they all seem to check
4834 PH/20 When checking for unexpected SMTP input at connect time (before writing
4835 the banner), Exim was not dealing correctly with a non-positive return
4836 from the read() function. If the client had disconnected by this time,
4837 the result was a log entry for a synchronization error with an empty
4838 string after "input=" when read() returned zero. If read() returned -1
4839 (an event I could not check), uninitialized data bytes were printed.
4840 There were reports of junk text (parts of files, etc) appearing after
4843 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4845 PH/22 Added support for macro redefinition, and (re)definition in between
4846 driver and ACL definitions.
4848 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4849 forgetting to use the resulting value; it was using the unexpanded value.
4851 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4852 hadn't been configured. The fix is from Juergen Kreileder, who
4853 understands it better than I do:
4855 "Here's what I see happening with three configured cyrus_sasl
4856 authenticators configured (plain, login, cram-md5):
4858 On startup auth_cyrus_sasl_init() gets called for each of these.
4859 This means three calls to sasl_listmech() without a specified mech_list.
4860 => SASL tests which mechs of all available mechs actually work
4861 => three warnings about OTP not working
4862 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4864 With the patch, sasl_listmech() also gets called three times. But now
4865 SASL's mech_list option is set to the server_mech specified in the the
4866 authenticator. Or in other words, the answer from sasl_listmech()
4867 gets limited to just the mech you're testing for (which is different
4869 => the return list contains just 'plain' or 'login', 'cram-md5' or
4870 nothing depending on the value of ob->server_mech.
4872 I've just tested the patch: Authentication still works fine,
4873 unavailable mechs specified in the exim configuration are still
4874 caught, and the auth.log warnings about OTP are gone."
4876 PH/25 When debugging is enabled, the contents of the command line are added
4877 to the debugging output, even when log_selector=+arguments is not
4880 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4881 answer is "GNU", and only if the return is "GNU/something" is the answer
4884 PH/27 $acl_verify_message is now set immediately after the failure of a
4885 verification in an ACL, and so is available in subsequent modifiers. In
4886 particular, the message can be preserved by coding like this:
4888 warn !verify = sender
4889 set acl_m0 = $acl_verify_message
4891 Previously, $acl_verify_message was set only while expanding "message"
4892 and "log_message" when a very denied access.
4894 PH/28 Modified OS/os.c-Linux with
4896 -#ifndef OS_LOAD_AVERAGE
4897 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4899 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4900 nomenclature these days.)
4902 PH/29 Installed patch from the Sieve maintainer that adds the options
4903 sieve_useraddress and sieve_subaddress to the redirect router.
4905 PH/30 In these circumstances:
4906 . Two addresses routed to the same list of hosts;
4907 . First host does not offer TLS;
4908 . First host accepts first address;
4909 . First host gives temporary error to second address;
4910 . Second host offers TLS and a TLS session is established;
4911 . Second host accepts second address.
4912 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4913 and peerdn, if requested) that were in fact used only for the second
4916 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4917 attention to any local part prefix or suffix that was matched by the
4918 router that accepted the address. It now behaves in the same way as it
4919 does for delivery: the affixes are removed from the local part unless
4920 rcpt_include_affixes is set on the transport.
4922 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4923 timeout during the DATA phase of an incoming message.
4925 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4926 applied a patch sanctioned by the Sieve maintainer.
4928 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4929 the uid or gid is negative. A case of a negative gid caused this to be
4930 noticed. The fix allows for either to be negative.
4932 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4933 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4936 PH/36 The change PH/12 above was broken. Fixed it.
4938 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4939 the grounds that routing the same address twice would always produce the
4940 same answer. This might have been true once, but it is certainly no
4941 longer true now. Routing a child address may depend on the previous
4942 routing that produced that child. Some complicated redirection strategies
4943 went wrong when messages had multiple recipients, and made Exim's
4944 behaviour dependent on the order in which the addresses were given.
4946 I have moved the duplicate checking until after the routing is complete.
4947 Exim scans the addresses that are assigned to local and remote
4948 transports, and removes any duplicates. This means that more work will be
4949 done, as duplicates will always all be routed, but duplicates are
4950 presumably rare, so I don't expect this is of any significance.
4952 For deliveries to pipes, files, and autoreplies, the duplicate checking
4953 still happens during the routing process, since they are not going to be
4956 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4957 It corrects a timeout issue with spamd. This is Ian's comment: "The
4958 background is that sometimes spamd either never reads data from a
4959 connection it has accepted, or it never writes response data. The exiscan
4960 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4961 blindly assumes that writes won't block so it may never time out."
4963 PH/39 Allow G after quota size as well as K and M.
4965 PH/40 The value set for $authenticated_id in an authenticator may not contain
4966 binary zeroes or newlines because the value is written to log lines and
4967 to spool files. There was no check on this. Now the value is run through
4968 the string_printing() function so that such characters are converted to
4969 printable escape sequences.
4971 PH/41 $message_linecount is a new variable that contains the total number of
4972 lines in the message. Compare $body_linecount, which is the count for the
4975 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4976 bounce and delay warning messages, except in certain special cases, which
4979 (a) An SMTP error message from a remote host;
4980 (b) A message specified in a :fail: redirection;
4981 (c) A message specified in a "fail" command in a system filter;
4982 (d) A message specified in a FAIL return from the queryprogram router;
4983 (e) A message specified by the cannot_route_message router option.
4985 In these cases only, Exim does include the error details in bounce and
4986 warning messages. There are also a few cases where bland messages such
4987 as "unrouteable address" or "local delivery error" are given.
4989 PH/43 $value is now also set for the "else" part of a ${run expansion.
4991 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4992 being worked on, but at least Exim now implements the latest version to
4995 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4996 process to complete was treated as a delivery failure, a timeout while
4997 writing the message to the pipe was logged, but erroneously treated as a
4998 successful delivery. Such timeouts include transport filter timeouts. For
4999 consistency with the overall process timeout, these timeouts are now
5000 treated as errors, giving rise to delivery failures by default. However,
5001 there is now a new Boolean option for the pipe transport called
5002 timeout_defer, which, if set TRUE, converts the failures into defers for
5003 both kinds of timeout. A transport filter timeout is now identified in
5006 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5007 systems where "make" and "gmake" are different, calling "gmake" at top
5008 level broke things. I've arranged for the value of $(MAKE) to be passed
5009 from the Makefile to this script so that it can call the same version of
5013 A note about Exim versions 4.44 and 4.50
5014 ----------------------------------------
5016 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5017 changes of various kinds. As a consequence, a big documentation update was
5018 needed. This delayed the release for rather longer than seemed good, especially
5019 in the light of a couple of (minor) security issues. Therefore, the changes
5020 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5021 release. So 4.44 and 4.50 are in effect two different branches that both start
5024 I have left the 4.50 change log unchanged; it contains all the changes since
5025 4.43. The change log for 4.44 is below; many of its items are identical to
5026 those for 4.50. This seems to be the most sensible way to preserve the
5027 historical information.
5033 1. Minor wording change to the doc/README.SIEVE file.
5035 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5036 computation of the current number of files was incorrect.
5038 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5039 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5042 4. Give more explanation in the error message when the command for a transport
5043 filter fails to execute.
5045 5. There are several places where Exim runs a non-Exim command in a
5046 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5047 was being done only for the command run by the queryprogram router. It is
5048 now done for all such subprocesses. The other cases are: ${run, transport
5049 filters, and the commands run by the lmtp and pipe transports.
5051 6. Added CONFIGURE_GROUP build-time option.
5053 7. Some older OS have a limit of 256 on the maximum number of file
5054 descriptors. Exim was using setrlimit() to set 1000 as a large value
5055 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5056 systems. I've change it so that if it can't get 1000, it tries for 256.
5058 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5059 was an oversight, and furthermore, ever since the addition of extra
5060 controls (e.g. 4.43/32), the checks on when to allow different forms of
5061 "control" were broken. There should now be diagnostics for all cases when a
5062 control that does not make sense is encountered.
5064 9. Added the /retain_sender option to "control=submission".
5066 10. $recipients is now available in the predata ACL (oversight).
5068 11. Tidy the search cache before the fork to do a delivery from a message
5069 received from the command line. Otherwise the child will trigger a lookup
5070 failure and thereby defer the delivery if it tries to use (for example) a
5071 cached ldap connection that the parent has called unbind on.
5073 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5074 of $address_data from the recipient verification was clobbered by the
5075 sender verification.
5077 13. The value of address_data from a sender verification is now available in
5078 $sender_address_data in subsequent conditions in the ACL statement.
5080 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5082 15. Added a new option "connect=<time>" to callout options, to set a different
5085 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5086 was its contents. (It was OK if the option was not defined at all.)
5088 17. A "Completed" log line is now written for messages that are removed from
5089 the spool by the -Mrm option.
5091 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5092 information about exactly what failed.
5094 19. Added -dd to debug only the daemon process.
5096 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5097 handles timeouts, both on the server side and network timeouts. Renamed the
5098 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5100 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5101 It is now set to "smtps".
5103 22. $host_address is now set to the target address during the checking of
5104 ignore_target_hosts.
5106 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5107 being passed; this would have caused $sender_host_name to have been used if
5108 matching the list had actually called for a host name (not very likely,
5109 since this list is usually IP addresses). A host name is now passed as
5112 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5113 code that specifies a non-restarting handler (typically sigaction() in
5114 modern systems) in an attempt to fix a rare and obscure crash bug.
5116 25. Narrowed the window for a race in the daemon that could cause it to ignore
5117 SIGCHLD signals. This is not a major problem, because they are used only to
5118 wake it up if nothing else does.
5120 26. A malformed maildirsize file could cause Exim to calculate negative values
5121 for the mailbox size or file count. Odd effects could occur as a result.
5122 The maildirsize information is now recalculated if the size or filecount
5125 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5126 support for a long time. Removed HAVE_SYS_VFS_H.
5128 28. Installed the latest version of exipick from John Jetmore.
5130 29. In an address list, if the pattern was not a regular expression, an empty
5131 subject address (from a bounce message) matched only if the pattern was an
5132 empty string. Non-empty patterns were not even tested. This was the wrong
5133 because it is perfectly reasonable to use an empty address as part of a
5134 database query. An empty address is now tested by patterns that are
5135 lookups. However, all the other forms of pattern expect the subject to
5136 contain a local part and a domain, and therefore, for them, an empty
5137 address still always fails if the pattern is not itself empty.
5139 30. Exim went into a mad DNS loop when attempting to do a callout where the
5140 host was specified on an smtp transport, and looking it up yielded more
5141 than one IP address.
5143 31. Re-factored the code for checking spool and log partition space into a
5144 function that finds that data and another that does the check. The former
5145 is then used to implement four new variables: $spool_space, $log_space,
5146 $spool_inodes, and $log_inodes.
5148 32. The RFC2047 encoding function was originally intended for short strings
5149 such as real names; it was not keeping to the 75-character limit for
5150 encoded words that the RFC imposes. It now respects the limit, and
5151 generates multiple encoded words if necessary. To be on the safe side, I
5152 have increased the buffer size for the ${rfc2047: expansion operator from
5155 33. It is now permitted to omit both strings after an "if" condition; if the
5156 condition is true, the result is "true". As before, when the second string
5157 is omitted, a false condition yields an empty string. This makes it less
5158 cumbersome to write custom ACL and router conditions.
5160 34. Failure to deliver a bounce message always caused it to be frozen, even if
5161 there was an errors_to setting on the router. The errors_to setting is now
5164 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5165 canonical form (fully expanded) before being placed in
5166 $sender_host_address.
5168 36. The table in the code that translates DNS record types into text (T_A to
5169 "A" for instance) was missing entries for NS and CNAME. It is just possible
5170 that this could have caused confusion if both these types were looked up
5171 for the same domain, because the text type is used as part of Exim's
5172 per-process caching. But the chance of anyone hitting this buglet seems
5175 37. The dnsdb lookup has been extended in a number of ways.
5177 (1) There is a new type, "zns", which walks up the domain tree until it
5178 finds some nameserver records. It should be used with care.
5180 (2) There is a new type, "mxh", which is like "mx" except that it returns
5181 just the host names, not the priorities.
5183 (3) It is now possible to give a list of domains (or IP addresses) to be
5184 looked up. The behaviour when one of the lookups defers can be
5185 controlled by a keyword.
5187 (4) It is now possible to specify the separator character for use when
5188 multiple records are returned.
5190 38. The dnslists ACL condition has been extended: it is now possible to supply
5191 a list of IP addresses and/or domains to be looked up in a particular DNS
5194 39. Added log_selector=+queue_time_overall.
5196 40. When running the queue in the test harness, wait just a tad after forking a
5197 delivery process, to get repeatability of debugging output.
5199 41. Include certificate and key file names in error message when GnuTLS fails
5200 to set them up, because the GnuTLS error message doesn't include the name
5201 of the failing file when there is a problem reading it.
5203 42. Allow both -bf and -bF in the same test run.
5205 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5207 44. The "Exiscan patch" is now merged into the mainline Exim source.
5209 45. Sometimes the final signoff response after QUIT could fail to get
5210 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5211 < 0 before doing a fflush(). This bug looks as though it goes back to the
5212 introduction of TLS in release 3.20, but "sometimes" must have been rare
5213 because the tests only now provoked it.
5215 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5216 (this can affect the format of dates).
5218 47. exim_tidydb, when checking for the continued existence of a message for
5219 which it has found a message-specific retry record, was not finding
5220 messages that were in split spool directories. Consequently, it was
5221 deleting retry records that should have stayed in existence.
5223 48. Steve fixed some bugs in eximstats.
5225 49. The SPA authentication driver was not abandoning authentication and moving
5226 on to the next authenticator when an expansion was forced to fail,
5227 contradicting the general specification for all authenticators. Instead it
5228 was generating a temporary error. It now behaves as specified.
5230 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5231 (the order specifies the preference for clients). The order is now AES256,
5232 AES128, 3DES, ARCFOUR128.
5234 51. Small patch to Sieve code - explicitly set From: when generating an
5237 52. Exim crashed if a remote delivery caused a very long error message to be
5238 recorded - for instance if somebody sent an entire SpamAssassin report back
5239 as a large number of 550 error lines. This bug was coincidentally fixed by
5240 increasing the size of one of Exim's internal buffers (big_buffer) that
5241 happened as part of the Exiscan merge. However, to be on the safe side, I
5242 have made the code more robust (and fixed the comments that describe what
5245 53. Now that there can be additional text after "Completed" in log lines (if
5246 the queue_time_overall log selector is set), a one-byte patch to exigrep
5247 was needed to allow it to recognize "Completed" as not the last thing in
5250 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5251 patch that reportedly fixes this has been added. I am not expert enough to
5252 create a test for it. This is what the patch creator wrote:
5254 "I found a little strange behaviour of ldap code when working with
5255 Windows 2003 AD Domain, where users was placed in more than one
5256 Organization Units. When I tried to give exim partial DN, the exit code
5257 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5258 But simultaneously result of request was absolutely normal ldap result,
5259 so I produce this patch..."
5261 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5262 REFERENCE, so I have modified the code to exclude the patch when that macro
5265 55. Some experimental protocols are using DNS PTR records for new purposes. The
5266 keys for these records are domain names, not reversed IP addresses. The
5267 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5268 leaves it alone. Component reversal etc. now happens only for IP addresses.
5271 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5273 57. Double the size of the debug message buffer (to 2048) so that more of very
5274 long debug lines gets shown.
5276 58. The exicyclog utility now does better if the number of log files to keep
5277 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5279 59. Two changes related to the smtp_active_hostname option:
5281 (1) $smtp_active_hostname is now available as a variable.
5282 (2) The default for smtp_banner uses $smtp_active_hostname instead
5283 of $primary_hostname.
5285 60. The host_aton() function is supposed to be passed a string that is known
5286 to be a valid IP address. However, in the case of IPv6 addresses, it was
5287 not checking this. This is a hostage to fortune. Exim now panics and dies
5288 if the condition is not met. A case was found where this could be provoked
5289 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5290 components; fortuitously, this particular loophole had already been fixed
5291 by change 4.50/55 above.
5293 If there are any other similar loopholes, the new check in host_aton()
5294 itself should stop them being exploited. The report I received stated that
5295 data on the command line could provoke the exploit when Exim was running as
5296 exim, but did not say which command line option was involved. All I could
5297 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5298 running as the user.
5301 61. There was a buffer overflow vulnerability in the SPA authentication code
5302 (which came originally from the Samba project). I have added a test to the
5303 spa_base64_to_bits() function which I hope fixes it.
5306 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5307 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5309 63. The daemon start-up calls getloadavg() while still root for those OS that
5310 need the first call to be done as root, but it missed one case: when
5311 deliver_queue_load_max is set with deliver_drop_privilege. This is
5312 necessary for the benefit of the queue runner, because there is no re-exec
5313 when deliver_drop_privilege is set.
5315 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5316 This has been fixed.
5318 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5319 was in use, was not putting the data itself into the right store pool;
5320 consequently, it could be overwritten for a subsequent message in the same
5321 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5324 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5326 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5327 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5328 the function were treating the return as a boolean value, which happened to
5329 work because 0=false and not-0=true, but is not correct code.
5331 68. The host_aton() function was not handling scoped IPv6 addresses (those
5332 with, for example, "%eth0" on the end) correctly.
5334 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5335 negated items (that is, ~something) in unsigned ints. Some compilers
5336 apparently mutter when there is no cast.
5338 70. If an address verification called from an ACL failed, and did not produce a
5339 user-specific message (i.e. there was only a "system" message), nothing was
5340 put in $acl_verify_message. In this situation, it now puts the system
5343 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5344 session; change 4.31/43 added the unwanted input to the log line - except
5345 that it did not do this in the start of session case. It now does.
5347 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5348 This is wrong and can cause the other end to generate a synchronization
5349 error if it is another Exim or anything else that does the synchronization
5350 check. A QUIT command is no longer sent after a timeout.
5352 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5353 during host lookups.
5355 74. The defer_ok option of callout verification was not working if it was used
5356 when verifying addresses in header lines, that is, for this case:
5358 verify = header_sender/callout=defer_ok
5360 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5361 those file descriptors could be used for SMTP connections. If anything
5362 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5363 could be sent to the SMTP client, causing chaos. The daemon now opens
5364 stdin, stdout, and stderr to /dev/null when it puts itself into the
5367 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5368 log by default. The user can override this with suitable Perl magic.
5370 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5371 the log message when discard triggers, was not working for the DATA ACL or
5372 for the non-SMTP ACL.
5374 78. Error message wording change in sieve.c.
5376 79. If smtp_accept_max_per_host was set, the number of connections could be
5377 restricted to fewer than expected, because the daemon was trying to set up
5378 a new connection before checking whether the processes handling previous
5379 connections had finished. The check for completed processes is now done
5380 earlier. On busy systems, this bug wouldn't be noticed because something
5381 else would have woken the daemon, and it would have reaped the completed
5384 80. If a message was submitted locally by a user whose login name contained one
5385 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5386 It caused a spool format error. I have fixed the spool reading code. A
5387 related problem was that the "from" clause in the Received: line became
5388 illegal because of the space(s). It is now covered by ${quote_local_part.
5390 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5393 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5395 83. Patch from Sieve maintainer to fix unterminated string problem in
5396 "vacation" handling.
5398 84. Some minor changes to the Linux configuration files to help with other
5399 OS variants using glibc.
5401 85. One more patch for Sieve to update vacation handling to latest spec.
5404 ----------------------------------------------------
5405 See the note above about the 4.44 and 4.50 releases.
5406 ----------------------------------------------------
5412 1. Change 4.43/35 introduced a bug that caused file counts to be
5413 incorrectly computed when quota_filecount was set in an appendfile
5416 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5417 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5420 3. Give more explanation in the error message when the command for a transport
5421 filter fails to execute.
5423 4. There are several places where Exim runs a non-Exim command in a
5424 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5425 was being done only for the command run by the queryprogram router. It is
5426 now done for all such subprocesses. The other cases are: ${run, transport
5427 filters, and the commands run by the lmtp and pipe transports.
5429 5. Some older OS have a limit of 256 on the maximum number of file
5430 descriptors. Exim was using setrlimit() to set 1000 as a large value
5431 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5432 systems. I've change it so that if it can't get 1000, it tries for 256.
5434 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5435 was an oversight, and furthermore, ever since the addition of extra
5436 controls (e.g. 4.43/32), the checks on when to allow different forms of
5437 "control" were broken. There should now be diagnostics for all cases when a
5438 control that does not make sense is encountered.
5440 7. $recipients is now available in the predata ACL (oversight).
5442 8. Tidy the search cache before the fork to do a delivery from a message
5443 received from the command line. Otherwise the child will trigger a lookup
5444 failure and thereby defer the delivery if it tries to use (for example) a
5445 cached ldap connection that the parent has called unbind on.
5447 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5448 of $address_data from the recipient verification was clobbered by the
5449 sender verification.
5451 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5452 was its contents. (It was OK if the option was not defined at all.)
5454 11. A "Completed" log line is now written for messages that are removed from
5455 the spool by the -Mrm option.
5457 12. $host_address is now set to the target address during the checking of
5458 ignore_target_hosts.
5460 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5461 being passed; this would have caused $sender_host_name to have been used if
5462 matching the list had actually called for a host name (not very likely,
5463 since this list is usually IP addresses). A host name is now passed as
5466 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5467 code that specifies a non-restarting handler (typically sigaction() in
5468 modern systems) in an attempt to fix a rare and obscure crash bug.
5470 15. Narrowed the window for a race in the daemon that could cause it to ignore
5471 SIGCHLD signals. This is not a major problem, because they are used only to
5472 wake it up if nothing else does.
5474 16. A malformed maildirsize file could cause Exim to calculate negative values
5475 for the mailbox size or file count. Odd effects could occur as a result.
5476 The maildirsize information is now recalculated if the size or filecount
5479 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5480 support for a long time. Removed HAVE_SYS_VFS_H.
5482 18. Updated exipick to current release from John Jetmore.
5484 19. Allow an empty sender to be matched against a lookup in an address list.
5485 Previously the only cases considered were a regular expression, or an
5488 20. Exim went into a mad DNS lookup loop when doing a callout where the
5489 host was specified on the transport, if the DNS lookup yielded more than
5492 21. The RFC2047 encoding function was originally intended for short strings
5493 such as real names; it was not keeping to the 75-character limit for
5494 encoded words that the RFC imposes. It now respects the limit, and
5495 generates multiple encoded words if necessary. To be on the safe side, I
5496 have increased the buffer size for the ${rfc2047: expansion operator from
5499 22. Failure to deliver a bounce message always caused it to be frozen, even if
5500 there was an errors_to setting on the router. The errors_to setting is now
5503 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5504 canonical form (fully expanded) before being placed in
5505 $sender_host_address.
5507 24. Updated eximstats to version 1.33
5509 25. Include certificate and key file names in error message when GnuTLS fails
5510 to set them up, because the GnuTLS error message doesn't include the name
5511 of the failing file when there is a problem reading it.
5513 26. Expand error message when OpenSSL has problems setting up cert/key files.
5516 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5517 (this can affect the format of dates).
5519 28. exim_tidydb, when checking for the continued existence of a message for
5520 which it has found a message-specific retry record, was not finding
5521 messages that were in split spool directories. Consequently, it was
5522 deleting retry records that should have stayed in existence.
5524 29. eximstats updated to version 1.35
5525 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5526 1.35 - bugfix such that pie charts by volume are generated correctly
5528 30. The SPA authentication driver was not abandoning authentication and moving
5529 on to the next authenticator when an expansion was forced to fail,
5530 contradicting the general specification for all authenticators. Instead it
5531 was generating a temporary error. It now behaves as specified.
5533 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5534 (the order specifies the preference for clients). The order is now AES256,
5535 AES128, 3DES, ARCFOUR128.
5537 31. Small patch to Sieve code - explicitly set From: when generating an
5540 32. Exim crashed if a remote delivery caused a very long error message to be
5541 recorded - for instance if somebody sent an entire SpamAssassin report back
5542 as a large number of 550 error lines. This bug was coincidentally fixed by
5543 increasing the size of one of Exim's internal buffers (big_buffer) that
5544 happened as part of the Exiscan merge. However, to be on the safe side, I
5545 have made the code more robust (and fixed the comments that describe what
5548 33. Some experimental protocols are using DNS PTR records for new purposes. The
5549 keys for these records are domain names, not reversed IP addresses. The
5550 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5551 leaves it alone. Component reversal etc. now happens only for IP addresses.
5554 34. The host_aton() function is supposed to be passed a string that is known
5555 to be a valid IP address. However, in the case of IPv6 addresses, it was
5556 not checking this. This is a hostage to fortune. Exim now panics and dies
5557 if the condition is not met. A case was found where this could be provoked
5558 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5559 components; fortuitously, this particular loophole had already been fixed
5560 by change 4.50/55 or 4.44/33 above.
5562 If there are any other similar loopholes, the new check in host_aton()
5563 itself should stop them being exploited. The report I received stated that
5564 data on the command line could provoke the exploit when Exim was running as
5565 exim, but did not say which command line option was involved. All I could
5566 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5567 running as the user.
5570 35. There was a buffer overflow vulnerability in the SPA authentication code
5571 (which came originally from the Samba project). I have added a test to the
5572 spa_base64_to_bits() function which I hope fixes it.
5575 36. The daemon start-up calls getloadavg() while still root for those OS that
5576 need the first call to be done as root, but it missed one case: when
5577 deliver_queue_load_max is set with deliver_drop_privilege. This is
5578 necessary for the benefit of the queue runner, because there is no re-exec
5579 when deliver_drop_privilege is set.
5581 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5582 was in use, was not putting the data itself into the right store pool;
5583 consequently, it could be overwritten for a subsequent message in the same
5584 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5587 38. Sometimes the final signoff response after QUIT could fail to get
5588 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5589 < 0 before doing a fflush(). This bug looks as though it goes back to the
5590 introduction of TLS in release 3.20, but "sometimes" must have been rare
5591 because the tests only now provoked it.
5597 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5598 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5599 Now it returns an integer. A number of calls were still expecting a T/F
5600 return. Fortuitously, in all cases, the tests worked in OK situations,
5601 which is the norm. However, things would have gone wrong on any write
5602 failures on the smtp file descriptor. This function is used when sending
5603 messages over SMTP and also when doing verify callouts.
5605 2. When Exim is called to do synchronous delivery of a locally submitted
5606 message (the -odf or -odi options), it no longer closes stderr before doing
5609 3. Implemented the mua_wrapper option.
5611 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5613 5. Implemented the functions header_remove(), header_testname(),
5614 header_add_at_position(), and receive_remove_recipient(), and exported them
5617 6. If an ACL "warn" statement specified the addition of headers, Exim already
5618 inserted X-ACL-Warn: at the start if there was no header name. However, it
5619 was not making this test for the second and subsequent header lines if
5620 there were newlines in the string. This meant that an invalid header could
5621 be inserted if Exim was badly configured.
5623 7. Allow an ACL "warn" statement to add header lines at the start or after all
5624 the Received: headers, as well as at the end.
5626 8. Added the rcpt_4xx retry error code.
5628 9. Added postmaster_mailfrom=xxx to callout verification option.
5630 10. Added mailfrom=xxxx to the callout verification option, for verify=
5633 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5634 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5636 12. Inserted some casts to stop certain compilers warning when using pointer
5637 differences as field lengths or precisions in printf-type calls (mostly
5638 affecting debugging statements).
5640 13. Added optional readline() support for -be (dynamically loaded).
5642 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5643 same clock tick as a message's arrival, so that its received time was the
5644 same as the "first fail" time on the retry record, and that message
5645 remained on the queue past the ultimate address timeout, every queue runner
5646 would try a delivery (because it was past the ultimate address timeout) but
5647 after another failure, the ultimate address timeout, which should have then
5648 bounced the address, did not kick in. This was a "< instead of <=" error;
5649 in most cases the first failure would have been in the next clock tick
5650 after the received time, and all would be well.
5652 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5653 being recognized when the domain list was tested by the match_domain
5654 condition in an expansion string.
5656 16. Added the ${str2b64: operator.
5658 17. Exim was always calling setrlimit() to set a large limit for the number of
5659 processes, without checking whether the existing limit was already
5660 adequate. (It did check for the limit on file descriptors.) Furthermore,
5661 errors from getrlimit() and setrlimit() were being ignored. Now they are
5662 logged to the main and panic logs, but Exim does carry on, to try to do its
5663 job under whatever limits there are.
5665 18. Imported PCRE 5.0.
5667 19. Trivial typo in log message " temporarily refused connection" (the leading
5670 20. If the log selector return_path_on_delivery was set and an address was
5671 redirected to /dev/null, the delivery process crashed because it assumed
5672 that a return path would always be set for a "successful" delivery. In this
5673 case, the whole delivery is bypassed as an optimization, and therefore no
5676 21. Internal re-arrangement: the function for sending a challenge and reading
5677 a response while authentication was assuming a zero-terminated challenge
5678 string. It's now changed to take a pointer and a length, to allow for
5679 binary data in such strings.
5681 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5683 23. Exim was not respecting finduser_retries when seeking the login of the
5684 uid under which it was called; it was always trying 10 times. (The default
5685 setting of finduser_retries is zero.) Also, it was sleeping after the final
5686 failure, which is pointless.
5688 24. Implemented tls_on_connect_ports.
5690 25. Implemented acl_smtp_predata.
5692 26. If the domain in control=submission is set empty, Exim assumes that the
5693 authenticated id is a complete email address when it generates From: or
5694 Sender: header lines.
5696 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5697 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5698 chown and chgrp in /bin and hostname in /usr/bin.
5700 28. Exim was keeping the "process log" file open after each use, just as it
5701 does for the main log. This opens the possibility of it remaining open for
5702 long periods when the USR1 signal hits a daemon. Occasional processlog
5703 errors were reported, that could have been caused by this. Anyway, it seems
5704 much more sensible not to leave this file open at all, so that is what now
5707 29. The long-running daemon process does not normally write to the log once it
5708 has entered its main loop, and it closes the log before doing so. This is
5709 so that log files can straightforwardly be renamed and moved. However,
5710 there are a couple of unusual error situations where the daemon does write
5711 log entries, and I had neglected to close the log afterwards.
5713 30. The text of an SMTP error response that was received during a remote
5714 delivery was being truncated at 512 bytes. This is too short for some of
5715 the long messages that one sometimes sees. I've increased the limit to
5718 31. It is now possible to make retry rules that apply only when a message has a
5719 specific sender, in particular, an empty sender.
5721 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5722 it possible to be selective about when SMTP synchronization is enforced.
5724 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5726 32. Implemented hosts_connection_nolog.
5728 33. Added an ACL for QUIT.
5730 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5733 35. Added mailbox_size and mailbox_filecount to appendfile.
5735 36. Added control = no_multiline_responses to ACLs.
5737 37. There was a bug in the logic of the code that waits for the clock to tick
5738 in the case where the clock went backwards by a substantial amount such
5739 that the microsecond fraction of "now" was more than the microsecond
5740 fraction of "then" (but the whole seconds number was less).
5742 38. Added support for the libradius Radius client library this is found on
5743 FreeBSD (previously only the radiusclient library was supported).
5749 1. When certain lookups returned multiple values in the form name=value, the
5750 quoting of the values was not always being done properly. Specifically:
5751 (a) If the value started with a double quote, but contained no whitespace,
5753 (b) If the value contained whitespace other than a space character (i.e.
5754 tabs or newlines or carriage returns) it was not quoted.
5755 This fix has been applied to the mysql and pgsql lookups by writing a
5756 separate quoting function and calling it from the lookup code. The fix
5757 should probably also be applied to nisplus, ibase and oracle lookups, but
5758 since I cannot test any of those, I have not disturbed their existing code.
5760 2. A hit in the callout cache for a specific address caused a log line with no
5761 reason for rejecting RCPT. Now it says "Previous (cached) callout
5762 verification failure".
5764 3. There was an off-by-one bug in the queryprogram router. An over-long
5765 return line was truncated at 256 instead of 255 characters, thereby
5766 overflowing its buffer with the terminating zero. As well as fixing this, I
5767 have increased the buffer size to 1024 (and made a note to document this).
5769 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5770 when Exim is waiting for an SMTP response from a remote server, Exim
5771 restarts its select() call on the socket, thereby resetting its timeout.
5772 This is not a problem when such interrupts are rare. Somebody set up a cron
5773 job to run exiwhat every 2 minutes, which is less than the normal select()
5774 timeout (5 or 10 minutes). This meant that the select() timeout never
5775 kicked in because it was always reset. I have fixed this by comparing the
5776 time when an interrupt arrives with the time at the start of the first call
5777 to select(). If more time than the timeout has elapsed, the interrupt is
5778 treated as a timeout.
5780 5. Some internal re-factoring in preparation for the addition of Sieve
5781 extensions (by MH). In particular, the "personal" test is moved to a
5782 separate function, and given an option for scanning Cc: and Bcc: (which is
5783 not set for Exim filters).
5785 6. When Exim created an email address using the login of the caller as the
5786 local part (e.g. when creating a From: or Sender: header line), it was not
5787 quoting the local part when it contained special characters such as @.
5789 7. Installed new OpenBSD configuration files.
5791 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5792 try to make them clearer.
5794 9. Callout options, other than the timeout value, were being ignored when
5795 verifying sender addresses in header lines. For example, when using
5797 verify = header_sender/callout=no_cache
5799 the cache was (incorrectly) being used.
5801 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5802 only the Cygwin environment.
5804 11. When return_path_on_delivery was set as a log selector, if different remote
5805 addresses in the same message used different return paths and parallel
5806 remote delivery occurred, the wrong values would sometimes be logged.
5807 (Whenever a remote delivery process finished, the return path value from
5808 the most recently started remote delivery process was logged.)
5810 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5811 lines when AUTH and/or TLS are in use. This is the "received protocol"
5812 field. Exim used to use "asmtp" for authenticated SMTP, without any
5813 indication (in the protocol name) for TLS use. Now it follows the RFC and
5814 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5815 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5816 names appear in log lines as well as in Received: header lines.
5818 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5819 extensions, and comparison tests, and to fix some bugs.
5821 14. Changes to the "personal" filter test:
5823 (1) The test was buggy in that it was just doing the equivalent of
5824 "contains" tests on header lines. For example, if a user's address was
5825 anne@some.where, the "personal" test would incorrectly be true for
5827 To: susanne@some.where
5829 This test is now done by extracting each address from the header in turn,
5830 and checking the entire address. Other tests that are part of "personal"
5831 are now done using regular expressions (for example, to check local parts
5832 of addresses in From: header lines).
5834 (2) The list of non-personal local parts in From: addresses has been
5835 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5836 taken from the Sieve specification recommendations.
5838 (3) If the message contains any header line starting with "List-" it is
5839 treated as non-personal.
5841 (4) The test for "circular" in the Subject: header line has been removed
5842 because it now seems ill-conceived.
5844 15. Minor typos in src/EDITME comments corrected.
5846 16. Installed latest exipick from John Jetmore.
5848 17. If headers_add on a router specified a text string that was too long for
5849 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5850 of string_sprintf() is now avoided.
5852 18. $message_body_size was not set (it was always zero) when running the DATA
5853 ACL and the local_scan() function.
5855 19. For the "mail" command in an Exim filter, no default was being set for
5856 the once_repeat time, causing a random time value to be used if "once" was
5857 specified. (If the value happened to be <= 0, no repeat happened.) The
5858 default is now 0s, meaning "never repeat". The "vacation" command was OK
5859 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5860 (I found it when inspecting the code).
5862 20. There is now an overall timeout for performing a callout verification. It
5863 defaults to 4 times the callout timeout, which applies to individual SMTP
5864 commands during the callout. The overall timeout applies when there is more
5865 than one host that can be tried. The timeout is checked before trying the
5866 next host. This prevents very long delays if there are a large number of
5867 hosts and all are timing out (e.g. when the network connections are timing
5868 out). The value of the overall timeout can be changed by specifying an
5869 additional sub-option for "callout", called "maxwait". For example:
5871 verify = sender/callout=5s,maxwait=20s
5873 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5874 to the end before writing, but this should make it even safer).
5876 22. Exim was forgetting that it had advertised PIPELINING for the second and
5877 subsequent messages on an SMTP connection. It was also not resetting its
5878 memory on STARTTLS and an internal HELO.
5880 23. When Exim logs an SMTP synchronization error within a session, it now
5881 records whether PIPELINING has been advertised or not.
5883 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5884 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5885 rather than long int.
5887 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5889 26. Added the never_mail option to autoreply.
5895 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5896 crash if the getsockname() call failed; this can happen if a connection is
5897 closed very soon after it is established. The problem was simply in the
5898 order in which certain operations were done, causing Exim to try to write
5899 to the SMTP stream before it had set up the file descriptor. The bug has
5900 been fixed by making things happen in the correct order.
5906 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5907 before the connection was closed, thus losing the rejection response.
5909 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5910 some early Solaris releases, but causes trouble in current releases where
5911 socklen_t is defined.
5913 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5916 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5919 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5920 that releasing the top of it at the end releases what was used for sub-
5921 expansions (unless the block got too big). However, discard this block if
5922 the first thing is a variable or header, so that we can use its block when
5923 it is dynamic (useful for very large $message_headers, for example).
5925 6. Lookups now cache *every* query, not just the most recent. A new, separate
5926 store pool is used for this. It can be recovered when all lookup caches are
5927 flushed. Lookups now release memory at the end of their result strings.
5928 This has involved some general refactoring of the lookup sources.
5930 7. Some code has been added to the store_xxx() functions to reduce the amount
5931 of flapping under certain conditions.
5933 8. log_incoming_interface used to affect only the <= reception log lines. Now
5934 it causes the local interface and port to be added to several more SMTP log
5935 lines, for example "SMTP connection from", and rejection lines.
5937 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5939 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5941 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5942 could be overwritten at the end of the current message (or the start of a
5943 new message if it was set in a HELO ACL). The value is now preserved for
5944 the duration of the SMTP connection.
5946 12. If a transport had a headers_rewrite setting, and a matching header line
5947 contained an unqualified address, that address was qualified, even if it
5948 did not match any rewriting rules. The underlying bug was that the values
5949 of the flags that permit the existence of unqualified sender and recipient
5950 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5951 non-local messages, and by -bnq for local messages) were not being
5952 preserved with the message after it was received.
5954 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5955 "next input=" as part of the text comprising the host identity instead of
5956 the correct text. The code was using the same buffer for two different
5957 strings. However, depending on which order the printing function evaluated
5958 its arguments, the bug did not always show up. Under Linux, for example, my
5959 test suite worked just fine.
5961 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5962 doesn't work with some older versions of Perl. It has been changed to "my",
5963 which in any case is probably the better facility to use.
5965 15. A really picky compiler found some instances of statements for creating
5966 error messages that either had too many or two few arguments for the format
5969 16. The size of the buffer for calls to the DNS resolver has been increased
5970 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5971 for addresses that have a lot of PTR records. This alleviates a problem; it
5972 does not fully solve it.
5974 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5975 buffer now truncates the list and logs the incident, which is the same
5976 action as happens when Exim is looking up a host name and its aliases.
5977 Previously in this situation something unpredictable would happen;
5978 sometimes it was "internal error: store_reset failed".
5980 18. If a server dropped the connection unexpectedly when an Exim client was
5981 using GnuTLS and trying to read a response, the client delivery process
5982 crashed while trying to generate an error log message.
5984 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5985 string, for example:
5987 warn message = H1: something\nH2: something
5989 the text was added as a single header line from Exim's point of view
5990 though it ended up OK in the delivered message. However, searching for the
5991 second and subsequent header lines using $h_h2: did not work. This has been
5992 fixed. Similarly, if a system filter added multiple headers in this way,
5993 the routers could not see them.
5995 20. Expanded the error message when iplsearch is called with an invalid key to
5996 suggest using net-iplsearch in a host list.
5998 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5999 ACLs are no longer actually imposed (and a message to that effect is
6002 22. If a "gecos" field in a passwd entry contained escaped characters, in
6003 particular, if it contained a \" sequence, Exim got it wrong when building
6004 a From: or a Sender: header from that name. A second bug also caused
6005 incorrect handling when an unquoted " was present following a character
6006 that needed quoting.
6008 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6009 was not being matched caselessly.
6011 24. Arranged for all hyphens in the exim.8 source to be escaped with
6014 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6015 properly. Recipient callout cache records were still being keyed to include
6016 the sender, even when use_sender was set false. This led to far more
6017 callouts that were necessary. The sender is no longer included in the key
6018 when use_sender is false.
6020 26. Added "control = submission" modifier to ACLs.
6022 27. Added the ${base62d: operator to decode base 62 numbers.
6024 28. dnsdb lookups can now access SRV records.
6026 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6027 the configuration file.
6029 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6030 (-v) mode. This makes the output for a verbose queue run more intelligible.
6032 31. Added a use_postmaster feature to recipient callouts.
6034 32. Added the $body_zerocount variable, containing the number of binary zero
6035 bytes in the message body.
6037 33. The time of last modification of the "new" subdirectory is now used as the
6038 "mailbox time last read" when there is a quota error for a maildir
6041 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6043 35. Added +ignore_unknown as a special item in host lists.
6045 36. Code for decoding IPv6 addresses in host lists is now included, even if
6046 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6047 address was recognized as an IP address, but was then not correctly decoded
6048 into binary, causing unexpected and incorrect effects when compared with
6055 1. Very minor rewording of debugging text in manualroute to say "list of
6056 hosts" instead of "hostlist".
6058 2. If verify=header_syntax was set, and a header line with an unqualified
6059 address (no domain) and a large number of spaces between the end of the
6060 name and the colon was received, the reception process suffered a buffer
6061 overflow, and (when I tested it) crashed. This was caused by some obsolete
6062 code that should have been removed. The fix is to remove it!
6064 3. When running in the test harness, delay a bit after writing a bounce
6065 message to get a bit more predictability in the log output.
6067 4. Added a call to search_tidyup() just before forking a reception process. In
6068 theory, someone could use a lookup in the expansion of smtp_accept_max_
6069 per_host which, without the tidyup, could leave open a database connection.
6071 5. Added the variables $recipient_data and $sender_data which get set from a
6072 lookup success in an ACL "recipients" or "senders" condition, or a router
6073 "senders" option, similar to $domain_data and $local_part_data.
6075 6. Moved the writing of debug_print from before to after the "senders" test
6078 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6079 problems for message scanning, either using a data ACL, or using
6080 local_scan() because the Received: header was not generated till after they
6081 were called (in order to set the time as the time of reception completion).
6082 I have revised the way this works. The header is now generated after the
6083 body is received, but before the ACL or local_scan() are called. After they
6084 are run, the timestamp in the header is updated.
6090 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6091 before starting a queue runner without re-exec. This happened only when
6092 deliver_drop_privilege was set or when the Exim user was set to root. The
6093 effect of the bug was that timeouts during subsequent deliveries caused
6094 crashes instead of being properly handled. The handler is now left at its
6095 default (and expected) setting.
6097 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6098 message, again when deliver_drop_privilege is set or Exim is run as root.
6099 The bug described in (1) was not present in this case, but the tidying up
6100 of the other signals was missing. I have made the two cases consistent.
6102 3. The ignore_target_hosts setting on a manualroute router was being ignored
6103 for hosts that were looked up using the /MX notation.
6105 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6108 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6109 operated on the sender address. After changing the $sender_address to <>
6110 for the sender address verify, Exim was re-instated it as the original
6111 (before rewriting) address, but remembering that it had rewritten it, so it
6112 wasn't rewriting it again. This bug also had the effect of breaking the
6113 sender address verification caching when the sender address was rewritten.
6115 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6116 This has been changed so that if the ip literal address matches
6117 ignore_target_hosts, the router declines.
6119 7. Added expansion conditions match_domain, match_address, and match_local_
6120 part (NOT match_host).
6122 8. The placeholder for the Received: header didn't have a length field set.
6124 9. Added code to Exim itself and to exim_lock to test for a specific race
6125 condition that could lead to file corruption when using MBX delivery. The
6126 issue is with the lockfile that is created in /tmp. If this file is removed
6127 after a process has opened it but before that process has acquired a lock,
6128 there is the potential for a second process to recreate the file and also
6129 acquire a lock. This could lead to two Exim processes writing to the file
6130 at the same time. The added code performs the same test as UW imapd; it
6131 checks after acquiring the lock that its file descriptor still refers to
6132 the same named file.
6134 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6135 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6138 11. Added the smtp_active_hostname option. If used, this will typically be made
6139 to depend on the incoming interface address. Because $interface_address is
6140 not set up until the daemon has forked a reception process, error responses
6141 that can happen earlier (such as "too many connections") no longer contain
6144 12. If an expansion in a condition on a "warn" statement fails because a lookup
6145 defers, the "warn" statement is abandoned, and the next ACL statement is
6146 processed. Previously this caused the whole ACL to be aborted.
6148 13. Added the iplsearch lookup type.
6150 14. Added ident_timeout as a log selector.
6152 15. Added tls_certificate_verified as a log selector.
6154 16. Added a global option tls_require_ciphers (compare the smtp transport
6155 option of the same name). This controls incoming TLS connections.
6157 17. I finally figured out how to make tls_require_ciphers do a similar thing
6158 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6159 before starting the TLS session.
6161 18. Tabs are now shown as \t in -bP output.
6163 19. If the log selector return_path_on_delivery was set, Exim crashed when
6164 bouncing a message because it had too many Received: header lines.
6166 20. If two routers both had headers_remove settings, and the first one included
6167 a superfluous trailing colon, the final name in the first list and the
6168 first name in the second list were incorrectly joined into one item (with a
6169 colon in the middle).
6175 1. Added -C and -D options to the exinext utility, mainly to make it easier
6176 to include in the automated testing, but these could be helpful when
6177 multiple configurations are in use.
6179 2. The exinext utility was not formatting the output nicely when there was
6180 an alternate port involved in the retry record key, nor when there was a
6181 message id as well (for retries that were specific to a specific message
6182 and a specific host). It was also confused by IPv6 addresses, because of
6183 the additional colons they contain. I have fixed the IPv4 problem, and
6184 patched it up to do a reasonable job for IPv6.
6186 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6187 delivery, the log line now contains "pipelined" if PIPELINING was used.
6189 4. An SMTP transport process used to panic and die if the bind() call to set
6190 an explicit outgoing interface failed. This has been changed; it is now
6191 treated in the same way as a connect() failure.
6193 5. A reference to $sender_host_name in the part of a conditional expansion
6194 that was being skipped was still causing a DNS lookup. This no longer
6197 6. The def: expansion condition was not recognizing references to header lines
6198 that used bh_ and bheader_.
6200 7. Added the _cache feature to named lists.
6202 8. The code for checking quota_filecount in the appendfile transport was
6203 allowing one more file than it should have been.
6205 9. For compatibility with Sendmail, the command line option
6213 and sets the incoming protocol and host name (for trusted callers). The
6214 host name and its colon can be omitted when only the protocol is to be set.
6215 Note the Exim already has two private options, -pd and -ps, that refer to
6216 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6217 "s", but I don't think that's a major issue.
6219 10. A number of refactoring changes to the code, none of which should affect
6222 (a) The number of logging options was getting close to filling up the
6223 32-bit word that was used as a bit map. I have split them into two classes:
6224 those that are passed in the argument to log_write(), and those that are
6225 only ever tested independently outside of that function. These are now in
6226 separate 32-bit words, so there is plenty of room for expansion again.
6227 There is no change in the user interface or the logging behaviour.
6229 (b) When building, for example, log lines, the code previously used a
6230 macro that called string_cat() twice, in order to add two strings. This is
6231 not really sufficiently general. Furthermore, there was one instance where
6232 it was actually wrong because one of the argument was used twice, and in
6233 one call a function was used. (As it happened, calling the function twice
6234 did not affect the overall behaviour.) The macro has been replaced by a
6235 function that can join an arbitrary number of extra strings onto a growing
6238 (c) The code for expansion conditions now uses a table and a binary chop
6239 instead of a serial search (which was left over from when there were very
6240 few conditions). Also, it now recognizes conditions like "pam" even when
6241 the relevant support is not compiled in: a suitably worded error message is
6242 given if an attempt is made to use such a condition.
6244 11. Added ${time_interval:xxxxx}.
6246 12. A bug was causing one of the ddress fields not to be passed back correctly
6247 from remote delivery subprocesses. The field in question was not being
6248 subsequently used, so this caused to problems in practice.
6250 13. Added new log selectors queue_time and deliver_time.
6252 14. Might have fixed a bug in maildirsizefile handling that threw up
6253 "unexpected character" debug warnings, and recalculated the data
6254 unnecessarily. In any case, I expanded the warning message to give more
6257 15. Added the message "Restricted characters in address" to the statements in
6258 the default ACL that block characters like @ and % in local parts.
6260 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6261 Three changes have been made:
6263 (a) There was a serious bug; a negative response to MAIL caused the whole
6264 recipient domain to be cached as invalid, thereby blocking all messages
6265 to all local parts at the same domain, from all senders. This bug has
6266 been fixed. The domain is no longer cached after a negative response to
6267 MAIL if the sender used is not empty.
6269 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6272 (c) A new callout option, "use_sender" has been added for people who want
6273 the modified behaviour.
6279 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6282 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6283 indeed breaks things for older releases.
6285 3. Added additional logging to the case where there is a problem reading data
6286 from a filter that is running in a subprocess using a pipe, in order to
6287 try to track down a specific problem.
6289 4. Testing facility fudge: when running in the test harness and attempting
6290 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6291 getting "No route to host". Convert this to a timeout.
6293 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6296 6. Some OS don't have socklen_t but use size_t instead. This affects the
6297 fifth argument of getsockopt() amongst other things. This is now
6298 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6299 can be set for individual OS. I have set it for SunOS5, OSF1, and
6300 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6301 some earlier ones do not.
6303 7. Change 4.30/15 was not doing the test caselessly.
6305 8. The standard form for an IPv6 address literal was being rejected by address
6306 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6307 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6308 this, as well as the form without the "IPv6" on the front (but only when
6309 address literals are enabled, of course).
6311 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6313 10. Exim crashed if a message with an empty sender address specified by -f
6314 encountered a router with an errors_to setting. This could be provoked only
6315 by a command such as
6319 where an empty string was supplied; "<>" did not hit this bug.
6321 11. Installed PCRE release 4.5.
6323 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6324 remained set. It is now erased.
6326 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6327 times from message ids (which are base 36 rather than the normal 62).
6329 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6330 were being counted as actual protocol errors, and logged if the log
6331 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6332 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6333 and DATA following a set of rejected RCPTs do not count as protocol errors.
6334 In other words, Exim assumes they were pipelined, though this may not
6335 actually be the case. Of course, in all cases the client gets an
6336 appropriate error code.
6338 15. If a lookup fails in an ACL condition, a message about the failure may
6339 be available; it is used if testing the ACL cannot continue, because most
6340 such messages specify what the cause of the deferral is. However, some
6341 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6342 that caused an old message to be retained and used if a later statement
6343 caused a defer, replacing the real cause of the deferral.
6345 16. If an IP address had so many PTR records that the DNS lookup buffer
6346 was not large enough to hold them, Exim could crash while trying to process
6347 the truncated data. It now detects and logs this case.
6349 17. Further to 4.21/58, another change has been made: if (and only if) the
6350 first line of a message (the first header line) ends with CRLF, a bare LF
6351 in a subsequent header line has a space inserted after it, so as not to
6352 terminate the header.
6354 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6355 unnecessarily, used atoi() instead of strtol(), and didn't check the
6356 termination when getting file sizes from file names by regex.
6358 19. Completely re-implemented the support for maildirsize files, in the light
6359 of a number of problems with the previous contributed implementation
6360 (4.30/29). In particular:
6362 . If the quota is zero, the maildirsize file is maintained, but no quota is
6365 . If the maildir directory does not exist, it is created before any attempt
6366 to write a maildirsize file.
6368 . The quota value in the file is just a cache; if the quota is changed in
6369 the transport, the new value overrides.
6371 . A regular expression is available for excluding directories from the
6374 20. The autoreply transport checks the characters in options that define the
6375 message's headers; it allows continued headers, but it was checking with
6376 isspace() after an embedded newline instead of explicitly looking for a
6379 21. If all the "regular" hosts to which an address was routed had passed their
6380 expiry times, and had not reached their retry times, the address was
6381 bounced, even if fallback hosts were defined. Now Exim should go on to try
6384 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6385 equivalent code in the SMTP transport. Some hosts send humungous responses
6386 to HELO/EHLO, more than 1024 it seems.
6388 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6389 gives compiler warnings in some environments. I've now done it "properly",
6392 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6393 (because of problems with the built-in one) was declared to return uschar *
6394 instead of char *, causing compiler failure.
6396 25. Fixed a file descriptor leak when processing alias/forward files.
6398 26. Fixed a minor format string issue in dbfn.c.
6400 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6402 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6403 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6406 29. When a sender address is verified, it is cached, to save repeating the test
6407 when there is more than one recipient in a message. However, when the
6408 verification involves a callout, it is possible for different callout
6409 options to be set for different recipients. It is too complicated to keep
6410 track of this in the cache, so now Exim always runs a verification when a
6411 callout is required, relying on the callout cache for the optimization.
6412 The overhead is duplication of the address routing, but this should not be
6415 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6416 to be verified with callout=postmaster, and the main callout worked but the
6417 postmaster check failed, the verification correctly failed. However, if a
6418 subsequent RCPT command asked for sender verification *without* the
6419 postmaster check, incorrect caching caused this verification also to fail,
6422 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6423 it was not caching the DNS options (qualify_single, search_parents) that
6424 were used when the lookup failed. A subsequent lookup with different
6425 options therefore always gave the same answer, though there were cases
6426 where it should not have. (Example: a "domains = !$mx_any" option on a
6427 dnslookup router: the "domains" option is always processed without any
6428 widening, but the router might have qualify_single set.) Now Exim uses the
6429 cached value only when the same options are set.
6431 32. Added John Jetmore's "exipick" utility to the distribution.
6433 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6434 than a timeout (e.g. a certificate is required, and is not provided), an
6435 Exim server now closes the connection immediately. Previously it waited for
6436 the client to close - but if the client is SSL, it seems that they each
6437 wait for each other, leading to a delay before one of them times out.
6439 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6440 maintained 0.8.x compatibility because I don't think many are using it, and
6441 it is clearly obsolete.
6443 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6446 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6447 client certificate was expired. A simple patch fixes this, though I don't
6448 understand the full logic of why the verify callback is called multiple
6451 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6452 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6453 which causes problems with some clients (such as the Certicom SSL Plus
6454 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6455 disables the coutermeasure allowing Eudora to connect."
6457 38. Exim was not checking that a write() to a log file succeeded. This could
6458 lead to Bad Things if a log got too big, in particular if it hit a file
6459 size limit. Exim now panics and dies if it cannot write to a log file, just
6460 as it does if it cannot open a log file.
6462 39. Modified OS/Makefile-Linux so that it now contains
6464 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6466 The two -D definitions ensure that Exim is compiled with large file
6467 support, which makes it possible to handle log files that are bigger than
6470 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6471 instance) a domain was checked against a named list that involved a lookup,
6472 causing $domain_data to be set, then another domain was checked against the
6473 same list, then the first domain was re-checked, the value of $domain_data
6474 after the final check could be wrong. In particular, if the second check
6475 failed, it could be set empty. This bug probably also applied to
6478 41. The strip_trailing_dot option was not being applied to the address given
6479 with the -f command-line option.
6481 42. The code for reading a message's header from the spool was incrementing
6482 $received_count, but never initializing it. This meant that the value was
6483 incorrect (doubled) while delivering a message in the same process in which
6484 it was received. In the most common configuration of Exim, this never
6485 happens - a fresh exec is done - but it can happen when
6486 deliver_drop_privilege is set.
6488 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6489 it now includes up to 150 characters of the unexpected data in the log
6492 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6493 and building data strings. The size of both of these buffers was 10 000
6494 bytes - far larger than anybody would *ever* want, thought I. Needless to
6495 say, somebody hit the limit. I have increased the maximum line length to
6496 20 000 and the maximum data length of concatenated lines to 100 000. I have
6497 also fixed two bugs, because there was no checking on these buffers. Tsk,
6498 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6499 buffer is too small.
6501 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6502 lsearch lookups. Now it does.
6504 46. When parsing a route_list item in a manualroute router, a fixed-length
6505 buffer was used for the list of hosts. I made this 1024 bytes long,
6506 thinking that nobody would ever have a list of hosts that long. Wrong.
6507 Somebody had a whole pile of complicated expansion conditions, and the
6508 string was silently truncated, leading to an expansion error. It turns out
6509 that it is easier to change to an unlimited length (owing to other changes
6510 that have happened since this code was originally written) than to build
6511 structure for giving a limitation error. The length of the item that
6512 expands into the list of hosts is now unlimited.
6514 47. The lsearch lookup could not handle data where the length of text line was
6515 more than 4095 characters. Such lines were truncated, leading to shortened
6516 data being returned. It should now handle lines of any length.
6518 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6519 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6522 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6523 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6524 no longer happens in comment lines. A list of replacements is now placed
6525 at the head of all of the source files, except those whose only change is
6526 to replace PERL_COMMAND in the very first #! line.
6528 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6529 messages on the queue, with a bottom-up merge sort, using code contributed
6530 by Michael Haardt. This should make operations like -bp somewhat faster on
6531 large queues. It won't affect queue runners, except when queue_run_in_order
6534 51. Installed eximstats 1.31 in the distribution.
6536 52. Added support for SRV lookups to the dnslookup router.
6538 53. If an ACL referred to $message_body or $message_body_end, the value was not
6539 reset for any messages that followed in the same SMTP session.
6541 54. The store-handling optimization for building very long strings was not
6542 differentiating between the different store pools. I don't think this
6543 actually made any difference in practice, but I've tidied it.
6545 55. While running the routers to verify a sender address, $sender_address
6546 was still set to the sender address. This is wrong, because when routing to
6547 send a bounce to the sender, it would be empty. Therefore, I have changed
6548 it so that, while verifying a sender address, $sender_address is set to <>.
6549 (There is no change to what happens when verifying a recipient address.)
6551 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6552 target A or AAAA records (if not already returned) without resetting the
6553 qualify_single or search_parents options of the DNS resolver. These are
6554 inappropriate in this case because the targets of MX and SRV records must
6555 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6556 target that, when qualified, matched something in the local domain. These
6557 two options are now turned off when doing these lookups.
6559 57. It seems that at least some releases of Reiserfs (which does not have the
6560 concept of a fixed number of inodes) returns zero and not -1 for the
6561 number of available inodes. This interacted badly with check_spool_inodes,
6562 which assumed that -1 was the "no such thing" setting. What I have done is
6563 to check that the total number of inodes is greater than zero before doing
6564 the test of how many are available.
6566 58. When a "warn" ACL statement has a log_message modifier, the message is
6567 remembered, and not repeated. This is to avoid a lot of repetition when a
6568 message has many recipients that cause the same warning to be written.
6569 However, Exim was preserving the list of already written lines for an
6570 entire SMTP session, which doesn't seem right. The memory is now reset if a
6571 new message is started.
6573 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6574 debugging output unless log_rewrite was also set.
6576 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6577 of (int)(handle) when we know that handle contains (void *)(-1).
6579 61. The Exim daemon panic-logs an error return when it closes the incoming
6580 connection. However "connection reset by peer" seems to be common, and
6581 isn't really an error worthy of noting specially, so that particular error
6584 62. When Exim is trying to find all the local interfaces, it used to panic and
6585 die if the ioctl to get the interface flags failed. However, it seems that
6586 on at least one OS (Solaris 9) it is possible to have an interface that is
6587 included in the list of interfaces, but for which you get a failure error
6588 for this call. This happens when the interface is not "plumbed" into a
6589 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6590 failure of the "get flags" call assumes that the interface is down.
6592 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6593 makes life easier for people who are doing arithmetic on fields extracted
6594 from dates, where you often get leading zeros that should not be
6595 interpreted as octal.
6597 64. Added qualify_domain to the redirect router, to override the global
6600 65. If a pathologically long header line contained very many addresses (the
6601 report of this problem mentioned 10 000) and each of them was rewritten,
6602 Exim could use up a very large amount of memory. (It kept on making new
6603 copies of the header line as it rewrote, and never released the old ones.)
6604 At the expense of a bit more processing, the header rewriting function has
6605 been changed so that it no longer eats memory in this way.
6607 66. The generation of the Received: header has been moved from the time that a
6608 message starts to be received, to the time that it finishes. The timestamp
6609 in the Received: header should now be very close to that of the <= log
6610 line. There are two side-effects of this change:
6612 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6613 logged header lines no longer include the local Received: line, because
6614 it has not yet been created. The same applies to a copy of the message
6615 that is returned to a non-SMTP sender when a message is rejected.
6617 (b) When a filter file is tested using -bf, no additional Received: header
6618 is added to the test message. After some thought, I decided that this
6621 This change does not affect the value of $received_for. It is still set
6622 after address rewriting, but before local_scan() is called.
6624 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6626 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6627 gave an unhelpful panic error message, and a defer error. I have managed to
6628 change this behaviour so that it now rejects any supplied certificate,
6629 which seems right, as the list of acceptable certificates is empty.
6631 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6632 gave an unhelpful defer error. I have not managed to make this reject any
6633 supplied certificates, but the error message it gives is "no certificate
6634 supplied", which is not helpful.
6636 70. exigrep's output now also includes lines that are not associated with any
6637 message, but which match the given pattern. Implemented by a patch from
6638 Martin Sluka, which also tidied up the Perl a bit.
6640 71. Recipient callout verification, like sender verification, was using <> in
6641 the MAIL FROM command. This isn't really the right thing, since the actual
6642 sender may affect whether the remote host accepts the recipient or not. I
6643 have changed it to use the actual sender in the callout; this means that
6644 the cache record is now keyed on a recipient/sender pair, not just the
6645 recipient address. There doesn't seem to be a real danger of callout loops,
6646 since a callout by the remote host to check the sender would use <>.
6647 [SEE ABOVE: changed after hitting problems.]
6649 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6650 temporary errors. However, in the case of such a code being given after
6651 the end of a data transmission (i.e. after ".") Exim was failing to write
6652 a retry record for the message. (Yes, there was some broken host that was
6653 actually sending 8xx at this point.)
6655 73. An unknown lookup type in a host list could cause Exim to panic-die when
6656 the list was checked. (An example that provoked this was putting <; in the
6657 middle of a list instead of at the start.) If this happened during a DATA
6658 ACL check, a -D file could be left lying around. This kind of configuration
6659 error no longer causes Exim to die; instead it causes a defer error. The
6660 incident is still logged to the main and panic logs.
6662 74. Buglet left over from Exim 3 conversion. The message "too many messages
6663 in one connection" was written to the rejectlog but not the mainlog, except
6664 when address rewriting (yes!) was being logged.
6666 75. Added write_rejectlog option.
6668 76. When a system filter was run not as root (that is, when system_filter_user
6669 was set), the values of the $n variables were not being returned to the
6670 main process; thus, they were not subsequently available in the $sn
6673 77. Added +return_path_on_delivery log selector.
6675 78. A connection timeout was being treated differently from recipients deferred
6676 when testing hosts_max_try with a message that was older than the host's
6677 retry timeout. (The host should not be counted, thus allowing all hosts to
6678 be tried at least once before bouncing.) This may have been the cause of an
6679 occasionally reported bug whereby a message would remain on the queue
6680 longer than the retry timeout, but would be bounced if a delivery was
6681 forced. I say "may" because I never totally pinned down the problem;
6682 setting up timeout/retry tests is difficult. See also the next item.
6684 79. The ultimate address timeout was not being applied to errors that involved
6685 a combination of host plus message (for example, a timeout on a MAIL
6686 command). When an address resolved to a number of possible hosts, and they
6687 were not all tried for each delivery (e.g. because of hosts_max_try), a
6688 message could remain on the queue longer than the retry timeout.
6690 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6693 81. Fixed an obscure SMTP outgoing bug which required at least the following
6694 conditions: (a) there was another message waiting for the same server;
6695 (b) the server returned 5xx to all RCPT commands in the first message so
6696 that the message was not completed; (c) the server dropped the connection
6697 or gave a negative response to the RSET that Exim sends to abort the
6698 transaction. The observed case was a dropped connection after DATA that had
6699 been sent in pipelining mode. That is, the server had advertised PIPELINING
6700 but was not implementing it correctly. The effect of the bug was incorrect
6701 behaviour, such as trying another host, and this could lead to a crash.
6707 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6708 and daemon.c were passed as pointers to ints; they should have been
6709 pointers to socklen_t variables (which are typically unsigned ints).
6711 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6714 3. Fixed a really odd bug that affected only the testing scheme; patching a
6715 certain fixed string in the binary changed the value of another string that
6716 happened to be identical to the end of the original first string.
6718 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6719 name", it returns that address as the IP address. On some operating
6720 systems (e.g. Solaris), it also passes back the IP address string as the
6721 "host name". However, on others (e.g. Linux), it passes back an empty
6722 string. Exim wasn't checking for this, and was changing the host name to an
6723 empty string, assuming it had been canonicalized.
6725 5. Although rare, it is permitted to have more than one PTR record for a given
6726 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6727 all the names associated with an address, because they do in Solaris.
6728 However, it seems that they do not in Linux for data that comes from the
6729 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6730 I found this out when I moved to a new Linux workstation and tried to run
6731 the Exim test suite.
6733 To get round this problem I have changed the code so that it now does its
6734 own call to the DNS to look up PTR records when searching for a host name.
6735 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6736 addresses that are only in /etc/hosts are still found.
6738 This behaviour is, however, controlled by an option called host_lookup_
6739 order, which defaults to "bydns:byaddr". If people want to use the other
6740 order, or indeed, just use one or the other means of lookup, they can
6741 specify it in this variable.
6743 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6744 some operating systems, this comes back from gethostbyaddr() as an empty
6745 string, and this is what Exim used to test for. However, it seems that in
6746 other systems, "." is yielded. Exim now tests for this case too.
6748 7. The values of check_spool_space and check_log_space are now held internally
6749 as a number of kilobytes instead of an absolute number of bytes. If a
6750 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6751 kilobyte. This means that much larger values can be stored.
6753 8. Exim monitor: an attempt to get the action menu when not actually pointing
6754 at a message produces an empty menu entitled "No message selected". This
6755 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6756 no entries in it ("Shell widget menu has zero width and/or height"). So I
6757 have added a single, blank menu entry in this case.
6759 9. Added ${quote_local_part.
6761 10. MIME decoding is now applied to the contents of Subject: header lines when
6764 11. Now that a reference to $sender_host_address automatically causes a reverse
6765 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6766 host lookup before query-style lookups in lists that might use this
6767 variable. This has therefore been abolished, and the "net-" prefix is no
6768 longer necessary for query-style lookups.
6770 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6771 have been a typo for LFLAGS, so it has been changed.
6773 13. The install script calls Exim with "-C /dev/null" in order to find the
6774 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6775 to be output. However, since Exim outputs its version number before the
6776 error, it didn't break the script. It just looked ugly. I fixed this by
6777 always allowing "-C /dev/null" if the caller is root.
6779 14. Ignore overlarge ACL variable number when reading spool file - insurance
6780 against a later release with more variables having written the file.
6782 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6783 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6784 this, as well as the form without the "IPv6" on the front.
6786 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6787 OS/Makefile-Darwin file.
6789 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6790 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6792 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6793 variable. However, some OS use ints for inodes. I've added cast to long int
6794 to get rid of the compiler warning.
6796 19. I had forgotten to lock out "/../" in configuration file names when
6797 ALT_CONFIG_PREFIX was set.
6799 20. Routers used for verification do not need to specify transports. However,
6800 if such a router generated a host list, and callout was configured, Exim
6801 crashed, because it could not find a port number from the (non-existent)
6802 transport. It now assumes port 25 in this circumstance.
6804 21. Added the -t option to exigrep.
6806 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6807 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6808 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6809 them is set, LOOKUP_LSEARCH is forced.
6811 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6813 24. Added sender and host information to the "rejected by local_scan()" log
6814 line; previously there was no indication of these.
6816 25. Added .include_if_exists.
6818 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6819 Linux. It turns out that not all file systems support this. Apparently some
6820 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6821 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6822 not supported on the file descriptor, is now ignored when Exim is trying to
6823 sync a directory. This applies only to Linux.
6825 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6827 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6828 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6831 29. Added support for maildirsize files from supplied patch (modified a bit).
6833 30. The use of :fail: followed by an empty string could lead Exim to respond to
6834 sender verification failures with (e.g.):
6836 550 Verification failed for <xxx>
6837 550 Sender verify failed
6839 where the first response line was missing the '-' that indicates it is not
6840 the final line of the response.
6842 31. The loop for finding the name of the user that called Exim had a hardwired
6843 limit of 10; it now uses the value of finduser_retries, which is used for
6844 all other user lookups.
6846 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6849 33. Exim was neglecting to zero errno before one call of strtol() when
6850 expanding a string and expecting an integer value. On some systems this
6851 resulted in spurious "integer overflow" errors. Also, it was casting the
6852 result into an int without checking.
6854 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6855 did not work. The code looks as if it has *never* worked, though it appears
6856 to have been documented since at least release 1.62. I have made it work.
6858 35. The "timeout_DNS" error in retry rules, also documented since at least
6859 1.62, also never worked. As it isn't clear exactly what this means, and
6860 clearly it isn't a major issue, I have abolished the feature by treating it
6861 as "timeout", and writing a warning to the main and panic logs.
6863 36. The display of retry rules for -brt wasn't always showing the error code
6866 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6867 timeout_connect_A, timeout_connect_MX.
6869 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6870 to the empty sender.
6872 39. The daemon was not analysing the content of -oX till after it had closed
6873 stderr and disconnected from the controlling terminal. This meant that any
6874 syntax errors were only noted on the panic log, and the return code from
6875 the command was 0. By re-arranging the code a little, I've made the
6876 decoding happen first, so such errors now appear on stderr, and the return
6877 code is 1. However, the actual setting up of the sockets still happens in
6878 the disconnected process, so errors there are still only recorded on the
6881 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6882 connections (as happens on some IP stacks) was logged at start up time as
6883 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6884 it from "IPv6 and IPv4", which means that two separate sockets are being
6887 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6888 says whether AF_INET or AF_INET6 was passed as an argument.
6890 42. Exiwhat output was messed up when time zones were included in log
6893 43. Exiwhat now gives more information about the daemon's listening ports,
6894 and whether -tls-on-connect was used.
6896 44. The "port" option of the smtp transport is now expanded.
6898 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6899 silently ignored. Now an error message is written to the main and panic
6902 46. There's a new ACL modifier called "logwrite" which writes to a log file
6903 as soon as it is encountered.
6905 47. Added $local_user_uid and $local_user_gid at routing time.
6907 48. Exim crashed when trying to verify a sender address that was being
6910 49. Exim was recognizing only a space character after ".include". It now also
6911 recognizes a tab character.
6913 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6914 extracting the relevant information from the specification. The man page no
6915 longer contains scrambled data for the -d option, and I've added a section
6916 at the front about calling Exim under different names.
6918 51. Added "extra_headers" argument to the "mail" command in filter files.
6920 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6923 53. Installed eximstats 1.29.
6925 54. Added transport_filter_timeout as a generic transport option.
6927 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6928 Cc: header lines. This was required by RFC 822, but it not required by RFC
6931 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6932 incoming messages that did not have them. Now it does so only if the
6933 message originates locally, that is, if there is no associated remote host
6934 address. When Resent- header lines are present, this applies to the Resent-
6935 lines rather than the non-Resent- lines.
6937 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6938 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6940 58. Messages for configuration errors now include the name of the main
6941 configuration file - useful now that there may be more than one file in a
6942 list (.included file names were always shown).
6944 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6945 for those rare installations that do not start the daemon as root or run it
6946 setuid root. I've cut out the call to initgroups() if the daemon is not
6949 60. The Exim user and group can now be bound into the binary as text strings
6950 that are looked up at the start of Exim's processing.
6952 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6954 62. Added $mailstore_basename variable.
6956 63. Installed patch to sieve.c from Michael Haardt.
6958 64. When Exim failed to open the panic log after failing to open the main log,
6959 the original message it was trying to log was written to stderr and debug
6960 output, but if they were not available (the usual case in production), it
6961 was lost. Now it is written to syslog before the two lines that record the
6962 failures to open the logs.
6964 65. Users' Exim filters run in subprocesses under the user's uid. It is
6965 possible for a "deliver" command or an alias in a "personal" command to
6966 provoke an address rewrite. If logging of address rewriting is configured,
6967 this fails because the process is not running as root or exim. There may be
6968 a better way of dealing with this, but for the moment (because 4.30 needs
6969 to be released), I have disabled address rewrite logging when running a
6970 filter in a non-root, non-exim process.
6976 1. The buildconfig auxiliary program wasn't quoting the value set for
6977 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6978 not defined. This bug was masked in 4.22 by the effect that was fixed in
6981 2. Some messages that were rejected after a message id was allocated were
6982 shown as "incomplete" by exigrep. It no longer does this for messages that
6983 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6985 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6986 have allow_domain_literals set, the ID did not get logged in the <= line.
6987 Domain literals are now always recognized in Message-ID: header lines.
6989 4. The first argument for a ${extract expansion item is the key name or field
6990 number. Leading and trailing spaces in this item were not being ignored,
6991 causing some misleading effects.
6993 5. When deliver_drop_privilege was set, single queue runner processes started
6994 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6995 same command in the process it spins off) were not dropping privilege.
6997 6. When the daemon running as "exim" started a queue runner, it always
6998 re-executed Exim in the spun-off process. This is a waste of effort when
6999 deliver_drop_privilege is set. The new process now just calls the
7000 queue-runner function directly.
7006 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7009 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7010 ignored. Though the use of -oP was forcing the writing of a pid file, it
7011 was always written to the default place.
7013 3. If the message "no IP address found for host xxxx" is generated during
7014 incoming verification, it is now followed by identification of the incoming
7015 connection (so you can more easily find what provoked it).
7017 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7019 5. Added some features to "harden" Exim a bit more against certain attacks:
7021 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7022 be put in Local/Makefile. This is like the never_users runtime option,
7023 but it cannot be overridden. The default setting is "root".
7025 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7026 prefix string with which any file named in a -C command line option
7029 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7030 is retained for -C and -D only if the caller of Exim is root. Without
7031 it, the exim user may also use -C and -D and retain privilege.
7033 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7034 command line option is disabled.
7036 6. Macro names set by the -D option must start with an upper case letter, just
7037 like macro names defined in the configuration file.
7039 7. Added "dereference=" facility to LDAP.
7041 8. Two instances of the typo "uknown" in the source files are fixed.
7043 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7044 the Configure-Makefile script screwed up while processing it.
7046 10. Incorporated PCRE 4.4.
7048 11. The SMTP synchronization check was not operating right at the start of an
7049 SMTP session. For example, it could not catch a HELO sent before the client
7050 waited for the greeting. There is now a check for outstanding input at the
7051 point when the greeting is written. Because of the duplex, asynchronous
7052 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7053 way, but not yet received, when the check is performed.
7055 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7056 on TCP/IP sockets, because this apparently causes some broken clients to
7059 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7060 unchanged) from the Cygwin maintainer.
7062 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7063 was supported instead of testing for mbx. Effectively a typo.
7065 15. The spa authenticator server code was not checking that the input it
7066 received was valid base64.
7068 16. The debug output line for the "set" modifier in ACLs was not showing the
7069 name of the variable that was being set.
7071 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7073 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7074 lookup on its own. Something else was needed to trigger the lookup. For
7075 example, a match in host_lookup or the need for a host name in a host list.
7076 Now, if $sender_host_name is referenced and the host name has not yet been
7077 looked up, a lookup is performed. If the lookup fails, the variable remains
7078 empty, and $host_lookup_failed is set to "1".
7080 19. Added "eqi" as a case-independent comparison operator.
7082 20. The saslauthd authentication condition could segfault if neither service
7083 nor realm was specified.
7085 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7086 error message that was logged was misleading, and incoming SMTP
7087 connections were dropped. The message is now more accurate, and temporary
7088 errors are given to SMTP connections.
7090 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7091 (except RSET) with a 421 error, until QUIT is received. However, it was
7092 failing to send a response to QUIT.
7094 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7095 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7096 ACL is now run after the helo_try_verify_hosts code.
7098 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7099 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7100 case-independent, so other case variants are also recognized). Apparently
7101 some systems use these upper case variants.
7103 25. If more than two messages were waiting for the same host, and a transport
7104 filter was specified for the transport, Exim sent two messages over the
7105 same TCP/IP connection, and then failed with "socket operation on non-
7106 socket" when it tried to send the third.
7108 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7110 27. The extern definition of crypt16() in expand.c was not being excluded when
7111 the OS had its own crypt16() function.
7113 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7114 as a preferred synonym for return_size_limit, both as an option and as an
7117 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7119 30. Changed the default configuration ACL to relax the local part checking rule
7120 for addresses that are not in any local domains. For these addresses,
7121 slashes and pipe symbols are allowed within local parts, but the sequence
7122 /../ is explicitly forbidden.
7124 31. SPA server authentication was not clearing the challenge buffer before
7127 32. log_message in a "warn" ACL statement was writing to the reject log as
7128 well as to the main log, which contradicts the documentation and doesn't
7129 seem right (because no rejection is happening). So I have stopped it.
7131 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7132 However, I am unable to do any testing of this.
7134 34. Fixed an infelicity in the appendfile transport. When checking directories
7135 for a mailbox, to see if any needed to be created, it was accidentally
7136 using path names with one or more superfluous leading slashes; tracing
7137 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7139 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7140 contents are added to the log line that is written for every discarded
7141 recipient. (Previously a log_message setting was ignored.)
7143 36. The ${quote: operator now quotes the string if it is empty.
7145 37. The install script runs exim in order to find its version number. If for
7146 some reason other than non-existence or emptiness, which it checks, it
7147 could not run './exim', it was installing it with an empty version number,
7148 i.e. as "exim-". This error state is now caught, and the installation is
7151 38. An argument was missing from the function that creates an error message
7152 when Exim fails to connect to the socket for saslauthd authentication.
7153 This could cause Exim to crash, or give a corrupted message.
7155 39. Added isip, isip4, and isip6 to ${if conditions.
7157 40. The ACL variables $acl_xx are now saved with the message, and can be
7158 accessed later in routers, transports, and filters.
7160 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7161 strings in the file are not string-expanded.
7163 42. If a MAIL command specified a SIZE value that was too large to fit into an
7164 int variable, the check against message_size_limit failed. Such values are
7165 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7166 day this will have to be increased, but I don't think I want to be around
7167 when emails are that large.
7174 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7175 iconv() is not standard in FreeBSD.
7177 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7178 IPv6 enabled. The observed symptom was a segmentation fault on return from
7179 the function os_common_find_running_interfaces() in src/os.c.
7181 3. In the check_special_case() function in daemon.c I had used "errno" as an
7182 argument name, which causes warnings on some systems. This was basically a
7183 typo, since it was named "eno" in the comments!
7185 4. The code that waits for the clock to tick (at a resolution of some fraction
7186 of a second) so as to ensure message-id uniqueness was always waiting for
7187 at least one whole tick, when it could have waited for less. [This is
7188 almost certainly not relevant at current processor speeds, where it is
7189 unlikely to ever wait at all. But we try to future-proof.]
7191 5. The function that sleeps for a time interval that includes fractions of a
7192 second contained a race. It did not block SIGALRM between setting the
7193 timer, and suspending (a couple of lines later). If the interval was short
7194 and the sigsuspend() was delayed until after it had expired, the suspension
7195 never ended. On busy systems this could lead to processes getting stuck for
7198 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7199 process, before it forks any delivery processes. The open lookup caching
7200 mechanism meant that the open file or database connection was passed into
7201 the delivery process. The problem was that delivery processes always tidy
7202 up cached lookup data. This could cause a problem for the next delivery
7203 process started by the queue runner, because the external queue runner
7204 process does not know about the closure. So the next delivery process
7205 still has data in the lookup cache. In the case of a file lookup, there was
7206 no problem because closing a file descriptor in a subprocess doesn't affect
7207 the parent. However, if the lookup was caching a connection to a database,
7208 the connection was closed, and the second delivery process was likely to
7209 see errors such as "PGSQL: query failed: server closed the connection
7210 unexpectedly". The problem has been fixed by closing all cached lookups
7211 in a queue runner before running a delivery process.
7213 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7214 seem to have the "const" qualifier which it has on other OS. I've
7217 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7218 *of the same type* (client or server) with the same public name that an
7219 error should be diagnosed.
7221 9. When Exim looked up a host name for an IP address, but failed to find the
7222 original IP address when looking up the host name (a safety check), it
7223 output the message "<ip address> does not match any IP for NULL", which was
7224 confusing, to say the least. The bug was that the host name should have
7225 appeared instead of "NULL".
7227 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7228 user that is built into the binary, and the -C or -D options is used, root
7229 privilege is dropped before the configuration file is read. In addition,
7230 logging is switched to stderr instead of the normal log files. If the
7231 configuration then re-defines the Exim user, the unprivileged environment
7232 is probably not what is expected, so Exim logs a panic warning message (but
7235 However, if deliver_drop_privilege is set, the unprivileged state may well
7236 be exactly what is intended, so the warning has been cut out in that case,
7237 and Exim is allowed to try to write to its normal log files.
7243 1. smtp_return_error_details was not giving details for temporary sender
7244 or receiver verification errors.
7246 2. Diagnose a configuration error if two authenticators have the same public
7249 3. Exim used not to create the message log file for a message until the first
7250 delivery attempt. This could be confusing when incoming messages were held
7251 for policy or load reasons. The message log file is now created at the time
7252 the message is received, and an initial "Received" line is written to it.
7254 4. The automatically generated man page for command line options had a minor
7255 bug that caused no ill effects; however, a more serious problem was that
7256 the procedure for building the man page automatically didn't always
7257 operate. Consequently, release 4.20 contains an out-of-date version. This
7258 shouldn't happen again.
7260 5. When building Exim with embedded Perl support, the script that builds the
7261 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7262 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7264 6. The freeze_tell option was not being used for messages that were frozen on
7265 arrival, either by an ACL or by local_scan().
7267 7. Added the smtp_incomplete_transaction log selector.
7269 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7270 was accepting AUTH without a new EHLO.
7272 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7273 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7276 10. Logging of TCP/IP connections (when configured) now happens in the main
7277 daemon process instead of the child process, so that the TCP/IP connection
7278 count is more accurate (but it can never be perfect).
7280 11. The use of "drop" in a nested ACL was not being handled correctly in the
7281 outer ACL. Now, if condition failure induced by the nested "drop" causes
7282 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7283 or "require"), the connection is dropped.
7285 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7286 that yield "discard" can now be used with an "accept" or a "discard" verb,
7287 but an error is generated for any others (because I can't see a useful way
7288 to define what should happen).
7290 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7291 are now processed in the same way as lines in the Exim configuration file.
7292 In particular, continuation lines are supported.
7294 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7296 15. Added -ti meaning -t -i.
7298 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7299 domains, and warn by logging if others are found.
7301 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7302 returned from GIFCONF when Exim is trying to find the list of interfaces on
7303 a host. The code in os.c has been modified to copy each ifreq to an aligned
7304 structure in all cases.
7306 Also, in some cases, the returned ifreq's were being copied to a 'struct
7307 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7308 means the last couple of bytes of an IPv6 address could be chopped if the
7309 ifreq contained only a normal sockaddr (14 bytes storage).
7311 18. Named domain lists were not supported in the hosts_treat_as_local option.
7312 An entry such as +xxxx was not recognized, and was treated as a literal
7315 19. Ensure that header lines added by a DATA ACL are included in the reject log
7316 if the ACL subsequently rejects the message.
7318 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7319 MD5 (which is deprecated).
7321 21. When testing a filter file using -bf, Exim was writing a message when it
7322 took the sender from a "From " line in the message, but it was not doing so
7323 when it took $return_path from a Return-Path: header line. It now does.
7325 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7326 with a valid header line field name (a series of printing characters
7327 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7329 23. Changed "disc" in the source to "disk" to conform to the documentation and
7330 the book and for uniformity.
7332 24. Ignore Sendmail's -Ooption=value command line item.
7334 25. When execve() failed while trying to run a command in a pipe transport,
7335 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7336 could be confused with a return value of 69 from the command itself. This
7337 has been changed to 127, the value the shell returns if it is asked to run
7338 a non-existent command. The wording for the related log line suggests a
7339 non-existent command as the problem.
7341 26. If received_header_text expands to an empty string, do not add a Received:
7342 header line to the message. (Well, it adds a token one on the spool, but
7343 marks it "old" so that it doesn't get used or transmitted.)
7345 27. Installed eximstats 1.28 (addition of -nt option).
7347 28. There was no check for failure on the call to getsockname() in the daemon
7348 code. This can fail if there is a shortage of resources on the system, with
7349 ENOMEM, for example. A temporary error is now given on failure.
7351 29. Contrary to the C standard, it seems that in some environments, the
7352 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7353 program. Exim now does this explicitly; it affects the formatting of
7354 timestamps using strftime().
7356 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7357 complaints. I've now initialized all the variables, to avoid this.
7359 32. Header lines added by a system filter were not being "seen" during
7360 transport-time rewrites.
7362 33. The info_callback() function passed to OpenSSL is set up with type void
7363 (*)(SSL *, int, int), as described somewhere. However, when calling the
7364 function (actually a macro) that sets it up, the type void(*)() is
7365 expected. I've put in a cast to prevent warnings from picky compilers.
7367 34. If a DNS black list lookup found a CNAME record, but there were no A
7368 records associated with the domain it pointed at, Exim crashed.
7370 35. If a DNS black list lookup returned more than one A record, Exim ignored
7371 all but the first. It now scans all returned addresses if a particular IP
7372 value is being sought. In this situation, the contents of the
7373 $dnslist_value variable are a list of all the addresses, separated by a
7376 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7377 to accept a host name and all its aliases if the forward lookup for any of
7378 them yielded the IP address of the incoming connection. Now it accepts only
7379 those names whose forward lookup yields the correct IP address. Any other
7380 names are discarded. This closes a loophole whereby a rogue DNS
7381 administrator could create reverse DNS records to break through a
7382 wildcarded host restriction in an ACL.
7384 37. If a user filter or a system filter that ran in a subprocess used any of
7385 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7386 the wrong values were passed to the pipe command ($thisaddress had the
7387 value of $0, $0 had the value of $1, etc). This bug was introduced by
7388 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7390 38. Improved the line breaking for long SMTP error messages from ACLs.
7391 Previously, if there was no break point between 40 and 75 characters, Exim
7392 left the rest of the message alone. Two changes have been made: (a) I've
7393 reduced the minimum length to 35 characters; (b) if it can't find a break
7394 point between 35 and 75 characters, it looks ahead and uses the first one
7395 that it finds. This may give the occasional overlong line, but at least the
7396 remaining text gets split now.
7398 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7399 file descriptors might be low, and that setting 1000 would always raise it.
7400 It turns out that in some environments, the limit is already over 1000 and
7401 that lowering it causes trouble. So now Exim takes care not to decrease it.
7403 40. When delivering a message, the value of $return_path is set to $sender_
7404 address at the start of routing (routers may change the value). By an
7405 oversight, this default was not being set up when an address was tested by
7406 -bt or -bv, which affected the outcome if any router or filter referred to
7409 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7410 log only when "message" or "log_message" are set. However, if one of the
7411 conditions was an address verification, or a call to a nested ACL, the
7412 messages generated by the underlying test were being passed through. This
7413 no longer happens. The underlying message is available in $acl_verify_
7414 message for both "message" and "log_message" expansions, so it can be
7415 passed through if needed.
7417 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7418 new expansion $bh_ to give the encoded byte string without charset
7419 translation. Translation happens only if iconv() is available; HAVE_ICONV
7420 indicates this at build time. HEADERS_CHARSET gives the charset to
7421 translate to; headers_charset can change it in the configuration, and
7422 "headers charset" can change it in an individual filter file.
7424 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7425 that creates RFC 2047 encoded "words" labels them as that charset instead
7426 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7427 expansion operator; (ii) when Exim creates a From: line for a local
7428 message; (iii) when a header line is rewritten to include a "phrase" part.
7430 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7431 buggy, causing it to skip the first lines of messages whose message ID
7432 ended in 'D'. This would not have bitten before Exim release 4.14, because
7433 message IDs were unlikely to end in 'D' before then. The effect was to have
7434 incorrect size information for certain domains.
7436 45. #include "config.h" was missing at the start of the crypt16.c module. This
7437 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7440 46. If there was a timeout during a "random" callout check, Exim treated it as
7441 a failure of the random address, and carried on sending RSET and the real
7442 address. If the delay was just some slowness somewhere, the response to the
7443 original RCPT would be taken as a response to RSET and so on, causing
7444 mayhem of various kinds.
7446 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7447 when I implemented it. It didn't allow for the fact that some option values
7448 may legitimately be negative (e.g. size_addition), and it didn't even do
7449 the right test for positive values.
7451 48. Domain names in DNS records are case-independent. Exim always looks them up
7452 in lower case. Some resolvers return domain names in exactly the case they
7453 appear in the zone file, that is, they may contain uppercase letters. Not
7454 all resolvers do this - some return always lower case. Exim was treating a
7455 change of case by a resolver as a change of domain, similar to a widening
7456 of a domain abbreviation. This triggered its re-routing code and so it was
7457 trying to route what was effectively the same domain again. This normally
7458 caused routing to fail (because the router wouldn't handle the domain
7459 twice). Now Exim checks for this case specially, and just changes the
7460 casing of the domain that it ultimately uses when it transmits the message
7463 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7466 50. If a filter generated a file delivery with a non-absolute name (possible if
7467 no home directory exists for the router), the forbid_file option was not
7470 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7471 the existing equality matching.
7473 52. Exim was using ints instead of ino_t variables in some places where it was
7474 dealing with inode numbers.
7476 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7477 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7478 called TMPDIR, and if it finds it is different, it changes its value.
7480 54. The smtp_printf() function is now made available to local_scan() so
7481 additional output lines can be written before returning. There is also an
7482 smtp_fflush() function to enable the detection of a dropped connection.
7483 The variables smtp_input and smtp_batched_input are exported to
7486 55. Changed the default runtime configuration: the message "Unknown user"
7487 has been removed from the ACL, and instead placed on the localuser router,
7488 using the cannot_route_message feature. This means that any verification
7489 failures that generate their own messages won't get overridden. Similarly,
7490 the "Unrouteable address" message that was in the ACL for unverifiable
7491 relay addresses has also been removed.
7493 56. Added hosts_avoid_esmtp to the smtp transport.
7495 57. The exicyclog script was not checking for the esoteric option
7496 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7497 will work only if exicyclog is run under the appropriate euid.
7499 58. Following a discussion on the list, the rules by which Exim recognises line
7500 endings on incoming messages have been changed. The -dropcr and drop_cr
7501 options are now no-ops, retained only for backwards compatibility. The
7502 following line terminators are recognized: LF CRLF CR. However, special
7503 processing applies to CR:
7505 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7506 nor a local message in the state where . is a terminator.
7508 (ii) If a bare CR is encountered in a header line, an extra space is added
7509 after the line terminator so as not to end the header. The reasoning
7510 behind this is that bare CRs in header lines are most likely either
7511 to be mistakes, or people trying to play silly games.
7513 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7514 was being incorrectly given as 18 bytes larger than it should have been.
7515 This is a VOB (very old bug).
7517 60. This may never have affected anything current, but just in case it has:
7518 When the local host is found other than at the start of a list of hosts,
7519 the local host, those with the same MX, and any that follow, are discarded.
7520 When the list in question was part of a longer list of hosts, the following
7521 hosts (not currently being processed) were also being discarded. This no
7522 longer happens. I'm not sure if this situation could ever has previously
7525 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7528 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7529 header. This is something that is recommended in a new Internet Draft, and
7530 is something that is documented as being done by Sendmail. There are two
7531 possible values. For messages generated by the autoreply transport, Exim
7534 Auto-Submitted: auto-replied
7536 whereas for all other generated messages (e.g. bounces) it adds
7538 Auto-Submitted: auto-generated
7540 63. The "personal" condition in filters now includes a test for the
7541 Auto-Submitted: header. If it contains the string "auto-" the message it
7542 not considered personal.
7544 64. Added rcpt_include_affixes as a generic transport option.
7546 65. Added queue_only_override (default true).
7548 66. Added the syslog_duplication option.
7550 67. If what should have been the first header line of a message consisted of
7551 a space followed by a colon, Exim was mis-interpreting it as a header line.
7552 It isn't of course - it is syntactically invalid and should therefore be
7553 treated as the start of the message body. The misbehaviour could have
7554 caused a number of strange effects, including loss of data in subsequent
7555 header lines, and spool format errors.
7557 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7558 client host had authenticated. This control can now be exercised by an ACL
7559 for more flexibility.
7561 69. By default, callouts do not happen when testing with -bh. There is now a
7562 variant, -bhc, which does actually run the callout code, including
7563 consulting and updating the callout cache.
7565 70. Added support for saslauthd authentication, courtesy of Alexander
7568 71. If statvfs() failed on the spool or log directories while checking their
7569 size for availability, Exim confusingly gave the error "space shortage".
7570 Furthermore, in debugging mode it crashed with a floating point exception.
7571 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7572 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7573 serious problem, Exim now writes to the main and panic logs when this
7574 happens, with details of the failure. It then refuses to accept the
7575 incoming message, giving the message "spool directory problem" or "log
7576 directory problem" with a 421 code for SMTP messages.
7578 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7579 0, 1, and 2 exist, because some OS complain for execs without them (see
7580 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7581 descriptors. However, the code omitted to check that the open succeeded,
7582 causing mysterious errors if for some reason the permissions on /dev/null
7583 got screwed. Now Exim writes a message to the main and panic logs, and
7584 bombs out if it can't open /dev/null.
7586 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7587 interact so that it is all more flexible. It is supposed to remain
7588 backwards compatible. Also added extra_local_interfaces.
7590 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7591 to bomb out with an assertion failure - to the client this appears as a
7592 connection drop. This problem occurs in the part of the code that was taken
7593 from the Samba project. Fortunately, the assertion is in a very simple
7594 function, so I have fixed this by reproducing the function inline in the
7595 one place where it is called, and arranging for authentication to fail
7596 instead of killing the process with assert().
7598 75. The SPA client code was not working when the server requested OEM rather
7599 than Unicode encoding.
7601 76. Added code to make require_files with a specific uid setting more usable in
7602 the case where statting the file as root fails - usually a non-root-mounted
7603 NFS file system. When this happens and the failure is EACCES, Exim now
7604 forks a subprocess and does the per-uid checking as the relevant uid.
7606 77. Added process_log_path.
7608 78. If log_file_path was not explicitly set, a setting of check_log_space or
7609 check_log_inodes was ignored.
7611 79. If a space check for the spool or log partitions fails, the incident is now
7612 logged. Of course, in the latter case the data may get lost...
7614 80. Added the %p formatting code to string_format() so that it can be used to
7615 print addresses in debug_print(). Adjusted all the address printing in the
7616 debugging in store.c to use %p rather than %d.
7618 81. There was a concern that a line of code in smtp_in.c could overflow a
7619 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7620 initially expressed, the concern was not well-founded, because trailing
7621 spaces are removed early. However, if the trailing spaces were followed by
7622 a NULL, they did not get removed, so the overflow was possible. Two fixes
7625 (a) I re-wrote the offending code in a cleaner fashion.
7626 (b) If an incoming SMTP command contains a NULL character, it is rejected
7629 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7630 runs initgroups(), so that if the Exim user is in any additional groups,
7631 they will be used during message reception.
7637 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob