Local_scan: bump the ABI major version number
[exim.git] / doc / doc-txt / ChangeLog
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.
4
5
6 Exim version 4.93
7 -----------------
8
9 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
10 side, to decode a TLS 1.3 packet capture.
11
12 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
13 Previously the default library behaviour applied, sending two, each in
14 its own TCP segment.
15
16 JH/03 Debug output for ACL now gives the config file name and line number for
17 each verb.
18
19 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
20
21 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
22
23 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
24 buffer overrun for (non-chunking) other transports.
25
26 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
27 TLS1.3, means that a server rejecting a client certificate is not visible
28 to the client until the first read of encrypted data (typically the
29 response to EHLO). Add detection for that case and treat it as a failed
30 TLS connection attempt, so that the normal retry-in-clear can work (if
31 suitably configured).
32
33 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
34 and/or domain. Found and fixed by Jason Betts.
35
36 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
37 configuration). If a CNAME target was not a wellformed name pattern, a
38 crash could result.
39
40 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
41 the OS reports them interleaved with other addresses.
42
43 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
44 used both for input and for a verify callout, both encrypted, SMTP
45 responses being sent by the server could be lost. This resulted in
46 dropped connections and sometimes bounces generated by a peer sending
47 to this system.
48
49 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
50 string. Previously it was possible to cause undefined behaviour in a
51 library routine (usually a crash). Found by "zerons".
52
53 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
54 output.
55
56 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
57 API was removed, so update to use the newer ones.
58
59 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
60 any timeout set, is taking a long time. Previously we would hang on to a
61 rotated logfile "forever" if the input was arriving with long gaps
62 (a previous attempt to fix addressed lack, for a long time, of initial
63 input).
64
65 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
66 shared (NFS) environment. The length of the tempfile name is now
67 4 + 16 ("hdr.$message_exim_id") which might break on file
68 systems which restrict the file name length to lower values.
69 (It was "hdr.$pid".)
70
71 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
72 shared (NFS) environment.
73
74 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
75 did for all versions <4.90). Notably -M, -m, --invert, -I may be
76 affected.
77
78 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
79 on some platforms for bit 31.
80
81 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
82 to changes apparently associated with TLS1.3 handling some of the APIs
83 previously used were either nonfunctional or inappropriate. Strings
84 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
85 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
86 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
87 This affects log line X= elements, the $tls_{in,out}_cipher variables,
88 and the use of specific cipher names in the encrypted= ACL condition.
89
90 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
91
92 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
93 verification result was not updated unless hosts_require_ocsp applied.
94
95 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
96 queue_list_requires_admin set to false, non-admin users were denied the
97 facility.
98
99 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
100 directory-of-certs mode. Previously they were advertised despite the
101 documentation.
102
103 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
104 A single TCP connection by a client will now hold a TLS connection open
105 for multiple message deliveries, by default. Previoud the default was to
106 not do so.
107
108 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
109 default. If built with the facility, DANE will be used. The facility
110 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
111
112 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
113 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
114 must be defined and you must still, unless you define DISABLE_TLS, manage
115 the the include-dir and library-file requirements that go with that
116 choice. Non-TLS builds are still supported.
117
118 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
119 reject under TFO.
120
121 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
122 default. If the platform supports and has the facility enabled, it will
123 be requested on all coneections.
124
125 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
126 controlled by the build-time option SUPPORT_PIPE_CONNECT.
127
128 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
129
130 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
131 success-DSN messages. Previously the From: header was always the default
132 one for these; the option was ignored.
133
134 JH/28 Fix the timeout on smtp response to apply to the whole response.
135 Previously it was reset for every read, so a teergrubing peer sending
136 single bytes within the time limit could extend the connection for a
137 long time. Credit to Qualsys Security Advisory Team for the discovery.
138
139 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
140 delivery address, which leaked information of the results of local
141 forwarding. Change to the original envelope recipient address, per
142 standards.
143
144 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
145 requested. Previously not bounce was generated and a log entry of
146 error ignored was made.
147
148 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
149
150 JH/32 Introduce a general tainting mechanism for values read from the input
151 channel, and values derived from them. Refuse to expand any tainted
152 values, to catch one form of exploit.
153
154 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
155 was unused and the unexpanded text used for the test. Found and
156 fixed by Ruben Jenster.
157
158 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
159 an attempt to use a TLS library read routine dereffed a nul pointer,
160 causing a segfault.
161
162 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
163 them in our smtp response.
164
165 JH/36 Have the general router option retry_use_local_part default to true when
166 any of the restrictive preconditions are set (to anything). Previously it
167 was only for check_local user. The change removes one item of manual
168 configuration which is required for proper retries when a remote router
169 handles a subset of addresses for a domain.
170
171 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
172 link count into consideration.
173
174 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
175 caused the extension of big_buffer, the following lines were ignored.
176
177 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
178 accordance with RFC 2308. Previously there was no expiry, so a longlived
179 receive process (eg. due to ACL delays) versus a short SOA value could
180 surprise.
181
182 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
183
184 JH/39 Promote DMARC support to mainline.
185
186 JH/40 Bug 2452: Add a References: header to DSNs.
187
188 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
189 parameters. The relevant library call is documented as "Deprecated: This
190 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
191 3.6.0, DH parameters are negotiated following RFC7919."
192
193 HS/06 Change the default of dnssec_request_domains to "*"
194
195 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
196 carried on and emitted a BDAT command, even when PIPELINING was not
197 active.
198
199 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
200 buffer was used for the filename, resulting in a trap when tainted
201 arguments (eg. $domain) were used.
202
203 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
204 recommended to avoid a possible server-load attack. The feature can be
205 re-enabled via the openssl_options main cofiguration option.
206
207 JH/45 local_scan API: documented the current smtp_printf() call. This changed
208 for version 4.90 - adding a "more data" boolean to the arguments.
209 Bumped the ABI version number also, this having been missed previously;
210 release versions 4.90 to 4.92.3 inclusive were effectively broken in
211 respect of usage of smtp_printf() by either local_scan code or libraries
212 accessed via the ${dlfunc } expansion item. Both will need coding
213 adjustment for any calls to smtp_printf() to match the new function
214 signature; a FALSE value for the new argument is always safe.
215
216
217 Exim version 4.92
218 -----------------
219
220 JH/01 Remove code calling the customisable local_scan function, unless a new
221 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
222
223 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
224 non-signal-safe functions being used.
225
226 JH/03 Bug 2269: When presented with a received message having a stupidly large
227 number of DKIM-Signature headers, disable DKIM verification to avoid
228 a resource-consumption attack. The limit is set at twenty.
229
230 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
231 report of oldest_pass in ${authres } in consequence, and separate out
232 some descriptions of reasons for verification fail.
233
234 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
235 files in the spool were present and unlocked. A queue-runner could spot
236 them, resulting in a duplicate delivery. Fix that by doing the unlock
237 after the unlink. Investigation by Tim Stewart. Take the opportunity to
238 add more error-checking on spoolfile handling while that code is being
239 messed with.
240
241 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
242 No known attacks, no CVE, this is defensive hardening.
243
244 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
245 a queue-runner could start a delivery while other operations were ongoing.
246 Cutthrough delivery was a common victim, resulting in duplicate delivery.
247 Found and investigated by Tim Stewart. Fix by using the open message data
248 file handle rather than opening another, and not locally closing it (which
249 releases a lock) for that case, while creating the temporary .eml format
250 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
251
252 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
253 $sender_verify_failure/$recipient_verify_failure to "random".
254
255 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
256 legitimate.
257
258 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
259 Previously this would segfault.
260
261 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
262 segfault.
263
264 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
265 like zero, since the resolver should be doing this for us, But we need one
266 as a CNAME but no MX presence gets the CNAME returned; we need to check
267 that doesn't point to an MX to declare it "no MX returned" rather than
268 "error, loop". A new main option is added so the older capability of
269 following some limited number of chain links is maintained.
270
271 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
272
273 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
274 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
275 now-deprecated earlier definitions used only specified the range up to TLS
276 1.2 (in the older-version library docs).
277
278 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
279
280 JH/15 Rework TLS client-side context management. Stop using a global, and
281 explicitly pass a context around. This enables future use of TLS for
282 connections to service-daemons (eg. malware scanning) while a client smtp
283 connection is using TLS; with cutthrough connections this is quite likely.
284
285 JH/16 Fix ARC verification to do AS checks in reverse order.
286
287 JH/17 Support a "tls" option on the ${readsocket } expansion item.
288
289 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
290 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
291 Previously the "utf8" would be re-prepended for every additional message.
292
293 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
294 Previously thery were accepted, resulting in issues when attempting to
295 forward messages to a non-supporting MTA.
296
297 PP/02 Let -n work with printing macros too, not just options.
298
299 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
300 one parent address was copied, and bogus data was used at delivery-logging
301 time. Either a crash (after delivery) or bogus log data could result.
302 Discovery and analysis by Tim Stewart.
303
304 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
305 Previously if the string ended mid-character, we did not insert the
306 promised '?' replacement.
307
308 PP/04 Documentation: current string operators work on bytes, not codepoints.
309
310 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
311 should pack well giving a smaller memory footprint so better caching and
312 therefore performance. Group the declarations where this can't be done so
313 that the byte-sized flag variables are not interspersed among pointer
314 variables, giving a better chance of good packing by the compiler.
315
316 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
317 non-null, to avoid issues with sites running BATV. Previously reports were
318 sent with an empty envelope sender so looked like bounces.
319
320 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
321 The ignore_error flag wasn't being returned from the filter subprocess so
322 was not set for later routers. Investigation and fix by Matthias Kurz.
323
324 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
325 and a msg:complete for the whole, when a message is manually removed using
326 -Mrm. Developement by Matthias Kurz, hacked on by JH.
327
328 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
329 a "Gnu special" function, asprintf() in the DB utility binary builds; I
330 hope that is portable enough.
331
332 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
333 requiring a known-CA anchor certificate; make it now rely entirely on the
334 TLSA as an anchor. Checking the name on the leaf cert against the name
335 on the A-record for the host is still done for TA (but not for EE mode).
336
337 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
338 included in delivery lines for non-proxied connections, when compiled with
339 SUPPORT_SOCKS and running with proxy logging enabled.
340
341 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
342 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
343 move the existing event to fire before the normal logging of message
344 failure so that custom logging is bracketed by normal logging.
345
346 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
347 msg:fail:internal event. Developement by Matthias Kurz.
348
349 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
350 far too small for todays use of crypto signatures stored there. Go all
351 the way to the max DNS message size of 64kB, even though this might be
352 overmuch for IOT constrained device use.
353
354 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
355 copy a string over itself. The library routine is documented as not
356 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
357
358 JH/32 For main options check_spool_space and check_inode_space, where the
359 platform supports 64b integers, support more than the previous 2^31 kB
360 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
361 the previous G, M, k.
362
363 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
364 $authenticated_fail_id variable on authentication failure. Previously
365 it was unset.
366
367 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
368 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
369 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
370 GNUTLS_SEC_PARAM_MEDIUM.
371
372 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
373 side. Previously we would continue as if no SNI had been received.
374
375 JH/36 Harden the handling of string-lists. When a list consisted of a sole
376 "<" character, which should be a list-separator specification, we walked
377 off past the nul-terimation.
378
379 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
380 causes) even when the retry time is not yet met. Previously they were
381 not, meaning that when (say) an account was over-quota and temp-rejecting,
382 and multiple senders' messages were queued, only one sender would get
383 notified on each configured delay_warning cycle.
384
385 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
386
387 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
388 cipher-suites, an error can be left on the stack even for a succeeding
389 accept; this results in impossible error messages when a later operation
390 actually does fail.
391
392 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
393 return error codes indicating retry. Under TLS1.3 this becomes required.
394
395 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
396 it only wrote the new authenticators, resulting in a lack of tracking of
397 peer changes of ESMTP extensions until the next cache flush.
398
399 JH/41 Fix the loop reading a message header line to check for integer overflow,
400 and more-often against header_maxsize. Previously a crafted message could
401 induce a crash of the recive process; now the message is cleanly rejected.
402
403 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
404 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
405
406
407 Exim version 4.91
408 -----------------
409
410 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
411 When redis_servers is set to a list of > 1 element, and the Redis servers
412 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
413 case of MOVED into a DEFER case instead, thus moving the query onto the
414 next server in the list. For a cluster of N elements, all N servers must
415 be defined in redis_servers.
416
417 GF/02 Catch and remove uninitialized value warning in exiqsumm
418 Check for existence of @ARGV before looking at $ARGV[0]
419
420 JH/01 Replace the store_release() internal interface with store_newblock(),
421 which internalises the check required to safely use the old one, plus
422 the allocate and data copy operations duplicated in both (!) of the
423 extant use locations.
424
425 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
426 modifier. This matches the restriction on the commandline.
427
428 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
429 Previously only the last row was returned.
430
431 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
432 we assumed that tags in the header were well-formed, and parsed the
433 element content after inspecting only the first char of the tag.
434 Assumptions at that stage could crash the receive process on malformed
435 input.
436
437 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
438 While running the DKIM ACL we operate on the Permanent memory pool so that
439 variables created with "set" persist to the DATA ACL. Also (at any time)
440 DNS lookups that fail create cache records using the Permanent pool. But
441 expansions release any allocations made on the current pool - so a dnsdb
442 lookup expansion done in the DKIM ACL releases the memory used for the
443 DNS negative-cache, and bad things result. Solution is to switch to the
444 Main pool for expansions.
445 While we're in that code, add checks on the DNS cache during store_reset,
446 active in the testsuite.
447 Problem spotted, and debugging aided, by Wolfgang Breyha.
448
449 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
450 When none of the hosts presented to a transport match an already-open
451 connection, close it and proceed with the list. Previously we would
452 queue the message. Spotted by Lena with Yahoo, probably involving
453 round-robin DNS.
454
455 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
456 Previously a spurious "250 OK id=" response was appended to the proper
457 failure response.
458
459 JH/08 The "support for" informational output now, which built with Content
460 Scanning support, has a line for the malware scanner interfaces compiled
461 in. Interface can be individually included or not at build time.
462
463 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
464 by the template makefile "src/EDITME". The "STREAM" support for an older
465 ClamAV interface method is removed.
466
467 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
468 rows affected is given instead).
469
470 JH/11 The runtime Berkeley DB library version is now additionally output by
471 "exim -d -bV". Previously only the compile-time version was shown.
472
473 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
474 SMTP connection. Previously, when one had more receipients than the
475 first, an abortive onward connection was made. Move to full support for
476 multiple onward connections in sequence, handling cutthrough connection
477 for all multi-message initiating connections.
478
479 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
480 routers. Previously, a multi-recipient message would fail to match the
481 onward-connection opened for the first recipient, and cause its closure.
482
483 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
484 a timeout on read on a GnuTLS initiating connection, resulting in the
485 initiating connection being dropped. This mattered most when the callout
486 was marked defer_ok. Fix to keep the two timeout-detection methods
487 separate.
488
489 JH/15 Relax results from ACL control request to enable cutthrough, in
490 unsupported situations, from error to silently (except under debug)
491 ignoring. This covers use with PRDR, frozen messages, queue-only and
492 fake-reject.
493
494 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
495
496 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
497 metadata, resulting in a crash in free().
498
499 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
500 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
501 Broken also in d185889f4, with init system revamp.
502
503 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
504 Previously we abruptly closed the connection after reading a malware-
505 found indication; now we go on to read the "scan ok" response line,
506 and send a quit.
507
508 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
509 ACL. Previously, a crash would result.
510
511 JH/19 Speed up macro lookups during configuration file read, by skipping non-
512 macro text after a replacement (previously it was only once per line) and
513 by skipping builtin macros when searching for an uppercase lead character.
514
515 JH/20 DANE support moved from Experimental to mainline. The Makefile control
516 for the build is renamed.
517
518 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
519 was allocated for every new TLS startup, meaning one per message. Fix
520 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
521
522 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
523 reported the original. Fix to report (as far as possible) the ACL
524 result replacing the original.
525
526 JH/23 Fix memory leak during multi-message connections using STARTTLS under
527 OpenSSL. Certificate information is loaded for every new TLS startup,
528 and the resources needed to be freed.
529
530 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
531
532 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
533 was not propagated.
534
535 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
536 DATA response info to the (existing) per-recipient response info for
537 the "C=" log element. It can have useful tracking info from the
538 destination system. Patch from Simon Arlott.
539
540 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
541 length value. Previously this would segfault.
542
543 HS/02 Support Avast multiline protoocol, this allows passing flags to
544 newer versions of the scanner.
545
546 JH/28 Ensure that variables possibly set during message acceptance are marked
547 dead before release of memory in the daemon loop. This stops complaints
548 about them when the debug_store option is enabled. Discovered specifically
549 for sender_rate_period, but applies to a whole set of variables.
550 Do the same for the queue-runner and queue-list loops, for variables set
551 from spool message files. Do the same for the SMTP per-message loop, for
552 certain variables indirectly set in ACL operations.
553
554 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
555 as a multi-recipient message from a mailinglist manager). The coding had
556 an arbitrary cutoff number of characters while checking for more input;
557 enforced by writing a NUL into the buffer. This corrupted long / fast
558 input. The problem was exposed more widely when more pipelineing of SMTP
559 responses was introduced, and one Exim system was feeding another.
560 The symptom is log complaints of SMTP syntax error (NUL chars) on the
561 receiving system, and refused recipients seen by the sending system
562 (propating to people being dropped from mailing lists).
563 Discovered and pinpointed by David Carter.
564
565 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
566 replaced by the ${authresults } expansion.
567
568 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
569
570 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
571 allows proper process termination in container environments.
572
573 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
574 Previously the "final dot" had a newline after it; ensure it is CR,LF.
575
576 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
577 and "err_perm", deprecated since 4.83 when the RFC-defined words
578 "temperror" and "permerror" were introduced.
579
580 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
581 transport-filters or DKIM-signing. The restriction was lost in the
582 consolidation of verify-callout and delivery SMTP handling.
583 Extend the restriction to also cover ARC-signing.
584
585 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
586 in defer=pass mode supply a 450 to the initiator. Previously the message
587 would be spooled.
588
589 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
590 tls_require_ciphers is used as before.
591
592 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
593 "pass_unscanned". Only tmpfails from the scanner are written to
594 the paniclog, as they may require admin intervention (permission
595 denied, license issues). Other scanner errors (like decompression
596 bombs) do not cause a paniclog entry.
597
598 JH/36 Fix reinitialisation of DKIM logging variable between messages.
599 Previously it was possible to log spurious information in receive log
600 lines.
601
602 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
603 triggered odd behaviour from Outlook Express clients.
604
605 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
606 suffix list.
607
608 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
609 since the IETF WG has not yet settled on that versus the original
610 "bare" representation.
611
612 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
613 Previously the millisecond value corrupted the output.
614 Fix also for syslog_pid=no and log_selector +pid, for which the pid
615 corrupted the output.
616
617
618 Exim version 4.90
619 -----------------
620
621 JH/01 Rework error string handling in TLS interface so that the caller in
622 more cases is responsible for logging. This permits library-sourced
623 string to be attached to addresses during delivery, and collapses
624 pairs of long lines into single ones.
625
626 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
627 during configuration. Wildcards are allowed and expanded.
628
629 JH/02 Rework error string handling in DKIM to pass more info back to callers.
630 This permits better logging.
631
632 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
633 do not close it down and have the child transport start it up again on
634 the passed-on TCP connection. Instead, proxy the child (and any
635 subsequent ones) for TLS via a unix-domain socket channel. Logging is
636 affected: the continued delivery log lines do not have any DNSSEC, TLS
637 Certificate or OCSP information. TLS cipher information is still logged.
638
639 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
640 identical IP addresses on different listening ports. Will also affect
641 "exiwhat" output.
642
643 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
644 add noisy ifdef guards to special-case this sillyness.
645 Patch from Bernd Kuhls.
646
647 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
648 than 255 are no longer allowed.
649
650 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
651 Disable the session-cache too, which might reduce our load. Since we
652 currrectly use a new context for every connection, both as server and
653 client, there is no benefit for these.
654 GnuTLS appears to not support tickets server-side by default (we don't
655 call gnutls_session_ticket_enable_server()) but client side is enabled
656 by default on recent versions (3.1.3 +) unless the PFS priority string
657 is used (3.2.4 +).
658
659 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
660 <https://reproducible-builds.org/specs/source-date-epoch/>.
661
662 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
663 the check for any unsuccessful recipients did not notice the limit, and
664 erroneously found still-pending ones.
665
666 JH/08 Pipeline CHUNKING command and data together, on kernels that support
667 MSG_MORE. Only in-clear (not on TLS connections).
668
669 JH/09 Avoid using a temporary file during transport using dkim. Unless a
670 transport-filter is involved we can buffer the headers in memory for
671 creating the signature, and read the spool data file once for the
672 signature and again for transmission.
673
674 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
675 4.77 as the kernel support then wasn't solid, having issues in 64bit
676 mode. Now, it's been long enough. Add support for FreeBSD also.
677
678 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
679 case where the routing stage had gathered several addresses to send to
680 a host before calling the transport for the first, we previously failed
681 to close down TLS in the old transport process before passing the TCP
682 connection to the new process. The new one sent a STARTTLS command
683 which naturally failed, giving a failed delivery and bloating the retry
684 database. Investigation and fix prototype from Wolfgang Breyha.
685
686 JH/12 Fix check on SMTP command input synchronisation. Previously there were
687 false-negatives in the check that the sender had not preempted a response
688 or prompt from Exim (running as a server), due to that code's lack of
689 awareness of the SMTP input buffering.
690
691 PP/04 Add commandline_checks_require_admin option.
692 Exim drops privileges sanely, various checks such as -be aren't a
693 security problem, as long as you trust local users with access to their
694 own account. When invoked by services which pass untrusted data to
695 Exim, this might be an issue. Set this option in main configuration
696 AND make fixes to the calling application, such as using `--` to stop
697 processing options.
698
699 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
700 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
701 responses to those, into a single TLS record each way (this usually means
702 a single packet). As a side issue, smtp_enforce_sync now works on TLS
703 connections.
704
705 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
706 affects you only if you're dancing at the edge of the param size limits.
707 If you are, and this message makes sense to you, then: raise the
708 configured limit or use OpenSSL 1.1. Nothing we can do for older
709 versions.
710
711 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
712 cmdline element to get the documented default one. Previously it was
713 inaccessible.
714
715 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
716 are unsuable for non-message-specific reasons - eg. connection timeout,
717 banner-time rejection.
718
719 JH/16 Fix logging of delivery remote port, when specified by router, under
720 callout/hold.
721
722 PP/06 Repair manualroute's ability to take options in any order, even if one
723 is the name of a transport.
724 Fixes bug 2140.
725
726 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
727
728 JH/17 Change the list-building routines interface to use the expanding-string
729 triplet model, for better allocation and copying behaviour.
730
731 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
732 Previously it was constructed the first time a possibly-matching string
733 was met in the configuration file input during startup; now it is done
734 during compilation.
735
736 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
737 compatible one, to avoid the (poorly documented) possibility of a config
738 file in the working directory redirecting the DB files, possibly correpting
739 some existing file. CVE-2017-10140 assigned for BDB.
740
741 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
742 cache-hot. Previously, although the result was properly cached, the
743 initial verify call returned a defer.
744
745 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
746 the main verify for receipient in uncached-mode.
747
748 JH/22 Retire historical build files to an "unsupported" subdir. These are
749 defined as "ones for which we have no current evidence of testing".
750
751 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
752 if present. Previously it was ignored.
753
754 JH/24 Start using specified-initialisers in C structure init coding. This is
755 a C99 feature (it's 2017, so now considered safe).
756
757 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
758 if was a fixed-sized field and bitmask ops via macros; it is now more
759 extensible.
760
761 PP/07 GitHub PR 56: Apply MariaDB build fix.
762 Patch provided by Jaroslav Škarvada.
763
764 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
765 during Coverity cleanups [4.87 JH/47]
766 Diagnosis and fix provided by Michael Fischer v. Mollard.
767
768 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
769 the right size to place the terminating semicolon on its own folded
770 line, the header hash was calculated to an incorrect value thanks to
771 the (relaxed) space the fold became.
772
773 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
774 and confused the parent.
775
776 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
777 which could crash as a result. This could lead to undeliverable messages.
778
779 JH/28 Logging: "next input sent too soon" now shows where input was truncated
780 for log purposes.
781
782 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
783 matters on fast-turnover and PID-randomising systems, which were getting
784 out-of-order delivery.
785
786 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
787 a possibly-overlapping copy. The symptom was that "Remote host closed
788 connection in response to HELO" was logged instead of the actual 4xx
789 error for the HELO.
790
791 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
792 Previously only that bufferd was discarded, resulting in SYMTP command
793 desynchronisation.
794
795 JH/32 DKIM: when a message has multiple signatures matching an identity given
796 in dkim_verify_signers, run the dkim acl once for each. Previously only
797 one run was done. Bug 2189.
798
799 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
800 "panic the current process" to "deliberately defer". The panic log is
801 still written with the problem list name; the mail and reject logs now
802 get a temp-reject line for the message that was being handled, saying
803 something like "domains check lookup or other defer". The SMTP 451
804 message is still "Temporary local problem".
805
806 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
807 A crafted sequence of BDAT commands could result in in-use memory beeing
808 freed. CVE-2017-16943.
809
810 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
811 from SMTP input. Previously it was always done; now only done for DATA
812 and not BDAT commands. CVE-2017-16944.
813
814 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
815 to the message (such as an overlong header line). Previously this was
816 not done and we did not exit BDAT mode. Followon from the previous item
817 though a different problem.
818
819
820 Exim version 4.89
821 -----------------
822
823 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
824 than -2003 did; needs libidn2 in addition to libidn.
825
826 JH/02 The path option on a pipe transport is now expanded before use.
827
828 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
829 Patch provided by "Björn", documentation fix added too.
830
831 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
832 missing a wire-to-host endian conversion.
833
834 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
835 close after a BDAT command line could be taken as a following command,
836 giving a synch failure. Fix by only checking for synch immediately
837 before acknowledging the chunk.
838
839 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
840 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
841 macro. Patches provided by Josh Soref.
842
843 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
844 Previously we did not; the RFC seems ambiguous and VRFY is not listed
845 by IANA as a service extension. However, John Klensin suggests that we
846 should.
847
848 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
849 the dkim code may be unix-mode line endings rather than smtp wire-format
850 CRLF, so prepend a CR to any bare LF.
851
852 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
853 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
854
855 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
856 the first were themselves being wrongly included in the feed into dkim
857 processing; with most chunk sizes in use this resulted in an incorrect
858 body hash calculated value.
859
860 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
861 DKIM signature block, for verification. Although advised against by
862 standards it is specifically not ruled illegal.
863
864 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
865
866 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
867 missing a body hash (the bh= tag).
868
869 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
870 It seems that HAProxy sends the Proxy Protocol information in clear and
871 only then does a TLS startup, so do the same.
872
873 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
874 TCP connections (such as for Spamd) unless the daemon successfully set
875 Fast Open mode on its listening sockets. This fixes breakage seen on
876 too-old kernels or those not configured for Fast Open, at the cost of
877 requiring both directions being enabled for TFO, and TFO never being used
878 by non-daemon-related Exim processes.
879
880 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
881 endings, at least on the first header line. Try to canonify any that get
882 past that check, despite the cost.
883
884 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
885 now limited to an arbitrary five deep, while parsing addresses with the
886 strip_excess_angle_brackets option enabled.
887
888 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
889 instead leave the unprompted TLS handshake in socket buffer for the
890 TLS library to consume.
891
892 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
893
894 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
895
896 JH/16 Drop variables when they go out of scope. Memory management drops a whole
897 region in one operation, for speed, and this leaves assigned pointers
898 dangling. Add checks run only under the testsuite which checks all
899 variables at a store-reset and panics on a dangling pointer; add code
900 explicitly nulling out all the variables discovered. Fixes one known
901 bug: a transport crash, where a dangling pointer for $sending_ip_address
902 originally assigned in a verify callout, is re-used.
903
904 PP/06 Drop '.' from @INC in various Perl scripts.
905
906 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
907
908 PP/08 Reduce a number of compilation warnings under clang; building with
909 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
910 should be warning-free.
911
912 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
913
914 HS/01 Fix portability problems introduced by PP/08 for platforms where
915 realloc(NULL) is not equivalent to malloc() [SunOS et al].
916
917 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
918 chunk. This allows us to accept broken chunked messages. We need a more
919 general solution here.
920
921 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
922 already-broken messages in the queue.
923
924 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
925
926 JH/19 Fix reference counting bug in routing-generated-address tracking.
927
928
929 Exim version 4.88
930 -----------------
931
932 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
933 supports it and a size is available (ie. the sending peer gave us one).
934
935 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
936 years of being deprecated). The replacements are the ACLs
937 acl_smtp_mime and acl_not_smtp_mime.
938
939 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
940 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
941 or even an in-clear connection were permitted. Now, if the host lookup
942 was dnssec and dane was requested then the host is only used if the
943 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
944 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
945 if one fails this test.
946 This means that a poorly-configured remote DNS will make it incommunicado;
947 but it protects against a DNS-interception attack on it.
948
949 JH/04 Bug 1810: make continued-use of an open smtp transport connection
950 non-noisy when a race steals the message being considered.
951
952 JH/05 If main configuration option tls_certificate is unset, generate a
953 self-signed certificate for inbound TLS connections.
954
955 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
956 in rewrites and routers.
957
958 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
959 and logged a warning sing 4.83; now they are a configuration file error.
960
961 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
962 (lacking @domain). Apply the same qualification processing as RCPT.
963
964 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
965
966 JH/10 Support ${sha256:} applied to a string (as well as the previous
967 certificate).
968
969 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
970 a cutthrough deliver is pending, as we always want to make a connection.
971 This also avoids re-routing the message when later placing the cutthrough
972 connection after a verify cache hit.
973 Do not update it with the verify result either.
974
975 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
976 when routing results in more than one destination address.
977
978 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
979 signing (which inhibits the cutthrough capability). Previously only
980 the presence of an option was tested; now an expansion evaluating as
981 empty is permissible (obviously it should depend only on data available
982 when the cutthrough connection is made).
983
984 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
985 the relevant preceding SMTP command did not note the pipelining mode.
986
987 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
988 Previously they were not counted.
989
990 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
991 as one having no matching records. Previously we deferred the message
992 that needed the lookup.
993
994 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
995 distinguished as "(=".
996
997 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
998 for missing MX records. Previously it only worked for missing A records.
999
1000 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1001
1002 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1003 after the data-go-ahead and data-ack. Patch from Jason Betts.
1004
1005 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1006 even for a "none" policy. Patch from Tony Meyer.
1007
1008 JH/22 Fix continued use of a connection for further deliveries. If a port was
1009 specified by a router, it must also match for the delivery to be
1010 compatible.
1011
1012 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1013 When one of the recipients of a message was unsuitable for the connection
1014 (has no matching addresses), we lost track of needing to mark it
1015 deferred. As a result mail would be lost.
1016
1017 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1018
1019 JH/25 Decoding ACL controls is now done using a binary search; the source code
1020 takes up less space and should be simpler to maintain. Merge the ACL
1021 condition decode tables also, with similar effect.
1022
1023 JH/26 Fix problem with one_time used on a redirect router which returned the
1024 parent address unchanged. A retry would see the parent address marked as
1025 delivered, so not attempt the (identical) child. As a result mail would
1026 be lost.
1027
1028 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1029 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1030 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1031 itself :(
1032
1033 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1034 Main config options check_{log,spool}_{inodes,space} are now
1035 100 inodes, 10MB unless set otherwise in the configuration.
1036
1037 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1038 Previously it only applied to the main-section connection policy
1039 options.
1040
1041 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1042
1043 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1044 by me. Added RFC7919 DH primes as an alternative.
1045
1046 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1047 are not in the system include path.
1048
1049 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1050 GnuTLS, when a session startup failed (eg because the client disconnected)
1051 Exim did stdio operations after fclose. This was exposed by a recent
1052 change which nulled out the file handle after the fclose.
1053
1054 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1055 signed directly by the cert-signing cert, rather than an intermediate
1056 OCSP-signing cert. This is the model used by LetsEncrypt.
1057
1058 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1059
1060 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1061 an incoming connection.
1062
1063 HS/02 Bug 1802: Do not half-close the connection after sending a request
1064 to rspamd.
1065
1066 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1067 fallback to "prime256v1".
1068
1069 JH/34 SECURITY: Use proper copy of DATA command in error message.
1070 Could leak key material. Remotely exploitable. CVE-2016-9963.
1071
1072
1073 Exim version 4.87
1074 -----------------
1075
1076 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1077 and 3.4.4 - once the server is enabled to respond to an OCSP request
1078 it does even when not requested, resulting in a stapling non-aware
1079 client dropping the TLS connection.
1080
1081 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1082 support variable-length bit vectors. No functional change.
1083
1084 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1085 The I= interface field on outgoing lines is now after the H= remote
1086 host field, same as incoming lines. There is a separate
1087 outgoing_interface log selector which allows you to disable the
1088 outgoing I= field.
1089
1090 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1091 If not running log_selector +smtp_connection the mainlog would be held
1092 open indefinitely after a "too many connections" event, including to a
1093 deleted file after a log rotate. Leave the per net connection logging
1094 leaving it open for efficiency as that will be quickly detected by the
1095 check on the next write.
1096
1097 HS/01 Bug 1671: Fix post transport crash.
1098 Processing the wait-<transport> messages could crash the delivery
1099 process if the message IDs didn't exist for some reason. When
1100 using 'split_spool_directory=yes' the construction of the spool
1101 file name failed already, exposing the same netto behaviour.
1102
1103 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1104 mime_regex ACL conditions.
1105
1106 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1107 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1108 to HELO, local diagnostic string.
1109
1110 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1111 log line to debug. Even when configured with a tls authenticator many
1112 client connections are expected to not authenticate in this way, so
1113 an authenticate fail is not an error.
1114
1115 HS/02 Add the Exim version string to the process info. This way exiwhat
1116 gives some more detail about the running daemon.
1117
1118 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1119 matter for fast-change records such as DNSBLs.
1120
1121 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1122 retry record, even if constant. There may be multiple transports with
1123 different interface settings and the retry behaviour needs to be kept
1124 distinct.
1125
1126 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1127
1128 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1129
1130 JH/10 Bug 840: fix log_defer_output option of pipe transport
1131
1132 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1133 hosts_randomize. This matters a lot when combined with mua_wrapper.
1134
1135 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1136 ${quote_pgsql:<string>} operator.
1137
1138 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1139
1140 JH/14 Change header file name for freeradius-client. Relevant if compiling
1141 with Radius support; from the Gentoo tree and checked under Fedora.
1142
1143 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1144
1145 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1146 option transport_filter, meaning no filtering.
1147
1148 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1149
1150 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1151 defaults to "*" (all hosts). The variable is now available when not built
1152 with TLS, default unset, mainly to enable keeping the testsuite sane.
1153 If a server certificate is not supplied (via tls_certificate) an error is
1154 logged, and clients will find TLS connections fail on startup. Presumably
1155 they will retry in-clear.
1156 Packagers of Exim are strongly encouraged to create a server certificate
1157 at installation time.
1158
1159 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1160 with the $config_file variable.
1161
1162 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1163 in transport context, after the attempt, and per-recipient. The latter type
1164 is per host attempted. The event data is the error message, and the errno
1165 information encodes the lookup type (A vs. MX) used for the (first) host,
1166 and the trailing two digits of the smtp 4xx response.
1167
1168 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1169 to write to mainlog (or rejectlog, paniclog) in the window between file
1170 creation and permissions/ownership being changed. Particularly affects
1171 installations where exicyclog is run as root, rather than exim user;
1172 result is that the running daemon panics and dies.
1173
1174 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1175
1176 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1177 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1178 "pri" and "weight". Note that the previous implicit priority given by the
1179 list order is no longer honoured.
1180
1181 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1182 for DKIM processing.
1183
1184 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1185 by defining SUPPORT_SOCKS.
1186
1187 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1188 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1189 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1190 variables are renamed to proxy_{local,external}_{address,port}.
1191
1192 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1193 for a build by defining SUPPORT_I18N
1194
1195 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1196 of the query string, and make ${quote_redis:} do that quoting.
1197
1198 JH/29 Move Events support from Experimental to mainline, enabled by default
1199 and removable for a build by defining DISABLE_EVENT.
1200
1201 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1202
1203 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1204 cached by the daemon.
1205
1206 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1207 by defining LOOKUP_REDIS. The libhiredis library is required.
1208
1209 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1210 keys are given for lookup.
1211
1212 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1213 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1214 only supported when built with TLS support. The PolarSSL SHA routines
1215 are still used when the TLS library is too old for convenient support.
1216
1217 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1218 openssl_options), for security. OpenSSL forces this from version 1.1.0
1219 server-side so match that on older versions.
1220
1221 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1222 allocation for $value could be released as the expansion processing
1223 concluded, but leaving the global pointer active for it.
1224
1225 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1226 and to use the domains and local_parts ACL conditions.
1227
1228 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1229 incorrectly not doubled on cutthrough transmission, hence seen as a
1230 body-termination at the receiving system - resulting in truncated mails.
1231 Commonly the sender saw a TCP-level error, and retransmitted the message
1232 via the normal store-and-forward channel. This could result in duplicates
1233 received - but deduplicating mailstores were liable to retain only the
1234 initial truncated version.
1235
1236 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1237
1238 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1239
1240 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1241 we're in there, support oversigning also; bug 1309.
1242
1243 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1244
1245 HS/04 Add support for keep_environment and add_environment options.
1246
1247 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1248 either intentional arithmetic overflow during PRNG, or testing config-
1249 induced overflows.
1250
1251 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1252 delivery resulted in actual delivery. Cancel cutthrough before DATA
1253 stage.
1254
1255 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1256 rejects a recipient: pass the reject to the originator.
1257
1258 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1259 Many were false-positives and ignorable, but it's worth fixing the
1260 former class.
1261
1262 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1263 for the new environment-manipulation done at startup. Move the routines
1264 from being local to tls.c to being global via the os.c file.
1265
1266 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1267 an extract embedded as result-arg for a map, the first arg for extract
1268 is unavailable so we cannot tell if this is a numbered or keyed
1269 extraction. Accept either.
1270
1271
1272 Exim version 4.86
1273 -----------------
1274
1275 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1276 expanded.
1277
1278 JH/02 The smtp transport option "multi_domain" is now expanded.
1279
1280 JH/03 The smtp transport now requests PRDR by default, if the server offers
1281 it.
1282
1283 JH/04 Certificate name checking on server certificates, when exim is a client,
1284 is now done by default. The transport option tls_verify_cert_hostnames
1285 can be used to disable this per-host. The build option
1286 EXPERIMENTAL_CERTNAMES is withdrawn.
1287
1288 JH/05 The value of the tls_verify_certificates smtp transport and main options
1289 default to the word "system" to access the system default CA bundle.
1290 For GnuTLS, only version 3.0.20 or later.
1291
1292 JH/06 Verification of the server certificate for a TLS connection is now tried
1293 (but not required) by default. The verification status is now logged by
1294 default, for both outbound TLS and client-certificate supplying inbound
1295 TLS connections
1296
1297 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1298 sites use this now.
1299
1300 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1301 Status Notification (bounce) messages are now MIME format per RFC 3464.
1302 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1303 under the control of the dsn_advertise_hosts option, and routers may
1304 have a dsn_lasthop option.
1305
1306 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1307 default, modifiable by a malware= option. The list separator for
1308 the options can now be changed in the usual way. Bug 68.
1309
1310 JH/10 The smtp_receive_timeout main option is now expanded before use.
1311
1312 JH/11 The incoming_interface log option now also enables logging of the
1313 local interface on delivery outgoing connections.
1314
1315 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1316 if the interface and destination host and port all match.
1317
1318 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1319 /defer_ok option.
1320
1321 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1322 Patch from Andrew Lewis.
1323
1324 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1325 now supports optional time-restrictions, weighting, and priority
1326 modifiers per server. Patch originally by <rommer@active.by>.
1327
1328 JH/16 The spamd_address main option now supports a mixed list of local
1329 and remote servers. Remote servers can be IPv6 addresses, and
1330 specify a port-range.
1331
1332 JH/17 Bug 68: The spamd_address main option now supports an optional
1333 timeout value per server.
1334
1335 JH/18 Bug 1581: Router and transport options headers_add/remove can
1336 now have the list separator specified.
1337
1338 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1339 option values.
1340
1341 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1342 under OpenSSL.
1343
1344 JH/21 Support for the A6 type of dns record is withdrawn.
1345
1346 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1347 rather than the verbs used.
1348
1349 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1350 from 255 to 1024 chars.
1351
1352 JH/24 Verification callouts now attempt to use TLS by default.
1353
1354 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1355 are generic router options now. The defaults didn't change.
1356
1357 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1358 Original patch from Alexander Shikoff, worked over by JH.
1359
1360 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1361 files if ZCAT_COMMAND is not executable.
1362
1363 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1364
1365 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1366
1367 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1368 Normally benign, it bites when the pair was led to by a CNAME;
1369 modern usage is to not canonicalize the domain to a CNAME target
1370 (and we were inconsistent anyway for A-only vs AAAA+A).
1371
1372 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1373
1374 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1375 when evaluating $sender_host_dnssec.
1376
1377 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1378 $sender_helo_dnssec variable.
1379
1380 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1381
1382 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1383
1384 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1385
1386 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1387 documented as working, but never had. Support all but $spam_report.
1388
1389 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1390 added for tls authenticator.
1391
1392 HS/03 Add perl_taintmode main config option
1393
1394
1395 Exim version 4.85
1396 -----------------
1397
1398 TL/01 When running the test suite, the README says that variables such as
1399 no_msglog_check are global and can be placed anywhere in a specific
1400 test's script, however it was observed that placement needed to be near
1401 the beginning for it to behave that way. Changed the runtest perl
1402 script to read through the entire script once to detect and set these
1403 variables, reset to the beginning of the script, and then run through
1404 the script parsing/test process like normal.
1405
1406 TL/02 The BSD's have an arc4random API. One of the functions to induce
1407 adding randomness was arc4random_stir(), but it has been removed in
1408 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1409 function when detected.
1410
1411 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1412 cause callback expansion.
1413
1414 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1415 syntax errors in an expansion can be treated as a string instead of
1416 logging or causing an error, due to the internal use of bool_lax
1417 instead of bool when processing it.
1418
1419 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1420 server certificates when making smtp deliveries.
1421
1422 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1423
1424 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1425
1426 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1427
1428 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1429 Merged patch from Sebastian Wiedenroth.
1430
1431 JH/05 Fix results-pipe from transport process. Several recipients, combined
1432 with certificate use, exposed issues where response data items split
1433 over buffer boundaries were not parsed properly. This eventually
1434 resulted in duplicates being sent. This issue only became common enough
1435 to notice due to the introduction of connection certificate information,
1436 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1437
1438 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1439 size buffer was used, resulting in syntax errors when an expansion
1440 exceeded it.
1441
1442 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1443 version 3.3.6 or later.
1444
1445 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1446 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1447 both become "event_action", the variables become $event_name, $event_data
1448 and $event_defer_errno. There is a new variable $verify_mode, usable in
1449 routers, transports and related events. The tls:cert event is now also
1450 raised for inbound connections, if the main configuration event_action
1451 option is defined.
1452
1453 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1454 early OCSP support, but no stapling (appears to be less than 1.0.0).
1455
1456 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1457 server certificate names available under the smtp transport option
1458 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1459 matches.
1460
1461 JH/10 Time-related extraction expansions from certificates now use the main
1462 option "timezone" setting for output formatting, and are consistent
1463 between OpenSSL and GnuTLS compilations. Bug 1541.
1464
1465 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1466 encoded parameter in the incoming message. Bug 1558.
1467
1468 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1469 include certificate info, eximon was claiming there were spoolfile
1470 syntax errors.
1471
1472 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1473
1474 JH/14 Log delivery-related information more consistently, using the sequence
1475 "H=<name> [<ip>]" wherever possible.
1476
1477 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1478 are problematic for Debian distribution, omit them from the release
1479 tarball.
1480
1481 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1482
1483 JH/16 Fix string representation of time values on 64bit time_t architectures.
1484 Bug 1561.
1485
1486 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1487 output list separator was used.
1488
1489
1490 Exim version 4.84
1491 -----------------
1492 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1493 checkers that were complaining about end of non-void function with no
1494 return.
1495
1496 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1497 This was a regression introduced in 4.83 by another bugfix.
1498
1499 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1500
1501 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1502 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1503
1504
1505 Exim version 4.83
1506 -----------------
1507
1508 TF/01 Correctly close the server side of TLS when forking for delivery.
1509
1510 When a message was received over SMTP with TLS, Exim failed to clear up
1511 the incoming connection properly after forking off the child process to
1512 deliver the message. In some situations the subsequent outgoing
1513 delivery connection happened to have the same fd number as the incoming
1514 connection previously had. Exim would try to use TLS and fail, logging
1515 a "Bad file descriptor" error.
1516
1517 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1518 utilities have not been installed.
1519
1520 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1521 temporary space as the ACL may create new global variables.
1522
1523 TL/01 LDAP support uses per connection or global context settings, depending
1524 upon the detected version of the libraries at build time.
1525
1526 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1527 to extract and use the src ip:port in logging and expansions as if it
1528 were a direct connection from the outside internet. PPv2 support was
1529 updated based on HAProxy spec change in May 2014.
1530
1531 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1532
1533 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1534 Properly escape header and check for NULL return.
1535
1536 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1537 not dns_use_dnssec.
1538
1539 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1540
1541 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1542 characters in header names, implemented as a verify condition.
1543 Contributed by Michael Fischer v. Mollard.
1544
1545 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1546 results permerror and temperror. Previous values are deprecated but
1547 still accepted. In a future release, err_perm and err_temp will be
1548 completely removed, which will be a backward incompatibility if the
1549 ACL tests for either of these two old results. Patch contributed by
1550 user bes-internal on the mailing list.
1551
1552 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1553
1554 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1555 selectors, in both main and reject logs.
1556
1557 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1558 failed delivery.
1559
1560 JH/07 Add malware type "sock" for talking to simple daemon.
1561
1562 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1563
1564 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1565 routers/transports under cutthrough routing.
1566
1567 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1568 numbers. Touch up "bool" conditional to keep the same definition.
1569
1570 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1571
1572 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1573
1574 JH/12 Expand items in router/transport headers_add or headers_remove lists
1575 individually rather than the list as a whole. Bug 1452.
1576
1577 Required for reasonable handling of multiple headers_ options when
1578 they may be empty; requires that headers_remove items with embedded
1579 colons must have them doubled (or the list-separator changed).
1580
1581 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1582 view the policy declared in the DMARC record. Currently, $dmarc_status
1583 is a combined value of both the record presence and the result of the
1584 analysis.
1585
1586 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1587
1588 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1589 dnslookup router and the smtp transport (applying to the forward
1590 lookup).
1591
1592 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1593 of ldap servers used for a specific lookup. Patch provided by Heiko
1594 Schlichting.
1595
1596 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1597 New variable $lookup_dnssec_authenticated for observability.
1598
1599 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1600 Patch submitted by Lars Timman.
1601
1602 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1603
1604 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1605 Requires trusted mode and valid format message id, aborts otherwise.
1606 Patch contributed by Heiko Schlichting.
1607
1608 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1609 certextract with support for various fields. Bug 1358.
1610
1611 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1612 is requested by default, modifiable by smtp transport option
1613 hosts_request_ocsp.
1614
1615 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1616 operate on certificate variables to give certificate fingerprints
1617 Also new ${sha256:cert_variable}.
1618
1619 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1620
1621 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1622 Christian Aistleitner.
1623
1624 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1625
1626 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1627 file. Patch from Wolfgang Breyha.
1628
1629 JH/25 Expand the coverage of the delivery $host and $host_address to
1630 client authenticators run in verify callout. Bug 1476.
1631
1632 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1633 align with daemon_smtp_ports. Bug 72.
1634
1635 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1636 support and error reporting did not work properly.
1637
1638 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1639 and is readable. Patch from Andrew Colin Kissa.
1640
1641 TL/14 Enhance documentation of ${run expansion and how it parses the
1642 commandline after expansion, particularly in the case when an
1643 unquoted variable expansion results in an empty value.
1644
1645 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1646
1647 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1648 by renaming away from it. Addresses GH issue 15, reported by
1649 Jasper Wallace.
1650
1651 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1652
1653 TL/15 SECURITY: prevent double expansion in math comparison functions
1654 (can expand unsanitized data). Not remotely exploitable.
1655 CVE-2014-2972
1656
1657
1658 Exim version 4.82
1659 -----------------
1660
1661 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1662
1663 PP/02 Make -n do something, by making it not do something.
1664 When combined with -bP, the name of an option is not output.
1665
1666 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1667 by GnuTLS.
1668
1669 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1670 $sender_host_name and config options to manage this, and basic check
1671 routines.
1672
1673 PP/05 DSCP support for outbound connections and control modifier for inbound.
1674
1675 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1676 (Only plugin which currently uses this is kerberos4, which nobody should
1677 be using, but we should make it available and other future plugins might
1678 conceivably use it, even though it would break NAT; stuff *should* be
1679 using channel bindings instead).
1680
1681 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1682 name; added for Sendmail compatibility; requires admin caller.
1683 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1684 just ignore it); requires trusted caller.
1685 Also parse but ignore: -Ac -Am -X<logfile>
1686 Bugzilla 1117.
1687
1688 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1689
1690 TL/02 Add +smtp_confirmation as a default logging option.
1691
1692 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1693 Patch by Magnus Holmgren from 2007-02-20.
1694
1695 TL/04 Bugzilla 1281 - Spec typo.
1696 Bugzilla 1283 - Spec typo.
1697 Bugzilla 1290 - Spec grammar fixes.
1698
1699 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1700
1701 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1702
1703 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1704 mailing list by by Dmitry Isaikin.
1705
1706 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1707
1708 JH/02 Support "G" suffix to numbers in ${if comparisons.
1709
1710 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1711
1712 NM/01 Bugzilla 1197 - Spec typo
1713 Bugzilla 1196 - Spec examples corrections
1714
1715 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1716
1717 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1718 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1719 function.
1720
1721 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1722 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1723
1724 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1725 "acl {{name}{arg}...}", and optional args on acl condition
1726 "acl = name arg..."
1727
1728 JH/05 Permit multiple router/transport headers_add/remove lines.
1729
1730 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1731
1732 JH/07 Avoid using a waiting database for a single-message-only transport.
1733 Performance patch from Paul Fisher. Bugzilla 1262.
1734
1735 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1736 Bugzilla 884.
1737
1738 JH/09 Add $headers_added variable, with content from use of ACL modifier
1739 add_header (but not yet added to the message). Bugzilla 199.
1740
1741 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1742 Pulled from Bugzilla 817 by Wolfgang Breyha.
1743
1744 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1745 CVE-2012-5671
1746 (nb: this is the same fix as in Exim 4.80.1)
1747
1748 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1749 authenticators.
1750
1751 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1752 for control.
1753
1754 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1755
1756 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1757 advertise SMTP AUTH mechanism to us, instead of a generic
1758 protocol violation error. Also, make Exim more robust to bad
1759 data from the Dovecot auth socket.
1760
1761 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1762
1763 When a queue runner is handling a message, Exim first routes the
1764 recipient addresses, during which it prunes them based on the retry
1765 hints database. After that it attempts to deliver the message to
1766 any remaining recipients. It then updates the hints database using
1767 the retry rules.
1768
1769 So if a recipient address works intermittently, it can get repeatedly
1770 deferred at routing time. The retry hints record remains fresh so the
1771 address never reaches the final cutoff time.
1772
1773 This is a fairly common occurrence when a user is bumping up against
1774 their storage quota. Exim had some logic in its local delivery code
1775 to deal with this. However it did not apply to per-recipient defers
1776 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1777
1778 This change adds a proper retry rule check during routing so that the
1779 final cutoff time is checked against the message's age. We only do
1780 this check if there is an address retry record and there is not a
1781 domain retry record; this implies that previous attempts to handle
1782 the address had the retry_use_local_parts option turned on. We use
1783 this as an approximation for the destination being like a local
1784 delivery, as in LMTP.
1785
1786 I suspect this new check makes the old local delivery cutoff check
1787 redundant, but I have not verified this so I left the code in place.
1788
1789 TF/02 Correct gecos expansion when From: is a prefix of the username.
1790
1791 Test 0254 submits a message to Exim with the header
1792
1793 Resent-From: f
1794
1795 When I ran the test suite under the user fanf2, Exim expanded
1796 the header to contain my full name, whereas it should have added
1797 a Resent-Sender: header. It erroneously treats any prefix of the
1798 username as equal to the username.
1799
1800 This change corrects that bug.
1801
1802 GF/01 DCC debug and logging tidyup
1803 Error conditions log to paniclog rather than rejectlog.
1804 Debug lines prefixed by "DCC: " to remove any ambiguity.
1805
1806 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1807
1808 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1809 Bug spotted by Jeremy Harris; was flawed since initial commit.
1810 Would have resulted in OCSP responses post-SNI triggering an Exim
1811 NULL dereference and crash.
1812
1813 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1814
1815 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1816 Bug detection, analysis and fix by Samuel Thibault.
1817 Bugzilla 1331, Debian bug #698092.
1818
1819 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1820
1821 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1822 Server implementation by Todd Lyons, client by JH.
1823 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1824 config variable "prdr_enable" controls whether the server
1825 advertises the facility. If the client requests PRDR a new
1826 acl_data_smtp_prdr ACL is called once for each recipient, after
1827 the body content is received and before the acl_smtp_data ACL.
1828 The client is controlled by both of: a hosts_try_prdr option
1829 on the smtp transport, and the server advertisement.
1830 Default client logging of deliveries and rejections involving
1831 PRDR are flagged with the string "PRDR".
1832
1833 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1834 fclose(). Diagnosis by Todd Lyons.
1835
1836 PP/17 Update configure.default to handle IPv6 localhost better.
1837 Patch by Alain Williams (plus minor tweaks).
1838 Bugzilla 880.
1839
1840 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1841 This is now consistent with GnuTLS, and is now documented: the
1842 previous undocumented portable approach to treating the option as
1843 unset was to force an expansion failure. That still works, and
1844 an empty string is now equivalent.
1845
1846 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1847 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1848 not performing validation itself.
1849
1850 PP/20 Added force_command boolean option to pipe transport.
1851 Patch from Nick Koston, of cPanel Inc.
1852
1853 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1854 Bugzilla 321, 823.
1855
1856 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1857
1858 PP/21 Fix eximon continuous updating with timestamped log-files.
1859 Broken in a format-string cleanup in 4.80, missed when I repaired the
1860 other false fix of the same issue.
1861 Report and fix from Heiko Schlichting.
1862 Bugzilla 1363.
1863
1864 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1865 Report from Prashanth Katuri.
1866
1867 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1868 It's SecureTransport, so affects any MacOS clients which use the
1869 system-integrated TLS libraries, including email clients.
1870
1871 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1872 using a MIME ACL for non-SMTP local injection.
1873 Report and assistance in diagnosis by Warren Baker.
1874
1875 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1876
1877 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1878
1879 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1880 last id that failed so it may be referenced in subsequent ACL's.
1881
1882 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1883 Alexander Miroch.
1884
1885 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1886 ldap library initialization, allowing self-signed CA's to be
1887 used. Also properly sets require_cert option later in code by
1888 using NULL (global ldap config) instead of ldap handle (per
1889 session). Bug diagnosis and testing by alxgomz.
1890
1891 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1892 the src/util/ subdirectory.
1893
1894 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1895 renamed to Transport Post Delivery Action by Jeremy Harris, as
1896 EXPERIMENTAL_TPDA.
1897
1898 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1899 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1900 redis_servers = needs to be configured which will be used by the redis
1901 lookup. Patch from Warren Baker, of The Packet Hub.
1902
1903 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1904
1905 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1906 hostname or reverse DNS when processing a host list. Used suggestions
1907 from multiple comments on this bug.
1908
1909 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1910
1911 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1912 Missed a few lines, added it to make the runtest require no keyboard
1913 interaction.
1914
1915 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1916 contains upper case chars. Make router use caseful_local_part.
1917
1918 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1919 support when GnuTLS has been built with p11-kit.
1920
1921
1922 Exim version 4.80.1
1923 -------------------
1924
1925 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1926 CVE-2012-5671
1927 This, or similar/improved, will also be change PP/11 of 4.82.
1928
1929
1930 Exim version 4.80
1931 -----------------
1932
1933 PP/01 Handle short writes when writing local log-files.
1934 In practice, only affects FreeBSD (8 onwards).
1935 Bugzilla 1053, with thanks to Dmitry Isaikin.
1936
1937 NM/01 Bugzilla 949 - Documentation tweak
1938
1939 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1940 improved.
1941
1942 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1943
1944 PP/02 Implemented gsasl authenticator.
1945
1946 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1947
1948 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1949 `pkg-config foo` for cflags/libs.
1950
1951 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1952 with rest of GSASL and with heimdal_gssapi.
1953
1954 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1955 `pkg-config foo` for cflags/libs for the TLS implementation.
1956
1957 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1958 properties get this fed in as external SSF. A number of robustness
1959 and debugging improvements to the cyrus_sasl authenticator.
1960
1961 PP/08 cyrus_sasl server now expands the server_realm option.
1962
1963 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1964 Patch by Jeremy Harris.
1965
1966 PP/10 Added dbmjz lookup type.
1967
1968 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1969
1970 PP/12 MAIL args handles TAB as well as SP, for better interop with
1971 non-compliant senders.
1972 Analysis and variant patch by Todd Lyons.
1973
1974 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1975 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1976 Patch from Dirk Mueller <dmueller@suse.com>
1977
1978 PP/13 tls_peerdn now print-escaped for spool files.
1979 Observed some $tls_peerdn in wild which contained \n, which resulted
1980 in spool file corruption.
1981
1982 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1983 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1984 or write after TLS renegotiation, which otherwise led to messages
1985 "Got SSL error 2".
1986
1987 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1988 as a tracking header (ie: a signed header comes before the signature).
1989 Patch from Wolfgang Breyha.
1990
1991 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1992 comma-sep list; embedded commas doubled.
1993
1994 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1995
1996 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1997 diagnostics.
1998 Report and patch from Dmitry Banschikov.
1999
2000 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2001 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2002 failures. We appear to now support TLS1.1+ with Exim.
2003
2004 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2005 lets Exim select keys and certificates based upon TLS SNI from client.
2006 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2007 before an outbound SMTP session. New log_selector, +tls_sni.
2008
2009 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2010 NULL dereference. Report and patch from Alun Jones.
2011
2012 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2013 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2014 Not seeing resolver debug output on NetBSD, but suspect this is a
2015 resolver implementation change.
2016
2017 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2018 Left warnings. Added "eximon gdb" invocation mode.
2019
2020 PP/21 Defaulting "accept_8bitmime" to true, not false.
2021
2022 PP/22 Added -bw for inetd wait mode support.
2023
2024 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2025 locate the relevant includes and libraries. Made this the default.
2026
2027 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2028 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2029
2030 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2031 This may cause build issues on older platforms.
2032
2033 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2034 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2035 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2036 Added SNI support via GnuTLS too.
2037 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2038
2039 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2040
2041 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2042 Applied second patch from Janne, implementing suggestion to default
2043 multiple-strings-in-record handling to match SPF spec.
2044
2045 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2046
2047 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2048 read-only, out of scope).
2049 Patch from Wolfgang Breyha, report from Stuart Northfield.
2050
2051 PP/29 Fix three issues highlighted by clang analyser static analysis.
2052 Only crash-plausible issue would require the Cambridge-specific
2053 iplookup router and a misconfiguration.
2054 Report from Marcin Mirosław.
2055
2056 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2057
2058 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2059 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2060 As part of this, removing so much warning spew let me fix some minor
2061 real issues in debug logging.
2062
2063 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2064 assignment on my part. Fixed.
2065
2066 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2067 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2068 Janne Snabb (who went above and beyond: thank you).
2069
2070 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2071 string otherwise requires a connection and a bunch more work and it's
2072 relatively easy to get wrong. Should also expose TLS library linkage
2073 problems.
2074
2075 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2076 64-bit ${eval} (JH/03).
2077
2078 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2079 GNU libc to support some of the 64-bit stuff, should not lead to
2080 conflicts. Defined before os.h is pulled in, so if a given platform
2081 needs to override this, it can.
2082
2083 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2084 protection layer was required, which is not implemented.
2085 Bugzilla 1254, patch from Wolfgang Breyha.
2086
2087 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2088 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2089 tls_dhparam take prime identifiers. Also unbreak combination of
2090 OpenSSL+DH_params+TLSSNI.
2091
2092 PP/39 Disable SSLv2 by default in OpenSSL support.
2093
2094
2095 Exim version 4.77
2096 -----------------
2097
2098 PP/01 Solaris build fix for Oracle's LDAP libraries.
2099 Bugzilla 1109, patch from Stephen Usher.
2100
2101 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2102
2103 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2104 whitespace trailer
2105
2106 TF/02 Fix a couple more cases where we did not log the error message
2107 when unlink() failed. See also change 4.74-TF/03.
2108
2109 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2110 lock up or crash if it happened to be inside a call to libc when it
2111 got a SIGUSR1 from exiwhat.
2112
2113 The SIGUSR1 handler appends the current process status to the process
2114 log which is later printed by exiwhat. It used to use the general
2115 purpose logging code to do this, but several functions it calls are
2116 not safe for signals.
2117
2118 The new output code in the SIGUSR1 handler is specific to the process
2119 log, and simple enough that it's easy to inspect for signal safety.
2120 Removing some special cases also simplifies the general logging code.
2121 Removing the spurious timestamps from the process log simplifies
2122 exiwhat.
2123
2124 TF/04 Improved ratelimit ACL condition.
2125
2126 The /noupdate option has been deprecated in favour of /readonly which
2127 has clearer semantics. The /leaky, /strict, and /readonly update modes
2128 are mutually exclusive. The update mode is no longer included in the
2129 database key; it just determines when the database is updated. (This
2130 means that when you upgrade Exim will forget old rate measurements.)
2131
2132 Exim now checks that the per_* options are used with an update mode that
2133 makes sense for the current ACL. For example, when Exim is processing a
2134 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2135 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2136 must specify per_mail/readonly. If you omit the update mode it defaults to
2137 /leaky where that makes sense (as before) or /readonly where required.
2138
2139 The /noupdate option is now undocumented but still supported for
2140 backwards compatibility. It is equivalent to /readonly except that in
2141 ACLs where /readonly is required you may specify /leaky/noupdate or
2142 /strict/noupdate which are treated the same as /readonly.
2143
2144 A useful new feature is the /count= option. This is a generalization
2145 of the per_byte option, so that you can measure the throughput of other
2146 aggregate values. For example, the per_byte option is now equivalent
2147 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2148
2149 The per_rcpt option has been generalized using the /count= mechanism
2150 (though it's more complicated than the per_byte equivalence). When it is
2151 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2152 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2153 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2154 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2155 Note that using per_rcpt with a non-readonly update mode in more than
2156 one ACL will cause the recipients to be double-counted. (The per_mail
2157 and per_byte options don't have this problem.)
2158
2159 The handling of very low rates has changed slightly. If the computed rate
2160 is less than the event's count (usually one) then this event is the first
2161 after a long gap. In this case the rate is set to the same as this event's
2162 count, so that the first message of a spam run is counted properly.
2163
2164 The major new feature is a mechanism for counting the rate of unique
2165 events. The new per_addr option counts the number of different
2166 recipients that someone has sent messages to in the last time period. It
2167 behaves like per_rcpt if all the recipient addresses are different, but
2168 duplicate recipient addresses do not increase the measured rate. Like
2169 the /count= option this is a general mechanism, so the per_addr option
2170 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2171 example, measure the rate that a client uses different sender addresses
2172 with the options per_mail/unique=$sender_address. There are further
2173 details in the main documentation.
2174
2175 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2176
2177 TF/06 Removed a few PCRE remnants.
2178
2179 TF/07 Automatically extract Exim's version number from tags in the git
2180 repository when doing development or release builds.
2181
2182 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2183 Bugzilla 879. Patch from Paul Fisher.
2184
2185 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2186 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2187 Bugzilla 97.
2188
2189 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2190
2191 PP/05 Variable $av_failed, true if the AV scanner deferred.
2192 Bugzilla 1078. Patch from John Horne.
2193
2194 PP/06 Stop make process more reliably on build failure.
2195 Bugzilla 1087. Patch from Heiko Schlittermann.
2196
2197 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2198 Bugzilla 1089. Patch from Heiko Schlittermann.
2199
2200 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2201 Bugzilla 1131. Patch from Holger Weiß.
2202
2203 PP/09 Handle IPv6 addresses with SPF.
2204 Bugzilla 860. Patch from Wolfgang Breyha.
2205
2206 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2207 Bugzilla 1156.
2208 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2209 Bugzilla 1095.
2210
2211 PP/11 match_* no longer expand right-hand-side by default.
2212 New compile-time build option, EXPAND_LISTMATCH_RHS.
2213 New expansion conditions, "inlist", "inlisti".
2214
2215 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2216
2217 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2218
2219 PP/14 fix log_write() format string regression from TF/03.
2220 Bugzilla 1152. Patch from Dmitry Isaikin.
2221
2222
2223 Exim version 4.76
2224 -----------------
2225
2226 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2227
2228 PP/02 Harmonised TLS library version reporting; only show if debugging.
2229 Layout now matches that introduced for other libraries in 4.74 PP/03.
2230
2231 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2232
2233 PP/04 New "dns_use_edns0" global option.
2234
2235 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2236 Bugzilla 1098.
2237
2238 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2239 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2240
2241 TK/01 Updated PolarSSL code to 0.14.2.
2242 Bugzilla 1097. Patch from Andreas Metzler.
2243
2244 PP/07 Catch divide-by-zero in ${eval:...}.
2245 Fixes bugzilla 1102.
2246
2247 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2248 Bugzilla 1104.
2249
2250 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2251 format-string attack -- SECURITY: remote arbitrary code execution.
2252
2253 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2254 time unintentionally subject to list matching rules, letting the header
2255 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2256 arbitrary string expansion). This allowed for information disclosure.
2257
2258 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2259 INT_MIN/-1 -- value coerced to INT_MAX.
2260
2261
2262 Exim version 4.75
2263 -----------------
2264
2265 NM/01 Workaround for PCRE version dependency in version reporting
2266 Bugzilla 1073
2267
2268 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2269 This fixes portability to compilers other than gcc, notably
2270 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2271
2272 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2273 makefiles for portability to HP-UX and POSIX correctness.
2274
2275 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2276 Also via indented variable definition in the Makefile.
2277 (Debugging by Oliver Heesakkers).
2278
2279 PP/02 Restore caching of spamd results with expanded spamd_address.
2280 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2281
2282 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2283 Improves build reliability. Fix from: Frank Elsner
2284
2285 NM/02 Fix wide character breakage in the rfc2047 coding
2286 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2287
2288 NM/03 Allow underscore in dnslist lookups
2289 Fixes bug 1026. Patch from Graeme Fowler
2290
2291 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2292 Code patches from Adam Ciarcinski of NetBSD.
2293
2294 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2295 Fixes bug 943.
2296
2297 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2298 is logged, to avoid truncation. Patch from John Horne.
2299
2300 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2301 Patch from Jakob Hirsch.
2302
2303 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2304 SQL string expansion failure details.
2305 Patch from Andrey Oktyabrski.
2306
2307 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2308 Patch from Simon Arlott.
2309
2310 PP/09 New lookups functionality failed to compile on old gcc which rejects
2311 extern declarations in function scope.
2312 Patch from Oliver Fleischmann
2313
2314 PP/10 Use sig_atomic_t for flags set from signal handlers.
2315 Check getgroups() return and improve debugging.
2316 Fixed developed for diagnosis in bug 927 (which turned out to be
2317 a kernel bug).
2318
2319 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2320 Patch from Mark Zealey.
2321
2322 PP/12 Bugzilla 1056: Improved spamd server selection.
2323 Patch from Mark Zealey.
2324
2325 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2326 Based on patch from Heiko Schlittermann.
2327
2328 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2329 Patch from Uwe Doering, sign-off by Michael Haardt.
2330
2331 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2332 variable declaration deep within a block. Bug and patch from
2333 Dennis Davis.
2334
2335 PP/15 lookups-Makefile IRIX compatibility coercion.
2336
2337 PP/16 Make DISABLE_DKIM build knob functional.
2338
2339 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2340 Patch by Simon Arlott
2341
2342 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2343 variable argument macros. Our copy now differs from upstream.
2344
2345
2346 Exim version 4.74
2347 -----------------
2348
2349 TF/01 Failure to get a lock on a hints database can have serious
2350 consequences so log it to the panic log.
2351
2352 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2353 controlled using the smtp_confirmation log selector.
2354
2355 TF/03 Include the error message when we fail to unlink a spool file.
2356
2357 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2358 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2359 for maintaining out-of-tree patches for some time.
2360
2361 PP/01 Bugzilla 139: Documentation and portability issues.
2362 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2363 Handle per-OS dynamic-module compilation flags.
2364
2365 PP/02 Let /dev/null have normal permissions.
2366 The 4.73 fixes were a little too stringent and complained about the
2367 permissions on /dev/null. Exempt it from some checks.
2368 Reported by Andreas M. Kirchwitz.
2369
2370 PP/03 Report version information for many libraries, including
2371 Exim version information for dynamically loaded libraries. Created
2372 version.h, now support a version extension string for distributors
2373 who patch heavily. Dynamic module ABI change.
2374
2375 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2376 privilege escalation vulnerability whereby the Exim run-time user
2377 can cause root to append content of the attacker's choosing to
2378 arbitrary files.
2379
2380 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2381 (Wolfgang Breyha)
2382
2383 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2384 If dropping privileges for untrusted macros, we disabled normal logging
2385 on the basis that it would fail; for the Exim run-time user, this is not
2386 the case, and it resulted in successful deliveries going unlogged.
2387 Fixed. Reported by Andreas Metzler.
2388
2389
2390 Exim version 4.73
2391 -----------------
2392
2393 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2394 only prepend for the Resent-* case. Fixes regression introduced in
2395 Exim 4.70 by NM/22 for Bugzilla 607.
2396
2397 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2398 increasing numbers of administrators be bitten by this.
2399
2400 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2401
2402 PP/03 Bugzilla 994: added openssl_options main configuration option.
2403
2404 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2405
2406 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2407
2408 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2409
2410 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2411 without a peer certificate, leading to a segfault because of an
2412 assumption that peers always have certificates. Be a little more
2413 paranoid. Problem reported by Martin Tscholak.
2414
2415 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2416 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2417 NB: ClamAV planning to remove STREAM in "middle of 2010".
2418 CL also introduces -bmalware, various -d+acl logging additions and
2419 more caution in buffer sizes.
2420
2421 PP/09 Implemented reverse_ip expansion operator.
2422
2423 PP/10 Bugzilla 937: provide a "debug" ACL control.
2424
2425 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2426
2427 PP/12 Bugzilla 973: Implement --version.
2428
2429 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2430
2431 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2432
2433 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2434
2435 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2436 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2437 ignore trailing whitespace.
2438
2439 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2440
2441 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2442 "exim" to be used
2443
2444 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2445 Notification from Dr Andrew Aitchison.
2446
2447 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2448 ExtendedDetectionInfo response format.
2449 Notification from John Horne.
2450
2451 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2452 compatible.
2453
2454 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2455 XSL and documented dependency on system catalogs, with examples of how
2456 it normally works.
2457
2458 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2459 access.
2460
2461 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2462 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2463 configuration file which is writeable by the Exim user or group.
2464
2465 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2466 of configuration files to cover files specified with the -C option if
2467 they are going to be used with root privileges, not just the default
2468 configuration file.
2469
2470 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2471 option (effectively making it always true).
2472
2473 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2474 files to be used while preserving root privileges.
2475
2476 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2477 that rogue child processes cannot use them.
2478
2479 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2480 run-time user, instead of root.
2481
2482 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2483 Exim run-time user without dropping privileges.
2484
2485 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2486 result string, instead of calling string_vformat() twice with the same
2487 arguments.
2488
2489 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2490 for other users. Others should always drop root privileges if they use
2491 -C on the command line, even for a whitelisted configure file.
2492
2493 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2494
2495 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2496
2497
2498 Exim version 4.72
2499 -----------------
2500
2501 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2502 $data_path, and $header_path variables; fixed documentation bugs and
2503 typos
2504
2505 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2506 exipick to access non-standard spools, including the "frozen" queue
2507 (Finput)
2508
2509 NM/01 Bugzilla 965: Support mysql stored procedures.
2510 Patch from Alain Williams
2511
2512 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2513
2514 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2515 Patch from Andreas Metzler
2516
2517 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2518 Patch from Kirill Miazine
2519
2520 NM/05 Bugzilla 671: Added umask to procmail example.
2521
2522 JJ/03 installed exipick 20100323.0, fixing doc bug
2523
2524 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2525 directory. Notification and patch from Dan Rosenberg.
2526
2527 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2528
2529 TK/02 Improve log output when DKIM signing operation fails.
2530
2531 MH/01 Treat the transport option dkim_domain as a colon separated
2532 list, not as a single string, and sign the message with each element,
2533 omitting multiple occurences of the same signer.
2534
2535 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2536 Bugzilla 985, 986. Patch by Simon Arlott
2537
2538 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2539 Patch by Simon Arlott
2540
2541 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2542 MBX locking. Notification from Dan Rosenberg.
2543
2544
2545 Exim version 4.71
2546 -----------------
2547
2548 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2549
2550 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2551
2552 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2553
2554 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2555
2556 NM/04 Bugzilla 915: Flag broken perl installation during build.
2557
2558
2559 Exim version 4.70
2560 -----------------
2561
2562 TK/01 Added patch by Johannes Berg that expands the main option
2563 "spamd_address" if it starts with a dollar sign.
2564
2565 TK/02 Write list of recipients to X-Envelope-Sender header when building
2566 the mbox-format spool file for content scanning (suggested by Jakob
2567 Hirsch).
2568
2569 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2570 (http://www.dcc-servers.net/) support via dccifd. Activated by
2571 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2572
2573 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2574 by Mark Daniel Reidel <mr@df.eu>.
2575
2576 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2577 When building exim an external PCRE library is now needed -
2578 PCRE is a system library on the majority of modern systems.
2579 See entry on PCRE_LIBS in EDITME file.
2580
2581 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2582 conversation. Added nologin parameter to request.
2583 Patch contributed by Kirill Miazine.
2584
2585 TF/01 Do not log submission mode rewrites if they do not change the address.
2586
2587 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2588
2589 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2590 log files in place. Contributed by Roberto Lima.
2591
2592 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2593
2594 TF/03 Bugzilla 615: When checking the local_parts router precondition
2595 after a local_part_suffix or local_part_prefix option, Exim now
2596 does not use the address's named list lookup cache, since this
2597 contains cached lookups for the whole local part.
2598
2599 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2600 Robert Millan. Documentation is in experimental-spec.txt.
2601
2602 TF/04 Bugzilla 668: Fix parallel build (make -j).
2603
2604 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2605
2606 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2607 Patch provided by Jan Srzednicki.
2608
2609 TF/05 Leading white space used to be stripped from $spam_report which
2610 wrecked the formatting. Now it is preserved.
2611
2612 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2613 that they are available at delivery time.
2614
2615 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2616
2617 TF/08 TLS error reporting now respects the incoming_interface and
2618 incoming_port log selectors.
2619
2620 TF/09 Produce a more useful error message if an SMTP transport's hosts
2621 setting expands to an empty string.
2622
2623 NM/06 Bugzilla 744: EXPN did not work under TLS.
2624 Patch provided by Phil Pennock.
2625
2626 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2627 Patch provided by Richard Godbee.
2628
2629 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2630 acl_smtp_notquit, added index entry.
2631
2632 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2633 Patch provided by Eugene Bujak.
2634
2635 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2636 accept(). Patch provided by Maxim Dounin.
2637
2638 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2639 Patch provided by Phil Pennock.
2640
2641 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2642
2643 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2644 Patch provided by Brad "anomie" Jorsch.
2645
2646 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2647 Patch provided by Dean Brooks.
2648
2649 TK/05 Add native DKIM support (does not depend on external libraries).
2650
2651 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2652 Patch provided by Graeme Fowler.
2653
2654 NM/16 Bugzilla 851: Documentation example syntax fix.
2655
2656 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2657
2658 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2659 lsearch.
2660
2661 NM/19 Bugzilla 745: TLS version reporting.
2662 Patch provided by Phil Pennock.
2663
2664 NM/20 Bugzilla 167: bool: condition support.
2665 Patch provided by Phil Pennock.
2666
2667 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2668 clients. Patch provided by Phil Pennock.
2669
2670 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2671 Patch provided by Brad "anomie" Jorsch.
2672
2673 NM/23 Bugzilla 687: Fix misparses in eximstats.
2674 Patch provided by Heiko Schlittermann.
2675
2676 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2677 Patch provided by Heiko Schlittermann.
2678
2679 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2680 plus update to original patch.
2681
2682 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2683
2684 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2685 Patch provided by David Brownlee.
2686
2687 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2688
2689 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2690
2691 NM/30 Bugzilla 888: TLS documentation bugfixes.
2692
2693 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2694
2695 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2696 Unlike the original bugzilla I have changed all shell scripts in src tree.
2697
2698 NM/33 Bugzilla 898: Transport filter timeout fix.
2699 Patch by Todd Rinaldo.
2700
2701 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2702 Patch by Serge Demonchaux.
2703
2704 NM/35 Bugzilla 39: Base64 decode bug fixes.
2705 Patch by Jakob Hirsch.
2706
2707 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2708
2709 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2710
2711 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2712
2713 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2714
2715
2716 Exim version 4.69
2717 -----------------
2718
2719 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2720 ALT-N's libdkim that I have put here:
2721 http://duncanthrax.net/exim-experimental/
2722
2723 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2724 were called 'true' and it seems that C99 defines that as a reserved
2725 keyword to be used with 'bool' variable types. That means you could
2726 not include C99-style headers which use bools without triggering
2727 build errors in sieve.c.
2728
2729 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2730 as mailq or other aliases. Changed the --help handling significantly
2731 to do whats expected. exim_usage() emits usage/help information.
2732
2733 SC/01 Added the -bylocaldomain option to eximstats.
2734
2735 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2736
2737 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2738
2739 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2740
2741
2742 Exim version 4.68
2743 -----------------
2744
2745 PH/01 Another patch from the Sieve maintainer.
2746
2747 PH/02 When an IPv6 address is converted to a string for single-key lookup
2748 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2749 dots are used instead of colons so that keys in lsearch files need not
2750 contain colons. This was done some time before quoting was made available
2751 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2752 (notated using the quote facility) so as to distinguish them from IPv4
2753 keys. This meant that lookups for IP addresses in host lists did not work
2754 for iplsearch lookups.
2755
2756 This has been fixed by arranging for IPv6 addresses to be expressed with
2757 colons if the lookup type is iplsearch. This is not incompatible, because
2758 previously such lookups could never work.
2759
2760 The situation is now rather anomalous, since one *can* have colons in
2761 ordinary lsearch keys. However, making the change in all cases is
2762 incompatible and would probably break a number of configurations.
2763
2764 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2765 version.
2766
2767 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2768 conversion specification without a maximum field width, thereby enabling
2769 a rogue spamd server to cause a buffer overflow. While nobody in their
2770 right mind would setup Exim to query an untrusted spamd server, an
2771 attacker that gains access to a server running spamd could potentially
2772 exploit this vulnerability to run arbitrary code as the Exim user.
2773
2774 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2775 $primary_hostname instead of what libspf2 thinks the hosts name is.
2776
2777 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2778 a directory entry by the name of the lookup key. Previously, if a
2779 symlink pointed to a non-existing file or a file in a directory that
2780 Exim lacked permissions to read, a lookup for a key matching that
2781 symlink would fail. Now it is enough that a matching directory entry
2782 exists, symlink or not. (Bugzilla 503.)
2783
2784 PH/03 The body_linecount and body_zerocount variables are now exported in the
2785 local_scan API.
2786
2787 PH/04 Added the $dnslist_matched variable.
2788
2789 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2790 This means they are set thereafter only if the connection becomes
2791 encrypted.
2792
2793 PH/06 Added the client_condition to authenticators so that some can be skipped
2794 by clients under certain conditions.
2795
2796 PH/07 The error message for a badly-placed control=no_multiline_responses left
2797 "_responses" off the end of the name.
2798
2799 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2800
2801 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2802 (without spaces) instead of just copying the configuration text.
2803
2804 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2805
2806 PH/11 Added $max_received_linelength.
2807
2808 PH/12 Added +ignore_defer and +include_defer to host lists.
2809
2810 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2811 way in which PCRE > 7.0 is built.
2812
2813 PH/14 Implemented queue_only_load_latch.
2814
2815 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2816 MAIL command. The effect was to mangle the value on 64-bit systems.
2817
2818 PH/16 Another patch from the Sieve maintainer.
2819
2820 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2821
2822 PH/18 If a system quota error occurred while trying to create the file for
2823 a maildir delivery, the message "Mailbox is full" was not appended to the
2824 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2825 only to a quota excession during the actual writing of the file.
2826
2827 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2828 characters?) which causes problems in log lines. The DN values are now
2829 passed through string_printing() before being added to log lines.
2830
2831 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2832 and InterBase are left for another time.)
2833
2834 PH/21 Added message_body_newlines option.
2835
2836 PH/22 Guard against possible overflow in moan_check_errorcopy().
2837
2838 PH/23 POSIX allows open() to be a macro; guard against that.
2839
2840 PH/24 If the recipient of an error message contained an @ in the local part
2841 (suitably quoted, of course), incorrect values were put in $domain and
2842 $local_part during the evaluation of errors_copy.
2843
2844
2845 Exim version 4.67
2846 -----------------
2847
2848 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2849 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2850 Jan Srzednicki.
2851
2852 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2853 issue a MAIL command.
2854
2855 PH/02 In an ACL statement such as
2856
2857 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2858
2859 if a client was not listed at all, or was listed with a value other than
2860 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2861 the condition was not true (as it should be), so access was not denied.
2862 The bug was that the ! inversion was incorrectly passed on to the second
2863 item. This has been fixed.
2864
2865 PH/03 Added additional dnslists conditions == and =& which are different from
2866 = and & when the dns lookup returns more than one IP address.
2867
2868 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2869 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2870
2871 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2872 FSYNC, which compiles an option called disable_fsync that allows for
2873 bypassing fsync(). The documentation is heavily laced with warnings.
2874
2875 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2876
2877 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2878 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2879 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2880 including adding "make clean"; (3) Added -fPIC when compiling the test
2881 dynamically loaded module, to get rid of a warning.
2882
2883 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2884 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2885 = 0s. The bug is otherwise harmless.
2886
2887 PH/07 There was a bug in the dovecot authenticator such that the value of
2888 $auth1 could be overwritten, and so not correctly preserved, after a
2889 successful authentication. This usually meant that the value preserved by
2890 the server_setid option was incorrect.
2891
2892 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2893
2894 PH/09 Installed PCRE release 7.0.
2895
2896 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2897 run for batched SMTP input. It is now run at the start of every message
2898 in the batch. While fixing this I discovered that the process information
2899 (output by running exiwhat) was not always getting set for -bs and -bS
2900 input. This is fixed, and it now also says "batched" for BSMTP.
2901
2902 PH/11 Added control=no_pipelining.
2903
2904 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2905 patch, slightly modified), and move the expansion of helo_data till after
2906 the connection is made in the smtp transport (so it can use these
2907 values).
2908
2909 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2910
2911 PH/14 Added log_selector = +pid.
2912
2913 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2914
2915 PH/16 Add ${if forany and ${if forall.
2916
2917 PH/17 Added dsn_from option to vary the From: line in DSNs.
2918
2919 PH/18 Flush SMTP output before performing a callout, unless control =
2920 no_callout_flush is set.
2921
2922 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2923 was true (the default) a successful delivery failed to delete the retry
2924 item, thus causing premature timeout of the address. The bug is now
2925 fixed.
2926
2927 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2928
2929 PH/21 Long custom messages for fakedefer and fakereject are now split up
2930 into multiline responses in the same way that messages for "deny" and
2931 other ACL rejections are.
2932
2933 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2934 with slight modification.
2935
2936 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2937 draft, changing the syntax and factoring some duplicate code".
2938
2939 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2940 for deliveries of the second and subsequent messages over the same SMTP
2941 connection.
2942
2943 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2944 ${reduce, with only minor "tidies".
2945
2946 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2947
2948 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2949 expansion side effects.
2950
2951 PH/27 When a message times out after an over-quota error from an Exim-imposed
2952 quota, the bounce message says "mailbox is full". This message was not
2953 being given when it was a system quota that was exceeded. It now should
2954 be the same.
2955
2956 MH/03 Made $recipients available in local_scan(). local_scan() already has
2957 better access to the recipient list through recipients_list[], but
2958 $recipients can be useful in postmaster-provided expansion strings.
2959
2960 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2961 in the case of a MAIL command with additional options following the
2962 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2963 were accidentally chopped off.
2964
2965 PH/29 SMTP synchronization checks are implemented when a command is read -
2966 there is a check that no more input is waiting when there shouldn't be
2967 any. However, for some commands, a delay in an ACL can mean that it is
2968 some time before the response is written. In this time, more input might
2969 arrive, invalidly. So now there are extra checks after an ACL has run for
2970 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2971 pipelining has not been advertised.
2972
2973 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2974
2975 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2976 returned in the SMTP response when smtp_return_error_details was false.
2977 This has been fixed.
2978
2979 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2980 instead of the C I/O that was originally supplied, because problems were
2981 reported on Solaris.
2982
2983 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2984 Exim which did not show up earlier: it was assuming that a call to
2985 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2986 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2987 was a macro that became an assignment, so it seemed to work. This has
2988 changed to a proper function call with a void return, hence the compile
2989 error. Exim's code has been fixed.
2990
2991 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2992 cpus.
2993
2994 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2995
2996 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2997
2998 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2999 because it turns out to be too big or there is a timeout) there is no
3000 "Completed" line in the log. When some messages of this type were
3001 selected by exigrep, they were listed as "not completed". Others were
3002 picked up by some special patterns. I have improved the selection
3003 criteria to be more general.
3004
3005 PH/38 The host_find_failed option in the manualroute router can now be set
3006 to "ignore", to completely ignore a host whose IP address cannot be
3007 found. If all hosts are ignored, the behaviour is controlled by the new
3008 host_all_ignored option.
3009
3010 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3011 homing or because of multiple MX records with /mx) generated more than
3012 one IP address, and the following item turned out to be the local host,
3013 all the secondary addresses of the first item were incorrectly removed
3014 from the list, along with the local host and any following hosts (which
3015 is what is supposed to happen).
3016
3017 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3018 whoever called Exim into the -H file. In the case of the daemon it was
3019 behaving confusingly. When first started, it used values for whoever
3020 started the daemon, but after a SIGHUP it used the Exim user (because it
3021 calls itself on a restart). I have changed the code so that it now always
3022 uses the Exim user.
3023
3024 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3025 message are rejected with the same error (e.g. no authentication or bad
3026 sender address), and a DATA command is nevertheless sent (as can happen
3027 with PIPELINING or a stupid MUA), the error message that was given to the
3028 RCPT commands is included in the rejection of the DATA command. This is
3029 intended to be helpful for MUAs that show only the final error to their
3030 users.
3031
3032 PH/42 Another patch from the Sieve maintainer.
3033
3034 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3035 Eximstats - Fixed some broken HTML links and added missing column headers
3036 (Jez Hancock).
3037 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3038 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3039
3040 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3041
3042 PH/43 Yet another patch from the Sieve maintainer.
3043
3044 PH/44 I found a way to check for a TCP/IP connection going away before sending
3045 the response to the final '.' that terminates a message, but only in the
3046 case where the client has not sent further data following the '.'
3047 (unfortunately, this is allowed). However, in many cases there won't be
3048 any further data because there won't be any more messages to send. A call
3049 to select() can be used: if it shows that the input is "ready", there is
3050 either input waiting, or the socket has been closed. An attempt to read
3051 the next input character can distinguish the two cases. Previously, Exim
3052 would have sent an OK response which the client would never have see.
3053 This could lead to message repetition. This fix should cure that, at
3054 least in a lot of common cases.
3055
3056 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3057 advertised in response to EHLO.
3058
3059
3060 Exim version 4.66
3061 -----------------
3062
3063 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3064 fixed by 4.65/MH/01 (is this a record?) are fixed:
3065
3066 (i) An empty string was always treated as zero by the numeric comparison
3067 operators. This behaviour has been restored.
3068
3069 (ii) It is documented that the numeric comparison operators always treat
3070 their arguments as decimal numbers. This was broken in that numbers
3071 starting with 0 were being interpreted as octal.
3072
3073 While fixing these problems I realized that there was another issue that
3074 hadn't been noticed. Values of message_size_limit (both the global option
3075 and the transport option) were treated as octal if they started with 0.
3076 The documentation was vague. These values are now always treated as
3077 decimal, and I will make that clear in the documentation.
3078
3079
3080 Exim version 4.65
3081 -----------------
3082
3083 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3084 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3085 versions. (#438)
3086
3087 MH/01 Don't check that the operands of numeric comparison operators are
3088 integers when their expansion is in "skipping" mode (fixes bug
3089 introduced by 4.64-PH/07).
3090
3091 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3092 child addresses, Exim now panics and dies. Previously, because the count
3093 is held in a short int, deliveries were likely to be lost. As such a
3094 large number of recipients for a single message is ridiculous
3095 (performance will be very, very poor), I have chosen to impose a limit
3096 rather than extend the field.
3097
3098
3099 Exim version 4.64
3100 -----------------
3101
3102 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3103 leftover -K file (the existence of which was triggered by #402).
3104 While we were at it, introduced process PID as part of the -K
3105 filename. This should rule out race conditions when creating
3106 these files.
3107
3108 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3109 processing considerably. Previous code took too long for large mails,
3110 triggering a timeout which in turn triggers #401.
3111
3112 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3113 in the DK code in transports.c. sendfile() is not really portable,
3114 hence the _LINUX specificness.
3115
3116 TF/01 In the add_headers option to the mail command in an Exim filter,
3117 there was a bug that Exim would claim a syntax error in any
3118 header after the first one which had an odd number of characters
3119 in the field name.
3120
3121 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3122 callout verification, Exim cached a "reject" for the entire domain. This
3123 is correct for most verifications, but it is not correct for a recipient
3124 verification with use_sender or use_postmaster set, because in that case
3125 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3126 case of MAIL FROM:<> rejection from other early rejections (e.g.
3127 rejection of HELO). When verifying a recipient using a non-null MAIL
3128 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3129 Whatever the result of the callout, the value of the domain cache is
3130 left unchanged (for any other kind of callout, getting as far as trying
3131 RCPT means that the domain itself is ok).
3132
3133 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3134 gcc 4.1.1 threw up.
3135
3136 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3137 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3138 session, the daemon ignores ECONNECT errors and logs others; it now
3139 ignores EPIPE as well.
3140
3141 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3142 (quoted-printable decoding).
3143
3144 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3145 later the small subsequent patch to fix an introduced bug.
3146
3147 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3148
3149 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3150
3151 PH/08 An error is now given if message_size_limit is specified negative.
3152
3153 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3154 to be given (somewhat) arbitrary names.
3155
3156 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3157 in 4.64-PH/09.
3158
3159 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3160 miscellaneous code fixes
3161
3162 PH/10 Added the log_reject_target ACL modifier to specify where to log
3163 rejections.
3164
3165 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3166 hostname. This is wrong, because it relates to the incoming message (and
3167 probably the interface on which it is arriving) and not to the outgoing
3168 callout (which could be using a different interface). This has been
3169 changed to use the value of the helo_data option from the smtp transport
3170 instead - this is what is used when a message is actually being sent. If
3171 there is no remote transport (possible with a router that sets up host
3172 addresses), $smtp_active_hostname is used.
3173
3174 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3175 tweaks were necessary in order to get it to work (see also 21 below):
3176 (a) The code assumed that strncpy() returns a negative number on buffer
3177 overflow, which isn't the case. Replaced with Exim's string_format()
3178 function.
3179 (b) There were several signed/unsigned issues. I just did the minimum
3180 hacking in of casts. There is scope for a larger refactoring.
3181 (c) The code used strcasecmp() which is not a standard C function.
3182 Replaced with Exim's strcmpic() function.
3183 (d) The code set only $1; it now sets $auth1 as well.
3184 (e) A simple test gave the error "authentication client didn't specify
3185 service in request". It would seem that Dovecot has changed its
3186 interface. Fortunately there's a specification; I followed it and
3187 changed what the client sends and it appears to be working now.
3188
3189 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3190 decoding.
3191
3192 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3193 address A is aliased to B and C, where B exists and C does not. Without
3194 -v the output is "A verified" because verification stops after a
3195 successful redirection if more than one address is generated. However,
3196 with -v the child addresses are also verified. Exim was outputting "A
3197 failed to verify" and then showing the successful verification for C,
3198 with its parentage. It now outputs "B failed to verify", showing B's
3199 parentage before showing the successful verification of C.
3200
3201 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3202 look up a TXT record in a specific list after matching in a combined
3203 list.
3204
3205 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3206 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3207 they consult the DNS. I had assumed they would set it the way they
3208 wanted; and indeed my experiments on Linux seem to show that in some
3209 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3210 To be on the safe side, however, I have now made the interface to
3211 host_find_byname() similar to host_find_bydns(), with an argument
3212 containing the DNS resolver options. The host_find_byname() function now
3213 sets these options at its start, just as host_find_bydns() does. The smtp
3214 transport options dns_qualify_single and dns_search_parents are passed to
3215 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3216 of host_find_byname() use the default settings of RES_DEFNAMES
3217 (qualify_single) but not RES_DNSRCH (search_parents).
3218
3219 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3220 spool_read_header() do less string testing, by means of a preliminary
3221 switch on the second character of optional "-foo" lines. (This is
3222 overdue, caused by the large number of possibilities that now exist.
3223 Originally there were few.) While I was there, I also converted the
3224 str(n)cmp tests so they don't re-test the leading "-" and the first
3225 character, in the hope this might squeeze out yet more improvement.
3226
3227 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3228 flag allowing group syntax was set by the header_syntax check but not
3229 turned off, possible causing trouble later; (2) The flag was not being
3230 set at all for the header_verify test, causing "group"-style headers to
3231 be rejected. I have now set it in this case, and also caused header_
3232 verify to ignore an empty address taken from a group. While doing this, I
3233 came across some other cases where the code for allowing group syntax
3234 while scanning a header line wasn't quite right (mostly, not resetting
3235 the flag correctly in the right place). These bugs could have caused
3236 trouble for malformed header lines. I hope it is now all correct.
3237
3238 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3239 with the "reply" argument non-NULL. The code, however (which originally
3240 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3241 but it didn't always do it. This confused somebody who was copying the
3242 code for some other use. I have removed all the tests.
3243
3244 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3245 feature that was used to support insecure browsers during the U.S. crypto
3246 embargo. It requires special client support, and Exim is probably the
3247 only MTA that supported it -- and would never use it because real RSA is
3248 always available. This code has been removed, because it had the bad
3249 effect of slowing Exim down by computing (never used) parameters for the
3250 RSA_EXPORT functionality.
3251
3252 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3253 authenticator to fail if there's a tab character in the incoming data
3254 (there should never be unless someone is messing about, as it's supposed
3255 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3256 if the connection is using TLS or if the remote IP is the same as the
3257 local IP, and the "valid-client-cert option" if a client certificate has
3258 been verified.
3259
3260 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3261 authenticators. This can be used for authorization after authentication
3262 succeeds. (In the case of plaintext, it servers for both authentication
3263 and authorization.)
3264
3265 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3266 if any retry times were supplied.
3267
3268 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3269 connection, where there is no client IP address to check. In this
3270 situation, the verify now always succeeds.
3271
3272 PH/25 Applied John Jetmore's -Mset patch.
3273
3274 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3275
3276 PH/27 In a string expansion for a processed (not raw) header when multiple
3277 headers of the same name were present, leading whitespace was being
3278 removed from all of them, but trailing whitespace was being removed only
3279 from the last one. Now trailing whitespace is removed from each header
3280 before concatenation. Completely empty headers in a concatenation (as
3281 before) are ignored.
3282
3283 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3284 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3285
3286 PH/29 [Removed. This was a change that I later backed out, and forgot to
3287 correct the ChangeLog entry (that I had efficiently created) before
3288 committing the later change.]
3289
3290 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3291 address errors (4xx response to RCPT) over the same connection as other
3292 messages routed to the same hosts. Such deliveries are always "forced",
3293 so retry times are not inspected. This resulted in far too many retries
3294 for the affected addresses. The effect occurred only when there were more
3295 hosts than the hosts_max_try setting in the smtp transport when it had
3296 the 4xx errors. Those hosts that it had tried were not added to the list
3297 of hosts for which the message was waiting, so if all were tried, there
3298 was no problem. Two fixes have been applied:
3299
3300 (i) If there are any address or message errors in an SMTP delivery, none
3301 of the hosts (tried or untried) are now added to the list of hosts
3302 for which the message is waiting, so the message should not be a
3303 candidate for sending over the same connection that was used for a
3304 successful delivery of some other message. This seems entirely
3305 reasonable: after all the message is NOT "waiting for some host".
3306 This is so "obvious" that I'm not sure why it wasn't done
3307 previously. Hope I haven't missed anything, but it can't do any
3308 harm, as the worst effect is to miss an optimization.
3309
3310 (ii) If, despite (i), such a delivery is accidentally attempted, the
3311 routing retry time is respected, so at least it doesn't keep
3312 hammering the server.
3313
3314 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3315 in ${readsocket because some servers need this prod.
3316
3317 PH/32 Added some extra debug output when updating a wait-xxx database.
3318
3319 PH/33 The hint "could be header name not terminated by colon", which has been
3320 given for certain expansion errors for a long time, was not being given
3321 for the ${if def:h_colon_omitted{... case.
3322
3323 PH/34 The spec says: "With one important exception, whenever a domain list is
3324 being scanned, $domain contains the subject domain." There was at least
3325 one case where this was not true.
3326
3327 PH/35 The error "getsockname() failed: connection reset by peer" was being
3328 written to the panic log as well as the main log, but it isn't really
3329 panic-worthy as it just means the connection died rather early on. I have
3330 removed the panic log writing for the ECONNRESET error when getsockname()
3331 fails.
3332
3333 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3334 runs only) independently of the message's sender address. This meant
3335 that, if the 4xx error was in fact related to the sender, a different
3336 message to the same recipient with a different sender could confuse
3337 things. In particular, this can happen when sending to a greylisting
3338 server, but other circumstances could also provoke similar problems.
3339 I have changed the default so that the retry time for these errors is now
3340 based a combination of the sender and recipient addresses. This change
3341 can be overridden by setting address_retry_include_sender=false in the
3342 smtp transport.
3343
3344 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3345 remote server are returned as part of bounce messages. This was not
3346 happening for LMTP over a pipe (the lmtp transport), but now it is the
3347 same for both kinds of LMTP.
3348
3349 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3350 in header lines that were in fact CNAMEs. This is no longer the case.
3351
3352 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3353 and queue runs started by the daemon processed all messages. This has
3354 been fixed so that -R and -S can now usefully be given with -q<time>.
3355
3356 PH/40 Import PCRE release 6.7 (fixes some bugs).
3357
3358 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3359
3360 PH/42 Give an error if -q is specified more than once.
3361
3362 PH/43 Renamed the variables $interface_address and $interface_port as
3363 $received_ip_address and $received_port, to make it clear that these
3364 values apply to message reception, and not to the outgoing interface when
3365 a message is delivered. (The old names remain recognized, of course.)
3366
3367 PH/44 There was no timeout on the connect() call when using a Unix domain
3368 socket in the ${readsocket expansion. There now is.
3369
3370 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3371 be meaningful with "accept".
3372
3373 SC/01 Eximstats V1.43
3374 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3375
3376 SC/02 Eximstats V1.44
3377 Use a glob alias rather than an array ref in the generated
3378 parser. This improves both readability and performance.
3379
3380 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3381 Collect SpamAssassin and rejection statistics.
3382 Don't display local sender or destination tables unless
3383 there is data to show.
3384 Added average volumes into the top table text output.
3385
3386 SC/04 Eximstats V1.46
3387 Collect data on the number of addresses (recipients)
3388 as well as the number of messages.
3389
3390 SC/05 Eximstats V1.47
3391 Added 'Message too big' to the list of mail rejection
3392 reasons (thanks to Marco Gaiarin).
3393
3394 SC/06 Eximstats V1.48
3395 Mainlog lines which have GMT offsets and are too short to
3396 have a flag are now skipped.
3397
3398 SC/07 Eximstats V1.49 (Alain Williams)
3399 Added the -emptyok flag.
3400
3401 SC/08 Eximstats V1.50
3402 Fixes for obtaining the IP address from reject messages.
3403
3404 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3405 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3406 whitespace changes from 4.64-PH/27
3407
3408 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3409 match 4.64-PH/13
3410
3411 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3412 are found, allow negative numbers in numeric criteria)
3413
3414 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3415
3416 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3417 to match changes made in 4.64-PH/43
3418
3419 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3420
3421 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3422 "domain" is actually an IP address, and force a failure. This locks out
3423 those revolvers/nameservers that support "A-for-A" lookups, in
3424 contravention of the specifications.
3425
3426 PH/48 When a host name was looked up from an IP address, and the subsequent
3427 forward lookup of the name timed out, the host name was left in
3428 $sender_host_name, contrary to the specification.
3429
3430 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3431 restricted to single-key lookups, Exim was not diagnosing an error if
3432 * or *@ was used with a query-style lookup.
3433
3434 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3435
3436 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3437 long ago, but noone interested enough thought of it. Let's just say that
3438 the "1.1" means that there are some new functions that weren't there at
3439 some point in the past.
3440
3441 PH/51 Error processing for expansion failure of helo_data from an smtp
3442 transport during callout processing was broken.
3443
3444 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3445 tested/used via the -bh/-bhc/-bs options.
3446
3447 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3448 bug, fixed in subsequent PCRE releases).
3449
3450 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3451 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3452
3453 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3454
3455
3456 Exim version 4.63
3457 -----------------
3458
3459 SC/01 Use a glob alias rather than an array ref in eximstats generated
3460 parser. This improves both readability and performance.
3461
3462 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3463 Don't display local sender or destination tables in eximstats unless
3464 there is data to show.
3465 Added average volumes into the eximstats top table text output.
3466
3467 SC/03 Collect data on the number of addresses (recipients) as well
3468 as the number of messages in eximstats.
3469
3470 TF/01 Correct an error in the documentation for the redirect router. Exim
3471 does (usually) call initgroups() when daemonizing.
3472
3473 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3474 with consistent privilege compared to when running as a daemon.
3475
3476 TF/03 Note in the spec that $authenticated_id is not set for local
3477 submissions from trusted users.
3478
3479 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3480 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3481
3482 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3483 by adding some example configuration directives to the default
3484 configuration file. A little bit of work is required to uncomment the
3485 directives and define how usernames and passwords are checked, but
3486 there is now a framework to start from.
3487
3488 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3489 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3490 without this. I don't know how relevant this is to other LDAP libraries.
3491
3492 PH/02 Add the verb name to the "unknown ACL verb" error.
3493
3494 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3495
3496 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3497
3498 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3499 directory not expanded when it should be if an expanded home directory
3500 was set for the address (which is overridden by the transport).
3501
3502 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3503 libradius.
3504
3505 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3506 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3507 because it is too late at that time, and has no effect.
3508
3509 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3510 security issue with \' (bugzilla #107). I could not use the
3511 PQescapeStringConn() function, because it needs a PGconn value as one of
3512 its arguments.
3513
3514 PH/08 When testing addresses using -bt, indicate those final addresses that
3515 are duplicates that would not cause an additional delivery. At least one
3516 person was confused, thinking that -bt output corresponded to deliveries.
3517 (Suppressing duplicates isn't a good idea as you lose the information
3518 about possibly different redirections that led to the duplicates.)
3519
3520 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3521 systems where poll() doesn't work, in particular OS X.
3522
3523 PH/10 Added more information to debugging output for retry time not reached.
3524
3525 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3526 operations in malware.c.
3527
3528 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3529 signatures.
3530
3531 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3532 syslog_duplication set false, log lines that would normally be written
3533 both the the main log and to the reject log were not written to syslog at
3534 all.
3535
3536 PH/14 In the default configuration, change the use of "message" in ACL warn
3537 statements to "add_header".
3538
3539 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3540 not followed by a command (e.g. "seen endif").
3541
3542 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3543 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3544 latter.
3545
3546 PH/17 Added extra conditions to the default value of delay_warning_condition
3547 so that it is now:
3548
3549 ${if or { \
3550 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3551 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3552 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3553 }{no}{yes}}
3554
3555 The Auto-Submitted: and various List- headers are standardised, whereas I
3556 don't think Precedence: ever was.
3557
3558 PH/18 Refactored debugging code in route_finduser() to show more information,
3559 in particular, the error code if getpwnam() issues one.
3560
3561 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3562 This is apparently needed in addition to the PH/07 change above to avoid
3563 any possible encoding problems.
3564
3565 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3566 but not after initializing Perl.
3567
3568 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3569 output them only if debugging. By default they are written stderr,
3570 apparently, which is not desirable.
3571
3572 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3573 queries.
3574
3575 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3576 --not options
3577
3578 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3579
3580 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3581 authenticated or an ident call has been made. Suppress the default
3582 values for $authenticated_id and $authenticated_sender (but permit -oMai
3583 and -oMas) when testing with -bh.
3584
3585 PH/24 Re-jigged the order of the tests in the default configuration so that the
3586 tests for valid domains and recipients precede the DNS black list and CSA
3587 tests, on the grounds that those ones are more expensive.
3588
3589 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3590 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3591 This bug exists in every version of Exim that I still have, right back to
3592 0.12.
3593
3594 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3595 However, an attempt to turn on case-sensitivity in a regex key by
3596 including (?-i) didn't work because the subject string was already
3597 lowercased, and the effects were non-intuitive. It turns out that a
3598 one-line patch can be used to allow (?-i) to work as expected.
3599
3600
3601 Exim version 4.62
3602 -----------------
3603
3604 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3605 other effects) broke the use of negated acl sub-conditions.
3606
3607 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3608 patch).
3609
3610 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3611 "Deny" causes Exim to reject the incoming connection with a 554 error.
3612 Unfortunately, if there is a major crisis, such as a disk failure,
3613 tcp-wrappers gives "deny", whereas what one would like would be some
3614 kind of temporary error. A kludge has been added to help with this.
3615 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3616 554 error is used if errno is still zero or contains ENOENT (which occurs
3617 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3618 451 error is used.
3619
3620 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3621
3622 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3623 errors. Otherwise a message that provokes a temporary error (when other
3624 messages do not) can cause a whole host to time out.
3625
3626 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3627 addresses were routed directly to files or pipes from a redirect router.
3628 File deliveries just didn't batch; pipe deliveries might have suffered
3629 odd errors.
3630
3631 PH/06 A failure to get a lock for a hints database would erroneously always say
3632 "Failed to get write lock", even when it was really a read lock.
3633
3634 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3635 of 0600. This has been changed to use the value of the lockfile_mode
3636 option (which defaults to 0600).
3637
3638 PH/08 Applied small patch from the Sieve maintainer.
3639
3640 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3641 folder from quota calculations, a direct delivery into this folder messed
3642 up the contents of the maildirsize file. This was because the regex was
3643 used only to exclude .Trash (or whatever) when the size of the mailbox
3644 was calculated. There was no check that a delivery was happening into an
3645 excluded directory. This bug has been fixed by ignoring all quota
3646 processing for deliveries into excluded directories.
3647
3648 PH/10 Added the maildirfolder_create_regex option to appendfile.
3649
3650
3651 Exim version 4.61
3652 -----------------
3653
3654 PH/01 The code for finding all the local interface addresses on a FreeBSD
3655 system running IPv6 was broken. This may well have applied to all BSD
3656 systems, as well as to others that have similar system calls. The broken
3657 code found IPv4 interfaces correctly, but gave incorrect values for the
3658 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3659 that it would not match correctly against @[] and not recognize the IPv6
3660 addresses as local.
3661
3662 PH/02 The ipliteral router was not recognizing addresses of the form user@
3663 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3664
3665 PH/03 Added disable_ipv6.
3666
3667 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3668 decoded form, because it is most often used to construct To: headers
3669 lines in autoreplies, and the decoded form may well be syntactically
3670 invalid. However, $reply_address has leading white space removed, and all
3671 newlines turned into spaces so that the autoreply transport does not
3672 grumble.
3673
3674 PH/05 If group was specified without a user on a router, and no group or user
3675 was specified on a transport, the group from the router was ignored.
3676
3677 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3678 for visible compile-time settings that can be used to change these
3679 numbers, for those that want even more. Backwards compatibility with old
3680 spool files has been maintained. However, going back to a previous Exim
3681 release will lost any variables that are in spool files.
3682
3683 PH/07 Two small changes when running in the test harness: increase delay when
3684 passing a TCP/IP connection to a new process, in case the original
3685 process has to generate a bounce, and remove special handling of
3686 127.0.0.2 (sic), which is no longer necessary.
3687
3688 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3689 be the same on different OS.
3690
3691 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3692 testing.
3693
3694 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3695 whether --show-vars was specified or not
3696
3697 JJ/02 exipick: Added support for new ACL variable spool format introduced
3698 in 4.61-PH/06
3699
3700 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3701 syntactically invalid From: or Reply-to: line, and a filter used this to
3702 generate an autoreply, and therefore failed to obtain an address for the
3703 autoreply, Exim could try to deliver to a non-existent relative file
3704 name, causing unrelated and misleading errors. What now happens is that
3705 it logs this as a hard delivery error, but does not attempt to create a
3706 bounce message.
3707
3708 PH/11 The exinext utility has a -C option for testing purposes, but although
3709 the given file was scanned by exinext itself; it wasn't being passed on
3710 when Exim was called.
3711
3712 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3713 an end-of-file indication when reading a command response.
3714
3715 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3716 compiled. In many other places in Exim, IPv6 addresses are always
3717 recognized, so I have changed this. It also means that IPv4 domain
3718 literals of the form [IPV4:n.n.n.n] are now always recognized.
3719
3720 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3721 used if the router is not running as root, for example, when verifying at
3722 ACL time, or when using -bh. The debugging output from this situation was
3723 non-existent - all you got was a failure to exec. I have made two
3724 changes:
3725
3726 (a) Failures to set uid/gid, the current directory, or a process leader
3727 in a subprocess such as that created by queryprogram now generate
3728 suitable debugging output when -d is set.
3729
3730 (b) The queryprogram router detects when it is not running as root,
3731 outputs suitable debugging information if -d is set, and then runs
3732 the subprocess without attempting to change uid/gid.
3733
3734 PH/15 Minor change to Makefile for building test_host (undocumented testing
3735 feature).
3736
3737 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3738 additional section of a DNS packet that returns MX or SRV records.
3739 Instead, it always explicitly searches for A/AAAA records. This avoids
3740 major problems that occur when a DNS server includes only records of one
3741 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3742 fixed another bug: if SRV records were looked up and the corresponding
3743 address records were *not* found in the additional section, the port
3744 values from the SRV records were lost.
3745
3746 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3747 using the correct key (the original address) when searching the retry
3748 rules in order to find which one to use for generating the retry hint.
3749
3750 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3751 adding the default one. Similarly, if it contains a Reply-To: header, the
3752 errors_reply_to option, if set, is not used.
3753
3754 PH/19 When calculating a retry time, Exim used to measure the "time since
3755 failure" by looking at the "first failed" field in the retry record. Now
3756 it does not use this if it is later than than the arrival time of the
3757 message. Instead it uses the arrival time. This makes for better
3758 behaviour in cases where some deliveries succeed, thus re-setting the
3759 "first failed" field. An example is a quota failure for a huge message
3760 when small messages continue to be delivered. Without this change, the
3761 "time since failure" will always be short, possible causing more frequent
3762 delivery attempts for the huge message than are intended.
3763 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3764
3765 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3766 $1, $2, $3) because the numerical variables can be reset during some
3767 expansion items (e.g. "match"), thereby losing the authentication data.
3768
3769 PH/21 Make -bV show the size of off_t variables so that the test suite can
3770 decide whether to run tests for quotas > 2G.
3771
3772 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3773 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3774 filecount value is greater than 2G or if a quota value is greater than 2G
3775 on a system where the size of off_t is not greater than 4, a panic error
3776 is given.
3777
3778 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3779 never match. The debug and -bh output now contains an explicit error
3780 message indicating a malformed IPv4 address or mask.
3781
3782 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3783 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3784 PH/23 above applies.
3785
3786 PH/25 Do not write to syslog when running in the test harness. The only
3787 occasion when this arises is a failure to open the main or panic logs
3788 (for which there is an explicit test).
3789
3790 PH/26 Added the /no_tell option to "control=freeze".
3791
3792 PH/27 If a host name lookup failed very early in a connection, for example, if
3793 the IP address matched host_lookup and the reverse lookup yielded a name
3794 that did not have a forward lookup, an error message of the form "no IP
3795 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3796 could be logged. Now it outputs the IP address instead of "NULL".
3797
3798 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3799 allows the sender and the authenticated sender to be set when
3800 submitting a message from within Exim. Since child_open_exim() is
3801 documented for local_scan(), the new function should be too.
3802
3803 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3804 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3805 results in an empty string is now treated as unset.
3806
3807 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3808
3809 PH/31 Added sender_verify_fail logging option.
3810
3811 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3812 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3813 tidied the source and removed it altogether.
3814
3815 PH/33 When a queue run was abandoned because the load average was too high, a
3816 log line was always written; now it is written only if the queue_run log
3817 selector is set. In addition, the log line for abandonment now contains
3818 information about the queue run such as the pid. This is always present
3819 in "start" and "stop" lines but was omitted from the "abandon" line.
3820
3821 PH/34 Omit spaces between a header name and the colon in the error message that
3822 is given when verify = headers_syntax fails (if there are lots of them,
3823 the message gets confusing).
3824
3825 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3826 names, as there are now some PTR records that contain slashes. This check
3827 is only to protect against broken name servers that fall over on strange
3828 characters, so the fact that it applies to all lookups doesn't matter.
3829
3830 PH/36 Now that the new test suite is complete, we can remove some of the
3831 special code in Exim that was needed for the old test suite. For example,
3832 sorting DNS records because real resolvers return them in an arbitrary
3833 order. The new test suite's fake resolver always returns records in the
3834 same order.
3835
3836 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3837 bounces) except when queue_only is set, to avoid logging races between
3838 the different processes.
3839
3840 PH/38 Panic-die if .include specifies a non-absolute path.
3841
3842 PH/39 A tweak to the "H" retry rule from its user.
3843
3844 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3845 a label. They prevented compilation on older perls.
3846
3847 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3848 a warning to be raised on newish perls.
3849
3850 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3851 on queue. Changes to match documented behaviour of showing count of
3852 messages matching specified criteria.
3853
3854 PH/40 Changed the default ident timeout from 30s to 5s.
3855
3856 PH/41 Added support for the use of login_cap features, on those BSD systems
3857 that have them, for controlling the resources used by pipe deliveries.
3858
3859 PH/42 The content-scanning code uses fopen() to create files in which to put
3860 message data. Previously it was not paying any attention to the mode of
3861 the files. Exim runs with umask(0) because the rest of the code creates
3862 files with open(), and sets the required mode explicitly. Thus, these
3863 files were ending up world-writeable. This was not a big issue, because,
3864 being within the spool directory, they were not world-accessible. I have
3865 created a function called modefopen, which takes an additional mode
3866 argument. It sets umask(777), creates the file, chmods it to the required
3867 mode, then resets the umask. All the relevant calls to fopen() in the
3868 content scanning code have been changed to use this function.
3869
3870 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3871 to 24 hours. This avoids potential overflow problems when processing G
3872 and H retry rules. I suspect nobody ever tinkers with this value.
3873
3874 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3875
3876 PH/45 When the plaintext authenticator is running as a client, the server's
3877 challenges are checked to ensure they are valid base64 strings. By
3878 default, the authentication attempt is cancelled if an invalid string is
3879 received. Setting client_ignore_invalid_base64 true ignores these errors.
3880 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3881 they are received. Thus, the responses can be made to depend on the
3882 challenges. If an invalid string is ignored, an empty string is placed in
3883 the variable.
3884
3885 PH/46 Messages that are created by the autoreply transport now contains a
3886 References: header, in accordance with RFCs 2822 and 3834.
3887
3888 PH/47 Added authenticated_sender_force to the smtp transport.
3889
3890 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3891
3892 PH/49 Installed latest patch from the Sieve maintainer.
3893
3894 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3895 was also set, the appendfile transport was unnecessarily scanning a
3896 directory of message files (e.g. for maildir delivery) to find the count
3897 of files (along with the size), even though it did not need this
3898 information. It now does the scan only if it needs to find either the
3899 size of the count of files.
3900
3901 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3902
3903 PH/52 Two bugs concerned with error handling when the smtp transport is
3904 used in LMTP mode:
3905
3906 (i) Exim was not creating retry information for temporary errors given
3907 for individual recipients after the DATA command when the smtp transport
3908 was used in LMTP mode. This meant that they could be retried too
3909 frequently, and not timed out correctly.
3910
3911 (ii) Exim was setting the flag that allows error details to be returned
3912 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3913 recipients that were returned after the DATA command.
3914
3915 PH/53 This is related to PH/52, but is more general: for any failing address,
3916 when detailed error information was permitted to be returned to the
3917 sender, but the error was temporary, then after the final timeout, only
3918 "retry timeout exceeded" was returned. Now it returns the full error as
3919 well as "retry timeout exceeded".
3920
3921 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3922 do this, and (what is worse) MTAs that accept it.
3923
3924 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3925 will now be deprecated.
3926
3927 PH/56 New os.c-cygwin from the Cygwin maintainer.
3928
3929 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3930 formats (previously only available in exim formats via -bpr, -bpru,
3931 and -bpra. Now also available in native and exiqgrep formats)
3932
3933 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3934 with very large, slow to parse queues
3935
3936 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3937
3938 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3939
3940 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3941 responses to authentication challenges, though it was showing the
3942 challenges; (ii) I've removed the CR characters from the debug output for
3943 SMTP output lines.
3944
3945 PH/58 Allow for the insertion of a newline as well as a space when a string
3946 is turned into more than one encoded-word during RFC 2047 encoding. The
3947 Sieve code now uses this.
3948
3949 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3950 data_4xx, lost_connection, tls_required.
3951
3952 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3953 message was being sent as an SMTP response.
3954
3955 PH/61 Add -l and -k options to exicyclog.
3956
3957 PH/62 When verifying, if an address was redirected to one new address, so that
3958 verification continued, and the new address failed or deferred after
3959 having set something in $address_data, the value of $address_data was not
3960 passed back to the ACL. This was different to the case when no
3961 redirection occurred. The value is now passed back in both cases.
3962
3963 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3964 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3965 use login_cap.h, so on its own it isn't the distinguishing feature. The
3966 new name refers directly to the setclassresources() function.
3967
3968 PH/65 Added configuration files for NetBSD3.
3969
3970 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3971
3972 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3973 is preferred over IPv4.
3974
3975 PH/68 The bounce_return_message and bounce_return_body options were not being
3976 honoured for bounces generated during the reception of non-SMTP messages.
3977 In particular, this applied to messages rejected by the ACL. This bug has
3978 been fixed. However, if bounce_return_message is true and bounce_return_
3979 body is false, the headers that are returned for a non-SMTP message
3980 include only those that have been read before the error was detected.
3981 (In the case of an ACL rejection, they have all been read.)
3982
3983 PH/69 The HTML version of the specification is now built in a directory called
3984 spec_html instead of spec.html, because the latter looks like a path with
3985 a MIME-type, and this confuses some software.
3986
3987 PH/70 Catch two compiler warnings in sieve.c.
3988
3989 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3990 function verify_get_ident() calls ip_connect() to connect a socket, but
3991 if the "connect()" function timed out, ip_connect() used to close the
3992 socket. However, verify_get_ident() also closes the socket later, and in
3993 between Exim writes to the log, which may get opened at this point. When
3994 the socket was closed in ip_connect(), the log could get the same file
3995 descriptor number as the socket. This naturally causes chaos. The fix is
3996 not to close the socket in ip_connect(); the socket should be closed by
3997 the function that creates it. There was only one place in the code where
3998 this was missing, in the iplookup router, which I don't think anybody now
3999 uses, but I've fixed it anyway.
4000
4001 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4002 well as to direct DNS lookups. Otherwise the handling of names in host
4003 lists is inconsistent and therefore confusing.
4004
4005
4006 Exim version 4.60
4007 -----------------
4008
4009 PH/01 Two changes to the default runtime configuration:
4010
4011 (1) Move the checks for relay_from_hosts and authenticated clients from
4012 after to before the (commented out) DNS black list checks.
4013
4014 (2) Add control=submission to the relay_from_hosts and authenticated
4015 clients checks, on the grounds that messages accepted by these
4016 statements are most likely to be submissions.
4017
4018 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4019
4020 (1) Generate an error if the third argument for the ${prvs expansion is
4021 not a single digit.
4022
4023 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4024 string.
4025
4026 (3) Reset the variables that are obtained from the first argument of
4027 ${prvscheck and used in the second argument before leaving the code,
4028 because their memory is reclaimed, so using them afterwards may do
4029 silly things.
4030
4031 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4032 one (it's much easier than Tom thought :-).
4033
4034 (5) Because of (4), we can now allow for the use of $prvscheck_result
4035 inside the third argument.
4036
4037 PH/03 For some reason, the default setting of PATH when running a command from
4038 a pipe transport was just "/usr/bin". I have changed it to
4039 "/bin:/usr/bin".
4040
4041 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4042 anything to be listed in the output from -bV.
4043
4044 PH/05 When a filter generated an autoreply, the entire To: header line was
4045 quoted in the delivery log line, like this:
4046
4047 => >A.N.Other <ano@some.domain> <original@ddress> ...
4048
4049 This has been changed so that it extracts the operative address. There
4050 may be more than one such address. If so, they are comma-separated, like
4051 this:
4052
4053 => >ano@some.domain,ona@other.domain <original@ddress> ...
4054
4055 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4056 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4057 not being looked up in the rDNS to get a host name, Exim was showing the
4058 IP address twice in Received: lines, even though the IP addresses were
4059 identical. For example:
4060
4061 Received: from [1.2.3.4] (helo=[1.2.3.4])
4062
4063 However, if the real host name was known, it was omitting the HELO data
4064 if it matched the actual IP address. This has been tidied up so that it
4065 doesn't show the same IP address twice.
4066
4067 PH/07 When both +timestamp and +memory debugging was on, the value given by
4068 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4069 called by the debug printing, thereby overwriting the timestamp buffer.
4070 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4071
4072 PH/08 When the original message was included in an autoreply transport, it
4073 always said "this is a copy of the message, including all the headers",
4074 even if body_only or headers_only was set. It now gives an appropriate
4075 message.
4076
4077 PH/09 Applied a patch from the Sieve maintainer which:
4078
4079 o fixes some comments
4080 o adds the (disabled) notify extension core
4081 o adds some debug output for the result of if/elsif tests
4082 o points to the current vacation draft in the documentation
4083 and documents the missing references header update
4084
4085 and most important:
4086
4087 o fixes a bug in processing the envelope test (when testing
4088 multiple envelope elements, the last element determined the
4089 result)
4090
4091 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4092 Electronic Mail") by including:
4093
4094 Auto-submitted: auto-generated
4095
4096 in the messages that it generates (bounce messages and others, such as
4097 warnings). In the case of bounce messages for non-SMTP messages, there was
4098 also a typo: it was using "Auto_submitted" (underscore instead of
4099 hyphen). Since every message generated by Exim is necessarily in response
4100 to another message, thes have all been changed to:
4101
4102 Auto-Submitted: auto-replied
4103
4104 in accordance with these statements in the RFC:
4105
4106 The auto-replied keyword:
4107
4108 - SHOULD be used on messages sent in direct response to another
4109 message by an automatic process,
4110
4111 - MUST NOT be used on manually-generated messages,
4112
4113 - MAY be used on Delivery Status Notifications (DSNs) and Message
4114 Disposition Notifications (MDNs),
4115
4116 - MUST NOT be used on messages generated by automatic or periodic
4117 processes, except for messages which are automatic responses to
4118 other messages.
4119
4120 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4121 to the default Received: header definition.
4122
4123 PH/12 Added log selector acl_warn_skipped (default on).
4124
4125 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4126 variables because (a) they are in the wrong storage pool and (b) even if
4127 they were copied, it wouldn't work properly because of the caching.
4128
4129 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4130 checking when decoding. Apparently there are clients that generate
4131 overlong encoded strings. Why am I not surprised?
4132
4133 PH/15 If the first argument of "${if match_address" was not empty, but did not
4134 contain an "@" character, Exim crashed. Now it writes a panic log message
4135 and treats the condition as false.
4136
4137 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4138
4139 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4140 extension "envelope-auth". The code is finished and in agreement with
4141 other implementations, but there is no documentation so far and in fact,
4142 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4143 not changing the active code.
4144
4145 Print executed "if" and "elsif" statements when debugging is used. This
4146 helps a great deal to understand what a filter does.
4147
4148 Document more things not specified clearly in RFC3028. I had all this
4149 sorted out, when out of a sudden new issues came to my mind. Oops."
4150
4151 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4152 (Bugzilla #53).
4153
4154 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4155 canonical form (as documented). However, after a host name lookup from
4156 the IP address, check_host() was doing a simple string comparison with