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)
96 Previously this was permitted.
98 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
99 adjusted the size of a major service buffer; this failed because the
100 buffer was in use at the time. Change to a compile-time increase in the
101 buffer size, when this authenticator is compiled into exim.
103 JH/22 Taint checking: move to a hybrid approach for checking. Previously, one
104 of two ways was used, depending on a build-time flag. The fast method
105 relied on assumptions about the OS and libc malloc, which were known to
106 not hold for the BSD-derived platforms, and discovered to not hold for
107 32-bit Linux either. In fact the glibc documentation describes cases
108 where these assumptions do not hold. The new implementation tests for
109 the situation arising and actively switches over from fast to safe mode.
111 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
112 New values supported, if defined on system where compiled:
113 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
114 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
120 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
121 side, to decode a TLS 1.3 packet capture.
123 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
124 Previously the default library behaviour applied, sending two, each in
127 JH/03 Debug output for ACL now gives the config file name and line number for
130 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
132 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
134 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
135 buffer overrun for (non-chunking) other transports.
137 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
138 TLS1.3, means that a server rejecting a client certificate is not visible
139 to the client until the first read of encrypted data (typically the
140 response to EHLO). Add detection for that case and treat it as a failed
141 TLS connection attempt, so that the normal retry-in-clear can work (if
142 suitably configured).
144 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
145 and/or domain. Found and fixed by Jason Betts.
147 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
148 configuration). If a CNAME target was not a wellformed name pattern, a
151 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
152 the OS reports them interleaved with other addresses.
154 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
155 used both for input and for a verify callout, both encrypted, SMTP
156 responses being sent by the server could be lost. This resulted in
157 dropped connections and sometimes bounces generated by a peer sending
160 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
161 string. Previously it was possible to cause undefined behaviour in a
162 library routine (usually a crash). Found by "zerons".
164 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
167 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
168 API was removed, so update to use the newer ones.
170 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
171 any timeout set, is taking a long time. Previously we would hang on to a
172 rotated logfile "forever" if the input was arriving with long gaps
173 (a previous attempt to fix addressed lack, for a long time, of initial
176 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
177 shared (NFS) environment. The length of the tempfile name is now
178 4 + 16 ("hdr.$message_exim_id") which might break on file
179 systems which restrict the file name length to lower values.
182 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
183 shared (NFS) environment.
185 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
186 did for all versions <4.90). Notably -M, -m, --invert, -I may be
189 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
190 on some platforms for bit 31.
192 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
193 to changes apparently associated with TLS1.3 handling some of the APIs
194 previously used were either nonfunctional or inappropriate. Strings
195 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
196 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
197 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
198 This affects log line X= elements, the $tls_{in,out}_cipher variables,
199 and the use of specific cipher names in the encrypted= ACL condition.
201 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
203 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
204 verification result was not updated unless hosts_require_ocsp applied.
206 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
207 queue_list_requires_admin set to false, non-admin users were denied the
210 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
211 directory-of-certs mode. Previously they were advertised despite the
214 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
215 A single TCP connection by a client will now hold a TLS connection open
216 for multiple message deliveries, by default. Previoud the default was to
219 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
220 default. If built with the facility, DANE will be used. The facility
221 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
223 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
224 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
225 must be defined and you must still, unless you define DISABLE_TLS, manage
226 the the include-dir and library-file requirements that go with that
227 choice. Non-TLS builds are still supported.
229 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
232 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
233 default. If the platform supports and has the facility enabled, it will
234 be requested on all coneections.
236 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
237 controlled by the build-time option SUPPORT_PIPE_CONNECT.
239 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
241 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
242 success-DSN messages. Previously the From: header was always the default
243 one for these; the option was ignored.
245 JH/28 Fix the timeout on smtp response to apply to the whole response.
246 Previously it was reset for every read, so a teergrubing peer sending
247 single bytes within the time limit could extend the connection for a
248 long time. Credit to Qualsys Security Advisory Team for the discovery.
250 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
251 delivery address, which leaked information of the results of local
252 forwarding. Change to the original envelope recipient address, per
255 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
256 requested. Previously not bounce was generated and a log entry of
257 error ignored was made.
259 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
261 JH/32 Introduce a general tainting mechanism for values read from the input
262 channel, and values derived from them. Refuse to expand any tainted
263 values, to catch one form of exploit.
265 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
266 was unused and the unexpanded text used for the test. Found and
267 fixed by Ruben Jenster.
269 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
270 an attempt to use a TLS library read routine dereffed a nul pointer,
273 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
274 them in our smtp response.
276 JH/36 Have the general router option retry_use_local_part default to true when
277 any of the restrictive preconditions are set (to anything). Previously it
278 was only for check_local user. The change removes one item of manual
279 configuration which is required for proper retries when a remote router
280 handles a subset of addresses for a domain.
282 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
283 link count into consideration.
285 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
286 caused the extension of big_buffer, the following lines were ignored.
288 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
289 accordance with RFC 2308. Previously there was no expiry, so a longlived
290 receive process (eg. due to ACL delays) versus a short SOA value could
293 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
295 JH/39 Promote DMARC support to mainline.
297 JH/40 Bug 2452: Add a References: header to DSNs.
299 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
300 parameters. The relevant library call is documented as "Deprecated: This
301 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
302 3.6.0, DH parameters are negotiated following RFC7919."
304 HS/06 Change the default of dnssec_request_domains to "*"
306 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
307 carried on and emitted a BDAT command, even when PIPELINING was not
310 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
311 buffer was used for the filename, resulting in a trap when tainted
312 arguments (eg. $domain) were used.
314 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
315 recommended to avoid a possible server-load attack. The feature can be
316 re-enabled via the openssl_options main cofiguration option.
318 JH/45 local_scan API: documented the current smtp_printf() call. This changed
319 for version 4.90 - adding a "more data" boolean to the arguments.
320 Bumped the ABI version number also, this having been missed previously;
321 release versions 4.90 to 4.92.3 inclusive were effectively broken in
322 respect of usage of smtp_printf() by either local_scan code or libraries
323 accessed via the ${dlfunc } expansion item. Both will need coding
324 adjustment for any calls to smtp_printf() to match the new function
325 signature; a FALSE value for the new argument is always safe.
327 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
328 the file-offset (which the Linux syscall does, and exim expects); this
329 resulted in an indefinite loop.
331 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
332 to do ARC verification. The Authentication-Results: header line added
333 by the configuration then had no ARC item.
339 JH/01 Remove code calling the customisable local_scan function, unless a new
340 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
342 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
343 non-signal-safe functions being used.
345 JH/03 Bug 2269: When presented with a received message having a stupidly large
346 number of DKIM-Signature headers, disable DKIM verification to avoid
347 a resource-consumption attack. The limit is set at twenty.
349 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
350 report of oldest_pass in ${authres } in consequence, and separate out
351 some descriptions of reasons for verification fail.
353 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
354 files in the spool were present and unlocked. A queue-runner could spot
355 them, resulting in a duplicate delivery. Fix that by doing the unlock
356 after the unlink. Investigation by Tim Stewart. Take the opportunity to
357 add more error-checking on spoolfile handling while that code is being
360 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
361 No known attacks, no CVE, this is defensive hardening.
363 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
364 a queue-runner could start a delivery while other operations were ongoing.
365 Cutthrough delivery was a common victim, resulting in duplicate delivery.
366 Found and investigated by Tim Stewart. Fix by using the open message data
367 file handle rather than opening another, and not locally closing it (which
368 releases a lock) for that case, while creating the temporary .eml format
369 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
371 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
372 $sender_verify_failure/$recipient_verify_failure to "random".
374 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
377 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
378 Previously this would segfault.
380 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
383 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
384 like zero, since the resolver should be doing this for us, But we need one
385 as a CNAME but no MX presence gets the CNAME returned; we need to check
386 that doesn't point to an MX to declare it "no MX returned" rather than
387 "error, loop". A new main option is added so the older capability of
388 following some limited number of chain links is maintained.
390 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
392 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
393 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
394 now-deprecated earlier definitions used only specified the range up to TLS
395 1.2 (in the older-version library docs).
397 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
399 JH/15 Rework TLS client-side context management. Stop using a global, and
400 explicitly pass a context around. This enables future use of TLS for
401 connections to service-daemons (eg. malware scanning) while a client smtp
402 connection is using TLS; with cutthrough connections this is quite likely.
404 JH/16 Fix ARC verification to do AS checks in reverse order.
406 JH/17 Support a "tls" option on the ${readsocket } expansion item.
408 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
409 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
410 Previously the "utf8" would be re-prepended for every additional message.
412 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
413 Previously thery were accepted, resulting in issues when attempting to
414 forward messages to a non-supporting MTA.
416 PP/02 Let -n work with printing macros too, not just options.
418 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
419 one parent address was copied, and bogus data was used at delivery-logging
420 time. Either a crash (after delivery) or bogus log data could result.
421 Discovery and analysis by Tim Stewart.
423 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
424 Previously if the string ended mid-character, we did not insert the
425 promised '?' replacement.
427 PP/04 Documentation: current string operators work on bytes, not codepoints.
429 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
430 should pack well giving a smaller memory footprint so better caching and
431 therefore performance. Group the declarations where this can't be done so
432 that the byte-sized flag variables are not interspersed among pointer
433 variables, giving a better chance of good packing by the compiler.
435 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
436 non-null, to avoid issues with sites running BATV. Previously reports were
437 sent with an empty envelope sender so looked like bounces.
439 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
440 The ignore_error flag wasn't being returned from the filter subprocess so
441 was not set for later routers. Investigation and fix by Matthias Kurz.
443 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
444 and a msg:complete for the whole, when a message is manually removed using
445 -Mrm. Developement by Matthias Kurz, hacked on by JH.
447 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
448 a "Gnu special" function, asprintf() in the DB utility binary builds; I
449 hope that is portable enough.
451 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
452 requiring a known-CA anchor certificate; make it now rely entirely on the
453 TLSA as an anchor. Checking the name on the leaf cert against the name
454 on the A-record for the host is still done for TA (but not for EE mode).
456 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
457 included in delivery lines for non-proxied connections, when compiled with
458 SUPPORT_SOCKS and running with proxy logging enabled.
460 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
461 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
462 move the existing event to fire before the normal logging of message
463 failure so that custom logging is bracketed by normal logging.
465 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
466 msg:fail:internal event. Developement by Matthias Kurz.
468 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
469 far too small for todays use of crypto signatures stored there. Go all
470 the way to the max DNS message size of 64kB, even though this might be
471 overmuch for IOT constrained device use.
473 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
474 copy a string over itself. The library routine is documented as not
475 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
477 JH/32 For main options check_spool_space and check_inode_space, where the
478 platform supports 64b integers, support more than the previous 2^31 kB
479 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
480 the previous G, M, k.
482 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
483 $authenticated_fail_id variable on authentication failure. Previously
486 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
487 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
488 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
489 GNUTLS_SEC_PARAM_MEDIUM.
491 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
492 side. Previously we would continue as if no SNI had been received.
494 JH/36 Harden the handling of string-lists. When a list consisted of a sole
495 "<" character, which should be a list-separator specification, we walked
496 off past the nul-terimation.
498 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
499 causes) even when the retry time is not yet met. Previously they were
500 not, meaning that when (say) an account was over-quota and temp-rejecting,
501 and multiple senders' messages were queued, only one sender would get
502 notified on each configured delay_warning cycle.
504 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
506 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
507 cipher-suites, an error can be left on the stack even for a succeeding
508 accept; this results in impossible error messages when a later operation
511 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
512 return error codes indicating retry. Under TLS1.3 this becomes required.
514 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
515 it only wrote the new authenticators, resulting in a lack of tracking of
516 peer changes of ESMTP extensions until the next cache flush.
518 JH/41 Fix the loop reading a message header line to check for integer overflow,
519 and more-often against header_maxsize. Previously a crafted message could
520 induce a crash of the recive process; now the message is cleanly rejected.
522 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
523 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
529 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
530 When redis_servers is set to a list of > 1 element, and the Redis servers
531 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
532 case of MOVED into a DEFER case instead, thus moving the query onto the
533 next server in the list. For a cluster of N elements, all N servers must
534 be defined in redis_servers.
536 GF/02 Catch and remove uninitialized value warning in exiqsumm
537 Check for existence of @ARGV before looking at $ARGV[0]
539 JH/01 Replace the store_release() internal interface with store_newblock(),
540 which internalises the check required to safely use the old one, plus
541 the allocate and data copy operations duplicated in both (!) of the
542 extant use locations.
544 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
545 modifier. This matches the restriction on the commandline.
547 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
548 Previously only the last row was returned.
550 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
551 we assumed that tags in the header were well-formed, and parsed the
552 element content after inspecting only the first char of the tag.
553 Assumptions at that stage could crash the receive process on malformed
556 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
557 While running the DKIM ACL we operate on the Permanent memory pool so that
558 variables created with "set" persist to the DATA ACL. Also (at any time)
559 DNS lookups that fail create cache records using the Permanent pool. But
560 expansions release any allocations made on the current pool - so a dnsdb
561 lookup expansion done in the DKIM ACL releases the memory used for the
562 DNS negative-cache, and bad things result. Solution is to switch to the
563 Main pool for expansions.
564 While we're in that code, add checks on the DNS cache during store_reset,
565 active in the testsuite.
566 Problem spotted, and debugging aided, by Wolfgang Breyha.
568 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
569 When none of the hosts presented to a transport match an already-open
570 connection, close it and proceed with the list. Previously we would
571 queue the message. Spotted by Lena with Yahoo, probably involving
574 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
575 Previously a spurious "250 OK id=" response was appended to the proper
578 JH/08 The "support for" informational output now, which built with Content
579 Scanning support, has a line for the malware scanner interfaces compiled
580 in. Interface can be individually included or not at build time.
582 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
583 by the template makefile "src/EDITME". The "STREAM" support for an older
584 ClamAV interface method is removed.
586 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
587 rows affected is given instead).
589 JH/11 The runtime Berkeley DB library version is now additionally output by
590 "exim -d -bV". Previously only the compile-time version was shown.
592 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
593 SMTP connection. Previously, when one had more receipients than the
594 first, an abortive onward connection was made. Move to full support for
595 multiple onward connections in sequence, handling cutthrough connection
596 for all multi-message initiating connections.
598 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
599 routers. Previously, a multi-recipient message would fail to match the
600 onward-connection opened for the first recipient, and cause its closure.
602 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
603 a timeout on read on a GnuTLS initiating connection, resulting in the
604 initiating connection being dropped. This mattered most when the callout
605 was marked defer_ok. Fix to keep the two timeout-detection methods
608 JH/15 Relax results from ACL control request to enable cutthrough, in
609 unsupported situations, from error to silently (except under debug)
610 ignoring. This covers use with PRDR, frozen messages, queue-only and
613 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
615 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
616 metadata, resulting in a crash in free().
618 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
619 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
620 Broken also in d185889f4, with init system revamp.
622 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
623 Previously we abruptly closed the connection after reading a malware-
624 found indication; now we go on to read the "scan ok" response line,
627 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
628 ACL. Previously, a crash would result.
630 JH/19 Speed up macro lookups during configuration file read, by skipping non-
631 macro text after a replacement (previously it was only once per line) and
632 by skipping builtin macros when searching for an uppercase lead character.
634 JH/20 DANE support moved from Experimental to mainline. The Makefile control
635 for the build is renamed.
637 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
638 was allocated for every new TLS startup, meaning one per message. Fix
639 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
641 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
642 reported the original. Fix to report (as far as possible) the ACL
643 result replacing the original.
645 JH/23 Fix memory leak during multi-message connections using STARTTLS under
646 OpenSSL. Certificate information is loaded for every new TLS startup,
647 and the resources needed to be freed.
649 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
651 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
654 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
655 DATA response info to the (existing) per-recipient response info for
656 the "C=" log element. It can have useful tracking info from the
657 destination system. Patch from Simon Arlott.
659 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
660 length value. Previously this would segfault.
662 HS/02 Support Avast multiline protoocol, this allows passing flags to
663 newer versions of the scanner.
665 JH/28 Ensure that variables possibly set during message acceptance are marked
666 dead before release of memory in the daemon loop. This stops complaints
667 about them when the debug_store option is enabled. Discovered specifically
668 for sender_rate_period, but applies to a whole set of variables.
669 Do the same for the queue-runner and queue-list loops, for variables set
670 from spool message files. Do the same for the SMTP per-message loop, for
671 certain variables indirectly set in ACL operations.
673 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
674 as a multi-recipient message from a mailinglist manager). The coding had
675 an arbitrary cutoff number of characters while checking for more input;
676 enforced by writing a NUL into the buffer. This corrupted long / fast
677 input. The problem was exposed more widely when more pipelineing of SMTP
678 responses was introduced, and one Exim system was feeding another.
679 The symptom is log complaints of SMTP syntax error (NUL chars) on the
680 receiving system, and refused recipients seen by the sending system
681 (propating to people being dropped from mailing lists).
682 Discovered and pinpointed by David Carter.
684 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
685 replaced by the ${authresults } expansion.
687 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
689 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
690 allows proper process termination in container environments.
692 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
693 Previously the "final dot" had a newline after it; ensure it is CR,LF.
695 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
696 and "err_perm", deprecated since 4.83 when the RFC-defined words
697 "temperror" and "permerror" were introduced.
699 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
700 transport-filters or DKIM-signing. The restriction was lost in the
701 consolidation of verify-callout and delivery SMTP handling.
702 Extend the restriction to also cover ARC-signing.
704 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
705 in defer=pass mode supply a 450 to the initiator. Previously the message
708 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
709 tls_require_ciphers is used as before.
711 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
712 "pass_unscanned". Only tmpfails from the scanner are written to
713 the paniclog, as they may require admin intervention (permission
714 denied, license issues). Other scanner errors (like decompression
715 bombs) do not cause a paniclog entry.
717 JH/36 Fix reinitialisation of DKIM logging variable between messages.
718 Previously it was possible to log spurious information in receive log
721 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
722 triggered odd behaviour from Outlook Express clients.
724 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
727 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
728 since the IETF WG has not yet settled on that versus the original
729 "bare" representation.
731 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
732 Previously the millisecond value corrupted the output.
733 Fix also for syslog_pid=no and log_selector +pid, for which the pid
734 corrupted the output.
740 JH/01 Rework error string handling in TLS interface so that the caller in
741 more cases is responsible for logging. This permits library-sourced
742 string to be attached to addresses during delivery, and collapses
743 pairs of long lines into single ones.
745 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
746 during configuration. Wildcards are allowed and expanded.
748 JH/02 Rework error string handling in DKIM to pass more info back to callers.
749 This permits better logging.
751 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
752 do not close it down and have the child transport start it up again on
753 the passed-on TCP connection. Instead, proxy the child (and any
754 subsequent ones) for TLS via a unix-domain socket channel. Logging is
755 affected: the continued delivery log lines do not have any DNSSEC, TLS
756 Certificate or OCSP information. TLS cipher information is still logged.
758 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
759 identical IP addresses on different listening ports. Will also affect
762 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
763 add noisy ifdef guards to special-case this sillyness.
764 Patch from Bernd Kuhls.
766 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
767 than 255 are no longer allowed.
769 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
770 Disable the session-cache too, which might reduce our load. Since we
771 currrectly use a new context for every connection, both as server and
772 client, there is no benefit for these.
773 GnuTLS appears to not support tickets server-side by default (we don't
774 call gnutls_session_ticket_enable_server()) but client side is enabled
775 by default on recent versions (3.1.3 +) unless the PFS priority string
778 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
779 <https://reproducible-builds.org/specs/source-date-epoch/>.
781 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
782 the check for any unsuccessful recipients did not notice the limit, and
783 erroneously found still-pending ones.
785 JH/08 Pipeline CHUNKING command and data together, on kernels that support
786 MSG_MORE. Only in-clear (not on TLS connections).
788 JH/09 Avoid using a temporary file during transport using dkim. Unless a
789 transport-filter is involved we can buffer the headers in memory for
790 creating the signature, and read the spool data file once for the
791 signature and again for transmission.
793 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
794 4.77 as the kernel support then wasn't solid, having issues in 64bit
795 mode. Now, it's been long enough. Add support for FreeBSD also.
797 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
798 case where the routing stage had gathered several addresses to send to
799 a host before calling the transport for the first, we previously failed
800 to close down TLS in the old transport process before passing the TCP
801 connection to the new process. The new one sent a STARTTLS command
802 which naturally failed, giving a failed delivery and bloating the retry
803 database. Investigation and fix prototype from Wolfgang Breyha.
805 JH/12 Fix check on SMTP command input synchronisation. Previously there were
806 false-negatives in the check that the sender had not preempted a response
807 or prompt from Exim (running as a server), due to that code's lack of
808 awareness of the SMTP input buffering.
810 PP/04 Add commandline_checks_require_admin option.
811 Exim drops privileges sanely, various checks such as -be aren't a
812 security problem, as long as you trust local users with access to their
813 own account. When invoked by services which pass untrusted data to
814 Exim, this might be an issue. Set this option in main configuration
815 AND make fixes to the calling application, such as using `--` to stop
818 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
819 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
820 responses to those, into a single TLS record each way (this usually means
821 a single packet). As a side issue, smtp_enforce_sync now works on TLS
824 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
825 affects you only if you're dancing at the edge of the param size limits.
826 If you are, and this message makes sense to you, then: raise the
827 configured limit or use OpenSSL 1.1. Nothing we can do for older
830 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
831 cmdline element to get the documented default one. Previously it was
834 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
835 are unsuable for non-message-specific reasons - eg. connection timeout,
836 banner-time rejection.
838 JH/16 Fix logging of delivery remote port, when specified by router, under
841 PP/06 Repair manualroute's ability to take options in any order, even if one
842 is the name of a transport.
845 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
847 JH/17 Change the list-building routines interface to use the expanding-string
848 triplet model, for better allocation and copying behaviour.
850 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
851 Previously it was constructed the first time a possibly-matching string
852 was met in the configuration file input during startup; now it is done
855 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
856 compatible one, to avoid the (poorly documented) possibility of a config
857 file in the working directory redirecting the DB files, possibly correpting
858 some existing file. CVE-2017-10140 assigned for BDB.
860 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
861 cache-hot. Previously, although the result was properly cached, the
862 initial verify call returned a defer.
864 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
865 the main verify for receipient in uncached-mode.
867 JH/22 Retire historical build files to an "unsupported" subdir. These are
868 defined as "ones for which we have no current evidence of testing".
870 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
871 if present. Previously it was ignored.
873 JH/24 Start using specified-initialisers in C structure init coding. This is
874 a C99 feature (it's 2017, so now considered safe).
876 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
877 if was a fixed-sized field and bitmask ops via macros; it is now more
880 PP/07 GitHub PR 56: Apply MariaDB build fix.
881 Patch provided by Jaroslav Škarvada.
883 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
884 during Coverity cleanups [4.87 JH/47]
885 Diagnosis and fix provided by Michael Fischer v. Mollard.
887 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
888 the right size to place the terminating semicolon on its own folded
889 line, the header hash was calculated to an incorrect value thanks to
890 the (relaxed) space the fold became.
892 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
893 and confused the parent.
895 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
896 which could crash as a result. This could lead to undeliverable messages.
898 JH/28 Logging: "next input sent too soon" now shows where input was truncated
901 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
902 matters on fast-turnover and PID-randomising systems, which were getting
903 out-of-order delivery.
905 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
906 a possibly-overlapping copy. The symptom was that "Remote host closed
907 connection in response to HELO" was logged instead of the actual 4xx
910 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
911 Previously only that bufferd was discarded, resulting in SYMTP command
914 JH/32 DKIM: when a message has multiple signatures matching an identity given
915 in dkim_verify_signers, run the dkim acl once for each. Previously only
916 one run was done. Bug 2189.
918 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
919 "panic the current process" to "deliberately defer". The panic log is
920 still written with the problem list name; the mail and reject logs now
921 get a temp-reject line for the message that was being handled, saying
922 something like "domains check lookup or other defer". The SMTP 451
923 message is still "Temporary local problem".
925 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
926 A crafted sequence of BDAT commands could result in in-use memory beeing
927 freed. CVE-2017-16943.
929 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
930 from SMTP input. Previously it was always done; now only done for DATA
931 and not BDAT commands. CVE-2017-16944.
933 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
934 to the message (such as an overlong header line). Previously this was
935 not done and we did not exit BDAT mode. Followon from the previous item
936 though a different problem.
942 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
943 than -2003 did; needs libidn2 in addition to libidn.
945 JH/02 The path option on a pipe transport is now expanded before use.
947 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
948 Patch provided by "Björn", documentation fix added too.
950 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
951 missing a wire-to-host endian conversion.
953 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
954 close after a BDAT command line could be taken as a following command,
955 giving a synch failure. Fix by only checking for synch immediately
956 before acknowledging the chunk.
958 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
959 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
960 macro. Patches provided by Josh Soref.
962 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
963 Previously we did not; the RFC seems ambiguous and VRFY is not listed
964 by IANA as a service extension. However, John Klensin suggests that we
967 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
968 the dkim code may be unix-mode line endings rather than smtp wire-format
969 CRLF, so prepend a CR to any bare LF.
971 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
972 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
974 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
975 the first were themselves being wrongly included in the feed into dkim
976 processing; with most chunk sizes in use this resulted in an incorrect
977 body hash calculated value.
979 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
980 DKIM signature block, for verification. Although advised against by
981 standards it is specifically not ruled illegal.
983 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
985 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
986 missing a body hash (the bh= tag).
988 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
989 It seems that HAProxy sends the Proxy Protocol information in clear and
990 only then does a TLS startup, so do the same.
992 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
993 TCP connections (such as for Spamd) unless the daemon successfully set
994 Fast Open mode on its listening sockets. This fixes breakage seen on
995 too-old kernels or those not configured for Fast Open, at the cost of
996 requiring both directions being enabled for TFO, and TFO never being used
997 by non-daemon-related Exim processes.
999 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1000 endings, at least on the first header line. Try to canonify any that get
1001 past that check, despite the cost.
1003 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1004 now limited to an arbitrary five deep, while parsing addresses with the
1005 strip_excess_angle_brackets option enabled.
1007 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1008 instead leave the unprompted TLS handshake in socket buffer for the
1009 TLS library to consume.
1011 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1013 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1015 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1016 region in one operation, for speed, and this leaves assigned pointers
1017 dangling. Add checks run only under the testsuite which checks all
1018 variables at a store-reset and panics on a dangling pointer; add code
1019 explicitly nulling out all the variables discovered. Fixes one known
1020 bug: a transport crash, where a dangling pointer for $sending_ip_address
1021 originally assigned in a verify callout, is re-used.
1023 PP/06 Drop '.' from @INC in various Perl scripts.
1025 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1027 PP/08 Reduce a number of compilation warnings under clang; building with
1028 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1029 should be warning-free.
1031 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1033 HS/01 Fix portability problems introduced by PP/08 for platforms where
1034 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1036 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1037 chunk. This allows us to accept broken chunked messages. We need a more
1038 general solution here.
1040 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1041 already-broken messages in the queue.
1043 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1045 JH/19 Fix reference counting bug in routing-generated-address tracking.
1051 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1052 supports it and a size is available (ie. the sending peer gave us one).
1054 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1055 years of being deprecated). The replacements are the ACLs
1056 acl_smtp_mime and acl_not_smtp_mime.
1058 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1059 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1060 or even an in-clear connection were permitted. Now, if the host lookup
1061 was dnssec and dane was requested then the host is only used if the
1062 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1063 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1064 if one fails this test.
1065 This means that a poorly-configured remote DNS will make it incommunicado;
1066 but it protects against a DNS-interception attack on it.
1068 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1069 non-noisy when a race steals the message being considered.
1071 JH/05 If main configuration option tls_certificate is unset, generate a
1072 self-signed certificate for inbound TLS connections.
1074 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1075 in rewrites and routers.
1077 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1078 and logged a warning sing 4.83; now they are a configuration file error.
1080 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1081 (lacking @domain). Apply the same qualification processing as RCPT.
1083 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1085 JH/10 Support ${sha256:} applied to a string (as well as the previous
1088 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1089 a cutthrough deliver is pending, as we always want to make a connection.
1090 This also avoids re-routing the message when later placing the cutthrough
1091 connection after a verify cache hit.
1092 Do not update it with the verify result either.
1094 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1095 when routing results in more than one destination address.
1097 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1098 signing (which inhibits the cutthrough capability). Previously only
1099 the presence of an option was tested; now an expansion evaluating as
1100 empty is permissible (obviously it should depend only on data available
1101 when the cutthrough connection is made).
1103 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1104 the relevant preceding SMTP command did not note the pipelining mode.
1106 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1107 Previously they were not counted.
1109 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1110 as one having no matching records. Previously we deferred the message
1111 that needed the lookup.
1113 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1114 distinguished as "(=".
1116 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1117 for missing MX records. Previously it only worked for missing A records.
1119 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1121 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1122 after the data-go-ahead and data-ack. Patch from Jason Betts.
1124 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1125 even for a "none" policy. Patch from Tony Meyer.
1127 JH/22 Fix continued use of a connection for further deliveries. If a port was
1128 specified by a router, it must also match for the delivery to be
1131 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1132 When one of the recipients of a message was unsuitable for the connection
1133 (has no matching addresses), we lost track of needing to mark it
1134 deferred. As a result mail would be lost.
1136 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1138 JH/25 Decoding ACL controls is now done using a binary search; the source code
1139 takes up less space and should be simpler to maintain. Merge the ACL
1140 condition decode tables also, with similar effect.
1142 JH/26 Fix problem with one_time used on a redirect router which returned the
1143 parent address unchanged. A retry would see the parent address marked as
1144 delivered, so not attempt the (identical) child. As a result mail would
1147 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1148 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1149 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1152 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1153 Main config options check_{log,spool}_{inodes,space} are now
1154 100 inodes, 10MB unless set otherwise in the configuration.
1156 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1157 Previously it only applied to the main-section connection policy
1160 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1162 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1163 by me. Added RFC7919 DH primes as an alternative.
1165 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1166 are not in the system include path.
1168 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1169 GnuTLS, when a session startup failed (eg because the client disconnected)
1170 Exim did stdio operations after fclose. This was exposed by a recent
1171 change which nulled out the file handle after the fclose.
1173 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1174 signed directly by the cert-signing cert, rather than an intermediate
1175 OCSP-signing cert. This is the model used by LetsEncrypt.
1177 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1179 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1180 an incoming connection.
1182 HS/02 Bug 1802: Do not half-close the connection after sending a request
1185 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1186 fallback to "prime256v1".
1188 JH/34 SECURITY: Use proper copy of DATA command in error message.
1189 Could leak key material. Remotely exploitable. CVE-2016-9963.
1195 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1196 and 3.4.4 - once the server is enabled to respond to an OCSP request
1197 it does even when not requested, resulting in a stapling non-aware
1198 client dropping the TLS connection.
1200 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1201 support variable-length bit vectors. No functional change.
1203 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1204 The I= interface field on outgoing lines is now after the H= remote
1205 host field, same as incoming lines. There is a separate
1206 outgoing_interface log selector which allows you to disable the
1209 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1210 If not running log_selector +smtp_connection the mainlog would be held
1211 open indefinitely after a "too many connections" event, including to a
1212 deleted file after a log rotate. Leave the per net connection logging
1213 leaving it open for efficiency as that will be quickly detected by the
1214 check on the next write.
1216 HS/01 Bug 1671: Fix post transport crash.
1217 Processing the wait-<transport> messages could crash the delivery
1218 process if the message IDs didn't exist for some reason. When
1219 using 'split_spool_directory=yes' the construction of the spool
1220 file name failed already, exposing the same netto behaviour.
1222 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1223 mime_regex ACL conditions.
1225 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1226 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1227 to HELO, local diagnostic string.
1229 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1230 log line to debug. Even when configured with a tls authenticator many
1231 client connections are expected to not authenticate in this way, so
1232 an authenticate fail is not an error.
1234 HS/02 Add the Exim version string to the process info. This way exiwhat
1235 gives some more detail about the running daemon.
1237 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1238 matter for fast-change records such as DNSBLs.
1240 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1241 retry record, even if constant. There may be multiple transports with
1242 different interface settings and the retry behaviour needs to be kept
1245 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1247 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1249 JH/10 Bug 840: fix log_defer_output option of pipe transport
1251 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1252 hosts_randomize. This matters a lot when combined with mua_wrapper.
1254 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1255 ${quote_pgsql:<string>} operator.
1257 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1259 JH/14 Change header file name for freeradius-client. Relevant if compiling
1260 with Radius support; from the Gentoo tree and checked under Fedora.
1262 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1264 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1265 option transport_filter, meaning no filtering.
1267 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1269 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1270 defaults to "*" (all hosts). The variable is now available when not built
1271 with TLS, default unset, mainly to enable keeping the testsuite sane.
1272 If a server certificate is not supplied (via tls_certificate) an error is
1273 logged, and clients will find TLS connections fail on startup. Presumably
1274 they will retry in-clear.
1275 Packagers of Exim are strongly encouraged to create a server certificate
1276 at installation time.
1278 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1279 with the $config_file variable.
1281 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1282 in transport context, after the attempt, and per-recipient. The latter type
1283 is per host attempted. The event data is the error message, and the errno
1284 information encodes the lookup type (A vs. MX) used for the (first) host,
1285 and the trailing two digits of the smtp 4xx response.
1287 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1288 to write to mainlog (or rejectlog, paniclog) in the window between file
1289 creation and permissions/ownership being changed. Particularly affects
1290 installations where exicyclog is run as root, rather than exim user;
1291 result is that the running daemon panics and dies.
1293 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1295 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1296 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1297 "pri" and "weight". Note that the previous implicit priority given by the
1298 list order is no longer honoured.
1300 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1301 for DKIM processing.
1303 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1304 by defining SUPPORT_SOCKS.
1306 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1307 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1308 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1309 variables are renamed to proxy_{local,external}_{address,port}.
1311 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1312 for a build by defining SUPPORT_I18N
1314 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1315 of the query string, and make ${quote_redis:} do that quoting.
1317 JH/29 Move Events support from Experimental to mainline, enabled by default
1318 and removable for a build by defining DISABLE_EVENT.
1320 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1322 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1323 cached by the daemon.
1325 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1326 by defining LOOKUP_REDIS. The libhiredis library is required.
1328 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1329 keys are given for lookup.
1331 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1332 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1333 only supported when built with TLS support. The PolarSSL SHA routines
1334 are still used when the TLS library is too old for convenient support.
1336 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1337 openssl_options), for security. OpenSSL forces this from version 1.1.0
1338 server-side so match that on older versions.
1340 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1341 allocation for $value could be released as the expansion processing
1342 concluded, but leaving the global pointer active for it.
1344 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1345 and to use the domains and local_parts ACL conditions.
1347 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1348 incorrectly not doubled on cutthrough transmission, hence seen as a
1349 body-termination at the receiving system - resulting in truncated mails.
1350 Commonly the sender saw a TCP-level error, and retransmitted the message
1351 via the normal store-and-forward channel. This could result in duplicates
1352 received - but deduplicating mailstores were liable to retain only the
1353 initial truncated version.
1355 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1357 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1359 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1360 we're in there, support oversigning also; bug 1309.
1362 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1364 HS/04 Add support for keep_environment and add_environment options.
1366 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1367 either intentional arithmetic overflow during PRNG, or testing config-
1370 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1371 delivery resulted in actual delivery. Cancel cutthrough before DATA
1374 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1375 rejects a recipient: pass the reject to the originator.
1377 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1378 Many were false-positives and ignorable, but it's worth fixing the
1381 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1382 for the new environment-manipulation done at startup. Move the routines
1383 from being local to tls.c to being global via the os.c file.
1385 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1386 an extract embedded as result-arg for a map, the first arg for extract
1387 is unavailable so we cannot tell if this is a numbered or keyed
1388 extraction. Accept either.
1394 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1397 JH/02 The smtp transport option "multi_domain" is now expanded.
1399 JH/03 The smtp transport now requests PRDR by default, if the server offers
1402 JH/04 Certificate name checking on server certificates, when exim is a client,
1403 is now done by default. The transport option tls_verify_cert_hostnames
1404 can be used to disable this per-host. The build option
1405 EXPERIMENTAL_CERTNAMES is withdrawn.
1407 JH/05 The value of the tls_verify_certificates smtp transport and main options
1408 default to the word "system" to access the system default CA bundle.
1409 For GnuTLS, only version 3.0.20 or later.
1411 JH/06 Verification of the server certificate for a TLS connection is now tried
1412 (but not required) by default. The verification status is now logged by
1413 default, for both outbound TLS and client-certificate supplying inbound
1416 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1419 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1420 Status Notification (bounce) messages are now MIME format per RFC 3464.
1421 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1422 under the control of the dsn_advertise_hosts option, and routers may
1423 have a dsn_lasthop option.
1425 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1426 default, modifiable by a malware= option. The list separator for
1427 the options can now be changed in the usual way. Bug 68.
1429 JH/10 The smtp_receive_timeout main option is now expanded before use.
1431 JH/11 The incoming_interface log option now also enables logging of the
1432 local interface on delivery outgoing connections.
1434 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1435 if the interface and destination host and port all match.
1437 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1440 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1441 Patch from Andrew Lewis.
1443 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1444 now supports optional time-restrictions, weighting, and priority
1445 modifiers per server. Patch originally by <rommer@active.by>.
1447 JH/16 The spamd_address main option now supports a mixed list of local
1448 and remote servers. Remote servers can be IPv6 addresses, and
1449 specify a port-range.
1451 JH/17 Bug 68: The spamd_address main option now supports an optional
1452 timeout value per server.
1454 JH/18 Bug 1581: Router and transport options headers_add/remove can
1455 now have the list separator specified.
1457 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1460 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1463 JH/21 Support for the A6 type of dns record is withdrawn.
1465 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1466 rather than the verbs used.
1468 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1469 from 255 to 1024 chars.
1471 JH/24 Verification callouts now attempt to use TLS by default.
1473 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1474 are generic router options now. The defaults didn't change.
1476 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1477 Original patch from Alexander Shikoff, worked over by JH.
1479 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1480 files if ZCAT_COMMAND is not executable.
1482 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1484 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1486 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1487 Normally benign, it bites when the pair was led to by a CNAME;
1488 modern usage is to not canonicalize the domain to a CNAME target
1489 (and we were inconsistent anyway for A-only vs AAAA+A).
1491 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1493 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1494 when evaluating $sender_host_dnssec.
1496 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1497 $sender_helo_dnssec variable.
1499 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1501 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1503 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1505 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1506 documented as working, but never had. Support all but $spam_report.
1508 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1509 added for tls authenticator.
1511 HS/03 Add perl_taintmode main config option
1517 TL/01 When running the test suite, the README says that variables such as
1518 no_msglog_check are global and can be placed anywhere in a specific
1519 test's script, however it was observed that placement needed to be near
1520 the beginning for it to behave that way. Changed the runtest perl
1521 script to read through the entire script once to detect and set these
1522 variables, reset to the beginning of the script, and then run through
1523 the script parsing/test process like normal.
1525 TL/02 The BSD's have an arc4random API. One of the functions to induce
1526 adding randomness was arc4random_stir(), but it has been removed in
1527 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1528 function when detected.
1530 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1531 cause callback expansion.
1533 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1534 syntax errors in an expansion can be treated as a string instead of
1535 logging or causing an error, due to the internal use of bool_lax
1536 instead of bool when processing it.
1538 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1539 server certificates when making smtp deliveries.
1541 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1543 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1545 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1547 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1548 Merged patch from Sebastian Wiedenroth.
1550 JH/05 Fix results-pipe from transport process. Several recipients, combined
1551 with certificate use, exposed issues where response data items split
1552 over buffer boundaries were not parsed properly. This eventually
1553 resulted in duplicates being sent. This issue only became common enough
1554 to notice due to the introduction of connection certificate information,
1555 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1557 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1558 size buffer was used, resulting in syntax errors when an expansion
1561 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1562 version 3.3.6 or later.
1564 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1565 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1566 both become "event_action", the variables become $event_name, $event_data
1567 and $event_defer_errno. There is a new variable $verify_mode, usable in
1568 routers, transports and related events. The tls:cert event is now also
1569 raised for inbound connections, if the main configuration event_action
1572 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1573 early OCSP support, but no stapling (appears to be less than 1.0.0).
1575 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1576 server certificate names available under the smtp transport option
1577 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1580 JH/10 Time-related extraction expansions from certificates now use the main
1581 option "timezone" setting for output formatting, and are consistent
1582 between OpenSSL and GnuTLS compilations. Bug 1541.
1584 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1585 encoded parameter in the incoming message. Bug 1558.
1587 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1588 include certificate info, eximon was claiming there were spoolfile
1591 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1593 JH/14 Log delivery-related information more consistently, using the sequence
1594 "H=<name> [<ip>]" wherever possible.
1596 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1597 are problematic for Debian distribution, omit them from the release
1600 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1602 JH/16 Fix string representation of time values on 64bit time_t architectures.
1605 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1606 output list separator was used.
1611 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1612 checkers that were complaining about end of non-void function with no
1615 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1616 This was a regression introduced in 4.83 by another bugfix.
1618 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1620 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1621 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1627 TF/01 Correctly close the server side of TLS when forking for delivery.
1629 When a message was received over SMTP with TLS, Exim failed to clear up
1630 the incoming connection properly after forking off the child process to
1631 deliver the message. In some situations the subsequent outgoing
1632 delivery connection happened to have the same fd number as the incoming
1633 connection previously had. Exim would try to use TLS and fail, logging
1634 a "Bad file descriptor" error.
1636 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1637 utilities have not been installed.
1639 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1640 temporary space as the ACL may create new global variables.
1642 TL/01 LDAP support uses per connection or global context settings, depending
1643 upon the detected version of the libraries at build time.
1645 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1646 to extract and use the src ip:port in logging and expansions as if it
1647 were a direct connection from the outside internet. PPv2 support was
1648 updated based on HAProxy spec change in May 2014.
1650 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1652 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1653 Properly escape header and check for NULL return.
1655 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1658 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1660 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1661 characters in header names, implemented as a verify condition.
1662 Contributed by Michael Fischer v. Mollard.
1664 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1665 results permerror and temperror. Previous values are deprecated but
1666 still accepted. In a future release, err_perm and err_temp will be
1667 completely removed, which will be a backward incompatibility if the
1668 ACL tests for either of these two old results. Patch contributed by
1669 user bes-internal on the mailing list.
1671 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1673 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1674 selectors, in both main and reject logs.
1676 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1679 JH/07 Add malware type "sock" for talking to simple daemon.
1681 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1683 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1684 routers/transports under cutthrough routing.
1686 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1687 numbers. Touch up "bool" conditional to keep the same definition.
1689 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1691 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1693 JH/12 Expand items in router/transport headers_add or headers_remove lists
1694 individually rather than the list as a whole. Bug 1452.
1696 Required for reasonable handling of multiple headers_ options when
1697 they may be empty; requires that headers_remove items with embedded
1698 colons must have them doubled (or the list-separator changed).
1700 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1701 view the policy declared in the DMARC record. Currently, $dmarc_status
1702 is a combined value of both the record presence and the result of the
1705 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1707 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1708 dnslookup router and the smtp transport (applying to the forward
1711 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1712 of ldap servers used for a specific lookup. Patch provided by Heiko
1715 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1716 New variable $lookup_dnssec_authenticated for observability.
1718 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1719 Patch submitted by Lars Timman.
1721 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1723 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1724 Requires trusted mode and valid format message id, aborts otherwise.
1725 Patch contributed by Heiko Schlichting.
1727 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1728 certextract with support for various fields. Bug 1358.
1730 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1731 is requested by default, modifiable by smtp transport option
1734 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1735 operate on certificate variables to give certificate fingerprints
1736 Also new ${sha256:cert_variable}.
1738 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1740 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1741 Christian Aistleitner.
1743 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1745 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1746 file. Patch from Wolfgang Breyha.
1748 JH/25 Expand the coverage of the delivery $host and $host_address to
1749 client authenticators run in verify callout. Bug 1476.
1751 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1752 align with daemon_smtp_ports. Bug 72.
1754 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1755 support and error reporting did not work properly.
1757 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1758 and is readable. Patch from Andrew Colin Kissa.
1760 TL/14 Enhance documentation of ${run expansion and how it parses the
1761 commandline after expansion, particularly in the case when an
1762 unquoted variable expansion results in an empty value.
1764 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1766 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1767 by renaming away from it. Addresses GH issue 15, reported by
1770 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1772 TL/15 SECURITY: prevent double expansion in math comparison functions
1773 (can expand unsanitized data). Not remotely exploitable.
1780 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1782 PP/02 Make -n do something, by making it not do something.
1783 When combined with -bP, the name of an option is not output.
1785 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1788 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1789 $sender_host_name and config options to manage this, and basic check
1792 PP/05 DSCP support for outbound connections and control modifier for inbound.
1794 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1795 (Only plugin which currently uses this is kerberos4, which nobody should
1796 be using, but we should make it available and other future plugins might
1797 conceivably use it, even though it would break NAT; stuff *should* be
1798 using channel bindings instead).
1800 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1801 name; added for Sendmail compatibility; requires admin caller.
1802 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1803 just ignore it); requires trusted caller.
1804 Also parse but ignore: -Ac -Am -X<logfile>
1807 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1809 TL/02 Add +smtp_confirmation as a default logging option.
1811 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1812 Patch by Magnus Holmgren from 2007-02-20.
1814 TL/04 Bugzilla 1281 - Spec typo.
1815 Bugzilla 1283 - Spec typo.
1816 Bugzilla 1290 - Spec grammar fixes.
1818 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1820 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1822 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1823 mailing list by by Dmitry Isaikin.
1825 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1827 JH/02 Support "G" suffix to numbers in ${if comparisons.
1829 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1831 NM/01 Bugzilla 1197 - Spec typo
1832 Bugzilla 1196 - Spec examples corrections
1834 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1836 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1837 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1840 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1841 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1843 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1844 "acl {{name}{arg}...}", and optional args on acl condition
1847 JH/05 Permit multiple router/transport headers_add/remove lines.
1849 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1851 JH/07 Avoid using a waiting database for a single-message-only transport.
1852 Performance patch from Paul Fisher. Bugzilla 1262.
1854 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1857 JH/09 Add $headers_added variable, with content from use of ACL modifier
1858 add_header (but not yet added to the message). Bugzilla 199.
1860 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1861 Pulled from Bugzilla 817 by Wolfgang Breyha.
1863 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1865 (nb: this is the same fix as in Exim 4.80.1)
1867 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1870 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1873 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1875 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1876 advertise SMTP AUTH mechanism to us, instead of a generic
1877 protocol violation error. Also, make Exim more robust to bad
1878 data from the Dovecot auth socket.
1880 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1882 When a queue runner is handling a message, Exim first routes the
1883 recipient addresses, during which it prunes them based on the retry
1884 hints database. After that it attempts to deliver the message to
1885 any remaining recipients. It then updates the hints database using
1888 So if a recipient address works intermittently, it can get repeatedly
1889 deferred at routing time. The retry hints record remains fresh so the
1890 address never reaches the final cutoff time.
1892 This is a fairly common occurrence when a user is bumping up against
1893 their storage quota. Exim had some logic in its local delivery code
1894 to deal with this. However it did not apply to per-recipient defers
1895 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1897 This change adds a proper retry rule check during routing so that the
1898 final cutoff time is checked against the message's age. We only do
1899 this check if there is an address retry record and there is not a
1900 domain retry record; this implies that previous attempts to handle
1901 the address had the retry_use_local_parts option turned on. We use
1902 this as an approximation for the destination being like a local
1903 delivery, as in LMTP.
1905 I suspect this new check makes the old local delivery cutoff check
1906 redundant, but I have not verified this so I left the code in place.
1908 TF/02 Correct gecos expansion when From: is a prefix of the username.
1910 Test 0254 submits a message to Exim with the header
1914 When I ran the test suite under the user fanf2, Exim expanded
1915 the header to contain my full name, whereas it should have added
1916 a Resent-Sender: header. It erroneously treats any prefix of the
1917 username as equal to the username.
1919 This change corrects that bug.
1921 GF/01 DCC debug and logging tidyup
1922 Error conditions log to paniclog rather than rejectlog.
1923 Debug lines prefixed by "DCC: " to remove any ambiguity.
1925 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1927 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1928 Bug spotted by Jeremy Harris; was flawed since initial commit.
1929 Would have resulted in OCSP responses post-SNI triggering an Exim
1930 NULL dereference and crash.
1932 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1934 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1935 Bug detection, analysis and fix by Samuel Thibault.
1936 Bugzilla 1331, Debian bug #698092.
1938 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1940 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1941 Server implementation by Todd Lyons, client by JH.
1942 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1943 config variable "prdr_enable" controls whether the server
1944 advertises the facility. If the client requests PRDR a new
1945 acl_data_smtp_prdr ACL is called once for each recipient, after
1946 the body content is received and before the acl_smtp_data ACL.
1947 The client is controlled by both of: a hosts_try_prdr option
1948 on the smtp transport, and the server advertisement.
1949 Default client logging of deliveries and rejections involving
1950 PRDR are flagged with the string "PRDR".
1952 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1953 fclose(). Diagnosis by Todd Lyons.
1955 PP/17 Update configure.default to handle IPv6 localhost better.
1956 Patch by Alain Williams (plus minor tweaks).
1959 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1960 This is now consistent with GnuTLS, and is now documented: the
1961 previous undocumented portable approach to treating the option as
1962 unset was to force an expansion failure. That still works, and
1963 an empty string is now equivalent.
1965 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1966 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1967 not performing validation itself.
1969 PP/20 Added force_command boolean option to pipe transport.
1970 Patch from Nick Koston, of cPanel Inc.
1972 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1975 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1977 PP/21 Fix eximon continuous updating with timestamped log-files.
1978 Broken in a format-string cleanup in 4.80, missed when I repaired the
1979 other false fix of the same issue.
1980 Report and fix from Heiko Schlichting.
1983 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1984 Report from Prashanth Katuri.
1986 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1987 It's SecureTransport, so affects any MacOS clients which use the
1988 system-integrated TLS libraries, including email clients.
1990 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1991 using a MIME ACL for non-SMTP local injection.
1992 Report and assistance in diagnosis by Warren Baker.
1994 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1996 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1998 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1999 last id that failed so it may be referenced in subsequent ACL's.
2001 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2004 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2005 ldap library initialization, allowing self-signed CA's to be
2006 used. Also properly sets require_cert option later in code by
2007 using NULL (global ldap config) instead of ldap handle (per
2008 session). Bug diagnosis and testing by alxgomz.
2010 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2011 the src/util/ subdirectory.
2013 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2014 renamed to Transport Post Delivery Action by Jeremy Harris, as
2017 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2018 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2019 redis_servers = needs to be configured which will be used by the redis
2020 lookup. Patch from Warren Baker, of The Packet Hub.
2022 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2024 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2025 hostname or reverse DNS when processing a host list. Used suggestions
2026 from multiple comments on this bug.
2028 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2030 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2031 Missed a few lines, added it to make the runtest require no keyboard
2034 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2035 contains upper case chars. Make router use caseful_local_part.
2037 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2038 support when GnuTLS has been built with p11-kit.
2044 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2046 This, or similar/improved, will also be change PP/11 of 4.82.
2052 PP/01 Handle short writes when writing local log-files.
2053 In practice, only affects FreeBSD (8 onwards).
2054 Bugzilla 1053, with thanks to Dmitry Isaikin.
2056 NM/01 Bugzilla 949 - Documentation tweak
2058 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2061 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2063 PP/02 Implemented gsasl authenticator.
2065 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2067 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2068 `pkg-config foo` for cflags/libs.
2070 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2071 with rest of GSASL and with heimdal_gssapi.
2073 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2074 `pkg-config foo` for cflags/libs for the TLS implementation.
2076 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2077 properties get this fed in as external SSF. A number of robustness
2078 and debugging improvements to the cyrus_sasl authenticator.
2080 PP/08 cyrus_sasl server now expands the server_realm option.
2082 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2083 Patch by Jeremy Harris.
2085 PP/10 Added dbmjz lookup type.
2087 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2089 PP/12 MAIL args handles TAB as well as SP, for better interop with
2090 non-compliant senders.
2091 Analysis and variant patch by Todd Lyons.
2093 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2094 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2095 Patch from Dirk Mueller <dmueller@suse.com>
2097 PP/13 tls_peerdn now print-escaped for spool files.
2098 Observed some $tls_peerdn in wild which contained \n, which resulted
2099 in spool file corruption.
2101 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2102 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2103 or write after TLS renegotiation, which otherwise led to messages
2106 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2107 as a tracking header (ie: a signed header comes before the signature).
2108 Patch from Wolfgang Breyha.
2110 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2111 comma-sep list; embedded commas doubled.
2113 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2115 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2117 Report and patch from Dmitry Banschikov.
2119 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2120 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2121 failures. We appear to now support TLS1.1+ with Exim.
2123 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2124 lets Exim select keys and certificates based upon TLS SNI from client.
2125 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2126 before an outbound SMTP session. New log_selector, +tls_sni.
2128 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2129 NULL dereference. Report and patch from Alun Jones.
2131 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2132 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2133 Not seeing resolver debug output on NetBSD, but suspect this is a
2134 resolver implementation change.
2136 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2137 Left warnings. Added "eximon gdb" invocation mode.
2139 PP/21 Defaulting "accept_8bitmime" to true, not false.
2141 PP/22 Added -bw for inetd wait mode support.
2143 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2144 locate the relevant includes and libraries. Made this the default.
2146 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2147 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2149 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2150 This may cause build issues on older platforms.
2152 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2153 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2154 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2155 Added SNI support via GnuTLS too.
2156 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2158 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2160 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2161 Applied second patch from Janne, implementing suggestion to default
2162 multiple-strings-in-record handling to match SPF spec.
2164 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2166 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2167 read-only, out of scope).
2168 Patch from Wolfgang Breyha, report from Stuart Northfield.
2170 PP/29 Fix three issues highlighted by clang analyser static analysis.
2171 Only crash-plausible issue would require the Cambridge-specific
2172 iplookup router and a misconfiguration.
2173 Report from Marcin Mirosław.
2175 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2177 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2178 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2179 As part of this, removing so much warning spew let me fix some minor
2180 real issues in debug logging.
2182 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2183 assignment on my part. Fixed.
2185 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2186 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2187 Janne Snabb (who went above and beyond: thank you).
2189 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2190 string otherwise requires a connection and a bunch more work and it's
2191 relatively easy to get wrong. Should also expose TLS library linkage
2194 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2195 64-bit ${eval} (JH/03).
2197 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2198 GNU libc to support some of the 64-bit stuff, should not lead to
2199 conflicts. Defined before os.h is pulled in, so if a given platform
2200 needs to override this, it can.
2202 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2203 protection layer was required, which is not implemented.
2204 Bugzilla 1254, patch from Wolfgang Breyha.
2206 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2207 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2208 tls_dhparam take prime identifiers. Also unbreak combination of
2209 OpenSSL+DH_params+TLSSNI.
2211 PP/39 Disable SSLv2 by default in OpenSSL support.
2217 PP/01 Solaris build fix for Oracle's LDAP libraries.
2218 Bugzilla 1109, patch from Stephen Usher.
2220 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2222 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2225 TF/02 Fix a couple more cases where we did not log the error message
2226 when unlink() failed. See also change 4.74-TF/03.
2228 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2229 lock up or crash if it happened to be inside a call to libc when it
2230 got a SIGUSR1 from exiwhat.
2232 The SIGUSR1 handler appends the current process status to the process
2233 log which is later printed by exiwhat. It used to use the general
2234 purpose logging code to do this, but several functions it calls are
2235 not safe for signals.
2237 The new output code in the SIGUSR1 handler is specific to the process
2238 log, and simple enough that it's easy to inspect for signal safety.
2239 Removing some special cases also simplifies the general logging code.
2240 Removing the spurious timestamps from the process log simplifies
2243 TF/04 Improved ratelimit ACL condition.
2245 The /noupdate option has been deprecated in favour of /readonly which
2246 has clearer semantics. The /leaky, /strict, and /readonly update modes
2247 are mutually exclusive. The update mode is no longer included in the
2248 database key; it just determines when the database is updated. (This
2249 means that when you upgrade Exim will forget old rate measurements.)
2251 Exim now checks that the per_* options are used with an update mode that
2252 makes sense for the current ACL. For example, when Exim is processing a
2253 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2254 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2255 must specify per_mail/readonly. If you omit the update mode it defaults to
2256 /leaky where that makes sense (as before) or /readonly where required.
2258 The /noupdate option is now undocumented but still supported for
2259 backwards compatibility. It is equivalent to /readonly except that in
2260 ACLs where /readonly is required you may specify /leaky/noupdate or
2261 /strict/noupdate which are treated the same as /readonly.
2263 A useful new feature is the /count= option. This is a generalization
2264 of the per_byte option, so that you can measure the throughput of other
2265 aggregate values. For example, the per_byte option is now equivalent
2266 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2268 The per_rcpt option has been generalized using the /count= mechanism
2269 (though it's more complicated than the per_byte equivalence). When it is
2270 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2271 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2272 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2273 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2274 Note that using per_rcpt with a non-readonly update mode in more than
2275 one ACL will cause the recipients to be double-counted. (The per_mail
2276 and per_byte options don't have this problem.)
2278 The handling of very low rates has changed slightly. If the computed rate
2279 is less than the event's count (usually one) then this event is the first
2280 after a long gap. In this case the rate is set to the same as this event's
2281 count, so that the first message of a spam run is counted properly.
2283 The major new feature is a mechanism for counting the rate of unique
2284 events. The new per_addr option counts the number of different
2285 recipients that someone has sent messages to in the last time period. It
2286 behaves like per_rcpt if all the recipient addresses are different, but
2287 duplicate recipient addresses do not increase the measured rate. Like
2288 the /count= option this is a general mechanism, so the per_addr option
2289 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2290 example, measure the rate that a client uses different sender addresses
2291 with the options per_mail/unique=$sender_address. There are further
2292 details in the main documentation.
2294 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2296 TF/06 Removed a few PCRE remnants.
2298 TF/07 Automatically extract Exim's version number from tags in the git
2299 repository when doing development or release builds.
2301 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2302 Bugzilla 879. Patch from Paul Fisher.
2304 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2305 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2308 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2310 PP/05 Variable $av_failed, true if the AV scanner deferred.
2311 Bugzilla 1078. Patch from John Horne.
2313 PP/06 Stop make process more reliably on build failure.
2314 Bugzilla 1087. Patch from Heiko Schlittermann.
2316 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2317 Bugzilla 1089. Patch from Heiko Schlittermann.
2319 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2320 Bugzilla 1131. Patch from Holger Weiß.
2322 PP/09 Handle IPv6 addresses with SPF.
2323 Bugzilla 860. Patch from Wolfgang Breyha.
2325 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2327 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2330 PP/11 match_* no longer expand right-hand-side by default.
2331 New compile-time build option, EXPAND_LISTMATCH_RHS.
2332 New expansion conditions, "inlist", "inlisti".
2334 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2336 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2338 PP/14 fix log_write() format string regression from TF/03.
2339 Bugzilla 1152. Patch from Dmitry Isaikin.
2345 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2347 PP/02 Harmonised TLS library version reporting; only show if debugging.
2348 Layout now matches that introduced for other libraries in 4.74 PP/03.
2350 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2352 PP/04 New "dns_use_edns0" global option.
2354 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2357 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2358 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2360 TK/01 Updated PolarSSL code to 0.14.2.
2361 Bugzilla 1097. Patch from Andreas Metzler.
2363 PP/07 Catch divide-by-zero in ${eval:...}.
2364 Fixes bugzilla 1102.
2366 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2369 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2370 format-string attack -- SECURITY: remote arbitrary code execution.
2372 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2373 time unintentionally subject to list matching rules, letting the header
2374 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2375 arbitrary string expansion). This allowed for information disclosure.
2377 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2378 INT_MIN/-1 -- value coerced to INT_MAX.
2384 NM/01 Workaround for PCRE version dependency in version reporting
2387 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2388 This fixes portability to compilers other than gcc, notably
2389 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2391 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2392 makefiles for portability to HP-UX and POSIX correctness.
2394 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2395 Also via indented variable definition in the Makefile.
2396 (Debugging by Oliver Heesakkers).
2398 PP/02 Restore caching of spamd results with expanded spamd_address.
2399 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2401 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2402 Improves build reliability. Fix from: Frank Elsner
2404 NM/02 Fix wide character breakage in the rfc2047 coding
2405 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2407 NM/03 Allow underscore in dnslist lookups
2408 Fixes bug 1026. Patch from Graeme Fowler
2410 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2411 Code patches from Adam Ciarcinski of NetBSD.
2413 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2416 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2417 is logged, to avoid truncation. Patch from John Horne.
2419 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2420 Patch from Jakob Hirsch.
2422 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2423 SQL string expansion failure details.
2424 Patch from Andrey Oktyabrski.
2426 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2427 Patch from Simon Arlott.
2429 PP/09 New lookups functionality failed to compile on old gcc which rejects
2430 extern declarations in function scope.
2431 Patch from Oliver Fleischmann
2433 PP/10 Use sig_atomic_t for flags set from signal handlers.
2434 Check getgroups() return and improve debugging.
2435 Fixed developed for diagnosis in bug 927 (which turned out to be
2438 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2439 Patch from Mark Zealey.
2441 PP/12 Bugzilla 1056: Improved spamd server selection.
2442 Patch from Mark Zealey.
2444 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2445 Based on patch from Heiko Schlittermann.
2447 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2448 Patch from Uwe Doering, sign-off by Michael Haardt.
2450 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2451 variable declaration deep within a block. Bug and patch from
2454 PP/15 lookups-Makefile IRIX compatibility coercion.
2456 PP/16 Make DISABLE_DKIM build knob functional.
2458 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2459 Patch by Simon Arlott
2461 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2462 variable argument macros. Our copy now differs from upstream.
2468 TF/01 Failure to get a lock on a hints database can have serious
2469 consequences so log it to the panic log.
2471 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2472 controlled using the smtp_confirmation log selector.
2474 TF/03 Include the error message when we fail to unlink a spool file.
2476 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2477 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2478 for maintaining out-of-tree patches for some time.
2480 PP/01 Bugzilla 139: Documentation and portability issues.
2481 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2482 Handle per-OS dynamic-module compilation flags.
2484 PP/02 Let /dev/null have normal permissions.
2485 The 4.73 fixes were a little too stringent and complained about the
2486 permissions on /dev/null. Exempt it from some checks.
2487 Reported by Andreas M. Kirchwitz.
2489 PP/03 Report version information for many libraries, including
2490 Exim version information for dynamically loaded libraries. Created
2491 version.h, now support a version extension string for distributors
2492 who patch heavily. Dynamic module ABI change.
2494 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2495 privilege escalation vulnerability whereby the Exim run-time user
2496 can cause root to append content of the attacker's choosing to
2499 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2502 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2503 If dropping privileges for untrusted macros, we disabled normal logging
2504 on the basis that it would fail; for the Exim run-time user, this is not
2505 the case, and it resulted in successful deliveries going unlogged.
2506 Fixed. Reported by Andreas Metzler.
2512 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2513 only prepend for the Resent-* case. Fixes regression introduced in
2514 Exim 4.70 by NM/22 for Bugzilla 607.
2516 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2517 increasing numbers of administrators be bitten by this.
2519 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2521 PP/03 Bugzilla 994: added openssl_options main configuration option.
2523 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2525 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2527 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2529 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2530 without a peer certificate, leading to a segfault because of an
2531 assumption that peers always have certificates. Be a little more
2532 paranoid. Problem reported by Martin Tscholak.
2534 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2535 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2536 NB: ClamAV planning to remove STREAM in "middle of 2010".
2537 CL also introduces -bmalware, various -d+acl logging additions and
2538 more caution in buffer sizes.
2540 PP/09 Implemented reverse_ip expansion operator.
2542 PP/10 Bugzilla 937: provide a "debug" ACL control.
2544 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2546 PP/12 Bugzilla 973: Implement --version.
2548 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2550 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2552 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2554 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2555 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2556 ignore trailing whitespace.
2558 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2560 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2563 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2564 Notification from Dr Andrew Aitchison.
2566 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2567 ExtendedDetectionInfo response format.
2568 Notification from John Horne.
2570 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2573 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2574 XSL and documented dependency on system catalogs, with examples of how
2577 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2580 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2581 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2582 configuration file which is writeable by the Exim user or group.
2584 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2585 of configuration files to cover files specified with the -C option if
2586 they are going to be used with root privileges, not just the default
2589 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2590 option (effectively making it always true).
2592 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2593 files to be used while preserving root privileges.
2595 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2596 that rogue child processes cannot use them.
2598 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2599 run-time user, instead of root.
2601 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2602 Exim run-time user without dropping privileges.
2604 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2605 result string, instead of calling string_vformat() twice with the same
2608 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2609 for other users. Others should always drop root privileges if they use
2610 -C on the command line, even for a whitelisted configure file.
2612 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2614 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2620 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2621 $data_path, and $header_path variables; fixed documentation bugs and
2624 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2625 exipick to access non-standard spools, including the "frozen" queue
2628 NM/01 Bugzilla 965: Support mysql stored procedures.
2629 Patch from Alain Williams
2631 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2633 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2634 Patch from Andreas Metzler
2636 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2637 Patch from Kirill Miazine
2639 NM/05 Bugzilla 671: Added umask to procmail example.
2641 JJ/03 installed exipick 20100323.0, fixing doc bug
2643 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2644 directory. Notification and patch from Dan Rosenberg.
2646 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2648 TK/02 Improve log output when DKIM signing operation fails.
2650 MH/01 Treat the transport option dkim_domain as a colon separated
2651 list, not as a single string, and sign the message with each element,
2652 omitting multiple occurences of the same signer.
2654 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2655 Bugzilla 985, 986. Patch by Simon Arlott
2657 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2658 Patch by Simon Arlott
2660 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2661 MBX locking. Notification from Dan Rosenberg.
2667 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2669 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2671 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2673 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2675 NM/04 Bugzilla 915: Flag broken perl installation during build.
2681 TK/01 Added patch by Johannes Berg that expands the main option
2682 "spamd_address" if it starts with a dollar sign.
2684 TK/02 Write list of recipients to X-Envelope-Sender header when building
2685 the mbox-format spool file for content scanning (suggested by Jakob
2688 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2689 (http://www.dcc-servers.net/) support via dccifd. Activated by
2690 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2692 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2693 by Mark Daniel Reidel <mr@df.eu>.
2695 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2696 When building exim an external PCRE library is now needed -
2697 PCRE is a system library on the majority of modern systems.
2698 See entry on PCRE_LIBS in EDITME file.
2700 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2701 conversation. Added nologin parameter to request.
2702 Patch contributed by Kirill Miazine.
2704 TF/01 Do not log submission mode rewrites if they do not change the address.
2706 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2708 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2709 log files in place. Contributed by Roberto Lima.
2711 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2713 TF/03 Bugzilla 615: When checking the local_parts router precondition
2714 after a local_part_suffix or local_part_prefix option, Exim now
2715 does not use the address's named list lookup cache, since this
2716 contains cached lookups for the whole local part.
2718 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2719 Robert Millan. Documentation is in experimental-spec.txt.
2721 TF/04 Bugzilla 668: Fix parallel build (make -j).
2723 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2725 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2726 Patch provided by Jan Srzednicki.
2728 TF/05 Leading white space used to be stripped from $spam_report which
2729 wrecked the formatting. Now it is preserved.
2731 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2732 that they are available at delivery time.
2734 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2736 TF/08 TLS error reporting now respects the incoming_interface and
2737 incoming_port log selectors.
2739 TF/09 Produce a more useful error message if an SMTP transport's hosts
2740 setting expands to an empty string.
2742 NM/06 Bugzilla 744: EXPN did not work under TLS.
2743 Patch provided by Phil Pennock.
2745 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2746 Patch provided by Richard Godbee.
2748 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2749 acl_smtp_notquit, added index entry.
2751 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2752 Patch provided by Eugene Bujak.
2754 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2755 accept(). Patch provided by Maxim Dounin.
2757 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2758 Patch provided by Phil Pennock.
2760 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2762 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2763 Patch provided by Brad "anomie" Jorsch.
2765 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2766 Patch provided by Dean Brooks.
2768 TK/05 Add native DKIM support (does not depend on external libraries).
2770 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2771 Patch provided by Graeme Fowler.
2773 NM/16 Bugzilla 851: Documentation example syntax fix.
2775 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2777 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2780 NM/19 Bugzilla 745: TLS version reporting.
2781 Patch provided by Phil Pennock.
2783 NM/20 Bugzilla 167: bool: condition support.
2784 Patch provided by Phil Pennock.
2786 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2787 clients. Patch provided by Phil Pennock.
2789 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2790 Patch provided by Brad "anomie" Jorsch.
2792 NM/23 Bugzilla 687: Fix misparses in eximstats.
2793 Patch provided by Heiko Schlittermann.
2795 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2796 Patch provided by Heiko Schlittermann.
2798 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2799 plus update to original patch.
2801 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2803 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2804 Patch provided by David Brownlee.
2806 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2808 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2810 NM/30 Bugzilla 888: TLS documentation bugfixes.
2812 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2814 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2815 Unlike the original bugzilla I have changed all shell scripts in src tree.
2817 NM/33 Bugzilla 898: Transport filter timeout fix.
2818 Patch by Todd Rinaldo.
2820 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2821 Patch by Serge Demonchaux.
2823 NM/35 Bugzilla 39: Base64 decode bug fixes.
2824 Patch by Jakob Hirsch.
2826 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2828 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2830 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2832 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2838 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2839 ALT-N's libdkim that I have put here:
2840 http://duncanthrax.net/exim-experimental/
2842 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2843 were called 'true' and it seems that C99 defines that as a reserved
2844 keyword to be used with 'bool' variable types. That means you could
2845 not include C99-style headers which use bools without triggering
2846 build errors in sieve.c.
2848 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2849 as mailq or other aliases. Changed the --help handling significantly
2850 to do whats expected. exim_usage() emits usage/help information.
2852 SC/01 Added the -bylocaldomain option to eximstats.
2854 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2856 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2858 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2864 PH/01 Another patch from the Sieve maintainer.
2866 PH/02 When an IPv6 address is converted to a string for single-key lookup
2867 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2868 dots are used instead of colons so that keys in lsearch files need not
2869 contain colons. This was done some time before quoting was made available
2870 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2871 (notated using the quote facility) so as to distinguish them from IPv4
2872 keys. This meant that lookups for IP addresses in host lists did not work
2873 for iplsearch lookups.
2875 This has been fixed by arranging for IPv6 addresses to be expressed with
2876 colons if the lookup type is iplsearch. This is not incompatible, because
2877 previously such lookups could never work.
2879 The situation is now rather anomalous, since one *can* have colons in
2880 ordinary lsearch keys. However, making the change in all cases is
2881 incompatible and would probably break a number of configurations.
2883 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2886 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2887 conversion specification without a maximum field width, thereby enabling
2888 a rogue spamd server to cause a buffer overflow. While nobody in their
2889 right mind would setup Exim to query an untrusted spamd server, an
2890 attacker that gains access to a server running spamd could potentially
2891 exploit this vulnerability to run arbitrary code as the Exim user.
2893 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2894 $primary_hostname instead of what libspf2 thinks the hosts name is.
2896 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2897 a directory entry by the name of the lookup key. Previously, if a
2898 symlink pointed to a non-existing file or a file in a directory that
2899 Exim lacked permissions to read, a lookup for a key matching that
2900 symlink would fail. Now it is enough that a matching directory entry
2901 exists, symlink or not. (Bugzilla 503.)
2903 PH/03 The body_linecount and body_zerocount variables are now exported in the
2906 PH/04 Added the $dnslist_matched variable.
2908 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2909 This means they are set thereafter only if the connection becomes
2912 PH/06 Added the client_condition to authenticators so that some can be skipped
2913 by clients under certain conditions.
2915 PH/07 The error message for a badly-placed control=no_multiline_responses left
2916 "_responses" off the end of the name.
2918 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2920 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2921 (without spaces) instead of just copying the configuration text.
2923 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2925 PH/11 Added $max_received_linelength.
2927 PH/12 Added +ignore_defer and +include_defer to host lists.
2929 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2930 way in which PCRE > 7.0 is built.
2932 PH/14 Implemented queue_only_load_latch.
2934 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2935 MAIL command. The effect was to mangle the value on 64-bit systems.
2937 PH/16 Another patch from the Sieve maintainer.
2939 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2941 PH/18 If a system quota error occurred while trying to create the file for
2942 a maildir delivery, the message "Mailbox is full" was not appended to the
2943 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2944 only to a quota excession during the actual writing of the file.
2946 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2947 characters?) which causes problems in log lines. The DN values are now
2948 passed through string_printing() before being added to log lines.
2950 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2951 and InterBase are left for another time.)
2953 PH/21 Added message_body_newlines option.
2955 PH/22 Guard against possible overflow in moan_check_errorcopy().
2957 PH/23 POSIX allows open() to be a macro; guard against that.
2959 PH/24 If the recipient of an error message contained an @ in the local part
2960 (suitably quoted, of course), incorrect values were put in $domain and
2961 $local_part during the evaluation of errors_copy.
2967 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2968 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2971 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2972 issue a MAIL command.
2974 PH/02 In an ACL statement such as
2976 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2978 if a client was not listed at all, or was listed with a value other than
2979 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2980 the condition was not true (as it should be), so access was not denied.
2981 The bug was that the ! inversion was incorrectly passed on to the second
2982 item. This has been fixed.
2984 PH/03 Added additional dnslists conditions == and =& which are different from
2985 = and & when the dns lookup returns more than one IP address.
2987 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2988 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2990 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2991 FSYNC, which compiles an option called disable_fsync that allows for
2992 bypassing fsync(). The documentation is heavily laced with warnings.
2994 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2996 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2997 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2998 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2999 including adding "make clean"; (3) Added -fPIC when compiling the test
3000 dynamically loaded module, to get rid of a warning.
3002 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3003 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3004 = 0s. The bug is otherwise harmless.
3006 PH/07 There was a bug in the dovecot authenticator such that the value of
3007 $auth1 could be overwritten, and so not correctly preserved, after a
3008 successful authentication. This usually meant that the value preserved by
3009 the server_setid option was incorrect.
3011 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3013 PH/09 Installed PCRE release 7.0.
3015 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3016 run for batched SMTP input. It is now run at the start of every message
3017 in the batch. While fixing this I discovered that the process information
3018 (output by running exiwhat) was not always getting set for -bs and -bS
3019 input. This is fixed, and it now also says "batched" for BSMTP.
3021 PH/11 Added control=no_pipelining.
3023 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3024 patch, slightly modified), and move the expansion of helo_data till after
3025 the connection is made in the smtp transport (so it can use these
3028 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3030 PH/14 Added log_selector = +pid.
3032 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3034 PH/16 Add ${if forany and ${if forall.
3036 PH/17 Added dsn_from option to vary the From: line in DSNs.
3038 PH/18 Flush SMTP output before performing a callout, unless control =
3039 no_callout_flush is set.
3041 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3042 was true (the default) a successful delivery failed to delete the retry
3043 item, thus causing premature timeout of the address. The bug is now
3046 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3048 PH/21 Long custom messages for fakedefer and fakereject are now split up
3049 into multiline responses in the same way that messages for "deny" and
3050 other ACL rejections are.
3052 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3053 with slight modification.
3055 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3056 draft, changing the syntax and factoring some duplicate code".
3058 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3059 for deliveries of the second and subsequent messages over the same SMTP
3062 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3063 ${reduce, with only minor "tidies".
3065 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3067 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3068 expansion side effects.
3070 PH/27 When a message times out after an over-quota error from an Exim-imposed
3071 quota, the bounce message says "mailbox is full". This message was not
3072 being given when it was a system quota that was exceeded. It now should
3075 MH/03 Made $recipients available in local_scan(). local_scan() already has
3076 better access to the recipient list through recipients_list[], but
3077 $recipients can be useful in postmaster-provided expansion strings.
3079 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3080 in the case of a MAIL command with additional options following the
3081 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3082 were accidentally chopped off.
3084 PH/29 SMTP synchronization checks are implemented when a command is read -
3085 there is a check that no more input is waiting when there shouldn't be
3086 any. However, for some commands, a delay in an ACL can mean that it is
3087 some time before the response is written. In this time, more input might
3088 arrive, invalidly. So now there are extra checks after an ACL has run for
3089 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3090 pipelining has not been advertised.
3092 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3094 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3095 returned in the SMTP response when smtp_return_error_details was false.
3096 This has been fixed.
3098 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3099 instead of the C I/O that was originally supplied, because problems were
3100 reported on Solaris.
3102 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3103 Exim which did not show up earlier: it was assuming that a call to
3104 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3105 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3106 was a macro that became an assignment, so it seemed to work. This has
3107 changed to a proper function call with a void return, hence the compile
3108 error. Exim's code has been fixed.
3110 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3113 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3115 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3117 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3118 because it turns out to be too big or there is a timeout) there is no
3119 "Completed" line in the log. When some messages of this type were
3120 selected by exigrep, they were listed as "not completed". Others were
3121 picked up by some special patterns. I have improved the selection
3122 criteria to be more general.
3124 PH/38 The host_find_failed option in the manualroute router can now be set
3125 to "ignore", to completely ignore a host whose IP address cannot be
3126 found. If all hosts are ignored, the behaviour is controlled by the new
3127 host_all_ignored option.
3129 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3130 homing or because of multiple MX records with /mx) generated more than
3131 one IP address, and the following item turned out to be the local host,
3132 all the secondary addresses of the first item were incorrectly removed
3133 from the list, along with the local host and any following hosts (which
3134 is what is supposed to happen).
3136 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3137 whoever called Exim into the -H file. In the case of the daemon it was
3138 behaving confusingly. When first started, it used values for whoever
3139 started the daemon, but after a SIGHUP it used the Exim user (because it
3140 calls itself on a restart). I have changed the code so that it now always
3143 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3144 message are rejected with the same error (e.g. no authentication or bad
3145 sender address), and a DATA command is nevertheless sent (as can happen
3146 with PIPELINING or a stupid MUA), the error message that was given to the
3147 RCPT commands is included in the rejection of the DATA command. This is
3148 intended to be helpful for MUAs that show only the final error to their
3151 PH/42 Another patch from the Sieve maintainer.
3153 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3154 Eximstats - Fixed some broken HTML links and added missing column headers
3156 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3157 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3159 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3161 PH/43 Yet another patch from the Sieve maintainer.
3163 PH/44 I found a way to check for a TCP/IP connection going away before sending
3164 the response to the final '.' that terminates a message, but only in the
3165 case where the client has not sent further data following the '.'
3166 (unfortunately, this is allowed). However, in many cases there won't be
3167 any further data because there won't be any more messages to send. A call
3168 to select() can be used: if it shows that the input is "ready", there is
3169 either input waiting, or the socket has been closed. An attempt to read
3170 the next input character can distinguish the two cases. Previously, Exim
3171 would have sent an OK response which the client would never have see.
3172 This could lead to message repetition. This fix should cure that, at
3173 least in a lot of common cases.
3175 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3176 advertised in response to EHLO.
3182 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3183 fixed by 4.65/MH/01 (is this a record?) are fixed:
3185 (i) An empty string was always treated as zero by the numeric comparison
3186 operators. This behaviour has been restored.
3188 (ii) It is documented that the numeric comparison operators always treat
3189 their arguments as decimal numbers. This was broken in that numbers
3190 starting with 0 were being interpreted as octal.
3192 While fixing these problems I realized that there was another issue that
3193 hadn't been noticed. Values of message_size_limit (both the global option
3194 and the transport option) were treated as octal if they started with 0.
3195 The documentation was vague. These values are now always treated as
3196 decimal, and I will make that clear in the documentation.
3202 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3203 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3206 MH/01 Don't check that the operands of numeric comparison operators are
3207 integers when their expansion is in "skipping" mode (fixes bug
3208 introduced by 4.64-PH/07).
3210 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3211 child addresses, Exim now panics and dies. Previously, because the count
3212 is held in a short int, deliveries were likely to be lost. As such a
3213 large number of recipients for a single message is ridiculous
3214 (performance will be very, very poor), I have chosen to impose a limit
3215 rather than extend the field.
3221 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3222 leftover -K file (the existence of which was triggered by #402).
3223 While we were at it, introduced process PID as part of the -K
3224 filename. This should rule out race conditions when creating
3227 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3228 processing considerably. Previous code took too long for large mails,
3229 triggering a timeout which in turn triggers #401.
3231 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3232 in the DK code in transports.c. sendfile() is not really portable,
3233 hence the _LINUX specificness.
3235 TF/01 In the add_headers option to the mail command in an Exim filter,
3236 there was a bug that Exim would claim a syntax error in any
3237 header after the first one which had an odd number of characters
3240 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3241 callout verification, Exim cached a "reject" for the entire domain. This
3242 is correct for most verifications, but it is not correct for a recipient
3243 verification with use_sender or use_postmaster set, because in that case
3244 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3245 case of MAIL FROM:<> rejection from other early rejections (e.g.
3246 rejection of HELO). When verifying a recipient using a non-null MAIL
3247 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3248 Whatever the result of the callout, the value of the domain cache is
3249 left unchanged (for any other kind of callout, getting as far as trying
3250 RCPT means that the domain itself is ok).
3252 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3255 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3256 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3257 session, the daemon ignores ECONNECT errors and logs others; it now
3258 ignores EPIPE as well.
3260 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3261 (quoted-printable decoding).
3263 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3264 later the small subsequent patch to fix an introduced bug.
3266 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3268 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3270 PH/08 An error is now given if message_size_limit is specified negative.
3272 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3273 to be given (somewhat) arbitrary names.
3275 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3278 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3279 miscellaneous code fixes
3281 PH/10 Added the log_reject_target ACL modifier to specify where to log
3284 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3285 hostname. This is wrong, because it relates to the incoming message (and
3286 probably the interface on which it is arriving) and not to the outgoing
3287 callout (which could be using a different interface). This has been
3288 changed to use the value of the helo_data option from the smtp transport
3289 instead - this is what is used when a message is actually being sent. If
3290 there is no remote transport (possible with a router that sets up host
3291 addresses), $smtp_active_hostname is used.
3293 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3294 tweaks were necessary in order to get it to work (see also 21 below):
3295 (a) The code assumed that strncpy() returns a negative number on buffer
3296 overflow, which isn't the case. Replaced with Exim's string_format()
3298 (b) There were several signed/unsigned issues. I just did the minimum
3299 hacking in of casts. There is scope for a larger refactoring.
3300 (c) The code used strcasecmp() which is not a standard C function.
3301 Replaced with Exim's strcmpic() function.
3302 (d) The code set only $1; it now sets $auth1 as well.
3303 (e) A simple test gave the error "authentication client didn't specify
3304 service in request". It would seem that Dovecot has changed its
3305 interface. Fortunately there's a specification; I followed it and
3306 changed what the client sends and it appears to be working now.
3308 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3311 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3312 address A is aliased to B and C, where B exists and C does not. Without
3313 -v the output is "A verified" because verification stops after a
3314 successful redirection if more than one address is generated. However,
3315 with -v the child addresses are also verified. Exim was outputting "A
3316 failed to verify" and then showing the successful verification for C,
3317 with its parentage. It now outputs "B failed to verify", showing B's
3318 parentage before showing the successful verification of C.
3320 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3321 look up a TXT record in a specific list after matching in a combined
3324 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3325 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3326 they consult the DNS. I had assumed they would set it the way they
3327 wanted; and indeed my experiments on Linux seem to show that in some
3328 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3329 To be on the safe side, however, I have now made the interface to
3330 host_find_byname() similar to host_find_bydns(), with an argument
3331 containing the DNS resolver options. The host_find_byname() function now
3332 sets these options at its start, just as host_find_bydns() does. The smtp
3333 transport options dns_qualify_single and dns_search_parents are passed to
3334 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3335 of host_find_byname() use the default settings of RES_DEFNAMES
3336 (qualify_single) but not RES_DNSRCH (search_parents).
3338 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3339 spool_read_header() do less string testing, by means of a preliminary
3340 switch on the second character of optional "-foo" lines. (This is
3341 overdue, caused by the large number of possibilities that now exist.
3342 Originally there were few.) While I was there, I also converted the
3343 str(n)cmp tests so they don't re-test the leading "-" and the first
3344 character, in the hope this might squeeze out yet more improvement.
3346 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3347 flag allowing group syntax was set by the header_syntax check but not
3348 turned off, possible causing trouble later; (2) The flag was not being
3349 set at all for the header_verify test, causing "group"-style headers to
3350 be rejected. I have now set it in this case, and also caused header_
3351 verify to ignore an empty address taken from a group. While doing this, I
3352 came across some other cases where the code for allowing group syntax
3353 while scanning a header line wasn't quite right (mostly, not resetting
3354 the flag correctly in the right place). These bugs could have caused
3355 trouble for malformed header lines. I hope it is now all correct.
3357 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3358 with the "reply" argument non-NULL. The code, however (which originally
3359 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3360 but it didn't always do it. This confused somebody who was copying the
3361 code for some other use. I have removed all the tests.
3363 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3364 feature that was used to support insecure browsers during the U.S. crypto
3365 embargo. It requires special client support, and Exim is probably the
3366 only MTA that supported it -- and would never use it because real RSA is
3367 always available. This code has been removed, because it had the bad
3368 effect of slowing Exim down by computing (never used) parameters for the
3369 RSA_EXPORT functionality.
3371 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3372 authenticator to fail if there's a tab character in the incoming data
3373 (there should never be unless someone is messing about, as it's supposed
3374 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3375 if the connection is using TLS or if the remote IP is the same as the
3376 local IP, and the "valid-client-cert option" if a client certificate has
3379 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3380 authenticators. This can be used for authorization after authentication
3381 succeeds. (In the case of plaintext, it servers for both authentication
3384 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3385 if any retry times were supplied.
3387 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3388 connection, where there is no client IP address to check. In this
3389 situation, the verify now always succeeds.
3391 PH/25 Applied John Jetmore's -Mset patch.
3393 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3395 PH/27 In a string expansion for a processed (not raw) header when multiple
3396 headers of the same name were present, leading whitespace was being
3397 removed from all of them, but trailing whitespace was being removed only
3398 from the last one. Now trailing whitespace is removed from each header
3399 before concatenation. Completely empty headers in a concatenation (as
3400 before) are ignored.
3402 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3403 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3405 PH/29 [Removed. This was a change that I later backed out, and forgot to
3406 correct the ChangeLog entry (that I had efficiently created) before
3407 committing the later change.]
3409 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3410 address errors (4xx response to RCPT) over the same connection as other
3411 messages routed to the same hosts. Such deliveries are always "forced",
3412 so retry times are not inspected. This resulted in far too many retries
3413 for the affected addresses. The effect occurred only when there were more
3414 hosts than the hosts_max_try setting in the smtp transport when it had
3415 the 4xx errors. Those hosts that it had tried were not added to the list
3416 of hosts for which the message was waiting, so if all were tried, there
3417 was no problem. Two fixes have been applied:
3419 (i) If there are any address or message errors in an SMTP delivery, none
3420 of the hosts (tried or untried) are now added to the list of hosts
3421 for which the message is waiting, so the message should not be a
3422 candidate for sending over the same connection that was used for a
3423 successful delivery of some other message. This seems entirely
3424 reasonable: after all the message is NOT "waiting for some host".
3425 This is so "obvious" that I'm not sure why it wasn't done
3426 previously. Hope I haven't missed anything, but it can't do any
3427 harm, as the worst effect is to miss an optimization.
3429 (ii) If, despite (i), such a delivery is accidentally attempted, the
3430 routing retry time is respected, so at least it doesn't keep
3431 hammering the server.
3433 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3434 in ${readsocket because some servers need this prod.
3436 PH/32 Added some extra debug output when updating a wait-xxx database.
3438 PH/33 The hint "could be header name not terminated by colon", which has been
3439 given for certain expansion errors for a long time, was not being given
3440 for the ${if def:h_colon_omitted{... case.
3442 PH/34 The spec says: "With one important exception, whenever a domain list is
3443 being scanned, $domain contains the subject domain." There was at least
3444 one case where this was not true.
3446 PH/35 The error "getsockname() failed: connection reset by peer" was being
3447 written to the panic log as well as the main log, but it isn't really
3448 panic-worthy as it just means the connection died rather early on. I have
3449 removed the panic log writing for the ECONNRESET error when getsockname()
3452 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3453 runs only) independently of the message's sender address. This meant
3454 that, if the 4xx error was in fact related to the sender, a different
3455 message to the same recipient with a different sender could confuse
3456 things. In particular, this can happen when sending to a greylisting
3457 server, but other circumstances could also provoke similar problems.
3458 I have changed the default so that the retry time for these errors is now
3459 based a combination of the sender and recipient addresses. This change
3460 can be overridden by setting address_retry_include_sender=false in the
3463 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3464 remote server are returned as part of bounce messages. This was not
3465 happening for LMTP over a pipe (the lmtp transport), but now it is the
3466 same for both kinds of LMTP.
3468 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3469 in header lines that were in fact CNAMEs. This is no longer the case.
3471 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3472 and queue runs started by the daemon processed all messages. This has
3473 been fixed so that -R and -S can now usefully be given with -q<time>.
3475 PH/40 Import PCRE release 6.7 (fixes some bugs).
3477 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3479 PH/42 Give an error if -q is specified more than once.
3481 PH/43 Renamed the variables $interface_address and $interface_port as
3482 $received_ip_address and $received_port, to make it clear that these
3483 values apply to message reception, and not to the outgoing interface when
3484 a message is delivered. (The old names remain recognized, of course.)
3486 PH/44 There was no timeout on the connect() call when using a Unix domain
3487 socket in the ${readsocket expansion. There now is.
3489 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3490 be meaningful with "accept".
3492 SC/01 Eximstats V1.43
3493 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3495 SC/02 Eximstats V1.44
3496 Use a glob alias rather than an array ref in the generated
3497 parser. This improves both readability and performance.
3499 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3500 Collect SpamAssassin and rejection statistics.
3501 Don't display local sender or destination tables unless
3502 there is data to show.
3503 Added average volumes into the top table text output.
3505 SC/04 Eximstats V1.46
3506 Collect data on the number of addresses (recipients)
3507 as well as the number of messages.
3509 SC/05 Eximstats V1.47
3510 Added 'Message too big' to the list of mail rejection
3511 reasons (thanks to Marco Gaiarin).
3513 SC/06 Eximstats V1.48
3514 Mainlog lines which have GMT offsets and are too short to
3515 have a flag are now skipped.
3517 SC/07 Eximstats V1.49 (Alain Williams)
3518 Added the -emptyok flag.
3520 SC/08 Eximstats V1.50
3521 Fixes for obtaining the IP address from reject messages.
3523 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3524 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3525 whitespace changes from 4.64-PH/27
3527 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3530 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3531 are found, allow negative numbers in numeric criteria)
3533 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3535 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3536 to match changes made in 4.64-PH/43
3538 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3540 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3541 "domain" is actually an IP address, and force a failure. This locks out
3542 those revolvers/nameservers that support "A-for-A" lookups, in
3543 contravention of the specifications.
3545 PH/48 When a host name was looked up from an IP address, and the subsequent
3546 forward lookup of the name timed out, the host name was left in
3547 $sender_host_name, contrary to the specification.
3549 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3550 restricted to single-key lookups, Exim was not diagnosing an error if
3551 * or *@ was used with a query-style lookup.
3553 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3555 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3556 long ago, but noone interested enough thought of it. Let's just say that
3557 the "1.1" means that there are some new functions that weren't there at
3558 some point in the past.
3560 PH/51 Error processing for expansion failure of helo_data from an smtp
3561 transport during callout processing was broken.
3563 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3564 tested/used via the -bh/-bhc/-bs options.
3566 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3567 bug, fixed in subsequent PCRE releases).
3569 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3570 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3572 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3578 SC/01 Use a glob alias rather than an array ref in eximstats generated
3579 parser. This improves both readability and performance.
3581 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3582 Don't display local sender or destination tables in eximstats unless
3583 there is data to show.
3584 Added average volumes into the eximstats top table text output.
3586 SC/03 Collect data on the number of addresses (recipients) as well
3587 as the number of messages in eximstats.
3589 TF/01 Correct an error in the documentation for the redirect router. Exim
3590 does (usually) call initgroups() when daemonizing.
3592 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3593 with consistent privilege compared to when running as a daemon.
3595 TF/03 Note in the spec that $authenticated_id is not set for local
3596 submissions from trusted users.
3598 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3599 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3601 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3602 by adding some example configuration directives to the default
3603 configuration file. A little bit of work is required to uncomment the
3604 directives and define how usernames and passwords are checked, but
3605 there is now a framework to start from.
3607 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3608 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3609 without this. I don't know how relevant this is to other LDAP libraries.
3611 PH/02 Add the verb name to the "unknown ACL verb" error.
3613 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3615 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3617 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3618 directory not expanded when it should be if an expanded home directory
3619 was set for the address (which is overridden by the transport).
3621 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3624 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3625 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3626 because it is too late at that time, and has no effect.
3628 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3629 security issue with \' (bugzilla #107). I could not use the
3630 PQescapeStringConn() function, because it needs a PGconn value as one of
3633 PH/08 When testing addresses using -bt, indicate those final addresses that
3634 are duplicates that would not cause an additional delivery. At least one
3635 person was confused, thinking that -bt output corresponded to deliveries.
3636 (Suppressing duplicates isn't a good idea as you lose the information
3637 about possibly different redirections that led to the duplicates.)
3639 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3640 systems where poll() doesn't work, in particular OS X.
3642 PH/10 Added more information to debugging output for retry time not reached.
3644 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3645 operations in malware.c.
3647 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3650 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3651 syslog_duplication set false, log lines that would normally be written
3652 both the the main log and to the reject log were not written to syslog at
3655 PH/14 In the default configuration, change the use of "message" in ACL warn
3656 statements to "add_header".
3658 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3659 not followed by a command (e.g. "seen endif").
3661 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3662 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3665 PH/17 Added extra conditions to the default value of delay_warning_condition
3669 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3670 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3671 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3674 The Auto-Submitted: and various List- headers are standardised, whereas I
3675 don't think Precedence: ever was.
3677 PH/18 Refactored debugging code in route_finduser() to show more information,
3678 in particular, the error code if getpwnam() issues one.
3680 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3681 This is apparently needed in addition to the PH/07 change above to avoid
3682 any possible encoding problems.
3684 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3685 but not after initializing Perl.
3687 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3688 output them only if debugging. By default they are written stderr,
3689 apparently, which is not desirable.
3691 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3694 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3697 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3699 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3700 authenticated or an ident call has been made. Suppress the default
3701 values for $authenticated_id and $authenticated_sender (but permit -oMai
3702 and -oMas) when testing with -bh.
3704 PH/24 Re-jigged the order of the tests in the default configuration so that the
3705 tests for valid domains and recipients precede the DNS black list and CSA
3706 tests, on the grounds that those ones are more expensive.
3708 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3709 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3710 This bug exists in every version of Exim that I still have, right back to
3713 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3714 However, an attempt to turn on case-sensitivity in a regex key by
3715 including (?-i) didn't work because the subject string was already
3716 lowercased, and the effects were non-intuitive. It turns out that a
3717 one-line patch can be used to allow (?-i) to work as expected.
3723 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3724 other effects) broke the use of negated acl sub-conditions.
3726 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3729 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3730 "Deny" causes Exim to reject the incoming connection with a 554 error.
3731 Unfortunately, if there is a major crisis, such as a disk failure,
3732 tcp-wrappers gives "deny", whereas what one would like would be some
3733 kind of temporary error. A kludge has been added to help with this.
3734 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3735 554 error is used if errno is still zero or contains ENOENT (which occurs
3736 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3739 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3741 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3742 errors. Otherwise a message that provokes a temporary error (when other
3743 messages do not) can cause a whole host to time out.
3745 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3746 addresses were routed directly to files or pipes from a redirect router.
3747 File deliveries just didn't batch; pipe deliveries might have suffered
3750 PH/06 A failure to get a lock for a hints database would erroneously always say
3751 "Failed to get write lock", even when it was really a read lock.
3753 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3754 of 0600. This has been changed to use the value of the lockfile_mode
3755 option (which defaults to 0600).
3757 PH/08 Applied small patch from the Sieve maintainer.
3759 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3760 folder from quota calculations, a direct delivery into this folder messed
3761 up the contents of the maildirsize file. This was because the regex was
3762 used only to exclude .Trash (or whatever) when the size of the mailbox
3763 was calculated. There was no check that a delivery was happening into an
3764 excluded directory. This bug has been fixed by ignoring all quota
3765 processing for deliveries into excluded directories.
3767 PH/10 Added the maildirfolder_create_regex option to appendfile.
3773 PH/01 The code for finding all the local interface addresses on a FreeBSD
3774 system running IPv6 was broken. This may well have applied to all BSD
3775 systems, as well as to others that have similar system calls. The broken
3776 code found IPv4 interfaces correctly, but gave incorrect values for the
3777 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3778 that it would not match correctly against @[] and not recognize the IPv6
3781 PH/02 The ipliteral router was not recognizing addresses of the form user@
3782 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3784 PH/03 Added disable_ipv6.
3786 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3787 decoded form, because it is most often used to construct To: headers
3788 lines in autoreplies, and the decoded form may well be syntactically
3789 invalid. However, $reply_address has leading white space removed, and all
3790 newlines turned into spaces so that the autoreply transport does not
3793 PH/05 If group was specified without a user on a router, and no group or user
3794 was specified on a transport, the group from the router was ignored.
3796 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3797 for visible compile-time settings that can be used to change these
3798 numbers, for those that want even more. Backwards compatibility with old
3799 spool files has been maintained. However, going back to a previous Exim
3800 release will lost any variables that are in spool files.
3802 PH/07 Two small changes when running in the test harness: increase delay when
3803 passing a TCP/IP connection to a new process, in case the original
3804 process has to generate a bounce, and remove special handling of
3805 127.0.0.2 (sic), which is no longer necessary.
3807 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3808 be the same on different OS.
3810 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3813 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3814 whether --show-vars was specified or not
3816 JJ/02 exipick: Added support for new ACL variable spool format introduced
3819 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3820 syntactically invalid From: or Reply-to: line, and a filter used this to
3821 generate an autoreply, and therefore failed to obtain an address for the
3822 autoreply, Exim could try to deliver to a non-existent relative file
3823 name, causing unrelated and misleading errors. What now happens is that
3824 it logs this as a hard delivery error, but does not attempt to create a
3827 PH/11 The exinext utility has a -C option for testing purposes, but although
3828 the given file was scanned by exinext itself; it wasn't being passed on
3829 when Exim was called.
3831 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3832 an end-of-file indication when reading a command response.
3834 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3835 compiled. In many other places in Exim, IPv6 addresses are always
3836 recognized, so I have changed this. It also means that IPv4 domain
3837 literals of the form [IPV4:n.n.n.n] are now always recognized.
3839 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3840 used if the router is not running as root, for example, when verifying at
3841 ACL time, or when using -bh. The debugging output from this situation was
3842 non-existent - all you got was a failure to exec. I have made two
3845 (a) Failures to set uid/gid, the current directory, or a process leader
3846 in a subprocess such as that created by queryprogram now generate
3847 suitable debugging output when -d is set.
3849 (b) The queryprogram router detects when it is not running as root,
3850 outputs suitable debugging information if -d is set, and then runs
3851 the subprocess without attempting to change uid/gid.
3853 PH/15 Minor change to Makefile for building test_host (undocumented testing
3856 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3857 additional section of a DNS packet that returns MX or SRV records.
3858 Instead, it always explicitly searches for A/AAAA records. This avoids
3859 major problems that occur when a DNS server includes only records of one
3860 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3861 fixed another bug: if SRV records were looked up and the corresponding
3862 address records were *not* found in the additional section, the port
3863 values from the SRV records were lost.
3865 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3866 using the correct key (the original address) when searching the retry
3867 rules in order to find which one to use for generating the retry hint.
3869 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3870 adding the default one. Similarly, if it contains a Reply-To: header, the
3871 errors_reply_to option, if set, is not used.
3873 PH/19 When calculating a retry time, Exim used to measure the "time since
3874 failure" by looking at the "first failed" field in the retry record. Now
3875 it does not use this if it is later than than the arrival time of the
3876 message. Instead it uses the arrival time. This makes for better
3877 behaviour in cases where some deliveries succeed, thus re-setting the
3878 "first failed" field. An example is a quota failure for a huge message
3879 when small messages continue to be delivered. Without this change, the
3880 "time since failure" will always be short, possible causing more frequent
3881 delivery attempts for the huge message than are intended.
3882 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3884 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3885 $1, $2, $3) because the numerical variables can be reset during some
3886 expansion items (e.g. "match"), thereby losing the authentication data.
3888 PH/21 Make -bV show the size of off_t variables so that the test suite can
3889 decide whether to run tests for quotas > 2G.
3891 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3892 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3893 filecount value is greater than 2G or if a quota value is greater than 2G
3894 on a system where the size of off_t is not greater than 4, a panic error
3897 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3898 never match. The debug and -bh output now contains an explicit error
3899 message indicating a malformed IPv4 address or mask.
3901 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3902 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3903 PH/23 above applies.
3905 PH/25 Do not write to syslog when running in the test harness. The only
3906 occasion when this arises is a failure to open the main or panic logs
3907 (for which there is an explicit test).
3909 PH/26 Added the /no_tell option to "control=freeze".
3911 PH/27 If a host name lookup failed very early in a connection, for example, if
3912 the IP address matched host_lookup and the reverse lookup yielded a name
3913 that did not have a forward lookup, an error message of the form "no IP
3914 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3915 could be logged. Now it outputs the IP address instead of "NULL".
3917 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3918 allows the sender and the authenticated sender to be set when
3919 submitting a message from within Exim. Since child_open_exim() is
3920 documented for local_scan(), the new function should be too.
3922 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3923 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3924 results in an empty string is now treated as unset.
3926 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3928 PH/31 Added sender_verify_fail logging option.
3930 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3931 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3932 tidied the source and removed it altogether.
3934 PH/33 When a queue run was abandoned because the load average was too high, a
3935 log line was always written; now it is written only if the queue_run log
3936 selector is set. In addition, the log line for abandonment now contains
3937 information about the queue run such as the pid. This is always present
3938 in "start" and "stop" lines but was omitted from the "abandon" line.
3940 PH/34 Omit spaces between a header name and the colon in the error message that
3941 is given when verify = headers_syntax fails (if there are lots of them,
3942 the message gets confusing).
3944 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3945 names, as there are now some PTR records that contain slashes. This check
3946 is only to protect against broken name servers that fall over on strange
3947 characters, so the fact that it applies to all lookups doesn't matter.
3949 PH/36 Now that the new test suite is complete, we can remove some of the
3950 special code in Exim that was needed for the old test suite. For example,
3951 sorting DNS records because real resolvers return them in an arbitrary
3952 order. The new test suite's fake resolver always returns records in the
3955 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3956 bounces) except when queue_only is set, to avoid logging races between
3957 the different processes.
3959 PH/38 Panic-die if .include specifies a non-absolute path.
3961 PH/39 A tweak to the "H" retry rule from its user.
3963 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3964 a label. They prevented compilation on older perls.
3966 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3967 a warning to be raised on newish perls.
3969 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3970 on queue. Changes to match documented behaviour of showing count of
3971 messages matching specified criteria.
3973 PH/40 Changed the default ident timeout from 30s to 5s.
3975 PH/41 Added support for the use of login_cap features, on those BSD systems
3976 that have them, for controlling the resources used by pipe deliveries.
3978 PH/42 The content-scanning code uses fopen() to create files in which to put
3979 message data. Previously it was not paying any attention to the mode of
3980 the files. Exim runs with umask(0) because the rest of the code creates
3981 files with open(), and sets the required mode explicitly. Thus, these
3982 files were ending up world-writeable. This was not a big issue, because,
3983 being within the spool directory, they were not world-accessible. I have
3984 created a function called modefopen, which takes an additional mode
3985 argument. It sets umask(777), creates the file, chmods it to the required
3986 mode, then resets the umask. All the relevant calls to fopen() in the
3987 content scanning code have been changed to use this function.
3989 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3990 to 24 hours. This avoids potential overflow problems when processing G
3991 and H retry rules. I suspect nobody ever tinkers with this value.
3993 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3995 PH/45 When the plaintext authenticator is running as a client, the server's
3996 challenges are checked to ensure they are valid base64 strings. By
3997 default, the authentication attempt is cancelled if an invalid string is
3998 received. Setting client_ignore_invalid_base64 true ignores these errors.
3999 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4000 they are received. Thus, the responses can be made to depend on the
4001 challenges. If an invalid string is ignored, an empty string is placed in
4004 PH/46 Messages that are created by the autoreply transport now contains a
4005 References: header, in accordance with RFCs 2822 and 3834.
4007 PH/47 Added authenticated_sender_force to the smtp transport.
4009 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4011 PH/49 Installed latest patch from the Sieve maintainer.
4013 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4014 was also set, the appendfile transport was unnecessarily scanning a
4015 directory of message files (e.g. for maildir delivery) to find the count
4016 of files (along with the size), even though it did not need this
4017 information. It now does the scan only if it needs to find either the
4018 size of the count of files.
4020 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4022 PH/52 Two bugs concerned with error handling when the smtp transport is
4025 (i) Exim was not creating retry information for temporary errors given
4026 for individual recipients after the DATA command when the smtp transport
4027 was used in LMTP mode. This meant that they could be retried too
4028 frequently, and not timed out correctly.
4030 (ii) Exim was setting the flag that allows error details to be returned
4031 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4032 recipients that were returned after the DATA command.
4034 PH/53 This is related to PH/52, but is more general: for any failing address,
4035 when detailed error information was permitted to be returned to the
4036 sender, but the error was temporary, then after the final timeout, only
4037 "retry timeout exceeded" was returned. Now it returns the full error as
4038 well as "retry timeout exceeded".
4040 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4041 do this, and (what is worse) MTAs that accept it.
4043 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4044 will now be deprecated.
4046 PH/56 New os.c-cygwin from the Cygwin maintainer.
4048 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4049 formats (previously only available in exim formats via -bpr, -bpru,
4050 and -bpra. Now also available in native and exiqgrep formats)
4052 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4053 with very large, slow to parse queues
4055 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4057 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4059 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4060 responses to authentication challenges, though it was showing the
4061 challenges; (ii) I've removed the CR characters from the debug output for
4064 PH/58 Allow for the insertion of a newline as well as a space when a string
4065 is turned into more than one encoded-word during RFC 2047 encoding. The
4066 Sieve code now uses this.
4068 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4069 data_4xx, lost_connection, tls_required.
4071 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4072 message was being sent as an SMTP response.
4074 PH/61 Add -l and -k options to exicyclog.
4076 PH/62 When verifying, if an address was redirected to one new address, so that
4077 verification continued, and the new address failed or deferred after
4078 having set something in $address_data, the value of $address_data was not
4079 passed back to the ACL. This was different to the case when no
4080 redirection occurred. The value is now passed back in both cases.
4082 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4083 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4084 use login_cap.h, so on its own it isn't the distinguishing feature. The
4085 new name refers directly to the setclassresources() function.
4087 PH/65 Added configuration files for NetBSD3.
4089 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4091 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4092 is preferred over IPv4.
4094 PH/68 The bounce_return_message and bounce_return_body options were not being
4095 honoured for bounces generated during the reception of non-SMTP messages.
4096 In particular, this applied to messages rejected by the ACL. This bug has
4097 been fixed. However, if bounce_return_message is true and bounce_return_
4098 body is false, the headers that are returned for a non-SMTP message
4099 include only those that have been read before the error was detected.
4100 (In the case of an ACL rejection, they have all been read.)
4102 PH/69 The HTML version of the specification is now built in a directory called
4103 spec_html instead of spec.html, because the latter looks like a path with
4104 a MIME-type, and this confuses some software.
4106 PH/70 Catch two compiler warnings in sieve.c.
4108 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4109 function verify_get_ident() calls ip_connect() to connect a socket, but
4110 if the "connect()" function timed out, ip_connect() used to close the
4111 socket. However, verify_get_ident() also closes the socket later, and in
4112 between Exim writes to the log, which may get opened at this point. When
4113 the socket was closed in ip_connect(), the log could get the same file
4114 descriptor number as the socket. This naturally causes chaos. The fix is
4115 not to close the socket in ip_connect(); the socket should be closed by
4116 the function that creates it. There was only one place in the code where
4117 this was missing, in the iplookup router, which I don't think anybody now
4118 uses, but I've fixed it anyway.
4120 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4121 well as to direct DNS lookups. Otherwise the handling of names in host
4122 lists is inconsistent and therefore confusing.
4128 PH/01 Two changes to the default runtime configuration:
4130 (1) Move the checks for relay_from_hosts and authenticated clients from
4131 after to before the (commented out) DNS black list checks.
4133 (2) Add control=submission to the relay_from_hosts and authenticated
4134 clients checks, on the grounds that messages accepted by these
4135 statements are most likely to be submissions.
4137 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4139 (1) Generate an error if the third argument for the ${prvs expansion is
4142 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4145 (3) Reset the variables that are obtained from the first argument of
4146 ${prvscheck and used in the second argument before leaving the code,
4147 because their memory is reclaimed, so using them afterwards may do
4150 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4151 one (it's much easier than Tom thought :-).
4153 (5) Because of (4), we can now allow for the use of $prvscheck_result
4154 inside the third argument.
4156 PH/03 For some reason, the default setting of PATH when running a command from
4157 a pipe transport was just "/usr/bin". I have changed it to
4160 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4161 anything to be listed in the output from -bV.
4163 PH/05 When a filter generated an autoreply, the entire To: header line was
4164 quoted in the delivery log line, like this:
4166 => >A.N.Other <ano@some.domain> <original@ddress> ...
4168 This has been changed so that it extracts the operative address. There
4169 may be more than one such address. If so, they are comma-separated, like
4172 => >ano@some.domain,ona@other.domain <original@ddress> ...
4174 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4175 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4176 not being looked up in the rDNS to get a host name, Exim was showing the
4177 IP address twice in Received: lines, even though the IP addresses were
4178 identical. For example:
4180 Received: from [1.2.3.4] (helo=[1.2.3.4])
4182 However, if the real host name was known, it was omitting the HELO data
4183 if it matched the actual IP address. This has been tidied up so that it
4184 doesn't show the same IP address twice.
4186 PH/07 When both +timestamp and +memory debugging was on, the value given by
4187 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4188 called by the debug printing, thereby overwriting the timestamp buffer.
4189 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4191 PH/08 When the original message was included in an autoreply transport, it
4192 always said "this is a copy of the message, including all the headers",
4193 even if body_only or headers_only was set. It now gives an appropriate
4196 PH/09 Applied a patch from the Sieve maintainer which:
4198 o fixes some comments
4199 o adds the (disabled) notify extension core
4200 o adds some debug output for the result of if/elsif tests
4201 o points to the current vacation draft in the documentation
4202 and documents the missing references header update
4206 o fixes a bug in processing the envelope test (when testing
4207 multiple envelope elements, the last element determined the
4210 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4211 Electronic Mail") by including:
4213 Auto-submitted: auto-generated
4215 in the messages that it generates (bounce messages and others, such as
4216 warnings). In the case of bounce messages for non-SMTP messages, there was
4217 also a typo: it was using "Auto_submitted" (underscore instead of
4218 hyphen). Since every message generated by Exim is necessarily in response
4219 to another message, thes have all been changed to:
4221 Auto-Submitted: auto-replied
4223 in accordance with these statements in the RFC:
4225 The auto-replied keyword:
4227 - SHOULD be used on messages sent in direct response to another
4228 message by an automatic process,
4230 - MUST NOT be used on manually-generated messages,
4232 - MAY be used on Delivery Status Notifications (DSNs) and Message
4233 Disposition Notifications (MDNs),
4235 - MUST NOT be used on messages generated by automatic or periodic
4236 processes, except for messages which are automatic responses to
4239 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4240 to the default Received: header definition.
4242 PH/12 Added log selector acl_warn_skipped (default on).
4244 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4245 variables because (a) they are in the wrong storage pool and (b) even if
4246 they were copied, it wouldn't work properly because of the caching.
4248 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4249 checking when decoding. Apparently there are clients that generate
4250 overlong encoded strings. Why am I not surprised?
4252 PH/15 If the first argument of "${if match_address" was not empty, but did not
4253 contain an "@" character, Exim crashed. Now it writes a panic log message
4254 and treats the condition as false.
4256 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4258 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4259 extension "envelope-auth". The code is finished and in agreement with
4260 other implementations, but there is no documentation so far and in fact,
4261 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4262 not changing the active code.
4264 Print executed "if" and "elsif" statements when debugging is used. This
4265 helps a great deal to understand what a filter does.
4267 Document more things not specified clearly in RFC3028. I had all this
4268 sorted out, when out of a sudden new issues came to my mind. Oops."
4270 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4273 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4274 canonical form (as documented). However, after a host name lookup from
4275 the IP address, check_host() was doing a simple string comparison with
4276 addresses acquired from the DNS when checking that the found name did
4277 have the original IP as one of its addresses. Since any found IPv6
4278 addresses are likely to be in abbreviated form, the comparison could
4279 fail. Luckily, there already exists a function for doing the comparison
4280 by converting both addresses to binary, so now that is used instead of
4281 the text comparison.
4283 PH/20 There was another similar case to PH/19, when a complete host name was
4284 given in a host list; looking up its IP address could give an abbreviated
4285 form, whereas the current host's name might or might not be abbreviated.
4286 The same fix has been applied.
4292 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4293 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4296 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4297 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4299 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4301 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4302 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4303 Also, for "Auto-Submitted", treat anything other than "no" as
4304 non-personal, in accordance with RFC 3834. (Previously it treated
4305 anything starting "auto-" as non-personal.)
4307 TF/01 The control=submission/name=... option had a problem with syntax
4308 errors if the name included a slash character. The /name= option
4309 now slurps the rest of the string, so it can include any characters
4310 but it must come last in the list of options (after /sender_retain
4313 PH/05 Some modifications to the interface to the fake nameserver for the new
4321 TK/01 Added the "success_on_redirect" address verification option. See
4322 NewStuff for rationale and an example.
4324 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4326 PH/02 Patch to exigrep to allow it to work on syslog lines.
4328 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4329 fread() to skip over the body file's header line, because in Cygwin the
4330 header line is locked and is inaccessible.
4332 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4333 co-exist for some time) to make it clear that it is the Exim ID that is
4334 referenced, not the Message-ID: header line.
4336 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4337 string_format() function, because snprintf() does not exist on all
4340 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4341 ${stat: expansion item.
4343 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4344 protocol synchronization error", to keep the pedants happy.
4346 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4347 well as for IRIX systems, when gcc is being used. See the host.c source
4350 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4352 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4355 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4356 transport and to the smtp transport in LMTP mode.
4358 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4360 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4361 run a filter in a subprocess. This could lead to confusion in subsequent
4362 lookups in the parent process. There should also be a search_tidyup() at
4363 the end of the subprocess.
4365 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4366 only if the host matched helo_try_verify_hosts, which caused the
4367 verification to occur when the EHLO/HELO command was issued. The ACL just
4368 tested the remembered result. Now, if a previous verification attempt has
4369 not happened, "verify = helo" does it there and then.
4371 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4373 TK/03 Fix log output including CR from clamd.
4375 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4376 exist provoked a memory error which could cause a segfault.
4378 PH/15 Installed PCRE 6.2
4380 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4382 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4383 of the problem. Specifically, suggested +O2 rather than +O1 for the
4386 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4388 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4389 record, the port was not correctly logged when the outgoing_port log
4390 selector was set (it logged the transort's default port).
4392 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4393 fallback_hosts, and "hosts" in the smtp transport.
4395 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4396 host errors such as "Connection refused".
4398 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4399 authentication with radiusclient 0.4.9:
4401 - Error returned from rc_read_config was caught wrongly
4402 - Username/password not passed on to radius server due to wrong length.
4404 The presumption is that some radiusclient API changes for 4.51/PH/17
4405 were not taken care of correctly. The code is still untested by me (my
4406 Linux distribution still has 0.3.2 of radiusclient), but it was
4407 contributed by a Radius user.
4409 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4410 expanding the "port" option of the smtp transport.
4412 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4413 while reading a MIME header. Thanks to Tom Hughes for a patch.
4415 PH/24 Include config.h inside local_scan.h so that configuration settings are
4418 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4419 that in an ACL for RCPT (for example), you can examine exactly what was
4422 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4423 commands, but it was not correctly comparing the address with the actual
4424 client host address. Thus, it would show the EHLO address in Received:
4425 header lines when this was not necessary.
4427 PH/27 Added the % operator to ${eval:}.
4429 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4430 it should be ignoring failures (because with -C, for example, it has lost
4431 privilege). It wasn't ignoring creation failures other than "already
4434 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4437 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4438 because an input line was too long, either on its own, or by virtue of
4439 too many continuations, the temporary file was not being removed, and the
4440 return code was incorrect.
4442 PH/31 Missing "BOOL" in function definition in filtertest.c.
4444 PH/32 Applied Sieve patches from the maintainer.
4446 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4448 PH/33 Added "verify = not_blind".
4450 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4451 Local/Makefile (with some defaults set). These are used in built scripts
4452 such as exicyclog, but they have never been used in the exim_install
4453 script (though there are many overriding facilities there). I have
4454 arranged that the exim_install script now takes note of these two
4457 PH/35 Installed configuration files for Dragonfly.
4459 PH/36 When a locally submitted message by a trusted user did not contain a
4460 From: header, and the sender address was obtained from -f or from an SMTP
4461 MAIL command, and the trusted user did not use -F to supply a sender
4462 name, $originator_name was incorrectly used when constructing a From:
4463 header. Furthermore, $originator_name was used for submission mode
4464 messages from external hosts without From: headers in a similar way,
4465 which is clearly wrong.
4467 PH/37 Added control=suppress_local_fixups.
4469 PH/38 When log_selector = +received_sender was set, and the addition of the
4470 sender made the log line's construction buffer exactly full, or one byte
4471 less than full, an overflow happened when the terminating "\n" was
4474 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4475 when the result of a list match is failure because a DNS lookup failed.
4477 PH/40 RM_COMMAND is now used in the building process.
4479 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4480 the "build-* directories that it finds.
4482 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4483 address in a domain literal was a prefix of an interface address.
4485 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4486 when verifying a sender address, unless rewrite_headers is false.
4488 PH/44 Wrote a long comment about why errors_to addresses are verified as
4489 recipients, not senders.
4491 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4492 the ratelimit ACL was added.
4494 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4496 PH/46 Added extra information about PostgreSQL errors to the error string.
4498 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4499 avoiding the need to install special zones in a real server. This is
4500 backwards compatible; if it can't find the fake resolver, it drops back.
4501 Thus, both old and new test suites can be run.
4503 TF/02 Added util/ratelimit.pl
4505 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4506 clock is set back in time.
4508 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4509 Candler <B.Candler@pobox.com>.
4511 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4512 OK for addresses that are the result of redirections.
4514 PH/48 A number of further additions for the benefit of the new test suite,
4515 including a fake gethostbyname() that interfaces to the fake DNS resolver
4518 TF/06 The fix for widen_domains has also been applied to qualify_single and
4519 search_parents which are the other dnslookup options that can cause
4522 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4525 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4527 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4528 service" if it encountered an MX record with an empty target hostname.
4529 The message is now "an MX or SRV record indicated no SMTP service".
4531 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4532 if the DNS of the sending site is misconfigured. This is quite a
4533 common situation. This change restores the behaviour of treating a
4534 helo verification defer as a failure.
4536 PH/51 If self=fail was set on a router, the bounce message did not include the
4537 actual error message.
4543 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4545 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4546 command itself ended in error, the underlying message about the transport
4547 filter timeout was being overwritten with the pipe command error. Now the
4548 underlying error message should be appended to the second error message.
4550 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4552 PH/02 Reduce the amount of output that "make" produces by default. Full output
4553 can still be requested.
4555 PH/03 The warning log line about a condition test deferring for a "warn" verb
4556 was being output only once per connection, rather than after each
4557 occurrence (because it was using the same function as for successful
4558 "warn" verbs). This seems wrong, so I have changed it.
4560 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4561 it should not have, which might have caused a crash in the right
4562 circumstances, but probably never did.
4564 PH/04 Installed a modified version of Tony Finch's patch to make submission
4565 mode fix the return path as well as the Sender: header line, and to
4566 add a /name= option so that you can make the user's friendly name appear
4569 TF/03 Added the control = fakedefer ACL modifier.
4571 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4572 Mark Lowes for thorough testing.
4574 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4576 TK/03 Merged latest SRS patch from Miles Wilton.
4578 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4579 with the definition in sysexits.h (which is #included earlier).
4580 Fortunately, Exim does not actually use EX_OK. The code used to try to
4581 preserve the sysexits.h value, by assuming that macro definitions were
4582 scanned for macro replacements. I have been disabused of this notion,
4583 so now the code just undefines EX_OK before #including unistd.h.
4585 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4586 in the smtp transport. When a block could not be written in a single
4587 write() function, the timeout was being re-applied to each part-write.
4588 This seems wrong - if the receiver was accepting one byte at a time it
4589 would take for ever. The timeout is now adjusted when this happens. It
4590 doesn't have to be particularly precise.
4592 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4593 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4595 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4596 without a domain if the check to <postmaster@domain> fails.
4598 SC/01 Eximstats: added -xls and the ability to specify output files
4599 (patch written by Frank Heydlauf).
4601 SC/02 Eximstats: use FileHandles for outputting results.
4603 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4605 SC/04 Eximstats: fixed display of large numbers with -nvr option
4607 SC/05 Eximstats: fixed merging of reports with empty tables.
4609 SC/06 Eximstats: added the -include_original_destination flag
4611 SC/07 Eximstats: removed tabs and trailing whitespace.
4613 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4615 TK/06 MBOX spool code: Add real "From " MBOX separator line
4616 so the .eml file is really in mbox format (even though
4617 most programs do not really care). Patch from Alex Miller.
4619 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4620 The latter is generated from $received_to and is only set if the
4621 message has one envelope recipient. SA can use these headers,
4622 obviously out-of-the-box. Patch from Alex Miller.
4624 PH/08 The ${def test on a variable was returning false if the variable's
4625 value was "0", contrary to what the specification has always said!
4626 The result should be true unless the variable is empty.
4628 PH/09 The syntax error of a character other than { following "${if
4629 def:variable_name" (after optional whitespace) was not being diagnosed.
4630 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4631 accidental colon was present, for example, could give incorrect results.
4633 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4634 result is used (not including appendfile, where other changes are about
4637 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4638 This involved changing a lot of size variables from int to off_t. It
4639 should work with maildirs and everything.
4641 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4642 spamd dying while we are connected to it.
4644 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4647 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4648 function for BDB 4.3.
4650 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4652 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4653 the sources for PCRE have been re-arranged and more files are now
4656 PH/15 The code I had for printing potentially long long variables in PH/11
4657 above was not the best (it lost precision). The length of off_t variables
4658 is now inspected at build time, and an appropriate printing format (%ld
4659 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4660 to be "long long int" or "long int". This is needed for the internal
4661 formatting function string_vformat().
4663 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4664 the configuration file to be ":syslog", then the script "guesses" where
4665 the logs files are, rather than using the compiled in default. In our
4666 case the guess is not the same as the compiled default, so the script
4667 suddenly stopped working when I started to use syslog. The patch checks
4668 to see if log_file_path is "". If so, it attempts to read it from exim
4669 with no configuration file to get the compiled in version, before it
4670 falls back to the previous guessing code."
4672 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4673 implementing BATV in an Exim configuration. See NewStuff for the gory
4676 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4677 Makefile that are specific to HP-UX.
4679 PH/18 If the "use_postmaster" option was set for a recipient callout together
4680 with the "random" option, the postmaster address was used as the MAIL
4681 FROM address for the random test, but not for the subsequent recipient
4682 test. It is now used for both.
4684 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4685 patch removes a few documentation additions to RFC 3028, because the
4686 latest draft now contains them. It adds the new en;ascii-case comparator
4687 and a new error check for 8bit text in MIME parts. Comparator and
4688 require names are now matched exactly. I enabled the subaddress
4689 extension, but it is not well tested yet (read: it works for me)."
4691 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4692 rework some of the code of TK/09 above to avoid the hardwired use of
4693 "%lld" and "long long". Replaced the call to snprintf() with a call to
4696 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4697 records point to non-existent hosts", "retry timeout exceeded", and
4698 "retry time not reached for any host after a long failure period".
4700 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4701 experimental DomainKeys support:
4703 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4704 (2) On an error such as an illegally used "control", the wrong name for
4705 the control was given.
4707 These problems did NOT occur unless DomainKeys support was compiled.
4709 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4711 PH/24 Added ${if match_ip condition.
4713 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4714 databases so that it will be absolutely obvious if a crash occurs in the
4715 DB library. This is a regular occurrence (often caused by mis-matched
4718 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4719 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4720 picked up on a user's system that detects such things. There doesn't seem
4721 to be a gcc warning option for this - only an attribute that has to be
4722 put on the function's prototype. It seems that in Fedora Core 4 they have
4723 set this on a number of new functions. No doubt there will be more in due
4726 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4727 specify a transport. However, if an address that was verified by such a
4728 router was the subject of a callout, Exim crashed because it tried to
4729 read the rcpt_include_affixes from the non-existent transport. Now it
4730 just assumes that the setting of that option is false. This bug was
4731 introduced by 4.51/PH/31.
4733 PH/28 Changed -d+all to exclude +memory, because that information is very
4734 rarely of interest, but it makes the output a lot bigger. People tend to
4735 do -d+all out of habit.
4737 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4738 code in os-type was giving problems when libc.so lives in lib64, like on
4741 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4742 aren't the modern standard, and it seems that some systems' include files
4743 don't always have them. Exim was already checking for some of the newer
4744 ones like T_AAAA, and defining it itself. I've added checks for all the
4745 record types that Exim uses.
4747 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4748 not automatically generating a new one, as it is supposed to. This
4749 prevented TLS from working. If the file did exist, but contained invalid
4750 data, a new version was generated, as expected. It was only the case of a
4751 non-existent file that was broken.
4753 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4754 with a change in libdomainkeys > 0.64.
4756 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4757 from DNS. If the selector record carries the flag, it now has
4758 precedence over the domain-wide flag.
4760 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4762 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4763 the use of a port name that isn't defined in /etc/services) occurred, the
4764 message was deferred as in a normal delivery, and thus remained on the
4765 spool, instead of being failed because of the mua_wrapper setting. This
4766 is now fixed, and I tidied up some of the mua_wrapper messages at the
4769 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4770 the messages in a hash of arrays rather than using individual hashes.
4771 This is a bit cleaner and results in dramatic memory savings, albeit
4772 at a slight CPU cost.
4774 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4775 as requested by Marc Sherman.
4777 SC/10 Eximstats: added histograms for user specified patterns as requested
4780 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4782 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4783 fopen() in the content-scanning modules that did not already have it.
4789 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4790 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4792 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4794 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4796 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4797 to test Sieve filters that use "vacation".
4799 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4800 that changes the way the GnuTLS parameters are stored in the cache file.
4801 The new format can be generated externally. For backward compatibility,
4802 if the data in the cache doesn't make sense, Exim assumes it has read an
4803 old-format file, and it generates new data and writes a new file. This
4804 means that you can't go back to an older release without removing the
4807 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4808 work if there are any delivery delays because "one_time" forces the
4809 parent to be marked "delivered", so its unseen clone is never tried
4810 again. For this reason, Exim now forbids the simultaneous setting of
4813 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4814 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4815 entry if you want to know the details. The fix, however, neglected to
4816 consider the case when local delivery batching is involved. The test for
4817 "previously delivered" was not happening when checking to see if an
4818 address could be batched with a previous (undelivered) one; under
4819 certain circumstances this could lead to multiple deliveries to the same
4822 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4823 in its include files, and this causes problems building Exim.
4825 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4826 header_syntax) but Exim was just ignoring anything given after a slash.
4827 In particular, this caused confusion with an attempt to use "verify =
4828 reverse_host_lookup/defer_ok". An error is now given when options are
4829 supplied for verify items that do not have them. (Maybe reverse_host_
4830 lookup should have a defer_ok option, but that's a different point.)
4832 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4833 defined by RFC 821) to 2048, because there were problems with some AUTH
4834 commands, and RFC 1869 says the size should be increased for extended
4835 SMTP commands that take arguments.
4837 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4840 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4841 "unknown" error; now it says that the functionality isn't in the binary.
4843 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4844 an address' error message when a string expansion fails (syntax or
4845 whatever). Otherwise the password may appear in the log. Following change
4846 PH/42 below, there is no longer a chance of it appearing in a bounce
4849 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4851 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4852 of its addresses was ever tried. (Bugzilla bug #2.)
4854 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4855 the result incorrectly in the debug output. (It correctly added a newline
4856 to what was transported.)
4858 TF/01 Added $received_time.
4860 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4861 commented out examples of how to interface to a virus scanner and to
4862 SpamAssassin. Also added commented examples of av_scanner and
4863 spamd_address settings.
4865 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4866 and controls are allowed in which ACLs. There were a couple of minor
4867 errors. Some of the entries in the conditions table (which is a table of
4868 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4869 negation of where the condition IS allowed.
4871 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4873 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4874 header file does not have a version number, so I've had to invent a new
4875 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4876 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4877 radiusclient), but it was contributed by a Radius user.
4879 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4880 files or directories, for OpenSSL.
4882 PH/19 When an Exim process that is running as root has to create an Exim log
4883 file, it does so in a subprocess that runs as exim:exim so as to get the
4884 ownership right at creation (otherwise, other Exim processes might see
4885 the file with the wrong ownership). There was no test for failure of this
4886 fork() call, which would lead to the process getting stuck as it waited
4887 for a non-existent subprocess. Forks do occasionally fail when resources
4888 run out. I reviewed all the other calls to fork(); they all seem to check
4891 PH/20 When checking for unexpected SMTP input at connect time (before writing
4892 the banner), Exim was not dealing correctly with a non-positive return
4893 from the read() function. If the client had disconnected by this time,
4894 the result was a log entry for a synchronization error with an empty
4895 string after "input=" when read() returned zero. If read() returned -1
4896 (an event I could not check), uninitialized data bytes were printed.
4897 There were reports of junk text (parts of files, etc) appearing after
4900 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4902 PH/22 Added support for macro redefinition, and (re)definition in between
4903 driver and ACL definitions.
4905 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4906 forgetting to use the resulting value; it was using the unexpanded value.
4908 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4909 hadn't been configured. The fix is from Juergen Kreileder, who
4910 understands it better than I do:
4912 "Here's what I see happening with three configured cyrus_sasl
4913 authenticators configured (plain, login, cram-md5):
4915 On startup auth_cyrus_sasl_init() gets called for each of these.
4916 This means three calls to sasl_listmech() without a specified mech_list.
4917 => SASL tests which mechs of all available mechs actually work
4918 => three warnings about OTP not working
4919 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4921 With the patch, sasl_listmech() also gets called three times. But now
4922 SASL's mech_list option is set to the server_mech specified in the the
4923 authenticator. Or in other words, the answer from sasl_listmech()
4924 gets limited to just the mech you're testing for (which is different
4926 => the return list contains just 'plain' or 'login', 'cram-md5' or
4927 nothing depending on the value of ob->server_mech.
4929 I've just tested the patch: Authentication still works fine,
4930 unavailable mechs specified in the exim configuration are still
4931 caught, and the auth.log warnings about OTP are gone."
4933 PH/25 When debugging is enabled, the contents of the command line are added
4934 to the debugging output, even when log_selector=+arguments is not
4937 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4938 answer is "GNU", and only if the return is "GNU/something" is the answer
4941 PH/27 $acl_verify_message is now set immediately after the failure of a
4942 verification in an ACL, and so is available in subsequent modifiers. In
4943 particular, the message can be preserved by coding like this:
4945 warn !verify = sender
4946 set acl_m0 = $acl_verify_message
4948 Previously, $acl_verify_message was set only while expanding "message"
4949 and "log_message" when a very denied access.
4951 PH/28 Modified OS/os.c-Linux with
4953 -#ifndef OS_LOAD_AVERAGE
4954 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4956 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4957 nomenclature these days.)
4959 PH/29 Installed patch from the Sieve maintainer that adds the options
4960 sieve_useraddress and sieve_subaddress to the redirect router.
4962 PH/30 In these circumstances:
4963 . Two addresses routed to the same list of hosts;
4964 . First host does not offer TLS;
4965 . First host accepts first address;
4966 . First host gives temporary error to second address;
4967 . Second host offers TLS and a TLS session is established;
4968 . Second host accepts second address.
4969 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4970 and peerdn, if requested) that were in fact used only for the second
4973 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4974 attention to any local part prefix or suffix that was matched by the
4975 router that accepted the address. It now behaves in the same way as it
4976 does for delivery: the affixes are removed from the local part unless
4977 rcpt_include_affixes is set on the transport.
4979 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4980 timeout during the DATA phase of an incoming message.
4982 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4983 applied a patch sanctioned by the Sieve maintainer.
4985 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4986 the uid or gid is negative. A case of a negative gid caused this to be
4987 noticed. The fix allows for either to be negative.
4989 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4990 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4993 PH/36 The change PH/12 above was broken. Fixed it.
4995 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4996 the grounds that routing the same address twice would always produce the
4997 same answer. This might have been true once, but it is certainly no
4998 longer true now. Routing a child address may depend on the previous
4999 routing that produced that child. Some complicated redirection strategies
5000 went wrong when messages had multiple recipients, and made Exim's
5001 behaviour dependent on the order in which the addresses were given.
5003 I have moved the duplicate checking until after the routing is complete.
5004 Exim scans the addresses that are assigned to local and remote
5005 transports, and removes any duplicates. This means that more work will be
5006 done, as duplicates will always all be routed, but duplicates are
5007 presumably rare, so I don't expect this is of any significance.
5009 For deliveries to pipes, files, and autoreplies, the duplicate checking
5010 still happens during the routing process, since they are not going to be
5013 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5014 It corrects a timeout issue with spamd. This is Ian's comment: "The
5015 background is that sometimes spamd either never reads data from a
5016 connection it has accepted, or it never writes response data. The exiscan
5017 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5018 blindly assumes that writes won't block so it may never time out."
5020 PH/39 Allow G after quota size as well as K and M.
5022 PH/40 The value set for $authenticated_id in an authenticator may not contain
5023 binary zeroes or newlines because the value is written to log lines and
5024 to spool files. There was no check on this. Now the value is run through
5025 the string_printing() function so that such characters are converted to
5026 printable escape sequences.
5028 PH/41 $message_linecount is a new variable that contains the total number of
5029 lines in the message. Compare $body_linecount, which is the count for the
5032 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5033 bounce and delay warning messages, except in certain special cases, which
5036 (a) An SMTP error message from a remote host;
5037 (b) A message specified in a :fail: redirection;
5038 (c) A message specified in a "fail" command in a system filter;
5039 (d) A message specified in a FAIL return from the queryprogram router;
5040 (e) A message specified by the cannot_route_message router option.
5042 In these cases only, Exim does include the error details in bounce and
5043 warning messages. There are also a few cases where bland messages such
5044 as "unrouteable address" or "local delivery error" are given.
5046 PH/43 $value is now also set for the "else" part of a ${run expansion.
5048 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5049 being worked on, but at least Exim now implements the latest version to
5052 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5053 process to complete was treated as a delivery failure, a timeout while
5054 writing the message to the pipe was logged, but erroneously treated as a
5055 successful delivery. Such timeouts include transport filter timeouts. For
5056 consistency with the overall process timeout, these timeouts are now
5057 treated as errors, giving rise to delivery failures by default. However,
5058 there is now a new Boolean option for the pipe transport called
5059 timeout_defer, which, if set TRUE, converts the failures into defers for
5060 both kinds of timeout. A transport filter timeout is now identified in
5063 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5064 systems where "make" and "gmake" are different, calling "gmake" at top
5065 level broke things. I've arranged for the value of $(MAKE) to be passed
5066 from the Makefile to this script so that it can call the same version of
5070 A note about Exim versions 4.44 and 4.50
5071 ----------------------------------------
5073 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5074 changes of various kinds. As a consequence, a big documentation update was
5075 needed. This delayed the release for rather longer than seemed good, especially
5076 in the light of a couple of (minor) security issues. Therefore, the changes
5077 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5078 release. So 4.44 and 4.50 are in effect two different branches that both start
5081 I have left the 4.50 change log unchanged; it contains all the changes since
5082 4.43. The change log for 4.44 is below; many of its items are identical to
5083 those for 4.50. This seems to be the most sensible way to preserve the
5084 historical information.
5090 1. Minor wording change to the doc/README.SIEVE file.
5092 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5093 computation of the current number of files was incorrect.
5095 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5096 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5099 4. Give more explanation in the error message when the command for a transport
5100 filter fails to execute.
5102 5. There are several places where Exim runs a non-Exim command in a
5103 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5104 was being done only for the command run by the queryprogram router. It is
5105 now done for all such subprocesses. The other cases are: ${run, transport
5106 filters, and the commands run by the lmtp and pipe transports.
5108 6. Added CONFIGURE_GROUP build-time option.
5110 7. Some older OS have a limit of 256 on the maximum number of file
5111 descriptors. Exim was using setrlimit() to set 1000 as a large value
5112 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5113 systems. I've change it so that if it can't get 1000, it tries for 256.
5115 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5116 was an oversight, and furthermore, ever since the addition of extra
5117 controls (e.g. 4.43/32), the checks on when to allow different forms of
5118 "control" were broken. There should now be diagnostics for all cases when a
5119 control that does not make sense is encountered.
5121 9. Added the /retain_sender option to "control=submission".
5123 10. $recipients is now available in the predata ACL (oversight).
5125 11. Tidy the search cache before the fork to do a delivery from a message
5126 received from the command line. Otherwise the child will trigger a lookup
5127 failure and thereby defer the delivery if it tries to use (for example) a
5128 cached ldap connection that the parent has called unbind on.
5130 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5131 of $address_data from the recipient verification was clobbered by the
5132 sender verification.
5134 13. The value of address_data from a sender verification is now available in
5135 $sender_address_data in subsequent conditions in the ACL statement.
5137 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5139 15. Added a new option "connect=<time>" to callout options, to set a different
5142 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5143 was its contents. (It was OK if the option was not defined at all.)
5145 17. A "Completed" log line is now written for messages that are removed from
5146 the spool by the -Mrm option.
5148 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5149 information about exactly what failed.
5151 19. Added -dd to debug only the daemon process.
5153 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5154 handles timeouts, both on the server side and network timeouts. Renamed the
5155 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5157 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5158 It is now set to "smtps".
5160 22. $host_address is now set to the target address during the checking of
5161 ignore_target_hosts.
5163 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5164 being passed; this would have caused $sender_host_name to have been used if
5165 matching the list had actually called for a host name (not very likely,
5166 since this list is usually IP addresses). A host name is now passed as
5169 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5170 code that specifies a non-restarting handler (typically sigaction() in
5171 modern systems) in an attempt to fix a rare and obscure crash bug.
5173 25. Narrowed the window for a race in the daemon that could cause it to ignore
5174 SIGCHLD signals. This is not a major problem, because they are used only to
5175 wake it up if nothing else does.
5177 26. A malformed maildirsize file could cause Exim to calculate negative values
5178 for the mailbox size or file count. Odd effects could occur as a result.
5179 The maildirsize information is now recalculated if the size or filecount
5182 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5183 support for a long time. Removed HAVE_SYS_VFS_H.
5185 28. Installed the latest version of exipick from John Jetmore.
5187 29. In an address list, if the pattern was not a regular expression, an empty
5188 subject address (from a bounce message) matched only if the pattern was an
5189 empty string. Non-empty patterns were not even tested. This was the wrong
5190 because it is perfectly reasonable to use an empty address as part of a
5191 database query. An empty address is now tested by patterns that are
5192 lookups. However, all the other forms of pattern expect the subject to
5193 contain a local part and a domain, and therefore, for them, an empty
5194 address still always fails if the pattern is not itself empty.
5196 30. Exim went into a mad DNS loop when attempting to do a callout where the
5197 host was specified on an smtp transport, and looking it up yielded more
5198 than one IP address.
5200 31. Re-factored the code for checking spool and log partition space into a
5201 function that finds that data and another that does the check. The former
5202 is then used to implement four new variables: $spool_space, $log_space,
5203 $spool_inodes, and $log_inodes.
5205 32. The RFC2047 encoding function was originally intended for short strings
5206 such as real names; it was not keeping to the 75-character limit for
5207 encoded words that the RFC imposes. It now respects the limit, and
5208 generates multiple encoded words if necessary. To be on the safe side, I
5209 have increased the buffer size for the ${rfc2047: expansion operator from
5212 33. It is now permitted to omit both strings after an "if" condition; if the
5213 condition is true, the result is "true". As before, when the second string
5214 is omitted, a false condition yields an empty string. This makes it less
5215 cumbersome to write custom ACL and router conditions.
5217 34. Failure to deliver a bounce message always caused it to be frozen, even if
5218 there was an errors_to setting on the router. The errors_to setting is now
5221 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5222 canonical form (fully expanded) before being placed in
5223 $sender_host_address.
5225 36. The table in the code that translates DNS record types into text (T_A to
5226 "A" for instance) was missing entries for NS and CNAME. It is just possible
5227 that this could have caused confusion if both these types were looked up
5228 for the same domain, because the text type is used as part of Exim's
5229 per-process caching. But the chance of anyone hitting this buglet seems
5232 37. The dnsdb lookup has been extended in a number of ways.
5234 (1) There is a new type, "zns", which walks up the domain tree until it
5235 finds some nameserver records. It should be used with care.
5237 (2) There is a new type, "mxh", which is like "mx" except that it returns
5238 just the host names, not the priorities.
5240 (3) It is now possible to give a list of domains (or IP addresses) to be
5241 looked up. The behaviour when one of the lookups defers can be
5242 controlled by a keyword.
5244 (4) It is now possible to specify the separator character for use when
5245 multiple records are returned.
5247 38. The dnslists ACL condition has been extended: it is now possible to supply
5248 a list of IP addresses and/or domains to be looked up in a particular DNS
5251 39. Added log_selector=+queue_time_overall.
5253 40. When running the queue in the test harness, wait just a tad after forking a
5254 delivery process, to get repeatability of debugging output.
5256 41. Include certificate and key file names in error message when GnuTLS fails
5257 to set them up, because the GnuTLS error message doesn't include the name
5258 of the failing file when there is a problem reading it.
5260 42. Allow both -bf and -bF in the same test run.
5262 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5264 44. The "Exiscan patch" is now merged into the mainline Exim source.
5266 45. Sometimes the final signoff response after QUIT could fail to get
5267 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5268 < 0 before doing a fflush(). This bug looks as though it goes back to the
5269 introduction of TLS in release 3.20, but "sometimes" must have been rare
5270 because the tests only now provoked it.
5272 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5273 (this can affect the format of dates).
5275 47. exim_tidydb, when checking for the continued existence of a message for
5276 which it has found a message-specific retry record, was not finding
5277 messages that were in split spool directories. Consequently, it was
5278 deleting retry records that should have stayed in existence.
5280 48. Steve fixed some bugs in eximstats.
5282 49. The SPA authentication driver was not abandoning authentication and moving
5283 on to the next authenticator when an expansion was forced to fail,
5284 contradicting the general specification for all authenticators. Instead it
5285 was generating a temporary error. It now behaves as specified.
5287 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5288 (the order specifies the preference for clients). The order is now AES256,
5289 AES128, 3DES, ARCFOUR128.
5291 51. Small patch to Sieve code - explicitly set From: when generating an
5294 52. Exim crashed if a remote delivery caused a very long error message to be
5295 recorded - for instance if somebody sent an entire SpamAssassin report back
5296 as a large number of 550 error lines. This bug was coincidentally fixed by
5297 increasing the size of one of Exim's internal buffers (big_buffer) that
5298 happened as part of the Exiscan merge. However, to be on the safe side, I
5299 have made the code more robust (and fixed the comments that describe what
5302 53. Now that there can be additional text after "Completed" in log lines (if
5303 the queue_time_overall log selector is set), a one-byte patch to exigrep
5304 was needed to allow it to recognize "Completed" as not the last thing in
5307 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5308 patch that reportedly fixes this has been added. I am not expert enough to
5309 create a test for it. This is what the patch creator wrote:
5311 "I found a little strange behaviour of ldap code when working with
5312 Windows 2003 AD Domain, where users was placed in more than one
5313 Organization Units. When I tried to give exim partial DN, the exit code
5314 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5315 But simultaneously result of request was absolutely normal ldap result,
5316 so I produce this patch..."
5318 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5319 REFERENCE, so I have modified the code to exclude the patch when that macro
5322 55. Some experimental protocols are using DNS PTR records for new purposes. The
5323 keys for these records are domain names, not reversed IP addresses. The
5324 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5325 leaves it alone. Component reversal etc. now happens only for IP addresses.
5328 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5330 57. Double the size of the debug message buffer (to 2048) so that more of very
5331 long debug lines gets shown.
5333 58. The exicyclog utility now does better if the number of log files to keep
5334 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5336 59. Two changes related to the smtp_active_hostname option:
5338 (1) $smtp_active_hostname is now available as a variable.
5339 (2) The default for smtp_banner uses $smtp_active_hostname instead
5340 of $primary_hostname.
5342 60. The host_aton() function is supposed to be passed a string that is known
5343 to be a valid IP address. However, in the case of IPv6 addresses, it was
5344 not checking this. This is a hostage to fortune. Exim now panics and dies
5345 if the condition is not met. A case was found where this could be provoked
5346 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5347 components; fortuitously, this particular loophole had already been fixed
5348 by change 4.50/55 above.
5350 If there are any other similar loopholes, the new check in host_aton()
5351 itself should stop them being exploited. The report I received stated that
5352 data on the command line could provoke the exploit when Exim was running as
5353 exim, but did not say which command line option was involved. All I could
5354 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5355 running as the user.
5358 61. There was a buffer overflow vulnerability in the SPA authentication code
5359 (which came originally from the Samba project). I have added a test to the
5360 spa_base64_to_bits() function which I hope fixes it.
5363 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5364 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5366 63. The daemon start-up calls getloadavg() while still root for those OS that
5367 need the first call to be done as root, but it missed one case: when
5368 deliver_queue_load_max is set with deliver_drop_privilege. This is
5369 necessary for the benefit of the queue runner, because there is no re-exec
5370 when deliver_drop_privilege is set.
5372 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5373 This has been fixed.
5375 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5376 was in use, was not putting the data itself into the right store pool;
5377 consequently, it could be overwritten for a subsequent message in the same
5378 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5381 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5383 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5384 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5385 the function were treating the return as a boolean value, which happened to
5386 work because 0=false and not-0=true, but is not correct code.
5388 68. The host_aton() function was not handling scoped IPv6 addresses (those
5389 with, for example, "%eth0" on the end) correctly.
5391 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5392 negated items (that is, ~something) in unsigned ints. Some compilers
5393 apparently mutter when there is no cast.
5395 70. If an address verification called from an ACL failed, and did not produce a
5396 user-specific message (i.e. there was only a "system" message), nothing was
5397 put in $acl_verify_message. In this situation, it now puts the system
5400 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5401 session; change 4.31/43 added the unwanted input to the log line - except
5402 that it did not do this in the start of session case. It now does.
5404 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5405 This is wrong and can cause the other end to generate a synchronization
5406 error if it is another Exim or anything else that does the synchronization
5407 check. A QUIT command is no longer sent after a timeout.
5409 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5410 during host lookups.
5412 74. The defer_ok option of callout verification was not working if it was used
5413 when verifying addresses in header lines, that is, for this case:
5415 verify = header_sender/callout=defer_ok
5417 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5418 those file descriptors could be used for SMTP connections. If anything
5419 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5420 could be sent to the SMTP client, causing chaos. The daemon now opens
5421 stdin, stdout, and stderr to /dev/null when it puts itself into the
5424 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5425 log by default. The user can override this with suitable Perl magic.
5427 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5428 the log message when discard triggers, was not working for the DATA ACL or
5429 for the non-SMTP ACL.
5431 78. Error message wording change in sieve.c.
5433 79. If smtp_accept_max_per_host was set, the number of connections could be
5434 restricted to fewer than expected, because the daemon was trying to set up
5435 a new connection before checking whether the processes handling previous
5436 connections had finished. The check for completed processes is now done
5437 earlier. On busy systems, this bug wouldn't be noticed because something
5438 else would have woken the daemon, and it would have reaped the completed
5441 80. If a message was submitted locally by a user whose login name contained one
5442 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5443 It caused a spool format error. I have fixed the spool reading code. A
5444 related problem was that the "from" clause in the Received: line became
5445 illegal because of the space(s). It is now covered by ${quote_local_part.
5447 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5450 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5452 83. Patch from Sieve maintainer to fix unterminated string problem in
5453 "vacation" handling.
5455 84. Some minor changes to the Linux configuration files to help with other
5456 OS variants using glibc.
5458 85. One more patch for Sieve to update vacation handling to latest spec.
5461 ----------------------------------------------------
5462 See the note above about the 4.44 and 4.50 releases.
5463 ----------------------------------------------------
5469 1. Change 4.43/35 introduced a bug that caused file counts to be
5470 incorrectly computed when quota_filecount was set in an appendfile
5473 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5474 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5477 3. Give more explanation in the error message when the command for a transport
5478 filter fails to execute.
5480 4. There are several places where Exim runs a non-Exim command in a
5481 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5482 was being done only for the command run by the queryprogram router. It is
5483 now done for all such subprocesses. The other cases are: ${run, transport
5484 filters, and the commands run by the lmtp and pipe transports.
5486 5. Some older OS have a limit of 256 on the maximum number of file
5487 descriptors. Exim was using setrlimit() to set 1000 as a large value
5488 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5489 systems. I've change it so that if it can't get 1000, it tries for 256.
5491 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5492 was an oversight, and furthermore, ever since the addition of extra
5493 controls (e.g. 4.43/32), the checks on when to allow different forms of
5494 "control" were broken. There should now be diagnostics for all cases when a
5495 control that does not make sense is encountered.
5497 7. $recipients is now available in the predata ACL (oversight).
5499 8. Tidy the search cache before the fork to do a delivery from a message
5500 received from the command line. Otherwise the child will trigger a lookup
5501 failure and thereby defer the delivery if it tries to use (for example) a
5502 cached ldap connection that the parent has called unbind on.
5504 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5505 of $address_data from the recipient verification was clobbered by the
5506 sender verification.
5508 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5509 was its contents. (It was OK if the option was not defined at all.)
5511 11. A "Completed" log line is now written for messages that are removed from
5512 the spool by the -Mrm option.
5514 12. $host_address is now set to the target address during the checking of
5515 ignore_target_hosts.
5517 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5518 being passed; this would have caused $sender_host_name to have been used if
5519 matching the list had actually called for a host name (not very likely,
5520 since this list is usually IP addresses). A host name is now passed as
5523 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5524 code that specifies a non-restarting handler (typically sigaction() in
5525 modern systems) in an attempt to fix a rare and obscure crash bug.
5527 15. Narrowed the window for a race in the daemon that could cause it to ignore
5528 SIGCHLD signals. This is not a major problem, because they are used only to
5529 wake it up if nothing else does.
5531 16. A malformed maildirsize file could cause Exim to calculate negative values
5532 for the mailbox size or file count. Odd effects could occur as a result.
5533 The maildirsize information is now recalculated if the size or filecount
5536 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5537 support for a long time. Removed HAVE_SYS_VFS_H.
5539 18. Updated exipick to current release from John Jetmore.
5541 19. Allow an empty sender to be matched against a lookup in an address list.
5542 Previously the only cases considered were a regular expression, or an
5545 20. Exim went into a mad DNS lookup loop when doing a callout where the
5546 host was specified on the transport, if the DNS lookup yielded more than
5549 21. The RFC2047 encoding function was originally intended for short strings
5550 such as real names; it was not keeping to the 75-character limit for
5551 encoded words that the RFC imposes. It now respects the limit, and
5552 generates multiple encoded words if necessary. To be on the safe side, I
5553 have increased the buffer size for the ${rfc2047: expansion operator from
5556 22. Failure to deliver a bounce message always caused it to be frozen, even if
5557 there was an errors_to setting on the router. The errors_to setting is now
5560 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5561 canonical form (fully expanded) before being placed in
5562 $sender_host_address.
5564 24. Updated eximstats to version 1.33
5566 25. Include certificate and key file names in error message when GnuTLS fails
5567 to set them up, because the GnuTLS error message doesn't include the name
5568 of the failing file when there is a problem reading it.
5570 26. Expand error message when OpenSSL has problems setting up cert/key files.
5573 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5574 (this can affect the format of dates).
5576 28. exim_tidydb, when checking for the continued existence of a message for
5577 which it has found a message-specific retry record, was not finding
5578 messages that were in split spool directories. Consequently, it was
5579 deleting retry records that should have stayed in existence.
5581 29. eximstats updated to version 1.35
5582 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5583 1.35 - bugfix such that pie charts by volume are generated correctly
5585 30. The SPA authentication driver was not abandoning authentication and moving
5586 on to the next authenticator when an expansion was forced to fail,
5587 contradicting the general specification for all authenticators. Instead it
5588 was generating a temporary error. It now behaves as specified.
5590 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5591 (the order specifies the preference for clients). The order is now AES256,
5592 AES128, 3DES, ARCFOUR128.
5594 31. Small patch to Sieve code - explicitly set From: when generating an
5597 32. Exim crashed if a remote delivery caused a very long error message to be
5598 recorded - for instance if somebody sent an entire SpamAssassin report back
5599 as a large number of 550 error lines. This bug was coincidentally fixed by
5600 increasing the size of one of Exim's internal buffers (big_buffer) that
5601 happened as part of the Exiscan merge. However, to be on the safe side, I
5602 have made the code more robust (and fixed the comments that describe what
5605 33. Some experimental protocols are using DNS PTR records for new purposes. The
5606 keys for these records are domain names, not reversed IP addresses. The
5607 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5608 leaves it alone. Component reversal etc. now happens only for IP addresses.
5611 34. The host_aton() function is supposed to be passed a string that is known
5612 to be a valid IP address. However, in the case of IPv6 addresses, it was
5613 not checking this. This is a hostage to fortune. Exim now panics and dies
5614 if the condition is not met. A case was found where this could be provoked
5615 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5616 components; fortuitously, this particular loophole had already been fixed
5617 by change 4.50/55 or 4.44/33 above.
5619 If there are any other similar loopholes, the new check in host_aton()
5620 itself should stop them being exploited. The report I received stated that
5621 data on the command line could provoke the exploit when Exim was running as
5622 exim, but did not say which command line option was involved. All I could
5623 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5624 running as the user.
5627 35. There was a buffer overflow vulnerability in the SPA authentication code
5628 (which came originally from the Samba project). I have added a test to the
5629 spa_base64_to_bits() function which I hope fixes it.
5632 36. The daemon start-up calls getloadavg() while still root for those OS that
5633 need the first call to be done as root, but it missed one case: when
5634 deliver_queue_load_max is set with deliver_drop_privilege. This is
5635 necessary for the benefit of the queue runner, because there is no re-exec
5636 when deliver_drop_privilege is set.
5638 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5639 was in use, was not putting the data itself into the right store pool;
5640 consequently, it could be overwritten for a subsequent message in the same
5641 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5644 38. Sometimes the final signoff response after QUIT could fail to get
5645 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5646 < 0 before doing a fflush(). This bug looks as though it goes back to the
5647 introduction of TLS in release 3.20, but "sometimes" must have been rare
5648 because the tests only now provoked it.
5654 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5655 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5656 Now it returns an integer. A number of calls were still expecting a T/F
5657 return. Fortuitously, in all cases, the tests worked in OK situations,
5658 which is the norm. However, things would have gone wrong on any write
5659 failures on the smtp file descriptor. This function is used when sending
5660 messages over SMTP and also when doing verify callouts.
5662 2. When Exim is called to do synchronous delivery of a locally submitted
5663 message (the -odf or -odi options), it no longer closes stderr before doing
5666 3. Implemented the mua_wrapper option.
5668 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5670 5. Implemented the functions header_remove(), header_testname(),
5671 header_add_at_position(), and receive_remove_recipient(), and exported them
5674 6. If an ACL "warn" statement specified the addition of headers, Exim already
5675 inserted X-ACL-Warn: at the start if there was no header name. However, it
5676 was not making this test for the second and subsequent header lines if
5677 there were newlines in the string. This meant that an invalid header could
5678 be inserted if Exim was badly configured.
5680 7. Allow an ACL "warn" statement to add header lines at the start or after all
5681 the Received: headers, as well as at the end.
5683 8. Added the rcpt_4xx retry error code.
5685 9. Added postmaster_mailfrom=xxx to callout verification option.
5687 10. Added mailfrom=xxxx to the callout verification option, for verify=
5690 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5691 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5693 12. Inserted some casts to stop certain compilers warning when using pointer
5694 differences as field lengths or precisions in printf-type calls (mostly
5695 affecting debugging statements).
5697 13. Added optional readline() support for -be (dynamically loaded).
5699 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5700 same clock tick as a message's arrival, so that its received time was the
5701 same as the "first fail" time on the retry record, and that message
5702 remained on the queue past the ultimate address timeout, every queue runner
5703 would try a delivery (because it was past the ultimate address timeout) but
5704 after another failure, the ultimate address timeout, which should have then
5705 bounced the address, did not kick in. This was a "< instead of <=" error;
5706 in most cases the first failure would have been in the next clock tick
5707 after the received time, and all would be well.
5709 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5710 being recognized when the domain list was tested by the match_domain
5711 condition in an expansion string.
5713 16. Added the ${str2b64: operator.
5715 17. Exim was always calling setrlimit() to set a large limit for the number of
5716 processes, without checking whether the existing limit was already
5717 adequate. (It did check for the limit on file descriptors.) Furthermore,
5718 errors from getrlimit() and setrlimit() were being ignored. Now they are
5719 logged to the main and panic logs, but Exim does carry on, to try to do its
5720 job under whatever limits there are.
5722 18. Imported PCRE 5.0.
5724 19. Trivial typo in log message " temporarily refused connection" (the leading
5727 20. If the log selector return_path_on_delivery was set and an address was
5728 redirected to /dev/null, the delivery process crashed because it assumed
5729 that a return path would always be set for a "successful" delivery. In this
5730 case, the whole delivery is bypassed as an optimization, and therefore no
5733 21. Internal re-arrangement: the function for sending a challenge and reading
5734 a response while authentication was assuming a zero-terminated challenge
5735 string. It's now changed to take a pointer and a length, to allow for
5736 binary data in such strings.
5738 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5740 23. Exim was not respecting finduser_retries when seeking the login of the
5741 uid under which it was called; it was always trying 10 times. (The default
5742 setting of finduser_retries is zero.) Also, it was sleeping after the final
5743 failure, which is pointless.
5745 24. Implemented tls_on_connect_ports.
5747 25. Implemented acl_smtp_predata.
5749 26. If the domain in control=submission is set empty, Exim assumes that the
5750 authenticated id is a complete email address when it generates From: or
5751 Sender: header lines.
5753 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5754 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5755 chown and chgrp in /bin and hostname in /usr/bin.
5757 28. Exim was keeping the "process log" file open after each use, just as it
5758 does for the main log. This opens the possibility of it remaining open for
5759 long periods when the USR1 signal hits a daemon. Occasional processlog
5760 errors were reported, that could have been caused by this. Anyway, it seems
5761 much more sensible not to leave this file open at all, so that is what now
5764 29. The long-running daemon process does not normally write to the log once it
5765 has entered its main loop, and it closes the log before doing so. This is
5766 so that log files can straightforwardly be renamed and moved. However,
5767 there are a couple of unusual error situations where the daemon does write
5768 log entries, and I had neglected to close the log afterwards.
5770 30. The text of an SMTP error response that was received during a remote
5771 delivery was being truncated at 512 bytes. This is too short for some of
5772 the long messages that one sometimes sees. I've increased the limit to
5775 31. It is now possible to make retry rules that apply only when a message has a
5776 specific sender, in particular, an empty sender.
5778 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5779 it possible to be selective about when SMTP synchronization is enforced.
5781 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5783 32. Implemented hosts_connection_nolog.
5785 33. Added an ACL for QUIT.
5787 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5790 35. Added mailbox_size and mailbox_filecount to appendfile.
5792 36. Added control = no_multiline_responses to ACLs.
5794 37. There was a bug in the logic of the code that waits for the clock to tick
5795 in the case where the clock went backwards by a substantial amount such
5796 that the microsecond fraction of "now" was more than the microsecond
5797 fraction of "then" (but the whole seconds number was less).
5799 38. Added support for the libradius Radius client library this is found on
5800 FreeBSD (previously only the radiusclient library was supported).
5806 1. When certain lookups returned multiple values in the form name=value, the
5807 quoting of the values was not always being done properly. Specifically:
5808 (a) If the value started with a double quote, but contained no whitespace,
5810 (b) If the value contained whitespace other than a space character (i.e.
5811 tabs or newlines or carriage returns) it was not quoted.
5812 This fix has been applied to the mysql and pgsql lookups by writing a
5813 separate quoting function and calling it from the lookup code. The fix
5814 should probably also be applied to nisplus, ibase and oracle lookups, but
5815 since I cannot test any of those, I have not disturbed their existing code.
5817 2. A hit in the callout cache for a specific address caused a log line with no
5818 reason for rejecting RCPT. Now it says "Previous (cached) callout
5819 verification failure".
5821 3. There was an off-by-one bug in the queryprogram router. An over-long
5822 return line was truncated at 256 instead of 255 characters, thereby
5823 overflowing its buffer with the terminating zero. As well as fixing this, I
5824 have increased the buffer size to 1024 (and made a note to document this).
5826 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5827 when Exim is waiting for an SMTP response from a remote server, Exim
5828 restarts its select() call on the socket, thereby resetting its timeout.
5829 This is not a problem when such interrupts are rare. Somebody set up a cron
5830 job to run exiwhat every 2 minutes, which is less than the normal select()
5831 timeout (5 or 10 minutes). This meant that the select() timeout never
5832 kicked in because it was always reset. I have fixed this by comparing the
5833 time when an interrupt arrives with the time at the start of the first call
5834 to select(). If more time than the timeout has elapsed, the interrupt is
5835 treated as a timeout.
5837 5. Some internal re-factoring in preparation for the addition of Sieve
5838 extensions (by MH). In particular, the "personal" test is moved to a
5839 separate function, and given an option for scanning Cc: and Bcc: (which is
5840 not set for Exim filters).
5842 6. When Exim created an email address using the login of the caller as the
5843 local part (e.g. when creating a From: or Sender: header line), it was not
5844 quoting the local part when it contained special characters such as @.
5846 7. Installed new OpenBSD configuration files.
5848 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5849 try to make them clearer.
5851 9. Callout options, other than the timeout value, were being ignored when
5852 verifying sender addresses in header lines. For example, when using
5854 verify = header_sender/callout=no_cache
5856 the cache was (incorrectly) being used.
5858 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5859 only the Cygwin environment.
5861 11. When return_path_on_delivery was set as a log selector, if different remote
5862 addresses in the same message used different return paths and parallel
5863 remote delivery occurred, the wrong values would sometimes be logged.
5864 (Whenever a remote delivery process finished, the return path value from
5865 the most recently started remote delivery process was logged.)
5867 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5868 lines when AUTH and/or TLS are in use. This is the "received protocol"
5869 field. Exim used to use "asmtp" for authenticated SMTP, without any
5870 indication (in the protocol name) for TLS use. Now it follows the RFC and
5871 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5872 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5873 names appear in log lines as well as in Received: header lines.
5875 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5876 extensions, and comparison tests, and to fix some bugs.
5878 14. Changes to the "personal" filter test:
5880 (1) The test was buggy in that it was just doing the equivalent of
5881 "contains" tests on header lines. For example, if a user's address was
5882 anne@some.where, the "personal" test would incorrectly be true for
5884 To: susanne@some.where
5886 This test is now done by extracting each address from the header in turn,
5887 and checking the entire address. Other tests that are part of "personal"
5888 are now done using regular expressions (for example, to check local parts
5889 of addresses in From: header lines).
5891 (2) The list of non-personal local parts in From: addresses has been
5892 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5893 taken from the Sieve specification recommendations.
5895 (3) If the message contains any header line starting with "List-" it is
5896 treated as non-personal.
5898 (4) The test for "circular" in the Subject: header line has been removed
5899 because it now seems ill-conceived.
5901 15. Minor typos in src/EDITME comments corrected.
5903 16. Installed latest exipick from John Jetmore.
5905 17. If headers_add on a router specified a text string that was too long for
5906 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5907 of string_sprintf() is now avoided.
5909 18. $message_body_size was not set (it was always zero) when running the DATA
5910 ACL and the local_scan() function.
5912 19. For the "mail" command in an Exim filter, no default was being set for
5913 the once_repeat time, causing a random time value to be used if "once" was
5914 specified. (If the value happened to be <= 0, no repeat happened.) The
5915 default is now 0s, meaning "never repeat". The "vacation" command was OK
5916 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5917 (I found it when inspecting the code).
5919 20. There is now an overall timeout for performing a callout verification. It
5920 defaults to 4 times the callout timeout, which applies to individual SMTP
5921 commands during the callout. The overall timeout applies when there is more
5922 than one host that can be tried. The timeout is checked before trying the
5923 next host. This prevents very long delays if there are a large number of
5924 hosts and all are timing out (e.g. when the network connections are timing
5925 out). The value of the overall timeout can be changed by specifying an
5926 additional sub-option for "callout", called "maxwait". For example:
5928 verify = sender/callout=5s,maxwait=20s
5930 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5931 to the end before writing, but this should make it even safer).
5933 22. Exim was forgetting that it had advertised PIPELINING for the second and
5934 subsequent messages on an SMTP connection. It was also not resetting its
5935 memory on STARTTLS and an internal HELO.
5937 23. When Exim logs an SMTP synchronization error within a session, it now
5938 records whether PIPELINING has been advertised or not.
5940 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5941 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5942 rather than long int.
5944 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5946 26. Added the never_mail option to autoreply.
5952 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5953 crash if the getsockname() call failed; this can happen if a connection is
5954 closed very soon after it is established. The problem was simply in the
5955 order in which certain operations were done, causing Exim to try to write
5956 to the SMTP stream before it had set up the file descriptor. The bug has
5957 been fixed by making things happen in the correct order.
5963 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5964 before the connection was closed, thus losing the rejection response.
5966 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5967 some early Solaris releases, but causes trouble in current releases where
5968 socklen_t is defined.
5970 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5973 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5976 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5977 that releasing the top of it at the end releases what was used for sub-
5978 expansions (unless the block got too big). However, discard this block if
5979 the first thing is a variable or header, so that we can use its block when
5980 it is dynamic (useful for very large $message_headers, for example).
5982 6. Lookups now cache *every* query, not just the most recent. A new, separate
5983 store pool is used for this. It can be recovered when all lookup caches are
5984 flushed. Lookups now release memory at the end of their result strings.
5985 This has involved some general refactoring of the lookup sources.
5987 7. Some code has been added to the store_xxx() functions to reduce the amount
5988 of flapping under certain conditions.
5990 8. log_incoming_interface used to affect only the <= reception log lines. Now
5991 it causes the local interface and port to be added to several more SMTP log
5992 lines, for example "SMTP connection from", and rejection lines.
5994 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5996 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5998 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5999 could be overwritten at the end of the current message (or the start of a
6000 new message if it was set in a HELO ACL). The value is now preserved for
6001 the duration of the SMTP connection.
6003 12. If a transport had a headers_rewrite setting, and a matching header line
6004 contained an unqualified address, that address was qualified, even if it
6005 did not match any rewriting rules. The underlying bug was that the values
6006 of the flags that permit the existence of unqualified sender and recipient
6007 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6008 non-local messages, and by -bnq for local messages) were not being
6009 preserved with the message after it was received.
6011 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6012 "next input=" as part of the text comprising the host identity instead of
6013 the correct text. The code was using the same buffer for two different
6014 strings. However, depending on which order the printing function evaluated
6015 its arguments, the bug did not always show up. Under Linux, for example, my
6016 test suite worked just fine.
6018 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6019 doesn't work with some older versions of Perl. It has been changed to "my",
6020 which in any case is probably the better facility to use.
6022 15. A really picky compiler found some instances of statements for creating
6023 error messages that either had too many or two few arguments for the format
6026 16. The size of the buffer for calls to the DNS resolver has been increased
6027 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6028 for addresses that have a lot of PTR records. This alleviates a problem; it
6029 does not fully solve it.
6031 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6032 buffer now truncates the list and logs the incident, which is the same
6033 action as happens when Exim is looking up a host name and its aliases.
6034 Previously in this situation something unpredictable would happen;
6035 sometimes it was "internal error: store_reset failed".
6037 18. If a server dropped the connection unexpectedly when an Exim client was
6038 using GnuTLS and trying to read a response, the client delivery process
6039 crashed while trying to generate an error log message.
6041 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6042 string, for example:
6044 warn message = H1: something\nH2: something
6046 the text was added as a single header line from Exim's point of view
6047 though it ended up OK in the delivered message. However, searching for the
6048 second and subsequent header lines using $h_h2: did not work. This has been
6049 fixed. Similarly, if a system filter added multiple headers in this way,
6050 the routers could not see them.
6052 20. Expanded the error message when iplsearch is called with an invalid key to
6053 suggest using net-iplsearch in a host list.
6055 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6056 ACLs are no longer actually imposed (and a message to that effect is
6059 22. If a "gecos" field in a passwd entry contained escaped characters, in
6060 particular, if it contained a \" sequence, Exim got it wrong when building
6061 a From: or a Sender: header from that name. A second bug also caused
6062 incorrect handling when an unquoted " was present following a character
6063 that needed quoting.
6065 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6066 was not being matched caselessly.
6068 24. Arranged for all hyphens in the exim.8 source to be escaped with
6071 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6072 properly. Recipient callout cache records were still being keyed to include
6073 the sender, even when use_sender was set false. This led to far more
6074 callouts that were necessary. The sender is no longer included in the key
6075 when use_sender is false.
6077 26. Added "control = submission" modifier to ACLs.
6079 27. Added the ${base62d: operator to decode base 62 numbers.
6081 28. dnsdb lookups can now access SRV records.
6083 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6084 the configuration file.
6086 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6087 (-v) mode. This makes the output for a verbose queue run more intelligible.
6089 31. Added a use_postmaster feature to recipient callouts.
6091 32. Added the $body_zerocount variable, containing the number of binary zero
6092 bytes in the message body.
6094 33. The time of last modification of the "new" subdirectory is now used as the
6095 "mailbox time last read" when there is a quota error for a maildir
6098 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6100 35. Added +ignore_unknown as a special item in host lists.
6102 36. Code for decoding IPv6 addresses in host lists is now included, even if
6103 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6104 address was recognized as an IP address, but was then not correctly decoded
6105 into binary, causing unexpected and incorrect effects when compared with
6112 1. Very minor rewording of debugging text in manualroute to say "list of
6113 hosts" instead of "hostlist".
6115 2. If verify=header_syntax was set, and a header line with an unqualified
6116 address (no domain) and a large number of spaces between the end of the
6117 name and the colon was received, the reception process suffered a buffer
6118 overflow, and (when I tested it) crashed. This was caused by some obsolete
6119 code that should have been removed. The fix is to remove it!
6121 3. When running in the test harness, delay a bit after writing a bounce
6122 message to get a bit more predictability in the log output.
6124 4. Added a call to search_tidyup() just before forking a reception process. In
6125 theory, someone could use a lookup in the expansion of smtp_accept_max_
6126 per_host which, without the tidyup, could leave open a database connection.
6128 5. Added the variables $recipient_data and $sender_data which get set from a
6129 lookup success in an ACL "recipients" or "senders" condition, or a router
6130 "senders" option, similar to $domain_data and $local_part_data.
6132 6. Moved the writing of debug_print from before to after the "senders" test
6135 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6136 problems for message scanning, either using a data ACL, or using
6137 local_scan() because the Received: header was not generated till after they
6138 were called (in order to set the time as the time of reception completion).
6139 I have revised the way this works. The header is now generated after the
6140 body is received, but before the ACL or local_scan() are called. After they
6141 are run, the timestamp in the header is updated.
6147 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6148 before starting a queue runner without re-exec. This happened only when
6149 deliver_drop_privilege was set or when the Exim user was set to root. The
6150 effect of the bug was that timeouts during subsequent deliveries caused
6151 crashes instead of being properly handled. The handler is now left at its
6152 default (and expected) setting.
6154 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6155 message, again when deliver_drop_privilege is set or Exim is run as root.
6156 The bug described in (1) was not present in this case, but the tidying up
6157 of the other signals was missing. I have made the two cases consistent.
6159 3. The ignore_target_hosts setting on a manualroute router was being ignored
6160 for hosts that were looked up using the /MX notation.
6162 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6165 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6166 operated on the sender address. After changing the $sender_address to <>
6167 for the sender address verify, Exim was re-instated it as the original
6168 (before rewriting) address, but remembering that it had rewritten it, so it
6169 wasn't rewriting it again. This bug also had the effect of breaking the
6170 sender address verification caching when the sender address was rewritten.
6172 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6173 This has been changed so that if the ip literal address matches
6174 ignore_target_hosts, the router declines.
6176 7. Added expansion conditions match_domain, match_address, and match_local_
6177 part (NOT match_host).
6179 8. The placeholder for the Received: header didn't have a length field set.
6181 9. Added code to Exim itself and to exim_lock to test for a specific race
6182 condition that could lead to file corruption when using MBX delivery. The
6183 issue is with the lockfile that is created in /tmp. If this file is removed
6184 after a process has opened it but before that process has acquired a lock,
6185 there is the potential for a second process to recreate the file and also
6186 acquire a lock. This could lead to two Exim processes writing to the file
6187 at the same time. The added code performs the same test as UW imapd; it
6188 checks after acquiring the lock that its file descriptor still refers to
6189 the same named file.
6191 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6192 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6195 11. Added the smtp_active_hostname option. If used, this will typically be made
6196 to depend on the incoming interface address. Because $interface_address is
6197 not set up until the daemon has forked a reception process, error responses
6198 that can happen earlier (such as "too many connections") no longer contain
6201 12. If an expansion in a condition on a "warn" statement fails because a lookup
6202 defers, the "warn" statement is abandoned, and the next ACL statement is
6203 processed. Previously this caused the whole ACL to be aborted.
6205 13. Added the iplsearch lookup type.
6207 14. Added ident_timeout as a log selector.
6209 15. Added tls_certificate_verified as a log selector.
6211 16. Added a global option tls_require_ciphers (compare the smtp transport
6212 option of the same name). This controls incoming TLS connections.
6214 17. I finally figured out how to make tls_require_ciphers do a similar thing
6215 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6216 before starting the TLS session.
6218 18. Tabs are now shown as \t in -bP output.
6220 19. If the log selector return_path_on_delivery was set, Exim crashed when
6221 bouncing a message because it had too many Received: header lines.
6223 20. If two routers both had headers_remove settings, and the first one included
6224 a superfluous trailing colon, the final name in the first list and the
6225 first name in the second list were incorrectly joined into one item (with a
6226 colon in the middle).
6232 1. Added -C and -D options to the exinext utility, mainly to make it easier
6233 to include in the automated testing, but these could be helpful when
6234 multiple configurations are in use.
6236 2. The exinext utility was not formatting the output nicely when there was
6237 an alternate port involved in the retry record key, nor when there was a
6238 message id as well (for retries that were specific to a specific message
6239 and a specific host). It was also confused by IPv6 addresses, because of
6240 the additional colons they contain. I have fixed the IPv4 problem, and
6241 patched it up to do a reasonable job for IPv6.
6243 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6244 delivery, the log line now contains "pipelined" if PIPELINING was used.
6246 4. An SMTP transport process used to panic and die if the bind() call to set
6247 an explicit outgoing interface failed. This has been changed; it is now
6248 treated in the same way as a connect() failure.
6250 5. A reference to $sender_host_name in the part of a conditional expansion
6251 that was being skipped was still causing a DNS lookup. This no longer
6254 6. The def: expansion condition was not recognizing references to header lines
6255 that used bh_ and bheader_.
6257 7. Added the _cache feature to named lists.
6259 8. The code for checking quota_filecount in the appendfile transport was
6260 allowing one more file than it should have been.
6262 9. For compatibility with Sendmail, the command line option
6270 and sets the incoming protocol and host name (for trusted callers). The
6271 host name and its colon can be omitted when only the protocol is to be set.
6272 Note the Exim already has two private options, -pd and -ps, that refer to
6273 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6274 "s", but I don't think that's a major issue.
6276 10. A number of refactoring changes to the code, none of which should affect
6279 (a) The number of logging options was getting close to filling up the
6280 32-bit word that was used as a bit map. I have split them into two classes:
6281 those that are passed in the argument to log_write(), and those that are
6282 only ever tested independently outside of that function. These are now in
6283 separate 32-bit words, so there is plenty of room for expansion again.
6284 There is no change in the user interface or the logging behaviour.
6286 (b) When building, for example, log lines, the code previously used a
6287 macro that called string_cat() twice, in order to add two strings. This is
6288 not really sufficiently general. Furthermore, there was one instance where
6289 it was actually wrong because one of the argument was used twice, and in
6290 one call a function was used. (As it happened, calling the function twice
6291 did not affect the overall behaviour.) The macro has been replaced by a
6292 function that can join an arbitrary number of extra strings onto a growing
6295 (c) The code for expansion conditions now uses a table and a binary chop
6296 instead of a serial search (which was left over from when there were very
6297 few conditions). Also, it now recognizes conditions like "pam" even when
6298 the relevant support is not compiled in: a suitably worded error message is
6299 given if an attempt is made to use such a condition.
6301 11. Added ${time_interval:xxxxx}.
6303 12. A bug was causing one of the ddress fields not to be passed back correctly
6304 from remote delivery subprocesses. The field in question was not being
6305 subsequently used, so this caused to problems in practice.
6307 13. Added new log selectors queue_time and deliver_time.
6309 14. Might have fixed a bug in maildirsizefile handling that threw up
6310 "unexpected character" debug warnings, and recalculated the data
6311 unnecessarily. In any case, I expanded the warning message to give more
6314 15. Added the message "Restricted characters in address" to the statements in
6315 the default ACL that block characters like @ and % in local parts.
6317 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6318 Three changes have been made:
6320 (a) There was a serious bug; a negative response to MAIL caused the whole
6321 recipient domain to be cached as invalid, thereby blocking all messages
6322 to all local parts at the same domain, from all senders. This bug has
6323 been fixed. The domain is no longer cached after a negative response to
6324 MAIL if the sender used is not empty.
6326 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6329 (c) A new callout option, "use_sender" has been added for people who want
6330 the modified behaviour.
6336 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6339 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6340 indeed breaks things for older releases.
6342 3. Added additional logging to the case where there is a problem reading data
6343 from a filter that is running in a subprocess using a pipe, in order to
6344 try to track down a specific problem.
6346 4. Testing facility fudge: when running in the test harness and attempting
6347 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6348 getting "No route to host". Convert this to a timeout.
6350 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6353 6. Some OS don't have socklen_t but use size_t instead. This affects the
6354 fifth argument of getsockopt() amongst other things. This is now
6355 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6356 can be set for individual OS. I have set it for SunOS5, OSF1, and
6357 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6358 some earlier ones do not.
6360 7. Change 4.30/15 was not doing the test caselessly.
6362 8. The standard form for an IPv6 address literal was being rejected by address
6363 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6364 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6365 this, as well as the form without the "IPv6" on the front (but only when
6366 address literals are enabled, of course).
6368 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6370 10. Exim crashed if a message with an empty sender address specified by -f
6371 encountered a router with an errors_to setting. This could be provoked only
6372 by a command such as
6376 where an empty string was supplied; "<>" did not hit this bug.
6378 11. Installed PCRE release 4.5.
6380 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6381 remained set. It is now erased.
6383 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6384 times from message ids (which are base 36 rather than the normal 62).
6386 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6387 were being counted as actual protocol errors, and logged if the log
6388 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6389 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6390 and DATA following a set of rejected RCPTs do not count as protocol errors.
6391 In other words, Exim assumes they were pipelined, though this may not
6392 actually be the case. Of course, in all cases the client gets an
6393 appropriate error code.
6395 15. If a lookup fails in an ACL condition, a message about the failure may
6396 be available; it is used if testing the ACL cannot continue, because most
6397 such messages specify what the cause of the deferral is. However, some
6398 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6399 that caused an old message to be retained and used if a later statement
6400 caused a defer, replacing the real cause of the deferral.
6402 16. If an IP address had so many PTR records that the DNS lookup buffer
6403 was not large enough to hold them, Exim could crash while trying to process
6404 the truncated data. It now detects and logs this case.
6406 17. Further to 4.21/58, another change has been made: if (and only if) the
6407 first line of a message (the first header line) ends with CRLF, a bare LF
6408 in a subsequent header line has a space inserted after it, so as not to
6409 terminate the header.
6411 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6412 unnecessarily, used atoi() instead of strtol(), and didn't check the
6413 termination when getting file sizes from file names by regex.
6415 19. Completely re-implemented the support for maildirsize files, in the light
6416 of a number of problems with the previous contributed implementation
6417 (4.30/29). In particular:
6419 . If the quota is zero, the maildirsize file is maintained, but no quota is
6422 . If the maildir directory does not exist, it is created before any attempt
6423 to write a maildirsize file.
6425 . The quota value in the file is just a cache; if the quota is changed in
6426 the transport, the new value overrides.
6428 . A regular expression is available for excluding directories from the
6431 20. The autoreply transport checks the characters in options that define the
6432 message's headers; it allows continued headers, but it was checking with
6433 isspace() after an embedded newline instead of explicitly looking for a
6436 21. If all the "regular" hosts to which an address was routed had passed their
6437 expiry times, and had not reached their retry times, the address was
6438 bounced, even if fallback hosts were defined. Now Exim should go on to try
6441 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6442 equivalent code in the SMTP transport. Some hosts send humungous responses
6443 to HELO/EHLO, more than 1024 it seems.
6445 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6446 gives compiler warnings in some environments. I've now done it "properly",
6449 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6450 (because of problems with the built-in one) was declared to return uschar *
6451 instead of char *, causing compiler failure.
6453 25. Fixed a file descriptor leak when processing alias/forward files.
6455 26. Fixed a minor format string issue in dbfn.c.
6457 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6459 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6460 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6463 29. When a sender address is verified, it is cached, to save repeating the test
6464 when there is more than one recipient in a message. However, when the
6465 verification involves a callout, it is possible for different callout
6466 options to be set for different recipients. It is too complicated to keep
6467 track of this in the cache, so now Exim always runs a verification when a
6468 callout is required, relying on the callout cache for the optimization.
6469 The overhead is duplication of the address routing, but this should not be
6472 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6473 to be verified with callout=postmaster, and the main callout worked but the
6474 postmaster check failed, the verification correctly failed. However, if a
6475 subsequent RCPT command asked for sender verification *without* the
6476 postmaster check, incorrect caching caused this verification also to fail,
6479 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6480 it was not caching the DNS options (qualify_single, search_parents) that
6481 were used when the lookup failed. A subsequent lookup with different
6482 options therefore always gave the same answer, though there were cases
6483 where it should not have. (Example: a "domains = !$mx_any" option on a
6484 dnslookup router: the "domains" option is always processed without any
6485 widening, but the router might have qualify_single set.) Now Exim uses the
6486 cached value only when the same options are set.
6488 32. Added John Jetmore's "exipick" utility to the distribution.
6490 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6491 than a timeout (e.g. a certificate is required, and is not provided), an
6492 Exim server now closes the connection immediately. Previously it waited for
6493 the client to close - but if the client is SSL, it seems that they each
6494 wait for each other, leading to a delay before one of them times out.
6496 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6497 maintained 0.8.x compatibility because I don't think many are using it, and
6498 it is clearly obsolete.
6500 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6503 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6504 client certificate was expired. A simple patch fixes this, though I don't
6505 understand the full logic of why the verify callback is called multiple
6508 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6509 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6510 which causes problems with some clients (such as the Certicom SSL Plus
6511 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6512 disables the coutermeasure allowing Eudora to connect."
6514 38. Exim was not checking that a write() to a log file succeeded. This could
6515 lead to Bad Things if a log got too big, in particular if it hit a file
6516 size limit. Exim now panics and dies if it cannot write to a log file, just
6517 as it does if it cannot open a log file.
6519 39. Modified OS/Makefile-Linux so that it now contains
6521 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6523 The two -D definitions ensure that Exim is compiled with large file
6524 support, which makes it possible to handle log files that are bigger than
6527 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6528 instance) a domain was checked against a named list that involved a lookup,
6529 causing $domain_data to be set, then another domain was checked against the
6530 same list, then the first domain was re-checked, the value of $domain_data
6531 after the final check could be wrong. In particular, if the second check
6532 failed, it could be set empty. This bug probably also applied to
6535 41. The strip_trailing_dot option was not being applied to the address given
6536 with the -f command-line option.
6538 42. The code for reading a message's header from the spool was incrementing
6539 $received_count, but never initializing it. This meant that the value was
6540 incorrect (doubled) while delivering a message in the same process in which
6541 it was received. In the most common configuration of Exim, this never
6542 happens - a fresh exec is done - but it can happen when
6543 deliver_drop_privilege is set.
6545 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6546 it now includes up to 150 characters of the unexpected data in the log
6549 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6550 and building data strings. The size of both of these buffers was 10 000
6551 bytes - far larger than anybody would *ever* want, thought I. Needless to
6552 say, somebody hit the limit. I have increased the maximum line length to
6553 20 000 and the maximum data length of concatenated lines to 100 000. I have
6554 also fixed two bugs, because there was no checking on these buffers. Tsk,
6555 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6556 buffer is too small.
6558 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6559 lsearch lookups. Now it does.
6561 46. When parsing a route_list item in a manualroute router, a fixed-length
6562 buffer was used for the list of hosts. I made this 1024 bytes long,
6563 thinking that nobody would ever have a list of hosts that long. Wrong.
6564 Somebody had a whole pile of complicated expansion conditions, and the
6565 string was silently truncated, leading to an expansion error. It turns out
6566 that it is easier to change to an unlimited length (owing to other changes
6567 that have happened since this code was originally written) than to build
6568 structure for giving a limitation error. The length of the item that
6569 expands into the list of hosts is now unlimited.
6571 47. The lsearch lookup could not handle data where the length of text line was
6572 more than 4095 characters. Such lines were truncated, leading to shortened
6573 data being returned. It should now handle lines of any length.
6575 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6576 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6579 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6580 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6581 no longer happens in comment lines. A list of replacements is now placed
6582 at the head of all of the source files, except those whose only change is
6583 to replace PERL_COMMAND in the very first #! line.
6585 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6586 messages on the queue, with a bottom-up merge sort, using code contributed
6587 by Michael Haardt. This should make operations like -bp somewhat faster on
6588 large queues. It won't affect queue runners, except when queue_run_in_order
6591 51. Installed eximstats 1.31 in the distribution.
6593 52. Added support for SRV lookups to the dnslookup router.
6595 53. If an ACL referred to $message_body or $message_body_end, the value was not
6596 reset for any messages that followed in the same SMTP session.
6598 54. The store-handling optimization for building very long strings was not
6599 differentiating between the different store pools. I don't think this
6600 actually made any difference in practice, but I've tidied it.
6602 55. While running the routers to verify a sender address, $sender_address
6603 was still set to the sender address. This is wrong, because when routing to
6604 send a bounce to the sender, it would be empty. Therefore, I have changed
6605 it so that, while verifying a sender address, $sender_address is set to <>.
6606 (There is no change to what happens when verifying a recipient address.)
6608 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6609 target A or AAAA records (if not already returned) without resetting the
6610 qualify_single or search_parents options of the DNS resolver. These are
6611 inappropriate in this case because the targets of MX and SRV records must
6612 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6613 target that, when qualified, matched something in the local domain. These
6614 two options are now turned off when doing these lookups.
6616 57. It seems that at least some releases of Reiserfs (which does not have the
6617 concept of a fixed number of inodes) returns zero and not -1 for the
6618 number of available inodes. This interacted badly with check_spool_inodes,
6619 which assumed that -1 was the "no such thing" setting. What I have done is
6620 to check that the total number of inodes is greater than zero before doing
6621 the test of how many are available.
6623 58. When a "warn" ACL statement has a log_message modifier, the message is
6624 remembered, and not repeated. This is to avoid a lot of repetition when a
6625 message has many recipients that cause the same warning to be written.
6626 However, Exim was preserving the list of already written lines for an
6627 entire SMTP session, which doesn't seem right. The memory is now reset if a
6628 new message is started.
6630 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6631 debugging output unless log_rewrite was also set.
6633 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6634 of (int)(handle) when we know that handle contains (void *)(-1).
6636 61. The Exim daemon panic-logs an error return when it closes the incoming
6637 connection. However "connection reset by peer" seems to be common, and
6638 isn't really an error worthy of noting specially, so that particular error
6641 62. When Exim is trying to find all the local interfaces, it used to panic and
6642 die if the ioctl to get the interface flags failed. However, it seems that
6643 on at least one OS (Solaris 9) it is possible to have an interface that is
6644 included in the list of interfaces, but for which you get a failure error
6645 for this call. This happens when the interface is not "plumbed" into a
6646 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6647 failure of the "get flags" call assumes that the interface is down.
6649 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6650 makes life easier for people who are doing arithmetic on fields extracted
6651 from dates, where you often get leading zeros that should not be
6652 interpreted as octal.
6654 64. Added qualify_domain to the redirect router, to override the global
6657 65. If a pathologically long header line contained very many addresses (the
6658 report of this problem mentioned 10 000) and each of them was rewritten,
6659 Exim could use up a very large amount of memory. (It kept on making new
6660 copies of the header line as it rewrote, and never released the old ones.)
6661 At the expense of a bit more processing, the header rewriting function has
6662 been changed so that it no longer eats memory in this way.
6664 66. The generation of the Received: header has been moved from the time that a
6665 message starts to be received, to the time that it finishes. The timestamp
6666 in the Received: header should now be very close to that of the <= log
6667 line. There are two side-effects of this change:
6669 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6670 logged header lines no longer include the local Received: line, because
6671 it has not yet been created. The same applies to a copy of the message
6672 that is returned to a non-SMTP sender when a message is rejected.
6674 (b) When a filter file is tested using -bf, no additional Received: header
6675 is added to the test message. After some thought, I decided that this
6678 This change does not affect the value of $received_for. It is still set
6679 after address rewriting, but before local_scan() is called.
6681 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6683 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6684 gave an unhelpful panic error message, and a defer error. I have managed to
6685 change this behaviour so that it now rejects any supplied certificate,
6686 which seems right, as the list of acceptable certificates is empty.
6688 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6689 gave an unhelpful defer error. I have not managed to make this reject any
6690 supplied certificates, but the error message it gives is "no certificate
6691 supplied", which is not helpful.
6693 70. exigrep's output now also includes lines that are not associated with any
6694 message, but which match the given pattern. Implemented by a patch from
6695 Martin Sluka, which also tidied up the Perl a bit.
6697 71. Recipient callout verification, like sender verification, was using <> in
6698 the MAIL FROM command. This isn't really the right thing, since the actual
6699 sender may affect whether the remote host accepts the recipient or not. I
6700 have changed it to use the actual sender in the callout; this means that
6701 the cache record is now keyed on a recipient/sender pair, not just the
6702 recipient address. There doesn't seem to be a real danger of callout loops,
6703 since a callout by the remote host to check the sender would use <>.
6704 [SEE ABOVE: changed after hitting problems.]
6706 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6707 temporary errors. However, in the case of such a code being given after
6708 the end of a data transmission (i.e. after ".") Exim was failing to write
6709 a retry record for the message. (Yes, there was some broken host that was
6710 actually sending 8xx at this point.)
6712 73. An unknown lookup type in a host list could cause Exim to panic-die when
6713 the list was checked. (An example that provoked this was putting <; in the
6714 middle of a list instead of at the start.) If this happened during a DATA
6715 ACL check, a -D file could be left lying around. This kind of configuration
6716 error no longer causes Exim to die; instead it causes a defer error. The
6717 incident is still logged to the main and panic logs.
6719 74. Buglet left over from Exim 3 conversion. The message "too many messages
6720 in one connection" was written to the rejectlog but not the mainlog, except
6721 when address rewriting (yes!) was being logged.
6723 75. Added write_rejectlog option.
6725 76. When a system filter was run not as root (that is, when system_filter_user
6726 was set), the values of the $n variables were not being returned to the
6727 main process; thus, they were not subsequently available in the $sn
6730 77. Added +return_path_on_delivery log selector.
6732 78. A connection timeout was being treated differently from recipients deferred
6733 when testing hosts_max_try with a message that was older than the host's
6734 retry timeout. (The host should not be counted, thus allowing all hosts to
6735 be tried at least once before bouncing.) This may have been the cause of an
6736 occasionally reported bug whereby a message would remain on the queue
6737 longer than the retry timeout, but would be bounced if a delivery was
6738 forced. I say "may" because I never totally pinned down the problem;
6739 setting up timeout/retry tests is difficult. See also the next item.
6741 79. The ultimate address timeout was not being applied to errors that involved
6742 a combination of host plus message (for example, a timeout on a MAIL
6743 command). When an address resolved to a number of possible hosts, and they
6744 were not all tried for each delivery (e.g. because of hosts_max_try), a
6745 message could remain on the queue longer than the retry timeout.
6747 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6750 81. Fixed an obscure SMTP outgoing bug which required at least the following
6751 conditions: (a) there was another message waiting for the same server;
6752 (b) the server returned 5xx to all RCPT commands in the first message so
6753 that the message was not completed; (c) the server dropped the connection
6754 or gave a negative response to the RSET that Exim sends to abort the
6755 transaction. The observed case was a dropped connection after DATA that had
6756 been sent in pipelining mode. That is, the server had advertised PIPELINING
6757 but was not implementing it correctly. The effect of the bug was incorrect
6758 behaviour, such as trying another host, and this could lead to a crash.
6764 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6765 and daemon.c were passed as pointers to ints; they should have been
6766 pointers to socklen_t variables (which are typically unsigned ints).
6768 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6771 3. Fixed a really odd bug that affected only the testing scheme; patching a
6772 certain fixed string in the binary changed the value of another string that
6773 happened to be identical to the end of the original first string.
6775 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6776 name", it returns that address as the IP address. On some operating
6777 systems (e.g. Solaris), it also passes back the IP address string as the
6778 "host name". However, on others (e.g. Linux), it passes back an empty
6779 string. Exim wasn't checking for this, and was changing the host name to an
6780 empty string, assuming it had been canonicalized.
6782 5. Although rare, it is permitted to have more than one PTR record for a given
6783 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6784 all the names associated with an address, because they do in Solaris.
6785 However, it seems that they do not in Linux for data that comes from the
6786 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6787 I found this out when I moved to a new Linux workstation and tried to run
6788 the Exim test suite.
6790 To get round this problem I have changed the code so that it now does its
6791 own call to the DNS to look up PTR records when searching for a host name.
6792 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6793 addresses that are only in /etc/hosts are still found.
6795 This behaviour is, however, controlled by an option called host_lookup_
6796 order, which defaults to "bydns:byaddr". If people want to use the other
6797 order, or indeed, just use one or the other means of lookup, they can
6798 specify it in this variable.
6800 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6801 some operating systems, this comes back from gethostbyaddr() as an empty
6802 string, and this is what Exim used to test for. However, it seems that in
6803 other systems, "." is yielded. Exim now tests for this case too.
6805 7. The values of check_spool_space and check_log_space are now held internally
6806 as a number of kilobytes instead of an absolute number of bytes. If a
6807 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6808 kilobyte. This means that much larger values can be stored.
6810 8. Exim monitor: an attempt to get the action menu when not actually pointing
6811 at a message produces an empty menu entitled "No message selected". This
6812 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6813 no entries in it ("Shell widget menu has zero width and/or height"). So I
6814 have added a single, blank menu entry in this case.
6816 9. Added ${quote_local_part.
6818 10. MIME decoding is now applied to the contents of Subject: header lines when
6821 11. Now that a reference to $sender_host_address automatically causes a reverse
6822 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6823 host lookup before query-style lookups in lists that might use this
6824 variable. This has therefore been abolished, and the "net-" prefix is no
6825 longer necessary for query-style lookups.
6827 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6828 have been a typo for LFLAGS, so it has been changed.
6830 13. The install script calls Exim with "-C /dev/null" in order to find the
6831 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6832 to be output. However, since Exim outputs its version number before the
6833 error, it didn't break the script. It just looked ugly. I fixed this by
6834 always allowing "-C /dev/null" if the caller is root.
6836 14. Ignore overlarge ACL variable number when reading spool file - insurance
6837 against a later release with more variables having written the file.
6839 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6840 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6841 this, as well as the form without the "IPv6" on the front.
6843 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6844 OS/Makefile-Darwin file.
6846 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6847 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6849 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6850 variable. However, some OS use ints for inodes. I've added cast to long int
6851 to get rid of the compiler warning.
6853 19. I had forgotten to lock out "/../" in configuration file names when
6854 ALT_CONFIG_PREFIX was set.
6856 20. Routers used for verification do not need to specify transports. However,
6857 if such a router generated a host list, and callout was configured, Exim
6858 crashed, because it could not find a port number from the (non-existent)
6859 transport. It now assumes port 25 in this circumstance.
6861 21. Added the -t option to exigrep.
6863 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6864 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6865 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6866 them is set, LOOKUP_LSEARCH is forced.
6868 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6870 24. Added sender and host information to the "rejected by local_scan()" log
6871 line; previously there was no indication of these.
6873 25. Added .include_if_exists.
6875 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6876 Linux. It turns out that not all file systems support this. Apparently some
6877 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6878 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6879 not supported on the file descriptor, is now ignored when Exim is trying to
6880 sync a directory. This applies only to Linux.
6882 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6884 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6885 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6888 29. Added support for maildirsize files from supplied patch (modified a bit).
6890 30. The use of :fail: followed by an empty string could lead Exim to respond to
6891 sender verification failures with (e.g.):
6893 550 Verification failed for <xxx>
6894 550 Sender verify failed
6896 where the first response line was missing the '-' that indicates it is not
6897 the final line of the response.
6899 31. The loop for finding the name of the user that called Exim had a hardwired
6900 limit of 10; it now uses the value of finduser_retries, which is used for
6901 all other user lookups.
6903 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6906 33. Exim was neglecting to zero errno before one call of strtol() when
6907 expanding a string and expecting an integer value. On some systems this
6908 resulted in spurious "integer overflow" errors. Also, it was casting the
6909 result into an int without checking.
6911 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6912 did not work. The code looks as if it has *never* worked, though it appears
6913 to have been documented since at least release 1.62. I have made it work.
6915 35. The "timeout_DNS" error in retry rules, also documented since at least
6916 1.62, also never worked. As it isn't clear exactly what this means, and
6917 clearly it isn't a major issue, I have abolished the feature by treating it
6918 as "timeout", and writing a warning to the main and panic logs.
6920 36. The display of retry rules for -brt wasn't always showing the error code
6923 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6924 timeout_connect_A, timeout_connect_MX.
6926 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6927 to the empty sender.
6929 39. The daemon was not analysing the content of -oX till after it had closed
6930 stderr and disconnected from the controlling terminal. This meant that any
6931 syntax errors were only noted on the panic log, and the return code from
6932 the command was 0. By re-arranging the code a little, I've made the
6933 decoding happen first, so such errors now appear on stderr, and the return
6934 code is 1. However, the actual setting up of the sockets still happens in
6935 the disconnected process, so errors there are still only recorded on the
6938 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6939 connections (as happens on some IP stacks) was logged at start up time as
6940 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6941 it from "IPv6 and IPv4", which means that two separate sockets are being
6944 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6945 says whether AF_INET or AF_INET6 was passed as an argument.
6947 42. Exiwhat output was messed up when time zones were included in log
6950 43. Exiwhat now gives more information about the daemon's listening ports,
6951 and whether -tls-on-connect was used.
6953 44. The "port" option of the smtp transport is now expanded.
6955 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6956 silently ignored. Now an error message is written to the main and panic
6959 46. There's a new ACL modifier called "logwrite" which writes to a log file
6960 as soon as it is encountered.
6962 47. Added $local_user_uid and $local_user_gid at routing time.
6964 48. Exim crashed when trying to verify a sender address that was being
6967 49. Exim was recognizing only a space character after ".include". It now also
6968 recognizes a tab character.
6970 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6971 extracting the relevant information from the specification. The man page no
6972 longer contains scrambled data for the -d option, and I've added a section
6973 at the front about calling Exim under different names.
6975 51. Added "extra_headers" argument to the "mail" command in filter files.
6977 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6980 53. Installed eximstats 1.29.
6982 54. Added transport_filter_timeout as a generic transport option.
6984 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6985 Cc: header lines. This was required by RFC 822, but it not required by RFC
6988 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6989 incoming messages that did not have them. Now it does so only if the
6990 message originates locally, that is, if there is no associated remote host
6991 address. When Resent- header lines are present, this applies to the Resent-
6992 lines rather than the non-Resent- lines.
6994 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6995 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6997 58. Messages for configuration errors now include the name of the main
6998 configuration file - useful now that there may be more than one file in a
6999 list (.included file names were always shown).
7001 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7002 for those rare installations that do not start the daemon as root or run it
7003 setuid root. I've cut out the call to initgroups() if the daemon is not
7006 60. The Exim user and group can now be bound into the binary as text strings
7007 that are looked up at the start of Exim's processing.
7009 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7011 62. Added $mailstore_basename variable.
7013 63. Installed patch to sieve.c from Michael Haardt.
7015 64. When Exim failed to open the panic log after failing to open the main log,
7016 the original message it was trying to log was written to stderr and debug
7017 output, but if they were not available (the usual case in production), it
7018 was lost. Now it is written to syslog before the two lines that record the
7019 failures to open the logs.
7021 65. Users' Exim filters run in subprocesses under the user's uid. It is
7022 possible for a "deliver" command or an alias in a "personal" command to
7023 provoke an address rewrite. If logging of address rewriting is configured,
7024 this fails because the process is not running as root or exim. There may be
7025 a better way of dealing with this, but for the moment (because 4.30 needs
7026 to be released), I have disabled address rewrite logging when running a
7027 filter in a non-root, non-exim process.
7033 1. The buildconfig auxiliary program wasn't quoting the value set for
7034 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7035 not defined. This bug was masked in 4.22 by the effect that was fixed in
7038 2. Some messages that were rejected after a message id was allocated were
7039 shown as "incomplete" by exigrep. It no longer does this for messages that
7040 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7042 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7043 have allow_domain_literals set, the ID did not get logged in the <= line.
7044 Domain literals are now always recognized in Message-ID: header lines.
7046 4. The first argument for a ${extract expansion item is the key name or field
7047 number. Leading and trailing spaces in this item were not being ignored,
7048 causing some misleading effects.
7050 5. When deliver_drop_privilege was set, single queue runner processes started
7051 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7052 same command in the process it spins off) were not dropping privilege.
7054 6. When the daemon running as "exim" started a queue runner, it always
7055 re-executed Exim in the spun-off process. This is a waste of effort when
7056 deliver_drop_privilege is set. The new process now just calls the
7057 queue-runner function directly.
7063 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7066 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7067 ignored. Though the use of -oP was forcing the writing of a pid file, it
7068 was always written to the default place.
7070 3. If the message "no IP address found for host xxxx" is generated during
7071 incoming verification, it is now followed by identification of the incoming
7072 connection (so you can more easily find what provoked it).
7074 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7076 5. Added some features to "harden" Exim a bit more against certain attacks:
7078 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7079 be put in Local/Makefile. This is like the never_users runtime option,
7080 but it cannot be overridden. The default setting is "root".
7082 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7083 prefix string with which any file named in a -C command line option
7086 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7087 is retained for -C and -D only if the caller of Exim is root. Without
7088 it, the exim user may also use -C and -D and retain privilege.
7090 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7091 command line option is disabled.
7093 6. Macro names set by the -D option must start with an upper case letter, just
7094 like macro names defined in the configuration file.
7096 7. Added "dereference=" facility to LDAP.
7098 8. Two instances of the typo "uknown" in the source files are fixed.
7100 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7101 the Configure-Makefile script screwed up while processing it.
7103 10. Incorporated PCRE 4.4.
7105 11. The SMTP synchronization check was not operating right at the start of an
7106 SMTP session. For example, it could not catch a HELO sent before the client
7107 waited for the greeting. There is now a check for outstanding input at the
7108 point when the greeting is written. Because of the duplex, asynchronous
7109 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7110 way, but not yet received, when the check is performed.
7112 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7113 on TCP/IP sockets, because this apparently causes some broken clients to
7116 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7117 unchanged) from the Cygwin maintainer.
7119 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7120 was supported instead of testing for mbx. Effectively a typo.
7122 15. The spa authenticator server code was not checking that the input it
7123 received was valid base64.
7125 16. The debug output line for the "set" modifier in ACLs was not showing the
7126 name of the variable that was being set.
7128 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7130 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7131 lookup on its own. Something else was needed to trigger the lookup. For
7132 example, a match in host_lookup or the need for a host name in a host list.
7133 Now, if $sender_host_name is referenced and the host name has not yet been
7134 looked up, a lookup is performed. If the lookup fails, the variable remains
7135 empty, and $host_lookup_failed is set to "1".
7137 19. Added "eqi" as a case-independent comparison operator.
7139 20. The saslauthd authentication condition could segfault if neither service
7140 nor realm was specified.
7142 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7143 error message that was logged was misleading, and incoming SMTP
7144 connections were dropped. The message is now more accurate, and temporary
7145 errors are given to SMTP connections.
7147 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7148 (except RSET) with a 421 error, until QUIT is received. However, it was
7149 failing to send a response to QUIT.
7151 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7152 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7153 ACL is now run after the helo_try_verify_hosts code.
7155 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7156 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7157 case-independent, so other case variants are also recognized). Apparently
7158 some systems use these upper case variants.
7160 25. If more than two messages were waiting for the same host, and a transport
7161 filter was specified for the transport, Exim sent two messages over the
7162 same TCP/IP connection, and then failed with "socket operation on non-
7163 socket" when it tried to send the third.
7165 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7167 27. The extern definition of crypt16() in expand.c was not being excluded when
7168 the OS had its own crypt16() function.
7170 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7171 as a preferred synonym for return_size_limit, both as an option and as an
7174 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7176 30. Changed the default configuration ACL to relax the local part checking rule
7177 for addresses that are not in any local domains. For these addresses,
7178 slashes and pipe symbols are allowed within local parts, but the sequence
7179 /../ is explicitly forbidden.
7181 31. SPA server authentication was not clearing the challenge buffer before
7184 32. log_message in a "warn" ACL statement was writing to the reject log as
7185 well as to the main log, which contradicts the documentation and doesn't
7186 seem right (because no rejection is happening). So I have stopped it.
7188 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7189 However, I am unable to do any testing of this.
7191 34. Fixed an infelicity in the appendfile transport. When checking directories
7192 for a mailbox, to see if any needed to be created, it was accidentally
7193 using path names with one or more superfluous leading slashes; tracing
7194 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7196 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7197 contents are added to the log line that is written for every discarded
7198 recipient. (Previously a log_message setting was ignored.)
7200 36. The ${quote: operator now quotes the string if it is empty.
7202 37. The install script runs exim in order to find its version number. If for
7203 some reason other than non-existence or emptiness, which it checks, it
7204 could not run './exim', it was installing it with an empty version number,
7205 i.e. as "exim-". This error state is now caught, and the installation is
7208 38. An argument was missing from the function that creates an error message
7209 when Exim fails to connect to the socket for saslauthd authentication.
7210 This could cause Exim to crash, or give a corrupted message.
7212 39. Added isip, isip4, and isip6 to ${if conditions.
7214 40. The ACL variables $acl_xx are now saved with the message, and can be
7215 accessed later in routers, transports, and filters.
7217 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7218 strings in the file are not string-expanded.
7220 42. If a MAIL command specified a SIZE value that was too large to fit into an
7221 int variable, the check against message_size_limit failed. Such values are
7222 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7223 day this will have to be increased, but I don't think I want to be around
7224 when emails are that large.
7231 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7232 iconv() is not standard in FreeBSD.
7234 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7235 IPv6 enabled. The observed symptom was a segmentation fault on return from
7236 the function os_common_find_running_interfaces() in src/os.c.
7238 3. In the check_special_case() function in daemon.c I had used "errno" as an
7239 argument name, which causes warnings on some systems. This was basically a
7240 typo, since it was named "eno" in the comments!
7242 4. The code that waits for the clock to tick (at a resolution of some fraction
7243 of a second) so as to ensure message-id uniqueness was always waiting for
7244 at least one whole tick, when it could have waited for less. [This is
7245 almost certainly not relevant at current processor speeds, where it is
7246 unlikely to ever wait at all. But we try to future-proof.]
7248 5. The function that sleeps for a time interval that includes fractions of a
7249 second contained a race. It did not block SIGALRM between setting the
7250 timer, and suspending (a couple of lines later). If the interval was short
7251 and the sigsuspend() was delayed until after it had expired, the suspension
7252 never ended. On busy systems this could lead to processes getting stuck for
7255 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7256 process, before it forks any delivery processes. The open lookup caching
7257 mechanism meant that the open file or database connection was passed into
7258 the delivery process. The problem was that delivery processes always tidy
7259 up cached lookup data. This could cause a problem for the next delivery
7260 process started by the queue runner, because the external queue runner
7261 process does not know about the closure. So the next delivery process
7262 still has data in the lookup cache. In the case of a file lookup, there was
7263 no problem because closing a file descriptor in a subprocess doesn't affect
7264 the parent. However, if the lookup was caching a connection to a database,
7265 the connection was closed, and the second delivery process was likely to
7266 see errors such as "PGSQL: query failed: server closed the connection
7267 unexpectedly". The problem has been fixed by closing all cached lookups
7268 in a queue runner before running a delivery process.
7270 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7271 seem to have the "const" qualifier which it has on other OS. I've
7274 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7275 *of the same type* (client or server) with the same public name that an
7276 error should be diagnosed.
7278 9. When Exim looked up a host name for an IP address, but failed to find the
7279 original IP address when looking up the host name (a safety check), it
7280 output the message "<ip address> does not match any IP for NULL", which was
7281 confusing, to say the least. The bug was that the host name should have
7282 appeared instead of "NULL".
7284 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7285 user that is built into the binary, and the -C or -D options is used, root
7286 privilege is dropped before the configuration file is read. In addition,
7287 logging is switched to stderr instead of the normal log files. If the
7288 configuration then re-defines the Exim user, the unprivileged environment
7289 is probably not what is expected, so Exim logs a panic warning message (but
7292 However, if deliver_drop_privilege is set, the unprivileged state may well
7293 be exactly what is intended, so the warning has been cut out in that case,
7294 and Exim is allowed to try to write to its normal log files.
7300 1. smtp_return_error_details was not giving details for temporary sender
7301 or receiver verification errors.
7303 2. Diagnose a configuration error if two authenticators have the same public
7306 3. Exim used not to create the message log file for a message until the first
7307 delivery attempt. This could be confusing when incoming messages were held
7308 for policy or load reasons. The message log file is now created at the time
7309 the message is received, and an initial "Received" line is written to it.
7311 4. The automatically generated man page for command line options had a minor
7312 bug that caused no ill effects; however, a more serious problem was that
7313 the procedure for building the man page automatically didn't always
7314 operate. Consequently, release 4.20 contains an out-of-date version. This
7315 shouldn't happen again.
7317 5. When building Exim with embedded Perl support, the script that builds the
7318 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7319 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7321 6. The freeze_tell option was not being used for messages that were frozen on
7322 arrival, either by an ACL or by local_scan().
7324 7. Added the smtp_incomplete_transaction log selector.
7326 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7327 was accepting AUTH without a new EHLO.
7329 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7330 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7333 10. Logging of TCP/IP connections (when configured) now happens in the main
7334 daemon process instead of the child process, so that the TCP/IP connection
7335 count is more accurate (but it can never be perfect).
7337 11. The use of "drop" in a nested ACL was not being handled correctly in the
7338 outer ACL. Now, if condition failure induced by the nested "drop" causes
7339 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7340 or "require"), the connection is dropped.
7342 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7343 that yield "discard" can now be used with an "accept" or a "discard" verb,
7344 but an error is generated for any others (because I can't see a useful way
7345 to define what should happen).
7347 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7348 are now processed in the same way as lines in the Exim configuration file.
7349 In particular, continuation lines are supported.
7351 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7353 15. Added -ti meaning -t -i.
7355 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7356 domains, and warn by logging if others are found.
7358 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7359 returned from GIFCONF when Exim is trying to find the list of interfaces on
7360 a host. The code in os.c has been modified to copy each ifreq to an aligned
7361 structure in all cases.
7363 Also, in some cases, the returned ifreq's were being copied to a 'struct
7364 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7365 means the last couple of bytes of an IPv6 address could be chopped if the
7366 ifreq contained only a normal sockaddr (14 bytes storage).
7368 18. Named domain lists were not supported in the hosts_treat_as_local option.
7369 An entry such as +xxxx was not recognized, and was treated as a literal
7372 19. Ensure that header lines added by a DATA ACL are included in the reject log
7373 if the ACL subsequently rejects the message.
7375 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7376 MD5 (which is deprecated).
7378 21. When testing a filter file using -bf, Exim was writing a message when it
7379 took the sender from a "From " line in the message, but it was not doing so
7380 when it took $return_path from a Return-Path: header line. It now does.
7382 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7383 with a valid header line field name (a series of printing characters
7384 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7386 23. Changed "disc" in the source to "disk" to conform to the documentation and
7387 the book and for uniformity.
7389 24. Ignore Sendmail's -Ooption=value command line item.
7391 25. When execve() failed while trying to run a command in a pipe transport,
7392 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7393 could be confused with a return value of 69 from the command itself. This
7394 has been changed to 127, the value the shell returns if it is asked to run
7395 a non-existent command. The wording for the related log line suggests a
7396 non-existent command as the problem.
7398 26. If received_header_text expands to an empty string, do not add a Received:
7399 header line to the message. (Well, it adds a token one on the spool, but
7400 marks it "old" so that it doesn't get used or transmitted.)
7402 27. Installed eximstats 1.28 (addition of -nt option).
7404 28. There was no check for failure on the call to getsockname() in the daemon
7405 code. This can fail if there is a shortage of resources on the system, with
7406 ENOMEM, for example. A temporary error is now given on failure.
7408 29. Contrary to the C standard, it seems that in some environments, the
7409 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7410 program. Exim now does this explicitly; it affects the formatting of
7411 timestamps using strftime().
7413 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7414 complaints. I've now initialized all the variables, to avoid this.
7416 32. Header lines added by a system filter were not being "seen" during
7417 transport-time rewrites.
7419 33. The info_callback() function passed to OpenSSL is set up with type void
7420 (*)(SSL *, int, int), as described somewhere. However, when calling the
7421 function (actually a macro) that sets it up, the type void(*)() is
7422 expected. I've put in a cast to prevent warnings from picky compilers.
7424 34. If a DNS black list lookup found a CNAME record, but there were no A
7425 records associated with the domain it pointed at, Exim crashed.
7427 35. If a DNS black list lookup returned more than one A record, Exim ignored
7428 all but the first. It now scans all returned addresses if a particular IP
7429 value is being sought. In this situation, the contents of the
7430 $dnslist_value variable are a list of all the addresses, separated by a
7433 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7434 to accept a host name and all its aliases if the forward lookup for any of
7435 them yielded the IP address of the incoming connection. Now it accepts only
7436 those names whose forward lookup yields the correct IP address. Any other
7437 names are discarded. This closes a loophole whereby a rogue DNS
7438 administrator could create reverse DNS records to break through a
7439 wildcarded host restriction in an ACL.
7441 37. If a user filter or a system filter that ran in a subprocess used any of
7442 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7443 the wrong values were passed to the pipe command ($thisaddress had the
7444 value of $0, $0 had the value of $1, etc). This bug was introduced by
7445 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7447 38. Improved the line breaking for long SMTP error messages from ACLs.
7448 Previously, if there was no break point between 40 and 75 characters, Exim
7449 left the rest of the message alone. Two changes have been made: (a) I've
7450 reduced the minimum length to 35 characters; (b) if it can't find a break
7451 point between 35 and 75 characters, it looks ahead and uses the first one
7452 that it finds. This may give the occasional overlong line, but at least the
7453 remaining text gets split now.
7455 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7456 file descriptors might be low, and that setting 1000 would always raise it.
7457 It turns out that in some environments, the limit is already over 1000 and
7458 that lowering it causes trouble. So now Exim takes care not to decrease it.
7460 40. When delivering a message, the value of $return_path is set to $sender_
7461 address at the start of routing (routers may change the value). By an
7462 oversight, this default was not being set up when an address was tested by
7463 -bt or -bv, which affected the outcome if any router or filter referred to
7466 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7467 log only when "message" or "log_message" are set. However, if one of the
7468 conditions was an address verification, or a call to a nested ACL, the
7469 messages generated by the underlying test were being passed through. This
7470 no longer happens. The underlying message is available in $acl_verify_
7471 message for both "message" and "log_message" expansions, so it can be
7472 passed through if needed.
7474 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7475 new expansion $bh_ to give the encoded byte string without charset
7476 translation. Translation happens only if iconv() is available; HAVE_ICONV
7477 indicates this at build time. HEADERS_CHARSET gives the charset to
7478 translate to; headers_charset can change it in the configuration, and
7479 "headers charset" can change it in an individual filter file.
7481 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7482 that creates RFC 2047 encoded "words" labels them as that charset instead
7483 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7484 expansion operator; (ii) when Exim creates a From: line for a local
7485 message; (iii) when a header line is rewritten to include a "phrase" part.
7487 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7488 buggy, causing it to skip the first lines of messages whose message ID
7489 ended in 'D'. This would not have bitten before Exim release 4.14, because
7490 message IDs were unlikely to end in 'D' before then. The effect was to have
7491 incorrect size information for certain domains.
7493 45. #include "config.h" was missing at the start of the crypt16.c module. This
7494 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7497 46. If there was a timeout during a "random" callout check, Exim treated it as
7498 a failure of the random address, and carried on sending RSET and the real
7499 address. If the delay was just some slowness somewhere, the response to the
7500 original RCPT would be taken as a response to RSET and so on, causing
7501 mayhem of various kinds.
7503 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7504 when I implemented it. It didn't allow for the fact that some option values
7505 may legitimately be negative (e.g. size_addition), and it didn't even do
7506 the right test for positive values.
7508 48. Domain names in DNS records are case-independent. Exim always looks them up
7509 in lower case. Some resolvers return domain names in exactly the case they
7510 appear in the zone file, that is, they may contain uppercase letters. Not
7511 all resolvers do this - some return always lower case. Exim was treating a
7512 change of case by a resolver as a change of domain, similar to a widening
7513 of a domain abbreviation. This triggered its re-routing code and so it was
7514 trying to route what was effectively the same domain again. This normally
7515 caused routing to fail (because the router wouldn't handle the domain
7516 twice). Now Exim checks for this case specially, and just changes the
7517 casing of the domain that it ultimately uses when it transmits the message
7520 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7523 50. If a filter generated a file delivery with a non-absolute name (possible if
7524 no home directory exists for the router), the forbid_file option was not
7527 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7528 the existing equality matching.
7530 52. Exim was using ints instead of ino_t variables in some places where it was
7531 dealing with inode numbers.
7533 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7534 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7535 called TMPDIR, and if it finds it is different, it changes its value.
7537 54. The smtp_printf() function is now made available to local_scan() so
7538 additional output lines can be written before returning. There is also an
7539 smtp_fflush() function to enable the detection of a dropped connection.
7540 The variables smtp_input and smtp_batched_input are exported to
7543 55. Changed the default runtime configuration: the message "Unknown user"
7544 has been removed from the ACL, and instead placed on the localuser router,
7545 using the cannot_route_message feature. This means that any verification
7546 failures that generate their own messages won't get overridden. Similarly,
7547 the "Unrouteable address" message that was in the ACL for unverifiable
7548 relay addresses has also been removed.
7550 56. Added hosts_avoid_esmtp to the smtp transport.
7552 57. The exicyclog script was not checking for the esoteric option
7553 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7554 will work only if exicyclog is run under the appropriate euid.
7556 58. Following a discussion on the list, the rules by which Exim recognises line
7557 endings on incoming messages have been changed. The -dropcr and drop_cr
7558 options are now no-ops, retained only for backwards compatibility. The
7559 following line terminators are recognized: LF CRLF CR. However, special
7560 processing applies to CR:
7562 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7563 nor a local message in the state where . is a terminator.
7565 (ii) If a bare CR is encountered in a header line, an extra space is added
7566 after the line terminator so as not to end the header. The reasoning
7567 behind this is that bare CRs in header lines are most likely either
7568 to be mistakes, or people trying to play silly games.
7570 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7571 was being incorrectly given as 18 bytes larger than it should have been.
7572 This is a VOB (very old bug).
7574 60. This may never have affected anything current, but just in case it has:
7575 When the local host is found other than at the start of a list of hosts,
7576 the local host, those with the same MX, and any that follow, are discarded.
7577 When the list in question was part of a longer list of hosts, the following
7578 hosts (not currently being processed) were also being discarded. This no
7579 longer happens. I'm not sure if this situation could ever has previously
7582 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7585 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7586 header. This is something that is recommended in a new Internet Draft, and
7587 is something that is documented as being done by Sendmail. There are two
7588 possible values. For messages generated by the autoreply transport, Exim
7591 Auto-Submitted: auto-replied
7593 whereas for all other generated messages (e.g. bounces) it adds
7595 Auto-Submitted: auto-generated
7597 63. The "personal" condition in filters now includes a test for the
7598 Auto-Submitted: header. If it contains the string "auto-" the message it
7599 not considered personal.
7601 64. Added rcpt_include_affixes as a generic transport option.
7603 65. Added queue_only_override (default true).
7605 66. Added the syslog_duplication option.
7607 67. If what should have been the first header line of a message consisted of
7608 a space followed by a colon, Exim was mis-interpreting it as a header line.
7609 It isn't of course - it is syntactically invalid and should therefore be
7610 treated as the start of the message body. The misbehaviour could have
7611 caused a number of strange effects, including loss of data in subsequent
7612 header lines, and spool format errors.
7614 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7615 client host had authenticated. This control can now be exercised by an ACL
7616 for more flexibility.
7618 69. By default, callouts do not happen when testing with -bh. There is now a
7619 variant, -bhc, which does actually run the callout code, including
7620 consulting and updating the callout cache.
7622 70. Added support for saslauthd authentication, courtesy of Alexander
7625 71. If statvfs() failed on the spool or log directories while checking their
7626 size for availability, Exim confusingly gave the error "space shortage".
7627 Furthermore, in debugging mode it crashed with a floating point exception.
7628 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7629 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7630 serious problem, Exim now writes to the main and panic logs when this
7631 happens, with details of the failure. It then refuses to accept the
7632 incoming message, giving the message "spool directory problem" or "log
7633 directory problem" with a 421 code for SMTP messages.
7635 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7636 0, 1, and 2 exist, because some OS complain for execs without them (see
7637 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7638 descriptors. However, the code omitted to check that the open succeeded,
7639 causing mysterious errors if for some reason the permissions on /dev/null
7640 got screwed. Now Exim writes a message to the main and panic logs, and
7641 bombs out if it can't open /dev/null.
7643 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7644 interact so that it is all more flexible. It is supposed to remain
7645 backwards compatible. Also added extra_local_interfaces.
7647 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7648 to bomb out with an assertion failure - to the client this appears as a
7649 connection drop. This problem occurs in the part of the code that was taken
7650 from the Samba project. Fortunately, the assertion is in a very simple
7651 function, so I have fixed this by reproducing the function inline in the
7652 one place where it is called, and arranging for authentication to fail
7653 instead of killing the process with assert().
7655 75. The SPA client code was not working when the server requested OEM rather
7656 than Unicode encoding.
7658 76. Added code to make require_files with a specific uid setting more usable in
7659 the case where statting the file as root fails - usually a non-root-mounted
7660 NFS file system. When this happens and the failure is EACCES, Exim now
7661 forks a subprocess and does the per-uid checking as the relevant uid.
7663 77. Added process_log_path.
7665 78. If log_file_path was not explicitly set, a setting of check_log_space or
7666 check_log_inodes was ignored.
7668 79. If a space check for the spool or log partitions fails, the incident is now
7669 logged. Of course, in the latter case the data may get lost...
7671 80. Added the %p formatting code to string_format() so that it can be used to
7672 print addresses in debug_print(). Adjusted all the address printing in the
7673 debugging in store.c to use %p rather than %d.
7675 81. There was a concern that a line of code in smtp_in.c could overflow a
7676 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7677 initially expressed, the concern was not well-founded, because trailing
7678 spaces are removed early. However, if the trailing spaces were followed by
7679 a NULL, they did not get removed, so the overflow was possible. Two fixes
7682 (a) I re-wrote the offending code in a cleaner fashion.
7683 (b) If an incoming SMTP command contains a NULL character, it is rejected
7686 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7687 runs initgroups(), so that if the Exim user is in any additional groups,
7688 they will be used during message reception.
7694 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob