1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Avoid costly startup code when not strictly needed. This reduces time
10 for some exim process initialisations. It does mean that the logging
11 of TLS configuration problems is only done for the daemon startup.
13 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
15 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
16 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
19 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
20 DKIM signing is being done. Previously a transport_filter would always
21 disable CHUNKING, falling back to traditional DATA.
23 JH/05 Regard command-line receipients as tainted.
25 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
27 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
28 PAM library frees one of the arguments given to it, despite the
29 documentation. Therefore a plain malloc must be used.
31 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
32 on-stack buffers were used, resulting in a taint trap when DSN information
33 copied from a received message was written into the buffer.
35 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
36 the ordering of its ARC headers. This caused a crash.
38 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
39 a new record was being constructed with information from the peer, a trap
42 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
43 installation would get error messages from DMARC verify, when it hit the
44 nonexistent file indicated by the default. Distros wanting DMARC enabled
45 should both provide the file and set the option.
46 Also enforce no DMARC verification for command-line sourced messages.
48 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
49 could, depending on the platform, hang at the STARTTLS response.
51 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
52 message on a connection. Previously if one message had ARC headers and
53 the following one did not, a crash could result when adding an
54 Authentication-Results: header.
56 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
57 Exim main code and Exim-related utities. The introduction of taint
58 tracking also did many adjustments to string handling. Since then, eximon
59 frequently terminated with an assert failure.
61 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
62 check for 452 responses. This slightly helps the inefficieny of doing
63 a large alias-expansion into a recipient-limited target. The max_rcpt
64 transport option still applies (and at the current default, will override
65 the new feature). The check is done for either cause of synch, and forces
66 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
67 connection. The new facility is not tunable at this time.
69 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
70 library live data was being used, so the results became garbage. Make
71 copies while it is still usable.
73 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
74 on delivery deferred (==) and failed (**) lines (if a delivery was
75 attemtped). Previously it was only on completion (=>) lines.
77 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
78 for the expansion of the server_scram_iter and server_scram_salt options.
80 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
81 are now specifically given a NO_DATA response without hitting the system
82 resolver. The library goes on to do the now-standard TXT lookup.
83 Use of dnsdb lookups is not affected.
85 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
86 only retrieve the errormessage once. Previously two calls to dlerror()
87 were used, and the second one (for mainlog/paniclog) retrieved null
90 JH/20 Taint checking: disallow use of tainted data for
91 - the appendfile transport file and directory options
92 - the pipe transport command
93 - the autoreply transport file, log and once options
94 - file names used by the redirect router (including filter files)
95 Previously this was permitted.
101 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
102 side, to decode a TLS 1.3 packet capture.
104 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
105 Previously the default library behaviour applied, sending two, each in
108 JH/03 Debug output for ACL now gives the config file name and line number for
111 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
113 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
115 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
116 buffer overrun for (non-chunking) other transports.
118 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
119 TLS1.3, means that a server rejecting a client certificate is not visible
120 to the client until the first read of encrypted data (typically the
121 response to EHLO). Add detection for that case and treat it as a failed
122 TLS connection attempt, so that the normal retry-in-clear can work (if
123 suitably configured).
125 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
126 and/or domain. Found and fixed by Jason Betts.
128 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
129 configuration). If a CNAME target was not a wellformed name pattern, a
132 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
133 the OS reports them interleaved with other addresses.
135 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
136 used both for input and for a verify callout, both encrypted, SMTP
137 responses being sent by the server could be lost. This resulted in
138 dropped connections and sometimes bounces generated by a peer sending
141 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
142 string. Previously it was possible to cause undefined behaviour in a
143 library routine (usually a crash). Found by "zerons".
145 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
148 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
149 API was removed, so update to use the newer ones.
151 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
152 any timeout set, is taking a long time. Previously we would hang on to a
153 rotated logfile "forever" if the input was arriving with long gaps
154 (a previous attempt to fix addressed lack, for a long time, of initial
157 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
158 shared (NFS) environment. The length of the tempfile name is now
159 4 + 16 ("hdr.$message_exim_id") which might break on file
160 systems which restrict the file name length to lower values.
163 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
164 shared (NFS) environment.
166 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
167 did for all versions <4.90). Notably -M, -m, --invert, -I may be
170 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
171 on some platforms for bit 31.
173 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
174 to changes apparently associated with TLS1.3 handling some of the APIs
175 previously used were either nonfunctional or inappropriate. Strings
176 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
177 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
178 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
179 This affects log line X= elements, the $tls_{in,out}_cipher variables,
180 and the use of specific cipher names in the encrypted= ACL condition.
182 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
184 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
185 verification result was not updated unless hosts_require_ocsp applied.
187 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
188 queue_list_requires_admin set to false, non-admin users were denied the
191 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
192 directory-of-certs mode. Previously they were advertised despite the
195 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
196 A single TCP connection by a client will now hold a TLS connection open
197 for multiple message deliveries, by default. Previoud the default was to
200 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
201 default. If built with the facility, DANE will be used. The facility
202 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
204 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
205 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
206 must be defined and you must still, unless you define DISABLE_TLS, manage
207 the the include-dir and library-file requirements that go with that
208 choice. Non-TLS builds are still supported.
210 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
213 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
214 default. If the platform supports and has the facility enabled, it will
215 be requested on all coneections.
217 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
218 controlled by the build-time option SUPPORT_PIPE_CONNECT.
220 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
222 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
223 success-DSN messages. Previously the From: header was always the default
224 one for these; the option was ignored.
226 JH/28 Fix the timeout on smtp response to apply to the whole response.
227 Previously it was reset for every read, so a teergrubing peer sending
228 single bytes within the time limit could extend the connection for a
229 long time. Credit to Qualsys Security Advisory Team for the discovery.
231 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
232 delivery address, which leaked information of the results of local
233 forwarding. Change to the original envelope recipient address, per
236 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
237 requested. Previously not bounce was generated and a log entry of
238 error ignored was made.
240 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
242 JH/32 Introduce a general tainting mechanism for values read from the input
243 channel, and values derived from them. Refuse to expand any tainted
244 values, to catch one form of exploit.
246 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
247 was unused and the unexpanded text used for the test. Found and
248 fixed by Ruben Jenster.
250 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
251 an attempt to use a TLS library read routine dereffed a nul pointer,
254 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
255 them in our smtp response.
257 JH/36 Have the general router option retry_use_local_part default to true when
258 any of the restrictive preconditions are set (to anything). Previously it
259 was only for check_local user. The change removes one item of manual
260 configuration which is required for proper retries when a remote router
261 handles a subset of addresses for a domain.
263 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
264 link count into consideration.
266 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
267 caused the extension of big_buffer, the following lines were ignored.
269 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
270 accordance with RFC 2308. Previously there was no expiry, so a longlived
271 receive process (eg. due to ACL delays) versus a short SOA value could
274 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
276 JH/39 Promote DMARC support to mainline.
278 JH/40 Bug 2452: Add a References: header to DSNs.
280 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
281 parameters. The relevant library call is documented as "Deprecated: This
282 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
283 3.6.0, DH parameters are negotiated following RFC7919."
285 HS/06 Change the default of dnssec_request_domains to "*"
287 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
288 carried on and emitted a BDAT command, even when PIPELINING was not
291 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
292 buffer was used for the filename, resulting in a trap when tainted
293 arguments (eg. $domain) were used.
295 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
296 recommended to avoid a possible server-load attack. The feature can be
297 re-enabled via the openssl_options main cofiguration option.
299 JH/45 local_scan API: documented the current smtp_printf() call. This changed
300 for version 4.90 - adding a "more data" boolean to the arguments.
301 Bumped the ABI version number also, this having been missed previously;
302 release versions 4.90 to 4.92.3 inclusive were effectively broken in
303 respect of usage of smtp_printf() by either local_scan code or libraries
304 accessed via the ${dlfunc } expansion item. Both will need coding
305 adjustment for any calls to smtp_printf() to match the new function
306 signature; a FALSE value for the new argument is always safe.
308 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
309 the file-offset (which the Linux syscall does, and exim expects); this
310 resulted in an indefinite loop.
312 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
313 to do ARC verification. The Authentication-Results: header line added
314 by the configuration then had no ARC item.
320 JH/01 Remove code calling the customisable local_scan function, unless a new
321 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
323 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
324 non-signal-safe functions being used.
326 JH/03 Bug 2269: When presented with a received message having a stupidly large
327 number of DKIM-Signature headers, disable DKIM verification to avoid
328 a resource-consumption attack. The limit is set at twenty.
330 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
331 report of oldest_pass in ${authres } in consequence, and separate out
332 some descriptions of reasons for verification fail.
334 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
335 files in the spool were present and unlocked. A queue-runner could spot
336 them, resulting in a duplicate delivery. Fix that by doing the unlock
337 after the unlink. Investigation by Tim Stewart. Take the opportunity to
338 add more error-checking on spoolfile handling while that code is being
341 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
342 No known attacks, no CVE, this is defensive hardening.
344 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
345 a queue-runner could start a delivery while other operations were ongoing.
346 Cutthrough delivery was a common victim, resulting in duplicate delivery.
347 Found and investigated by Tim Stewart. Fix by using the open message data
348 file handle rather than opening another, and not locally closing it (which
349 releases a lock) for that case, while creating the temporary .eml format
350 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
352 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
353 $sender_verify_failure/$recipient_verify_failure to "random".
355 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
358 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
359 Previously this would segfault.
361 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
364 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
365 like zero, since the resolver should be doing this for us, But we need one
366 as a CNAME but no MX presence gets the CNAME returned; we need to check
367 that doesn't point to an MX to declare it "no MX returned" rather than
368 "error, loop". A new main option is added so the older capability of
369 following some limited number of chain links is maintained.
371 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
373 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
374 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
375 now-deprecated earlier definitions used only specified the range up to TLS
376 1.2 (in the older-version library docs).
378 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
380 JH/15 Rework TLS client-side context management. Stop using a global, and
381 explicitly pass a context around. This enables future use of TLS for
382 connections to service-daemons (eg. malware scanning) while a client smtp
383 connection is using TLS; with cutthrough connections this is quite likely.
385 JH/16 Fix ARC verification to do AS checks in reverse order.
387 JH/17 Support a "tls" option on the ${readsocket } expansion item.
389 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
390 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
391 Previously the "utf8" would be re-prepended for every additional message.
393 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
394 Previously thery were accepted, resulting in issues when attempting to
395 forward messages to a non-supporting MTA.
397 PP/02 Let -n work with printing macros too, not just options.
399 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
400 one parent address was copied, and bogus data was used at delivery-logging
401 time. Either a crash (after delivery) or bogus log data could result.
402 Discovery and analysis by Tim Stewart.
404 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
405 Previously if the string ended mid-character, we did not insert the
406 promised '?' replacement.
408 PP/04 Documentation: current string operators work on bytes, not codepoints.
410 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
411 should pack well giving a smaller memory footprint so better caching and
412 therefore performance. Group the declarations where this can't be done so
413 that the byte-sized flag variables are not interspersed among pointer
414 variables, giving a better chance of good packing by the compiler.
416 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
417 non-null, to avoid issues with sites running BATV. Previously reports were
418 sent with an empty envelope sender so looked like bounces.
420 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
421 The ignore_error flag wasn't being returned from the filter subprocess so
422 was not set for later routers. Investigation and fix by Matthias Kurz.
424 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
425 and a msg:complete for the whole, when a message is manually removed using
426 -Mrm. Developement by Matthias Kurz, hacked on by JH.
428 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
429 a "Gnu special" function, asprintf() in the DB utility binary builds; I
430 hope that is portable enough.
432 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
433 requiring a known-CA anchor certificate; make it now rely entirely on the
434 TLSA as an anchor. Checking the name on the leaf cert against the name
435 on the A-record for the host is still done for TA (but not for EE mode).
437 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
438 included in delivery lines for non-proxied connections, when compiled with
439 SUPPORT_SOCKS and running with proxy logging enabled.
441 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
442 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
443 move the existing event to fire before the normal logging of message
444 failure so that custom logging is bracketed by normal logging.
446 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
447 msg:fail:internal event. Developement by Matthias Kurz.
449 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
450 far too small for todays use of crypto signatures stored there. Go all
451 the way to the max DNS message size of 64kB, even though this might be
452 overmuch for IOT constrained device use.
454 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
455 copy a string over itself. The library routine is documented as not
456 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
458 JH/32 For main options check_spool_space and check_inode_space, where the
459 platform supports 64b integers, support more than the previous 2^31 kB
460 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
461 the previous G, M, k.
463 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
464 $authenticated_fail_id variable on authentication failure. Previously
467 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
468 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
469 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
470 GNUTLS_SEC_PARAM_MEDIUM.
472 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
473 side. Previously we would continue as if no SNI had been received.
475 JH/36 Harden the handling of string-lists. When a list consisted of a sole
476 "<" character, which should be a list-separator specification, we walked
477 off past the nul-terimation.
479 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
480 causes) even when the retry time is not yet met. Previously they were
481 not, meaning that when (say) an account was over-quota and temp-rejecting,
482 and multiple senders' messages were queued, only one sender would get
483 notified on each configured delay_warning cycle.
485 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
487 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
488 cipher-suites, an error can be left on the stack even for a succeeding
489 accept; this results in impossible error messages when a later operation
492 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
493 return error codes indicating retry. Under TLS1.3 this becomes required.
495 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
496 it only wrote the new authenticators, resulting in a lack of tracking of
497 peer changes of ESMTP extensions until the next cache flush.
499 JH/41 Fix the loop reading a message header line to check for integer overflow,
500 and more-often against header_maxsize. Previously a crafted message could
501 induce a crash of the recive process; now the message is cleanly rejected.
503 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
504 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
510 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
511 When redis_servers is set to a list of > 1 element, and the Redis servers
512 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
513 case of MOVED into a DEFER case instead, thus moving the query onto the
514 next server in the list. For a cluster of N elements, all N servers must
515 be defined in redis_servers.
517 GF/02 Catch and remove uninitialized value warning in exiqsumm
518 Check for existence of @ARGV before looking at $ARGV[0]
520 JH/01 Replace the store_release() internal interface with store_newblock(),
521 which internalises the check required to safely use the old one, plus
522 the allocate and data copy operations duplicated in both (!) of the
523 extant use locations.
525 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
526 modifier. This matches the restriction on the commandline.
528 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
529 Previously only the last row was returned.
531 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
532 we assumed that tags in the header were well-formed, and parsed the
533 element content after inspecting only the first char of the tag.
534 Assumptions at that stage could crash the receive process on malformed
537 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
538 While running the DKIM ACL we operate on the Permanent memory pool so that
539 variables created with "set" persist to the DATA ACL. Also (at any time)
540 DNS lookups that fail create cache records using the Permanent pool. But
541 expansions release any allocations made on the current pool - so a dnsdb
542 lookup expansion done in the DKIM ACL releases the memory used for the
543 DNS negative-cache, and bad things result. Solution is to switch to the
544 Main pool for expansions.
545 While we're in that code, add checks on the DNS cache during store_reset,
546 active in the testsuite.
547 Problem spotted, and debugging aided, by Wolfgang Breyha.
549 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
550 When none of the hosts presented to a transport match an already-open
551 connection, close it and proceed with the list. Previously we would
552 queue the message. Spotted by Lena with Yahoo, probably involving
555 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
556 Previously a spurious "250 OK id=" response was appended to the proper
559 JH/08 The "support for" informational output now, which built with Content
560 Scanning support, has a line for the malware scanner interfaces compiled
561 in. Interface can be individually included or not at build time.
563 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
564 by the template makefile "src/EDITME". The "STREAM" support for an older
565 ClamAV interface method is removed.
567 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
568 rows affected is given instead).
570 JH/11 The runtime Berkeley DB library version is now additionally output by
571 "exim -d -bV". Previously only the compile-time version was shown.
573 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
574 SMTP connection. Previously, when one had more receipients than the
575 first, an abortive onward connection was made. Move to full support for
576 multiple onward connections in sequence, handling cutthrough connection
577 for all multi-message initiating connections.
579 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
580 routers. Previously, a multi-recipient message would fail to match the
581 onward-connection opened for the first recipient, and cause its closure.
583 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
584 a timeout on read on a GnuTLS initiating connection, resulting in the
585 initiating connection being dropped. This mattered most when the callout
586 was marked defer_ok. Fix to keep the two timeout-detection methods
589 JH/15 Relax results from ACL control request to enable cutthrough, in
590 unsupported situations, from error to silently (except under debug)
591 ignoring. This covers use with PRDR, frozen messages, queue-only and
594 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
596 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
597 metadata, resulting in a crash in free().
599 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
600 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
601 Broken also in d185889f4, with init system revamp.
603 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
604 Previously we abruptly closed the connection after reading a malware-
605 found indication; now we go on to read the "scan ok" response line,
608 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
609 ACL. Previously, a crash would result.
611 JH/19 Speed up macro lookups during configuration file read, by skipping non-
612 macro text after a replacement (previously it was only once per line) and
613 by skipping builtin macros when searching for an uppercase lead character.
615 JH/20 DANE support moved from Experimental to mainline. The Makefile control
616 for the build is renamed.
618 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
619 was allocated for every new TLS startup, meaning one per message. Fix
620 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
622 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
623 reported the original. Fix to report (as far as possible) the ACL
624 result replacing the original.
626 JH/23 Fix memory leak during multi-message connections using STARTTLS under
627 OpenSSL. Certificate information is loaded for every new TLS startup,
628 and the resources needed to be freed.
630 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
632 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
635 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
636 DATA response info to the (existing) per-recipient response info for
637 the "C=" log element. It can have useful tracking info from the
638 destination system. Patch from Simon Arlott.
640 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
641 length value. Previously this would segfault.
643 HS/02 Support Avast multiline protoocol, this allows passing flags to
644 newer versions of the scanner.
646 JH/28 Ensure that variables possibly set during message acceptance are marked
647 dead before release of memory in the daemon loop. This stops complaints
648 about them when the debug_store option is enabled. Discovered specifically
649 for sender_rate_period, but applies to a whole set of variables.
650 Do the same for the queue-runner and queue-list loops, for variables set
651 from spool message files. Do the same for the SMTP per-message loop, for
652 certain variables indirectly set in ACL operations.
654 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
655 as a multi-recipient message from a mailinglist manager). The coding had
656 an arbitrary cutoff number of characters while checking for more input;
657 enforced by writing a NUL into the buffer. This corrupted long / fast
658 input. The problem was exposed more widely when more pipelineing of SMTP
659 responses was introduced, and one Exim system was feeding another.
660 The symptom is log complaints of SMTP syntax error (NUL chars) on the
661 receiving system, and refused recipients seen by the sending system
662 (propating to people being dropped from mailing lists).
663 Discovered and pinpointed by David Carter.
665 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
666 replaced by the ${authresults } expansion.
668 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
670 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
671 allows proper process termination in container environments.
673 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
674 Previously the "final dot" had a newline after it; ensure it is CR,LF.
676 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
677 and "err_perm", deprecated since 4.83 when the RFC-defined words
678 "temperror" and "permerror" were introduced.
680 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
681 transport-filters or DKIM-signing. The restriction was lost in the
682 consolidation of verify-callout and delivery SMTP handling.
683 Extend the restriction to also cover ARC-signing.
685 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
686 in defer=pass mode supply a 450 to the initiator. Previously the message
689 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
690 tls_require_ciphers is used as before.
692 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
693 "pass_unscanned". Only tmpfails from the scanner are written to
694 the paniclog, as they may require admin intervention (permission
695 denied, license issues). Other scanner errors (like decompression
696 bombs) do not cause a paniclog entry.
698 JH/36 Fix reinitialisation of DKIM logging variable between messages.
699 Previously it was possible to log spurious information in receive log
702 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
703 triggered odd behaviour from Outlook Express clients.
705 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
708 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
709 since the IETF WG has not yet settled on that versus the original
710 "bare" representation.
712 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
713 Previously the millisecond value corrupted the output.
714 Fix also for syslog_pid=no and log_selector +pid, for which the pid
715 corrupted the output.
721 JH/01 Rework error string handling in TLS interface so that the caller in
722 more cases is responsible for logging. This permits library-sourced
723 string to be attached to addresses during delivery, and collapses
724 pairs of long lines into single ones.
726 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
727 during configuration. Wildcards are allowed and expanded.
729 JH/02 Rework error string handling in DKIM to pass more info back to callers.
730 This permits better logging.
732 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
733 do not close it down and have the child transport start it up again on
734 the passed-on TCP connection. Instead, proxy the child (and any
735 subsequent ones) for TLS via a unix-domain socket channel. Logging is
736 affected: the continued delivery log lines do not have any DNSSEC, TLS
737 Certificate or OCSP information. TLS cipher information is still logged.
739 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
740 identical IP addresses on different listening ports. Will also affect
743 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
744 add noisy ifdef guards to special-case this sillyness.
745 Patch from Bernd Kuhls.
747 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
748 than 255 are no longer allowed.
750 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
751 Disable the session-cache too, which might reduce our load. Since we
752 currrectly use a new context for every connection, both as server and
753 client, there is no benefit for these.
754 GnuTLS appears to not support tickets server-side by default (we don't
755 call gnutls_session_ticket_enable_server()) but client side is enabled
756 by default on recent versions (3.1.3 +) unless the PFS priority string
759 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
760 <https://reproducible-builds.org/specs/source-date-epoch/>.
762 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
763 the check for any unsuccessful recipients did not notice the limit, and
764 erroneously found still-pending ones.
766 JH/08 Pipeline CHUNKING command and data together, on kernels that support
767 MSG_MORE. Only in-clear (not on TLS connections).
769 JH/09 Avoid using a temporary file during transport using dkim. Unless a
770 transport-filter is involved we can buffer the headers in memory for
771 creating the signature, and read the spool data file once for the
772 signature and again for transmission.
774 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
775 4.77 as the kernel support then wasn't solid, having issues in 64bit
776 mode. Now, it's been long enough. Add support for FreeBSD also.
778 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
779 case where the routing stage had gathered several addresses to send to
780 a host before calling the transport for the first, we previously failed
781 to close down TLS in the old transport process before passing the TCP
782 connection to the new process. The new one sent a STARTTLS command
783 which naturally failed, giving a failed delivery and bloating the retry
784 database. Investigation and fix prototype from Wolfgang Breyha.
786 JH/12 Fix check on SMTP command input synchronisation. Previously there were
787 false-negatives in the check that the sender had not preempted a response
788 or prompt from Exim (running as a server), due to that code's lack of
789 awareness of the SMTP input buffering.
791 PP/04 Add commandline_checks_require_admin option.
792 Exim drops privileges sanely, various checks such as -be aren't a
793 security problem, as long as you trust local users with access to their
794 own account. When invoked by services which pass untrusted data to
795 Exim, this might be an issue. Set this option in main configuration
796 AND make fixes to the calling application, such as using `--` to stop
799 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
800 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
801 responses to those, into a single TLS record each way (this usually means
802 a single packet). As a side issue, smtp_enforce_sync now works on TLS
805 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
806 affects you only if you're dancing at the edge of the param size limits.
807 If you are, and this message makes sense to you, then: raise the
808 configured limit or use OpenSSL 1.1. Nothing we can do for older
811 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
812 cmdline element to get the documented default one. Previously it was
815 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
816 are unsuable for non-message-specific reasons - eg. connection timeout,
817 banner-time rejection.
819 JH/16 Fix logging of delivery remote port, when specified by router, under
822 PP/06 Repair manualroute's ability to take options in any order, even if one
823 is the name of a transport.
826 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
828 JH/17 Change the list-building routines interface to use the expanding-string
829 triplet model, for better allocation and copying behaviour.
831 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
832 Previously it was constructed the first time a possibly-matching string
833 was met in the configuration file input during startup; now it is done
836 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
837 compatible one, to avoid the (poorly documented) possibility of a config
838 file in the working directory redirecting the DB files, possibly correpting
839 some existing file. CVE-2017-10140 assigned for BDB.
841 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
842 cache-hot. Previously, although the result was properly cached, the
843 initial verify call returned a defer.
845 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
846 the main verify for receipient in uncached-mode.
848 JH/22 Retire historical build files to an "unsupported" subdir. These are
849 defined as "ones for which we have no current evidence of testing".
851 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
852 if present. Previously it was ignored.
854 JH/24 Start using specified-initialisers in C structure init coding. This is
855 a C99 feature (it's 2017, so now considered safe).
857 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
858 if was a fixed-sized field and bitmask ops via macros; it is now more
861 PP/07 GitHub PR 56: Apply MariaDB build fix.
862 Patch provided by Jaroslav Škarvada.
864 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
865 during Coverity cleanups [4.87 JH/47]
866 Diagnosis and fix provided by Michael Fischer v. Mollard.
868 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
869 the right size to place the terminating semicolon on its own folded
870 line, the header hash was calculated to an incorrect value thanks to
871 the (relaxed) space the fold became.
873 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
874 and confused the parent.
876 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
877 which could crash as a result. This could lead to undeliverable messages.
879 JH/28 Logging: "next input sent too soon" now shows where input was truncated
882 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
883 matters on fast-turnover and PID-randomising systems, which were getting
884 out-of-order delivery.
886 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
887 a possibly-overlapping copy. The symptom was that "Remote host closed
888 connection in response to HELO" was logged instead of the actual 4xx
891 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
892 Previously only that bufferd was discarded, resulting in SYMTP command
895 JH/32 DKIM: when a message has multiple signatures matching an identity given
896 in dkim_verify_signers, run the dkim acl once for each. Previously only
897 one run was done. Bug 2189.
899 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
900 "panic the current process" to "deliberately defer". The panic log is
901 still written with the problem list name; the mail and reject logs now
902 get a temp-reject line for the message that was being handled, saying
903 something like "domains check lookup or other defer". The SMTP 451
904 message is still "Temporary local problem".
906 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
907 A crafted sequence of BDAT commands could result in in-use memory beeing
908 freed. CVE-2017-16943.
910 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
911 from SMTP input. Previously it was always done; now only done for DATA
912 and not BDAT commands. CVE-2017-16944.
914 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
915 to the message (such as an overlong header line). Previously this was
916 not done and we did not exit BDAT mode. Followon from the previous item
917 though a different problem.
923 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
924 than -2003 did; needs libidn2 in addition to libidn.
926 JH/02 The path option on a pipe transport is now expanded before use.
928 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
929 Patch provided by "Björn", documentation fix added too.
931 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
932 missing a wire-to-host endian conversion.
934 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
935 close after a BDAT command line could be taken as a following command,
936 giving a synch failure. Fix by only checking for synch immediately
937 before acknowledging the chunk.
939 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
940 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
941 macro. Patches provided by Josh Soref.
943 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
944 Previously we did not; the RFC seems ambiguous and VRFY is not listed
945 by IANA as a service extension. However, John Klensin suggests that we
948 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
949 the dkim code may be unix-mode line endings rather than smtp wire-format
950 CRLF, so prepend a CR to any bare LF.
952 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
953 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
955 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
956 the first were themselves being wrongly included in the feed into dkim
957 processing; with most chunk sizes in use this resulted in an incorrect
958 body hash calculated value.
960 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
961 DKIM signature block, for verification. Although advised against by
962 standards it is specifically not ruled illegal.
964 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
966 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
967 missing a body hash (the bh= tag).
969 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
970 It seems that HAProxy sends the Proxy Protocol information in clear and
971 only then does a TLS startup, so do the same.
973 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
974 TCP connections (such as for Spamd) unless the daemon successfully set
975 Fast Open mode on its listening sockets. This fixes breakage seen on
976 too-old kernels or those not configured for Fast Open, at the cost of
977 requiring both directions being enabled for TFO, and TFO never being used
978 by non-daemon-related Exim processes.
980 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
981 endings, at least on the first header line. Try to canonify any that get
982 past that check, despite the cost.
984 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
985 now limited to an arbitrary five deep, while parsing addresses with the
986 strip_excess_angle_brackets option enabled.
988 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
989 instead leave the unprompted TLS handshake in socket buffer for the
990 TLS library to consume.
992 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
994 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
996 JH/16 Drop variables when they go out of scope. Memory management drops a whole
997 region in one operation, for speed, and this leaves assigned pointers
998 dangling. Add checks run only under the testsuite which checks all
999 variables at a store-reset and panics on a dangling pointer; add code
1000 explicitly nulling out all the variables discovered. Fixes one known
1001 bug: a transport crash, where a dangling pointer for $sending_ip_address
1002 originally assigned in a verify callout, is re-used.
1004 PP/06 Drop '.' from @INC in various Perl scripts.
1006 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1008 PP/08 Reduce a number of compilation warnings under clang; building with
1009 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1010 should be warning-free.
1012 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1014 HS/01 Fix portability problems introduced by PP/08 for platforms where
1015 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1017 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1018 chunk. This allows us to accept broken chunked messages. We need a more
1019 general solution here.
1021 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1022 already-broken messages in the queue.
1024 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1026 JH/19 Fix reference counting bug in routing-generated-address tracking.
1032 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1033 supports it and a size is available (ie. the sending peer gave us one).
1035 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1036 years of being deprecated). The replacements are the ACLs
1037 acl_smtp_mime and acl_not_smtp_mime.
1039 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1040 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1041 or even an in-clear connection were permitted. Now, if the host lookup
1042 was dnssec and dane was requested then the host is only used if the
1043 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1044 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1045 if one fails this test.
1046 This means that a poorly-configured remote DNS will make it incommunicado;
1047 but it protects against a DNS-interception attack on it.
1049 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1050 non-noisy when a race steals the message being considered.
1052 JH/05 If main configuration option tls_certificate is unset, generate a
1053 self-signed certificate for inbound TLS connections.
1055 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1056 in rewrites and routers.
1058 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1059 and logged a warning sing 4.83; now they are a configuration file error.
1061 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1062 (lacking @domain). Apply the same qualification processing as RCPT.
1064 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1066 JH/10 Support ${sha256:} applied to a string (as well as the previous
1069 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1070 a cutthrough deliver is pending, as we always want to make a connection.
1071 This also avoids re-routing the message when later placing the cutthrough
1072 connection after a verify cache hit.
1073 Do not update it with the verify result either.
1075 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1076 when routing results in more than one destination address.
1078 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1079 signing (which inhibits the cutthrough capability). Previously only
1080 the presence of an option was tested; now an expansion evaluating as
1081 empty is permissible (obviously it should depend only on data available
1082 when the cutthrough connection is made).
1084 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1085 the relevant preceding SMTP command did not note the pipelining mode.
1087 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1088 Previously they were not counted.
1090 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1091 as one having no matching records. Previously we deferred the message
1092 that needed the lookup.
1094 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1095 distinguished as "(=".
1097 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1098 for missing MX records. Previously it only worked for missing A records.
1100 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1102 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1103 after the data-go-ahead and data-ack. Patch from Jason Betts.
1105 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1106 even for a "none" policy. Patch from Tony Meyer.
1108 JH/22 Fix continued use of a connection for further deliveries. If a port was
1109 specified by a router, it must also match for the delivery to be
1112 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1113 When one of the recipients of a message was unsuitable for the connection
1114 (has no matching addresses), we lost track of needing to mark it
1115 deferred. As a result mail would be lost.
1117 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1119 JH/25 Decoding ACL controls is now done using a binary search; the source code
1120 takes up less space and should be simpler to maintain. Merge the ACL
1121 condition decode tables also, with similar effect.
1123 JH/26 Fix problem with one_time used on a redirect router which returned the
1124 parent address unchanged. A retry would see the parent address marked as
1125 delivered, so not attempt the (identical) child. As a result mail would
1128 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1129 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1130 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1133 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1134 Main config options check_{log,spool}_{inodes,space} are now
1135 100 inodes, 10MB unless set otherwise in the configuration.
1137 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1138 Previously it only applied to the main-section connection policy
1141 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1143 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1144 by me. Added RFC7919 DH primes as an alternative.
1146 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1147 are not in the system include path.
1149 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1150 GnuTLS, when a session startup failed (eg because the client disconnected)
1151 Exim did stdio operations after fclose. This was exposed by a recent
1152 change which nulled out the file handle after the fclose.
1154 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1155 signed directly by the cert-signing cert, rather than an intermediate
1156 OCSP-signing cert. This is the model used by LetsEncrypt.
1158 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1160 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1161 an incoming connection.
1163 HS/02 Bug 1802: Do not half-close the connection after sending a request
1166 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1167 fallback to "prime256v1".
1169 JH/34 SECURITY: Use proper copy of DATA command in error message.
1170 Could leak key material. Remotely exploitable. CVE-2016-9963.
1176 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1177 and 3.4.4 - once the server is enabled to respond to an OCSP request
1178 it does even when not requested, resulting in a stapling non-aware
1179 client dropping the TLS connection.
1181 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1182 support variable-length bit vectors. No functional change.
1184 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1185 The I= interface field on outgoing lines is now after the H= remote
1186 host field, same as incoming lines. There is a separate
1187 outgoing_interface log selector which allows you to disable the
1190 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1191 If not running log_selector +smtp_connection the mainlog would be held
1192 open indefinitely after a "too many connections" event, including to a
1193 deleted file after a log rotate. Leave the per net connection logging
1194 leaving it open for efficiency as that will be quickly detected by the
1195 check on the next write.
1197 HS/01 Bug 1671: Fix post transport crash.
1198 Processing the wait-<transport> messages could crash the delivery
1199 process if the message IDs didn't exist for some reason. When
1200 using 'split_spool_directory=yes' the construction of the spool
1201 file name failed already, exposing the same netto behaviour.
1203 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1204 mime_regex ACL conditions.
1206 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1207 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1208 to HELO, local diagnostic string.
1210 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1211 log line to debug. Even when configured with a tls authenticator many
1212 client connections are expected to not authenticate in this way, so
1213 an authenticate fail is not an error.
1215 HS/02 Add the Exim version string to the process info. This way exiwhat
1216 gives some more detail about the running daemon.
1218 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1219 matter for fast-change records such as DNSBLs.
1221 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1222 retry record, even if constant. There may be multiple transports with
1223 different interface settings and the retry behaviour needs to be kept
1226 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1228 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1230 JH/10 Bug 840: fix log_defer_output option of pipe transport
1232 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1233 hosts_randomize. This matters a lot when combined with mua_wrapper.
1235 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1236 ${quote_pgsql:<string>} operator.
1238 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1240 JH/14 Change header file name for freeradius-client. Relevant if compiling
1241 with Radius support; from the Gentoo tree and checked under Fedora.
1243 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1245 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1246 option transport_filter, meaning no filtering.
1248 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1250 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1251 defaults to "*" (all hosts). The variable is now available when not built
1252 with TLS, default unset, mainly to enable keeping the testsuite sane.
1253 If a server certificate is not supplied (via tls_certificate) an error is
1254 logged, and clients will find TLS connections fail on startup. Presumably
1255 they will retry in-clear.
1256 Packagers of Exim are strongly encouraged to create a server certificate
1257 at installation time.
1259 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1260 with the $config_file variable.
1262 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1263 in transport context, after the attempt, and per-recipient. The latter type
1264 is per host attempted. The event data is the error message, and the errno
1265 information encodes the lookup type (A vs. MX) used for the (first) host,
1266 and the trailing two digits of the smtp 4xx response.
1268 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1269 to write to mainlog (or rejectlog, paniclog) in the window between file
1270 creation and permissions/ownership being changed. Particularly affects
1271 installations where exicyclog is run as root, rather than exim user;
1272 result is that the running daemon panics and dies.
1274 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1276 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1277 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1278 "pri" and "weight". Note that the previous implicit priority given by the
1279 list order is no longer honoured.
1281 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1282 for DKIM processing.
1284 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1285 by defining SUPPORT_SOCKS.
1287 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1288 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1289 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1290 variables are renamed to proxy_{local,external}_{address,port}.
1292 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1293 for a build by defining SUPPORT_I18N
1295 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1296 of the query string, and make ${quote_redis:} do that quoting.
1298 JH/29 Move Events support from Experimental to mainline, enabled by default
1299 and removable for a build by defining DISABLE_EVENT.
1301 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1303 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1304 cached by the daemon.
1306 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1307 by defining LOOKUP_REDIS. The libhiredis library is required.
1309 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1310 keys are given for lookup.
1312 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1313 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1314 only supported when built with TLS support. The PolarSSL SHA routines
1315 are still used when the TLS library is too old for convenient support.
1317 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1318 openssl_options), for security. OpenSSL forces this from version 1.1.0
1319 server-side so match that on older versions.
1321 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1322 allocation for $value could be released as the expansion processing
1323 concluded, but leaving the global pointer active for it.
1325 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1326 and to use the domains and local_parts ACL conditions.
1328 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1329 incorrectly not doubled on cutthrough transmission, hence seen as a
1330 body-termination at the receiving system - resulting in truncated mails.
1331 Commonly the sender saw a TCP-level error, and retransmitted the message
1332 via the normal store-and-forward channel. This could result in duplicates
1333 received - but deduplicating mailstores were liable to retain only the
1334 initial truncated version.
1336 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1338 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1340 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1341 we're in there, support oversigning also; bug 1309.
1343 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1345 HS/04 Add support for keep_environment and add_environment options.
1347 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1348 either intentional arithmetic overflow during PRNG, or testing config-
1351 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1352 delivery resulted in actual delivery. Cancel cutthrough before DATA
1355 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1356 rejects a recipient: pass the reject to the originator.
1358 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1359 Many were false-positives and ignorable, but it's worth fixing the
1362 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1363 for the new environment-manipulation done at startup. Move the routines
1364 from being local to tls.c to being global via the os.c file.
1366 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1367 an extract embedded as result-arg for a map, the first arg for extract
1368 is unavailable so we cannot tell if this is a numbered or keyed
1369 extraction. Accept either.
1375 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1378 JH/02 The smtp transport option "multi_domain" is now expanded.
1380 JH/03 The smtp transport now requests PRDR by default, if the server offers
1383 JH/04 Certificate name checking on server certificates, when exim is a client,
1384 is now done by default. The transport option tls_verify_cert_hostnames
1385 can be used to disable this per-host. The build option
1386 EXPERIMENTAL_CERTNAMES is withdrawn.
1388 JH/05 The value of the tls_verify_certificates smtp transport and main options
1389 default to the word "system" to access the system default CA bundle.
1390 For GnuTLS, only version 3.0.20 or later.
1392 JH/06 Verification of the server certificate for a TLS connection is now tried
1393 (but not required) by default. The verification status is now logged by
1394 default, for both outbound TLS and client-certificate supplying inbound
1397 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1400 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1401 Status Notification (bounce) messages are now MIME format per RFC 3464.
1402 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1403 under the control of the dsn_advertise_hosts option, and routers may
1404 have a dsn_lasthop option.
1406 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1407 default, modifiable by a malware= option. The list separator for
1408 the options can now be changed in the usual way. Bug 68.
1410 JH/10 The smtp_receive_timeout main option is now expanded before use.
1412 JH/11 The incoming_interface log option now also enables logging of the
1413 local interface on delivery outgoing connections.
1415 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1416 if the interface and destination host and port all match.
1418 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1421 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1422 Patch from Andrew Lewis.
1424 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1425 now supports optional time-restrictions, weighting, and priority
1426 modifiers per server. Patch originally by <rommer@active.by>.
1428 JH/16 The spamd_address main option now supports a mixed list of local
1429 and remote servers. Remote servers can be IPv6 addresses, and
1430 specify a port-range.
1432 JH/17 Bug 68: The spamd_address main option now supports an optional
1433 timeout value per server.
1435 JH/18 Bug 1581: Router and transport options headers_add/remove can
1436 now have the list separator specified.
1438 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1441 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1444 JH/21 Support for the A6 type of dns record is withdrawn.
1446 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1447 rather than the verbs used.
1449 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1450 from 255 to 1024 chars.
1452 JH/24 Verification callouts now attempt to use TLS by default.
1454 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1455 are generic router options now. The defaults didn't change.
1457 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1458 Original patch from Alexander Shikoff, worked over by JH.
1460 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1461 files if ZCAT_COMMAND is not executable.
1463 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1465 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1467 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1468 Normally benign, it bites when the pair was led to by a CNAME;
1469 modern usage is to not canonicalize the domain to a CNAME target
1470 (and we were inconsistent anyway for A-only vs AAAA+A).
1472 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1474 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1475 when evaluating $sender_host_dnssec.
1477 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1478 $sender_helo_dnssec variable.
1480 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1482 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1484 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1486 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1487 documented as working, but never had. Support all but $spam_report.
1489 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1490 added for tls authenticator.
1492 HS/03 Add perl_taintmode main config option
1498 TL/01 When running the test suite, the README says that variables such as
1499 no_msglog_check are global and can be placed anywhere in a specific
1500 test's script, however it was observed that placement needed to be near
1501 the beginning for it to behave that way. Changed the runtest perl
1502 script to read through the entire script once to detect and set these
1503 variables, reset to the beginning of the script, and then run through
1504 the script parsing/test process like normal.
1506 TL/02 The BSD's have an arc4random API. One of the functions to induce
1507 adding randomness was arc4random_stir(), but it has been removed in
1508 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1509 function when detected.
1511 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1512 cause callback expansion.
1514 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1515 syntax errors in an expansion can be treated as a string instead of
1516 logging or causing an error, due to the internal use of bool_lax
1517 instead of bool when processing it.
1519 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1520 server certificates when making smtp deliveries.
1522 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1524 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1526 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1528 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1529 Merged patch from Sebastian Wiedenroth.
1531 JH/05 Fix results-pipe from transport process. Several recipients, combined
1532 with certificate use, exposed issues where response data items split
1533 over buffer boundaries were not parsed properly. This eventually
1534 resulted in duplicates being sent. This issue only became common enough
1535 to notice due to the introduction of connection certificate information,
1536 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1538 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1539 size buffer was used, resulting in syntax errors when an expansion
1542 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1543 version 3.3.6 or later.
1545 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1546 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1547 both become "event_action", the variables become $event_name, $event_data
1548 and $event_defer_errno. There is a new variable $verify_mode, usable in
1549 routers, transports and related events. The tls:cert event is now also
1550 raised for inbound connections, if the main configuration event_action
1553 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1554 early OCSP support, but no stapling (appears to be less than 1.0.0).
1556 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1557 server certificate names available under the smtp transport option
1558 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1561 JH/10 Time-related extraction expansions from certificates now use the main
1562 option "timezone" setting for output formatting, and are consistent
1563 between OpenSSL and GnuTLS compilations. Bug 1541.
1565 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1566 encoded parameter in the incoming message. Bug 1558.
1568 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1569 include certificate info, eximon was claiming there were spoolfile
1572 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1574 JH/14 Log delivery-related information more consistently, using the sequence
1575 "H=<name> [<ip>]" wherever possible.
1577 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1578 are problematic for Debian distribution, omit them from the release
1581 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1583 JH/16 Fix string representation of time values on 64bit time_t architectures.
1586 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1587 output list separator was used.
1592 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1593 checkers that were complaining about end of non-void function with no
1596 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1597 This was a regression introduced in 4.83 by another bugfix.
1599 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1601 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1602 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1608 TF/01 Correctly close the server side of TLS when forking for delivery.
1610 When a message was received over SMTP with TLS, Exim failed to clear up
1611 the incoming connection properly after forking off the child process to
1612 deliver the message. In some situations the subsequent outgoing
1613 delivery connection happened to have the same fd number as the incoming
1614 connection previously had. Exim would try to use TLS and fail, logging
1615 a "Bad file descriptor" error.
1617 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1618 utilities have not been installed.
1620 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1621 temporary space as the ACL may create new global variables.
1623 TL/01 LDAP support uses per connection or global context settings, depending
1624 upon the detected version of the libraries at build time.
1626 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1627 to extract and use the src ip:port in logging and expansions as if it
1628 were a direct connection from the outside internet. PPv2 support was
1629 updated based on HAProxy spec change in May 2014.
1631 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1633 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1634 Properly escape header and check for NULL return.
1636 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1639 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1641 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1642 characters in header names, implemented as a verify condition.
1643 Contributed by Michael Fischer v. Mollard.
1645 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1646 results permerror and temperror. Previous values are deprecated but
1647 still accepted. In a future release, err_perm and err_temp will be
1648 completely removed, which will be a backward incompatibility if the
1649 ACL tests for either of these two old results. Patch contributed by
1650 user bes-internal on the mailing list.
1652 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1654 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1655 selectors, in both main and reject logs.
1657 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1660 JH/07 Add malware type "sock" for talking to simple daemon.
1662 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1664 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1665 routers/transports under cutthrough routing.
1667 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1668 numbers. Touch up "bool" conditional to keep the same definition.
1670 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1672 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1674 JH/12 Expand items in router/transport headers_add or headers_remove lists
1675 individually rather than the list as a whole. Bug 1452.
1677 Required for reasonable handling of multiple headers_ options when
1678 they may be empty; requires that headers_remove items with embedded
1679 colons must have them doubled (or the list-separator changed).
1681 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1682 view the policy declared in the DMARC record. Currently, $dmarc_status
1683 is a combined value of both the record presence and the result of the
1686 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1688 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1689 dnslookup router and the smtp transport (applying to the forward
1692 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1693 of ldap servers used for a specific lookup. Patch provided by Heiko
1696 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1697 New variable $lookup_dnssec_authenticated for observability.
1699 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1700 Patch submitted by Lars Timman.
1702 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1704 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1705 Requires trusted mode and valid format message id, aborts otherwise.
1706 Patch contributed by Heiko Schlichting.
1708 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1709 certextract with support for various fields. Bug 1358.
1711 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1712 is requested by default, modifiable by smtp transport option
1715 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1716 operate on certificate variables to give certificate fingerprints
1717 Also new ${sha256:cert_variable}.
1719 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1721 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1722 Christian Aistleitner.
1724 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1726 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1727 file. Patch from Wolfgang Breyha.
1729 JH/25 Expand the coverage of the delivery $host and $host_address to
1730 client authenticators run in verify callout. Bug 1476.
1732 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1733 align with daemon_smtp_ports. Bug 72.
1735 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1736 support and error reporting did not work properly.
1738 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1739 and is readable. Patch from Andrew Colin Kissa.
1741 TL/14 Enhance documentation of ${run expansion and how it parses the
1742 commandline after expansion, particularly in the case when an
1743 unquoted variable expansion results in an empty value.
1745 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1747 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1748 by renaming away from it. Addresses GH issue 15, reported by
1751 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1753 TL/15 SECURITY: prevent double expansion in math comparison functions
1754 (can expand unsanitized data). Not remotely exploitable.
1761 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1763 PP/02 Make -n do something, by making it not do something.
1764 When combined with -bP, the name of an option is not output.
1766 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1769 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1770 $sender_host_name and config options to manage this, and basic check
1773 PP/05 DSCP support for outbound connections and control modifier for inbound.
1775 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1776 (Only plugin which currently uses this is kerberos4, which nobody should
1777 be using, but we should make it available and other future plugins might
1778 conceivably use it, even though it would break NAT; stuff *should* be
1779 using channel bindings instead).
1781 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1782 name; added for Sendmail compatibility; requires admin caller.
1783 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1784 just ignore it); requires trusted caller.
1785 Also parse but ignore: -Ac -Am -X<logfile>
1788 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1790 TL/02 Add +smtp_confirmation as a default logging option.
1792 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1793 Patch by Magnus Holmgren from 2007-02-20.
1795 TL/04 Bugzilla 1281 - Spec typo.
1796 Bugzilla 1283 - Spec typo.
1797 Bugzilla 1290 - Spec grammar fixes.
1799 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1801 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1803 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1804 mailing list by by Dmitry Isaikin.
1806 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1808 JH/02 Support "G" suffix to numbers in ${if comparisons.
1810 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1812 NM/01 Bugzilla 1197 - Spec typo
1813 Bugzilla 1196 - Spec examples corrections
1815 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1817 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1818 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1821 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1822 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1824 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1825 "acl {{name}{arg}...}", and optional args on acl condition
1828 JH/05 Permit multiple router/transport headers_add/remove lines.
1830 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1832 JH/07 Avoid using a waiting database for a single-message-only transport.
1833 Performance patch from Paul Fisher. Bugzilla 1262.
1835 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1838 JH/09 Add $headers_added variable, with content from use of ACL modifier
1839 add_header (but not yet added to the message). Bugzilla 199.
1841 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1842 Pulled from Bugzilla 817 by Wolfgang Breyha.
1844 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1846 (nb: this is the same fix as in Exim 4.80.1)
1848 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1851 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1854 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1856 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1857 advertise SMTP AUTH mechanism to us, instead of a generic
1858 protocol violation error. Also, make Exim more robust to bad
1859 data from the Dovecot auth socket.
1861 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1863 When a queue runner is handling a message, Exim first routes the
1864 recipient addresses, during which it prunes them based on the retry
1865 hints database. After that it attempts to deliver the message to
1866 any remaining recipients. It then updates the hints database using
1869 So if a recipient address works intermittently, it can get repeatedly
1870 deferred at routing time. The retry hints record remains fresh so the
1871 address never reaches the final cutoff time.
1873 This is a fairly common occurrence when a user is bumping up against
1874 their storage quota. Exim had some logic in its local delivery code
1875 to deal with this. However it did not apply to per-recipient defers
1876 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1878 This change adds a proper retry rule check during routing so that the
1879 final cutoff time is checked against the message's age. We only do
1880 this check if there is an address retry record and there is not a
1881 domain retry record; this implies that previous attempts to handle
1882 the address had the retry_use_local_parts option turned on. We use
1883 this as an approximation for the destination being like a local
1884 delivery, as in LMTP.
1886 I suspect this new check makes the old local delivery cutoff check
1887 redundant, but I have not verified this so I left the code in place.
1889 TF/02 Correct gecos expansion when From: is a prefix of the username.
1891 Test 0254 submits a message to Exim with the header
1895 When I ran the test suite under the user fanf2, Exim expanded
1896 the header to contain my full name, whereas it should have added
1897 a Resent-Sender: header. It erroneously treats any prefix of the
1898 username as equal to the username.
1900 This change corrects that bug.
1902 GF/01 DCC debug and logging tidyup
1903 Error conditions log to paniclog rather than rejectlog.
1904 Debug lines prefixed by "DCC: " to remove any ambiguity.
1906 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1908 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1909 Bug spotted by Jeremy Harris; was flawed since initial commit.
1910 Would have resulted in OCSP responses post-SNI triggering an Exim
1911 NULL dereference and crash.
1913 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1915 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1916 Bug detection, analysis and fix by Samuel Thibault.
1917 Bugzilla 1331, Debian bug #698092.
1919 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1921 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1922 Server implementation by Todd Lyons, client by JH.
1923 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1924 config variable "prdr_enable" controls whether the server
1925 advertises the facility. If the client requests PRDR a new
1926 acl_data_smtp_prdr ACL is called once for each recipient, after
1927 the body content is received and before the acl_smtp_data ACL.
1928 The client is controlled by both of: a hosts_try_prdr option
1929 on the smtp transport, and the server advertisement.
1930 Default client logging of deliveries and rejections involving
1931 PRDR are flagged with the string "PRDR".
1933 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1934 fclose(). Diagnosis by Todd Lyons.
1936 PP/17 Update configure.default to handle IPv6 localhost better.
1937 Patch by Alain Williams (plus minor tweaks).
1940 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1941 This is now consistent with GnuTLS, and is now documented: the
1942 previous undocumented portable approach to treating the option as
1943 unset was to force an expansion failure. That still works, and
1944 an empty string is now equivalent.
1946 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1947 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1948 not performing validation itself.
1950 PP/20 Added force_command boolean option to pipe transport.
1951 Patch from Nick Koston, of cPanel Inc.
1953 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1956 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1958 PP/21 Fix eximon continuous updating with timestamped log-files.
1959 Broken in a format-string cleanup in 4.80, missed when I repaired the
1960 other false fix of the same issue.
1961 Report and fix from Heiko Schlichting.
1964 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1965 Report from Prashanth Katuri.
1967 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1968 It's SecureTransport, so affects any MacOS clients which use the
1969 system-integrated TLS libraries, including email clients.
1971 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1972 using a MIME ACL for non-SMTP local injection.
1973 Report and assistance in diagnosis by Warren Baker.
1975 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1977 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1979 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1980 last id that failed so it may be referenced in subsequent ACL's.
1982 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1985 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1986 ldap library initialization, allowing self-signed CA's to be
1987 used. Also properly sets require_cert option later in code by
1988 using NULL (global ldap config) instead of ldap handle (per
1989 session). Bug diagnosis and testing by alxgomz.
1991 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1992 the src/util/ subdirectory.
1994 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1995 renamed to Transport Post Delivery Action by Jeremy Harris, as
1998 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1999 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2000 redis_servers = needs to be configured which will be used by the redis
2001 lookup. Patch from Warren Baker, of The Packet Hub.
2003 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2005 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2006 hostname or reverse DNS when processing a host list. Used suggestions
2007 from multiple comments on this bug.
2009 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2011 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2012 Missed a few lines, added it to make the runtest require no keyboard
2015 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2016 contains upper case chars. Make router use caseful_local_part.
2018 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2019 support when GnuTLS has been built with p11-kit.
2025 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2027 This, or similar/improved, will also be change PP/11 of 4.82.
2033 PP/01 Handle short writes when writing local log-files.
2034 In practice, only affects FreeBSD (8 onwards).
2035 Bugzilla 1053, with thanks to Dmitry Isaikin.
2037 NM/01 Bugzilla 949 - Documentation tweak
2039 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2042 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2044 PP/02 Implemented gsasl authenticator.
2046 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2048 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2049 `pkg-config foo` for cflags/libs.
2051 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2052 with rest of GSASL and with heimdal_gssapi.
2054 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2055 `pkg-config foo` for cflags/libs for the TLS implementation.
2057 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2058 properties get this fed in as external SSF. A number of robustness
2059 and debugging improvements to the cyrus_sasl authenticator.
2061 PP/08 cyrus_sasl server now expands the server_realm option.
2063 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2064 Patch by Jeremy Harris.
2066 PP/10 Added dbmjz lookup type.
2068 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2070 PP/12 MAIL args handles TAB as well as SP, for better interop with
2071 non-compliant senders.
2072 Analysis and variant patch by Todd Lyons.
2074 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2075 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2076 Patch from Dirk Mueller <dmueller@suse.com>
2078 PP/13 tls_peerdn now print-escaped for spool files.
2079 Observed some $tls_peerdn in wild which contained \n, which resulted
2080 in spool file corruption.
2082 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2083 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2084 or write after TLS renegotiation, which otherwise led to messages
2087 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2088 as a tracking header (ie: a signed header comes before the signature).
2089 Patch from Wolfgang Breyha.
2091 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2092 comma-sep list; embedded commas doubled.
2094 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2096 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2098 Report and patch from Dmitry Banschikov.
2100 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2101 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2102 failures. We appear to now support TLS1.1+ with Exim.
2104 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2105 lets Exim select keys and certificates based upon TLS SNI from client.
2106 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2107 before an outbound SMTP session. New log_selector, +tls_sni.
2109 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2110 NULL dereference. Report and patch from Alun Jones.
2112 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2113 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2114 Not seeing resolver debug output on NetBSD, but suspect this is a
2115 resolver implementation change.
2117 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2118 Left warnings. Added "eximon gdb" invocation mode.
2120 PP/21 Defaulting "accept_8bitmime" to true, not false.
2122 PP/22 Added -bw for inetd wait mode support.
2124 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2125 locate the relevant includes and libraries. Made this the default.
2127 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2128 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2130 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2131 This may cause build issues on older platforms.
2133 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2134 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2135 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2136 Added SNI support via GnuTLS too.
2137 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2139 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2141 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2142 Applied second patch from Janne, implementing suggestion to default
2143 multiple-strings-in-record handling to match SPF spec.
2145 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2147 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2148 read-only, out of scope).
2149 Patch from Wolfgang Breyha, report from Stuart Northfield.
2151 PP/29 Fix three issues highlighted by clang analyser static analysis.
2152 Only crash-plausible issue would require the Cambridge-specific
2153 iplookup router and a misconfiguration.
2154 Report from Marcin Mirosław.
2156 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2158 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2159 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2160 As part of this, removing so much warning spew let me fix some minor
2161 real issues in debug logging.
2163 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2164 assignment on my part. Fixed.
2166 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2167 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2168 Janne Snabb (who went above and beyond: thank you).
2170 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2171 string otherwise requires a connection and a bunch more work and it's
2172 relatively easy to get wrong. Should also expose TLS library linkage
2175 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2176 64-bit ${eval} (JH/03).
2178 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2179 GNU libc to support some of the 64-bit stuff, should not lead to
2180 conflicts. Defined before os.h is pulled in, so if a given platform
2181 needs to override this, it can.
2183 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2184 protection layer was required, which is not implemented.
2185 Bugzilla 1254, patch from Wolfgang Breyha.
2187 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2188 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2189 tls_dhparam take prime identifiers. Also unbreak combination of
2190 OpenSSL+DH_params+TLSSNI.
2192 PP/39 Disable SSLv2 by default in OpenSSL support.
2198 PP/01 Solaris build fix for Oracle's LDAP libraries.
2199 Bugzilla 1109, patch from Stephen Usher.
2201 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2203 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2206 TF/02 Fix a couple more cases where we did not log the error message
2207 when unlink() failed. See also change 4.74-TF/03.
2209 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2210 lock up or crash if it happened to be inside a call to libc when it
2211 got a SIGUSR1 from exiwhat.
2213 The SIGUSR1 handler appends the current process status to the process
2214 log which is later printed by exiwhat. It used to use the general
2215 purpose logging code to do this, but several functions it calls are
2216 not safe for signals.
2218 The new output code in the SIGUSR1 handler is specific to the process
2219 log, and simple enough that it's easy to inspect for signal safety.
2220 Removing some special cases also simplifies the general logging code.
2221 Removing the spurious timestamps from the process log simplifies
2224 TF/04 Improved ratelimit ACL condition.
2226 The /noupdate option has been deprecated in favour of /readonly which
2227 has clearer semantics. The /leaky, /strict, and /readonly update modes
2228 are mutually exclusive. The update mode is no longer included in the
2229 database key; it just determines when the database is updated. (This
2230 means that when you upgrade Exim will forget old rate measurements.)
2232 Exim now checks that the per_* options are used with an update mode that
2233 makes sense for the current ACL. For example, when Exim is processing a
2234 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2235 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2236 must specify per_mail/readonly. If you omit the update mode it defaults to
2237 /leaky where that makes sense (as before) or /readonly where required.
2239 The /noupdate option is now undocumented but still supported for
2240 backwards compatibility. It is equivalent to /readonly except that in
2241 ACLs where /readonly is required you may specify /leaky/noupdate or
2242 /strict/noupdate which are treated the same as /readonly.
2244 A useful new feature is the /count= option. This is a generalization
2245 of the per_byte option, so that you can measure the throughput of other
2246 aggregate values. For example, the per_byte option is now equivalent
2247 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2249 The per_rcpt option has been generalized using the /count= mechanism
2250 (though it's more complicated than the per_byte equivalence). When it is
2251 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2252 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2253 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2254 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2255 Note that using per_rcpt with a non-readonly update mode in more than
2256 one ACL will cause the recipients to be double-counted. (The per_mail
2257 and per_byte options don't have this problem.)
2259 The handling of very low rates has changed slightly. If the computed rate
2260 is less than the event's count (usually one) then this event is the first
2261 after a long gap. In this case the rate is set to the same as this event's
2262 count, so that the first message of a spam run is counted properly.
2264 The major new feature is a mechanism for counting the rate of unique
2265 events. The new per_addr option counts the number of different
2266 recipients that someone has sent messages to in the last time period. It
2267 behaves like per_rcpt if all the recipient addresses are different, but
2268 duplicate recipient addresses do not increase the measured rate. Like
2269 the /count= option this is a general mechanism, so the per_addr option
2270 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2271 example, measure the rate that a client uses different sender addresses
2272 with the options per_mail/unique=$sender_address. There are further
2273 details in the main documentation.
2275 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2277 TF/06 Removed a few PCRE remnants.
2279 TF/07 Automatically extract Exim's version number from tags in the git
2280 repository when doing development or release builds.
2282 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2283 Bugzilla 879. Patch from Paul Fisher.
2285 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2286 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2289 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2291 PP/05 Variable $av_failed, true if the AV scanner deferred.
2292 Bugzilla 1078. Patch from John Horne.
2294 PP/06 Stop make process more reliably on build failure.
2295 Bugzilla 1087. Patch from Heiko Schlittermann.
2297 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2298 Bugzilla 1089. Patch from Heiko Schlittermann.
2300 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2301 Bugzilla 1131. Patch from Holger Weiß.
2303 PP/09 Handle IPv6 addresses with SPF.
2304 Bugzilla 860. Patch from Wolfgang Breyha.
2306 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2308 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2311 PP/11 match_* no longer expand right-hand-side by default.
2312 New compile-time build option, EXPAND_LISTMATCH_RHS.
2313 New expansion conditions, "inlist", "inlisti".
2315 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2317 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2319 PP/14 fix log_write() format string regression from TF/03.
2320 Bugzilla 1152. Patch from Dmitry Isaikin.
2326 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2328 PP/02 Harmonised TLS library version reporting; only show if debugging.
2329 Layout now matches that introduced for other libraries in 4.74 PP/03.
2331 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2333 PP/04 New "dns_use_edns0" global option.
2335 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2338 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2339 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2341 TK/01 Updated PolarSSL code to 0.14.2.
2342 Bugzilla 1097. Patch from Andreas Metzler.
2344 PP/07 Catch divide-by-zero in ${eval:...}.
2345 Fixes bugzilla 1102.
2347 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2350 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2351 format-string attack -- SECURITY: remote arbitrary code execution.
2353 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2354 time unintentionally subject to list matching rules, letting the header
2355 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2356 arbitrary string expansion). This allowed for information disclosure.
2358 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2359 INT_MIN/-1 -- value coerced to INT_MAX.
2365 NM/01 Workaround for PCRE version dependency in version reporting
2368 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2369 This fixes portability to compilers other than gcc, notably
2370 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2372 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2373 makefiles for portability to HP-UX and POSIX correctness.
2375 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2376 Also via indented variable definition in the Makefile.
2377 (Debugging by Oliver Heesakkers).
2379 PP/02 Restore caching of spamd results with expanded spamd_address.
2380 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2382 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2383 Improves build reliability. Fix from: Frank Elsner
2385 NM/02 Fix wide character breakage in the rfc2047 coding
2386 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2388 NM/03 Allow underscore in dnslist lookups
2389 Fixes bug 1026. Patch from Graeme Fowler
2391 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2392 Code patches from Adam Ciarcinski of NetBSD.
2394 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2397 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2398 is logged, to avoid truncation. Patch from John Horne.
2400 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2401 Patch from Jakob Hirsch.
2403 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2404 SQL string expansion failure details.
2405 Patch from Andrey Oktyabrski.
2407 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2408 Patch from Simon Arlott.
2410 PP/09 New lookups functionality failed to compile on old gcc which rejects
2411 extern declarations in function scope.
2412 Patch from Oliver Fleischmann
2414 PP/10 Use sig_atomic_t for flags set from signal handlers.
2415 Check getgroups() return and improve debugging.
2416 Fixed developed for diagnosis in bug 927 (which turned out to be
2419 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2420 Patch from Mark Zealey.
2422 PP/12 Bugzilla 1056: Improved spamd server selection.
2423 Patch from Mark Zealey.
2425 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2426 Based on patch from Heiko Schlittermann.
2428 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2429 Patch from Uwe Doering, sign-off by Michael Haardt.
2431 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2432 variable declaration deep within a block. Bug and patch from
2435 PP/15 lookups-Makefile IRIX compatibility coercion.
2437 PP/16 Make DISABLE_DKIM build knob functional.
2439 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2440 Patch by Simon Arlott
2442 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2443 variable argument macros. Our copy now differs from upstream.
2449 TF/01 Failure to get a lock on a hints database can have serious
2450 consequences so log it to the panic log.
2452 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2453 controlled using the smtp_confirmation log selector.
2455 TF/03 Include the error message when we fail to unlink a spool file.
2457 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2458 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2459 for maintaining out-of-tree patches for some time.
2461 PP/01 Bugzilla 139: Documentation and portability issues.
2462 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2463 Handle per-OS dynamic-module compilation flags.
2465 PP/02 Let /dev/null have normal permissions.
2466 The 4.73 fixes were a little too stringent and complained about the
2467 permissions on /dev/null. Exempt it from some checks.
2468 Reported by Andreas M. Kirchwitz.
2470 PP/03 Report version information for many libraries, including
2471 Exim version information for dynamically loaded libraries. Created
2472 version.h, now support a version extension string for distributors
2473 who patch heavily. Dynamic module ABI change.
2475 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2476 privilege escalation vulnerability whereby the Exim run-time user
2477 can cause root to append content of the attacker's choosing to
2480 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2483 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2484 If dropping privileges for untrusted macros, we disabled normal logging
2485 on the basis that it would fail; for the Exim run-time user, this is not
2486 the case, and it resulted in successful deliveries going unlogged.
2487 Fixed. Reported by Andreas Metzler.
2493 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2494 only prepend for the Resent-* case. Fixes regression introduced in
2495 Exim 4.70 by NM/22 for Bugzilla 607.
2497 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2498 increasing numbers of administrators be bitten by this.
2500 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2502 PP/03 Bugzilla 994: added openssl_options main configuration option.
2504 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2506 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2508 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2510 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2511 without a peer certificate, leading to a segfault because of an
2512 assumption that peers always have certificates. Be a little more
2513 paranoid. Problem reported by Martin Tscholak.
2515 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2516 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2517 NB: ClamAV planning to remove STREAM in "middle of 2010".
2518 CL also introduces -bmalware, various -d+acl logging additions and
2519 more caution in buffer sizes.
2521 PP/09 Implemented reverse_ip expansion operator.
2523 PP/10 Bugzilla 937: provide a "debug" ACL control.
2525 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2527 PP/12 Bugzilla 973: Implement --version.
2529 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2531 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2533 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2535 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2536 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2537 ignore trailing whitespace.
2539 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2541 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2544 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2545 Notification from Dr Andrew Aitchison.
2547 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2548 ExtendedDetectionInfo response format.
2549 Notification from John Horne.
2551 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2554 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2555 XSL and documented dependency on system catalogs, with examples of how
2558 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2561 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2562 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2563 configuration file which is writeable by the Exim user or group.
2565 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2566 of configuration files to cover files specified with the -C option if
2567 they are going to be used with root privileges, not just the default
2570 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2571 option (effectively making it always true).
2573 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2574 files to be used while preserving root privileges.
2576 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2577 that rogue child processes cannot use them.
2579 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2580 run-time user, instead of root.
2582 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2583 Exim run-time user without dropping privileges.
2585 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2586 result string, instead of calling string_vformat() twice with the same
2589 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2590 for other users. Others should always drop root privileges if they use
2591 -C on the command line, even for a whitelisted configure file.
2593 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2595 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2601 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2602 $data_path, and $header_path variables; fixed documentation bugs and
2605 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2606 exipick to access non-standard spools, including the "frozen" queue
2609 NM/01 Bugzilla 965: Support mysql stored procedures.
2610 Patch from Alain Williams
2612 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2614 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2615 Patch from Andreas Metzler
2617 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2618 Patch from Kirill Miazine
2620 NM/05 Bugzilla 671: Added umask to procmail example.
2622 JJ/03 installed exipick 20100323.0, fixing doc bug
2624 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2625 directory. Notification and patch from Dan Rosenberg.
2627 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2629 TK/02 Improve log output when DKIM signing operation fails.
2631 MH/01 Treat the transport option dkim_domain as a colon separated
2632 list, not as a single string, and sign the message with each element,
2633 omitting multiple occurences of the same signer.
2635 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2636 Bugzilla 985, 986. Patch by Simon Arlott
2638 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2639 Patch by Simon Arlott
2641 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2642 MBX locking. Notification from Dan Rosenberg.
2648 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2650 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2652 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2654 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2656 NM/04 Bugzilla 915: Flag broken perl installation during build.
2662 TK/01 Added patch by Johannes Berg that expands the main option
2663 "spamd_address" if it starts with a dollar sign.
2665 TK/02 Write list of recipients to X-Envelope-Sender header when building
2666 the mbox-format spool file for content scanning (suggested by Jakob
2669 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2670 (http://www.dcc-servers.net/) support via dccifd. Activated by
2671 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2673 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2674 by Mark Daniel Reidel <mr@df.eu>.
2676 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2677 When building exim an external PCRE library is now needed -
2678 PCRE is a system library on the majority of modern systems.
2679 See entry on PCRE_LIBS in EDITME file.
2681 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2682 conversation. Added nologin parameter to request.
2683 Patch contributed by Kirill Miazine.
2685 TF/01 Do not log submission mode rewrites if they do not change the address.
2687 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2689 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2690 log files in place. Contributed by Roberto Lima.
2692 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2694 TF/03 Bugzilla 615: When checking the local_parts router precondition
2695 after a local_part_suffix or local_part_prefix option, Exim now
2696 does not use the address's named list lookup cache, since this
2697 contains cached lookups for the whole local part.
2699 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2700 Robert Millan. Documentation is in experimental-spec.txt.
2702 TF/04 Bugzilla 668: Fix parallel build (make -j).
2704 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2706 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2707 Patch provided by Jan Srzednicki.
2709 TF/05 Leading white space used to be stripped from $spam_report which
2710 wrecked the formatting. Now it is preserved.
2712 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2713 that they are available at delivery time.
2715 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2717 TF/08 TLS error reporting now respects the incoming_interface and
2718 incoming_port log selectors.
2720 TF/09 Produce a more useful error message if an SMTP transport's hosts
2721 setting expands to an empty string.
2723 NM/06 Bugzilla 744: EXPN did not work under TLS.
2724 Patch provided by Phil Pennock.
2726 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2727 Patch provided by Richard Godbee.
2729 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2730 acl_smtp_notquit, added index entry.
2732 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2733 Patch provided by Eugene Bujak.
2735 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2736 accept(). Patch provided by Maxim Dounin.
2738 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2739 Patch provided by Phil Pennock.
2741 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2743 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2744 Patch provided by Brad "anomie" Jorsch.
2746 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2747 Patch provided by Dean Brooks.
2749 TK/05 Add native DKIM support (does not depend on external libraries).
2751 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2752 Patch provided by Graeme Fowler.
2754 NM/16 Bugzilla 851: Documentation example syntax fix.
2756 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2758 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2761 NM/19 Bugzilla 745: TLS version reporting.
2762 Patch provided by Phil Pennock.
2764 NM/20 Bugzilla 167: bool: condition support.
2765 Patch provided by Phil Pennock.
2767 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2768 clients. Patch provided by Phil Pennock.
2770 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2771 Patch provided by Brad "anomie" Jorsch.
2773 NM/23 Bugzilla 687: Fix misparses in eximstats.
2774 Patch provided by Heiko Schlittermann.
2776 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2777 Patch provided by Heiko Schlittermann.
2779 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2780 plus update to original patch.
2782 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2784 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2785 Patch provided by David Brownlee.
2787 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2789 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2791 NM/30 Bugzilla 888: TLS documentation bugfixes.
2793 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2795 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2796 Unlike the original bugzilla I have changed all shell scripts in src tree.
2798 NM/33 Bugzilla 898: Transport filter timeout fix.
2799 Patch by Todd Rinaldo.
2801 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2802 Patch by Serge Demonchaux.
2804 NM/35 Bugzilla 39: Base64 decode bug fixes.
2805 Patch by Jakob Hirsch.
2807 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2809 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2811 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2813 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2819 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2820 ALT-N's libdkim that I have put here:
2821 http://duncanthrax.net/exim-experimental/
2823 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2824 were called 'true' and it seems that C99 defines that as a reserved
2825 keyword to be used with 'bool' variable types. That means you could
2826 not include C99-style headers which use bools without triggering
2827 build errors in sieve.c.
2829 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2830 as mailq or other aliases. Changed the --help handling significantly
2831 to do whats expected. exim_usage() emits usage/help information.
2833 SC/01 Added the -bylocaldomain option to eximstats.
2835 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2837 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2839 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2845 PH/01 Another patch from the Sieve maintainer.
2847 PH/02 When an IPv6 address is converted to a string for single-key lookup
2848 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2849 dots are used instead of colons so that keys in lsearch files need not
2850 contain colons. This was done some time before quoting was made available
2851 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2852 (notated using the quote facility) so as to distinguish them from IPv4
2853 keys. This meant that lookups for IP addresses in host lists did not work
2854 for iplsearch lookups.
2856 This has been fixed by arranging for IPv6 addresses to be expressed with
2857 colons if the lookup type is iplsearch. This is not incompatible, because
2858 previously such lookups could never work.
2860 The situation is now rather anomalous, since one *can* have colons in
2861 ordinary lsearch keys. However, making the change in all cases is
2862 incompatible and would probably break a number of configurations.
2864 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2867 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2868 conversion specification without a maximum field width, thereby enabling
2869 a rogue spamd server to cause a buffer overflow. While nobody in their
2870 right mind would setup Exim to query an untrusted spamd server, an
2871 attacker that gains access to a server running spamd could potentially
2872 exploit this vulnerability to run arbitrary code as the Exim user.
2874 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2875 $primary_hostname instead of what libspf2 thinks the hosts name is.
2877 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2878 a directory entry by the name of the lookup key. Previously, if a
2879 symlink pointed to a non-existing file or a file in a directory that
2880 Exim lacked permissions to read, a lookup for a key matching that
2881 symlink would fail. Now it is enough that a matching directory entry
2882 exists, symlink or not. (Bugzilla 503.)
2884 PH/03 The body_linecount and body_zerocount variables are now exported in the
2887 PH/04 Added the $dnslist_matched variable.
2889 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2890 This means they are set thereafter only if the connection becomes
2893 PH/06 Added the client_condition to authenticators so that some can be skipped
2894 by clients under certain conditions.
2896 PH/07 The error message for a badly-placed control=no_multiline_responses left
2897 "_responses" off the end of the name.
2899 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2901 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2902 (without spaces) instead of just copying the configuration text.
2904 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2906 PH/11 Added $max_received_linelength.
2908 PH/12 Added +ignore_defer and +include_defer to host lists.
2910 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2911 way in which PCRE > 7.0 is built.
2913 PH/14 Implemented queue_only_load_latch.
2915 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2916 MAIL command. The effect was to mangle the value on 64-bit systems.
2918 PH/16 Another patch from the Sieve maintainer.
2920 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2922 PH/18 If a system quota error occurred while trying to create the file for
2923 a maildir delivery, the message "Mailbox is full" was not appended to the
2924 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2925 only to a quota excession during the actual writing of the file.
2927 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2928 characters?) which causes problems in log lines. The DN values are now
2929 passed through string_printing() before being added to log lines.
2931 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2932 and InterBase are left for another time.)
2934 PH/21 Added message_body_newlines option.
2936 PH/22 Guard against possible overflow in moan_check_errorcopy().
2938 PH/23 POSIX allows open() to be a macro; guard against that.
2940 PH/24 If the recipient of an error message contained an @ in the local part
2941 (suitably quoted, of course), incorrect values were put in $domain and
2942 $local_part during the evaluation of errors_copy.
2948 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2949 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2952 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2953 issue a MAIL command.
2955 PH/02 In an ACL statement such as
2957 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2959 if a client was not listed at all, or was listed with a value other than
2960 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2961 the condition was not true (as it should be), so access was not denied.
2962 The bug was that the ! inversion was incorrectly passed on to the second
2963 item. This has been fixed.
2965 PH/03 Added additional dnslists conditions == and =& which are different from
2966 = and & when the dns lookup returns more than one IP address.
2968 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2969 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2971 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2972 FSYNC, which compiles an option called disable_fsync that allows for
2973 bypassing fsync(). The documentation is heavily laced with warnings.
2975 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2977 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2978 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2979 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2980 including adding "make clean"; (3) Added -fPIC when compiling the test
2981 dynamically loaded module, to get rid of a warning.
2983 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2984 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2985 = 0s. The bug is otherwise harmless.
2987 PH/07 There was a bug in the dovecot authenticator such that the value of
2988 $auth1 could be overwritten, and so not correctly preserved, after a
2989 successful authentication. This usually meant that the value preserved by
2990 the server_setid option was incorrect.
2992 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2994 PH/09 Installed PCRE release 7.0.
2996 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2997 run for batched SMTP input. It is now run at the start of every message
2998 in the batch. While fixing this I discovered that the process information
2999 (output by running exiwhat) was not always getting set for -bs and -bS
3000 input. This is fixed, and it now also says "batched" for BSMTP.
3002 PH/11 Added control=no_pipelining.
3004 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3005 patch, slightly modified), and move the expansion of helo_data till after
3006 the connection is made in the smtp transport (so it can use these
3009 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3011 PH/14 Added log_selector = +pid.
3013 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3015 PH/16 Add ${if forany and ${if forall.
3017 PH/17 Added dsn_from option to vary the From: line in DSNs.
3019 PH/18 Flush SMTP output before performing a callout, unless control =
3020 no_callout_flush is set.
3022 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3023 was true (the default) a successful delivery failed to delete the retry
3024 item, thus causing premature timeout of the address. The bug is now
3027 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3029 PH/21 Long custom messages for fakedefer and fakereject are now split up
3030 into multiline responses in the same way that messages for "deny" and
3031 other ACL rejections are.
3033 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3034 with slight modification.
3036 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3037 draft, changing the syntax and factoring some duplicate code".
3039 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3040 for deliveries of the second and subsequent messages over the same SMTP
3043 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3044 ${reduce, with only minor "tidies".
3046 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3048 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3049 expansion side effects.
3051 PH/27 When a message times out after an over-quota error from an Exim-imposed
3052 quota, the bounce message says "mailbox is full". This message was not
3053 being given when it was a system quota that was exceeded. It now should
3056 MH/03 Made $recipients available in local_scan(). local_scan() already has
3057 better access to the recipient list through recipients_list[], but
3058 $recipients can be useful in postmaster-provided expansion strings.
3060 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3061 in the case of a MAIL command with additional options following the
3062 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3063 were accidentally chopped off.
3065 PH/29 SMTP synchronization checks are implemented when a command is read -
3066 there is a check that no more input is waiting when there shouldn't be
3067 any. However, for some commands, a delay in an ACL can mean that it is
3068 some time before the response is written. In this time, more input might
3069 arrive, invalidly. So now there are extra checks after an ACL has run for
3070 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3071 pipelining has not been advertised.
3073 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3075 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3076 returned in the SMTP response when smtp_return_error_details was false.
3077 This has been fixed.
3079 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3080 instead of the C I/O that was originally supplied, because problems were
3081 reported on Solaris.
3083 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3084 Exim which did not show up earlier: it was assuming that a call to
3085 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3086 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3087 was a macro that became an assignment, so it seemed to work. This has
3088 changed to a proper function call with a void return, hence the compile
3089 error. Exim's code has been fixed.
3091 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3094 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3096 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3098 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3099 because it turns out to be too big or there is a timeout) there is no
3100 "Completed" line in the log. When some messages of this type were
3101 selected by exigrep, they were listed as "not completed". Others were
3102 picked up by some special patterns. I have improved the selection
3103 criteria to be more general.
3105 PH/38 The host_find_failed option in the manualroute router can now be set
3106 to "ignore", to completely ignore a host whose IP address cannot be
3107 found. If all hosts are ignored, the behaviour is controlled by the new
3108 host_all_ignored option.
3110 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3111 homing or because of multiple MX records with /mx) generated more than
3112 one IP address, and the following item turned out to be the local host,
3113 all the secondary addresses of the first item were incorrectly removed
3114 from the list, along with the local host and any following hosts (which
3115 is what is supposed to happen).
3117 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3118 whoever called Exim into the -H file. In the case of the daemon it was
3119 behaving confusingly. When first started, it used values for whoever
3120 started the daemon, but after a SIGHUP it used the Exim user (because it
3121 calls itself on a restart). I have changed the code so that it now always
3124 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3125 message are rejected with the same error (e.g. no authentication or bad
3126 sender address), and a DATA command is nevertheless sent (as can happen
3127 with PIPELINING or a stupid MUA), the error message that was given to the
3128 RCPT commands is included in the rejection of the DATA command. This is
3129 intended to be helpful for MUAs that show only the final error to their
3132 PH/42 Another patch from the Sieve maintainer.
3134 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3135 Eximstats - Fixed some broken HTML links and added missing column headers
3137 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3138 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3140 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3142 PH/43 Yet another patch from the Sieve maintainer.
3144 PH/44 I found a way to check for a TCP/IP connection going away before sending
3145 the response to the final '.' that terminates a message, but only in the
3146 case where the client has not sent further data following the '.'
3147 (unfortunately, this is allowed). However, in many cases there won't be
3148 any further data because there won't be any more messages to send. A call
3149 to select() can be used: if it shows that the input is "ready", there is
3150 either input waiting, or the socket has been closed. An attempt to read
3151 the next input character can distinguish the two cases. Previously, Exim
3152 would have sent an OK response which the client would never have see.
3153 This could lead to message repetition. This fix should cure that, at
3154 least in a lot of common cases.
3156 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3157 advertised in response to EHLO.
3163 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3164 fixed by 4.65/MH/01 (is this a record?) are fixed:
3166 (i) An empty string was always treated as zero by the numeric comparison
3167 operators. This behaviour has been restored.
3169 (ii) It is documented that the numeric comparison operators always treat
3170 their arguments as decimal numbers. This was broken in that numbers
3171 starting with 0 were being interpreted as octal.
3173 While fixing these problems I realized that there was another issue that
3174 hadn't been noticed. Values of message_size_limit (both the global option
3175 and the transport option) were treated as octal if they started with 0.
3176 The documentation was vague. These values are now always treated as
3177 decimal, and I will make that clear in the documentation.
3183 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3184 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3187 MH/01 Don't check that the operands of numeric comparison operators are
3188 integers when their expansion is in "skipping" mode (fixes bug
3189 introduced by 4.64-PH/07).
3191 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3192 child addresses, Exim now panics and dies. Previously, because the count
3193 is held in a short int, deliveries were likely to be lost. As such a
3194 large number of recipients for a single message is ridiculous
3195 (performance will be very, very poor), I have chosen to impose a limit
3196 rather than extend the field.
3202 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3203 leftover -K file (the existence of which was triggered by #402).
3204 While we were at it, introduced process PID as part of the -K
3205 filename. This should rule out race conditions when creating
3208 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3209 processing considerably. Previous code took too long for large mails,
3210 triggering a timeout which in turn triggers #401.
3212 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3213 in the DK code in transports.c. sendfile() is not really portable,
3214 hence the _LINUX specificness.
3216 TF/01 In the add_headers option to the mail command in an Exim filter,
3217 there was a bug that Exim would claim a syntax error in any
3218 header after the first one which had an odd number of characters
3221 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3222 callout verification, Exim cached a "reject" for the entire domain. This
3223 is correct for most verifications, but it is not correct for a recipient
3224 verification with use_sender or use_postmaster set, because in that case
3225 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3226 case of MAIL FROM:<> rejection from other early rejections (e.g.
3227 rejection of HELO). When verifying a recipient using a non-null MAIL
3228 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3229 Whatever the result of the callout, the value of the domain cache is
3230 left unchanged (for any other kind of callout, getting as far as trying
3231 RCPT means that the domain itself is ok).
3233 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3236 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3237 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3238 session, the daemon ignores ECONNECT errors and logs others; it now
3239 ignores EPIPE as well.
3241 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3242 (quoted-printable decoding).
3244 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3245 later the small subsequent patch to fix an introduced bug.
3247 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3249 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3251 PH/08 An error is now given if message_size_limit is specified negative.
3253 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3254 to be given (somewhat) arbitrary names.
3256 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3259 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3260 miscellaneous code fixes
3262 PH/10 Added the log_reject_target ACL modifier to specify where to log
3265 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3266 hostname. This is wrong, because it relates to the incoming message (and
3267 probably the interface on which it is arriving) and not to the outgoing
3268 callout (which could be using a different interface). This has been
3269 changed to use the value of the helo_data option from the smtp transport
3270 instead - this is what is used when a message is actually being sent. If
3271 there is no remote transport (possible with a router that sets up host
3272 addresses), $smtp_active_hostname is used.
3274 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3275 tweaks were necessary in order to get it to work (see also 21 below):
3276 (a) The code assumed that strncpy() returns a negative number on buffer
3277 overflow, which isn't the case. Replaced with Exim's string_format()
3279 (b) There were several signed/unsigned issues. I just did the minimum
3280 hacking in of casts. There is scope for a larger refactoring.
3281 (c) The code used strcasecmp() which is not a standard C function.
3282 Replaced with Exim's strcmpic() function.
3283 (d) The code set only $1; it now sets $auth1 as well.
3284 (e) A simple test gave the error "authentication client didn't specify
3285 service in request". It would seem that Dovecot has changed its
3286 interface. Fortunately there's a specification; I followed it and
3287 changed what the client sends and it appears to be working now.
3289 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3292 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3293 address A is aliased to B and C, where B exists and C does not. Without
3294 -v the output is "A verified" because verification stops after a
3295 successful redirection if more than one address is generated. However,
3296 with -v the child addresses are also verified. Exim was outputting "A
3297 failed to verify" and then showing the successful verification for C,
3298 with its parentage. It now outputs "B failed to verify", showing B's
3299 parentage before showing the successful verification of C.
3301 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3302 look up a TXT record in a specific list after matching in a combined
3305 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3306 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3307 they consult the DNS. I had assumed they would set it the way they
3308 wanted; and indeed my experiments on Linux seem to show that in some
3309 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3310 To be on the safe side, however, I have now made the interface to
3311 host_find_byname() similar to host_find_bydns(), with an argument
3312 containing the DNS resolver options. The host_find_byname() function now
3313 sets these options at its start, just as host_find_bydns() does. The smtp
3314 transport options dns_qualify_single and dns_search_parents are passed to
3315 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3316 of host_find_byname() use the default settings of RES_DEFNAMES
3317 (qualify_single) but not RES_DNSRCH (search_parents).
3319 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3320 spool_read_header() do less string testing, by means of a preliminary
3321 switch on the second character of optional "-foo" lines. (This is
3322 overdue, caused by the large number of possibilities that now exist.
3323 Originally there were few.) While I was there, I also converted the
3324 str(n)cmp tests so they don't re-test the leading "-" and the first
3325 character, in the hope this might squeeze out yet more improvement.
3327 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3328 flag allowing group syntax was set by the header_syntax check but not
3329 turned off, possible causing trouble later; (2) The flag was not being
3330 set at all for the header_verify test, causing "group"-style headers to
3331 be rejected. I have now set it in this case, and also caused header_
3332 verify to ignore an empty address taken from a group. While doing this, I
3333 came across some other cases where the code for allowing group syntax
3334 while scanning a header line wasn't quite right (mostly, not resetting
3335 the flag correctly in the right place). These bugs could have caused
3336 trouble for malformed header lines. I hope it is now all correct.
3338 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3339 with the "reply" argument non-NULL. The code, however (which originally
3340 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3341 but it didn't always do it. This confused somebody who was copying the
3342 code for some other use. I have removed all the tests.
3344 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3345 feature that was used to support insecure browsers during the U.S. crypto
3346 embargo. It requires special client support, and Exim is probably the
3347 only MTA that supported it -- and would never use it because real RSA is
3348 always available. This code has been removed, because it had the bad
3349 effect of slowing Exim down by computing (never used) parameters for the
3350 RSA_EXPORT functionality.
3352 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3353 authenticator to fail if there's a tab character in the incoming data
3354 (there should never be unless someone is messing about, as it's supposed
3355 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3356 if the connection is using TLS or if the remote IP is the same as the
3357 local IP, and the "valid-client-cert option" if a client certificate has
3360 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3361 authenticators. This can be used for authorization after authentication
3362 succeeds. (In the case of plaintext, it servers for both authentication
3365 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3366 if any retry times were supplied.
3368 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3369 connection, where there is no client IP address to check. In this
3370 situation, the verify now always succeeds.
3372 PH/25 Applied John Jetmore's -Mset patch.
3374 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3376 PH/27 In a string expansion for a processed (not raw) header when multiple
3377 headers of the same name were present, leading whitespace was being
3378 removed from all of them, but trailing whitespace was being removed only
3379 from the last one. Now trailing whitespace is removed from each header
3380 before concatenation. Completely empty headers in a concatenation (as
3381 before) are ignored.
3383 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3384 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3386 PH/29 [Removed. This was a change that I later backed out, and forgot to
3387 correct the ChangeLog entry (that I had efficiently created) before
3388 committing the later change.]
3390 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3391 address errors (4xx response to RCPT) over the same connection as other
3392 messages routed to the same hosts. Such deliveries are always "forced",
3393 so retry times are not inspected. This resulted in far too many retries
3394 for the affected addresses. The effect occurred only when there were more
3395 hosts than the hosts_max_try setting in the smtp transport when it had
3396 the 4xx errors. Those hosts that it had tried were not added to the list
3397 of hosts for which the message was waiting, so if all were tried, there
3398 was no problem. Two fixes have been applied:
3400 (i) If there are any address or message errors in an SMTP delivery, none
3401 of the hosts (tried or untried) are now added to the list of hosts
3402 for which the message is waiting, so the message should not be a
3403 candidate for sending over the same connection that was used for a
3404 successful delivery of some other message. This seems entirely
3405 reasonable: after all the message is NOT "waiting for some host".
3406 This is so "obvious" that I'm not sure why it wasn't done
3407 previously. Hope I haven't missed anything, but it can't do any
3408 harm, as the worst effect is to miss an optimization.
3410 (ii) If, despite (i), such a delivery is accidentally attempted, the
3411 routing retry time is respected, so at least it doesn't keep
3412 hammering the server.
3414 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3415 in ${readsocket because some servers need this prod.
3417 PH/32 Added some extra debug output when updating a wait-xxx database.
3419 PH/33 The hint "could be header name not terminated by colon", which has been
3420 given for certain expansion errors for a long time, was not being given
3421 for the ${if def:h_colon_omitted{... case.
3423 PH/34 The spec says: "With one important exception, whenever a domain list is
3424 being scanned, $domain contains the subject domain." There was at least
3425 one case where this was not true.
3427 PH/35 The error "getsockname() failed: connection reset by peer" was being
3428 written to the panic log as well as the main log, but it isn't really
3429 panic-worthy as it just means the connection died rather early on. I have
3430 removed the panic log writing for the ECONNRESET error when getsockname()
3433 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3434 runs only) independently of the message's sender address. This meant
3435 that, if the 4xx error was in fact related to the sender, a different
3436 message to the same recipient with a different sender could confuse
3437 things. In particular, this can happen when sending to a greylisting
3438 server, but other circumstances could also provoke similar problems.
3439 I have changed the default so that the retry time for these errors is now
3440 based a combination of the sender and recipient addresses. This change
3441 can be overridden by setting address_retry_include_sender=false in the
3444 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3445 remote server are returned as part of bounce messages. This was not
3446 happening for LMTP over a pipe (the lmtp transport), but now it is the
3447 same for both kinds of LMTP.
3449 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3450 in header lines that were in fact CNAMEs. This is no longer the case.
3452 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3453 and queue runs started by the daemon processed all messages. This has
3454 been fixed so that -R and -S can now usefully be given with -q<time>.
3456 PH/40 Import PCRE release 6.7 (fixes some bugs).
3458 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3460 PH/42 Give an error if -q is specified more than once.
3462 PH/43 Renamed the variables $interface_address and $interface_port as
3463 $received_ip_address and $received_port, to make it clear that these
3464 values apply to message reception, and not to the outgoing interface when
3465 a message is delivered. (The old names remain recognized, of course.)
3467 PH/44 There was no timeout on the connect() call when using a Unix domain
3468 socket in the ${readsocket expansion. There now is.
3470 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3471 be meaningful with "accept".
3473 SC/01 Eximstats V1.43
3474 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3476 SC/02 Eximstats V1.44
3477 Use a glob alias rather than an array ref in the generated
3478 parser. This improves both readability and performance.
3480 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3481 Collect SpamAssassin and rejection statistics.
3482 Don't display local sender or destination tables unless
3483 there is data to show.
3484 Added average volumes into the top table text output.
3486 SC/04 Eximstats V1.46
3487 Collect data on the number of addresses (recipients)
3488 as well as the number of messages.
3490 SC/05 Eximstats V1.47
3491 Added 'Message too big' to the list of mail rejection
3492 reasons (thanks to Marco Gaiarin).
3494 SC/06 Eximstats V1.48
3495 Mainlog lines which have GMT offsets and are too short to
3496 have a flag are now skipped.
3498 SC/07 Eximstats V1.49 (Alain Williams)
3499 Added the -emptyok flag.
3501 SC/08 Eximstats V1.50
3502 Fixes for obtaining the IP address from reject messages.
3504 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3505 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3506 whitespace changes from 4.64-PH/27
3508 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3511 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3512 are found, allow negative numbers in numeric criteria)
3514 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3516 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3517 to match changes made in 4.64-PH/43
3519 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3521 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3522 "domain" is actually an IP address, and force a failure. This locks out
3523 those revolvers/nameservers that support "A-for-A" lookups, in
3524 contravention of the specifications.
3526 PH/48 When a host name was looked up from an IP address, and the subsequent
3527 forward lookup of the name timed out, the host name was left in
3528 $sender_host_name, contrary to the specification.
3530 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3531 restricted to single-key lookups, Exim was not diagnosing an error if
3532 * or *@ was used with a query-style lookup.
3534 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3536 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3537 long ago, but noone interested enough thought of it. Let's just say that
3538 the "1.1" means that there are some new functions that weren't there at
3539 some point in the past.
3541 PH/51 Error processing for expansion failure of helo_data from an smtp
3542 transport during callout processing was broken.
3544 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3545 tested/used via the -bh/-bhc/-bs options.
3547 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3548 bug, fixed in subsequent PCRE releases).
3550 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3551 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3553 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3559 SC/01 Use a glob alias rather than an array ref in eximstats generated
3560 parser. This improves both readability and performance.
3562 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3563 Don't display local sender or destination tables in eximstats unless
3564 there is data to show.
3565 Added average volumes into the eximstats top table text output.
3567 SC/03 Collect data on the number of addresses (recipients) as well
3568 as the number of messages in eximstats.
3570 TF/01 Correct an error in the documentation for the redirect router. Exim
3571 does (usually) call initgroups() when daemonizing.
3573 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3574 with consistent privilege compared to when running as a daemon.
3576 TF/03 Note in the spec that $authenticated_id is not set for local
3577 submissions from trusted users.
3579 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3580 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3582 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3583 by adding some example configuration directives to the default
3584 configuration file. A little bit of work is required to uncomment the
3585 directives and define how usernames and passwords are checked, but
3586 there is now a framework to start from.
3588 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3589 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3590 without this. I don't know how relevant this is to other LDAP libraries.
3592 PH/02 Add the verb name to the "unknown ACL verb" error.
3594 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3596 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3598 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3599 directory not expanded when it should be if an expanded home directory
3600 was set for the address (which is overridden by the transport).
3602 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3605 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3606 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3607 because it is too late at that time, and has no effect.
3609 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3610 security issue with \' (bugzilla #107). I could not use the
3611 PQescapeStringConn() function, because it needs a PGconn value as one of
3614 PH/08 When testing addresses using -bt, indicate those final addresses that
3615 are duplicates that would not cause an additional delivery. At least one
3616 person was confused, thinking that -bt output corresponded to deliveries.
3617 (Suppressing duplicates isn't a good idea as you lose the information
3618 about possibly different redirections that led to the duplicates.)
3620 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3621 systems where poll() doesn't work, in particular OS X.
3623 PH/10 Added more information to debugging output for retry time not reached.
3625 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3626 operations in malware.c.
3628 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3631 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3632 syslog_duplication set false, log lines that would normally be written
3633 both the the main log and to the reject log were not written to syslog at
3636 PH/14 In the default configuration, change the use of "message" in ACL warn
3637 statements to "add_header".
3639 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3640 not followed by a command (e.g. "seen endif").
3642 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3643 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3646 PH/17 Added extra conditions to the default value of delay_warning_condition
3650 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3651 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3652 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3655 The Auto-Submitted: and various List- headers are standardised, whereas I
3656 don't think Precedence: ever was.
3658 PH/18 Refactored debugging code in route_finduser() to show more information,
3659 in particular, the error code if getpwnam() issues one.
3661 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3662 This is apparently needed in addition to the PH/07 change above to avoid
3663 any possible encoding problems.
3665 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3666 but not after initializing Perl.
3668 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3669 output them only if debugging. By default they are written stderr,
3670 apparently, which is not desirable.
3672 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3675 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3678 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3680 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3681 authenticated or an ident call has been made. Suppress the default
3682 values for $authenticated_id and $authenticated_sender (but permit -oMai
3683 and -oMas) when testing with -bh.
3685 PH/24 Re-jigged the order of the tests in the default configuration so that the
3686 tests for valid domains and recipients precede the DNS black list and CSA
3687 tests, on the grounds that those ones are more expensive.
3689 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3690 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3691 This bug exists in every version of Exim that I still have, right back to
3694 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3695 However, an attempt to turn on case-sensitivity in a regex key by
3696 including (?-i) didn't work because the subject string was already
3697 lowercased, and the effects were non-intuitive. It turns out that a
3698 one-line patch can be used to allow (?-i) to work as expected.
3704 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3705 other effects) broke the use of negated acl sub-conditions.
3707 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3710 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3711 "Deny" causes Exim to reject the incoming connection with a 554 error.
3712 Unfortunately, if there is a major crisis, such as a disk failure,
3713 tcp-wrappers gives "deny", whereas what one would like would be some
3714 kind of temporary error. A kludge has been added to help with this.
3715 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3716 554 error is used if errno is still zero or contains ENOENT (which occurs
3717 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3720 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3722 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3723 errors. Otherwise a message that provokes a temporary error (when other
3724 messages do not) can cause a whole host to time out.
3726 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3727 addresses were routed directly to files or pipes from a redirect router.
3728 File deliveries just didn't batch; pipe deliveries might have suffered
3731 PH/06 A failure to get a lock for a hints database would erroneously always say
3732 "Failed to get write lock", even when it was really a read lock.
3734 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3735 of 0600. This has been changed to use the value of the lockfile_mode
3736 option (which defaults to 0600).
3738 PH/08 Applied small patch from the Sieve maintainer.
3740 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3741 folder from quota calculations, a direct delivery into this folder messed
3742 up the contents of the maildirsize file. This was because the regex was
3743 used only to exclude .Trash (or whatever) when the size of the mailbox
3744 was calculated. There was no check that a delivery was happening into an
3745 excluded directory. This bug has been fixed by ignoring all quota
3746 processing for deliveries into excluded directories.
3748 PH/10 Added the maildirfolder_create_regex option to appendfile.
3754 PH/01 The code for finding all the local interface addresses on a FreeBSD
3755 system running IPv6 was broken. This may well have applied to all BSD
3756 systems, as well as to others that have similar system calls. The broken
3757 code found IPv4 interfaces correctly, but gave incorrect values for the
3758 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3759 that it would not match correctly against @[] and not recognize the IPv6
3762 PH/02 The ipliteral router was not recognizing addresses of the form user@
3763 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3765 PH/03 Added disable_ipv6.
3767 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3768 decoded form, because it is most often used to construct To: headers
3769 lines in autoreplies, and the decoded form may well be syntactically
3770 invalid. However, $reply_address has leading white space removed, and all
3771 newlines turned into spaces so that the autoreply transport does not
3774 PH/05 If group was specified without a user on a router, and no group or user
3775 was specified on a transport, the group from the router was ignored.
3777 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3778 for visible compile-time settings that can be used to change these
3779 numbers, for those that want even more. Backwards compatibility with old
3780 spool files has been maintained. However, going back to a previous Exim
3781 release will lost any variables that are in spool files.
3783 PH/07 Two small changes when running in the test harness: increase delay when
3784 passing a TCP/IP connection to a new process, in case the original
3785 process has to generate a bounce, and remove special handling of
3786 127.0.0.2 (sic), which is no longer necessary.
3788 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3789 be the same on different OS.
3791 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3794 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3795 whether --show-vars was specified or not
3797 JJ/02 exipick: Added support for new ACL variable spool format introduced
3800 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3801 syntactically invalid From: or Reply-to: line, and a filter used this to
3802 generate an autoreply, and therefore failed to obtain an address for the
3803 autoreply, Exim could try to deliver to a non-existent relative file
3804 name, causing unrelated and misleading errors. What now happens is that
3805 it logs this as a hard delivery error, but does not attempt to create a
3808 PH/11 The exinext utility has a -C option for testing purposes, but although
3809 the given file was scanned by exinext itself; it wasn't being passed on
3810 when Exim was called.
3812 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3813 an end-of-file indication when reading a command response.
3815 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3816 compiled. In many other places in Exim, IPv6 addresses are always
3817 recognized, so I have changed this. It also means that IPv4 domain
3818 literals of the form [IPV4:n.n.n.n] are now always recognized.
3820 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3821 used if the router is not running as root, for example, when verifying at
3822 ACL time, or when using -bh. The debugging output from this situation was
3823 non-existent - all you got was a failure to exec. I have made two
3826 (a) Failures to set uid/gid, the current directory, or a process leader
3827 in a subprocess such as that created by queryprogram now generate
3828 suitable debugging output when -d is set.
3830 (b) The queryprogram router detects when it is not running as root,
3831 outputs suitable debugging information if -d is set, and then runs
3832 the subprocess without attempting to change uid/gid.
3834 PH/15 Minor change to Makefile for building test_host (undocumented testing
3837 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3838 additional section of a DNS packet that returns MX or SRV records.
3839 Instead, it always explicitly searches for A/AAAA records. This avoids
3840 major problems that occur when a DNS server includes only records of one
3841 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3842 fixed another bug: if SRV records were looked up and the corresponding
3843 address records were *not* found in the additional section, the port
3844 values from the SRV records were lost.
3846 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3847 using the correct key (the original address) when searching the retry
3848 rules in order to find which one to use for generating the retry hint.
3850 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3851 adding the default one. Similarly, if it contains a Reply-To: header, the
3852 errors_reply_to option, if set, is not used.
3854 PH/19 When calculating a retry time, Exim used to measure the "time since
3855 failure" by looking at the "first failed" field in the retry record. Now
3856 it does not use this if it is later than than the arrival time of the
3857 message. Instead it uses the arrival time. This makes for better
3858 behaviour in cases where some deliveries succeed, thus re-setting the
3859 "first failed" field. An example is a quota failure for a huge message
3860 when small messages continue to be delivered. Without this change, the
3861 "time since failure" will always be short, possible causing more frequent
3862 delivery attempts for the huge message than are intended.
3863 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3865 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3866 $1, $2, $3) because the numerical variables can be reset during some
3867 expansion items (e.g. "match"), thereby losing the authentication data.
3869 PH/21 Make -bV show the size of off_t variables so that the test suite can
3870 decide whether to run tests for quotas > 2G.
3872 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3873 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3874 filecount value is greater than 2G or if a quota value is greater than 2G
3875 on a system where the size of off_t is not greater than 4, a panic error
3878 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3879 never match. The debug and -bh output now contains an explicit error
3880 message indicating a malformed IPv4 address or mask.
3882 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3883 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3884 PH/23 above applies.
3886 PH/25 Do not write to syslog when running in the test harness. The only
3887 occasion when this arises is a failure to open the main or panic logs
3888 (for which there is an explicit test).
3890 PH/26 Added the /no_tell option to "control=freeze".
3892 PH/27 If a host name lookup failed very early in a connection, for example, if
3893 the IP address matched host_lookup and the reverse lookup yielded a name
3894 that did not have a forward lookup, an error message of the form "no IP
3895 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3896 could be logged. Now it outputs the IP address instead of "NULL".
3898 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3899 allows the sender and the authenticated sender to be set when
3900 submitting a message from within Exim. Since child_open_exim() is
3901 documented for local_scan(), the new function should be too.
3903 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3904 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3905 results in an empty string is now treated as unset.
3907 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3909 PH/31 Added sender_verify_fail logging option.
3911 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3912 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3913 tidied the source and removed it altogether.
3915 PH/33 When a queue run was abandoned because the load average was too high, a
3916 log line was always written; now it is written only if the queue_run log
3917 selector is set. In addition, the log line for abandonment now contains
3918 information about the queue run such as the pid. This is always present
3919 in "start" and "stop" lines but was omitted from the "abandon" line.
3921 PH/34 Omit spaces between a header name and the colon in the error message that
3922 is given when verify = headers_syntax fails (if there are lots of them,
3923 the message gets confusing).
3925 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3926 names, as there are now some PTR records that contain slashes. This check
3927 is only to protect against broken name servers that fall over on strange
3928 characters, so the fact that it applies to all lookups doesn't matter.
3930 PH/36 Now that the new test suite is complete, we can remove some of the
3931 special code in Exim that was needed for the old test suite. For example,
3932 sorting DNS records because real resolvers return them in an arbitrary
3933 order. The new test suite's fake resolver always returns records in the
3936 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3937 bounces) except when queue_only is set, to avoid logging races between
3938 the different processes.
3940 PH/38 Panic-die if .include specifies a non-absolute path.
3942 PH/39 A tweak to the "H" retry rule from its user.
3944 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3945 a label. They prevented compilation on older perls.
3947 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3948 a warning to be raised on newish perls.
3950 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3951 on queue. Changes to match documented behaviour of showing count of
3952 messages matching specified criteria.
3954 PH/40 Changed the default ident timeout from 30s to 5s.
3956 PH/41 Added support for the use of login_cap features, on those BSD systems
3957 that have them, for controlling the resources used by pipe deliveries.
3959 PH/42 The content-scanning code uses fopen() to create files in which to put
3960 message data. Previously it was not paying any attention to the mode of
3961 the files. Exim runs with umask(0) because the rest of the code creates
3962 files with open(), and sets the required mode explicitly. Thus, these
3963 files were ending up world-writeable. This was not a big issue, because,
3964 being within the spool directory, they were not world-accessible. I have
3965 created a function called modefopen, which takes an additional mode
3966 argument. It sets umask(777), creates the file, chmods it to the required
3967 mode, then resets the umask. All the relevant calls to fopen() in the
3968 content scanning code have been changed to use this function.
3970 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3971 to 24 hours. This avoids potential overflow problems when processing G
3972 and H retry rules. I suspect nobody ever tinkers with this value.
3974 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3976 PH/45 When the plaintext authenticator is running as a client, the server's
3977 challenges are checked to ensure they are valid base64 strings. By
3978 default, the authentication attempt is cancelled if an invalid string is
3979 received. Setting client_ignore_invalid_base64 true ignores these errors.
3980 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3981 they are received. Thus, the responses can be made to depend on the
3982 challenges. If an invalid string is ignored, an empty string is placed in
3985 PH/46 Messages that are created by the autoreply transport now contains a
3986 References: header, in accordance with RFCs 2822 and 3834.
3988 PH/47 Added authenticated_sender_force to the smtp transport.
3990 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3992 PH/49 Installed latest patch from the Sieve maintainer.
3994 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3995 was also set, the appendfile transport was unnecessarily scanning a
3996 directory of message files (e.g. for maildir delivery) to find the count
3997 of files (along with the size), even though it did not need this
3998 information. It now does the scan only if it needs to find either the
3999 size of the count of files.
4001 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4003 PH/52 Two bugs concerned with error handling when the smtp transport is
4006 (i) Exim was not creating retry information for temporary errors given
4007 for individual recipients after the DATA command when the smtp transport
4008 was used in LMTP mode. This meant that they could be retried too
4009 frequently, and not timed out correctly.
4011 (ii) Exim was setting the flag that allows error details to be returned
4012 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4013 recipients that were returned after the DATA command.
4015 PH/53 This is related to PH/52, but is more general: for any failing address,
4016 when detailed error information was permitted to be returned to the
4017 sender, but the error was temporary, then after the final timeout, only
4018 "retry timeout exceeded" was returned. Now it returns the full error as
4019 well as "retry timeout exceeded".
4021 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4022 do this, and (what is worse) MTAs that accept it.
4024 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4025 will now be deprecated.
4027 PH/56 New os.c-cygwin from the Cygwin maintainer.
4029 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4030 formats (previously only available in exim formats via -bpr, -bpru,
4031 and -bpra. Now also available in native and exiqgrep formats)
4033 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4034 with very large, slow to parse queues
4036 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4038 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4040 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4041 responses to authentication challenges, though it was showing the
4042 challenges; (ii) I've removed the CR characters from the debug output for
4045 PH/58 Allow for the insertion of a newline as well as a space when a string
4046 is turned into more than one encoded-word during RFC 2047 encoding. The
4047 Sieve code now uses this.
4049 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4050 data_4xx, lost_connection, tls_required.
4052 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4053 message was being sent as an SMTP response.
4055 PH/61 Add -l and -k options to exicyclog.
4057 PH/62 When verifying, if an address was redirected to one new address, so that
4058 verification continued, and the new address failed or deferred after
4059 having set something in $address_data, the value of $address_data was not
4060 passed back to the ACL. This was different to the case when no
4061 redirection occurred. The value is now passed back in both cases.
4063 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4064 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4065 use login_cap.h, so on its own it isn't the distinguishing feature. The
4066 new name refers directly to the setclassresources() function.
4068 PH/65 Added configuration files for NetBSD3.
4070 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4072 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4073 is preferred over IPv4.
4075 PH/68 The bounce_return_message and bounce_return_body options were not being
4076 honoured for bounces generated during the reception of non-SMTP messages.
4077 In particular, this applied to messages rejected by the ACL. This bug has
4078 been fixed. However, if bounce_return_message is true and bounce_return_
4079 body is false, the headers that are returned for a non-SMTP message
4080 include only those that have been read before the error was detected.
4081 (In the case of an ACL rejection, they have all been read.)
4083 PH/69 The HTML version of the specification is now built in a directory called
4084 spec_html instead of spec.html, because the latter looks like a path with
4085 a MIME-type, and this confuses some software.
4087 PH/70 Catch two compiler warnings in sieve.c.
4089 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4090 function verify_get_ident() calls ip_connect() to connect a socket, but
4091 if the "connect()" function timed out, ip_connect() used to close the
4092 socket. However, verify_get_ident() also closes the socket later, and in
4093 between Exim writes to the log, which may get opened at this point. When
4094 the socket was closed in ip_connect(), the log could get the same file
4095 descriptor number as the socket. This naturally causes chaos. The fix is
4096 not to close the socket in ip_connect(); the socket should be closed by
4097 the function that creates it. There was only one place in the code where
4098 this was missing, in the iplookup router, which I don't think anybody now
4099 uses, but I've fixed it anyway.
4101 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4102 well as to direct DNS lookups. Otherwise the handling of names in host
4103 lists is inconsistent and therefore confusing.
4109 PH/01 Two changes to the default runtime configuration:
4111 (1) Move the checks for relay_from_hosts and authenticated clients from
4112 after to before the (commented out) DNS black list checks.
4114 (2) Add control=submission to the relay_from_hosts and authenticated
4115 clients checks, on the grounds that messages accepted by these
4116 statements are most likely to be submissions.
4118 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4120 (1) Generate an error if the third argument for the ${prvs expansion is
4123 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4126 (3) Reset the variables that are obtained from the first argument of
4127 ${prvscheck and used in the second argument before leaving the code,
4128 because their memory is reclaimed, so using them afterwards may do
4131 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4132 one (it's much easier than Tom thought :-).
4134 (5) Because of (4), we can now allow for the use of $prvscheck_result
4135 inside the third argument.
4137 PH/03 For some reason, the default setting of PATH when running a command from
4138 a pipe transport was just "/usr/bin". I have changed it to
4141 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4142 anything to be listed in the output from -bV.
4144 PH/05 When a filter generated an autoreply, the entire To: header line was
4145 quoted in the delivery log line, like this:
4147 => >A.N.Other <ano@some.domain> <original@ddress> ...
4149 This has been changed so that it extracts the operative address. There
4150 may be more than one such address. If so, they are comma-separated, like
4153 => >ano@some.domain,ona@other.domain <original@ddress> ...
4155 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4156 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4157 not being looked up in the rDNS to get a host name, Exim was showing the
4158 IP address twice in Received: lines, even though the IP addresses were
4159 identical. For example:
4161 Received: from [1.2.3.4] (helo=[1.2.3.4])
4163 However, if the real host name was known, it was omitting the HELO data
4164 if it matched the actual IP address. This has been tidied up so that it
4165 doesn't show the same IP address twice.
4167 PH/07 When both +timestamp and +memory debugging was on, the value given by
4168 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4169 called by the debug printing, thereby overwriting the timestamp buffer.
4170 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4172 PH/08 When the original message was included in an autoreply transport, it
4173 always said "this is a copy of the message, including all the headers",
4174 even if body_only or headers_only was set. It now gives an appropriate
4177 PH/09 Applied a patch from the Sieve maintainer which:
4179 o fixes some comments
4180 o adds the (disabled) notify extension core
4181 o adds some debug output for the result of if/elsif tests
4182 o points to the current vacation draft in the documentation
4183 and documents the missing references header update
4187 o fixes a bug in processing the envelope test (when testing
4188 multiple envelope elements, the last element determined the
4191 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4192 Electronic Mail") by including:
4194 Auto-submitted: auto-generated
4196 in the messages that it generates (bounce messages and others, such as
4197 warnings). In the case of bounce messages for non-SMTP messages, there was
4198 also a typo: it was using "Auto_submitted" (underscore instead of
4199 hyphen). Since every message generated by Exim is necessarily in response
4200 to another message, thes have all been changed to:
4202 Auto-Submitted: auto-replied
4204 in accordance with these statements in the RFC:
4206 The auto-replied keyword:
4208 - SHOULD be used on messages sent in direct response to another
4209 message by an automatic process,
4211 - MUST NOT be used on manually-generated messages,
4213 - MAY be used on Delivery Status Notifications (DSNs) and Message
4214 Disposition Notifications (MDNs),
4216 - MUST NOT be used on messages generated by automatic or periodic
4217 processes, except for messages which are automatic responses to
4220 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4221 to the default Received: header definition.
4223 PH/12 Added log selector acl_warn_skipped (default on).
4225 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4226 variables because (a) they are in the wrong storage pool and (b) even if
4227 they were copied, it wouldn't work properly because of the caching.
4229 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4230 checking when decoding. Apparently there are clients that generate
4231 overlong encoded strings. Why am I not surprised?
4233 PH/15 If the first argument of "${if match_address" was not empty, but did not
4234 contain an "@" character, Exim crashed. Now it writes a panic log message
4235 and treats the condition as false.
4237 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4239 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4240 extension "envelope-auth". The code is finished and in agreement with
4241 other implementations, but there is no documentation so far and in fact,
4242 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4243 not changing the active code.
4245 Print executed "if" and "elsif" statements when debugging is used. This
4246 helps a great deal to understand what a filter does.
4248 Document more things not specified clearly in RFC3028. I had all this
4249 sorted out, when out of a sudden new issues came to my mind. Oops."
4251 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4254 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4255 canonical form (as documented). However, after a host name lookup from
4256 the IP address, check_host() was doing a simple string comparison with
4257 addresses acquired from the DNS when checking that the found name did
4258 have the original IP as one of its addresses. Since any found IPv6
4259 addresses are likely to be in abbreviated form, the comparison could
4260 fail. Luckily, there already exists a function for doing the comparison
4261 by converting both addresses to binary, so now that is used instead of
4262 the text comparison.
4264 PH/20 There was another similar case to PH/19, when a complete host name was
4265 given in a host list; looking up its IP address could give an abbreviated
4266 form, whereas the current host's name might or might not be abbreviated.
4267 The same fix has been applied.
4273 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4274 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4277 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4278 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4280 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4282 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4283 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4284 Also, for "Auto-Submitted", treat anything other than "no" as
4285 non-personal, in accordance with RFC 3834. (Previously it treated
4286 anything starting "auto-" as non-personal.)
4288 TF/01 The control=submission/name=... option had a problem with syntax
4289 errors if the name included a slash character. The /name= option
4290 now slurps the rest of the string, so it can include any characters
4291 but it must come last in the list of options (after /sender_retain
4294 PH/05 Some modifications to the interface to the fake nameserver for the new
4302 TK/01 Added the "success_on_redirect" address verification option. See
4303 NewStuff for rationale and an example.
4305 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4307 PH/02 Patch to exigrep to allow it to work on syslog lines.
4309 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4310 fread() to skip over the body file's header line, because in Cygwin the
4311 header line is locked and is inaccessible.
4313 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4314 co-exist for some time) to make it clear that it is the Exim ID that is
4315 referenced, not the Message-ID: header line.
4317 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4318 string_format() function, because snprintf() does not exist on all
4321 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4322 ${stat: expansion item.
4324 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4325 protocol synchronization error", to keep the pedants happy.
4327 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4328 well as for IRIX systems, when gcc is being used. See the host.c source
4331 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4333 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4336 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4337 transport and to the smtp transport in LMTP mode.
4339 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4341 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4342 run a filter in a subprocess. This could lead to confusion in subsequent
4343 lookups in the parent process. There should also be a search_tidyup() at
4344 the end of the subprocess.
4346 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4347 only if the host matched helo_try_verify_hosts, which caused the
4348 verification to occur when the EHLO/HELO command was issued. The ACL just
4349 tested the remembered result. Now, if a previous verification attempt has
4350 not happened, "verify = helo" does it there and then.
4352 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4354 TK/03 Fix log output including CR from clamd.
4356 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4357 exist provoked a memory error which could cause a segfault.
4359 PH/15 Installed PCRE 6.2
4361 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4363 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4364 of the problem. Specifically, suggested +O2 rather than +O1 for the
4367 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4369 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4370 record, the port was not correctly logged when the outgoing_port log
4371 selector was set (it logged the transort's default port).
4373 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4374 fallback_hosts, and "hosts" in the smtp transport.
4376 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4377 host errors such as "Connection refused".
4379 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4380 authentication with radiusclient 0.4.9:
4382 - Error returned from rc_read_config was caught wrongly
4383 - Username/password not passed on to radius server due to wrong length.
4385 The presumption is that some radiusclient API changes for 4.51/PH/17
4386 were not taken care of correctly. The code is still untested by me (my
4387 Linux distribution still has 0.3.2 of radiusclient), but it was
4388 contributed by a Radius user.
4390 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4391 expanding the "port" option of the smtp transport.
4393 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4394 while reading a MIME header. Thanks to Tom Hughes for a patch.
4396 PH/24 Include config.h inside local_scan.h so that configuration settings are
4399 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4400 that in an ACL for RCPT (for example), you can examine exactly what was
4403 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4404 commands, but it was not correctly comparing the address with the actual
4405 client host address. Thus, it would show the EHLO address in Received:
4406 header lines when this was not necessary.
4408 PH/27 Added the % operator to ${eval:}.
4410 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4411 it should be ignoring failures (because with -C, for example, it has lost
4412 privilege). It wasn't ignoring creation failures other than "already
4415 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4418 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4419 because an input line was too long, either on its own, or by virtue of
4420 too many continuations, the temporary file was not being removed, and the
4421 return code was incorrect.
4423 PH/31 Missing "BOOL" in function definition in filtertest.c.
4425 PH/32 Applied Sieve patches from the maintainer.
4427 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4429 PH/33 Added "verify = not_blind".
4431 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4432 Local/Makefile (with some defaults set). These are used in built scripts
4433 such as exicyclog, but they have never been used in the exim_install
4434 script (though there are many overriding facilities there). I have
4435 arranged that the exim_install script now takes note of these two
4438 PH/35 Installed configuration files for Dragonfly.
4440 PH/36 When a locally submitted message by a trusted user did not contain a
4441 From: header, and the sender address was obtained from -f or from an SMTP
4442 MAIL command, and the trusted user did not use -F to supply a sender
4443 name, $originator_name was incorrectly used when constructing a From:
4444 header. Furthermore, $originator_name was used for submission mode
4445 messages from external hosts without From: headers in a similar way,
4446 which is clearly wrong.
4448 PH/37 Added control=suppress_local_fixups.
4450 PH/38 When log_selector = +received_sender was set, and the addition of the
4451 sender made the log line's construction buffer exactly full, or one byte
4452 less than full, an overflow happened when the terminating "\n" was
4455 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4456 when the result of a list match is failure because a DNS lookup failed.
4458 PH/40 RM_COMMAND is now used in the building process.
4460 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4461 the "build-* directories that it finds.
4463 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4464 address in a domain literal was a prefix of an interface address.
4466 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4467 when verifying a sender address, unless rewrite_headers is false.
4469 PH/44 Wrote a long comment about why errors_to addresses are verified as
4470 recipients, not senders.
4472 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4473 the ratelimit ACL was added.
4475 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4477 PH/46 Added extra information about PostgreSQL errors to the error string.
4479 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4480 avoiding the need to install special zones in a real server. This is
4481 backwards compatible; if it can't find the fake resolver, it drops back.
4482 Thus, both old and new test suites can be run.
4484 TF/02 Added util/ratelimit.pl
4486 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4487 clock is set back in time.
4489 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4490 Candler <B.Candler@pobox.com>.
4492 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4493 OK for addresses that are the result of redirections.
4495 PH/48 A number of further additions for the benefit of the new test suite,
4496 including a fake gethostbyname() that interfaces to the fake DNS resolver
4499 TF/06 The fix for widen_domains has also been applied to qualify_single and
4500 search_parents which are the other dnslookup options that can cause
4503 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4506 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4508 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4509 service" if it encountered an MX record with an empty target hostname.
4510 The message is now "an MX or SRV record indicated no SMTP service".
4512 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4513 if the DNS of the sending site is misconfigured. This is quite a
4514 common situation. This change restores the behaviour of treating a
4515 helo verification defer as a failure.
4517 PH/51 If self=fail was set on a router, the bounce message did not include the
4518 actual error message.
4524 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4526 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4527 command itself ended in error, the underlying message about the transport
4528 filter timeout was being overwritten with the pipe command error. Now the
4529 underlying error message should be appended to the second error message.
4531 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4533 PH/02 Reduce the amount of output that "make" produces by default. Full output
4534 can still be requested.
4536 PH/03 The warning log line about a condition test deferring for a "warn" verb
4537 was being output only once per connection, rather than after each
4538 occurrence (because it was using the same function as for successful
4539 "warn" verbs). This seems wrong, so I have changed it.
4541 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4542 it should not have, which might have caused a crash in the right
4543 circumstances, but probably never did.
4545 PH/04 Installed a modified version of Tony Finch's patch to make submission
4546 mode fix the return path as well as the Sender: header line, and to
4547 add a /name= option so that you can make the user's friendly name appear
4550 TF/03 Added the control = fakedefer ACL modifier.
4552 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4553 Mark Lowes for thorough testing.
4555 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4557 TK/03 Merged latest SRS patch from Miles Wilton.
4559 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4560 with the definition in sysexits.h (which is #included earlier).
4561 Fortunately, Exim does not actually use EX_OK. The code used to try to
4562 preserve the sysexits.h value, by assuming that macro definitions were
4563 scanned for macro replacements. I have been disabused of this notion,
4564 so now the code just undefines EX_OK before #including unistd.h.
4566 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4567 in the smtp transport. When a block could not be written in a single
4568 write() function, the timeout was being re-applied to each part-write.
4569 This seems wrong - if the receiver was accepting one byte at a time it
4570 would take for ever. The timeout is now adjusted when this happens. It
4571 doesn't have to be particularly precise.
4573 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4574 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4576 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4577 without a domain if the check to <postmaster@domain> fails.
4579 SC/01 Eximstats: added -xls and the ability to specify output files
4580 (patch written by Frank Heydlauf).
4582 SC/02 Eximstats: use FileHandles for outputting results.
4584 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4586 SC/04 Eximstats: fixed display of large numbers with -nvr option
4588 SC/05 Eximstats: fixed merging of reports with empty tables.
4590 SC/06 Eximstats: added the -include_original_destination flag
4592 SC/07 Eximstats: removed tabs and trailing whitespace.
4594 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4596 TK/06 MBOX spool code: Add real "From " MBOX separator line
4597 so the .eml file is really in mbox format (even though
4598 most programs do not really care). Patch from Alex Miller.
4600 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4601 The latter is generated from $received_to and is only set if the
4602 message has one envelope recipient. SA can use these headers,
4603 obviously out-of-the-box. Patch from Alex Miller.
4605 PH/08 The ${def test on a variable was returning false if the variable's
4606 value was "0", contrary to what the specification has always said!
4607 The result should be true unless the variable is empty.
4609 PH/09 The syntax error of a character other than { following "${if
4610 def:variable_name" (after optional whitespace) was not being diagnosed.
4611 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4612 accidental colon was present, for example, could give incorrect results.
4614 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4615 result is used (not including appendfile, where other changes are about
4618 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4619 This involved changing a lot of size variables from int to off_t. It
4620 should work with maildirs and everything.
4622 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4623 spamd dying while we are connected to it.
4625 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4628 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4629 function for BDB 4.3.
4631 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4633 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4634 the sources for PCRE have been re-arranged and more files are now
4637 PH/15 The code I had for printing potentially long long variables in PH/11
4638 above was not the best (it lost precision). The length of off_t variables
4639 is now inspected at build time, and an appropriate printing format (%ld
4640 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4641 to be "long long int" or "long int". This is needed for the internal
4642 formatting function string_vformat().
4644 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4645 the configuration file to be ":syslog", then the script "guesses" where
4646 the logs files are, rather than using the compiled in default. In our
4647 case the guess is not the same as the compiled default, so the script
4648 suddenly stopped working when I started to use syslog. The patch checks
4649 to see if log_file_path is "". If so, it attempts to read it from exim
4650 with no configuration file to get the compiled in version, before it
4651 falls back to the previous guessing code."
4653 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4654 implementing BATV in an Exim configuration. See NewStuff for the gory
4657 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4658 Makefile that are specific to HP-UX.
4660 PH/18 If the "use_postmaster" option was set for a recipient callout together
4661 with the "random" option, the postmaster address was used as the MAIL
4662 FROM address for the random test, but not for the subsequent recipient
4663 test. It is now used for both.
4665 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4666 patch removes a few documentation additions to RFC 3028, because the
4667 latest draft now contains them. It adds the new en;ascii-case comparator
4668 and a new error check for 8bit text in MIME parts. Comparator and
4669 require names are now matched exactly. I enabled the subaddress
4670 extension, but it is not well tested yet (read: it works for me)."
4672 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4673 rework some of the code of TK/09 above to avoid the hardwired use of
4674 "%lld" and "long long". Replaced the call to snprintf() with a call to
4677 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4678 records point to non-existent hosts", "retry timeout exceeded", and
4679 "retry time not reached for any host after a long failure period".
4681 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4682 experimental DomainKeys support:
4684 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4685 (2) On an error such as an illegally used "control", the wrong name for
4686 the control was given.
4688 These problems did NOT occur unless DomainKeys support was compiled.
4690 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4692 PH/24 Added ${if match_ip condition.
4694 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4695 databases so that it will be absolutely obvious if a crash occurs in the
4696 DB library. This is a regular occurrence (often caused by mis-matched
4699 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4700 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4701 picked up on a user's system that detects such things. There doesn't seem
4702 to be a gcc warning option for this - only an attribute that has to be
4703 put on the function's prototype. It seems that in Fedora Core 4 they have
4704 set this on a number of new functions. No doubt there will be more in due
4707 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4708 specify a transport. However, if an address that was verified by such a
4709 router was the subject of a callout, Exim crashed because it tried to
4710 read the rcpt_include_affixes from the non-existent transport. Now it
4711 just assumes that the setting of that option is false. This bug was
4712 introduced by 4.51/PH/31.
4714 PH/28 Changed -d+all to exclude +memory, because that information is very
4715 rarely of interest, but it makes the output a lot bigger. People tend to
4716 do -d+all out of habit.
4718 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4719 code in os-type was giving problems when libc.so lives in lib64, like on
4722 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4723 aren't the modern standard, and it seems that some systems' include files
4724 don't always have them. Exim was already checking for some of the newer
4725 ones like T_AAAA, and defining it itself. I've added checks for all the
4726 record types that Exim uses.
4728 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4729 not automatically generating a new one, as it is supposed to. This
4730 prevented TLS from working. If the file did exist, but contained invalid
4731 data, a new version was generated, as expected. It was only the case of a
4732 non-existent file that was broken.
4734 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4735 with a change in libdomainkeys > 0.64.
4737 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4738 from DNS. If the selector record carries the flag, it now has
4739 precedence over the domain-wide flag.
4741 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4743 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4744 the use of a port name that isn't defined in /etc/services) occurred, the
4745 message was deferred as in a normal delivery, and thus remained on the
4746 spool, instead of being failed because of the mua_wrapper setting. This
4747 is now fixed, and I tidied up some of the mua_wrapper messages at the
4750 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4751 the messages in a hash of arrays rather than using individual hashes.
4752 This is a bit cleaner and results in dramatic memory savings, albeit
4753 at a slight CPU cost.
4755 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4756 as requested by Marc Sherman.
4758 SC/10 Eximstats: added histograms for user specified patterns as requested
4761 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4763 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4764 fopen() in the content-scanning modules that did not already have it.
4770 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4771 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4773 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4775 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4777 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4778 to test Sieve filters that use "vacation".
4780 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4781 that changes the way the GnuTLS parameters are stored in the cache file.
4782 The new format can be generated externally. For backward compatibility,
4783 if the data in the cache doesn't make sense, Exim assumes it has read an
4784 old-format file, and it generates new data and writes a new file. This
4785 means that you can't go back to an older release without removing the
4788 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4789 work if there are any delivery delays because "one_time" forces the
4790 parent to be marked "delivered", so its unseen clone is never tried
4791 again. For this reason, Exim now forbids the simultaneous setting of
4794 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4795 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4796 entry if you want to know the details. The fix, however, neglected to
4797 consider the case when local delivery batching is involved. The test for
4798 "previously delivered" was not happening when checking to see if an
4799 address could be batched with a previous (undelivered) one; under
4800 certain circumstances this could lead to multiple deliveries to the same
4803 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4804 in its include files, and this causes problems building Exim.
4806 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4807 header_syntax) but Exim was just ignoring anything given after a slash.
4808 In particular, this caused confusion with an attempt to use "verify =
4809 reverse_host_lookup/defer_ok". An error is now given when options are
4810 supplied for verify items that do not have them. (Maybe reverse_host_
4811 lookup should have a defer_ok option, but that's a different point.)
4813 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4814 defined by RFC 821) to 2048, because there were problems with some AUTH
4815 commands, and RFC 1869 says the size should be increased for extended
4816 SMTP commands that take arguments.
4818 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4821 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4822 "unknown" error; now it says that the functionality isn't in the binary.
4824 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4825 an address' error message when a string expansion fails (syntax or
4826 whatever). Otherwise the password may appear in the log. Following change
4827 PH/42 below, there is no longer a chance of it appearing in a bounce
4830 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4832 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4833 of its addresses was ever tried. (Bugzilla bug #2.)
4835 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4836 the result incorrectly in the debug output. (It correctly added a newline
4837 to what was transported.)
4839 TF/01 Added $received_time.
4841 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4842 commented out examples of how to interface to a virus scanner and to
4843 SpamAssassin. Also added commented examples of av_scanner and
4844 spamd_address settings.
4846 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4847 and controls are allowed in which ACLs. There were a couple of minor
4848 errors. Some of the entries in the conditions table (which is a table of
4849 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4850 negation of where the condition IS allowed.
4852 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4854 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4855 header file does not have a version number, so I've had to invent a new
4856 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4857 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4858 radiusclient), but it was contributed by a Radius user.
4860 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4861 files or directories, for OpenSSL.
4863 PH/19 When an Exim process that is running as root has to create an Exim log
4864 file, it does so in a subprocess that runs as exim:exim so as to get the
4865 ownership right at creation (otherwise, other Exim processes might see
4866 the file with the wrong ownership). There was no test for failure of this
4867 fork() call, which would lead to the process getting stuck as it waited
4868 for a non-existent subprocess. Forks do occasionally fail when resources
4869 run out. I reviewed all the other calls to fork(); they all seem to check
4872 PH/20 When checking for unexpected SMTP input at connect time (before writing
4873 the banner), Exim was not dealing correctly with a non-positive return
4874 from the read() function. If the client had disconnected by this time,
4875 the result was a log entry for a synchronization error with an empty
4876 string after "input=" when read() returned zero. If read() returned -1
4877 (an event I could not check), uninitialized data bytes were printed.
4878 There were reports of junk text (parts of files, etc) appearing after
4881 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4883 PH/22 Added support for macro redefinition, and (re)definition in between
4884 driver and ACL definitions.
4886 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4887 forgetting to use the resulting value; it was using the unexpanded value.
4889 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4890 hadn't been configured. The fix is from Juergen Kreileder, who
4891 understands it better than I do:
4893 "Here's what I see happening with three configured cyrus_sasl
4894 authenticators configured (plain, login, cram-md5):
4896 On startup auth_cyrus_sasl_init() gets called for each of these.
4897 This means three calls to sasl_listmech() without a specified mech_list.
4898 => SASL tests which mechs of all available mechs actually work
4899 => three warnings about OTP not working
4900 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4902 With the patch, sasl_listmech() also gets called three times. But now
4903 SASL's mech_list option is set to the server_mech specified in the the
4904 authenticator. Or in other words, the answer from sasl_listmech()
4905 gets limited to just the mech you're testing for (which is different
4907 => the return list contains just 'plain' or 'login', 'cram-md5' or
4908 nothing depending on the value of ob->server_mech.
4910 I've just tested the patch: Authentication still works fine,
4911 unavailable mechs specified in the exim configuration are still
4912 caught, and the auth.log warnings about OTP are gone."
4914 PH/25 When debugging is enabled, the contents of the command line are added
4915 to the debugging output, even when log_selector=+arguments is not
4918 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4919 answer is "GNU", and only if the return is "GNU/something" is the answer
4922 PH/27 $acl_verify_message is now set immediately after the failure of a
4923 verification in an ACL, and so is available in subsequent modifiers. In
4924 particular, the message can be preserved by coding like this:
4926 warn !verify = sender
4927 set acl_m0 = $acl_verify_message
4929 Previously, $acl_verify_message was set only while expanding "message"
4930 and "log_message" when a very denied access.
4932 PH/28 Modified OS/os.c-Linux with
4934 -#ifndef OS_LOAD_AVERAGE
4935 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4937 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4938 nomenclature these days.)
4940 PH/29 Installed patch from the Sieve maintainer that adds the options
4941 sieve_useraddress and sieve_subaddress to the redirect router.
4943 PH/30 In these circumstances:
4944 . Two addresses routed to the same list of hosts;
4945 . First host does not offer TLS;
4946 . First host accepts first address;
4947 . First host gives temporary error to second address;
4948 . Second host offers TLS and a TLS session is established;
4949 . Second host accepts second address.
4950 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4951 and peerdn, if requested) that were in fact used only for the second
4954 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4955 attention to any local part prefix or suffix that was matched by the
4956 router that accepted the address. It now behaves in the same way as it
4957 does for delivery: the affixes are removed from the local part unless
4958 rcpt_include_affixes is set on the transport.
4960 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4961 timeout during the DATA phase of an incoming message.
4963 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4964 applied a patch sanctioned by the Sieve maintainer.
4966 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4967 the uid or gid is negative. A case of a negative gid caused this to be
4968 noticed. The fix allows for either to be negative.
4970 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4971 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4974 PH/36 The change PH/12 above was broken. Fixed it.
4976 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4977 the grounds that routing the same address twice would always produce the
4978 same answer. This might have been true once, but it is certainly no
4979 longer true now. Routing a child address may depend on the previous
4980 routing that produced that child. Some complicated redirection strategies
4981 went wrong when messages had multiple recipients, and made Exim's
4982 behaviour dependent on the order in which the addresses were given.
4984 I have moved the duplicate checking until after the routing is complete.
4985 Exim scans the addresses that are assigned to local and remote
4986 transports, and removes any duplicates. This means that more work will be
4987 done, as duplicates will always all be routed, but duplicates are
4988 presumably rare, so I don't expect this is of any significance.
4990 For deliveries to pipes, files, and autoreplies, the duplicate checking
4991 still happens during the routing process, since they are not going to be
4994 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4995 It corrects a timeout issue with spamd. This is Ian's comment: "The
4996 background is that sometimes spamd either never reads data from a
4997 connection it has accepted, or it never writes response data. The exiscan
4998 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4999 blindly assumes that writes won't block so it may never time out."
5001 PH/39 Allow G after quota size as well as K and M.
5003 PH/40 The value set for $authenticated_id in an authenticator may not contain
5004 binary zeroes or newlines because the value is written to log lines and
5005 to spool files. There was no check on this. Now the value is run through
5006 the string_printing() function so that such characters are converted to
5007 printable escape sequences.
5009 PH/41 $message_linecount is a new variable that contains the total number of
5010 lines in the message. Compare $body_linecount, which is the count for the
5013 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5014 bounce and delay warning messages, except in certain special cases, which
5017 (a) An SMTP error message from a remote host;
5018 (b) A message specified in a :fail: redirection;
5019 (c) A message specified in a "fail" command in a system filter;
5020 (d) A message specified in a FAIL return from the queryprogram router;
5021 (e) A message specified by the cannot_route_message router option.
5023 In these cases only, Exim does include the error details in bounce and
5024 warning messages. There are also a few cases where bland messages such
5025 as "unrouteable address" or "local delivery error" are given.
5027 PH/43 $value is now also set for the "else" part of a ${run expansion.
5029 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5030 being worked on, but at least Exim now implements the latest version to
5033 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5034 process to complete was treated as a delivery failure, a timeout while
5035 writing the message to the pipe was logged, but erroneously treated as a
5036 successful delivery. Such timeouts include transport filter timeouts. For
5037 consistency with the overall process timeout, these timeouts are now
5038 treated as errors, giving rise to delivery failures by default. However,
5039 there is now a new Boolean option for the pipe transport called
5040 timeout_defer, which, if set TRUE, converts the failures into defers for
5041 both kinds of timeout. A transport filter timeout is now identified in
5044 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5045 systems where "make" and "gmake" are different, calling "gmake" at top
5046 level broke things. I've arranged for the value of $(MAKE) to be passed
5047 from the Makefile to this script so that it can call the same version of
5051 A note about Exim versions 4.44 and 4.50
5052 ----------------------------------------
5054 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5055 changes of various kinds. As a consequence, a big documentation update was
5056 needed. This delayed the release for rather longer than seemed good, especially
5057 in the light of a couple of (minor) security issues. Therefore, the changes
5058 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5059 release. So 4.44 and 4.50 are in effect two different branches that both start
5062 I have left the 4.50 change log unchanged; it contains all the changes since
5063 4.43. The change log for 4.44 is below; many of its items are identical to
5064 those for 4.50. This seems to be the most sensible way to preserve the
5065 historical information.
5071 1. Minor wording change to the doc/README.SIEVE file.
5073 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5074 computation of the current number of files was incorrect.
5076 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5077 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5080 4. Give more explanation in the error message when the command for a transport
5081 filter fails to execute.
5083 5. There are several places where Exim runs a non-Exim command in a
5084 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5085 was being done only for the command run by the queryprogram router. It is
5086 now done for all such subprocesses. The other cases are: ${run, transport
5087 filters, and the commands run by the lmtp and pipe transports.
5089 6. Added CONFIGURE_GROUP build-time option.
5091 7. Some older OS have a limit of 256 on the maximum number of file
5092 descriptors. Exim was using setrlimit() to set 1000 as a large value
5093 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5094 systems. I've change it so that if it can't get 1000, it tries for 256.
5096 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5097 was an oversight, and furthermore, ever since the addition of extra
5098 controls (e.g. 4.43/32), the checks on when to allow different forms of
5099 "control" were broken. There should now be diagnostics for all cases when a
5100 control that does not make sense is encountered.
5102 9. Added the /retain_sender option to "control=submission".
5104 10. $recipients is now available in the predata ACL (oversight).
5106 11. Tidy the search cache before the fork to do a delivery from a message
5107 received from the command line. Otherwise the child will trigger a lookup
5108 failure and thereby defer the delivery if it tries to use (for example) a
5109 cached ldap connection that the parent has called unbind on.
5111 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5112 of $address_data from the recipient verification was clobbered by the
5113 sender verification.
5115 13. The value of address_data from a sender verification is now available in
5116 $sender_address_data in subsequent conditions in the ACL statement.
5118 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5120 15. Added a new option "connect=<time>" to callout options, to set a different
5123 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5124 was its contents. (It was OK if the option was not defined at all.)
5126 17. A "Completed" log line is now written for messages that are removed from
5127 the spool by the -Mrm option.
5129 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5130 information about exactly what failed.
5132 19. Added -dd to debug only the daemon process.
5134 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5135 handles timeouts, both on the server side and network timeouts. Renamed the
5136 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5138 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5139 It is now set to "smtps".
5141 22. $host_address is now set to the target address during the checking of
5142 ignore_target_hosts.
5144 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5145 being passed; this would have caused $sender_host_name to have been used if
5146 matching the list had actually called for a host name (not very likely,
5147 since this list is usually IP addresses). A host name is now passed as
5150 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5151 code that specifies a non-restarting handler (typically sigaction() in
5152 modern systems) in an attempt to fix a rare and obscure crash bug.
5154 25. Narrowed the window for a race in the daemon that could cause it to ignore
5155 SIGCHLD signals. This is not a major problem, because they are used only to
5156 wake it up if nothing else does.
5158 26. A malformed maildirsize file could cause Exim to calculate negative values
5159 for the mailbox size or file count. Odd effects could occur as a result.
5160 The maildirsize information is now recalculated if the size or filecount
5163 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5164 support for a long time. Removed HAVE_SYS_VFS_H.
5166 28. Installed the latest version of exipick from John Jetmore.
5168 29. In an address list, if the pattern was not a regular expression, an empty
5169 subject address (from a bounce message) matched only if the pattern was an
5170 empty string. Non-empty patterns were not even tested. This was the wrong
5171 because it is perfectly reasonable to use an empty address as part of a
5172 database query. An empty address is now tested by patterns that are
5173 lookups. However, all the other forms of pattern expect the subject to
5174 contain a local part and a domain, and therefore, for them, an empty
5175 address still always fails if the pattern is not itself empty.
5177 30. Exim went into a mad DNS loop when attempting to do a callout where the
5178 host was specified on an smtp transport, and looking it up yielded more
5179 than one IP address.
5181 31. Re-factored the code for checking spool and log partition space into a
5182 function that finds that data and another that does the check. The former
5183 is then used to implement four new variables: $spool_space, $log_space,
5184 $spool_inodes, and $log_inodes.
5186 32. The RFC2047 encoding function was originally intended for short strings
5187 such as real names; it was not keeping to the 75-character limit for
5188 encoded words that the RFC imposes. It now respects the limit, and
5189 generates multiple encoded words if necessary. To be on the safe side, I
5190 have increased the buffer size for the ${rfc2047: expansion operator from
5193 33. It is now permitted to omit both strings after an "if" condition; if the
5194 condition is true, the result is "true". As before, when the second string
5195 is omitted, a false condition yields an empty string. This makes it less
5196 cumbersome to write custom ACL and router conditions.
5198 34. Failure to deliver a bounce message always caused it to be frozen, even if
5199 there was an errors_to setting on the router. The errors_to setting is now
5202 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5203 canonical form (fully expanded) before being placed in
5204 $sender_host_address.
5206 36. The table in the code that translates DNS record types into text (T_A to
5207 "A" for instance) was missing entries for NS and CNAME. It is just possible
5208 that this could have caused confusion if both these types were looked up
5209 for the same domain, because the text type is used as part of Exim's
5210 per-process caching. But the chance of anyone hitting this buglet seems
5213 37. The dnsdb lookup has been extended in a number of ways.
5215 (1) There is a new type, "zns", which walks up the domain tree until it
5216 finds some nameserver records. It should be used with care.
5218 (2) There is a new type, "mxh", which is like "mx" except that it returns
5219 just the host names, not the priorities.
5221 (3) It is now possible to give a list of domains (or IP addresses) to be
5222 looked up. The behaviour when one of the lookups defers can be
5223 controlled by a keyword.
5225 (4) It is now possible to specify the separator character for use when
5226 multiple records are returned.
5228 38. The dnslists ACL condition has been extended: it is now possible to supply
5229 a list of IP addresses and/or domains to be looked up in a particular DNS
5232 39. Added log_selector=+queue_time_overall.
5234 40. When running the queue in the test harness, wait just a tad after forking a
5235 delivery process, to get repeatability of debugging output.
5237 41. Include certificate and key file names in error message when GnuTLS fails
5238 to set them up, because the GnuTLS error message doesn't include the name
5239 of the failing file when there is a problem reading it.
5241 42. Allow both -bf and -bF in the same test run.
5243 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5245 44. The "Exiscan patch" is now merged into the mainline Exim source.
5247 45. Sometimes the final signoff response after QUIT could fail to get
5248 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5249 < 0 before doing a fflush(). This bug looks as though it goes back to the
5250 introduction of TLS in release 3.20, but "sometimes" must have been rare
5251 because the tests only now provoked it.
5253 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5254 (this can affect the format of dates).
5256 47. exim_tidydb, when checking for the continued existence of a message for
5257 which it has found a message-specific retry record, was not finding
5258 messages that were in split spool directories. Consequently, it was
5259 deleting retry records that should have stayed in existence.
5261 48. Steve fixed some bugs in eximstats.
5263 49. The SPA authentication driver was not abandoning authentication and moving
5264 on to the next authenticator when an expansion was forced to fail,
5265 contradicting the general specification for all authenticators. Instead it
5266 was generating a temporary error. It now behaves as specified.
5268 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5269 (the order specifies the preference for clients). The order is now AES256,
5270 AES128, 3DES, ARCFOUR128.
5272 51. Small patch to Sieve code - explicitly set From: when generating an
5275 52. Exim crashed if a remote delivery caused a very long error message to be
5276 recorded - for instance if somebody sent an entire SpamAssassin report back
5277 as a large number of 550 error lines. This bug was coincidentally fixed by
5278 increasing the size of one of Exim's internal buffers (big_buffer) that
5279 happened as part of the Exiscan merge. However, to be on the safe side, I
5280 have made the code more robust (and fixed the comments that describe what
5283 53. Now that there can be additional text after "Completed" in log lines (if
5284 the queue_time_overall log selector is set), a one-byte patch to exigrep
5285 was needed to allow it to recognize "Completed" as not the last thing in
5288 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5289 patch that reportedly fixes this has been added. I am not expert enough to
5290 create a test for it. This is what the patch creator wrote:
5292 "I found a little strange behaviour of ldap code when working with
5293 Windows 2003 AD Domain, where users was placed in more than one
5294 Organization Units. When I tried to give exim partial DN, the exit code
5295 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5296 But simultaneously result of request was absolutely normal ldap result,
5297 so I produce this patch..."
5299 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5300 REFERENCE, so I have modified the code to exclude the patch when that macro
5303 55. Some experimental protocols are using DNS PTR records for new purposes. The
5304 keys for these records are domain names, not reversed IP addresses. The
5305 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5306 leaves it alone. Component reversal etc. now happens only for IP addresses.
5309 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5311 57. Double the size of the debug message buffer (to 2048) so that more of very
5312 long debug lines gets shown.
5314 58. The exicyclog utility now does better if the number of log files to keep
5315 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5317 59. Two changes related to the smtp_active_hostname option:
5319 (1) $smtp_active_hostname is now available as a variable.
5320 (2) The default for smtp_banner uses $smtp_active_hostname instead
5321 of $primary_hostname.
5323 60. The host_aton() function is supposed to be passed a string that is known
5324 to be a valid IP address. However, in the case of IPv6 addresses, it was
5325 not checking this. This is a hostage to fortune. Exim now panics and dies
5326 if the condition is not met. A case was found where this could be provoked
5327 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5328 components; fortuitously, this particular loophole had already been fixed
5329 by change 4.50/55 above.
5331 If there are any other similar loopholes, the new check in host_aton()
5332 itself should stop them being exploited. The report I received stated that
5333 data on the command line could provoke the exploit when Exim was running as
5334 exim, but did not say which command line option was involved. All I could
5335 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5336 running as the user.
5339 61. There was a buffer overflow vulnerability in the SPA authentication code
5340 (which came originally from the Samba project). I have added a test to the
5341 spa_base64_to_bits() function which I hope fixes it.
5344 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5345 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5347 63. The daemon start-up calls getloadavg() while still root for those OS that
5348 need the first call to be done as root, but it missed one case: when
5349 deliver_queue_load_max is set with deliver_drop_privilege. This is
5350 necessary for the benefit of the queue runner, because there is no re-exec
5351 when deliver_drop_privilege is set.
5353 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5354 This has been fixed.
5356 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5357 was in use, was not putting the data itself into the right store pool;
5358 consequently, it could be overwritten for a subsequent message in the same
5359 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5362 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5364 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5365 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5366 the function were treating the return as a boolean value, which happened to
5367 work because 0=false and not-0=true, but is not correct code.
5369 68. The host_aton() function was not handling scoped IPv6 addresses (those
5370 with, for example, "%eth0" on the end) correctly.
5372 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5373 negated items (that is, ~something) in unsigned ints. Some compilers
5374 apparently mutter when there is no cast.
5376 70. If an address verification called from an ACL failed, and did not produce a
5377 user-specific message (i.e. there was only a "system" message), nothing was
5378 put in $acl_verify_message. In this situation, it now puts the system
5381 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5382 session; change 4.31/43 added the unwanted input to the log line - except
5383 that it did not do this in the start of session case. It now does.
5385 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5386 This is wrong and can cause the other end to generate a synchronization
5387 error if it is another Exim or anything else that does the synchronization
5388 check. A QUIT command is no longer sent after a timeout.
5390 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5391 during host lookups.
5393 74. The defer_ok option of callout verification was not working if it was used
5394 when verifying addresses in header lines, that is, for this case:
5396 verify = header_sender/callout=defer_ok
5398 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5399 those file descriptors could be used for SMTP connections. If anything
5400 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5401 could be sent to the SMTP client, causing chaos. The daemon now opens
5402 stdin, stdout, and stderr to /dev/null when it puts itself into the
5405 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5406 log by default. The user can override this with suitable Perl magic.
5408 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5409 the log message when discard triggers, was not working for the DATA ACL or
5410 for the non-SMTP ACL.
5412 78. Error message wording change in sieve.c.
5414 79. If smtp_accept_max_per_host was set, the number of connections could be
5415 restricted to fewer than expected, because the daemon was trying to set up
5416 a new connection before checking whether the processes handling previous
5417 connections had finished. The check for completed processes is now done
5418 earlier. On busy systems, this bug wouldn't be noticed because something
5419 else would have woken the daemon, and it would have reaped the completed
5422 80. If a message was submitted locally by a user whose login name contained one
5423 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5424 It caused a spool format error. I have fixed the spool reading code. A
5425 related problem was that the "from" clause in the Received: line became
5426 illegal because of the space(s). It is now covered by ${quote_local_part.
5428 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5431 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5433 83. Patch from Sieve maintainer to fix unterminated string problem in
5434 "vacation" handling.
5436 84. Some minor changes to the Linux configuration files to help with other
5437 OS variants using glibc.
5439 85. One more patch for Sieve to update vacation handling to latest spec.
5442 ----------------------------------------------------
5443 See the note above about the 4.44 and 4.50 releases.
5444 ----------------------------------------------------
5450 1. Change 4.43/35 introduced a bug that caused file counts to be
5451 incorrectly computed when quota_filecount was set in an appendfile
5454 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5455 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5458 3. Give more explanation in the error message when the command for a transport
5459 filter fails to execute.
5461 4. There are several places where Exim runs a non-Exim command in a
5462 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5463 was being done only for the command run by the queryprogram router. It is
5464 now done for all such subprocesses. The other cases are: ${run, transport
5465 filters, and the commands run by the lmtp and pipe transports.
5467 5. Some older OS have a limit of 256 on the maximum number of file
5468 descriptors. Exim was using setrlimit() to set 1000 as a large value
5469 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5470 systems. I've change it so that if it can't get 1000, it tries for 256.
5472 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5473 was an oversight, and furthermore, ever since the addition of extra
5474 controls (e.g. 4.43/32), the checks on when to allow different forms of
5475 "control" were broken. There should now be diagnostics for all cases when a
5476 control that does not make sense is encountered.
5478 7. $recipients is now available in the predata ACL (oversight).
5480 8. Tidy the search cache before the fork to do a delivery from a message
5481 received from the command line. Otherwise the child will trigger a lookup
5482 failure and thereby defer the delivery if it tries to use (for example) a
5483 cached ldap connection that the parent has called unbind on.
5485 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5486 of $address_data from the recipient verification was clobbered by the
5487 sender verification.
5489 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5490 was its contents. (It was OK if the option was not defined at all.)
5492 11. A "Completed" log line is now written for messages that are removed from
5493 the spool by the -Mrm option.
5495 12. $host_address is now set to the target address during the checking of
5496 ignore_target_hosts.
5498 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5499 being passed; this would have caused $sender_host_name to have been used if
5500 matching the list had actually called for a host name (not very likely,
5501 since this list is usually IP addresses). A host name is now passed as
5504 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5505 code that specifies a non-restarting handler (typically sigaction() in
5506 modern systems) in an attempt to fix a rare and obscure crash bug.
5508 15. Narrowed the window for a race in the daemon that could cause it to ignore
5509 SIGCHLD signals. This is not a major problem, because they are used only to
5510 wake it up if nothing else does.
5512 16. A malformed maildirsize file could cause Exim to calculate negative values
5513 for the mailbox size or file count. Odd effects could occur as a result.
5514 The maildirsize information is now recalculated if the size or filecount
5517 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5518 support for a long time. Removed HAVE_SYS_VFS_H.
5520 18. Updated exipick to current release from John Jetmore.
5522 19. Allow an empty sender to be matched against a lookup in an address list.
5523 Previously the only cases considered were a regular expression, or an
5526 20. Exim went into a mad DNS lookup loop when doing a callout where the
5527 host was specified on the transport, if the DNS lookup yielded more than
5530 21. The RFC2047 encoding function was originally intended for short strings
5531 such as real names; it was not keeping to the 75-character limit for
5532 encoded words that the RFC imposes. It now respects the limit, and
5533 generates multiple encoded words if necessary. To be on the safe side, I
5534 have increased the buffer size for the ${rfc2047: expansion operator from
5537 22. Failure to deliver a bounce message always caused it to be frozen, even if
5538 there was an errors_to setting on the router. The errors_to setting is now
5541 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5542 canonical form (fully expanded) before being placed in
5543 $sender_host_address.
5545 24. Updated eximstats to version 1.33
5547 25. Include certificate and key file names in error message when GnuTLS fails
5548 to set them up, because the GnuTLS error message doesn't include the name
5549 of the failing file when there is a problem reading it.
5551 26. Expand error message when OpenSSL has problems setting up cert/key files.
5554 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5555 (this can affect the format of dates).
5557 28. exim_tidydb, when checking for the continued existence of a message for
5558 which it has found a message-specific retry record, was not finding
5559 messages that were in split spool directories. Consequently, it was
5560 deleting retry records that should have stayed in existence.
5562 29. eximstats updated to version 1.35
5563 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5564 1.35 - bugfix such that pie charts by volume are generated correctly
5566 30. The SPA authentication driver was not abandoning authentication and moving
5567 on to the next authenticator when an expansion was forced to fail,
5568 contradicting the general specification for all authenticators. Instead it
5569 was generating a temporary error. It now behaves as specified.
5571 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5572 (the order specifies the preference for clients). The order is now AES256,
5573 AES128, 3DES, ARCFOUR128.
5575 31. Small patch to Sieve code - explicitly set From: when generating an
5578 32. Exim crashed if a remote delivery caused a very long error message to be
5579 recorded - for instance if somebody sent an entire SpamAssassin report back
5580 as a large number of 550 error lines. This bug was coincidentally fixed by
5581 increasing the size of one of Exim's internal buffers (big_buffer) that
5582 happened as part of the Exiscan merge. However, to be on the safe side, I
5583 have made the code more robust (and fixed the comments that describe what
5586 33. Some experimental protocols are using DNS PTR records for new purposes. The
5587 keys for these records are domain names, not reversed IP addresses. The
5588 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5589 leaves it alone. Component reversal etc. now happens only for IP addresses.
5592 34. The host_aton() function is supposed to be passed a string that is known
5593 to be a valid IP address. However, in the case of IPv6 addresses, it was
5594 not checking this. This is a hostage to fortune. Exim now panics and dies
5595 if the condition is not met. A case was found where this could be provoked
5596 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5597 components; fortuitously, this particular loophole had already been fixed
5598 by change 4.50/55 or 4.44/33 above.
5600 If there are any other similar loopholes, the new check in host_aton()
5601 itself should stop them being exploited. The report I received stated that
5602 data on the command line could provoke the exploit when Exim was running as
5603 exim, but did not say which command line option was involved. All I could
5604 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5605 running as the user.
5608 35. There was a buffer overflow vulnerability in the SPA authentication code
5609 (which came originally from the Samba project). I have added a test to the
5610 spa_base64_to_bits() function which I hope fixes it.
5613 36. The daemon start-up calls getloadavg() while still root for those OS that
5614 need the first call to be done as root, but it missed one case: when
5615 deliver_queue_load_max is set with deliver_drop_privilege. This is
5616 necessary for the benefit of the queue runner, because there is no re-exec
5617 when deliver_drop_privilege is set.
5619 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5620 was in use, was not putting the data itself into the right store pool;
5621 consequently, it could be overwritten for a subsequent message in the same
5622 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5625 38. Sometimes the final signoff response after QUIT could fail to get
5626 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5627 < 0 before doing a fflush(). This bug looks as though it goes back to the
5628 introduction of TLS in release 3.20, but "sometimes" must have been rare
5629 because the tests only now provoked it.
5635 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5636 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5637 Now it returns an integer. A number of calls were still expecting a T/F
5638 return. Fortuitously, in all cases, the tests worked in OK situations,
5639 which is the norm. However, things would have gone wrong on any write
5640 failures on the smtp file descriptor. This function is used when sending
5641 messages over SMTP and also when doing verify callouts.
5643 2. When Exim is called to do synchronous delivery of a locally submitted
5644 message (the -odf or -odi options), it no longer closes stderr before doing
5647 3. Implemented the mua_wrapper option.
5649 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5651 5. Implemented the functions header_remove(), header_testname(),
5652 header_add_at_position(), and receive_remove_recipient(), and exported them
5655 6. If an ACL "warn" statement specified the addition of headers, Exim already
5656 inserted X-ACL-Warn: at the start if there was no header name. However, it
5657 was not making this test for the second and subsequent header lines if
5658 there were newlines in the string. This meant that an invalid header could
5659 be inserted if Exim was badly configured.
5661 7. Allow an ACL "warn" statement to add header lines at the start or after all
5662 the Received: headers, as well as at the end.
5664 8. Added the rcpt_4xx retry error code.
5666 9. Added postmaster_mailfrom=xxx to callout verification option.
5668 10. Added mailfrom=xxxx to the callout verification option, for verify=
5671 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5672 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5674 12. Inserted some casts to stop certain compilers warning when using pointer
5675 differences as field lengths or precisions in printf-type calls (mostly
5676 affecting debugging statements).
5678 13. Added optional readline() support for -be (dynamically loaded).
5680 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5681 same clock tick as a message's arrival, so that its received time was the
5682 same as the "first fail" time on the retry record, and that message
5683 remained on the queue past the ultimate address timeout, every queue runner
5684 would try a delivery (because it was past the ultimate address timeout) but
5685 after another failure, the ultimate address timeout, which should have then
5686 bounced the address, did not kick in. This was a "< instead of <=" error;
5687 in most cases the first failure would have been in the next clock tick
5688 after the received time, and all would be well.
5690 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5691 being recognized when the domain list was tested by the match_domain
5692 condition in an expansion string.
5694 16. Added the ${str2b64: operator.
5696 17. Exim was always calling setrlimit() to set a large limit for the number of
5697 processes, without checking whether the existing limit was already
5698 adequate. (It did check for the limit on file descriptors.) Furthermore,
5699 errors from getrlimit() and setrlimit() were being ignored. Now they are
5700 logged to the main and panic logs, but Exim does carry on, to try to do its
5701 job under whatever limits there are.
5703 18. Imported PCRE 5.0.
5705 19. Trivial typo in log message " temporarily refused connection" (the leading
5708 20. If the log selector return_path_on_delivery was set and an address was
5709 redirected to /dev/null, the delivery process crashed because it assumed
5710 that a return path would always be set for a "successful" delivery. In this
5711 case, the whole delivery is bypassed as an optimization, and therefore no
5714 21. Internal re-arrangement: the function for sending a challenge and reading
5715 a response while authentication was assuming a zero-terminated challenge
5716 string. It's now changed to take a pointer and a length, to allow for
5717 binary data in such strings.
5719 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5721 23. Exim was not respecting finduser_retries when seeking the login of the
5722 uid under which it was called; it was always trying 10 times. (The default
5723 setting of finduser_retries is zero.) Also, it was sleeping after the final
5724 failure, which is pointless.
5726 24. Implemented tls_on_connect_ports.
5728 25. Implemented acl_smtp_predata.
5730 26. If the domain in control=submission is set empty, Exim assumes that the
5731 authenticated id is a complete email address when it generates From: or
5732 Sender: header lines.
5734 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5735 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5736 chown and chgrp in /bin and hostname in /usr/bin.
5738 28. Exim was keeping the "process log" file open after each use, just as it
5739 does for the main log. This opens the possibility of it remaining open for
5740 long periods when the USR1 signal hits a daemon. Occasional processlog
5741 errors were reported, that could have been caused by this. Anyway, it seems
5742 much more sensible not to leave this file open at all, so that is what now
5745 29. The long-running daemon process does not normally write to the log once it
5746 has entered its main loop, and it closes the log before doing so. This is
5747 so that log files can straightforwardly be renamed and moved. However,
5748 there are a couple of unusual error situations where the daemon does write
5749 log entries, and I had neglected to close the log afterwards.
5751 30. The text of an SMTP error response that was received during a remote
5752 delivery was being truncated at 512 bytes. This is too short for some of
5753 the long messages that one sometimes sees. I've increased the limit to
5756 31. It is now possible to make retry rules that apply only when a message has a
5757 specific sender, in particular, an empty sender.
5759 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5760 it possible to be selective about when SMTP synchronization is enforced.
5762 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5764 32. Implemented hosts_connection_nolog.
5766 33. Added an ACL for QUIT.
5768 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5771 35. Added mailbox_size and mailbox_filecount to appendfile.
5773 36. Added control = no_multiline_responses to ACLs.
5775 37. There was a bug in the logic of the code that waits for the clock to tick
5776 in the case where the clock went backwards by a substantial amount such
5777 that the microsecond fraction of "now" was more than the microsecond
5778 fraction of "then" (but the whole seconds number was less).
5780 38. Added support for the libradius Radius client library this is found on
5781 FreeBSD (previously only the radiusclient library was supported).
5787 1. When certain lookups returned multiple values in the form name=value, the
5788 quoting of the values was not always being done properly. Specifically:
5789 (a) If the value started with a double quote, but contained no whitespace,
5791 (b) If the value contained whitespace other than a space character (i.e.
5792 tabs or newlines or carriage returns) it was not quoted.
5793 This fix has been applied to the mysql and pgsql lookups by writing a
5794 separate quoting function and calling it from the lookup code. The fix
5795 should probably also be applied to nisplus, ibase and oracle lookups, but
5796 since I cannot test any of those, I have not disturbed their existing code.
5798 2. A hit in the callout cache for a specific address caused a log line with no
5799 reason for rejecting RCPT. Now it says "Previous (cached) callout
5800 verification failure".
5802 3. There was an off-by-one bug in the queryprogram router. An over-long
5803 return line was truncated at 256 instead of 255 characters, thereby
5804 overflowing its buffer with the terminating zero. As well as fixing this, I
5805 have increased the buffer size to 1024 (and made a note to document this).
5807 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5808 when Exim is waiting for an SMTP response from a remote server, Exim
5809 restarts its select() call on the socket, thereby resetting its timeout.
5810 This is not a problem when such interrupts are rare. Somebody set up a cron
5811 job to run exiwhat every 2 minutes, which is less than the normal select()
5812 timeout (5 or 10 minutes). This meant that the select() timeout never
5813 kicked in because it was always reset. I have fixed this by comparing the
5814 time when an interrupt arrives with the time at the start of the first call
5815 to select(). If more time than the timeout has elapsed, the interrupt is
5816 treated as a timeout.
5818 5. Some internal re-factoring in preparation for the addition of Sieve
5819 extensions (by MH). In particular, the "personal" test is moved to a
5820 separate function, and given an option for scanning Cc: and Bcc: (which is
5821 not set for Exim filters).
5823 6. When Exim created an email address using the login of the caller as the
5824 local part (e.g. when creating a From: or Sender: header line), it was not
5825 quoting the local part when it contained special characters such as @.
5827 7. Installed new OpenBSD configuration files.
5829 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5830 try to make them clearer.
5832 9. Callout options, other than the timeout value, were being ignored when
5833 verifying sender addresses in header lines. For example, when using
5835 verify = header_sender/callout=no_cache
5837 the cache was (incorrectly) being used.
5839 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5840 only the Cygwin environment.
5842 11. When return_path_on_delivery was set as a log selector, if different remote
5843 addresses in the same message used different return paths and parallel
5844 remote delivery occurred, the wrong values would sometimes be logged.
5845 (Whenever a remote delivery process finished, the return path value from
5846 the most recently started remote delivery process was logged.)
5848 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5849 lines when AUTH and/or TLS are in use. This is the "received protocol"
5850 field. Exim used to use "asmtp" for authenticated SMTP, without any
5851 indication (in the protocol name) for TLS use. Now it follows the RFC and
5852 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5853 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5854 names appear in log lines as well as in Received: header lines.
5856 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5857 extensions, and comparison tests, and to fix some bugs.
5859 14. Changes to the "personal" filter test:
5861 (1) The test was buggy in that it was just doing the equivalent of
5862 "contains" tests on header lines. For example, if a user's address was
5863 anne@some.where, the "personal" test would incorrectly be true for
5865 To: susanne@some.where
5867 This test is now done by extracting each address from the header in turn,
5868 and checking the entire address. Other tests that are part of "personal"
5869 are now done using regular expressions (for example, to check local parts
5870 of addresses in From: header lines).
5872 (2) The list of non-personal local parts in From: addresses has been
5873 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5874 taken from the Sieve specification recommendations.
5876 (3) If the message contains any header line starting with "List-" it is
5877 treated as non-personal.
5879 (4) The test for "circular" in the Subject: header line has been removed
5880 because it now seems ill-conceived.
5882 15. Minor typos in src/EDITME comments corrected.
5884 16. Installed latest exipick from John Jetmore.
5886 17. If headers_add on a router specified a text string that was too long for
5887 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5888 of string_sprintf() is now avoided.
5890 18. $message_body_size was not set (it was always zero) when running the DATA
5891 ACL and the local_scan() function.
5893 19. For the "mail" command in an Exim filter, no default was being set for
5894 the once_repeat time, causing a random time value to be used if "once" was
5895 specified. (If the value happened to be <= 0, no repeat happened.) The
5896 default is now 0s, meaning "never repeat". The "vacation" command was OK
5897 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5898 (I found it when inspecting the code).
5900 20. There is now an overall timeout for performing a callout verification. It
5901 defaults to 4 times the callout timeout, which applies to individual SMTP
5902 commands during the callout. The overall timeout applies when there is more
5903 than one host that can be tried. The timeout is checked before trying the
5904 next host. This prevents very long delays if there are a large number of
5905 hosts and all are timing out (e.g. when the network connections are timing
5906 out). The value of the overall timeout can be changed by specifying an
5907 additional sub-option for "callout", called "maxwait". For example:
5909 verify = sender/callout=5s,maxwait=20s
5911 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5912 to the end before writing, but this should make it even safer).
5914 22. Exim was forgetting that it had advertised PIPELINING for the second and
5915 subsequent messages on an SMTP connection. It was also not resetting its
5916 memory on STARTTLS and an internal HELO.
5918 23. When Exim logs an SMTP synchronization error within a session, it now
5919 records whether PIPELINING has been advertised or not.
5921 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5922 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5923 rather than long int.
5925 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5927 26. Added the never_mail option to autoreply.
5933 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5934 crash if the getsockname() call failed; this can happen if a connection is
5935 closed very soon after it is established. The problem was simply in the
5936 order in which certain operations were done, causing Exim to try to write
5937 to the SMTP stream before it had set up the file descriptor. The bug has
5938 been fixed by making things happen in the correct order.
5944 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5945 before the connection was closed, thus losing the rejection response.
5947 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5948 some early Solaris releases, but causes trouble in current releases where
5949 socklen_t is defined.
5951 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5954 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5957 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5958 that releasing the top of it at the end releases what was used for sub-
5959 expansions (unless the block got too big). However, discard this block if
5960 the first thing is a variable or header, so that we can use its block when
5961 it is dynamic (useful for very large $message_headers, for example).
5963 6. Lookups now cache *every* query, not just the most recent. A new, separate
5964 store pool is used for this. It can be recovered when all lookup caches are
5965 flushed. Lookups now release memory at the end of their result strings.
5966 This has involved some general refactoring of the lookup sources.
5968 7. Some code has been added to the store_xxx() functions to reduce the amount
5969 of flapping under certain conditions.
5971 8. log_incoming_interface used to affect only the <= reception log lines. Now
5972 it causes the local interface and port to be added to several more SMTP log
5973 lines, for example "SMTP connection from", and rejection lines.
5975 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5977 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5979 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5980 could be overwritten at the end of the current message (or the start of a
5981 new message if it was set in a HELO ACL). The value is now preserved for
5982 the duration of the SMTP connection.
5984 12. If a transport had a headers_rewrite setting, and a matching header line
5985 contained an unqualified address, that address was qualified, even if it
5986 did not match any rewriting rules. The underlying bug was that the values
5987 of the flags that permit the existence of unqualified sender and recipient
5988 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5989 non-local messages, and by -bnq for local messages) were not being
5990 preserved with the message after it was received.
5992 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5993 "next input=" as part of the text comprising the host identity instead of
5994 the correct text. The code was using the same buffer for two different
5995 strings. However, depending on which order the printing function evaluated
5996 its arguments, the bug did not always show up. Under Linux, for example, my
5997 test suite worked just fine.
5999 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6000 doesn't work with some older versions of Perl. It has been changed to "my",
6001 which in any case is probably the better facility to use.
6003 15. A really picky compiler found some instances of statements for creating
6004 error messages that either had too many or two few arguments for the format
6007 16. The size of the buffer for calls to the DNS resolver has been increased
6008 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6009 for addresses that have a lot of PTR records. This alleviates a problem; it
6010 does not fully solve it.
6012 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6013 buffer now truncates the list and logs the incident, which is the same
6014 action as happens when Exim is looking up a host name and its aliases.
6015 Previously in this situation something unpredictable would happen;
6016 sometimes it was "internal error: store_reset failed".
6018 18. If a server dropped the connection unexpectedly when an Exim client was
6019 using GnuTLS and trying to read a response, the client delivery process
6020 crashed while trying to generate an error log message.
6022 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6023 string, for example:
6025 warn message = H1: something\nH2: something
6027 the text was added as a single header line from Exim's point of view
6028 though it ended up OK in the delivered message. However, searching for the
6029 second and subsequent header lines using $h_h2: did not work. This has been
6030 fixed. Similarly, if a system filter added multiple headers in this way,
6031 the routers could not see them.
6033 20. Expanded the error message when iplsearch is called with an invalid key to
6034 suggest using net-iplsearch in a host list.
6036 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6037 ACLs are no longer actually imposed (and a message to that effect is
6040 22. If a "gecos" field in a passwd entry contained escaped characters, in
6041 particular, if it contained a \" sequence, Exim got it wrong when building
6042 a From: or a Sender: header from that name. A second bug also caused
6043 incorrect handling when an unquoted " was present following a character
6044 that needed quoting.
6046 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6047 was not being matched caselessly.
6049 24. Arranged for all hyphens in the exim.8 source to be escaped with
6052 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6053 properly. Recipient callout cache records were still being keyed to include
6054 the sender, even when use_sender was set false. This led to far more
6055 callouts that were necessary. The sender is no longer included in the key
6056 when use_sender is false.
6058 26. Added "control = submission" modifier to ACLs.
6060 27. Added the ${base62d: operator to decode base 62 numbers.
6062 28. dnsdb lookups can now access SRV records.
6064 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6065 the configuration file.
6067 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6068 (-v) mode. This makes the output for a verbose queue run more intelligible.
6070 31. Added a use_postmaster feature to recipient callouts.
6072 32. Added the $body_zerocount variable, containing the number of binary zero
6073 bytes in the message body.
6075 33. The time of last modification of the "new" subdirectory is now used as the
6076 "mailbox time last read" when there is a quota error for a maildir
6079 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6081 35. Added +ignore_unknown as a special item in host lists.
6083 36. Code for decoding IPv6 addresses in host lists is now included, even if
6084 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6085 address was recognized as an IP address, but was then not correctly decoded
6086 into binary, causing unexpected and incorrect effects when compared with
6093 1. Very minor rewording of debugging text in manualroute to say "list of
6094 hosts" instead of "hostlist".
6096 2. If verify=header_syntax was set, and a header line with an unqualified
6097 address (no domain) and a large number of spaces between the end of the
6098 name and the colon was received, the reception process suffered a buffer
6099 overflow, and (when I tested it) crashed. This was caused by some obsolete
6100 code that should have been removed. The fix is to remove it!
6102 3. When running in the test harness, delay a bit after writing a bounce
6103 message to get a bit more predictability in the log output.
6105 4. Added a call to search_tidyup() just before forking a reception process. In
6106 theory, someone could use a lookup in the expansion of smtp_accept_max_
6107 per_host which, without the tidyup, could leave open a database connection.
6109 5. Added the variables $recipient_data and $sender_data which get set from a
6110 lookup success in an ACL "recipients" or "senders" condition, or a router
6111 "senders" option, similar to $domain_data and $local_part_data.
6113 6. Moved the writing of debug_print from before to after the "senders" test
6116 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6117 problems for message scanning, either using a data ACL, or using
6118 local_scan() because the Received: header was not generated till after they
6119 were called (in order to set the time as the time of reception completion).
6120 I have revised the way this works. The header is now generated after the
6121 body is received, but before the ACL or local_scan() are called. After they
6122 are run, the timestamp in the header is updated.
6128 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6129 before starting a queue runner without re-exec. This happened only when
6130 deliver_drop_privilege was set or when the Exim user was set to root. The
6131 effect of the bug was that timeouts during subsequent deliveries caused
6132 crashes instead of being properly handled. The handler is now left at its
6133 default (and expected) setting.
6135 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6136 message, again when deliver_drop_privilege is set or Exim is run as root.
6137 The bug described in (1) was not present in this case, but the tidying up
6138 of the other signals was missing. I have made the two cases consistent.
6140 3. The ignore_target_hosts setting on a manualroute router was being ignored
6141 for hosts that were looked up using the /MX notation.
6143 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6146 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6147 operated on the sender address. After changing the $sender_address to <>
6148 for the sender address verify, Exim was re-instated it as the original
6149 (before rewriting) address, but remembering that it had rewritten it, so it
6150 wasn't rewriting it again. This bug also had the effect of breaking the
6151 sender address verification caching when the sender address was rewritten.
6153 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6154 This has been changed so that if the ip literal address matches
6155 ignore_target_hosts, the router declines.
6157 7. Added expansion conditions match_domain, match_address, and match_local_
6158 part (NOT match_host).
6160 8. The placeholder for the Received: header didn't have a length field set.
6162 9. Added code to Exim itself and to exim_lock to test for a specific race
6163 condition that could lead to file corruption when using MBX delivery. The
6164 issue is with the lockfile that is created in /tmp. If this file is removed
6165 after a process has opened it but before that process has acquired a lock,
6166 there is the potential for a second process to recreate the file and also
6167 acquire a lock. This could lead to two Exim processes writing to the file
6168 at the same time. The added code performs the same test as UW imapd; it
6169 checks after acquiring the lock that its file descriptor still refers to
6170 the same named file.
6172 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6173 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6176 11. Added the smtp_active_hostname option. If used, this will typically be made
6177 to depend on the incoming interface address. Because $interface_address is
6178 not set up until the daemon has forked a reception process, error responses
6179 that can happen earlier (such as "too many connections") no longer contain
6182 12. If an expansion in a condition on a "warn" statement fails because a lookup
6183 defers, the "warn" statement is abandoned, and the next ACL statement is
6184 processed. Previously this caused the whole ACL to be aborted.
6186 13. Added the iplsearch lookup type.
6188 14. Added ident_timeout as a log selector.
6190 15. Added tls_certificate_verified as a log selector.
6192 16. Added a global option tls_require_ciphers (compare the smtp transport
6193 option of the same name). This controls incoming TLS connections.
6195 17. I finally figured out how to make tls_require_ciphers do a similar thing
6196 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6197 before starting the TLS session.
6199 18. Tabs are now shown as \t in -bP output.
6201 19. If the log selector return_path_on_delivery was set, Exim crashed when
6202 bouncing a message because it had too many Received: header lines.
6204 20. If two routers both had headers_remove settings, and the first one included
6205 a superfluous trailing colon, the final name in the first list and the
6206 first name in the second list were incorrectly joined into one item (with a
6207 colon in the middle).
6213 1. Added -C and -D options to the exinext utility, mainly to make it easier
6214 to include in the automated testing, but these could be helpful when
6215 multiple configurations are in use.
6217 2. The exinext utility was not formatting the output nicely when there was
6218 an alternate port involved in the retry record key, nor when there was a
6219 message id as well (for retries that were specific to a specific message
6220 and a specific host). It was also confused by IPv6 addresses, because of
6221 the additional colons they contain. I have fixed the IPv4 problem, and
6222 patched it up to do a reasonable job for IPv6.
6224 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6225 delivery, the log line now contains "pipelined" if PIPELINING was used.
6227 4. An SMTP transport process used to panic and die if the bind() call to set
6228 an explicit outgoing interface failed. This has been changed; it is now
6229 treated in the same way as a connect() failure.
6231 5. A reference to $sender_host_name in the part of a conditional expansion
6232 that was being skipped was still causing a DNS lookup. This no longer
6235 6. The def: expansion condition was not recognizing references to header lines
6236 that used bh_ and bheader_.
6238 7. Added the _cache feature to named lists.
6240 8. The code for checking quota_filecount in the appendfile transport was
6241 allowing one more file than it should have been.
6243 9. For compatibility with Sendmail, the command line option
6251 and sets the incoming protocol and host name (for trusted callers). The
6252 host name and its colon can be omitted when only the protocol is to be set.
6253 Note the Exim already has two private options, -pd and -ps, that refer to
6254 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6255 "s", but I don't think that's a major issue.
6257 10. A number of refactoring changes to the code, none of which should affect
6260 (a) The number of logging options was getting close to filling up the
6261 32-bit word that was used as a bit map. I have split them into two classes:
6262 those that are passed in the argument to log_write(), and those that are
6263 only ever tested independently outside of that function. These are now in
6264 separate 32-bit words, so there is plenty of room for expansion again.
6265 There is no change in the user interface or the logging behaviour.
6267 (b) When building, for example, log lines, the code previously used a
6268 macro that called string_cat() twice, in order to add two strings. This is
6269 not really sufficiently general. Furthermore, there was one instance where
6270 it was actually wrong because one of the argument was used twice, and in
6271 one call a function was used. (As it happened, calling the function twice
6272 did not affect the overall behaviour.) The macro has been replaced by a
6273 function that can join an arbitrary number of extra strings onto a growing
6276 (c) The code for expansion conditions now uses a table and a binary chop
6277 instead of a serial search (which was left over from when there were very
6278 few conditions). Also, it now recognizes conditions like "pam" even when
6279 the relevant support is not compiled in: a suitably worded error message is
6280 given if an attempt is made to use such a condition.
6282 11. Added ${time_interval:xxxxx}.
6284 12. A bug was causing one of the ddress fields not to be passed back correctly
6285 from remote delivery subprocesses. The field in question was not being
6286 subsequently used, so this caused to problems in practice.
6288 13. Added new log selectors queue_time and deliver_time.
6290 14. Might have fixed a bug in maildirsizefile handling that threw up
6291 "unexpected character" debug warnings, and recalculated the data
6292 unnecessarily. In any case, I expanded the warning message to give more
6295 15. Added the message "Restricted characters in address" to the statements in
6296 the default ACL that block characters like @ and % in local parts.
6298 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6299 Three changes have been made:
6301 (a) There was a serious bug; a negative response to MAIL caused the whole
6302 recipient domain to be cached as invalid, thereby blocking all messages
6303 to all local parts at the same domain, from all senders. This bug has
6304 been fixed. The domain is no longer cached after a negative response to
6305 MAIL if the sender used is not empty.
6307 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6310 (c) A new callout option, "use_sender" has been added for people who want
6311 the modified behaviour.
6317 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6320 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6321 indeed breaks things for older releases.
6323 3. Added additional logging to the case where there is a problem reading data
6324 from a filter that is running in a subprocess using a pipe, in order to
6325 try to track down a specific problem.
6327 4. Testing facility fudge: when running in the test harness and attempting
6328 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6329 getting "No route to host". Convert this to a timeout.
6331 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6334 6. Some OS don't have socklen_t but use size_t instead. This affects the
6335 fifth argument of getsockopt() amongst other things. This is now
6336 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6337 can be set for individual OS. I have set it for SunOS5, OSF1, and
6338 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6339 some earlier ones do not.
6341 7. Change 4.30/15 was not doing the test caselessly.
6343 8. The standard form for an IPv6 address literal was being rejected by address
6344 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6345 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6346 this, as well as the form without the "IPv6" on the front (but only when
6347 address literals are enabled, of course).
6349 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6351 10. Exim crashed if a message with an empty sender address specified by -f
6352 encountered a router with an errors_to setting. This could be provoked only
6353 by a command such as
6357 where an empty string was supplied; "<>" did not hit this bug.
6359 11. Installed PCRE release 4.5.
6361 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6362 remained set. It is now erased.
6364 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6365 times from message ids (which are base 36 rather than the normal 62).
6367 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6368 were being counted as actual protocol errors, and logged if the log
6369 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6370 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6371 and DATA following a set of rejected RCPTs do not count as protocol errors.
6372 In other words, Exim assumes they were pipelined, though this may not
6373 actually be the case. Of course, in all cases the client gets an
6374 appropriate error code.
6376 15. If a lookup fails in an ACL condition, a message about the failure may
6377 be available; it is used if testing the ACL cannot continue, because most
6378 such messages specify what the cause of the deferral is. However, some
6379 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6380 that caused an old message to be retained and used if a later statement
6381 caused a defer, replacing the real cause of the deferral.
6383 16. If an IP address had so many PTR records that the DNS lookup buffer
6384 was not large enough to hold them, Exim could crash while trying to process
6385 the truncated data. It now detects and logs this case.
6387 17. Further to 4.21/58, another change has been made: if (and only if) the
6388 first line of a message (the first header line) ends with CRLF, a bare LF
6389 in a subsequent header line has a space inserted after it, so as not to
6390 terminate the header.
6392 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6393 unnecessarily, used atoi() instead of strtol(), and didn't check the
6394 termination when getting file sizes from file names by regex.
6396 19. Completely re-implemented the support for maildirsize files, in the light
6397 of a number of problems with the previous contributed implementation
6398 (4.30/29). In particular:
6400 . If the quota is zero, the maildirsize file is maintained, but no quota is
6403 . If the maildir directory does not exist, it is created before any attempt
6404 to write a maildirsize file.
6406 . The quota value in the file is just a cache; if the quota is changed in
6407 the transport, the new value overrides.
6409 . A regular expression is available for excluding directories from the
6412 20. The autoreply transport checks the characters in options that define the
6413 message's headers; it allows continued headers, but it was checking with
6414 isspace() after an embedded newline instead of explicitly looking for a
6417 21. If all the "regular" hosts to which an address was routed had passed their
6418 expiry times, and had not reached their retry times, the address was
6419 bounced, even if fallback hosts were defined. Now Exim should go on to try
6422 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6423 equivalent code in the SMTP transport. Some hosts send humungous responses
6424 to HELO/EHLO, more than 1024 it seems.
6426 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6427 gives compiler warnings in some environments. I've now done it "properly",
6430 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6431 (because of problems with the built-in one) was declared to return uschar *
6432 instead of char *, causing compiler failure.
6434 25. Fixed a file descriptor leak when processing alias/forward files.
6436 26. Fixed a minor format string issue in dbfn.c.
6438 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6440 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6441 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6444 29. When a sender address is verified, it is cached, to save repeating the test
6445 when there is more than one recipient in a message. However, when the
6446 verification involves a callout, it is possible for different callout
6447 options to be set for different recipients. It is too complicated to keep
6448 track of this in the cache, so now Exim always runs a verification when a
6449 callout is required, relying on the callout cache for the optimization.
6450 The overhead is duplication of the address routing, but this should not be
6453 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6454 to be verified with callout=postmaster, and the main callout worked but the
6455 postmaster check failed, the verification correctly failed. However, if a
6456 subsequent RCPT command asked for sender verification *without* the
6457 postmaster check, incorrect caching caused this verification also to fail,
6460 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6461 it was not caching the DNS options (qualify_single, search_parents) that
6462 were used when the lookup failed. A subsequent lookup with different
6463 options therefore always gave the same answer, though there were cases
6464 where it should not have. (Example: a "domains = !$mx_any" option on a
6465 dnslookup router: the "domains" option is always processed without any
6466 widening, but the router might have qualify_single set.) Now Exim uses the
6467 cached value only when the same options are set.
6469 32. Added John Jetmore's "exipick" utility to the distribution.
6471 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6472 than a timeout (e.g. a certificate is required, and is not provided), an
6473 Exim server now closes the connection immediately. Previously it waited for
6474 the client to close - but if the client is SSL, it seems that they each
6475 wait for each other, leading to a delay before one of them times out.
6477 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6478 maintained 0.8.x compatibility because I don't think many are using it, and
6479 it is clearly obsolete.
6481 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6484 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6485 client certificate was expired. A simple patch fixes this, though I don't
6486 understand the full logic of why the verify callback is called multiple
6489 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6490 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6491 which causes problems with some clients (such as the Certicom SSL Plus
6492 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6493 disables the coutermeasure allowing Eudora to connect."
6495 38. Exim was not checking that a write() to a log file succeeded. This could
6496 lead to Bad Things if a log got too big, in particular if it hit a file
6497 size limit. Exim now panics and dies if it cannot write to a log file, just
6498 as it does if it cannot open a log file.
6500 39. Modified OS/Makefile-Linux so that it now contains
6502 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6504 The two -D definitions ensure that Exim is compiled with large file
6505 support, which makes it possible to handle log files that are bigger than
6508 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6509 instance) a domain was checked against a named list that involved a lookup,
6510 causing $domain_data to be set, then another domain was checked against the
6511 same list, then the first domain was re-checked, the value of $domain_data
6512 after the final check could be wrong. In particular, if the second check
6513 failed, it could be set empty. This bug probably also applied to
6516 41. The strip_trailing_dot option was not being applied to the address given
6517 with the -f command-line option.
6519 42. The code for reading a message's header from the spool was incrementing
6520 $received_count, but never initializing it. This meant that the value was
6521 incorrect (doubled) while delivering a message in the same process in which
6522 it was received. In the most common configuration of Exim, this never
6523 happens - a fresh exec is done - but it can happen when
6524 deliver_drop_privilege is set.
6526 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6527 it now includes up to 150 characters of the unexpected data in the log
6530 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6531 and building data strings. The size of both of these buffers was 10 000
6532 bytes - far larger than anybody would *ever* want, thought I. Needless to
6533 say, somebody hit the limit. I have increased the maximum line length to
6534 20 000 and the maximum data length of concatenated lines to 100 000. I have
6535 also fixed two bugs, because there was no checking on these buffers. Tsk,
6536 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6537 buffer is too small.
6539 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6540 lsearch lookups. Now it does.
6542 46. When parsing a route_list item in a manualroute router, a fixed-length
6543 buffer was used for the list of hosts. I made this 1024 bytes long,
6544 thinking that nobody would ever have a list of hosts that long. Wrong.
6545 Somebody had a whole pile of complicated expansion conditions, and the
6546 string was silently truncated, leading to an expansion error. It turns out
6547 that it is easier to change to an unlimited length (owing to other changes
6548 that have happened since this code was originally written) than to build
6549 structure for giving a limitation error. The length of the item that
6550 expands into the list of hosts is now unlimited.
6552 47. The lsearch lookup could not handle data where the length of text line was
6553 more than 4095 characters. Such lines were truncated, leading to shortened
6554 data being returned. It should now handle lines of any length.
6556 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6557 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6560 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6561 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6562 no longer happens in comment lines. A list of replacements is now placed
6563 at the head of all of the source files, except those whose only change is
6564 to replace PERL_COMMAND in the very first #! line.
6566 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6567 messages on the queue, with a bottom-up merge sort, using code contributed
6568 by Michael Haardt. This should make operations like -bp somewhat faster on
6569 large queues. It won't affect queue runners, except when queue_run_in_order
6572 51. Installed eximstats 1.31 in the distribution.
6574 52. Added support for SRV lookups to the dnslookup router.
6576 53. If an ACL referred to $message_body or $message_body_end, the value was not
6577 reset for any messages that followed in the same SMTP session.
6579 54. The store-handling optimization for building very long strings was not
6580 differentiating between the different store pools. I don't think this
6581 actually made any difference in practice, but I've tidied it.
6583 55. While running the routers to verify a sender address, $sender_address
6584 was still set to the sender address. This is wrong, because when routing to
6585 send a bounce to the sender, it would be empty. Therefore, I have changed
6586 it so that, while verifying a sender address, $sender_address is set to <>.
6587 (There is no change to what happens when verifying a recipient address.)
6589 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6590 target A or AAAA records (if not already returned) without resetting the
6591 qualify_single or search_parents options of the DNS resolver. These are
6592 inappropriate in this case because the targets of MX and SRV records must
6593 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6594 target that, when qualified, matched something in the local domain. These
6595 two options are now turned off when doing these lookups.
6597 57. It seems that at least some releases of Reiserfs (which does not have the
6598 concept of a fixed number of inodes) returns zero and not -1 for the
6599 number of available inodes. This interacted badly with check_spool_inodes,
6600 which assumed that -1 was the "no such thing" setting. What I have done is
6601 to check that the total number of inodes is greater than zero before doing
6602 the test of how many are available.
6604 58. When a "warn" ACL statement has a log_message modifier, the message is
6605 remembered, and not repeated. This is to avoid a lot of repetition when a
6606 message has many recipients that cause the same warning to be written.
6607 However, Exim was preserving the list of already written lines for an
6608 entire SMTP session, which doesn't seem right. The memory is now reset if a
6609 new message is started.
6611 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6612 debugging output unless log_rewrite was also set.
6614 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6615 of (int)(handle) when we know that handle contains (void *)(-1).
6617 61. The Exim daemon panic-logs an error return when it closes the incoming
6618 connection. However "connection reset by peer" seems to be common, and
6619 isn't really an error worthy of noting specially, so that particular error
6622 62. When Exim is trying to find all the local interfaces, it used to panic and
6623 die if the ioctl to get the interface flags failed. However, it seems that
6624 on at least one OS (Solaris 9) it is possible to have an interface that is
6625 included in the list of interfaces, but for which you get a failure error
6626 for this call. This happens when the interface is not "plumbed" into a
6627 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6628 failure of the "get flags" call assumes that the interface is down.
6630 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6631 makes life easier for people who are doing arithmetic on fields extracted
6632 from dates, where you often get leading zeros that should not be
6633 interpreted as octal.
6635 64. Added qualify_domain to the redirect router, to override the global
6638 65. If a pathologically long header line contained very many addresses (the
6639 report of this problem mentioned 10 000) and each of them was rewritten,
6640 Exim could use up a very large amount of memory. (It kept on making new
6641 copies of the header line as it rewrote, and never released the old ones.)
6642 At the expense of a bit more processing, the header rewriting function has
6643 been changed so that it no longer eats memory in this way.
6645 66. The generation of the Received: header has been moved from the time that a
6646 message starts to be received, to the time that it finishes. The timestamp
6647 in the Received: header should now be very close to that of the <= log
6648 line. There are two side-effects of this change:
6650 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6651 logged header lines no longer include the local Received: line, because
6652 it has not yet been created. The same applies to a copy of the message
6653 that is returned to a non-SMTP sender when a message is rejected.
6655 (b) When a filter file is tested using -bf, no additional Received: header
6656 is added to the test message. After some thought, I decided that this
6659 This change does not affect the value of $received_for. It is still set
6660 after address rewriting, but before local_scan() is called.
6662 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6664 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6665 gave an unhelpful panic error message, and a defer error. I have managed to
6666 change this behaviour so that it now rejects any supplied certificate,
6667 which seems right, as the list of acceptable certificates is empty.
6669 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6670 gave an unhelpful defer error. I have not managed to make this reject any
6671 supplied certificates, but the error message it gives is "no certificate
6672 supplied", which is not helpful.
6674 70. exigrep's output now also includes lines that are not associated with any
6675 message, but which match the given pattern. Implemented by a patch from
6676 Martin Sluka, which also tidied up the Perl a bit.
6678 71. Recipient callout verification, like sender verification, was using <> in
6679 the MAIL FROM command. This isn't really the right thing, since the actual
6680 sender may affect whether the remote host accepts the recipient or not. I
6681 have changed it to use the actual sender in the callout; this means that
6682 the cache record is now keyed on a recipient/sender pair, not just the
6683 recipient address. There doesn't seem to be a real danger of callout loops,
6684 since a callout by the remote host to check the sender would use <>.
6685 [SEE ABOVE: changed after hitting problems.]
6687 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6688 temporary errors. However, in the case of such a code being given after
6689 the end of a data transmission (i.e. after ".") Exim was failing to write
6690 a retry record for the message. (Yes, there was some broken host that was
6691 actually sending 8xx at this point.)
6693 73. An unknown lookup type in a host list could cause Exim to panic-die when
6694 the list was checked. (An example that provoked this was putting <; in the
6695 middle of a list instead of at the start.) If this happened during a DATA
6696 ACL check, a -D file could be left lying around. This kind of configuration
6697 error no longer causes Exim to die; instead it causes a defer error. The
6698 incident is still logged to the main and panic logs.
6700 74. Buglet left over from Exim 3 conversion. The message "too many messages
6701 in one connection" was written to the rejectlog but not the mainlog, except
6702 when address rewriting (yes!) was being logged.
6704 75. Added write_rejectlog option.
6706 76. When a system filter was run not as root (that is, when system_filter_user
6707 was set), the values of the $n variables were not being returned to the
6708 main process; thus, they were not subsequently available in the $sn
6711 77. Added +return_path_on_delivery log selector.
6713 78. A connection timeout was being treated differently from recipients deferred
6714 when testing hosts_max_try with a message that was older than the host's
6715 retry timeout. (The host should not be counted, thus allowing all hosts to
6716 be tried at least once before bouncing.) This may have been the cause of an
6717 occasionally reported bug whereby a message would remain on the queue
6718 longer than the retry timeout, but would be bounced if a delivery was
6719 forced. I say "may" because I never totally pinned down the problem;
6720 setting up timeout/retry tests is difficult. See also the next item.
6722 79. The ultimate address timeout was not being applied to errors that involved
6723 a combination of host plus message (for example, a timeout on a MAIL
6724 command). When an address resolved to a number of possible hosts, and they
6725 were not all tried for each delivery (e.g. because of hosts_max_try), a
6726 message could remain on the queue longer than the retry timeout.
6728 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6731 81. Fixed an obscure SMTP outgoing bug which required at least the following
6732 conditions: (a) there was another message waiting for the same server;
6733 (b) the server returned 5xx to all RCPT commands in the first message so
6734 that the message was not completed; (c) the server dropped the connection
6735 or gave a negative response to the RSET that Exim sends to abort the
6736 transaction. The observed case was a dropped connection after DATA that had
6737 been sent in pipelining mode. That is, the server had advertised PIPELINING
6738 but was not implementing it correctly. The effect of the bug was incorrect
6739 behaviour, such as trying another host, and this could lead to a crash.
6745 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6746 and daemon.c were passed as pointers to ints; they should have been
6747 pointers to socklen_t variables (which are typically unsigned ints).
6749 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6752 3. Fixed a really odd bug that affected only the testing scheme; patching a
6753 certain fixed string in the binary changed the value of another string that
6754 happened to be identical to the end of the original first string.
6756 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6757 name", it returns that address as the IP address. On some operating
6758 systems (e.g. Solaris), it also passes back the IP address string as the
6759 "host name". However, on others (e.g. Linux), it passes back an empty
6760 string. Exim wasn't checking for this, and was changing the host name to an
6761 empty string, assuming it had been canonicalized.
6763 5. Although rare, it is permitted to have more than one PTR record for a given
6764 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6765 all the names associated with an address, because they do in Solaris.
6766 However, it seems that they do not in Linux for data that comes from the
6767 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6768 I found this out when I moved to a new Linux workstation and tried to run
6769 the Exim test suite.
6771 To get round this problem I have changed the code so that it now does its
6772 own call to the DNS to look up PTR records when searching for a host name.
6773 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6774 addresses that are only in /etc/hosts are still found.
6776 This behaviour is, however, controlled by an option called host_lookup_
6777 order, which defaults to "bydns:byaddr". If people want to use the other
6778 order, or indeed, just use one or the other means of lookup, they can
6779 specify it in this variable.
6781 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6782 some operating systems, this comes back from gethostbyaddr() as an empty
6783 string, and this is what Exim used to test for. However, it seems that in
6784 other systems, "." is yielded. Exim now tests for this case too.
6786 7. The values of check_spool_space and check_log_space are now held internally
6787 as a number of kilobytes instead of an absolute number of bytes. If a
6788 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6789 kilobyte. This means that much larger values can be stored.
6791 8. Exim monitor: an attempt to get the action menu when not actually pointing
6792 at a message produces an empty menu entitled "No message selected". This
6793 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6794 no entries in it ("Shell widget menu has zero width and/or height"). So I
6795 have added a single, blank menu entry in this case.
6797 9. Added ${quote_local_part.
6799 10. MIME decoding is now applied to the contents of Subject: header lines when
6802 11. Now that a reference to $sender_host_address automatically causes a reverse
6803 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6804 host lookup before query-style lookups in lists that might use this
6805 variable. This has therefore been abolished, and the "net-" prefix is no
6806 longer necessary for query-style lookups.
6808 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6809 have been a typo for LFLAGS, so it has been changed.
6811 13. The install script calls Exim with "-C /dev/null" in order to find the
6812 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6813 to be output. However, since Exim outputs its version number before the
6814 error, it didn't break the script. It just looked ugly. I fixed this by
6815 always allowing "-C /dev/null" if the caller is root.
6817 14. Ignore overlarge ACL variable number when reading spool file - insurance
6818 against a later release with more variables having written the file.
6820 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6821 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6822 this, as well as the form without the "IPv6" on the front.
6824 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6825 OS/Makefile-Darwin file.
6827 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6828 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6830 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6831 variable. However, some OS use ints for inodes. I've added cast to long int
6832 to get rid of the compiler warning.
6834 19. I had forgotten to lock out "/../" in configuration file names when
6835 ALT_CONFIG_PREFIX was set.
6837 20. Routers used for verification do not need to specify transports. However,
6838 if such a router generated a host list, and callout was configured, Exim
6839 crashed, because it could not find a port number from the (non-existent)
6840 transport. It now assumes port 25 in this circumstance.
6842 21. Added the -t option to exigrep.
6844 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6845 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6846 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6847 them is set, LOOKUP_LSEARCH is forced.
6849 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6851 24. Added sender and host information to the "rejected by local_scan()" log
6852 line; previously there was no indication of these.
6854 25. Added .include_if_exists.
6856 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6857 Linux. It turns out that not all file systems support this. Apparently some
6858 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6859 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6860 not supported on the file descriptor, is now ignored when Exim is trying to
6861 sync a directory. This applies only to Linux.
6863 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6865 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6866 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6869 29. Added support for maildirsize files from supplied patch (modified a bit).
6871 30. The use of :fail: followed by an empty string could lead Exim to respond to
6872 sender verification failures with (e.g.):
6874 550 Verification failed for <xxx>
6875 550 Sender verify failed
6877 where the first response line was missing the '-' that indicates it is not
6878 the final line of the response.
6880 31. The loop for finding the name of the user that called Exim had a hardwired
6881 limit of 10; it now uses the value of finduser_retries, which is used for
6882 all other user lookups.
6884 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6887 33. Exim was neglecting to zero errno before one call of strtol() when
6888 expanding a string and expecting an integer value. On some systems this
6889 resulted in spurious "integer overflow" errors. Also, it was casting the
6890 result into an int without checking.
6892 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6893 did not work. The code looks as if it has *never* worked, though it appears
6894 to have been documented since at least release 1.62. I have made it work.
6896 35. The "timeout_DNS" error in retry rules, also documented since at least
6897 1.62, also never worked. As it isn't clear exactly what this means, and
6898 clearly it isn't a major issue, I have abolished the feature by treating it
6899 as "timeout", and writing a warning to the main and panic logs.
6901 36. The display of retry rules for -brt wasn't always showing the error code
6904 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6905 timeout_connect_A, timeout_connect_MX.
6907 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6908 to the empty sender.
6910 39. The daemon was not analysing the content of -oX till after it had closed
6911 stderr and disconnected from the controlling terminal. This meant that any
6912 syntax errors were only noted on the panic log, and the return code from
6913 the command was 0. By re-arranging the code a little, I've made the
6914 decoding happen first, so such errors now appear on stderr, and the return
6915 code is 1. However, the actual setting up of the sockets still happens in
6916 the disconnected process, so errors there are still only recorded on the
6919 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6920 connections (as happens on some IP stacks) was logged at start up time as
6921 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6922 it from "IPv6 and IPv4", which means that two separate sockets are being
6925 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6926 says whether AF_INET or AF_INET6 was passed as an argument.
6928 42. Exiwhat output was messed up when time zones were included in log
6931 43. Exiwhat now gives more information about the daemon's listening ports,
6932 and whether -tls-on-connect was used.
6934 44. The "port" option of the smtp transport is now expanded.
6936 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6937 silently ignored. Now an error message is written to the main and panic
6940 46. There's a new ACL modifier called "logwrite" which writes to a log file
6941 as soon as it is encountered.
6943 47. Added $local_user_uid and $local_user_gid at routing time.
6945 48. Exim crashed when trying to verify a sender address that was being
6948 49. Exim was recognizing only a space character after ".include". It now also
6949 recognizes a tab character.
6951 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6952 extracting the relevant information from the specification. The man page no
6953 longer contains scrambled data for the -d option, and I've added a section
6954 at the front about calling Exim under different names.
6956 51. Added "extra_headers" argument to the "mail" command in filter files.
6958 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6961 53. Installed eximstats 1.29.
6963 54. Added transport_filter_timeout as a generic transport option.
6965 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6966 Cc: header lines. This was required by RFC 822, but it not required by RFC
6969 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6970 incoming messages that did not have them. Now it does so only if the
6971 message originates locally, that is, if there is no associated remote host
6972 address. When Resent- header lines are present, this applies to the Resent-
6973 lines rather than the non-Resent- lines.
6975 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6976 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6978 58. Messages for configuration errors now include the name of the main
6979 configuration file - useful now that there may be more than one file in a
6980 list (.included file names were always shown).
6982 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6983 for those rare installations that do not start the daemon as root or run it
6984 setuid root. I've cut out the call to initgroups() if the daemon is not
6987 60. The Exim user and group can now be bound into the binary as text strings
6988 that are looked up at the start of Exim's processing.
6990 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6992 62. Added $mailstore_basename variable.
6994 63. Installed patch to sieve.c from Michael Haardt.
6996 64. When Exim failed to open the panic log after failing to open the main log,
6997 the original message it was trying to log was written to stderr and debug
6998 output, but if they were not available (the usual case in production), it
6999 was lost. Now it is written to syslog before the two lines that record the
7000 failures to open the logs.
7002 65. Users' Exim filters run in subprocesses under the user's uid. It is
7003 possible for a "deliver" command or an alias in a "personal" command to
7004 provoke an address rewrite. If logging of address rewriting is configured,
7005 this fails because the process is not running as root or exim. There may be
7006 a better way of dealing with this, but for the moment (because 4.30 needs
7007 to be released), I have disabled address rewrite logging when running a
7008 filter in a non-root, non-exim process.
7014 1. The buildconfig auxiliary program wasn't quoting the value set for
7015 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7016 not defined. This bug was masked in 4.22 by the effect that was fixed in
7019 2. Some messages that were rejected after a message id was allocated were
7020 shown as "incomplete" by exigrep. It no longer does this for messages that
7021 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7023 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7024 have allow_domain_literals set, the ID did not get logged in the <= line.
7025 Domain literals are now always recognized in Message-ID: header lines.
7027 4. The first argument for a ${extract expansion item is the key name or field
7028 number. Leading and trailing spaces in this item were not being ignored,
7029 causing some misleading effects.
7031 5. When deliver_drop_privilege was set, single queue runner processes started
7032 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7033 same command in the process it spins off) were not dropping privilege.
7035 6. When the daemon running as "exim" started a queue runner, it always
7036 re-executed Exim in the spun-off process. This is a waste of effort when
7037 deliver_drop_privilege is set. The new process now just calls the
7038 queue-runner function directly.
7044 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7047 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7048 ignored. Though the use of -oP was forcing the writing of a pid file, it
7049 was always written to the default place.
7051 3. If the message "no IP address found for host xxxx" is generated during
7052 incoming verification, it is now followed by identification of the incoming
7053 connection (so you can more easily find what provoked it).
7055 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7057 5. Added some features to "harden" Exim a bit more against certain attacks:
7059 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7060 be put in Local/Makefile. This is like the never_users runtime option,
7061 but it cannot be overridden. The default setting is "root".
7063 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7064 prefix string with which any file named in a -C command line option
7067 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7068 is retained for -C and -D only if the caller of Exim is root. Without
7069 it, the exim user may also use -C and -D and retain privilege.
7071 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7072 command line option is disabled.
7074 6. Macro names set by the -D option must start with an upper case letter, just
7075 like macro names defined in the configuration file.
7077 7. Added "dereference=" facility to LDAP.
7079 8. Two instances of the typo "uknown" in the source files are fixed.
7081 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7082 the Configure-Makefile script screwed up while processing it.
7084 10. Incorporated PCRE 4.4.
7086 11. The SMTP synchronization check was not operating right at the start of an
7087 SMTP session. For example, it could not catch a HELO sent before the client
7088 waited for the greeting. There is now a check for outstanding input at the
7089 point when the greeting is written. Because of the duplex, asynchronous
7090 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7091 way, but not yet received, when the check is performed.
7093 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7094 on TCP/IP sockets, because this apparently causes some broken clients to
7097 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7098 unchanged) from the Cygwin maintainer.
7100 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7101 was supported instead of testing for mbx. Effectively a typo.
7103 15. The spa authenticator server code was not checking that the input it
7104 received was valid base64.
7106 16. The debug output line for the "set" modifier in ACLs was not showing the
7107 name of the variable that was being set.
7109 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7111 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7112 lookup on its own. Something else was needed to trigger the lookup. For
7113 example, a match in host_lookup or the need for a host name in a host list.
7114 Now, if $sender_host_name is referenced and the host name has not yet been
7115 looked up, a lookup is performed. If the lookup fails, the variable remains
7116 empty, and $host_lookup_failed is set to "1".
7118 19. Added "eqi" as a case-independent comparison operator.
7120 20. The saslauthd authentication condition could segfault if neither service
7121 nor realm was specified.
7123 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7124 error message that was logged was misleading, and incoming SMTP
7125 connections were dropped. The message is now more accurate, and temporary
7126 errors are given to SMTP connections.
7128 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7129 (except RSET) with a 421 error, until QUIT is received. However, it was
7130 failing to send a response to QUIT.
7132 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7133 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7134 ACL is now run after the helo_try_verify_hosts code.
7136 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7137 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7138 case-independent, so other case variants are also recognized). Apparently
7139 some systems use these upper case variants.
7141 25. If more than two messages were waiting for the same host, and a transport
7142 filter was specified for the transport, Exim sent two messages over the
7143 same TCP/IP connection, and then failed with "socket operation on non-
7144 socket" when it tried to send the third.
7146 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7148 27. The extern definition of crypt16() in expand.c was not being excluded when
7149 the OS had its own crypt16() function.
7151 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7152 as a preferred synonym for return_size_limit, both as an option and as an
7155 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7157 30. Changed the default configuration ACL to relax the local part checking rule
7158 for addresses that are not in any local domains. For these addresses,
7159 slashes and pipe symbols are allowed within local parts, but the sequence
7160 /../ is explicitly forbidden.
7162 31. SPA server authentication was not clearing the challenge buffer before
7165 32. log_message in a "warn" ACL statement was writing to the reject log as
7166 well as to the main log, which contradicts the documentation and doesn't
7167 seem right (because no rejection is happening). So I have stopped it.
7169 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7170 However, I am unable to do any testing of this.
7172 34. Fixed an infelicity in the appendfile transport. When checking directories
7173 for a mailbox, to see if any needed to be created, it was accidentally
7174 using path names with one or more superfluous leading slashes; tracing
7175 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7177 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7178 contents are added to the log line that is written for every discarded
7179 recipient. (Previously a log_message setting was ignored.)
7181 36. The ${quote: operator now quotes the string if it is empty.
7183 37. The install script runs exim in order to find its version number. If for
7184 some reason other than non-existence or emptiness, which it checks, it
7185 could not run './exim', it was installing it with an empty version number,
7186 i.e. as "exim-". This error state is now caught, and the installation is
7189 38. An argument was missing from the function that creates an error message
7190 when Exim fails to connect to the socket for saslauthd authentication.
7191 This could cause Exim to crash, or give a corrupted message.
7193 39. Added isip, isip4, and isip6 to ${if conditions.
7195 40. The ACL variables $acl_xx are now saved with the message, and can be
7196 accessed later in routers, transports, and filters.
7198 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7199 strings in the file are not string-expanded.
7201 42. If a MAIL command specified a SIZE value that was too large to fit into an
7202 int variable, the check against message_size_limit failed. Such values are
7203 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7204 day this will have to be increased, but I don't think I want to be around
7205 when emails are that large.
7212 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7213 iconv() is not standard in FreeBSD.
7215 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7216 IPv6 enabled. The observed symptom was a segmentation fault on return from
7217 the function os_common_find_running_interfaces() in src/os.c.
7219 3. In the check_special_case() function in daemon.c I had used "errno" as an
7220 argument name, which causes warnings on some systems. This was basically a
7221 typo, since it was named "eno" in the comments!
7223 4. The code that waits for the clock to tick (at a resolution of some fraction
7224 of a second) so as to ensure message-id uniqueness was always waiting for
7225 at least one whole tick, when it could have waited for less. [This is
7226 almost certainly not relevant at current processor speeds, where it is
7227 unlikely to ever wait at all. But we try to future-proof.]
7229 5. The function that sleeps for a time interval that includes fractions of a
7230 second contained a race. It did not block SIGALRM between setting the
7231 timer, and suspending (a couple of lines later). If the interval was short
7232 and the sigsuspend() was delayed until after it had expired, the suspension
7233 never ended. On busy systems this could lead to processes getting stuck for
7236 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7237 process, before it forks any delivery processes. The open lookup caching
7238 mechanism meant that the open file or database connection was passed into
7239 the delivery process. The problem was that delivery processes always tidy
7240 up cached lookup data. This could cause a problem for the next delivery
7241 process started by the queue runner, because the external queue runner
7242 process does not know about the closure. So the next delivery process
7243 still has data in the lookup cache. In the case of a file lookup, there was
7244 no problem because closing a file descriptor in a subprocess doesn't affect
7245 the parent. However, if the lookup was caching a connection to a database,
7246 the connection was closed, and the second delivery process was likely to
7247 see errors such as "PGSQL: query failed: server closed the connection
7248 unexpectedly". The problem has been fixed by closing all cached lookups
7249 in a queue runner before running a delivery process.
7251 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7252 seem to have the "const" qualifier which it has on other OS. I've
7255 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7256 *of the same type* (client or server) with the same public name that an
7257 error should be diagnosed.
7259 9. When Exim looked up a host name for an IP address, but failed to find the
7260 original IP address when looking up the host name (a safety check), it
7261 output the message "<ip address> does not match any IP for NULL", which was
7262 confusing, to say the least. The bug was that the host name should have
7263 appeared instead of "NULL".
7265 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7266 user that is built into the binary, and the -C or -D options is used, root
7267 privilege is dropped before the configuration file is read. In addition,
7268 logging is switched to stderr instead of the normal log files. If the
7269 configuration then re-defines the Exim user, the unprivileged environment
7270 is probably not what is expected, so Exim logs a panic warning message (but
7273 However, if deliver_drop_privilege is set, the unprivileged state may well
7274 be exactly what is intended, so the warning has been cut out in that case,
7275 and Exim is allowed to try to write to its normal log files.
7281 1. smtp_return_error_details was not giving details for temporary sender
7282 or receiver verification errors.
7284 2. Diagnose a configuration error if two authenticators have the same public
7287 3. Exim used not to create the message log file for a message until the first
7288 delivery attempt. This could be confusing when incoming messages were held
7289 for policy or load reasons. The message log file is now created at the time
7290 the message is received, and an initial "Received" line is written to it.
7292 4. The automatically generated man page for command line options had a minor
7293 bug that caused no ill effects; however, a more serious problem was that
7294 the procedure for building the man page automatically didn't always
7295 operate. Consequently, release 4.20 contains an out-of-date version. This
7296 shouldn't happen again.
7298 5. When building Exim with embedded Perl support, the script that builds the
7299 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7300 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7302 6. The freeze_tell option was not being used for messages that were frozen on
7303 arrival, either by an ACL or by local_scan().
7305 7. Added the smtp_incomplete_transaction log selector.
7307 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7308 was accepting AUTH without a new EHLO.
7310 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7311 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7314 10. Logging of TCP/IP connections (when configured) now happens in the main
7315 daemon process instead of the child process, so that the TCP/IP connection
7316 count is more accurate (but it can never be perfect).
7318 11. The use of "drop" in a nested ACL was not being handled correctly in the
7319 outer ACL. Now, if condition failure induced by the nested "drop" causes
7320 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7321 or "require"), the connection is dropped.
7323 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7324 that yield "discard" can now be used with an "accept" or a "discard" verb,
7325 but an error is generated for any others (because I can't see a useful way
7326 to define what should happen).
7328 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7329 are now processed in the same way as lines in the Exim configuration file.
7330 In particular, continuation lines are supported.
7332 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7334 15. Added -ti meaning -t -i.
7336 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7337 domains, and warn by logging if others are found.
7339 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7340 returned from GIFCONF when Exim is trying to find the list of interfaces on
7341 a host. The code in os.c has been modified to copy each ifreq to an aligned
7342 structure in all cases.
7344 Also, in some cases, the returned ifreq's were being copied to a 'struct
7345 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7346 means the last couple of bytes of an IPv6 address could be chopped if the
7347 ifreq contained only a normal sockaddr (14 bytes storage).
7349 18. Named domain lists were not supported in the hosts_treat_as_local option.
7350 An entry such as +xxxx was not recognized, and was treated as a literal
7353 19. Ensure that header lines added by a DATA ACL are included in the reject log
7354 if the ACL subsequently rejects the message.
7356 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7357 MD5 (which is deprecated).
7359 21. When testing a filter file using -bf, Exim was writing a message when it
7360 took the sender from a "From " line in the message, but it was not doing so
7361 when it took $return_path from a Return-Path: header line. It now does.
7363 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7364 with a valid header line field name (a series of printing characters
7365 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7367 23. Changed "disc" in the source to "disk" to conform to the documentation and
7368 the book and for uniformity.
7370 24. Ignore Sendmail's -Ooption=value command line item.
7372 25. When execve() failed while trying to run a command in a pipe transport,
7373 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7374 could be confused with a return value of 69 from the command itself. This
7375 has been changed to 127, the value the shell returns if it is asked to run
7376 a non-existent command. The wording for the related log line suggests a
7377 non-existent command as the problem.
7379 26. If received_header_text expands to an empty string, do not add a Received:
7380 header line to the message. (Well, it adds a token one on the spool, but
7381 marks it "old" so that it doesn't get used or transmitted.)
7383 27. Installed eximstats 1.28 (addition of -nt option).
7385 28. There was no check for failure on the call to getsockname() in the daemon
7386 code. This can fail if there is a shortage of resources on the system, with
7387 ENOMEM, for example. A temporary error is now given on failure.
7389 29. Contrary to the C standard, it seems that in some environments, the
7390 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7391 program. Exim now does this explicitly; it affects the formatting of
7392 timestamps using strftime().
7394 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7395 complaints. I've now initialized all the variables, to avoid this.
7397 32. Header lines added by a system filter were not being "seen" during
7398 transport-time rewrites.
7400 33. The info_callback() function passed to OpenSSL is set up with type void
7401 (*)(SSL *, int, int), as described somewhere. However, when calling the
7402 function (actually a macro) that sets it up, the type void(*)() is
7403 expected. I've put in a cast to prevent warnings from picky compilers.
7405 34. If a DNS black list lookup found a CNAME record, but there were no A
7406 records associated with the domain it pointed at, Exim crashed.
7408 35. If a DNS black list lookup returned more than one A record, Exim ignored
7409 all but the first. It now scans all returned addresses if a particular IP
7410 value is being sought. In this situation, the contents of the
7411 $dnslist_value variable are a list of all the addresses, separated by a
7414 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7415 to accept a host name and all its aliases if the forward lookup for any of
7416 them yielded the IP address of the incoming connection. Now it accepts only
7417 those names whose forward lookup yields the correct IP address. Any other
7418 names are discarded. This closes a loophole whereby a rogue DNS
7419 administrator could create reverse DNS records to break through a
7420 wildcarded host restriction in an ACL.
7422 37. If a user filter or a system filter that ran in a subprocess used any of
7423 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7424 the wrong values were passed to the pipe command ($thisaddress had the
7425 value of $0, $0 had the value of $1, etc). This bug was introduced by
7426 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7428 38. Improved the line breaking for long SMTP error messages from ACLs.
7429 Previously, if there was no break point between 40 and 75 characters, Exim
7430 left the rest of the message alone. Two changes have been made: (a) I've
7431 reduced the minimum length to 35 characters; (b) if it can't find a break
7432 point between 35 and 75 characters, it looks ahead and uses the first one
7433 that it finds. This may give the occasional overlong line, but at least the
7434 remaining text gets split now.
7436 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7437 file descriptors might be low, and that setting 1000 would always raise it.
7438 It turns out that in some environments, the limit is already over 1000 and
7439 that lowering it causes trouble. So now Exim takes care not to decrease it.
7441 40. When delivering a message, the value of $return_path is set to $sender_
7442 address at the start of routing (routers may change the value). By an
7443 oversight, this default was not being set up when an address was tested by
7444 -bt or -bv, which affected the outcome if any router or filter referred to
7447 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7448 log only when "message" or "log_message" are set. However, if one of the
7449 conditions was an address verification, or a call to a nested ACL, the
7450 messages generated by the underlying test were being passed through. This
7451 no longer happens. The underlying message is available in $acl_verify_
7452 message for both "message" and "log_message" expansions, so it can be
7453 passed through if needed.
7455 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7456 new expansion $bh_ to give the encoded byte string without charset
7457 translation. Translation happens only if iconv() is available; HAVE_ICONV
7458 indicates this at build time. HEADERS_CHARSET gives the charset to
7459 translate to; headers_charset can change it in the configuration, and
7460 "headers charset" can change it in an individual filter file.
7462 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7463 that creates RFC 2047 encoded "words" labels them as that charset instead
7464 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7465 expansion operator; (ii) when Exim creates a From: line for a local
7466 message; (iii) when a header line is rewritten to include a "phrase" part.
7468 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7469 buggy, causing it to skip the first lines of messages whose message ID
7470 ended in 'D'. This would not have bitten before Exim release 4.14, because
7471 message IDs were unlikely to end in 'D' before then. The effect was to have
7472 incorrect size information for certain domains.
7474 45. #include "config.h" was missing at the start of the crypt16.c module. This
7475 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7478 46. If there was a timeout during a "random" callout check, Exim treated it as
7479 a failure of the random address, and carried on sending RSET and the real
7480 address. If the delay was just some slowness somewhere, the response to the
7481 original RCPT would be taken as a response to RSET and so on, causing
7482 mayhem of various kinds.
7484 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7485 when I implemented it. It didn't allow for the fact that some option values
7486 may legitimately be negative (e.g. size_addition), and it didn't even do
7487 the right test for positive values.
7489 48. Domain names in DNS records are case-independent. Exim always looks them up
7490 in lower case. Some resolvers return domain names in exactly the case they
7491 appear in the zone file, that is, they may contain uppercase letters. Not
7492 all resolvers do this - some return always lower case. Exim was treating a
7493 change of case by a resolver as a change of domain, similar to a widening
7494 of a domain abbreviation. This triggered its re-routing code and so it was
7495 trying to route what was effectively the same domain again. This normally
7496 caused routing to fail (because the router wouldn't handle the domain
7497 twice). Now Exim checks for this case specially, and just changes the
7498 casing of the domain that it ultimately uses when it transmits the message
7501 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7504 50. If a filter generated a file delivery with a non-absolute name (possible if
7505 no home directory exists for the router), the forbid_file option was not
7508 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7509 the existing equality matching.
7511 52. Exim was using ints instead of ino_t variables in some places where it was
7512 dealing with inode numbers.
7514 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7515 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7516 called TMPDIR, and if it finds it is different, it changes its value.
7518 54. The smtp_printf() function is now made available to local_scan() so
7519 additional output lines can be written before returning. There is also an
7520 smtp_fflush() function to enable the detection of a dropped connection.
7521 The variables smtp_input and smtp_batched_input are exported to
7524 55. Changed the default runtime configuration: the message "Unknown user"
7525 has been removed from the ACL, and instead placed on the localuser router,
7526 using the cannot_route_message feature. This means that any verification
7527 failures that generate their own messages won't get overridden. Similarly,
7528 the "Unrouteable address" message that was in the ACL for unverifiable
7529 relay addresses has also been removed.
7531 56. Added hosts_avoid_esmtp to the smtp transport.
7533 57. The exicyclog script was not checking for the esoteric option
7534 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7535 will work only if exicyclog is run under the appropriate euid.
7537 58. Following a discussion on the list, the rules by which Exim recognises line
7538 endings on incoming messages have been changed. The -dropcr and drop_cr
7539 options are now no-ops, retained only for backwards compatibility. The
7540 following line terminators are recognized: LF CRLF CR. However, special
7541 processing applies to CR:
7543 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7544 nor a local message in the state where . is a terminator.
7546 (ii) If a bare CR is encountered in a header line, an extra space is added
7547 after the line terminator so as not to end the header. The reasoning
7548 behind this is that bare CRs in header lines are most likely either
7549 to be mistakes, or people trying to play silly games.
7551 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7552 was being incorrectly given as 18 bytes larger than it should have been.
7553 This is a VOB (very old bug).
7555 60. This may never have affected anything current, but just in case it has:
7556 When the local host is found other than at the start of a list of hosts,
7557 the local host, those with the same MX, and any that follow, are discarded.
7558 When the list in question was part of a longer list of hosts, the following
7559 hosts (not currently being processed) were also being discarded. This no
7560 longer happens. I'm not sure if this situation could ever has previously
7563 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7566 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7567 header. This is something that is recommended in a new Internet Draft, and
7568 is something that is documented as being done by Sendmail. There are two
7569 possible values. For messages generated by the autoreply transport, Exim
7572 Auto-Submitted: auto-replied
7574 whereas for all other generated messages (e.g. bounces) it adds
7576 Auto-Submitted: auto-generated
7578 63. The "personal" condition in filters now includes a test for the
7579 Auto-Submitted: header. If it contains the string "auto-" the message it
7580 not considered personal.
7582 64. Added rcpt_include_affixes as a generic transport option.
7584 65. Added queue_only_override (default true).
7586 66. Added the syslog_duplication option.
7588 67. If what should have been the first header line of a message consisted of
7589 a space followed by a colon, Exim was mis-interpreting it as a header line.
7590 It isn't of course - it is syntactically invalid and should therefore be
7591 treated as the start of the message body. The misbehaviour could have
7592 caused a number of strange effects, including loss of data in subsequent
7593 header lines, and spool format errors.
7595 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7596 client host had authenticated. This control can now be exercised by an ACL
7597 for more flexibility.
7599 69. By default, callouts do not happen when testing with -bh. There is now a
7600 variant, -bhc, which does actually run the callout code, including
7601 consulting and updating the callout cache.
7603 70. Added support for saslauthd authentication, courtesy of Alexander
7606 71. If statvfs() failed on the spool or log directories while checking their
7607 size for availability, Exim confusingly gave the error "space shortage".
7608 Furthermore, in debugging mode it crashed with a floating point exception.
7609 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7610 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7611 serious problem, Exim now writes to the main and panic logs when this
7612 happens, with details of the failure. It then refuses to accept the
7613 incoming message, giving the message "spool directory problem" or "log
7614 directory problem" with a 421 code for SMTP messages.
7616 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7617 0, 1, and 2 exist, because some OS complain for execs without them (see
7618 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7619 descriptors. However, the code omitted to check that the open succeeded,
7620 causing mysterious errors if for some reason the permissions on /dev/null
7621 got screwed. Now Exim writes a message to the main and panic logs, and
7622 bombs out if it can't open /dev/null.
7624 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7625 interact so that it is all more flexible. It is supposed to remain
7626 backwards compatible. Also added extra_local_interfaces.
7628 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7629 to bomb out with an assertion failure - to the client this appears as a
7630 connection drop. This problem occurs in the part of the code that was taken
7631 from the Samba project. Fortunately, the assertion is in a very simple
7632 function, so I have fixed this by reproducing the function inline in the
7633 one place where it is called, and arranging for authentication to fail
7634 instead of killing the process with assert().
7636 75. The SPA client code was not working when the server requested OEM rather
7637 than Unicode encoding.
7639 76. Added code to make require_files with a specific uid setting more usable in
7640 the case where statting the file as root fails - usually a non-root-mounted
7641 NFS file system. When this happens and the failure is EACCES, Exim now
7642 forks a subprocess and does the per-uid checking as the relevant uid.
7644 77. Added process_log_path.
7646 78. If log_file_path was not explicitly set, a setting of check_log_space or
7647 check_log_inodes was ignored.
7649 79. If a space check for the spool or log partitions fails, the incident is now
7650 logged. Of course, in the latter case the data may get lost...
7652 80. Added the %p formatting code to string_format() so that it can be used to
7653 print addresses in debug_print(). Adjusted all the address printing in the
7654 debugging in store.c to use %p rather than %d.
7656 81. There was a concern that a line of code in smtp_in.c could overflow a
7657 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7658 initially expressed, the concern was not well-founded, because trailing
7659 spaces are removed early. However, if the trailing spaces were followed by
7660 a NULL, they did not get removed, so the overflow was possible. Two fixes
7663 (a) I re-wrote the offending code in a cleaner fashion.
7664 (b) If an incoming SMTP command contains a NULL character, it is rejected
7667 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7668 runs initgroups(), so that if the Exim user is in any additional groups,
7669 they will be used during message reception.
7675 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob