Logging: do not log a missing proxy address, on delivery non-proxied.
[exim.git] / doc / doc-txt / ChangeLog
1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
6
7
8 Exim version 4.92
9 -----------------
10
11 JH/01 Remove code calling the customisable local_scan function, unless a new
12 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
13
14 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
15 non-signal-safe functions being used.
16
17 JH/03 Bug 2269: When presented with a received message having a stupidly large
18 number of DKIM-Signature headers, disable DKIM verification to avoid
19 a resource-consumption attack. The limit is set at twenty.
20
21 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
22 report of oldest_pass in ${authres } in consequence, and separate out
23 some descriptions of reasons for verification fail.
24
25 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
26 files in the spool were present and unlocked. A queue-runner could spot
27 them, resulting in a duplicate delivery. Fix that by doing the unlock
28 after the unlink. Investigation by Tim Stewart. Take the opportunity to
29 add more error-checking on spoolfile handling while that code is being
30 messed with.
31
32 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
33 No known attacks, no CVE, this is defensive hardening.
34
35 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
36 a queue-runner could start a delivery while other operations were ongoing.
37 Cutthrough delivery was a common victim, resulting in duplicate delivery.
38 Found and investigated by Tim Stewart. Fix by using the open message data
39 file handle rather than opening another, and not locally closing it (which
40 releases a lock) for that case, while creating the temporary .eml format
41 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
42
43 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
44 $sender_verify_failure/$recipient_verify_failure to "random".
45
46 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
47 legitimate.
48
49 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
50 Previously this would segfault.
51
52 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
53 segfault.
54
55 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
56 like zero, since the resolver should be doing this for us, But we need one
57 as a CNAME but no MX presence gets the CNAME returned; we need to check
58 that doesn't point to an MX to declare it "no MX returned" rather than
59 "error, loop". A new main option is added so the older capability of
60 following some limited number of chain links is maintained.
61
62 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
63
64 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
65 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
66 now-deprecated earlier definitions used only specified the range up to TLS
67 1.2 (in the older-version library docs).
68
69 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
70
71 JH/15 Rework TLS client-side context management. Stop using a global, and
72 explicitly pass a context around. This enables future use of TLS for
73 connections to service-daemons (eg. malware scanning) while a client smtp
74 connection is using TLS; with cutthrough connections this is quite likely.
75
76 JH/16 Fix ARC verification to do AS checks in reverse order.
77
78 JH/17 Support a "tls" option on the ${readsocket } expansion item.
79
80 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
81 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
82 Previously the "utf8" would be re-prepended for every additional message.
83
84 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
85 Previously thery were accepted, resulting in issues when attempting to
86 forward messages to a non-supporting MTA.
87
88 PP/02 Let -n work with printing macros too, not just options.
89
90 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
91 one parent address was copied, and bogus data was used at delivery-logging
92 time. Either a crash (after delivery) or bogus log data could result.
93 Discovery and analysis by Tim Stewart.
94
95 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
96 Previously if the string ended mid-character, we did not insert the
97 promised '?' replacement.
98
99 PP/04 Documentation: current string operators work on bytes, not codepoints.
100
101 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
102 should pack well giving a smaller memory footprint so better caching and
103 therefore performance. Group the declarations where this can't be done so
104 that the byte-sized flag variables are not interspersed among pointer
105 variables, giving a better chance of good packing by the compiler.
106
107 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
108 non-null, to avoid issues with sites running BATV. Previously reports were
109 sent with an empty envelope sender so looked like bounces.
110
111 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
112 The ignore_error flag wasn't being returned from the filter subprocess so
113 was not set for later routers. Investigation and fix by Matthias Kurz.
114
115 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
116 and a msg:complete for the whole, when a message is manually removed using
117 -Mrm. Developement by Matthias Kurz, hacked on by JH.
118
119 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
120 a "Gnu special" function, asprintf() in the DB utility binary builds; I
121 hope that is portable enough.
122
123 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
124 requiring a known-CA anchor certificate; make it now rely entirely on the
125 TLSA as an anchor. Checking the name on the leaf cert against the name
126 on the A-record for the host is still done for TA (but not for EE mode).
127
128 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
129 included in delivery lines for non-proxied connections, when compiled with
130 SUPPORT_SOCKS and running with proxy logging enabled.
131
132
133 Exim version 4.91
134 -----------------
135
136 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
137 When redis_servers is set to a list of > 1 element, and the Redis servers
138 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
139 case of MOVED into a DEFER case instead, thus moving the query onto the
140 next server in the list. For a cluster of N elements, all N servers must
141 be defined in redis_servers.
142
143 GF/02 Catch and remove uninitialized value warning in exiqsumm
144 Check for existence of @ARGV before looking at $ARGV[0]
145
146 JH/01 Replace the store_release() internal interface with store_newblock(),
147 which internalises the check required to safely use the old one, plus
148 the allocate and data copy operations duplicated in both (!) of the
149 extant use locations.
150
151 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
152 modifier. This matches the restriction on the commandline.
153
154 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
155 Previously only the last row was returned.
156
157 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
158 we assumed that tags in the header were well-formed, and parsed the
159 element content after inspecting only the first char of the tag.
160 Assumptions at that stage could crash the receive process on malformed
161 input.
162
163 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
164 While running the DKIM ACL we operate on the Permanent memory pool so that
165 variables created with "set" persist to the DATA ACL. Also (at any time)
166 DNS lookups that fail create cache records using the Permanent pool. But
167 expansions release any allocations made on the current pool - so a dnsdb
168 lookup expansion done in the DKIM ACL releases the memory used for the
169 DNS negative-cache, and bad things result. Solution is to switch to the
170 Main pool for expansions.
171 While we're in that code, add checks on the DNS cache during store_reset,
172 active in the testsuite.
173 Problem spotted, and debugging aided, by Wolfgang Breyha.
174
175 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
176 When none of the hosts presented to a transport match an already-open
177 connection, close it and proceed with the list. Previously we would
178 queue the message. Spotted by Lena with Yahoo, probably involving
179 round-robin DNS.
180
181 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
182 Previously a spurious "250 OK id=" response was appended to the proper
183 failure response.
184
185 JH/08 The "support for" informational output now, which built with Content
186 Scanning support, has a line for the malware scanner interfaces compiled
187 in. Interface can be individually included or not at build time.
188
189 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
190 by the template makefile "src/EDITME". The "STREAM" support for an older
191 ClamAV interface method is removed.
192
193 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
194 rows affected is given instead).
195
196 JH/11 The runtime Berkeley DB library version is now additionally output by
197 "exim -d -bV". Previously only the compile-time version was shown.
198
199 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
200 SMTP connection. Previously, when one had more receipients than the
201 first, an abortive onward connection was made. Move to full support for
202 multiple onward connections in sequence, handling cutthrough connection
203 for all multi-message initiating connections.
204
205 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
206 routers. Previously, a multi-recipient message would fail to match the
207 onward-connection opened for the first recipient, and cause its closure.
208
209 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
210 a timeout on read on a GnuTLS initiating connection, resulting in the
211 initiating connection being dropped. This mattered most when the callout
212 was marked defer_ok. Fix to keep the two timeout-detection methods
213 separate.
214
215 JH/15 Relax results from ACL control request to enable cutthrough, in
216 unsupported situations, from error to silently (except under debug)
217 ignoring. This covers use with PRDR, frozen messages, queue-only and
218 fake-reject.
219
220 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
221
222 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
223 metadata, resulting in a crash in free().
224
225 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
226 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
227 Broken also in d185889f4, with init system revamp.
228
229 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
230 Previously we abruptly closed the connection after reading a malware-
231 found indication; now we go on to read the "scan ok" response line,
232 and send a quit.
233
234 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
235 ACL. Previously, a crash would result.
236
237 JH/19 Speed up macro lookups during configuration file read, by skipping non-
238 macro text after a replacement (previously it was only once per line) and
239 by skipping builtin macros when searching for an uppercase lead character.
240
241 JH/20 DANE support moved from Experimental to mainline. The Makefile control
242 for the build is renamed.
243
244 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
245 was allocated for every new TLS startup, meaning one per message. Fix
246 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
247
248 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
249 reported the original. Fix to report (as far as possible) the ACL
250 result replacing the original.
251
252 JH/23 Fix memory leak during multi-message connections using STARTTLS under
253 OpenSSL. Certificate information is loaded for every new TLS startup,
254 and the resources needed to be freed.
255
256 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
257
258 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
259 was not propagated.
260
261 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
262 DATA response info to the (existing) per-recipient response info for
263 the "C=" log element. It can have useful tracking info from the
264 destination system. Patch from Simon Arlott.
265
266 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
267 length value. Previously this would segfault.
268
269 HS/02 Support Avast multiline protoocol, this allows passing flags to
270 newer versions of the scanner.
271
272 JH/28 Ensure that variables possibly set during message acceptance are marked
273 dead before release of memory in the daemon loop. This stops complaints
274 about them when the debug_store option is enabled. Discovered specifically
275 for sender_rate_period, but applies to a whole set of variables.
276 Do the same for the queue-runner and queue-list loops, for variables set
277 from spool message files. Do the same for the SMTP per-message loop, for
278 certain variables indirectly set in ACL operations.
279
280 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
281 as a multi-recipient message from a mailinglist manager). The coding had
282 an arbitrary cutoff number of characters while checking for more input;
283 enforced by writing a NUL into the buffer. This corrupted long / fast
284 input. The problem was exposed more widely when more pipelineing of SMTP
285 responses was introduced, and one Exim system was feeding another.
286 The symptom is log complaints of SMTP syntax error (NUL chars) on the
287 receiving system, and refused recipients seen by the sending system
288 (propating to people being dropped from mailing lists).
289 Discovered and pinpointed by David Carter.
290
291 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
292 replaced by the ${authresults } expansion.
293
294 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
295
296 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
297 allows proper process termination in container environments.
298
299 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
300 Previously the "final dot" had a newline after it; ensure it is CR,LF.
301
302 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
303 and "err_perm", deprecated since 4.83 when the RFC-defined words
304 "temperror" and "permerror" were introduced.
305
306 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
307 transport-filters or DKIM-signing. The restriction was lost in the
308 consolidation of verify-callout and delivery SMTP handling.
309 Extend the restriction to also cover ARC-signing.
310
311 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
312 in defer=pass mode supply a 450 to the initiator. Previously the message
313 would be spooled.
314
315 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
316 tls_require_ciphers is used as before.
317
318 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
319 "pass_unscanned". Only tmpfails from the scanner are written to
320 the paniclog, as they may require admin intervention (permission
321 denied, license issues). Other scanner errors (like decompression
322 bombs) do not cause a paniclog entry.
323
324 JH/36 Fix reinitialisation of DKIM logging variable between messages.
325 Previously it was possible to log spurious information in receive log
326 lines.
327
328 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
329 triggered odd behaviour from Outlook Express clients.
330
331 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
332 suffix list.
333
334 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
335 since the IETF WG has not yet settled on that versus the original
336 "bare" representation.
337
338 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
339 Previously the millisecond value corrupted the output.
340 Fix also for syslog_pid=no and log_selector +pid, for which the pid
341 corrupted the output.
342
343
344 Exim version 4.90
345 -----------------
346
347 JH/01 Rework error string handling in TLS interface so that the caller in
348 more cases is responsible for logging. This permits library-sourced
349 string to be attached to addresses during delivery, and collapses
350 pairs of long lines into single ones.
351
352 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
353 during configuration. Wildcards are allowed and expanded.
354
355 JH/02 Rework error string handling in DKIM to pass more info back to callers.
356 This permits better logging.
357
358 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
359 do not close it down and have the child transport start it up again on
360 the passed-on TCP connection. Instead, proxy the child (and any
361 subsequent ones) for TLS via a unix-domain socket channel. Logging is
362 affected: the continued delivery log lines do not have any DNSSEC, TLS
363 Certificate or OCSP information. TLS cipher information is still logged.
364
365 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
366 identical IP addresses on different listening ports. Will also affect
367 "exiwhat" output.
368
369 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
370 add noisy ifdef guards to special-case this sillyness.
371 Patch from Bernd Kuhls.
372
373 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
374 than 255 are no longer allowed.
375
376 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
377 Disable the session-cache too, which might reduce our load. Since we
378 currrectly use a new context for every connection, both as server and
379 client, there is no benefit for these.
380 GnuTLS appears to not support tickets server-side by default (we don't
381 call gnutls_session_ticket_enable_server()) but client side is enabled
382 by default on recent versions (3.1.3 +) unless the PFS priority string
383 is used (3.2.4 +).
384
385 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
386 <https://reproducible-builds.org/specs/source-date-epoch/>.
387
388 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
389 the check for any unsuccessful recipients did not notice the limit, and
390 erroneously found still-pending ones.
391
392 JH/08 Pipeline CHUNKING command and data together, on kernels that support
393 MSG_MORE. Only in-clear (not on TLS connections).
394
395 JH/09 Avoid using a temporary file during transport using dkim. Unless a
396 transport-filter is involved we can buffer the headers in memory for
397 creating the signature, and read the spool data file once for the
398 signature and again for transmission.
399
400 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
401 4.77 as the kernel support then wasn't solid, having issues in 64bit
402 mode. Now, it's been long enough. Add support for FreeBSD also.
403
404 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
405 case where the routing stage had gathered several addresses to send to
406 a host before calling the transport for the first, we previously failed
407 to close down TLS in the old transport process before passing the TCP
408 connection to the new process. The new one sent a STARTTLS command
409 which naturally failed, giving a failed delivery and bloating the retry
410 database. Investigation and fix prototype from Wolfgang Breyha.
411
412 JH/12 Fix check on SMTP command input synchronisation. Previously there were
413 false-negatives in the check that the sender had not preempted a response
414 or prompt from Exim (running as a server), due to that code's lack of
415 awareness of the SMTP input buffering.
416
417 PP/04 Add commandline_checks_require_admin option.
418 Exim drops privileges sanely, various checks such as -be aren't a
419 security problem, as long as you trust local users with access to their
420 own account. When invoked by services which pass untrusted data to
421 Exim, this might be an issue. Set this option in main configuration
422 AND make fixes to the calling application, such as using `--` to stop
423 processing options.
424
425 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
426 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
427 responses to those, into a single TLS record each way (this usually means
428 a single packet). As a side issue, smtp_enforce_sync now works on TLS
429 connections.
430
431 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
432 affects you only if you're dancing at the edge of the param size limits.
433 If you are, and this message makes sense to you, then: raise the
434 configured limit or use OpenSSL 1.1. Nothing we can do for older
435 versions.
436
437 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
438 cmdline element to get the documented default one. Previously it was
439 inaccessible.
440
441 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
442 are unsuable for non-message-specific reasons - eg. connection timeout,
443 banner-time rejection.
444
445 JH/16 Fix logging of delivery remote port, when specified by router, under
446 callout/hold.
447
448 PP/06 Repair manualroute's ability to take options in any order, even if one
449 is the name of a transport.
450 Fixes bug 2140.
451
452 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
453
454 JH/17 Change the list-building routines interface to use the expanding-string
455 triplet model, for better allocation and copying behaviour.
456
457 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
458 Previously it was constructed the first time a possibly-matching string
459 was met in the configuration file input during startup; now it is done
460 during compilation.
461
462 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
463 compatible one, to avoid the (poorly documented) possibility of a config
464 file in the working directory redirecting the DB files, possibly correpting
465 some existing file. CVE-2017-10140 assigned for BDB.
466
467 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
468 cache-hot. Previously, although the result was properly cached, the
469 initial verify call returned a defer.
470
471 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
472 the main verify for receipient in uncached-mode.
473
474 JH/22 Retire historical build files to an "unsupported" subdir. These are
475 defined as "ones for which we have no current evidence of testing".
476
477 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
478 if present. Previously it was ignored.
479
480 JH/24 Start using specified-initialisers in C structure init coding. This is
481 a C99 feature (it's 2017, so now considered safe).
482
483 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
484 if was a fixed-sized field and bitmask ops via macros; it is now more
485 extensible.
486
487 PP/07 GitHub PR 56: Apply MariaDB build fix.
488 Patch provided by Jaroslav Škarvada.
489
490 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
491 during Coverity cleanups [4.87 JH/47]
492 Diagnosis and fix provided by Michael Fischer v. Mollard.
493
494 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
495 the right size to place the terminating semicolon on its own folded
496 line, the header hash was calculated to an incorrect value thanks to
497 the (relaxed) space the fold became.
498
499 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
500 and confused the parent.
501
502 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
503 which could crash as a result. This could lead to undeliverable messages.
504
505 JH/28 Logging: "next input sent too soon" now shows where input was truncated
506 for log purposes.
507
508 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
509 matters on fast-turnover and PID-randomising systems, which were getting
510 out-of-order delivery.
511
512 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
513 a possibly-overlapping copy. The symptom was that "Remote host closed
514 connection in response to HELO" was logged instead of the actual 4xx
515 error for the HELO.
516
517 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
518 Previously only that bufferd was discarded, resulting in SYMTP command
519 desynchronisation.
520
521 JH/32 DKIM: when a message has multiple signatures matching an identity given
522 in dkim_verify_signers, run the dkim acl once for each. Previously only
523 one run was done. Bug 2189.
524
525 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
526 "panic the current process" to "deliberately defer". The panic log is
527 still written with the problem list name; the mail and reject logs now
528 get a temp-reject line for the message that was being handled, saying
529 something like "domains check lookup or other defer". The SMTP 451
530 message is still "Temporary local problem".
531
532 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
533 A crafted sequence of BDAT commands could result in in-use memory beeing
534 freed. CVE-2017-16943.
535
536 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
537 from SMTP input. Previously it was always done; now only done for DATA
538 and not BDAT commands. CVE-2017-16944.
539
540 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
541 to the message (such as an overlong header line). Previously this was
542 not done and we did not exit BDAT mode. Followon from the previous item
543 though a different problem.
544
545
546 Exim version 4.89
547 -----------------
548
549 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
550 than -2003 did; needs libidn2 in addition to libidn.
551
552 JH/02 The path option on a pipe transport is now expanded before use.
553
554 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
555 Patch provided by "Björn", documentation fix added too.
556
557 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
558 missing a wire-to-host endian conversion.
559
560 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
561 close after a BDAT command line could be taken as a following command,
562 giving a synch failure. Fix by only checking for synch immediately
563 before acknowledging the chunk.
564
565 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
566 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
567 macro. Patches provided by Josh Soref.
568
569 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
570 Previously we did not; the RFC seems ambiguous and VRFY is not listed
571 by IANA as a service extension. However, John Klensin suggests that we
572 should.
573
574 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
575 the dkim code may be unix-mode line endings rather than smtp wire-format
576 CRLF, so prepend a CR to any bare LF.
577
578 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
579 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
580
581 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
582 the first were themselves being wrongly included in the feed into dkim
583 processing; with most chunk sizes in use this resulted in an incorrect
584 body hash calculated value.
585
586 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
587 DKIM signature block, for verification. Although advised against by
588 standards it is specifically not ruled illegal.
589
590 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
591
592 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
593 missing a body hash (the bh= tag).
594
595 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
596 It seems that HAProxy sends the Proxy Protocol information in clear and
597 only then does a TLS startup, so do the same.
598
599 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
600 TCP connections (such as for Spamd) unless the daemon successfully set
601 Fast Open mode on its listening sockets. This fixes breakage seen on
602 too-old kernels or those not configured for Fast Open, at the cost of
603 requiring both directions being enabled for TFO, and TFO never being used
604 by non-daemon-related Exim processes.
605
606 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
607 endings, at least on the first header line. Try to canonify any that get
608 past that check, despite the cost.
609
610 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
611 now limited to an arbitrary five deep, while parsing addresses with the
612 strip_excess_angle_brackets option enabled.
613
614 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
615 instead leave the unprompted TLS handshake in socket buffer for the
616 TLS library to consume.
617
618 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
619
620 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
621
622 JH/16 Drop variables when they go out of scope. Memory management drops a whole
623 region in one operation, for speed, and this leaves assigned pointers
624 dangling. Add checks run only under the testsuite which checks all
625 variables at a store-reset and panics on a dangling pointer; add code
626 explicitly nulling out all the variables discovered. Fixes one known
627 bug: a transport crash, where a dangling pointer for $sending_ip_address
628 originally assigned in a verify callout, is re-used.
629
630 PP/06 Drop '.' from @INC in various Perl scripts.
631
632 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
633
634 PP/08 Reduce a number of compilation warnings under clang; building with
635 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
636 should be warning-free.
637
638 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
639
640 HS/01 Fix portability problems introduced by PP/08 for platforms where
641 realloc(NULL) is not equivalent to malloc() [SunOS et al].
642
643 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
644 chunk. This allows us to accept broken chunked messages. We need a more
645 general solution here.
646
647 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
648 already-broken messages in the queue.
649
650 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
651
652 JH/19 Fix reference counting bug in routing-generated-address tracking.
653
654
655 Exim version 4.88
656 -----------------
657
658 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
659 supports it and a size is available (ie. the sending peer gave us one).
660
661 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
662 years of being deprecated). The replacements are the ACLs
663 acl_smtp_mime and acl_not_smtp_mime.
664
665 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
666 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
667 or even an in-clear connection were permitted. Now, if the host lookup
668 was dnssec and dane was requested then the host is only used if the
669 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
670 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
671 if one fails this test.
672 This means that a poorly-configured remote DNS will make it incommunicado;
673 but it protects against a DNS-interception attack on it.
674
675 JH/04 Bug 1810: make continued-use of an open smtp transport connection
676 non-noisy when a race steals the message being considered.
677
678 JH/05 If main configuration option tls_certificate is unset, generate a
679 self-signed certificate for inbound TLS connections.
680
681 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
682 in rewrites and routers.
683
684 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
685 and logged a warning sing 4.83; now they are a configuration file error.
686
687 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
688 (lacking @domain). Apply the same qualification processing as RCPT.
689
690 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
691
692 JH/10 Support ${sha256:} applied to a string (as well as the previous
693 certificate).
694
695 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
696 a cutthrough deliver is pending, as we always want to make a connection.
697 This also avoids re-routing the message when later placing the cutthrough
698 connection after a verify cache hit.
699 Do not update it with the verify result either.
700
701 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
702 when routing results in more than one destination address.
703
704 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
705 signing (which inhibits the cutthrough capability). Previously only
706 the presence of an option was tested; now an expansion evaluating as
707 empty is permissible (obviously it should depend only on data available
708 when the cutthrough connection is made).
709
710 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
711 the relevant preceding SMTP command did not note the pipelining mode.
712
713 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
714 Previously they were not counted.
715
716 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
717 as one having no matching records. Previously we deferred the message
718 that needed the lookup.
719
720 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
721 distinguished as "(=".
722
723 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
724 for missing MX records. Previously it only worked for missing A records.
725
726 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
727
728 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
729 after the data-go-ahead and data-ack. Patch from Jason Betts.
730
731 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
732 even for a "none" policy. Patch from Tony Meyer.
733
734 JH/22 Fix continued use of a connection for further deliveries. If a port was
735 specified by a router, it must also match for the delivery to be
736 compatible.
737
738 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
739 When one of the recipients of a message was unsuitable for the connection
740 (has no matching addresses), we lost track of needing to mark it
741 deferred. As a result mail would be lost.
742
743 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
744
745 JH/25 Decoding ACL controls is now done using a binary search; the source code
746 takes up less space and should be simpler to maintain. Merge the ACL
747 condition decode tables also, with similar effect.
748
749 JH/26 Fix problem with one_time used on a redirect router which returned the
750 parent address unchanged. A retry would see the parent address marked as
751 delivered, so not attempt the (identical) child. As a result mail would
752 be lost.
753
754 JH/27 Fix a possible security hole, wherein a process operating with the Exim
755 UID can gain a root shell. Credit to http://www.halfdog.net/ for
756 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
757 itself :(
758
759 JH/28 Enable {spool,log} filesystem space and inode checks as default.
760 Main config options check_{log,spool}_{inodes,space} are now
761 100 inodes, 10MB unless set otherwise in the configuration.
762
763 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
764 Previously it only applied to the main-section connection policy
765 options.
766
767 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
768
769 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
770 by me. Added RFC7919 DH primes as an alternative.
771
772 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
773 are not in the system include path.
774
775 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
776 GnuTLS, when a session startup failed (eg because the client disconnected)
777 Exim did stdio operations after fclose. This was exposed by a recent
778 change which nulled out the file handle after the fclose.
779
780 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
781 signed directly by the cert-signing cert, rather than an intermediate
782 OCSP-signing cert. This is the model used by LetsEncrypt.
783
784 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
785
786 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
787 an incoming connection.
788
789 HS/02 Bug 1802: Do not half-close the connection after sending a request
790 to rspamd.
791
792 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
793 fallback to "prime256v1".
794
795 JH/34 SECURITY: Use proper copy of DATA command in error message.
796 Could leak key material. Remotely exploitable. CVE-2016-9963.
797
798
799 Exim version 4.87
800 -----------------
801
802 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
803 and 3.4.4 - once the server is enabled to respond to an OCSP request
804 it does even when not requested, resulting in a stapling non-aware
805 client dropping the TLS connection.
806
807 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
808 support variable-length bit vectors. No functional change.
809
810 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
811 The I= interface field on outgoing lines is now after the H= remote
812 host field, same as incoming lines. There is a separate
813 outgoing_interface log selector which allows you to disable the
814 outgoing I= field.
815
816 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
817 If not running log_selector +smtp_connection the mainlog would be held
818 open indefinitely after a "too many connections" event, including to a
819 deleted file after a log rotate. Leave the per net connection logging
820 leaving it open for efficiency as that will be quickly detected by the
821 check on the next write.
822
823 HS/01 Bug 1671: Fix post transport crash.
824 Processing the wait-<transport> messages could crash the delivery
825 process if the message IDs didn't exist for some reason. When
826 using 'split_spool_directory=yes' the construction of the spool
827 file name failed already, exposing the same netto behaviour.
828
829 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
830 mime_regex ACL conditions.
831
832 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
833 to DSN fail messages (bounces): remote IP, remote greeting, remote response
834 to HELO, local diagnostic string.
835
836 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
837 log line to debug. Even when configured with a tls authenticator many
838 client connections are expected to not authenticate in this way, so
839 an authenticate fail is not an error.
840
841 HS/02 Add the Exim version string to the process info. This way exiwhat
842 gives some more detail about the running daemon.
843
844 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
845 matter for fast-change records such as DNSBLs.
846
847 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
848 retry record, even if constant. There may be multiple transports with
849 different interface settings and the retry behaviour needs to be kept
850 distinct.
851
852 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
853
854 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
855
856 JH/10 Bug 840: fix log_defer_output option of pipe transport
857
858 JH/11 Bug 830: use same host for all RCPTS of a message, even under
859 hosts_randomize. This matters a lot when combined with mua_wrapper.
860
861 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
862 ${quote_pgsql:<string>} operator.
863
864 JH/13 Bug 1708: avoid misaligned access in cached lookup.
865
866 JH/14 Change header file name for freeradius-client. Relevant if compiling
867 with Radius support; from the Gentoo tree and checked under Fedora.
868
869 JH/15 Bug 1712: Introduce $prdr_requested flag variable
870
871 JH/16 Bug 1714: Permit an empty string as expansion result for transport
872 option transport_filter, meaning no filtering.
873
874 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
875
876 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
877 defaults to "*" (all hosts). The variable is now available when not built
878 with TLS, default unset, mainly to enable keeping the testsuite sane.
879 If a server certificate is not supplied (via tls_certificate) an error is
880 logged, and clients will find TLS connections fail on startup. Presumably
881 they will retry in-clear.
882 Packagers of Exim are strongly encouraged to create a server certificate
883 at installation time.
884
885 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
886 with the $config_file variable.
887
888 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
889 in transport context, after the attempt, and per-recipient. The latter type
890 is per host attempted. The event data is the error message, and the errno
891 information encodes the lookup type (A vs. MX) used for the (first) host,
892 and the trailing two digits of the smtp 4xx response.
893
894 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
895 to write to mainlog (or rejectlog, paniclog) in the window between file
896 creation and permissions/ownership being changed. Particularly affects
897 installations where exicyclog is run as root, rather than exim user;
898 result is that the running daemon panics and dies.
899
900 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
901
902 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
903 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
904 "pri" and "weight". Note that the previous implicit priority given by the
905 list order is no longer honoured.
906
907 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
908 for DKIM processing.
909
910 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
911 by defining SUPPORT_SOCKS.
912
913 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
914 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
915 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
916 variables are renamed to proxy_{local,external}_{address,port}.
917
918 JH/27 Move Internationalisation support from Experimental to mainline, enabled
919 for a build by defining SUPPORT_I18N
920
921 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
922 of the query string, and make ${quote_redis:} do that quoting.
923
924 JH/29 Move Events support from Experimental to mainline, enabled by default
925 and removable for a build by defining DISABLE_EVENT.
926
927 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
928
929 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
930 cached by the daemon.
931
932 JH/32 Move Redis support from Experimental to mainline, enabled for a build
933 by defining LOOKUP_REDIS. The libhiredis library is required.
934
935 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
936 keys are given for lookup.
937
938 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
939 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
940 only supported when built with TLS support. The PolarSSL SHA routines
941 are still used when the TLS library is too old for convenient support.
942
943 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
944 openssl_options), for security. OpenSSL forces this from version 1.1.0
945 server-side so match that on older versions.
946
947 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
948 allocation for $value could be released as the expansion processing
949 concluded, but leaving the global pointer active for it.
950
951 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
952 and to use the domains and local_parts ACL conditions.
953
954 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
955 incorrectly not doubled on cutthrough transmission, hence seen as a
956 body-termination at the receiving system - resulting in truncated mails.
957 Commonly the sender saw a TCP-level error, and retransmitted the message
958 via the normal store-and-forward channel. This could result in duplicates
959 received - but deduplicating mailstores were liable to retain only the
960 initial truncated version.
961
962 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
963
964 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
965
966 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
967 we're in there, support oversigning also; bug 1309.
968
969 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
970
971 HS/04 Add support for keep_environment and add_environment options.
972
973 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
974 either intentional arithmetic overflow during PRNG, or testing config-
975 induced overflows.
976
977 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
978 delivery resulted in actual delivery. Cancel cutthrough before DATA
979 stage.
980
981 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
982 rejects a recipient: pass the reject to the originator.
983
984 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
985 Many were false-positives and ignorable, but it's worth fixing the
986 former class.
987
988 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
989 for the new environment-manipulation done at startup. Move the routines
990 from being local to tls.c to being global via the os.c file.
991
992 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
993 an extract embedded as result-arg for a map, the first arg for extract
994 is unavailable so we cannot tell if this is a numbered or keyed
995 extraction. Accept either.
996
997
998 Exim version 4.86
999 -----------------
1000
1001 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1002 expanded.
1003
1004 JH/02 The smtp transport option "multi_domain" is now expanded.
1005
1006 JH/03 The smtp transport now requests PRDR by default, if the server offers
1007 it.
1008
1009 JH/04 Certificate name checking on server certificates, when exim is a client,
1010 is now done by default. The transport option tls_verify_cert_hostnames
1011 can be used to disable this per-host. The build option
1012 EXPERIMENTAL_CERTNAMES is withdrawn.
1013
1014 JH/05 The value of the tls_verify_certificates smtp transport and main options
1015 default to the word "system" to access the system default CA bundle.
1016 For GnuTLS, only version 3.0.20 or later.
1017
1018 JH/06 Verification of the server certificate for a TLS connection is now tried
1019 (but not required) by default. The verification status is now logged by
1020 default, for both outbound TLS and client-certificate supplying inbound
1021 TLS connections
1022
1023 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1024 sites use this now.
1025
1026 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1027 Status Notification (bounce) messages are now MIME format per RFC 3464.
1028 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1029 under the control of the dsn_advertise_hosts option, and routers may
1030 have a dsn_lasthop option.
1031
1032 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1033 default, modifiable by a malware= option. The list separator for
1034 the options can now be changed in the usual way. Bug 68.
1035
1036 JH/10 The smtp_receive_timeout main option is now expanded before use.
1037
1038 JH/11 The incoming_interface log option now also enables logging of the
1039 local interface on delivery outgoing connections.
1040
1041 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1042 if the interface and destination host and port all match.
1043
1044 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1045 /defer_ok option.
1046
1047 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1048 Patch from Andrew Lewis.
1049
1050 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1051 now supports optional time-restrictions, weighting, and priority
1052 modifiers per server. Patch originally by <rommer@active.by>.
1053
1054 JH/16 The spamd_address main option now supports a mixed list of local
1055 and remote servers. Remote servers can be IPv6 addresses, and
1056 specify a port-range.
1057
1058 JH/17 Bug 68: The spamd_address main option now supports an optional
1059 timeout value per server.
1060
1061 JH/18 Bug 1581: Router and transport options headers_add/remove can
1062 now have the list separator specified.
1063
1064 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1065 option values.
1066
1067 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1068 under OpenSSL.
1069
1070 JH/21 Support for the A6 type of dns record is withdrawn.
1071
1072 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1073 rather than the verbs used.
1074
1075 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1076 from 255 to 1024 chars.
1077
1078 JH/24 Verification callouts now attempt to use TLS by default.
1079
1080 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1081 are generic router options now. The defaults didn't change.
1082
1083 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1084 Original patch from Alexander Shikoff, worked over by JH.
1085
1086 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1087 files if ZCAT_COMMAND is not executable.
1088
1089 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1090
1091 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1092
1093 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1094 Normally benign, it bites when the pair was led to by a CNAME;
1095 modern usage is to not canonicalize the domain to a CNAME target
1096 (and we were inconsistent anyway for A-only vs AAAA+A).
1097
1098 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1099
1100 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1101 when evaluating $sender_host_dnssec.
1102
1103 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1104 $sender_helo_dnssec variable.
1105
1106 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1107
1108 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1109
1110 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1111
1112 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1113 documented as working, but never had. Support all but $spam_report.
1114
1115 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1116 added for tls authenticator.
1117
1118 HS/03 Add perl_taintmode main config option
1119
1120
1121 Exim version 4.85
1122 -----------------
1123
1124 TL/01 When running the test suite, the README says that variables such as
1125 no_msglog_check are global and can be placed anywhere in a specific
1126 test's script, however it was observed that placement needed to be near
1127 the beginning for it to behave that way. Changed the runtest perl
1128 script to read through the entire script once to detect and set these
1129 variables, reset to the beginning of the script, and then run through
1130 the script parsing/test process like normal.
1131
1132 TL/02 The BSD's have an arc4random API. One of the functions to induce
1133 adding randomness was arc4random_stir(), but it has been removed in
1134 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1135 function when detected.
1136
1137 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1138 cause callback expansion.
1139
1140 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1141 syntax errors in an expansion can be treated as a string instead of
1142 logging or causing an error, due to the internal use of bool_lax
1143 instead of bool when processing it.
1144
1145 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1146 server certificates when making smtp deliveries.
1147
1148 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1149
1150 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1151
1152 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1153
1154 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1155 Merged patch from Sebastian Wiedenroth.
1156
1157 JH/05 Fix results-pipe from transport process. Several recipients, combined
1158 with certificate use, exposed issues where response data items split
1159 over buffer boundaries were not parsed properly. This eventually
1160 resulted in duplicates being sent. This issue only became common enough
1161 to notice due to the introduction of connection certificate information,
1162 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1163
1164 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1165 size buffer was used, resulting in syntax errors when an expansion
1166 exceeded it.
1167
1168 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1169 version 3.3.6 or later.
1170
1171 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1172 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1173 both become "event_action", the variables become $event_name, $event_data
1174 and $event_defer_errno. There is a new variable $verify_mode, usable in
1175 routers, transports and related events. The tls:cert event is now also
1176 raised for inbound connections, if the main configuration event_action
1177 option is defined.
1178
1179 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1180 early OCSP support, but no stapling (appears to be less than 1.0.0).
1181
1182 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1183 server certificate names available under the smtp transport option
1184 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1185 matches.
1186
1187 JH/10 Time-related extraction expansions from certificates now use the main
1188 option "timezone" setting for output formatting, and are consistent
1189 between OpenSSL and GnuTLS compilations. Bug 1541.
1190
1191 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1192 encoded parameter in the incoming message. Bug 1558.
1193
1194 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1195 include certificate info, eximon was claiming there were spoolfile
1196 syntax errors.
1197
1198 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1199
1200 JH/14 Log delivery-related information more consistently, using the sequence
1201 "H=<name> [<ip>]" wherever possible.
1202
1203 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1204 are problematic for Debian distribution, omit them from the release
1205 tarball.
1206
1207 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1208
1209 JH/16 Fix string representation of time values on 64bit time_t architectures.
1210 Bug 1561.
1211
1212 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1213 output list separator was used.
1214
1215
1216 Exim version 4.84
1217 -----------------
1218 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1219 checkers that were complaining about end of non-void function with no
1220 return.
1221
1222 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1223 This was a regression introduced in 4.83 by another bugfix.
1224
1225 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1226
1227 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1228 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1229
1230
1231 Exim version 4.83
1232 -----------------
1233
1234 TF/01 Correctly close the server side of TLS when forking for delivery.
1235
1236 When a message was received over SMTP with TLS, Exim failed to clear up
1237 the incoming connection properly after forking off the child process to
1238 deliver the message. In some situations the subsequent outgoing
1239 delivery connection happened to have the same fd number as the incoming
1240 connection previously had. Exim would try to use TLS and fail, logging
1241 a "Bad file descriptor" error.
1242
1243 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1244 utilities have not been installed.
1245
1246 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1247 temporary space as the ACL may create new global variables.
1248
1249 TL/01 LDAP support uses per connection or global context settings, depending
1250 upon the detected version of the libraries at build time.
1251
1252 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1253 to extract and use the src ip:port in logging and expansions as if it
1254 were a direct connection from the outside internet. PPv2 support was
1255 updated based on HAProxy spec change in May 2014.
1256
1257 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1258
1259 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1260 Properly escape header and check for NULL return.
1261
1262 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1263 not dns_use_dnssec.
1264
1265 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1266
1267 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1268 characters in header names, implemented as a verify condition.
1269 Contributed by Michael Fischer v. Mollard.
1270
1271 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1272 results permerror and temperror. Previous values are deprecated but
1273 still accepted. In a future release, err_perm and err_temp will be
1274 completely removed, which will be a backward incompatibility if the
1275 ACL tests for either of these two old results. Patch contributed by
1276 user bes-internal on the mailing list.
1277
1278 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1279
1280 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1281 selectors, in both main and reject logs.
1282
1283 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1284 failed delivery.
1285
1286 JH/07 Add malware type "sock" for talking to simple daemon.
1287
1288 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1289
1290 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1291 routers/transports under cutthrough routing.
1292
1293 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1294 numbers. Touch up "bool" conditional to keep the same definition.
1295
1296 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1297
1298 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1299
1300 JH/12 Expand items in router/transport headers_add or headers_remove lists
1301 individually rather than the list as a whole. Bug 1452.
1302
1303 Required for reasonable handling of multiple headers_ options when
1304 they may be empty; requires that headers_remove items with embedded
1305 colons must have them doubled (or the list-separator changed).
1306
1307 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1308 view the policy declared in the DMARC record. Currently, $dmarc_status
1309 is a combined value of both the record presence and the result of the
1310 analysis.
1311
1312 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1313
1314 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1315 dnslookup router and the smtp transport (applying to the forward
1316 lookup).
1317
1318 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1319 of ldap servers used for a specific lookup. Patch provided by Heiko
1320 Schlichting.
1321
1322 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1323 New variable $lookup_dnssec_authenticated for observability.
1324
1325 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1326 Patch submitted by Lars Timman.
1327
1328 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1329
1330 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1331 Requires trusted mode and valid format message id, aborts otherwise.
1332 Patch contributed by Heiko Schlichting.
1333
1334 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1335 certextract with support for various fields. Bug 1358.
1336
1337 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1338 is requested by default, modifiable by smtp transport option
1339 hosts_request_ocsp.
1340
1341 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1342 operate on certificate variables to give certificate fingerprints
1343 Also new ${sha256:cert_variable}.
1344
1345 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1346
1347 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1348 Christian Aistleitner.
1349
1350 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1351
1352 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1353 file. Patch from Wolfgang Breyha.
1354
1355 JH/25 Expand the coverage of the delivery $host and $host_address to
1356 client authenticators run in verify callout. Bug 1476.
1357
1358 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1359 align with daemon_smtp_ports. Bug 72.
1360
1361 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1362 support and error reporting did not work properly.
1363
1364 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1365 and is readable. Patch from Andrew Colin Kissa.
1366
1367 TL/14 Enhance documentation of ${run expansion and how it parses the
1368 commandline after expansion, particularly in the case when an
1369 unquoted variable expansion results in an empty value.
1370
1371 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1372
1373 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1374 by renaming away from it. Addresses GH issue 15, reported by
1375 Jasper Wallace.
1376
1377 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1378
1379 TL/15 SECURITY: prevent double expansion in math comparison functions
1380 (can expand unsanitized data). Not remotely exploitable.
1381 CVE-2014-2972
1382
1383
1384 Exim version 4.82
1385 -----------------
1386
1387 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1388
1389 PP/02 Make -n do something, by making it not do something.
1390 When combined with -bP, the name of an option is not output.
1391
1392 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1393 by GnuTLS.
1394
1395 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1396 $sender_host_name and config options to manage this, and basic check
1397 routines.
1398
1399 PP/05 DSCP support for outbound connections and control modifier for inbound.
1400
1401 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1402 (Only plugin which currently uses this is kerberos4, which nobody should
1403 be using, but we should make it available and other future plugins might
1404 conceivably use it, even though it would break NAT; stuff *should* be
1405 using channel bindings instead).
1406
1407 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1408 name; added for Sendmail compatibility; requires admin caller.
1409 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1410 just ignore it); requires trusted caller.
1411 Also parse but ignore: -Ac -Am -X<logfile>
1412 Bugzilla 1117.
1413
1414 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1415
1416 TL/02 Add +smtp_confirmation as a default logging option.
1417
1418 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1419 Patch by Magnus Holmgren from 2007-02-20.
1420
1421 TL/04 Bugzilla 1281 - Spec typo.
1422 Bugzilla 1283 - Spec typo.
1423 Bugzilla 1290 - Spec grammar fixes.
1424
1425 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1426
1427 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1428
1429 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1430 mailing list by by Dmitry Isaikin.
1431
1432 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1433
1434 JH/02 Support "G" suffix to numbers in ${if comparisons.
1435
1436 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1437
1438 NM/01 Bugzilla 1197 - Spec typo
1439 Bugzilla 1196 - Spec examples corrections
1440
1441 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1442
1443 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1444 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1445 function.
1446
1447 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1448 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1449
1450 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1451 "acl {{name}{arg}...}", and optional args on acl condition
1452 "acl = name arg..."
1453
1454 JH/05 Permit multiple router/transport headers_add/remove lines.
1455
1456 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1457
1458 JH/07 Avoid using a waiting database for a single-message-only transport.
1459 Performance patch from Paul Fisher. Bugzilla 1262.
1460
1461 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1462 Bugzilla 884.
1463
1464 JH/09 Add $headers_added variable, with content from use of ACL modifier
1465 add_header (but not yet added to the message). Bugzilla 199.
1466
1467 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1468 Pulled from Bugzilla 817 by Wolfgang Breyha.
1469
1470 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1471 CVE-2012-5671
1472 (nb: this is the same fix as in Exim 4.80.1)
1473
1474 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1475 authenticators.
1476
1477 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1478 for control.
1479
1480 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1481
1482 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1483 advertise SMTP AUTH mechanism to us, instead of a generic
1484 protocol violation error. Also, make Exim more robust to bad
1485 data from the Dovecot auth socket.
1486
1487 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1488
1489 When a queue runner is handling a message, Exim first routes the
1490 recipient addresses, during which it prunes them based on the retry
1491 hints database. After that it attempts to deliver the message to
1492 any remaining recipients. It then updates the hints database using
1493 the retry rules.
1494
1495 So if a recipient address works intermittently, it can get repeatedly
1496 deferred at routing time. The retry hints record remains fresh so the
1497 address never reaches the final cutoff time.
1498
1499 This is a fairly common occurrence when a user is bumping up against
1500 their storage quota. Exim had some logic in its local delivery code
1501 to deal with this. However it did not apply to per-recipient defers
1502 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1503
1504 This change adds a proper retry rule check during routing so that the
1505 final cutoff time is checked against the message's age. We only do
1506 this check if there is an address retry record and there is not a
1507 domain retry record; this implies that previous attempts to handle
1508 the address had the retry_use_local_parts option turned on. We use
1509 this as an approximation for the destination being like a local
1510 delivery, as in LMTP.
1511
1512 I suspect this new check makes the old local delivery cutoff check
1513 redundant, but I have not verified this so I left the code in place.
1514
1515 TF/02 Correct gecos expansion when From: is a prefix of the username.
1516
1517 Test 0254 submits a message to Exim with the header
1518
1519 Resent-From: f
1520
1521 When I ran the test suite under the user fanf2, Exim expanded
1522 the header to contain my full name, whereas it should have added
1523 a Resent-Sender: header. It erroneously treats any prefix of the
1524 username as equal to the username.
1525
1526 This change corrects that bug.
1527
1528 GF/01 DCC debug and logging tidyup
1529 Error conditions log to paniclog rather than rejectlog.
1530 Debug lines prefixed by "DCC: " to remove any ambiguity.
1531
1532 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1533
1534 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1535 Bug spotted by Jeremy Harris; was flawed since initial commit.
1536 Would have resulted in OCSP responses post-SNI triggering an Exim
1537 NULL dereference and crash.
1538
1539 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1540
1541 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1542 Bug detection, analysis and fix by Samuel Thibault.
1543 Bugzilla 1331, Debian bug #698092.
1544
1545 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1546
1547 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1548 Server implementation by Todd Lyons, client by JH.
1549 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1550 config variable "prdr_enable" controls whether the server
1551 advertises the facility. If the client requests PRDR a new
1552 acl_data_smtp_prdr ACL is called once for each recipient, after
1553 the body content is received and before the acl_smtp_data ACL.
1554 The client is controlled by both of: a hosts_try_prdr option
1555 on the smtp transport, and the server advertisement.
1556 Default client logging of deliveries and rejections involving
1557 PRDR are flagged with the string "PRDR".
1558
1559 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1560 fclose(). Diagnosis by Todd Lyons.
1561
1562 PP/17 Update configure.default to handle IPv6 localhost better.
1563 Patch by Alain Williams (plus minor tweaks).
1564 Bugzilla 880.
1565
1566 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1567 This is now consistent with GnuTLS, and is now documented: the
1568 previous undocumented portable approach to treating the option as
1569 unset was to force an expansion failure. That still works, and
1570 an empty string is now equivalent.
1571
1572 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1573 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1574 not performing validation itself.
1575
1576 PP/20 Added force_command boolean option to pipe transport.
1577 Patch from Nick Koston, of cPanel Inc.
1578
1579 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1580 Bugzilla 321, 823.
1581
1582 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1583
1584 PP/21 Fix eximon continuous updating with timestamped log-files.
1585 Broken in a format-string cleanup in 4.80, missed when I repaired the
1586 other false fix of the same issue.
1587 Report and fix from Heiko Schlichting.
1588 Bugzilla 1363.
1589
1590 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1591 Report from Prashanth Katuri.
1592
1593 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1594 It's SecureTransport, so affects any MacOS clients which use the
1595 system-integrated TLS libraries, including email clients.
1596
1597 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1598 using a MIME ACL for non-SMTP local injection.
1599 Report and assistance in diagnosis by Warren Baker.
1600
1601 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1602
1603 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1604
1605 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1606 last id that failed so it may be referenced in subsequent ACL's.
1607
1608 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1609 Alexander Miroch.
1610
1611 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1612 ldap library initialization, allowing self-signed CA's to be
1613 used. Also properly sets require_cert option later in code by
1614 using NULL (global ldap config) instead of ldap handle (per
1615 session). Bug diagnosis and testing by alxgomz.
1616
1617 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1618 the src/util/ subdirectory.
1619
1620 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1621 renamed to Transport Post Delivery Action by Jeremy Harris, as
1622 EXPERIMENTAL_TPDA.
1623
1624 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1625 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1626 redis_servers = needs to be configured which will be used by the redis
1627 lookup. Patch from Warren Baker, of The Packet Hub.
1628
1629 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1630
1631 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1632 hostname or reverse DNS when processing a host list. Used suggestions
1633 from multiple comments on this bug.
1634
1635 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1636
1637 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1638 Missed a few lines, added it to make the runtest require no keyboard
1639 interaction.
1640
1641 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1642 contains upper case chars. Make router use caseful_local_part.
1643
1644 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1645 support when GnuTLS has been built with p11-kit.
1646
1647
1648 Exim version 4.80.1
1649 -------------------
1650
1651 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1652 CVE-2012-5671
1653 This, or similar/improved, will also be change PP/11 of 4.82.
1654
1655
1656 Exim version 4.80
1657 -----------------
1658
1659 PP/01 Handle short writes when writing local log-files.
1660 In practice, only affects FreeBSD (8 onwards).
1661 Bugzilla 1053, with thanks to Dmitry Isaikin.
1662
1663 NM/01 Bugzilla 949 - Documentation tweak
1664
1665 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1666 improved.
1667
1668 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1669
1670 PP/02 Implemented gsasl authenticator.
1671
1672 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1673
1674 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1675 `pkg-config foo` for cflags/libs.
1676
1677 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1678 with rest of GSASL and with heimdal_gssapi.
1679
1680 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1681 `pkg-config foo` for cflags/libs for the TLS implementation.
1682
1683 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1684 properties get this fed in as external SSF. A number of robustness
1685 and debugging improvements to the cyrus_sasl authenticator.
1686
1687 PP/08 cyrus_sasl server now expands the server_realm option.
1688
1689 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1690 Patch by Jeremy Harris.
1691
1692 PP/10 Added dbmjz lookup type.
1693
1694 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1695
1696 PP/12 MAIL args handles TAB as well as SP, for better interop with
1697 non-compliant senders.
1698 Analysis and variant patch by Todd Lyons.
1699
1700 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1701 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1702 Patch from Dirk Mueller <dmueller@suse.com>
1703
1704 PP/13 tls_peerdn now print-escaped for spool files.
1705 Observed some $tls_peerdn in wild which contained \n, which resulted
1706 in spool file corruption.
1707
1708 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1709 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1710 or write after TLS renegotiation, which otherwise led to messages
1711 "Got SSL error 2".
1712
1713 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1714 as a tracking header (ie: a signed header comes before the signature).
1715 Patch from Wolfgang Breyha.
1716
1717 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1718 comma-sep list; embedded commas doubled.
1719
1720 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1721
1722 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1723 diagnostics.
1724 Report and patch from Dmitry Banschikov.
1725
1726 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1727 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1728 failures. We appear to now support TLS1.1+ with Exim.
1729
1730 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1731 lets Exim select keys and certificates based upon TLS SNI from client.
1732 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1733 before an outbound SMTP session. New log_selector, +tls_sni.
1734
1735 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1736 NULL dereference. Report and patch from Alun Jones.
1737
1738 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1739 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1740 Not seeing resolver debug output on NetBSD, but suspect this is a
1741 resolver implementation change.
1742
1743 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1744 Left warnings. Added "eximon gdb" invocation mode.
1745
1746 PP/21 Defaulting "accept_8bitmime" to true, not false.
1747
1748 PP/22 Added -bw for inetd wait mode support.
1749
1750 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1751 locate the relevant includes and libraries. Made this the default.
1752
1753 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1754 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1755
1756 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1757 This may cause build issues on older platforms.
1758
1759 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1760 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1761 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1762 Added SNI support via GnuTLS too.
1763 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1764
1765 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1766
1767 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1768 Applied second patch from Janne, implementing suggestion to default
1769 multiple-strings-in-record handling to match SPF spec.
1770
1771 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1772
1773 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1774 read-only, out of scope).
1775 Patch from Wolfgang Breyha, report from Stuart Northfield.
1776
1777 PP/29 Fix three issues highlighted by clang analyser static analysis.
1778 Only crash-plausible issue would require the Cambridge-specific
1779 iplookup router and a misconfiguration.
1780 Report from Marcin Mirosław.
1781
1782 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1783
1784 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1785 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1786 As part of this, removing so much warning spew let me fix some minor
1787 real issues in debug logging.
1788
1789 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1790 assignment on my part. Fixed.
1791
1792 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1793 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1794 Janne Snabb (who went above and beyond: thank you).
1795
1796 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1797 string otherwise requires a connection and a bunch more work and it's
1798 relatively easy to get wrong. Should also expose TLS library linkage
1799 problems.
1800
1801 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1802 64-bit ${eval} (JH/03).
1803
1804 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1805 GNU libc to support some of the 64-bit stuff, should not lead to
1806 conflicts. Defined before os.h is pulled in, so if a given platform
1807 needs to override this, it can.
1808
1809 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1810 protection layer was required, which is not implemented.
1811 Bugzilla 1254, patch from Wolfgang Breyha.
1812
1813 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1814 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1815 tls_dhparam take prime identifiers. Also unbreak combination of
1816 OpenSSL+DH_params+TLSSNI.
1817
1818 PP/39 Disable SSLv2 by default in OpenSSL support.
1819
1820
1821 Exim version 4.77
1822 -----------------
1823
1824 PP/01 Solaris build fix for Oracle's LDAP libraries.
1825 Bugzilla 1109, patch from Stephen Usher.
1826
1827 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1828
1829 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1830 whitespace trailer
1831
1832 TF/02 Fix a couple more cases where we did not log the error message
1833 when unlink() failed. See also change 4.74-TF/03.
1834
1835 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1836 lock up or crash if it happened to be inside a call to libc when it
1837 got a SIGUSR1 from exiwhat.
1838
1839 The SIGUSR1 handler appends the current process status to the process
1840 log which is later printed by exiwhat. It used to use the general
1841 purpose logging code to do this, but several functions it calls are
1842 not safe for signals.
1843
1844 The new output code in the SIGUSR1 handler is specific to the process
1845 log, and simple enough that it's easy to inspect for signal safety.
1846 Removing some special cases also simplifies the general logging code.
1847 Removing the spurious timestamps from the process log simplifies
1848 exiwhat.
1849
1850 TF/04 Improved ratelimit ACL condition.
1851
1852 The /noupdate option has been deprecated in favour of /readonly which
1853 has clearer semantics. The /leaky, /strict, and /readonly update modes
1854 are mutually exclusive. The update mode is no longer included in the
1855 database key; it just determines when the database is updated. (This
1856 means that when you upgrade Exim will forget old rate measurements.)
1857
1858 Exim now checks that the per_* options are used with an update mode that
1859 makes sense for the current ACL. For example, when Exim is processing a
1860 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1861 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1862 must specify per_mail/readonly. If you omit the update mode it defaults to
1863 /leaky where that makes sense (as before) or /readonly where required.
1864
1865 The /noupdate option is now undocumented but still supported for
1866 backwards compatibility. It is equivalent to /readonly except that in
1867 ACLs where /readonly is required you may specify /leaky/noupdate or
1868 /strict/noupdate which are treated the same as /readonly.
1869
1870 A useful new feature is the /count= option. This is a generalization
1871 of the per_byte option, so that you can measure the throughput of other
1872 aggregate values. For example, the per_byte option is now equivalent
1873 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1874
1875 The per_rcpt option has been generalized using the /count= mechanism
1876 (though it's more complicated than the per_byte equivalence). When it is
1877 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1878 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1879 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1880 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1881 Note that using per_rcpt with a non-readonly update mode in more than
1882 one ACL will cause the recipients to be double-counted. (The per_mail
1883 and per_byte options don't have this problem.)
1884
1885 The handling of very low rates has changed slightly. If the computed rate
1886 is less than the event's count (usually one) then this event is the first
1887 after a long gap. In this case the rate is set to the same as this event's
1888 count, so that the first message of a spam run is counted properly.
1889
1890 The major new feature is a mechanism for counting the rate of unique
1891 events. The new per_addr option counts the number of different
1892 recipients that someone has sent messages to in the last time period. It
1893 behaves like per_rcpt if all the recipient addresses are different, but
1894 duplicate recipient addresses do not increase the measured rate. Like
1895 the /count= option this is a general mechanism, so the per_addr option
1896 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1897 example, measure the rate that a client uses different sender addresses
1898 with the options per_mail/unique=$sender_address. There are further
1899 details in the main documentation.
1900
1901 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1902
1903 TF/06 Removed a few PCRE remnants.
1904
1905 TF/07 Automatically extract Exim's version number from tags in the git
1906 repository when doing development or release builds.
1907
1908 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1909 Bugzilla 879. Patch from Paul Fisher.
1910
1911 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1912 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1913 Bugzilla 97.
1914
1915 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1916
1917 PP/05 Variable $av_failed, true if the AV scanner deferred.
1918 Bugzilla 1078. Patch from John Horne.
1919
1920 PP/06 Stop make process more reliably on build failure.
1921 Bugzilla 1087. Patch from Heiko Schlittermann.
1922
1923 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1924 Bugzilla 1089. Patch from Heiko Schlittermann.
1925
1926 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1927 Bugzilla 1131. Patch from Holger Weiß.
1928
1929 PP/09 Handle IPv6 addresses with SPF.
1930 Bugzilla 860. Patch from Wolfgang Breyha.
1931
1932 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1933 Bugzilla 1156.
1934 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1935 Bugzilla 1095.
1936
1937 PP/11 match_* no longer expand right-hand-side by default.
1938 New compile-time build option, EXPAND_LISTMATCH_RHS.
1939 New expansion conditions, "inlist", "inlisti".
1940
1941 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1942
1943 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1944
1945 PP/14 fix log_write() format string regression from TF/03.
1946 Bugzilla 1152. Patch from Dmitry Isaikin.
1947
1948
1949 Exim version 4.76
1950 -----------------
1951
1952 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1953
1954 PP/02 Harmonised TLS library version reporting; only show if debugging.
1955 Layout now matches that introduced for other libraries in 4.74 PP/03.
1956
1957 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1958
1959 PP/04 New "dns_use_edns0" global option.
1960
1961 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1962 Bugzilla 1098.
1963
1964 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1965 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1966
1967 TK/01 Updated PolarSSL code to 0.14.2.
1968 Bugzilla 1097. Patch from Andreas Metzler.
1969
1970 PP/07 Catch divide-by-zero in ${eval:...}.
1971 Fixes bugzilla 1102.
1972
1973 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1974 Bugzilla 1104.
1975
1976 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1977 format-string attack -- SECURITY: remote arbitrary code execution.
1978
1979 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1980 time unintentionally subject to list matching rules, letting the header
1981 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1982 arbitrary string expansion). This allowed for information disclosure.
1983
1984 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1985 INT_MIN/-1 -- value coerced to INT_MAX.
1986
1987
1988 Exim version 4.75
1989 -----------------
1990
1991 NM/01 Workaround for PCRE version dependency in version reporting
1992 Bugzilla 1073
1993
1994 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1995 This fixes portability to compilers other than gcc, notably
1996 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1997
1998 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1999 makefiles for portability to HP-UX and POSIX correctness.
2000
2001 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2002 Also via indented variable definition in the Makefile.
2003 (Debugging by Oliver Heesakkers).
2004
2005 PP/02 Restore caching of spamd results with expanded spamd_address.
2006 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2007
2008 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2009 Improves build reliability. Fix from: Frank Elsner
2010
2011 NM/02 Fix wide character breakage in the rfc2047 coding
2012 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2013
2014 NM/03 Allow underscore in dnslist lookups
2015 Fixes bug 1026. Patch from Graeme Fowler
2016
2017 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2018 Code patches from Adam Ciarcinski of NetBSD.
2019
2020 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2021 Fixes bug 943.
2022
2023 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2024 is logged, to avoid truncation. Patch from John Horne.
2025
2026 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2027 Patch from Jakob Hirsch.
2028
2029 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2030 SQL string expansion failure details.
2031 Patch from Andrey Oktyabrski.
2032
2033 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2034 Patch from Simon Arlott.
2035
2036 PP/09 New lookups functionality failed to compile on old gcc which rejects
2037 extern declarations in function scope.
2038 Patch from Oliver Fleischmann
2039
2040 PP/10 Use sig_atomic_t for flags set from signal handlers.
2041 Check getgroups() return and improve debugging.
2042 Fixed developed for diagnosis in bug 927 (which turned out to be
2043 a kernel bug).
2044
2045 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2046 Patch from Mark Zealey.
2047
2048 PP/12 Bugzilla 1056: Improved spamd server selection.
2049 Patch from Mark Zealey.
2050
2051 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2052 Based on patch from Heiko Schlittermann.
2053
2054 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2055 Patch from Uwe Doering, sign-off by Michael Haardt.
2056
2057 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2058 variable declaration deep within a block. Bug and patch from
2059 Dennis Davis.
2060
2061 PP/15 lookups-Makefile IRIX compatibility coercion.
2062
2063 PP/16 Make DISABLE_DKIM build knob functional.
2064
2065 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2066 Patch by Simon Arlott
2067
2068 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2069 variable argument macros. Our copy now differs from upstream.
2070
2071
2072 Exim version 4.74
2073 -----------------
2074
2075 TF/01 Failure to get a lock on a hints database can have serious
2076 consequences so log it to the panic log.
2077
2078 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2079 controlled using the smtp_confirmation log selector.
2080
2081 TF/03 Include the error message when we fail to unlink a spool file.
2082
2083 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2084 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2085 for maintaining out-of-tree patches for some time.
2086
2087 PP/01 Bugzilla 139: Documentation and portability issues.
2088 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2089 Handle per-OS dynamic-module compilation flags.
2090
2091 PP/02 Let /dev/null have normal permissions.
2092 The 4.73 fixes were a little too stringent and complained about the
2093 permissions on /dev/null. Exempt it from some checks.
2094 Reported by Andreas M. Kirchwitz.
2095
2096 PP/03 Report version information for many libraries, including
2097 Exim version information for dynamically loaded libraries. Created
2098 version.h, now support a version extension string for distributors
2099 who patch heavily. Dynamic module ABI change.
2100
2101 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2102 privilege escalation vulnerability whereby the Exim run-time user
2103 can cause root to append content of the attacker's choosing to
2104 arbitrary files.
2105
2106 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2107 (Wolfgang Breyha)
2108
2109 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2110 If dropping privileges for untrusted macros, we disabled normal logging
2111 on the basis that it would fail; for the Exim run-time user, this is not
2112 the case, and it resulted in successful deliveries going unlogged.
2113 Fixed. Reported by Andreas Metzler.
2114
2115
2116 Exim version 4.73
2117 -----------------
2118
2119 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2120 only prepend for the Resent-* case. Fixes regression introduced in
2121 Exim 4.70 by NM/22 for Bugzilla 607.
2122
2123 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2124 increasing numbers of administrators be bitten by this.
2125
2126 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2127
2128 PP/03 Bugzilla 994: added openssl_options main configuration option.
2129
2130 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2131
2132 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2133
2134 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2135
2136 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2137 without a peer certificate, leading to a segfault because of an
2138 assumption that peers always have certificates. Be a little more
2139 paranoid. Problem reported by Martin Tscholak.
2140
2141 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2142 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2143 NB: ClamAV planning to remove STREAM in "middle of 2010".
2144 CL also introduces -bmalware, various -d+acl logging additions and
2145 more caution in buffer sizes.
2146
2147 PP/09 Implemented reverse_ip expansion operator.
2148
2149 PP/10 Bugzilla 937: provide a "debug" ACL control.
2150
2151 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2152
2153 PP/12 Bugzilla 973: Implement --version.
2154
2155 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2156
2157 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2158
2159 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2160
2161 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2162 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2163 ignore trailing whitespace.
2164
2165 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2166
2167 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2168 "exim" to be used
2169
2170 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2171 Notification from Dr Andrew Aitchison.
2172
2173 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2174 ExtendedDetectionInfo response format.
2175 Notification from John Horne.
2176
2177 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2178 compatible.
2179
2180 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2181 XSL and documented dependency on system catalogs, with examples of how
2182 it normally works.
2183
2184 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2185 access.
2186
2187 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2188 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2189 configuration file which is writeable by the Exim user or group.
2190
2191 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2192 of configuration files to cover files specified with the -C option if
2193 they are going to be used with root privileges, not just the default
2194 configuration file.
2195
2196 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2197 option (effectively making it always true).
2198
2199 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2200 files to be used while preserving root privileges.
2201
2202 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2203 that rogue child processes cannot use them.
2204
2205 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2206 run-time user, instead of root.
2207
2208 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2209 Exim run-time user without dropping privileges.
2210
2211 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2212 result string, instead of calling string_vformat() twice with the same
2213 arguments.
2214
2215 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2216 for other users. Others should always drop root privileges if they use
2217 -C on the command line, even for a whitelisted configure file.
2218
2219 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2220
2221 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2222
2223
2224 Exim version 4.72
2225 -----------------
2226
2227 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2228 $data_path, and $header_path variables; fixed documentation bugs and
2229 typos
2230
2231 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2232 exipick to access non-standard spools, including the "frozen" queue
2233 (Finput)
2234
2235 NM/01 Bugzilla 965: Support mysql stored procedures.
2236 Patch from Alain Williams
2237
2238 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2239
2240 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2241 Patch from Andreas Metzler
2242
2243 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2244 Patch from Kirill Miazine
2245
2246 NM/05 Bugzilla 671: Added umask to procmail example.
2247
2248 JJ/03 installed exipick 20100323.0, fixing doc bug
2249
2250 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2251 directory. Notification and patch from Dan Rosenberg.
2252
2253 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2254
2255 TK/02 Improve log output when DKIM signing operation fails.
2256
2257 MH/01 Treat the transport option dkim_domain as a colon separated
2258 list, not as a single string, and sign the message with each element,
2259 omitting multiple occurences of the same signer.
2260
2261 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2262 Bugzilla 985, 986. Patch by Simon Arlott
2263
2264 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2265 Patch by Simon Arlott
2266
2267 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2268 MBX locking. Notification from Dan Rosenberg.
2269
2270
2271 Exim version 4.71
2272 -----------------
2273
2274 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2275
2276 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2277
2278 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2279
2280 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2281
2282 NM/04 Bugzilla 915: Flag broken perl installation during build.
2283
2284
2285 Exim version 4.70
2286 -----------------
2287
2288 TK/01 Added patch by Johannes Berg that expands the main option
2289 "spamd_address" if it starts with a dollar sign.
2290
2291 TK/02 Write list of recipients to X-Envelope-Sender header when building
2292 the mbox-format spool file for content scanning (suggested by Jakob
2293 Hirsch).
2294
2295 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2296 (http://www.dcc-servers.net/) support via dccifd. Activated by
2297 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2298
2299 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2300 by Mark Daniel Reidel <mr@df.eu>.
2301
2302 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2303 When building exim an external PCRE library is now needed -
2304 PCRE is a system library on the majority of modern systems.
2305 See entry on PCRE_LIBS in EDITME file.
2306
2307 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2308 conversation. Added nologin parameter to request.
2309 Patch contributed by Kirill Miazine.
2310
2311 TF/01 Do not log submission mode rewrites if they do not change the address.
2312
2313 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2314
2315 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2316 log files in place. Contributed by Roberto Lima.
2317
2318 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2319
2320 TF/03 Bugzilla 615: When checking the local_parts router precondition
2321 after a local_part_suffix or local_part_prefix option, Exim now
2322 does not use the address's named list lookup cache, since this
2323 contains cached lookups for the whole local part.
2324
2325 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2326 Robert Millan. Documentation is in experimental-spec.txt.
2327
2328 TF/04 Bugzilla 668: Fix parallel build (make -j).
2329
2330 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2331
2332 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2333 Patch provided by Jan Srzednicki.
2334
2335 TF/05 Leading white space used to be stripped from $spam_report which
2336 wrecked the formatting. Now it is preserved.
2337
2338 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2339 that they are available at delivery time.
2340
2341 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2342
2343 TF/08 TLS error reporting now respects the incoming_interface and
2344 incoming_port log selectors.
2345
2346 TF/09 Produce a more useful error message if an SMTP transport's hosts
2347 setting expands to an empty string.
2348
2349 NM/06 Bugzilla 744: EXPN did not work under TLS.
2350 Patch provided by Phil Pennock.
2351
2352 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2353 Patch provided by Richard Godbee.
2354
2355 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2356 acl_smtp_notquit, added index entry.
2357
2358 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2359 Patch provided by Eugene Bujak.
2360
2361 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2362 accept(). Patch provided by Maxim Dounin.
2363
2364 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2365 Patch provided by Phil Pennock.
2366
2367 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2368
2369 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2370 Patch provided by Brad "anomie" Jorsch.
2371
2372 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2373 Patch provided by Dean Brooks.
2374
2375 TK/05 Add native DKIM support (does not depend on external libraries).
2376
2377 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2378 Patch provided by Graeme Fowler.
2379
2380 NM/16 Bugzilla 851: Documentation example syntax fix.
2381
2382 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2383
2384 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2385 lsearch.
2386
2387 NM/19 Bugzilla 745: TLS version reporting.
2388 Patch provided by Phil Pennock.
2389
2390 NM/20 Bugzilla 167: bool: condition support.
2391 Patch provided by Phil Pennock.
2392
2393 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2394 clients. Patch provided by Phil Pennock.
2395
2396 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2397 Patch provided by Brad "anomie" Jorsch.
2398
2399 NM/23 Bugzilla 687: Fix misparses in eximstats.
2400 Patch provided by Heiko Schlittermann.
2401
2402 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2403 Patch provided by Heiko Schlittermann.
2404
2405 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2406 plus update to original patch.
2407
2408 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2409
2410 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2411 Patch provided by David Brownlee.
2412
2413 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2414
2415 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2416
2417 NM/30 Bugzilla 888: TLS documentation bugfixes.
2418
2419 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2420
2421 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2422 Unlike the original bugzilla I have changed all shell scripts in src tree.
2423
2424 NM/33 Bugzilla 898: Transport filter timeout fix.
2425 Patch by Todd Rinaldo.
2426
2427 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2428 Patch by Serge Demonchaux.
2429
2430 NM/35 Bugzilla 39: Base64 decode bug fixes.
2431 Patch by Jakob Hirsch.
2432
2433 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2434
2435 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2436
2437 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2438
2439 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2440
2441
2442 Exim version 4.69
2443 -----------------
2444
2445 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2446 ALT-N's libdkim that I have put here:
2447 http://duncanthrax.net/exim-experimental/
2448
2449 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2450 were called 'true' and it seems that C99 defines that as a reserved
2451 keyword to be used with 'bool' variable types. That means you could
2452 not include C99-style headers which use bools without triggering
2453 build errors in sieve.c.
2454
2455 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2456 as mailq or other aliases. Changed the --help handling significantly
2457 to do whats expected. exim_usage() emits usage/help information.
2458
2459 SC/01 Added the -bylocaldomain option to eximstats.
2460
2461 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2462
2463 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2464
2465 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2466
2467
2468 Exim version 4.68
2469 -----------------
2470
2471 PH/01 Another patch from the Sieve maintainer.
2472
2473 PH/02 When an IPv6 address is converted to a string for single-key lookup
2474 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2475 dots are used instead of colons so that keys in lsearch files need not
2476 contain colons. This was done some time before quoting was made available
2477 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2478 (notated using the quote facility) so as to distinguish them from IPv4
2479 keys. This meant that lookups for IP addresses in host lists did not work
2480 for iplsearch lookups.
2481
2482 This has been fixed by arranging for IPv6 addresses to be expressed with
2483 colons if the lookup type is iplsearch. This is not incompatible, because
2484 previously such lookups could never work.
2485
2486 The situation is now rather anomalous, since one *can* have colons in
2487 ordinary lsearch keys. However, making the change in all cases is
2488 incompatible and would probably break a number of configurations.
2489
2490 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2491 version.
2492
2493 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2494 conversion specification without a maximum field width, thereby enabling
2495 a rogue spamd server to cause a buffer overflow. While nobody in their
2496 right mind would setup Exim to query an untrusted spamd server, an
2497 attacker that gains access to a server running spamd could potentially
2498 exploit this vulnerability to run arbitrary code as the Exim user.
2499
2500 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2501 $primary_hostname instead of what libspf2 thinks the hosts name is.
2502
2503 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2504 a directory entry by the name of the lookup key. Previously, if a
2505 symlink pointed to a non-existing file or a file in a directory that
2506 Exim lacked permissions to read, a lookup for a key matching that
2507 symlink would fail. Now it is enough that a matching directory entry
2508 exists, symlink or not. (Bugzilla 503.)
2509
2510 PH/03 The body_linecount and body_zerocount variables are now exported in the
2511 local_scan API.
2512
2513 PH/04 Added the $dnslist_matched variable.
2514
2515 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2516 This means they are set thereafter only if the connection becomes
2517 encrypted.
2518
2519 PH/06 Added the client_condition to authenticators so that some can be skipped
2520 by clients under certain conditions.
2521
2522 PH/07 The error message for a badly-placed control=no_multiline_responses left
2523 "_responses" off the end of the name.
2524
2525 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2526
2527 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2528 (without spaces) instead of just copying the configuration text.
2529
2530 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2531
2532 PH/11 Added $max_received_linelength.
2533
2534 PH/12 Added +ignore_defer and +include_defer to host lists.
2535
2536 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2537 way in which PCRE > 7.0 is built.
2538
2539 PH/14 Implemented queue_only_load_latch.
2540
2541 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2542 MAIL command. The effect was to mangle the value on 64-bit systems.
2543
2544 PH/16 Another patch from the Sieve maintainer.
2545
2546 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2547
2548 PH/18 If a system quota error occurred while trying to create the file for
2549 a maildir delivery, the message "Mailbox is full" was not appended to the
2550 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2551 only to a quota excession during the actual writing of the file.
2552
2553 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2554 characters?) which causes problems in log lines. The DN values are now
2555 passed through string_printing() before being added to log lines.
2556
2557 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2558 and InterBase are left for another time.)
2559
2560 PH/21 Added message_body_newlines option.
2561
2562 PH/22 Guard against possible overflow in moan_check_errorcopy().
2563
2564 PH/23 POSIX allows open() to be a macro; guard against that.
2565
2566 PH/24 If the recipient of an error message contained an @ in the local part
2567 (suitably quoted, of course), incorrect values were put in $domain and
2568 $local_part during the evaluation of errors_copy.
2569
2570
2571 Exim version 4.67
2572 -----------------
2573
2574 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2575 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2576 Jan Srzednicki.
2577
2578 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2579 issue a MAIL command.
2580
2581 PH/02 In an ACL statement such as
2582
2583 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2584
2585 if a client was not listed at all, or was listed with a value other than
2586 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2587 the condition was not true (as it should be), so access was not denied.
2588 The bug was that the ! inversion was incorrectly passed on to the second
2589 item. This has been fixed.
2590
2591 PH/03 Added additional dnslists conditions == and =& which are different from
2592 = and & when the dns lookup returns more than one IP address.
2593
2594 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2595 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2596
2597 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2598 FSYNC, which compiles an option called disable_fsync that allows for
2599 bypassing fsync(). The documentation is heavily laced with warnings.
2600
2601 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2602
2603 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2604 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2605 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2606 including adding "make clean"; (3) Added -fPIC when compiling the test
2607 dynamically loaded module, to get rid of a warning.
2608
2609 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2610 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2611 = 0s. The bug is otherwise harmless.
2612
2613 PH/07 There was a bug in the dovecot authenticator such that the value of
2614 $auth1 could be overwritten, and so not correctly preserved, after a
2615 successful authentication. This usually meant that the value preserved by
2616 the server_setid option was incorrect.
2617
2618 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2619
2620 PH/09 Installed PCRE release 7.0.
2621
2622 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2623 run for batched SMTP input. It is now run at the start of every message
2624 in the batch. While fixing this I discovered that the process information
2625 (output by running exiwhat) was not always getting set for -bs and -bS
2626 input. This is fixed, and it now also says "batched" for BSMTP.
2627
2628 PH/11 Added control=no_pipelining.
2629
2630 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2631 patch, slightly modified), and move the expansion of helo_data till after
2632 the connection is made in the smtp transport (so it can use these
2633 values).
2634
2635 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2636
2637 PH/14 Added log_selector = +pid.
2638
2639 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2640
2641 PH/16 Add ${if forany and ${if forall.
2642
2643 PH/17 Added dsn_from option to vary the From: line in DSNs.
2644
2645 PH/18 Flush SMTP output before performing a callout, unless control =
2646 no_callout_flush is set.
2647
2648 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2649 was true (the default) a successful delivery failed to delete the retry
2650 item, thus causing premature timeout of the address. The bug is now
2651 fixed.
2652
2653 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2654
2655 PH/21 Long custom messages for fakedefer and fakereject are now split up
2656 into multiline responses in the same way that messages for "deny" and
2657 other ACL rejections are.
2658
2659 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2660 with slight modification.
2661
2662 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2663 draft, changing the syntax and factoring some duplicate code".
2664
2665 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2666 for deliveries of the second and subsequent messages over the same SMTP
2667 connection.
2668
2669 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2670 ${reduce, with only minor "tidies".
2671
2672 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2673
2674 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2675 expansion side effects.
2676
2677 PH/27 When a message times out after an over-quota error from an Exim-imposed
2678 quota, the bounce message says "mailbox is full". This message was not
2679 being given when it was a system quota that was exceeded. It now should
2680 be the same.
2681
2682 MH/03 Made $recipients available in local_scan(). local_scan() already has
2683 better access to the recipient list through recipients_list[], but
2684 $recipients can be useful in postmaster-provided expansion strings.
2685
2686 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2687 in the case of a MAIL command with additional options following the
2688 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2689 were accidentally chopped off.
2690
2691 PH/29 SMTP synchronization checks are implemented when a command is read -
2692 there is a check that no more input is waiting when there shouldn't be
2693 any. However, for some commands, a delay in an ACL can mean that it is
2694 some time before the response is written. In this time, more input might
2695 arrive, invalidly. So now there are extra checks after an ACL has run for
2696 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2697 pipelining has not been advertised.
2698
2699 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2700
2701 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2702 returned in the SMTP response when smtp_return_error_details was false.
2703 This has been fixed.
2704
2705 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2706 instead of the C I/O that was originally supplied, because problems were
2707 reported on Solaris.
2708
2709 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2710 Exim which did not show up earlier: it was assuming that a call to
2711 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2712 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2713 was a macro that became an assignment, so it seemed to work. This has
2714 changed to a proper function call with a void return, hence the compile
2715 error. Exim's code has been fixed.
2716
2717 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2718 cpus.
2719
2720 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2721
2722 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2723
2724 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2725 because it turns out to be too big or there is a timeout) there is no
2726 "Completed" line in the log. When some messages of this type were
2727 selected by exigrep, they were listed as "not completed". Others were
2728 picked up by some special patterns. I have improved the selection
2729 criteria to be more general.
2730
2731 PH/38 The host_find_failed option in the manualroute router can now be set
2732 to "ignore", to completely ignore a host whose IP address cannot be
2733 found. If all hosts are ignored, the behaviour is controlled by the new
2734 host_all_ignored option.
2735
2736 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2737 homing or because of multiple MX records with /mx) generated more than
2738 one IP address, and the following item turned out to be the local host,
2739 all the secondary addresses of the first item were incorrectly removed
2740 from the list, along with the local host and any following hosts (which
2741 is what is supposed to happen).
2742
2743 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2744 whoever called Exim into the -H file. In the case of the daemon it was
2745 behaving confusingly. When first started, it used values for whoever
2746 started the daemon, but after a SIGHUP it used the Exim user (because it
2747 calls itself on a restart). I have changed the code so that it now always
2748 uses the Exim user.
2749
2750 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2751 message are rejected with the same error (e.g. no authentication or bad
2752 sender address), and a DATA command is nevertheless sent (as can happen
2753 with PIPELINING or a stupid MUA), the error message that was given to the
2754 RCPT commands is included in the rejection of the DATA command. This is
2755 intended to be helpful for MUAs that show only the final error to their
2756 users.
2757
2758 PH/42 Another patch from the Sieve maintainer.
2759
2760 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2761 Eximstats - Fixed some broken HTML links and added missing column headers
2762 (Jez Hancock).
2763 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2764 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2765
2766 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2767
2768 PH/43 Yet another patch from the Sieve maintainer.
2769
2770 PH/44 I found a way to check for a TCP/IP connection going away before sending
2771 the response to the final '.' that terminates a message, but only in the
2772 case where the client has not sent further data following the '.'
2773 (unfortunately, this is allowed). However, in many cases there won't be
2774 any further data because there won't be any more messages to send. A call
2775 to select() can be used: if it shows that the input is "ready", there is
2776 either input waiting, or the socket has been closed. An attempt to read
2777 the next input character can distinguish the two cases. Previously, Exim
2778 would have sent an OK response which the client would never have see.
2779 This could lead to message repetition. This fix should cure that, at
2780 least in a lot of common cases.
2781
2782 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2783 advertised in response to EHLO.
2784
2785
2786 Exim version 4.66
2787 -----------------
2788
2789 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2790 fixed by 4.65/MH/01 (is this a record?) are fixed:
2791
2792 (i) An empty string was always treated as zero by the numeric comparison
2793 operators. This behaviour has been restored.
2794
2795 (ii) It is documented that the numeric comparison operators always treat
2796 their arguments as decimal numbers. This was broken in that numbers
2797 starting with 0 were being interpreted as octal.
2798
2799 While fixing these problems I realized that there was another issue that
2800 hadn't been noticed. Values of message_size_limit (both the global option
2801 and the transport option) were treated as octal if they started with 0.
2802 The documentation was vague. These values are now always treated as
2803 decimal, and I will make that clear in the documentation.
2804
2805
2806 Exim version 4.65
2807 -----------------
2808
2809 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2810 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2811 versions. (#438)
2812
2813 MH/01 Don't check that the operands of numeric comparison operators are
2814 integers when their expansion is in "skipping" mode (fixes bug
2815 introduced by 4.64-PH/07).
2816
2817 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2818 child addresses, Exim now panics and dies. Previously, because the count
2819 is held in a short int, deliveries were likely to be lost. As such a
2820 large number of recipients for a single message is ridiculous
2821 (performance will be very, very poor), I have chosen to impose a limit
2822 rather than extend the field.
2823
2824
2825 Exim version 4.64
2826 -----------------
2827
2828 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2829 leftover -K file (the existence of which was triggered by #402).
2830 While we were at it, introduced process PID as part of the -K
2831 filename. This should rule out race conditions when creating
2832 these files.
2833
2834 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2835 processing considerably. Previous code took too long for large mails,
2836 triggering a timeout which in turn triggers #401.
2837
2838 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2839 in the DK code in transports.c. sendfile() is not really portable,
2840 hence the _LINUX specificness.
2841
2842 TF/01 In the add_headers option to the mail command in an Exim filter,
2843 there was a bug that Exim would claim a syntax error in any
2844 header after the first one which had an odd number of characters
2845 in the field name.
2846
2847 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2848 callout verification, Exim cached a "reject" for the entire domain. This
2849 is correct for most verifications, but it is not correct for a recipient
2850 verification with use_sender or use_postmaster set, because in that case
2851 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2852 case of MAIL FROM:<> rejection from other early rejections (e.g.
2853 rejection of HELO). When verifying a recipient using a non-null MAIL
2854 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2855 Whatever the result of the callout, the value of the domain cache is
2856 left unchanged (for any other kind of callout, getting as far as trying
2857 RCPT means that the domain itself is ok).
2858
2859 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2860 gcc 4.1.1 threw up.
2861
2862 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2863 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2864 session, the daemon ignores ECONNECT errors and logs others; it now
2865 ignores EPIPE as well.
2866
2867 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2868 (quoted-printable decoding).
2869
2870 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2871 later the small subsequent patch to fix an introduced bug.
2872
2873 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2874
2875 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2876
2877 PH/08 An error is now given if message_size_limit is specified negative.
2878
2879 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2880 to be given (somewhat) arbitrary names.
2881
2882 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2883 in 4.64-PH/09.
2884
2885 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2886 miscellaneous code fixes
2887
2888 PH/10 Added the log_reject_target ACL modifier to specify where to log
2889 rejections.
2890
2891 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2892 hostname. This is wrong, because it relates to the incoming message (and
2893 probably the interface on which it is arriving) and not to the outgoing
2894 callout (which could be using a different interface). This has been
2895 changed to use the value of the helo_data option from the smtp transport
2896 instead - this is what is used when a message is actually being sent. If
2897 there is no remote transport (possible with a router that sets up host
2898 addresses), $smtp_active_hostname is used.
2899
2900 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2901 tweaks were necessary in order to get it to work (see also 21 below):
2902 (a) The code assumed that strncpy() returns a negative number on buffer
2903 overflow, which isn't the case. Replaced with Exim's string_format()
2904 function.
2905 (b) There were several signed/unsigned issues. I just did the minimum
2906 hacking in of casts. There is scope for a larger refactoring.
2907 (c) The code used strcasecmp() which is not a standard C function.
2908 Replaced with Exim's strcmpic() function.
2909 (d) The code set only $1; it now sets $auth1 as well.
2910 (e) A simple test gave the error "authentication client didn't specify
2911 service in request". It would seem that Dovecot has changed its
2912 interface. Fortunately there's a specification; I followed it and
2913 changed what the client sends and it appears to be working now.
2914
2915 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2916 decoding.
2917
2918 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2919 address A is aliased to B and C, where B exists and C does not. Without
2920 -v the output is "A verified" because verification stops after a
2921 successful redirection if more than one address is generated. However,
2922 with -v the child addresses are also verified. Exim was outputting "A
2923 failed to verify" and then showing the successful verification for C,
2924 with its parentage. It now outputs "B failed to verify", showing B's
2925 parentage before showing the successful verification of C.
2926
2927 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2928 look up a TXT record in a specific list after matching in a combined
2929 list.
2930
2931 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2932 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2933 they consult the DNS. I had assumed they would set it the way they
2934 wanted; and indeed my experiments on Linux seem to show that in some
2935 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2936 To be on the safe side, however, I have now made the interface to
2937 host_find_byname() similar to host_find_bydns(), with an argument
2938 containing the DNS resolver options. The host_find_byname() function now
2939 sets these options at its start, just as host_find_bydns() does. The smtp
2940 transport options dns_qualify_single and dns_search_parents are passed to
2941 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2942 of host_find_byname() use the default settings of RES_DEFNAMES
2943 (qualify_single) but not RES_DNSRCH (search_parents).
2944
2945 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2946 spool_read_header() do less string testing, by means of a preliminary
2947 switch on the second character of optional "-foo" lines. (This is
2948 overdue, caused by the large number of possibilities that now exist.
2949 Originally there were few.) While I was there, I also converted the
2950 str(n)cmp tests so they don't re-test the leading "-" and the first
2951 character, in the hope this might squeeze out yet more improvement.
2952
2953 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2954 flag allowing group syntax was set by the header_syntax check but not
2955 turned off, possible causing trouble later; (2) The flag was not being
2956 set at all for the header_verify test, causing "group"-style headers to
2957 be rejected. I have now set it in this case, and also caused header_
2958 verify to ignore an empty address taken from a group. While doing this, I
2959 came across some other cases where the code for allowing group syntax
2960 while scanning a header line wasn't quite right (mostly, not resetting
2961 the flag correctly in the right place). These bugs could have caused
2962 trouble for malformed header lines. I hope it is now all correct.
2963
2964 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2965 with the "reply" argument non-NULL. The code, however (which originally
2966 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2967 but it didn't always do it. This confused somebody who was copying the
2968 code for some other use. I have removed all the tests.
2969
2970 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2971 feature that was used to support insecure browsers during the U.S. crypto
2972 embargo. It requires special client support, and Exim is probably the
2973 only MTA that supported it -- and would never use it because real RSA is
2974 always available. This code has been removed, because it had the bad
2975 effect of slowing Exim down by computing (never used) parameters for the
2976 RSA_EXPORT functionality.
2977
2978 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2979 authenticator to fail if there's a tab character in the incoming data
2980 (there should never be unless someone is messing about, as it's supposed
2981 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2982 if the connection is using TLS or if the remote IP is the same as the
2983 local IP, and the "valid-client-cert option" if a client certificate has
2984 been verified.
2985
2986 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2987 authenticators. This can be used for authorization after authentication
2988 succeeds. (In the case of plaintext, it servers for both authentication
2989 and authorization.)
2990
2991 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2992 if any retry times were supplied.
2993
2994 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2995 connection, where there is no client IP address to check. In this
2996 situation, the verify now always succeeds.
2997
2998 PH/25 Applied John Jetmore's -Mset patch.
2999
3000 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3001
3002 PH/27 In a string expansion for a processed (not raw) header when multiple
3003 headers of the same name were present, leading whitespace was being
3004 removed from all of them, but trailing whitespace was being removed only
3005 from the last one. Now trailing whitespace is removed from each header
3006 before concatenation. Completely empty headers in a concatenation (as
3007 before) are ignored.
3008
3009 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3010 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3011
3012 PH/29 [Removed. This was a change that I later backed out, and forgot to
3013 correct the ChangeLog entry (that I had efficiently created) before
3014 committing the later change.]
3015
3016 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3017 address errors (4xx response to RCPT) over the same connection as other
3018 messages routed to the same hosts. Such deliveries are always "forced",
3019 so retry times are not inspected. This resulted in far too many retries
3020 for the affected addresses. The effect occurred only when there were more
3021 hosts than the hosts_max_try setting in the smtp transport when it had
3022 the 4xx errors. Those hosts that it had tried were not added to the list
3023 of hosts for which the message was waiting, so if all were tried, there
3024 was no problem. Two fixes have been applied:
3025
3026 (i) If there are any address or message errors in an SMTP delivery, none
3027 of the hosts (tried or untried) are now added to the list of hosts
3028 for which the message is waiting, so the message should not be a
3029 candidate for sending over the same connection that was used for a
3030 successful delivery of some other message. This seems entirely
3031 reasonable: after all the message is NOT "waiting for some host".
3032 This is so "obvious" that I'm not sure why it wasn't done
3033 previously. Hope I haven't missed anything, but it can't do any
3034 harm, as the worst effect is to miss an optimization.
3035
3036 (ii) If, despite (i), such a delivery is accidentally attempted, the
3037 routing retry time is respected, so at least it doesn't keep
3038 hammering the server.
3039
3040 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3041 in ${readsocket because some servers need this prod.
3042
3043 PH/32 Added some extra debug output when updating a wait-xxx database.
3044
3045 PH/33 The hint "could be header name not terminated by colon", which has been
3046 given for certain expansion errors for a long time, was not being given
3047 for the ${if def:h_colon_omitted{... case.
3048
3049 PH/34 The spec says: "With one important exception, whenever a domain list is
3050 being scanned, $domain contains the subject domain." There was at least
3051 one case where this was not true.
3052
3053 PH/35 The error "getsockname() failed: connection reset by peer" was being
3054 written to the panic log as well as the main log, but it isn't really
3055 panic-worthy as it just means the connection died rather early on. I have
3056 removed the panic log writing for the ECONNRESET error when getsockname()
3057 fails.
3058
3059 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3060 runs only) independently of the message's sender address. This meant
3061 that, if the 4xx error was in fact related to the sender, a different
3062 message to the same recipient with a different sender could confuse
3063 things. In particular, this can happen when sending to a greylisting
3064 server, but other circumstances could also provoke similar problems.
3065 I have changed the default so that the retry time for these errors is now
3066 based a combination of the sender and recipient addresses. This change
3067 can be overridden by setting address_retry_include_sender=false in the
3068 smtp transport.
3069
3070 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3071 remote server are returned as part of bounce messages. This was not
3072 happening for LMTP over a pipe (the lmtp transport), but now it is the
3073 same for both kinds of LMTP.
3074
3075 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3076 in header lines that were in fact CNAMEs. This is no longer the case.
3077
3078 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3079 and queue runs started by the daemon processed all messages. This has
3080 been fixed so that -R and -S can now usefully be given with -q<time>.
3081
3082 PH/40 Import PCRE release 6.7 (fixes some bugs).
3083
3084 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3085
3086 PH/42 Give an error if -q is specified more than once.
3087
3088 PH/43 Renamed the variables $interface_address and $interface_port as
3089 $received_ip_address and $received_port, to make it clear that these
3090 values apply to message reception, and not to the outgoing interface when
3091 a message is delivered. (The old names remain recognized, of course.)
3092
3093 PH/44 There was no timeout on the connect() call when using a Unix domain
3094 socket in the ${readsocket expansion. There now is.
3095
3096 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3097 be meaningful with "accept".
3098
3099 SC/01 Eximstats V1.43
3100 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3101
3102 SC/02 Eximstats V1.44
3103 Use a glob alias rather than an array ref in the generated
3104 parser. This improves both readability and performance.
3105
3106 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3107 Collect SpamAssassin and rejection statistics.
3108 Don't display local sender or destination tables unless
3109 there is data to show.
3110 Added average volumes into the top table text output.
3111
3112 SC/04 Eximstats V1.46
3113 Collect data on the number of addresses (recipients)
3114 as well as the number of messages.
3115
3116 SC/05 Eximstats V1.47
3117 Added 'Message too big' to the list of mail rejection
3118 reasons (thanks to Marco Gaiarin).
3119
3120 SC/06 Eximstats V1.48
3121 Mainlog lines which have GMT offsets and are too short to
3122 have a flag are now skipped.
3123
3124 SC/07 Eximstats V1.49 (Alain Williams)
3125 Added the -emptyok flag.
3126
3127 SC/08 Eximstats V1.50
3128 Fixes for obtaining the IP address from reject messages.
3129
3130 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3131 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3132 whitespace changes from 4.64-PH/27
3133
3134 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3135 match 4.64-PH/13
3136
3137 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3138 are found, allow negative numbers in numeric criteria)
3139
3140 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3141
3142 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3143 to match changes made in 4.64-PH/43
3144
3145 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3146
3147 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3148 "domain" is actually an IP address, and force a failure. This locks out
3149 those revolvers/nameservers that support "A-for-A" lookups, in
3150 contravention of the specifications.
3151
3152 PH/48 When a host name was looked up from an IP address, and the subsequent
3153 forward lookup of the name timed out, the host name was left in
3154 $sender_host_name, contrary to the specification.
3155
3156 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3157 restricted to single-key lookups, Exim was not diagnosing an error if
3158 * or *@ was used with a query-style lookup.
3159
3160 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3161
3162 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3163 long ago, but noone interested enough thought of it. Let's just say that
3164 the "1.1" means that there are some new functions that weren't there at
3165 some point in the past.
3166
3167 PH/51 Error processing for expansion failure of helo_data from an smtp
3168 transport during callout processing was broken.
3169
3170 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3171 tested/used via the -bh/-bhc/-bs options.
3172
3173 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3174 bug, fixed in subsequent PCRE releases).
3175
3176 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3177 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3178
3179 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3180
3181
3182 Exim version 4.63
3183 -----------------
3184
3185 SC/01 Use a glob alias rather than an array ref in eximstats generated
3186 parser. This improves both readability and performance.
3187
3188 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3189 Don't display local sender or destination tables in eximstats unless
3190 there is data to show.
3191 Added average volumes into the eximstats top table text output.
3192
3193 SC/03 Collect data on the number of addresses (recipients) as well
3194 as the number of messages in eximstats.
3195
3196 TF/01 Correct an error in the documentation for the redirect router. Exim
3197 does (usually) call initgroups() when daemonizing.
3198
3199 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3200 with consistent privilege compared to when running as a daemon.
3201
3202 TF/03 Note in the spec that $authenticated_id is not set for local
3203 submissions from trusted users.
3204
3205 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3206 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3207
3208 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3209 by adding some example configuration directives to the default
3210 configuration file. A little bit of work is required to uncomment the
3211 directives and define how usernames and passwords are checked, but
3212 there is now a framework to start from.
3213
3214 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3215 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3216 without this. I don't know how relevant this is to other LDAP libraries.
3217
3218 PH/02 Add the verb name to the "unknown ACL verb" error.
3219
3220 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3221
3222 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3223
3224 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3225 directory not expanded when it should be if an expanded home directory
3226 was set for the address (which is overridden by the transport).
3227
3228 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3229 libradius.
3230
3231 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3232 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3233 because it is too late at that time, and has no effect.
3234
3235 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3236 security issue with \' (bugzilla #107). I could not use the
3237 PQescapeStringConn() function, because it needs a PGconn value as one of
3238 its arguments.
3239
3240 PH/08 When testing addresses using -bt, indicate those final addresses that
3241 are duplicates that would not cause an additional delivery. At least one
3242 person was confused, thinking that -bt output corresponded to deliveries.
3243 (Suppressing duplicates isn't a good idea as you lose the information
3244 about possibly different redirections that led to the duplicates.)
3245
3246 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3247 systems where poll() doesn't work, in particular OS X.
3248
3249 PH/10 Added more information to debugging output for retry time not reached.
3250
3251 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3252 operations in malware.c.
3253
3254 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3255 signatures.
3256
3257 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3258 syslog_duplication set false, log lines that would normally be written
3259 both the the main log and to the reject log were not written to syslog at
3260 all.
3261
3262 PH/14 In the default configuration, change the use of "message" in ACL warn
3263 statements to "add_header".
3264
3265 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3266 not followed by a command (e.g. "seen endif").
3267
3268 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3269 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3270 latter.
3271
3272 PH/17 Added extra conditions to the default value of delay_warning_condition
3273 so that it is now:
3274
3275 ${if or { \
3276 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3277 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3278 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3279 }{no}{yes}}
3280
3281 The Auto-Submitted: and various List- headers are standardised, whereas I
3282 don't think Precedence: ever was.
3283
3284 PH/18 Refactored debugging code in route_finduser() to show more information,
3285 in particular, the error code if getpwnam() issues one.
3286
3287 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3288 This is apparently needed in addition to the PH/07 change above to avoid
3289 any possible encoding problems.
3290
3291 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3292 but not after initializing Perl.
3293
3294 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3295 output them only if debugging. By default they are written stderr,
3296 apparently, which is not desirable.
3297
3298 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3299 queries.
3300
3301 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3302 --not options
3303
3304 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3305
3306 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3307 authenticated or an ident call has been made. Suppress the default
3308 values for $authenticated_id and $authenticated_sender (but permit -oMai
3309 and -oMas) when testing with -bh.
3310
3311 PH/24 Re-jigged the order of the tests in the default configuration so that the
3312 tests for valid domains and recipients precede the DNS black list and CSA
3313 tests, on the grounds that those ones are more expensive.
3314
3315 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3316 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3317 This bug exists in every version of Exim that I still have, right back to
3318 0.12.
3319
3320 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3321 However, an attempt to turn on case-sensitivity in a regex key by
3322 including (?-i) didn't work because the subject string was already
3323 lowercased, and the effects were non-intuitive. It turns out that a
3324 one-line patch can be used to allow (?-i) to work as expected.
3325
3326
3327 Exim version 4.62
3328 -----------------
3329
3330 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3331 other effects) broke the use of negated acl sub-conditions.
3332
3333 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3334 patch).
3335
3336 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3337 "Deny" causes Exim to reject the incoming connection with a 554 error.
3338 Unfortunately, if there is a major crisis, such as a disk failure,
3339 tcp-wrappers gives "deny", whereas what one would like would be some
3340 kind of temporary error. A kludge has been added to help with this.
3341 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3342 554 error is used if errno is still zero or contains ENOENT (which occurs
3343 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3344 451 error is used.
3345
3346 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3347
3348 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3349 errors. Otherwise a message that provokes a temporary error (when other
3350 messages do not) can cause a whole host to time out.
3351
3352 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3353 addresses were routed directly to files or pipes from a redirect router.
3354 File deliveries just didn't batch; pipe deliveries might have suffered
3355 odd errors.
3356
3357 PH/06 A failure to get a lock for a hints database would erroneously always say
3358 "Failed to get write lock", even when it was really a read lock.
3359
3360 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3361 of 0600. This has been changed to use the value of the lockfile_mode
3362 option (which defaults to 0600).
3363
3364 PH/08 Applied small patch from the Sieve maintainer.
3365
3366 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3367 folder from quota calculations, a direct delivery into this folder messed
3368 up the contents of the maildirsize file. This was because the regex was
3369 used only to exclude .Trash (or whatever) when the size of the mailbox
3370 was calculated. There was no check that a delivery was happening into an
3371 excluded directory. This bug has been fixed by ignoring all quota
3372 processing for deliveries into excluded directories.
3373
3374 PH/10 Added the maildirfolder_create_regex option to appendfile.
3375
3376
3377 Exim version 4.61
3378 -----------------
3379
3380 PH/01 The code for finding all the local interface addresses on a FreeBSD
3381 system running IPv6 was broken. This may well have applied to all BSD
3382 systems, as well as to others that have similar system calls. The broken
3383 code found IPv4 interfaces correctly, but gave incorrect values for the
3384 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3385 that it would not match correctly against @[] and not recognize the IPv6
3386 addresses as local.
3387
3388 PH/02 The ipliteral router was not recognizing addresses of the form user@
3389 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3390
3391 PH/03 Added disable_ipv6.
3392
3393 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3394 decoded form, because it is most often used to construct To: headers
3395 lines in autoreplies, and the decoded form may well be syntactically
3396 invalid. However, $reply_address has leading white space removed, and all
3397 newlines turned into spaces so that the autoreply transport does not
3398 grumble.
3399
3400 PH/05 If group was specified without a user on a router, and no group or user
3401 was specified on a transport, the group from the router was ignored.
3402
3403 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3404 for visible compile-time settings that can be used to change these
3405 numbers, for those that want even more. Backwards compatibility with old
3406 spool files has been maintained. However, going back to a previous Exim
3407 release will lost any variables that are in spool files.
3408
3409 PH/07 Two small changes when running in the test harness: increase delay when
3410 passing a TCP/IP connection to a new process, in case the original
3411 process has to generate a bounce, and remove special handling of
3412 127.0.0.2 (sic), which is no longer necessary.
3413
3414 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3415 be the same on different OS.
3416
3417 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3418 testing.
3419
3420 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3421 whether --show-vars was specified or not
3422
3423 JJ/02 exipick: Added support for new ACL variable spool format introduced
3424 in 4.61-PH/06
3425
3426 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3427 syntactically invalid From: or Reply-to: line, and a filter used this to
3428 generate an autoreply, and therefore failed to obtain an address for the
3429 autoreply, Exim could try to deliver to a non-existent relative file
3430 name, causing unrelated and misleading errors. What now happens is that
3431 it logs this as a hard delivery error, but does not attempt to create a
3432 bounce message.
3433
3434 PH/11 The exinext utility has a -C option for testing purposes, but although
3435 the given file was scanned by exinext itself; it wasn't being passed on
3436 when Exim was called.
3437
3438 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3439 an end-of-file indication when reading a command response.
3440
3441 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3442 compiled. In many other places in Exim, IPv6 addresses are always
3443 recognized, so I have changed this. It also means that IPv4 domain
3444 literals of the form [IPV4:n.n.n.n] are now always recognized.
3445
3446 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3447 used if the router is not running as root, for example, when verifying at
3448 ACL time, or when using -bh. The debugging output from this situation was
3449 non-existent - all you got was a failure to exec. I have made two
3450 changes:
3451
3452 (a) Failures to set uid/gid, the current directory, or a process leader
3453 in a subprocess such as that created by queryprogram now generate
3454 suitable debugging output when -d is set.
3455
3456 (b) The queryprogram router detects when it is not running as root,
3457 outputs suitable debugging information if -d is set, and then runs
3458 the subprocess without attempting to change uid/gid.
3459
3460 PH/15 Minor change to Makefile for building test_host (undocumented testing
3461 feature).
3462
3463 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3464 additional section of a DNS packet that returns MX or SRV records.
3465 Instead, it always explicitly searches for A/AAAA records. This avoids
3466 major problems that occur when a DNS server includes only records of one
3467 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3468 fixed another bug: if SRV records were looked up and the corresponding
3469 address records were *not* found in the additional section, the port
3470 values from the SRV records were lost.
3471
3472 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3473 using the correct key (the original address) when searching the retry
3474 rules in order to find which one to use for generating the retry hint.
3475
3476 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3477 adding the default one. Similarly, if it contains a Reply-To: header, the
3478 errors_reply_to option, if set, is not used.
3479
3480 PH/19 When calculating a retry time, Exim used to measure the "time since
3481 failure" by looking at the "first failed" field in the retry record. Now
3482 it does not use this if it is later than than the arrival time of the
3483 message. Instead it uses the arrival time. This makes for better
3484 behaviour in cases where some deliveries succeed, thus re-setting the
3485 "first failed" field. An example is a quota failure for a huge message
3486 when small messages continue to be delivered. Without this change, the
3487 "time since failure" will always be short, possible causing more frequent
3488 delivery attempts for the huge message than are intended.
3489 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3490
3491 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3492 $1, $2, $3) because the numerical variables can be reset during some
3493 expansion items (e.g. "match"), thereby losing the authentication data.
3494
3495 PH/21 Make -bV show the size of off_t variables so that the test suite can
3496 decide whether to run tests for quotas > 2G.
3497
3498 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3499 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3500 filecount value is greater than 2G or if a quota value is greater than 2G
3501 on a system where the size of off_t is not greater than 4, a panic error
3502 is given.
3503
3504 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3505 never match. The debug and -bh output now contains an explicit error
3506 message indicating a malformed IPv4 address or mask.
3507
3508 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3509 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3510 PH/23 above applies.
3511
3512 PH/25 Do not write to syslog when running in the test harness. The only
3513 occasion when this arises is a failure to open the main or panic logs
3514 (for which there is an explicit test).
3515
3516 PH/26 Added the /no_tell option to "control=freeze".
3517
3518 PH/27 If a host name lookup failed very early in a connection, for example, if
3519 the IP address matched host_lookup and the reverse lookup yielded a name
3520 that did not have a forward lookup, an error message of the form "no IP
3521 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3522 could be logged. Now it outputs the IP address instead of "NULL".
3523
3524 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3525 allows the sender and the authenticated sender to be set when
3526 submitting a message from within Exim. Since child_open_exim() is
3527 documented for local_scan(), the new function should be too.
3528
3529 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3530 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3531 results in an empty string is now treated as unset.
3532
3533 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3534
3535 PH/31 Added sender_verify_fail logging option.
3536
3537 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3538 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3539 tidied the source and removed it altogether.
3540
3541 PH/33 When a queue run was abandoned because the load average was too high, a
3542 log line was always written; now it is written only if the queue_run log
3543 selector is set. In addition, the log line for abandonment now contains
3544 information about the queue run such as the pid. This is always present
3545 in "start" and "stop" lines but was omitted from the "abandon" line.
3546
3547 PH/34 Omit spaces between a header name and the colon in the error message that
3548 is given when verify = headers_syntax fails (if there are lots of them,
3549 the message gets confusing).
3550
3551 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3552 names, as there are now some PTR records that contain slashes. This check
3553 is only to protect against broken name servers that fall over on strange
3554 characters, so the fact that it applies to all lookups doesn't matter.
3555
3556 PH/36 Now that the new test suite is complete, we can remove some of the
3557 special code in Exim that was needed for the old test suite. For example,
3558 sorting DNS records because real resolvers return them in an arbitrary
3559 order. The new test suite's fake resolver always returns records in the
3560 same order.
3561
3562 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3563 bounces) except when queue_only is set, to avoid logging races between
3564 the different processes.
3565
3566 PH/38 Panic-die if .include specifies a non-absolute path.
3567
3568 PH/39 A tweak to the "H" retry rule from its user.
3569
3570 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3571 a label. They prevented compilation on older perls.
3572
3573 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3574 a warning to be raised on newish perls.
3575
3576 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3577 on queue. Changes to match documented behaviour of showing count of
3578 messages matching specified criteria.
3579
3580 PH/40 Changed the default ident timeout from 30s to 5s.
3581
3582 PH/41 Added support for the use of login_cap features, on those BSD systems
3583 that have them, for controlling the resources used by pipe deliveries.
3584
3585 PH/42 The content-scanning code uses fopen() to create files in which to put
3586 message data. Previously it was not paying any attention to the mode of
3587 the files. Exim runs with umask(0) because the rest of the code creates
3588 files with open(), and sets the required mode explicitly. Thus, these
3589 files were ending up world-writeable. This was not a big issue, because,
3590 being within the spool directory, they were not world-accessible. I have
3591 created a function called modefopen, which takes an additional mode
3592 argument. It sets umask(777), creates the file, chmods it to the required
3593 mode, then resets the umask. All the relevant calls to fopen() in the
3594 content scanning code have been changed to use this function.
3595
3596 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3597 to 24 hours. This avoids potential overflow problems when processing G
3598 and H retry rules. I suspect nobody ever tinkers with this value.
3599
3600 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3601
3602 PH/45 When the plaintext authenticator is running as a client, the server's
3603 challenges are checked to ensure they are valid base64 strings. By
3604 default, the authentication attempt is cancelled if an invalid string is
3605 received. Setting client_ignore_invalid_base64 true ignores these errors.
3606 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3607 they are received. Thus, the responses can be made to depend on the
3608 challenges. If an invalid string is ignored, an empty string is placed in
3609 the variable.
3610
3611 PH/46 Messages that are created by the autoreply transport now contains a
3612 References: header, in accordance with RFCs 2822 and 3834.
3613
3614 PH/47 Added authenticated_sender_force to the smtp transport.
3615
3616 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3617
3618 PH/49 Installed latest patch from the Sieve maintainer.
3619
3620 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3621 was also set, the appendfile transport was unnecessarily scanning a
3622 directory of message files (e.g. for maildir delivery) to find the count
3623 of files (along with the size), even though it did not need this
3624 information. It now does the scan only if it needs to find either the
3625 size of the count of files.
3626
3627 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3628
3629 PH/52 Two bugs concerned with error handling when the smtp transport is
3630 used in LMTP mode:
3631
3632 (i) Exim was not creating retry information for temporary errors given
3633 for individual recipients after the DATA command when the smtp transport
3634 was used in LMTP mode. This meant that they could be retried too
3635 frequently, and not timed out correctly.
3636
3637 (ii) Exim was setting the flag that allows error details to be returned
3638 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3639 recipients that were returned after the DATA command.
3640
3641 PH/53 This is related to PH/52, but is more general: for any failing address,
3642 when detailed error information was permitted to be returned to the
3643 sender, but the error was temporary, then after the final timeout, only
3644 "retry timeout exceeded" was returned. Now it returns the full error as
3645 well as "retry timeout exceeded".
3646
3647 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3648 do this, and (what is worse) MTAs that accept it.
3649
3650 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3651 will now be deprecated.
3652
3653 PH/56 New os.c-cygwin from the Cygwin maintainer.
3654
3655 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3656 formats (previously only available in exim formats via -bpr, -bpru,
3657 and -bpra. Now also available in native and exiqgrep formats)
3658
3659 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3660 with very large, slow to parse queues
3661
3662 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3663
3664 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3665
3666 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3667 responses to authentication challenges, though it was showing the
3668 challenges; (ii) I've removed the CR characters from the debug output for
3669 SMTP output lines.
3670
3671 PH/58 Allow for the insertion of a newline as well as a space when a string
3672 is turned into more than one encoded-word during RFC 2047 encoding. The
3673 Sieve code now uses this.
3674
3675 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3676 data_4xx, lost_connection, tls_required.
3677
3678 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3679 message was being sent as an SMTP response.
3680
3681 PH/61 Add -l and -k options to exicyclog.
3682
3683 PH/62 When verifying, if an address was redirected to one new address, so that
3684 verification continued, and the new address failed or deferred after
3685 having set something in $address_data, the value of $address_data was not
3686 passed back to the ACL. This was different to the case when no
3687 redirection occurred. The value is now passed back in both cases.
3688
3689 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3690 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3691 use login_cap.h, so on its own it isn't the distinguishing feature. The
3692 new name refers directly to the setclassresources() function.
3693
3694 PH/65 Added configuration files for NetBSD3.
3695
3696 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3697
3698 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3699 is preferred over IPv4.
3700
3701 PH/68 The bounce_return_message and bounce_return_body options were not being
3702 honoured for bounces generated during the reception of non-SMTP messages.
3703 In particular, this applied to messages rejected by the ACL. This bug has
3704 been fixed. However, if bounce_return_message is true and bounce_return_
3705 body is false, the headers that are returned for a non-SMTP message
3706 include only those that have been read before the error was detected.
3707 (In the case of an ACL rejection, they have all been read.)
3708
3709 PH/69 The HTML version of the specification is now built in a directory called
3710 spec_html instead of spec.html, because the latter looks like a path with
3711 a MIME-type, and this confuses some software.
3712
3713 PH/70 Catch two compiler warnings in sieve.c.
3714
3715 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3716 function verify_get_ident() calls ip_connect() to connect a socket, but
3717 if the "connect()" function timed out, ip_connect() used to close the
3718 socket. However, verify_get_ident() also closes the socket later, and in
3719 between Exim writes to the log, which may get opened at this point. When
3720 the socket was closed in ip_connect(), the log could get the same file
3721 descriptor number as the socket. This naturally causes chaos. The fix is
3722 not to close the socket in ip_connect(); the socket should be closed by
3723 the function that creates it. There was only one place in the code where
3724 this was missing, in the iplookup router, which I don't think anybody now
3725 uses, but I've fixed it anyway.
3726
3727 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3728 well as to direct DNS lookups. Otherwise the handling of names in host
3729 lists is inconsistent and therefore confusing.
3730
3731
3732 Exim version 4.60
3733 -----------------
3734
3735 PH/01 Two changes to the default runtime configuration:
3736
3737 (1) Move the checks for relay_from_hosts and authenticated clients from
3738 after to before the (commented out) DNS black list checks.
3739
3740 (2) Add control=submission to the relay_from_hosts and authenticated
3741 clients checks, on the grounds that messages accepted by these
3742 statements are most likely to be submissions.
3743
3744 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3745
3746 (1) Generate an error if the third argument for the ${prvs expansion is
3747 not a single digit.
3748
3749 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3750 string.
3751
3752 (3) Reset the variables that are obtained from the first argument of
3753 ${prvscheck and used in the second argument before leaving the code,
3754 because their memory is reclaimed, so using them afterwards may do
3755 silly things.
3756
3757 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3758 one (it's much easier than Tom thought :-).
3759
3760 (5) Because of (4), we can now allow for the use of $prvscheck_result
3761 inside the third argument.
3762
3763 PH/03 For some reason, the default setting of PATH when running a command from
3764 a pipe transport was just "/usr/bin". I have changed it to
3765 "/bin:/usr/bin".
3766
3767 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3768 anything to be listed in the output from -bV.
3769
3770 PH/05 When a filter generated an autoreply, the entire To: header line was
3771 quoted in the delivery log line, like this:
3772
3773 => >A.N.Other <ano@some.domain> <original@ddress> ...
3774
3775 This has been changed so that it extracts the operative address. There
3776 may be more than one such address. If so, they are comma-separated, like
3777 this:
3778
3779 => >ano@some.domain,ona@other.domain <original@ddress> ...
3780
3781 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3782 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3783 not being looked up in the rDNS to get a host name, Exim was showing the
3784 IP address twice in Received: lines, even though the IP addresses were
3785 identical. For example:
3786
3787 Received: from [1.2.3.4] (helo=[1.2.3.4])
3788
3789 However, if the real host name was known, it was omitting the HELO data
3790 if it matched the actual IP address. This has been tidied up so that it
3791 doesn't show the same IP address twice.
3792
3793 PH/07 When both +timestamp and +memory debugging was on, the value given by
3794 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3795 called by the debug printing, thereby overwriting the timestamp buffer.
3796 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3797
3798 PH/08 When the original message was included in an autoreply transport, it
3799 always said "this is a copy of the message, including all the headers",
3800 even if body_only or headers_only was set. It now gives an appropriate
3801 message.
3802
3803 PH/09 Applied a patch from the Sieve maintainer which:
3804
3805 o fixes some comments
3806 o adds the (disabled) notify extension core
3807 o adds some debug output for the result of if/elsif tests
3808 o points to the current vacation draft in the documentation
3809 and documents the missing references header update
3810
3811 and most important:
3812
3813 o fixes a bug in processing the envelope test (when testing
3814 multiple envelope elements, the last element determined the
3815 result)
3816
3817 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3818 Electronic Mail") by including:
3819
3820 Auto-submitted: auto-generated
3821
3822 in the messages that it generates (bounce messages and others, such as
3823 warnings). In the case of bounce messages for non-SMTP messages, there was
3824 also a typo: it was using "Auto_submitted" (underscore instead of
3825 hyphen). Since every message generated by Exim is necessarily in response
3826 to another message, thes have all been changed to:
3827
3828 Auto-Submitted: auto-replied
3829
3830 in accordance with these statements in the RFC:
3831
3832 The auto-replied keyword:
3833
3834 - SHOULD be used on messages sent in direct response to another
3835 message by an automatic process,
3836
3837 - MUST NOT be used on manually-generated messages,
3838
3839 - MAY be used on Delivery Status Notifications (DSNs) and Message
3840 Disposition Notifications (MDNs),
3841
3842 - MUST NOT be used on messages generated by automatic or periodic
3843 processes, except for messages which are automatic responses to
3844 other messages.
3845
3846 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3847 to the default Received: header definition.
3848
3849 PH/12 Added log selector acl_warn_skipped (default on).
3850
3851 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3852 variables because (a) they are in the wrong storage pool and (b) even if
3853 they were copied, it wouldn't work properly because of the caching.
3854
3855 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3856 checking when decoding. Apparently there are clients that generate
3857 overlong encoded strings. Why am I not surprised?
3858
3859 PH/15 If the first argument of "${if match_address" was not empty, but did not
3860 contain an "@" character, Exim crashed. Now it writes a panic log message
3861 and treats the condition as false.
3862
3863 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3864
3865 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3866 extension "envelope-auth". The code is finished and in agreement with
3867 other implementations, but there is no documentation so far and in fact,
3868 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3869 not changing the active code.
3870
3871 Print executed "if" and "elsif" statements when debugging is used. This
3872 helps a great deal to understand what a filter does.
3873
3874 Document more things not specified clearly in RFC3028. I had all this
3875 sorted out, when out of a sudden new issues came to my mind. Oops."
3876
3877 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3878 (Bugzilla #53).
3879
3880 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3881 canonical form (as documented). However, after a host name lookup from
3882 the IP address, check_host() was doing a simple string comparison with
3883 addresses acquired from the DNS when checking that the found name did
3884 have the original IP as one of its addresses. Since any found IPv6
3885 addresses are likely to be in abbreviated form, the comparison could
3886 fail. Luckily, there already exists a function for doing the comparison
3887 by converting both addresses to binary, so now that is used instead of
3888 the text comparison.
3889
3890 PH/20 There was another similar case to PH/19, when a complete host name was
3891 given in a host list; looking up its IP address could give an abbreviated
3892 form, whereas the current host's name might or might not be abbreviated.
3893 The same fix has been applied.
3894
3895
3896 Exim version 4.54
3897 -----------------
3898
3899 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3900 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3901 It now does.
3902
3903 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3904 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3905
3906 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3907
3908 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3909 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3910 Also, for "Auto-Submitted", treat anything other than "no" as
3911 non-personal, in accordance with RFC 3834. (Previously it treated
3912 anything starting "auto-" as non-personal.)
3913
3914 TF/01 The control=submission/name=... option had a problem with syntax
3915 errors if the name included a slash character. The /name= option
3916 now slurps the rest of the string, so it can include any characters
3917 but it must come last in the list of options (after /sender_retain
3918 or /domain=).
3919
3920 PH/05 Some modifications to the interface to the fake nameserver for the new
3921 testing suite.
3922
3923
3924
3925 Exim version 4.53
3926 -----------------
3927
3928 TK/01 Added the "success_on_redirect" address verification option. See
3929 NewStuff for rationale and an example.
3930
3931 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3932
3933 PH/02 Patch to exigrep to allow it to work on syslog lines.
3934
3935 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3936 fread() to skip over the body file's header line, because in Cygwin the
3937 header line is locked and is inaccessible.
3938
3939 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3940 co-exist for some time) to make it clear that it is the Exim ID that is
3941 referenced, not the Message-ID: header line.
3942
3943 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3944 string_format() function, because snprintf() does not exist on all
3945 operating systems.
3946
3947 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3948 ${stat: expansion item.
3949
3950 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3951 protocol synchronization error", to keep the pedants happy.
3952
3953 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3954 well as for IRIX systems, when gcc is being used. See the host.c source
3955 file for comments.
3956
3957 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3958
3959 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3960 setting.
3961
3962 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3963 transport and to the smtp transport in LMTP mode.
3964
3965 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3966
3967 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3968 run a filter in a subprocess. This could lead to confusion in subsequent
3969 lookups in the parent process. There should also be a search_tidyup() at
3970 the end of the subprocess.
3971
3972 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3973 only if the host matched helo_try_verify_hosts, which caused the
3974 verification to occur when the EHLO/HELO command was issued. The ACL just
3975 tested the remembered result. Now, if a previous verification attempt has
3976 not happened, "verify = helo" does it there and then.
3977
3978 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3979
3980 TK/03 Fix log output including CR from clamd.
3981
3982 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3983 exist provoked a memory error which could cause a segfault.
3984
3985 PH/15 Installed PCRE 6.2
3986
3987 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3988
3989 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3990 of the problem. Specifically, suggested +O2 rather than +O1 for the
3991 HP-UX compiler.
3992
3993 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3994
3995 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3996 record, the port was not correctly logged when the outgoing_port log
3997 selector was set (it logged the transort's default port).
3998
3999 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4000 fallback_hosts, and "hosts" in the smtp transport.
4001
4002 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4003 host errors such as "Connection refused".
4004
4005 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4006 authentication with radiusclient 0.4.9:
4007
4008 - Error returned from rc_read_config was caught wrongly
4009 - Username/password not passed on to radius server due to wrong length.
4010
4011 The presumption is that some radiusclient API changes for 4.51/PH/17
4012 were not taken care of correctly. The code is still untested by me (my
4013 Linux distribution still has 0.3.2 of radiusclient), but it was
4014 contributed by a Radius user.
4015
4016 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4017 expanding the "port" option of the smtp transport.
4018
4019 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4020 while reading a MIME header. Thanks to Tom Hughes for a patch.
4021
4022 PH/24 Include config.h inside local_scan.h so that configuration settings are
4023 available.
4024
4025 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4026 that in an ACL for RCPT (for example), you can examine exactly what was
4027 received.
4028
4029 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4030 commands, but it was not correctly comparing the address with the actual
4031 client host address. Thus, it would show the EHLO address in Received:
4032 header lines when this was not necessary.
4033
4034 PH/27 Added the % operator to ${eval:}.
4035
4036 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4037 it should be ignoring failures (because with -C, for example, it has lost
4038 privilege). It wasn't ignoring creation failures other than "already
4039 exists".
4040
4041 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4042 -bV or -d is used.
4043
4044 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4045 because an input line was too long, either on its own, or by virtue of
4046 too many continuations, the temporary file was not being removed, and the
4047 return code was incorrect.
4048
4049 PH/31 Missing "BOOL" in function definition in filtertest.c.
4050
4051 PH/32 Applied Sieve patches from the maintainer.
4052
4053 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4054
4055 PH/33 Added "verify = not_blind".
4056
4057 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4058 Local/Makefile (with some defaults set). These are used in built scripts
4059 such as exicyclog, but they have never been used in the exim_install
4060 script (though there are many overriding facilities there). I have
4061 arranged that the exim_install script now takes note of these two
4062 settings.
4063
4064 PH/35 Installed configuration files for Dragonfly.
4065
4066 PH/36 When a locally submitted message by a trusted user did not contain a
4067 From: header, and the sender address was obtained from -f or from an SMTP
4068 MAIL command, and the trusted user did not use -F to supply a sender
4069 name, $originator_name was incorrectly used when constructing a From:
4070 header. Furthermore, $originator_name was used for submission mode
4071 messages from external hosts without From: headers in a similar way,
4072 which is clearly wrong.
4073
4074 PH/37 Added control=suppress_local_fixups.
4075
4076 PH/38 When log_selector = +received_sender was set, and the addition of the
4077 sender made the log line's construction buffer exactly full, or one byte
4078 less than full, an overflow happened when the terminating "\n" was
4079 subsequently added.
4080
4081 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4082 when the result of a list match is failure because a DNS lookup failed.
4083
4084 PH/40 RM_COMMAND is now used in the building process.
4085
4086 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4087 the "build-* directories that it finds.
4088
4089 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4090 address in a domain literal was a prefix of an interface address.
4091
4092 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4093 when verifying a sender address, unless rewrite_headers is false.
4094
4095 PH/44 Wrote a long comment about why errors_to addresses are verified as
4096 recipients, not senders.
4097
4098 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4099 the ratelimit ACL was added.
4100
4101 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4102
4103 PH/46 Added extra information about PostgreSQL errors to the error string.
4104
4105 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4106 avoiding the need to install special zones in a real server. This is
4107 backwards compatible; if it can't find the fake resolver, it drops back.
4108 Thus, both old and new test suites can be run.
4109
4110 TF/02 Added util/ratelimit.pl
4111
4112 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4113 clock is set back in time.
4114
4115 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4116 Candler <B.Candler@pobox.com>.
4117
4118 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4119 OK for addresses that are the result of redirections.
4120
4121 PH/48 A number of further additions for the benefit of the new test suite,
4122 including a fake gethostbyname() that interfaces to the fake DNS resolver
4123 (see PH/47 above).
4124
4125 TF/06 The fix for widen_domains has also been applied to qualify_single and
4126 search_parents which are the other dnslookup options that can cause
4127 header rewrites.
4128
4129 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4130 type ("H").
4131
4132 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4133
4134 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4135 service" if it encountered an MX record with an empty target hostname.
4136 The message is now "an MX or SRV record indicated no SMTP service".
4137
4138 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4139 if the DNS of the sending site is misconfigured. This is quite a
4140 common situation. This change restores the behaviour of treating a
4141 helo verification defer as a failure.
4142
4143 PH/51 If self=fail was set on a router, the bounce message did not include the
4144 actual error message.
4145
4146
4147 Exim version 4.52
4148 -----------------
4149
4150 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4151
4152 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4153 command itself ended in error, the underlying message about the transport
4154 filter timeout was being overwritten with the pipe command error. Now the
4155 underlying error message should be appended to the second error message.
4156
4157 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4158
4159 PH/02 Reduce the amount of output that "make" produces by default. Full output
4160 can still be requested.
4161
4162 PH/03 The warning log line about a condition test deferring for a "warn" verb