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.
62 JH/01 Avoid costly startup code when not strictly needed. This reduces time
63 for some exim process initialisations. It does mean that the logging
64 of TLS configuration problems is only done for the daemon startup.
66 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
68 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
69 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
72 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
73 DKIM signing is being done. Previously a transport_filter would always
74 disable CHUNKING, falling back to traditional DATA.
76 JH/05 Regard command-line receipients as tainted.
78 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
80 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
81 PAM library frees one of the arguments given to it, despite the
82 documentation. Therefore a plain malloc must be used.
84 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
85 on-stack buffers were used, resulting in a taint trap when DSN information
86 copied from a received message was written into the buffer.
88 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
89 the ordering of its ARC headers. This caused a crash.
91 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
92 a new record was being constructed with information from the peer, a trap
95 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
96 installation would get error messages from DMARC verify, when it hit the
97 nonexistent file indicated by the default. Distros wanting DMARC enabled
98 should both provide the file and set the option.
99 Also enforce no DMARC verification for command-line sourced messages.
101 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
102 could, depending on the platform, hang at the STARTTLS response.
104 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
105 message on a connection. Previously if one message had ARC headers and
106 the following one did not, a crash could result when adding an
107 Authentication-Results: header.
109 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
110 Exim main code and Exim-related utities. The introduction of taint
111 tracking also did many adjustments to string handling. Since then, eximon
112 frequently terminated with an assert failure.
114 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
115 check for 452 responses. This slightly helps the inefficieny of doing
116 a large alias-expansion into a recipient-limited target. The max_rcpt
117 transport option still applies (and at the current default, will override
118 the new feature). The check is done for either cause of synch, and forces
119 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
120 connection. The new facility is not tunable at this time.
122 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
123 library live data was being used, so the results became garbage. Make
124 copies while it is still usable.
126 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
127 on delivery deferred (==) and failed (**) lines (if a delivery was
128 attemtped). Previously it was only on completion (=>) lines.
130 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
131 for the expansion of the server_scram_iter and server_scram_salt options.
133 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
134 are now specifically given a NO_DATA response without hitting the system
135 resolver. The library goes on to do the now-standard TXT lookup.
136 Use of dnsdb lookups is not affected.
138 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
139 only retrieve the errormessage once. Previously two calls to dlerror()
140 were used, and the second one (for mainlog/paniclog) retrieved null
143 JH/20 Taint checking: disallow use of tainted data for
144 - the appendfile transport file and directory options
145 - the pipe transport command
146 - the autoreply transport file, log and once options
147 - file names used by the redirect router (including filter files)
149 - paths used by single-key lookups
150 Previously this was permitted.
152 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
153 adjusted the size of a major service buffer; this failed because the
154 buffer was in use at the time. Change to a compile-time increase in the
155 buffer size, when this authenticator is compiled into exim.
157 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
158 previous fast-mode was untenable in the face of glibs using mmap to
159 support larger malloc requests.
161 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
162 New values supported, if defined on system where compiled:
163 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
164 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
166 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
167 running a limited number of proceses in parallel, a benefit is gained. The
168 amount varies with the platform hardware and load. The use of the option
169 queue_run_in_order means we cannot do this, as ordering becomes
172 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
173 had introduced a string-copy (for ensuring NUL-termination) which was not
174 appropriate for that case, which can include embedded NUL bytes in the
175 block of data. Investigation showed the copy to actually be needless, the
176 data being length-specified.
178 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
179 done during a receiving connection, and both used TLS, global info was
180 used rather than per-connection info for tracking the state of data
181 queued for transmission. This could result in a connection hang.
183 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
184 Previously, when delivering serveral messages down a single connection
185 only the first would provide a SIZE. This was due to the size information
186 not being properly tracked.
188 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
189 TAI (at 37 seconds currently), pretend to be in UTC for time-related
190 expansion and logging. Previously, spurious values such as a future
191 minute could be seen.
193 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
194 it could crash from a null-deref. This could also affect the
195 ${addresses: } operator and ${readsock } item.
197 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
198 message following a mime one, the variable was not reset.
200 JH/30 When an pipelined-connect fails at the first response, assume incorrect
201 cached capability (perhaps the peer reneged?) and immediately retry in
204 JH/31 Fix spurious detection of timeout while writing to transport filter.
206 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
207 an attempt to copy the string was made before checking it.
209 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
210 taint of the lookup key was maintained; we now regard the presence in the
211 filesystem as sufficient validation.
213 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
214 argument is supplied.
216 JH/35 The dsearch lookup now requires that the directory is an absolute path.
217 Previously this was not checked, and nonempty relative paths made an
218 access under Exim's current working directory.
220 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
221 Previously no event was raised.
223 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
224 parameter supplied by the sender MAIL FROM command. Previously it was
225 ignored, and only the check_spool_space option value for the required
228 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
229 the size of the signing public-key. Previously it was instead giving
230 the size of the signature hash.
232 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
233 the default. See the (new) dkim_verify_min_keysizes option.
235 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
236 and an ACL use a lookup for checking either the local_part or domain,
237 stale data could be accessed. Ensure that variable references are
238 dropped between messages.
240 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
241 by the client was not checked as pointing within response data before
242 being used. A malicious client could thus cause an out-of-bounds read and
243 possibly gain authentication. Fix by adding the check.
245 JH/42 Internationalisation: change the default for downconversion in the smtp
246 transport to be "if needed". Previously it was "as previously set" for
247 the message, which usually meant "if needed" for message-submission but
248 "no" for everything else. However, MTAs have been seen using SMTPUTF8
249 even when the envelope addresses did not need it, resulting in forwarding
250 failures to non-supporting MTAs. A downconvert in such cases will be
251 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
252 transport. The change does mean that addresses needing conversion will
253 be converted when previously a delivery failure would occur.
255 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
256 response was received it would be used unchecked in a fail-DSN, violating
257 standards on line-length limits. Truncate if needed.
259 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
260 doesn't work. (Additionally add a new main config option to configure the
267 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
268 side, to decode a TLS 1.3 packet capture.
270 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
271 Previously the default library behaviour applied, sending two, each in
274 JH/03 Debug output for ACL now gives the config file name and line number for
277 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
279 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
281 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
282 buffer overrun for (non-chunking) other transports.
284 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
285 TLS1.3, means that a server rejecting a client certificate is not visible
286 to the client until the first read of encrypted data (typically the
287 response to EHLO). Add detection for that case and treat it as a failed
288 TLS connection attempt, so that the normal retry-in-clear can work (if
289 suitably configured).
291 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
292 and/or domain. Found and fixed by Jason Betts.
294 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
295 configuration). If a CNAME target was not a wellformed name pattern, a
298 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
299 the OS reports them interleaved with other addresses.
301 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
302 used both for input and for a verify callout, both encrypted, SMTP
303 responses being sent by the server could be lost. This resulted in
304 dropped connections and sometimes bounces generated by a peer sending
307 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
308 string. Previously it was possible to cause undefined behaviour in a
309 library routine (usually a crash). Found by "zerons".
311 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
314 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
315 API was removed, so update to use the newer ones.
317 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
318 any timeout set, is taking a long time. Previously we would hang on to a
319 rotated logfile "forever" if the input was arriving with long gaps
320 (a previous attempt to fix addressed lack, for a long time, of initial
323 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
324 shared (NFS) environment. The length of the tempfile name is now
325 4 + 16 ("hdr.$message_exim_id") which might break on file
326 systems which restrict the file name length to lower values.
329 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
330 shared (NFS) environment.
332 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
333 did for all versions <4.90). Notably -M, -m, --invert, -I may be
336 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
337 on some platforms for bit 31.
339 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
340 to changes apparently associated with TLS1.3 handling some of the APIs
341 previously used were either nonfunctional or inappropriate. Strings
342 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
343 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
344 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
345 This affects log line X= elements, the $tls_{in,out}_cipher variables,
346 and the use of specific cipher names in the encrypted= ACL condition.
348 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
350 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
351 verification result was not updated unless hosts_require_ocsp applied.
353 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
354 queue_list_requires_admin set to false, non-admin users were denied the
357 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
358 directory-of-certs mode. Previously they were advertised despite the
361 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
362 A single TCP connection by a client will now hold a TLS connection open
363 for multiple message deliveries, by default. Previously the default was to
366 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
367 default. If built with the facility, DANE will be used. The facility
368 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
370 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
371 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
372 must be defined and you must still, unless you define DISABLE_TLS, manage
373 the the include-dir and library-file requirements that go with that
374 choice. Non-TLS builds are still supported.
376 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
379 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
380 default. If the platform supports and has the facility enabled, it will
381 be requested on all coneections.
383 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
384 controlled by the build-time option SUPPORT_PIPE_CONNECT.
386 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
388 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
389 success-DSN messages. Previously the From: header was always the default
390 one for these; the option was ignored.
392 JH/28 Fix the timeout on smtp response to apply to the whole response.
393 Previously it was reset for every read, so a teergrubing peer sending
394 single bytes within the time limit could extend the connection for a
395 long time. Credit to Qualsys Security Advisory Team for the discovery.
397 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
398 delivery address, which leaked information of the results of local
399 forwarding. Change to the original envelope recipient address, per
402 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
403 requested. Previously not bounce was generated and a log entry of
404 error ignored was made.
406 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
408 JH/32 Introduce a general tainting mechanism for values read from the input
409 channel, and values derived from them. Refuse to expand any tainted
410 values, to catch one form of exploit.
412 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
413 was unused and the unexpanded text used for the test. Found and
414 fixed by Ruben Jenster.
416 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
417 an attempt to use a TLS library read routine dereffed a nul pointer,
420 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
421 them in our smtp response.
423 JH/36 Have the general router option retry_use_local_part default to true when
424 any of the restrictive preconditions are set (to anything). Previously it
425 was only for check_local user. The change removes one item of manual
426 configuration which is required for proper retries when a remote router
427 handles a subset of addresses for a domain.
429 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
430 link count into consideration.
432 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
433 caused the extension of big_buffer, the following lines were ignored.
435 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
436 accordance with RFC 2308. Previously there was no expiry, so a longlived
437 receive process (eg. due to ACL delays) versus a short SOA value could
440 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
442 JH/39 Promote DMARC support to mainline.
444 JH/40 Bug 2452: Add a References: header to DSNs.
446 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
447 parameters. The relevant library call is documented as "Deprecated: This
448 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
449 3.6.0, DH parameters are negotiated following RFC7919."
451 HS/06 Change the default of dnssec_request_domains to "*"
453 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
454 carried on and emitted a BDAT command, even when PIPELINING was not
457 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
458 buffer was used for the filename, resulting in a trap when tainted
459 arguments (eg. $domain) were used.
461 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
462 recommended to avoid a possible server-load attack. The feature can be
463 re-enabled via the openssl_options main cofiguration option.
465 JH/45 local_scan API: documented the current smtp_printf() call. This changed
466 for version 4.90 - adding a "more data" boolean to the arguments.
467 Bumped the ABI version number also, this having been missed previously;
468 release versions 4.90 to 4.92.3 inclusive were effectively broken in
469 respect of usage of smtp_printf() by either local_scan code or libraries
470 accessed via the ${dlfunc } expansion item. Both will need coding
471 adjustment for any calls to smtp_printf() to match the new function
472 signature; a FALSE value for the new argument is always safe.
474 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
475 the file-offset (which the Linux syscall does, and exim expects); this
476 resulted in an indefinite loop.
478 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
479 to do ARC verification. The Authentication-Results: header line added
480 by the configuration then had no ARC item.
486 JH/01 Remove code calling the customisable local_scan function, unless a new
487 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
489 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
490 non-signal-safe functions being used.
492 JH/03 Bug 2269: When presented with a received message having a stupidly large
493 number of DKIM-Signature headers, disable DKIM verification to avoid
494 a resource-consumption attack. The limit is set at twenty.
496 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
497 report of oldest_pass in ${authres } in consequence, and separate out
498 some descriptions of reasons for verification fail.
500 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
501 files in the spool were present and unlocked. A queue-runner could spot
502 them, resulting in a duplicate delivery. Fix that by doing the unlock
503 after the unlink. Investigation by Tim Stewart. Take the opportunity to
504 add more error-checking on spoolfile handling while that code is being
507 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
508 No known attacks, no CVE, this is defensive hardening.
510 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
511 a queue-runner could start a delivery while other operations were ongoing.
512 Cutthrough delivery was a common victim, resulting in duplicate delivery.
513 Found and investigated by Tim Stewart. Fix by using the open message data
514 file handle rather than opening another, and not locally closing it (which
515 releases a lock) for that case, while creating the temporary .eml format
516 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
518 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
519 $sender_verify_failure/$recipient_verify_failure to "random".
521 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
524 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
525 Previously this would segfault.
527 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
530 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
531 like zero, since the resolver should be doing this for us, But we need one
532 as a CNAME but no MX presence gets the CNAME returned; we need to check
533 that doesn't point to an MX to declare it "no MX returned" rather than
534 "error, loop". A new main option is added so the older capability of
535 following some limited number of chain links is maintained.
537 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
539 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
540 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
541 now-deprecated earlier definitions used only specified the range up to TLS
542 1.2 (in the older-version library docs).
544 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
546 JH/15 Rework TLS client-side context management. Stop using a global, and
547 explicitly pass a context around. This enables future use of TLS for
548 connections to service-daemons (eg. malware scanning) while a client smtp
549 connection is using TLS; with cutthrough connections this is quite likely.
551 JH/16 Fix ARC verification to do AS checks in reverse order.
553 JH/17 Support a "tls" option on the ${readsocket } expansion item.
555 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
556 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
557 Previously the "utf8" would be re-prepended for every additional message.
559 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
560 Previously thery were accepted, resulting in issues when attempting to
561 forward messages to a non-supporting MTA.
563 PP/02 Let -n work with printing macros too, not just options.
565 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
566 one parent address was copied, and bogus data was used at delivery-logging
567 time. Either a crash (after delivery) or bogus log data could result.
568 Discovery and analysis by Tim Stewart.
570 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
571 Previously if the string ended mid-character, we did not insert the
572 promised '?' replacement.
574 PP/04 Documentation: current string operators work on bytes, not codepoints.
576 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
577 should pack well giving a smaller memory footprint so better caching and
578 therefore performance. Group the declarations where this can't be done so
579 that the byte-sized flag variables are not interspersed among pointer
580 variables, giving a better chance of good packing by the compiler.
582 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
583 non-null, to avoid issues with sites running BATV. Previously reports were
584 sent with an empty envelope sender so looked like bounces.
586 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
587 The ignore_error flag wasn't being returned from the filter subprocess so
588 was not set for later routers. Investigation and fix by Matthias Kurz.
590 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
591 and a msg:complete for the whole, when a message is manually removed using
592 -Mrm. Developement by Matthias Kurz, hacked on by JH.
594 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
595 a "Gnu special" function, asprintf() in the DB utility binary builds; I
596 hope that is portable enough.
598 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
599 requiring a known-CA anchor certificate; make it now rely entirely on the
600 TLSA as an anchor. Checking the name on the leaf cert against the name
601 on the A-record for the host is still done for TA (but not for EE mode).
603 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
604 included in delivery lines for non-proxied connections, when compiled with
605 SUPPORT_SOCKS and running with proxy logging enabled.
607 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
608 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
609 move the existing event to fire before the normal logging of message
610 failure so that custom logging is bracketed by normal logging.
612 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
613 msg:fail:internal event. Developement by Matthias Kurz.
615 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
616 far too small for todays use of crypto signatures stored there. Go all
617 the way to the max DNS message size of 64kB, even though this might be
618 overmuch for IOT constrained device use.
620 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
621 copy a string over itself. The library routine is documented as not
622 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
624 JH/32 For main options check_spool_space and check_inode_space, where the
625 platform supports 64b integers, support more than the previous 2^31 kB
626 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
627 the previous G, M, k.
629 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
630 $authenticated_fail_id variable on authentication failure. Previously
633 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
634 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
635 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
636 GNUTLS_SEC_PARAM_MEDIUM.
638 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
639 side. Previously we would continue as if no SNI had been received.
641 JH/36 Harden the handling of string-lists. When a list consisted of a sole
642 "<" character, which should be a list-separator specification, we walked
643 off past the nul-terimation.
645 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
646 causes) even when the retry time is not yet met. Previously they were
647 not, meaning that when (say) an account was over-quota and temp-rejecting,
648 and multiple senders' messages were queued, only one sender would get
649 notified on each configured delay_warning cycle.
651 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
653 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
654 cipher-suites, an error can be left on the stack even for a succeeding
655 accept; this results in impossible error messages when a later operation
658 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
659 return error codes indicating retry. Under TLS1.3 this becomes required.
661 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
662 it only wrote the new authenticators, resulting in a lack of tracking of
663 peer changes of ESMTP extensions until the next cache flush.
665 JH/41 Fix the loop reading a message header line to check for integer overflow,
666 and more-often against header_maxsize. Previously a crafted message could
667 induce a crash of the recive process; now the message is cleanly rejected.
669 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
670 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
676 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
677 When redis_servers is set to a list of > 1 element, and the Redis servers
678 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
679 case of MOVED into a DEFER case instead, thus moving the query onto the
680 next server in the list. For a cluster of N elements, all N servers must
681 be defined in redis_servers.
683 GF/02 Catch and remove uninitialized value warning in exiqsumm
684 Check for existence of @ARGV before looking at $ARGV[0]
686 JH/01 Replace the store_release() internal interface with store_newblock(),
687 which internalises the check required to safely use the old one, plus
688 the allocate and data copy operations duplicated in both (!) of the
689 extant use locations.
691 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
692 modifier. This matches the restriction on the commandline.
694 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
695 Previously only the last row was returned.
697 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
698 we assumed that tags in the header were well-formed, and parsed the
699 element content after inspecting only the first char of the tag.
700 Assumptions at that stage could crash the receive process on malformed
703 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
704 While running the DKIM ACL we operate on the Permanent memory pool so that
705 variables created with "set" persist to the DATA ACL. Also (at any time)
706 DNS lookups that fail create cache records using the Permanent pool. But
707 expansions release any allocations made on the current pool - so a dnsdb
708 lookup expansion done in the DKIM ACL releases the memory used for the
709 DNS negative-cache, and bad things result. Solution is to switch to the
710 Main pool for expansions.
711 While we're in that code, add checks on the DNS cache during store_reset,
712 active in the testsuite.
713 Problem spotted, and debugging aided, by Wolfgang Breyha.
715 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
716 When none of the hosts presented to a transport match an already-open
717 connection, close it and proceed with the list. Previously we would
718 queue the message. Spotted by Lena with Yahoo, probably involving
721 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
722 Previously a spurious "250 OK id=" response was appended to the proper
725 JH/08 The "support for" informational output now, which built with Content
726 Scanning support, has a line for the malware scanner interfaces compiled
727 in. Interface can be individually included or not at build time.
729 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
730 by the template makefile "src/EDITME". The "STREAM" support for an older
731 ClamAV interface method is removed.
733 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
734 rows affected is given instead).
736 JH/11 The runtime Berkeley DB library version is now additionally output by
737 "exim -d -bV". Previously only the compile-time version was shown.
739 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
740 SMTP connection. Previously, when one had more receipients than the
741 first, an abortive onward connection was made. Move to full support for
742 multiple onward connections in sequence, handling cutthrough connection
743 for all multi-message initiating connections.
745 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
746 routers. Previously, a multi-recipient message would fail to match the
747 onward-connection opened for the first recipient, and cause its closure.
749 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
750 a timeout on read on a GnuTLS initiating connection, resulting in the
751 initiating connection being dropped. This mattered most when the callout
752 was marked defer_ok. Fix to keep the two timeout-detection methods
755 JH/15 Relax results from ACL control request to enable cutthrough, in
756 unsupported situations, from error to silently (except under debug)
757 ignoring. This covers use with PRDR, frozen messages, queue-only and
760 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
762 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
763 metadata, resulting in a crash in free().
765 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
766 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
767 Broken also in d185889f4, with init system revamp.
769 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
770 Previously we abruptly closed the connection after reading a malware-
771 found indication; now we go on to read the "scan ok" response line,
774 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
775 ACL. Previously, a crash would result.
777 JH/19 Speed up macro lookups during configuration file read, by skipping non-
778 macro text after a replacement (previously it was only once per line) and
779 by skipping builtin macros when searching for an uppercase lead character.
781 JH/20 DANE support moved from Experimental to mainline. The Makefile control
782 for the build is renamed.
784 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
785 was allocated for every new TLS startup, meaning one per message. Fix
786 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
788 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
789 reported the original. Fix to report (as far as possible) the ACL
790 result replacing the original.
792 JH/23 Fix memory leak during multi-message connections using STARTTLS under
793 OpenSSL. Certificate information is loaded for every new TLS startup,
794 and the resources needed to be freed.
796 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
798 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
801 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
802 DATA response info to the (existing) per-recipient response info for
803 the "C=" log element. It can have useful tracking info from the
804 destination system. Patch from Simon Arlott.
806 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
807 length value. Previously this would segfault.
809 HS/02 Support Avast multiline protoocol, this allows passing flags to
810 newer versions of the scanner.
812 JH/28 Ensure that variables possibly set during message acceptance are marked
813 dead before release of memory in the daemon loop. This stops complaints
814 about them when the debug_store option is enabled. Discovered specifically
815 for sender_rate_period, but applies to a whole set of variables.
816 Do the same for the queue-runner and queue-list loops, for variables set
817 from spool message files. Do the same for the SMTP per-message loop, for
818 certain variables indirectly set in ACL operations.
820 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
821 as a multi-recipient message from a mailinglist manager). The coding had
822 an arbitrary cutoff number of characters while checking for more input;
823 enforced by writing a NUL into the buffer. This corrupted long / fast
824 input. The problem was exposed more widely when more pipelineing of SMTP
825 responses was introduced, and one Exim system was feeding another.
826 The symptom is log complaints of SMTP syntax error (NUL chars) on the
827 receiving system, and refused recipients seen by the sending system
828 (propating to people being dropped from mailing lists).
829 Discovered and pinpointed by David Carter.
831 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
832 replaced by the ${authresults } expansion.
834 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
836 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
837 allows proper process termination in container environments.
839 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
840 Previously the "final dot" had a newline after it; ensure it is CR,LF.
842 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
843 and "err_perm", deprecated since 4.83 when the RFC-defined words
844 "temperror" and "permerror" were introduced.
846 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
847 transport-filters or DKIM-signing. The restriction was lost in the
848 consolidation of verify-callout and delivery SMTP handling.
849 Extend the restriction to also cover ARC-signing.
851 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
852 in defer=pass mode supply a 450 to the initiator. Previously the message
855 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
856 tls_require_ciphers is used as before.
858 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
859 "pass_unscanned". Only tmpfails from the scanner are written to
860 the paniclog, as they may require admin intervention (permission
861 denied, license issues). Other scanner errors (like decompression
862 bombs) do not cause a paniclog entry.
864 JH/36 Fix reinitialisation of DKIM logging variable between messages.
865 Previously it was possible to log spurious information in receive log
868 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
869 triggered odd behaviour from Outlook Express clients.
871 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
874 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
875 since the IETF WG has not yet settled on that versus the original
876 "bare" representation.
878 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
879 Previously the millisecond value corrupted the output.
880 Fix also for syslog_pid=no and log_selector +pid, for which the pid
881 corrupted the output.
887 JH/01 Rework error string handling in TLS interface so that the caller in
888 more cases is responsible for logging. This permits library-sourced
889 string to be attached to addresses during delivery, and collapses
890 pairs of long lines into single ones.
892 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
893 during configuration. Wildcards are allowed and expanded.
895 JH/02 Rework error string handling in DKIM to pass more info back to callers.
896 This permits better logging.
898 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
899 do not close it down and have the child transport start it up again on
900 the passed-on TCP connection. Instead, proxy the child (and any
901 subsequent ones) for TLS via a unix-domain socket channel. Logging is
902 affected: the continued delivery log lines do not have any DNSSEC, TLS
903 Certificate or OCSP information. TLS cipher information is still logged.
905 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
906 identical IP addresses on different listening ports. Will also affect
909 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
910 add noisy ifdef guards to special-case this sillyness.
911 Patch from Bernd Kuhls.
913 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
914 than 255 are no longer allowed.
916 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
917 Disable the session-cache too, which might reduce our load. Since we
918 currrectly use a new context for every connection, both as server and
919 client, there is no benefit for these.
920 GnuTLS appears to not support tickets server-side by default (we don't
921 call gnutls_session_ticket_enable_server()) but client side is enabled
922 by default on recent versions (3.1.3 +) unless the PFS priority string
925 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
926 <https://reproducible-builds.org/specs/source-date-epoch/>.
928 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
929 the check for any unsuccessful recipients did not notice the limit, and
930 erroneously found still-pending ones.
932 JH/08 Pipeline CHUNKING command and data together, on kernels that support
933 MSG_MORE. Only in-clear (not on TLS connections).
935 JH/09 Avoid using a temporary file during transport using dkim. Unless a
936 transport-filter is involved we can buffer the headers in memory for
937 creating the signature, and read the spool data file once for the
938 signature and again for transmission.
940 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
941 4.77 as the kernel support then wasn't solid, having issues in 64bit
942 mode. Now, it's been long enough. Add support for FreeBSD also.
944 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
945 case where the routing stage had gathered several addresses to send to
946 a host before calling the transport for the first, we previously failed
947 to close down TLS in the old transport process before passing the TCP
948 connection to the new process. The new one sent a STARTTLS command
949 which naturally failed, giving a failed delivery and bloating the retry
950 database. Investigation and fix prototype from Wolfgang Breyha.
952 JH/12 Fix check on SMTP command input synchronisation. Previously there were
953 false-negatives in the check that the sender had not preempted a response
954 or prompt from Exim (running as a server), due to that code's lack of
955 awareness of the SMTP input buffering.
957 PP/04 Add commandline_checks_require_admin option.
958 Exim drops privileges sanely, various checks such as -be aren't a
959 security problem, as long as you trust local users with access to their
960 own account. When invoked by services which pass untrusted data to
961 Exim, this might be an issue. Set this option in main configuration
962 AND make fixes to the calling application, such as using `--` to stop
965 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
966 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
967 responses to those, into a single TLS record each way (this usually means
968 a single packet). As a side issue, smtp_enforce_sync now works on TLS
971 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
972 affects you only if you're dancing at the edge of the param size limits.
973 If you are, and this message makes sense to you, then: raise the
974 configured limit or use OpenSSL 1.1. Nothing we can do for older
977 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
978 cmdline element to get the documented default one. Previously it was
981 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
982 are unsuable for non-message-specific reasons - eg. connection timeout,
983 banner-time rejection.
985 JH/16 Fix logging of delivery remote port, when specified by router, under
988 PP/06 Repair manualroute's ability to take options in any order, even if one
989 is the name of a transport.
992 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
994 JH/17 Change the list-building routines interface to use the expanding-string
995 triplet model, for better allocation and copying behaviour.
997 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
998 Previously it was constructed the first time a possibly-matching string
999 was met in the configuration file input during startup; now it is done
1002 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1003 compatible one, to avoid the (poorly documented) possibility of a config
1004 file in the working directory redirecting the DB files, possibly correpting
1005 some existing file. CVE-2017-10140 assigned for BDB.
1007 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1008 cache-hot. Previously, although the result was properly cached, the
1009 initial verify call returned a defer.
1011 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1012 the main verify for receipient in uncached-mode.
1014 JH/22 Retire historical build files to an "unsupported" subdir. These are
1015 defined as "ones for which we have no current evidence of testing".
1017 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1018 if present. Previously it was ignored.
1020 JH/24 Start using specified-initialisers in C structure init coding. This is
1021 a C99 feature (it's 2017, so now considered safe).
1023 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1024 if was a fixed-sized field and bitmask ops via macros; it is now more
1027 PP/07 GitHub PR 56: Apply MariaDB build fix.
1028 Patch provided by Jaroslav Škarvada.
1030 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1031 during Coverity cleanups [4.87 JH/47]
1032 Diagnosis and fix provided by Michael Fischer v. Mollard.
1034 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1035 the right size to place the terminating semicolon on its own folded
1036 line, the header hash was calculated to an incorrect value thanks to
1037 the (relaxed) space the fold became.
1039 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1040 and confused the parent.
1042 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1043 which could crash as a result. This could lead to undeliverable messages.
1045 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1048 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1049 matters on fast-turnover and PID-randomising systems, which were getting
1050 out-of-order delivery.
1052 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1053 a possibly-overlapping copy. The symptom was that "Remote host closed
1054 connection in response to HELO" was logged instead of the actual 4xx
1057 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1058 Previously only that bufferd was discarded, resulting in SYMTP command
1061 JH/32 DKIM: when a message has multiple signatures matching an identity given
1062 in dkim_verify_signers, run the dkim acl once for each. Previously only
1063 one run was done. Bug 2189.
1065 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1066 "panic the current process" to "deliberately defer". The panic log is
1067 still written with the problem list name; the mail and reject logs now
1068 get a temp-reject line for the message that was being handled, saying
1069 something like "domains check lookup or other defer". The SMTP 451
1070 message is still "Temporary local problem".
1072 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1073 A crafted sequence of BDAT commands could result in in-use memory beeing
1074 freed. CVE-2017-16943.
1076 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1077 from SMTP input. Previously it was always done; now only done for DATA
1078 and not BDAT commands. CVE-2017-16944.
1080 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1081 to the message (such as an overlong header line). Previously this was
1082 not done and we did not exit BDAT mode. Followon from the previous item
1083 though a different problem.
1089 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1090 than -2003 did; needs libidn2 in addition to libidn.
1092 JH/02 The path option on a pipe transport is now expanded before use.
1094 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1095 Patch provided by "Björn", documentation fix added too.
1097 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1098 missing a wire-to-host endian conversion.
1100 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1101 close after a BDAT command line could be taken as a following command,
1102 giving a synch failure. Fix by only checking for synch immediately
1103 before acknowledging the chunk.
1105 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1106 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1107 macro. Patches provided by Josh Soref.
1109 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1110 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1111 by IANA as a service extension. However, John Klensin suggests that we
1114 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1115 the dkim code may be unix-mode line endings rather than smtp wire-format
1116 CRLF, so prepend a CR to any bare LF.
1118 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1119 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1121 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1122 the first were themselves being wrongly included in the feed into dkim
1123 processing; with most chunk sizes in use this resulted in an incorrect
1124 body hash calculated value.
1126 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1127 DKIM signature block, for verification. Although advised against by
1128 standards it is specifically not ruled illegal.
1130 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1132 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1133 missing a body hash (the bh= tag).
1135 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1136 It seems that HAProxy sends the Proxy Protocol information in clear and
1137 only then does a TLS startup, so do the same.
1139 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1140 TCP connections (such as for Spamd) unless the daemon successfully set
1141 Fast Open mode on its listening sockets. This fixes breakage seen on
1142 too-old kernels or those not configured for Fast Open, at the cost of
1143 requiring both directions being enabled for TFO, and TFO never being used
1144 by non-daemon-related Exim processes.
1146 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1147 endings, at least on the first header line. Try to canonify any that get
1148 past that check, despite the cost.
1150 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1151 now limited to an arbitrary five deep, while parsing addresses with the
1152 strip_excess_angle_brackets option enabled.
1154 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1155 instead leave the unprompted TLS handshake in socket buffer for the
1156 TLS library to consume.
1158 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1160 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1162 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1163 region in one operation, for speed, and this leaves assigned pointers
1164 dangling. Add checks run only under the testsuite which checks all
1165 variables at a store-reset and panics on a dangling pointer; add code
1166 explicitly nulling out all the variables discovered. Fixes one known
1167 bug: a transport crash, where a dangling pointer for $sending_ip_address
1168 originally assigned in a verify callout, is re-used.
1170 PP/06 Drop '.' from @INC in various Perl scripts.
1172 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1174 PP/08 Reduce a number of compilation warnings under clang; building with
1175 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1176 should be warning-free.
1178 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1180 HS/01 Fix portability problems introduced by PP/08 for platforms where
1181 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1183 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1184 chunk. This allows us to accept broken chunked messages. We need a more
1185 general solution here.
1187 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1188 already-broken messages in the queue.
1190 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1192 JH/19 Fix reference counting bug in routing-generated-address tracking.
1198 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1199 supports it and a size is available (ie. the sending peer gave us one).
1201 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1202 years of being deprecated). The replacements are the ACLs
1203 acl_smtp_mime and acl_not_smtp_mime.
1205 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1206 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1207 or even an in-clear connection were permitted. Now, if the host lookup
1208 was dnssec and dane was requested then the host is only used if the
1209 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1210 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1211 if one fails this test.
1212 This means that a poorly-configured remote DNS will make it incommunicado;
1213 but it protects against a DNS-interception attack on it.
1215 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1216 non-noisy when a race steals the message being considered.
1218 JH/05 If main configuration option tls_certificate is unset, generate a
1219 self-signed certificate for inbound TLS connections.
1221 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1222 in rewrites and routers.
1224 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1225 and logged a warning sing 4.83; now they are a configuration file error.
1227 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1228 (lacking @domain). Apply the same qualification processing as RCPT.
1230 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1232 JH/10 Support ${sha256:} applied to a string (as well as the previous
1235 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1236 a cutthrough deliver is pending, as we always want to make a connection.
1237 This also avoids re-routing the message when later placing the cutthrough
1238 connection after a verify cache hit.
1239 Do not update it with the verify result either.
1241 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1242 when routing results in more than one destination address.
1244 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1245 signing (which inhibits the cutthrough capability). Previously only
1246 the presence of an option was tested; now an expansion evaluating as
1247 empty is permissible (obviously it should depend only on data available
1248 when the cutthrough connection is made).
1250 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1251 the relevant preceding SMTP command did not note the pipelining mode.
1253 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1254 Previously they were not counted.
1256 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1257 as one having no matching records. Previously we deferred the message
1258 that needed the lookup.
1260 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1261 distinguished as "(=".
1263 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1264 for missing MX records. Previously it only worked for missing A records.
1266 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1268 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1269 after the data-go-ahead and data-ack. Patch from Jason Betts.
1271 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1272 even for a "none" policy. Patch from Tony Meyer.
1274 JH/22 Fix continued use of a connection for further deliveries. If a port was
1275 specified by a router, it must also match for the delivery to be
1278 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1279 When one of the recipients of a message was unsuitable for the connection
1280 (has no matching addresses), we lost track of needing to mark it
1281 deferred. As a result mail would be lost.
1283 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1285 JH/25 Decoding ACL controls is now done using a binary search; the source code
1286 takes up less space and should be simpler to maintain. Merge the ACL
1287 condition decode tables also, with similar effect.
1289 JH/26 Fix problem with one_time used on a redirect router which returned the
1290 parent address unchanged. A retry would see the parent address marked as
1291 delivered, so not attempt the (identical) child. As a result mail would
1294 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1295 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1296 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1299 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1300 Main config options check_{log,spool}_{inodes,space} are now
1301 100 inodes, 10MB unless set otherwise in the configuration.
1303 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1304 Previously it only applied to the main-section connection policy
1307 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1309 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1310 by me. Added RFC7919 DH primes as an alternative.
1312 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1313 are not in the system include path.
1315 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1316 GnuTLS, when a session startup failed (eg because the client disconnected)
1317 Exim did stdio operations after fclose. This was exposed by a recent
1318 change which nulled out the file handle after the fclose.
1320 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1321 signed directly by the cert-signing cert, rather than an intermediate
1322 OCSP-signing cert. This is the model used by LetsEncrypt.
1324 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1326 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1327 an incoming connection.
1329 HS/02 Bug 1802: Do not half-close the connection after sending a request
1332 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1333 fallback to "prime256v1".
1335 JH/34 SECURITY: Use proper copy of DATA command in error message.
1336 Could leak key material. Remotely exploitable. CVE-2016-9963.
1342 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1343 and 3.4.4 - once the server is enabled to respond to an OCSP request
1344 it does even when not requested, resulting in a stapling non-aware
1345 client dropping the TLS connection.
1347 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1348 support variable-length bit vectors. No functional change.
1350 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1351 The I= interface field on outgoing lines is now after the H= remote
1352 host field, same as incoming lines. There is a separate
1353 outgoing_interface log selector which allows you to disable the
1356 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1357 If not running log_selector +smtp_connection the mainlog would be held
1358 open indefinitely after a "too many connections" event, including to a
1359 deleted file after a log rotate. Leave the per net connection logging
1360 leaving it open for efficiency as that will be quickly detected by the
1361 check on the next write.
1363 HS/01 Bug 1671: Fix post transport crash.
1364 Processing the wait-<transport> messages could crash the delivery
1365 process if the message IDs didn't exist for some reason. When
1366 using 'split_spool_directory=yes' the construction of the spool
1367 file name failed already, exposing the same netto behaviour.
1369 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1370 mime_regex ACL conditions.
1372 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1373 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1374 to HELO, local diagnostic string.
1376 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1377 log line to debug. Even when configured with a tls authenticator many
1378 client connections are expected to not authenticate in this way, so
1379 an authenticate fail is not an error.
1381 HS/02 Add the Exim version string to the process info. This way exiwhat
1382 gives some more detail about the running daemon.
1384 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1385 matter for fast-change records such as DNSBLs.
1387 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1388 retry record, even if constant. There may be multiple transports with
1389 different interface settings and the retry behaviour needs to be kept
1392 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1394 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1396 JH/10 Bug 840: fix log_defer_output option of pipe transport
1398 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1399 hosts_randomize. This matters a lot when combined with mua_wrapper.
1401 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1402 ${quote_pgsql:<string>} operator.
1404 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1406 JH/14 Change header file name for freeradius-client. Relevant if compiling
1407 with Radius support; from the Gentoo tree and checked under Fedora.
1409 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1411 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1412 option transport_filter, meaning no filtering.
1414 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1416 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1417 defaults to "*" (all hosts). The variable is now available when not built
1418 with TLS, default unset, mainly to enable keeping the testsuite sane.
1419 If a server certificate is not supplied (via tls_certificate) an error is
1420 logged, and clients will find TLS connections fail on startup. Presumably
1421 they will retry in-clear.
1422 Packagers of Exim are strongly encouraged to create a server certificate
1423 at installation time.
1425 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1426 with the $config_file variable.
1428 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1429 in transport context, after the attempt, and per-recipient. The latter type
1430 is per host attempted. The event data is the error message, and the errno
1431 information encodes the lookup type (A vs. MX) used for the (first) host,
1432 and the trailing two digits of the smtp 4xx response.
1434 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1435 to write to mainlog (or rejectlog, paniclog) in the window between file
1436 creation and permissions/ownership being changed. Particularly affects
1437 installations where exicyclog is run as root, rather than exim user;
1438 result is that the running daemon panics and dies.
1440 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1442 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1443 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1444 "pri" and "weight". Note that the previous implicit priority given by the
1445 list order is no longer honoured.
1447 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1448 for DKIM processing.
1450 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1451 by defining SUPPORT_SOCKS.
1453 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1454 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1455 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1456 variables are renamed to proxy_{local,external}_{address,port}.
1458 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1459 for a build by defining SUPPORT_I18N
1461 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1462 of the query string, and make ${quote_redis:} do that quoting.
1464 JH/29 Move Events support from Experimental to mainline, enabled by default
1465 and removable for a build by defining DISABLE_EVENT.
1467 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1469 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1470 cached by the daemon.
1472 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1473 by defining LOOKUP_REDIS. The libhiredis library is required.
1475 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1476 keys are given for lookup.
1478 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1479 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1480 only supported when built with TLS support. The PolarSSL SHA routines
1481 are still used when the TLS library is too old for convenient support.
1483 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1484 openssl_options), for security. OpenSSL forces this from version 1.1.0
1485 server-side so match that on older versions.
1487 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1488 allocation for $value could be released as the expansion processing
1489 concluded, but leaving the global pointer active for it.
1491 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1492 and to use the domains and local_parts ACL conditions.
1494 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1495 incorrectly not doubled on cutthrough transmission, hence seen as a
1496 body-termination at the receiving system - resulting in truncated mails.
1497 Commonly the sender saw a TCP-level error, and retransmitted the message
1498 via the normal store-and-forward channel. This could result in duplicates
1499 received - but deduplicating mailstores were liable to retain only the
1500 initial truncated version.
1502 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1504 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1506 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1507 we're in there, support oversigning also; bug 1309.
1509 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1511 HS/04 Add support for keep_environment and add_environment options.
1513 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1514 either intentional arithmetic overflow during PRNG, or testing config-
1517 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1518 delivery resulted in actual delivery. Cancel cutthrough before DATA
1521 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1522 rejects a recipient: pass the reject to the originator.
1524 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1525 Many were false-positives and ignorable, but it's worth fixing the
1528 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1529 for the new environment-manipulation done at startup. Move the routines
1530 from being local to tls.c to being global via the os.c file.
1532 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1533 an extract embedded as result-arg for a map, the first arg for extract
1534 is unavailable so we cannot tell if this is a numbered or keyed
1535 extraction. Accept either.
1541 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1544 JH/02 The smtp transport option "multi_domain" is now expanded.
1546 JH/03 The smtp transport now requests PRDR by default, if the server offers
1549 JH/04 Certificate name checking on server certificates, when exim is a client,
1550 is now done by default. The transport option tls_verify_cert_hostnames
1551 can be used to disable this per-host. The build option
1552 EXPERIMENTAL_CERTNAMES is withdrawn.
1554 JH/05 The value of the tls_verify_certificates smtp transport and main options
1555 default to the word "system" to access the system default CA bundle.
1556 For GnuTLS, only version 3.0.20 or later.
1558 JH/06 Verification of the server certificate for a TLS connection is now tried
1559 (but not required) by default. The verification status is now logged by
1560 default, for both outbound TLS and client-certificate supplying inbound
1563 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1566 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1567 Status Notification (bounce) messages are now MIME format per RFC 3464.
1568 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1569 under the control of the dsn_advertise_hosts option, and routers may
1570 have a dsn_lasthop option.
1572 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1573 default, modifiable by a malware= option. The list separator for
1574 the options can now be changed in the usual way. Bug 68.
1576 JH/10 The smtp_receive_timeout main option is now expanded before use.
1578 JH/11 The incoming_interface log option now also enables logging of the
1579 local interface on delivery outgoing connections.
1581 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1582 if the interface and destination host and port all match.
1584 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1587 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1588 Patch from Andrew Lewis.
1590 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1591 now supports optional time-restrictions, weighting, and priority
1592 modifiers per server. Patch originally by <rommer@active.by>.
1594 JH/16 The spamd_address main option now supports a mixed list of local
1595 and remote servers. Remote servers can be IPv6 addresses, and
1596 specify a port-range.
1598 JH/17 Bug 68: The spamd_address main option now supports an optional
1599 timeout value per server.
1601 JH/18 Bug 1581: Router and transport options headers_add/remove can
1602 now have the list separator specified.
1604 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1607 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1610 JH/21 Support for the A6 type of dns record is withdrawn.
1612 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1613 rather than the verbs used.
1615 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1616 from 255 to 1024 chars.
1618 JH/24 Verification callouts now attempt to use TLS by default.
1620 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1621 are generic router options now. The defaults didn't change.
1623 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1624 Original patch from Alexander Shikoff, worked over by JH.
1626 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1627 files if ZCAT_COMMAND is not executable.
1629 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1631 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1633 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1634 Normally benign, it bites when the pair was led to by a CNAME;
1635 modern usage is to not canonicalize the domain to a CNAME target
1636 (and we were inconsistent anyway for A-only vs AAAA+A).
1638 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1640 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1641 when evaluating $sender_host_dnssec.
1643 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1644 $sender_helo_dnssec variable.
1646 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1648 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1650 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1652 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1653 documented as working, but never had. Support all but $spam_report.
1655 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1656 added for tls authenticator.
1658 HS/03 Add perl_taintmode main config option
1664 TL/01 When running the test suite, the README says that variables such as
1665 no_msglog_check are global and can be placed anywhere in a specific
1666 test's script, however it was observed that placement needed to be near
1667 the beginning for it to behave that way. Changed the runtest perl
1668 script to read through the entire script once to detect and set these
1669 variables, reset to the beginning of the script, and then run through
1670 the script parsing/test process like normal.
1672 TL/02 The BSD's have an arc4random API. One of the functions to induce
1673 adding randomness was arc4random_stir(), but it has been removed in
1674 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1675 function when detected.
1677 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1678 cause callback expansion.
1680 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1681 syntax errors in an expansion can be treated as a string instead of
1682 logging or causing an error, due to the internal use of bool_lax
1683 instead of bool when processing it.
1685 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1686 server certificates when making smtp deliveries.
1688 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1690 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1692 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1694 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1695 Merged patch from Sebastian Wiedenroth.
1697 JH/05 Fix results-pipe from transport process. Several recipients, combined
1698 with certificate use, exposed issues where response data items split
1699 over buffer boundaries were not parsed properly. This eventually
1700 resulted in duplicates being sent. This issue only became common enough
1701 to notice due to the introduction of connection certificate information,
1702 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1704 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1705 size buffer was used, resulting in syntax errors when an expansion
1708 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1709 version 3.3.6 or later.
1711 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1712 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1713 both become "event_action", the variables become $event_name, $event_data
1714 and $event_defer_errno. There is a new variable $verify_mode, usable in
1715 routers, transports and related events. The tls:cert event is now also
1716 raised for inbound connections, if the main configuration event_action
1719 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1720 early OCSP support, but no stapling (appears to be less than 1.0.0).
1722 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1723 server certificate names available under the smtp transport option
1724 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1727 JH/10 Time-related extraction expansions from certificates now use the main
1728 option "timezone" setting for output formatting, and are consistent
1729 between OpenSSL and GnuTLS compilations. Bug 1541.
1731 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1732 encoded parameter in the incoming message. Bug 1558.
1734 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1735 include certificate info, eximon was claiming there were spoolfile
1738 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1740 JH/14 Log delivery-related information more consistently, using the sequence
1741 "H=<name> [<ip>]" wherever possible.
1743 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1744 are problematic for Debian distribution, omit them from the release
1747 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1749 JH/16 Fix string representation of time values on 64bit time_t architectures.
1752 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1753 output list separator was used.
1758 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1759 checkers that were complaining about end of non-void function with no
1762 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1763 This was a regression introduced in 4.83 by another bugfix.
1765 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1767 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1768 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1774 TF/01 Correctly close the server side of TLS when forking for delivery.
1776 When a message was received over SMTP with TLS, Exim failed to clear up
1777 the incoming connection properly after forking off the child process to
1778 deliver the message. In some situations the subsequent outgoing
1779 delivery connection happened to have the same fd number as the incoming
1780 connection previously had. Exim would try to use TLS and fail, logging
1781 a "Bad file descriptor" error.
1783 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1784 utilities have not been installed.
1786 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1787 temporary space as the ACL may create new global variables.
1789 TL/01 LDAP support uses per connection or global context settings, depending
1790 upon the detected version of the libraries at build time.
1792 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1793 to extract and use the src ip:port in logging and expansions as if it
1794 were a direct connection from the outside internet. PPv2 support was
1795 updated based on HAProxy spec change in May 2014.
1797 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1799 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1800 Properly escape header and check for NULL return.
1802 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1805 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1807 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1808 characters in header names, implemented as a verify condition.
1809 Contributed by Michael Fischer v. Mollard.
1811 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1812 results permerror and temperror. Previous values are deprecated but
1813 still accepted. In a future release, err_perm and err_temp will be
1814 completely removed, which will be a backward incompatibility if the
1815 ACL tests for either of these two old results. Patch contributed by
1816 user bes-internal on the mailing list.
1818 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1820 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1821 selectors, in both main and reject logs.
1823 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1826 JH/07 Add malware type "sock" for talking to simple daemon.
1828 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1830 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1831 routers/transports under cutthrough routing.
1833 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1834 numbers. Touch up "bool" conditional to keep the same definition.
1836 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1838 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1840 JH/12 Expand items in router/transport headers_add or headers_remove lists
1841 individually rather than the list as a whole. Bug 1452.
1843 Required for reasonable handling of multiple headers_ options when
1844 they may be empty; requires that headers_remove items with embedded
1845 colons must have them doubled (or the list-separator changed).
1847 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1848 view the policy declared in the DMARC record. Currently, $dmarc_status
1849 is a combined value of both the record presence and the result of the
1852 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1854 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1855 dnslookup router and the smtp transport (applying to the forward
1858 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1859 of ldap servers used for a specific lookup. Patch provided by Heiko
1862 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1863 New variable $lookup_dnssec_authenticated for observability.
1865 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1866 Patch submitted by Lars Timman.
1868 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1870 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1871 Requires trusted mode and valid format message id, aborts otherwise.
1872 Patch contributed by Heiko Schlichting.
1874 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1875 certextract with support for various fields. Bug 1358.
1877 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1878 is requested by default, modifiable by smtp transport option
1881 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1882 operate on certificate variables to give certificate fingerprints
1883 Also new ${sha256:cert_variable}.
1885 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1887 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1888 Christian Aistleitner.
1890 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1892 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1893 file. Patch from Wolfgang Breyha.
1895 JH/25 Expand the coverage of the delivery $host and $host_address to
1896 client authenticators run in verify callout. Bug 1476.
1898 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1899 align with daemon_smtp_ports. Bug 72.
1901 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1902 support and error reporting did not work properly.
1904 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1905 and is readable. Patch from Andrew Colin Kissa.
1907 TL/14 Enhance documentation of ${run expansion and how it parses the
1908 commandline after expansion, particularly in the case when an
1909 unquoted variable expansion results in an empty value.
1911 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1913 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1914 by renaming away from it. Addresses GH issue 15, reported by
1917 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1919 TL/15 SECURITY: prevent double expansion in math comparison functions
1920 (can expand unsanitized data). Not remotely exploitable.
1927 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1929 PP/02 Make -n do something, by making it not do something.
1930 When combined with -bP, the name of an option is not output.
1932 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1935 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1936 $sender_host_name and config options to manage this, and basic check
1939 PP/05 DSCP support for outbound connections and control modifier for inbound.
1941 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1942 (Only plugin which currently uses this is kerberos4, which nobody should
1943 be using, but we should make it available and other future plugins might
1944 conceivably use it, even though it would break NAT; stuff *should* be
1945 using channel bindings instead).
1947 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1948 name; added for Sendmail compatibility; requires admin caller.
1949 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1950 just ignore it); requires trusted caller.
1951 Also parse but ignore: -Ac -Am -X<logfile>
1954 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1956 TL/02 Add +smtp_confirmation as a default logging option.
1958 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1959 Patch by Magnus Holmgren from 2007-02-20.
1961 TL/04 Bugzilla 1281 - Spec typo.
1962 Bugzilla 1283 - Spec typo.
1963 Bugzilla 1290 - Spec grammar fixes.
1965 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1967 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1969 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1970 mailing list by by Dmitry Isaikin.
1972 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1974 JH/02 Support "G" suffix to numbers in ${if comparisons.
1976 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1978 NM/01 Bugzilla 1197 - Spec typo
1979 Bugzilla 1196 - Spec examples corrections
1981 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1983 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1984 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1987 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1988 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1990 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1991 "acl {{name}{arg}...}", and optional args on acl condition
1994 JH/05 Permit multiple router/transport headers_add/remove lines.
1996 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1998 JH/07 Avoid using a waiting database for a single-message-only transport.
1999 Performance patch from Paul Fisher. Bugzilla 1262.
2001 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2004 JH/09 Add $headers_added variable, with content from use of ACL modifier
2005 add_header (but not yet added to the message). Bugzilla 199.
2007 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2008 Pulled from Bugzilla 817 by Wolfgang Breyha.
2010 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2012 (nb: this is the same fix as in Exim 4.80.1)
2014 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2017 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2020 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2022 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2023 advertise SMTP AUTH mechanism to us, instead of a generic
2024 protocol violation error. Also, make Exim more robust to bad
2025 data from the Dovecot auth socket.
2027 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2029 When a queue runner is handling a message, Exim first routes the
2030 recipient addresses, during which it prunes them based on the retry
2031 hints database. After that it attempts to deliver the message to
2032 any remaining recipients. It then updates the hints database using
2035 So if a recipient address works intermittently, it can get repeatedly
2036 deferred at routing time. The retry hints record remains fresh so the
2037 address never reaches the final cutoff time.
2039 This is a fairly common occurrence when a user is bumping up against
2040 their storage quota. Exim had some logic in its local delivery code
2041 to deal with this. However it did not apply to per-recipient defers
2042 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2044 This change adds a proper retry rule check during routing so that the
2045 final cutoff time is checked against the message's age. We only do
2046 this check if there is an address retry record and there is not a
2047 domain retry record; this implies that previous attempts to handle
2048 the address had the retry_use_local_parts option turned on. We use
2049 this as an approximation for the destination being like a local
2050 delivery, as in LMTP.
2052 I suspect this new check makes the old local delivery cutoff check
2053 redundant, but I have not verified this so I left the code in place.
2055 TF/02 Correct gecos expansion when From: is a prefix of the username.
2057 Test 0254 submits a message to Exim with the header
2061 When I ran the test suite under the user fanf2, Exim expanded
2062 the header to contain my full name, whereas it should have added
2063 a Resent-Sender: header. It erroneously treats any prefix of the
2064 username as equal to the username.
2066 This change corrects that bug.
2068 GF/01 DCC debug and logging tidyup
2069 Error conditions log to paniclog rather than rejectlog.
2070 Debug lines prefixed by "DCC: " to remove any ambiguity.
2072 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2074 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2075 Bug spotted by Jeremy Harris; was flawed since initial commit.
2076 Would have resulted in OCSP responses post-SNI triggering an Exim
2077 NULL dereference and crash.
2079 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2081 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2082 Bug detection, analysis and fix by Samuel Thibault.
2083 Bugzilla 1331, Debian bug #698092.
2085 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2087 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2088 Server implementation by Todd Lyons, client by JH.
2089 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2090 config variable "prdr_enable" controls whether the server
2091 advertises the facility. If the client requests PRDR a new
2092 acl_data_smtp_prdr ACL is called once for each recipient, after
2093 the body content is received and before the acl_smtp_data ACL.
2094 The client is controlled by both of: a hosts_try_prdr option
2095 on the smtp transport, and the server advertisement.
2096 Default client logging of deliveries and rejections involving
2097 PRDR are flagged with the string "PRDR".
2099 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2100 fclose(). Diagnosis by Todd Lyons.
2102 PP/17 Update configure.default to handle IPv6 localhost better.
2103 Patch by Alain Williams (plus minor tweaks).
2106 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2107 This is now consistent with GnuTLS, and is now documented: the
2108 previous undocumented portable approach to treating the option as
2109 unset was to force an expansion failure. That still works, and
2110 an empty string is now equivalent.
2112 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2113 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2114 not performing validation itself.
2116 PP/20 Added force_command boolean option to pipe transport.
2117 Patch from Nick Koston, of cPanel Inc.
2119 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2122 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2124 PP/21 Fix eximon continuous updating with timestamped log-files.
2125 Broken in a format-string cleanup in 4.80, missed when I repaired the
2126 other false fix of the same issue.
2127 Report and fix from Heiko Schlichting.
2130 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2131 Report from Prashanth Katuri.
2133 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2134 It's SecureTransport, so affects any MacOS clients which use the
2135 system-integrated TLS libraries, including email clients.
2137 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2138 using a MIME ACL for non-SMTP local injection.
2139 Report and assistance in diagnosis by Warren Baker.
2141 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2143 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2145 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2146 last id that failed so it may be referenced in subsequent ACL's.
2148 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2151 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2152 ldap library initialization, allowing self-signed CA's to be
2153 used. Also properly sets require_cert option later in code by
2154 using NULL (global ldap config) instead of ldap handle (per
2155 session). Bug diagnosis and testing by alxgomz.
2157 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2158 the src/util/ subdirectory.
2160 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2161 renamed to Transport Post Delivery Action by Jeremy Harris, as
2164 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2165 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2166 redis_servers = needs to be configured which will be used by the redis
2167 lookup. Patch from Warren Baker, of The Packet Hub.
2169 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2171 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2172 hostname or reverse DNS when processing a host list. Used suggestions
2173 from multiple comments on this bug.
2175 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2177 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2178 Missed a few lines, added it to make the runtest require no keyboard
2181 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2182 contains upper case chars. Make router use caseful_local_part.
2184 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2185 support when GnuTLS has been built with p11-kit.
2191 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2193 This, or similar/improved, will also be change PP/11 of 4.82.
2199 PP/01 Handle short writes when writing local log-files.
2200 In practice, only affects FreeBSD (8 onwards).
2201 Bugzilla 1053, with thanks to Dmitry Isaikin.
2203 NM/01 Bugzilla 949 - Documentation tweak
2205 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2208 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2210 PP/02 Implemented gsasl authenticator.
2212 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2214 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2215 `pkg-config foo` for cflags/libs.
2217 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2218 with rest of GSASL and with heimdal_gssapi.
2220 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2221 `pkg-config foo` for cflags/libs for the TLS implementation.
2223 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2224 properties get this fed in as external SSF. A number of robustness
2225 and debugging improvements to the cyrus_sasl authenticator.
2227 PP/08 cyrus_sasl server now expands the server_realm option.
2229 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2230 Patch by Jeremy Harris.
2232 PP/10 Added dbmjz lookup type.
2234 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2236 PP/12 MAIL args handles TAB as well as SP, for better interop with
2237 non-compliant senders.
2238 Analysis and variant patch by Todd Lyons.
2240 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2241 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2242 Patch from Dirk Mueller <dmueller@suse.com>
2244 PP/13 tls_peerdn now print-escaped for spool files.
2245 Observed some $tls_peerdn in wild which contained \n, which resulted
2246 in spool file corruption.
2248 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2249 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2250 or write after TLS renegotiation, which otherwise led to messages
2253 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2254 as a tracking header (ie: a signed header comes before the signature).
2255 Patch from Wolfgang Breyha.
2257 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2258 comma-sep list; embedded commas doubled.
2260 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2262 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2264 Report and patch from Dmitry Banschikov.
2266 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2267 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2268 failures. We appear to now support TLS1.1+ with Exim.
2270 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2271 lets Exim select keys and certificates based upon TLS SNI from client.
2272 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2273 before an outbound SMTP session. New log_selector, +tls_sni.
2275 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2276 NULL dereference. Report and patch from Alun Jones.
2278 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2279 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2280 Not seeing resolver debug output on NetBSD, but suspect this is a
2281 resolver implementation change.
2283 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2284 Left warnings. Added "eximon gdb" invocation mode.
2286 PP/21 Defaulting "accept_8bitmime" to true, not false.
2288 PP/22 Added -bw for inetd wait mode support.
2290 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2291 locate the relevant includes and libraries. Made this the default.
2293 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2294 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2296 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2297 This may cause build issues on older platforms.
2299 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2300 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2301 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2302 Added SNI support via GnuTLS too.
2303 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2305 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2307 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2308 Applied second patch from Janne, implementing suggestion to default
2309 multiple-strings-in-record handling to match SPF spec.
2311 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2313 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2314 read-only, out of scope).
2315 Patch from Wolfgang Breyha, report from Stuart Northfield.
2317 PP/29 Fix three issues highlighted by clang analyser static analysis.
2318 Only crash-plausible issue would require the Cambridge-specific
2319 iplookup router and a misconfiguration.
2320 Report from Marcin Mirosław.
2322 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2324 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2325 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2326 As part of this, removing so much warning spew let me fix some minor
2327 real issues in debug logging.
2329 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2330 assignment on my part. Fixed.
2332 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2333 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2334 Janne Snabb (who went above and beyond: thank you).
2336 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2337 string otherwise requires a connection and a bunch more work and it's
2338 relatively easy to get wrong. Should also expose TLS library linkage
2341 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2342 64-bit ${eval} (JH/03).
2344 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2345 GNU libc to support some of the 64-bit stuff, should not lead to
2346 conflicts. Defined before os.h is pulled in, so if a given platform
2347 needs to override this, it can.
2349 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2350 protection layer was required, which is not implemented.
2351 Bugzilla 1254, patch from Wolfgang Breyha.
2353 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2354 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2355 tls_dhparam take prime identifiers. Also unbreak combination of
2356 OpenSSL+DH_params+TLSSNI.
2358 PP/39 Disable SSLv2 by default in OpenSSL support.
2364 PP/01 Solaris build fix for Oracle's LDAP libraries.
2365 Bugzilla 1109, patch from Stephen Usher.
2367 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2369 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2372 TF/02 Fix a couple more cases where we did not log the error message
2373 when unlink() failed. See also change 4.74-TF/03.
2375 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2376 lock up or crash if it happened to be inside a call to libc when it
2377 got a SIGUSR1 from exiwhat.
2379 The SIGUSR1 handler appends the current process status to the process
2380 log which is later printed by exiwhat. It used to use the general
2381 purpose logging code to do this, but several functions it calls are
2382 not safe for signals.
2384 The new output code in the SIGUSR1 handler is specific to the process
2385 log, and simple enough that it's easy to inspect for signal safety.
2386 Removing some special cases also simplifies the general logging code.
2387 Removing the spurious timestamps from the process log simplifies
2390 TF/04 Improved ratelimit ACL condition.
2392 The /noupdate option has been deprecated in favour of /readonly which
2393 has clearer semantics. The /leaky, /strict, and /readonly update modes
2394 are mutually exclusive. The update mode is no longer included in the
2395 database key; it just determines when the database is updated. (This
2396 means that when you upgrade Exim will forget old rate measurements.)
2398 Exim now checks that the per_* options are used with an update mode that
2399 makes sense for the current ACL. For example, when Exim is processing a
2400 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2401 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2402 must specify per_mail/readonly. If you omit the update mode it defaults to
2403 /leaky where that makes sense (as before) or /readonly where required.
2405 The /noupdate option is now undocumented but still supported for
2406 backwards compatibility. It is equivalent to /readonly except that in
2407 ACLs where /readonly is required you may specify /leaky/noupdate or
2408 /strict/noupdate which are treated the same as /readonly.
2410 A useful new feature is the /count= option. This is a generalization
2411 of the per_byte option, so that you can measure the throughput of other
2412 aggregate values. For example, the per_byte option is now equivalent
2413 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2415 The per_rcpt option has been generalized using the /count= mechanism
2416 (though it's more complicated than the per_byte equivalence). When it is
2417 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2418 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2419 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2420 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2421 Note that using per_rcpt with a non-readonly update mode in more than
2422 one ACL will cause the recipients to be double-counted. (The per_mail
2423 and per_byte options don't have this problem.)
2425 The handling of very low rates has changed slightly. If the computed rate
2426 is less than the event's count (usually one) then this event is the first
2427 after a long gap. In this case the rate is set to the same as this event's
2428 count, so that the first message of a spam run is counted properly.
2430 The major new feature is a mechanism for counting the rate of unique
2431 events. The new per_addr option counts the number of different
2432 recipients that someone has sent messages to in the last time period. It
2433 behaves like per_rcpt if all the recipient addresses are different, but
2434 duplicate recipient addresses do not increase the measured rate. Like
2435 the /count= option this is a general mechanism, so the per_addr option
2436 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2437 example, measure the rate that a client uses different sender addresses
2438 with the options per_mail/unique=$sender_address. There are further
2439 details in the main documentation.
2441 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2443 TF/06 Removed a few PCRE remnants.
2445 TF/07 Automatically extract Exim's version number from tags in the git
2446 repository when doing development or release builds.
2448 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2449 Bugzilla 879. Patch from Paul Fisher.
2451 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2452 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2455 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2457 PP/05 Variable $av_failed, true if the AV scanner deferred.
2458 Bugzilla 1078. Patch from John Horne.
2460 PP/06 Stop make process more reliably on build failure.
2461 Bugzilla 1087. Patch from Heiko Schlittermann.
2463 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2464 Bugzilla 1089. Patch from Heiko Schlittermann.
2466 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2467 Bugzilla 1131. Patch from Holger Weiß.
2469 PP/09 Handle IPv6 addresses with SPF.
2470 Bugzilla 860. Patch from Wolfgang Breyha.
2472 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2474 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2477 PP/11 match_* no longer expand right-hand-side by default.
2478 New compile-time build option, EXPAND_LISTMATCH_RHS.
2479 New expansion conditions, "inlist", "inlisti".
2481 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2483 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2485 PP/14 fix log_write() format string regression from TF/03.
2486 Bugzilla 1152. Patch from Dmitry Isaikin.
2492 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2494 PP/02 Harmonised TLS library version reporting; only show if debugging.
2495 Layout now matches that introduced for other libraries in 4.74 PP/03.
2497 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2499 PP/04 New "dns_use_edns0" global option.
2501 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2504 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2505 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2507 TK/01 Updated PolarSSL code to 0.14.2.
2508 Bugzilla 1097. Patch from Andreas Metzler.
2510 PP/07 Catch divide-by-zero in ${eval:...}.
2511 Fixes bugzilla 1102.
2513 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2516 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2517 format-string attack -- SECURITY: remote arbitrary code execution.
2519 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2520 time unintentionally subject to list matching rules, letting the header
2521 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2522 arbitrary string expansion). This allowed for information disclosure.
2524 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2525 INT_MIN/-1 -- value coerced to INT_MAX.
2531 NM/01 Workaround for PCRE version dependency in version reporting
2534 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2535 This fixes portability to compilers other than gcc, notably
2536 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2538 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2539 makefiles for portability to HP-UX and POSIX correctness.
2541 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2542 Also via indented variable definition in the Makefile.
2543 (Debugging by Oliver Heesakkers).
2545 PP/02 Restore caching of spamd results with expanded spamd_address.
2546 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2548 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2549 Improves build reliability. Fix from: Frank Elsner
2551 NM/02 Fix wide character breakage in the rfc2047 coding
2552 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2554 NM/03 Allow underscore in dnslist lookups
2555 Fixes bug 1026. Patch from Graeme Fowler
2557 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2558 Code patches from Adam Ciarcinski of NetBSD.
2560 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2563 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2564 is logged, to avoid truncation. Patch from John Horne.
2566 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2567 Patch from Jakob Hirsch.
2569 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2570 SQL string expansion failure details.
2571 Patch from Andrey Oktyabrski.
2573 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2574 Patch from Simon Arlott.
2576 PP/09 New lookups functionality failed to compile on old gcc which rejects
2577 extern declarations in function scope.
2578 Patch from Oliver Fleischmann
2580 PP/10 Use sig_atomic_t for flags set from signal handlers.
2581 Check getgroups() return and improve debugging.
2582 Fixed developed for diagnosis in bug 927 (which turned out to be
2585 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2586 Patch from Mark Zealey.
2588 PP/12 Bugzilla 1056: Improved spamd server selection.
2589 Patch from Mark Zealey.
2591 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2592 Based on patch from Heiko Schlittermann.
2594 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2595 Patch from Uwe Doering, sign-off by Michael Haardt.
2597 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2598 variable declaration deep within a block. Bug and patch from
2601 PP/15 lookups-Makefile IRIX compatibility coercion.
2603 PP/16 Make DISABLE_DKIM build knob functional.
2605 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2606 Patch by Simon Arlott
2608 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2609 variable argument macros. Our copy now differs from upstream.
2615 TF/01 Failure to get a lock on a hints database can have serious
2616 consequences so log it to the panic log.
2618 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2619 controlled using the smtp_confirmation log selector.
2621 TF/03 Include the error message when we fail to unlink a spool file.
2623 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2624 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2625 for maintaining out-of-tree patches for some time.
2627 PP/01 Bugzilla 139: Documentation and portability issues.
2628 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2629 Handle per-OS dynamic-module compilation flags.
2631 PP/02 Let /dev/null have normal permissions.
2632 The 4.73 fixes were a little too stringent and complained about the
2633 permissions on /dev/null. Exempt it from some checks.
2634 Reported by Andreas M. Kirchwitz.
2636 PP/03 Report version information for many libraries, including
2637 Exim version information for dynamically loaded libraries. Created
2638 version.h, now support a version extension string for distributors
2639 who patch heavily. Dynamic module ABI change.
2641 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2642 privilege escalation vulnerability whereby the Exim run-time user
2643 can cause root to append content of the attacker's choosing to
2646 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2649 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2650 If dropping privileges for untrusted macros, we disabled normal logging
2651 on the basis that it would fail; for the Exim run-time user, this is not
2652 the case, and it resulted in successful deliveries going unlogged.
2653 Fixed. Reported by Andreas Metzler.
2659 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2660 only prepend for the Resent-* case. Fixes regression introduced in
2661 Exim 4.70 by NM/22 for Bugzilla 607.
2663 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2664 increasing numbers of administrators be bitten by this.
2666 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2668 PP/03 Bugzilla 994: added openssl_options main configuration option.
2670 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2672 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2674 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2676 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2677 without a peer certificate, leading to a segfault because of an
2678 assumption that peers always have certificates. Be a little more
2679 paranoid. Problem reported by Martin Tscholak.
2681 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2682 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2683 NB: ClamAV planning to remove STREAM in "middle of 2010".
2684 CL also introduces -bmalware, various -d+acl logging additions and
2685 more caution in buffer sizes.
2687 PP/09 Implemented reverse_ip expansion operator.
2689 PP/10 Bugzilla 937: provide a "debug" ACL control.
2691 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2693 PP/12 Bugzilla 973: Implement --version.
2695 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2697 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2699 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2701 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2702 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2703 ignore trailing whitespace.
2705 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2707 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2710 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2711 Notification from Dr Andrew Aitchison.
2713 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2714 ExtendedDetectionInfo response format.
2715 Notification from John Horne.
2717 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2720 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2721 XSL and documented dependency on system catalogs, with examples of how
2724 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2727 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2728 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2729 configuration file which is writeable by the Exim user or group.
2731 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2732 of configuration files to cover files specified with the -C option if
2733 they are going to be used with root privileges, not just the default
2736 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2737 option (effectively making it always true).
2739 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2740 files to be used while preserving root privileges.
2742 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2743 that rogue child processes cannot use them.
2745 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2746 run-time user, instead of root.
2748 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2749 Exim run-time user without dropping privileges.
2751 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2752 result string, instead of calling string_vformat() twice with the same
2755 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2756 for other users. Others should always drop root privileges if they use
2757 -C on the command line, even for a whitelisted configure file.
2759 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2761 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2767 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2768 $data_path, and $header_path variables; fixed documentation bugs and
2771 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2772 exipick to access non-standard spools, including the "frozen" queue
2775 NM/01 Bugzilla 965: Support mysql stored procedures.
2776 Patch from Alain Williams
2778 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2780 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2781 Patch from Andreas Metzler
2783 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2784 Patch from Kirill Miazine
2786 NM/05 Bugzilla 671: Added umask to procmail example.
2788 JJ/03 installed exipick 20100323.0, fixing doc bug
2790 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2791 directory. Notification and patch from Dan Rosenberg.
2793 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2795 TK/02 Improve log output when DKIM signing operation fails.
2797 MH/01 Treat the transport option dkim_domain as a colon separated
2798 list, not as a single string, and sign the message with each element,
2799 omitting multiple occurences of the same signer.
2801 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2802 Bugzilla 985, 986. Patch by Simon Arlott
2804 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2805 Patch by Simon Arlott
2807 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2808 MBX locking. Notification from Dan Rosenberg.
2814 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2816 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2818 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2820 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2822 NM/04 Bugzilla 915: Flag broken perl installation during build.
2828 TK/01 Added patch by Johannes Berg that expands the main option
2829 "spamd_address" if it starts with a dollar sign.
2831 TK/02 Write list of recipients to X-Envelope-Sender header when building
2832 the mbox-format spool file for content scanning (suggested by Jakob
2835 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2836 (http://www.dcc-servers.net/) support via dccifd. Activated by
2837 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2839 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2840 by Mark Daniel Reidel <mr@df.eu>.
2842 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2843 When building exim an external PCRE library is now needed -
2844 PCRE is a system library on the majority of modern systems.
2845 See entry on PCRE_LIBS in EDITME file.
2847 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2848 conversation. Added nologin parameter to request.
2849 Patch contributed by Kirill Miazine.
2851 TF/01 Do not log submission mode rewrites if they do not change the address.
2853 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2855 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2856 log files in place. Contributed by Roberto Lima.
2858 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2860 TF/03 Bugzilla 615: When checking the local_parts router precondition
2861 after a local_part_suffix or local_part_prefix option, Exim now
2862 does not use the address's named list lookup cache, since this
2863 contains cached lookups for the whole local part.
2865 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2866 Robert Millan. Documentation is in experimental-spec.txt.
2868 TF/04 Bugzilla 668: Fix parallel build (make -j).
2870 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2872 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2873 Patch provided by Jan Srzednicki.
2875 TF/05 Leading white space used to be stripped from $spam_report which
2876 wrecked the formatting. Now it is preserved.
2878 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2879 that they are available at delivery time.
2881 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2883 TF/08 TLS error reporting now respects the incoming_interface and
2884 incoming_port log selectors.
2886 TF/09 Produce a more useful error message if an SMTP transport's hosts
2887 setting expands to an empty string.
2889 NM/06 Bugzilla 744: EXPN did not work under TLS.
2890 Patch provided by Phil Pennock.
2892 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2893 Patch provided by Richard Godbee.
2895 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2896 acl_smtp_notquit, added index entry.
2898 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2899 Patch provided by Eugene Bujak.
2901 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2902 accept(). Patch provided by Maxim Dounin.
2904 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2905 Patch provided by Phil Pennock.
2907 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2909 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2910 Patch provided by Brad "anomie" Jorsch.
2912 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2913 Patch provided by Dean Brooks.
2915 TK/05 Add native DKIM support (does not depend on external libraries).
2917 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2918 Patch provided by Graeme Fowler.
2920 NM/16 Bugzilla 851: Documentation example syntax fix.
2922 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2924 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2927 NM/19 Bugzilla 745: TLS version reporting.
2928 Patch provided by Phil Pennock.
2930 NM/20 Bugzilla 167: bool: condition support.
2931 Patch provided by Phil Pennock.
2933 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2934 clients. Patch provided by Phil Pennock.
2936 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2937 Patch provided by Brad "anomie" Jorsch.
2939 NM/23 Bugzilla 687: Fix misparses in eximstats.
2940 Patch provided by Heiko Schlittermann.
2942 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2943 Patch provided by Heiko Schlittermann.
2945 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2946 plus update to original patch.
2948 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2950 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2951 Patch provided by David Brownlee.
2953 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2955 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2957 NM/30 Bugzilla 888: TLS documentation bugfixes.
2959 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2961 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2962 Unlike the original bugzilla I have changed all shell scripts in src tree.
2964 NM/33 Bugzilla 898: Transport filter timeout fix.
2965 Patch by Todd Rinaldo.
2967 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2968 Patch by Serge Demonchaux.
2970 NM/35 Bugzilla 39: Base64 decode bug fixes.
2971 Patch by Jakob Hirsch.
2973 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2975 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2977 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2979 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2985 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2986 ALT-N's libdkim that I have put here:
2987 http://duncanthrax.net/exim-experimental/
2989 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2990 were called 'true' and it seems that C99 defines that as a reserved
2991 keyword to be used with 'bool' variable types. That means you could
2992 not include C99-style headers which use bools without triggering
2993 build errors in sieve.c.
2995 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2996 as mailq or other aliases. Changed the --help handling significantly
2997 to do whats expected. exim_usage() emits usage/help information.
2999 SC/01 Added the -bylocaldomain option to eximstats.
3001 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3003 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3005 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3011 PH/01 Another patch from the Sieve maintainer.
3013 PH/02 When an IPv6 address is converted to a string for single-key lookup
3014 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3015 dots are used instead of colons so that keys in lsearch files need not
3016 contain colons. This was done some time before quoting was made available
3017 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3018 (notated using the quote facility) so as to distinguish them from IPv4
3019 keys. This meant that lookups for IP addresses in host lists did not work
3020 for iplsearch lookups.
3022 This has been fixed by arranging for IPv6 addresses to be expressed with
3023 colons if the lookup type is iplsearch. This is not incompatible, because
3024 previously such lookups could never work.
3026 The situation is now rather anomalous, since one *can* have colons in
3027 ordinary lsearch keys. However, making the change in all cases is
3028 incompatible and would probably break a number of configurations.
3030 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3033 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3034 conversion specification without a maximum field width, thereby enabling
3035 a rogue spamd server to cause a buffer overflow. While nobody in their
3036 right mind would setup Exim to query an untrusted spamd server, an
3037 attacker that gains access to a server running spamd could potentially
3038 exploit this vulnerability to run arbitrary code as the Exim user.
3040 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3041 $primary_hostname instead of what libspf2 thinks the hosts name is.
3043 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3044 a directory entry by the name of the lookup key. Previously, if a
3045 symlink pointed to a non-existing file or a file in a directory that
3046 Exim lacked permissions to read, a lookup for a key matching that
3047 symlink would fail. Now it is enough that a matching directory entry
3048 exists, symlink or not. (Bugzilla 503.)
3050 PH/03 The body_linecount and body_zerocount variables are now exported in the
3053 PH/04 Added the $dnslist_matched variable.
3055 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3056 This means they are set thereafter only if the connection becomes
3059 PH/06 Added the client_condition to authenticators so that some can be skipped
3060 by clients under certain conditions.
3062 PH/07 The error message for a badly-placed control=no_multiline_responses left
3063 "_responses" off the end of the name.
3065 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3067 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3068 (without spaces) instead of just copying the configuration text.
3070 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3072 PH/11 Added $max_received_linelength.
3074 PH/12 Added +ignore_defer and +include_defer to host lists.
3076 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3077 way in which PCRE > 7.0 is built.
3079 PH/14 Implemented queue_only_load_latch.
3081 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3082 MAIL command. The effect was to mangle the value on 64-bit systems.
3084 PH/16 Another patch from the Sieve maintainer.
3086 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3088 PH/18 If a system quota error occurred while trying to create the file for
3089 a maildir delivery, the message "Mailbox is full" was not appended to the
3090 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3091 only to a quota excession during the actual writing of the file.
3093 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3094 characters?) which causes problems in log lines. The DN values are now
3095 passed through string_printing() before being added to log lines.
3097 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3098 and InterBase are left for another time.)
3100 PH/21 Added message_body_newlines option.
3102 PH/22 Guard against possible overflow in moan_check_errorcopy().
3104 PH/23 POSIX allows open() to be a macro; guard against that.
3106 PH/24 If the recipient of an error message contained an @ in the local part
3107 (suitably quoted, of course), incorrect values were put in $domain and
3108 $local_part during the evaluation of errors_copy.
3114 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3115 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3118 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3119 issue a MAIL command.
3121 PH/02 In an ACL statement such as
3123 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3125 if a client was not listed at all, or was listed with a value other than
3126 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3127 the condition was not true (as it should be), so access was not denied.
3128 The bug was that the ! inversion was incorrectly passed on to the second
3129 item. This has been fixed.
3131 PH/03 Added additional dnslists conditions == and =& which are different from
3132 = and & when the dns lookup returns more than one IP address.
3134 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3135 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3137 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3138 FSYNC, which compiles an option called disable_fsync that allows for
3139 bypassing fsync(). The documentation is heavily laced with warnings.
3141 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3143 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3144 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3145 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3146 including adding "make clean"; (3) Added -fPIC when compiling the test
3147 dynamically loaded module, to get rid of a warning.
3149 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3150 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3151 = 0s. The bug is otherwise harmless.
3153 PH/07 There was a bug in the dovecot authenticator such that the value of
3154 $auth1 could be overwritten, and so not correctly preserved, after a
3155 successful authentication. This usually meant that the value preserved by
3156 the server_setid option was incorrect.
3158 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3160 PH/09 Installed PCRE release 7.0.
3162 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3163 run for batched SMTP input. It is now run at the start of every message
3164 in the batch. While fixing this I discovered that the process information
3165 (output by running exiwhat) was not always getting set for -bs and -bS
3166 input. This is fixed, and it now also says "batched" for BSMTP.
3168 PH/11 Added control=no_pipelining.
3170 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3171 patch, slightly modified), and move the expansion of helo_data till after
3172 the connection is made in the smtp transport (so it can use these
3175 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3177 PH/14 Added log_selector = +pid.
3179 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3181 PH/16 Add ${if forany and ${if forall.
3183 PH/17 Added dsn_from option to vary the From: line in DSNs.
3185 PH/18 Flush SMTP output before performing a callout, unless control =
3186 no_callout_flush is set.
3188 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3189 was true (the default) a successful delivery failed to delete the retry
3190 item, thus causing premature timeout of the address. The bug is now
3193 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3195 PH/21 Long custom messages for fakedefer and fakereject are now split up
3196 into multiline responses in the same way that messages for "deny" and
3197 other ACL rejections are.
3199 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3200 with slight modification.
3202 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3203 draft, changing the syntax and factoring some duplicate code".
3205 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3206 for deliveries of the second and subsequent messages over the same SMTP
3209 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3210 ${reduce, with only minor "tidies".
3212 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3214 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3215 expansion side effects.
3217 PH/27 When a message times out after an over-quota error from an Exim-imposed
3218 quota, the bounce message says "mailbox is full". This message was not
3219 being given when it was a system quota that was exceeded. It now should
3222 MH/03 Made $recipients available in local_scan(). local_scan() already has
3223 better access to the recipient list through recipients_list[], but
3224 $recipients can be useful in postmaster-provided expansion strings.
3226 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3227 in the case of a MAIL command with additional options following the
3228 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3229 were accidentally chopped off.
3231 PH/29 SMTP synchronization checks are implemented when a command is read -
3232 there is a check that no more input is waiting when there shouldn't be
3233 any. However, for some commands, a delay in an ACL can mean that it is
3234 some time before the response is written. In this time, more input might
3235 arrive, invalidly. So now there are extra checks after an ACL has run for
3236 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3237 pipelining has not been advertised.
3239 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3241 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3242 returned in the SMTP response when smtp_return_error_details was false.
3243 This has been fixed.
3245 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3246 instead of the C I/O that was originally supplied, because problems were
3247 reported on Solaris.
3249 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3250 Exim which did not show up earlier: it was assuming that a call to
3251 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3252 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3253 was a macro that became an assignment, so it seemed to work. This has
3254 changed to a proper function call with a void return, hence the compile
3255 error. Exim's code has been fixed.
3257 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3260 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3262 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3264 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3265 because it turns out to be too big or there is a timeout) there is no
3266 "Completed" line in the log. When some messages of this type were
3267 selected by exigrep, they were listed as "not completed". Others were
3268 picked up by some special patterns. I have improved the selection
3269 criteria to be more general.
3271 PH/38 The host_find_failed option in the manualroute router can now be set
3272 to "ignore", to completely ignore a host whose IP address cannot be
3273 found. If all hosts are ignored, the behaviour is controlled by the new
3274 host_all_ignored option.
3276 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3277 homing or because of multiple MX records with /mx) generated more than
3278 one IP address, and the following item turned out to be the local host,
3279 all the secondary addresses of the first item were incorrectly removed
3280 from the list, along with the local host and any following hosts (which
3281 is what is supposed to happen).
3283 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3284 whoever called Exim into the -H file. In the case of the daemon it was
3285 behaving confusingly. When first started, it used values for whoever
3286 started the daemon, but after a SIGHUP it used the Exim user (because it
3287 calls itself on a restart). I have changed the code so that it now always
3290 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3291 message are rejected with the same error (e.g. no authentication or bad
3292 sender address), and a DATA command is nevertheless sent (as can happen
3293 with PIPELINING or a stupid MUA), the error message that was given to the
3294 RCPT commands is included in the rejection of the DATA command. This is
3295 intended to be helpful for MUAs that show only the final error to their
3298 PH/42 Another patch from the Sieve maintainer.
3300 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3301 Eximstats - Fixed some broken HTML links and added missing column headers
3303 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3304 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3306 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3308 PH/43 Yet another patch from the Sieve maintainer.
3310 PH/44 I found a way to check for a TCP/IP connection going away before sending
3311 the response to the final '.' that terminates a message, but only in the
3312 case where the client has not sent further data following the '.'
3313 (unfortunately, this is allowed). However, in many cases there won't be
3314 any further data because there won't be any more messages to send. A call
3315 to select() can be used: if it shows that the input is "ready", there is
3316 either input waiting, or the socket has been closed. An attempt to read
3317 the next input character can distinguish the two cases. Previously, Exim
3318 would have sent an OK response which the client would never have see.
3319 This could lead to message repetition. This fix should cure that, at
3320 least in a lot of common cases.
3322 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3323 advertised in response to EHLO.
3329 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3330 fixed by 4.65/MH/01 (is this a record?) are fixed:
3332 (i) An empty string was always treated as zero by the numeric comparison
3333 operators. This behaviour has been restored.
3335 (ii) It is documented that the numeric comparison operators always treat
3336 their arguments as decimal numbers. This was broken in that numbers
3337 starting with 0 were being interpreted as octal.
3339 While fixing these problems I realized that there was another issue that
3340 hadn't been noticed. Values of message_size_limit (both the global option
3341 and the transport option) were treated as octal if they started with 0.
3342 The documentation was vague. These values are now always treated as
3343 decimal, and I will make that clear in the documentation.
3349 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3350 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3353 MH/01 Don't check that the operands of numeric comparison operators are
3354 integers when their expansion is in "skipping" mode (fixes bug
3355 introduced by 4.64-PH/07).
3357 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3358 child addresses, Exim now panics and dies. Previously, because the count
3359 is held in a short int, deliveries were likely to be lost. As such a
3360 large number of recipients for a single message is ridiculous
3361 (performance will be very, very poor), I have chosen to impose a limit
3362 rather than extend the field.
3368 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3369 leftover -K file (the existence of which was triggered by #402).
3370 While we were at it, introduced process PID as part of the -K
3371 filename. This should rule out race conditions when creating
3374 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3375 processing considerably. Previous code took too long for large mails,
3376 triggering a timeout which in turn triggers #401.
3378 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3379 in the DK code in transports.c. sendfile() is not really portable,
3380 hence the _LINUX specificness.
3382 TF/01 In the add_headers option to the mail command in an Exim filter,
3383 there was a bug that Exim would claim a syntax error in any
3384 header after the first one which had an odd number of characters
3387 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3388 callout verification, Exim cached a "reject" for the entire domain. This
3389 is correct for most verifications, but it is not correct for a recipient
3390 verification with use_sender or use_postmaster set, because in that case
3391 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3392 case of MAIL FROM:<> rejection from other early rejections (e.g.
3393 rejection of HELO). When verifying a recipient using a non-null MAIL
3394 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3395 Whatever the result of the callout, the value of the domain cache is
3396 left unchanged (for any other kind of callout, getting as far as trying
3397 RCPT means that the domain itself is ok).
3399 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3402 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3403 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3404 session, the daemon ignores ECONNECT errors and logs others; it now
3405 ignores EPIPE as well.
3407 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3408 (quoted-printable decoding).
3410 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3411 later the small subsequent patch to fix an introduced bug.
3413 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3415 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3417 PH/08 An error is now given if message_size_limit is specified negative.
3419 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3420 to be given (somewhat) arbitrary names.
3422 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3425 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3426 miscellaneous code fixes
3428 PH/10 Added the log_reject_target ACL modifier to specify where to log
3431 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3432 hostname. This is wrong, because it relates to the incoming message (and
3433 probably the interface on which it is arriving) and not to the outgoing
3434 callout (which could be using a different interface). This has been
3435 changed to use the value of the helo_data option from the smtp transport
3436 instead - this is what is used when a message is actually being sent. If
3437 there is no remote transport (possible with a router that sets up host
3438 addresses), $smtp_active_hostname is used.
3440 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3441 tweaks were necessary in order to get it to work (see also 21 below):
3442 (a) The code assumed that strncpy() returns a negative number on buffer
3443 overflow, which isn't the case. Replaced with Exim's string_format()
3445 (b) There were several signed/unsigned issues. I just did the minimum
3446 hacking in of casts. There is scope for a larger refactoring.
3447 (c) The code used strcasecmp() which is not a standard C function.
3448 Replaced with Exim's strcmpic() function.
3449 (d) The code set only $1; it now sets $auth1 as well.
3450 (e) A simple test gave the error "authentication client didn't specify
3451 service in request". It would seem that Dovecot has changed its
3452 interface. Fortunately there's a specification; I followed it and
3453 changed what the client sends and it appears to be working now.
3455 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3458 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3459 address A is aliased to B and C, where B exists and C does not. Without
3460 -v the output is "A verified" because verification stops after a
3461 successful redirection if more than one address is generated. However,
3462 with -v the child addresses are also verified. Exim was outputting "A
3463 failed to verify" and then showing the successful verification for C,
3464 with its parentage. It now outputs "B failed to verify", showing B's
3465 parentage before showing the successful verification of C.
3467 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3468 look up a TXT record in a specific list after matching in a combined
3471 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3472 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3473 they consult the DNS. I had assumed they would set it the way they
3474 wanted; and indeed my experiments on Linux seem to show that in some
3475 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3476 To be on the safe side, however, I have now made the interface to
3477 host_find_byname() similar to host_find_bydns(), with an argument
3478 containing the DNS resolver options. The host_find_byname() function now
3479 sets these options at its start, just as host_find_bydns() does. The smtp
3480 transport options dns_qualify_single and dns_search_parents are passed to
3481 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3482 of host_find_byname() use the default settings of RES_DEFNAMES
3483 (qualify_single) but not RES_DNSRCH (search_parents).
3485 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3486 spool_read_header() do less string testing, by means of a preliminary
3487 switch on the second character of optional "-foo" lines. (This is
3488 overdue, caused by the large number of possibilities that now exist.
3489 Originally there were few.) While I was there, I also converted the
3490 str(n)cmp tests so they don't re-test the leading "-" and the first
3491 character, in the hope this might squeeze out yet more improvement.
3493 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3494 flag allowing group syntax was set by the header_syntax check but not
3495 turned off, possible causing trouble later; (2) The flag was not being
3496 set at all for the header_verify test, causing "group"-style headers to
3497 be rejected. I have now set it in this case, and also caused header_
3498 verify to ignore an empty address taken from a group. While doing this, I
3499 came across some other cases where the code for allowing group syntax
3500 while scanning a header line wasn't quite right (mostly, not resetting
3501 the flag correctly in the right place). These bugs could have caused
3502 trouble for malformed header lines. I hope it is now all correct.
3504 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3505 with the "reply" argument non-NULL. The code, however (which originally
3506 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3507 but it didn't always do it. This confused somebody who was copying the
3508 code for some other use. I have removed all the tests.
3510 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3511 feature that was used to support insecure browsers during the U.S. crypto
3512 embargo. It requires special client support, and Exim is probably the
3513 only MTA that supported it -- and would never use it because real RSA is
3514 always available. This code has been removed, because it had the bad
3515 effect of slowing Exim down by computing (never used) parameters for the
3516 RSA_EXPORT functionality.
3518 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3519 authenticator to fail if there's a tab character in the incoming data
3520 (there should never be unless someone is messing about, as it's supposed
3521 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3522 if the connection is using TLS or if the remote IP is the same as the
3523 local IP, and the "valid-client-cert option" if a client certificate has
3526 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3527 authenticators. This can be used for authorization after authentication
3528 succeeds. (In the case of plaintext, it servers for both authentication
3531 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3532 if any retry times were supplied.
3534 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3535 connection, where there is no client IP address to check. In this
3536 situation, the verify now always succeeds.
3538 PH/25 Applied John Jetmore's -Mset patch.
3540 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3542 PH/27 In a string expansion for a processed (not raw) header when multiple
3543 headers of the same name were present, leading whitespace was being
3544 removed from all of them, but trailing whitespace was being removed only
3545 from the last one. Now trailing whitespace is removed from each header
3546 before concatenation. Completely empty headers in a concatenation (as
3547 before) are ignored.
3549 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3550 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3552 PH/29 [Removed. This was a change that I later backed out, and forgot to
3553 correct the ChangeLog entry (that I had efficiently created) before
3554 committing the later change.]
3556 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3557 address errors (4xx response to RCPT) over the same connection as other
3558 messages routed to the same hosts. Such deliveries are always "forced",
3559 so retry times are not inspected. This resulted in far too many retries
3560 for the affected addresses. The effect occurred only when there were more
3561 hosts than the hosts_max_try setting in the smtp transport when it had
3562 the 4xx errors. Those hosts that it had tried were not added to the list
3563 of hosts for which the message was waiting, so if all were tried, there
3564 was no problem. Two fixes have been applied:
3566 (i) If there are any address or message errors in an SMTP delivery, none
3567 of the hosts (tried or untried) are now added to the list of hosts
3568 for which the message is waiting, so the message should not be a
3569 candidate for sending over the same connection that was used for a
3570 successful delivery of some other message. This seems entirely
3571 reasonable: after all the message is NOT "waiting for some host".
3572 This is so "obvious" that I'm not sure why it wasn't done
3573 previously. Hope I haven't missed anything, but it can't do any
3574 harm, as the worst effect is to miss an optimization.
3576 (ii) If, despite (i), such a delivery is accidentally attempted, the
3577 routing retry time is respected, so at least it doesn't keep
3578 hammering the server.
3580 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3581 in ${readsocket because some servers need this prod.
3583 PH/32 Added some extra debug output when updating a wait-xxx database.
3585 PH/33 The hint "could be header name not terminated by colon", which has been
3586 given for certain expansion errors for a long time, was not being given
3587 for the ${if def:h_colon_omitted{... case.
3589 PH/34 The spec says: "With one important exception, whenever a domain list is
3590 being scanned, $domain contains the subject domain." There was at least
3591 one case where this was not true.
3593 PH/35 The error "getsockname() failed: connection reset by peer" was being
3594 written to the panic log as well as the main log, but it isn't really
3595 panic-worthy as it just means the connection died rather early on. I have
3596 removed the panic log writing for the ECONNRESET error when getsockname()
3599 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3600 runs only) independently of the message's sender address. This meant
3601 that, if the 4xx error was in fact related to the sender, a different
3602 message to the same recipient with a different sender could confuse
3603 things. In particular, this can happen when sending to a greylisting
3604 server, but other circumstances could also provoke similar problems.
3605 I have changed the default so that the retry time for these errors is now
3606 based a combination of the sender and recipient addresses. This change
3607 can be overridden by setting address_retry_include_sender=false in the
3610 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3611 remote server are returned as part of bounce messages. This was not
3612 happening for LMTP over a pipe (the lmtp transport), but now it is the
3613 same for both kinds of LMTP.
3615 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3616 in header lines that were in fact CNAMEs. This is no longer the case.
3618 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3619 and queue runs started by the daemon processed all messages. This has
3620 been fixed so that -R and -S can now usefully be given with -q<time>.
3622 PH/40 Import PCRE release 6.7 (fixes some bugs).
3624 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3626 PH/42 Give an error if -q is specified more than once.
3628 PH/43 Renamed the variables $interface_address and $interface_port as
3629 $received_ip_address and $received_port, to make it clear that these
3630 values apply to message reception, and not to the outgoing interface when
3631 a message is delivered. (The old names remain recognized, of course.)
3633 PH/44 There was no timeout on the connect() call when using a Unix domain
3634 socket in the ${readsocket expansion. There now is.
3636 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3637 be meaningful with "accept".
3639 SC/01 Eximstats V1.43
3640 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3642 SC/02 Eximstats V1.44
3643 Use a glob alias rather than an array ref in the generated
3644 parser. This improves both readability and performance.
3646 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3647 Collect SpamAssassin and rejection statistics.
3648 Don't display local sender or destination tables unless
3649 there is data to show.
3650 Added average volumes into the top table text output.
3652 SC/04 Eximstats V1.46
3653 Collect data on the number of addresses (recipients)
3654 as well as the number of messages.
3656 SC/05 Eximstats V1.47
3657 Added 'Message too big' to the list of mail rejection
3658 reasons (thanks to Marco Gaiarin).
3660 SC/06 Eximstats V1.48
3661 Mainlog lines which have GMT offsets and are too short to
3662 have a flag are now skipped.
3664 SC/07 Eximstats V1.49 (Alain Williams)
3665 Added the -emptyok flag.
3667 SC/08 Eximstats V1.50
3668 Fixes for obtaining the IP address from reject messages.
3670 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3671 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3672 whitespace changes from 4.64-PH/27
3674 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3677 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3678 are found, allow negative numbers in numeric criteria)
3680 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3682 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3683 to match changes made in 4.64-PH/43
3685 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3687 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3688 "domain" is actually an IP address, and force a failure. This locks out
3689 those revolvers/nameservers that support "A-for-A" lookups, in
3690 contravention of the specifications.
3692 PH/48 When a host name was looked up from an IP address, and the subsequent
3693 forward lookup of the name timed out, the host name was left in
3694 $sender_host_name, contrary to the specification.
3696 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3697 restricted to single-key lookups, Exim was not diagnosing an error if
3698 * or *@ was used with a query-style lookup.
3700 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3702 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3703 long ago, but noone interested enough thought of it. Let's just say that
3704 the "1.1" means that there are some new functions that weren't there at
3705 some point in the past.
3707 PH/51 Error processing for expansion failure of helo_data from an smtp
3708 transport during callout processing was broken.
3710 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3711 tested/used via the -bh/-bhc/-bs options.
3713 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3714 bug, fixed in subsequent PCRE releases).
3716 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3717 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3719 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3725 SC/01 Use a glob alias rather than an array ref in eximstats generated
3726 parser. This improves both readability and performance.
3728 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3729 Don't display local sender or destination tables in eximstats unless
3730 there is data to show.
3731 Added average volumes into the eximstats top table text output.
3733 SC/03 Collect data on the number of addresses (recipients) as well
3734 as the number of messages in eximstats.
3736 TF/01 Correct an error in the documentation for the redirect router. Exim
3737 does (usually) call initgroups() when daemonizing.
3739 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3740 with consistent privilege compared to when running as a daemon.
3742 TF/03 Note in the spec that $authenticated_id is not set for local
3743 submissions from trusted users.
3745 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3746 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3748 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3749 by adding some example configuration directives to the default
3750 configuration file. A little bit of work is required to uncomment the
3751 directives and define how usernames and passwords are checked, but
3752 there is now a framework to start from.
3754 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3755 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3756 without this. I don't know how relevant this is to other LDAP libraries.
3758 PH/02 Add the verb name to the "unknown ACL verb" error.
3760 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3762 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3764 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3765 directory not expanded when it should be if an expanded home directory
3766 was set for the address (which is overridden by the transport).
3768 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3771 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3772 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3773 because it is too late at that time, and has no effect.
3775 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3776 security issue with \' (bugzilla #107). I could not use the
3777 PQescapeStringConn() function, because it needs a PGconn value as one of
3780 PH/08 When testing addresses using -bt, indicate those final addresses that
3781 are duplicates that would not cause an additional delivery. At least one
3782 person was confused, thinking that -bt output corresponded to deliveries.
3783 (Suppressing duplicates isn't a good idea as you lose the information
3784 about possibly different redirections that led to the duplicates.)
3786 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3787 systems where poll() doesn't work, in particular OS X.
3789 PH/10 Added more information to debugging output for retry time not reached.
3791 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3792 operations in malware.c.
3794 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3797 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3798 syslog_duplication set false, log lines that would normally be written
3799 both the the main log and to the reject log were not written to syslog at
3802 PH/14 In the default configuration, change the use of "message" in ACL warn
3803 statements to "add_header".
3805 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3806 not followed by a command (e.g. "seen endif").
3808 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3809 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3812 PH/17 Added extra conditions to the default value of delay_warning_condition
3816 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3817 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3818 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3821 The Auto-Submitted: and various List- headers are standardised, whereas I
3822 don't think Precedence: ever was.
3824 PH/18 Refactored debugging code in route_finduser() to show more information,
3825 in particular, the error code if getpwnam() issues one.
3827 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3828 This is apparently needed in addition to the PH/07 change above to avoid
3829 any possible encoding problems.
3831 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3832 but not after initializing Perl.
3834 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3835 output them only if debugging. By default they are written stderr,
3836 apparently, which is not desirable.
3838 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3841 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3844 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3846 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3847 authenticated or an ident call has been made. Suppress the default
3848 values for $authenticated_id and $authenticated_sender (but permit -oMai
3849 and -oMas) when testing with -bh.
3851 PH/24 Re-jigged the order of the tests in the default configuration so that the
3852 tests for valid domains and recipients precede the DNS black list and CSA
3853 tests, on the grounds that those ones are more expensive.
3855 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3856 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3857 This bug exists in every version of Exim that I still have, right back to
3860 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3861 However, an attempt to turn on case-sensitivity in a regex key by
3862 including (?-i) didn't work because the subject string was already
3863 lowercased, and the effects were non-intuitive. It turns out that a
3864 one-line patch can be used to allow (?-i) to work as expected.
3870 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3871 other effects) broke the use of negated acl sub-conditions.
3873 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3876 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3877 "Deny" causes Exim to reject the incoming connection with a 554 error.
3878 Unfortunately, if there is a major crisis, such as a disk failure,
3879 tcp-wrappers gives "deny", whereas what one would like would be some
3880 kind of temporary error. A kludge has been added to help with this.
3881 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3882 554 error is used if errno is still zero or contains ENOENT (which occurs
3883 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3886 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3888 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3889 errors. Otherwise a message that provokes a temporary error (when other
3890 messages do not) can cause a whole host to time out.
3892 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3893 addresses were routed directly to files or pipes from a redirect router.
3894 File deliveries just didn't batch; pipe deliveries might have suffered
3897 PH/06 A failure to get a lock for a hints database would erroneously always say
3898 "Failed to get write lock", even when it was really a read lock.
3900 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3901 of 0600. This has been changed to use the value of the lockfile_mode
3902 option (which defaults to 0600).
3904 PH/08 Applied small patch from the Sieve maintainer.
3906 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3907 folder from quota calculations, a direct delivery into this folder messed
3908 up the contents of the maildirsize file. This was because the regex was
3909 used only to exclude .Trash (or whatever) when the size of the mailbox
3910 was calculated. There was no check that a delivery was happening into an
3911 excluded directory. This bug has been fixed by ignoring all quota
3912 processing for deliveries into excluded directories.
3914 PH/10 Added the maildirfolder_create_regex option to appendfile.
3920 PH/01 The code for finding all the local interface addresses on a FreeBSD
3921 system running IPv6 was broken. This may well have applied to all BSD
3922 systems, as well as to others that have similar system calls. The broken
3923 code found IPv4 interfaces correctly, but gave incorrect values for the
3924 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3925 that it would not match correctly against @[] and not recognize the IPv6
3928 PH/02 The ipliteral router was not recognizing addresses of the form user@
3929 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3931 PH/03 Added disable_ipv6.
3933 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3934 decoded form, because it is most often used to construct To: headers
3935 lines in autoreplies, and the decoded form may well be syntactically
3936 invalid. However, $reply_address has leading white space removed, and all
3937 newlines turned into spaces so that the autoreply transport does not
3940 PH/05 If group was specified without a user on a router, and no group or user
3941 was specified on a transport, the group from the router was ignored.
3943 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3944 for visible compile-time settings that can be used to change these
3945 numbers, for those that want even more. Backwards compatibility with old
3946 spool files has been maintained. However, going back to a previous Exim
3947 release will lost any variables that are in spool files.
3949 PH/07 Two small changes when running in the test harness: increase delay when
3950 passing a TCP/IP connection to a new process, in case the original
3951 process has to generate a bounce, and remove special handling of
3952 127.0.0.2 (sic), which is no longer necessary.
3954 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3955 be the same on different OS.
3957 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3960 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3961 whether --show-vars was specified or not
3963 JJ/02 exipick: Added support for new ACL variable spool format introduced
3966 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3967 syntactically invalid From: or Reply-to: line, and a filter used this to
3968 generate an autoreply, and therefore failed to obtain an address for the
3969 autoreply, Exim could try to deliver to a non-existent relative file
3970 name, causing unrelated and misleading errors. What now happens is that
3971 it logs this as a hard delivery error, but does not attempt to create a
3974 PH/11 The exinext utility has a -C option for testing purposes, but although
3975 the given file was scanned by exinext itself; it wasn't being passed on
3976 when Exim was called.
3978 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3979 an end-of-file indication when reading a command response.
3981 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3982 compiled. In many other places in Exim, IPv6 addresses are always
3983 recognized, so I have changed this. It also means that IPv4 domain
3984 literals of the form [IPV4:n.n.n.n] are now always recognized.
3986 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3987 used if the router is not running as root, for example, when verifying at
3988 ACL time, or when using -bh. The debugging output from this situation was
3989 non-existent - all you got was a failure to exec. I have made two
3992 (a) Failures to set uid/gid, the current directory, or a process leader
3993 in a subprocess such as that created by queryprogram now generate
3994 suitable debugging output when -d is set.
3996 (b) The queryprogram router detects when it is not running as root,
3997 outputs suitable debugging information if -d is set, and then runs
3998 the subprocess without attempting to change uid/gid.
4000 PH/15 Minor change to Makefile for building test_host (undocumented testing
4003 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4004 additional section of a DNS packet that returns MX or SRV records.
4005 Instead, it always explicitly searches for A/AAAA records. This avoids
4006 major problems that occur when a DNS server includes only records of one
4007 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4008 fixed another bug: if SRV records were looked up and the corresponding
4009 address records were *not* found in the additional section, the port
4010 values from the SRV records were lost.
4012 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4013 using the correct key (the original address) when searching the retry
4014 rules in order to find which one to use for generating the retry hint.
4016 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4017 adding the default one. Similarly, if it contains a Reply-To: header, the
4018 errors_reply_to option, if set, is not used.
4020 PH/19 When calculating a retry time, Exim used to measure the "time since
4021 failure" by looking at the "first failed" field in the retry record. Now
4022 it does not use this if it is later than than the arrival time of the
4023 message. Instead it uses the arrival time. This makes for better
4024 behaviour in cases where some deliveries succeed, thus re-setting the
4025 "first failed" field. An example is a quota failure for a huge message
4026 when small messages continue to be delivered. Without this change, the
4027 "time since failure" will always be short, possible causing more frequent
4028 delivery attempts for the huge message than are intended.
4029 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4031 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4032 $1, $2, $3) because the numerical variables can be reset during some
4033 expansion items (e.g. "match"), thereby losing the authentication data.
4035 PH/21 Make -bV show the size of off_t variables so that the test suite can
4036 decide whether to run tests for quotas > 2G.
4038 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4039 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4040 filecount value is greater than 2G or if a quota value is greater than 2G
4041 on a system where the size of off_t is not greater than 4, a panic error
4044 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4045 never match. The debug and -bh output now contains an explicit error
4046 message indicating a malformed IPv4 address or mask.
4048 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4049 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4050 PH/23 above applies.
4052 PH/25 Do not write to syslog when running in the test harness. The only
4053 occasion when this arises is a failure to open the main or panic logs
4054 (for which there is an explicit test).
4056 PH/26 Added the /no_tell option to "control=freeze".
4058 PH/27 If a host name lookup failed very early in a connection, for example, if
4059 the IP address matched host_lookup and the reverse lookup yielded a name
4060 that did not have a forward lookup, an error message of the form "no IP
4061 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4062 could be logged. Now it outputs the IP address instead of "NULL".
4064 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4065 allows the sender and the authenticated sender to be set when
4066 submitting a message from within Exim. Since child_open_exim() is
4067 documented for local_scan(), the new function should be too.
4069 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4070 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4071 results in an empty string is now treated as unset.
4073 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4075 PH/31 Added sender_verify_fail logging option.
4077 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4078 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4079 tidied the source and removed it altogether.
4081 PH/33 When a queue run was abandoned because the load average was too high, a
4082 log line was always written; now it is written only if the queue_run log
4083 selector is set. In addition, the log line for abandonment now contains
4084 information about the queue run such as the pid. This is always present
4085 in "start" and "stop" lines but was omitted from the "abandon" line.
4087 PH/34 Omit spaces between a header name and the colon in the error message that
4088 is given when verify = headers_syntax fails (if there are lots of them,
4089 the message gets confusing).
4091 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4092 names, as there are now some PTR records that contain slashes. This check
4093 is only to protect against broken name servers that fall over on strange
4094 characters, so the fact that it applies to all lookups doesn't matter.
4096 PH/36 Now that the new test suite is complete, we can remove some of the
4097 special code in Exim that was needed for the old test suite. For example,
4098 sorting DNS records because real resolvers return them in an arbitrary
4099 order. The new test suite's fake resolver always returns records in the
4102 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4103 bounces) except when queue_only is set, to avoid logging races between
4104 the different processes.
4106 PH/38 Panic-die if .include specifies a non-absolute path.
4108 PH/39 A tweak to the "H" retry rule from its user.
4110 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4111 a label. They prevented compilation on older perls.
4113 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4114 a warning to be raised on newish perls.
4116 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4117 on queue. Changes to match documented behaviour of showing count of
4118 messages matching specified criteria.
4120 PH/40 Changed the default ident timeout from 30s to 5s.
4122 PH/41 Added support for the use of login_cap features, on those BSD systems
4123 that have them, for controlling the resources used by pipe deliveries.
4125 PH/42 The content-scanning code uses fopen() to create files in which to put
4126 message data. Previously it was not paying any attention to the mode of
4127 the files. Exim runs with umask(0) because the rest of the code creates
4128 files with open(), and sets the required mode explicitly. Thus, these
4129 files were ending up world-writeable. This was not a big issue, because,
4130 being within the spool directory, they were not world-accessible. I have
4131 created a function called modefopen, which takes an additional mode
4132 argument. It sets umask(777), creates the file, chmods it to the required
4133 mode, then resets the umask. All the relevant calls to fopen() in the
4134 content scanning code have been changed to use this function.
4136 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4137 to 24 hours. This avoids potential overflow problems when processing G
4138 and H retry rules. I suspect nobody ever tinkers with this value.
4140 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4142 PH/45 When the plaintext authenticator is running as a client, the server's
4143 challenges are checked to ensure they are valid base64 strings. By
4144 default, the authentication attempt is cancelled if an invalid string is
4145 received. Setting client_ignore_invalid_base64 true ignores these errors.
4146 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4147 they are received. Thus, the responses can be made to depend on the
4148 challenges. If an invalid string is ignored, an empty string is placed in
4151 PH/46 Messages that are created by the autoreply transport now contains a
4152 References: header, in accordance with RFCs 2822 and 3834.
4154 PH/47 Added authenticated_sender_force to the smtp transport.
4156 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4158 PH/49 Installed latest patch from the Sieve maintainer.
4160 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4161 was also set, the appendfile transport was unnecessarily scanning a
4162 directory of message files (e.g. for maildir delivery) to find the count
4163 of files (along with the size), even though it did not need this
4164 information. It now does the scan only if it needs to find either the
4165 size of the count of files.
4167 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4169 PH/52 Two bugs concerned with error handling when the smtp transport is
4172 (i) Exim was not creating retry information for temporary errors given
4173 for individual recipients after the DATA command when the smtp transport
4174 was used in LMTP mode. This meant that they could be retried too
4175 frequently, and not timed out correctly.
4177 (ii) Exim was setting the flag that allows error details to be returned
4178 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4179 recipients that were returned after the DATA command.
4181 PH/53 This is related to PH/52, but is more general: for any failing address,
4182 when detailed error information was permitted to be returned to the
4183 sender, but the error was temporary, then after the final timeout, only
4184 "retry timeout exceeded" was returned. Now it returns the full error as
4185 well as "retry timeout exceeded".
4187 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4188 do this, and (what is worse) MTAs that accept it.
4190 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4191 will now be deprecated.
4193 PH/56 New os.c-cygwin from the Cygwin maintainer.
4195 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4196 formats (previously only available in exim formats via -bpr, -bpru,
4197 and -bpra. Now also available in native and exiqgrep formats)
4199 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4200 with very large, slow to parse queues
4202 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4204 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4206 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4207 responses to authentication challenges, though it was showing the
4208 challenges; (ii) I've removed the CR characters from the debug output for
4211 PH/58 Allow for the insertion of a newline as well as a space when a string
4212 is turned into more than one encoded-word during RFC 2047 encoding. The
4213 Sieve code now uses this.
4215 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4216 data_4xx, lost_connection, tls_required.
4218 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4219 message was being sent as an SMTP response.
4221 PH/61 Add -l and -k options to exicyclog.
4223 PH/62 When verifying, if an address was redirected to one new address, so that
4224 verification continued, and the new address failed or deferred after
4225 having set something in $address_data, the value of $address_data was not
4226 passed back to the ACL. This was different to the case when no
4227 redirection occurred. The value is now passed back in both cases.
4229 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4230 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4231 use login_cap.h, so on its own it isn't the distinguishing feature. The
4232 new name refers directly to the setclassresources() function.
4234 PH/65 Added configuration files for NetBSD3.
4236 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4238 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4239 is preferred over IPv4.
4241 PH/68 The bounce_return_message and bounce_return_body options were not being
4242 honoured for bounces generated during the reception of non-SMTP messages.
4243 In particular, this applied to messages rejected by the ACL. This bug has
4244 been fixed. However, if bounce_return_message is true and bounce_return_
4245 body is false, the headers that are returned for a non-SMTP message
4246 include only those that have been read before the error was detected.
4247 (In the case of an ACL rejection, they have all been read.)
4249 PH/69 The HTML version of the specification is now built in a directory called
4250 spec_html instead of spec.html, because the latter looks like a path with
4251 a MIME-type, and this confuses some software.
4253 PH/70 Catch two compiler warnings in sieve.c.
4255 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4256 function verify_get_ident() calls ip_connect() to connect a socket, but
4257 if the "connect()" function timed out, ip_connect() used to close the
4258 socket. However, verify_get_ident() also closes the socket later, and in
4259 between Exim writes to the log, which may get opened at this point. When
4260 the socket was closed in ip_connect(), the log could get the same file
4261 descriptor number as the socket. This naturally causes chaos. The fix is
4262 not to close the socket in ip_connect(); the socket should be closed by
4263 the function that creates it. There was only one place in the code where
4264 this was missing, in the iplookup router, which I don't think anybody now
4265 uses, but I've fixed it anyway.
4267 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4268 well as to direct DNS lookups. Otherwise the handling of names in host
4269 lists is inconsistent and therefore confusing.
4275 PH/01 Two changes to the default runtime configuration:
4277 (1) Move the checks for relay_from_hosts and authenticated clients from
4278 after to before the (commented out) DNS black list checks.
4280 (2) Add control=submission to the relay_from_hosts and authenticated
4281 clients checks, on the grounds that messages accepted by these
4282 statements are most likely to be submissions.
4284 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4286 (1) Generate an error if the third argument for the ${prvs expansion is
4289 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4292 (3) Reset the variables that are obtained from the first argument of
4293 ${prvscheck and used in the second argument before leaving the code,
4294 because their memory is reclaimed, so using them afterwards may do
4297 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4298 one (it's much easier than Tom thought :-).
4300 (5) Because of (4), we can now allow for the use of $prvscheck_result
4301 inside the third argument.
4303 PH/03 For some reason, the default setting of PATH when running a command from
4304 a pipe transport was just "/usr/bin". I have changed it to
4307 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4308 anything to be listed in the output from -bV.
4310 PH/05 When a filter generated an autoreply, the entire To: header line was
4311 quoted in the delivery log line, like this:
4313 => >A.N.Other <ano@some.domain> <original@ddress> ...
4315 This has been changed so that it extracts the operative address. There
4316 may be more than one such address. If so, they are comma-separated, like
4319 => >ano@some.domain,ona@other.domain <original@ddress> ...
4321 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4322 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4323 not being looked up in the rDNS to get a host name, Exim was showing the
4324 IP address twice in Received: lines, even though the IP addresses were
4325 identical. For example:
4327 Received: from [1.2.3.4] (helo=[1.2.3.4])
4329 However, if the real host name was known, it was omitting the HELO data
4330 if it matched the actual IP address. This has been tidied up so that it
4331 doesn't show the same IP address twice.
4333 PH/07 When both +timestamp and +memory debugging was on, the value given by
4334 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4335 called by the debug printing, thereby overwriting the timestamp buffer.
4336 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4338 PH/08 When the original message was included in an autoreply transport, it
4339 always said "this is a copy of the message, including all the headers",
4340 even if body_only or headers_only was set. It now gives an appropriate
4343 PH/09 Applied a patch from the Sieve maintainer which:
4345 o fixes some comments
4346 o adds the (disabled) notify extension core
4347 o adds some debug output for the result of if/elsif tests
4348 o points to the current vacation draft in the documentation
4349 and documents the missing references header update
4353 o fixes a bug in processing the envelope test (when testing
4354 multiple envelope elements, the last element determined the
4357 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4358 Electronic Mail") by including:
4360 Auto-submitted: auto-generated
4362 in the messages that it generates (bounce messages and others, such as
4363 warnings). In the case of bounce messages for non-SMTP messages, there was
4364 also a typo: it was using "Auto_submitted" (underscore instead of
4365 hyphen). Since every message generated by Exim is necessarily in response
4366 to another message, thes have all been changed to:
4368 Auto-Submitted: auto-replied
4370 in accordance with these statements in the RFC:
4372 The auto-replied keyword:
4374 - SHOULD be used on messages sent in direct response to another
4375 message by an automatic process,
4377 - MUST NOT be used on manually-generated messages,
4379 - MAY be used on Delivery Status Notifications (DSNs) and Message
4380 Disposition Notifications (MDNs),
4382 - MUST NOT be used on messages generated by automatic or periodic
4383 processes, except for messages which are automatic responses to
4386 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4387 to the default Received: header definition.
4389 PH/12 Added log selector acl_warn_skipped (default on).
4391 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4392 variables because (a) they are in the wrong storage pool and (b) even if
4393 they were copied, it wouldn't work properly because of the caching.
4395 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4396 checking when decoding. Apparently there are clients that generate
4397 overlong encoded strings. Why am I not surprised?
4399 PH/15 If the first argument of "${if match_address" was not empty, but did not
4400 contain an "@" character, Exim crashed. Now it writes a panic log message
4401 and treats the condition as false.
4403 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4405 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4406 extension "envelope-auth". The code is finished and in agreement with
4407 other implementations, but there is no documentation so far and in fact,
4408 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4409 not changing the active code.
4411 Print executed "if" and "elsif" statements when debugging is used. This
4412 helps a great deal to understand what a filter does.
4414 Document more things not specified clearly in RFC3028. I had all this
4415 sorted out, when out of a sudden new issues came to my mind. Oops."
4417 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4420 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4421 canonical form (as documented). However, after a host name lookup from
4422 the IP address, check_host() was doing a simple string comparison with
4423 addresses acquired from the DNS when checking that the found name did
4424 have the original IP as one of its addresses. Since any found IPv6
4425 addresses are likely to be in abbreviated form, the comparison could
4426 fail. Luckily, there already exists a function for doing the comparison
4427 by converting both addresses to binary, so now that is used instead of
4428 the text comparison.
4430 PH/20 There was another similar case to PH/19, when a complete host name was
4431 given in a host list; looking up its IP address could give an abbreviated
4432 form, whereas the current host's name might or might not be abbreviated.
4433 The same fix has been applied.
4439 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4440 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4443 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4444 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4446 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4448 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4449 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4450 Also, for "Auto-Submitted", treat anything other than "no" as
4451 non-personal, in accordance with RFC 3834. (Previously it treated
4452 anything starting "auto-" as non-personal.)
4454 TF/01 The control=submission/name=... option had a problem with syntax
4455 errors if the name included a slash character. The /name= option
4456 now slurps the rest of the string, so it can include any characters
4457 but it must come last in the list of options (after /sender_retain
4460 PH/05 Some modifications to the interface to the fake nameserver for the new
4468 TK/01 Added the "success_on_redirect" address verification option. See
4469 NewStuff for rationale and an example.
4471 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4473 PH/02 Patch to exigrep to allow it to work on syslog lines.
4475 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4476 fread() to skip over the body file's header line, because in Cygwin the
4477 header line is locked and is inaccessible.
4479 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4480 co-exist for some time) to make it clear that it is the Exim ID that is
4481 referenced, not the Message-ID: header line.
4483 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4484 string_format() function, because snprintf() does not exist on all
4487 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4488 ${stat: expansion item.
4490 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4491 protocol synchronization error", to keep the pedants happy.
4493 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4494 well as for IRIX systems, when gcc is being used. See the host.c source
4497 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4499 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4502 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4503 transport and to the smtp transport in LMTP mode.
4505 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4507 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4508 run a filter in a subprocess. This could lead to confusion in subsequent
4509 lookups in the parent process. There should also be a search_tidyup() at
4510 the end of the subprocess.
4512 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4513 only if the host matched helo_try_verify_hosts, which caused the
4514 verification to occur when the EHLO/HELO command was issued. The ACL just
4515 tested the remembered result. Now, if a previous verification attempt has
4516 not happened, "verify = helo" does it there and then.
4518 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4520 TK/03 Fix log output including CR from clamd.
4522 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4523 exist provoked a memory error which could cause a segfault.
4525 PH/15 Installed PCRE 6.2
4527 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4529 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4530 of the problem. Specifically, suggested +O2 rather than +O1 for the
4533 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4535 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4536 record, the port was not correctly logged when the outgoing_port log
4537 selector was set (it logged the transort's default port).
4539 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4540 fallback_hosts, and "hosts" in the smtp transport.
4542 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4543 host errors such as "Connection refused".
4545 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4546 authentication with radiusclient 0.4.9:
4548 - Error returned from rc_read_config was caught wrongly
4549 - Username/password not passed on to radius server due to wrong length.
4551 The presumption is that some radiusclient API changes for 4.51/PH/17
4552 were not taken care of correctly. The code is still untested by me (my
4553 Linux distribution still has 0.3.2 of radiusclient), but it was
4554 contributed by a Radius user.
4556 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4557 expanding the "port" option of the smtp transport.
4559 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4560 while reading a MIME header. Thanks to Tom Hughes for a patch.
4562 PH/24 Include config.h inside local_scan.h so that configuration settings are
4565 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4566 that in an ACL for RCPT (for example), you can examine exactly what was
4569 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4570 commands, but it was not correctly comparing the address with the actual
4571 client host address. Thus, it would show the EHLO address in Received:
4572 header lines when this was not necessary.
4574 PH/27 Added the % operator to ${eval:}.
4576 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4577 it should be ignoring failures (because with -C, for example, it has lost
4578 privilege). It wasn't ignoring creation failures other than "already
4581 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4584 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4585 because an input line was too long, either on its own, or by virtue of
4586 too many continuations, the temporary file was not being removed, and the
4587 return code was incorrect.
4589 PH/31 Missing "BOOL" in function definition in filtertest.c.
4591 PH/32 Applied Sieve patches from the maintainer.
4593 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4595 PH/33 Added "verify = not_blind".
4597 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4598 Local/Makefile (with some defaults set). These are used in built scripts
4599 such as exicyclog, but they have never been used in the exim_install
4600 script (though there are many overriding facilities there). I have
4601 arranged that the exim_install script now takes note of these two
4604 PH/35 Installed configuration files for Dragonfly.
4606 PH/36 When a locally submitted message by a trusted user did not contain a
4607 From: header, and the sender address was obtained from -f or from an SMTP
4608 MAIL command, and the trusted user did not use -F to supply a sender
4609 name, $originator_name was incorrectly used when constructing a From:
4610 header. Furthermore, $originator_name was used for submission mode
4611 messages from external hosts without From: headers in a similar way,
4612 which is clearly wrong.
4614 PH/37 Added control=suppress_local_fixups.
4616 PH/38 When log_selector = +received_sender was set, and the addition of the
4617 sender made the log line's construction buffer exactly full, or one byte
4618 less than full, an overflow happened when the terminating "\n" was
4621 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4622 when the result of a list match is failure because a DNS lookup failed.
4624 PH/40 RM_COMMAND is now used in the building process.
4626 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4627 the "build-* directories that it finds.
4629 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4630 address in a domain literal was a prefix of an interface address.
4632 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4633 when verifying a sender address, unless rewrite_headers is false.
4635 PH/44 Wrote a long comment about why errors_to addresses are verified as
4636 recipients, not senders.
4638 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4639 the ratelimit ACL was added.
4641 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4643 PH/46 Added extra information about PostgreSQL errors to the error string.
4645 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4646 avoiding the need to install special zones in a real server. This is
4647 backwards compatible; if it can't find the fake resolver, it drops back.
4648 Thus, both old and new test suites can be run.
4650 TF/02 Added util/ratelimit.pl
4652 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4653 clock is set back in time.
4655 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4656 Candler <B.Candler@pobox.com>.
4658 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4659 OK for addresses that are the result of redirections.
4661 PH/48 A number of further additions for the benefit of the new test suite,
4662 including a fake gethostbyname() that interfaces to the fake DNS resolver
4665 TF/06 The fix for widen_domains has also been applied to qualify_single and
4666 search_parents which are the other dnslookup options that can cause
4669 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4672 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4674 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4675 service" if it encountered an MX record with an empty target hostname.
4676 The message is now "an MX or SRV record indicated no SMTP service".
4678 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4679 if the DNS of the sending site is misconfigured. This is quite a
4680 common situation. This change restores the behaviour of treating a
4681 helo verification defer as a failure.
4683 PH/51 If self=fail was set on a router, the bounce message did not include the
4684 actual error message.
4690 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4692 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4693 command itself ended in error, the underlying message about the transport
4694 filter timeout was being overwritten with the pipe command error. Now the
4695 underlying error message should be appended to the second error message.
4697 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4699 PH/02 Reduce the amount of output that "make" produces by default. Full output
4700 can still be requested.
4702 PH/03 The warning log line about a condition test deferring for a "warn" verb
4703 was being output only once per connection, rather than after each
4704 occurrence (because it was using the same function as for successful
4705 "warn" verbs). This seems wrong, so I have changed it.
4707 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4708 it should not have, which might have caused a crash in the right
4709 circumstances, but probably never did.
4711 PH/04 Installed a modified version of Tony Finch's patch to make submission
4712 mode fix the return path as well as the Sender: header line, and to
4713 add a /name= option so that you can make the user's friendly name appear
4716 TF/03 Added the control = fakedefer ACL modifier.
4718 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4719 Mark Lowes for thorough testing.
4721 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4723 TK/03 Merged latest SRS patch from Miles Wilton.
4725 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4726 with the definition in sysexits.h (which is #included earlier).
4727 Fortunately, Exim does not actually use EX_OK. The code used to try to
4728 preserve the sysexits.h value, by assuming that macro definitions were
4729 scanned for macro replacements. I have been disabused of this notion,
4730 so now the code just undefines EX_OK before #including unistd.h.
4732 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4733 in the smtp transport. When a block could not be written in a single
4734 write() function, the timeout was being re-applied to each part-write.
4735 This seems wrong - if the receiver was accepting one byte at a time it
4736 would take for ever. The timeout is now adjusted when this happens. It
4737 doesn't have to be particularly precise.
4739 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4740 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4742 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4743 without a domain if the check to <postmaster@domain> fails.
4745 SC/01 Eximstats: added -xls and the ability to specify output files
4746 (patch written by Frank Heydlauf).
4748 SC/02 Eximstats: use FileHandles for outputting results.
4750 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4752 SC/04 Eximstats: fixed display of large numbers with -nvr option
4754 SC/05 Eximstats: fixed merging of reports with empty tables.
4756 SC/06 Eximstats: added the -include_original_destination flag
4758 SC/07 Eximstats: removed tabs and trailing whitespace.
4760 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4762 TK/06 MBOX spool code: Add real "From " MBOX separator line
4763 so the .eml file is really in mbox format (even though
4764 most programs do not really care). Patch from Alex Miller.
4766 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4767 The latter is generated from $received_to and is only set if the
4768 message has one envelope recipient. SA can use these headers,
4769 obviously out-of-the-box. Patch from Alex Miller.
4771 PH/08 The ${def test on a variable was returning false if the variable's
4772 value was "0", contrary to what the specification has always said!
4773 The result should be true unless the variable is empty.
4775 PH/09 The syntax error of a character other than { following "${if
4776 def:variable_name" (after optional whitespace) was not being diagnosed.
4777 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4778 accidental colon was present, for example, could give incorrect results.
4780 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4781 result is used (not including appendfile, where other changes are about
4784 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4785 This involved changing a lot of size variables from int to off_t. It
4786 should work with maildirs and everything.
4788 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4789 spamd dying while we are connected to it.
4791 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4794 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4795 function for BDB 4.3.
4797 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4799 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4800 the sources for PCRE have been re-arranged and more files are now
4803 PH/15 The code I had for printing potentially long long variables in PH/11
4804 above was not the best (it lost precision). The length of off_t variables
4805 is now inspected at build time, and an appropriate printing format (%ld
4806 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4807 to be "long long int" or "long int". This is needed for the internal
4808 formatting function string_vformat().
4810 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4811 the configuration file to be ":syslog", then the script "guesses" where
4812 the logs files are, rather than using the compiled in default. In our
4813 case the guess is not the same as the compiled default, so the script
4814 suddenly stopped working when I started to use syslog. The patch checks
4815 to see if log_file_path is "". If so, it attempts to read it from exim
4816 with no configuration file to get the compiled in version, before it
4817 falls back to the previous guessing code."
4819 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4820 implementing BATV in an Exim configuration. See NewStuff for the gory
4823 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4824 Makefile that are specific to HP-UX.
4826 PH/18 If the "use_postmaster" option was set for a recipient callout together
4827 with the "random" option, the postmaster address was used as the MAIL
4828 FROM address for the random test, but not for the subsequent recipient
4829 test. It is now used for both.
4831 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4832 patch removes a few documentation additions to RFC 3028, because the
4833 latest draft now contains them. It adds the new en;ascii-case comparator
4834 and a new error check for 8bit text in MIME parts. Comparator and
4835 require names are now matched exactly. I enabled the subaddress
4836 extension, but it is not well tested yet (read: it works for me)."
4838 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4839 rework some of the code of TK/09 above to avoid the hardwired use of
4840 "%lld" and "long long". Replaced the call to snprintf() with a call to
4843 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4844 records point to non-existent hosts", "retry timeout exceeded", and
4845 "retry time not reached for any host after a long failure period".
4847 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4848 experimental DomainKeys support:
4850 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4851 (2) On an error such as an illegally used "control", the wrong name for
4852 the control was given.
4854 These problems did NOT occur unless DomainKeys support was compiled.
4856 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4858 PH/24 Added ${if match_ip condition.
4860 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4861 databases so that it will be absolutely obvious if a crash occurs in the
4862 DB library. This is a regular occurrence (often caused by mis-matched
4865 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4866 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4867 picked up on a user's system that detects such things. There doesn't seem
4868 to be a gcc warning option for this - only an attribute that has to be
4869 put on the function's prototype. It seems that in Fedora Core 4 they have
4870 set this on a number of new functions. No doubt there will be more in due
4873 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4874 specify a transport. However, if an address that was verified by such a
4875 router was the subject of a callout, Exim crashed because it tried to
4876 read the rcpt_include_affixes from the non-existent transport. Now it
4877 just assumes that the setting of that option is false. This bug was
4878 introduced by 4.51/PH/31.
4880 PH/28 Changed -d+all to exclude +memory, because that information is very
4881 rarely of interest, but it makes the output a lot bigger. People tend to
4882 do -d+all out of habit.
4884 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4885 code in os-type was giving problems when libc.so lives in lib64, like on
4888 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4889 aren't the modern standard, and it seems that some systems' include files
4890 don't always have them. Exim was already checking for some of the newer
4891 ones like T_AAAA, and defining it itself. I've added checks for all the
4892 record types that Exim uses.
4894 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4895 not automatically generating a new one, as it is supposed to. This
4896 prevented TLS from working. If the file did exist, but contained invalid
4897 data, a new version was generated, as expected. It was only the case of a
4898 non-existent file that was broken.
4900 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4901 with a change in libdomainkeys > 0.64.
4903 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4904 from DNS. If the selector record carries the flag, it now has
4905 precedence over the domain-wide flag.
4907 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4909 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4910 the use of a port name that isn't defined in /etc/services) occurred, the
4911 message was deferred as in a normal delivery, and thus remained on the
4912 spool, instead of being failed because of the mua_wrapper setting. This
4913 is now fixed, and I tidied up some of the mua_wrapper messages at the
4916 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4917 the messages in a hash of arrays rather than using individual hashes.
4918 This is a bit cleaner and results in dramatic memory savings, albeit
4919 at a slight CPU cost.
4921 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4922 as requested by Marc Sherman.
4924 SC/10 Eximstats: added histograms for user specified patterns as requested
4927 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4929 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4930 fopen() in the content-scanning modules that did not already have it.
4936 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4937 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4939 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4941 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4943 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4944 to test Sieve filters that use "vacation".
4946 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4947 that changes the way the GnuTLS parameters are stored in the cache file.
4948 The new format can be generated externally. For backward compatibility,
4949 if the data in the cache doesn't make sense, Exim assumes it has read an
4950 old-format file, and it generates new data and writes a new file. This
4951 means that you can't go back to an older release without removing the
4954 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4955 work if there are any delivery delays because "one_time" forces the
4956 parent to be marked "delivered", so its unseen clone is never tried
4957 again. For this reason, Exim now forbids the simultaneous setting of
4960 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4961 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4962 entry if you want to know the details. The fix, however, neglected to
4963 consider the case when local delivery batching is involved. The test for
4964 "previously delivered" was not happening when checking to see if an
4965 address could be batched with a previous (undelivered) one; under
4966 certain circumstances this could lead to multiple deliveries to the same
4969 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4970 in its include files, and this causes problems building Exim.
4972 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4973 header_syntax) but Exim was just ignoring anything given after a slash.
4974 In particular, this caused confusion with an attempt to use "verify =
4975 reverse_host_lookup/defer_ok". An error is now given when options are
4976 supplied for verify items that do not have them. (Maybe reverse_host_
4977 lookup should have a defer_ok option, but that's a different point.)
4979 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4980 defined by RFC 821) to 2048, because there were problems with some AUTH
4981 commands, and RFC 1869 says the size should be increased for extended
4982 SMTP commands that take arguments.
4984 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4987 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4988 "unknown" error; now it says that the functionality isn't in the binary.
4990 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4991 an address' error message when a string expansion fails (syntax or
4992 whatever). Otherwise the password may appear in the log. Following change
4993 PH/42 below, there is no longer a chance of it appearing in a bounce
4996 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4998 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4999 of its addresses was ever tried. (Bugzilla bug #2.)
5001 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5002 the result incorrectly in the debug output. (It correctly added a newline
5003 to what was transported.)
5005 TF/01 Added $received_time.
5007 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5008 commented out examples of how to interface to a virus scanner and to
5009 SpamAssassin. Also added commented examples of av_scanner and
5010 spamd_address settings.
5012 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5013 and controls are allowed in which ACLs. There were a couple of minor
5014 errors. Some of the entries in the conditions table (which is a table of
5015 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5016 negation of where the condition IS allowed.
5018 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5020 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5021 header file does not have a version number, so I've had to invent a new
5022 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5023 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5024 radiusclient), but it was contributed by a Radius user.
5026 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5027 files or directories, for OpenSSL.
5029 PH/19 When an Exim process that is running as root has to create an Exim log
5030 file, it does so in a subprocess that runs as exim:exim so as to get the
5031 ownership right at creation (otherwise, other Exim processes might see
5032 the file with the wrong ownership). There was no test for failure of this
5033 fork() call, which would lead to the process getting stuck as it waited
5034 for a non-existent subprocess. Forks do occasionally fail when resources
5035 run out. I reviewed all the other calls to fork(); they all seem to check
5038 PH/20 When checking for unexpected SMTP input at connect time (before writing
5039 the banner), Exim was not dealing correctly with a non-positive return
5040 from the read() function. If the client had disconnected by this time,
5041 the result was a log entry for a synchronization error with an empty
5042 string after "input=" when read() returned zero. If read() returned -1
5043 (an event I could not check), uninitialized data bytes were printed.
5044 There were reports of junk text (parts of files, etc) appearing after
5047 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5049 PH/22 Added support for macro redefinition, and (re)definition in between
5050 driver and ACL definitions.
5052 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5053 forgetting to use the resulting value; it was using the unexpanded value.
5055 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5056 hadn't been configured. The fix is from Juergen Kreileder, who
5057 understands it better than I do:
5059 "Here's what I see happening with three configured cyrus_sasl
5060 authenticators configured (plain, login, cram-md5):
5062 On startup auth_cyrus_sasl_init() gets called for each of these.
5063 This means three calls to sasl_listmech() without a specified mech_list.
5064 => SASL tests which mechs of all available mechs actually work
5065 => three warnings about OTP not working
5066 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5068 With the patch, sasl_listmech() also gets called three times. But now
5069 SASL's mech_list option is set to the server_mech specified in the the
5070 authenticator. Or in other words, the answer from sasl_listmech()
5071 gets limited to just the mech you're testing for (which is different
5073 => the return list contains just 'plain' or 'login', 'cram-md5' or
5074 nothing depending on the value of ob->server_mech.
5076 I've just tested the patch: Authentication still works fine,
5077 unavailable mechs specified in the exim configuration are still
5078 caught, and the auth.log warnings about OTP are gone."
5080 PH/25 When debugging is enabled, the contents of the command line are added
5081 to the debugging output, even when log_selector=+arguments is not
5084 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5085 answer is "GNU", and only if the return is "GNU/something" is the answer
5088 PH/27 $acl_verify_message is now set immediately after the failure of a
5089 verification in an ACL, and so is available in subsequent modifiers. In
5090 particular, the message can be preserved by coding like this:
5092 warn !verify = sender
5093 set acl_m0 = $acl_verify_message
5095 Previously, $acl_verify_message was set only while expanding "message"
5096 and "log_message" when a very denied access.
5098 PH/28 Modified OS/os.c-Linux with
5100 -#ifndef OS_LOAD_AVERAGE
5101 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5103 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5104 nomenclature these days.)
5106 PH/29 Installed patch from the Sieve maintainer that adds the options
5107 sieve_useraddress and sieve_subaddress to the redirect router.
5109 PH/30 In these circumstances:
5110 . Two addresses routed to the same list of hosts;
5111 . First host does not offer TLS;
5112 . First host accepts first address;
5113 . First host gives temporary error to second address;
5114 . Second host offers TLS and a TLS session is established;
5115 . Second host accepts second address.
5116 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5117 and peerdn, if requested) that were in fact used only for the second
5120 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5121 attention to any local part prefix or suffix that was matched by the
5122 router that accepted the address. It now behaves in the same way as it
5123 does for delivery: the affixes are removed from the local part unless
5124 rcpt_include_affixes is set on the transport.
5126 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5127 timeout during the DATA phase of an incoming message.
5129 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5130 applied a patch sanctioned by the Sieve maintainer.
5132 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5133 the uid or gid is negative. A case of a negative gid caused this to be
5134 noticed. The fix allows for either to be negative.
5136 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5137 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5140 PH/36 The change PH/12 above was broken. Fixed it.
5142 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5143 the grounds that routing the same address twice would always produce the
5144 same answer. This might have been true once, but it is certainly no
5145 longer true now. Routing a child address may depend on the previous
5146 routing that produced that child. Some complicated redirection strategies
5147 went wrong when messages had multiple recipients, and made Exim's
5148 behaviour dependent on the order in which the addresses were given.
5150 I have moved the duplicate checking until after the routing is complete.
5151 Exim scans the addresses that are assigned to local and remote
5152 transports, and removes any duplicates. This means that more work will be
5153 done, as duplicates will always all be routed, but duplicates are
5154 presumably rare, so I don't expect this is of any significance.
5156 For deliveries to pipes, files, and autoreplies, the duplicate checking
5157 still happens during the routing process, since they are not going to be
5160 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5161 It corrects a timeout issue with spamd. This is Ian's comment: "The
5162 background is that sometimes spamd either never reads data from a
5163 connection it has accepted, or it never writes response data. The exiscan
5164 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5165 blindly assumes that writes won't block so it may never time out."
5167 PH/39 Allow G after quota size as well as K and M.
5169 PH/40 The value set for $authenticated_id in an authenticator may not contain
5170 binary zeroes or newlines because the value is written to log lines and
5171 to spool files. There was no check on this. Now the value is run through
5172 the string_printing() function so that such characters are converted to
5173 printable escape sequences.
5175 PH/41 $message_linecount is a new variable that contains the total number of
5176 lines in the message. Compare $body_linecount, which is the count for the
5179 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5180 bounce and delay warning messages, except in certain special cases, which
5183 (a) An SMTP error message from a remote host;
5184 (b) A message specified in a :fail: redirection;
5185 (c) A message specified in a "fail" command in a system filter;
5186 (d) A message specified in a FAIL return from the queryprogram router;
5187 (e) A message specified by the cannot_route_message router option.
5189 In these cases only, Exim does include the error details in bounce and
5190 warning messages. There are also a few cases where bland messages such
5191 as "unrouteable address" or "local delivery error" are given.
5193 PH/43 $value is now also set for the "else" part of a ${run expansion.
5195 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5196 being worked on, but at least Exim now implements the latest version to
5199 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5200 process to complete was treated as a delivery failure, a timeout while
5201 writing the message to the pipe was logged, but erroneously treated as a
5202 successful delivery. Such timeouts include transport filter timeouts. For
5203 consistency with the overall process timeout, these timeouts are now
5204 treated as errors, giving rise to delivery failures by default. However,
5205 there is now a new Boolean option for the pipe transport called
5206 timeout_defer, which, if set TRUE, converts the failures into defers for
5207 both kinds of timeout. A transport filter timeout is now identified in
5210 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5211 systems where "make" and "gmake" are different, calling "gmake" at top
5212 level broke things. I've arranged for the value of $(MAKE) to be passed
5213 from the Makefile to this script so that it can call the same version of
5217 A note about Exim versions 4.44 and 4.50
5218 ----------------------------------------
5220 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5221 changes of various kinds. As a consequence, a big documentation update was
5222 needed. This delayed the release for rather longer than seemed good, especially
5223 in the light of a couple of (minor) security issues. Therefore, the changes
5224 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5225 release. So 4.44 and 4.50 are in effect two different branches that both start
5228 I have left the 4.50 change log unchanged; it contains all the changes since
5229 4.43. The change log for 4.44 is below; many of its items are identical to
5230 those for 4.50. This seems to be the most sensible way to preserve the
5231 historical information.
5237 1. Minor wording change to the doc/README.SIEVE file.
5239 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5240 computation of the current number of files was incorrect.
5242 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5243 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5246 4. Give more explanation in the error message when the command for a transport
5247 filter fails to execute.
5249 5. There are several places where Exim runs a non-Exim command in a
5250 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5251 was being done only for the command run by the queryprogram router. It is
5252 now done for all such subprocesses. The other cases are: ${run, transport
5253 filters, and the commands run by the lmtp and pipe transports.
5255 6. Added CONFIGURE_GROUP build-time option.
5257 7. Some older OS have a limit of 256 on the maximum number of file
5258 descriptors. Exim was using setrlimit() to set 1000 as a large value
5259 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5260 systems. I've change it so that if it can't get 1000, it tries for 256.
5262 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5263 was an oversight, and furthermore, ever since the addition of extra
5264 controls (e.g. 4.43/32), the checks on when to allow different forms of
5265 "control" were broken. There should now be diagnostics for all cases when a
5266 control that does not make sense is encountered.
5268 9. Added the /retain_sender option to "control=submission".
5270 10. $recipients is now available in the predata ACL (oversight).
5272 11. Tidy the search cache before the fork to do a delivery from a message
5273 received from the command line. Otherwise the child will trigger a lookup
5274 failure and thereby defer the delivery if it tries to use (for example) a
5275 cached ldap connection that the parent has called unbind on.
5277 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5278 of $address_data from the recipient verification was clobbered by the
5279 sender verification.
5281 13. The value of address_data from a sender verification is now available in
5282 $sender_address_data in subsequent conditions in the ACL statement.
5284 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5286 15. Added a new option "connect=<time>" to callout options, to set a different
5289 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5290 was its contents. (It was OK if the option was not defined at all.)
5292 17. A "Completed" log line is now written for messages that are removed from
5293 the spool by the -Mrm option.
5295 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5296 information about exactly what failed.
5298 19. Added -dd to debug only the daemon process.
5300 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5301 handles timeouts, both on the server side and network timeouts. Renamed the
5302 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5304 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5305 It is now set to "smtps".
5307 22. $host_address is now set to the target address during the checking of
5308 ignore_target_hosts.
5310 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5311 being passed; this would have caused $sender_host_name to have been used if
5312 matching the list had actually called for a host name (not very likely,
5313 since this list is usually IP addresses). A host name is now passed as
5316 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5317 code that specifies a non-restarting handler (typically sigaction() in
5318 modern systems) in an attempt to fix a rare and obscure crash bug.
5320 25. Narrowed the window for a race in the daemon that could cause it to ignore
5321 SIGCHLD signals. This is not a major problem, because they are used only to
5322 wake it up if nothing else does.
5324 26. A malformed maildirsize file could cause Exim to calculate negative values
5325 for the mailbox size or file count. Odd effects could occur as a result.
5326 The maildirsize information is now recalculated if the size or filecount
5329 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5330 support for a long time. Removed HAVE_SYS_VFS_H.
5332 28. Installed the latest version of exipick from John Jetmore.
5334 29. In an address list, if the pattern was not a regular expression, an empty
5335 subject address (from a bounce message) matched only if the pattern was an
5336 empty string. Non-empty patterns were not even tested. This was the wrong
5337 because it is perfectly reasonable to use an empty address as part of a
5338 database query. An empty address is now tested by patterns that are
5339 lookups. However, all the other forms of pattern expect the subject to
5340 contain a local part and a domain, and therefore, for them, an empty
5341 address still always fails if the pattern is not itself empty.
5343 30. Exim went into a mad DNS loop when attempting to do a callout where the
5344 host was specified on an smtp transport, and looking it up yielded more
5345 than one IP address.
5347 31. Re-factored the code for checking spool and log partition space into a
5348 function that finds that data and another that does the check. The former
5349 is then used to implement four new variables: $spool_space, $log_space,
5350 $spool_inodes, and $log_inodes.
5352 32. The RFC2047 encoding function was originally intended for short strings
5353 such as real names; it was not keeping to the 75-character limit for
5354 encoded words that the RFC imposes. It now respects the limit, and
5355 generates multiple encoded words if necessary. To be on the safe side, I
5356 have increased the buffer size for the ${rfc2047: expansion operator from
5359 33. It is now permitted to omit both strings after an "if" condition; if the
5360 condition is true, the result is "true". As before, when the second string
5361 is omitted, a false condition yields an empty string. This makes it less
5362 cumbersome to write custom ACL and router conditions.
5364 34. Failure to deliver a bounce message always caused it to be frozen, even if
5365 there was an errors_to setting on the router. The errors_to setting is now
5368 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5369 canonical form (fully expanded) before being placed in
5370 $sender_host_address.
5372 36. The table in the code that translates DNS record types into text (T_A to
5373 "A" for instance) was missing entries for NS and CNAME. It is just possible
5374 that this could have caused confusion if both these types were looked up
5375 for the same domain, because the text type is used as part of Exim's
5376 per-process caching. But the chance of anyone hitting this buglet seems
5379 37. The dnsdb lookup has been extended in a number of ways.
5381 (1) There is a new type, "zns", which walks up the domain tree until it
5382 finds some nameserver records. It should be used with care.
5384 (2) There is a new type, "mxh", which is like "mx" except that it returns
5385 just the host names, not the priorities.
5387 (3) It is now possible to give a list of domains (or IP addresses) to be
5388 looked up. The behaviour when one of the lookups defers can be
5389 controlled by a keyword.
5391 (4) It is now possible to specify the separator character for use when
5392 multiple records are returned.
5394 38. The dnslists ACL condition has been extended: it is now possible to supply
5395 a list of IP addresses and/or domains to be looked up in a particular DNS
5398 39. Added log_selector=+queue_time_overall.
5400 40. When running the queue in the test harness, wait just a tad after forking a
5401 delivery process, to get repeatability of debugging output.
5403 41. Include certificate and key file names in error message when GnuTLS fails
5404 to set them up, because the GnuTLS error message doesn't include the name
5405 of the failing file when there is a problem reading it.
5407 42. Allow both -bf and -bF in the same test run.
5409 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5411 44. The "Exiscan patch" is now merged into the mainline Exim source.
5413 45. Sometimes the final signoff response after QUIT could fail to get
5414 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5415 < 0 before doing a fflush(). This bug looks as though it goes back to the
5416 introduction of TLS in release 3.20, but "sometimes" must have been rare
5417 because the tests only now provoked it.
5419 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5420 (this can affect the format of dates).
5422 47. exim_tidydb, when checking for the continued existence of a message for
5423 which it has found a message-specific retry record, was not finding
5424 messages that were in split spool directories. Consequently, it was
5425 deleting retry records that should have stayed in existence.
5427 48. Steve fixed some bugs in eximstats.
5429 49. The SPA authentication driver was not abandoning authentication and moving
5430 on to the next authenticator when an expansion was forced to fail,
5431 contradicting the general specification for all authenticators. Instead it
5432 was generating a temporary error. It now behaves as specified.
5434 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5435 (the order specifies the preference for clients). The order is now AES256,
5436 AES128, 3DES, ARCFOUR128.
5438 51. Small patch to Sieve code - explicitly set From: when generating an
5441 52. Exim crashed if a remote delivery caused a very long error message to be
5442 recorded - for instance if somebody sent an entire SpamAssassin report back
5443 as a large number of 550 error lines. This bug was coincidentally fixed by
5444 increasing the size of one of Exim's internal buffers (big_buffer) that
5445 happened as part of the Exiscan merge. However, to be on the safe side, I
5446 have made the code more robust (and fixed the comments that describe what
5449 53. Now that there can be additional text after "Completed" in log lines (if
5450 the queue_time_overall log selector is set), a one-byte patch to exigrep
5451 was needed to allow it to recognize "Completed" as not the last thing in
5454 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5455 patch that reportedly fixes this has been added. I am not expert enough to
5456 create a test for it. This is what the patch creator wrote:
5458 "I found a little strange behaviour of ldap code when working with
5459 Windows 2003 AD Domain, where users was placed in more than one
5460 Organization Units. When I tried to give exim partial DN, the exit code
5461 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5462 But simultaneously result of request was absolutely normal ldap result,
5463 so I produce this patch..."
5465 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5466 REFERENCE, so I have modified the code to exclude the patch when that macro
5469 55. Some experimental protocols are using DNS PTR records for new purposes. The
5470 keys for these records are domain names, not reversed IP addresses. The
5471 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5472 leaves it alone. Component reversal etc. now happens only for IP addresses.
5475 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5477 57. Double the size of the debug message buffer (to 2048) so that more of very
5478 long debug lines gets shown.
5480 58. The exicyclog utility now does better if the number of log files to keep
5481 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5483 59. Two changes related to the smtp_active_hostname option:
5485 (1) $smtp_active_hostname is now available as a variable.
5486 (2) The default for smtp_banner uses $smtp_active_hostname instead
5487 of $primary_hostname.
5489 60. The host_aton() function is supposed to be passed a string that is known
5490 to be a valid IP address. However, in the case of IPv6 addresses, it was
5491 not checking this. This is a hostage to fortune. Exim now panics and dies
5492 if the condition is not met. A case was found where this could be provoked
5493 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5494 components; fortuitously, this particular loophole had already been fixed
5495 by change 4.50/55 above.
5497 If there are any other similar loopholes, the new check in host_aton()
5498 itself should stop them being exploited. The report I received stated that
5499 data on the command line could provoke the exploit when Exim was running as
5500 exim, but did not say which command line option was involved. All I could
5501 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5502 running as the user.
5505 61. There was a buffer overflow vulnerability in the SPA authentication code
5506 (which came originally from the Samba project). I have added a test to the
5507 spa_base64_to_bits() function which I hope fixes it.
5510 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5511 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5513 63. The daemon start-up calls getloadavg() while still root for those OS that
5514 need the first call to be done as root, but it missed one case: when
5515 deliver_queue_load_max is set with deliver_drop_privilege. This is
5516 necessary for the benefit of the queue runner, because there is no re-exec
5517 when deliver_drop_privilege is set.
5519 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5520 This has been fixed.
5522 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5523 was in use, was not putting the data itself into the right store pool;
5524 consequently, it could be overwritten for a subsequent message in the same
5525 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5528 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5530 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5531 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5532 the function were treating the return as a boolean value, which happened to
5533 work because 0=false and not-0=true, but is not correct code.
5535 68. The host_aton() function was not handling scoped IPv6 addresses (those
5536 with, for example, "%eth0" on the end) correctly.
5538 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5539 negated items (that is, ~something) in unsigned ints. Some compilers
5540 apparently mutter when there is no cast.
5542 70. If an address verification called from an ACL failed, and did not produce a
5543 user-specific message (i.e. there was only a "system" message), nothing was
5544 put in $acl_verify_message. In this situation, it now puts the system
5547 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5548 session; change 4.31/43 added the unwanted input to the log line - except
5549 that it did not do this in the start of session case. It now does.
5551 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5552 This is wrong and can cause the other end to generate a synchronization
5553 error if it is another Exim or anything else that does the synchronization
5554 check. A QUIT command is no longer sent after a timeout.
5556 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5557 during host lookups.
5559 74. The defer_ok option of callout verification was not working if it was used
5560 when verifying addresses in header lines, that is, for this case:
5562 verify = header_sender/callout=defer_ok
5564 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5565 those file descriptors could be used for SMTP connections. If anything
5566 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5567 could be sent to the SMTP client, causing chaos. The daemon now opens
5568 stdin, stdout, and stderr to /dev/null when it puts itself into the
5571 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5572 log by default. The user can override this with suitable Perl magic.
5574 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5575 the log message when discard triggers, was not working for the DATA ACL or
5576 for the non-SMTP ACL.
5578 78. Error message wording change in sieve.c.
5580 79. If smtp_accept_max_per_host was set, the number of connections could be
5581 restricted to fewer than expected, because the daemon was trying to set up
5582 a new connection before checking whether the processes handling previous
5583 connections had finished. The check for completed processes is now done
5584 earlier. On busy systems, this bug wouldn't be noticed because something
5585 else would have woken the daemon, and it would have reaped the completed
5588 80. If a message was submitted locally by a user whose login name contained one
5589 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5590 It caused a spool format error. I have fixed the spool reading code. A
5591 related problem was that the "from" clause in the Received: line became
5592 illegal because of the space(s). It is now covered by ${quote_local_part.
5594 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5597 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5599 83. Patch from Sieve maintainer to fix unterminated string problem in
5600 "vacation" handling.
5602 84. Some minor changes to the Linux configuration files to help with other
5603 OS variants using glibc.
5605 85. One more patch for Sieve to update vacation handling to latest spec.
5608 ----------------------------------------------------
5609 See the note above about the 4.44 and 4.50 releases.
5610 ----------------------------------------------------
5616 1. Change 4.43/35 introduced a bug that caused file counts to be
5617 incorrectly computed when quota_filecount was set in an appendfile
5620 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5621 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5624 3. Give more explanation in the error message when the command for a transport
5625 filter fails to execute.
5627 4. There are several places where Exim runs a non-Exim command in a
5628 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5629 was being done only for the command run by the queryprogram router. It is
5630 now done for all such subprocesses. The other cases are: ${run, transport
5631 filters, and the commands run by the lmtp and pipe transports.
5633 5. Some older OS have a limit of 256 on the maximum number of file
5634 descriptors. Exim was using setrlimit() to set 1000 as a large value
5635 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5636 systems. I've change it so that if it can't get 1000, it tries for 256.
5638 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5639 was an oversight, and furthermore, ever since the addition of extra
5640 controls (e.g. 4.43/32), the checks on when to allow different forms of
5641 "control" were broken. There should now be diagnostics for all cases when a
5642 control that does not make sense is encountered.
5644 7. $recipients is now available in the predata ACL (oversight).
5646 8. Tidy the search cache before the fork to do a delivery from a message
5647 received from the command line. Otherwise the child will trigger a lookup
5648 failure and thereby defer the delivery if it tries to use (for example) a
5649 cached ldap connection that the parent has called unbind on.
5651 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5652 of $address_data from the recipient verification was clobbered by the
5653 sender verification.
5655 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5656 was its contents. (It was OK if the option was not defined at all.)
5658 11. A "Completed" log line is now written for messages that are removed from
5659 the spool by the -Mrm option.
5661 12. $host_address is now set to the target address during the checking of
5662 ignore_target_hosts.
5664 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5665 being passed; this would have caused $sender_host_name to have been used if
5666 matching the list had actually called for a host name (not very likely,
5667 since this list is usually IP addresses). A host name is now passed as
5670 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5671 code that specifies a non-restarting handler (typically sigaction() in
5672 modern systems) in an attempt to fix a rare and obscure crash bug.
5674 15. Narrowed the window for a race in the daemon that could cause it to ignore
5675 SIGCHLD signals. This is not a major problem, because they are used only to
5676 wake it up if nothing else does.
5678 16. A malformed maildirsize file could cause Exim to calculate negative values
5679 for the mailbox size or file count. Odd effects could occur as a result.
5680 The maildirsize information is now recalculated if the size or filecount
5683 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5684 support for a long time. Removed HAVE_SYS_VFS_H.
5686 18. Updated exipick to current release from John Jetmore.
5688 19. Allow an empty sender to be matched against a lookup in an address list.
5689 Previously the only cases considered were a regular expression, or an
5692 20. Exim went into a mad DNS lookup loop when doing a callout where the
5693 host was specified on the transport, if the DNS lookup yielded more than
5696 21. The RFC2047 encoding function was originally intended for short strings
5697 such as real names; it was not keeping to the 75-character limit for
5698 encoded words that the RFC imposes. It now respects the limit, and
5699 generates multiple encoded words if necessary. To be on the safe side, I
5700 have increased the buffer size for the ${rfc2047: expansion operator from
5703 22. Failure to deliver a bounce message always caused it to be frozen, even if
5704 there was an errors_to setting on the router. The errors_to setting is now
5707 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5708 canonical form (fully expanded) before being placed in
5709 $sender_host_address.
5711 24. Updated eximstats to version 1.33
5713 25. Include certificate and key file names in error message when GnuTLS fails
5714 to set them up, because the GnuTLS error message doesn't include the name
5715 of the failing file when there is a problem reading it.
5717 26. Expand error message when OpenSSL has problems setting up cert/key files.
5720 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5721 (this can affect the format of dates).
5723 28. exim_tidydb, when checking for the continued existence of a message for
5724 which it has found a message-specific retry record, was not finding
5725 messages that were in split spool directories. Consequently, it was
5726 deleting retry records that should have stayed in existence.
5728 29. eximstats updated to version 1.35
5729 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5730 1.35 - bugfix such that pie charts by volume are generated correctly
5732 30. The SPA authentication driver was not abandoning authentication and moving
5733 on to the next authenticator when an expansion was forced to fail,
5734 contradicting the general specification for all authenticators. Instead it
5735 was generating a temporary error. It now behaves as specified.
5737 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5738 (the order specifies the preference for clients). The order is now AES256,
5739 AES128, 3DES, ARCFOUR128.
5741 31. Small patch to Sieve code - explicitly set From: when generating an
5744 32. Exim crashed if a remote delivery caused a very long error message to be
5745 recorded - for instance if somebody sent an entire SpamAssassin report back
5746 as a large number of 550 error lines. This bug was coincidentally fixed by
5747 increasing the size of one of Exim's internal buffers (big_buffer) that
5748 happened as part of the Exiscan merge. However, to be on the safe side, I
5749 have made the code more robust (and fixed the comments that describe what
5752 33. Some experimental protocols are using DNS PTR records for new purposes. The
5753 keys for these records are domain names, not reversed IP addresses. The
5754 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5755 leaves it alone. Component reversal etc. now happens only for IP addresses.
5758 34. The host_aton() function is supposed to be passed a string that is known
5759 to be a valid IP address. However, in the case of IPv6 addresses, it was
5760 not checking this. This is a hostage to fortune. Exim now panics and dies
5761 if the condition is not met. A case was found where this could be provoked
5762 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5763 components; fortuitously, this particular loophole had already been fixed
5764 by change 4.50/55 or 4.44/33 above.
5766 If there are any other similar loopholes, the new check in host_aton()
5767 itself should stop them being exploited. The report I received stated that
5768 data on the command line could provoke the exploit when Exim was running as
5769 exim, but did not say which command line option was involved. All I could
5770 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5771 running as the user.
5774 35. There was a buffer overflow vulnerability in the SPA authentication code
5775 (which came originally from the Samba project). I have added a test to the
5776 spa_base64_to_bits() function which I hope fixes it.
5779 36. The daemon start-up calls getloadavg() while still root for those OS that
5780 need the first call to be done as root, but it missed one case: when
5781 deliver_queue_load_max is set with deliver_drop_privilege. This is
5782 necessary for the benefit of the queue runner, because there is no re-exec
5783 when deliver_drop_privilege is set.
5785 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5786 was in use, was not putting the data itself into the right store pool;
5787 consequently, it could be overwritten for a subsequent message in the same
5788 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5791 38. Sometimes the final signoff response after QUIT could fail to get
5792 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5793 < 0 before doing a fflush(). This bug looks as though it goes back to the
5794 introduction of TLS in release 3.20, but "sometimes" must have been rare
5795 because the tests only now provoked it.
5801 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5802 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5803 Now it returns an integer. A number of calls were still expecting a T/F
5804 return. Fortuitously, in all cases, the tests worked in OK situations,
5805 which is the norm. However, things would have gone wrong on any write
5806 failures on the smtp file descriptor. This function is used when sending
5807 messages over SMTP and also when doing verify callouts.
5809 2. When Exim is called to do synchronous delivery of a locally submitted
5810 message (the -odf or -odi options), it no longer closes stderr before doing
5813 3. Implemented the mua_wrapper option.
5815 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5817 5. Implemented the functions header_remove(), header_testname(),
5818 header_add_at_position(), and receive_remove_recipient(), and exported them
5821 6. If an ACL "warn" statement specified the addition of headers, Exim already
5822 inserted X-ACL-Warn: at the start if there was no header name. However, it
5823 was not making this test for the second and subsequent header lines if
5824 there were newlines in the string. This meant that an invalid header could
5825 be inserted if Exim was badly configured.
5827 7. Allow an ACL "warn" statement to add header lines at the start or after all
5828 the Received: headers, as well as at the end.
5830 8. Added the rcpt_4xx retry error code.
5832 9. Added postmaster_mailfrom=xxx to callout verification option.
5834 10. Added mailfrom=xxxx to the callout verification option, for verify=
5837 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5838 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5840 12. Inserted some casts to stop certain compilers warning when using pointer
5841 differences as field lengths or precisions in printf-type calls (mostly
5842 affecting debugging statements).
5844 13. Added optional readline() support for -be (dynamically loaded).
5846 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5847 same clock tick as a message's arrival, so that its received time was the
5848 same as the "first fail" time on the retry record, and that message
5849 remained on the queue past the ultimate address timeout, every queue runner
5850 would try a delivery (because it was past the ultimate address timeout) but
5851 after another failure, the ultimate address timeout, which should have then
5852 bounced the address, did not kick in. This was a "< instead of <=" error;
5853 in most cases the first failure would have been in the next clock tick
5854 after the received time, and all would be well.
5856 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5857 being recognized when the domain list was tested by the match_domain
5858 condition in an expansion string.
5860 16. Added the ${str2b64: operator.
5862 17. Exim was always calling setrlimit() to set a large limit for the number of
5863 processes, without checking whether the existing limit was already
5864 adequate. (It did check for the limit on file descriptors.) Furthermore,
5865 errors from getrlimit() and setrlimit() were being ignored. Now they are
5866 logged to the main and panic logs, but Exim does carry on, to try to do its
5867 job under whatever limits there are.
5869 18. Imported PCRE 5.0.
5871 19. Trivial typo in log message " temporarily refused connection" (the leading
5874 20. If the log selector return_path_on_delivery was set and an address was
5875 redirected to /dev/null, the delivery process crashed because it assumed
5876 that a return path would always be set for a "successful" delivery. In this
5877 case, the whole delivery is bypassed as an optimization, and therefore no
5880 21. Internal re-arrangement: the function for sending a challenge and reading
5881 a response while authentication was assuming a zero-terminated challenge
5882 string. It's now changed to take a pointer and a length, to allow for
5883 binary data in such strings.
5885 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5887 23. Exim was not respecting finduser_retries when seeking the login of the
5888 uid under which it was called; it was always trying 10 times. (The default
5889 setting of finduser_retries is zero.) Also, it was sleeping after the final
5890 failure, which is pointless.
5892 24. Implemented tls_on_connect_ports.
5894 25. Implemented acl_smtp_predata.
5896 26. If the domain in control=submission is set empty, Exim assumes that the
5897 authenticated id is a complete email address when it generates From: or
5898 Sender: header lines.
5900 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5901 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5902 chown and chgrp in /bin and hostname in /usr/bin.
5904 28. Exim was keeping the "process log" file open after each use, just as it
5905 does for the main log. This opens the possibility of it remaining open for
5906 long periods when the USR1 signal hits a daemon. Occasional processlog
5907 errors were reported, that could have been caused by this. Anyway, it seems
5908 much more sensible not to leave this file open at all, so that is what now
5911 29. The long-running daemon process does not normally write to the log once it
5912 has entered its main loop, and it closes the log before doing so. This is
5913 so that log files can straightforwardly be renamed and moved. However,
5914 there are a couple of unusual error situations where the daemon does write
5915 log entries, and I had neglected to close the log afterwards.
5917 30. The text of an SMTP error response that was received during a remote
5918 delivery was being truncated at 512 bytes. This is too short for some of
5919 the long messages that one sometimes sees. I've increased the limit to
5922 31. It is now possible to make retry rules that apply only when a message has a
5923 specific sender, in particular, an empty sender.
5925 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5926 it possible to be selective about when SMTP synchronization is enforced.
5928 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5930 32. Implemented hosts_connection_nolog.
5932 33. Added an ACL for QUIT.
5934 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5937 35. Added mailbox_size and mailbox_filecount to appendfile.
5939 36. Added control = no_multiline_responses to ACLs.
5941 37. There was a bug in the logic of the code that waits for the clock to tick
5942 in the case where the clock went backwards by a substantial amount such
5943 that the microsecond fraction of "now" was more than the microsecond
5944 fraction of "then" (but the whole seconds number was less).
5946 38. Added support for the libradius Radius client library this is found on
5947 FreeBSD (previously only the radiusclient library was supported).
5953 1. When certain lookups returned multiple values in the form name=value, the
5954 quoting of the values was not always being done properly. Specifically:
5955 (a) If the value started with a double quote, but contained no whitespace,
5957 (b) If the value contained whitespace other than a space character (i.e.
5958 tabs or newlines or carriage returns) it was not quoted.
5959 This fix has been applied to the mysql and pgsql lookups by writing a
5960 separate quoting function and calling it from the lookup code. The fix
5961 should probably also be applied to nisplus, ibase and oracle lookups, but
5962 since I cannot test any of those, I have not disturbed their existing code.
5964 2. A hit in the callout cache for a specific address caused a log line with no
5965 reason for rejecting RCPT. Now it says "Previous (cached) callout
5966 verification failure".
5968 3. There was an off-by-one bug in the queryprogram router. An over-long
5969 return line was truncated at 256 instead of 255 characters, thereby
5970 overflowing its buffer with the terminating zero. As well as fixing this, I
5971 have increased the buffer size to 1024 (and made a note to document this).
5973 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5974 when Exim is waiting for an SMTP response from a remote server, Exim
5975 restarts its select() call on the socket, thereby resetting its timeout.
5976 This is not a problem when such interrupts are rare. Somebody set up a cron
5977 job to run exiwhat every 2 minutes, which is less than the normal select()
5978 timeout (5 or 10 minutes). This meant that the select() timeout never
5979 kicked in because it was always reset. I have fixed this by comparing the
5980 time when an interrupt arrives with the time at the start of the first call
5981 to select(). If more time than the timeout has elapsed, the interrupt is
5982 treated as a timeout.
5984 5. Some internal re-factoring in preparation for the addition of Sieve
5985 extensions (by MH). In particular, the "personal" test is moved to a
5986 separate function, and given an option for scanning Cc: and Bcc: (which is
5987 not set for Exim filters).
5989 6. When Exim created an email address using the login of the caller as the
5990 local part (e.g. when creating a From: or Sender: header line), it was not
5991 quoting the local part when it contained special characters such as @.
5993 7. Installed new OpenBSD configuration files.
5995 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5996 try to make them clearer.
5998 9. Callout options, other than the timeout value, were being ignored when
5999 verifying sender addresses in header lines. For example, when using
6001 verify = header_sender/callout=no_cache
6003 the cache was (incorrectly) being used.
6005 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6006 only the Cygwin environment.
6008 11. When return_path_on_delivery was set as a log selector, if different remote
6009 addresses in the same message used different return paths and parallel
6010 remote delivery occurred, the wrong values would sometimes be logged.
6011 (Whenever a remote delivery process finished, the return path value from
6012 the most recently started remote delivery process was logged.)
6014 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6015 lines when AUTH and/or TLS are in use. This is the "received protocol"
6016 field. Exim used to use "asmtp" for authenticated SMTP, without any
6017 indication (in the protocol name) for TLS use. Now it follows the RFC and
6018 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6019 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6020 names appear in log lines as well as in Received: header lines.
6022 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6023 extensions, and comparison tests, and to fix some bugs.
6025 14. Changes to the "personal" filter test:
6027 (1) The test was buggy in that it was just doing the equivalent of
6028 "contains" tests on header lines. For example, if a user's address was
6029 anne@some.where, the "personal" test would incorrectly be true for
6031 To: susanne@some.where
6033 This test is now done by extracting each address from the header in turn,
6034 and checking the entire address. Other tests that are part of "personal"
6035 are now done using regular expressions (for example, to check local parts
6036 of addresses in From: header lines).
6038 (2) The list of non-personal local parts in From: addresses has been
6039 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6040 taken from the Sieve specification recommendations.
6042 (3) If the message contains any header line starting with "List-" it is
6043 treated as non-personal.
6045 (4) The test for "circular" in the Subject: header line has been removed
6046 because it now seems ill-conceived.
6048 15. Minor typos in src/EDITME comments corrected.
6050 16. Installed latest exipick from John Jetmore.
6052 17. If headers_add on a router specified a text string that was too long for
6053 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6054 of string_sprintf() is now avoided.
6056 18. $message_body_size was not set (it was always zero) when running the DATA
6057 ACL and the local_scan() function.
6059 19. For the "mail" command in an Exim filter, no default was being set for
6060 the once_repeat time, causing a random time value to be used if "once" was
6061 specified. (If the value happened to be <= 0, no repeat happened.) The
6062 default is now 0s, meaning "never repeat". The "vacation" command was OK
6063 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6064 (I found it when inspecting the code).
6066 20. There is now an overall timeout for performing a callout verification. It
6067 defaults to 4 times the callout timeout, which applies to individual SMTP
6068 commands during the callout. The overall timeout applies when there is more
6069 than one host that can be tried. The timeout is checked before trying the
6070 next host. This prevents very long delays if there are a large number of
6071 hosts and all are timing out (e.g. when the network connections are timing
6072 out). The value of the overall timeout can be changed by specifying an
6073 additional sub-option for "callout", called "maxwait". For example:
6075 verify = sender/callout=5s,maxwait=20s
6077 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6078 to the end before writing, but this should make it even safer).
6080 22. Exim was forgetting that it had advertised PIPELINING for the second and
6081 subsequent messages on an SMTP connection. It was also not resetting its
6082 memory on STARTTLS and an internal HELO.
6084 23. When Exim logs an SMTP synchronization error within a session, it now
6085 records whether PIPELINING has been advertised or not.
6087 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6088 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6089 rather than long int.
6091 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6093 26. Added the never_mail option to autoreply.
6099 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6100 crash if the getsockname() call failed; this can happen if a connection is
6101 closed very soon after it is established. The problem was simply in the
6102 order in which certain operations were done, causing Exim to try to write
6103 to the SMTP stream before it had set up the file descriptor. The bug has
6104 been fixed by making things happen in the correct order.
6110 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6111 before the connection was closed, thus losing the rejection response.
6113 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6114 some early Solaris releases, but causes trouble in current releases where
6115 socklen_t is defined.
6117 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6120 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6123 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6124 that releasing the top of it at the end releases what was used for sub-
6125 expansions (unless the block got too big). However, discard this block if
6126 the first thing is a variable or header, so that we can use its block when
6127 it is dynamic (useful for very large $message_headers, for example).
6129 6. Lookups now cache *every* query, not just the most recent. A new, separate
6130 store pool is used for this. It can be recovered when all lookup caches are
6131 flushed. Lookups now release memory at the end of their result strings.
6132 This has involved some general refactoring of the lookup sources.
6134 7. Some code has been added to the store_xxx() functions to reduce the amount
6135 of flapping under certain conditions.
6137 8. log_incoming_interface used to affect only the <= reception log lines. Now
6138 it causes the local interface and port to be added to several more SMTP log
6139 lines, for example "SMTP connection from", and rejection lines.
6141 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6143 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6145 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6146 could be overwritten at the end of the current message (or the start of a
6147 new message if it was set in a HELO ACL). The value is now preserved for
6148 the duration of the SMTP connection.
6150 12. If a transport had a headers_rewrite setting, and a matching header line
6151 contained an unqualified address, that address was qualified, even if it
6152 did not match any rewriting rules. The underlying bug was that the values
6153 of the flags that permit the existence of unqualified sender and recipient
6154 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6155 non-local messages, and by -bnq for local messages) were not being
6156 preserved with the message after it was received.
6158 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6159 "next input=" as part of the text comprising the host identity instead of
6160 the correct text. The code was using the same buffer for two different
6161 strings. However, depending on which order the printing function evaluated
6162 its arguments, the bug did not always show up. Under Linux, for example, my
6163 test suite worked just fine.
6165 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6166 doesn't work with some older versions of Perl. It has been changed to "my",
6167 which in any case is probably the better facility to use.
6169 15. A really picky compiler found some instances of statements for creating
6170 error messages that either had too many or two few arguments for the format
6173 16. The size of the buffer for calls to the DNS resolver has been increased
6174 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6175 for addresses that have a lot of PTR records. This alleviates a problem; it
6176 does not fully solve it.
6178 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6179 buffer now truncates the list and logs the incident, which is the same
6180 action as happens when Exim is looking up a host name and its aliases.
6181 Previously in this situation something unpredictable would happen;
6182 sometimes it was "internal error: store_reset failed".
6184 18. If a server dropped the connection unexpectedly when an Exim client was
6185 using GnuTLS and trying to read a response, the client delivery process
6186 crashed while trying to generate an error log message.
6188 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6189 string, for example:
6191 warn message = H1: something\nH2: something
6193 the text was added as a single header line from Exim's point of view
6194 though it ended up OK in the delivered message. However, searching for the
6195 second and subsequent header lines using $h_h2: did not work. This has been
6196 fixed. Similarly, if a system filter added multiple headers in this way,
6197 the routers could not see them.
6199 20. Expanded the error message when iplsearch is called with an invalid key to
6200 suggest using net-iplsearch in a host list.
6202 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6203 ACLs are no longer actually imposed (and a message to that effect is
6206 22. If a "gecos" field in a passwd entry contained escaped characters, in
6207 particular, if it contained a \" sequence, Exim got it wrong when building
6208 a From: or a Sender: header from that name. A second bug also caused
6209 incorrect handling when an unquoted " was present following a character
6210 that needed quoting.
6212 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6213 was not being matched caselessly.
6215 24. Arranged for all hyphens in the exim.8 source to be escaped with
6218 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6219 properly. Recipient callout cache records were still being keyed to include
6220 the sender, even when use_sender was set false. This led to far more
6221 callouts that were necessary. The sender is no longer included in the key
6222 when use_sender is false.
6224 26. Added "control = submission" modifier to ACLs.
6226 27. Added the ${base62d: operator to decode base 62 numbers.
6228 28. dnsdb lookups can now access SRV records.
6230 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6231 the configuration file.
6233 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6234 (-v) mode. This makes the output for a verbose queue run more intelligible.
6236 31. Added a use_postmaster feature to recipient callouts.
6238 32. Added the $body_zerocount variable, containing the number of binary zero
6239 bytes in the message body.
6241 33. The time of last modification of the "new" subdirectory is now used as the
6242 "mailbox time last read" when there is a quota error for a maildir
6245 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6247 35. Added +ignore_unknown as a special item in host lists.
6249 36. Code for decoding IPv6 addresses in host lists is now included, even if
6250 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6251 address was recognized as an IP address, but was then not correctly decoded
6252 into binary, causing unexpected and incorrect effects when compared with
6259 1. Very minor rewording of debugging text in manualroute to say "list of
6260 hosts" instead of "hostlist".
6262 2. If verify=header_syntax was set, and a header line with an unqualified
6263 address (no domain) and a large number of spaces between the end of the
6264 name and the colon was received, the reception process suffered a buffer
6265 overflow, and (when I tested it) crashed. This was caused by some obsolete
6266 code that should have been removed. The fix is to remove it!
6268 3. When running in the test harness, delay a bit after writing a bounce
6269 message to get a bit more predictability in the log output.
6271 4. Added a call to search_tidyup() just before forking a reception process. In
6272 theory, someone could use a lookup in the expansion of smtp_accept_max_
6273 per_host which, without the tidyup, could leave open a database connection.
6275 5. Added the variables $recipient_data and $sender_data which get set from a
6276 lookup success in an ACL "recipients" or "senders" condition, or a router
6277 "senders" option, similar to $domain_data and $local_part_data.
6279 6. Moved the writing of debug_print from before to after the "senders" test
6282 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6283 problems for message scanning, either using a data ACL, or using
6284 local_scan() because the Received: header was not generated till after they
6285 were called (in order to set the time as the time of reception completion).
6286 I have revised the way this works. The header is now generated after the
6287 body is received, but before the ACL or local_scan() are called. After they
6288 are run, the timestamp in the header is updated.
6294 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6295 before starting a queue runner without re-exec. This happened only when
6296 deliver_drop_privilege was set or when the Exim user was set to root. The
6297 effect of the bug was that timeouts during subsequent deliveries caused
6298 crashes instead of being properly handled. The handler is now left at its
6299 default (and expected) setting.
6301 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6302 message, again when deliver_drop_privilege is set or Exim is run as root.
6303 The bug described in (1) was not present in this case, but the tidying up
6304 of the other signals was missing. I have made the two cases consistent.
6306 3. The ignore_target_hosts setting on a manualroute router was being ignored
6307 for hosts that were looked up using the /MX notation.
6309 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6312 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6313 operated on the sender address. After changing the $sender_address to <>
6314 for the sender address verify, Exim was re-instated it as the original
6315 (before rewriting) address, but remembering that it had rewritten it, so it
6316 wasn't rewriting it again. This bug also had the effect of breaking the
6317 sender address verification caching when the sender address was rewritten.
6319 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6320 This has been changed so that if the ip literal address matches
6321 ignore_target_hosts, the router declines.
6323 7. Added expansion conditions match_domain, match_address, and match_local_
6324 part (NOT match_host).
6326 8. The placeholder for the Received: header didn't have a length field set.
6328 9. Added code to Exim itself and to exim_lock to test for a specific race
6329 condition that could lead to file corruption when using MBX delivery. The
6330 issue is with the lockfile that is created in /tmp. If this file is removed
6331 after a process has opened it but before that process has acquired a lock,
6332 there is the potential for a second process to recreate the file and also
6333 acquire a lock. This could lead to two Exim processes writing to the file
6334 at the same time. The added code performs the same test as UW imapd; it
6335 checks after acquiring the lock that its file descriptor still refers to
6336 the same named file.
6338 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6339 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6342 11. Added the smtp_active_hostname option. If used, this will typically be made
6343 to depend on the incoming interface address. Because $interface_address is
6344 not set up until the daemon has forked a reception process, error responses
6345 that can happen earlier (such as "too many connections") no longer contain
6348 12. If an expansion in a condition on a "warn" statement fails because a lookup
6349 defers, the "warn" statement is abandoned, and the next ACL statement is
6350 processed. Previously this caused the whole ACL to be aborted.
6352 13. Added the iplsearch lookup type.
6354 14. Added ident_timeout as a log selector.
6356 15. Added tls_certificate_verified as a log selector.
6358 16. Added a global option tls_require_ciphers (compare the smtp transport
6359 option of the same name). This controls incoming TLS connections.
6361 17. I finally figured out how to make tls_require_ciphers do a similar thing
6362 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6363 before starting the TLS session.
6365 18. Tabs are now shown as \t in -bP output.
6367 19. If the log selector return_path_on_delivery was set, Exim crashed when
6368 bouncing a message because it had too many Received: header lines.
6370 20. If two routers both had headers_remove settings, and the first one included
6371 a superfluous trailing colon, the final name in the first list and the
6372 first name in the second list were incorrectly joined into one item (with a
6373 colon in the middle).
6379 1. Added -C and -D options to the exinext utility, mainly to make it easier
6380 to include in the automated testing, but these could be helpful when
6381 multiple configurations are in use.
6383 2. The exinext utility was not formatting the output nicely when there was
6384 an alternate port involved in the retry record key, nor when there was a
6385 message id as well (for retries that were specific to a specific message
6386 and a specific host). It was also confused by IPv6 addresses, because of
6387 the additional colons they contain. I have fixed the IPv4 problem, and
6388 patched it up to do a reasonable job for IPv6.
6390 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6391 delivery, the log line now contains "pipelined" if PIPELINING was used.
6393 4. An SMTP transport process used to panic and die if the bind() call to set
6394 an explicit outgoing interface failed. This has been changed; it is now
6395 treated in the same way as a connect() failure.
6397 5. A reference to $sender_host_name in the part of a conditional expansion
6398 that was being skipped was still causing a DNS lookup. This no longer
6401 6. The def: expansion condition was not recognizing references to header lines
6402 that used bh_ and bheader_.
6404 7. Added the _cache feature to named lists.
6406 8. The code for checking quota_filecount in the appendfile transport was
6407 allowing one more file than it should have been.
6409 9. For compatibility with Sendmail, the command line option
6417 and sets the incoming protocol and host name (for trusted callers). The
6418 host name and its colon can be omitted when only the protocol is to be set.
6419 Note the Exim already has two private options, -pd and -ps, that refer to
6420 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6421 "s", but I don't think that's a major issue.
6423 10. A number of refactoring changes to the code, none of which should affect
6426 (a) The number of logging options was getting close to filling up the
6427 32-bit word that was used as a bit map. I have split them into two classes:
6428 those that are passed in the argument to log_write(), and those that are
6429 only ever tested independently outside of that function. These are now in
6430 separate 32-bit words, so there is plenty of room for expansion again.
6431 There is no change in the user interface or the logging behaviour.
6433 (b) When building, for example, log lines, the code previously used a
6434 macro that called string_cat() twice, in order to add two strings. This is
6435 not really sufficiently general. Furthermore, there was one instance where
6436 it was actually wrong because one of the argument was used twice, and in
6437 one call a function was used. (As it happened, calling the function twice
6438 did not affect the overall behaviour.) The macro has been replaced by a
6439 function that can join an arbitrary number of extra strings onto a growing
6442 (c) The code for expansion conditions now uses a table and a binary chop
6443 instead of a serial search (which was left over from when there were very
6444 few conditions). Also, it now recognizes conditions like "pam" even when
6445 the relevant support is not compiled in: a suitably worded error message is
6446 given if an attempt is made to use such a condition.
6448 11. Added ${time_interval:xxxxx}.
6450 12. A bug was causing one of the ddress fields not to be passed back correctly
6451 from remote delivery subprocesses. The field in question was not being
6452 subsequently used, so this caused to problems in practice.
6454 13. Added new log selectors queue_time and deliver_time.
6456 14. Might have fixed a bug in maildirsizefile handling that threw up
6457 "unexpected character" debug warnings, and recalculated the data
6458 unnecessarily. In any case, I expanded the warning message to give more
6461 15. Added the message "Restricted characters in address" to the statements in
6462 the default ACL that block characters like @ and % in local parts.
6464 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6465 Three changes have been made:
6467 (a) There was a serious bug; a negative response to MAIL caused the whole
6468 recipient domain to be cached as invalid, thereby blocking all messages
6469 to all local parts at the same domain, from all senders. This bug has
6470 been fixed. The domain is no longer cached after a negative response to
6471 MAIL if the sender used is not empty.
6473 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6476 (c) A new callout option, "use_sender" has been added for people who want
6477 the modified behaviour.
6483 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6486 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6487 indeed breaks things for older releases.
6489 3. Added additional logging to the case where there is a problem reading data
6490 from a filter that is running in a subprocess using a pipe, in order to
6491 try to track down a specific problem.
6493 4. Testing facility fudge: when running in the test harness and attempting
6494 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6495 getting "No route to host". Convert this to a timeout.
6497 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6500 6. Some OS don't have socklen_t but use size_t instead. This affects the
6501 fifth argument of getsockopt() amongst other things. This is now
6502 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6503 can be set for individual OS. I have set it for SunOS5, OSF1, and
6504 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6505 some earlier ones do not.
6507 7. Change 4.30/15 was not doing the test caselessly.
6509 8. The standard form for an IPv6 address literal was being rejected by address
6510 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6511 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6512 this, as well as the form without the "IPv6" on the front (but only when
6513 address literals are enabled, of course).
6515 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6517 10. Exim crashed if a message with an empty sender address specified by -f
6518 encountered a router with an errors_to setting. This could be provoked only
6519 by a command such as
6523 where an empty string was supplied; "<>" did not hit this bug.
6525 11. Installed PCRE release 4.5.
6527 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6528 remained set. It is now erased.
6530 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6531 times from message ids (which are base 36 rather than the normal 62).
6533 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6534 were being counted as actual protocol errors, and logged if the log
6535 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6536 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6537 and DATA following a set of rejected RCPTs do not count as protocol errors.
6538 In other words, Exim assumes they were pipelined, though this may not
6539 actually be the case. Of course, in all cases the client gets an
6540 appropriate error code.
6542 15. If a lookup fails in an ACL condition, a message about the failure may
6543 be available; it is used if testing the ACL cannot continue, because most
6544 such messages specify what the cause of the deferral is. However, some
6545 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6546 that caused an old message to be retained and used if a later statement
6547 caused a defer, replacing the real cause of the deferral.
6549 16. If an IP address had so many PTR records that the DNS lookup buffer
6550 was not large enough to hold them, Exim could crash while trying to process
6551 the truncated data. It now detects and logs this case.
6553 17. Further to 4.21/58, another change has been made: if (and only if) the
6554 first line of a message (the first header line) ends with CRLF, a bare LF
6555 in a subsequent header line has a space inserted after it, so as not to
6556 terminate the header.
6558 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6559 unnecessarily, used atoi() instead of strtol(), and didn't check the
6560 termination when getting file sizes from file names by regex.
6562 19. Completely re-implemented the support for maildirsize files, in the light
6563 of a number of problems with the previous contributed implementation
6564 (4.30/29). In particular:
6566 . If the quota is zero, the maildirsize file is maintained, but no quota is
6569 . If the maildir directory does not exist, it is created before any attempt
6570 to write a maildirsize file.
6572 . The quota value in the file is just a cache; if the quota is changed in
6573 the transport, the new value overrides.
6575 . A regular expression is available for excluding directories from the
6578 20. The autoreply transport checks the characters in options that define the
6579 message's headers; it allows continued headers, but it was checking with
6580 isspace() after an embedded newline instead of explicitly looking for a
6583 21. If all the "regular" hosts to which an address was routed had passed their
6584 expiry times, and had not reached their retry times, the address was
6585 bounced, even if fallback hosts were defined. Now Exim should go on to try
6588 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6589 equivalent code in the SMTP transport. Some hosts send humungous responses
6590 to HELO/EHLO, more than 1024 it seems.
6592 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6593 gives compiler warnings in some environments. I've now done it "properly",
6596 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6597 (because of problems with the built-in one) was declared to return uschar *
6598 instead of char *, causing compiler failure.
6600 25. Fixed a file descriptor leak when processing alias/forward files.
6602 26. Fixed a minor format string issue in dbfn.c.
6604 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6606 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6607 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6610 29. When a sender address is verified, it is cached, to save repeating the test
6611 when there is more than one recipient in a message. However, when the
6612 verification involves a callout, it is possible for different callout
6613 options to be set for different recipients. It is too complicated to keep
6614 track of this in the cache, so now Exim always runs a verification when a
6615 callout is required, relying on the callout cache for the optimization.
6616 The overhead is duplication of the address routing, but this should not be
6619 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6620 to be verified with callout=postmaster, and the main callout worked but the
6621 postmaster check failed, the verification correctly failed. However, if a
6622 subsequent RCPT command asked for sender verification *without* the
6623 postmaster check, incorrect caching caused this verification also to fail,
6626 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6627 it was not caching the DNS options (qualify_single, search_parents) that
6628 were used when the lookup failed. A subsequent lookup with different
6629 options therefore always gave the same answer, though there were cases
6630 where it should not have. (Example: a "domains = !$mx_any" option on a
6631 dnslookup router: the "domains" option is always processed without any
6632 widening, but the router might have qualify_single set.) Now Exim uses the
6633 cached value only when the same options are set.
6635 32. Added John Jetmore's "exipick" utility to the distribution.
6637 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6638 than a timeout (e.g. a certificate is required, and is not provided), an
6639 Exim server now closes the connection immediately. Previously it waited for
6640 the client to close - but if the client is SSL, it seems that they each
6641 wait for each other, leading to a delay before one of them times out.
6643 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6644 maintained 0.8.x compatibility because I don't think many are using it, and
6645 it is clearly obsolete.
6647 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6650 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6651 client certificate was expired. A simple patch fixes this, though I don't
6652 understand the full logic of why the verify callback is called multiple
6655 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6656 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6657 which causes problems with some clients (such as the Certicom SSL Plus
6658 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6659 disables the coutermeasure allowing Eudora to connect."
6661 38. Exim was not checking that a write() to a log file succeeded. This could
6662 lead to Bad Things if a log got too big, in particular if it hit a file
6663 size limit. Exim now panics and dies if it cannot write to a log file, just
6664 as it does if it cannot open a log file.
6666 39. Modified OS/Makefile-Linux so that it now contains
6668 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6670 The two -D definitions ensure that Exim is compiled with large file
6671 support, which makes it possible to handle log files that are bigger than
6674 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6675 instance) a domain was checked against a named list that involved a lookup,
6676 causing $domain_data to be set, then another domain was checked against the
6677 same list, then the first domain was re-checked, the value of $domain_data
6678 after the final check could be wrong. In particular, if the second check
6679 failed, it could be set empty. This bug probably also applied to
6682 41. The strip_trailing_dot option was not being applied to the address given
6683 with the -f command-line option.
6685 42. The code for reading a message's header from the spool was incrementing
6686 $received_count, but never initializing it. This meant that the value was
6687 incorrect (doubled) while delivering a message in the same process in which
6688 it was received. In the most common configuration of Exim, this never
6689 happens - a fresh exec is done - but it can happen when
6690 deliver_drop_privilege is set.
6692 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6693 it now includes up to 150 characters of the unexpected data in the log
6696 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6697 and building data strings. The size of both of these buffers was 10 000
6698 bytes - far larger than anybody would *ever* want, thought I. Needless to
6699 say, somebody hit the limit. I have increased the maximum line length to
6700 20 000 and the maximum data length of concatenated lines to 100 000. I have
6701 also fixed two bugs, because there was no checking on these buffers. Tsk,
6702 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6703 buffer is too small.
6705 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6706 lsearch lookups. Now it does.
6708 46. When parsing a route_list item in a manualroute router, a fixed-length
6709 buffer was used for the list of hosts. I made this 1024 bytes long,
6710 thinking that nobody would ever have a list of hosts that long. Wrong.
6711 Somebody had a whole pile of complicated expansion conditions, and the
6712 string was silently truncated, leading to an expansion error. It turns out
6713 that it is easier to change to an unlimited length (owing to other changes
6714 that have happened since this code was originally written) than to build
6715 structure for giving a limitation error. The length of the item that
6716 expands into the list of hosts is now unlimited.
6718 47. The lsearch lookup could not handle data where the length of text line was
6719 more than 4095 characters. Such lines were truncated, leading to shortened
6720 data being returned. It should now handle lines of any length.
6722 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6723 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6726 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6727 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6728 no longer happens in comment lines. A list of replacements is now placed
6729 at the head of all of the source files, except those whose only change is
6730 to replace PERL_COMMAND in the very first #! line.
6732 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6733 messages on the queue, with a bottom-up merge sort, using code contributed
6734 by Michael Haardt. This should make operations like -bp somewhat faster on
6735 large queues. It won't affect queue runners, except when queue_run_in_order
6738 51. Installed eximstats 1.31 in the distribution.
6740 52. Added support for SRV lookups to the dnslookup router.
6742 53. If an ACL referred to $message_body or $message_body_end, the value was not
6743 reset for any messages that followed in the same SMTP session.
6745 54. The store-handling optimization for building very long strings was not
6746 differentiating between the different store pools. I don't think this
6747 actually made any difference in practice, but I've tidied it.
6749 55. While running the routers to verify a sender address, $sender_address
6750 was still set to the sender address. This is wrong, because when routing to
6751 send a bounce to the sender, it would be empty. Therefore, I have changed
6752 it so that, while verifying a sender address, $sender_address is set to <>.
6753 (There is no change to what happens when verifying a recipient address.)
6755 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6756 target A or AAAA records (if not already returned) without resetting the
6757 qualify_single or search_parents options of the DNS resolver. These are
6758 inappropriate in this case because the targets of MX and SRV records must
6759 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6760 target that, when qualified, matched something in the local domain. These
6761 two options are now turned off when doing these lookups.
6763 57. It seems that at least some releases of Reiserfs (which does not have the
6764 concept of a fixed number of inodes) returns zero and not -1 for the
6765 number of available inodes. This interacted badly with check_spool_inodes,
6766 which assumed that -1 was the "no such thing" setting. What I have done is
6767 to check that the total number of inodes is greater than zero before doing
6768 the test of how many are available.
6770 58. When a "warn" ACL statement has a log_message modifier, the message is
6771 remembered, and not repeated. This is to avoid a lot of repetition when a
6772 message has many recipients that cause the same warning to be written.
6773 However, Exim was preserving the list of already written lines for an
6774 entire SMTP session, which doesn't seem right. The memory is now reset if a
6775 new message is started.
6777 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6778 debugging output unless log_rewrite was also set.
6780 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6781 of (int)(handle) when we know that handle contains (void *)(-1).
6783 61. The Exim daemon panic-logs an error return when it closes the incoming
6784 connection. However "connection reset by peer" seems to be common, and
6785 isn't really an error worthy of noting specially, so that particular error
6788 62. When Exim is trying to find all the local interfaces, it used to panic and
6789 die if the ioctl to get the interface flags failed. However, it seems that
6790 on at least one OS (Solaris 9) it is possible to have an interface that is
6791 included in the list of interfaces, but for which you get a failure error
6792 for this call. This happens when the interface is not "plumbed" into a
6793 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6794 failure of the "get flags" call assumes that the interface is down.
6796 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6797 makes life easier for people who are doing arithmetic on fields extracted
6798 from dates, where you often get leading zeros that should not be
6799 interpreted as octal.
6801 64. Added qualify_domain to the redirect router, to override the global
6804 65. If a pathologically long header line contained very many addresses (the
6805 report of this problem mentioned 10 000) and each of them was rewritten,
6806 Exim could use up a very large amount of memory. (It kept on making new
6807 copies of the header line as it rewrote, and never released the old ones.)
6808 At the expense of a bit more processing, the header rewriting function has
6809 been changed so that it no longer eats memory in this way.
6811 66. The generation of the Received: header has been moved from the time that a
6812 message starts to be received, to the time that it finishes. The timestamp
6813 in the Received: header should now be very close to that of the <= log
6814 line. There are two side-effects of this change:
6816 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6817 logged header lines no longer include the local Received: line, because
6818 it has not yet been created. The same applies to a copy of the message
6819 that is returned to a non-SMTP sender when a message is rejected.
6821 (b) When a filter file is tested using -bf, no additional Received: header
6822 is added to the test message. After some thought, I decided that this
6825 This change does not affect the value of $received_for. It is still set
6826 after address rewriting, but before local_scan() is called.
6828 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6830 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6831 gave an unhelpful panic error message, and a defer error. I have managed to
6832 change this behaviour so that it now rejects any supplied certificate,
6833 which seems right, as the list of acceptable certificates is empty.
6835 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6836 gave an unhelpful defer error. I have not managed to make this reject any
6837 supplied certificates, but the error message it gives is "no certificate
6838 supplied", which is not helpful.
6840 70. exigrep's output now also includes lines that are not associated with any
6841 message, but which match the given pattern. Implemented by a patch from
6842 Martin Sluka, which also tidied up the Perl a bit.
6844 71. Recipient callout verification, like sender verification, was using <> in
6845 the MAIL FROM command. This isn't really the right thing, since the actual
6846 sender may affect whether the remote host accepts the recipient or not. I
6847 have changed it to use the actual sender in the callout; this means that
6848 the cache record is now keyed on a recipient/sender pair, not just the
6849 recipient address. There doesn't seem to be a real danger of callout loops,
6850 since a callout by the remote host to check the sender would use <>.
6851 [SEE ABOVE: changed after hitting problems.]
6853 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6854 temporary errors. However, in the case of such a code being given after
6855 the end of a data transmission (i.e. after ".") Exim was failing to write
6856 a retry record for the message. (Yes, there was some broken host that was
6857 actually sending 8xx at this point.)
6859 73. An unknown lookup type in a host list could cause Exim to panic-die when
6860 the list was checked. (An example that provoked this was putting <; in the
6861 middle of a list instead of at the start.) If this happened during a DATA
6862 ACL check, a -D file could be left lying around. This kind of configuration
6863 error no longer causes Exim to die; instead it causes a defer error. The
6864 incident is still logged to the main and panic logs.
6866 74. Buglet left over from Exim 3 conversion. The message "too many messages
6867 in one connection" was written to the rejectlog but not the mainlog, except
6868 when address rewriting (yes!) was being logged.
6870 75. Added write_rejectlog option.
6872 76. When a system filter was run not as root (that is, when system_filter_user
6873 was set), the values of the $n variables were not being returned to the
6874 main process; thus, they were not subsequently available in the $sn
6877 77. Added +return_path_on_delivery log selector.
6879 78. A connection timeout was being treated differently from recipients deferred
6880 when testing hosts_max_try with a message that was older than the host's
6881 retry timeout. (The host should not be counted, thus allowing all hosts to
6882 be tried at least once before bouncing.) This may have been the cause of an
6883 occasionally reported bug whereby a message would remain on the queue
6884 longer than the retry timeout, but would be bounced if a delivery was
6885 forced. I say "may" because I never totally pinned down the problem;
6886 setting up timeout/retry tests is difficult. See also the next item.
6888 79. The ultimate address timeout was not being applied to errors that involved
6889 a combination of host plus message (for example, a timeout on a MAIL
6890 command). When an address resolved to a number of possible hosts, and they
6891 were not all tried for each delivery (e.g. because of hosts_max_try), a
6892 message could remain on the queue longer than the retry timeout.
6894 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6897 81. Fixed an obscure SMTP outgoing bug which required at least the following
6898 conditions: (a) there was another message waiting for the same server;
6899 (b) the server returned 5xx to all RCPT commands in the first message so
6900 that the message was not completed; (c) the server dropped the connection
6901 or gave a negative response to the RSET that Exim sends to abort the
6902 transaction. The observed case was a dropped connection after DATA that had
6903 been sent in pipelining mode. That is, the server had advertised PIPELINING
6904 but was not implementing it correctly. The effect of the bug was incorrect
6905 behaviour, such as trying another host, and this could lead to a crash.
6911 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6912 and daemon.c were passed as pointers to ints; they should have been
6913 pointers to socklen_t variables (which are typically unsigned ints).
6915 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6918 3. Fixed a really odd bug that affected only the testing scheme; patching a
6919 certain fixed string in the binary changed the value of another string that
6920 happened to be identical to the end of the original first string.
6922 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6923 name", it returns that address as the IP address. On some operating
6924 systems (e.g. Solaris), it also passes back the IP address string as the
6925 "host name". However, on others (e.g. Linux), it passes back an empty
6926 string. Exim wasn't checking for this, and was changing the host name to an
6927 empty string, assuming it had been canonicalized.
6929 5. Although rare, it is permitted to have more than one PTR record for a given
6930 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6931 all the names associated with an address, because they do in Solaris.
6932 However, it seems that they do not in Linux for data that comes from the
6933 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6934 I found this out when I moved to a new Linux workstation and tried to run
6935 the Exim test suite.
6937 To get round this problem I have changed the code so that it now does its
6938 own call to the DNS to look up PTR records when searching for a host name.
6939 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6940 addresses that are only in /etc/hosts are still found.
6942 This behaviour is, however, controlled by an option called host_lookup_
6943 order, which defaults to "bydns:byaddr". If people want to use the other
6944 order, or indeed, just use one or the other means of lookup, they can
6945 specify it in this variable.
6947 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6948 some operating systems, this comes back from gethostbyaddr() as an empty
6949 string, and this is what Exim used to test for. However, it seems that in
6950 other systems, "." is yielded. Exim now tests for this case too.
6952 7. The values of check_spool_space and check_log_space are now held internally
6953 as a number of kilobytes instead of an absolute number of bytes. If a
6954 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6955 kilobyte. This means that much larger values can be stored.
6957 8. Exim monitor: an attempt to get the action menu when not actually pointing
6958 at a message produces an empty menu entitled "No message selected". This
6959 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6960 no entries in it ("Shell widget menu has zero width and/or height"). So I
6961 have added a single, blank menu entry in this case.
6963 9. Added ${quote_local_part.
6965 10. MIME decoding is now applied to the contents of Subject: header lines when
6968 11. Now that a reference to $sender_host_address automatically causes a reverse
6969 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6970 host lookup before query-style lookups in lists that might use this
6971 variable. This has therefore been abolished, and the "net-" prefix is no
6972 longer necessary for query-style lookups.
6974 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6975 have been a typo for LFLAGS, so it has been changed.
6977 13. The install script calls Exim with "-C /dev/null" in order to find the
6978 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6979 to be output. However, since Exim outputs its version number before the
6980 error, it didn't break the script. It just looked ugly. I fixed this by
6981 always allowing "-C /dev/null" if the caller is root.
6983 14. Ignore overlarge ACL variable number when reading spool file - insurance
6984 against a later release with more variables having written the file.
6986 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6987 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6988 this, as well as the form without the "IPv6" on the front.
6990 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6991 OS/Makefile-Darwin file.
6993 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6994 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6996 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6997 variable. However, some OS use ints for inodes. I've added cast to long int
6998 to get rid of the compiler warning.
7000 19. I had forgotten to lock out "/../" in configuration file names when
7001 ALT_CONFIG_PREFIX was set.
7003 20. Routers used for verification do not need to specify transports. However,
7004 if such a router generated a host list, and callout was configured, Exim
7005 crashed, because it could not find a port number from the (non-existent)
7006 transport. It now assumes port 25 in this circumstance.
7008 21. Added the -t option to exigrep.
7010 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7011 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7012 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7013 them is set, LOOKUP_LSEARCH is forced.
7015 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7017 24. Added sender and host information to the "rejected by local_scan()" log
7018 line; previously there was no indication of these.
7020 25. Added .include_if_exists.
7022 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7023 Linux. It turns out that not all file systems support this. Apparently some
7024 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7025 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7026 not supported on the file descriptor, is now ignored when Exim is trying to
7027 sync a directory. This applies only to Linux.
7029 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7031 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7032 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7035 29. Added support for maildirsize files from supplied patch (modified a bit).
7037 30. The use of :fail: followed by an empty string could lead Exim to respond to
7038 sender verification failures with (e.g.):
7040 550 Verification failed for <xxx>
7041 550 Sender verify failed
7043 where the first response line was missing the '-' that indicates it is not
7044 the final line of the response.
7046 31. The loop for finding the name of the user that called Exim had a hardwired
7047 limit of 10; it now uses the value of finduser_retries, which is used for
7048 all other user lookups.
7050 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7053 33. Exim was neglecting to zero errno before one call of strtol() when
7054 expanding a string and expecting an integer value. On some systems this
7055 resulted in spurious "integer overflow" errors. Also, it was casting the
7056 result into an int without checking.
7058 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7059 did not work. The code looks as if it has *never* worked, though it appears
7060 to have been documented since at least release 1.62. I have made it work.
7062 35. The "timeout_DNS" error in retry rules, also documented since at least
7063 1.62, also never worked. As it isn't clear exactly what this means, and
7064 clearly it isn't a major issue, I have abolished the feature by treating it
7065 as "timeout", and writing a warning to the main and panic logs.
7067 36. The display of retry rules for -brt wasn't always showing the error code
7070 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7071 timeout_connect_A, timeout_connect_MX.
7073 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7074 to the empty sender.
7076 39. The daemon was not analysing the content of -oX till after it had closed
7077 stderr and disconnected from the controlling terminal. This meant that any
7078 syntax errors were only noted on the panic log, and the return code from
7079 the command was 0. By re-arranging the code a little, I've made the
7080 decoding happen first, so such errors now appear on stderr, and the return
7081 code is 1. However, the actual setting up of the sockets still happens in
7082 the disconnected process, so errors there are still only recorded on the
7085 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7086 connections (as happens on some IP stacks) was logged at start up time as
7087 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7088 it from "IPv6 and IPv4", which means that two separate sockets are being
7091 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7092 says whether AF_INET or AF_INET6 was passed as an argument.
7094 42. Exiwhat output was messed up when time zones were included in log
7097 43. Exiwhat now gives more information about the daemon's listening ports,
7098 and whether -tls-on-connect was used.
7100 44. The "port" option of the smtp transport is now expanded.
7102 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7103 silently ignored. Now an error message is written to the main and panic
7106 46. There's a new ACL modifier called "logwrite" which writes to a log file
7107 as soon as it is encountered.
7109 47. Added $local_user_uid and $local_user_gid at routing time.
7111 48. Exim crashed when trying to verify a sender address that was being
7114 49. Exim was recognizing only a space character after ".include". It now also
7115 recognizes a tab character.
7117 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7118 extracting the relevant information from the specification. The man page no
7119 longer contains scrambled data for the -d option, and I've added a section
7120 at the front about calling Exim under different names.
7122 51. Added "extra_headers" argument to the "mail" command in filter files.
7124 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7127 53. Installed eximstats 1.29.
7129 54. Added transport_filter_timeout as a generic transport option.
7131 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7132 Cc: header lines. This was required by RFC 822, but it not required by RFC
7135 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7136 incoming messages that did not have them. Now it does so only if the
7137 message originates locally, that is, if there is no associated remote host
7138 address. When Resent- header lines are present, this applies to the Resent-
7139 lines rather than the non-Resent- lines.
7141 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7142 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7144 58. Messages for configuration errors now include the name of the main
7145 configuration file - useful now that there may be more than one file in a
7146 list (.included file names were always shown).
7148 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7149 for those rare installations that do not start the daemon as root or run it
7150 setuid root. I've cut out the call to initgroups() if the daemon is not
7153 60. The Exim user and group can now be bound into the binary as text strings
7154 that are looked up at the start of Exim's processing.
7156 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7158 62. Added $mailstore_basename variable.
7160 63. Installed patch to sieve.c from Michael Haardt.
7162 64. When Exim failed to open the panic log after failing to open the main log,
7163 the original message it was trying to log was written to stderr and debug
7164 output, but if they were not available (the usual case in production), it
7165 was lost. Now it is written to syslog before the two lines that record the
7166 failures to open the logs.
7168 65. Users' Exim filters run in subprocesses under the user's uid. It is
7169 possible for a "deliver" command or an alias in a "personal" command to
7170 provoke an address rewrite. If logging of address rewriting is configured,
7171 this fails because the process is not running as root or exim. There may be
7172 a better way of dealing with this, but for the moment (because 4.30 needs
7173 to be released), I have disabled address rewrite logging when running a
7174 filter in a non-root, non-exim process.
7180 1. The buildconfig auxiliary program wasn't quoting the value set for
7181 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7182 not defined. This bug was masked in 4.22 by the effect that was fixed in
7185 2. Some messages that were rejected after a message id was allocated were
7186 shown as "incomplete" by exigrep. It no longer does this for messages that
7187 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7189 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7190 have allow_domain_literals set, the ID did not get logged in the <= line.
7191 Domain literals are now always recognized in Message-ID: header lines.
7193 4. The first argument for a ${extract expansion item is the key name or field
7194 number. Leading and trailing spaces in this item were not being ignored,
7195 causing some misleading effects.
7197 5. When deliver_drop_privilege was set, single queue runner processes started
7198 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7199 same command in the process it spins off) were not dropping privilege.
7201 6. When the daemon running as "exim" started a queue runner, it always
7202 re-executed Exim in the spun-off process. This is a waste of effort when
7203 deliver_drop_privilege is set. The new process now just calls the
7204 queue-runner function directly.
7210 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7213 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7214 ignored. Though the use of -oP was forcing the writing of a pid file, it
7215 was always written to the default place.
7217 3. If the message "no IP address found for host xxxx" is generated during
7218 incoming verification, it is now followed by identification of the incoming
7219 connection (so you can more easily find what provoked it).
7221 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7223 5. Added some features to "harden" Exim a bit more against certain attacks:
7225 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7226 be put in Local/Makefile. This is like the never_users runtime option,
7227 but it cannot be overridden. The default setting is "root".
7229 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7230 prefix string with which any file named in a -C command line option
7233 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7234 is retained for -C and -D only if the caller of Exim is root. Without
7235 it, the exim user may also use -C and -D and retain privilege.
7237 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7238 command line option is disabled.
7240 6. Macro names set by the -D option must start with an upper case letter, just
7241 like macro names defined in the configuration file.
7243 7. Added "dereference=" facility to LDAP.
7245 8. Two instances of the typo "uknown" in the source files are fixed.
7247 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7248 the Configure-Makefile script screwed up while processing it.
7250 10. Incorporated PCRE 4.4.
7252 11. The SMTP synchronization check was not operating right at the start of an
7253 SMTP session. For example, it could not catch a HELO sent before the client
7254 waited for the greeting. There is now a check for outstanding input at the
7255 point when the greeting is written. Because of the duplex, asynchronous
7256 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7257 way, but not yet received, when the check is performed.
7259 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7260 on TCP/IP sockets, because this apparently causes some broken clients to
7263 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7264 unchanged) from the Cygwin maintainer.
7266 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7267 was supported instead of testing for mbx. Effectively a typo.
7269 15. The spa authenticator server code was not checking that the input it
7270 received was valid base64.
7272 16. The debug output line for the "set" modifier in ACLs was not showing the
7273 name of the variable that was being set.
7275 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7277 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7278 lookup on its own. Something else was needed to trigger the lookup. For
7279 example, a match in host_lookup or the need for a host name in a host list.
7280 Now, if $sender_host_name is referenced and the host name has not yet been
7281 looked up, a lookup is performed. If the lookup fails, the variable remains
7282 empty, and $host_lookup_failed is set to "1".
7284 19. Added "eqi" as a case-independent comparison operator.
7286 20. The saslauthd authentication condition could segfault if neither service
7287 nor realm was specified.
7289 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7290 error message that was logged was misleading, and incoming SMTP
7291 connections were dropped. The message is now more accurate, and temporary
7292 errors are given to SMTP connections.
7294 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7295 (except RSET) with a 421 error, until QUIT is received. However, it was
7296 failing to send a response to QUIT.
7298 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7299 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7300 ACL is now run after the helo_try_verify_hosts code.
7302 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7303 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7304 case-independent, so other case variants are also recognized). Apparently
7305 some systems use these upper case variants.
7307 25. If more than two messages were waiting for the same host, and a transport
7308 filter was specified for the transport, Exim sent two messages over the
7309 same TCP/IP connection, and then failed with "socket operation on non-
7310 socket" when it tried to send the third.
7312 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7314 27. The extern definition of crypt16() in expand.c was not being excluded when
7315 the OS had its own crypt16() function.
7317 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7318 as a preferred synonym for return_size_limit, both as an option and as an
7321 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7323 30. Changed the default configuration ACL to relax the local part checking rule
7324 for addresses that are not in any local domains. For these addresses,
7325 slashes and pipe symbols are allowed within local parts, but the sequence
7326 /../ is explicitly forbidden.
7328 31. SPA server authentication was not clearing the challenge buffer before
7331 32. log_message in a "warn" ACL statement was writing to the reject log as
7332 well as to the main log, which contradicts the documentation and doesn't
7333 seem right (because no rejection is happening). So I have stopped it.
7335 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7336 However, I am unable to do any testing of this.
7338 34. Fixed an infelicity in the appendfile transport. When checking directories
7339 for a mailbox, to see if any needed to be created, it was accidentally
7340 using path names with one or more superfluous leading slashes; tracing
7341 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7343 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7344 contents are added to the log line that is written for every discarded
7345 recipient. (Previously a log_message setting was ignored.)
7347 36. The ${quote: operator now quotes the string if it is empty.
7349 37. The install script runs exim in order to find its version number. If for
7350 some reason other than non-existence or emptiness, which it checks, it
7351 could not run './exim', it was installing it with an empty version number,
7352 i.e. as "exim-". This error state is now caught, and the installation is
7355 38. An argument was missing from the function that creates an error message
7356 when Exim fails to connect to the socket for saslauthd authentication.
7357 This could cause Exim to crash, or give a corrupted message.
7359 39. Added isip, isip4, and isip6 to ${if conditions.
7361 40. The ACL variables $acl_xx are now saved with the message, and can be
7362 accessed later in routers, transports, and filters.
7364 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7365 strings in the file are not string-expanded.
7367 42. If a MAIL command specified a SIZE value that was too large to fit into an
7368 int variable, the check against message_size_limit failed. Such values are
7369 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7370 day this will have to be increased, but I don't think I want to be around
7371 when emails are that large.
7378 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7379 iconv() is not standard in FreeBSD.
7381 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7382 IPv6 enabled. The observed symptom was a segmentation fault on return from
7383 the function os_common_find_running_interfaces() in src/os.c.
7385 3. In the check_special_case() function in daemon.c I had used "errno" as an
7386 argument name, which causes warnings on some systems. This was basically a
7387 typo, since it was named "eno" in the comments!
7389 4. The code that waits for the clock to tick (at a resolution of some fraction
7390 of a second) so as to ensure message-id uniqueness was always waiting for
7391 at least one whole tick, when it could have waited for less. [This is
7392 almost certainly not relevant at current processor speeds, where it is
7393 unlikely to ever wait at all. But we try to future-proof.]
7395 5. The function that sleeps for a time interval that includes fractions of a
7396 second contained a race. It did not block SIGALRM between setting the
7397 timer, and suspending (a couple of lines later). If the interval was short
7398 and the sigsuspend() was delayed until after it had expired, the suspension
7399 never ended. On busy systems this could lead to processes getting stuck for
7402 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7403 process, before it forks any delivery processes. The open lookup caching
7404 mechanism meant that the open file or database connection was passed into
7405 the delivery process. The problem was that delivery processes always tidy
7406 up cached lookup data. This could cause a problem for the next delivery
7407 process started by the queue runner, because the external queue runner
7408 process does not know about the closure. So the next delivery process
7409 still has data in the lookup cache. In the case of a file lookup, there was
7410 no problem because closing a file descriptor in a subprocess doesn't affect
7411 the parent. However, if the lookup was caching a connection to a database,
7412 the connection was closed, and the second delivery process was likely to
7413 see errors such as "PGSQL: query failed: server closed the connection
7414 unexpectedly". The problem has been fixed by closing all cached lookups
7415 in a queue runner before running a delivery process.
7417 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7418 seem to have the "const" qualifier which it has on other OS. I've
7421 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7422 *of the same type* (client or server) with the same public name that an
7423 error should be diagnosed.
7425 9. When Exim looked up a host name for an IP address, but failed to find the
7426 original IP address when looking up the host name (a safety check), it
7427 output the message "<ip address> does not match any IP for NULL", which was
7428 confusing, to say the least. The bug was that the host name should have
7429 appeared instead of "NULL".
7431 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7432 user that is built into the binary, and the -C or -D options is used, root
7433 privilege is dropped before the configuration file is read. In addition,
7434 logging is switched to stderr instead of the normal log files. If the
7435 configuration then re-defines the Exim user, the unprivileged environment
7436 is probably not what is expected, so Exim logs a panic warning message (but
7439 However, if deliver_drop_privilege is set, the unprivileged state may well
7440 be exactly what is intended, so the warning has been cut out in that case,
7441 and Exim is allowed to try to write to its normal log files.
7447 1. smtp_return_error_details was not giving details for temporary sender
7448 or receiver verification errors.
7450 2. Diagnose a configuration error if two authenticators have the same public
7453 3. Exim used not to create the message log file for a message until the first
7454 delivery attempt. This could be confusing when incoming messages were held
7455 for policy or load reasons. The message log file is now created at the time
7456 the message is received, and an initial "Received" line is written to it.
7458 4. The automatically generated man page for command line options had a minor
7459 bug that caused no ill effects; however, a more serious problem was that
7460 the procedure for building the man page automatically didn't always
7461 operate. Consequently, release 4.20 contains an out-of-date version. This
7462 shouldn't happen again.
7464 5. When building Exim with embedded Perl support, the script that builds the
7465 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7466 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7468 6. The freeze_tell option was not being used for messages that were frozen on
7469 arrival, either by an ACL or by local_scan().
7471 7. Added the smtp_incomplete_transaction log selector.
7473 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7474 was accepting AUTH without a new EHLO.
7476 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7477 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7480 10. Logging of TCP/IP connections (when configured) now happens in the main
7481 daemon process instead of the child process, so that the TCP/IP connection
7482 count is more accurate (but it can never be perfect).
7484 11. The use of "drop" in a nested ACL was not being handled correctly in the
7485 outer ACL. Now, if condition failure induced by the nested "drop" causes
7486 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7487 or "require"), the connection is dropped.
7489 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7490 that yield "discard" can now be used with an "accept" or a "discard" verb,
7491 but an error is generated for any others (because I can't see a useful way
7492 to define what should happen).
7494 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7495 are now processed in the same way as lines in the Exim configuration file.
7496 In particular, continuation lines are supported.
7498 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7500 15. Added -ti meaning -t -i.
7502 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7503 domains, and warn by logging if others are found.
7505 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7506 returned from GIFCONF when Exim is trying to find the list of interfaces on
7507 a host. The code in os.c has been modified to copy each ifreq to an aligned
7508 structure in all cases.
7510 Also, in some cases, the returned ifreq's were being copied to a 'struct
7511 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7512 means the last couple of bytes of an IPv6 address could be chopped if the
7513 ifreq contained only a normal sockaddr (14 bytes storage).
7515 18. Named domain lists were not supported in the hosts_treat_as_local option.
7516 An entry such as +xxxx was not recognized, and was treated as a literal
7519 19. Ensure that header lines added by a DATA ACL are included in the reject log
7520 if the ACL subsequently rejects the message.
7522 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7523 MD5 (which is deprecated).
7525 21. When testing a filter file using -bf, Exim was writing a message when it
7526 took the sender from a "From " line in the message, but it was not doing so
7527 when it took $return_path from a Return-Path: header line. It now does.
7529 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7530 with a valid header line field name (a series of printing characters
7531 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7533 23. Changed "disc" in the source to "disk" to conform to the documentation and
7534 the book and for uniformity.
7536 24. Ignore Sendmail's -Ooption=value command line item.
7538 25. When execve() failed while trying to run a command in a pipe transport,
7539 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7540 could be confused with a return value of 69 from the command itself. This
7541 has been changed to 127, the value the shell returns if it is asked to run
7542 a non-existent command. The wording for the related log line suggests a
7543 non-existent command as the problem.
7545 26. If received_header_text expands to an empty string, do not add a Received:
7546 header line to the message. (Well, it adds a token one on the spool, but
7547 marks it "old" so that it doesn't get used or transmitted.)
7549 27. Installed eximstats 1.28 (addition of -nt option).
7551 28. There was no check for failure on the call to getsockname() in the daemon
7552 code. This can fail if there is a shortage of resources on the system, with
7553 ENOMEM, for example. A temporary error is now given on failure.
7555 29. Contrary to the C standard, it seems that in some environments, the
7556 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7557 program. Exim now does this explicitly; it affects the formatting of
7558 timestamps using strftime().
7560 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7561 complaints. I've now initialized all the variables, to avoid this.
7563 32. Header lines added by a system filter were not being "seen" during
7564 transport-time rewrites.
7566 33. The info_callback() function passed to OpenSSL is set up with type void
7567 (*)(SSL *, int, int), as described somewhere. However, when calling the
7568 function (actually a macro) that sets it up, the type void(*)() is
7569 expected. I've put in a cast to prevent warnings from picky compilers.
7571 34. If a DNS black list lookup found a CNAME record, but there were no A
7572 records associated with the domain it pointed at, Exim crashed.
7574 35. If a DNS black list lookup returned more than one A record, Exim ignored
7575 all but the first. It now scans all returned addresses if a particular IP
7576 value is being sought. In this situation, the contents of the
7577 $dnslist_value variable are a list of all the addresses, separated by a
7580 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7581 to accept a host name and all its aliases if the forward lookup for any of
7582 them yielded the IP address of the incoming connection. Now it accepts only
7583 those names whose forward lookup yields the correct IP address. Any other
7584 names are discarded. This closes a loophole whereby a rogue DNS
7585 administrator could create reverse DNS records to break through a
7586 wildcarded host restriction in an ACL.
7588 37. If a user filter or a system filter that ran in a subprocess used any of
7589 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7590 the wrong values were passed to the pipe command ($thisaddress had the
7591 value of $0, $0 had the value of $1, etc). This bug was introduced by
7592 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7594 38. Improved the line breaking for long SMTP error messages from ACLs.
7595 Previously, if there was no break point between 40 and 75 characters, Exim
7596 left the rest of the message alone. Two changes have been made: (a) I've
7597 reduced the minimum length to 35 characters; (b) if it can't find a break
7598 point between 35 and 75 characters, it looks ahead and uses the first one
7599 that it finds. This may give the occasional overlong line, but at least the
7600 remaining text gets split now.
7602 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7603 file descriptors might be low, and that setting 1000 would always raise it.
7604 It turns out that in some environments, the limit is already over 1000 and
7605 that lowering it causes trouble. So now Exim takes care not to decrease it.
7607 40. When delivering a message, the value of $return_path is set to $sender_
7608 address at the start of routing (routers may change the value). By an
7609 oversight, this default was not being set up when an address was tested by
7610 -bt or -bv, which affected the outcome if any router or filter referred to
7613 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7614 log only when "message" or "log_message" are set. However, if one of the
7615 conditions was an address verification, or a call to a nested ACL, the
7616 messages generated by the underlying test were being passed through. This
7617 no longer happens. The underlying message is available in $acl_verify_
7618 message for both "message" and "log_message" expansions, so it can be
7619 passed through if needed.
7621 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7622 new expansion $bh_ to give the encoded byte string without charset
7623 translation. Translation happens only if iconv() is available; HAVE_ICONV
7624 indicates this at build time. HEADERS_CHARSET gives the charset to
7625 translate to; headers_charset can change it in the configuration, and
7626 "headers charset" can change it in an individual filter file.
7628 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7629 that creates RFC 2047 encoded "words" labels them as that charset instead
7630 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7631 expansion operator; (ii) when Exim creates a From: line for a local
7632 message; (iii) when a header line is rewritten to include a "phrase" part.
7634 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7635 buggy, causing it to skip the first lines of messages whose message ID
7636 ended in 'D'. This would not have bitten before Exim release 4.14, because
7637 message IDs were unlikely to end in 'D' before then. The effect was to have
7638 incorrect size information for certain domains.
7640 45. #include "config.h" was missing at the start of the crypt16.c module. This
7641 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7644 46. If there was a timeout during a "random" callout check, Exim treated it as
7645 a failure of the random address, and carried on sending RSET and the real
7646 address. If the delay was just some slowness somewhere, the response to the
7647 original RCPT would be taken as a response to RSET and so on, causing
7648 mayhem of various kinds.
7650 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7651 when I implemented it. It didn't allow for the fact that some option values
7652 may legitimately be negative (e.g. size_addition), and it didn't even do
7653 the right test for positive values.
7655 48. Domain names in DNS records are case-independent. Exim always looks them up
7656 in lower case. Some resolvers return domain names in exactly the case they
7657 appear in the zone file, that is, they may contain uppercase letters. Not
7658 all resolvers do this - some return always lower case. Exim was treating a
7659 change of case by a resolver as a change of domain, similar to a widening
7660 of a domain abbreviation. This triggered its re-routing code and so it was
7661 trying to route what was effectively the same domain again. This normally
7662 caused routing to fail (because the router wouldn't handle the domain
7663 twice). Now Exim checks for this case specially, and just changes the
7664 casing of the domain that it ultimately uses when it transmits the message
7667 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7670 50. If a filter generated a file delivery with a non-absolute name (possible if
7671 no home directory exists for the router), the forbid_file option was not
7674 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7675 the existing equality matching.
7677 52. Exim was using ints instead of ino_t variables in some places where it was
7678 dealing with inode numbers.
7680 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7681 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7682 called TMPDIR, and if it finds it is different, it changes its value.
7684 54. The smtp_printf() function is now made available to local_scan() so
7685 additional output lines can be written before returning. There is also an
7686 smtp_fflush() function to enable the detection of a dropped connection.
7687 The variables smtp_input and smtp_batched_input are exported to
7690 55. Changed the default runtime configuration: the message "Unknown user"
7691 has been removed from the ACL, and instead placed on the localuser router,
7692 using the cannot_route_message feature. This means that any verification
7693 failures that generate their own messages won't get overridden. Similarly,
7694 the "Unrouteable address" message that was in the ACL for unverifiable
7695 relay addresses has also been removed.
7697 56. Added hosts_avoid_esmtp to the smtp transport.
7699 57. The exicyclog script was not checking for the esoteric option
7700 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7701 will work only if exicyclog is run under the appropriate euid.
7703 58. Following a discussion on the list, the rules by which Exim recognises line
7704 endings on incoming messages have been changed. The -dropcr and drop_cr
7705 options are now no-ops, retained only for backwards compatibility. The
7706 following line terminators are recognized: LF CRLF CR. However, special
7707 processing applies to CR:
7709 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7710 nor a local message in the state where . is a terminator.
7712 (ii) If a bare CR is encountered in a header line, an extra space is added
7713 after the line terminator so as not to end the header. The reasoning
7714 behind this is that bare CRs in header lines are most likely either
7715 to be mistakes, or people trying to play silly games.
7717 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7718 was being incorrectly given as 18 bytes larger than it should have been.
7719 This is a VOB (very old bug).
7721 60. This may never have affected anything current, but just in case it has:
7722 When the local host is found other than at the start of a list of hosts,
7723 the local host, those with the same MX, and any that follow, are discarded.
7724 When the list in question was part of a longer list of hosts, the following
7725 hosts (not currently being processed) were also being discarded. This no
7726 longer happens. I'm not sure if this situation could ever has previously
7729 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7732 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7733 header. This is something that is recommended in a new Internet Draft, and
7734 is something that is documented as being done by Sendmail. There are two
7735 possible values. For messages generated by the autoreply transport, Exim
7738 Auto-Submitted: auto-replied
7740 whereas for all other generated messages (e.g. bounces) it adds
7742 Auto-Submitted: auto-generated
7744 63. The "personal" condition in filters now includes a test for the
7745 Auto-Submitted: header. If it contains the string "auto-" the message it
7746 not considered personal.
7748 64. Added rcpt_include_affixes as a generic transport option.
7750 65. Added queue_only_override (default true).
7752 66. Added the syslog_duplication option.
7754 67. If what should have been the first header line of a message consisted of
7755 a space followed by a colon, Exim was mis-interpreting it as a header line.
7756 It isn't of course - it is syntactically invalid and should therefore be
7757 treated as the start of the message body. The misbehaviour could have
7758 caused a number of strange effects, including loss of data in subsequent
7759 header lines, and spool format errors.
7761 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7762 client host had authenticated. This control can now be exercised by an ACL
7763 for more flexibility.
7765 69. By default, callouts do not happen when testing with -bh. There is now a
7766 variant, -bhc, which does actually run the callout code, including
7767 consulting and updating the callout cache.
7769 70. Added support for saslauthd authentication, courtesy of Alexander
7772 71. If statvfs() failed on the spool or log directories while checking their
7773 size for availability, Exim confusingly gave the error "space shortage".
7774 Furthermore, in debugging mode it crashed with a floating point exception.
7775 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7776 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7777 serious problem, Exim now writes to the main and panic logs when this
7778 happens, with details of the failure. It then refuses to accept the
7779 incoming message, giving the message "spool directory problem" or "log
7780 directory problem" with a 421 code for SMTP messages.
7782 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7783 0, 1, and 2 exist, because some OS complain for execs without them (see
7784 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7785 descriptors. However, the code omitted to check that the open succeeded,
7786 causing mysterious errors if for some reason the permissions on /dev/null
7787 got screwed. Now Exim writes a message to the main and panic logs, and
7788 bombs out if it can't open /dev/null.
7790 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7791 interact so that it is all more flexible. It is supposed to remain
7792 backwards compatible. Also added extra_local_interfaces.
7794 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7795 to bomb out with an assertion failure - to the client this appears as a
7796 connection drop. This problem occurs in the part of the code that was taken
7797 from the Samba project. Fortunately, the assertion is in a very simple
7798 function, so I have fixed this by reproducing the function inline in the
7799 one place where it is called, and arranging for authentication to fail
7800 instead of killing the process with assert().
7802 75. The SPA client code was not working when the server requested OEM rather
7803 than Unicode encoding.
7805 76. Added code to make require_files with a specific uid setting more usable in
7806 the case where statting the file as root fails - usually a non-root-mounted
7807 NFS file system. When this happens and the failure is EACCES, Exim now
7808 forks a subprocess and does the per-uid checking as the relevant uid.
7810 77. Added process_log_path.
7812 78. If log_file_path was not explicitly set, a setting of check_log_space or
7813 check_log_inodes was ignored.
7815 79. If a space check for the spool or log partitions fails, the incident is now
7816 logged. Of course, in the latter case the data may get lost...
7818 80. Added the %p formatting code to string_format() so that it can be used to
7819 print addresses in debug_print(). Adjusted all the address printing in the
7820 debugging in store.c to use %p rather than %d.
7822 81. There was a concern that a line of code in smtp_in.c could overflow a
7823 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7824 initially expressed, the concern was not well-founded, because trailing
7825 spaces are removed early. However, if the trailing spaces were followed by
7826 a NULL, they did not get removed, so the overflow was possible. Two fixes
7829 (a) I re-wrote the offending code in a cleaner fashion.
7830 (b) If an incoming SMTP command contains a NULL character, it is rejected
7833 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7834 runs initgroups(), so that if the Exim user is in any additional groups,
7835 they will be used during message reception.
7841 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob