1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
10 side, to decode a TLS 1.3 packet capture.
12 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
13 Previously the default library behaviour applied, sending two, each in
16 JH/03 Debug output for ACL now gives the config file name and line number for
19 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
21 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
23 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
24 buffer overrun for (non-chunking) other transports.
26 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
27 TLS1.3, means that a server rejecting a client certificate is not visible
28 to the client until the first read of encrypted data (typically the
29 response to EHLO). Add detection for that case and treat it as a failed
30 TLS connection attempt, so that the normal retry-in-clear can work (if
33 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
34 and/or domain. Found and fixed by Jason Betts.
36 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
37 configuration). If a CNAME target was not a wellformed name pattern, a
40 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
41 the OS reports them interleaved with other addresses.
43 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
44 used both for input and for a verify callout, both encrypted, SMTP
45 responses being sent by the server could be lost. This resulted in
46 dropped connections and sometimes bounces generated by a peer sending
49 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
50 string. Previously it was possible to cause undefined behaviour in a
51 library routine (usually a crash). Found by "zerons".
53 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
56 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
57 API was removed, so update to use the newer ones.
59 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
60 any timeout set, is taking a long time. Previously we would hang on to a
61 rotated logfile "forever" if the input was arriving with long gaps
62 (a previous attempt to fix addressed lack, for a long time, of initial
65 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
66 shared (NFS) environment. The length of the tempfile name is now
67 4 + 16 ("hdr.$message_exim_id") which might break on file
68 systems which restrict the file name length to lower values.
71 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
72 shared (NFS) environment.
74 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
75 did for all versions <4.90). Notably -M, -m, --invert, -I may be
78 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
79 on some platforms for bit 31.
81 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
82 to changes apparently associated with TLS1.3 handling some of the APIs
83 previously used were either nonfunctional or inappropriate. Strings
84 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
85 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
86 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
87 This affects log line X= elements, the $tls_{in,out}_cipher variables,
88 and the use of specific cipher names in the encrypted= ACL condition.
90 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
92 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
93 verification result was not updated unless hosts_require_ocsp applied.
95 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
96 queue_list_requires_admin set to false, non-admin users were denied the
99 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
100 directory-of-certs mode. Previously they were advertised despite the
103 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
104 A single TCP connection by a client will now hold a TLS connection open
105 for multiple message deliveries, by default. Previoud the default was to
108 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
109 default. If built with the facility, DANE will be used. The facility
110 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
112 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
113 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
114 must be defined and you must still, unless you define DISABLE_TLS, manage
115 the the include-dir and library-file requirements that go with that
116 choice. Non-TLS builds are still supported.
118 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
121 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
122 default. If the platform supports and has the facility enabled, it will
123 be requested on all coneections.
125 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
126 controlled by the build-time option SUPPORT_PIPE_CONNECT.
128 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
130 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
131 success-DSN messages. Previously the From: header was always the default
132 one for these; the option was ignored.
134 JH/28 Fix the timeout on smtp response to apply to the whole response.
135 Previously it was reset for every read, so a teergrubing peer sending
136 single bytes within the time limit could extend the connection for a
137 long time. Credit to Qualsys Security Advisory Team for the discovery.
139 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
140 delivery address, which leaked information of the results of local
141 forwarding. Change to the original envelope recipient address, per
144 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
145 requested. Previously not bounce was generated and a log entry of
146 error ignored was made.
148 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
150 JH/32 Introduce a general tainting mechanism for values read from the input
151 channel, and values derived from them. Refuse to expand any tainted
152 values, to catch one form of exploit.
154 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
155 was unused and the unexpanded text used for the test. Found and
156 fixed by Ruben Jenster.
158 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
159 an attempt to use a TLS library read routine dereffed a nul pointer,
162 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
163 them in our smtp response.
165 JH/36 Have the general router option retry_use_local_part default to true when
166 any of the restrictive preconditions are set (to anything). Previously it
167 was only for check_local user. The change removes one item of manual
168 configuration which is required for proper retries when a remote router
169 handles a subset of addresses for a domain.
171 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
172 link count into consideration.
174 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
175 caused the extension of big_buffer, the following lines were ignored.
177 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
178 accordance with RFC 2308. Previously there was no expiry, so a longlived
179 receive process (eg. due to ACL delays) versus a short SOA value could
182 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
184 JH/39 Promote DMARC support to mainline.
186 JH/40 Bug 2452: Add a References: header to DSNs.
188 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
189 parameters. The relevant library call is documented as "Deprecated: This
190 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
191 3.6.0, DH parameters are negotiated following RFC7919."
193 HS/06 Change the default of dnssec_request_domains to "*"
195 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
196 carried on and emitted a BDAT command, even when PIPELINING was not
199 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
200 buffer was used for the filename, resulting in a trap when tainted
201 arguments (eg. $domain) were used.
207 JH/01 Remove code calling the customisable local_scan function, unless a new
208 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
210 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
211 non-signal-safe functions being used.
213 JH/03 Bug 2269: When presented with a received message having a stupidly large
214 number of DKIM-Signature headers, disable DKIM verification to avoid
215 a resource-consumption attack. The limit is set at twenty.
217 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
218 report of oldest_pass in ${authres } in consequence, and separate out
219 some descriptions of reasons for verification fail.
221 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
222 files in the spool were present and unlocked. A queue-runner could spot
223 them, resulting in a duplicate delivery. Fix that by doing the unlock
224 after the unlink. Investigation by Tim Stewart. Take the opportunity to
225 add more error-checking on spoolfile handling while that code is being
228 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
229 No known attacks, no CVE, this is defensive hardening.
231 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
232 a queue-runner could start a delivery while other operations were ongoing.
233 Cutthrough delivery was a common victim, resulting in duplicate delivery.
234 Found and investigated by Tim Stewart. Fix by using the open message data
235 file handle rather than opening another, and not locally closing it (which
236 releases a lock) for that case, while creating the temporary .eml format
237 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
239 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
240 $sender_verify_failure/$recipient_verify_failure to "random".
242 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
245 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
246 Previously this would segfault.
248 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
251 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
252 like zero, since the resolver should be doing this for us, But we need one
253 as a CNAME but no MX presence gets the CNAME returned; we need to check
254 that doesn't point to an MX to declare it "no MX returned" rather than
255 "error, loop". A new main option is added so the older capability of
256 following some limited number of chain links is maintained.
258 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
260 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
261 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
262 now-deprecated earlier definitions used only specified the range up to TLS
263 1.2 (in the older-version library docs).
265 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
267 JH/15 Rework TLS client-side context management. Stop using a global, and
268 explicitly pass a context around. This enables future use of TLS for
269 connections to service-daemons (eg. malware scanning) while a client smtp
270 connection is using TLS; with cutthrough connections this is quite likely.
272 JH/16 Fix ARC verification to do AS checks in reverse order.
274 JH/17 Support a "tls" option on the ${readsocket } expansion item.
276 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
277 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
278 Previously the "utf8" would be re-prepended for every additional message.
280 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
281 Previously thery were accepted, resulting in issues when attempting to
282 forward messages to a non-supporting MTA.
284 PP/02 Let -n work with printing macros too, not just options.
286 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
287 one parent address was copied, and bogus data was used at delivery-logging
288 time. Either a crash (after delivery) or bogus log data could result.
289 Discovery and analysis by Tim Stewart.
291 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
292 Previously if the string ended mid-character, we did not insert the
293 promised '?' replacement.
295 PP/04 Documentation: current string operators work on bytes, not codepoints.
297 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
298 should pack well giving a smaller memory footprint so better caching and
299 therefore performance. Group the declarations where this can't be done so
300 that the byte-sized flag variables are not interspersed among pointer
301 variables, giving a better chance of good packing by the compiler.
303 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
304 non-null, to avoid issues with sites running BATV. Previously reports were
305 sent with an empty envelope sender so looked like bounces.
307 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
308 The ignore_error flag wasn't being returned from the filter subprocess so
309 was not set for later routers. Investigation and fix by Matthias Kurz.
311 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
312 and a msg:complete for the whole, when a message is manually removed using
313 -Mrm. Developement by Matthias Kurz, hacked on by JH.
315 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
316 a "Gnu special" function, asprintf() in the DB utility binary builds; I
317 hope that is portable enough.
319 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
320 requiring a known-CA anchor certificate; make it now rely entirely on the
321 TLSA as an anchor. Checking the name on the leaf cert against the name
322 on the A-record for the host is still done for TA (but not for EE mode).
324 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
325 included in delivery lines for non-proxied connections, when compiled with
326 SUPPORT_SOCKS and running with proxy logging enabled.
328 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
329 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
330 move the existing event to fire before the normal logging of message
331 failure so that custom logging is bracketed by normal logging.
333 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
334 msg:fail:internal event. Developement by Matthias Kurz.
336 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
337 far too small for todays use of crypto signatures stored there. Go all
338 the way to the max DNS message size of 64kB, even though this might be
339 overmuch for IOT constrained device use.
341 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
342 copy a string over itself. The library routine is documented as not
343 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
345 JH/32 For main options check_spool_space and check_inode_space, where the
346 platform supports 64b integers, support more than the previous 2^31 kB
347 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
348 the previous G, M, k.
350 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
351 $authenticated_fail_id variable on authentication failure. Previously
354 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
355 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
356 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
357 GNUTLS_SEC_PARAM_MEDIUM.
359 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
360 side. Previously we would continue as if no SNI had been received.
362 JH/36 Harden the handling of string-lists. When a list consisted of a sole
363 "<" character, which should be a list-separator specification, we walked
364 off past the nul-terimation.
366 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
367 causes) even when the retry time is not yet met. Previously they were
368 not, meaning that when (say) an account was over-quota and temp-rejecting,
369 and multiple senders' messages were queued, only one sender would get
370 notified on each configured delay_warning cycle.
372 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
374 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
375 cipher-suites, an error can be left on the stack even for a succeeding
376 accept; this results in impossible error messages when a later operation
379 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
380 return error codes indicating retry. Under TLS1.3 this becomes required.
382 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
383 it only wrote the new authenticators, resulting in a lack of tracking of
384 peer changes of ESMTP extensions until the next cache flush.
386 JH/41 Fix the loop reading a message header line to check for integer overflow,
387 and more-often against header_maxsize. Previously a crafted message could
388 induce a crash of the recive process; now the message is cleanly rejected.
390 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
391 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
397 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
398 When redis_servers is set to a list of > 1 element, and the Redis servers
399 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
400 case of MOVED into a DEFER case instead, thus moving the query onto the
401 next server in the list. For a cluster of N elements, all N servers must
402 be defined in redis_servers.
404 GF/02 Catch and remove uninitialized value warning in exiqsumm
405 Check for existence of @ARGV before looking at $ARGV[0]
407 JH/01 Replace the store_release() internal interface with store_newblock(),
408 which internalises the check required to safely use the old one, plus
409 the allocate and data copy operations duplicated in both (!) of the
410 extant use locations.
412 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
413 modifier. This matches the restriction on the commandline.
415 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
416 Previously only the last row was returned.
418 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
419 we assumed that tags in the header were well-formed, and parsed the
420 element content after inspecting only the first char of the tag.
421 Assumptions at that stage could crash the receive process on malformed
424 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
425 While running the DKIM ACL we operate on the Permanent memory pool so that
426 variables created with "set" persist to the DATA ACL. Also (at any time)
427 DNS lookups that fail create cache records using the Permanent pool. But
428 expansions release any allocations made on the current pool - so a dnsdb
429 lookup expansion done in the DKIM ACL releases the memory used for the
430 DNS negative-cache, and bad things result. Solution is to switch to the
431 Main pool for expansions.
432 While we're in that code, add checks on the DNS cache during store_reset,
433 active in the testsuite.
434 Problem spotted, and debugging aided, by Wolfgang Breyha.
436 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
437 When none of the hosts presented to a transport match an already-open
438 connection, close it and proceed with the list. Previously we would
439 queue the message. Spotted by Lena with Yahoo, probably involving
442 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
443 Previously a spurious "250 OK id=" response was appended to the proper
446 JH/08 The "support for" informational output now, which built with Content
447 Scanning support, has a line for the malware scanner interfaces compiled
448 in. Interface can be individually included or not at build time.
450 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
451 by the template makefile "src/EDITME". The "STREAM" support for an older
452 ClamAV interface method is removed.
454 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
455 rows affected is given instead).
457 JH/11 The runtime Berkeley DB library version is now additionally output by
458 "exim -d -bV". Previously only the compile-time version was shown.
460 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
461 SMTP connection. Previously, when one had more receipients than the
462 first, an abortive onward connection was made. Move to full support for
463 multiple onward connections in sequence, handling cutthrough connection
464 for all multi-message initiating connections.
466 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
467 routers. Previously, a multi-recipient message would fail to match the
468 onward-connection opened for the first recipient, and cause its closure.
470 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
471 a timeout on read on a GnuTLS initiating connection, resulting in the
472 initiating connection being dropped. This mattered most when the callout
473 was marked defer_ok. Fix to keep the two timeout-detection methods
476 JH/15 Relax results from ACL control request to enable cutthrough, in
477 unsupported situations, from error to silently (except under debug)
478 ignoring. This covers use with PRDR, frozen messages, queue-only and
481 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
483 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
484 metadata, resulting in a crash in free().
486 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
487 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
488 Broken also in d185889f4, with init system revamp.
490 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
491 Previously we abruptly closed the connection after reading a malware-
492 found indication; now we go on to read the "scan ok" response line,
495 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
496 ACL. Previously, a crash would result.
498 JH/19 Speed up macro lookups during configuration file read, by skipping non-
499 macro text after a replacement (previously it was only once per line) and
500 by skipping builtin macros when searching for an uppercase lead character.
502 JH/20 DANE support moved from Experimental to mainline. The Makefile control
503 for the build is renamed.
505 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
506 was allocated for every new TLS startup, meaning one per message. Fix
507 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
509 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
510 reported the original. Fix to report (as far as possible) the ACL
511 result replacing the original.
513 JH/23 Fix memory leak during multi-message connections using STARTTLS under
514 OpenSSL. Certificate information is loaded for every new TLS startup,
515 and the resources needed to be freed.
517 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
519 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
522 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
523 DATA response info to the (existing) per-recipient response info for
524 the "C=" log element. It can have useful tracking info from the
525 destination system. Patch from Simon Arlott.
527 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
528 length value. Previously this would segfault.
530 HS/02 Support Avast multiline protoocol, this allows passing flags to
531 newer versions of the scanner.
533 JH/28 Ensure that variables possibly set during message acceptance are marked
534 dead before release of memory in the daemon loop. This stops complaints
535 about them when the debug_store option is enabled. Discovered specifically
536 for sender_rate_period, but applies to a whole set of variables.
537 Do the same for the queue-runner and queue-list loops, for variables set
538 from spool message files. Do the same for the SMTP per-message loop, for
539 certain variables indirectly set in ACL operations.
541 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
542 as a multi-recipient message from a mailinglist manager). The coding had
543 an arbitrary cutoff number of characters while checking for more input;
544 enforced by writing a NUL into the buffer. This corrupted long / fast
545 input. The problem was exposed more widely when more pipelineing of SMTP
546 responses was introduced, and one Exim system was feeding another.
547 The symptom is log complaints of SMTP syntax error (NUL chars) on the
548 receiving system, and refused recipients seen by the sending system
549 (propating to people being dropped from mailing lists).
550 Discovered and pinpointed by David Carter.
552 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
553 replaced by the ${authresults } expansion.
555 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
557 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
558 allows proper process termination in container environments.
560 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
561 Previously the "final dot" had a newline after it; ensure it is CR,LF.
563 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
564 and "err_perm", deprecated since 4.83 when the RFC-defined words
565 "temperror" and "permerror" were introduced.
567 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
568 transport-filters or DKIM-signing. The restriction was lost in the
569 consolidation of verify-callout and delivery SMTP handling.
570 Extend the restriction to also cover ARC-signing.
572 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
573 in defer=pass mode supply a 450 to the initiator. Previously the message
576 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
577 tls_require_ciphers is used as before.
579 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
580 "pass_unscanned". Only tmpfails from the scanner are written to
581 the paniclog, as they may require admin intervention (permission
582 denied, license issues). Other scanner errors (like decompression
583 bombs) do not cause a paniclog entry.
585 JH/36 Fix reinitialisation of DKIM logging variable between messages.
586 Previously it was possible to log spurious information in receive log
589 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
590 triggered odd behaviour from Outlook Express clients.
592 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
595 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
596 since the IETF WG has not yet settled on that versus the original
597 "bare" representation.
599 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
600 Previously the millisecond value corrupted the output.
601 Fix also for syslog_pid=no and log_selector +pid, for which the pid
602 corrupted the output.
608 JH/01 Rework error string handling in TLS interface so that the caller in
609 more cases is responsible for logging. This permits library-sourced
610 string to be attached to addresses during delivery, and collapses
611 pairs of long lines into single ones.
613 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
614 during configuration. Wildcards are allowed and expanded.
616 JH/02 Rework error string handling in DKIM to pass more info back to callers.
617 This permits better logging.
619 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
620 do not close it down and have the child transport start it up again on
621 the passed-on TCP connection. Instead, proxy the child (and any
622 subsequent ones) for TLS via a unix-domain socket channel. Logging is
623 affected: the continued delivery log lines do not have any DNSSEC, TLS
624 Certificate or OCSP information. TLS cipher information is still logged.
626 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
627 identical IP addresses on different listening ports. Will also affect
630 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
631 add noisy ifdef guards to special-case this sillyness.
632 Patch from Bernd Kuhls.
634 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
635 than 255 are no longer allowed.
637 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
638 Disable the session-cache too, which might reduce our load. Since we
639 currrectly use a new context for every connection, both as server and
640 client, there is no benefit for these.
641 GnuTLS appears to not support tickets server-side by default (we don't
642 call gnutls_session_ticket_enable_server()) but client side is enabled
643 by default on recent versions (3.1.3 +) unless the PFS priority string
646 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
647 <https://reproducible-builds.org/specs/source-date-epoch/>.
649 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
650 the check for any unsuccessful recipients did not notice the limit, and
651 erroneously found still-pending ones.
653 JH/08 Pipeline CHUNKING command and data together, on kernels that support
654 MSG_MORE. Only in-clear (not on TLS connections).
656 JH/09 Avoid using a temporary file during transport using dkim. Unless a
657 transport-filter is involved we can buffer the headers in memory for
658 creating the signature, and read the spool data file once for the
659 signature and again for transmission.
661 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
662 4.77 as the kernel support then wasn't solid, having issues in 64bit
663 mode. Now, it's been long enough. Add support for FreeBSD also.
665 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
666 case where the routing stage had gathered several addresses to send to
667 a host before calling the transport for the first, we previously failed
668 to close down TLS in the old transport process before passing the TCP
669 connection to the new process. The new one sent a STARTTLS command
670 which naturally failed, giving a failed delivery and bloating the retry
671 database. Investigation and fix prototype from Wolfgang Breyha.
673 JH/12 Fix check on SMTP command input synchronisation. Previously there were
674 false-negatives in the check that the sender had not preempted a response
675 or prompt from Exim (running as a server), due to that code's lack of
676 awareness of the SMTP input buffering.
678 PP/04 Add commandline_checks_require_admin option.
679 Exim drops privileges sanely, various checks such as -be aren't a
680 security problem, as long as you trust local users with access to their
681 own account. When invoked by services which pass untrusted data to
682 Exim, this might be an issue. Set this option in main configuration
683 AND make fixes to the calling application, such as using `--` to stop
686 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
687 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
688 responses to those, into a single TLS record each way (this usually means
689 a single packet). As a side issue, smtp_enforce_sync now works on TLS
692 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
693 affects you only if you're dancing at the edge of the param size limits.
694 If you are, and this message makes sense to you, then: raise the
695 configured limit or use OpenSSL 1.1. Nothing we can do for older
698 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
699 cmdline element to get the documented default one. Previously it was
702 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
703 are unsuable for non-message-specific reasons - eg. connection timeout,
704 banner-time rejection.
706 JH/16 Fix logging of delivery remote port, when specified by router, under
709 PP/06 Repair manualroute's ability to take options in any order, even if one
710 is the name of a transport.
713 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
715 JH/17 Change the list-building routines interface to use the expanding-string
716 triplet model, for better allocation and copying behaviour.
718 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
719 Previously it was constructed the first time a possibly-matching string
720 was met in the configuration file input during startup; now it is done
723 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
724 compatible one, to avoid the (poorly documented) possibility of a config
725 file in the working directory redirecting the DB files, possibly correpting
726 some existing file. CVE-2017-10140 assigned for BDB.
728 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
729 cache-hot. Previously, although the result was properly cached, the
730 initial verify call returned a defer.
732 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
733 the main verify for receipient in uncached-mode.
735 JH/22 Retire historical build files to an "unsupported" subdir. These are
736 defined as "ones for which we have no current evidence of testing".
738 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
739 if present. Previously it was ignored.
741 JH/24 Start using specified-initialisers in C structure init coding. This is
742 a C99 feature (it's 2017, so now considered safe).
744 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
745 if was a fixed-sized field and bitmask ops via macros; it is now more
748 PP/07 GitHub PR 56: Apply MariaDB build fix.
749 Patch provided by Jaroslav Škarvada.
751 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
752 during Coverity cleanups [4.87 JH/47]
753 Diagnosis and fix provided by Michael Fischer v. Mollard.
755 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
756 the right size to place the terminating semicolon on its own folded
757 line, the header hash was calculated to an incorrect value thanks to
758 the (relaxed) space the fold became.
760 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
761 and confused the parent.
763 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
764 which could crash as a result. This could lead to undeliverable messages.
766 JH/28 Logging: "next input sent too soon" now shows where input was truncated
769 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
770 matters on fast-turnover and PID-randomising systems, which were getting
771 out-of-order delivery.
773 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
774 a possibly-overlapping copy. The symptom was that "Remote host closed
775 connection in response to HELO" was logged instead of the actual 4xx
778 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
779 Previously only that bufferd was discarded, resulting in SYMTP command
782 JH/32 DKIM: when a message has multiple signatures matching an identity given
783 in dkim_verify_signers, run the dkim acl once for each. Previously only
784 one run was done. Bug 2189.
786 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
787 "panic the current process" to "deliberately defer". The panic log is
788 still written with the problem list name; the mail and reject logs now
789 get a temp-reject line for the message that was being handled, saying
790 something like "domains check lookup or other defer". The SMTP 451
791 message is still "Temporary local problem".
793 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
794 A crafted sequence of BDAT commands could result in in-use memory beeing
795 freed. CVE-2017-16943.
797 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
798 from SMTP input. Previously it was always done; now only done for DATA
799 and not BDAT commands. CVE-2017-16944.
801 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
802 to the message (such as an overlong header line). Previously this was
803 not done and we did not exit BDAT mode. Followon from the previous item
804 though a different problem.
810 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
811 than -2003 did; needs libidn2 in addition to libidn.
813 JH/02 The path option on a pipe transport is now expanded before use.
815 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
816 Patch provided by "Björn", documentation fix added too.
818 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
819 missing a wire-to-host endian conversion.
821 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
822 close after a BDAT command line could be taken as a following command,
823 giving a synch failure. Fix by only checking for synch immediately
824 before acknowledging the chunk.
826 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
827 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
828 macro. Patches provided by Josh Soref.
830 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
831 Previously we did not; the RFC seems ambiguous and VRFY is not listed
832 by IANA as a service extension. However, John Klensin suggests that we
835 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
836 the dkim code may be unix-mode line endings rather than smtp wire-format
837 CRLF, so prepend a CR to any bare LF.
839 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
840 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
842 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
843 the first were themselves being wrongly included in the feed into dkim
844 processing; with most chunk sizes in use this resulted in an incorrect
845 body hash calculated value.
847 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
848 DKIM signature block, for verification. Although advised against by
849 standards it is specifically not ruled illegal.
851 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
853 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
854 missing a body hash (the bh= tag).
856 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
857 It seems that HAProxy sends the Proxy Protocol information in clear and
858 only then does a TLS startup, so do the same.
860 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
861 TCP connections (such as for Spamd) unless the daemon successfully set
862 Fast Open mode on its listening sockets. This fixes breakage seen on
863 too-old kernels or those not configured for Fast Open, at the cost of
864 requiring both directions being enabled for TFO, and TFO never being used
865 by non-daemon-related Exim processes.
867 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
868 endings, at least on the first header line. Try to canonify any that get
869 past that check, despite the cost.
871 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
872 now limited to an arbitrary five deep, while parsing addresses with the
873 strip_excess_angle_brackets option enabled.
875 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
876 instead leave the unprompted TLS handshake in socket buffer for the
877 TLS library to consume.
879 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
881 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
883 JH/16 Drop variables when they go out of scope. Memory management drops a whole
884 region in one operation, for speed, and this leaves assigned pointers
885 dangling. Add checks run only under the testsuite which checks all
886 variables at a store-reset and panics on a dangling pointer; add code
887 explicitly nulling out all the variables discovered. Fixes one known
888 bug: a transport crash, where a dangling pointer for $sending_ip_address
889 originally assigned in a verify callout, is re-used.
891 PP/06 Drop '.' from @INC in various Perl scripts.
893 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
895 PP/08 Reduce a number of compilation warnings under clang; building with
896 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
897 should be warning-free.
899 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
901 HS/01 Fix portability problems introduced by PP/08 for platforms where
902 realloc(NULL) is not equivalent to malloc() [SunOS et al].
904 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
905 chunk. This allows us to accept broken chunked messages. We need a more
906 general solution here.
908 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
909 already-broken messages in the queue.
911 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
913 JH/19 Fix reference counting bug in routing-generated-address tracking.
919 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
920 supports it and a size is available (ie. the sending peer gave us one).
922 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
923 years of being deprecated). The replacements are the ACLs
924 acl_smtp_mime and acl_not_smtp_mime.
926 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
927 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
928 or even an in-clear connection were permitted. Now, if the host lookup
929 was dnssec and dane was requested then the host is only used if the
930 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
931 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
932 if one fails this test.
933 This means that a poorly-configured remote DNS will make it incommunicado;
934 but it protects against a DNS-interception attack on it.
936 JH/04 Bug 1810: make continued-use of an open smtp transport connection
937 non-noisy when a race steals the message being considered.
939 JH/05 If main configuration option tls_certificate is unset, generate a
940 self-signed certificate for inbound TLS connections.
942 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
943 in rewrites and routers.
945 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
946 and logged a warning sing 4.83; now they are a configuration file error.
948 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
949 (lacking @domain). Apply the same qualification processing as RCPT.
951 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
953 JH/10 Support ${sha256:} applied to a string (as well as the previous
956 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
957 a cutthrough deliver is pending, as we always want to make a connection.
958 This also avoids re-routing the message when later placing the cutthrough
959 connection after a verify cache hit.
960 Do not update it with the verify result either.
962 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
963 when routing results in more than one destination address.
965 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
966 signing (which inhibits the cutthrough capability). Previously only
967 the presence of an option was tested; now an expansion evaluating as
968 empty is permissible (obviously it should depend only on data available
969 when the cutthrough connection is made).
971 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
972 the relevant preceding SMTP command did not note the pipelining mode.
974 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
975 Previously they were not counted.
977 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
978 as one having no matching records. Previously we deferred the message
979 that needed the lookup.
981 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
982 distinguished as "(=".
984 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
985 for missing MX records. Previously it only worked for missing A records.
987 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
989 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
990 after the data-go-ahead and data-ack. Patch from Jason Betts.
992 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
993 even for a "none" policy. Patch from Tony Meyer.
995 JH/22 Fix continued use of a connection for further deliveries. If a port was
996 specified by a router, it must also match for the delivery to be
999 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1000 When one of the recipients of a message was unsuitable for the connection
1001 (has no matching addresses), we lost track of needing to mark it
1002 deferred. As a result mail would be lost.
1004 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1006 JH/25 Decoding ACL controls is now done using a binary search; the source code
1007 takes up less space and should be simpler to maintain. Merge the ACL
1008 condition decode tables also, with similar effect.
1010 JH/26 Fix problem with one_time used on a redirect router which returned the
1011 parent address unchanged. A retry would see the parent address marked as
1012 delivered, so not attempt the (identical) child. As a result mail would
1015 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1016 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1017 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1020 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1021 Main config options check_{log,spool}_{inodes,space} are now
1022 100 inodes, 10MB unless set otherwise in the configuration.
1024 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1025 Previously it only applied to the main-section connection policy
1028 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1030 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1031 by me. Added RFC7919 DH primes as an alternative.
1033 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1034 are not in the system include path.
1036 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1037 GnuTLS, when a session startup failed (eg because the client disconnected)
1038 Exim did stdio operations after fclose. This was exposed by a recent
1039 change which nulled out the file handle after the fclose.
1041 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1042 signed directly by the cert-signing cert, rather than an intermediate
1043 OCSP-signing cert. This is the model used by LetsEncrypt.
1045 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1047 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1048 an incoming connection.
1050 HS/02 Bug 1802: Do not half-close the connection after sending a request
1053 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1054 fallback to "prime256v1".
1056 JH/34 SECURITY: Use proper copy of DATA command in error message.
1057 Could leak key material. Remotely exploitable. CVE-2016-9963.
1063 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1064 and 3.4.4 - once the server is enabled to respond to an OCSP request
1065 it does even when not requested, resulting in a stapling non-aware
1066 client dropping the TLS connection.
1068 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1069 support variable-length bit vectors. No functional change.
1071 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1072 The I= interface field on outgoing lines is now after the H= remote
1073 host field, same as incoming lines. There is a separate
1074 outgoing_interface log selector which allows you to disable the
1077 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1078 If not running log_selector +smtp_connection the mainlog would be held
1079 open indefinitely after a "too many connections" event, including to a
1080 deleted file after a log rotate. Leave the per net connection logging
1081 leaving it open for efficiency as that will be quickly detected by the
1082 check on the next write.
1084 HS/01 Bug 1671: Fix post transport crash.
1085 Processing the wait-<transport> messages could crash the delivery
1086 process if the message IDs didn't exist for some reason. When
1087 using 'split_spool_directory=yes' the construction of the spool
1088 file name failed already, exposing the same netto behaviour.
1090 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1091 mime_regex ACL conditions.
1093 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1094 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1095 to HELO, local diagnostic string.
1097 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1098 log line to debug. Even when configured with a tls authenticator many
1099 client connections are expected to not authenticate in this way, so
1100 an authenticate fail is not an error.
1102 HS/02 Add the Exim version string to the process info. This way exiwhat
1103 gives some more detail about the running daemon.
1105 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1106 matter for fast-change records such as DNSBLs.
1108 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1109 retry record, even if constant. There may be multiple transports with
1110 different interface settings and the retry behaviour needs to be kept
1113 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1115 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1117 JH/10 Bug 840: fix log_defer_output option of pipe transport
1119 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1120 hosts_randomize. This matters a lot when combined with mua_wrapper.
1122 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1123 ${quote_pgsql:<string>} operator.
1125 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1127 JH/14 Change header file name for freeradius-client. Relevant if compiling
1128 with Radius support; from the Gentoo tree and checked under Fedora.
1130 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1132 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1133 option transport_filter, meaning no filtering.
1135 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1137 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1138 defaults to "*" (all hosts). The variable is now available when not built
1139 with TLS, default unset, mainly to enable keeping the testsuite sane.
1140 If a server certificate is not supplied (via tls_certificate) an error is
1141 logged, and clients will find TLS connections fail on startup. Presumably
1142 they will retry in-clear.
1143 Packagers of Exim are strongly encouraged to create a server certificate
1144 at installation time.
1146 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1147 with the $config_file variable.
1149 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1150 in transport context, after the attempt, and per-recipient. The latter type
1151 is per host attempted. The event data is the error message, and the errno
1152 information encodes the lookup type (A vs. MX) used for the (first) host,
1153 and the trailing two digits of the smtp 4xx response.
1155 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1156 to write to mainlog (or rejectlog, paniclog) in the window between file
1157 creation and permissions/ownership being changed. Particularly affects
1158 installations where exicyclog is run as root, rather than exim user;
1159 result is that the running daemon panics and dies.
1161 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1163 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1164 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1165 "pri" and "weight". Note that the previous implicit priority given by the
1166 list order is no longer honoured.
1168 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1169 for DKIM processing.
1171 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1172 by defining SUPPORT_SOCKS.
1174 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1175 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1176 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1177 variables are renamed to proxy_{local,external}_{address,port}.
1179 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1180 for a build by defining SUPPORT_I18N
1182 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1183 of the query string, and make ${quote_redis:} do that quoting.
1185 JH/29 Move Events support from Experimental to mainline, enabled by default
1186 and removable for a build by defining DISABLE_EVENT.
1188 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1190 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1191 cached by the daemon.
1193 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1194 by defining LOOKUP_REDIS. The libhiredis library is required.
1196 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1197 keys are given for lookup.
1199 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1200 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1201 only supported when built with TLS support. The PolarSSL SHA routines
1202 are still used when the TLS library is too old for convenient support.
1204 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1205 openssl_options), for security. OpenSSL forces this from version 1.1.0
1206 server-side so match that on older versions.
1208 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1209 allocation for $value could be released as the expansion processing
1210 concluded, but leaving the global pointer active for it.
1212 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1213 and to use the domains and local_parts ACL conditions.
1215 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1216 incorrectly not doubled on cutthrough transmission, hence seen as a
1217 body-termination at the receiving system - resulting in truncated mails.
1218 Commonly the sender saw a TCP-level error, and retransmitted the message
1219 via the normal store-and-forward channel. This could result in duplicates
1220 received - but deduplicating mailstores were liable to retain only the
1221 initial truncated version.
1223 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1225 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1227 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1228 we're in there, support oversigning also; bug 1309.
1230 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1232 HS/04 Add support for keep_environment and add_environment options.
1234 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1235 either intentional arithmetic overflow during PRNG, or testing config-
1238 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1239 delivery resulted in actual delivery. Cancel cutthrough before DATA
1242 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1243 rejects a recipient: pass the reject to the originator.
1245 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1246 Many were false-positives and ignorable, but it's worth fixing the
1249 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1250 for the new environment-manipulation done at startup. Move the routines
1251 from being local to tls.c to being global via the os.c file.
1253 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1254 an extract embedded as result-arg for a map, the first arg for extract
1255 is unavailable so we cannot tell if this is a numbered or keyed
1256 extraction. Accept either.
1262 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1265 JH/02 The smtp transport option "multi_domain" is now expanded.
1267 JH/03 The smtp transport now requests PRDR by default, if the server offers
1270 JH/04 Certificate name checking on server certificates, when exim is a client,
1271 is now done by default. The transport option tls_verify_cert_hostnames
1272 can be used to disable this per-host. The build option
1273 EXPERIMENTAL_CERTNAMES is withdrawn.
1275 JH/05 The value of the tls_verify_certificates smtp transport and main options
1276 default to the word "system" to access the system default CA bundle.
1277 For GnuTLS, only version 3.0.20 or later.
1279 JH/06 Verification of the server certificate for a TLS connection is now tried
1280 (but not required) by default. The verification status is now logged by
1281 default, for both outbound TLS and client-certificate supplying inbound
1284 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1287 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1288 Status Notification (bounce) messages are now MIME format per RFC 3464.
1289 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1290 under the control of the dsn_advertise_hosts option, and routers may
1291 have a dsn_lasthop option.
1293 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1294 default, modifiable by a malware= option. The list separator for
1295 the options can now be changed in the usual way. Bug 68.
1297 JH/10 The smtp_receive_timeout main option is now expanded before use.
1299 JH/11 The incoming_interface log option now also enables logging of the
1300 local interface on delivery outgoing connections.
1302 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1303 if the interface and destination host and port all match.
1305 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1308 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1309 Patch from Andrew Lewis.
1311 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1312 now supports optional time-restrictions, weighting, and priority
1313 modifiers per server. Patch originally by <rommer@active.by>.
1315 JH/16 The spamd_address main option now supports a mixed list of local
1316 and remote servers. Remote servers can be IPv6 addresses, and
1317 specify a port-range.
1319 JH/17 Bug 68: The spamd_address main option now supports an optional
1320 timeout value per server.
1322 JH/18 Bug 1581: Router and transport options headers_add/remove can
1323 now have the list separator specified.
1325 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1328 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1331 JH/21 Support for the A6 type of dns record is withdrawn.
1333 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1334 rather than the verbs used.
1336 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1337 from 255 to 1024 chars.
1339 JH/24 Verification callouts now attempt to use TLS by default.
1341 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1342 are generic router options now. The defaults didn't change.
1344 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1345 Original patch from Alexander Shikoff, worked over by JH.
1347 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1348 files if ZCAT_COMMAND is not executable.
1350 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1352 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1354 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1355 Normally benign, it bites when the pair was led to by a CNAME;
1356 modern usage is to not canonicalize the domain to a CNAME target
1357 (and we were inconsistent anyway for A-only vs AAAA+A).
1359 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1361 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1362 when evaluating $sender_host_dnssec.
1364 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1365 $sender_helo_dnssec variable.
1367 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1369 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1371 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1373 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1374 documented as working, but never had. Support all but $spam_report.
1376 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1377 added for tls authenticator.
1379 HS/03 Add perl_taintmode main config option
1385 TL/01 When running the test suite, the README says that variables such as
1386 no_msglog_check are global and can be placed anywhere in a specific
1387 test's script, however it was observed that placement needed to be near
1388 the beginning for it to behave that way. Changed the runtest perl
1389 script to read through the entire script once to detect and set these
1390 variables, reset to the beginning of the script, and then run through
1391 the script parsing/test process like normal.
1393 TL/02 The BSD's have an arc4random API. One of the functions to induce
1394 adding randomness was arc4random_stir(), but it has been removed in
1395 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1396 function when detected.
1398 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1399 cause callback expansion.
1401 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1402 syntax errors in an expansion can be treated as a string instead of
1403 logging or causing an error, due to the internal use of bool_lax
1404 instead of bool when processing it.
1406 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1407 server certificates when making smtp deliveries.
1409 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1411 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1413 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1415 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1416 Merged patch from Sebastian Wiedenroth.
1418 JH/05 Fix results-pipe from transport process. Several recipients, combined
1419 with certificate use, exposed issues where response data items split
1420 over buffer boundaries were not parsed properly. This eventually
1421 resulted in duplicates being sent. This issue only became common enough
1422 to notice due to the introduction of connection certificate information,
1423 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1425 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1426 size buffer was used, resulting in syntax errors when an expansion
1429 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1430 version 3.3.6 or later.
1432 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1433 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1434 both become "event_action", the variables become $event_name, $event_data
1435 and $event_defer_errno. There is a new variable $verify_mode, usable in
1436 routers, transports and related events. The tls:cert event is now also
1437 raised for inbound connections, if the main configuration event_action
1440 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1441 early OCSP support, but no stapling (appears to be less than 1.0.0).
1443 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1444 server certificate names available under the smtp transport option
1445 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1448 JH/10 Time-related extraction expansions from certificates now use the main
1449 option "timezone" setting for output formatting, and are consistent
1450 between OpenSSL and GnuTLS compilations. Bug 1541.
1452 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1453 encoded parameter in the incoming message. Bug 1558.
1455 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1456 include certificate info, eximon was claiming there were spoolfile
1459 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1461 JH/14 Log delivery-related information more consistently, using the sequence
1462 "H=<name> [<ip>]" wherever possible.
1464 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1465 are problematic for Debian distribution, omit them from the release
1468 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1470 JH/16 Fix string representation of time values on 64bit time_t architectures.
1473 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1474 output list separator was used.
1479 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1480 checkers that were complaining about end of non-void function with no
1483 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1484 This was a regression introduced in 4.83 by another bugfix.
1486 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1488 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1489 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1495 TF/01 Correctly close the server side of TLS when forking for delivery.
1497 When a message was received over SMTP with TLS, Exim failed to clear up
1498 the incoming connection properly after forking off the child process to
1499 deliver the message. In some situations the subsequent outgoing
1500 delivery connection happened to have the same fd number as the incoming
1501 connection previously had. Exim would try to use TLS and fail, logging
1502 a "Bad file descriptor" error.
1504 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1505 utilities have not been installed.
1507 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1508 temporary space as the ACL may create new global variables.
1510 TL/01 LDAP support uses per connection or global context settings, depending
1511 upon the detected version of the libraries at build time.
1513 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1514 to extract and use the src ip:port in logging and expansions as if it
1515 were a direct connection from the outside internet. PPv2 support was
1516 updated based on HAProxy spec change in May 2014.
1518 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1520 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1521 Properly escape header and check for NULL return.
1523 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1526 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1528 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1529 characters in header names, implemented as a verify condition.
1530 Contributed by Michael Fischer v. Mollard.
1532 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1533 results permerror and temperror. Previous values are deprecated but
1534 still accepted. In a future release, err_perm and err_temp will be
1535 completely removed, which will be a backward incompatibility if the
1536 ACL tests for either of these two old results. Patch contributed by
1537 user bes-internal on the mailing list.
1539 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1541 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1542 selectors, in both main and reject logs.
1544 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1547 JH/07 Add malware type "sock" for talking to simple daemon.
1549 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1551 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1552 routers/transports under cutthrough routing.
1554 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1555 numbers. Touch up "bool" conditional to keep the same definition.
1557 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1559 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1561 JH/12 Expand items in router/transport headers_add or headers_remove lists
1562 individually rather than the list as a whole. Bug 1452.
1564 Required for reasonable handling of multiple headers_ options when
1565 they may be empty; requires that headers_remove items with embedded
1566 colons must have them doubled (or the list-separator changed).
1568 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1569 view the policy declared in the DMARC record. Currently, $dmarc_status
1570 is a combined value of both the record presence and the result of the
1573 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1575 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1576 dnslookup router and the smtp transport (applying to the forward
1579 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1580 of ldap servers used for a specific lookup. Patch provided by Heiko
1583 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1584 New variable $lookup_dnssec_authenticated for observability.
1586 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1587 Patch submitted by Lars Timman.
1589 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1591 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1592 Requires trusted mode and valid format message id, aborts otherwise.
1593 Patch contributed by Heiko Schlichting.
1595 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1596 certextract with support for various fields. Bug 1358.
1598 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1599 is requested by default, modifiable by smtp transport option
1602 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1603 operate on certificate variables to give certificate fingerprints
1604 Also new ${sha256:cert_variable}.
1606 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1608 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1609 Christian Aistleitner.
1611 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1613 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1614 file. Patch from Wolfgang Breyha.
1616 JH/25 Expand the coverage of the delivery $host and $host_address to
1617 client authenticators run in verify callout. Bug 1476.
1619 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1620 align with daemon_smtp_ports. Bug 72.
1622 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1623 support and error reporting did not work properly.
1625 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1626 and is readable. Patch from Andrew Colin Kissa.
1628 TL/14 Enhance documentation of ${run expansion and how it parses the
1629 commandline after expansion, particularly in the case when an
1630 unquoted variable expansion results in an empty value.
1632 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1634 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1635 by renaming away from it. Addresses GH issue 15, reported by
1638 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1640 TL/15 SECURITY: prevent double expansion in math comparison functions
1641 (can expand unsanitized data). Not remotely exploitable.
1648 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1650 PP/02 Make -n do something, by making it not do something.
1651 When combined with -bP, the name of an option is not output.
1653 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1656 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1657 $sender_host_name and config options to manage this, and basic check
1660 PP/05 DSCP support for outbound connections and control modifier for inbound.
1662 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1663 (Only plugin which currently uses this is kerberos4, which nobody should
1664 be using, but we should make it available and other future plugins might
1665 conceivably use it, even though it would break NAT; stuff *should* be
1666 using channel bindings instead).
1668 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1669 name; added for Sendmail compatibility; requires admin caller.
1670 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1671 just ignore it); requires trusted caller.
1672 Also parse but ignore: -Ac -Am -X<logfile>
1675 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1677 TL/02 Add +smtp_confirmation as a default logging option.
1679 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1680 Patch by Magnus Holmgren from 2007-02-20.
1682 TL/04 Bugzilla 1281 - Spec typo.
1683 Bugzilla 1283 - Spec typo.
1684 Bugzilla 1290 - Spec grammar fixes.
1686 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1688 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1690 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1691 mailing list by by Dmitry Isaikin.
1693 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1695 JH/02 Support "G" suffix to numbers in ${if comparisons.
1697 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1699 NM/01 Bugzilla 1197 - Spec typo
1700 Bugzilla 1196 - Spec examples corrections
1702 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1704 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1705 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1708 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1709 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1711 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1712 "acl {{name}{arg}...}", and optional args on acl condition
1715 JH/05 Permit multiple router/transport headers_add/remove lines.
1717 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1719 JH/07 Avoid using a waiting database for a single-message-only transport.
1720 Performance patch from Paul Fisher. Bugzilla 1262.
1722 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1725 JH/09 Add $headers_added variable, with content from use of ACL modifier
1726 add_header (but not yet added to the message). Bugzilla 199.
1728 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1729 Pulled from Bugzilla 817 by Wolfgang Breyha.
1731 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1733 (nb: this is the same fix as in Exim 4.80.1)
1735 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1738 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1741 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1743 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1744 advertise SMTP AUTH mechanism to us, instead of a generic
1745 protocol violation error. Also, make Exim more robust to bad
1746 data from the Dovecot auth socket.
1748 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1750 When a queue runner is handling a message, Exim first routes the
1751 recipient addresses, during which it prunes them based on the retry
1752 hints database. After that it attempts to deliver the message to
1753 any remaining recipients. It then updates the hints database using
1756 So if a recipient address works intermittently, it can get repeatedly
1757 deferred at routing time. The retry hints record remains fresh so the
1758 address never reaches the final cutoff time.
1760 This is a fairly common occurrence when a user is bumping up against
1761 their storage quota. Exim had some logic in its local delivery code
1762 to deal with this. However it did not apply to per-recipient defers
1763 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1765 This change adds a proper retry rule check during routing so that the
1766 final cutoff time is checked against the message's age. We only do
1767 this check if there is an address retry record and there is not a
1768 domain retry record; this implies that previous attempts to handle
1769 the address had the retry_use_local_parts option turned on. We use
1770 this as an approximation for the destination being like a local
1771 delivery, as in LMTP.
1773 I suspect this new check makes the old local delivery cutoff check
1774 redundant, but I have not verified this so I left the code in place.
1776 TF/02 Correct gecos expansion when From: is a prefix of the username.
1778 Test 0254 submits a message to Exim with the header
1782 When I ran the test suite under the user fanf2, Exim expanded
1783 the header to contain my full name, whereas it should have added
1784 a Resent-Sender: header. It erroneously treats any prefix of the
1785 username as equal to the username.
1787 This change corrects that bug.
1789 GF/01 DCC debug and logging tidyup
1790 Error conditions log to paniclog rather than rejectlog.
1791 Debug lines prefixed by "DCC: " to remove any ambiguity.
1793 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1795 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1796 Bug spotted by Jeremy Harris; was flawed since initial commit.
1797 Would have resulted in OCSP responses post-SNI triggering an Exim
1798 NULL dereference and crash.
1800 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1802 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1803 Bug detection, analysis and fix by Samuel Thibault.
1804 Bugzilla 1331, Debian bug #698092.
1806 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1808 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1809 Server implementation by Todd Lyons, client by JH.
1810 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1811 config variable "prdr_enable" controls whether the server
1812 advertises the facility. If the client requests PRDR a new
1813 acl_data_smtp_prdr ACL is called once for each recipient, after
1814 the body content is received and before the acl_smtp_data ACL.
1815 The client is controlled by both of: a hosts_try_prdr option
1816 on the smtp transport, and the server advertisement.
1817 Default client logging of deliveries and rejections involving
1818 PRDR are flagged with the string "PRDR".
1820 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1821 fclose(). Diagnosis by Todd Lyons.
1823 PP/17 Update configure.default to handle IPv6 localhost better.
1824 Patch by Alain Williams (plus minor tweaks).
1827 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1828 This is now consistent with GnuTLS, and is now documented: the
1829 previous undocumented portable approach to treating the option as
1830 unset was to force an expansion failure. That still works, and
1831 an empty string is now equivalent.
1833 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1834 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1835 not performing validation itself.
1837 PP/20 Added force_command boolean option to pipe transport.
1838 Patch from Nick Koston, of cPanel Inc.
1840 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1843 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1845 PP/21 Fix eximon continuous updating with timestamped log-files.
1846 Broken in a format-string cleanup in 4.80, missed when I repaired the
1847 other false fix of the same issue.
1848 Report and fix from Heiko Schlichting.
1851 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1852 Report from Prashanth Katuri.
1854 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1855 It's SecureTransport, so affects any MacOS clients which use the
1856 system-integrated TLS libraries, including email clients.
1858 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1859 using a MIME ACL for non-SMTP local injection.
1860 Report and assistance in diagnosis by Warren Baker.
1862 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1864 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1866 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1867 last id that failed so it may be referenced in subsequent ACL's.
1869 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1872 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1873 ldap library initialization, allowing self-signed CA's to be
1874 used. Also properly sets require_cert option later in code by
1875 using NULL (global ldap config) instead of ldap handle (per
1876 session). Bug diagnosis and testing by alxgomz.
1878 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1879 the src/util/ subdirectory.
1881 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1882 renamed to Transport Post Delivery Action by Jeremy Harris, as
1885 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1886 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1887 redis_servers = needs to be configured which will be used by the redis
1888 lookup. Patch from Warren Baker, of The Packet Hub.
1890 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1892 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1893 hostname or reverse DNS when processing a host list. Used suggestions
1894 from multiple comments on this bug.
1896 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1898 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1899 Missed a few lines, added it to make the runtest require no keyboard
1902 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1903 contains upper case chars. Make router use caseful_local_part.
1905 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1906 support when GnuTLS has been built with p11-kit.
1912 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1914 This, or similar/improved, will also be change PP/11 of 4.82.
1920 PP/01 Handle short writes when writing local log-files.
1921 In practice, only affects FreeBSD (8 onwards).
1922 Bugzilla 1053, with thanks to Dmitry Isaikin.
1924 NM/01 Bugzilla 949 - Documentation tweak
1926 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1929 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1931 PP/02 Implemented gsasl authenticator.
1933 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1935 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1936 `pkg-config foo` for cflags/libs.
1938 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1939 with rest of GSASL and with heimdal_gssapi.
1941 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1942 `pkg-config foo` for cflags/libs for the TLS implementation.
1944 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1945 properties get this fed in as external SSF. A number of robustness
1946 and debugging improvements to the cyrus_sasl authenticator.
1948 PP/08 cyrus_sasl server now expands the server_realm option.
1950 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1951 Patch by Jeremy Harris.
1953 PP/10 Added dbmjz lookup type.
1955 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1957 PP/12 MAIL args handles TAB as well as SP, for better interop with
1958 non-compliant senders.
1959 Analysis and variant patch by Todd Lyons.
1961 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1962 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1963 Patch from Dirk Mueller <dmueller@suse.com>
1965 PP/13 tls_peerdn now print-escaped for spool files.
1966 Observed some $tls_peerdn in wild which contained \n, which resulted
1967 in spool file corruption.
1969 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1970 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1971 or write after TLS renegotiation, which otherwise led to messages
1974 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1975 as a tracking header (ie: a signed header comes before the signature).
1976 Patch from Wolfgang Breyha.
1978 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1979 comma-sep list; embedded commas doubled.
1981 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1983 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1985 Report and patch from Dmitry Banschikov.
1987 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1988 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1989 failures. We appear to now support TLS1.1+ with Exim.
1991 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1992 lets Exim select keys and certificates based upon TLS SNI from client.
1993 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1994 before an outbound SMTP session. New log_selector, +tls_sni.
1996 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1997 NULL dereference. Report and patch from Alun Jones.
1999 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2000 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2001 Not seeing resolver debug output on NetBSD, but suspect this is a
2002 resolver implementation change.
2004 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2005 Left warnings. Added "eximon gdb" invocation mode.
2007 PP/21 Defaulting "accept_8bitmime" to true, not false.
2009 PP/22 Added -bw for inetd wait mode support.
2011 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2012 locate the relevant includes and libraries. Made this the default.
2014 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2015 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2017 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2018 This may cause build issues on older platforms.
2020 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2021 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2022 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2023 Added SNI support via GnuTLS too.
2024 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2026 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2028 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2029 Applied second patch from Janne, implementing suggestion to default
2030 multiple-strings-in-record handling to match SPF spec.
2032 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2034 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2035 read-only, out of scope).
2036 Patch from Wolfgang Breyha, report from Stuart Northfield.
2038 PP/29 Fix three issues highlighted by clang analyser static analysis.
2039 Only crash-plausible issue would require the Cambridge-specific
2040 iplookup router and a misconfiguration.
2041 Report from Marcin Mirosław.
2043 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2045 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2046 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2047 As part of this, removing so much warning spew let me fix some minor
2048 real issues in debug logging.
2050 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2051 assignment on my part. Fixed.
2053 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2054 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2055 Janne Snabb (who went above and beyond: thank you).
2057 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2058 string otherwise requires a connection and a bunch more work and it's
2059 relatively easy to get wrong. Should also expose TLS library linkage
2062 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2063 64-bit ${eval} (JH/03).
2065 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2066 GNU libc to support some of the 64-bit stuff, should not lead to
2067 conflicts. Defined before os.h is pulled in, so if a given platform
2068 needs to override this, it can.
2070 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2071 protection layer was required, which is not implemented.
2072 Bugzilla 1254, patch from Wolfgang Breyha.
2074 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2075 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2076 tls_dhparam take prime identifiers. Also unbreak combination of
2077 OpenSSL+DH_params+TLSSNI.
2079 PP/39 Disable SSLv2 by default in OpenSSL support.
2085 PP/01 Solaris build fix for Oracle's LDAP libraries.
2086 Bugzilla 1109, patch from Stephen Usher.
2088 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2090 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2093 TF/02 Fix a couple more cases where we did not log the error message
2094 when unlink() failed. See also change 4.74-TF/03.
2096 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2097 lock up or crash if it happened to be inside a call to libc when it
2098 got a SIGUSR1 from exiwhat.
2100 The SIGUSR1 handler appends the current process status to the process
2101 log which is later printed by exiwhat. It used to use the general
2102 purpose logging code to do this, but several functions it calls are
2103 not safe for signals.
2105 The new output code in the SIGUSR1 handler is specific to the process
2106 log, and simple enough that it's easy to inspect for signal safety.
2107 Removing some special cases also simplifies the general logging code.
2108 Removing the spurious timestamps from the process log simplifies
2111 TF/04 Improved ratelimit ACL condition.
2113 The /noupdate option has been deprecated in favour of /readonly which
2114 has clearer semantics. The /leaky, /strict, and /readonly update modes
2115 are mutually exclusive. The update mode is no longer included in the
2116 database key; it just determines when the database is updated. (This
2117 means that when you upgrade Exim will forget old rate measurements.)
2119 Exim now checks that the per_* options are used with an update mode that
2120 makes sense for the current ACL. For example, when Exim is processing a
2121 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2122 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2123 must specify per_mail/readonly. If you omit the update mode it defaults to
2124 /leaky where that makes sense (as before) or /readonly where required.
2126 The /noupdate option is now undocumented but still supported for
2127 backwards compatibility. It is equivalent to /readonly except that in
2128 ACLs where /readonly is required you may specify /leaky/noupdate or
2129 /strict/noupdate which are treated the same as /readonly.
2131 A useful new feature is the /count= option. This is a generalization
2132 of the per_byte option, so that you can measure the throughput of other
2133 aggregate values. For example, the per_byte option is now equivalent
2134 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2136 The per_rcpt option has been generalized using the /count= mechanism
2137 (though it's more complicated than the per_byte equivalence). When it is
2138 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2139 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2140 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2141 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2142 Note that using per_rcpt with a non-readonly update mode in more than
2143 one ACL will cause the recipients to be double-counted. (The per_mail
2144 and per_byte options don't have this problem.)
2146 The handling of very low rates has changed slightly. If the computed rate
2147 is less than the event's count (usually one) then this event is the first
2148 after a long gap. In this case the rate is set to the same as this event's
2149 count, so that the first message of a spam run is counted properly.
2151 The major new feature is a mechanism for counting the rate of unique
2152 events. The new per_addr option counts the number of different
2153 recipients that someone has sent messages to in the last time period. It
2154 behaves like per_rcpt if all the recipient addresses are different, but
2155 duplicate recipient addresses do not increase the measured rate. Like
2156 the /count= option this is a general mechanism, so the per_addr option
2157 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2158 example, measure the rate that a client uses different sender addresses
2159 with the options per_mail/unique=$sender_address. There are further
2160 details in the main documentation.
2162 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2164 TF/06 Removed a few PCRE remnants.
2166 TF/07 Automatically extract Exim's version number from tags in the git
2167 repository when doing development or release builds.
2169 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2170 Bugzilla 879. Patch from Paul Fisher.
2172 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2173 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2176 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2178 PP/05 Variable $av_failed, true if the AV scanner deferred.
2179 Bugzilla 1078. Patch from John Horne.
2181 PP/06 Stop make process more reliably on build failure.
2182 Bugzilla 1087. Patch from Heiko Schlittermann.
2184 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2185 Bugzilla 1089. Patch from Heiko Schlittermann.
2187 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2188 Bugzilla 1131. Patch from Holger Weiß.
2190 PP/09 Handle IPv6 addresses with SPF.
2191 Bugzilla 860. Patch from Wolfgang Breyha.
2193 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2195 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2198 PP/11 match_* no longer expand right-hand-side by default.
2199 New compile-time build option, EXPAND_LISTMATCH_RHS.
2200 New expansion conditions, "inlist", "inlisti".
2202 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2204 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2206 PP/14 fix log_write() format string regression from TF/03.
2207 Bugzilla 1152. Patch from Dmitry Isaikin.
2213 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2215 PP/02 Harmonised TLS library version reporting; only show if debugging.
2216 Layout now matches that introduced for other libraries in 4.74 PP/03.
2218 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2220 PP/04 New "dns_use_edns0" global option.
2222 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2225 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2226 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2228 TK/01 Updated PolarSSL code to 0.14.2.
2229 Bugzilla 1097. Patch from Andreas Metzler.
2231 PP/07 Catch divide-by-zero in ${eval:...}.
2232 Fixes bugzilla 1102.
2234 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2237 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2238 format-string attack -- SECURITY: remote arbitrary code execution.
2240 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2241 time unintentionally subject to list matching rules, letting the header
2242 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2243 arbitrary string expansion). This allowed for information disclosure.
2245 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2246 INT_MIN/-1 -- value coerced to INT_MAX.
2252 NM/01 Workaround for PCRE version dependency in version reporting
2255 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2256 This fixes portability to compilers other than gcc, notably
2257 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2259 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2260 makefiles for portability to HP-UX and POSIX correctness.
2262 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2263 Also via indented variable definition in the Makefile.
2264 (Debugging by Oliver Heesakkers).
2266 PP/02 Restore caching of spamd results with expanded spamd_address.
2267 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2269 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2270 Improves build reliability. Fix from: Frank Elsner
2272 NM/02 Fix wide character breakage in the rfc2047 coding
2273 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2275 NM/03 Allow underscore in dnslist lookups
2276 Fixes bug 1026. Patch from Graeme Fowler
2278 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2279 Code patches from Adam Ciarcinski of NetBSD.
2281 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2284 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2285 is logged, to avoid truncation. Patch from John Horne.
2287 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2288 Patch from Jakob Hirsch.
2290 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2291 SQL string expansion failure details.
2292 Patch from Andrey Oktyabrski.
2294 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2295 Patch from Simon Arlott.
2297 PP/09 New lookups functionality failed to compile on old gcc which rejects
2298 extern declarations in function scope.
2299 Patch from Oliver Fleischmann
2301 PP/10 Use sig_atomic_t for flags set from signal handlers.
2302 Check getgroups() return and improve debugging.
2303 Fixed developed for diagnosis in bug 927 (which turned out to be
2306 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2307 Patch from Mark Zealey.
2309 PP/12 Bugzilla 1056: Improved spamd server selection.
2310 Patch from Mark Zealey.
2312 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2313 Based on patch from Heiko Schlittermann.
2315 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2316 Patch from Uwe Doering, sign-off by Michael Haardt.
2318 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2319 variable declaration deep within a block. Bug and patch from
2322 PP/15 lookups-Makefile IRIX compatibility coercion.
2324 PP/16 Make DISABLE_DKIM build knob functional.
2326 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2327 Patch by Simon Arlott
2329 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2330 variable argument macros. Our copy now differs from upstream.
2336 TF/01 Failure to get a lock on a hints database can have serious
2337 consequences so log it to the panic log.
2339 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2340 controlled using the smtp_confirmation log selector.
2342 TF/03 Include the error message when we fail to unlink a spool file.
2344 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2345 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2346 for maintaining out-of-tree patches for some time.
2348 PP/01 Bugzilla 139: Documentation and portability issues.
2349 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2350 Handle per-OS dynamic-module compilation flags.
2352 PP/02 Let /dev/null have normal permissions.
2353 The 4.73 fixes were a little too stringent and complained about the
2354 permissions on /dev/null. Exempt it from some checks.
2355 Reported by Andreas M. Kirchwitz.
2357 PP/03 Report version information for many libraries, including
2358 Exim version information for dynamically loaded libraries. Created
2359 version.h, now support a version extension string for distributors
2360 who patch heavily. Dynamic module ABI change.
2362 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2363 privilege escalation vulnerability whereby the Exim run-time user
2364 can cause root to append content of the attacker's choosing to
2367 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2370 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2371 If dropping privileges for untrusted macros, we disabled normal logging
2372 on the basis that it would fail; for the Exim run-time user, this is not
2373 the case, and it resulted in successful deliveries going unlogged.
2374 Fixed. Reported by Andreas Metzler.
2380 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2381 only prepend for the Resent-* case. Fixes regression introduced in
2382 Exim 4.70 by NM/22 for Bugzilla 607.
2384 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2385 increasing numbers of administrators be bitten by this.
2387 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2389 PP/03 Bugzilla 994: added openssl_options main configuration option.
2391 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2393 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2395 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2397 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2398 without a peer certificate, leading to a segfault because of an
2399 assumption that peers always have certificates. Be a little more
2400 paranoid. Problem reported by Martin Tscholak.
2402 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2403 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2404 NB: ClamAV planning to remove STREAM in "middle of 2010".
2405 CL also introduces -bmalware, various -d+acl logging additions and
2406 more caution in buffer sizes.
2408 PP/09 Implemented reverse_ip expansion operator.
2410 PP/10 Bugzilla 937: provide a "debug" ACL control.
2412 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2414 PP/12 Bugzilla 973: Implement --version.
2416 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2418 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2420 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2422 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2423 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2424 ignore trailing whitespace.
2426 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2428 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2431 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2432 Notification from Dr Andrew Aitchison.
2434 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2435 ExtendedDetectionInfo response format.
2436 Notification from John Horne.
2438 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2441 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2442 XSL and documented dependency on system catalogs, with examples of how
2445 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2448 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2449 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2450 configuration file which is writeable by the Exim user or group.
2452 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2453 of configuration files to cover files specified with the -C option if
2454 they are going to be used with root privileges, not just the default
2457 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2458 option (effectively making it always true).
2460 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2461 files to be used while preserving root privileges.
2463 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2464 that rogue child processes cannot use them.
2466 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2467 run-time user, instead of root.
2469 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2470 Exim run-time user without dropping privileges.
2472 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2473 result string, instead of calling string_vformat() twice with the same
2476 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2477 for other users. Others should always drop root privileges if they use
2478 -C on the command line, even for a whitelisted configure file.
2480 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2482 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2488 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2489 $data_path, and $header_path variables; fixed documentation bugs and
2492 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2493 exipick to access non-standard spools, including the "frozen" queue
2496 NM/01 Bugzilla 965: Support mysql stored procedures.
2497 Patch from Alain Williams
2499 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2501 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2502 Patch from Andreas Metzler
2504 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2505 Patch from Kirill Miazine
2507 NM/05 Bugzilla 671: Added umask to procmail example.
2509 JJ/03 installed exipick 20100323.0, fixing doc bug
2511 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2512 directory. Notification and patch from Dan Rosenberg.
2514 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2516 TK/02 Improve log output when DKIM signing operation fails.
2518 MH/01 Treat the transport option dkim_domain as a colon separated
2519 list, not as a single string, and sign the message with each element,
2520 omitting multiple occurences of the same signer.
2522 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2523 Bugzilla 985, 986. Patch by Simon Arlott
2525 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2526 Patch by Simon Arlott
2528 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2529 MBX locking. Notification from Dan Rosenberg.
2535 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2537 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2539 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2541 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2543 NM/04 Bugzilla 915: Flag broken perl installation during build.
2549 TK/01 Added patch by Johannes Berg that expands the main option
2550 "spamd_address" if it starts with a dollar sign.
2552 TK/02 Write list of recipients to X-Envelope-Sender header when building
2553 the mbox-format spool file for content scanning (suggested by Jakob
2556 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2557 (http://www.dcc-servers.net/) support via dccifd. Activated by
2558 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2560 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2561 by Mark Daniel Reidel <mr@df.eu>.
2563 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2564 When building exim an external PCRE library is now needed -
2565 PCRE is a system library on the majority of modern systems.
2566 See entry on PCRE_LIBS in EDITME file.
2568 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2569 conversation. Added nologin parameter to request.
2570 Patch contributed by Kirill Miazine.
2572 TF/01 Do not log submission mode rewrites if they do not change the address.
2574 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2576 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2577 log files in place. Contributed by Roberto Lima.
2579 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2581 TF/03 Bugzilla 615: When checking the local_parts router precondition
2582 after a local_part_suffix or local_part_prefix option, Exim now
2583 does not use the address's named list lookup cache, since this
2584 contains cached lookups for the whole local part.
2586 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2587 Robert Millan. Documentation is in experimental-spec.txt.
2589 TF/04 Bugzilla 668: Fix parallel build (make -j).
2591 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2593 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2594 Patch provided by Jan Srzednicki.
2596 TF/05 Leading white space used to be stripped from $spam_report which
2597 wrecked the formatting. Now it is preserved.
2599 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2600 that they are available at delivery time.
2602 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2604 TF/08 TLS error reporting now respects the incoming_interface and
2605 incoming_port log selectors.
2607 TF/09 Produce a more useful error message if an SMTP transport's hosts
2608 setting expands to an empty string.
2610 NM/06 Bugzilla 744: EXPN did not work under TLS.
2611 Patch provided by Phil Pennock.
2613 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2614 Patch provided by Richard Godbee.
2616 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2617 acl_smtp_notquit, added index entry.
2619 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2620 Patch provided by Eugene Bujak.
2622 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2623 accept(). Patch provided by Maxim Dounin.
2625 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2626 Patch provided by Phil Pennock.
2628 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2630 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2631 Patch provided by Brad "anomie" Jorsch.
2633 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2634 Patch provided by Dean Brooks.
2636 TK/05 Add native DKIM support (does not depend on external libraries).
2638 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2639 Patch provided by Graeme Fowler.
2641 NM/16 Bugzilla 851: Documentation example syntax fix.
2643 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2645 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2648 NM/19 Bugzilla 745: TLS version reporting.
2649 Patch provided by Phil Pennock.
2651 NM/20 Bugzilla 167: bool: condition support.
2652 Patch provided by Phil Pennock.
2654 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2655 clients. Patch provided by Phil Pennock.
2657 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2658 Patch provided by Brad "anomie" Jorsch.
2660 NM/23 Bugzilla 687: Fix misparses in eximstats.
2661 Patch provided by Heiko Schlittermann.
2663 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2664 Patch provided by Heiko Schlittermann.
2666 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2667 plus update to original patch.
2669 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2671 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2672 Patch provided by David Brownlee.
2674 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2676 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2678 NM/30 Bugzilla 888: TLS documentation bugfixes.
2680 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2682 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2683 Unlike the original bugzilla I have changed all shell scripts in src tree.
2685 NM/33 Bugzilla 898: Transport filter timeout fix.
2686 Patch by Todd Rinaldo.
2688 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2689 Patch by Serge Demonchaux.
2691 NM/35 Bugzilla 39: Base64 decode bug fixes.
2692 Patch by Jakob Hirsch.
2694 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2696 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2698 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2700 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2706 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2707 ALT-N's libdkim that I have put here:
2708 http://duncanthrax.net/exim-experimental/
2710 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2711 were called 'true' and it seems that C99 defines that as a reserved
2712 keyword to be used with 'bool' variable types. That means you could
2713 not include C99-style headers which use bools without triggering
2714 build errors in sieve.c.
2716 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2717 as mailq or other aliases. Changed the --help handling significantly
2718 to do whats expected. exim_usage() emits usage/help information.
2720 SC/01 Added the -bylocaldomain option to eximstats.
2722 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2724 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2726 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2732 PH/01 Another patch from the Sieve maintainer.
2734 PH/02 When an IPv6 address is converted to a string for single-key lookup
2735 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2736 dots are used instead of colons so that keys in lsearch files need not
2737 contain colons. This was done some time before quoting was made available
2738 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2739 (notated using the quote facility) so as to distinguish them from IPv4
2740 keys. This meant that lookups for IP addresses in host lists did not work
2741 for iplsearch lookups.
2743 This has been fixed by arranging for IPv6 addresses to be expressed with
2744 colons if the lookup type is iplsearch. This is not incompatible, because
2745 previously such lookups could never work.
2747 The situation is now rather anomalous, since one *can* have colons in
2748 ordinary lsearch keys. However, making the change in all cases is
2749 incompatible and would probably break a number of configurations.
2751 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2754 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2755 conversion specification without a maximum field width, thereby enabling
2756 a rogue spamd server to cause a buffer overflow. While nobody in their
2757 right mind would setup Exim to query an untrusted spamd server, an
2758 attacker that gains access to a server running spamd could potentially
2759 exploit this vulnerability to run arbitrary code as the Exim user.
2761 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2762 $primary_hostname instead of what libspf2 thinks the hosts name is.
2764 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2765 a directory entry by the name of the lookup key. Previously, if a
2766 symlink pointed to a non-existing file or a file in a directory that
2767 Exim lacked permissions to read, a lookup for a key matching that
2768 symlink would fail. Now it is enough that a matching directory entry
2769 exists, symlink or not. (Bugzilla 503.)
2771 PH/03 The body_linecount and body_zerocount variables are now exported in the
2774 PH/04 Added the $dnslist_matched variable.
2776 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2777 This means they are set thereafter only if the connection becomes
2780 PH/06 Added the client_condition to authenticators so that some can be skipped
2781 by clients under certain conditions.
2783 PH/07 The error message for a badly-placed control=no_multiline_responses left
2784 "_responses" off the end of the name.
2786 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2788 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2789 (without spaces) instead of just copying the configuration text.
2791 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2793 PH/11 Added $max_received_linelength.
2795 PH/12 Added +ignore_defer and +include_defer to host lists.
2797 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2798 way in which PCRE > 7.0 is built.
2800 PH/14 Implemented queue_only_load_latch.
2802 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2803 MAIL command. The effect was to mangle the value on 64-bit systems.
2805 PH/16 Another patch from the Sieve maintainer.
2807 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2809 PH/18 If a system quota error occurred while trying to create the file for
2810 a maildir delivery, the message "Mailbox is full" was not appended to the
2811 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2812 only to a quota excession during the actual writing of the file.
2814 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2815 characters?) which causes problems in log lines. The DN values are now
2816 passed through string_printing() before being added to log lines.
2818 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2819 and InterBase are left for another time.)
2821 PH/21 Added message_body_newlines option.
2823 PH/22 Guard against possible overflow in moan_check_errorcopy().
2825 PH/23 POSIX allows open() to be a macro; guard against that.
2827 PH/24 If the recipient of an error message contained an @ in the local part
2828 (suitably quoted, of course), incorrect values were put in $domain and
2829 $local_part during the evaluation of errors_copy.
2835 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2836 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2839 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2840 issue a MAIL command.
2842 PH/02 In an ACL statement such as
2844 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2846 if a client was not listed at all, or was listed with a value other than
2847 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2848 the condition was not true (as it should be), so access was not denied.
2849 The bug was that the ! inversion was incorrectly passed on to the second
2850 item. This has been fixed.
2852 PH/03 Added additional dnslists conditions == and =& which are different from
2853 = and & when the dns lookup returns more than one IP address.
2855 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2856 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2858 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2859 FSYNC, which compiles an option called disable_fsync that allows for
2860 bypassing fsync(). The documentation is heavily laced with warnings.
2862 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2864 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2865 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2866 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2867 including adding "make clean"; (3) Added -fPIC when compiling the test
2868 dynamically loaded module, to get rid of a warning.
2870 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2871 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2872 = 0s. The bug is otherwise harmless.
2874 PH/07 There was a bug in the dovecot authenticator such that the value of
2875 $auth1 could be overwritten, and so not correctly preserved, after a
2876 successful authentication. This usually meant that the value preserved by
2877 the server_setid option was incorrect.
2879 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2881 PH/09 Installed PCRE release 7.0.
2883 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2884 run for batched SMTP input. It is now run at the start of every message
2885 in the batch. While fixing this I discovered that the process information
2886 (output by running exiwhat) was not always getting set for -bs and -bS
2887 input. This is fixed, and it now also says "batched" for BSMTP.
2889 PH/11 Added control=no_pipelining.
2891 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2892 patch, slightly modified), and move the expansion of helo_data till after
2893 the connection is made in the smtp transport (so it can use these
2896 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2898 PH/14 Added log_selector = +pid.
2900 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2902 PH/16 Add ${if forany and ${if forall.
2904 PH/17 Added dsn_from option to vary the From: line in DSNs.
2906 PH/18 Flush SMTP output before performing a callout, unless control =
2907 no_callout_flush is set.
2909 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2910 was true (the default) a successful delivery failed to delete the retry
2911 item, thus causing premature timeout of the address. The bug is now
2914 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2916 PH/21 Long custom messages for fakedefer and fakereject are now split up
2917 into multiline responses in the same way that messages for "deny" and
2918 other ACL rejections are.
2920 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2921 with slight modification.
2923 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2924 draft, changing the syntax and factoring some duplicate code".
2926 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2927 for deliveries of the second and subsequent messages over the same SMTP
2930 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2931 ${reduce, with only minor "tidies".
2933 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2935 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2936 expansion side effects.
2938 PH/27 When a message times out after an over-quota error from an Exim-imposed
2939 quota, the bounce message says "mailbox is full". This message was not
2940 being given when it was a system quota that was exceeded. It now should
2943 MH/03 Made $recipients available in local_scan(). local_scan() already has
2944 better access to the recipient list through recipients_list[], but
2945 $recipients can be useful in postmaster-provided expansion strings.
2947 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2948 in the case of a MAIL command with additional options following the
2949 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2950 were accidentally chopped off.
2952 PH/29 SMTP synchronization checks are implemented when a command is read -
2953 there is a check that no more input is waiting when there shouldn't be
2954 any. However, for some commands, a delay in an ACL can mean that it is
2955 some time before the response is written. In this time, more input might
2956 arrive, invalidly. So now there are extra checks after an ACL has run for
2957 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2958 pipelining has not been advertised.
2960 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2962 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2963 returned in the SMTP response when smtp_return_error_details was false.
2964 This has been fixed.
2966 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2967 instead of the C I/O that was originally supplied, because problems were
2968 reported on Solaris.
2970 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2971 Exim which did not show up earlier: it was assuming that a call to
2972 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2973 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2974 was a macro that became an assignment, so it seemed to work. This has
2975 changed to a proper function call with a void return, hence the compile
2976 error. Exim's code has been fixed.
2978 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2981 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2983 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2985 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2986 because it turns out to be too big or there is a timeout) there is no
2987 "Completed" line in the log. When some messages of this type were
2988 selected by exigrep, they were listed as "not completed". Others were
2989 picked up by some special patterns. I have improved the selection
2990 criteria to be more general.
2992 PH/38 The host_find_failed option in the manualroute router can now be set
2993 to "ignore", to completely ignore a host whose IP address cannot be
2994 found. If all hosts are ignored, the behaviour is controlled by the new
2995 host_all_ignored option.
2997 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2998 homing or because of multiple MX records with /mx) generated more than
2999 one IP address, and the following item turned out to be the local host,
3000 all the secondary addresses of the first item were incorrectly removed
3001 from the list, along with the local host and any following hosts (which
3002 is what is supposed to happen).
3004 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3005 whoever called Exim into the -H file. In the case of the daemon it was
3006 behaving confusingly. When first started, it used values for whoever
3007 started the daemon, but after a SIGHUP it used the Exim user (because it
3008 calls itself on a restart). I have changed the code so that it now always
3011 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3012 message are rejected with the same error (e.g. no authentication or bad
3013 sender address), and a DATA command is nevertheless sent (as can happen
3014 with PIPELINING or a stupid MUA), the error message that was given to the
3015 RCPT commands is included in the rejection of the DATA command. This is
3016 intended to be helpful for MUAs that show only the final error to their
3019 PH/42 Another patch from the Sieve maintainer.
3021 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3022 Eximstats - Fixed some broken HTML links and added missing column headers
3024 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3025 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3027 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3029 PH/43 Yet another patch from the Sieve maintainer.
3031 PH/44 I found a way to check for a TCP/IP connection going away before sending
3032 the response to the final '.' that terminates a message, but only in the
3033 case where the client has not sent further data following the '.'
3034 (unfortunately, this is allowed). However, in many cases there won't be
3035 any further data because there won't be any more messages to send. A call
3036 to select() can be used: if it shows that the input is "ready", there is
3037 either input waiting, or the socket has been closed. An attempt to read
3038 the next input character can distinguish the two cases. Previously, Exim
3039 would have sent an OK response which the client would never have see.
3040 This could lead to message repetition. This fix should cure that, at
3041 least in a lot of common cases.
3043 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3044 advertised in response to EHLO.
3050 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3051 fixed by 4.65/MH/01 (is this a record?) are fixed:
3053 (i) An empty string was always treated as zero by the numeric comparison
3054 operators. This behaviour has been restored.
3056 (ii) It is documented that the numeric comparison operators always treat
3057 their arguments as decimal numbers. This was broken in that numbers
3058 starting with 0 were being interpreted as octal.
3060 While fixing these problems I realized that there was another issue that
3061 hadn't been noticed. Values of message_size_limit (both the global option
3062 and the transport option) were treated as octal if they started with 0.
3063 The documentation was vague. These values are now always treated as
3064 decimal, and I will make that clear in the documentation.
3070 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3071 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3074 MH/01 Don't check that the operands of numeric comparison operators are
3075 integers when their expansion is in "skipping" mode (fixes bug
3076 introduced by 4.64-PH/07).
3078 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3079 child addresses, Exim now panics and dies. Previously, because the count
3080 is held in a short int, deliveries were likely to be lost. As such a
3081 large number of recipients for a single message is ridiculous
3082 (performance will be very, very poor), I have chosen to impose a limit
3083 rather than extend the field.
3089 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3090 leftover -K file (the existence of which was triggered by #402).
3091 While we were at it, introduced process PID as part of the -K
3092 filename. This should rule out race conditions when creating
3095 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3096 processing considerably. Previous code took too long for large mails,
3097 triggering a timeout which in turn triggers #401.
3099 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3100 in the DK code in transports.c. sendfile() is not really portable,
3101 hence the _LINUX specificness.
3103 TF/01 In the add_headers option to the mail command in an Exim filter,
3104 there was a bug that Exim would claim a syntax error in any
3105 header after the first one which had an odd number of characters
3108 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3109 callout verification, Exim cached a "reject" for the entire domain. This
3110 is correct for most verifications, but it is not correct for a recipient
3111 verification with use_sender or use_postmaster set, because in that case
3112 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3113 case of MAIL FROM:<> rejection from other early rejections (e.g.
3114 rejection of HELO). When verifying a recipient using a non-null MAIL
3115 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3116 Whatever the result of the callout, the value of the domain cache is
3117 left unchanged (for any other kind of callout, getting as far as trying
3118 RCPT means that the domain itself is ok).
3120 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3123 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3124 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3125 session, the daemon ignores ECONNECT errors and logs others; it now
3126 ignores EPIPE as well.
3128 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3129 (quoted-printable decoding).
3131 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3132 later the small subsequent patch to fix an introduced bug.
3134 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3136 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3138 PH/08 An error is now given if message_size_limit is specified negative.
3140 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3141 to be given (somewhat) arbitrary names.
3143 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3146 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3147 miscellaneous code fixes
3149 PH/10 Added the log_reject_target ACL modifier to specify where to log
3152 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3153 hostname. This is wrong, because it relates to the incoming message (and
3154 probably the interface on which it is arriving) and not to the outgoing
3155 callout (which could be using a different interface). This has been
3156 changed to use the value of the helo_data option from the smtp transport
3157 instead - this is what is used when a message is actually being sent. If
3158 there is no remote transport (possible with a router that sets up host
3159 addresses), $smtp_active_hostname is used.
3161 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3162 tweaks were necessary in order to get it to work (see also 21 below):
3163 (a) The code assumed that strncpy() returns a negative number on buffer
3164 overflow, which isn't the case. Replaced with Exim's string_format()
3166 (b) There were several signed/unsigned issues. I just did the minimum
3167 hacking in of casts. There is scope for a larger refactoring.
3168 (c) The code used strcasecmp() which is not a standard C function.
3169 Replaced with Exim's strcmpic() function.
3170 (d) The code set only $1; it now sets $auth1 as well.
3171 (e) A simple test gave the error "authentication client didn't specify
3172 service in request". It would seem that Dovecot has changed its
3173 interface. Fortunately there's a specification; I followed it and
3174 changed what the client sends and it appears to be working now.
3176 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3179 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3180 address A is aliased to B and C, where B exists and C does not. Without
3181 -v the output is "A verified" because verification stops after a
3182 successful redirection if more than one address is generated. However,
3183 with -v the child addresses are also verified. Exim was outputting "A
3184 failed to verify" and then showing the successful verification for C,
3185 with its parentage. It now outputs "B failed to verify", showing B's
3186 parentage before showing the successful verification of C.
3188 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3189 look up a TXT record in a specific list after matching in a combined
3192 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3193 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3194 they consult the DNS. I had assumed they would set it the way they
3195 wanted; and indeed my experiments on Linux seem to show that in some
3196 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3197 To be on the safe side, however, I have now made the interface to
3198 host_find_byname() similar to host_find_bydns(), with an argument
3199 containing the DNS resolver options. The host_find_byname() function now
3200 sets these options at its start, just as host_find_bydns() does. The smtp
3201 transport options dns_qualify_single and dns_search_parents are passed to
3202 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3203 of host_find_byname() use the default settings of RES_DEFNAMES
3204 (qualify_single) but not RES_DNSRCH (search_parents).
3206 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3207 spool_read_header() do less string testing, by means of a preliminary
3208 switch on the second character of optional "-foo" lines. (This is
3209 overdue, caused by the large number of possibilities that now exist.
3210 Originally there were few.) While I was there, I also converted the
3211 str(n)cmp tests so they don't re-test the leading "-" and the first
3212 character, in the hope this might squeeze out yet more improvement.
3214 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3215 flag allowing group syntax was set by the header_syntax check but not
3216 turned off, possible causing trouble later; (2) The flag was not being
3217 set at all for the header_verify test, causing "group"-style headers to
3218 be rejected. I have now set it in this case, and also caused header_
3219 verify to ignore an empty address taken from a group. While doing this, I
3220 came across some other cases where the code for allowing group syntax
3221 while scanning a header line wasn't quite right (mostly, not resetting
3222 the flag correctly in the right place). These bugs could have caused
3223 trouble for malformed header lines. I hope it is now all correct.
3225 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3226 with the "reply" argument non-NULL. The code, however (which originally
3227 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3228 but it didn't always do it. This confused somebody who was copying the
3229 code for some other use. I have removed all the tests.
3231 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3232 feature that was used to support insecure browsers during the U.S. crypto
3233 embargo. It requires special client support, and Exim is probably the
3234 only MTA that supported it -- and would never use it because real RSA is
3235 always available. This code has been removed, because it had the bad
3236 effect of slowing Exim down by computing (never used) parameters for the
3237 RSA_EXPORT functionality.
3239 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3240 authenticator to fail if there's a tab character in the incoming data
3241 (there should never be unless someone is messing about, as it's supposed
3242 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3243 if the connection is using TLS or if the remote IP is the same as the
3244 local IP, and the "valid-client-cert option" if a client certificate has
3247 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3248 authenticators. This can be used for authorization after authentication
3249 succeeds. (In the case of plaintext, it servers for both authentication
3252 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3253 if any retry times were supplied.
3255 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3256 connection, where there is no client IP address to check. In this
3257 situation, the verify now always succeeds.
3259 PH/25 Applied John Jetmore's -Mset patch.
3261 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3263 PH/27 In a string expansion for a processed (not raw) header when multiple
3264 headers of the same name were present, leading whitespace was being
3265 removed from all of them, but trailing whitespace was being removed only
3266 from the last one. Now trailing whitespace is removed from each header
3267 before concatenation. Completely empty headers in a concatenation (as
3268 before) are ignored.
3270 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3271 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3273 PH/29 [Removed. This was a change that I later backed out, and forgot to
3274 correct the ChangeLog entry (that I had efficiently created) before
3275 committing the later change.]
3277 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3278 address errors (4xx response to RCPT) over the same connection as other
3279 messages routed to the same hosts. Such deliveries are always "forced",
3280 so retry times are not inspected. This resulted in far too many retries
3281 for the affected addresses. The effect occurred only when there were more
3282 hosts than the hosts_max_try setting in the smtp transport when it had
3283 the 4xx errors. Those hosts that it had tried were not added to the list
3284 of hosts for which the message was waiting, so if all were tried, there
3285 was no problem. Two fixes have been applied:
3287 (i) If there are any address or message errors in an SMTP delivery, none
3288 of the hosts (tried or untried) are now added to the list of hosts
3289 for which the message is waiting, so the message should not be a
3290 candidate for sending over the same connection that was used for a
3291 successful delivery of some other message. This seems entirely
3292 reasonable: after all the message is NOT "waiting for some host".
3293 This is so "obvious" that I'm not sure why it wasn't done
3294 previously. Hope I haven't missed anything, but it can't do any
3295 harm, as the worst effect is to miss an optimization.
3297 (ii) If, despite (i), such a delivery is accidentally attempted, the
3298 routing retry time is respected, so at least it doesn't keep
3299 hammering the server.
3301 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3302 in ${readsocket because some servers need this prod.
3304 PH/32 Added some extra debug output when updating a wait-xxx database.
3306 PH/33 The hint "could be header name not terminated by colon", which has been
3307 given for certain expansion errors for a long time, was not being given
3308 for the ${if def:h_colon_omitted{... case.
3310 PH/34 The spec says: "With one important exception, whenever a domain list is
3311 being scanned, $domain contains the subject domain." There was at least
3312 one case where this was not true.
3314 PH/35 The error "getsockname() failed: connection reset by peer" was being
3315 written to the panic log as well as the main log, but it isn't really
3316 panic-worthy as it just means the connection died rather early on. I have
3317 removed the panic log writing for the ECONNRESET error when getsockname()
3320 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3321 runs only) independently of the message's sender address. This meant
3322 that, if the 4xx error was in fact related to the sender, a different
3323 message to the same recipient with a different sender could confuse
3324 things. In particular, this can happen when sending to a greylisting
3325 server, but other circumstances could also provoke similar problems.
3326 I have changed the default so that the retry time for these errors is now
3327 based a combination of the sender and recipient addresses. This change
3328 can be overridden by setting address_retry_include_sender=false in the
3331 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3332 remote server are returned as part of bounce messages. This was not
3333 happening for LMTP over a pipe (the lmtp transport), but now it is the
3334 same for both kinds of LMTP.
3336 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3337 in header lines that were in fact CNAMEs. This is no longer the case.
3339 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3340 and queue runs started by the daemon processed all messages. This has
3341 been fixed so that -R and -S can now usefully be given with -q<time>.
3343 PH/40 Import PCRE release 6.7 (fixes some bugs).
3345 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3347 PH/42 Give an error if -q is specified more than once.
3349 PH/43 Renamed the variables $interface_address and $interface_port as
3350 $received_ip_address and $received_port, to make it clear that these
3351 values apply to message reception, and not to the outgoing interface when
3352 a message is delivered. (The old names remain recognized, of course.)
3354 PH/44 There was no timeout on the connect() call when using a Unix domain
3355 socket in the ${readsocket expansion. There now is.
3357 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3358 be meaningful with "accept".
3360 SC/01 Eximstats V1.43
3361 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3363 SC/02 Eximstats V1.44
3364 Use a glob alias rather than an array ref in the generated
3365 parser. This improves both readability and performance.
3367 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3368 Collect SpamAssassin and rejection statistics.
3369 Don't display local sender or destination tables unless
3370 there is data to show.
3371 Added average volumes into the top table text output.
3373 SC/04 Eximstats V1.46
3374 Collect data on the number of addresses (recipients)
3375 as well as the number of messages.
3377 SC/05 Eximstats V1.47
3378 Added 'Message too big' to the list of mail rejection
3379 reasons (thanks to Marco Gaiarin).
3381 SC/06 Eximstats V1.48
3382 Mainlog lines which have GMT offsets and are too short to
3383 have a flag are now skipped.
3385 SC/07 Eximstats V1.49 (Alain Williams)
3386 Added the -emptyok flag.
3388 SC/08 Eximstats V1.50
3389 Fixes for obtaining the IP address from reject messages.
3391 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3392 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3393 whitespace changes from 4.64-PH/27
3395 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3398 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3399 are found, allow negative numbers in numeric criteria)
3401 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3403 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3404 to match changes made in 4.64-PH/43
3406 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3408 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3409 "domain" is actually an IP address, and force a failure. This locks out
3410 those revolvers/nameservers that support "A-for-A" lookups, in
3411 contravention of the specifications.
3413 PH/48 When a host name was looked up from an IP address, and the subsequent
3414 forward lookup of the name timed out, the host name was left in
3415 $sender_host_name, contrary to the specification.
3417 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3418 restricted to single-key lookups, Exim was not diagnosing an error if
3419 * or *@ was used with a query-style lookup.
3421 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3423 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3424 long ago, but noone interested enough thought of it. Let's just say that
3425 the "1.1" means that there are some new functions that weren't there at
3426 some point in the past.
3428 PH/51 Error processing for expansion failure of helo_data from an smtp
3429 transport during callout processing was broken.
3431 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3432 tested/used via the -bh/-bhc/-bs options.
3434 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3435 bug, fixed in subsequent PCRE releases).
3437 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3438 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3440 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3446 SC/01 Use a glob alias rather than an array ref in eximstats generated
3447 parser. This improves both readability and performance.
3449 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3450 Don't display local sender or destination tables in eximstats unless
3451 there is data to show.
3452 Added average volumes into the eximstats top table text output.
3454 SC/03 Collect data on the number of addresses (recipients) as well
3455 as the number of messages in eximstats.
3457 TF/01 Correct an error in the documentation for the redirect router. Exim
3458 does (usually) call initgroups() when daemonizing.
3460 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3461 with consistent privilege compared to when running as a daemon.
3463 TF/03 Note in the spec that $authenticated_id is not set for local
3464 submissions from trusted users.
3466 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3467 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3469 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3470 by adding some example configuration directives to the default
3471 configuration file. A little bit of work is required to uncomment the
3472 directives and define how usernames and passwords are checked, but
3473 there is now a framework to start from.
3475 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3476 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3477 without this. I don't know how relevant this is to other LDAP libraries.
3479 PH/02 Add the verb name to the "unknown ACL verb" error.
3481 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3483 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3485 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3486 directory not expanded when it should be if an expanded home directory
3487 was set for the address (which is overridden by the transport).
3489 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3492 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3493 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3494 because it is too late at that time, and has no effect.
3496 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3497 security issue with \' (bugzilla #107). I could not use the
3498 PQescapeStringConn() function, because it needs a PGconn value as one of
3501 PH/08 When testing addresses using -bt, indicate those final addresses that
3502 are duplicates that would not cause an additional delivery. At least one
3503 person was confused, thinking that -bt output corresponded to deliveries.
3504 (Suppressing duplicates isn't a good idea as you lose the information
3505 about possibly different redirections that led to the duplicates.)
3507 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3508 systems where poll() doesn't work, in particular OS X.
3510 PH/10 Added more information to debugging output for retry time not reached.
3512 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3513 operations in malware.c.
3515 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3518 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3519 syslog_duplication set false, log lines that would normally be written
3520 both the the main log and to the reject log were not written to syslog at
3523 PH/14 In the default configuration, change the use of "message" in ACL warn
3524 statements to "add_header".
3526 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3527 not followed by a command (e.g. "seen endif").
3529 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3530 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3533 PH/17 Added extra conditions to the default value of delay_warning_condition
3537 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3538 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3539 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3542 The Auto-Submitted: and various List- headers are standardised, whereas I
3543 don't think Precedence: ever was.
3545 PH/18 Refactored debugging code in route_finduser() to show more information,
3546 in particular, the error code if getpwnam() issues one.
3548 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3549 This is apparently needed in addition to the PH/07 change above to avoid
3550 any possible encoding problems.
3552 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3553 but not after initializing Perl.
3555 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3556 output them only if debugging. By default they are written stderr,
3557 apparently, which is not desirable.
3559 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3562 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3565 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3567 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3568 authenticated or an ident call has been made. Suppress the default
3569 values for $authenticated_id and $authenticated_sender (but permit -oMai
3570 and -oMas) when testing with -bh.
3572 PH/24 Re-jigged the order of the tests in the default configuration so that the
3573 tests for valid domains and recipients precede the DNS black list and CSA
3574 tests, on the grounds that those ones are more expensive.
3576 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3577 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3578 This bug exists in every version of Exim that I still have, right back to
3581 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3582 However, an attempt to turn on case-sensitivity in a regex key by
3583 including (?-i) didn't work because the subject string was already
3584 lowercased, and the effects were non-intuitive. It turns out that a
3585 one-line patch can be used to allow (?-i) to work as expected.
3591 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3592 other effects) broke the use of negated acl sub-conditions.
3594 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3597 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3598 "Deny" causes Exim to reject the incoming connection with a 554 error.
3599 Unfortunately, if there is a major crisis, such as a disk failure,
3600 tcp-wrappers gives "deny", whereas what one would like would be some
3601 kind of temporary error. A kludge has been added to help with this.
3602 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3603 554 error is used if errno is still zero or contains ENOENT (which occurs
3604 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3607 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3609 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3610 errors. Otherwise a message that provokes a temporary error (when other
3611 messages do not) can cause a whole host to time out.
3613 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3614 addresses were routed directly to files or pipes from a redirect router.
3615 File deliveries just didn't batch; pipe deliveries might have suffered
3618 PH/06 A failure to get a lock for a hints database would erroneously always say
3619 "Failed to get write lock", even when it was really a read lock.
3621 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3622 of 0600. This has been changed to use the value of the lockfile_mode
3623 option (which defaults to 0600).
3625 PH/08 Applied small patch from the Sieve maintainer.
3627 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3628 folder from quota calculations, a direct delivery into this folder messed
3629 up the contents of the maildirsize file. This was because the regex was
3630 used only to exclude .Trash (or whatever) when the size of the mailbox
3631 was calculated. There was no check that a delivery was happening into an
3632 excluded directory. This bug has been fixed by ignoring all quota
3633 processing for deliveries into excluded directories.
3635 PH/10 Added the maildirfolder_create_regex option to appendfile.
3641 PH/01 The code for finding all the local interface addresses on a FreeBSD
3642 system running IPv6 was broken. This may well have applied to all BSD
3643 systems, as well as to others that have similar system calls. The broken
3644 code found IPv4 interfaces correctly, but gave incorrect values for the
3645 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3646 that it would not match correctly against @[] and not recognize the IPv6
3649 PH/02 The ipliteral router was not recognizing addresses of the form user@
3650 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3652 PH/03 Added disable_ipv6.
3654 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3655 decoded form, because it is most often used to construct To: headers
3656 lines in autoreplies, and the decoded form may well be syntactically
3657 invalid. However, $reply_address has leading white space removed, and all
3658 newlines turned into spaces so that the autoreply transport does not
3661 PH/05 If group was specified without a user on a router, and no group or user
3662 was specified on a transport, the group from the router was ignored.
3664 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3665 for visible compile-time settings that can be used to change these
3666 numbers, for those that want even more. Backwards compatibility with old
3667 spool files has been maintained. However, going back to a previous Exim
3668 release will lost any variables that are in spool files.
3670 PH/07 Two small changes when running in the test harness: increase delay when
3671 passing a TCP/IP connection to a new process, in case the original
3672 process has to generate a bounce, and remove special handling of
3673 127.0.0.2 (sic), which is no longer necessary.
3675 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3676 be the same on different OS.
3678 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3681 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3682 whether --show-vars was specified or not
3684 JJ/02 exipick: Added support for new ACL variable spool format introduced
3687 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3688 syntactically invalid From: or Reply-to: line, and a filter used this to
3689 generate an autoreply, and therefore failed to obtain an address for the
3690 autoreply, Exim could try to deliver to a non-existent relative file
3691 name, causing unrelated and misleading errors. What now happens is that
3692 it logs this as a hard delivery error, but does not attempt to create a
3695 PH/11 The exinext utility has a -C option for testing purposes, but although
3696 the given file was scanned by exinext itself; it wasn't being passed on
3697 when Exim was called.
3699 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3700 an end-of-file indication when reading a command response.
3702 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3703 compiled. In many other places in Exim, IPv6 addresses are always
3704 recognized, so I have changed this. It also means that IPv4 domain
3705 literals of the form [IPV4:n.n.n.n] are now always recognized.
3707 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3708 used if the router is not running as root, for example, when verifying at
3709 ACL time, or when using -bh. The debugging output from this situation was
3710 non-existent - all you got was a failure to exec. I have made two
3713 (a) Failures to set uid/gid, the current directory, or a process leader
3714 in a subprocess such as that created by queryprogram now generate
3715 suitable debugging output when -d is set.
3717 (b) The queryprogram router detects when it is not running as root,
3718 outputs suitable debugging information if -d is set, and then runs
3719 the subprocess without attempting to change uid/gid.
3721 PH/15 Minor change to Makefile for building test_host (undocumented testing
3724 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3725 additional section of a DNS packet that returns MX or SRV records.
3726 Instead, it always explicitly searches for A/AAAA records. This avoids
3727 major problems that occur when a DNS server includes only records of one
3728 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3729 fixed another bug: if SRV records were looked up and the corresponding
3730 address records were *not* found in the additional section, the port
3731 values from the SRV records were lost.
3733 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3734 using the correct key (the original address) when searching the retry
3735 rules in order to find which one to use for generating the retry hint.
3737 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3738 adding the default one. Similarly, if it contains a Reply-To: header, the
3739 errors_reply_to option, if set, is not used.
3741 PH/19 When calculating a retry time, Exim used to measure the "time since
3742 failure" by looking at the "first failed" field in the retry record. Now
3743 it does not use this if it is later than than the arrival time of the
3744 message. Instead it uses the arrival time. This makes for better
3745 behaviour in cases where some deliveries succeed, thus re-setting the
3746 "first failed" field. An example is a quota failure for a huge message
3747 when small messages continue to be delivered. Without this change, the
3748 "time since failure" will always be short, possible causing more frequent
3749 delivery attempts for the huge message than are intended.
3750 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3752 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3753 $1, $2, $3) because the numerical variables can be reset during some
3754 expansion items (e.g. "match"), thereby losing the authentication data.
3756 PH/21 Make -bV show the size of off_t variables so that the test suite can
3757 decide whether to run tests for quotas > 2G.
3759 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3760 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3761 filecount value is greater than 2G or if a quota value is greater than 2G
3762 on a system where the size of off_t is not greater than 4, a panic error
3765 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3766 never match. The debug and -bh output now contains an explicit error
3767 message indicating a malformed IPv4 address or mask.
3769 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3770 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3771 PH/23 above applies.
3773 PH/25 Do not write to syslog when running in the test harness. The only
3774 occasion when this arises is a failure to open the main or panic logs
3775 (for which there is an explicit test).
3777 PH/26 Added the /no_tell option to "control=freeze".
3779 PH/27 If a host name lookup failed very early in a connection, for example, if
3780 the IP address matched host_lookup and the reverse lookup yielded a name
3781 that did not have a forward lookup, an error message of the form "no IP
3782 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3783 could be logged. Now it outputs the IP address instead of "NULL".
3785 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3786 allows the sender and the authenticated sender to be set when
3787 submitting a message from within Exim. Since child_open_exim() is
3788 documented for local_scan(), the new function should be too.
3790 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3791 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3792 results in an empty string is now treated as unset.
3794 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3796 PH/31 Added sender_verify_fail logging option.
3798 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3799 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3800 tidied the source and removed it altogether.
3802 PH/33 When a queue run was abandoned because the load average was too high, a
3803 log line was always written; now it is written only if the queue_run log
3804 selector is set. In addition, the log line for abandonment now contains
3805 information about the queue run such as the pid. This is always present
3806 in "start" and "stop" lines but was omitted from the "abandon" line.
3808 PH/34 Omit spaces between a header name and the colon in the error message that
3809 is given when verify = headers_syntax fails (if there are lots of them,
3810 the message gets confusing).
3812 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3813 names, as there are now some PTR records that contain slashes. This check
3814 is only to protect against broken name servers that fall over on strange
3815 characters, so the fact that it applies to all lookups doesn't matter.
3817 PH/36 Now that the new test suite is complete, we can remove some of the
3818 special code in Exim that was needed for the old test suite. For example,
3819 sorting DNS records because real resolvers return them in an arbitrary
3820 order. The new test suite's fake resolver always returns records in the
3823 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3824 bounces) except when queue_only is set, to avoid logging races between
3825 the different processes.
3827 PH/38 Panic-die if .include specifies a non-absolute path.
3829 PH/39 A tweak to the "H" retry rule from its user.
3831 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3832 a label. They prevented compilation on older perls.
3834 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3835 a warning to be raised on newish perls.
3837 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3838 on queue. Changes to match documented behaviour of showing count of
3839 messages matching specified criteria.
3841 PH/40 Changed the default ident timeout from 30s to 5s.
3843 PH/41 Added support for the use of login_cap features, on those BSD systems
3844 that have them, for controlling the resources used by pipe deliveries.
3846 PH/42 The content-scanning code uses fopen() to create files in which to put
3847 message data. Previously it was not paying any attention to the mode of
3848 the files. Exim runs with umask(0) because the rest of the code creates
3849 files with open(), and sets the required mode explicitly. Thus, these
3850 files were ending up world-writeable. This was not a big issue, because,
3851 being within the spool directory, they were not world-accessible. I have
3852 created a function called modefopen, which takes an additional mode
3853 argument. It sets umask(777), creates the file, chmods it to the required
3854 mode, then resets the umask. All the relevant calls to fopen() in the
3855 content scanning code have been changed to use this function.
3857 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3858 to 24 hours. This avoids potential overflow problems when processing G
3859 and H retry rules. I suspect nobody ever tinkers with this value.
3861 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3863 PH/45 When the plaintext authenticator is running as a client, the server's
3864 challenges are checked to ensure they are valid base64 strings. By
3865 default, the authentication attempt is cancelled if an invalid string is
3866 received. Setting client_ignore_invalid_base64 true ignores these errors.
3867 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3868 they are received. Thus, the responses can be made to depend on the
3869 challenges. If an invalid string is ignored, an empty string is placed in
3872 PH/46 Messages that are created by the autoreply transport now contains a
3873 References: header, in accordance with RFCs 2822 and 3834.
3875 PH/47 Added authenticated_sender_force to the smtp transport.
3877 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3879 PH/49 Installed latest patch from the Sieve maintainer.
3881 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3882 was also set, the appendfile transport was unnecessarily scanning a
3883 directory of message files (e.g. for maildir delivery) to find the count
3884 of files (along with the size), even though it did not need this
3885 information. It now does the scan only if it needs to find either the
3886 size of the count of files.
3888 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3890 PH/52 Two bugs concerned with error handling when the smtp transport is
3893 (i) Exim was not creating retry information for temporary errors given
3894 for individual recipients after the DATA command when the smtp transport
3895 was used in LMTP mode. This meant that they could be retried too
3896 frequently, and not timed out correctly.
3898 (ii) Exim was setting the flag that allows error details to be returned
3899 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3900 recipients that were returned after the DATA command.
3902 PH/53 This is related to PH/52, but is more general: for any failing address,
3903 when detailed error information was permitted to be returned to the
3904 sender, but the error was temporary, then after the final timeout, only
3905 "retry timeout exceeded" was returned. Now it returns the full error as
3906 well as "retry timeout exceeded".
3908 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3909 do this, and (what is worse) MTAs that accept it.
3911 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3912 will now be deprecated.
3914 PH/56 New os.c-cygwin from the Cygwin maintainer.
3916 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3917 formats (previously only available in exim formats via -bpr, -bpru,
3918 and -bpra. Now also available in native and exiqgrep formats)
3920 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3921 with very large, slow to parse queues
3923 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3925 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3927 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3928 responses to authentication challenges, though it was showing the
3929 challenges; (ii) I've removed the CR characters from the debug output for
3932 PH/58 Allow for the insertion of a newline as well as a space when a string
3933 is turned into more than one encoded-word during RFC 2047 encoding. The
3934 Sieve code now uses this.
3936 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3937 data_4xx, lost_connection, tls_required.
3939 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3940 message was being sent as an SMTP response.
3942 PH/61 Add -l and -k options to exicyclog.
3944 PH/62 When verifying, if an address was redirected to one new address, so that
3945 verification continued, and the new address failed or deferred after
3946 having set something in $address_data, the value of $address_data was not
3947 passed back to the ACL. This was different to the case when no
3948 redirection occurred. The value is now passed back in both cases.
3950 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3951 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3952 use login_cap.h, so on its own it isn't the distinguishing feature. The
3953 new name refers directly to the setclassresources() function.
3955 PH/65 Added configuration files for NetBSD3.
3957 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3959 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3960 is preferred over IPv4.
3962 PH/68 The bounce_return_message and bounce_return_body options were not being
3963 honoured for bounces generated during the reception of non-SMTP messages.
3964 In particular, this applied to messages rejected by the ACL. This bug has
3965 been fixed. However, if bounce_return_message is true and bounce_return_
3966 body is false, the headers that are returned for a non-SMTP message
3967 include only those that have been read before the error was detected.
3968 (In the case of an ACL rejection, they have all been read.)
3970 PH/69 The HTML version of the specification is now built in a directory called
3971 spec_html instead of spec.html, because the latter looks like a path with
3972 a MIME-type, and this confuses some software.
3974 PH/70 Catch two compiler warnings in sieve.c.
3976 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3977 function verify_get_ident() calls ip_connect() to connect a socket, but
3978 if the "connect()" function timed out, ip_connect() used to close the
3979 socket. However, verify_get_ident() also closes the socket later, and in
3980 between Exim writes to the log, which may get opened at this point. When
3981 the socket was closed in ip_connect(), the log could get the same file
3982 descriptor number as the socket. This naturally causes chaos. The fix is
3983 not to close the socket in ip_connect(); the socket should be closed by
3984 the function that creates it. There was only one place in the code where
3985 this was missing, in the iplookup router, which I don't think anybody now
3986 uses, but I've fixed it anyway.
3988 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3989 well as to direct DNS lookups. Otherwise the handling of names in host
3990 lists is inconsistent and therefore confusing.
3996 PH/01 Two changes to the default runtime configuration:
3998 (1) Move the checks for relay_from_hosts and authenticated clients from
3999 after to before the (commented out) DNS black list checks.
4001 (2) Add control=submission to the relay_from_hosts and authenticated
4002 clients checks, on the grounds that messages accepted by these
4003 statements are most likely to be submissions.
4005 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4007 (1) Generate an error if the third argument for the ${prvs expansion is
4010 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4013 (3) Reset the variables that are obtained from the first argument of
4014 ${prvscheck and used in the second argument before leaving the code,
4015 because their memory is reclaimed, so using them afterwards may do
4018 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4019 one (it's much easier than Tom thought :-).
4021 (5) Because of (4), we can now allow for the use of $prvscheck_result
4022 inside the third argument.
4024 PH/03 For some reason, the default setting of PATH when running a command from
4025 a pipe transport was just "/usr/bin". I have changed it to
4028 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4029 anything to be listed in the output from -bV.
4031 PH/05 When a filter generated an autoreply, the entire To: header line was
4032 quoted in the delivery log line, like this:
4034 => >A.N.Other <ano@some.domain> <original@ddress> ...
4036 This has been changed so that it extracts the operative address. There
4037 may be more than one such address. If so, they are comma-separated, like
4040 => >ano@some.domain,ona@other.domain <original@ddress> ...
4042 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4043 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4044 not being looked up in the rDNS to get a host name, Exim was showing the
4045 IP address twice in Received: lines, even though the IP addresses were
4046 identical. For example:
4048 Received: from [1.2.3.4] (helo=[1.2.3.4])
4050 However, if the real host name was known, it was omitting the HELO data
4051 if it matched the actual IP address. This has been tidied up so that it
4052 doesn't show the same IP address twice.
4054 PH/07 When both +timestamp and +memory debugging was on, the value given by
4055 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4056 called by the debug printing, thereby overwriting the timestamp buffer.
4057 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4059 PH/08 When the original message was included in an autoreply transport, it
4060 always said "this is a copy of the message, including all the headers",
4061 even if body_only or headers_only was set. It now gives an appropriate
4064 PH/09 Applied a patch from the Sieve maintainer which:
4066 o fixes some comments
4067 o adds the (disabled) notify extension core
4068 o adds some debug output for the result of if/elsif tests
4069 o points to the current vacation draft in the documentation
4070 and documents the missing references header update
4074 o fixes a bug in processing the envelope test (when testing
4075 multiple envelope elements, the last element determined the
4078 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4079 Electronic Mail") by including:
4081 Auto-submitted: auto-generated
4083 in the messages that it generates (bounce messages and others, such as
4084 warnings). In the case of bounce messages for non-SMTP messages, there was
4085 also a typo: it was using "Auto_submitted" (underscore instead of
4086 hyphen). Since every message generated by Exim is necessarily in response
4087 to another message, thes have all been changed to:
4089 Auto-Submitted: auto-replied
4091 in accordance with these statements in the RFC:
4093 The auto-replied keyword:
4095 - SHOULD be used on messages sent in direct response to another
4096 message by an automatic process,
4098 - MUST NOT be used on manually-generated messages,
4100 - MAY be used on Delivery Status Notifications (DSNs) and Message
4101 Disposition Notifications (MDNs),
4103 - MUST NOT be used on messages generated by automatic or periodic
4104 processes, except for messages which are automatic responses to
4107 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4108 to the default Received: header definition.
4110 PH/12 Added log selector acl_warn_skipped (default on).
4112 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4113 variables because (a) they are in the wrong storage pool and (b) even if
4114 they were copied, it wouldn't work properly because of the caching.
4116 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4117 checking when decoding. Apparently there are clients that generate
4118 overlong encoded strings. Why am I not surprised?
4120 PH/15 If the first argument of "${if match_address" was not empty, but did not
4121 contain an "@" character, Exim crashed. Now it writes a panic log message
4122 and treats the condition as false.
4124 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4126 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4127 extension "envelope-auth". The code is finished and in agreement with
4128 other implementations, but there is no documentation so far and in fact,
4129 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4130 not changing the active code.
4132 Print executed "if" and "elsif" statements when debugging is used. This
4133 helps a great deal to understand what a filter does.
4135 Document more things not specified clearly in RFC3028. I had all this
4136 sorted out, when out of a sudden new issues came to my mind. Oops."
4138 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4141 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4142 canonical form (as documented). However, after a host name lookup from
4143 the IP address, check_host() was doing a simple string comparison with
4144 addresses acquired from the DNS when checking that the found name did
4145 have the original IP as one of its addresses. Since any found IPv6
4146 addresses are likely to be in abbreviated form, the comparison could
4147 fail. Luckily, there already exists a function for doing the comparison
4148 by converting both addresses to binary, so now that is used instead of
4149 the text comparison.
4151 PH/20 There was another similar case to PH/19, when a complete host name was
4152 given in a host list; looking up its IP address could give an abbreviated
4153 form, whereas the current host's name might or might not be abbreviated.
4154 The same fix has been applied.
4160 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4161 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4164 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4165 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4167 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4169 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4170 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4171 Also, for "Auto-Submitted", treat anything other than "no" as
4172 non-personal, in accordance with RFC 3834. (Previously it treated
4173 anything starting "auto-" as non-personal.)
4175 TF/01 The control=submission/name=... option had a problem with syntax
4176 errors if the name included a slash character. The /name= option
4177 now slurps the rest of the string, so it can include any characters
4178 but it must come last in the list of options (after /sender_retain
4181 PH/05 Some modifications to the interface to the fake nameserver for the new
4189 TK/01 Added the "success_on_redirect" address verification option. See
4190 NewStuff for rationale and an example.
4192 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4194 PH/02 Patch to exigrep to allow it to work on syslog lines.
4196 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4197 fread() to skip over the body file's header line, because in Cygwin the
4198 header line is locked and is inaccessible.
4200 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4201 co-exist for some time) to make it clear that it is the Exim ID that is
4202 referenced, not the Message-ID: header line.
4204 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4205 string_format() function, because snprintf() does not exist on all
4208 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4209 ${stat: expansion item.
4211 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4212 protocol synchronization error", to keep the pedants happy.
4214 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4215 well as for IRIX systems, when gcc is being used. See the host.c source
4218 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4220 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4223 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4224 transport and to the smtp transport in LMTP mode.
4226 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4228 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4229 run a filter in a subprocess. This could lead to confusion in subsequent
4230 lookups in the parent process. There should also be a search_tidyup() at
4231 the end of the subprocess.
4233 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4234 only if the host matched helo_try_verify_hosts, which caused the
4235 verification to occur when the EHLO/HELO command was issued. The ACL just
4236 tested the remembered result. Now, if a previous verification attempt has
4237 not happened, "verify = helo" does it there and then.
4239 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4241 TK/03 Fix log output including CR from clamd.
4243 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4244 exist provoked a memory error which could cause a segfault.
4246 PH/15 Installed PCRE 6.2
4248 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4250 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4251 of the problem. Specifically, suggested +O2 rather than +O1 for the
4254 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4256 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4257 record, the port was not correctly logged when the outgoing_port log
4258 selector was set (it logged the transort's default port).
4260 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4261 fallback_hosts, and "hosts" in the smtp transport.
4263 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4264 host errors such as "Connection refused".
4266 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4267 authentication with radiusclient 0.4.9:
4269 - Error returned from rc_read_config was caught wrongly
4270 - Username/password not passed on to radius server due to wrong length.
4272 The presumption is that some radiusclient API changes for 4.51/PH/17
4273 were not taken care of correctly. The code is still untested by me (my
4274 Linux distribution still has 0.3.2 of radiusclient), but it was
4275 contributed by a Radius user.
4277 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4278 expanding the "port" option of the smtp transport.
4280 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4281 while reading a MIME header. Thanks to Tom Hughes for a patch.
4283 PH/24 Include config.h inside local_scan.h so that configuration settings are
4286 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4287 that in an ACL for RCPT (for example), you can examine exactly what was
4290 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4291 commands, but it was not correctly comparing the address with the actual
4292 client host address. Thus, it would show the EHLO address in Received:
4293 header lines when this was not necessary.
4295 PH/27 Added the % operator to ${eval:}.
4297 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4298 it should be ignoring failures (because with -C, for example, it has lost
4299 privilege). It wasn't ignoring creation failures other than "already
4302 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4305 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4306 because an input line was too long, either on its own, or by virtue of
4307 too many continuations, the temporary file was not being removed, and the
4308 return code was incorrect.
4310 PH/31 Missing "BOOL" in function definition in filtertest.c.
4312 PH/32 Applied Sieve patches from the maintainer.
4314 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4316 PH/33 Added "verify = not_blind".
4318 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4319 Local/Makefile (with some defaults set). These are used in built scripts
4320 such as exicyclog, but they have never been used in the exim_install
4321 script (though there are many overriding facilities there). I have
4322 arranged that the exim_install script now takes note of these two
4325 PH/35 Installed configuration files for Dragonfly.
4327 PH/36 When a locally submitted message by a trusted user did not contain a
4328 From: header, and the sender address was obtained from -f or from an SMTP
4329 MAIL command, and the trusted user did not use -F to supply a sender
4330 name, $originator_name was incorrectly used when constructing a From:
4331 header. Furthermore, $originator_name was used for submission mode
4332 messages from external hosts without From: headers in a similar way,
4333 which is clearly wrong.
4335 PH/37 Added control=suppress_local_fixups.
4337 PH/38 When log_selector = +received_sender was set, and the addition of the
4338 sender made the log line's construction buffer exactly full, or one byte
4339 less than full, an overflow happened when the terminating "\n" was
4342 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4343 when the result of a list match is failure because a DNS lookup failed.
4345 PH/40 RM_COMMAND is now used in the building process.
4347 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4348 the "build-* directories that it finds.
4350 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4351 address in a domain literal was a prefix of an interface address.
4353 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4354 when verifying a sender address, unless rewrite_headers is false.
4356 PH/44 Wrote a long comment about why errors_to addresses are verified as
4357 recipients, not senders.
4359 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4360 the ratelimit ACL was added.
4362 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4364 PH/46 Added extra information about PostgreSQL errors to the error string.
4366 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4367 avoiding the need to install special zones in a real server. This is
4368 backwards compatible; if it can't find the fake resolver, it drops back.
4369 Thus, both old and new test suites can be run.
4371 TF/02 Added util/ratelimit.pl
4373 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4374 clock is set back in time.
4376 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4377 Candler <B.Candler@pobox.com>.
4379 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4380 OK for addresses that are the result of redirections.
4382 PH/48 A number of further additions for the benefit of the new test suite,
4383 including a fake gethostbyname() that interfaces to the fake DNS resolver
4386 TF/06 The fix for widen_domains has also been applied to qualify_single and
4387 search_parents which are the other dnslookup options that can cause
4390 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4393 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4395 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4396 service" if it encountered an MX record with an empty target hostname.
4397 The message is now "an MX or SRV record indicated no SMTP service".
4399 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4400 if the DNS of the sending site is misconfigured. This is quite a
4401 common situation. This change restores the behaviour of treating a
4402 helo verification defer as a failure.
4404 PH/51 If self=fail was set on a router, the bounce message did not include the
4405 actual error message.
4411 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4413 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4414 command itself ended in error, the underlying message about the transport
4415 filter timeout was being overwritten with the pipe command error. Now the
4416 underlying error message should be appended to the second error message.
4418 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4420 PH/02 Reduce the amount of output that "make" produces by default. Full output
4421 can still be requested.
4423 PH/03 The warning log line about a condition test deferring for a "warn" verb
4424 was being output only once per connection, rather than after each
4425 occurrence (because it was using the same function as for successful
4426 "warn" verbs). This seems wrong, so I have changed it.
4428 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4429 it should not have, which might have caused a crash in the right
4430 circumstances, but probably never did.
4432 PH/04 Installed a modified version of Tony Finch's patch to make submission
4433 mode fix the return path as well as the Sender: header line, and to
4434 add a /name= option so that you can make the user's friendly name appear
4437 TF/03 Added the control = fakedefer ACL modifier.
4439 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4440 Mark Lowes for thorough testing.
4442 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4444 TK/03 Merged latest SRS patch from Miles Wilton.
4446 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4447 with the definition in sysexits.h (which is #included earlier).
4448 Fortunately, Exim does not actually use EX_OK. The code used to try to
4449 preserve the sysexits.h value, by assuming that macro definitions were
4450 scanned for macro replacements. I have been disabused of this notion,
4451 so now the code just undefines EX_OK before #including unistd.h.
4453 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4454 in the smtp transport. When a block could not be written in a single
4455 write() function, the timeout was being re-applied to each part-write.
4456 This seems wrong - if the receiver was accepting one byte at a time it
4457 would take for ever. The timeout is now adjusted when this happens. It
4458 doesn't have to be particularly precise.
4460 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4461 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4463 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4464 without a domain if the check to <postmaster@domain> fails.
4466 SC/01 Eximstats: added -xls and the ability to specify output files
4467 (patch written by Frank Heydlauf).
4469 SC/02 Eximstats: use FileHandles for outputting results.
4471 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4473 SC/04 Eximstats: fixed display of large numbers with -nvr option
4475 SC/05 Eximstats: fixed merging of reports with empty tables.
4477 SC/06 Eximstats: added the -include_original_destination flag
4479 SC/07 Eximstats: removed tabs and trailing whitespace.
4481 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4483 TK/06 MBOX spool code: Add real "From " MBOX separator line
4484 so the .eml file is really in mbox format (even though
4485 most programs do not really care). Patch from Alex Miller.
4487 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4488 The latter is generated from $received_to and is only set if the
4489 message has one envelope recipient. SA can use these headers,
4490 obviously out-of-the-box. Patch from Alex Miller.
4492 PH/08 The ${def test on a variable was returning false if the variable's
4493 value was "0", contrary to what the specification has always said!
4494 The result should be true unless the variable is empty.
4496 PH/09 The syntax error of a character other than { following "${if
4497 def:variable_name" (after optional whitespace) was not being diagnosed.
4498 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4499 accidental colon was present, for example, could give incorrect results.
4501 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4502 result is used (not including appendfile, where other changes are about
4505 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4506 This involved changing a lot of size variables from int to off_t. It
4507 should work with maildirs and everything.
4509 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4510 spamd dying while we are connected to it.
4512 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4515 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4516 function for BDB 4.3.
4518 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4520 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4521 the sources for PCRE have been re-arranged and more files are now
4524 PH/15 The code I had for printing potentially long long variables in PH/11
4525 above was not the best (it lost precision). The length of off_t variables
4526 is now inspected at build time, and an appropriate printing format (%ld
4527 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4528 to be "long long int" or "long int". This is needed for the internal
4529 formatting function string_vformat().
4531 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4532 the configuration file to be ":syslog", then the script "guesses" where
4533 the logs files are, rather than using the compiled in default. In our
4534 case the guess is not the same as the compiled default, so the script
4535 suddenly stopped working when I started to use syslog. The patch checks
4536 to see if log_file_path is "". If so, it attempts to read it from exim
4537 with no configuration file to get the compiled in version, before it
4538 falls back to the previous guessing code."
4540 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4541 implementing BATV in an Exim configuration. See NewStuff for the gory
4544 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4545 Makefile that are specific to HP-UX.
4547 PH/18 If the "use_postmaster" option was set for a recipient callout together
4548 with the "random" option, the postmaster address was used as the MAIL
4549 FROM address for the random test, but not for the subsequent recipient
4550 test. It is now used for both.
4552 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4553 patch removes a few documentation additions to RFC 3028, because the
4554 latest draft now contains them. It adds the new en;ascii-case comparator
4555 and a new error check for 8bit text in MIME parts. Comparator and
4556 require names are now matched exactly. I enabled the subaddress
4557 extension, but it is not well tested yet (read: it works for me)."
4559 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4560 rework some of the code of TK/09 above to avoid the hardwired use of
4561 "%lld" and "long long". Replaced the call to snprintf() with a call to
4564 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4565 records point to non-existent hosts", "retry timeout exceeded", and
4566 "retry time not reached for any host after a long failure period".
4568 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4569 experimental DomainKeys support:
4571 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4572 (2) On an error such as an illegally used "control", the wrong name for
4573 the control was given.
4575 These problems did NOT occur unless DomainKeys support was compiled.
4577 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4579 PH/24 Added ${if match_ip condition.
4581 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4582 databases so that it will be absolutely obvious if a crash occurs in the
4583 DB library. This is a regular occurrence (often caused by mis-matched
4586 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4587 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4588 picked up on a user's system that detects such things. There doesn't seem
4589 to be a gcc warning option for this - only an attribute that has to be
4590 put on the function's prototype. It seems that in Fedora Core 4 they have
4591 set this on a number of new functions. No doubt there will be more in due
4594 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4595 specify a transport. However, if an address that was verified by such a
4596 router was the subject of a callout, Exim crashed because it tried to
4597 read the rcpt_include_affixes from the non-existent transport. Now it
4598 just assumes that the setting of that option is false. This bug was
4599 introduced by 4.51/PH/31.
4601 PH/28 Changed -d+all to exclude +memory, because that information is very
4602 rarely of interest, but it makes the output a lot bigger. People tend to
4603 do -d+all out of habit.
4605 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4606 code in os-type was giving problems when libc.so lives in lib64, like on
4609 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4610 aren't the modern standard, and it seems that some systems' include files
4611 don't always have them. Exim was already checking for some of the newer
4612 ones like T_AAAA, and defining it itself. I've added checks for all the
4613 record types that Exim uses.
4615 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4616 not automatically generating a new one, as it is supposed to. This
4617 prevented TLS from working. If the file did exist, but contained invalid
4618 data, a new version was generated, as expected. It was only the case of a
4619 non-existent file that was broken.
4621 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4622 with a change in libdomainkeys > 0.64.
4624 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4625 from DNS. If the selector record carries the flag, it now has
4626 precedence over the domain-wide flag.
4628 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4630 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4631 the use of a port name that isn't defined in /etc/services) occurred, the
4632 message was deferred as in a normal delivery, and thus remained on the
4633 spool, instead of being failed because of the mua_wrapper setting. This
4634 is now fixed, and I tidied up some of the mua_wrapper messages at the
4637 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4638 the messages in a hash of arrays rather than using individual hashes.
4639 This is a bit cleaner and results in dramatic memory savings, albeit
4640 at a slight CPU cost.
4642 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4643 as requested by Marc Sherman.
4645 SC/10 Eximstats: added histograms for user specified patterns as requested
4648 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4650 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4651 fopen() in the content-scanning modules that did not already have it.
4657 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4658 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4660 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4662 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4664 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4665 to test Sieve filters that use "vacation".
4667 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4668 that changes the way the GnuTLS parameters are stored in the cache file.
4669 The new format can be generated externally. For backward compatibility,
4670 if the data in the cache doesn't make sense, Exim assumes it has read an
4671 old-format file, and it generates new data and writes a new file. This
4672 means that you can't go back to an older release without removing the
4675 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4676 work if there are any delivery delays because "one_time" forces the
4677 parent to be marked "delivered", so its unseen clone is never tried
4678 again. For this reason, Exim now forbids the simultaneous setting of
4681 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4682 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4683 entry if you want to know the details. The fix, however, neglected to
4684 consider the case when local delivery batching is involved. The test for
4685 "previously delivered" was not happening when checking to see if an
4686 address could be batched with a previous (undelivered) one; under
4687 certain circumstances this could lead to multiple deliveries to the same
4690 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4691 in its include files, and this causes problems building Exim.
4693 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4694 header_syntax) but Exim was just ignoring anything given after a slash.
4695 In particular, this caused confusion with an attempt to use "verify =
4696 reverse_host_lookup/defer_ok". An error is now given when options are
4697 supplied for verify items that do not have them. (Maybe reverse_host_
4698 lookup should have a defer_ok option, but that's a different point.)
4700 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4701 defined by RFC 821) to 2048, because there were problems with some AUTH
4702 commands, and RFC 1869 says the size should be increased for extended
4703 SMTP commands that take arguments.
4705 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4708 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4709 "unknown" error; now it says that the functionality isn't in the binary.
4711 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4712 an address' error message when a string expansion fails (syntax or
4713 whatever). Otherwise the password may appear in the log. Following change
4714 PH/42 below, there is no longer a chance of it appearing in a bounce
4717 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4719 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4720 of its addresses was ever tried. (Bugzilla bug #2.)
4722 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4723 the result incorrectly in the debug output. (It correctly added a newline
4724 to what was transported.)
4726 TF/01 Added $received_time.
4728 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4729 commented out examples of how to interface to a virus scanner and to
4730 SpamAssassin. Also added commented examples of av_scanner and
4731 spamd_address settings.
4733 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4734 and controls are allowed in which ACLs. There were a couple of minor
4735 errors. Some of the entries in the conditions table (which is a table of
4736 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4737 negation of where the condition IS allowed.
4739 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4741 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4742 header file does not have a version number, so I've had to invent a new
4743 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4744 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4745 radiusclient), but it was contributed by a Radius user.
4747 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4748 files or directories, for OpenSSL.
4750 PH/19 When an Exim process that is running as root has to create an Exim log
4751 file, it does so in a subprocess that runs as exim:exim so as to get the
4752 ownership right at creation (otherwise, other Exim processes might see
4753 the file with the wrong ownership). There was no test for failure of this
4754 fork() call, which would lead to the process getting stuck as it waited
4755 for a non-existent subprocess. Forks do occasionally fail when resources
4756 run out. I reviewed all the other calls to fork(); they all seem to check
4759 PH/20 When checking for unexpected SMTP input at connect time (before writing
4760 the banner), Exim was not dealing correctly with a non-positive return
4761 from the read() function. If the client had disconnected by this time,
4762 the result was a log entry for a synchronization error with an empty
4763 string after "input=" when read() returned zero. If read() returned -1
4764 (an event I could not check), uninitialized data bytes were printed.
4765 There were reports of junk text (parts of files, etc) appearing after
4768 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4770 PH/22 Added support for macro redefinition, and (re)definition in between
4771 driver and ACL definitions.
4773 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4774 forgetting to use the resulting value; it was using the unexpanded value.
4776 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4777 hadn't been configured. The fix is from Juergen Kreileder, who
4778 understands it better than I do:
4780 "Here's what I see happening with three configured cyrus_sasl
4781 authenticators configured (plain, login, cram-md5):
4783 On startup auth_cyrus_sasl_init() gets called for each of these.
4784 This means three calls to sasl_listmech() without a specified mech_list.
4785 => SASL tests which mechs of all available mechs actually work
4786 => three warnings about OTP not working
4787 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4789 With the patch, sasl_listmech() also gets called three times. But now
4790 SASL's mech_list option is set to the server_mech specified in the the
4791 authenticator. Or in other words, the answer from sasl_listmech()
4792 gets limited to just the mech you're testing for (which is different
4794 => the return list contains just 'plain' or 'login', 'cram-md5' or
4795 nothing depending on the value of ob->server_mech.
4797 I've just tested the patch: Authentication still works fine,
4798 unavailable mechs specified in the exim configuration are still
4799 caught, and the auth.log warnings about OTP are gone."
4801 PH/25 When debugging is enabled, the contents of the command line are added
4802 to the debugging output, even when log_selector=+arguments is not
4805 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4806 answer is "GNU", and only if the return is "GNU/something" is the answer
4809 PH/27 $acl_verify_message is now set immediately after the failure of a
4810 verification in an ACL, and so is available in subsequent modifiers. In
4811 particular, the message can be preserved by coding like this:
4813 warn !verify = sender
4814 set acl_m0 = $acl_verify_message
4816 Previously, $acl_verify_message was set only while expanding "message"
4817 and "log_message" when a very denied access.
4819 PH/28 Modified OS/os.c-Linux with
4821 -#ifndef OS_LOAD_AVERAGE
4822 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4824 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4825 nomenclature these days.)
4827 PH/29 Installed patch from the Sieve maintainer that adds the options
4828 sieve_useraddress and sieve_subaddress to the redirect router.
4830 PH/30 In these circumstances:
4831 . Two addresses routed to the same list of hosts;
4832 . First host does not offer TLS;
4833 . First host accepts first address;
4834 . First host gives temporary error to second address;
4835 . Second host offers TLS and a TLS session is established;
4836 . Second host accepts second address.
4837 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4838 and peerdn, if requested) that were in fact used only for the second
4841 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4842 attention to any local part prefix or suffix that was matched by the
4843 router that accepted the address. It now behaves in the same way as it
4844 does for delivery: the affixes are removed from the local part unless
4845 rcpt_include_affixes is set on the transport.
4847 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4848 timeout during the DATA phase of an incoming message.
4850 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4851 applied a patch sanctioned by the Sieve maintainer.
4853 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4854 the uid or gid is negative. A case of a negative gid caused this to be
4855 noticed. The fix allows for either to be negative.
4857 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4858 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4861 PH/36 The change PH/12 above was broken. Fixed it.
4863 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4864 the grounds that routing the same address twice would always produce the
4865 same answer. This might have been true once, but it is certainly no
4866 longer true now. Routing a child address may depend on the previous
4867 routing that produced that child. Some complicated redirection strategies
4868 went wrong when messages had multiple recipients, and made Exim's
4869 behaviour dependent on the order in which the addresses were given.
4871 I have moved the duplicate checking until after the routing is complete.
4872 Exim scans the addresses that are assigned to local and remote
4873 transports, and removes any duplicates. This means that more work will be
4874 done, as duplicates will always all be routed, but duplicates are
4875 presumably rare, so I don't expect this is of any significance.
4877 For deliveries to pipes, files, and autoreplies, the duplicate checking
4878 still happens during the routing process, since they are not going to be
4881 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4882 It corrects a timeout issue with spamd. This is Ian's comment: "The
4883 background is that sometimes spamd either never reads data from a
4884 connection it has accepted, or it never writes response data. The exiscan
4885 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4886 blindly assumes that writes won't block so it may never time out."
4888 PH/39 Allow G after quota size as well as K and M.
4890 PH/40 The value set for $authenticated_id in an authenticator may not contain
4891 binary zeroes or newlines because the value is written to log lines and
4892 to spool files. There was no check on this. Now the value is run through
4893 the string_printing() function so that such characters are converted to
4894 printable escape sequences.
4896 PH/41 $message_linecount is a new variable that contains the total number of
4897 lines in the message. Compare $body_linecount, which is the count for the
4900 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4901 bounce and delay warning messages, except in certain special cases, which
4904 (a) An SMTP error message from a remote host;
4905 (b) A message specified in a :fail: redirection;
4906 (c) A message specified in a "fail" command in a system filter;
4907 (d) A message specified in a FAIL return from the queryprogram router;
4908 (e) A message specified by the cannot_route_message router option.
4910 In these cases only, Exim does include the error details in bounce and
4911 warning messages. There are also a few cases where bland messages such
4912 as "unrouteable address" or "local delivery error" are given.
4914 PH/43 $value is now also set for the "else" part of a ${run expansion.
4916 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4917 being worked on, but at least Exim now implements the latest version to
4920 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4921 process to complete was treated as a delivery failure, a timeout while
4922 writing the message to the pipe was logged, but erroneously treated as a
4923 successful delivery. Such timeouts include transport filter timeouts. For
4924 consistency with the overall process timeout, these timeouts are now
4925 treated as errors, giving rise to delivery failures by default. However,
4926 there is now a new Boolean option for the pipe transport called
4927 timeout_defer, which, if set TRUE, converts the failures into defers for
4928 both kinds of timeout. A transport filter timeout is now identified in
4931 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4932 systems where "make" and "gmake" are different, calling "gmake" at top
4933 level broke things. I've arranged for the value of $(MAKE) to be passed
4934 from the Makefile to this script so that it can call the same version of
4938 A note about Exim versions 4.44 and 4.50
4939 ----------------------------------------
4941 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4942 changes of various kinds. As a consequence, a big documentation update was
4943 needed. This delayed the release for rather longer than seemed good, especially
4944 in the light of a couple of (minor) security issues. Therefore, the changes
4945 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4946 release. So 4.44 and 4.50 are in effect two different branches that both start
4949 I have left the 4.50 change log unchanged; it contains all the changes since
4950 4.43. The change log for 4.44 is below; many of its items are identical to
4951 those for 4.50. This seems to be the most sensible way to preserve the
4952 historical information.
4958 1. Minor wording change to the doc/README.SIEVE file.
4960 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4961 computation of the current number of files was incorrect.
4963 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4964 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4967 4. Give more explanation in the error message when the command for a transport
4968 filter fails to execute.
4970 5. There are several places where Exim runs a non-Exim command in a
4971 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4972 was being done only for the command run by the queryprogram router. It is
4973 now done for all such subprocesses. The other cases are: ${run, transport
4974 filters, and the commands run by the lmtp and pipe transports.
4976 6. Added CONFIGURE_GROUP build-time option.
4978 7. Some older OS have a limit of 256 on the maximum number of file
4979 descriptors. Exim was using setrlimit() to set 1000 as a large value
4980 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4981 systems. I've change it so that if it can't get 1000, it tries for 256.
4983 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4984 was an oversight, and furthermore, ever since the addition of extra
4985 controls (e.g. 4.43/32), the checks on when to allow different forms of
4986 "control" were broken. There should now be diagnostics for all cases when a
4987 control that does not make sense is encountered.
4989 9. Added the /retain_sender option to "control=submission".
4991 10. $recipients is now available in the predata ACL (oversight).
4993 11. Tidy the search cache before the fork to do a delivery from a message
4994 received from the command line. Otherwise the child will trigger a lookup
4995 failure and thereby defer the delivery if it tries to use (for example) a
4996 cached ldap connection that the parent has called unbind on.
4998 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4999 of $address_data from the recipient verification was clobbered by the
5000 sender verification.
5002 13. The value of address_data from a sender verification is now available in
5003 $sender_address_data in subsequent conditions in the ACL statement.
5005 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5007 15. Added a new option "connect=<time>" to callout options, to set a different
5010 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5011 was its contents. (It was OK if the option was not defined at all.)
5013 17. A "Completed" log line is now written for messages that are removed from
5014 the spool by the -Mrm option.
5016 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5017 information about exactly what failed.
5019 19. Added -dd to debug only the daemon process.
5021 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5022 handles timeouts, both on the server side and network timeouts. Renamed the
5023 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5025 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5026 It is now set to "smtps".
5028 22. $host_address is now set to the target address during the checking of
5029 ignore_target_hosts.
5031 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5032 being passed; this would have caused $sender_host_name to have been used if
5033 matching the list had actually called for a host name (not very likely,
5034 since this list is usually IP addresses). A host name is now passed as
5037 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5038 code that specifies a non-restarting handler (typically sigaction() in
5039 modern systems) in an attempt to fix a rare and obscure crash bug.
5041 25. Narrowed the window for a race in the daemon that could cause it to ignore
5042 SIGCHLD signals. This is not a major problem, because they are used only to
5043 wake it up if nothing else does.
5045 26. A malformed maildirsize file could cause Exim to calculate negative values
5046 for the mailbox size or file count. Odd effects could occur as a result.
5047 The maildirsize information is now recalculated if the size or filecount
5050 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5051 support for a long time. Removed HAVE_SYS_VFS_H.
5053 28. Installed the latest version of exipick from John Jetmore.
5055 29. In an address list, if the pattern was not a regular expression, an empty
5056 subject address (from a bounce message) matched only if the pattern was an
5057 empty string. Non-empty patterns were not even tested. This was the wrong
5058 because it is perfectly reasonable to use an empty address as part of a
5059 database query. An empty address is now tested by patterns that are
5060 lookups. However, all the other forms of pattern expect the subject to
5061 contain a local part and a domain, and therefore, for them, an empty
5062 address still always fails if the pattern is not itself empty.
5064 30. Exim went into a mad DNS loop when attempting to do a callout where the
5065 host was specified on an smtp transport, and looking it up yielded more
5066 than one IP address.
5068 31. Re-factored the code for checking spool and log partition space into a
5069 function that finds that data and another that does the check. The former
5070 is then used to implement four new variables: $spool_space, $log_space,
5071 $spool_inodes, and $log_inodes.
5073 32. The RFC2047 encoding function was originally intended for short strings
5074 such as real names; it was not keeping to the 75-character limit for
5075 encoded words that the RFC imposes. It now respects the limit, and
5076 generates multiple encoded words if necessary. To be on the safe side, I
5077 have increased the buffer size for the ${rfc2047: expansion operator from
5080 33. It is now permitted to omit both strings after an "if" condition; if the
5081 condition is true, the result is "true". As before, when the second string
5082 is omitted, a false condition yields an empty string. This makes it less
5083 cumbersome to write custom ACL and router conditions.
5085 34. Failure to deliver a bounce message always caused it to be frozen, even if
5086 there was an errors_to setting on the router. The errors_to setting is now
5089 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5090 canonical form (fully expanded) before being placed in
5091 $sender_host_address.
5093 36. The table in the code that translates DNS record types into text (T_A to
5094 "A" for instance) was missing entries for NS and CNAME. It is just possible
5095 that this could have caused confusion if both these types were looked up
5096 for the same domain, because the text type is used as part of Exim's
5097 per-process caching. But the chance of anyone hitting this buglet seems
5100 37. The dnsdb lookup has been extended in a number of ways.
5102 (1) There is a new type, "zns", which walks up the domain tree until it
5103 finds some nameserver records. It should be used with care.
5105 (2) There is a new type, "mxh", which is like "mx" except that it returns
5106 just the host names, not the priorities.
5108 (3) It is now possible to give a list of domains (or IP addresses) to be
5109 looked up. The behaviour when one of the lookups defers can be
5110 controlled by a keyword.
5112 (4) It is now possible to specify the separator character for use when
5113 multiple records are returned.
5115 38. The dnslists ACL condition has been extended: it is now possible to supply
5116 a list of IP addresses and/or domains to be looked up in a particular DNS
5119 39. Added log_selector=+queue_time_overall.
5121 40. When running the queue in the test harness, wait just a tad after forking a
5122 delivery process, to get repeatability of debugging output.
5124 41. Include certificate and key file names in error message when GnuTLS fails
5125 to set them up, because the GnuTLS error message doesn't include the name
5126 of the failing file when there is a problem reading it.
5128 42. Allow both -bf and -bF in the same test run.
5130 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5132 44. The "Exiscan patch" is now merged into the mainline Exim source.
5134 45. Sometimes the final signoff response after QUIT could fail to get
5135 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5136 < 0 before doing a fflush(). This bug looks as though it goes back to the
5137 introduction of TLS in release 3.20, but "sometimes" must have been rare
5138 because the tests only now provoked it.
5140 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5141 (this can affect the format of dates).
5143 47. exim_tidydb, when checking for the continued existence of a message for
5144 which it has found a message-specific retry record, was not finding
5145 messages that were in split spool directories. Consequently, it was
5146 deleting retry records that should have stayed in existence.
5148 48. Steve fixed some bugs in eximstats.
5150 49. The SPA authentication driver was not abandoning authentication and moving
5151 on to the next authenticator when an expansion was forced to fail,
5152 contradicting the general specification for all authenticators. Instead it
5153 was generating a temporary error. It now behaves as specified.
5155 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5156 (the order specifies the preference for clients). The order is now AES256,
5157 AES128, 3DES, ARCFOUR128.
5159 51. Small patch to Sieve code - explicitly set From: when generating an
5162 52. Exim crashed if a remote delivery caused a very long error message to be
5163 recorded - for instance if somebody sent an entire SpamAssassin report back
5164 as a large number of 550 error lines. This bug was coincidentally fixed by
5165 increasing the size of one of Exim's internal buffers (big_buffer) that
5166 happened as part of the Exiscan merge. However, to be on the safe side, I
5167 have made the code more robust (and fixed the comments that describe what
5170 53. Now that there can be additional text after "Completed" in log lines (if
5171 the queue_time_overall log selector is set), a one-byte patch to exigrep
5172 was needed to allow it to recognize "Completed" as not the last thing in
5175 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5176 patch that reportedly fixes this has been added. I am not expert enough to
5177 create a test for it. This is what the patch creator wrote:
5179 "I found a little strange behaviour of ldap code when working with
5180 Windows 2003 AD Domain, where users was placed in more than one
5181 Organization Units. When I tried to give exim partial DN, the exit code
5182 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5183 But simultaneously result of request was absolutely normal ldap result,
5184 so I produce this patch..."
5186 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5187 REFERENCE, so I have modified the code to exclude the patch when that macro
5190 55. Some experimental protocols are using DNS PTR records for new purposes. The
5191 keys for these records are domain names, not reversed IP addresses. The
5192 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5193 leaves it alone. Component reversal etc. now happens only for IP addresses.
5196 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5198 57. Double the size of the debug message buffer (to 2048) so that more of very
5199 long debug lines gets shown.
5201 58. The exicyclog utility now does better if the number of log files to keep
5202 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5204 59. Two changes related to the smtp_active_hostname option:
5206 (1) $smtp_active_hostname is now available as a variable.
5207 (2) The default for smtp_banner uses $smtp_active_hostname instead
5208 of $primary_hostname.
5210 60. The host_aton() function is supposed to be passed a string that is known
5211 to be a valid IP address. However, in the case of IPv6 addresses, it was
5212 not checking this. This is a hostage to fortune. Exim now panics and dies
5213 if the condition is not met. A case was found where this could be provoked
5214 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5215 components; fortuitously, this particular loophole had already been fixed
5216 by change 4.50/55 above.
5218 If there are any other similar loopholes, the new check in host_aton()
5219 itself should stop them being exploited. The report I received stated that
5220 data on the command line could provoke the exploit when Exim was running as
5221 exim, but did not say which command line option was involved. All I could
5222 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5223 running as the user.
5226 61. There was a buffer overflow vulnerability in the SPA authentication code
5227 (which came originally from the Samba project). I have added a test to the
5228 spa_base64_to_bits() function which I hope fixes it.
5231 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5232 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5234 63. The daemon start-up calls getloadavg() while still root for those OS that
5235 need the first call to be done as root, but it missed one case: when
5236 deliver_queue_load_max is set with deliver_drop_privilege. This is
5237 necessary for the benefit of the queue runner, because there is no re-exec
5238 when deliver_drop_privilege is set.
5240 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5241 This has been fixed.
5243 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5244 was in use, was not putting the data itself into the right store pool;
5245 consequently, it could be overwritten for a subsequent message in the same
5246 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5249 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5251 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5252 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5253 the function were treating the return as a boolean value, which happened to
5254 work because 0=false and not-0=true, but is not correct code.
5256 68. The host_aton() function was not handling scoped IPv6 addresses (those
5257 with, for example, "%eth0" on the end) correctly.
5259 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5260 negated items (that is, ~something) in unsigned ints. Some compilers
5261 apparently mutter when there is no cast.
5263 70. If an address verification called from an ACL failed, and did not produce a
5264 user-specific message (i.e. there was only a "system" message), nothing was
5265 put in $acl_verify_message. In this situation, it now puts the system
5268 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5269 session; change 4.31/43 added the unwanted input to the log line - except
5270 that it did not do this in the start of session case. It now does.
5272 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5273 This is wrong and can cause the other end to generate a synchronization
5274 error if it is another Exim or anything else that does the synchronization
5275 check. A QUIT command is no longer sent after a timeout.
5277 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5278 during host lookups.
5280 74. The defer_ok option of callout verification was not working if it was used
5281 when verifying addresses in header lines, that is, for this case:
5283 verify = header_sender/callout=defer_ok
5285 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5286 those file descriptors could be used for SMTP connections. If anything
5287 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5288 could be sent to the SMTP client, causing chaos. The daemon now opens
5289 stdin, stdout, and stderr to /dev/null when it puts itself into the
5292 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5293 log by default. The user can override this with suitable Perl magic.
5295 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5296 the log message when discard triggers, was not working for the DATA ACL or
5297 for the non-SMTP ACL.
5299 78. Error message wording change in sieve.c.
5301 79. If smtp_accept_max_per_host was set, the number of connections could be
5302 restricted to fewer than expected, because the daemon was trying to set up
5303 a new connection before checking whether the processes handling previous
5304 connections had finished. The check for completed processes is now done
5305 earlier. On busy systems, this bug wouldn't be noticed because something
5306 else would have woken the daemon, and it would have reaped the completed
5309 80. If a message was submitted locally by a user whose login name contained one
5310 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5311 It caused a spool format error. I have fixed the spool reading code. A
5312 related problem was that the "from" clause in the Received: line became
5313 illegal because of the space(s). It is now covered by ${quote_local_part.
5315 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5318 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5320 83. Patch from Sieve maintainer to fix unterminated string problem in
5321 "vacation" handling.
5323 84. Some minor changes to the Linux configuration files to help with other
5324 OS variants using glibc.
5326 85. One more patch for Sieve to update vacation handling to latest spec.
5329 ----------------------------------------------------
5330 See the note above about the 4.44 and 4.50 releases.
5331 ----------------------------------------------------
5337 1. Change 4.43/35 introduced a bug that caused file counts to be
5338 incorrectly computed when quota_filecount was set in an appendfile
5341 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5342 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5345 3. Give more explanation in the error message when the command for a transport
5346 filter fails to execute.
5348 4. There are several places where Exim runs a non-Exim command in a
5349 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5350 was being done only for the command run by the queryprogram router. It is
5351 now done for all such subprocesses. The other cases are: ${run, transport
5352 filters, and the commands run by the lmtp and pipe transports.
5354 5. Some older OS have a limit of 256 on the maximum number of file
5355 descriptors. Exim was using setrlimit() to set 1000 as a large value
5356 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5357 systems. I've change it so that if it can't get 1000, it tries for 256.
5359 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5360 was an oversight, and furthermore, ever since the addition of extra
5361 controls (e.g. 4.43/32), the checks on when to allow different forms of
5362 "control" were broken. There should now be diagnostics for all cases when a
5363 control that does not make sense is encountered.
5365 7. $recipients is now available in the predata ACL (oversight).
5367 8. Tidy the search cache before the fork to do a delivery from a message
5368 received from the command line. Otherwise the child will trigger a lookup
5369 failure and thereby defer the delivery if it tries to use (for example) a
5370 cached ldap connection that the parent has called unbind on.
5372 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5373 of $address_data from the recipient verification was clobbered by the
5374 sender verification.
5376 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5377 was its contents. (It was OK if the option was not defined at all.)
5379 11. A "Completed" log line is now written for messages that are removed from
5380 the spool by the -Mrm option.
5382 12. $host_address is now set to the target address during the checking of
5383 ignore_target_hosts.
5385 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5386 being passed; this would have caused $sender_host_name to have been used if
5387 matching the list had actually called for a host name (not very likely,
5388 since this list is usually IP addresses). A host name is now passed as
5391 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5392 code that specifies a non-restarting handler (typically sigaction() in
5393 modern systems) in an attempt to fix a rare and obscure crash bug.
5395 15. Narrowed the window for a race in the daemon that could cause it to ignore
5396 SIGCHLD signals. This is not a major problem, because they are used only to
5397 wake it up if nothing else does.
5399 16. A malformed maildirsize file could cause Exim to calculate negative values
5400 for the mailbox size or file count. Odd effects could occur as a result.
5401 The maildirsize information is now recalculated if the size or filecount
5404 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5405 support for a long time. Removed HAVE_SYS_VFS_H.
5407 18. Updated exipick to current release from John Jetmore.
5409 19. Allow an empty sender to be matched against a lookup in an address list.
5410 Previously the only cases considered were a regular expression, or an
5413 20. Exim went into a mad DNS lookup loop when doing a callout where the
5414 host was specified on the transport, if the DNS lookup yielded more than
5417 21. The RFC2047 encoding function was originally intended for short strings
5418 such as real names; it was not keeping to the 75-character limit for
5419 encoded words that the RFC imposes. It now respects the limit, and
5420 generates multiple encoded words if necessary. To be on the safe side, I
5421 have increased the buffer size for the ${rfc2047: expansion operator from
5424 22. Failure to deliver a bounce message always caused it to be frozen, even if
5425 there was an errors_to setting on the router. The errors_to setting is now
5428 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5429 canonical form (fully expanded) before being placed in
5430 $sender_host_address.
5432 24. Updated eximstats to version 1.33
5434 25. Include certificate and key file names in error message when GnuTLS fails
5435 to set them up, because the GnuTLS error message doesn't include the name
5436 of the failing file when there is a problem reading it.
5438 26. Expand error message when OpenSSL has problems setting up cert/key files.
5441 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5442 (this can affect the format of dates).
5444 28. exim_tidydb, when checking for the continued existence of a message for
5445 which it has found a message-specific retry record, was not finding
5446 messages that were in split spool directories. Consequently, it was
5447 deleting retry records that should have stayed in existence.
5449 29. eximstats updated to version 1.35
5450 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5451 1.35 - bugfix such that pie charts by volume are generated correctly
5453 30. The SPA authentication driver was not abandoning authentication and moving
5454 on to the next authenticator when an expansion was forced to fail,
5455 contradicting the general specification for all authenticators. Instead it
5456 was generating a temporary error. It now behaves as specified.
5458 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5459 (the order specifies the preference for clients). The order is now AES256,
5460 AES128, 3DES, ARCFOUR128.
5462 31. Small patch to Sieve code - explicitly set From: when generating an
5465 32. Exim crashed if a remote delivery caused a very long error message to be
5466 recorded - for instance if somebody sent an entire SpamAssassin report back
5467 as a large number of 550 error lines. This bug was coincidentally fixed by
5468 increasing the size of one of Exim's internal buffers (big_buffer) that
5469 happened as part of the Exiscan merge. However, to be on the safe side, I
5470 have made the code more robust (and fixed the comments that describe what
5473 33. Some experimental protocols are using DNS PTR records for new purposes. The
5474 keys for these records are domain names, not reversed IP addresses. The
5475 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5476 leaves it alone. Component reversal etc. now happens only for IP addresses.
5479 34. The host_aton() function is supposed to be passed a string that is known
5480 to be a valid IP address. However, in the case of IPv6 addresses, it was
5481 not checking this. This is a hostage to fortune. Exim now panics and dies
5482 if the condition is not met. A case was found where this could be provoked
5483 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5484 components; fortuitously, this particular loophole had already been fixed
5485 by change 4.50/55 or 4.44/33 above.
5487 If there are any other similar loopholes, the new check in host_aton()
5488 itself should stop them being exploited. The report I received stated that
5489 data on the command line could provoke the exploit when Exim was running as
5490 exim, but did not say which command line option was involved. All I could
5491 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5492 running as the user.
5495 35. There was a buffer overflow vulnerability in the SPA authentication code
5496 (which came originally from the Samba project). I have added a test to the
5497 spa_base64_to_bits() function which I hope fixes it.
5500 36. The daemon start-up calls getloadavg() while still root for those OS that
5501 need the first call to be done as root, but it missed one case: when
5502 deliver_queue_load_max is set with deliver_drop_privilege. This is
5503 necessary for the benefit of the queue runner, because there is no re-exec
5504 when deliver_drop_privilege is set.
5506 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5507 was in use, was not putting the data itself into the right store pool;
5508 consequently, it could be overwritten for a subsequent message in the same
5509 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5512 38. Sometimes the final signoff response after QUIT could fail to get
5513 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5514 < 0 before doing a fflush(). This bug looks as though it goes back to the
5515 introduction of TLS in release 3.20, but "sometimes" must have been rare
5516 because the tests only now provoked it.
5522 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5523 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5524 Now it returns an integer. A number of calls were still expecting a T/F
5525 return. Fortuitously, in all cases, the tests worked in OK situations,
5526 which is the norm. However, things would have gone wrong on any write
5527 failures on the smtp file descriptor. This function is used when sending
5528 messages over SMTP and also when doing verify callouts.
5530 2. When Exim is called to do synchronous delivery of a locally submitted
5531 message (the -odf or -odi options), it no longer closes stderr before doing
5534 3. Implemented the mua_wrapper option.
5536 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5538 5. Implemented the functions header_remove(), header_testname(),
5539 header_add_at_position(), and receive_remove_recipient(), and exported them
5542 6. If an ACL "warn" statement specified the addition of headers, Exim already
5543 inserted X-ACL-Warn: at the start if there was no header name. However, it
5544 was not making this test for the second and subsequent header lines if
5545 there were newlines in the string. This meant that an invalid header could
5546 be inserted if Exim was badly configured.
5548 7. Allow an ACL "warn" statement to add header lines at the start or after all
5549 the Received: headers, as well as at the end.
5551 8. Added the rcpt_4xx retry error code.
5553 9. Added postmaster_mailfrom=xxx to callout verification option.
5555 10. Added mailfrom=xxxx to the callout verification option, for verify=
5558 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5559 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5561 12. Inserted some casts to stop certain compilers warning when using pointer
5562 differences as field lengths or precisions in printf-type calls (mostly
5563 affecting debugging statements).
5565 13. Added optional readline() support for -be (dynamically loaded).
5567 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5568 same clock tick as a message's arrival, so that its received time was the
5569 same as the "first fail" time on the retry record, and that message
5570 remained on the queue past the ultimate address timeout, every queue runner
5571 would try a delivery (because it was past the ultimate address timeout) but
5572 after another failure, the ultimate address timeout, which should have then
5573 bounced the address, did not kick in. This was a "< instead of <=" error;
5574 in most cases the first failure would have been in the next clock tick
5575 after the received time, and all would be well.
5577 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5578 being recognized when the domain list was tested by the match_domain
5579 condition in an expansion string.
5581 16. Added the ${str2b64: operator.
5583 17. Exim was always calling setrlimit() to set a large limit for the number of
5584 processes, without checking whether the existing limit was already
5585 adequate. (It did check for the limit on file descriptors.) Furthermore,
5586 errors from getrlimit() and setrlimit() were being ignored. Now they are
5587 logged to the main and panic logs, but Exim does carry on, to try to do its
5588 job under whatever limits there are.
5590 18. Imported PCRE 5.0.
5592 19. Trivial typo in log message " temporarily refused connection" (the leading
5595 20. If the log selector return_path_on_delivery was set and an address was
5596 redirected to /dev/null, the delivery process crashed because it assumed
5597 that a return path would always be set for a "successful" delivery. In this
5598 case, the whole delivery is bypassed as an optimization, and therefore no
5601 21. Internal re-arrangement: the function for sending a challenge and reading
5602 a response while authentication was assuming a zero-terminated challenge
5603 string. It's now changed to take a pointer and a length, to allow for
5604 binary data in such strings.
5606 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5608 23. Exim was not respecting finduser_retries when seeking the login of the
5609 uid under which it was called; it was always trying 10 times. (The default
5610 setting of finduser_retries is zero.) Also, it was sleeping after the final
5611 failure, which is pointless.
5613 24. Implemented tls_on_connect_ports.
5615 25. Implemented acl_smtp_predata.
5617 26. If the domain in control=submission is set empty, Exim assumes that the
5618 authenticated id is a complete email address when it generates From: or
5619 Sender: header lines.
5621 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5622 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5623 chown and chgrp in /bin and hostname in /usr/bin.
5625 28. Exim was keeping the "process log" file open after each use, just as it
5626 does for the main log. This opens the possibility of it remaining open for
5627 long periods when the USR1 signal hits a daemon. Occasional processlog
5628 errors were reported, that could have been caused by this. Anyway, it seems
5629 much more sensible not to leave this file open at all, so that is what now
5632 29. The long-running daemon process does not normally write to the log once it
5633 has entered its main loop, and it closes the log before doing so. This is
5634 so that log files can straightforwardly be renamed and moved. However,
5635 there are a couple of unusual error situations where the daemon does write
5636 log entries, and I had neglected to close the log afterwards.
5638 30. The text of an SMTP error response that was received during a remote
5639 delivery was being truncated at 512 bytes. This is too short for some of
5640 the long messages that one sometimes sees. I've increased the limit to
5643 31. It is now possible to make retry rules that apply only when a message has a
5644 specific sender, in particular, an empty sender.
5646 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5647 it possible to be selective about when SMTP synchronization is enforced.
5649 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5651 32. Implemented hosts_connection_nolog.
5653 33. Added an ACL for QUIT.
5655 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5658 35. Added mailbox_size and mailbox_filecount to appendfile.
5660 36. Added control = no_multiline_responses to ACLs.
5662 37. There was a bug in the logic of the code that waits for the clock to tick
5663 in the case where the clock went backwards by a substantial amount such
5664 that the microsecond fraction of "now" was more than the microsecond
5665 fraction of "then" (but the whole seconds number was less).
5667 38. Added support for the libradius Radius client library this is found on
5668 FreeBSD (previously only the radiusclient library was supported).
5674 1. When certain lookups returned multiple values in the form name=value, the
5675 quoting of the values was not always being done properly. Specifically:
5676 (a) If the value started with a double quote, but contained no whitespace,
5678 (b) If the value contained whitespace other than a space character (i.e.
5679 tabs or newlines or carriage returns) it was not quoted.
5680 This fix has been applied to the mysql and pgsql lookups by writing a
5681 separate quoting function and calling it from the lookup code. The fix
5682 should probably also be applied to nisplus, ibase and oracle lookups, but
5683 since I cannot test any of those, I have not disturbed their existing code.
5685 2. A hit in the callout cache for a specific address caused a log line with no
5686 reason for rejecting RCPT. Now it says "Previous (cached) callout
5687 verification failure".
5689 3. There was an off-by-one bug in the queryprogram router. An over-long
5690 return line was truncated at 256 instead of 255 characters, thereby
5691 overflowing its buffer with the terminating zero. As well as fixing this, I
5692 have increased the buffer size to 1024 (and made a note to document this).
5694 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5695 when Exim is waiting for an SMTP response from a remote server, Exim
5696 restarts its select() call on the socket, thereby resetting its timeout.
5697 This is not a problem when such interrupts are rare. Somebody set up a cron
5698 job to run exiwhat every 2 minutes, which is less than the normal select()
5699 timeout (5 or 10 minutes). This meant that the select() timeout never
5700 kicked in because it was always reset. I have fixed this by comparing the
5701 time when an interrupt arrives with the time at the start of the first call
5702 to select(). If more time than the timeout has elapsed, the interrupt is
5703 treated as a timeout.
5705 5. Some internal re-factoring in preparation for the addition of Sieve
5706 extensions (by MH). In particular, the "personal" test is moved to a
5707 separate function, and given an option for scanning Cc: and Bcc: (which is
5708 not set for Exim filters).
5710 6. When Exim created an email address using the login of the caller as the
5711 local part (e.g. when creating a From: or Sender: header line), it was not
5712 quoting the local part when it contained special characters such as @.
5714 7. Installed new OpenBSD configuration files.
5716 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5717 try to make them clearer.
5719 9. Callout options, other than the timeout value, were being ignored when
5720 verifying sender addresses in header lines. For example, when using
5722 verify = header_sender/callout=no_cache
5724 the cache was (incorrectly) being used.
5726 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5727 only the Cygwin environment.
5729 11. When return_path_on_delivery was set as a log selector, if different remote
5730 addresses in the same message used different return paths and parallel
5731 remote delivery occurred, the wrong values would sometimes be logged.
5732 (Whenever a remote delivery process finished, the return path value from
5733 the most recently started remote delivery process was logged.)
5735 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5736 lines when AUTH and/or TLS are in use. This is the "received protocol"
5737 field. Exim used to use "asmtp" for authenticated SMTP, without any
5738 indication (in the protocol name) for TLS use. Now it follows the RFC and
5739 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5740 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5741 names appear in log lines as well as in Received: header lines.
5743 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5744 extensions, and comparison tests, and to fix some bugs.
5746 14. Changes to the "personal" filter test:
5748 (1) The test was buggy in that it was just doing the equivalent of
5749 "contains" tests on header lines. For example, if a user's address was
5750 anne@some.where, the "personal" test would incorrectly be true for
5752 To: susanne@some.where
5754 This test is now done by extracting each address from the header in turn,
5755 and checking the entire address. Other tests that are part of "personal"
5756 are now done using regular expressions (for example, to check local parts
5757 of addresses in From: header lines).
5759 (2) The list of non-personal local parts in From: addresses has been
5760 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5761 taken from the Sieve specification recommendations.
5763 (3) If the message contains any header line starting with "List-" it is
5764 treated as non-personal.
5766 (4) The test for "circular" in the Subject: header line has been removed
5767 because it now seems ill-conceived.
5769 15. Minor typos in src/EDITME comments corrected.
5771 16. Installed latest exipick from John Jetmore.
5773 17. If headers_add on a router specified a text string that was too long for
5774 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5775 of string_sprintf() is now avoided.
5777 18. $message_body_size was not set (it was always zero) when running the DATA
5778 ACL and the local_scan() function.
5780 19. For the "mail" command in an Exim filter, no default was being set for
5781 the once_repeat time, causing a random time value to be used if "once" was
5782 specified. (If the value happened to be <= 0, no repeat happened.) The
5783 default is now 0s, meaning "never repeat". The "vacation" command was OK
5784 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5785 (I found it when inspecting the code).
5787 20. There is now an overall timeout for performing a callout verification. It
5788 defaults to 4 times the callout timeout, which applies to individual SMTP
5789 commands during the callout. The overall timeout applies when there is more
5790 than one host that can be tried. The timeout is checked before trying the
5791 next host. This prevents very long delays if there are a large number of
5792 hosts and all are timing out (e.g. when the network connections are timing
5793 out). The value of the overall timeout can be changed by specifying an
5794 additional sub-option for "callout", called "maxwait". For example:
5796 verify = sender/callout=5s,maxwait=20s
5798 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5799 to the end before writing, but this should make it even safer).
5801 22. Exim was forgetting that it had advertised PIPELINING for the second and
5802 subsequent messages on an SMTP connection. It was also not resetting its
5803 memory on STARTTLS and an internal HELO.
5805 23. When Exim logs an SMTP synchronization error within a session, it now
5806 records whether PIPELINING has been advertised or not.
5808 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5809 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5810 rather than long int.
5812 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5814 26. Added the never_mail option to autoreply.
5820 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5821 crash if the getsockname() call failed; this can happen if a connection is
5822 closed very soon after it is established. The problem was simply in the
5823 order in which certain operations were done, causing Exim to try to write
5824 to the SMTP stream before it had set up the file descriptor. The bug has
5825 been fixed by making things happen in the correct order.
5831 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5832 before the connection was closed, thus losing the rejection response.
5834 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5835 some early Solaris releases, but causes trouble in current releases where
5836 socklen_t is defined.
5838 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5841 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5844 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5845 that releasing the top of it at the end releases what was used for sub-
5846 expansions (unless the block got too big). However, discard this block if
5847 the first thing is a variable or header, so that we can use its block when
5848 it is dynamic (useful for very large $message_headers, for example).
5850 6. Lookups now cache *every* query, not just the most recent. A new, separate
5851 store pool is used for this. It can be recovered when all lookup caches are
5852 flushed. Lookups now release memory at the end of their result strings.
5853 This has involved some general refactoring of the lookup sources.
5855 7. Some code has been added to the store_xxx() functions to reduce the amount
5856 of flapping under certain conditions.
5858 8. log_incoming_interface used to affect only the <= reception log lines. Now
5859 it causes the local interface and port to be added to several more SMTP log
5860 lines, for example "SMTP connection from", and rejection lines.
5862 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5864 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5866 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5867 could be overwritten at the end of the current message (or the start of a
5868 new message if it was set in a HELO ACL). The value is now preserved for
5869 the duration of the SMTP connection.
5871 12. If a transport had a headers_rewrite setting, and a matching header line
5872 contained an unqualified address, that address was qualified, even if it
5873 did not match any rewriting rules. The underlying bug was that the values
5874 of the flags that permit the existence of unqualified sender and recipient
5875 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5876 non-local messages, and by -bnq for local messages) were not being
5877 preserved with the message after it was received.
5879 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5880 "next input=" as part of the text comprising the host identity instead of
5881 the correct text. The code was using the same buffer for two different
5882 strings. However, depending on which order the printing function evaluated
5883 its arguments, the bug did not always show up. Under Linux, for example, my
5884 test suite worked just fine.
5886 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5887 doesn't work with some older versions of Perl. It has been changed to "my",
5888 which in any case is probably the better facility to use.
5890 15. A really picky compiler found some instances of statements for creating
5891 error messages that either had too many or two few arguments for the format
5894 16. The size of the buffer for calls to the DNS resolver has been increased
5895 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5896 for addresses that have a lot of PTR records. This alleviates a problem; it
5897 does not fully solve it.
5899 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5900 buffer now truncates the list and logs the incident, which is the same
5901 action as happens when Exim is looking up a host name and its aliases.
5902 Previously in this situation something unpredictable would happen;
5903 sometimes it was "internal error: store_reset failed".
5905 18. If a server dropped the connection unexpectedly when an Exim client was
5906 using GnuTLS and trying to read a response, the client delivery process
5907 crashed while trying to generate an error log message.
5909 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5910 string, for example:
5912 warn message = H1: something\nH2: something
5914 the text was added as a single header line from Exim's point of view
5915 though it ended up OK in the delivered message. However, searching for the
5916 second and subsequent header lines using $h_h2: did not work. This has been
5917 fixed. Similarly, if a system filter added multiple headers in this way,
5918 the routers could not see them.
5920 20. Expanded the error message when iplsearch is called with an invalid key to
5921 suggest using net-iplsearch in a host list.
5923 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5924 ACLs are no longer actually imposed (and a message to that effect is
5927 22. If a "gecos" field in a passwd entry contained escaped characters, in
5928 particular, if it contained a \" sequence, Exim got it wrong when building
5929 a From: or a Sender: header from that name. A second bug also caused
5930 incorrect handling when an unquoted " was present following a character
5931 that needed quoting.
5933 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5934 was not being matched caselessly.
5936 24. Arranged for all hyphens in the exim.8 source to be escaped with
5939 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5940 properly. Recipient callout cache records were still being keyed to include
5941 the sender, even when use_sender was set false. This led to far more
5942 callouts that were necessary. The sender is no longer included in the key
5943 when use_sender is false.
5945 26. Added "control = submission" modifier to ACLs.
5947 27. Added the ${base62d: operator to decode base 62 numbers.
5949 28. dnsdb lookups can now access SRV records.
5951 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5952 the configuration file.
5954 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5955 (-v) mode. This makes the output for a verbose queue run more intelligible.
5957 31. Added a use_postmaster feature to recipient callouts.
5959 32. Added the $body_zerocount variable, containing the number of binary zero
5960 bytes in the message body.
5962 33. The time of last modification of the "new" subdirectory is now used as the
5963 "mailbox time last read" when there is a quota error for a maildir
5966 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5968 35. Added +ignore_unknown as a special item in host lists.
5970 36. Code for decoding IPv6 addresses in host lists is now included, even if
5971 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5972 address was recognized as an IP address, but was then not correctly decoded
5973 into binary, causing unexpected and incorrect effects when compared with
5980 1. Very minor rewording of debugging text in manualroute to say "list of
5981 hosts" instead of "hostlist".
5983 2. If verify=header_syntax was set, and a header line with an unqualified
5984 address (no domain) and a large number of spaces between the end of the
5985 name and the colon was received, the reception process suffered a buffer
5986 overflow, and (when I tested it) crashed. This was caused by some obsolete
5987 code that should have been removed. The fix is to remove it!
5989 3. When running in the test harness, delay a bit after writing a bounce
5990 message to get a bit more predictability in the log output.
5992 4. Added a call to search_tidyup() just before forking a reception process. In
5993 theory, someone could use a lookup in the expansion of smtp_accept_max_
5994 per_host which, without the tidyup, could leave open a database connection.
5996 5. Added the variables $recipient_data and $sender_data which get set from a
5997 lookup success in an ACL "recipients" or "senders" condition, or a router
5998 "senders" option, similar to $domain_data and $local_part_data.
6000 6. Moved the writing of debug_print from before to after the "senders" test
6003 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6004 problems for message scanning, either using a data ACL, or using
6005 local_scan() because the Received: header was not generated till after they
6006 were called (in order to set the time as the time of reception completion).
6007 I have revised the way this works. The header is now generated after the
6008 body is received, but before the ACL or local_scan() are called. After they
6009 are run, the timestamp in the header is updated.
6015 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6016 before starting a queue runner without re-exec. This happened only when
6017 deliver_drop_privilege was set or when the Exim user was set to root. The
6018 effect of the bug was that timeouts during subsequent deliveries caused
6019 crashes instead of being properly handled. The handler is now left at its
6020 default (and expected) setting.
6022 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6023 message, again when deliver_drop_privilege is set or Exim is run as root.
6024 The bug described in (1) was not present in this case, but the tidying up
6025 of the other signals was missing. I have made the two cases consistent.
6027 3. The ignore_target_hosts setting on a manualroute router was being ignored
6028 for hosts that were looked up using the /MX notation.
6030 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6033 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6034 operated on the sender address. After changing the $sender_address to <>
6035 for the sender address verify, Exim was re-instated it as the original
6036 (before rewriting) address, but remembering that it had rewritten it, so it
6037 wasn't rewriting it again. This bug also had the effect of breaking the
6038 sender address verification caching when the sender address was rewritten.
6040 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6041 This has been changed so that if the ip literal address matches
6042 ignore_target_hosts, the router declines.
6044 7. Added expansion conditions match_domain, match_address, and match_local_
6045 part (NOT match_host).
6047 8. The placeholder for the Received: header didn't have a length field set.
6049 9. Added code to Exim itself and to exim_lock to test for a specific race
6050 condition that could lead to file corruption when using MBX delivery. The
6051 issue is with the lockfile that is created in /tmp. If this file is removed
6052 after a process has opened it but before that process has acquired a lock,
6053 there is the potential for a second process to recreate the file and also
6054 acquire a lock. This could lead to two Exim processes writing to the file
6055 at the same time. The added code performs the same test as UW imapd; it
6056 checks after acquiring the lock that its file descriptor still refers to
6057 the same named file.
6059 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6060 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6063 11. Added the smtp_active_hostname option. If used, this will typically be made
6064 to depend on the incoming interface address. Because $interface_address is
6065 not set up until the daemon has forked a reception process, error responses
6066 that can happen earlier (such as "too many connections") no longer contain
6069 12. If an expansion in a condition on a "warn" statement fails because a lookup
6070 defers, the "warn" statement is abandoned, and the next ACL statement is
6071 processed. Previously this caused the whole ACL to be aborted.
6073 13. Added the iplsearch lookup type.
6075 14. Added ident_timeout as a log selector.
6077 15. Added tls_certificate_verified as a log selector.
6079 16. Added a global option tls_require_ciphers (compare the smtp transport
6080 option of the same name). This controls incoming TLS connections.
6082 17. I finally figured out how to make tls_require_ciphers do a similar thing
6083 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6084 before starting the TLS session.
6086 18. Tabs are now shown as \t in -bP output.
6088 19. If the log selector return_path_on_delivery was set, Exim crashed when
6089 bouncing a message because it had too many Received: header lines.
6091 20. If two routers both had headers_remove settings, and the first one included
6092 a superfluous trailing colon, the final name in the first list and the
6093 first name in the second list were incorrectly joined into one item (with a
6094 colon in the middle).
6100 1. Added -C and -D options to the exinext utility, mainly to make it easier
6101 to include in the automated testing, but these could be helpful when
6102 multiple configurations are in use.
6104 2. The exinext utility was not formatting the output nicely when there was
6105 an alternate port involved in the retry record key, nor when there was a
6106 message id as well (for retries that were specific to a specific message
6107 and a specific host). It was also confused by IPv6 addresses, because of
6108 the additional colons they contain. I have fixed the IPv4 problem, and
6109 patched it up to do a reasonable job for IPv6.
6111 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6112 delivery, the log line now contains "pipelined" if PIPELINING was used.
6114 4. An SMTP transport process used to panic and die if the bind() call to set
6115 an explicit outgoing interface failed. This has been changed; it is now
6116 treated in the same way as a connect() failure.
6118 5. A reference to $sender_host_name in the part of a conditional expansion
6119 that was being skipped was still causing a DNS lookup. This no longer
6122 6. The def: expansion condition was not recognizing references to header lines
6123 that used bh_ and bheader_.
6125 7. Added the _cache feature to named lists.
6127 8. The code for checking quota_filecount in the appendfile transport was
6128 allowing one more file than it should have been.
6130 9. For compatibility with Sendmail, the command line option
6138 and sets the incoming protocol and host name (for trusted callers). The
6139 host name and its colon can be omitted when only the protocol is to be set.
6140 Note the Exim already has two private options, -pd and -ps, that refer to
6141 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6142 "s", but I don't think that's a major issue.
6144 10. A number of refactoring changes to the code, none of which should affect
6147 (a) The number of logging options was getting close to filling up the
6148 32-bit word that was used as a bit map. I have split them into two classes:
6149 those that are passed in the argument to log_write(), and those that are
6150 only ever tested independently outside of that function. These are now in
6151 separate 32-bit words, so there is plenty of room for expansion again.
6152 There is no change in the user interface or the logging behaviour.
6154 (b) When building, for example, log lines, the code previously used a
6155 macro that called string_cat() twice, in order to add two strings. This is
6156 not really sufficiently general. Furthermore, there was one instance where
6157 it was actually wrong because one of the argument was used twice, and in
6158 one call a function was used. (As it happened, calling the function twice
6159 did not affect the overall behaviour.) The macro has been replaced by a
6160 function that can join an arbitrary number of extra strings onto a growing
6163 (c) The code for expansion conditions now uses a table and a binary chop
6164 instead of a serial search (which was left over from when there were very
6165 few conditions). Also, it now recognizes conditions like "pam" even when
6166 the relevant support is not compiled in: a suitably worded error message is
6167 given if an attempt is made to use such a condition.
6169 11. Added ${time_interval:xxxxx}.
6171 12. A bug was causing one of the ddress fields not to be passed back correctly
6172 from remote delivery subprocesses. The field in question was not being
6173 subsequently used, so this caused to problems in practice.
6175 13. Added new log selectors queue_time and deliver_time.
6177 14. Might have fixed a bug in maildirsizefile handling that threw up
6178 "unexpected character" debug warnings, and recalculated the data
6179 unnecessarily. In any case, I expanded the warning message to give more
6182 15. Added the message "Restricted characters in address" to the statements in
6183 the default ACL that block characters like @ and % in local parts.
6185 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6186 Three changes have been made:
6188 (a) There was a serious bug; a negative response to MAIL caused the whole
6189 recipient domain to be cached as invalid, thereby blocking all messages
6190 to all local parts at the same domain, from all senders. This bug has
6191 been fixed. The domain is no longer cached after a negative response to
6192 MAIL if the sender used is not empty.
6194 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6197 (c) A new callout option, "use_sender" has been added for people who want
6198 the modified behaviour.
6204 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6207 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6208 indeed breaks things for older releases.
6210 3. Added additional logging to the case where there is a problem reading data
6211 from a filter that is running in a subprocess using a pipe, in order to
6212 try to track down a specific problem.
6214 4. Testing facility fudge: when running in the test harness and attempting
6215 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6216 getting "No route to host". Convert this to a timeout.
6218 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6221 6. Some OS don't have socklen_t but use size_t instead. This affects the
6222 fifth argument of getsockopt() amongst other things. This is now
6223 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6224 can be set for individual OS. I have set it for SunOS5, OSF1, and
6225 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6226 some earlier ones do not.
6228 7. Change 4.30/15 was not doing the test caselessly.
6230 8. The standard form for an IPv6 address literal was being rejected by address
6231 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6232 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6233 this, as well as the form without the "IPv6" on the front (but only when
6234 address literals are enabled, of course).
6236 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6238 10. Exim crashed if a message with an empty sender address specified by -f
6239 encountered a router with an errors_to setting. This could be provoked only
6240 by a command such as
6244 where an empty string was supplied; "<>" did not hit this bug.
6246 11. Installed PCRE release 4.5.
6248 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6249 remained set. It is now erased.
6251 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6252 times from message ids (which are base 36 rather than the normal 62).
6254 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6255 were being counted as actual protocol errors, and logged if the log
6256 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6257 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6258 and DATA following a set of rejected RCPTs do not count as protocol errors.
6259 In other words, Exim assumes they were pipelined, though this may not
6260 actually be the case. Of course, in all cases the client gets an
6261 appropriate error code.
6263 15. If a lookup fails in an ACL condition, a message about the failure may
6264 be available; it is used if testing the ACL cannot continue, because most
6265 such messages specify what the cause of the deferral is. However, some
6266 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6267 that caused an old message to be retained and used if a later statement
6268 caused a defer, replacing the real cause of the deferral.
6270 16. If an IP address had so many PTR records that the DNS lookup buffer
6271 was not large enough to hold them, Exim could crash while trying to process
6272 the truncated data. It now detects and logs this case.
6274 17. Further to 4.21/58, another change has been made: if (and only if) the
6275 first line of a message (the first header line) ends with CRLF, a bare LF
6276 in a subsequent header line has a space inserted after it, so as not to
6277 terminate the header.
6279 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6280 unnecessarily, used atoi() instead of strtol(), and didn't check the
6281 termination when getting file sizes from file names by regex.
6283 19. Completely re-implemented the support for maildirsize files, in the light
6284 of a number of problems with the previous contributed implementation
6285 (4.30/29). In particular:
6287 . If the quota is zero, the maildirsize file is maintained, but no quota is
6290 . If the maildir directory does not exist, it is created before any attempt
6291 to write a maildirsize file.
6293 . The quota value in the file is just a cache; if the quota is changed in
6294 the transport, the new value overrides.
6296 . A regular expression is available for excluding directories from the
6299 20. The autoreply transport checks the characters in options that define the
6300 message's headers; it allows continued headers, but it was checking with
6301 isspace() after an embedded newline instead of explicitly looking for a
6304 21. If all the "regular" hosts to which an address was routed had passed their
6305 expiry times, and had not reached their retry times, the address was
6306 bounced, even if fallback hosts were defined. Now Exim should go on to try
6309 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6310 equivalent code in the SMTP transport. Some hosts send humungous responses
6311 to HELO/EHLO, more than 1024 it seems.
6313 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6314 gives compiler warnings in some environments. I've now done it "properly",
6317 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6318 (because of problems with the built-in one) was declared to return uschar *
6319 instead of char *, causing compiler failure.
6321 25. Fixed a file descriptor leak when processing alias/forward files.
6323 26. Fixed a minor format string issue in dbfn.c.
6325 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6327 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6328 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6331 29. When a sender address is verified, it is cached, to save repeating the test
6332 when there is more than one recipient in a message. However, when the
6333 verification involves a callout, it is possible for different callout
6334 options to be set for different recipients. It is too complicated to keep
6335 track of this in the cache, so now Exim always runs a verification when a
6336 callout is required, relying on the callout cache for the optimization.
6337 The overhead is duplication of the address routing, but this should not be
6340 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6341 to be verified with callout=postmaster, and the main callout worked but the
6342 postmaster check failed, the verification correctly failed. However, if a
6343 subsequent RCPT command asked for sender verification *without* the
6344 postmaster check, incorrect caching caused this verification also to fail,
6347 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6348 it was not caching the DNS options (qualify_single, search_parents) that
6349 were used when the lookup failed. A subsequent lookup with different
6350 options therefore always gave the same answer, though there were cases
6351 where it should not have. (Example: a "domains = !$mx_any" option on a
6352 dnslookup router: the "domains" option is always processed without any
6353 widening, but the router might have qualify_single set.) Now Exim uses the
6354 cached value only when the same options are set.
6356 32. Added John Jetmore's "exipick" utility to the distribution.
6358 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6359 than a timeout (e.g. a certificate is required, and is not provided), an
6360 Exim server now closes the connection immediately. Previously it waited for
6361 the client to close - but if the client is SSL, it seems that they each
6362 wait for each other, leading to a delay before one of them times out.
6364 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6365 maintained 0.8.x compatibility because I don't think many are using it, and
6366 it is clearly obsolete.
6368 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6371 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6372 client certificate was expired. A simple patch fixes this, though I don't
6373 understand the full logic of why the verify callback is called multiple
6376 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6377 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6378 which causes problems with some clients (such as the Certicom SSL Plus
6379 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6380 disables the coutermeasure allowing Eudora to connect."
6382 38. Exim was not checking that a write() to a log file succeeded. This could
6383 lead to Bad Things if a log got too big, in particular if it hit a file
6384 size limit. Exim now panics and dies if it cannot write to a log file, just
6385 as it does if it cannot open a log file.
6387 39. Modified OS/Makefile-Linux so that it now contains
6389 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6391 The two -D definitions ensure that Exim is compiled with large file
6392 support, which makes it possible to handle log files that are bigger than
6395 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6396 instance) a domain was checked against a named list that involved a lookup,
6397 causing $domain_data to be set, then another domain was checked against the
6398 same list, then the first domain was re-checked, the value of $domain_data
6399 after the final check could be wrong. In particular, if the second check
6400 failed, it could be set empty. This bug probably also applied to
6403 41. The strip_trailing_dot option was not being applied to the address given
6404 with the -f command-line option.
6406 42. The code for reading a message's header from the spool was incrementing
6407 $received_count, but never initializing it. This meant that the value was
6408 incorrect (doubled) while delivering a message in the same process in which
6409 it was received. In the most common configuration of Exim, this never
6410 happens - a fresh exec is done - but it can happen when
6411 deliver_drop_privilege is set.
6413 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6414 it now includes up to 150 characters of the unexpected data in the log
6417 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6418 and building data strings. The size of both of these buffers was 10 000
6419 bytes - far larger than anybody would *ever* want, thought I. Needless to
6420 say, somebody hit the limit. I have increased the maximum line length to
6421 20 000 and the maximum data length of concatenated lines to 100 000. I have
6422 also fixed two bugs, because there was no checking on these buffers. Tsk,
6423 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6424 buffer is too small.
6426 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6427 lsearch lookups. Now it does.
6429 46. When parsing a route_list item in a manualroute router, a fixed-length
6430 buffer was used for the list of hosts. I made this 1024 bytes long,
6431 thinking that nobody would ever have a list of hosts that long. Wrong.
6432 Somebody had a whole pile of complicated expansion conditions, and the
6433 string was silently truncated, leading to an expansion error. It turns out
6434 that it is easier to change to an unlimited length (owing to other changes
6435 that have happened since this code was originally written) than to build
6436 structure for giving a limitation error. The length of the item that
6437 expands into the list of hosts is now unlimited.
6439 47. The lsearch lookup could not handle data where the length of text line was
6440 more than 4095 characters. Such lines were truncated, leading to shortened
6441 data being returned. It should now handle lines of any length.
6443 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6444 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6447 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6448 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6449 no longer happens in comment lines. A list of replacements is now placed
6450 at the head of all of the source files, except those whose only change is
6451 to replace PERL_COMMAND in the very first #! line.
6453 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6454 messages on the queue, with a bottom-up merge sort, using code contributed
6455 by Michael Haardt. This should make operations like -bp somewhat faster on
6456 large queues. It won't affect queue runners, except when queue_run_in_order
6459 51. Installed eximstats 1.31 in the distribution.
6461 52. Added support for SRV lookups to the dnslookup router.
6463 53. If an ACL referred to $message_body or $message_body_end, the value was not
6464 reset for any messages that followed in the same SMTP session.
6466 54. The store-handling optimization for building very long strings was not
6467 differentiating between the different store pools. I don't think this
6468 actually made any difference in practice, but I've tidied it.
6470 55. While running the routers to verify a sender address, $sender_address
6471 was still set to the sender address. This is wrong, because when routing to
6472 send a bounce to the sender, it would be empty. Therefore, I have changed
6473 it so that, while verifying a sender address, $sender_address is set to <>.
6474 (There is no change to what happens when verifying a recipient address.)
6476 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6477 target A or AAAA records (if not already returned) without resetting the
6478 qualify_single or search_parents options of the DNS resolver. These are
6479 inappropriate in this case because the targets of MX and SRV records must
6480 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6481 target that, when qualified, matched something in the local domain. These
6482 two options are now turned off when doing these lookups.
6484 57. It seems that at least some releases of Reiserfs (which does not have the
6485 concept of a fixed number of inodes) returns zero and not -1 for the
6486 number of available inodes. This interacted badly with check_spool_inodes,
6487 which assumed that -1 was the "no such thing" setting. What I have done is
6488 to check that the total number of inodes is greater than zero before doing
6489 the test of how many are available.
6491 58. When a "warn" ACL statement has a log_message modifier, the message is
6492 remembered, and not repeated. This is to avoid a lot of repetition when a
6493 message has many recipients that cause the same warning to be written.
6494 However, Exim was preserving the list of already written lines for an
6495 entire SMTP session, which doesn't seem right. The memory is now reset if a
6496 new message is started.
6498 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6499 debugging output unless log_rewrite was also set.
6501 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6502 of (int)(handle) when we know that handle contains (void *)(-1).
6504 61. The Exim daemon panic-logs an error return when it closes the incoming
6505 connection. However "connection reset by peer" seems to be common, and
6506 isn't really an error worthy of noting specially, so that particular error
6509 62. When Exim is trying to find all the local interfaces, it used to panic and
6510 die if the ioctl to get the interface flags failed. However, it seems that
6511 on at least one OS (Solaris 9) it is possible to have an interface that is
6512 included in the list of interfaces, but for which you get a failure error
6513 for this call. This happens when the interface is not "plumbed" into a
6514 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6515 failure of the "get flags" call assumes that the interface is down.
6517 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6518 makes life easier for people who are doing arithmetic on fields extracted
6519 from dates, where you often get leading zeros that should not be
6520 interpreted as octal.
6522 64. Added qualify_domain to the redirect router, to override the global
6525 65. If a pathologically long header line contained very many addresses (the
6526 report of this problem mentioned 10 000) and each of them was rewritten,
6527 Exim could use up a very large amount of memory. (It kept on making new
6528 copies of the header line as it rewrote, and never released the old ones.)
6529 At the expense of a bit more processing, the header rewriting function has
6530 been changed so that it no longer eats memory in this way.
6532 66. The generation of the Received: header has been moved from the time that a
6533 message starts to be received, to the time that it finishes. The timestamp
6534 in the Received: header should now be very close to that of the <= log
6535 line. There are two side-effects of this change:
6537 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6538 logged header lines no longer include the local Received: line, because
6539 it has not yet been created. The same applies to a copy of the message
6540 that is returned to a non-SMTP sender when a message is rejected.
6542 (b) When a filter file is tested using -bf, no additional Received: header
6543 is added to the test message. After some thought, I decided that this
6546 This change does not affect the value of $received_for. It is still set
6547 after address rewriting, but before local_scan() is called.
6549 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6551 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6552 gave an unhelpful panic error message, and a defer error. I have managed to
6553 change this behaviour so that it now rejects any supplied certificate,
6554 which seems right, as the list of acceptable certificates is empty.
6556 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6557 gave an unhelpful defer error. I have not managed to make this reject any
6558 supplied certificates, but the error message it gives is "no certificate
6559 supplied", which is not helpful.
6561 70. exigrep's output now also includes lines that are not associated with any
6562 message, but which match the given pattern. Implemented by a patch from
6563 Martin Sluka, which also tidied up the Perl a bit.
6565 71. Recipient callout verification, like sender verification, was using <> in
6566 the MAIL FROM command. This isn't really the right thing, since the actual
6567 sender may affect whether the remote host accepts the recipient or not. I
6568 have changed it to use the actual sender in the callout; this means that
6569 the cache record is now keyed on a recipient/sender pair, not just the
6570 recipient address. There doesn't seem to be a real danger of callout loops,
6571 since a callout by the remote host to check the sender would use <>.
6572 [SEE ABOVE: changed after hitting problems.]
6574 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6575 temporary errors. However, in the case of such a code being given after
6576 the end of a data transmission (i.e. after ".") Exim was failing to write
6577 a retry record for the message. (Yes, there was some broken host that was
6578 actually sending 8xx at this point.)
6580 73. An unknown lookup type in a host list could cause Exim to panic-die when
6581 the list was checked. (An example that provoked this was putting <; in the
6582 middle of a list instead of at the start.) If this happened during a DATA
6583 ACL check, a -D file could be left lying around. This kind of configuration
6584 error no longer causes Exim to die; instead it causes a defer error. The
6585 incident is still logged to the main and panic logs.
6587 74. Buglet left over from Exim 3 conversion. The message "too many messages
6588 in one connection" was written to the rejectlog but not the mainlog, except
6589 when address rewriting (yes!) was being logged.
6591 75. Added write_rejectlog option.
6593 76. When a system filter was run not as root (that is, when system_filter_user
6594 was set), the values of the $n variables were not being returned to the
6595 main process; thus, they were not subsequently available in the $sn
6598 77. Added +return_path_on_delivery log selector.
6600 78. A connection timeout was being treated differently from recipients deferred
6601 when testing hosts_max_try with a message that was older than the host's
6602 retry timeout. (The host should not be counted, thus allowing all hosts to
6603 be tried at least once before bouncing.) This may have been the cause of an
6604 occasionally reported bug whereby a message would remain on the queue
6605 longer than the retry timeout, but would be bounced if a delivery was
6606 forced. I say "may" because I never totally pinned down the problem;
6607 setting up timeout/retry tests is difficult. See also the next item.
6609 79. The ultimate address timeout was not being applied to errors that involved
6610 a combination of host plus message (for example, a timeout on a MAIL
6611 command). When an address resolved to a number of possible hosts, and they
6612 were not all tried for each delivery (e.g. because of hosts_max_try), a
6613 message could remain on the queue longer than the retry timeout.
6615 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6618 81. Fixed an obscure SMTP outgoing bug which required at least the following
6619 conditions: (a) there was another message waiting for the same server;
6620 (b) the server returned 5xx to all RCPT commands in the first message so
6621 that the message was not completed; (c) the server dropped the connection
6622 or gave a negative response to the RSET that Exim sends to abort the
6623 transaction. The observed case was a dropped connection after DATA that had
6624 been sent in pipelining mode. That is, the server had advertised PIPELINING
6625 but was not implementing it correctly. The effect of the bug was incorrect
6626 behaviour, such as trying another host, and this could lead to a crash.
6632 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6633 and daemon.c were passed as pointers to ints; they should have been
6634 pointers to socklen_t variables (which are typically unsigned ints).
6636 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6639 3. Fixed a really odd bug that affected only the testing scheme; patching a
6640 certain fixed string in the binary changed the value of another string that
6641 happened to be identical to the end of the original first string.
6643 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6644 name", it returns that address as the IP address. On some operating
6645 systems (e.g. Solaris), it also passes back the IP address string as the
6646 "host name". However, on others (e.g. Linux), it passes back an empty
6647 string. Exim wasn't checking for this, and was changing the host name to an
6648 empty string, assuming it had been canonicalized.
6650 5. Although rare, it is permitted to have more than one PTR record for a given
6651 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6652 all the names associated with an address, because they do in Solaris.
6653 However, it seems that they do not in Linux for data that comes from the
6654 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6655 I found this out when I moved to a new Linux workstation and tried to run
6656 the Exim test suite.
6658 To get round this problem I have changed the code so that it now does its
6659 own call to the DNS to look up PTR records when searching for a host name.
6660 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6661 addresses that are only in /etc/hosts are still found.
6663 This behaviour is, however, controlled by an option called host_lookup_
6664 order, which defaults to "bydns:byaddr". If people want to use the other
6665 order, or indeed, just use one or the other means of lookup, they can
6666 specify it in this variable.
6668 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6669 some operating systems, this comes back from gethostbyaddr() as an empty
6670 string, and this is what Exim used to test for. However, it seems that in
6671 other systems, "." is yielded. Exim now tests for this case too.
6673 7. The values of check_spool_space and check_log_space are now held internally
6674 as a number of kilobytes instead of an absolute number of bytes. If a
6675 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6676 kilobyte. This means that much larger values can be stored.
6678 8. Exim monitor: an attempt to get the action menu when not actually pointing
6679 at a message produces an empty menu entitled "No message selected". This
6680 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6681 no entries in it ("Shell widget menu has zero width and/or height"). So I
6682 have added a single, blank menu entry in this case.
6684 9. Added ${quote_local_part.
6686 10. MIME decoding is now applied to the contents of Subject: header lines when
6689 11. Now that a reference to $sender_host_address automatically causes a reverse
6690 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6691 host lookup before query-style lookups in lists that might use this
6692 variable. This has therefore been abolished, and the "net-" prefix is no
6693 longer necessary for query-style lookups.
6695 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6696 have been a typo for LFLAGS, so it has been changed.
6698 13. The install script calls Exim with "-C /dev/null" in order to find the
6699 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6700 to be output. However, since Exim outputs its version number before the
6701 error, it didn't break the script. It just looked ugly. I fixed this by
6702 always allowing "-C /dev/null" if the caller is root.
6704 14. Ignore overlarge ACL variable number when reading spool file - insurance
6705 against a later release with more variables having written the file.
6707 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6708 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6709 this, as well as the form without the "IPv6" on the front.
6711 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6712 OS/Makefile-Darwin file.
6714 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6715 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6717 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6718 variable. However, some OS use ints for inodes. I've added cast to long int
6719 to get rid of the compiler warning.
6721 19. I had forgotten to lock out "/../" in configuration file names when
6722 ALT_CONFIG_PREFIX was set.
6724 20. Routers used for verification do not need to specify transports. However,
6725 if such a router generated a host list, and callout was configured, Exim
6726 crashed, because it could not find a port number from the (non-existent)
6727 transport. It now assumes port 25 in this circumstance.
6729 21. Added the -t option to exigrep.
6731 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6732 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6733 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6734 them is set, LOOKUP_LSEARCH is forced.
6736 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6738 24. Added sender and host information to the "rejected by local_scan()" log
6739 line; previously there was no indication of these.
6741 25. Added .include_if_exists.
6743 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6744 Linux. It turns out that not all file systems support this. Apparently some
6745 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6746 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6747 not supported on the file descriptor, is now ignored when Exim is trying to
6748 sync a directory. This applies only to Linux.
6750 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6752 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6753 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6756 29. Added support for maildirsize files from supplied patch (modified a bit).
6758 30. The use of :fail: followed by an empty string could lead Exim to respond to
6759 sender verification failures with (e.g.):
6761 550 Verification failed for <xxx>
6762 550 Sender verify failed
6764 where the first response line was missing the '-' that indicates it is not
6765 the final line of the response.
6767 31. The loop for finding the name of the user that called Exim had a hardwired
6768 limit of 10; it now uses the value of finduser_retries, which is used for
6769 all other user lookups.
6771 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6774 33. Exim was neglecting to zero errno before one call of strtol() when
6775 expanding a string and expecting an integer value. On some systems this
6776 resulted in spurious "integer overflow" errors. Also, it was casting the
6777 result into an int without checking.
6779 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6780 did not work. The code looks as if it has *never* worked, though it appears
6781 to have been documented since at least release 1.62. I have made it work.
6783 35. The "timeout_DNS" error in retry rules, also documented since at least
6784 1.62, also never worked. As it isn't clear exactly what this means, and
6785 clearly it isn't a major issue, I have abolished the feature by treating it
6786 as "timeout", and writing a warning to the main and panic logs.
6788 36. The display of retry rules for -brt wasn't always showing the error code
6791 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6792 timeout_connect_A, timeout_connect_MX.
6794 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6795 to the empty sender.
6797 39. The daemon was not analysing the content of -oX till after it had closed
6798 stderr and disconnected from the controlling terminal. This meant that any
6799 syntax errors were only noted on the panic log, and the return code from
6800 the command was 0. By re-arranging the code a little, I've made the
6801 decoding happen first, so such errors now appear on stderr, and the return
6802 code is 1. However, the actual setting up of the sockets still happens in
6803 the disconnected process, so errors there are still only recorded on the
6806 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6807 connections (as happens on some IP stacks) was logged at start up time as
6808 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6809 it from "IPv6 and IPv4", which means that two separate sockets are being
6812 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6813 says whether AF_INET or AF_INET6 was passed as an argument.
6815 42. Exiwhat output was messed up when time zones were included in log
6818 43. Exiwhat now gives more information about the daemon's listening ports,
6819 and whether -tls-on-connect was used.
6821 44. The "port" option of the smtp transport is now expanded.
6823 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6824 silently ignored. Now an error message is written to the main and panic
6827 46. There's a new ACL modifier called "logwrite" which writes to a log file
6828 as soon as it is encountered.
6830 47. Added $local_user_uid and $local_user_gid at routing time.
6832 48. Exim crashed when trying to verify a sender address that was being
6835 49. Exim was recognizing only a space character after ".include". It now also
6836 recognizes a tab character.
6838 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6839 extracting the relevant information from the specification. The man page no
6840 longer contains scrambled data for the -d option, and I've added a section
6841 at the front about calling Exim under different names.
6843 51. Added "extra_headers" argument to the "mail" command in filter files.
6845 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6848 53. Installed eximstats 1.29.
6850 54. Added transport_filter_timeout as a generic transport option.
6852 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6853 Cc: header lines. This was required by RFC 822, but it not required by RFC
6856 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6857 incoming messages that did not have them. Now it does so only if the
6858 message originates locally, that is, if there is no associated remote host
6859 address. When Resent- header lines are present, this applies to the Resent-
6860 lines rather than the non-Resent- lines.
6862 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6863 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6865 58. Messages for configuration errors now include the name of the main
6866 configuration file - useful now that there may be more than one file in a
6867 list (.included file names were always shown).
6869 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6870 for those rare installations that do not start the daemon as root or run it
6871 setuid root. I've cut out the call to initgroups() if the daemon is not
6874 60. The Exim user and group can now be bound into the binary as text strings
6875 that are looked up at the start of Exim's processing.
6877 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6879 62. Added $mailstore_basename variable.
6881 63. Installed patch to sieve.c from Michael Haardt.
6883 64. When Exim failed to open the panic log after failing to open the main log,
6884 the original message it was trying to log was written to stderr and debug
6885 output, but if they were not available (the usual case in production), it
6886 was lost. Now it is written to syslog before the two lines that record the
6887 failures to open the logs.
6889 65. Users' Exim filters run in subprocesses under the user's uid. It is
6890 possible for a "deliver" command or an alias in a "personal" command to
6891 provoke an address rewrite. If logging of address rewriting is configured,
6892 this fails because the process is not running as root or exim. There may be
6893 a better way of dealing with this, but for the moment (because 4.30 needs
6894 to be released), I have disabled address rewrite logging when running a
6895 filter in a non-root, non-exim process.
6901 1. The buildconfig auxiliary program wasn't quoting the value set for
6902 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6903 not defined. This bug was masked in 4.22 by the effect that was fixed in
6906 2. Some messages that were rejected after a message id was allocated were
6907 shown as "incomplete" by exigrep. It no longer does this for messages that
6908 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6910 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6911 have allow_domain_literals set, the ID did not get logged in the <= line.
6912 Domain literals are now always recognized in Message-ID: header lines.
6914 4. The first argument for a ${extract expansion item is the key name or field
6915 number. Leading and trailing spaces in this item were not being ignored,
6916 causing some misleading effects.
6918 5. When deliver_drop_privilege was set, single queue runner processes started
6919 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6920 same command in the process it spins off) were not dropping privilege.
6922 6. When the daemon running as "exim" started a queue runner, it always
6923 re-executed Exim in the spun-off process. This is a waste of effort when
6924 deliver_drop_privilege is set. The new process now just calls the
6925 queue-runner function directly.
6931 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6934 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6935 ignored. Though the use of -oP was forcing the writing of a pid file, it
6936 was always written to the default place.
6938 3. If the message "no IP address found for host xxxx" is generated during
6939 incoming verification, it is now followed by identification of the incoming
6940 connection (so you can more easily find what provoked it).
6942 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6944 5. Added some features to "harden" Exim a bit more against certain attacks:
6946 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6947 be put in Local/Makefile. This is like the never_users runtime option,
6948 but it cannot be overridden. The default setting is "root".
6950 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6951 prefix string with which any file named in a -C command line option
6954 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6955 is retained for -C and -D only if the caller of Exim is root. Without
6956 it, the exim user may also use -C and -D and retain privilege.
6958 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6959 command line option is disabled.
6961 6. Macro names set by the -D option must start with an upper case letter, just
6962 like macro names defined in the configuration file.
6964 7. Added "dereference=" facility to LDAP.
6966 8. Two instances of the typo "uknown" in the source files are fixed.
6968 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6969 the Configure-Makefile script screwed up while processing it.
6971 10. Incorporated PCRE 4.4.
6973 11. The SMTP synchronization check was not operating right at the start of an
6974 SMTP session. For example, it could not catch a HELO sent before the client
6975 waited for the greeting. There is now a check for outstanding input at the
6976 point when the greeting is written. Because of the duplex, asynchronous
6977 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6978 way, but not yet received, when the check is performed.
6980 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6981 on TCP/IP sockets, because this apparently causes some broken clients to
6984 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6985 unchanged) from the Cygwin maintainer.
6987 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6988 was supported instead of testing for mbx. Effectively a typo.
6990 15. The spa authenticator server code was not checking that the input it
6991 received was valid base64.
6993 16. The debug output line for the "set" modifier in ACLs was not showing the
6994 name of the variable that was being set.
6996 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6998 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6999 lookup on its own. Something else was needed to trigger the lookup. For
7000 example, a match in host_lookup or the need for a host name in a host list.
7001 Now, if $sender_host_name is referenced and the host name has not yet been
7002 looked up, a lookup is performed. If the lookup fails, the variable remains
7003 empty, and $host_lookup_failed is set to "1".
7005 19. Added "eqi" as a case-independent comparison operator.
7007 20. The saslauthd authentication condition could segfault if neither service
7008 nor realm was specified.
7010 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7011 error message that was logged was misleading, and incoming SMTP
7012 connections were dropped. The message is now more accurate, and temporary
7013 errors are given to SMTP connections.
7015 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7016 (except RSET) with a 421 error, until QUIT is received. However, it was
7017 failing to send a response to QUIT.
7019 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7020 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7021 ACL is now run after the helo_try_verify_hosts code.
7023 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7024 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7025 case-independent, so other case variants are also recognized). Apparently
7026 some systems use these upper case variants.
7028 25. If more than two messages were waiting for the same host, and a transport
7029 filter was specified for the transport, Exim sent two messages over the
7030 same TCP/IP connection, and then failed with "socket operation on non-
7031 socket" when it tried to send the third.
7033 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7035 27. The extern definition of crypt16() in expand.c was not being excluded when
7036 the OS had its own crypt16() function.
7038 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7039 as a preferred synonym for return_size_limit, both as an option and as an
7042 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7044 30. Changed the default configuration ACL to relax the local part checking rule
7045 for addresses that are not in any local domains. For these addresses,
7046 slashes and pipe symbols are allowed within local parts, but the sequence
7047 /../ is explicitly forbidden.
7049 31. SPA server authentication was not clearing the challenge buffer before
7052 32. log_message in a "warn" ACL statement was writing to the reject log as
7053 well as to the main log, which contradicts the documentation and doesn't
7054 seem right (because no rejection is happening). So I have stopped it.
7056 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7057 However, I am unable to do any testing of this.
7059 34. Fixed an infelicity in the appendfile transport. When checking directories
7060 for a mailbox, to see if any needed to be created, it was accidentally
7061 using path names with one or more superfluous leading slashes; tracing
7062 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7064 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7065 contents are added to the log line that is written for every discarded
7066 recipient. (Previously a log_message setting was ignored.)
7068 36. The ${quote: operator now quotes the string if it is empty.
7070 37. The install script runs exim in order to find its version number. If for
7071 some reason other than non-existence or emptiness, which it checks, it
7072 could not run './exim', it was installing it with an empty version number,
7073 i.e. as "exim-". This error state is now caught, and the installation is
7076 38. An argument was missing from the function that creates an error message
7077 when Exim fails to connect to the socket for saslauthd authentication.
7078 This could cause Exim to crash, or give a corrupted message.
7080 39. Added isip, isip4, and isip6 to ${if conditions.
7082 40. The ACL variables $acl_xx are now saved with the message, and can be
7083 accessed later in routers, transports, and filters.
7085 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7086 strings in the file are not string-expanded.
7088 42. If a MAIL command specified a SIZE value that was too large to fit into an
7089 int variable, the check against message_size_limit failed. Such values are
7090 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7091 day this will have to be increased, but I don't think I want to be around
7092 when emails are that large.
7099 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7100 iconv() is not standard in FreeBSD.
7102 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7103 IPv6 enabled. The observed symptom was a segmentation fault on return from
7104 the function os_common_find_running_interfaces() in src/os.c.
7106 3. In the check_special_case() function in daemon.c I had used "errno" as an
7107 argument name, which causes warnings on some systems. This was basically a
7108 typo, since it was named "eno" in the comments!
7110 4. The code that waits for the clock to tick (at a resolution of some fraction
7111 of a second) so as to ensure message-id uniqueness was always waiting for
7112 at least one whole tick, when it could have waited for less. [This is
7113 almost certainly not relevant at current processor speeds, where it is
7114 unlikely to ever wait at all. But we try to future-proof.]
7116 5. The function that sleeps for a time interval that includes fractions of a
7117 second contained a race. It did not block SIGALRM between setting the
7118 timer, and suspending (a couple of lines later). If the interval was short
7119 and the sigsuspend() was delayed until after it had expired, the suspension
7120 never ended. On busy systems this could lead to processes getting stuck for
7123 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7124 process, before it forks any delivery processes. The open lookup caching
7125 mechanism meant that the open file or database connection was passed into
7126 the delivery process. The problem was that delivery processes always tidy
7127 up cached lookup data. This could cause a problem for the next delivery
7128 process started by the queue runner, because the external queue runner
7129 process does not know about the closure. So the next delivery process
7130 still has data in the lookup cache. In the case of a file lookup, there was
7131 no problem because closing a file descriptor in a subprocess doesn't affect
7132 the parent. However, if the lookup was caching a connection to a database,
7133 the connection was closed, and the second delivery process was likely to
7134 see errors such as "PGSQL: query failed: server closed the connection
7135 unexpectedly". The problem has been fixed by closing all cached lookups
7136 in a queue runner before running a delivery process.
7138 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7139 seem to have the "const" qualifier which it has on other OS. I've
7142 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7143 *of the same type* (client or server) with the same public name that an
7144 error should be diagnosed.
7146 9. When Exim looked up a host name for an IP address, but failed to find the
7147 original IP address when looking up the host name (a safety check), it
7148 output the message "<ip address> does not match any IP for NULL", which was
7149 confusing, to say the least. The bug was that the host name should have
7150 appeared instead of "NULL".
7152 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7153 user that is built into the binary, and the -C or -D options is used, root
7154 privilege is dropped before the configuration file is read. In addition,
7155 logging is switched to stderr instead of the normal log files. If the
7156 configuration then re-defines the Exim user, the unprivileged environment
7157 is probably not what is expected, so Exim logs a panic warning message (but
7160 However, if deliver_drop_privilege is set, the unprivileged state may well
7161 be exactly what is intended, so the warning has been cut out in that case,
7162 and Exim is allowed to try to write to its normal log files.
7168 1. smtp_return_error_details was not giving details for temporary sender
7169 or receiver verification errors.
7171 2. Diagnose a configuration error if two authenticators have the same public
7174 3. Exim used not to create the message log file for a message until the first
7175 delivery attempt. This could be confusing when incoming messages were held
7176 for policy or load reasons. The message log file is now created at the time
7177 the message is received, and an initial "Received" line is written to it.
7179 4. The automatically generated man page for command line options had a minor
7180 bug that caused no ill effects; however, a more serious problem was that
7181 the procedure for building the man page automatically didn't always
7182 operate. Consequently, release 4.20 contains an out-of-date version. This
7183 shouldn't happen again.
7185 5. When building Exim with embedded Perl support, the script that builds the
7186 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7187 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7189 6. The freeze_tell option was not being used for messages that were frozen on
7190 arrival, either by an ACL or by local_scan().
7192 7. Added the smtp_incomplete_transaction log selector.
7194 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7195 was accepting AUTH without a new EHLO.
7197 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7198 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7201 10. Logging of TCP/IP connections (when configured) now happens in the main
7202 daemon process instead of the child process, so that the TCP/IP connection
7203 count is more accurate (but it can never be perfect).
7205 11. The use of "drop" in a nested ACL was not being handled correctly in the
7206 outer ACL. Now, if condition failure induced by the nested "drop" causes
7207 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7208 or "require"), the connection is dropped.
7210 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7211 that yield "discard" can now be used with an "accept" or a "discard" verb,
7212 but an error is generated for any others (because I can't see a useful way
7213 to define what should happen).
7215 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7216 are now processed in the same way as lines in the Exim configuration file.
7217 In particular, continuation lines are supported.
7219 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7221 15. Added -ti meaning -t -i.
7223 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7224 domains, and warn by logging if others are found.
7226 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7227 returned from GIFCONF when Exim is trying to find the list of interfaces on
7228 a host. The code in os.c has been modified to copy each ifreq to an aligned
7229 structure in all cases.
7231 Also, in some cases, the returned ifreq's were being copied to a 'struct
7232 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7233 means the last couple of bytes of an IPv6 address could be chopped if the
7234 ifreq contained only a normal sockaddr (14 bytes storage).
7236 18. Named domain lists were not supported in the hosts_treat_as_local option.
7237 An entry such as +xxxx was not recognized, and was treated as a literal
7240 19. Ensure that header lines added by a DATA ACL are included in the reject log
7241 if the ACL subsequently rejects the message.
7243 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7244 MD5 (which is deprecated).
7246 21. When testing a filter file using -bf, Exim was writing a message when it
7247 took the sender from a "From " line in the message, but it was not doing so
7248 when it took $return_path from a Return-Path: header line. It now does.
7250 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7251 with a valid header line field name (a series of printing characters
7252 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7254 23. Changed "disc" in the source to "disk" to conform to the documentation and
7255 the book and for uniformity.
7257 24. Ignore Sendmail's -Ooption=value command line item.
7259 25. When execve() failed while trying to run a command in a pipe transport,
7260 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7261 could be confused with a return value of 69 from the command itself. This
7262 has been changed to 127, the value the shell returns if it is asked to run
7263 a non-existent command. The wording for the related log line suggests a
7264 non-existent command as the problem.
7266 26. If received_header_text expands to an empty string, do not add a Received:
7267 header line to the message. (Well, it adds a token one on the spool, but
7268 marks it "old" so that it doesn't get used or transmitted.)
7270 27. Installed eximstats 1.28 (addition of -nt option).
7272 28. There was no check for failure on the call to getsockname() in the daemon
7273 code. This can fail if there is a shortage of resources on the system, with
7274 ENOMEM, for example. A temporary error is now given on failure.
7276 29. Contrary to the C standard, it seems that in some environments, the
7277 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7278 program. Exim now does this explicitly; it affects the formatting of
7279 timestamps using strftime().
7281 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7282 complaints. I've now initialized all the variables, to avoid this.
7284 32. Header lines added by a system filter were not being "seen" during
7285 transport-time rewrites.
7287 33. The info_callback() function passed to OpenSSL is set up with type void
7288 (*)(SSL *, int, int), as described somewhere. However, when calling the
7289 function (actually a macro) that sets it up, the type void(*)() is
7290 expected. I've put in a cast to prevent warnings from picky compilers.
7292 34. If a DNS black list lookup found a CNAME record, but there were no A
7293 records associated with the domain it pointed at, Exim crashed.
7295 35. If a DNS black list lookup returned more than one A record, Exim ignored
7296 all but the first. It now scans all returned addresses if a particular IP
7297 value is being sought. In this situation, the contents of the
7298 $dnslist_value variable are a list of all the addresses, separated by a
7301 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7302 to accept a host name and all its aliases if the forward lookup for any of
7303 them yielded the IP address of the incoming connection. Now it accepts only
7304 those names whose forward lookup yields the correct IP address. Any other
7305 names are discarded. This closes a loophole whereby a rogue DNS
7306 administrator could create reverse DNS records to break through a
7307 wildcarded host restriction in an ACL.
7309 37. If a user filter or a system filter that ran in a subprocess used any of
7310 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7311 the wrong values were passed to the pipe command ($thisaddress had the
7312 value of $0, $0 had the value of $1, etc). This bug was introduced by
7313 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7315 38. Improved the line breaking for long SMTP error messages from ACLs.
7316 Previously, if there was no break point between 40 and 75 characters, Exim
7317 left the rest of the message alone. Two changes have been made: (a) I've
7318 reduced the minimum length to 35 characters; (b) if it can't find a break
7319 point between 35 and 75 characters, it looks ahead and uses the first one
7320 that it finds. This may give the occasional overlong line, but at least the
7321 remaining text gets split now.
7323 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7324 file descriptors might be low, and that setting 1000 would always raise it.
7325 It turns out that in some environments, the limit is already over 1000 and
7326 that lowering it causes trouble. So now Exim takes care not to decrease it.
7328 40. When delivering a message, the value of $return_path is set to $sender_
7329 address at the start of routing (routers may change the value). By an
7330 oversight, this default was not being set up when an address was tested by
7331 -bt or -bv, which affected the outcome if any router or filter referred to
7334 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7335 log only when "message" or "log_message" are set. However, if one of the
7336 conditions was an address verification, or a call to a nested ACL, the
7337 messages generated by the underlying test were being passed through. This
7338 no longer happens. The underlying message is available in $acl_verify_
7339 message for both "message" and "log_message" expansions, so it can be
7340 passed through if needed.
7342 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7343 new expansion $bh_ to give the encoded byte string without charset
7344 translation. Translation happens only if iconv() is available; HAVE_ICONV
7345 indicates this at build time. HEADERS_CHARSET gives the charset to
7346 translate to; headers_charset can change it in the configuration, and
7347 "headers charset" can change it in an individual filter file.
7349 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7350 that creates RFC 2047 encoded "words" labels them as that charset instead
7351 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7352 expansion operator; (ii) when Exim creates a From: line for a local
7353 message; (iii) when a header line is rewritten to include a "phrase" part.
7355 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7356 buggy, causing it to skip the first lines of messages whose message ID
7357 ended in 'D'. This would not have bitten before Exim release 4.14, because
7358 message IDs were unlikely to end in 'D' before then. The effect was to have
7359 incorrect size information for certain domains.
7361 45. #include "config.h" was missing at the start of the crypt16.c module. This
7362 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7365 46. If there was a timeout during a "random" callout check, Exim treated it as
7366 a failure of the random address, and carried on sending RSET and the real
7367 address. If the delay was just some slowness somewhere, the response to the
7368 original RCPT would be taken as a response to RSET and so on, causing
7369 mayhem of various kinds.
7371 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7372 when I implemented it. It didn't allow for the fact that some option values
7373 may legitimately be negative (e.g. size_addition), and it didn't even do
7374 the right test for positive values.
7376 48. Domain names in DNS records are case-independent. Exim always looks them up
7377 in lower case. Some resolvers return domain names in exactly the case they
7378 appear in the zone file, that is, they may contain uppercase letters. Not
7379 all resolvers do this - some return always lower case. Exim was treating a
7380 change of case by a resolver as a change of domain, similar to a widening
7381 of a domain abbreviation. This triggered its re-routing code and so it was
7382 trying to route what was effectively the same domain again. This normally
7383 caused routing to fail (because the router wouldn't handle the domain
7384 twice). Now Exim checks for this case specially, and just changes the
7385 casing of the domain that it ultimately uses when it transmits the message
7388 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7391 50. If a filter generated a file delivery with a non-absolute name (possible if
7392 no home directory exists for the router), the forbid_file option was not
7395 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7396 the existing equality matching.
7398 52. Exim was using ints instead of ino_t variables in some places where it was
7399 dealing with inode numbers.
7401 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7402 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7403 called TMPDIR, and if it finds it is different, it changes its value.
7405 54. The smtp_printf() function is now made available to local_scan() so
7406 additional output lines can be written before returning. There is also an
7407 smtp_fflush() function to enable the detection of a dropped connection.
7408 The variables smtp_input and smtp_batched_input are exported to
7411 55. Changed the default runtime configuration: the message "Unknown user"
7412 has been removed from the ACL, and instead placed on the localuser router,
7413 using the cannot_route_message feature. This means that any verification
7414 failures that generate their own messages won't get overridden. Similarly,
7415 the "Unrouteable address" message that was in the ACL for unverifiable
7416 relay addresses has also been removed.
7418 56. Added hosts_avoid_esmtp to the smtp transport.
7420 57. The exicyclog script was not checking for the esoteric option
7421 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7422 will work only if exicyclog is run under the appropriate euid.
7424 58. Following a discussion on the list, the rules by which Exim recognises line
7425 endings on incoming messages have been changed. The -dropcr and drop_cr
7426 options are now no-ops, retained only for backwards compatibility. The
7427 following line terminators are recognized: LF CRLF CR. However, special
7428 processing applies to CR:
7430 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7431 nor a local message in the state where . is a terminator.
7433 (ii) If a bare CR is encountered in a header line, an extra space is added
7434 after the line terminator so as not to end the header. The reasoning
7435 behind this is that bare CRs in header lines are most likely either
7436 to be mistakes, or people trying to play silly games.
7438 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7439 was being incorrectly given as 18 bytes larger than it should have been.
7440 This is a VOB (very old bug).
7442 60. This may never have affected anything current, but just in case it has:
7443 When the local host is found other than at the start of a list of hosts,
7444 the local host, those with the same MX, and any that follow, are discarded.
7445 When the list in question was part of a longer list of hosts, the following
7446 hosts (not currently being processed) were also being discarded. This no
7447 longer happens. I'm not sure if this situation could ever has previously
7450 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7453 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7454 header. This is something that is recommended in a new Internet Draft, and
7455 is something that is documented as being done by Sendmail. There are two
7456 possible values. For messages generated by the autoreply transport, Exim
7459 Auto-Submitted: auto-replied
7461 whereas for all other generated messages (e.g. bounces) it adds
7463 Auto-Submitted: auto-generated
7465 63. The "personal" condition in filters now includes a test for the
7466 Auto-Submitted: header. If it contains the string "auto-" the message it
7467 not considered personal.
7469 64. Added rcpt_include_affixes as a generic transport option.
7471 65. Added queue_only_override (default true).
7473 66. Added the syslog_duplication option.
7475 67. If what should have been the first header line of a message consisted of
7476 a space followed by a colon, Exim was mis-interpreting it as a header line.
7477 It isn't of course - it is syntactically invalid and should therefore be
7478 treated as the start of the message body. The misbehaviour could have
7479 caused a number of strange effects, including loss of data in subsequent
7480 header lines, and spool format errors.
7482 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7483 client host had authenticated. This control can now be exercised by an ACL
7484 for more flexibility.
7486 69. By default, callouts do not happen when testing with -bh. There is now a
7487 variant, -bhc, which does actually run the callout code, including
7488 consulting and updating the callout cache.
7490 70. Added support for saslauthd authentication, courtesy of Alexander
7493 71. If statvfs() failed on the spool or log directories while checking their
7494 size for availability, Exim confusingly gave the error "space shortage".
7495 Furthermore, in debugging mode it crashed with a floating point exception.
7496 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7497 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7498 serious problem, Exim now writes to the main and panic logs when this
7499 happens, with details of the failure. It then refuses to accept the
7500 incoming message, giving the message "spool directory problem" or "log
7501 directory problem" with a 421 code for SMTP messages.
7503 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7504 0, 1, and 2 exist, because some OS complain for execs without them (see
7505 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7506 descriptors. However, the code omitted to check that the open succeeded,
7507 causing mysterious errors if for some reason the permissions on /dev/null
7508 got screwed. Now Exim writes a message to the main and panic logs, and
7509 bombs out if it can't open /dev/null.
7511 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7512 interact so that it is all more flexible. It is supposed to remain
7513 backwards compatible. Also added extra_local_interfaces.
7515 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7516 to bomb out with an assertion failure - to the client this appears as a
7517 connection drop. This problem occurs in the part of the code that was taken
7518 from the Samba project. Fortunately, the assertion is in a very simple
7519 function, so I have fixed this by reproducing the function inline in the
7520 one place where it is called, and arranging for authentication to fail
7521 instead of killing the process with assert().
7523 75. The SPA client code was not working when the server requested OEM rather
7524 than Unicode encoding.
7526 76. Added code to make require_files with a specific uid setting more usable in
7527 the case where statting the file as root fails - usually a non-root-mounted
7528 NFS file system. When this happens and the failure is EACCES, Exim now
7529 forks a subprocess and does the per-uid checking as the relevant uid.
7531 77. Added process_log_path.
7533 78. If log_file_path was not explicitly set, a setting of check_log_space or
7534 check_log_inodes was ignored.
7536 79. If a space check for the spool or log partitions fails, the incident is now
7537 logged. Of course, in the latter case the data may get lost...
7539 80. Added the %p formatting code to string_format() so that it can be used to
7540 print addresses in debug_print(). Adjusted all the address printing in the
7541 debugging in store.c to use %p rather than %d.
7543 81. There was a concern that a line of code in smtp_in.c could overflow a
7544 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7545 initially expressed, the concern was not well-founded, because trailing
7546 spaces are removed early. However, if the trailing spaces were followed by
7547 a NULL, they did not get removed, so the overflow was possible. Two fixes
7550 (a) I re-wrote the offending code in a cleaner fashion.
7551 (b) If an incoming SMTP command contains a NULL character, it is rejected
7554 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7555 runs initgroups(), so that if the Exim user is in any additional groups,
7556 they will be used during message reception.
7562 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob