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 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
66 JH/01 Avoid costly startup code when not strictly needed. This reduces time
67 for some exim process initialisations. It does mean that the logging
68 of TLS configuration problems is only done for the daemon startup.
70 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
72 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
73 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
76 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
77 DKIM signing is being done. Previously a transport_filter would always
78 disable CHUNKING, falling back to traditional DATA.
80 JH/05 Regard command-line receipients as tainted.
82 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
84 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
85 PAM library frees one of the arguments given to it, despite the
86 documentation. Therefore a plain malloc must be used.
88 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
89 on-stack buffers were used, resulting in a taint trap when DSN information
90 copied from a received message was written into the buffer.
92 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
93 the ordering of its ARC headers. This caused a crash.
95 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
96 a new record was being constructed with information from the peer, a trap
99 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
100 installation would get error messages from DMARC verify, when it hit the
101 nonexistent file indicated by the default. Distros wanting DMARC enabled
102 should both provide the file and set the option.
103 Also enforce no DMARC verification for command-line sourced messages.
105 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
106 could, depending on the platform, hang at the STARTTLS response.
108 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
109 message on a connection. Previously if one message had ARC headers and
110 the following one did not, a crash could result when adding an
111 Authentication-Results: header.
113 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
114 Exim main code and Exim-related utities. The introduction of taint
115 tracking also did many adjustments to string handling. Since then, eximon
116 frequently terminated with an assert failure.
118 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
119 check for 452 responses. This slightly helps the inefficieny of doing
120 a large alias-expansion into a recipient-limited target. The max_rcpt
121 transport option still applies (and at the current default, will override
122 the new feature). The check is done for either cause of synch, and forces
123 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
124 connection. The new facility is not tunable at this time.
126 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
127 library live data was being used, so the results became garbage. Make
128 copies while it is still usable.
130 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
131 on delivery deferred (==) and failed (**) lines (if a delivery was
132 attemtped). Previously it was only on completion (=>) lines.
134 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
135 for the expansion of the server_scram_iter and server_scram_salt options.
137 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
138 are now specifically given a NO_DATA response without hitting the system
139 resolver. The library goes on to do the now-standard TXT lookup.
140 Use of dnsdb lookups is not affected.
142 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
143 only retrieve the errormessage once. Previously two calls to dlerror()
144 were used, and the second one (for mainlog/paniclog) retrieved null
147 JH/20 Taint checking: disallow use of tainted data for
148 - the appendfile transport file and directory options
149 - the pipe transport command
150 - the autoreply transport file, log and once options
151 - file names used by the redirect router (including filter files)
153 - paths used by single-key lookups
154 Previously this was permitted.
156 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
157 adjusted the size of a major service buffer; this failed because the
158 buffer was in use at the time. Change to a compile-time increase in the
159 buffer size, when this authenticator is compiled into exim.
161 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
162 previous fast-mode was untenable in the face of glibs using mmap to
163 support larger malloc requests.
165 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
166 New values supported, if defined on system where compiled:
167 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
168 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
170 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
171 running a limited number of proceses in parallel, a benefit is gained. The
172 amount varies with the platform hardware and load. The use of the option
173 queue_run_in_order means we cannot do this, as ordering becomes
176 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
177 had introduced a string-copy (for ensuring NUL-termination) which was not
178 appropriate for that case, which can include embedded NUL bytes in the
179 block of data. Investigation showed the copy to actually be needless, the
180 data being length-specified.
182 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
183 done during a receiving connection, and both used TLS, global info was
184 used rather than per-connection info for tracking the state of data
185 queued for transmission. This could result in a connection hang.
187 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
188 Previously, when delivering serveral messages down a single connection
189 only the first would provide a SIZE. This was due to the size information
190 not being properly tracked.
192 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
193 TAI (at 37 seconds currently), pretend to be in UTC for time-related
194 expansion and logging. Previously, spurious values such as a future
195 minute could be seen.
197 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
198 it could crash from a null-deref. This could also affect the
199 ${addresses: } operator and ${readsock } item.
201 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
202 message following a mime one, the variable was not reset.
204 JH/30 When an pipelined-connect fails at the first response, assume incorrect
205 cached capability (perhaps the peer reneged?) and immediately retry in
208 JH/31 Fix spurious detection of timeout while writing to transport filter.
210 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
211 an attempt to copy the string was made before checking it.
213 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
214 taint of the lookup key was maintained; we now regard the presence in the
215 filesystem as sufficient validation.
217 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
218 argument is supplied.
220 JH/35 The dsearch lookup now requires that the directory is an absolute path.
221 Previously this was not checked, and nonempty relative paths made an
222 access under Exim's current working directory.
224 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
225 Previously no event was raised.
227 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
228 parameter supplied by the sender MAIL FROM command. Previously it was
229 ignored, and only the check_spool_space option value for the required
232 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
233 the size of the signing public-key. Previously it was instead giving
234 the size of the signature hash.
236 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
237 the default. See the (new) dkim_verify_min_keysizes option.
239 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
240 and an ACL use a lookup for checking either the local_part or domain,
241 stale data could be accessed. Ensure that variable references are
242 dropped between messages.
244 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
245 by the client was not checked as pointing within response data before
246 being used. A malicious client could thus cause an out-of-bounds read and
247 possibly gain authentication. Fix by adding the check.
249 JH/42 Internationalisation: change the default for downconversion in the smtp
250 transport to be "if needed". Previously it was "as previously set" for
251 the message, which usually meant "if needed" for message-submission but
252 "no" for everything else. However, MTAs have been seen using SMTPUTF8
253 even when the envelope addresses did not need it, resulting in forwarding
254 failures to non-supporting MTAs. A downconvert in such cases will be
255 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
256 transport. The change does mean that addresses needing conversion will
257 be converted when previously a delivery failure would occur.
259 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
260 response was received it would be used unchecked in a fail-DSN, violating
261 standards on line-length limits. Truncate if needed.
263 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
264 doesn't work. (Additionally add a new main config option to configure the
271 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
272 side, to decode a TLS 1.3 packet capture.
274 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
275 Previously the default library behaviour applied, sending two, each in
278 JH/03 Debug output for ACL now gives the config file name and line number for
281 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
283 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
285 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
286 buffer overrun for (non-chunking) other transports.
288 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
289 TLS1.3, means that a server rejecting a client certificate is not visible
290 to the client until the first read of encrypted data (typically the
291 response to EHLO). Add detection for that case and treat it as a failed
292 TLS connection attempt, so that the normal retry-in-clear can work (if
293 suitably configured).
295 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
296 and/or domain. Found and fixed by Jason Betts.
298 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
299 configuration). If a CNAME target was not a wellformed name pattern, a
302 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
303 the OS reports them interleaved with other addresses.
305 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
306 used both for input and for a verify callout, both encrypted, SMTP
307 responses being sent by the server could be lost. This resulted in
308 dropped connections and sometimes bounces generated by a peer sending
311 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
312 string. Previously it was possible to cause undefined behaviour in a
313 library routine (usually a crash). Found by "zerons".
315 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
318 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
319 API was removed, so update to use the newer ones.
321 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
322 any timeout set, is taking a long time. Previously we would hang on to a
323 rotated logfile "forever" if the input was arriving with long gaps
324 (a previous attempt to fix addressed lack, for a long time, of initial
327 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
328 shared (NFS) environment. The length of the tempfile name is now
329 4 + 16 ("hdr.$message_exim_id") which might break on file
330 systems which restrict the file name length to lower values.
333 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
334 shared (NFS) environment.
336 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
337 did for all versions <4.90). Notably -M, -m, --invert, -I may be
340 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
341 on some platforms for bit 31.
343 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
344 to changes apparently associated with TLS1.3 handling some of the APIs
345 previously used were either nonfunctional or inappropriate. Strings
346 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
347 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
348 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
349 This affects log line X= elements, the $tls_{in,out}_cipher variables,
350 and the use of specific cipher names in the encrypted= ACL condition.
352 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
354 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
355 verification result was not updated unless hosts_require_ocsp applied.
357 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
358 queue_list_requires_admin set to false, non-admin users were denied the
361 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
362 directory-of-certs mode. Previously they were advertised despite the
365 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
366 A single TCP connection by a client will now hold a TLS connection open
367 for multiple message deliveries, by default. Previously the default was to
370 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
371 default. If built with the facility, DANE will be used. The facility
372 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
374 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
375 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
376 must be defined and you must still, unless you define DISABLE_TLS, manage
377 the the include-dir and library-file requirements that go with that
378 choice. Non-TLS builds are still supported.
380 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
383 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
384 default. If the platform supports and has the facility enabled, it will
385 be requested on all coneections.
387 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
388 controlled by the build-time option SUPPORT_PIPE_CONNECT.
390 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
392 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
393 success-DSN messages. Previously the From: header was always the default
394 one for these; the option was ignored.
396 JH/28 Fix the timeout on smtp response to apply to the whole response.
397 Previously it was reset for every read, so a teergrubing peer sending
398 single bytes within the time limit could extend the connection for a
399 long time. Credit to Qualsys Security Advisory Team for the discovery.
401 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
402 delivery address, which leaked information of the results of local
403 forwarding. Change to the original envelope recipient address, per
406 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
407 requested. Previously not bounce was generated and a log entry of
408 error ignored was made.
410 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
412 JH/32 Introduce a general tainting mechanism for values read from the input
413 channel, and values derived from them. Refuse to expand any tainted
414 values, to catch one form of exploit.
416 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
417 was unused and the unexpanded text used for the test. Found and
418 fixed by Ruben Jenster.
420 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
421 an attempt to use a TLS library read routine dereffed a nul pointer,
424 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
425 them in our smtp response.
427 JH/36 Have the general router option retry_use_local_part default to true when
428 any of the restrictive preconditions are set (to anything). Previously it
429 was only for check_local user. The change removes one item of manual
430 configuration which is required for proper retries when a remote router
431 handles a subset of addresses for a domain.
433 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
434 link count into consideration.
436 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
437 caused the extension of big_buffer, the following lines were ignored.
439 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
440 accordance with RFC 2308. Previously there was no expiry, so a longlived
441 receive process (eg. due to ACL delays) versus a short SOA value could
444 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
446 JH/39 Promote DMARC support to mainline.
448 JH/40 Bug 2452: Add a References: header to DSNs.
450 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
451 parameters. The relevant library call is documented as "Deprecated: This
452 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
453 3.6.0, DH parameters are negotiated following RFC7919."
455 HS/06 Change the default of dnssec_request_domains to "*"
457 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
458 carried on and emitted a BDAT command, even when PIPELINING was not
461 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
462 buffer was used for the filename, resulting in a trap when tainted
463 arguments (eg. $domain) were used.
465 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
466 recommended to avoid a possible server-load attack. The feature can be
467 re-enabled via the openssl_options main cofiguration option.
469 JH/45 local_scan API: documented the current smtp_printf() call. This changed
470 for version 4.90 - adding a "more data" boolean to the arguments.
471 Bumped the ABI version number also, this having been missed previously;
472 release versions 4.90 to 4.92.3 inclusive were effectively broken in
473 respect of usage of smtp_printf() by either local_scan code or libraries
474 accessed via the ${dlfunc } expansion item. Both will need coding
475 adjustment for any calls to smtp_printf() to match the new function
476 signature; a FALSE value for the new argument is always safe.
478 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
479 the file-offset (which the Linux syscall does, and exim expects); this
480 resulted in an indefinite loop.
482 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
483 to do ARC verification. The Authentication-Results: header line added
484 by the configuration then had no ARC item.
490 JH/01 Remove code calling the customisable local_scan function, unless a new
491 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
493 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
494 non-signal-safe functions being used.
496 JH/03 Bug 2269: When presented with a received message having a stupidly large
497 number of DKIM-Signature headers, disable DKIM verification to avoid
498 a resource-consumption attack. The limit is set at twenty.
500 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
501 report of oldest_pass in ${authres } in consequence, and separate out
502 some descriptions of reasons for verification fail.
504 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
505 files in the spool were present and unlocked. A queue-runner could spot
506 them, resulting in a duplicate delivery. Fix that by doing the unlock
507 after the unlink. Investigation by Tim Stewart. Take the opportunity to
508 add more error-checking on spoolfile handling while that code is being
511 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
512 No known attacks, no CVE, this is defensive hardening.
514 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
515 a queue-runner could start a delivery while other operations were ongoing.
516 Cutthrough delivery was a common victim, resulting in duplicate delivery.
517 Found and investigated by Tim Stewart. Fix by using the open message data
518 file handle rather than opening another, and not locally closing it (which
519 releases a lock) for that case, while creating the temporary .eml format
520 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
522 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
523 $sender_verify_failure/$recipient_verify_failure to "random".
525 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
528 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
529 Previously this would segfault.
531 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
534 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
535 like zero, since the resolver should be doing this for us, But we need one
536 as a CNAME but no MX presence gets the CNAME returned; we need to check
537 that doesn't point to an MX to declare it "no MX returned" rather than
538 "error, loop". A new main option is added so the older capability of
539 following some limited number of chain links is maintained.
541 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
543 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
544 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
545 now-deprecated earlier definitions used only specified the range up to TLS
546 1.2 (in the older-version library docs).
548 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
550 JH/15 Rework TLS client-side context management. Stop using a global, and
551 explicitly pass a context around. This enables future use of TLS for
552 connections to service-daemons (eg. malware scanning) while a client smtp
553 connection is using TLS; with cutthrough connections this is quite likely.
555 JH/16 Fix ARC verification to do AS checks in reverse order.
557 JH/17 Support a "tls" option on the ${readsocket } expansion item.
559 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
560 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
561 Previously the "utf8" would be re-prepended for every additional message.
563 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
564 Previously thery were accepted, resulting in issues when attempting to
565 forward messages to a non-supporting MTA.
567 PP/02 Let -n work with printing macros too, not just options.
569 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
570 one parent address was copied, and bogus data was used at delivery-logging
571 time. Either a crash (after delivery) or bogus log data could result.
572 Discovery and analysis by Tim Stewart.
574 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
575 Previously if the string ended mid-character, we did not insert the
576 promised '?' replacement.
578 PP/04 Documentation: current string operators work on bytes, not codepoints.
580 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
581 should pack well giving a smaller memory footprint so better caching and
582 therefore performance. Group the declarations where this can't be done so
583 that the byte-sized flag variables are not interspersed among pointer
584 variables, giving a better chance of good packing by the compiler.
586 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
587 non-null, to avoid issues with sites running BATV. Previously reports were
588 sent with an empty envelope sender so looked like bounces.
590 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
591 The ignore_error flag wasn't being returned from the filter subprocess so
592 was not set for later routers. Investigation and fix by Matthias Kurz.
594 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
595 and a msg:complete for the whole, when a message is manually removed using
596 -Mrm. Developement by Matthias Kurz, hacked on by JH.
598 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
599 a "Gnu special" function, asprintf() in the DB utility binary builds; I
600 hope that is portable enough.
602 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
603 requiring a known-CA anchor certificate; make it now rely entirely on the
604 TLSA as an anchor. Checking the name on the leaf cert against the name
605 on the A-record for the host is still done for TA (but not for EE mode).
607 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
608 included in delivery lines for non-proxied connections, when compiled with
609 SUPPORT_SOCKS and running with proxy logging enabled.
611 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
612 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
613 move the existing event to fire before the normal logging of message
614 failure so that custom logging is bracketed by normal logging.
616 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
617 msg:fail:internal event. Developement by Matthias Kurz.
619 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
620 far too small for todays use of crypto signatures stored there. Go all
621 the way to the max DNS message size of 64kB, even though this might be
622 overmuch for IOT constrained device use.
624 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
625 copy a string over itself. The library routine is documented as not
626 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
628 JH/32 For main options check_spool_space and check_inode_space, where the
629 platform supports 64b integers, support more than the previous 2^31 kB
630 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
631 the previous G, M, k.
633 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
634 $authenticated_fail_id variable on authentication failure. Previously
637 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
638 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
639 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
640 GNUTLS_SEC_PARAM_MEDIUM.
642 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
643 side. Previously we would continue as if no SNI had been received.
645 JH/36 Harden the handling of string-lists. When a list consisted of a sole
646 "<" character, which should be a list-separator specification, we walked
647 off past the nul-terimation.
649 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
650 causes) even when the retry time is not yet met. Previously they were
651 not, meaning that when (say) an account was over-quota and temp-rejecting,
652 and multiple senders' messages were queued, only one sender would get
653 notified on each configured delay_warning cycle.
655 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
657 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
658 cipher-suites, an error can be left on the stack even for a succeeding
659 accept; this results in impossible error messages when a later operation
662 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
663 return error codes indicating retry. Under TLS1.3 this becomes required.
665 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
666 it only wrote the new authenticators, resulting in a lack of tracking of
667 peer changes of ESMTP extensions until the next cache flush.
669 JH/41 Fix the loop reading a message header line to check for integer overflow,
670 and more-often against header_maxsize. Previously a crafted message could
671 induce a crash of the recive process; now the message is cleanly rejected.
673 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
674 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
680 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
681 When redis_servers is set to a list of > 1 element, and the Redis servers
682 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
683 case of MOVED into a DEFER case instead, thus moving the query onto the
684 next server in the list. For a cluster of N elements, all N servers must
685 be defined in redis_servers.
687 GF/02 Catch and remove uninitialized value warning in exiqsumm
688 Check for existence of @ARGV before looking at $ARGV[0]
690 JH/01 Replace the store_release() internal interface with store_newblock(),
691 which internalises the check required to safely use the old one, plus
692 the allocate and data copy operations duplicated in both (!) of the
693 extant use locations.
695 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
696 modifier. This matches the restriction on the commandline.
698 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
699 Previously only the last row was returned.
701 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
702 we assumed that tags in the header were well-formed, and parsed the
703 element content after inspecting only the first char of the tag.
704 Assumptions at that stage could crash the receive process on malformed
707 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
708 While running the DKIM ACL we operate on the Permanent memory pool so that
709 variables created with "set" persist to the DATA ACL. Also (at any time)
710 DNS lookups that fail create cache records using the Permanent pool. But
711 expansions release any allocations made on the current pool - so a dnsdb
712 lookup expansion done in the DKIM ACL releases the memory used for the
713 DNS negative-cache, and bad things result. Solution is to switch to the
714 Main pool for expansions.
715 While we're in that code, add checks on the DNS cache during store_reset,
716 active in the testsuite.
717 Problem spotted, and debugging aided, by Wolfgang Breyha.
719 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
720 When none of the hosts presented to a transport match an already-open
721 connection, close it and proceed with the list. Previously we would
722 queue the message. Spotted by Lena with Yahoo, probably involving
725 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
726 Previously a spurious "250 OK id=" response was appended to the proper
729 JH/08 The "support for" informational output now, which built with Content
730 Scanning support, has a line for the malware scanner interfaces compiled
731 in. Interface can be individually included or not at build time.
733 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
734 by the template makefile "src/EDITME". The "STREAM" support for an older
735 ClamAV interface method is removed.
737 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
738 rows affected is given instead).
740 JH/11 The runtime Berkeley DB library version is now additionally output by
741 "exim -d -bV". Previously only the compile-time version was shown.
743 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
744 SMTP connection. Previously, when one had more receipients than the
745 first, an abortive onward connection was made. Move to full support for
746 multiple onward connections in sequence, handling cutthrough connection
747 for all multi-message initiating connections.
749 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
750 routers. Previously, a multi-recipient message would fail to match the
751 onward-connection opened for the first recipient, and cause its closure.
753 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
754 a timeout on read on a GnuTLS initiating connection, resulting in the
755 initiating connection being dropped. This mattered most when the callout
756 was marked defer_ok. Fix to keep the two timeout-detection methods
759 JH/15 Relax results from ACL control request to enable cutthrough, in
760 unsupported situations, from error to silently (except under debug)
761 ignoring. This covers use with PRDR, frozen messages, queue-only and
764 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
766 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
767 metadata, resulting in a crash in free().
769 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
770 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
771 Broken also in d185889f4, with init system revamp.
773 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
774 Previously we abruptly closed the connection after reading a malware-
775 found indication; now we go on to read the "scan ok" response line,
778 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
779 ACL. Previously, a crash would result.
781 JH/19 Speed up macro lookups during configuration file read, by skipping non-
782 macro text after a replacement (previously it was only once per line) and
783 by skipping builtin macros when searching for an uppercase lead character.
785 JH/20 DANE support moved from Experimental to mainline. The Makefile control
786 for the build is renamed.
788 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
789 was allocated for every new TLS startup, meaning one per message. Fix
790 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
792 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
793 reported the original. Fix to report (as far as possible) the ACL
794 result replacing the original.
796 JH/23 Fix memory leak during multi-message connections using STARTTLS under
797 OpenSSL. Certificate information is loaded for every new TLS startup,
798 and the resources needed to be freed.
800 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
802 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
805 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
806 DATA response info to the (existing) per-recipient response info for
807 the "C=" log element. It can have useful tracking info from the
808 destination system. Patch from Simon Arlott.
810 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
811 length value. Previously this would segfault.
813 HS/02 Support Avast multiline protoocol, this allows passing flags to
814 newer versions of the scanner.
816 JH/28 Ensure that variables possibly set during message acceptance are marked
817 dead before release of memory in the daemon loop. This stops complaints
818 about them when the debug_store option is enabled. Discovered specifically
819 for sender_rate_period, but applies to a whole set of variables.
820 Do the same for the queue-runner and queue-list loops, for variables set
821 from spool message files. Do the same for the SMTP per-message loop, for
822 certain variables indirectly set in ACL operations.
824 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
825 as a multi-recipient message from a mailinglist manager). The coding had
826 an arbitrary cutoff number of characters while checking for more input;
827 enforced by writing a NUL into the buffer. This corrupted long / fast
828 input. The problem was exposed more widely when more pipelineing of SMTP
829 responses was introduced, and one Exim system was feeding another.
830 The symptom is log complaints of SMTP syntax error (NUL chars) on the
831 receiving system, and refused recipients seen by the sending system
832 (propating to people being dropped from mailing lists).
833 Discovered and pinpointed by David Carter.
835 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
836 replaced by the ${authresults } expansion.
838 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
840 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
841 allows proper process termination in container environments.
843 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
844 Previously the "final dot" had a newline after it; ensure it is CR,LF.
846 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
847 and "err_perm", deprecated since 4.83 when the RFC-defined words
848 "temperror" and "permerror" were introduced.
850 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
851 transport-filters or DKIM-signing. The restriction was lost in the
852 consolidation of verify-callout and delivery SMTP handling.
853 Extend the restriction to also cover ARC-signing.
855 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
856 in defer=pass mode supply a 450 to the initiator. Previously the message
859 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
860 tls_require_ciphers is used as before.
862 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
863 "pass_unscanned". Only tmpfails from the scanner are written to
864 the paniclog, as they may require admin intervention (permission
865 denied, license issues). Other scanner errors (like decompression
866 bombs) do not cause a paniclog entry.
868 JH/36 Fix reinitialisation of DKIM logging variable between messages.
869 Previously it was possible to log spurious information in receive log
872 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
873 triggered odd behaviour from Outlook Express clients.
875 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
878 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
879 since the IETF WG has not yet settled on that versus the original
880 "bare" representation.
882 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
883 Previously the millisecond value corrupted the output.
884 Fix also for syslog_pid=no and log_selector +pid, for which the pid
885 corrupted the output.
891 JH/01 Rework error string handling in TLS interface so that the caller in
892 more cases is responsible for logging. This permits library-sourced
893 string to be attached to addresses during delivery, and collapses
894 pairs of long lines into single ones.
896 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
897 during configuration. Wildcards are allowed and expanded.
899 JH/02 Rework error string handling in DKIM to pass more info back to callers.
900 This permits better logging.
902 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
903 do not close it down and have the child transport start it up again on
904 the passed-on TCP connection. Instead, proxy the child (and any
905 subsequent ones) for TLS via a unix-domain socket channel. Logging is
906 affected: the continued delivery log lines do not have any DNSSEC, TLS
907 Certificate or OCSP information. TLS cipher information is still logged.
909 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
910 identical IP addresses on different listening ports. Will also affect
913 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
914 add noisy ifdef guards to special-case this sillyness.
915 Patch from Bernd Kuhls.
917 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
918 than 255 are no longer allowed.
920 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
921 Disable the session-cache too, which might reduce our load. Since we
922 currrectly use a new context for every connection, both as server and
923 client, there is no benefit for these.
924 GnuTLS appears to not support tickets server-side by default (we don't
925 call gnutls_session_ticket_enable_server()) but client side is enabled
926 by default on recent versions (3.1.3 +) unless the PFS priority string
929 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
930 <https://reproducible-builds.org/specs/source-date-epoch/>.
932 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
933 the check for any unsuccessful recipients did not notice the limit, and
934 erroneously found still-pending ones.
936 JH/08 Pipeline CHUNKING command and data together, on kernels that support
937 MSG_MORE. Only in-clear (not on TLS connections).
939 JH/09 Avoid using a temporary file during transport using dkim. Unless a
940 transport-filter is involved we can buffer the headers in memory for
941 creating the signature, and read the spool data file once for the
942 signature and again for transmission.
944 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
945 4.77 as the kernel support then wasn't solid, having issues in 64bit
946 mode. Now, it's been long enough. Add support for FreeBSD also.
948 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
949 case where the routing stage had gathered several addresses to send to
950 a host before calling the transport for the first, we previously failed
951 to close down TLS in the old transport process before passing the TCP
952 connection to the new process. The new one sent a STARTTLS command
953 which naturally failed, giving a failed delivery and bloating the retry
954 database. Investigation and fix prototype from Wolfgang Breyha.
956 JH/12 Fix check on SMTP command input synchronisation. Previously there were
957 false-negatives in the check that the sender had not preempted a response
958 or prompt from Exim (running as a server), due to that code's lack of
959 awareness of the SMTP input buffering.
961 PP/04 Add commandline_checks_require_admin option.
962 Exim drops privileges sanely, various checks such as -be aren't a
963 security problem, as long as you trust local users with access to their
964 own account. When invoked by services which pass untrusted data to
965 Exim, this might be an issue. Set this option in main configuration
966 AND make fixes to the calling application, such as using `--` to stop
969 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
970 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
971 responses to those, into a single TLS record each way (this usually means
972 a single packet). As a side issue, smtp_enforce_sync now works on TLS
975 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
976 affects you only if you're dancing at the edge of the param size limits.
977 If you are, and this message makes sense to you, then: raise the
978 configured limit or use OpenSSL 1.1. Nothing we can do for older
981 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
982 cmdline element to get the documented default one. Previously it was
985 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
986 are unsuable for non-message-specific reasons - eg. connection timeout,
987 banner-time rejection.
989 JH/16 Fix logging of delivery remote port, when specified by router, under
992 PP/06 Repair manualroute's ability to take options in any order, even if one
993 is the name of a transport.
996 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
998 JH/17 Change the list-building routines interface to use the expanding-string
999 triplet model, for better allocation and copying behaviour.
1001 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1002 Previously it was constructed the first time a possibly-matching string
1003 was met in the configuration file input during startup; now it is done
1006 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1007 compatible one, to avoid the (poorly documented) possibility of a config
1008 file in the working directory redirecting the DB files, possibly correpting
1009 some existing file. CVE-2017-10140 assigned for BDB.
1011 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1012 cache-hot. Previously, although the result was properly cached, the
1013 initial verify call returned a defer.
1015 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1016 the main verify for receipient in uncached-mode.
1018 JH/22 Retire historical build files to an "unsupported" subdir. These are
1019 defined as "ones for which we have no current evidence of testing".
1021 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1022 if present. Previously it was ignored.
1024 JH/24 Start using specified-initialisers in C structure init coding. This is
1025 a C99 feature (it's 2017, so now considered safe).
1027 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1028 if was a fixed-sized field and bitmask ops via macros; it is now more
1031 PP/07 GitHub PR 56: Apply MariaDB build fix.
1032 Patch provided by Jaroslav Škarvada.
1034 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1035 during Coverity cleanups [4.87 JH/47]
1036 Diagnosis and fix provided by Michael Fischer v. Mollard.
1038 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1039 the right size to place the terminating semicolon on its own folded
1040 line, the header hash was calculated to an incorrect value thanks to
1041 the (relaxed) space the fold became.
1043 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1044 and confused the parent.
1046 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1047 which could crash as a result. This could lead to undeliverable messages.
1049 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1052 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1053 matters on fast-turnover and PID-randomising systems, which were getting
1054 out-of-order delivery.
1056 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1057 a possibly-overlapping copy. The symptom was that "Remote host closed
1058 connection in response to HELO" was logged instead of the actual 4xx
1061 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1062 Previously only that bufferd was discarded, resulting in SYMTP command
1065 JH/32 DKIM: when a message has multiple signatures matching an identity given
1066 in dkim_verify_signers, run the dkim acl once for each. Previously only
1067 one run was done. Bug 2189.
1069 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1070 "panic the current process" to "deliberately defer". The panic log is
1071 still written with the problem list name; the mail and reject logs now
1072 get a temp-reject line for the message that was being handled, saying
1073 something like "domains check lookup or other defer". The SMTP 451
1074 message is still "Temporary local problem".
1076 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1077 A crafted sequence of BDAT commands could result in in-use memory beeing
1078 freed. CVE-2017-16943.
1080 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1081 from SMTP input. Previously it was always done; now only done for DATA
1082 and not BDAT commands. CVE-2017-16944.
1084 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1085 to the message (such as an overlong header line). Previously this was
1086 not done and we did not exit BDAT mode. Followon from the previous item
1087 though a different problem.
1093 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1094 than -2003 did; needs libidn2 in addition to libidn.
1096 JH/02 The path option on a pipe transport is now expanded before use.
1098 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1099 Patch provided by "Björn", documentation fix added too.
1101 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1102 missing a wire-to-host endian conversion.
1104 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1105 close after a BDAT command line could be taken as a following command,
1106 giving a synch failure. Fix by only checking for synch immediately
1107 before acknowledging the chunk.
1109 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1110 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1111 macro. Patches provided by Josh Soref.
1113 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1114 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1115 by IANA as a service extension. However, John Klensin suggests that we
1118 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1119 the dkim code may be unix-mode line endings rather than smtp wire-format
1120 CRLF, so prepend a CR to any bare LF.
1122 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1123 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1125 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1126 the first were themselves being wrongly included in the feed into dkim
1127 processing; with most chunk sizes in use this resulted in an incorrect
1128 body hash calculated value.
1130 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1131 DKIM signature block, for verification. Although advised against by
1132 standards it is specifically not ruled illegal.
1134 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1136 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1137 missing a body hash (the bh= tag).
1139 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1140 It seems that HAProxy sends the Proxy Protocol information in clear and
1141 only then does a TLS startup, so do the same.
1143 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1144 TCP connections (such as for Spamd) unless the daemon successfully set
1145 Fast Open mode on its listening sockets. This fixes breakage seen on
1146 too-old kernels or those not configured for Fast Open, at the cost of
1147 requiring both directions being enabled for TFO, and TFO never being used
1148 by non-daemon-related Exim processes.
1150 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1151 endings, at least on the first header line. Try to canonify any that get
1152 past that check, despite the cost.
1154 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1155 now limited to an arbitrary five deep, while parsing addresses with the
1156 strip_excess_angle_brackets option enabled.
1158 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1159 instead leave the unprompted TLS handshake in socket buffer for the
1160 TLS library to consume.
1162 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1164 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1166 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1167 region in one operation, for speed, and this leaves assigned pointers
1168 dangling. Add checks run only under the testsuite which checks all
1169 variables at a store-reset and panics on a dangling pointer; add code
1170 explicitly nulling out all the variables discovered. Fixes one known
1171 bug: a transport crash, where a dangling pointer for $sending_ip_address
1172 originally assigned in a verify callout, is re-used.
1174 PP/06 Drop '.' from @INC in various Perl scripts.
1176 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1178 PP/08 Reduce a number of compilation warnings under clang; building with
1179 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1180 should be warning-free.
1182 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1184 HS/01 Fix portability problems introduced by PP/08 for platforms where
1185 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1187 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1188 chunk. This allows us to accept broken chunked messages. We need a more
1189 general solution here.
1191 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1192 already-broken messages in the queue.
1194 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1196 JH/19 Fix reference counting bug in routing-generated-address tracking.
1202 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1203 supports it and a size is available (ie. the sending peer gave us one).
1205 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1206 years of being deprecated). The replacements are the ACLs
1207 acl_smtp_mime and acl_not_smtp_mime.
1209 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1210 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1211 or even an in-clear connection were permitted. Now, if the host lookup
1212 was dnssec and dane was requested then the host is only used if the
1213 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1214 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1215 if one fails this test.
1216 This means that a poorly-configured remote DNS will make it incommunicado;
1217 but it protects against a DNS-interception attack on it.
1219 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1220 non-noisy when a race steals the message being considered.
1222 JH/05 If main configuration option tls_certificate is unset, generate a
1223 self-signed certificate for inbound TLS connections.
1225 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1226 in rewrites and routers.
1228 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1229 and logged a warning sing 4.83; now they are a configuration file error.
1231 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1232 (lacking @domain). Apply the same qualification processing as RCPT.
1234 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1236 JH/10 Support ${sha256:} applied to a string (as well as the previous
1239 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1240 a cutthrough deliver is pending, as we always want to make a connection.
1241 This also avoids re-routing the message when later placing the cutthrough
1242 connection after a verify cache hit.
1243 Do not update it with the verify result either.
1245 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1246 when routing results in more than one destination address.
1248 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1249 signing (which inhibits the cutthrough capability). Previously only
1250 the presence of an option was tested; now an expansion evaluating as
1251 empty is permissible (obviously it should depend only on data available
1252 when the cutthrough connection is made).
1254 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1255 the relevant preceding SMTP command did not note the pipelining mode.
1257 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1258 Previously they were not counted.
1260 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1261 as one having no matching records. Previously we deferred the message
1262 that needed the lookup.
1264 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1265 distinguished as "(=".
1267 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1268 for missing MX records. Previously it only worked for missing A records.
1270 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1272 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1273 after the data-go-ahead and data-ack. Patch from Jason Betts.
1275 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1276 even for a "none" policy. Patch from Tony Meyer.
1278 JH/22 Fix continued use of a connection for further deliveries. If a port was
1279 specified by a router, it must also match for the delivery to be
1282 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1283 When one of the recipients of a message was unsuitable for the connection
1284 (has no matching addresses), we lost track of needing to mark it
1285 deferred. As a result mail would be lost.
1287 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1289 JH/25 Decoding ACL controls is now done using a binary search; the source code
1290 takes up less space and should be simpler to maintain. Merge the ACL
1291 condition decode tables also, with similar effect.
1293 JH/26 Fix problem with one_time used on a redirect router which returned the
1294 parent address unchanged. A retry would see the parent address marked as
1295 delivered, so not attempt the (identical) child. As a result mail would
1298 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1299 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1300 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1303 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1304 Main config options check_{log,spool}_{inodes,space} are now
1305 100 inodes, 10MB unless set otherwise in the configuration.
1307 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1308 Previously it only applied to the main-section connection policy
1311 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1313 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1314 by me. Added RFC7919 DH primes as an alternative.
1316 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1317 are not in the system include path.
1319 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1320 GnuTLS, when a session startup failed (eg because the client disconnected)
1321 Exim did stdio operations after fclose. This was exposed by a recent
1322 change which nulled out the file handle after the fclose.
1324 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1325 signed directly by the cert-signing cert, rather than an intermediate
1326 OCSP-signing cert. This is the model used by LetsEncrypt.
1328 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1330 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1331 an incoming connection.
1333 HS/02 Bug 1802: Do not half-close the connection after sending a request
1336 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1337 fallback to "prime256v1".
1339 JH/34 SECURITY: Use proper copy of DATA command in error message.
1340 Could leak key material. Remotely exploitable. CVE-2016-9963.
1346 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1347 and 3.4.4 - once the server is enabled to respond to an OCSP request
1348 it does even when not requested, resulting in a stapling non-aware
1349 client dropping the TLS connection.
1351 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1352 support variable-length bit vectors. No functional change.
1354 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1355 The I= interface field on outgoing lines is now after the H= remote
1356 host field, same as incoming lines. There is a separate
1357 outgoing_interface log selector which allows you to disable the
1360 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1361 If not running log_selector +smtp_connection the mainlog would be held
1362 open indefinitely after a "too many connections" event, including to a
1363 deleted file after a log rotate. Leave the per net connection logging
1364 leaving it open for efficiency as that will be quickly detected by the
1365 check on the next write.
1367 HS/01 Bug 1671: Fix post transport crash.
1368 Processing the wait-<transport> messages could crash the delivery
1369 process if the message IDs didn't exist for some reason. When
1370 using 'split_spool_directory=yes' the construction of the spool
1371 file name failed already, exposing the same netto behaviour.
1373 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1374 mime_regex ACL conditions.
1376 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1377 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1378 to HELO, local diagnostic string.
1380 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1381 log line to debug. Even when configured with a tls authenticator many
1382 client connections are expected to not authenticate in this way, so
1383 an authenticate fail is not an error.
1385 HS/02 Add the Exim version string to the process info. This way exiwhat
1386 gives some more detail about the running daemon.
1388 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1389 matter for fast-change records such as DNSBLs.
1391 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1392 retry record, even if constant. There may be multiple transports with
1393 different interface settings and the retry behaviour needs to be kept
1396 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1398 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1400 JH/10 Bug 840: fix log_defer_output option of pipe transport
1402 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1403 hosts_randomize. This matters a lot when combined with mua_wrapper.
1405 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1406 ${quote_pgsql:<string>} operator.
1408 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1410 JH/14 Change header file name for freeradius-client. Relevant if compiling
1411 with Radius support; from the Gentoo tree and checked under Fedora.
1413 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1415 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1416 option transport_filter, meaning no filtering.
1418 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1420 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1421 defaults to "*" (all hosts). The variable is now available when not built
1422 with TLS, default unset, mainly to enable keeping the testsuite sane.
1423 If a server certificate is not supplied (via tls_certificate) an error is
1424 logged, and clients will find TLS connections fail on startup. Presumably
1425 they will retry in-clear.
1426 Packagers of Exim are strongly encouraged to create a server certificate
1427 at installation time.
1429 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1430 with the $config_file variable.
1432 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1433 in transport context, after the attempt, and per-recipient. The latter type
1434 is per host attempted. The event data is the error message, and the errno
1435 information encodes the lookup type (A vs. MX) used for the (first) host,
1436 and the trailing two digits of the smtp 4xx response.
1438 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1439 to write to mainlog (or rejectlog, paniclog) in the window between file
1440 creation and permissions/ownership being changed. Particularly affects
1441 installations where exicyclog is run as root, rather than exim user;
1442 result is that the running daemon panics and dies.
1444 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1446 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1447 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1448 "pri" and "weight". Note that the previous implicit priority given by the
1449 list order is no longer honoured.
1451 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1452 for DKIM processing.
1454 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1455 by defining SUPPORT_SOCKS.
1457 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1458 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1459 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1460 variables are renamed to proxy_{local,external}_{address,port}.
1462 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1463 for a build by defining SUPPORT_I18N
1465 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1466 of the query string, and make ${quote_redis:} do that quoting.
1468 JH/29 Move Events support from Experimental to mainline, enabled by default
1469 and removable for a build by defining DISABLE_EVENT.
1471 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1473 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1474 cached by the daemon.
1476 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1477 by defining LOOKUP_REDIS. The libhiredis library is required.
1479 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1480 keys are given for lookup.
1482 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1483 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1484 only supported when built with TLS support. The PolarSSL SHA routines
1485 are still used when the TLS library is too old for convenient support.
1487 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1488 openssl_options), for security. OpenSSL forces this from version 1.1.0
1489 server-side so match that on older versions.
1491 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1492 allocation for $value could be released as the expansion processing
1493 concluded, but leaving the global pointer active for it.
1495 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1496 and to use the domains and local_parts ACL conditions.
1498 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1499 incorrectly not doubled on cutthrough transmission, hence seen as a
1500 body-termination at the receiving system - resulting in truncated mails.
1501 Commonly the sender saw a TCP-level error, and retransmitted the message
1502 via the normal store-and-forward channel. This could result in duplicates
1503 received - but deduplicating mailstores were liable to retain only the
1504 initial truncated version.
1506 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1508 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1510 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1511 we're in there, support oversigning also; bug 1309.
1513 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1515 HS/04 Add support for keep_environment and add_environment options.
1517 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1518 either intentional arithmetic overflow during PRNG, or testing config-
1521 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1522 delivery resulted in actual delivery. Cancel cutthrough before DATA
1525 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1526 rejects a recipient: pass the reject to the originator.
1528 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1529 Many were false-positives and ignorable, but it's worth fixing the
1532 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1533 for the new environment-manipulation done at startup. Move the routines
1534 from being local to tls.c to being global via the os.c file.
1536 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1537 an extract embedded as result-arg for a map, the first arg for extract
1538 is unavailable so we cannot tell if this is a numbered or keyed
1539 extraction. Accept either.
1545 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1548 JH/02 The smtp transport option "multi_domain" is now expanded.
1550 JH/03 The smtp transport now requests PRDR by default, if the server offers
1553 JH/04 Certificate name checking on server certificates, when exim is a client,
1554 is now done by default. The transport option tls_verify_cert_hostnames
1555 can be used to disable this per-host. The build option
1556 EXPERIMENTAL_CERTNAMES is withdrawn.
1558 JH/05 The value of the tls_verify_certificates smtp transport and main options
1559 default to the word "system" to access the system default CA bundle.
1560 For GnuTLS, only version 3.0.20 or later.
1562 JH/06 Verification of the server certificate for a TLS connection is now tried
1563 (but not required) by default. The verification status is now logged by
1564 default, for both outbound TLS and client-certificate supplying inbound
1567 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1570 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1571 Status Notification (bounce) messages are now MIME format per RFC 3464.
1572 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1573 under the control of the dsn_advertise_hosts option, and routers may
1574 have a dsn_lasthop option.
1576 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1577 default, modifiable by a malware= option. The list separator for
1578 the options can now be changed in the usual way. Bug 68.
1580 JH/10 The smtp_receive_timeout main option is now expanded before use.
1582 JH/11 The incoming_interface log option now also enables logging of the
1583 local interface on delivery outgoing connections.
1585 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1586 if the interface and destination host and port all match.
1588 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1591 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1592 Patch from Andrew Lewis.
1594 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1595 now supports optional time-restrictions, weighting, and priority
1596 modifiers per server. Patch originally by <rommer@active.by>.
1598 JH/16 The spamd_address main option now supports a mixed list of local
1599 and remote servers. Remote servers can be IPv6 addresses, and
1600 specify a port-range.
1602 JH/17 Bug 68: The spamd_address main option now supports an optional
1603 timeout value per server.
1605 JH/18 Bug 1581: Router and transport options headers_add/remove can
1606 now have the list separator specified.
1608 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1611 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1614 JH/21 Support for the A6 type of dns record is withdrawn.
1616 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1617 rather than the verbs used.
1619 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1620 from 255 to 1024 chars.
1622 JH/24 Verification callouts now attempt to use TLS by default.
1624 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1625 are generic router options now. The defaults didn't change.
1627 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1628 Original patch from Alexander Shikoff, worked over by JH.
1630 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1631 files if ZCAT_COMMAND is not executable.
1633 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1635 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1637 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1638 Normally benign, it bites when the pair was led to by a CNAME;
1639 modern usage is to not canonicalize the domain to a CNAME target
1640 (and we were inconsistent anyway for A-only vs AAAA+A).
1642 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1644 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1645 when evaluating $sender_host_dnssec.
1647 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1648 $sender_helo_dnssec variable.
1650 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1652 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1654 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1656 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1657 documented as working, but never had. Support all but $spam_report.
1659 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1660 added for tls authenticator.
1662 HS/03 Add perl_taintmode main config option
1668 TL/01 When running the test suite, the README says that variables such as
1669 no_msglog_check are global and can be placed anywhere in a specific
1670 test's script, however it was observed that placement needed to be near
1671 the beginning for it to behave that way. Changed the runtest perl
1672 script to read through the entire script once to detect and set these
1673 variables, reset to the beginning of the script, and then run through
1674 the script parsing/test process like normal.
1676 TL/02 The BSD's have an arc4random API. One of the functions to induce
1677 adding randomness was arc4random_stir(), but it has been removed in
1678 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1679 function when detected.
1681 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1682 cause callback expansion.
1684 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1685 syntax errors in an expansion can be treated as a string instead of
1686 logging or causing an error, due to the internal use of bool_lax
1687 instead of bool when processing it.
1689 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1690 server certificates when making smtp deliveries.
1692 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1694 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1696 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1698 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1699 Merged patch from Sebastian Wiedenroth.
1701 JH/05 Fix results-pipe from transport process. Several recipients, combined
1702 with certificate use, exposed issues where response data items split
1703 over buffer boundaries were not parsed properly. This eventually
1704 resulted in duplicates being sent. This issue only became common enough
1705 to notice due to the introduction of connection certificate information,
1706 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1708 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1709 size buffer was used, resulting in syntax errors when an expansion
1712 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1713 version 3.3.6 or later.
1715 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1716 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1717 both become "event_action", the variables become $event_name, $event_data
1718 and $event_defer_errno. There is a new variable $verify_mode, usable in
1719 routers, transports and related events. The tls:cert event is now also
1720 raised for inbound connections, if the main configuration event_action
1723 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1724 early OCSP support, but no stapling (appears to be less than 1.0.0).
1726 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1727 server certificate names available under the smtp transport option
1728 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1731 JH/10 Time-related extraction expansions from certificates now use the main
1732 option "timezone" setting for output formatting, and are consistent
1733 between OpenSSL and GnuTLS compilations. Bug 1541.
1735 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1736 encoded parameter in the incoming message. Bug 1558.
1738 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1739 include certificate info, eximon was claiming there were spoolfile
1742 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1744 JH/14 Log delivery-related information more consistently, using the sequence
1745 "H=<name> [<ip>]" wherever possible.
1747 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1748 are problematic for Debian distribution, omit them from the release
1751 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1753 JH/16 Fix string representation of time values on 64bit time_t architectures.
1756 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1757 output list separator was used.
1762 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1763 checkers that were complaining about end of non-void function with no
1766 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1767 This was a regression introduced in 4.83 by another bugfix.
1769 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1771 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1772 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1778 TF/01 Correctly close the server side of TLS when forking for delivery.
1780 When a message was received over SMTP with TLS, Exim failed to clear up
1781 the incoming connection properly after forking off the child process to
1782 deliver the message. In some situations the subsequent outgoing
1783 delivery connection happened to have the same fd number as the incoming
1784 connection previously had. Exim would try to use TLS and fail, logging
1785 a "Bad file descriptor" error.
1787 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1788 utilities have not been installed.
1790 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1791 temporary space as the ACL may create new global variables.
1793 TL/01 LDAP support uses per connection or global context settings, depending
1794 upon the detected version of the libraries at build time.
1796 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1797 to extract and use the src ip:port in logging and expansions as if it
1798 were a direct connection from the outside internet. PPv2 support was
1799 updated based on HAProxy spec change in May 2014.
1801 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1803 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1804 Properly escape header and check for NULL return.
1806 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1809 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1811 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1812 characters in header names, implemented as a verify condition.
1813 Contributed by Michael Fischer v. Mollard.
1815 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1816 results permerror and temperror. Previous values are deprecated but
1817 still accepted. In a future release, err_perm and err_temp will be
1818 completely removed, which will be a backward incompatibility if the
1819 ACL tests for either of these two old results. Patch contributed by
1820 user bes-internal on the mailing list.
1822 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1824 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1825 selectors, in both main and reject logs.
1827 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1830 JH/07 Add malware type "sock" for talking to simple daemon.
1832 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1834 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1835 routers/transports under cutthrough routing.
1837 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1838 numbers. Touch up "bool" conditional to keep the same definition.
1840 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1842 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1844 JH/12 Expand items in router/transport headers_add or headers_remove lists
1845 individually rather than the list as a whole. Bug 1452.
1847 Required for reasonable handling of multiple headers_ options when
1848 they may be empty; requires that headers_remove items with embedded
1849 colons must have them doubled (or the list-separator changed).
1851 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1852 view the policy declared in the DMARC record. Currently, $dmarc_status
1853 is a combined value of both the record presence and the result of the
1856 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1858 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1859 dnslookup router and the smtp transport (applying to the forward
1862 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1863 of ldap servers used for a specific lookup. Patch provided by Heiko
1866 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1867 New variable $lookup_dnssec_authenticated for observability.
1869 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1870 Patch submitted by Lars Timman.
1872 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1874 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1875 Requires trusted mode and valid format message id, aborts otherwise.
1876 Patch contributed by Heiko Schlichting.
1878 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1879 certextract with support for various fields. Bug 1358.
1881 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1882 is requested by default, modifiable by smtp transport option
1885 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1886 operate on certificate variables to give certificate fingerprints
1887 Also new ${sha256:cert_variable}.
1889 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1891 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1892 Christian Aistleitner.
1894 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1896 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1897 file. Patch from Wolfgang Breyha.
1899 JH/25 Expand the coverage of the delivery $host and $host_address to
1900 client authenticators run in verify callout. Bug 1476.
1902 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1903 align with daemon_smtp_ports. Bug 72.
1905 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1906 support and error reporting did not work properly.
1908 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1909 and is readable. Patch from Andrew Colin Kissa.
1911 TL/14 Enhance documentation of ${run expansion and how it parses the
1912 commandline after expansion, particularly in the case when an
1913 unquoted variable expansion results in an empty value.
1915 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1917 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1918 by renaming away from it. Addresses GH issue 15, reported by
1921 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1923 TL/15 SECURITY: prevent double expansion in math comparison functions
1924 (can expand unsanitized data). Not remotely exploitable.
1931 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1933 PP/02 Make -n do something, by making it not do something.
1934 When combined with -bP, the name of an option is not output.
1936 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1939 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1940 $sender_host_name and config options to manage this, and basic check
1943 PP/05 DSCP support for outbound connections and control modifier for inbound.
1945 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1946 (Only plugin which currently uses this is kerberos4, which nobody should
1947 be using, but we should make it available and other future plugins might
1948 conceivably use it, even though it would break NAT; stuff *should* be
1949 using channel bindings instead).
1951 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1952 name; added for Sendmail compatibility; requires admin caller.
1953 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1954 just ignore it); requires trusted caller.
1955 Also parse but ignore: -Ac -Am -X<logfile>
1958 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1960 TL/02 Add +smtp_confirmation as a default logging option.
1962 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1963 Patch by Magnus Holmgren from 2007-02-20.
1965 TL/04 Bugzilla 1281 - Spec typo.
1966 Bugzilla 1283 - Spec typo.
1967 Bugzilla 1290 - Spec grammar fixes.
1969 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1971 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1973 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1974 mailing list by by Dmitry Isaikin.
1976 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1978 JH/02 Support "G" suffix to numbers in ${if comparisons.
1980 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1982 NM/01 Bugzilla 1197 - Spec typo
1983 Bugzilla 1196 - Spec examples corrections
1985 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1987 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1988 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1991 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1992 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1994 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1995 "acl {{name}{arg}...}", and optional args on acl condition
1998 JH/05 Permit multiple router/transport headers_add/remove lines.
2000 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2002 JH/07 Avoid using a waiting database for a single-message-only transport.
2003 Performance patch from Paul Fisher. Bugzilla 1262.
2005 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2008 JH/09 Add $headers_added variable, with content from use of ACL modifier
2009 add_header (but not yet added to the message). Bugzilla 199.
2011 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2012 Pulled from Bugzilla 817 by Wolfgang Breyha.
2014 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2016 (nb: this is the same fix as in Exim 4.80.1)
2018 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2021 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2024 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2026 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2027 advertise SMTP AUTH mechanism to us, instead of a generic
2028 protocol violation error. Also, make Exim more robust to bad
2029 data from the Dovecot auth socket.
2031 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2033 When a queue runner is handling a message, Exim first routes the
2034 recipient addresses, during which it prunes them based on the retry
2035 hints database. After that it attempts to deliver the message to
2036 any remaining recipients. It then updates the hints database using
2039 So if a recipient address works intermittently, it can get repeatedly
2040 deferred at routing time. The retry hints record remains fresh so the
2041 address never reaches the final cutoff time.
2043 This is a fairly common occurrence when a user is bumping up against
2044 their storage quota. Exim had some logic in its local delivery code
2045 to deal with this. However it did not apply to per-recipient defers
2046 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2048 This change adds a proper retry rule check during routing so that the
2049 final cutoff time is checked against the message's age. We only do
2050 this check if there is an address retry record and there is not a
2051 domain retry record; this implies that previous attempts to handle
2052 the address had the retry_use_local_parts option turned on. We use
2053 this as an approximation for the destination being like a local
2054 delivery, as in LMTP.
2056 I suspect this new check makes the old local delivery cutoff check
2057 redundant, but I have not verified this so I left the code in place.
2059 TF/02 Correct gecos expansion when From: is a prefix of the username.
2061 Test 0254 submits a message to Exim with the header
2065 When I ran the test suite under the user fanf2, Exim expanded
2066 the header to contain my full name, whereas it should have added
2067 a Resent-Sender: header. It erroneously treats any prefix of the
2068 username as equal to the username.
2070 This change corrects that bug.
2072 GF/01 DCC debug and logging tidyup
2073 Error conditions log to paniclog rather than rejectlog.
2074 Debug lines prefixed by "DCC: " to remove any ambiguity.
2076 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2078 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2079 Bug spotted by Jeremy Harris; was flawed since initial commit.
2080 Would have resulted in OCSP responses post-SNI triggering an Exim
2081 NULL dereference and crash.
2083 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2085 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2086 Bug detection, analysis and fix by Samuel Thibault.
2087 Bugzilla 1331, Debian bug #698092.
2089 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2091 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2092 Server implementation by Todd Lyons, client by JH.
2093 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2094 config variable "prdr_enable" controls whether the server
2095 advertises the facility. If the client requests PRDR a new
2096 acl_data_smtp_prdr ACL is called once for each recipient, after
2097 the body content is received and before the acl_smtp_data ACL.
2098 The client is controlled by both of: a hosts_try_prdr option
2099 on the smtp transport, and the server advertisement.
2100 Default client logging of deliveries and rejections involving
2101 PRDR are flagged with the string "PRDR".
2103 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2104 fclose(). Diagnosis by Todd Lyons.
2106 PP/17 Update configure.default to handle IPv6 localhost better.
2107 Patch by Alain Williams (plus minor tweaks).
2110 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2111 This is now consistent with GnuTLS, and is now documented: the
2112 previous undocumented portable approach to treating the option as
2113 unset was to force an expansion failure. That still works, and
2114 an empty string is now equivalent.
2116 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2117 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2118 not performing validation itself.
2120 PP/20 Added force_command boolean option to pipe transport.
2121 Patch from Nick Koston, of cPanel Inc.
2123 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2126 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2128 PP/21 Fix eximon continuous updating with timestamped log-files.
2129 Broken in a format-string cleanup in 4.80, missed when I repaired the
2130 other false fix of the same issue.
2131 Report and fix from Heiko Schlichting.
2134 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2135 Report from Prashanth Katuri.
2137 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2138 It's SecureTransport, so affects any MacOS clients which use the
2139 system-integrated TLS libraries, including email clients.
2141 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2142 using a MIME ACL for non-SMTP local injection.
2143 Report and assistance in diagnosis by Warren Baker.
2145 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2147 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2149 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2150 last id that failed so it may be referenced in subsequent ACL's.
2152 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2155 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2156 ldap library initialization, allowing self-signed CA's to be
2157 used. Also properly sets require_cert option later in code by
2158 using NULL (global ldap config) instead of ldap handle (per
2159 session). Bug diagnosis and testing by alxgomz.
2161 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2162 the src/util/ subdirectory.
2164 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2165 renamed to Transport Post Delivery Action by Jeremy Harris, as
2168 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2169 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2170 redis_servers = needs to be configured which will be used by the redis
2171 lookup. Patch from Warren Baker, of The Packet Hub.
2173 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2175 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2176 hostname or reverse DNS when processing a host list. Used suggestions
2177 from multiple comments on this bug.
2179 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2181 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2182 Missed a few lines, added it to make the runtest require no keyboard
2185 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2186 contains upper case chars. Make router use caseful_local_part.
2188 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2189 support when GnuTLS has been built with p11-kit.
2195 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2197 This, or similar/improved, will also be change PP/11 of 4.82.
2203 PP/01 Handle short writes when writing local log-files.
2204 In practice, only affects FreeBSD (8 onwards).
2205 Bugzilla 1053, with thanks to Dmitry Isaikin.
2207 NM/01 Bugzilla 949 - Documentation tweak
2209 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2212 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2214 PP/02 Implemented gsasl authenticator.
2216 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2218 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2219 `pkg-config foo` for cflags/libs.
2221 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2222 with rest of GSASL and with heimdal_gssapi.
2224 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2225 `pkg-config foo` for cflags/libs for the TLS implementation.
2227 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2228 properties get this fed in as external SSF. A number of robustness
2229 and debugging improvements to the cyrus_sasl authenticator.
2231 PP/08 cyrus_sasl server now expands the server_realm option.
2233 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2234 Patch by Jeremy Harris.
2236 PP/10 Added dbmjz lookup type.
2238 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2240 PP/12 MAIL args handles TAB as well as SP, for better interop with
2241 non-compliant senders.
2242 Analysis and variant patch by Todd Lyons.
2244 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2245 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2246 Patch from Dirk Mueller <dmueller@suse.com>
2248 PP/13 tls_peerdn now print-escaped for spool files.
2249 Observed some $tls_peerdn in wild which contained \n, which resulted
2250 in spool file corruption.
2252 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2253 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2254 or write after TLS renegotiation, which otherwise led to messages
2257 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2258 as a tracking header (ie: a signed header comes before the signature).
2259 Patch from Wolfgang Breyha.
2261 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2262 comma-sep list; embedded commas doubled.
2264 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2266 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2268 Report and patch from Dmitry Banschikov.
2270 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2271 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2272 failures. We appear to now support TLS1.1+ with Exim.
2274 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2275 lets Exim select keys and certificates based upon TLS SNI from client.
2276 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2277 before an outbound SMTP session. New log_selector, +tls_sni.
2279 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2280 NULL dereference. Report and patch from Alun Jones.
2282 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2283 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2284 Not seeing resolver debug output on NetBSD, but suspect this is a
2285 resolver implementation change.
2287 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2288 Left warnings. Added "eximon gdb" invocation mode.
2290 PP/21 Defaulting "accept_8bitmime" to true, not false.
2292 PP/22 Added -bw for inetd wait mode support.
2294 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2295 locate the relevant includes and libraries. Made this the default.
2297 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2298 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2300 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2301 This may cause build issues on older platforms.
2303 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2304 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2305 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2306 Added SNI support via GnuTLS too.
2307 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2309 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2311 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2312 Applied second patch from Janne, implementing suggestion to default
2313 multiple-strings-in-record handling to match SPF spec.
2315 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2317 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2318 read-only, out of scope).
2319 Patch from Wolfgang Breyha, report from Stuart Northfield.
2321 PP/29 Fix three issues highlighted by clang analyser static analysis.
2322 Only crash-plausible issue would require the Cambridge-specific
2323 iplookup router and a misconfiguration.
2324 Report from Marcin Mirosław.
2326 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2328 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2329 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2330 As part of this, removing so much warning spew let me fix some minor
2331 real issues in debug logging.
2333 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2334 assignment on my part. Fixed.
2336 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2337 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2338 Janne Snabb (who went above and beyond: thank you).
2340 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2341 string otherwise requires a connection and a bunch more work and it's
2342 relatively easy to get wrong. Should also expose TLS library linkage
2345 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2346 64-bit ${eval} (JH/03).
2348 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2349 GNU libc to support some of the 64-bit stuff, should not lead to
2350 conflicts. Defined before os.h is pulled in, so if a given platform
2351 needs to override this, it can.
2353 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2354 protection layer was required, which is not implemented.
2355 Bugzilla 1254, patch from Wolfgang Breyha.
2357 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2358 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2359 tls_dhparam take prime identifiers. Also unbreak combination of
2360 OpenSSL+DH_params+TLSSNI.
2362 PP/39 Disable SSLv2 by default in OpenSSL support.
2368 PP/01 Solaris build fix for Oracle's LDAP libraries.
2369 Bugzilla 1109, patch from Stephen Usher.
2371 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2373 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2376 TF/02 Fix a couple more cases where we did not log the error message
2377 when unlink() failed. See also change 4.74-TF/03.
2379 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2380 lock up or crash if it happened to be inside a call to libc when it
2381 got a SIGUSR1 from exiwhat.
2383 The SIGUSR1 handler appends the current process status to the process
2384 log which is later printed by exiwhat. It used to use the general
2385 purpose logging code to do this, but several functions it calls are
2386 not safe for signals.
2388 The new output code in the SIGUSR1 handler is specific to the process
2389 log, and simple enough that it's easy to inspect for signal safety.
2390 Removing some special cases also simplifies the general logging code.
2391 Removing the spurious timestamps from the process log simplifies
2394 TF/04 Improved ratelimit ACL condition.
2396 The /noupdate option has been deprecated in favour of /readonly which
2397 has clearer semantics. The /leaky, /strict, and /readonly update modes
2398 are mutually exclusive. The update mode is no longer included in the
2399 database key; it just determines when the database is updated. (This
2400 means that when you upgrade Exim will forget old rate measurements.)
2402 Exim now checks that the per_* options are used with an update mode that
2403 makes sense for the current ACL. For example, when Exim is processing a
2404 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2405 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2406 must specify per_mail/readonly. If you omit the update mode it defaults to
2407 /leaky where that makes sense (as before) or /readonly where required.
2409 The /noupdate option is now undocumented but still supported for
2410 backwards compatibility. It is equivalent to /readonly except that in
2411 ACLs where /readonly is required you may specify /leaky/noupdate or
2412 /strict/noupdate which are treated the same as /readonly.
2414 A useful new feature is the /count= option. This is a generalization
2415 of the per_byte option, so that you can measure the throughput of other
2416 aggregate values. For example, the per_byte option is now equivalent
2417 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2419 The per_rcpt option has been generalized using the /count= mechanism
2420 (though it's more complicated than the per_byte equivalence). When it is
2421 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2422 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2423 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2424 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2425 Note that using per_rcpt with a non-readonly update mode in more than
2426 one ACL will cause the recipients to be double-counted. (The per_mail
2427 and per_byte options don't have this problem.)
2429 The handling of very low rates has changed slightly. If the computed rate
2430 is less than the event's count (usually one) then this event is the first
2431 after a long gap. In this case the rate is set to the same as this event's
2432 count, so that the first message of a spam run is counted properly.
2434 The major new feature is a mechanism for counting the rate of unique
2435 events. The new per_addr option counts the number of different
2436 recipients that someone has sent messages to in the last time period. It
2437 behaves like per_rcpt if all the recipient addresses are different, but
2438 duplicate recipient addresses do not increase the measured rate. Like
2439 the /count= option this is a general mechanism, so the per_addr option
2440 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2441 example, measure the rate that a client uses different sender addresses
2442 with the options per_mail/unique=$sender_address. There are further
2443 details in the main documentation.
2445 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2447 TF/06 Removed a few PCRE remnants.
2449 TF/07 Automatically extract Exim's version number from tags in the git
2450 repository when doing development or release builds.
2452 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2453 Bugzilla 879. Patch from Paul Fisher.
2455 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2456 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2459 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2461 PP/05 Variable $av_failed, true if the AV scanner deferred.
2462 Bugzilla 1078. Patch from John Horne.
2464 PP/06 Stop make process more reliably on build failure.
2465 Bugzilla 1087. Patch from Heiko Schlittermann.
2467 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2468 Bugzilla 1089. Patch from Heiko Schlittermann.
2470 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2471 Bugzilla 1131. Patch from Holger Weiß.
2473 PP/09 Handle IPv6 addresses with SPF.
2474 Bugzilla 860. Patch from Wolfgang Breyha.
2476 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2478 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2481 PP/11 match_* no longer expand right-hand-side by default.
2482 New compile-time build option, EXPAND_LISTMATCH_RHS.
2483 New expansion conditions, "inlist", "inlisti".
2485 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2487 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2489 PP/14 fix log_write() format string regression from TF/03.
2490 Bugzilla 1152. Patch from Dmitry Isaikin.
2496 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2498 PP/02 Harmonised TLS library version reporting; only show if debugging.
2499 Layout now matches that introduced for other libraries in 4.74 PP/03.
2501 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2503 PP/04 New "dns_use_edns0" global option.
2505 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2508 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2509 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2511 TK/01 Updated PolarSSL code to 0.14.2.
2512 Bugzilla 1097. Patch from Andreas Metzler.
2514 PP/07 Catch divide-by-zero in ${eval:...}.
2515 Fixes bugzilla 1102.
2517 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2520 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2521 format-string attack -- SECURITY: remote arbitrary code execution.
2523 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2524 time unintentionally subject to list matching rules, letting the header
2525 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2526 arbitrary string expansion). This allowed for information disclosure.
2528 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2529 INT_MIN/-1 -- value coerced to INT_MAX.
2535 NM/01 Workaround for PCRE version dependency in version reporting
2538 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2539 This fixes portability to compilers other than gcc, notably
2540 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2542 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2543 makefiles for portability to HP-UX and POSIX correctness.
2545 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2546 Also via indented variable definition in the Makefile.
2547 (Debugging by Oliver Heesakkers).
2549 PP/02 Restore caching of spamd results with expanded spamd_address.
2550 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2552 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2553 Improves build reliability. Fix from: Frank Elsner
2555 NM/02 Fix wide character breakage in the rfc2047 coding
2556 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2558 NM/03 Allow underscore in dnslist lookups
2559 Fixes bug 1026. Patch from Graeme Fowler
2561 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2562 Code patches from Adam Ciarcinski of NetBSD.
2564 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2567 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2568 is logged, to avoid truncation. Patch from John Horne.
2570 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2571 Patch from Jakob Hirsch.
2573 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2574 SQL string expansion failure details.
2575 Patch from Andrey Oktyabrski.
2577 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2578 Patch from Simon Arlott.
2580 PP/09 New lookups functionality failed to compile on old gcc which rejects
2581 extern declarations in function scope.
2582 Patch from Oliver Fleischmann
2584 PP/10 Use sig_atomic_t for flags set from signal handlers.
2585 Check getgroups() return and improve debugging.
2586 Fixed developed for diagnosis in bug 927 (which turned out to be
2589 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2590 Patch from Mark Zealey.
2592 PP/12 Bugzilla 1056: Improved spamd server selection.
2593 Patch from Mark Zealey.
2595 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2596 Based on patch from Heiko Schlittermann.
2598 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2599 Patch from Uwe Doering, sign-off by Michael Haardt.
2601 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2602 variable declaration deep within a block. Bug and patch from
2605 PP/15 lookups-Makefile IRIX compatibility coercion.
2607 PP/16 Make DISABLE_DKIM build knob functional.
2609 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2610 Patch by Simon Arlott
2612 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2613 variable argument macros. Our copy now differs from upstream.
2619 TF/01 Failure to get a lock on a hints database can have serious
2620 consequences so log it to the panic log.
2622 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2623 controlled using the smtp_confirmation log selector.
2625 TF/03 Include the error message when we fail to unlink a spool file.
2627 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2628 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2629 for maintaining out-of-tree patches for some time.
2631 PP/01 Bugzilla 139: Documentation and portability issues.
2632 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2633 Handle per-OS dynamic-module compilation flags.
2635 PP/02 Let /dev/null have normal permissions.
2636 The 4.73 fixes were a little too stringent and complained about the
2637 permissions on /dev/null. Exempt it from some checks.
2638 Reported by Andreas M. Kirchwitz.
2640 PP/03 Report version information for many libraries, including
2641 Exim version information for dynamically loaded libraries. Created
2642 version.h, now support a version extension string for distributors
2643 who patch heavily. Dynamic module ABI change.
2645 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2646 privilege escalation vulnerability whereby the Exim run-time user
2647 can cause root to append content of the attacker's choosing to
2650 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2653 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2654 If dropping privileges for untrusted macros, we disabled normal logging
2655 on the basis that it would fail; for the Exim run-time user, this is not
2656 the case, and it resulted in successful deliveries going unlogged.
2657 Fixed. Reported by Andreas Metzler.
2663 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2664 only prepend for the Resent-* case. Fixes regression introduced in
2665 Exim 4.70 by NM/22 for Bugzilla 607.
2667 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2668 increasing numbers of administrators be bitten by this.
2670 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2672 PP/03 Bugzilla 994: added openssl_options main configuration option.
2674 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2676 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2678 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2680 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2681 without a peer certificate, leading to a segfault because of an
2682 assumption that peers always have certificates. Be a little more
2683 paranoid. Problem reported by Martin Tscholak.
2685 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2686 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2687 NB: ClamAV planning to remove STREAM in "middle of 2010".
2688 CL also introduces -bmalware, various -d+acl logging additions and
2689 more caution in buffer sizes.
2691 PP/09 Implemented reverse_ip expansion operator.
2693 PP/10 Bugzilla 937: provide a "debug" ACL control.
2695 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2697 PP/12 Bugzilla 973: Implement --version.
2699 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2701 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2703 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2705 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2706 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2707 ignore trailing whitespace.
2709 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2711 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2714 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2715 Notification from Dr Andrew Aitchison.
2717 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2718 ExtendedDetectionInfo response format.
2719 Notification from John Horne.
2721 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2724 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2725 XSL and documented dependency on system catalogs, with examples of how
2728 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2731 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2732 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2733 configuration file which is writeable by the Exim user or group.
2735 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2736 of configuration files to cover files specified with the -C option if
2737 they are going to be used with root privileges, not just the default
2740 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2741 option (effectively making it always true).
2743 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2744 files to be used while preserving root privileges.
2746 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2747 that rogue child processes cannot use them.
2749 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2750 run-time user, instead of root.
2752 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2753 Exim run-time user without dropping privileges.
2755 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2756 result string, instead of calling string_vformat() twice with the same
2759 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2760 for other users. Others should always drop root privileges if they use
2761 -C on the command line, even for a whitelisted configure file.
2763 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2765 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2771 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2772 $data_path, and $header_path variables; fixed documentation bugs and
2775 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2776 exipick to access non-standard spools, including the "frozen" queue
2779 NM/01 Bugzilla 965: Support mysql stored procedures.
2780 Patch from Alain Williams
2782 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2784 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2785 Patch from Andreas Metzler
2787 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2788 Patch from Kirill Miazine
2790 NM/05 Bugzilla 671: Added umask to procmail example.
2792 JJ/03 installed exipick 20100323.0, fixing doc bug
2794 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2795 directory. Notification and patch from Dan Rosenberg.
2797 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2799 TK/02 Improve log output when DKIM signing operation fails.
2801 MH/01 Treat the transport option dkim_domain as a colon separated
2802 list, not as a single string, and sign the message with each element,
2803 omitting multiple occurences of the same signer.
2805 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2806 Bugzilla 985, 986. Patch by Simon Arlott
2808 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2809 Patch by Simon Arlott
2811 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2812 MBX locking. Notification from Dan Rosenberg.
2818 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2820 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2822 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2824 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2826 NM/04 Bugzilla 915: Flag broken perl installation during build.
2832 TK/01 Added patch by Johannes Berg that expands the main option
2833 "spamd_address" if it starts with a dollar sign.
2835 TK/02 Write list of recipients to X-Envelope-Sender header when building
2836 the mbox-format spool file for content scanning (suggested by Jakob
2839 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2840 (http://www.dcc-servers.net/) support via dccifd. Activated by
2841 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2843 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2844 by Mark Daniel Reidel <mr@df.eu>.
2846 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2847 When building exim an external PCRE library is now needed -
2848 PCRE is a system library on the majority of modern systems.
2849 See entry on PCRE_LIBS in EDITME file.
2851 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2852 conversation. Added nologin parameter to request.
2853 Patch contributed by Kirill Miazine.
2855 TF/01 Do not log submission mode rewrites if they do not change the address.
2857 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2859 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2860 log files in place. Contributed by Roberto Lima.
2862 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2864 TF/03 Bugzilla 615: When checking the local_parts router precondition
2865 after a local_part_suffix or local_part_prefix option, Exim now
2866 does not use the address's named list lookup cache, since this
2867 contains cached lookups for the whole local part.
2869 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2870 Robert Millan. Documentation is in experimental-spec.txt.
2872 TF/04 Bugzilla 668: Fix parallel build (make -j).
2874 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2876 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2877 Patch provided by Jan Srzednicki.
2879 TF/05 Leading white space used to be stripped from $spam_report which
2880 wrecked the formatting. Now it is preserved.
2882 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2883 that they are available at delivery time.
2885 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2887 TF/08 TLS error reporting now respects the incoming_interface and
2888 incoming_port log selectors.
2890 TF/09 Produce a more useful error message if an SMTP transport's hosts
2891 setting expands to an empty string.
2893 NM/06 Bugzilla 744: EXPN did not work under TLS.
2894 Patch provided by Phil Pennock.
2896 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2897 Patch provided by Richard Godbee.
2899 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2900 acl_smtp_notquit, added index entry.
2902 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2903 Patch provided by Eugene Bujak.
2905 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2906 accept(). Patch provided by Maxim Dounin.
2908 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2909 Patch provided by Phil Pennock.
2911 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2913 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2914 Patch provided by Brad "anomie" Jorsch.
2916 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2917 Patch provided by Dean Brooks.
2919 TK/05 Add native DKIM support (does not depend on external libraries).
2921 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2922 Patch provided by Graeme Fowler.
2924 NM/16 Bugzilla 851: Documentation example syntax fix.
2926 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2928 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2931 NM/19 Bugzilla 745: TLS version reporting.
2932 Patch provided by Phil Pennock.
2934 NM/20 Bugzilla 167: bool: condition support.
2935 Patch provided by Phil Pennock.
2937 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2938 clients. Patch provided by Phil Pennock.
2940 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2941 Patch provided by Brad "anomie" Jorsch.
2943 NM/23 Bugzilla 687: Fix misparses in eximstats.
2944 Patch provided by Heiko Schlittermann.
2946 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2947 Patch provided by Heiko Schlittermann.
2949 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2950 plus update to original patch.
2952 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2954 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2955 Patch provided by David Brownlee.
2957 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2959 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2961 NM/30 Bugzilla 888: TLS documentation bugfixes.
2963 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2965 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2966 Unlike the original bugzilla I have changed all shell scripts in src tree.
2968 NM/33 Bugzilla 898: Transport filter timeout fix.
2969 Patch by Todd Rinaldo.
2971 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2972 Patch by Serge Demonchaux.
2974 NM/35 Bugzilla 39: Base64 decode bug fixes.
2975 Patch by Jakob Hirsch.
2977 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2979 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2981 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2983 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2989 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2990 ALT-N's libdkim that I have put here:
2991 http://duncanthrax.net/exim-experimental/
2993 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2994 were called 'true' and it seems that C99 defines that as a reserved
2995 keyword to be used with 'bool' variable types. That means you could
2996 not include C99-style headers which use bools without triggering
2997 build errors in sieve.c.
2999 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3000 as mailq or other aliases. Changed the --help handling significantly
3001 to do whats expected. exim_usage() emits usage/help information.
3003 SC/01 Added the -bylocaldomain option to eximstats.
3005 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3007 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3009 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3015 PH/01 Another patch from the Sieve maintainer.
3017 PH/02 When an IPv6 address is converted to a string for single-key lookup
3018 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3019 dots are used instead of colons so that keys in lsearch files need not
3020 contain colons. This was done some time before quoting was made available
3021 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3022 (notated using the quote facility) so as to distinguish them from IPv4
3023 keys. This meant that lookups for IP addresses in host lists did not work
3024 for iplsearch lookups.
3026 This has been fixed by arranging for IPv6 addresses to be expressed with
3027 colons if the lookup type is iplsearch. This is not incompatible, because
3028 previously such lookups could never work.
3030 The situation is now rather anomalous, since one *can* have colons in
3031 ordinary lsearch keys. However, making the change in all cases is
3032 incompatible and would probably break a number of configurations.
3034 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3037 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3038 conversion specification without a maximum field width, thereby enabling
3039 a rogue spamd server to cause a buffer overflow. While nobody in their
3040 right mind would setup Exim to query an untrusted spamd server, an
3041 attacker that gains access to a server running spamd could potentially
3042 exploit this vulnerability to run arbitrary code as the Exim user.
3044 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3045 $primary_hostname instead of what libspf2 thinks the hosts name is.
3047 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3048 a directory entry by the name of the lookup key. Previously, if a
3049 symlink pointed to a non-existing file or a file in a directory that
3050 Exim lacked permissions to read, a lookup for a key matching that
3051 symlink would fail. Now it is enough that a matching directory entry
3052 exists, symlink or not. (Bugzilla 503.)
3054 PH/03 The body_linecount and body_zerocount variables are now exported in the
3057 PH/04 Added the $dnslist_matched variable.
3059 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3060 This means they are set thereafter only if the connection becomes
3063 PH/06 Added the client_condition to authenticators so that some can be skipped
3064 by clients under certain conditions.
3066 PH/07 The error message for a badly-placed control=no_multiline_responses left
3067 "_responses" off the end of the name.
3069 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3071 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3072 (without spaces) instead of just copying the configuration text.
3074 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3076 PH/11 Added $max_received_linelength.
3078 PH/12 Added +ignore_defer and +include_defer to host lists.
3080 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3081 way in which PCRE > 7.0 is built.
3083 PH/14 Implemented queue_only_load_latch.
3085 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3086 MAIL command. The effect was to mangle the value on 64-bit systems.
3088 PH/16 Another patch from the Sieve maintainer.
3090 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3092 PH/18 If a system quota error occurred while trying to create the file for
3093 a maildir delivery, the message "Mailbox is full" was not appended to the
3094 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3095 only to a quota excession during the actual writing of the file.
3097 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3098 characters?) which causes problems in log lines. The DN values are now
3099 passed through string_printing() before being added to log lines.
3101 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3102 and InterBase are left for another time.)
3104 PH/21 Added message_body_newlines option.
3106 PH/22 Guard against possible overflow in moan_check_errorcopy().
3108 PH/23 POSIX allows open() to be a macro; guard against that.
3110 PH/24 If the recipient of an error message contained an @ in the local part
3111 (suitably quoted, of course), incorrect values were put in $domain and
3112 $local_part during the evaluation of errors_copy.
3118 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3119 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3122 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3123 issue a MAIL command.
3125 PH/02 In an ACL statement such as
3127 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3129 if a client was not listed at all, or was listed with a value other than
3130 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3131 the condition was not true (as it should be), so access was not denied.
3132 The bug was that the ! inversion was incorrectly passed on to the second
3133 item. This has been fixed.
3135 PH/03 Added additional dnslists conditions == and =& which are different from
3136 = and & when the dns lookup returns more than one IP address.
3138 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3139 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3141 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3142 FSYNC, which compiles an option called disable_fsync that allows for
3143 bypassing fsync(). The documentation is heavily laced with warnings.
3145 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3147 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3148 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3149 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3150 including adding "make clean"; (3) Added -fPIC when compiling the test
3151 dynamically loaded module, to get rid of a warning.
3153 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3154 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3155 = 0s. The bug is otherwise harmless.
3157 PH/07 There was a bug in the dovecot authenticator such that the value of
3158 $auth1 could be overwritten, and so not correctly preserved, after a
3159 successful authentication. This usually meant that the value preserved by
3160 the server_setid option was incorrect.
3162 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3164 PH/09 Installed PCRE release 7.0.
3166 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3167 run for batched SMTP input. It is now run at the start of every message
3168 in the batch. While fixing this I discovered that the process information
3169 (output by running exiwhat) was not always getting set for -bs and -bS
3170 input. This is fixed, and it now also says "batched" for BSMTP.
3172 PH/11 Added control=no_pipelining.
3174 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3175 patch, slightly modified), and move the expansion of helo_data till after
3176 the connection is made in the smtp transport (so it can use these
3179 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3181 PH/14 Added log_selector = +pid.
3183 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3185 PH/16 Add ${if forany and ${if forall.
3187 PH/17 Added dsn_from option to vary the From: line in DSNs.
3189 PH/18 Flush SMTP output before performing a callout, unless control =
3190 no_callout_flush is set.
3192 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3193 was true (the default) a successful delivery failed to delete the retry
3194 item, thus causing premature timeout of the address. The bug is now
3197 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3199 PH/21 Long custom messages for fakedefer and fakereject are now split up
3200 into multiline responses in the same way that messages for "deny" and
3201 other ACL rejections are.
3203 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3204 with slight modification.
3206 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3207 draft, changing the syntax and factoring some duplicate code".
3209 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3210 for deliveries of the second and subsequent messages over the same SMTP
3213 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3214 ${reduce, with only minor "tidies".
3216 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3218 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3219 expansion side effects.
3221 PH/27 When a message times out after an over-quota error from an Exim-imposed
3222 quota, the bounce message says "mailbox is full". This message was not
3223 being given when it was a system quota that was exceeded. It now should
3226 MH/03 Made $recipients available in local_scan(). local_scan() already has
3227 better access to the recipient list through recipients_list[], but
3228 $recipients can be useful in postmaster-provided expansion strings.
3230 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3231 in the case of a MAIL command with additional options following the
3232 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3233 were accidentally chopped off.
3235 PH/29 SMTP synchronization checks are implemented when a command is read -
3236 there is a check that no more input is waiting when there shouldn't be
3237 any. However, for some commands, a delay in an ACL can mean that it is
3238 some time before the response is written. In this time, more input might
3239 arrive, invalidly. So now there are extra checks after an ACL has run for
3240 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3241 pipelining has not been advertised.
3243 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3245 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3246 returned in the SMTP response when smtp_return_error_details was false.
3247 This has been fixed.
3249 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3250 instead of the C I/O that was originally supplied, because problems were
3251 reported on Solaris.
3253 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3254 Exim which did not show up earlier: it was assuming that a call to
3255 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3256 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3257 was a macro that became an assignment, so it seemed to work. This has
3258 changed to a proper function call with a void return, hence the compile
3259 error. Exim's code has been fixed.
3261 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3264 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3266 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3268 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3269 because it turns out to be too big or there is a timeout) there is no
3270 "Completed" line in the log. When some messages of this type were
3271 selected by exigrep, they were listed as "not completed". Others were
3272 picked up by some special patterns. I have improved the selection
3273 criteria to be more general.
3275 PH/38 The host_find_failed option in the manualroute router can now be set
3276 to "ignore", to completely ignore a host whose IP address cannot be
3277 found. If all hosts are ignored, the behaviour is controlled by the new
3278 host_all_ignored option.
3280 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3281 homing or because of multiple MX records with /mx) generated more than
3282 one IP address, and the following item turned out to be the local host,
3283 all the secondary addresses of the first item were incorrectly removed
3284 from the list, along with the local host and any following hosts (which
3285 is what is supposed to happen).
3287 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3288 whoever called Exim into the -H file. In the case of the daemon it was
3289 behaving confusingly. When first started, it used values for whoever
3290 started the daemon, but after a SIGHUP it used the Exim user (because it
3291 calls itself on a restart). I have changed the code so that it now always
3294 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3295 message are rejected with the same error (e.g. no authentication or bad
3296 sender address), and a DATA command is nevertheless sent (as can happen
3297 with PIPELINING or a stupid MUA), the error message that was given to the
3298 RCPT commands is included in the rejection of the DATA command. This is
3299 intended to be helpful for MUAs that show only the final error to their
3302 PH/42 Another patch from the Sieve maintainer.
3304 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3305 Eximstats - Fixed some broken HTML links and added missing column headers
3307 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3308 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3310 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3312 PH/43 Yet another patch from the Sieve maintainer.
3314 PH/44 I found a way to check for a TCP/IP connection going away before sending
3315 the response to the final '.' that terminates a message, but only in the
3316 case where the client has not sent further data following the '.'
3317 (unfortunately, this is allowed). However, in many cases there won't be
3318 any further data because there won't be any more messages to send. A call
3319 to select() can be used: if it shows that the input is "ready", there is
3320 either input waiting, or the socket has been closed. An attempt to read
3321 the next input character can distinguish the two cases. Previously, Exim
3322 would have sent an OK response which the client would never have see.
3323 This could lead to message repetition. This fix should cure that, at
3324 least in a lot of common cases.
3326 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3327 advertised in response to EHLO.
3333 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3334 fixed by 4.65/MH/01 (is this a record?) are fixed:
3336 (i) An empty string was always treated as zero by the numeric comparison
3337 operators. This behaviour has been restored.
3339 (ii) It is documented that the numeric comparison operators always treat
3340 their arguments as decimal numbers. This was broken in that numbers
3341 starting with 0 were being interpreted as octal.
3343 While fixing these problems I realized that there was another issue that
3344 hadn't been noticed. Values of message_size_limit (both the global option
3345 and the transport option) were treated as octal if they started with 0.
3346 The documentation was vague. These values are now always treated as
3347 decimal, and I will make that clear in the documentation.
3353 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3354 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3357 MH/01 Don't check that the operands of numeric comparison operators are
3358 integers when their expansion is in "skipping" mode (fixes bug
3359 introduced by 4.64-PH/07).
3361 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3362 child addresses, Exim now panics and dies. Previously, because the count
3363 is held in a short int, deliveries were likely to be lost. As such a
3364 large number of recipients for a single message is ridiculous
3365 (performance will be very, very poor), I have chosen to impose a limit
3366 rather than extend the field.
3372 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3373 leftover -K file (the existence of which was triggered by #402).
3374 While we were at it, introduced process PID as part of the -K
3375 filename. This should rule out race conditions when creating
3378 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3379 processing considerably. Previous code took too long for large mails,
3380 triggering a timeout which in turn triggers #401.
3382 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3383 in the DK code in transports.c. sendfile() is not really portable,
3384 hence the _LINUX specificness.
3386 TF/01 In the add_headers option to the mail command in an Exim filter,
3387 there was a bug that Exim would claim a syntax error in any
3388 header after the first one which had an odd number of characters
3391 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3392 callout verification, Exim cached a "reject" for the entire domain. This
3393 is correct for most verifications, but it is not correct for a recipient
3394 verification with use_sender or use_postmaster set, because in that case
3395 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3396 case of MAIL FROM:<> rejection from other early rejections (e.g.
3397 rejection of HELO). When verifying a recipient using a non-null MAIL
3398 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3399 Whatever the result of the callout, the value of the domain cache is
3400 left unchanged (for any other kind of callout, getting as far as trying
3401 RCPT means that the domain itself is ok).
3403 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3406 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3407 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3408 session, the daemon ignores ECONNECT errors and logs others; it now
3409 ignores EPIPE as well.
3411 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3412 (quoted-printable decoding).
3414 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3415 later the small subsequent patch to fix an introduced bug.
3417 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3419 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3421 PH/08 An error is now given if message_size_limit is specified negative.
3423 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3424 to be given (somewhat) arbitrary names.
3426 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3429 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3430 miscellaneous code fixes
3432 PH/10 Added the log_reject_target ACL modifier to specify where to log
3435 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3436 hostname. This is wrong, because it relates to the incoming message (and
3437 probably the interface on which it is arriving) and not to the outgoing
3438 callout (which could be using a different interface). This has been
3439 changed to use the value of the helo_data option from the smtp transport
3440 instead - this is what is used when a message is actually being sent. If
3441 there is no remote transport (possible with a router that sets up host
3442 addresses), $smtp_active_hostname is used.
3444 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3445 tweaks were necessary in order to get it to work (see also 21 below):
3446 (a) The code assumed that strncpy() returns a negative number on buffer
3447 overflow, which isn't the case. Replaced with Exim's string_format()
3449 (b) There were several signed/unsigned issues. I just did the minimum
3450 hacking in of casts. There is scope for a larger refactoring.
3451 (c) The code used strcasecmp() which is not a standard C function.
3452 Replaced with Exim's strcmpic() function.
3453 (d) The code set only $1; it now sets $auth1 as well.
3454 (e) A simple test gave the error "authentication client didn't specify
3455 service in request". It would seem that Dovecot has changed its
3456 interface. Fortunately there's a specification; I followed it and
3457 changed what the client sends and it appears to be working now.
3459 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3462 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3463 address A is aliased to B and C, where B exists and C does not. Without
3464 -v the output is "A verified" because verification stops after a
3465 successful redirection if more than one address is generated. However,
3466 with -v the child addresses are also verified. Exim was outputting "A
3467 failed to verify" and then showing the successful verification for C,
3468 with its parentage. It now outputs "B failed to verify", showing B's
3469 parentage before showing the successful verification of C.
3471 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3472 look up a TXT record in a specific list after matching in a combined
3475 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3476 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3477 they consult the DNS. I had assumed they would set it the way they
3478 wanted; and indeed my experiments on Linux seem to show that in some
3479 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3480 To be on the safe side, however, I have now made the interface to
3481 host_find_byname() similar to host_find_bydns(), with an argument
3482 containing the DNS resolver options. The host_find_byname() function now
3483 sets these options at its start, just as host_find_bydns() does. The smtp
3484 transport options dns_qualify_single and dns_search_parents are passed to
3485 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3486 of host_find_byname() use the default settings of RES_DEFNAMES
3487 (qualify_single) but not RES_DNSRCH (search_parents).
3489 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3490 spool_read_header() do less string testing, by means of a preliminary
3491 switch on the second character of optional "-foo" lines. (This is
3492 overdue, caused by the large number of possibilities that now exist.
3493 Originally there were few.) While I was there, I also converted the
3494 str(n)cmp tests so they don't re-test the leading "-" and the first
3495 character, in the hope this might squeeze out yet more improvement.
3497 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3498 flag allowing group syntax was set by the header_syntax check but not
3499 turned off, possible causing trouble later; (2) The flag was not being
3500 set at all for the header_verify test, causing "group"-style headers to
3501 be rejected. I have now set it in this case, and also caused header_
3502 verify to ignore an empty address taken from a group. While doing this, I
3503 came across some other cases where the code for allowing group syntax
3504 while scanning a header line wasn't quite right (mostly, not resetting
3505 the flag correctly in the right place). These bugs could have caused
3506 trouble for malformed header lines. I hope it is now all correct.
3508 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3509 with the "reply" argument non-NULL. The code, however (which originally
3510 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3511 but it didn't always do it. This confused somebody who was copying the
3512 code for some other use. I have removed all the tests.
3514 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3515 feature that was used to support insecure browsers during the U.S. crypto
3516 embargo. It requires special client support, and Exim is probably the
3517 only MTA that supported it -- and would never use it because real RSA is
3518 always available. This code has been removed, because it had the bad
3519 effect of slowing Exim down by computing (never used) parameters for the
3520 RSA_EXPORT functionality.
3522 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3523 authenticator to fail if there's a tab character in the incoming data
3524 (there should never be unless someone is messing about, as it's supposed
3525 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3526 if the connection is using TLS or if the remote IP is the same as the
3527 local IP, and the "valid-client-cert option" if a client certificate has
3530 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3531 authenticators. This can be used for authorization after authentication
3532 succeeds. (In the case of plaintext, it servers for both authentication
3535 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3536 if any retry times were supplied.
3538 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3539 connection, where there is no client IP address to check. In this
3540 situation, the verify now always succeeds.
3542 PH/25 Applied John Jetmore's -Mset patch.
3544 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3546 PH/27 In a string expansion for a processed (not raw) header when multiple
3547 headers of the same name were present, leading whitespace was being
3548 removed from all of them, but trailing whitespace was being removed only
3549 from the last one. Now trailing whitespace is removed from each header
3550 before concatenation. Completely empty headers in a concatenation (as
3551 before) are ignored.
3553 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3554 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3556 PH/29 [Removed. This was a change that I later backed out, and forgot to
3557 correct the ChangeLog entry (that I had efficiently created) before
3558 committing the later change.]
3560 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3561 address errors (4xx response to RCPT) over the same connection as other
3562 messages routed to the same hosts. Such deliveries are always "forced",
3563 so retry times are not inspected. This resulted in far too many retries
3564 for the affected addresses. The effect occurred only when there were more
3565 hosts than the hosts_max_try setting in the smtp transport when it had
3566 the 4xx errors. Those hosts that it had tried were not added to the list
3567 of hosts for which the message was waiting, so if all were tried, there
3568 was no problem. Two fixes have been applied:
3570 (i) If there are any address or message errors in an SMTP delivery, none
3571 of the hosts (tried or untried) are now added to the list of hosts
3572 for which the message is waiting, so the message should not be a
3573 candidate for sending over the same connection that was used for a
3574 successful delivery of some other message. This seems entirely
3575 reasonable: after all the message is NOT "waiting for some host".
3576 This is so "obvious" that I'm not sure why it wasn't done
3577 previously. Hope I haven't missed anything, but it can't do any
3578 harm, as the worst effect is to miss an optimization.
3580 (ii) If, despite (i), such a delivery is accidentally attempted, the
3581 routing retry time is respected, so at least it doesn't keep
3582 hammering the server.
3584 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3585 in ${readsocket because some servers need this prod.
3587 PH/32 Added some extra debug output when updating a wait-xxx database.
3589 PH/33 The hint "could be header name not terminated by colon", which has been
3590 given for certain expansion errors for a long time, was not being given
3591 for the ${if def:h_colon_omitted{... case.
3593 PH/34 The spec says: "With one important exception, whenever a domain list is
3594 being scanned, $domain contains the subject domain." There was at least
3595 one case where this was not true.
3597 PH/35 The error "getsockname() failed: connection reset by peer" was being
3598 written to the panic log as well as the main log, but it isn't really
3599 panic-worthy as it just means the connection died rather early on. I have
3600 removed the panic log writing for the ECONNRESET error when getsockname()
3603 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3604 runs only) independently of the message's sender address. This meant
3605 that, if the 4xx error was in fact related to the sender, a different
3606 message to the same recipient with a different sender could confuse
3607 things. In particular, this can happen when sending to a greylisting
3608 server, but other circumstances could also provoke similar problems.
3609 I have changed the default so that the retry time for these errors is now
3610 based a combination of the sender and recipient addresses. This change
3611 can be overridden by setting address_retry_include_sender=false in the
3614 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3615 remote server are returned as part of bounce messages. This was not
3616 happening for LMTP over a pipe (the lmtp transport), but now it is the
3617 same for both kinds of LMTP.
3619 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3620 in header lines that were in fact CNAMEs. This is no longer the case.
3622 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3623 and queue runs started by the daemon processed all messages. This has
3624 been fixed so that -R and -S can now usefully be given with -q<time>.
3626 PH/40 Import PCRE release 6.7 (fixes some bugs).
3628 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3630 PH/42 Give an error if -q is specified more than once.
3632 PH/43 Renamed the variables $interface_address and $interface_port as
3633 $received_ip_address and $received_port, to make it clear that these
3634 values apply to message reception, and not to the outgoing interface when
3635 a message is delivered. (The old names remain recognized, of course.)
3637 PH/44 There was no timeout on the connect() call when using a Unix domain
3638 socket in the ${readsocket expansion. There now is.
3640 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3641 be meaningful with "accept".
3643 SC/01 Eximstats V1.43
3644 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3646 SC/02 Eximstats V1.44
3647 Use a glob alias rather than an array ref in the generated
3648 parser. This improves both readability and performance.
3650 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3651 Collect SpamAssassin and rejection statistics.
3652 Don't display local sender or destination tables unless
3653 there is data to show.
3654 Added average volumes into the top table text output.
3656 SC/04 Eximstats V1.46
3657 Collect data on the number of addresses (recipients)
3658 as well as the number of messages.
3660 SC/05 Eximstats V1.47
3661 Added 'Message too big' to the list of mail rejection
3662 reasons (thanks to Marco Gaiarin).
3664 SC/06 Eximstats V1.48
3665 Mainlog lines which have GMT offsets and are too short to
3666 have a flag are now skipped.
3668 SC/07 Eximstats V1.49 (Alain Williams)
3669 Added the -emptyok flag.
3671 SC/08 Eximstats V1.50
3672 Fixes for obtaining the IP address from reject messages.
3674 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3675 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3676 whitespace changes from 4.64-PH/27
3678 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3681 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3682 are found, allow negative numbers in numeric criteria)
3684 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3686 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3687 to match changes made in 4.64-PH/43
3689 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3691 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3692 "domain" is actually an IP address, and force a failure. This locks out
3693 those revolvers/nameservers that support "A-for-A" lookups, in
3694 contravention of the specifications.
3696 PH/48 When a host name was looked up from an IP address, and the subsequent
3697 forward lookup of the name timed out, the host name was left in
3698 $sender_host_name, contrary to the specification.
3700 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3701 restricted to single-key lookups, Exim was not diagnosing an error if
3702 * or *@ was used with a query-style lookup.
3704 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3706 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3707 long ago, but noone interested enough thought of it. Let's just say that
3708 the "1.1" means that there are some new functions that weren't there at
3709 some point in the past.
3711 PH/51 Error processing for expansion failure of helo_data from an smtp
3712 transport during callout processing was broken.
3714 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3715 tested/used via the -bh/-bhc/-bs options.
3717 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3718 bug, fixed in subsequent PCRE releases).
3720 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3721 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3723 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3729 SC/01 Use a glob alias rather than an array ref in eximstats generated
3730 parser. This improves both readability and performance.
3732 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3733 Don't display local sender or destination tables in eximstats unless
3734 there is data to show.
3735 Added average volumes into the eximstats top table text output.
3737 SC/03 Collect data on the number of addresses (recipients) as well
3738 as the number of messages in eximstats.
3740 TF/01 Correct an error in the documentation for the redirect router. Exim
3741 does (usually) call initgroups() when daemonizing.
3743 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3744 with consistent privilege compared to when running as a daemon.
3746 TF/03 Note in the spec that $authenticated_id is not set for local
3747 submissions from trusted users.
3749 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3750 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3752 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3753 by adding some example configuration directives to the default
3754 configuration file. A little bit of work is required to uncomment the
3755 directives and define how usernames and passwords are checked, but
3756 there is now a framework to start from.
3758 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3759 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3760 without this. I don't know how relevant this is to other LDAP libraries.
3762 PH/02 Add the verb name to the "unknown ACL verb" error.
3764 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3766 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3768 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3769 directory not expanded when it should be if an expanded home directory
3770 was set for the address (which is overridden by the transport).
3772 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3775 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3776 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3777 because it is too late at that time, and has no effect.
3779 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3780 security issue with \' (bugzilla #107). I could not use the
3781 PQescapeStringConn() function, because it needs a PGconn value as one of
3784 PH/08 When testing addresses using -bt, indicate those final addresses that
3785 are duplicates that would not cause an additional delivery. At least one
3786 person was confused, thinking that -bt output corresponded to deliveries.
3787 (Suppressing duplicates isn't a good idea as you lose the information
3788 about possibly different redirections that led to the duplicates.)
3790 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3791 systems where poll() doesn't work, in particular OS X.
3793 PH/10 Added more information to debugging output for retry time not reached.
3795 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3796 operations in malware.c.
3798 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3801 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3802 syslog_duplication set false, log lines that would normally be written
3803 both the the main log and to the reject log were not written to syslog at
3806 PH/14 In the default configuration, change the use of "message" in ACL warn
3807 statements to "add_header".
3809 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3810 not followed by a command (e.g. "seen endif").
3812 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3813 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3816 PH/17 Added extra conditions to the default value of delay_warning_condition
3820 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3821 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3822 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3825 The Auto-Submitted: and various List- headers are standardised, whereas I
3826 don't think Precedence: ever was.
3828 PH/18 Refactored debugging code in route_finduser() to show more information,
3829 in particular, the error code if getpwnam() issues one.
3831 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3832 This is apparently needed in addition to the PH/07 change above to avoid
3833 any possible encoding problems.
3835 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3836 but not after initializing Perl.
3838 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3839 output them only if debugging. By default they are written stderr,
3840 apparently, which is not desirable.
3842 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3845 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3848 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3850 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3851 authenticated or an ident call has been made. Suppress the default
3852 values for $authenticated_id and $authenticated_sender (but permit -oMai
3853 and -oMas) when testing with -bh.
3855 PH/24 Re-jigged the order of the tests in the default configuration so that the
3856 tests for valid domains and recipients precede the DNS black list and CSA
3857 tests, on the grounds that those ones are more expensive.
3859 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3860 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3861 This bug exists in every version of Exim that I still have, right back to
3864 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3865 However, an attempt to turn on case-sensitivity in a regex key by
3866 including (?-i) didn't work because the subject string was already
3867 lowercased, and the effects were non-intuitive. It turns out that a
3868 one-line patch can be used to allow (?-i) to work as expected.
3874 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3875 other effects) broke the use of negated acl sub-conditions.
3877 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3880 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3881 "Deny" causes Exim to reject the incoming connection with a 554 error.
3882 Unfortunately, if there is a major crisis, such as a disk failure,
3883 tcp-wrappers gives "deny", whereas what one would like would be some
3884 kind of temporary error. A kludge has been added to help with this.
3885 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3886 554 error is used if errno is still zero or contains ENOENT (which occurs
3887 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3890 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3892 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3893 errors. Otherwise a message that provokes a temporary error (when other
3894 messages do not) can cause a whole host to time out.
3896 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3897 addresses were routed directly to files or pipes from a redirect router.
3898 File deliveries just didn't batch; pipe deliveries might have suffered
3901 PH/06 A failure to get a lock for a hints database would erroneously always say
3902 "Failed to get write lock", even when it was really a read lock.
3904 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3905 of 0600. This has been changed to use the value of the lockfile_mode
3906 option (which defaults to 0600).
3908 PH/08 Applied small patch from the Sieve maintainer.
3910 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3911 folder from quota calculations, a direct delivery into this folder messed
3912 up the contents of the maildirsize file. This was because the regex was
3913 used only to exclude .Trash (or whatever) when the size of the mailbox
3914 was calculated. There was no check that a delivery was happening into an
3915 excluded directory. This bug has been fixed by ignoring all quota
3916 processing for deliveries into excluded directories.
3918 PH/10 Added the maildirfolder_create_regex option to appendfile.
3924 PH/01 The code for finding all the local interface addresses on a FreeBSD
3925 system running IPv6 was broken. This may well have applied to all BSD
3926 systems, as well as to others that have similar system calls. The broken
3927 code found IPv4 interfaces correctly, but gave incorrect values for the
3928 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3929 that it would not match correctly against @[] and not recognize the IPv6
3932 PH/02 The ipliteral router was not recognizing addresses of the form user@
3933 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3935 PH/03 Added disable_ipv6.
3937 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3938 decoded form, because it is most often used to construct To: headers
3939 lines in autoreplies, and the decoded form may well be syntactically
3940 invalid. However, $reply_address has leading white space removed, and all
3941 newlines turned into spaces so that the autoreply transport does not
3944 PH/05 If group was specified without a user on a router, and no group or user
3945 was specified on a transport, the group from the router was ignored.
3947 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3948 for visible compile-time settings that can be used to change these
3949 numbers, for those that want even more. Backwards compatibility with old
3950 spool files has been maintained. However, going back to a previous Exim
3951 release will lost any variables that are in spool files.
3953 PH/07 Two small changes when running in the test harness: increase delay when
3954 passing a TCP/IP connection to a new process, in case the original
3955 process has to generate a bounce, and remove special handling of
3956 127.0.0.2 (sic), which is no longer necessary.
3958 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3959 be the same on different OS.
3961 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3964 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3965 whether --show-vars was specified or not
3967 JJ/02 exipick: Added support for new ACL variable spool format introduced
3970 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3971 syntactically invalid From: or Reply-to: line, and a filter used this to
3972 generate an autoreply, and therefore failed to obtain an address for the
3973 autoreply, Exim could try to deliver to a non-existent relative file
3974 name, causing unrelated and misleading errors. What now happens is that
3975 it logs this as a hard delivery error, but does not attempt to create a
3978 PH/11 The exinext utility has a -C option for testing purposes, but although
3979 the given file was scanned by exinext itself; it wasn't being passed on
3980 when Exim was called.
3982 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3983 an end-of-file indication when reading a command response.
3985 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3986 compiled. In many other places in Exim, IPv6 addresses are always
3987 recognized, so I have changed this. It also means that IPv4 domain
3988 literals of the form [IPV4:n.n.n.n] are now always recognized.
3990 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3991 used if the router is not running as root, for example, when verifying at
3992 ACL time, or when using -bh. The debugging output from this situation was
3993 non-existent - all you got was a failure to exec. I have made two
3996 (a) Failures to set uid/gid, the current directory, or a process leader
3997 in a subprocess such as that created by queryprogram now generate
3998 suitable debugging output when -d is set.
4000 (b) The queryprogram router detects when it is not running as root,
4001 outputs suitable debugging information if -d is set, and then runs
4002 the subprocess without attempting to change uid/gid.
4004 PH/15 Minor change to Makefile for building test_host (undocumented testing
4007 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4008 additional section of a DNS packet that returns MX or SRV records.
4009 Instead, it always explicitly searches for A/AAAA records. This avoids
4010 major problems that occur when a DNS server includes only records of one
4011 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4012 fixed another bug: if SRV records were looked up and the corresponding
4013 address records were *not* found in the additional section, the port
4014 values from the SRV records were lost.
4016 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4017 using the correct key (the original address) when searching the retry
4018 rules in order to find which one to use for generating the retry hint.
4020 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4021 adding the default one. Similarly, if it contains a Reply-To: header, the
4022 errors_reply_to option, if set, is not used.
4024 PH/19 When calculating a retry time, Exim used to measure the "time since
4025 failure" by looking at the "first failed" field in the retry record. Now
4026 it does not use this if it is later than than the arrival time of the
4027 message. Instead it uses the arrival time. This makes for better
4028 behaviour in cases where some deliveries succeed, thus re-setting the
4029 "first failed" field. An example is a quota failure for a huge message
4030 when small messages continue to be delivered. Without this change, the
4031 "time since failure" will always be short, possible causing more frequent
4032 delivery attempts for the huge message than are intended.
4033 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4035 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4036 $1, $2, $3) because the numerical variables can be reset during some
4037 expansion items (e.g. "match"), thereby losing the authentication data.
4039 PH/21 Make -bV show the size of off_t variables so that the test suite can
4040 decide whether to run tests for quotas > 2G.
4042 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4043 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4044 filecount value is greater than 2G or if a quota value is greater than 2G
4045 on a system where the size of off_t is not greater than 4, a panic error
4048 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4049 never match. The debug and -bh output now contains an explicit error
4050 message indicating a malformed IPv4 address or mask.
4052 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4053 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4054 PH/23 above applies.
4056 PH/25 Do not write to syslog when running in the test harness. The only
4057 occasion when this arises is a failure to open the main or panic logs
4058 (for which there is an explicit test).
4060 PH/26 Added the /no_tell option to "control=freeze".
4062 PH/27 If a host name lookup failed very early in a connection, for example, if
4063 the IP address matched host_lookup and the reverse lookup yielded a name
4064 that did not have a forward lookup, an error message of the form "no IP
4065 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4066 could be logged. Now it outputs the IP address instead of "NULL".
4068 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4069 allows the sender and the authenticated sender to be set when
4070 submitting a message from within Exim. Since child_open_exim() is
4071 documented for local_scan(), the new function should be too.
4073 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4074 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4075 results in an empty string is now treated as unset.
4077 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4079 PH/31 Added sender_verify_fail logging option.
4081 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4082 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4083 tidied the source and removed it altogether.
4085 PH/33 When a queue run was abandoned because the load average was too high, a
4086 log line was always written; now it is written only if the queue_run log
4087 selector is set. In addition, the log line for abandonment now contains
4088 information about the queue run such as the pid. This is always present
4089 in "start" and "stop" lines but was omitted from the "abandon" line.
4091 PH/34 Omit spaces between a header name and the colon in the error message that
4092 is given when verify = headers_syntax fails (if there are lots of them,
4093 the message gets confusing).
4095 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4096 names, as there are now some PTR records that contain slashes. This check
4097 is only to protect against broken name servers that fall over on strange
4098 characters, so the fact that it applies to all lookups doesn't matter.
4100 PH/36 Now that the new test suite is complete, we can remove some of the
4101 special code in Exim that was needed for the old test suite. For example,
4102 sorting DNS records because real resolvers return them in an arbitrary
4103 order. The new test suite's fake resolver always returns records in the
4106 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4107 bounces) except when queue_only is set, to avoid logging races between
4108 the different processes.
4110 PH/38 Panic-die if .include specifies a non-absolute path.
4112 PH/39 A tweak to the "H" retry rule from its user.
4114 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4115 a label. They prevented compilation on older perls.
4117 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4118 a warning to be raised on newish perls.
4120 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4121 on queue. Changes to match documented behaviour of showing count of
4122 messages matching specified criteria.
4124 PH/40 Changed the default ident timeout from 30s to 5s.
4126 PH/41 Added support for the use of login_cap features, on those BSD systems
4127 that have them, for controlling the resources used by pipe deliveries.
4129 PH/42 The content-scanning code uses fopen() to create files in which to put
4130 message data. Previously it was not paying any attention to the mode of
4131 the files. Exim runs with umask(0) because the rest of the code creates
4132 files with open(), and sets the required mode explicitly. Thus, these
4133 files were ending up world-writeable. This was not a big issue, because,
4134 being within the spool directory, they were not world-accessible. I have
4135 created a function called modefopen, which takes an additional mode
4136 argument. It sets umask(777), creates the file, chmods it to the required
4137 mode, then resets the umask. All the relevant calls to fopen() in the
4138 content scanning code have been changed to use this function.
4140 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4141 to 24 hours. This avoids potential overflow problems when processing G
4142 and H retry rules. I suspect nobody ever tinkers with this value.
4144 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4146 PH/45 When the plaintext authenticator is running as a client, the server's
4147 challenges are checked to ensure they are valid base64 strings. By
4148 default, the authentication attempt is cancelled if an invalid string is
4149 received. Setting client_ignore_invalid_base64 true ignores these errors.
4150 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4151 they are received. Thus, the responses can be made to depend on the
4152 challenges. If an invalid string is ignored, an empty string is placed in
4155 PH/46 Messages that are created by the autoreply transport now contains a
4156 References: header, in accordance with RFCs 2822 and 3834.
4158 PH/47 Added authenticated_sender_force to the smtp transport.
4160 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4162 PH/49 Installed latest patch from the Sieve maintainer.
4164 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4165 was also set, the appendfile transport was unnecessarily scanning a
4166 directory of message files (e.g. for maildir delivery) to find the count
4167 of files (along with the size), even though it did not need this
4168 information. It now does the scan only if it needs to find either the
4169 size of the count of files.
4171 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4173 PH/52 Two bugs concerned with error handling when the smtp transport is
4176 (i) Exim was not creating retry information for temporary errors given
4177 for individual recipients after the DATA command when the smtp transport
4178 was used in LMTP mode. This meant that they could be retried too
4179 frequently, and not timed out correctly.
4181 (ii) Exim was setting the flag that allows error details to be returned
4182 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4183 recipients that were returned after the DATA command.
4185 PH/53 This is related to PH/52, but is more general: for any failing address,
4186 when detailed error information was permitted to be returned to the
4187 sender, but the error was temporary, then after the final timeout, only
4188 "retry timeout exceeded" was returned. Now it returns the full error as
4189 well as "retry timeout exceeded".
4191 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4192 do this, and (what is worse) MTAs that accept it.
4194 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4195 will now be deprecated.
4197 PH/56 New os.c-cygwin from the Cygwin maintainer.
4199 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4200 formats (previously only available in exim formats via -bpr, -bpru,
4201 and -bpra. Now also available in native and exiqgrep formats)
4203 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4204 with very large, slow to parse queues
4206 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4208 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4210 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4211 responses to authentication challenges, though it was showing the
4212 challenges; (ii) I've removed the CR characters from the debug output for
4215 PH/58 Allow for the insertion of a newline as well as a space when a string
4216 is turned into more than one encoded-word during RFC 2047 encoding. The
4217 Sieve code now uses this.
4219 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4220 data_4xx, lost_connection, tls_required.
4222 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4223 message was being sent as an SMTP response.
4225 PH/61 Add -l and -k options to exicyclog.
4227 PH/62 When verifying, if an address was redirected to one new address, so that
4228 verification continued, and the new address failed or deferred after
4229 having set something in $address_data, the value of $address_data was not
4230 passed back to the ACL. This was different to the case when no
4231 redirection occurred. The value is now passed back in both cases.
4233 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4234 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4235 use login_cap.h, so on its own it isn't the distinguishing feature. The
4236 new name refers directly to the setclassresources() function.
4238 PH/65 Added configuration files for NetBSD3.
4240 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4242 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4243 is preferred over IPv4.
4245 PH/68 The bounce_return_message and bounce_return_body options were not being
4246 honoured for bounces generated during the reception of non-SMTP messages.
4247 In particular, this applied to messages rejected by the ACL. This bug has
4248 been fixed. However, if bounce_return_message is true and bounce_return_
4249 body is false, the headers that are returned for a non-SMTP message
4250 include only those that have been read before the error was detected.
4251 (In the case of an ACL rejection, they have all been read.)
4253 PH/69 The HTML version of the specification is now built in a directory called
4254 spec_html instead of spec.html, because the latter looks like a path with
4255 a MIME-type, and this confuses some software.
4257 PH/70 Catch two compiler warnings in sieve.c.
4259 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4260 function verify_get_ident() calls ip_connect() to connect a socket, but
4261 if the "connect()" function timed out, ip_connect() used to close the
4262 socket. However, verify_get_ident() also closes the socket later, and in
4263 between Exim writes to the log, which may get opened at this point. When
4264 the socket was closed in ip_connect(), the log could get the same file
4265 descriptor number as the socket. This naturally causes chaos. The fix is
4266 not to close the socket in ip_connect(); the socket should be closed by
4267 the function that creates it. There was only one place in the code where
4268 this was missing, in the iplookup router, which I don't think anybody now
4269 uses, but I've fixed it anyway.
4271 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4272 well as to direct DNS lookups. Otherwise the handling of names in host
4273 lists is inconsistent and therefore confusing.
4279 PH/01 Two changes to the default runtime configuration:
4281 (1) Move the checks for relay_from_hosts and authenticated clients from
4282 after to before the (commented out) DNS black list checks.
4284 (2) Add control=submission to the relay_from_hosts and authenticated
4285 clients checks, on the grounds that messages accepted by these
4286 statements are most likely to be submissions.
4288 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4290 (1) Generate an error if the third argument for the ${prvs expansion is
4293 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4296 (3) Reset the variables that are obtained from the first argument of
4297 ${prvscheck and used in the second argument before leaving the code,
4298 because their memory is reclaimed, so using them afterwards may do
4301 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4302 one (it's much easier than Tom thought :-).
4304 (5) Because of (4), we can now allow for the use of $prvscheck_result
4305 inside the third argument.
4307 PH/03 For some reason, the default setting of PATH when running a command from
4308 a pipe transport was just "/usr/bin". I have changed it to
4311 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4312 anything to be listed in the output from -bV.
4314 PH/05 When a filter generated an autoreply, the entire To: header line was
4315 quoted in the delivery log line, like this:
4317 => >A.N.Other <ano@some.domain> <original@ddress> ...
4319 This has been changed so that it extracts the operative address. There
4320 may be more than one such address. If so, they are comma-separated, like
4323 => >ano@some.domain,ona@other.domain <original@ddress> ...
4325 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4326 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4327 not being looked up in the rDNS to get a host name, Exim was showing the
4328 IP address twice in Received: lines, even though the IP addresses were
4329 identical. For example:
4331 Received: from [1.2.3.4] (helo=[1.2.3.4])
4333 However, if the real host name was known, it was omitting the HELO data
4334 if it matched the actual IP address. This has been tidied up so that it
4335 doesn't show the same IP address twice.
4337 PH/07 When both +timestamp and +memory debugging was on, the value given by
4338 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4339 called by the debug printing, thereby overwriting the timestamp buffer.
4340 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4342 PH/08 When the original message was included in an autoreply transport, it
4343 always said "this is a copy of the message, including all the headers",
4344 even if body_only or headers_only was set. It now gives an appropriate
4347 PH/09 Applied a patch from the Sieve maintainer which:
4349 o fixes some comments
4350 o adds the (disabled) notify extension core
4351 o adds some debug output for the result of if/elsif tests
4352 o points to the current vacation draft in the documentation
4353 and documents the missing references header update
4357 o fixes a bug in processing the envelope test (when testing
4358 multiple envelope elements, the last element determined the
4361 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4362 Electronic Mail") by including:
4364 Auto-submitted: auto-generated
4366 in the messages that it generates (bounce messages and others, such as
4367 warnings). In the case of bounce messages for non-SMTP messages, there was
4368 also a typo: it was using "Auto_submitted" (underscore instead of
4369 hyphen). Since every message generated by Exim is necessarily in response
4370 to another message, thes have all been changed to:
4372 Auto-Submitted: auto-replied
4374 in accordance with these statements in the RFC:
4376 The auto-replied keyword:
4378 - SHOULD be used on messages sent in direct response to another
4379 message by an automatic process,
4381 - MUST NOT be used on manually-generated messages,
4383 - MAY be used on Delivery Status Notifications (DSNs) and Message
4384 Disposition Notifications (MDNs),
4386 - MUST NOT be used on messages generated by automatic or periodic
4387 processes, except for messages which are automatic responses to
4390 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4391 to the default Received: header definition.
4393 PH/12 Added log selector acl_warn_skipped (default on).
4395 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4396 variables because (a) they are in the wrong storage pool and (b) even if
4397 they were copied, it wouldn't work properly because of the caching.
4399 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4400 checking when decoding. Apparently there are clients that generate
4401 overlong encoded strings. Why am I not surprised?
4403 PH/15 If the first argument of "${if match_address" was not empty, but did not
4404 contain an "@" character, Exim crashed. Now it writes a panic log message
4405 and treats the condition as false.
4407 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4409 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4410 extension "envelope-auth". The code is finished and in agreement with
4411 other implementations, but there is no documentation so far and in fact,
4412 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4413 not changing the active code.
4415 Print executed "if" and "elsif" statements when debugging is used. This
4416 helps a great deal to understand what a filter does.
4418 Document more things not specified clearly in RFC3028. I had all this
4419 sorted out, when out of a sudden new issues came to my mind. Oops."
4421 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4424 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4425 canonical form (as documented). However, after a host name lookup from
4426 the IP address, check_host() was doing a simple string comparison with
4427 addresses acquired from the DNS when checking that the found name did
4428 have the original IP as one of its addresses. Since any found IPv6
4429 addresses are likely to be in abbreviated form, the comparison could
4430 fail. Luckily, there already exists a function for doing the comparison
4431 by converting both addresses to binary, so now that is used instead of
4432 the text comparison.
4434 PH/20 There was another similar case to PH/19, when a complete host name was
4435 given in a host list; looking up its IP address could give an abbreviated
4436 form, whereas the current host's name might or might not be abbreviated.
4437 The same fix has been applied.
4443 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4444 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4447 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4448 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4450 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4452 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4453 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4454 Also, for "Auto-Submitted", treat anything other than "no" as
4455 non-personal, in accordance with RFC 3834. (Previously it treated
4456 anything starting "auto-" as non-personal.)
4458 TF/01 The control=submission/name=... option had a problem with syntax
4459 errors if the name included a slash character. The /name= option
4460 now slurps the rest of the string, so it can include any characters
4461 but it must come last in the list of options (after /sender_retain
4464 PH/05 Some modifications to the interface to the fake nameserver for the new
4472 TK/01 Added the "success_on_redirect" address verification option. See
4473 NewStuff for rationale and an example.
4475 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4477 PH/02 Patch to exigrep to allow it to work on syslog lines.
4479 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4480 fread() to skip over the body file's header line, because in Cygwin the
4481 header line is locked and is inaccessible.
4483 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4484 co-exist for some time) to make it clear that it is the Exim ID that is
4485 referenced, not the Message-ID: header line.
4487 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4488 string_format() function, because snprintf() does not exist on all
4491 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4492 ${stat: expansion item.
4494 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4495 protocol synchronization error", to keep the pedants happy.
4497 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4498 well as for IRIX systems, when gcc is being used. See the host.c source
4501 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4503 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4506 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4507 transport and to the smtp transport in LMTP mode.
4509 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4511 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4512 run a filter in a subprocess. This could lead to confusion in subsequent
4513 lookups in the parent process. There should also be a search_tidyup() at
4514 the end of the subprocess.
4516 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4517 only if the host matched helo_try_verify_hosts, which caused the
4518 verification to occur when the EHLO/HELO command was issued. The ACL just
4519 tested the remembered result. Now, if a previous verification attempt has
4520 not happened, "verify = helo" does it there and then.
4522 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4524 TK/03 Fix log output including CR from clamd.
4526 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4527 exist provoked a memory error which could cause a segfault.
4529 PH/15 Installed PCRE 6.2
4531 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4533 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4534 of the problem. Specifically, suggested +O2 rather than +O1 for the
4537 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4539 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4540 record, the port was not correctly logged when the outgoing_port log
4541 selector was set (it logged the transort's default port).
4543 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4544 fallback_hosts, and "hosts" in the smtp transport.
4546 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4547 host errors such as "Connection refused".
4549 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4550 authentication with radiusclient 0.4.9:
4552 - Error returned from rc_read_config was caught wrongly
4553 - Username/password not passed on to radius server due to wrong length.
4555 The presumption is that some radiusclient API changes for 4.51/PH/17
4556 were not taken care of correctly. The code is still untested by me (my
4557 Linux distribution still has 0.3.2 of radiusclient), but it was
4558 contributed by a Radius user.
4560 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4561 expanding the "port" option of the smtp transport.
4563 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4564 while reading a MIME header. Thanks to Tom Hughes for a patch.
4566 PH/24 Include config.h inside local_scan.h so that configuration settings are
4569 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4570 that in an ACL for RCPT (for example), you can examine exactly what was
4573 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4574 commands, but it was not correctly comparing the address with the actual
4575 client host address. Thus, it would show the EHLO address in Received:
4576 header lines when this was not necessary.
4578 PH/27 Added the % operator to ${eval:}.
4580 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4581 it should be ignoring failures (because with -C, for example, it has lost
4582 privilege). It wasn't ignoring creation failures other than "already
4585 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4588 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4589 because an input line was too long, either on its own, or by virtue of
4590 too many continuations, the temporary file was not being removed, and the
4591 return code was incorrect.
4593 PH/31 Missing "BOOL" in function definition in filtertest.c.
4595 PH/32 Applied Sieve patches from the maintainer.
4597 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4599 PH/33 Added "verify = not_blind".
4601 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4602 Local/Makefile (with some defaults set). These are used in built scripts
4603 such as exicyclog, but they have never been used in the exim_install
4604 script (though there are many overriding facilities there). I have
4605 arranged that the exim_install script now takes note of these two
4608 PH/35 Installed configuration files for Dragonfly.
4610 PH/36 When a locally submitted message by a trusted user did not contain a
4611 From: header, and the sender address was obtained from -f or from an SMTP
4612 MAIL command, and the trusted user did not use -F to supply a sender
4613 name, $originator_name was incorrectly used when constructing a From:
4614 header. Furthermore, $originator_name was used for submission mode
4615 messages from external hosts without From: headers in a similar way,
4616 which is clearly wrong.
4618 PH/37 Added control=suppress_local_fixups.
4620 PH/38 When log_selector = +received_sender was set, and the addition of the
4621 sender made the log line's construction buffer exactly full, or one byte
4622 less than full, an overflow happened when the terminating "\n" was
4625 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4626 when the result of a list match is failure because a DNS lookup failed.
4628 PH/40 RM_COMMAND is now used in the building process.
4630 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4631 the "build-* directories that it finds.
4633 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4634 address in a domain literal was a prefix of an interface address.
4636 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4637 when verifying a sender address, unless rewrite_headers is false.
4639 PH/44 Wrote a long comment about why errors_to addresses are verified as
4640 recipients, not senders.
4642 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4643 the ratelimit ACL was added.
4645 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4647 PH/46 Added extra information about PostgreSQL errors to the error string.
4649 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4650 avoiding the need to install special zones in a real server. This is
4651 backwards compatible; if it can't find the fake resolver, it drops back.
4652 Thus, both old and new test suites can be run.
4654 TF/02 Added util/ratelimit.pl
4656 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4657 clock is set back in time.
4659 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4660 Candler <B.Candler@pobox.com>.
4662 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4663 OK for addresses that are the result of redirections.
4665 PH/48 A number of further additions for the benefit of the new test suite,
4666 including a fake gethostbyname() that interfaces to the fake DNS resolver
4669 TF/06 The fix for widen_domains has also been applied to qualify_single and
4670 search_parents which are the other dnslookup options that can cause
4673 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4676 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4678 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4679 service" if it encountered an MX record with an empty target hostname.
4680 The message is now "an MX or SRV record indicated no SMTP service".
4682 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4683 if the DNS of the sending site is misconfigured. This is quite a
4684 common situation. This change restores the behaviour of treating a
4685 helo verification defer as a failure.
4687 PH/51 If self=fail was set on a router, the bounce message did not include the
4688 actual error message.
4694 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4696 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4697 command itself ended in error, the underlying message about the transport
4698 filter timeout was being overwritten with the pipe command error. Now the
4699 underlying error message should be appended to the second error message.
4701 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4703 PH/02 Reduce the amount of output that "make" produces by default. Full output
4704 can still be requested.
4706 PH/03 The warning log line about a condition test deferring for a "warn" verb
4707 was being output only once per connection, rather than after each
4708 occurrence (because it was using the same function as for successful
4709 "warn" verbs). This seems wrong, so I have changed it.
4711 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4712 it should not have, which might have caused a crash in the right
4713 circumstances, but probably never did.
4715 PH/04 Installed a modified version of Tony Finch's patch to make submission
4716 mode fix the return path as well as the Sender: header line, and to
4717 add a /name= option so that you can make the user's friendly name appear
4720 TF/03 Added the control = fakedefer ACL modifier.
4722 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4723 Mark Lowes for thorough testing.
4725 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4727 TK/03 Merged latest SRS patch from Miles Wilton.
4729 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4730 with the definition in sysexits.h (which is #included earlier).
4731 Fortunately, Exim does not actually use EX_OK. The code used to try to
4732 preserve the sysexits.h value, by assuming that macro definitions were
4733 scanned for macro replacements. I have been disabused of this notion,
4734 so now the code just undefines EX_OK before #including unistd.h.
4736 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4737 in the smtp transport. When a block could not be written in a single
4738 write() function, the timeout was being re-applied to each part-write.
4739 This seems wrong - if the receiver was accepting one byte at a time it
4740 would take for ever. The timeout is now adjusted when this happens. It
4741 doesn't have to be particularly precise.
4743 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4744 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4746 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4747 without a domain if the check to <postmaster@domain> fails.
4749 SC/01 Eximstats: added -xls and the ability to specify output files
4750 (patch written by Frank Heydlauf).
4752 SC/02 Eximstats: use FileHandles for outputting results.
4754 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4756 SC/04 Eximstats: fixed display of large numbers with -nvr option
4758 SC/05 Eximstats: fixed merging of reports with empty tables.
4760 SC/06 Eximstats: added the -include_original_destination flag
4762 SC/07 Eximstats: removed tabs and trailing whitespace.
4764 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4766 TK/06 MBOX spool code: Add real "From " MBOX separator line
4767 so the .eml file is really in mbox format (even though
4768 most programs do not really care). Patch from Alex Miller.
4770 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4771 The latter is generated from $received_to and is only set if the
4772 message has one envelope recipient. SA can use these headers,
4773 obviously out-of-the-box. Patch from Alex Miller.
4775 PH/08 The ${def test on a variable was returning false if the variable's
4776 value was "0", contrary to what the specification has always said!
4777 The result should be true unless the variable is empty.
4779 PH/09 The syntax error of a character other than { following "${if
4780 def:variable_name" (after optional whitespace) was not being diagnosed.
4781 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4782 accidental colon was present, for example, could give incorrect results.
4784 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4785 result is used (not including appendfile, where other changes are about
4788 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4789 This involved changing a lot of size variables from int to off_t. It
4790 should work with maildirs and everything.
4792 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4793 spamd dying while we are connected to it.
4795 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4798 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4799 function for BDB 4.3.
4801 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4803 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4804 the sources for PCRE have been re-arranged and more files are now
4807 PH/15 The code I had for printing potentially long long variables in PH/11
4808 above was not the best (it lost precision). The length of off_t variables
4809 is now inspected at build time, and an appropriate printing format (%ld
4810 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4811 to be "long long int" or "long int". This is needed for the internal
4812 formatting function string_vformat().
4814 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4815 the configuration file to be ":syslog", then the script "guesses" where
4816 the logs files are, rather than using the compiled in default. In our
4817 case the guess is not the same as the compiled default, so the script
4818 suddenly stopped working when I started to use syslog. The patch checks
4819 to see if log_file_path is "". If so, it attempts to read it from exim
4820 with no configuration file to get the compiled in version, before it
4821 falls back to the previous guessing code."
4823 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4824 implementing BATV in an Exim configuration. See NewStuff for the gory
4827 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4828 Makefile that are specific to HP-UX.
4830 PH/18 If the "use_postmaster" option was set for a recipient callout together
4831 with the "random" option, the postmaster address was used as the MAIL
4832 FROM address for the random test, but not for the subsequent recipient
4833 test. It is now used for both.
4835 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4836 patch removes a few documentation additions to RFC 3028, because the
4837 latest draft now contains them. It adds the new en;ascii-case comparator
4838 and a new error check for 8bit text in MIME parts. Comparator and
4839 require names are now matched exactly. I enabled the subaddress
4840 extension, but it is not well tested yet (read: it works for me)."
4842 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4843 rework some of the code of TK/09 above to avoid the hardwired use of
4844 "%lld" and "long long". Replaced the call to snprintf() with a call to
4847 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4848 records point to non-existent hosts", "retry timeout exceeded", and
4849 "retry time not reached for any host after a long failure period".
4851 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4852 experimental DomainKeys support:
4854 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4855 (2) On an error such as an illegally used "control", the wrong name for
4856 the control was given.
4858 These problems did NOT occur unless DomainKeys support was compiled.
4860 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4862 PH/24 Added ${if match_ip condition.
4864 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4865 databases so that it will be absolutely obvious if a crash occurs in the
4866 DB library. This is a regular occurrence (often caused by mis-matched
4869 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4870 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4871 picked up on a user's system that detects such things. There doesn't seem
4872 to be a gcc warning option for this - only an attribute that has to be
4873 put on the function's prototype. It seems that in Fedora Core 4 they have
4874 set this on a number of new functions. No doubt there will be more in due
4877 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4878 specify a transport. However, if an address that was verified by such a
4879 router was the subject of a callout, Exim crashed because it tried to
4880 read the rcpt_include_affixes from the non-existent transport. Now it
4881 just assumes that the setting of that option is false. This bug was
4882 introduced by 4.51/PH/31.
4884 PH/28 Changed -d+all to exclude +memory, because that information is very
4885 rarely of interest, but it makes the output a lot bigger. People tend to
4886 do -d+all out of habit.
4888 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4889 code in os-type was giving problems when libc.so lives in lib64, like on
4892 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4893 aren't the modern standard, and it seems that some systems' include files
4894 don't always have them. Exim was already checking for some of the newer
4895 ones like T_AAAA, and defining it itself. I've added checks for all the
4896 record types that Exim uses.
4898 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4899 not automatically generating a new one, as it is supposed to. This
4900 prevented TLS from working. If the file did exist, but contained invalid
4901 data, a new version was generated, as expected. It was only the case of a
4902 non-existent file that was broken.
4904 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4905 with a change in libdomainkeys > 0.64.
4907 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4908 from DNS. If the selector record carries the flag, it now has
4909 precedence over the domain-wide flag.
4911 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4913 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4914 the use of a port name that isn't defined in /etc/services) occurred, the
4915 message was deferred as in a normal delivery, and thus remained on the
4916 spool, instead of being failed because of the mua_wrapper setting. This
4917 is now fixed, and I tidied up some of the mua_wrapper messages at the
4920 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4921 the messages in a hash of arrays rather than using individual hashes.
4922 This is a bit cleaner and results in dramatic memory savings, albeit
4923 at a slight CPU cost.
4925 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4926 as requested by Marc Sherman.
4928 SC/10 Eximstats: added histograms for user specified patterns as requested
4931 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4933 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4934 fopen() in the content-scanning modules that did not already have it.
4940 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4941 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4943 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4945 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4947 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4948 to test Sieve filters that use "vacation".
4950 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4951 that changes the way the GnuTLS parameters are stored in the cache file.
4952 The new format can be generated externally. For backward compatibility,
4953 if the data in the cache doesn't make sense, Exim assumes it has read an
4954 old-format file, and it generates new data and writes a new file. This
4955 means that you can't go back to an older release without removing the
4958 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4959 work if there are any delivery delays because "one_time" forces the
4960 parent to be marked "delivered", so its unseen clone is never tried
4961 again. For this reason, Exim now forbids the simultaneous setting of
4964 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4965 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4966 entry if you want to know the details. The fix, however, neglected to
4967 consider the case when local delivery batching is involved. The test for
4968 "previously delivered" was not happening when checking to see if an
4969 address could be batched with a previous (undelivered) one; under
4970 certain circumstances this could lead to multiple deliveries to the same
4973 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4974 in its include files, and this causes problems building Exim.
4976 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4977 header_syntax) but Exim was just ignoring anything given after a slash.
4978 In particular, this caused confusion with an attempt to use "verify =
4979 reverse_host_lookup/defer_ok". An error is now given when options are
4980 supplied for verify items that do not have them. (Maybe reverse_host_
4981 lookup should have a defer_ok option, but that's a different point.)
4983 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4984 defined by RFC 821) to 2048, because there were problems with some AUTH
4985 commands, and RFC 1869 says the size should be increased for extended
4986 SMTP commands that take arguments.
4988 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4991 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4992 "unknown" error; now it says that the functionality isn't in the binary.
4994 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4995 an address' error message when a string expansion fails (syntax or
4996 whatever). Otherwise the password may appear in the log. Following change
4997 PH/42 below, there is no longer a chance of it appearing in a bounce
5000 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5002 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5003 of its addresses was ever tried. (Bugzilla bug #2.)
5005 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5006 the result incorrectly in the debug output. (It correctly added a newline
5007 to what was transported.)
5009 TF/01 Added $received_time.
5011 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5012 commented out examples of how to interface to a virus scanner and to
5013 SpamAssassin. Also added commented examples of av_scanner and
5014 spamd_address settings.
5016 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5017 and controls are allowed in which ACLs. There were a couple of minor
5018 errors. Some of the entries in the conditions table (which is a table of
5019 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5020 negation of where the condition IS allowed.
5022 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5024 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5025 header file does not have a version number, so I've had to invent a new
5026 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5027 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5028 radiusclient), but it was contributed by a Radius user.
5030 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5031 files or directories, for OpenSSL.
5033 PH/19 When an Exim process that is running as root has to create an Exim log
5034 file, it does so in a subprocess that runs as exim:exim so as to get the
5035 ownership right at creation (otherwise, other Exim processes might see
5036 the file with the wrong ownership). There was no test for failure of this
5037 fork() call, which would lead to the process getting stuck as it waited
5038 for a non-existent subprocess. Forks do occasionally fail when resources
5039 run out. I reviewed all the other calls to fork(); they all seem to check
5042 PH/20 When checking for unexpected SMTP input at connect time (before writing
5043 the banner), Exim was not dealing correctly with a non-positive return
5044 from the read() function. If the client had disconnected by this time,
5045 the result was a log entry for a synchronization error with an empty
5046 string after "input=" when read() returned zero. If read() returned -1
5047 (an event I could not check), uninitialized data bytes were printed.
5048 There were reports of junk text (parts of files, etc) appearing after
5051 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5053 PH/22 Added support for macro redefinition, and (re)definition in between
5054 driver and ACL definitions.
5056 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5057 forgetting to use the resulting value; it was using the unexpanded value.
5059 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5060 hadn't been configured. The fix is from Juergen Kreileder, who
5061 understands it better than I do:
5063 "Here's what I see happening with three configured cyrus_sasl
5064 authenticators configured (plain, login, cram-md5):
5066 On startup auth_cyrus_sasl_init() gets called for each of these.
5067 This means three calls to sasl_listmech() without a specified mech_list.
5068 => SASL tests which mechs of all available mechs actually work
5069 => three warnings about OTP not working
5070 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5072 With the patch, sasl_listmech() also gets called three times. But now
5073 SASL's mech_list option is set to the server_mech specified in the the
5074 authenticator. Or in other words, the answer from sasl_listmech()
5075 gets limited to just the mech you're testing for (which is different
5077 => the return list contains just 'plain' or 'login', 'cram-md5' or
5078 nothing depending on the value of ob->server_mech.
5080 I've just tested the patch: Authentication still works fine,
5081 unavailable mechs specified in the exim configuration are still
5082 caught, and the auth.log warnings about OTP are gone."
5084 PH/25 When debugging is enabled, the contents of the command line are added
5085 to the debugging output, even when log_selector=+arguments is not
5088 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5089 answer is "GNU", and only if the return is "GNU/something" is the answer
5092 PH/27 $acl_verify_message is now set immediately after the failure of a
5093 verification in an ACL, and so is available in subsequent modifiers. In
5094 particular, the message can be preserved by coding like this:
5096 warn !verify = sender
5097 set acl_m0 = $acl_verify_message
5099 Previously, $acl_verify_message was set only while expanding "message"
5100 and "log_message" when a very denied access.
5102 PH/28 Modified OS/os.c-Linux with
5104 -#ifndef OS_LOAD_AVERAGE
5105 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5107 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5108 nomenclature these days.)
5110 PH/29 Installed patch from the Sieve maintainer that adds the options
5111 sieve_useraddress and sieve_subaddress to the redirect router.
5113 PH/30 In these circumstances:
5114 . Two addresses routed to the same list of hosts;
5115 . First host does not offer TLS;
5116 . First host accepts first address;
5117 . First host gives temporary error to second address;
5118 . Second host offers TLS and a TLS session is established;
5119 . Second host accepts second address.
5120 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5121 and peerdn, if requested) that were in fact used only for the second
5124 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5125 attention to any local part prefix or suffix that was matched by the
5126 router that accepted the address. It now behaves in the same way as it
5127 does for delivery: the affixes are removed from the local part unless
5128 rcpt_include_affixes is set on the transport.
5130 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5131 timeout during the DATA phase of an incoming message.
5133 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5134 applied a patch sanctioned by the Sieve maintainer.
5136 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5137 the uid or gid is negative. A case of a negative gid caused this to be
5138 noticed. The fix allows for either to be negative.
5140 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5141 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5144 PH/36 The change PH/12 above was broken. Fixed it.
5146 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5147 the grounds that routing the same address twice would always produce the
5148 same answer. This might have been true once, but it is certainly no
5149 longer true now. Routing a child address may depend on the previous
5150 routing that produced that child. Some complicated redirection strategies
5151 went wrong when messages had multiple recipients, and made Exim's
5152 behaviour dependent on the order in which the addresses were given.
5154 I have moved the duplicate checking until after the routing is complete.
5155 Exim scans the addresses that are assigned to local and remote
5156 transports, and removes any duplicates. This means that more work will be
5157 done, as duplicates will always all be routed, but duplicates are
5158 presumably rare, so I don't expect this is of any significance.
5160 For deliveries to pipes, files, and autoreplies, the duplicate checking
5161 still happens during the routing process, since they are not going to be
5164 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5165 It corrects a timeout issue with spamd. This is Ian's comment: "The
5166 background is that sometimes spamd either never reads data from a
5167 connection it has accepted, or it never writes response data. The exiscan
5168 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5169 blindly assumes that writes won't block so it may never time out."
5171 PH/39 Allow G after quota size as well as K and M.
5173 PH/40 The value set for $authenticated_id in an authenticator may not contain
5174 binary zeroes or newlines because the value is written to log lines and
5175 to spool files. There was no check on this. Now the value is run through
5176 the string_printing() function so that such characters are converted to
5177 printable escape sequences.
5179 PH/41 $message_linecount is a new variable that contains the total number of
5180 lines in the message. Compare $body_linecount, which is the count for the
5183 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5184 bounce and delay warning messages, except in certain special cases, which
5187 (a) An SMTP error message from a remote host;
5188 (b) A message specified in a :fail: redirection;
5189 (c) A message specified in a "fail" command in a system filter;
5190 (d) A message specified in a FAIL return from the queryprogram router;
5191 (e) A message specified by the cannot_route_message router option.
5193 In these cases only, Exim does include the error details in bounce and
5194 warning messages. There are also a few cases where bland messages such
5195 as "unrouteable address" or "local delivery error" are given.
5197 PH/43 $value is now also set for the "else" part of a ${run expansion.
5199 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5200 being worked on, but at least Exim now implements the latest version to
5203 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5204 process to complete was treated as a delivery failure, a timeout while
5205 writing the message to the pipe was logged, but erroneously treated as a
5206 successful delivery. Such timeouts include transport filter timeouts. For
5207 consistency with the overall process timeout, these timeouts are now
5208 treated as errors, giving rise to delivery failures by default. However,
5209 there is now a new Boolean option for the pipe transport called
5210 timeout_defer, which, if set TRUE, converts the failures into defers for
5211 both kinds of timeout. A transport filter timeout is now identified in
5214 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5215 systems where "make" and "gmake" are different, calling "gmake" at top
5216 level broke things. I've arranged for the value of $(MAKE) to be passed
5217 from the Makefile to this script so that it can call the same version of
5221 A note about Exim versions 4.44 and 4.50
5222 ----------------------------------------
5224 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5225 changes of various kinds. As a consequence, a big documentation update was
5226 needed. This delayed the release for rather longer than seemed good, especially
5227 in the light of a couple of (minor) security issues. Therefore, the changes
5228 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5229 release. So 4.44 and 4.50 are in effect two different branches that both start
5232 I have left the 4.50 change log unchanged; it contains all the changes since
5233 4.43. The change log for 4.44 is below; many of its items are identical to
5234 those for 4.50. This seems to be the most sensible way to preserve the
5235 historical information.
5241 1. Minor wording change to the doc/README.SIEVE file.
5243 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5244 computation of the current number of files was incorrect.
5246 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5247 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5250 4. Give more explanation in the error message when the command for a transport
5251 filter fails to execute.
5253 5. There are several places where Exim runs a non-Exim command in a
5254 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5255 was being done only for the command run by the queryprogram router. It is
5256 now done for all such subprocesses. The other cases are: ${run, transport
5257 filters, and the commands run by the lmtp and pipe transports.
5259 6. Added CONFIGURE_GROUP build-time option.
5261 7. Some older OS have a limit of 256 on the maximum number of file
5262 descriptors. Exim was using setrlimit() to set 1000 as a large value
5263 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5264 systems. I've change it so that if it can't get 1000, it tries for 256.
5266 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5267 was an oversight, and furthermore, ever since the addition of extra
5268 controls (e.g. 4.43/32), the checks on when to allow different forms of
5269 "control" were broken. There should now be diagnostics for all cases when a
5270 control that does not make sense is encountered.
5272 9. Added the /retain_sender option to "control=submission".
5274 10. $recipients is now available in the predata ACL (oversight).
5276 11. Tidy the search cache before the fork to do a delivery from a message
5277 received from the command line. Otherwise the child will trigger a lookup
5278 failure and thereby defer the delivery if it tries to use (for example) a
5279 cached ldap connection that the parent has called unbind on.
5281 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5282 of $address_data from the recipient verification was clobbered by the
5283 sender verification.
5285 13. The value of address_data from a sender verification is now available in
5286 $sender_address_data in subsequent conditions in the ACL statement.
5288 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5290 15. Added a new option "connect=<time>" to callout options, to set a different
5293 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5294 was its contents. (It was OK if the option was not defined at all.)
5296 17. A "Completed" log line is now written for messages that are removed from
5297 the spool by the -Mrm option.
5299 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5300 information about exactly what failed.
5302 19. Added -dd to debug only the daemon process.
5304 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5305 handles timeouts, both on the server side and network timeouts. Renamed the
5306 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5308 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5309 It is now set to "smtps".
5311 22. $host_address is now set to the target address during the checking of
5312 ignore_target_hosts.
5314 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5315 being passed; this would have caused $sender_host_name to have been used if
5316 matching the list had actually called for a host name (not very likely,
5317 since this list is usually IP addresses). A host name is now passed as
5320 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5321 code that specifies a non-restarting handler (typically sigaction() in
5322 modern systems) in an attempt to fix a rare and obscure crash bug.
5324 25. Narrowed the window for a race in the daemon that could cause it to ignore
5325 SIGCHLD signals. This is not a major problem, because they are used only to
5326 wake it up if nothing else does.
5328 26. A malformed maildirsize file could cause Exim to calculate negative values
5329 for the mailbox size or file count. Odd effects could occur as a result.
5330 The maildirsize information is now recalculated if the size or filecount
5333 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5334 support for a long time. Removed HAVE_SYS_VFS_H.
5336 28. Installed the latest version of exipick from John Jetmore.
5338 29. In an address list, if the pattern was not a regular expression, an empty
5339 subject address (from a bounce message) matched only if the pattern was an
5340 empty string. Non-empty patterns were not even tested. This was the wrong
5341 because it is perfectly reasonable to use an empty address as part of a
5342 database query. An empty address is now tested by patterns that are
5343 lookups. However, all the other forms of pattern expect the subject to
5344 contain a local part and a domain, and therefore, for them, an empty
5345 address still always fails if the pattern is not itself empty.
5347 30. Exim went into a mad DNS loop when attempting to do a callout where the
5348 host was specified on an smtp transport, and looking it up yielded more
5349 than one IP address.
5351 31. Re-factored the code for checking spool and log partition space into a
5352 function that finds that data and another that does the check. The former
5353 is then used to implement four new variables: $spool_space, $log_space,
5354 $spool_inodes, and $log_inodes.
5356 32. The RFC2047 encoding function was originally intended for short strings
5357 such as real names; it was not keeping to the 75-character limit for
5358 encoded words that the RFC imposes. It now respects the limit, and
5359 generates multiple encoded words if necessary. To be on the safe side, I
5360 have increased the buffer size for the ${rfc2047: expansion operator from
5363 33. It is now permitted to omit both strings after an "if" condition; if the
5364 condition is true, the result is "true". As before, when the second string
5365 is omitted, a false condition yields an empty string. This makes it less
5366 cumbersome to write custom ACL and router conditions.
5368 34. Failure to deliver a bounce message always caused it to be frozen, even if
5369 there was an errors_to setting on the router. The errors_to setting is now
5372 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5373 canonical form (fully expanded) before being placed in
5374 $sender_host_address.
5376 36. The table in the code that translates DNS record types into text (T_A to
5377 "A" for instance) was missing entries for NS and CNAME. It is just possible
5378 that this could have caused confusion if both these types were looked up
5379 for the same domain, because the text type is used as part of Exim's
5380 per-process caching. But the chance of anyone hitting this buglet seems
5383 37. The dnsdb lookup has been extended in a number of ways.
5385 (1) There is a new type, "zns", which walks up the domain tree until it
5386 finds some nameserver records. It should be used with care.
5388 (2) There is a new type, "mxh", which is like "mx" except that it returns
5389 just the host names, not the priorities.
5391 (3) It is now possible to give a list of domains (or IP addresses) to be
5392 looked up. The behaviour when one of the lookups defers can be
5393 controlled by a keyword.
5395 (4) It is now possible to specify the separator character for use when
5396 multiple records are returned.
5398 38. The dnslists ACL condition has been extended: it is now possible to supply
5399 a list of IP addresses and/or domains to be looked up in a particular DNS
5402 39. Added log_selector=+queue_time_overall.
5404 40. When running the queue in the test harness, wait just a tad after forking a
5405 delivery process, to get repeatability of debugging output.
5407 41. Include certificate and key file names in error message when GnuTLS fails
5408 to set them up, because the GnuTLS error message doesn't include the name
5409 of the failing file when there is a problem reading it.
5411 42. Allow both -bf and -bF in the same test run.
5413 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5415 44. The "Exiscan patch" is now merged into the mainline Exim source.
5417 45. Sometimes the final signoff response after QUIT could fail to get
5418 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5419 < 0 before doing a fflush(). This bug looks as though it goes back to the
5420 introduction of TLS in release 3.20, but "sometimes" must have been rare
5421 because the tests only now provoked it.
5423 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5424 (this can affect the format of dates).
5426 47. exim_tidydb, when checking for the continued existence of a message for
5427 which it has found a message-specific retry record, was not finding
5428 messages that were in split spool directories. Consequently, it was
5429 deleting retry records that should have stayed in existence.
5431 48. Steve fixed some bugs in eximstats.
5433 49. The SPA authentication driver was not abandoning authentication and moving
5434 on to the next authenticator when an expansion was forced to fail,
5435 contradicting the general specification for all authenticators. Instead it
5436 was generating a temporary error. It now behaves as specified.
5438 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5439 (the order specifies the preference for clients). The order is now AES256,
5440 AES128, 3DES, ARCFOUR128.
5442 51. Small patch to Sieve code - explicitly set From: when generating an
5445 52. Exim crashed if a remote delivery caused a very long error message to be
5446 recorded - for instance if somebody sent an entire SpamAssassin report back
5447 as a large number of 550 error lines. This bug was coincidentally fixed by
5448 increasing the size of one of Exim's internal buffers (big_buffer) that
5449 happened as part of the Exiscan merge. However, to be on the safe side, I
5450 have made the code more robust (and fixed the comments that describe what
5453 53. Now that there can be additional text after "Completed" in log lines (if
5454 the queue_time_overall log selector is set), a one-byte patch to exigrep
5455 was needed to allow it to recognize "Completed" as not the last thing in
5458 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5459 patch that reportedly fixes this has been added. I am not expert enough to
5460 create a test for it. This is what the patch creator wrote:
5462 "I found a little strange behaviour of ldap code when working with
5463 Windows 2003 AD Domain, where users was placed in more than one
5464 Organization Units. When I tried to give exim partial DN, the exit code
5465 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5466 But simultaneously result of request was absolutely normal ldap result,
5467 so I produce this patch..."
5469 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5470 REFERENCE, so I have modified the code to exclude the patch when that macro
5473 55. Some experimental protocols are using DNS PTR records for new purposes. The
5474 keys for these records are domain names, not reversed IP addresses. The
5475 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5476 leaves it alone. Component reversal etc. now happens only for IP addresses.
5479 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5481 57. Double the size of the debug message buffer (to 2048) so that more of very
5482 long debug lines gets shown.
5484 58. The exicyclog utility now does better if the number of log files to keep
5485 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5487 59. Two changes related to the smtp_active_hostname option:
5489 (1) $smtp_active_hostname is now available as a variable.
5490 (2) The default for smtp_banner uses $smtp_active_hostname instead
5491 of $primary_hostname.
5493 60. The host_aton() function is supposed to be passed a string that is known
5494 to be a valid IP address. However, in the case of IPv6 addresses, it was
5495 not checking this. This is a hostage to fortune. Exim now panics and dies
5496 if the condition is not met. A case was found where this could be provoked
5497 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5498 components; fortuitously, this particular loophole had already been fixed
5499 by change 4.50/55 above.
5501 If there are any other similar loopholes, the new check in host_aton()
5502 itself should stop them being exploited. The report I received stated that
5503 data on the command line could provoke the exploit when Exim was running as
5504 exim, but did not say which command line option was involved. All I could
5505 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5506 running as the user.
5509 61. There was a buffer overflow vulnerability in the SPA authentication code
5510 (which came originally from the Samba project). I have added a test to the
5511 spa_base64_to_bits() function which I hope fixes it.
5514 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5515 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5517 63. The daemon start-up calls getloadavg() while still root for those OS that
5518 need the first call to be done as root, but it missed one case: when
5519 deliver_queue_load_max is set with deliver_drop_privilege. This is
5520 necessary for the benefit of the queue runner, because there is no re-exec
5521 when deliver_drop_privilege is set.
5523 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5524 This has been fixed.
5526 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5527 was in use, was not putting the data itself into the right store pool;
5528 consequently, it could be overwritten for a subsequent message in the same
5529 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5532 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5534 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5535 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5536 the function were treating the return as a boolean value, which happened to
5537 work because 0=false and not-0=true, but is not correct code.
5539 68. The host_aton() function was not handling scoped IPv6 addresses (those
5540 with, for example, "%eth0" on the end) correctly.
5542 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5543 negated items (that is, ~something) in unsigned ints. Some compilers
5544 apparently mutter when there is no cast.
5546 70. If an address verification called from an ACL failed, and did not produce a
5547 user-specific message (i.e. there was only a "system" message), nothing was
5548 put in $acl_verify_message. In this situation, it now puts the system
5551 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5552 session; change 4.31/43 added the unwanted input to the log line - except
5553 that it did not do this in the start of session case. It now does.
5555 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5556 This is wrong and can cause the other end to generate a synchronization
5557 error if it is another Exim or anything else that does the synchronization
5558 check. A QUIT command is no longer sent after a timeout.
5560 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5561 during host lookups.
5563 74. The defer_ok option of callout verification was not working if it was used
5564 when verifying addresses in header lines, that is, for this case:
5566 verify = header_sender/callout=defer_ok
5568 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5569 those file descriptors could be used for SMTP connections. If anything
5570 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5571 could be sent to the SMTP client, causing chaos. The daemon now opens
5572 stdin, stdout, and stderr to /dev/null when it puts itself into the
5575 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5576 log by default. The user can override this with suitable Perl magic.
5578 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5579 the log message when discard triggers, was not working for the DATA ACL or
5580 for the non-SMTP ACL.
5582 78. Error message wording change in sieve.c.
5584 79. If smtp_accept_max_per_host was set, the number of connections could be
5585 restricted to fewer than expected, because the daemon was trying to set up
5586 a new connection before checking whether the processes handling previous
5587 connections had finished. The check for completed processes is now done
5588 earlier. On busy systems, this bug wouldn't be noticed because something
5589 else would have woken the daemon, and it would have reaped the completed
5592 80. If a message was submitted locally by a user whose login name contained one
5593 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5594 It caused a spool format error. I have fixed the spool reading code. A
5595 related problem was that the "from" clause in the Received: line became
5596 illegal because of the space(s). It is now covered by ${quote_local_part.
5598 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5601 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5603 83. Patch from Sieve maintainer to fix unterminated string problem in
5604 "vacation" handling.
5606 84. Some minor changes to the Linux configuration files to help with other
5607 OS variants using glibc.
5609 85. One more patch for Sieve to update vacation handling to latest spec.
5612 ----------------------------------------------------
5613 See the note above about the 4.44 and 4.50 releases.
5614 ----------------------------------------------------
5620 1. Change 4.43/35 introduced a bug that caused file counts to be
5621 incorrectly computed when quota_filecount was set in an appendfile
5624 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5625 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5628 3. Give more explanation in the error message when the command for a transport
5629 filter fails to execute.
5631 4. There are several places where Exim runs a non-Exim command in a
5632 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5633 was being done only for the command run by the queryprogram router. It is
5634 now done for all such subprocesses. The other cases are: ${run, transport
5635 filters, and the commands run by the lmtp and pipe transports.
5637 5. Some older OS have a limit of 256 on the maximum number of file
5638 descriptors. Exim was using setrlimit() to set 1000 as a large value
5639 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5640 systems. I've change it so that if it can't get 1000, it tries for 256.
5642 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5643 was an oversight, and furthermore, ever since the addition of extra
5644 controls (e.g. 4.43/32), the checks on when to allow different forms of
5645 "control" were broken. There should now be diagnostics for all cases when a
5646 control that does not make sense is encountered.
5648 7. $recipients is now available in the predata ACL (oversight).
5650 8. Tidy the search cache before the fork to do a delivery from a message
5651 received from the command line. Otherwise the child will trigger a lookup
5652 failure and thereby defer the delivery if it tries to use (for example) a
5653 cached ldap connection that the parent has called unbind on.
5655 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5656 of $address_data from the recipient verification was clobbered by the
5657 sender verification.
5659 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5660 was its contents. (It was OK if the option was not defined at all.)
5662 11. A "Completed" log line is now written for messages that are removed from
5663 the spool by the -Mrm option.
5665 12. $host_address is now set to the target address during the checking of
5666 ignore_target_hosts.
5668 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5669 being passed; this would have caused $sender_host_name to have been used if
5670 matching the list had actually called for a host name (not very likely,
5671 since this list is usually IP addresses). A host name is now passed as
5674 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5675 code that specifies a non-restarting handler (typically sigaction() in
5676 modern systems) in an attempt to fix a rare and obscure crash bug.
5678 15. Narrowed the window for a race in the daemon that could cause it to ignore
5679 SIGCHLD signals. This is not a major problem, because they are used only to
5680 wake it up if nothing else does.
5682 16. A malformed maildirsize file could cause Exim to calculate negative values
5683 for the mailbox size or file count. Odd effects could occur as a result.
5684 The maildirsize information is now recalculated if the size or filecount
5687 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5688 support for a long time. Removed HAVE_SYS_VFS_H.
5690 18. Updated exipick to current release from John Jetmore.
5692 19. Allow an empty sender to be matched against a lookup in an address list.
5693 Previously the only cases considered were a regular expression, or an
5696 20. Exim went into a mad DNS lookup loop when doing a callout where the
5697 host was specified on the transport, if the DNS lookup yielded more than
5700 21. The RFC2047 encoding function was originally intended for short strings
5701 such as real names; it was not keeping to the 75-character limit for
5702 encoded words that the RFC imposes. It now respects the limit, and
5703 generates multiple encoded words if necessary. To be on the safe side, I
5704 have increased the buffer size for the ${rfc2047: expansion operator from
5707 22. Failure to deliver a bounce message always caused it to be frozen, even if
5708 there was an errors_to setting on the router. The errors_to setting is now
5711 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5712 canonical form (fully expanded) before being placed in
5713 $sender_host_address.
5715 24. Updated eximstats to version 1.33
5717 25. Include certificate and key file names in error message when GnuTLS fails
5718 to set them up, because the GnuTLS error message doesn't include the name
5719 of the failing file when there is a problem reading it.
5721 26. Expand error message when OpenSSL has problems setting up cert/key files.
5724 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5725 (this can affect the format of dates).
5727 28. exim_tidydb, when checking for the continued existence of a message for
5728 which it has found a message-specific retry record, was not finding
5729 messages that were in split spool directories. Consequently, it was
5730 deleting retry records that should have stayed in existence.
5732 29. eximstats updated to version 1.35
5733 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5734 1.35 - bugfix such that pie charts by volume are generated correctly
5736 30. The SPA authentication driver was not abandoning authentication and moving
5737 on to the next authenticator when an expansion was forced to fail,
5738 contradicting the general specification for all authenticators. Instead it
5739 was generating a temporary error. It now behaves as specified.
5741 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5742 (the order specifies the preference for clients). The order is now AES256,
5743 AES128, 3DES, ARCFOUR128.
5745 31. Small patch to Sieve code - explicitly set From: when generating an
5748 32. Exim crashed if a remote delivery caused a very long error message to be
5749 recorded - for instance if somebody sent an entire SpamAssassin report back
5750 as a large number of 550 error lines. This bug was coincidentally fixed by
5751 increasing the size of one of Exim's internal buffers (big_buffer) that
5752 happened as part of the Exiscan merge. However, to be on the safe side, I
5753 have made the code more robust (and fixed the comments that describe what
5756 33. Some experimental protocols are using DNS PTR records for new purposes. The
5757 keys for these records are domain names, not reversed IP addresses. The
5758 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5759 leaves it alone. Component reversal etc. now happens only for IP addresses.
5762 34. The host_aton() function is supposed to be passed a string that is known
5763 to be a valid IP address. However, in the case of IPv6 addresses, it was
5764 not checking this. This is a hostage to fortune. Exim now panics and dies
5765 if the condition is not met. A case was found where this could be provoked
5766 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5767 components; fortuitously, this particular loophole had already been fixed
5768 by change 4.50/55 or 4.44/33 above.
5770 If there are any other similar loopholes, the new check in host_aton()
5771 itself should stop them being exploited. The report I received stated that
5772 data on the command line could provoke the exploit when Exim was running as
5773 exim, but did not say which command line option was involved. All I could
5774 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5775 running as the user.
5778 35. There was a buffer overflow vulnerability in the SPA authentication code
5779 (which came originally from the Samba project). I have added a test to the
5780 spa_base64_to_bits() function which I hope fixes it.
5783 36. The daemon start-up calls getloadavg() while still root for those OS that
5784 need the first call to be done as root, but it missed one case: when
5785 deliver_queue_load_max is set with deliver_drop_privilege. This is
5786 necessary for the benefit of the queue runner, because there is no re-exec
5787 when deliver_drop_privilege is set.
5789 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5790 was in use, was not putting the data itself into the right store pool;
5791 consequently, it could be overwritten for a subsequent message in the same
5792 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5795 38. Sometimes the final signoff response after QUIT could fail to get
5796 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5797 < 0 before doing a fflush(). This bug looks as though it goes back to the
5798 introduction of TLS in release 3.20, but "sometimes" must have been rare
5799 because the tests only now provoked it.
5805 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5806 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5807 Now it returns an integer. A number of calls were still expecting a T/F
5808 return. Fortuitously, in all cases, the tests worked in OK situations,
5809 which is the norm. However, things would have gone wrong on any write
5810 failures on the smtp file descriptor. This function is used when sending
5811 messages over SMTP and also when doing verify callouts.
5813 2. When Exim is called to do synchronous delivery of a locally submitted
5814 message (the -odf or -odi options), it no longer closes stderr before doing
5817 3. Implemented the mua_wrapper option.
5819 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5821 5. Implemented the functions header_remove(), header_testname(),
5822 header_add_at_position(), and receive_remove_recipient(), and exported them
5825 6. If an ACL "warn" statement specified the addition of headers, Exim already
5826 inserted X-ACL-Warn: at the start if there was no header name. However, it
5827 was not making this test for the second and subsequent header lines if
5828 there were newlines in the string. This meant that an invalid header could
5829 be inserted if Exim was badly configured.
5831 7. Allow an ACL "warn" statement to add header lines at the start or after all
5832 the Received: headers, as well as at the end.
5834 8. Added the rcpt_4xx retry error code.
5836 9. Added postmaster_mailfrom=xxx to callout verification option.
5838 10. Added mailfrom=xxxx to the callout verification option, for verify=
5841 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5842 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5844 12. Inserted some casts to stop certain compilers warning when using pointer
5845 differences as field lengths or precisions in printf-type calls (mostly
5846 affecting debugging statements).
5848 13. Added optional readline() support for -be (dynamically loaded).
5850 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5851 same clock tick as a message's arrival, so that its received time was the
5852 same as the "first fail" time on the retry record, and that message
5853 remained on the queue past the ultimate address timeout, every queue runner
5854 would try a delivery (because it was past the ultimate address timeout) but
5855 after another failure, the ultimate address timeout, which should have then
5856 bounced the address, did not kick in. This was a "< instead of <=" error;
5857 in most cases the first failure would have been in the next clock tick
5858 after the received time, and all would be well.
5860 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5861 being recognized when the domain list was tested by the match_domain
5862 condition in an expansion string.
5864 16. Added the ${str2b64: operator.
5866 17. Exim was always calling setrlimit() to set a large limit for the number of
5867 processes, without checking whether the existing limit was already
5868 adequate. (It did check for the limit on file descriptors.) Furthermore,
5869 errors from getrlimit() and setrlimit() were being ignored. Now they are
5870 logged to the main and panic logs, but Exim does carry on, to try to do its
5871 job under whatever limits there are.
5873 18. Imported PCRE 5.0.
5875 19. Trivial typo in log message " temporarily refused connection" (the leading
5878 20. If the log selector return_path_on_delivery was set and an address was
5879 redirected to /dev/null, the delivery process crashed because it assumed
5880 that a return path would always be set for a "successful" delivery. In this
5881 case, the whole delivery is bypassed as an optimization, and therefore no
5884 21. Internal re-arrangement: the function for sending a challenge and reading
5885 a response while authentication was assuming a zero-terminated challenge
5886 string. It's now changed to take a pointer and a length, to allow for
5887 binary data in such strings.
5889 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5891 23. Exim was not respecting finduser_retries when seeking the login of the
5892 uid under which it was called; it was always trying 10 times. (The default
5893 setting of finduser_retries is zero.) Also, it was sleeping after the final
5894 failure, which is pointless.
5896 24. Implemented tls_on_connect_ports.
5898 25. Implemented acl_smtp_predata.
5900 26. If the domain in control=submission is set empty, Exim assumes that the
5901 authenticated id is a complete email address when it generates From: or
5902 Sender: header lines.
5904 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5905 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5906 chown and chgrp in /bin and hostname in /usr/bin.
5908 28. Exim was keeping the "process log" file open after each use, just as it
5909 does for the main log. This opens the possibility of it remaining open for
5910 long periods when the USR1 signal hits a daemon. Occasional processlog
5911 errors were reported, that could have been caused by this. Anyway, it seems
5912 much more sensible not to leave this file open at all, so that is what now
5915 29. The long-running daemon process does not normally write to the log once it
5916 has entered its main loop, and it closes the log before doing so. This is
5917 so that log files can straightforwardly be renamed and moved. However,
5918 there are a couple of unusual error situations where the daemon does write
5919 log entries, and I had neglected to close the log afterwards.
5921 30. The text of an SMTP error response that was received during a remote
5922 delivery was being truncated at 512 bytes. This is too short for some of
5923 the long messages that one sometimes sees. I've increased the limit to
5926 31. It is now possible to make retry rules that apply only when a message has a
5927 specific sender, in particular, an empty sender.
5929 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5930 it possible to be selective about when SMTP synchronization is enforced.
5932 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5934 32. Implemented hosts_connection_nolog.
5936 33. Added an ACL for QUIT.
5938 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5941 35. Added mailbox_size and mailbox_filecount to appendfile.
5943 36. Added control = no_multiline_responses to ACLs.
5945 37. There was a bug in the logic of the code that waits for the clock to tick
5946 in the case where the clock went backwards by a substantial amount such
5947 that the microsecond fraction of "now" was more than the microsecond
5948 fraction of "then" (but the whole seconds number was less).
5950 38. Added support for the libradius Radius client library this is found on
5951 FreeBSD (previously only the radiusclient library was supported).
5957 1. When certain lookups returned multiple values in the form name=value, the
5958 quoting of the values was not always being done properly. Specifically:
5959 (a) If the value started with a double quote, but contained no whitespace,
5961 (b) If the value contained whitespace other than a space character (i.e.
5962 tabs or newlines or carriage returns) it was not quoted.
5963 This fix has been applied to the mysql and pgsql lookups by writing a
5964 separate quoting function and calling it from the lookup code. The fix
5965 should probably also be applied to nisplus, ibase and oracle lookups, but
5966 since I cannot test any of those, I have not disturbed their existing code.
5968 2. A hit in the callout cache for a specific address caused a log line with no
5969 reason for rejecting RCPT. Now it says "Previous (cached) callout
5970 verification failure".
5972 3. There was an off-by-one bug in the queryprogram router. An over-long
5973 return line was truncated at 256 instead of 255 characters, thereby
5974 overflowing its buffer with the terminating zero. As well as fixing this, I
5975 have increased the buffer size to 1024 (and made a note to document this).
5977 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5978 when Exim is waiting for an SMTP response from a remote server, Exim
5979 restarts its select() call on the socket, thereby resetting its timeout.
5980 This is not a problem when such interrupts are rare. Somebody set up a cron
5981 job to run exiwhat every 2 minutes, which is less than the normal select()
5982 timeout (5 or 10 minutes). This meant that the select() timeout never
5983 kicked in because it was always reset. I have fixed this by comparing the
5984 time when an interrupt arrives with the time at the start of the first call
5985 to select(). If more time than the timeout has elapsed, the interrupt is
5986 treated as a timeout.
5988 5. Some internal re-factoring in preparation for the addition of Sieve
5989 extensions (by MH). In particular, the "personal" test is moved to a
5990 separate function, and given an option for scanning Cc: and Bcc: (which is
5991 not set for Exim filters).
5993 6. When Exim created an email address using the login of the caller as the
5994 local part (e.g. when creating a From: or Sender: header line), it was not
5995 quoting the local part when it contained special characters such as @.
5997 7. Installed new OpenBSD configuration files.
5999 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6000 try to make them clearer.
6002 9. Callout options, other than the timeout value, were being ignored when
6003 verifying sender addresses in header lines. For example, when using
6005 verify = header_sender/callout=no_cache
6007 the cache was (incorrectly) being used.
6009 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6010 only the Cygwin environment.
6012 11. When return_path_on_delivery was set as a log selector, if different remote
6013 addresses in the same message used different return paths and parallel
6014 remote delivery occurred, the wrong values would sometimes be logged.
6015 (Whenever a remote delivery process finished, the return path value from
6016 the most recently started remote delivery process was logged.)
6018 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6019 lines when AUTH and/or TLS are in use. This is the "received protocol"
6020 field. Exim used to use "asmtp" for authenticated SMTP, without any
6021 indication (in the protocol name) for TLS use. Now it follows the RFC and
6022 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6023 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6024 names appear in log lines as well as in Received: header lines.
6026 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6027 extensions, and comparison tests, and to fix some bugs.
6029 14. Changes to the "personal" filter test:
6031 (1) The test was buggy in that it was just doing the equivalent of
6032 "contains" tests on header lines. For example, if a user's address was
6033 anne@some.where, the "personal" test would incorrectly be true for
6035 To: susanne@some.where
6037 This test is now done by extracting each address from the header in turn,
6038 and checking the entire address. Other tests that are part of "personal"
6039 are now done using regular expressions (for example, to check local parts
6040 of addresses in From: header lines).
6042 (2) The list of non-personal local parts in From: addresses has been
6043 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6044 taken from the Sieve specification recommendations.
6046 (3) If the message contains any header line starting with "List-" it is
6047 treated as non-personal.
6049 (4) The test for "circular" in the Subject: header line has been removed
6050 because it now seems ill-conceived.
6052 15. Minor typos in src/EDITME comments corrected.
6054 16. Installed latest exipick from John Jetmore.
6056 17. If headers_add on a router specified a text string that was too long for
6057 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6058 of string_sprintf() is now avoided.
6060 18. $message_body_size was not set (it was always zero) when running the DATA
6061 ACL and the local_scan() function.
6063 19. For the "mail" command in an Exim filter, no default was being set for
6064 the once_repeat time, causing a random time value to be used if "once" was
6065 specified. (If the value happened to be <= 0, no repeat happened.) The
6066 default is now 0s, meaning "never repeat". The "vacation" command was OK
6067 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6068 (I found it when inspecting the code).
6070 20. There is now an overall timeout for performing a callout verification. It
6071 defaults to 4 times the callout timeout, which applies to individual SMTP
6072 commands during the callout. The overall timeout applies when there is more
6073 than one host that can be tried. The timeout is checked before trying the
6074 next host. This prevents very long delays if there are a large number of
6075 hosts and all are timing out (e.g. when the network connections are timing
6076 out). The value of the overall timeout can be changed by specifying an
6077 additional sub-option for "callout", called "maxwait". For example:
6079 verify = sender/callout=5s,maxwait=20s
6081 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6082 to the end before writing, but this should make it even safer).
6084 22. Exim was forgetting that it had advertised PIPELINING for the second and
6085 subsequent messages on an SMTP connection. It was also not resetting its
6086 memory on STARTTLS and an internal HELO.
6088 23. When Exim logs an SMTP synchronization error within a session, it now
6089 records whether PIPELINING has been advertised or not.
6091 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6092 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6093 rather than long int.
6095 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6097 26. Added the never_mail option to autoreply.
6103 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6104 crash if the getsockname() call failed; this can happen if a connection is
6105 closed very soon after it is established. The problem was simply in the
6106 order in which certain operations were done, causing Exim to try to write
6107 to the SMTP stream before it had set up the file descriptor. The bug has
6108 been fixed by making things happen in the correct order.
6114 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6115 before the connection was closed, thus losing the rejection response.
6117 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6118 some early Solaris releases, but causes trouble in current releases where
6119 socklen_t is defined.
6121 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6124 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6127 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6128 that releasing the top of it at the end releases what was used for sub-
6129 expansions (unless the block got too big). However, discard this block if
6130 the first thing is a variable or header, so that we can use its block when
6131 it is dynamic (useful for very large $message_headers, for example).
6133 6. Lookups now cache *every* query, not just the most recent. A new, separate
6134 store pool is used for this. It can be recovered when all lookup caches are
6135 flushed. Lookups now release memory at the end of their result strings.
6136 This has involved some general refactoring of the lookup sources.
6138 7. Some code has been added to the store_xxx() functions to reduce the amount
6139 of flapping under certain conditions.
6141 8. log_incoming_interface used to affect only the <= reception log lines. Now
6142 it causes the local interface and port to be added to several more SMTP log
6143 lines, for example "SMTP connection from", and rejection lines.
6145 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6147 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6149 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6150 could be overwritten at the end of the current message (or the start of a
6151 new message if it was set in a HELO ACL). The value is now preserved for
6152 the duration of the SMTP connection.
6154 12. If a transport had a headers_rewrite setting, and a matching header line
6155 contained an unqualified address, that address was qualified, even if it
6156 did not match any rewriting rules. The underlying bug was that the values
6157 of the flags that permit the existence of unqualified sender and recipient
6158 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6159 non-local messages, and by -bnq for local messages) were not being
6160 preserved with the message after it was received.
6162 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6163 "next input=" as part of the text comprising the host identity instead of
6164 the correct text. The code was using the same buffer for two different
6165 strings. However, depending on which order the printing function evaluated
6166 its arguments, the bug did not always show up. Under Linux, for example, my
6167 test suite worked just fine.
6169 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6170 doesn't work with some older versions of Perl. It has been changed to "my",
6171 which in any case is probably the better facility to use.
6173 15. A really picky compiler found some instances of statements for creating
6174 error messages that either had too many or two few arguments for the format
6177 16. The size of the buffer for calls to the DNS resolver has been increased
6178 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6179 for addresses that have a lot of PTR records. This alleviates a problem; it
6180 does not fully solve it.
6182 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6183 buffer now truncates the list and logs the incident, which is the same
6184 action as happens when Exim is looking up a host name and its aliases.
6185 Previously in this situation something unpredictable would happen;
6186 sometimes it was "internal error: store_reset failed".
6188 18. If a server dropped the connection unexpectedly when an Exim client was
6189 using GnuTLS and trying to read a response, the client delivery process
6190 crashed while trying to generate an error log message.
6192 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6193 string, for example:
6195 warn message = H1: something\nH2: something
6197 the text was added as a single header line from Exim's point of view
6198 though it ended up OK in the delivered message. However, searching for the
6199 second and subsequent header lines using $h_h2: did not work. This has been
6200 fixed. Similarly, if a system filter added multiple headers in this way,
6201 the routers could not see them.
6203 20. Expanded the error message when iplsearch is called with an invalid key to
6204 suggest using net-iplsearch in a host list.
6206 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6207 ACLs are no longer actually imposed (and a message to that effect is
6210 22. If a "gecos" field in a passwd entry contained escaped characters, in
6211 particular, if it contained a \" sequence, Exim got it wrong when building
6212 a From: or a Sender: header from that name. A second bug also caused
6213 incorrect handling when an unquoted " was present following a character
6214 that needed quoting.
6216 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6217 was not being matched caselessly.
6219 24. Arranged for all hyphens in the exim.8 source to be escaped with
6222 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6223 properly. Recipient callout cache records were still being keyed to include
6224 the sender, even when use_sender was set false. This led to far more
6225 callouts that were necessary. The sender is no longer included in the key
6226 when use_sender is false.
6228 26. Added "control = submission" modifier to ACLs.
6230 27. Added the ${base62d: operator to decode base 62 numbers.
6232 28. dnsdb lookups can now access SRV records.
6234 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6235 the configuration file.
6237 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6238 (-v) mode. This makes the output for a verbose queue run more intelligible.
6240 31. Added a use_postmaster feature to recipient callouts.
6242 32. Added the $body_zerocount variable, containing the number of binary zero
6243 bytes in the message body.
6245 33. The time of last modification of the "new" subdirectory is now used as the
6246 "mailbox time last read" when there is a quota error for a maildir
6249 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6251 35. Added +ignore_unknown as a special item in host lists.
6253 36. Code for decoding IPv6 addresses in host lists is now included, even if
6254 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6255 address was recognized as an IP address, but was then not correctly decoded
6256 into binary, causing unexpected and incorrect effects when compared with
6263 1. Very minor rewording of debugging text in manualroute to say "list of
6264 hosts" instead of "hostlist".
6266 2. If verify=header_syntax was set, and a header line with an unqualified
6267 address (no domain) and a large number of spaces between the end of the
6268 name and the colon was received, the reception process suffered a buffer
6269 overflow, and (when I tested it) crashed. This was caused by some obsolete
6270 code that should have been removed. The fix is to remove it!
6272 3. When running in the test harness, delay a bit after writing a bounce
6273 message to get a bit more predictability in the log output.
6275 4. Added a call to search_tidyup() just before forking a reception process. In
6276 theory, someone could use a lookup in the expansion of smtp_accept_max_
6277 per_host which, without the tidyup, could leave open a database connection.
6279 5. Added the variables $recipient_data and $sender_data which get set from a
6280 lookup success in an ACL "recipients" or "senders" condition, or a router
6281 "senders" option, similar to $domain_data and $local_part_data.
6283 6. Moved the writing of debug_print from before to after the "senders" test
6286 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6287 problems for message scanning, either using a data ACL, or using
6288 local_scan() because the Received: header was not generated till after they
6289 were called (in order to set the time as the time of reception completion).
6290 I have revised the way this works. The header is now generated after the
6291 body is received, but before the ACL or local_scan() are called. After they
6292 are run, the timestamp in the header is updated.
6298 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6299 before starting a queue runner without re-exec. This happened only when
6300 deliver_drop_privilege was set or when the Exim user was set to root. The
6301 effect of the bug was that timeouts during subsequent deliveries caused
6302 crashes instead of being properly handled. The handler is now left at its
6303 default (and expected) setting.
6305 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6306 message, again when deliver_drop_privilege is set or Exim is run as root.
6307 The bug described in (1) was not present in this case, but the tidying up
6308 of the other signals was missing. I have made the two cases consistent.
6310 3. The ignore_target_hosts setting on a manualroute router was being ignored
6311 for hosts that were looked up using the /MX notation.
6313 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6316 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6317 operated on the sender address. After changing the $sender_address to <>
6318 for the sender address verify, Exim was re-instated it as the original
6319 (before rewriting) address, but remembering that it had rewritten it, so it
6320 wasn't rewriting it again. This bug also had the effect of breaking the
6321 sender address verification caching when the sender address was rewritten.
6323 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6324 This has been changed so that if the ip literal address matches
6325 ignore_target_hosts, the router declines.
6327 7. Added expansion conditions match_domain, match_address, and match_local_
6328 part (NOT match_host).
6330 8. The placeholder for the Received: header didn't have a length field set.
6332 9. Added code to Exim itself and to exim_lock to test for a specific race
6333 condition that could lead to file corruption when using MBX delivery. The
6334 issue is with the lockfile that is created in /tmp. If this file is removed
6335 after a process has opened it but before that process has acquired a lock,
6336 there is the potential for a second process to recreate the file and also
6337 acquire a lock. This could lead to two Exim processes writing to the file
6338 at the same time. The added code performs the same test as UW imapd; it
6339 checks after acquiring the lock that its file descriptor still refers to
6340 the same named file.
6342 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6343 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6346 11. Added the smtp_active_hostname option. If used, this will typically be made
6347 to depend on the incoming interface address. Because $interface_address is
6348 not set up until the daemon has forked a reception process, error responses
6349 that can happen earlier (such as "too many connections") no longer contain
6352 12. If an expansion in a condition on a "warn" statement fails because a lookup
6353 defers, the "warn" statement is abandoned, and the next ACL statement is
6354 processed. Previously this caused the whole ACL to be aborted.
6356 13. Added the iplsearch lookup type.
6358 14. Added ident_timeout as a log selector.
6360 15. Added tls_certificate_verified as a log selector.
6362 16. Added a global option tls_require_ciphers (compare the smtp transport
6363 option of the same name). This controls incoming TLS connections.
6365 17. I finally figured out how to make tls_require_ciphers do a similar thing
6366 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6367 before starting the TLS session.
6369 18. Tabs are now shown as \t in -bP output.
6371 19. If the log selector return_path_on_delivery was set, Exim crashed when
6372 bouncing a message because it had too many Received: header lines.
6374 20. If two routers both had headers_remove settings, and the first one included
6375 a superfluous trailing colon, the final name in the first list and the
6376 first name in the second list were incorrectly joined into one item (with a
6377 colon in the middle).
6383 1. Added -C and -D options to the exinext utility, mainly to make it easier
6384 to include in the automated testing, but these could be helpful when
6385 multiple configurations are in use.
6387 2. The exinext utility was not formatting the output nicely when there was
6388 an alternate port involved in the retry record key, nor when there was a
6389 message id as well (for retries that were specific to a specific message
6390 and a specific host). It was also confused by IPv6 addresses, because of
6391 the additional colons they contain. I have fixed the IPv4 problem, and
6392 patched it up to do a reasonable job for IPv6.
6394 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6395 delivery, the log line now contains "pipelined" if PIPELINING was used.
6397 4. An SMTP transport process used to panic and die if the bind() call to set
6398 an explicit outgoing interface failed. This has been changed; it is now
6399 treated in the same way as a connect() failure.
6401 5. A reference to $sender_host_name in the part of a conditional expansion
6402 that was being skipped was still causing a DNS lookup. This no longer
6405 6. The def: expansion condition was not recognizing references to header lines
6406 that used bh_ and bheader_.
6408 7. Added the _cache feature to named lists.
6410 8. The code for checking quota_filecount in the appendfile transport was
6411 allowing one more file than it should have been.
6413 9. For compatibility with Sendmail, the command line option
6421 and sets the incoming protocol and host name (for trusted callers). The
6422 host name and its colon can be omitted when only the protocol is to be set.
6423 Note the Exim already has two private options, -pd and -ps, that refer to
6424 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6425 "s", but I don't think that's a major issue.
6427 10. A number of refactoring changes to the code, none of which should affect
6430 (a) The number of logging options was getting close to filling up the
6431 32-bit word that was used as a bit map. I have split them into two classes:
6432 those that are passed in the argument to log_write(), and those that are
6433 only ever tested independently outside of that function. These are now in
6434 separate 32-bit words, so there is plenty of room for expansion again.
6435 There is no change in the user interface or the logging behaviour.
6437 (b) When building, for example, log lines, the code previously used a
6438 macro that called string_cat() twice, in order to add two strings. This is
6439 not really sufficiently general. Furthermore, there was one instance where
6440 it was actually wrong because one of the argument was used twice, and in
6441 one call a function was used. (As it happened, calling the function twice
6442 did not affect the overall behaviour.) The macro has been replaced by a
6443 function that can join an arbitrary number of extra strings onto a growing
6446 (c) The code for expansion conditions now uses a table and a binary chop
6447 instead of a serial search (which was left over from when there were very
6448 few conditions). Also, it now recognizes conditions like "pam" even when
6449 the relevant support is not compiled in: a suitably worded error message is
6450 given if an attempt is made to use such a condition.
6452 11. Added ${time_interval:xxxxx}.
6454 12. A bug was causing one of the ddress fields not to be passed back correctly
6455 from remote delivery subprocesses. The field in question was not being
6456 subsequently used, so this caused to problems in practice.
6458 13. Added new log selectors queue_time and deliver_time.
6460 14. Might have fixed a bug in maildirsizefile handling that threw up
6461 "unexpected character" debug warnings, and recalculated the data
6462 unnecessarily. In any case, I expanded the warning message to give more
6465 15. Added the message "Restricted characters in address" to the statements in
6466 the default ACL that block characters like @ and % in local parts.
6468 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6469 Three changes have been made:
6471 (a) There was a serious bug; a negative response to MAIL caused the whole
6472 recipient domain to be cached as invalid, thereby blocking all messages
6473 to all local parts at the same domain, from all senders. This bug has
6474 been fixed. The domain is no longer cached after a negative response to
6475 MAIL if the sender used is not empty.
6477 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6480 (c) A new callout option, "use_sender" has been added for people who want
6481 the modified behaviour.
6487 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6490 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6491 indeed breaks things for older releases.
6493 3. Added additional logging to the case where there is a problem reading data
6494 from a filter that is running in a subprocess using a pipe, in order to
6495 try to track down a specific problem.
6497 4. Testing facility fudge: when running in the test harness and attempting
6498 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6499 getting "No route to host". Convert this to a timeout.
6501 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6504 6. Some OS don't have socklen_t but use size_t instead. This affects the
6505 fifth argument of getsockopt() amongst other things. This is now
6506 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6507 can be set for individual OS. I have set it for SunOS5, OSF1, and
6508 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6509 some earlier ones do not.
6511 7. Change 4.30/15 was not doing the test caselessly.
6513 8. The standard form for an IPv6 address literal was being rejected by address
6514 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6515 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6516 this, as well as the form without the "IPv6" on the front (but only when
6517 address literals are enabled, of course).
6519 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6521 10. Exim crashed if a message with an empty sender address specified by -f
6522 encountered a router with an errors_to setting. This could be provoked only
6523 by a command such as
6527 where an empty string was supplied; "<>" did not hit this bug.
6529 11. Installed PCRE release 4.5.
6531 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6532 remained set. It is now erased.
6534 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6535 times from message ids (which are base 36 rather than the normal 62).
6537 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6538 were being counted as actual protocol errors, and logged if the log
6539 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6540 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6541 and DATA following a set of rejected RCPTs do not count as protocol errors.
6542 In other words, Exim assumes they were pipelined, though this may not
6543 actually be the case. Of course, in all cases the client gets an
6544 appropriate error code.
6546 15. If a lookup fails in an ACL condition, a message about the failure may
6547 be available; it is used if testing the ACL cannot continue, because most
6548 such messages specify what the cause of the deferral is. However, some
6549 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6550 that caused an old message to be retained and used if a later statement
6551 caused a defer, replacing the real cause of the deferral.
6553 16. If an IP address had so many PTR records that the DNS lookup buffer
6554 was not large enough to hold them, Exim could crash while trying to process
6555 the truncated data. It now detects and logs this case.
6557 17. Further to 4.21/58, another change has been made: if (and only if) the
6558 first line of a message (the first header line) ends with CRLF, a bare LF
6559 in a subsequent header line has a space inserted after it, so as not to
6560 terminate the header.
6562 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6563 unnecessarily, used atoi() instead of strtol(), and didn't check the
6564 termination when getting file sizes from file names by regex.
6566 19. Completely re-implemented the support for maildirsize files, in the light
6567 of a number of problems with the previous contributed implementation
6568 (4.30/29). In particular:
6570 . If the quota is zero, the maildirsize file is maintained, but no quota is
6573 . If the maildir directory does not exist, it is created before any attempt
6574 to write a maildirsize file.
6576 . The quota value in the file is just a cache; if the quota is changed in
6577 the transport, the new value overrides.
6579 . A regular expression is available for excluding directories from the
6582 20. The autoreply transport checks the characters in options that define the
6583 message's headers; it allows continued headers, but it was checking with
6584 isspace() after an embedded newline instead of explicitly looking for a
6587 21. If all the "regular" hosts to which an address was routed had passed their
6588 expiry times, and had not reached their retry times, the address was
6589 bounced, even if fallback hosts were defined. Now Exim should go on to try
6592 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6593 equivalent code in the SMTP transport. Some hosts send humungous responses
6594 to HELO/EHLO, more than 1024 it seems.
6596 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6597 gives compiler warnings in some environments. I've now done it "properly",
6600 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6601 (because of problems with the built-in one) was declared to return uschar *
6602 instead of char *, causing compiler failure.
6604 25. Fixed a file descriptor leak when processing alias/forward files.
6606 26. Fixed a minor format string issue in dbfn.c.
6608 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6610 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6611 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6614 29. When a sender address is verified, it is cached, to save repeating the test
6615 when there is more than one recipient in a message. However, when the
6616 verification involves a callout, it is possible for different callout
6617 options to be set for different recipients. It is too complicated to keep
6618 track of this in the cache, so now Exim always runs a verification when a
6619 callout is required, relying on the callout cache for the optimization.
6620 The overhead is duplication of the address routing, but this should not be
6623 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6624 to be verified with callout=postmaster, and the main callout worked but the
6625 postmaster check failed, the verification correctly failed. However, if a
6626 subsequent RCPT command asked for sender verification *without* the
6627 postmaster check, incorrect caching caused this verification also to fail,
6630 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6631 it was not caching the DNS options (qualify_single, search_parents) that
6632 were used when the lookup failed. A subsequent lookup with different
6633 options therefore always gave the same answer, though there were cases
6634 where it should not have. (Example: a "domains = !$mx_any" option on a
6635 dnslookup router: the "domains" option is always processed without any
6636 widening, but the router might have qualify_single set.) Now Exim uses the
6637 cached value only when the same options are set.
6639 32. Added John Jetmore's "exipick" utility to the distribution.
6641 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6642 than a timeout (e.g. a certificate is required, and is not provided), an
6643 Exim server now closes the connection immediately. Previously it waited for
6644 the client to close - but if the client is SSL, it seems that they each
6645 wait for each other, leading to a delay before one of them times out.
6647 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6648 maintained 0.8.x compatibility because I don't think many are using it, and
6649 it is clearly obsolete.
6651 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6654 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6655 client certificate was expired. A simple patch fixes this, though I don't
6656 understand the full logic of why the verify callback is called multiple
6659 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6660 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6661 which causes problems with some clients (such as the Certicom SSL Plus
6662 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6663 disables the coutermeasure allowing Eudora to connect."
6665 38. Exim was not checking that a write() to a log file succeeded. This could
6666 lead to Bad Things if a log got too big, in particular if it hit a file
6667 size limit. Exim now panics and dies if it cannot write to a log file, just
6668 as it does if it cannot open a log file.
6670 39. Modified OS/Makefile-Linux so that it now contains
6672 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6674 The two -D definitions ensure that Exim is compiled with large file
6675 support, which makes it possible to handle log files that are bigger than
6678 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6679 instance) a domain was checked against a named list that involved a lookup,
6680 causing $domain_data to be set, then another domain was checked against the
6681 same list, then the first domain was re-checked, the value of $domain_data
6682 after the final check could be wrong. In particular, if the second check
6683 failed, it could be set empty. This bug probably also applied to
6686 41. The strip_trailing_dot option was not being applied to the address given
6687 with the -f command-line option.
6689 42. The code for reading a message's header from the spool was incrementing
6690 $received_count, but never initializing it. This meant that the value was
6691 incorrect (doubled) while delivering a message in the same process in which
6692 it was received. In the most common configuration of Exim, this never
6693 happens - a fresh exec is done - but it can happen when
6694 deliver_drop_privilege is set.
6696 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6697 it now includes up to 150 characters of the unexpected data in the log
6700 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6701 and building data strings. The size of both of these buffers was 10 000
6702 bytes - far larger than anybody would *ever* want, thought I. Needless to
6703 say, somebody hit the limit. I have increased the maximum line length to
6704 20 000 and the maximum data length of concatenated lines to 100 000. I have
6705 also fixed two bugs, because there was no checking on these buffers. Tsk,
6706 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6707 buffer is too small.
6709 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6710 lsearch lookups. Now it does.
6712 46. When parsing a route_list item in a manualroute router, a fixed-length
6713 buffer was used for the list of hosts. I made this 1024 bytes long,
6714 thinking that nobody would ever have a list of hosts that long. Wrong.
6715 Somebody had a whole pile of complicated expansion conditions, and the
6716 string was silently truncated, leading to an expansion error. It turns out
6717 that it is easier to change to an unlimited length (owing to other changes
6718 that have happened since this code was originally written) than to build
6719 structure for giving a limitation error. The length of the item that
6720 expands into the list of hosts is now unlimited.
6722 47. The lsearch lookup could not handle data where the length of text line was
6723 more than 4095 characters. Such lines were truncated, leading to shortened
6724 data being returned. It should now handle lines of any length.
6726 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6727 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6730 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6731 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6732 no longer happens in comment lines. A list of replacements is now placed
6733 at the head of all of the source files, except those whose only change is
6734 to replace PERL_COMMAND in the very first #! line.
6736 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6737 messages on the queue, with a bottom-up merge sort, using code contributed
6738 by Michael Haardt. This should make operations like -bp somewhat faster on
6739 large queues. It won't affect queue runners, except when queue_run_in_order
6742 51. Installed eximstats 1.31 in the distribution.
6744 52. Added support for SRV lookups to the dnslookup router.
6746 53. If an ACL referred to $message_body or $message_body_end, the value was not
6747 reset for any messages that followed in the same SMTP session.
6749 54. The store-handling optimization for building very long strings was not
6750 differentiating between the different store pools. I don't think this
6751 actually made any difference in practice, but I've tidied it.
6753 55. While running the routers to verify a sender address, $sender_address
6754 was still set to the sender address. This is wrong, because when routing to
6755 send a bounce to the sender, it would be empty. Therefore, I have changed
6756 it so that, while verifying a sender address, $sender_address is set to <>.
6757 (There is no change to what happens when verifying a recipient address.)
6759 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6760 target A or AAAA records (if not already returned) without resetting the
6761 qualify_single or search_parents options of the DNS resolver. These are
6762 inappropriate in this case because the targets of MX and SRV records must
6763 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6764 target that, when qualified, matched something in the local domain. These
6765 two options are now turned off when doing these lookups.
6767 57. It seems that at least some releases of Reiserfs (which does not have the
6768 concept of a fixed number of inodes) returns zero and not -1 for the
6769 number of available inodes. This interacted badly with check_spool_inodes,
6770 which assumed that -1 was the "no such thing" setting. What I have done is
6771 to check that the total number of inodes is greater than zero before doing
6772 the test of how many are available.
6774 58. When a "warn" ACL statement has a log_message modifier, the message is
6775 remembered, and not repeated. This is to avoid a lot of repetition when a
6776 message has many recipients that cause the same warning to be written.
6777 However, Exim was preserving the list of already written lines for an
6778 entire SMTP session, which doesn't seem right. The memory is now reset if a
6779 new message is started.
6781 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6782 debugging output unless log_rewrite was also set.
6784 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6785 of (int)(handle) when we know that handle contains (void *)(-1).
6787 61. The Exim daemon panic-logs an error return when it closes the incoming
6788 connection. However "connection reset by peer" seems to be common, and
6789 isn't really an error worthy of noting specially, so that particular error
6792 62. When Exim is trying to find all the local interfaces, it used to panic and
6793 die if the ioctl to get the interface flags failed. However, it seems that
6794 on at least one OS (Solaris 9) it is possible to have an interface that is
6795 included in the list of interfaces, but for which you get a failure error
6796 for this call. This happens when the interface is not "plumbed" into a
6797 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6798 failure of the "get flags" call assumes that the interface is down.
6800 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6801 makes life easier for people who are doing arithmetic on fields extracted
6802 from dates, where you often get leading zeros that should not be
6803 interpreted as octal.
6805 64. Added qualify_domain to the redirect router, to override the global
6808 65. If a pathologically long header line contained very many addresses (the
6809 report of this problem mentioned 10 000) and each of them was rewritten,
6810 Exim could use up a very large amount of memory. (It kept on making new
6811 copies of the header line as it rewrote, and never released the old ones.)
6812 At the expense of a bit more processing, the header rewriting function has
6813 been changed so that it no longer eats memory in this way.
6815 66. The generation of the Received: header has been moved from the time that a
6816 message starts to be received, to the time that it finishes. The timestamp
6817 in the Received: header should now be very close to that of the <= log
6818 line. There are two side-effects of this change:
6820 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6821 logged header lines no longer include the local Received: line, because
6822 it has not yet been created. The same applies to a copy of the message
6823 that is returned to a non-SMTP sender when a message is rejected.
6825 (b) When a filter file is tested using -bf, no additional Received: header
6826 is added to the test message. After some thought, I decided that this
6829 This change does not affect the value of $received_for. It is still set
6830 after address rewriting, but before local_scan() is called.
6832 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6834 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6835 gave an unhelpful panic error message, and a defer error. I have managed to
6836 change this behaviour so that it now rejects any supplied certificate,
6837 which seems right, as the list of acceptable certificates is empty.
6839 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6840 gave an unhelpful defer error. I have not managed to make this reject any
6841 supplied certificates, but the error message it gives is "no certificate
6842 supplied", which is not helpful.
6844 70. exigrep's output now also includes lines that are not associated with any
6845 message, but which match the given pattern. Implemented by a patch from
6846 Martin Sluka, which also tidied up the Perl a bit.
6848 71. Recipient callout verification, like sender verification, was using <> in
6849 the MAIL FROM command. This isn't really the right thing, since the actual
6850 sender may affect whether the remote host accepts the recipient or not. I
6851 have changed it to use the actual sender in the callout; this means that
6852 the cache record is now keyed on a recipient/sender pair, not just the
6853 recipient address. There doesn't seem to be a real danger of callout loops,
6854 since a callout by the remote host to check the sender would use <>.
6855 [SEE ABOVE: changed after hitting problems.]
6857 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6858 temporary errors. However, in the case of such a code being given after
6859 the end of a data transmission (i.e. after ".") Exim was failing to write
6860 a retry record for the message. (Yes, there was some broken host that was
6861 actually sending 8xx at this point.)
6863 73. An unknown lookup type in a host list could cause Exim to panic-die when
6864 the list was checked. (An example that provoked this was putting <; in the
6865 middle of a list instead of at the start.) If this happened during a DATA
6866 ACL check, a -D file could be left lying around. This kind of configuration
6867 error no longer causes Exim to die; instead it causes a defer error. The
6868 incident is still logged to the main and panic logs.
6870 74. Buglet left over from Exim 3 conversion. The message "too many messages
6871 in one connection" was written to the rejectlog but not the mainlog, except
6872 when address rewriting (yes!) was being logged.
6874 75. Added write_rejectlog option.
6876 76. When a system filter was run not as root (that is, when system_filter_user
6877 was set), the values of the $n variables were not being returned to the
6878 main process; thus, they were not subsequently available in the $sn
6881 77. Added +return_path_on_delivery log selector.
6883 78. A connection timeout was being treated differently from recipients deferred
6884 when testing hosts_max_try with a message that was older than the host's
6885 retry timeout. (The host should not be counted, thus allowing all hosts to
6886 be tried at least once before bouncing.) This may have been the cause of an
6887 occasionally reported bug whereby a message would remain on the queue
6888 longer than the retry timeout, but would be bounced if a delivery was
6889 forced. I say "may" because I never totally pinned down the problem;
6890 setting up timeout/retry tests is difficult. See also the next item.
6892 79. The ultimate address timeout was not being applied to errors that involved
6893 a combination of host plus message (for example, a timeout on a MAIL
6894 command). When an address resolved to a number of possible hosts, and they
6895 were not all tried for each delivery (e.g. because of hosts_max_try), a
6896 message could remain on the queue longer than the retry timeout.
6898 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6901 81. Fixed an obscure SMTP outgoing bug which required at least the following
6902 conditions: (a) there was another message waiting for the same server;
6903 (b) the server returned 5xx to all RCPT commands in the first message so
6904 that the message was not completed; (c) the server dropped the connection
6905 or gave a negative response to the RSET that Exim sends to abort the
6906 transaction. The observed case was a dropped connection after DATA that had
6907 been sent in pipelining mode. That is, the server had advertised PIPELINING
6908 but was not implementing it correctly. The effect of the bug was incorrect
6909 behaviour, such as trying another host, and this could lead to a crash.
6915 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6916 and daemon.c were passed as pointers to ints; they should have been
6917 pointers to socklen_t variables (which are typically unsigned ints).
6919 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6922 3. Fixed a really odd bug that affected only the testing scheme; patching a
6923 certain fixed string in the binary changed the value of another string that
6924 happened to be identical to the end of the original first string.
6926 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6927 name", it returns that address as the IP address. On some operating
6928 systems (e.g. Solaris), it also passes back the IP address string as the
6929 "host name". However, on others (e.g. Linux), it passes back an empty
6930 string. Exim wasn't checking for this, and was changing the host name to an
6931 empty string, assuming it had been canonicalized.
6933 5. Although rare, it is permitted to have more than one PTR record for a given
6934 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6935 all the names associated with an address, because they do in Solaris.
6936 However, it seems that they do not in Linux for data that comes from the
6937 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6938 I found this out when I moved to a new Linux workstation and tried to run
6939 the Exim test suite.
6941 To get round this problem I have changed the code so that it now does its
6942 own call to the DNS to look up PTR records when searching for a host name.
6943 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6944 addresses that are only in /etc/hosts are still found.
6946 This behaviour is, however, controlled by an option called host_lookup_
6947 order, which defaults to "bydns:byaddr". If people want to use the other
6948 order, or indeed, just use one or the other means of lookup, they can
6949 specify it in this variable.
6951 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6952 some operating systems, this comes back from gethostbyaddr() as an empty
6953 string, and this is what Exim used to test for. However, it seems that in
6954 other systems, "." is yielded. Exim now tests for this case too.
6956 7. The values of check_spool_space and check_log_space are now held internally
6957 as a number of kilobytes instead of an absolute number of bytes. If a
6958 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6959 kilobyte. This means that much larger values can be stored.
6961 8. Exim monitor: an attempt to get the action menu when not actually pointing
6962 at a message produces an empty menu entitled "No message selected". This
6963 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6964 no entries in it ("Shell widget menu has zero width and/or height"). So I
6965 have added a single, blank menu entry in this case.
6967 9. Added ${quote_local_part.
6969 10. MIME decoding is now applied to the contents of Subject: header lines when
6972 11. Now that a reference to $sender_host_address automatically causes a reverse
6973 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6974 host lookup before query-style lookups in lists that might use this
6975 variable. This has therefore been abolished, and the "net-" prefix is no
6976 longer necessary for query-style lookups.
6978 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6979 have been a typo for LFLAGS, so it has been changed.
6981 13. The install script calls Exim with "-C /dev/null" in order to find the
6982 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6983 to be output. However, since Exim outputs its version number before the
6984 error, it didn't break the script. It just looked ugly. I fixed this by
6985 always allowing "-C /dev/null" if the caller is root.
6987 14. Ignore overlarge ACL variable number when reading spool file - insurance
6988 against a later release with more variables having written the file.
6990 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6991 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6992 this, as well as the form without the "IPv6" on the front.
6994 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6995 OS/Makefile-Darwin file.
6997 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6998 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7000 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7001 variable. However, some OS use ints for inodes. I've added cast to long int
7002 to get rid of the compiler warning.
7004 19. I had forgotten to lock out "/../" in configuration file names when
7005 ALT_CONFIG_PREFIX was set.
7007 20. Routers used for verification do not need to specify transports. However,
7008 if such a router generated a host list, and callout was configured, Exim
7009 crashed, because it could not find a port number from the (non-existent)
7010 transport. It now assumes port 25 in this circumstance.
7012 21. Added the -t option to exigrep.
7014 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7015 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7016 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7017 them is set, LOOKUP_LSEARCH is forced.
7019 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7021 24. Added sender and host information to the "rejected by local_scan()" log
7022 line; previously there was no indication of these.
7024 25. Added .include_if_exists.
7026 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7027 Linux. It turns out that not all file systems support this. Apparently some
7028 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7029 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7030 not supported on the file descriptor, is now ignored when Exim is trying to
7031 sync a directory. This applies only to Linux.
7033 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7035 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7036 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7039 29. Added support for maildirsize files from supplied patch (modified a bit).
7041 30. The use of :fail: followed by an empty string could lead Exim to respond to
7042 sender verification failures with (e.g.):
7044 550 Verification failed for <xxx>
7045 550 Sender verify failed
7047 where the first response line was missing the '-' that indicates it is not
7048 the final line of the response.
7050 31. The loop for finding the name of the user that called Exim had a hardwired
7051 limit of 10; it now uses the value of finduser_retries, which is used for
7052 all other user lookups.
7054 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7057 33. Exim was neglecting to zero errno before one call of strtol() when
7058 expanding a string and expecting an integer value. On some systems this
7059 resulted in spurious "integer overflow" errors. Also, it was casting the
7060 result into an int without checking.
7062 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7063 did not work. The code looks as if it has *never* worked, though it appears
7064 to have been documented since at least release 1.62. I have made it work.
7066 35. The "timeout_DNS" error in retry rules, also documented since at least
7067 1.62, also never worked. As it isn't clear exactly what this means, and
7068 clearly it isn't a major issue, I have abolished the feature by treating it
7069 as "timeout", and writing a warning to the main and panic logs.
7071 36. The display of retry rules for -brt wasn't always showing the error code
7074 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7075 timeout_connect_A, timeout_connect_MX.
7077 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7078 to the empty sender.
7080 39. The daemon was not analysing the content of -oX till after it had closed
7081 stderr and disconnected from the controlling terminal. This meant that any
7082 syntax errors were only noted on the panic log, and the return code from
7083 the command was 0. By re-arranging the code a little, I've made the
7084 decoding happen first, so such errors now appear on stderr, and the return
7085 code is 1. However, the actual setting up of the sockets still happens in
7086 the disconnected process, so errors there are still only recorded on the
7089 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7090 connections (as happens on some IP stacks) was logged at start up time as
7091 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7092 it from "IPv6 and IPv4", which means that two separate sockets are being
7095 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7096 says whether AF_INET or AF_INET6 was passed as an argument.
7098 42. Exiwhat output was messed up when time zones were included in log
7101 43. Exiwhat now gives more information about the daemon's listening ports,
7102 and whether -tls-on-connect was used.
7104 44. The "port" option of the smtp transport is now expanded.
7106 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7107 silently ignored. Now an error message is written to the main and panic
7110 46. There's a new ACL modifier called "logwrite" which writes to a log file
7111 as soon as it is encountered.
7113 47. Added $local_user_uid and $local_user_gid at routing time.
7115 48. Exim crashed when trying to verify a sender address that was being
7118 49. Exim was recognizing only a space character after ".include". It now also
7119 recognizes a tab character.
7121 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7122 extracting the relevant information from the specification. The man page no
7123 longer contains scrambled data for the -d option, and I've added a section
7124 at the front about calling Exim under different names.
7126 51. Added "extra_headers" argument to the "mail" command in filter files.
7128 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7131 53. Installed eximstats 1.29.
7133 54. Added transport_filter_timeout as a generic transport option.
7135 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7136 Cc: header lines. This was required by RFC 822, but it not required by RFC
7139 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7140 incoming messages that did not have them. Now it does so only if the
7141 message originates locally, that is, if there is no associated remote host
7142 address. When Resent- header lines are present, this applies to the Resent-
7143 lines rather than the non-Resent- lines.
7145 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7146 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7148 58. Messages for configuration errors now include the name of the main
7149 configuration file - useful now that there may be more than one file in a
7150 list (.included file names were always shown).
7152 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7153 for those rare installations that do not start the daemon as root or run it
7154 setuid root. I've cut out the call to initgroups() if the daemon is not
7157 60. The Exim user and group can now be bound into the binary as text strings
7158 that are looked up at the start of Exim's processing.
7160 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7162 62. Added $mailstore_basename variable.
7164 63. Installed patch to sieve.c from Michael Haardt.
7166 64. When Exim failed to open the panic log after failing to open the main log,
7167 the original message it was trying to log was written to stderr and debug
7168 output, but if they were not available (the usual case in production), it
7169 was lost. Now it is written to syslog before the two lines that record the
7170 failures to open the logs.
7172 65. Users' Exim filters run in subprocesses under the user's uid. It is
7173 possible for a "deliver" command or an alias in a "personal" command to
7174 provoke an address rewrite. If logging of address rewriting is configured,
7175 this fails because the process is not running as root or exim. There may be
7176 a better way of dealing with this, but for the moment (because 4.30 needs
7177 to be released), I have disabled address rewrite logging when running a
7178 filter in a non-root, non-exim process.
7184 1. The buildconfig auxiliary program wasn't quoting the value set for
7185 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7186 not defined. This bug was masked in 4.22 by the effect that was fixed in
7189 2. Some messages that were rejected after a message id was allocated were
7190 shown as "incomplete" by exigrep. It no longer does this for messages that
7191 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7193 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7194 have allow_domain_literals set, the ID did not get logged in the <= line.
7195 Domain literals are now always recognized in Message-ID: header lines.
7197 4. The first argument for a ${extract expansion item is the key name or field
7198 number. Leading and trailing spaces in this item were not being ignored,
7199 causing some misleading effects.
7201 5. When deliver_drop_privilege was set, single queue runner processes started
7202 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7203 same command in the process it spins off) were not dropping privilege.
7205 6. When the daemon running as "exim" started a queue runner, it always
7206 re-executed Exim in the spun-off process. This is a waste of effort when
7207 deliver_drop_privilege is set. The new process now just calls the
7208 queue-runner function directly.
7214 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7217 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7218 ignored. Though the use of -oP was forcing the writing of a pid file, it
7219 was always written to the default place.
7221 3. If the message "no IP address found for host xxxx" is generated during
7222 incoming verification, it is now followed by identification of the incoming
7223 connection (so you can more easily find what provoked it).
7225 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7227 5. Added some features to "harden" Exim a bit more against certain attacks:
7229 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7230 be put in Local/Makefile. This is like the never_users runtime option,
7231 but it cannot be overridden. The default setting is "root".
7233 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7234 prefix string with which any file named in a -C command line option
7237 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7238 is retained for -C and -D only if the caller of Exim is root. Without
7239 it, the exim user may also use -C and -D and retain privilege.
7241 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7242 command line option is disabled.
7244 6. Macro names set by the -D option must start with an upper case letter, just
7245 like macro names defined in the configuration file.
7247 7. Added "dereference=" facility to LDAP.
7249 8. Two instances of the typo "uknown" in the source files are fixed.
7251 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7252 the Configure-Makefile script screwed up while processing it.
7254 10. Incorporated PCRE 4.4.
7256 11. The SMTP synchronization check was not operating right at the start of an
7257 SMTP session. For example, it could not catch a HELO sent before the client
7258 waited for the greeting. There is now a check for outstanding input at the
7259 point when the greeting is written. Because of the duplex, asynchronous
7260 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7261 way, but not yet received, when the check is performed.
7263 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7264 on TCP/IP sockets, because this apparently causes some broken clients to
7267 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7268 unchanged) from the Cygwin maintainer.
7270 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7271 was supported instead of testing for mbx. Effectively a typo.
7273 15. The spa authenticator server code was not checking that the input it
7274 received was valid base64.
7276 16. The debug output line for the "set" modifier in ACLs was not showing the
7277 name of the variable that was being set.
7279 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7281 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7282 lookup on its own. Something else was needed to trigger the lookup. For
7283 example, a match in host_lookup or the need for a host name in a host list.
7284 Now, if $sender_host_name is referenced and the host name has not yet been
7285 looked up, a lookup is performed. If the lookup fails, the variable remains
7286 empty, and $host_lookup_failed is set to "1".
7288 19. Added "eqi" as a case-independent comparison operator.
7290 20. The saslauthd authentication condition could segfault if neither service
7291 nor realm was specified.
7293 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7294 error message that was logged was misleading, and incoming SMTP
7295 connections were dropped. The message is now more accurate, and temporary
7296 errors are given to SMTP connections.
7298 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7299 (except RSET) with a 421 error, until QUIT is received. However, it was
7300 failing to send a response to QUIT.
7302 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7303 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7304 ACL is now run after the helo_try_verify_hosts code.
7306 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7307 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7308 case-independent, so other case variants are also recognized). Apparently
7309 some systems use these upper case variants.
7311 25. If more than two messages were waiting for the same host, and a transport
7312 filter was specified for the transport, Exim sent two messages over the
7313 same TCP/IP connection, and then failed with "socket operation on non-
7314 socket" when it tried to send the third.
7316 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7318 27. The extern definition of crypt16() in expand.c was not being excluded when
7319 the OS had its own crypt16() function.
7321 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7322 as a preferred synonym for return_size_limit, both as an option and as an
7325 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7327 30. Changed the default configuration ACL to relax the local part checking rule
7328 for addresses that are not in any local domains. For these addresses,
7329 slashes and pipe symbols are allowed within local parts, but the sequence
7330 /../ is explicitly forbidden.
7332 31. SPA server authentication was not clearing the challenge buffer before
7335 32. log_message in a "warn" ACL statement was writing to the reject log as
7336 well as to the main log, which contradicts the documentation and doesn't
7337 seem right (because no rejection is happening). So I have stopped it.
7339 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7340 However, I am unable to do any testing of this.
7342 34. Fixed an infelicity in the appendfile transport. When checking directories
7343 for a mailbox, to see if any needed to be created, it was accidentally
7344 using path names with one or more superfluous leading slashes; tracing
7345 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7347 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7348 contents are added to the log line that is written for every discarded
7349 recipient. (Previously a log_message setting was ignored.)
7351 36. The ${quote: operator now quotes the string if it is empty.
7353 37. The install script runs exim in order to find its version number. If for
7354 some reason other than non-existence or emptiness, which it checks, it
7355 could not run './exim', it was installing it with an empty version number,
7356 i.e. as "exim-". This error state is now caught, and the installation is
7359 38. An argument was missing from the function that creates an error message
7360 when Exim fails to connect to the socket for saslauthd authentication.
7361 This could cause Exim to crash, or give a corrupted message.
7363 39. Added isip, isip4, and isip6 to ${if conditions.
7365 40. The ACL variables $acl_xx are now saved with the message, and can be
7366 accessed later in routers, transports, and filters.
7368 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7369 strings in the file are not string-expanded.
7371 42. If a MAIL command specified a SIZE value that was too large to fit into an
7372 int variable, the check against message_size_limit failed. Such values are
7373 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7374 day this will have to be increased, but I don't think I want to be around
7375 when emails are that large.
7382 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7383 iconv() is not standard in FreeBSD.
7385 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7386 IPv6 enabled. The observed symptom was a segmentation fault on return from
7387 the function os_common_find_running_interfaces() in src/os.c.
7389 3. In the check_special_case() function in daemon.c I had used "errno" as an
7390 argument name, which causes warnings on some systems. This was basically a
7391 typo, since it was named "eno" in the comments!
7393 4. The code that waits for the clock to tick (at a resolution of some fraction
7394 of a second) so as to ensure message-id uniqueness was always waiting for
7395 at least one whole tick, when it could have waited for less. [This is
7396 almost certainly not relevant at current processor speeds, where it is
7397 unlikely to ever wait at all. But we try to future-proof.]
7399 5. The function that sleeps for a time interval that includes fractions of a
7400 second contained a race. It did not block SIGALRM between setting the
7401 timer, and suspending (a couple of lines later). If the interval was short
7402 and the sigsuspend() was delayed until after it had expired, the suspension
7403 never ended. On busy systems this could lead to processes getting stuck for
7406 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7407 process, before it forks any delivery processes. The open lookup caching
7408 mechanism meant that the open file or database connection was passed into
7409 the delivery process. The problem was that delivery processes always tidy
7410 up cached lookup data. This could cause a problem for the next delivery
7411 process started by the queue runner, because the external queue runner
7412 process does not know about the closure. So the next delivery process
7413 still has data in the lookup cache. In the case of a file lookup, there was
7414 no problem because closing a file descriptor in a subprocess doesn't affect
7415 the parent. However, if the lookup was caching a connection to a database,
7416 the connection was closed, and the second delivery process was likely to
7417 see errors such as "PGSQL: query failed: server closed the connection
7418 unexpectedly". The problem has been fixed by closing all cached lookups
7419 in a queue runner before running a delivery process.
7421 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7422 seem to have the "const" qualifier which it has on other OS. I've
7425 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7426 *of the same type* (client or server) with the same public name that an
7427 error should be diagnosed.
7429 9. When Exim looked up a host name for an IP address, but failed to find the
7430 original IP address when looking up the host name (a safety check), it
7431 output the message "<ip address> does not match any IP for NULL", which was
7432 confusing, to say the least. The bug was that the host name should have
7433 appeared instead of "NULL".
7435 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7436 user that is built into the binary, and the -C or -D options is used, root
7437 privilege is dropped before the configuration file is read. In addition,
7438 logging is switched to stderr instead of the normal log files. If the
7439 configuration then re-defines the Exim user, the unprivileged environment
7440 is probably not what is expected, so Exim logs a panic warning message (but
7443 However, if deliver_drop_privilege is set, the unprivileged state may well
7444 be exactly what is intended, so the warning has been cut out in that case,
7445 and Exim is allowed to try to write to its normal log files.
7451 1. smtp_return_error_details was not giving details for temporary sender
7452 or receiver verification errors.
7454 2. Diagnose a configuration error if two authenticators have the same public
7457 3. Exim used not to create the message log file for a message until the first
7458 delivery attempt. This could be confusing when incoming messages were held
7459 for policy or load reasons. The message log file is now created at the time
7460 the message is received, and an initial "Received" line is written to it.
7462 4. The automatically generated man page for command line options had a minor
7463 bug that caused no ill effects; however, a more serious problem was that
7464 the procedure for building the man page automatically didn't always
7465 operate. Consequently, release 4.20 contains an out-of-date version. This
7466 shouldn't happen again.
7468 5. When building Exim with embedded Perl support, the script that builds the
7469 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7470 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7472 6. The freeze_tell option was not being used for messages that were frozen on
7473 arrival, either by an ACL or by local_scan().
7475 7. Added the smtp_incomplete_transaction log selector.
7477 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7478 was accepting AUTH without a new EHLO.
7480 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7481 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7484 10. Logging of TCP/IP connections (when configured) now happens in the main
7485 daemon process instead of the child process, so that the TCP/IP connection
7486 count is more accurate (but it can never be perfect).
7488 11. The use of "drop" in a nested ACL was not being handled correctly in the
7489 outer ACL. Now, if condition failure induced by the nested "drop" causes
7490 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7491 or "require"), the connection is dropped.
7493 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7494 that yield "discard" can now be used with an "accept" or a "discard" verb,
7495 but an error is generated for any others (because I can't see a useful way
7496 to define what should happen).
7498 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7499 are now processed in the same way as lines in the Exim configuration file.
7500 In particular, continuation lines are supported.
7502 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7504 15. Added -ti meaning -t -i.
7506 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7507 domains, and warn by logging if others are found.
7509 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7510 returned from GIFCONF when Exim is trying to find the list of interfaces on
7511 a host. The code in os.c has been modified to copy each ifreq to an aligned
7512 structure in all cases.
7514 Also, in some cases, the returned ifreq's were being copied to a 'struct
7515 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7516 means the last couple of bytes of an IPv6 address could be chopped if the
7517 ifreq contained only a normal sockaddr (14 bytes storage).
7519 18. Named domain lists were not supported in the hosts_treat_as_local option.
7520 An entry such as +xxxx was not recognized, and was treated as a literal
7523 19. Ensure that header lines added by a DATA ACL are included in the reject log
7524 if the ACL subsequently rejects the message.
7526 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7527 MD5 (which is deprecated).
7529 21. When testing a filter file using -bf, Exim was writing a message when it
7530 took the sender from a "From " line in the message, but it was not doing so
7531 when it took $return_path from a Return-Path: header line. It now does.
7533 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7534 with a valid header line field name (a series of printing characters
7535 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7537 23. Changed "disc" in the source to "disk" to conform to the documentation and
7538 the book and for uniformity.
7540 24. Ignore Sendmail's -Ooption=value command line item.
7542 25. When execve() failed while trying to run a command in a pipe transport,
7543 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7544 could be confused with a return value of 69 from the command itself. This
7545 has been changed to 127, the value the shell returns if it is asked to run
7546 a non-existent command. The wording for the related log line suggests a
7547 non-existent command as the problem.
7549 26. If received_header_text expands to an empty string, do not add a Received:
7550 header line to the message. (Well, it adds a token one on the spool, but
7551 marks it "old" so that it doesn't get used or transmitted.)
7553 27. Installed eximstats 1.28 (addition of -nt option).
7555 28. There was no check for failure on the call to getsockname() in the daemon
7556 code. This can fail if there is a shortage of resources on the system, with
7557 ENOMEM, for example. A temporary error is now given on failure.
7559 29. Contrary to the C standard, it seems that in some environments, the
7560 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7561 program. Exim now does this explicitly; it affects the formatting of
7562 timestamps using strftime().
7564 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7565 complaints. I've now initialized all the variables, to avoid this.
7567 32. Header lines added by a system filter were not being "seen" during
7568 transport-time rewrites.
7570 33. The info_callback() function passed to OpenSSL is set up with type void
7571 (*)(SSL *, int, int), as described somewhere. However, when calling the
7572 function (actually a macro) that sets it up, the type void(*)() is
7573 expected. I've put in a cast to prevent warnings from picky compilers.
7575 34. If a DNS black list lookup found a CNAME record, but there were no A
7576 records associated with the domain it pointed at, Exim crashed.
7578 35. If a DNS black list lookup returned more than one A record, Exim ignored
7579 all but the first. It now scans all returned addresses if a particular IP
7580 value is being sought. In this situation, the contents of the
7581 $dnslist_value variable are a list of all the addresses, separated by a
7584 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7585 to accept a host name and all its aliases if the forward lookup for any of
7586 them yielded the IP address of the incoming connection. Now it accepts only
7587 those names whose forward lookup yields the correct IP address. Any other
7588 names are discarded. This closes a loophole whereby a rogue DNS
7589 administrator could create reverse DNS records to break through a
7590 wildcarded host restriction in an ACL.
7592 37. If a user filter or a system filter that ran in a subprocess used any of
7593 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7594 the wrong values were passed to the pipe command ($thisaddress had the
7595 value of $0, $0 had the value of $1, etc). This bug was introduced by
7596 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7598 38. Improved the line breaking for long SMTP error messages from ACLs.
7599 Previously, if there was no break point between 40 and 75 characters, Exim
7600 left the rest of the message alone. Two changes have been made: (a) I've
7601 reduced the minimum length to 35 characters; (b) if it can't find a break
7602 point between 35 and 75 characters, it looks ahead and uses the first one
7603 that it finds. This may give the occasional overlong line, but at least the
7604 remaining text gets split now.
7606 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7607 file descriptors might be low, and that setting 1000 would always raise it.
7608 It turns out that in some environments, the limit is already over 1000 and
7609 that lowering it causes trouble. So now Exim takes care not to decrease it.
7611 40. When delivering a message, the value of $return_path is set to $sender_
7612 address at the start of routing (routers may change the value). By an
7613 oversight, this default was not being set up when an address was tested by
7614 -bt or -bv, which affected the outcome if any router or filter referred to
7617 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7618 log only when "message" or "log_message" are set. However, if one of the
7619 conditions was an address verification, or a call to a nested ACL, the
7620 messages generated by the underlying test were being passed through. This
7621 no longer happens. The underlying message is available in $acl_verify_
7622 message for both "message" and "log_message" expansions, so it can be
7623 passed through if needed.
7625 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7626 new expansion $bh_ to give the encoded byte string without charset
7627 translation. Translation happens only if iconv() is available; HAVE_ICONV
7628 indicates this at build time. HEADERS_CHARSET gives the charset to
7629 translate to; headers_charset can change it in the configuration, and
7630 "headers charset" can change it in an individual filter file.
7632 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7633 that creates RFC 2047 encoded "words" labels them as that charset instead
7634 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7635 expansion operator; (ii) when Exim creates a From: line for a local
7636 message; (iii) when a header line is rewritten to include a "phrase" part.
7638 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7639 buggy, causing it to skip the first lines of messages whose message ID
7640 ended in 'D'. This would not have bitten before Exim release 4.14, because
7641 message IDs were unlikely to end in 'D' before then. The effect was to have
7642 incorrect size information for certain domains.
7644 45. #include "config.h" was missing at the start of the crypt16.c module. This
7645 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7648 46. If there was a timeout during a "random" callout check, Exim treated it as
7649 a failure of the random address, and carried on sending RSET and the real
7650 address. If the delay was just some slowness somewhere, the response to the
7651 original RCPT would be taken as a response to RSET and so on, causing
7652 mayhem of various kinds.
7654 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7655 when I implemented it. It didn't allow for the fact that some option values
7656 may legitimately be negative (e.g. size_addition), and it didn't even do
7657 the right test for positive values.
7659 48. Domain names in DNS records are case-independent. Exim always looks them up
7660 in lower case. Some resolvers return domain names in exactly the case they
7661 appear in the zone file, that is, they may contain uppercase letters. Not
7662 all resolvers do this - some return always lower case. Exim was treating a
7663 change of case by a resolver as a change of domain, similar to a widening
7664 of a domain abbreviation. This triggered its re-routing code and so it was
7665 trying to route what was effectively the same domain again. This normally
7666 caused routing to fail (because the router wouldn't handle the domain
7667 twice). Now Exim checks for this case specially, and just changes the
7668 casing of the domain that it ultimately uses when it transmits the message
7671 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7674 50. If a filter generated a file delivery with a non-absolute name (possible if
7675 no home directory exists for the router), the forbid_file option was not
7678 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7679 the existing equality matching.
7681 52. Exim was using ints instead of ino_t variables in some places where it was
7682 dealing with inode numbers.
7684 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7685 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7686 called TMPDIR, and if it finds it is different, it changes its value.
7688 54. The smtp_printf() function is now made available to local_scan() so
7689 additional output lines can be written before returning. There is also an
7690 smtp_fflush() function to enable the detection of a dropped connection.
7691 The variables smtp_input and smtp_batched_input are exported to
7694 55. Changed the default runtime configuration: the message "Unknown user"
7695 has been removed from the ACL, and instead placed on the localuser router,
7696 using the cannot_route_message feature. This means that any verification
7697 failures that generate their own messages won't get overridden. Similarly,
7698 the "Unrouteable address" message that was in the ACL for unverifiable
7699 relay addresses has also been removed.
7701 56. Added hosts_avoid_esmtp to the smtp transport.
7703 57. The exicyclog script was not checking for the esoteric option
7704 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7705 will work only if exicyclog is run under the appropriate euid.
7707 58. Following a discussion on the list, the rules by which Exim recognises line
7708 endings on incoming messages have been changed. The -dropcr and drop_cr
7709 options are now no-ops, retained only for backwards compatibility. The
7710 following line terminators are recognized: LF CRLF CR. However, special
7711 processing applies to CR:
7713 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7714 nor a local message in the state where . is a terminator.
7716 (ii) If a bare CR is encountered in a header line, an extra space is added
7717 after the line terminator so as not to end the header. The reasoning
7718 behind this is that bare CRs in header lines are most likely either
7719 to be mistakes, or people trying to play silly games.
7721 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7722 was being incorrectly given as 18 bytes larger than it should have been.
7723 This is a VOB (very old bug).
7725 60. This may never have affected anything current, but just in case it has:
7726 When the local host is found other than at the start of a list of hosts,
7727 the local host, those with the same MX, and any that follow, are discarded.
7728 When the list in question was part of a longer list of hosts, the following
7729 hosts (not currently being processed) were also being discarded. This no
7730 longer happens. I'm not sure if this situation could ever has previously
7733 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7736 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7737 header. This is something that is recommended in a new Internet Draft, and
7738 is something that is documented as being done by Sendmail. There are two
7739 possible values. For messages generated by the autoreply transport, Exim
7742 Auto-Submitted: auto-replied
7744 whereas for all other generated messages (e.g. bounces) it adds
7746 Auto-Submitted: auto-generated
7748 63. The "personal" condition in filters now includes a test for the
7749 Auto-Submitted: header. If it contains the string "auto-" the message it
7750 not considered personal.
7752 64. Added rcpt_include_affixes as a generic transport option.
7754 65. Added queue_only_override (default true).
7756 66. Added the syslog_duplication option.
7758 67. If what should have been the first header line of a message consisted of
7759 a space followed by a colon, Exim was mis-interpreting it as a header line.
7760 It isn't of course - it is syntactically invalid and should therefore be
7761 treated as the start of the message body. The misbehaviour could have
7762 caused a number of strange effects, including loss of data in subsequent
7763 header lines, and spool format errors.
7765 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7766 client host had authenticated. This control can now be exercised by an ACL
7767 for more flexibility.
7769 69. By default, callouts do not happen when testing with -bh. There is now a
7770 variant, -bhc, which does actually run the callout code, including
7771 consulting and updating the callout cache.
7773 70. Added support for saslauthd authentication, courtesy of Alexander
7776 71. If statvfs() failed on the spool or log directories while checking their
7777 size for availability, Exim confusingly gave the error "space shortage".
7778 Furthermore, in debugging mode it crashed with a floating point exception.
7779 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7780 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7781 serious problem, Exim now writes to the main and panic logs when this
7782 happens, with details of the failure. It then refuses to accept the
7783 incoming message, giving the message "spool directory problem" or "log
7784 directory problem" with a 421 code for SMTP messages.
7786 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7787 0, 1, and 2 exist, because some OS complain for execs without them (see
7788 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7789 descriptors. However, the code omitted to check that the open succeeded,
7790 causing mysterious errors if for some reason the permissions on /dev/null
7791 got screwed. Now Exim writes a message to the main and panic logs, and
7792 bombs out if it can't open /dev/null.
7794 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7795 interact so that it is all more flexible. It is supposed to remain
7796 backwards compatible. Also added extra_local_interfaces.
7798 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7799 to bomb out with an assertion failure - to the client this appears as a
7800 connection drop. This problem occurs in the part of the code that was taken
7801 from the Samba project. Fortunately, the assertion is in a very simple
7802 function, so I have fixed this by reproducing the function inline in the
7803 one place where it is called, and arranging for authentication to fail
7804 instead of killing the process with assert().
7806 75. The SPA client code was not working when the server requested OEM rather
7807 than Unicode encoding.
7809 76. Added code to make require_files with a specific uid setting more usable in
7810 the case where statting the file as root fails - usually a non-root-mounted
7811 NFS file system. When this happens and the failure is EACCES, Exim now
7812 forks a subprocess and does the per-uid checking as the relevant uid.
7814 77. Added process_log_path.
7816 78. If log_file_path was not explicitly set, a setting of check_log_space or
7817 check_log_inodes was ignored.
7819 79. If a space check for the spool or log partitions fails, the incident is now
7820 logged. Of course, in the latter case the data may get lost...
7822 80. Added the %p formatting code to string_format() so that it can be used to
7823 print addresses in debug_print(). Adjusted all the address printing in the
7824 debugging in store.c to use %p rather than %d.
7826 81. There was a concern that a line of code in smtp_in.c could overflow a
7827 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7828 initially expressed, the concern was not well-founded, because trailing
7829 spaces are removed early. However, if the trailing spaces were followed by
7830 a NULL, they did not get removed, so the overflow was possible. Two fixes
7833 (a) I re-wrote the offending code in a cleaner fashion.
7834 (b) If an incoming SMTP command contains a NULL character, it is rejected
7837 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7838 runs initgroups(), so that if the Exim user is in any additional groups,
7839 they will be used during message reception.
7845 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob