1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
66 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
67 excluded, not matching the documentation.
69 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
70 was given for the sqlite_dbfile a trap resulted.
76 JH/01 Avoid costly startup code when not strictly needed. This reduces time
77 for some exim process initialisations. It does mean that the logging
78 of TLS configuration problems is only done for the daemon startup.
80 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
82 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
83 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
86 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
87 DKIM signing is being done. Previously a transport_filter would always
88 disable CHUNKING, falling back to traditional DATA.
90 JH/05 Regard command-line receipients as tainted.
92 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
94 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
95 PAM library frees one of the arguments given to it, despite the
96 documentation. Therefore a plain malloc must be used.
98 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
99 on-stack buffers were used, resulting in a taint trap when DSN information
100 copied from a received message was written into the buffer.
102 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
103 the ordering of its ARC headers. This caused a crash.
105 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
106 a new record was being constructed with information from the peer, a trap
109 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
110 installation would get error messages from DMARC verify, when it hit the
111 nonexistent file indicated by the default. Distros wanting DMARC enabled
112 should both provide the file and set the option.
113 Also enforce no DMARC verification for command-line sourced messages.
115 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
116 could, depending on the platform, hang at the STARTTLS response.
118 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
119 message on a connection. Previously if one message had ARC headers and
120 the following one did not, a crash could result when adding an
121 Authentication-Results: header.
123 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
124 Exim main code and Exim-related utities. The introduction of taint
125 tracking also did many adjustments to string handling. Since then, eximon
126 frequently terminated with an assert failure.
128 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
129 check for 452 responses. This slightly helps the inefficieny of doing
130 a large alias-expansion into a recipient-limited target. The max_rcpt
131 transport option still applies (and at the current default, will override
132 the new feature). The check is done for either cause of synch, and forces
133 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
134 connection. The new facility is not tunable at this time.
136 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
137 library live data was being used, so the results became garbage. Make
138 copies while it is still usable.
140 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
141 on delivery deferred (==) and failed (**) lines (if a delivery was
142 attemtped). Previously it was only on completion (=>) lines.
144 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
145 for the expansion of the server_scram_iter and server_scram_salt options.
147 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
148 are now specifically given a NO_DATA response without hitting the system
149 resolver. The library goes on to do the now-standard TXT lookup.
150 Use of dnsdb lookups is not affected.
152 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
153 only retrieve the errormessage once. Previously two calls to dlerror()
154 were used, and the second one (for mainlog/paniclog) retrieved null
157 JH/20 Taint checking: disallow use of tainted data for
158 - the appendfile transport file and directory options
159 - the pipe transport command
160 - the autoreply transport file, log and once options
161 - file names used by the redirect router (including filter files)
163 - paths used by single-key lookups
164 Previously this was permitted.
166 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
167 adjusted the size of a major service buffer; this failed because the
168 buffer was in use at the time. Change to a compile-time increase in the
169 buffer size, when this authenticator is compiled into exim.
171 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
172 previous fast-mode was untenable in the face of glibs using mmap to
173 support larger malloc requests.
175 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
176 New values supported, if defined on system where compiled:
177 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
178 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
180 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
181 running a limited number of proceses in parallel, a benefit is gained. The
182 amount varies with the platform hardware and load. The use of the option
183 queue_run_in_order means we cannot do this, as ordering becomes
186 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
187 had introduced a string-copy (for ensuring NUL-termination) which was not
188 appropriate for that case, which can include embedded NUL bytes in the
189 block of data. Investigation showed the copy to actually be needless, the
190 data being length-specified.
192 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
193 done during a receiving connection, and both used TLS, global info was
194 used rather than per-connection info for tracking the state of data
195 queued for transmission. This could result in a connection hang.
197 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
198 Previously, when delivering serveral messages down a single connection
199 only the first would provide a SIZE. This was due to the size information
200 not being properly tracked.
202 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
203 TAI (at 37 seconds currently), pretend to be in UTC for time-related
204 expansion and logging. Previously, spurious values such as a future
205 minute could be seen.
207 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
208 it could crash from a null-deref. This could also affect the
209 ${addresses: } operator and ${readsock } item.
211 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
212 message following a mime one, the variable was not reset.
214 JH/30 When an pipelined-connect fails at the first response, assume incorrect
215 cached capability (perhaps the peer reneged?) and immediately retry in
218 JH/31 Fix spurious detection of timeout while writing to transport filter.
220 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
221 an attempt to copy the string was made before checking it.
223 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
224 taint of the lookup key was maintained; we now regard the presence in the
225 filesystem as sufficient validation.
227 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
228 argument is supplied.
230 JH/35 The dsearch lookup now requires that the directory is an absolute path.
231 Previously this was not checked, and nonempty relative paths made an
232 access under Exim's current working directory.
234 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
235 Previously no event was raised.
237 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
238 parameter supplied by the sender MAIL FROM command. Previously it was
239 ignored, and only the check_spool_space option value for the required
242 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
243 the size of the signing public-key. Previously it was instead giving
244 the size of the signature hash.
246 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
247 the default. See the (new) dkim_verify_min_keysizes option.
249 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
250 and an ACL use a lookup for checking either the local_part or domain,
251 stale data could be accessed. Ensure that variable references are
252 dropped between messages.
254 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
255 by the client was not checked as pointing within response data before
256 being used. A malicious client could thus cause an out-of-bounds read and
257 possibly gain authentication. Fix by adding the check.
259 JH/42 Internationalisation: change the default for downconversion in the smtp
260 transport to be "if needed". Previously it was "as previously set" for
261 the message, which usually meant "if needed" for message-submission but
262 "no" for everything else. However, MTAs have been seen using SMTPUTF8
263 even when the envelope addresses did not need it, resulting in forwarding
264 failures to non-supporting MTAs. A downconvert in such cases will be
265 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
266 transport. The change does mean that addresses needing conversion will
267 be converted when previously a delivery failure would occur.
269 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
270 response was received it would be used unchecked in a fail-DSN, violating
271 standards on line-length limits. Truncate if needed.
273 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
274 doesn't work. (Additionally add a new main config option to configure the
281 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
282 side, to decode a TLS 1.3 packet capture.
284 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
285 Previously the default library behaviour applied, sending two, each in
288 JH/03 Debug output for ACL now gives the config file name and line number for
291 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
293 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
295 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
296 buffer overrun for (non-chunking) other transports.
298 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
299 TLS1.3, means that a server rejecting a client certificate is not visible
300 to the client until the first read of encrypted data (typically the
301 response to EHLO). Add detection for that case and treat it as a failed
302 TLS connection attempt, so that the normal retry-in-clear can work (if
303 suitably configured).
305 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
306 and/or domain. Found and fixed by Jason Betts.
308 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
309 configuration). If a CNAME target was not a wellformed name pattern, a
312 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
313 the OS reports them interleaved with other addresses.
315 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
316 used both for input and for a verify callout, both encrypted, SMTP
317 responses being sent by the server could be lost. This resulted in
318 dropped connections and sometimes bounces generated by a peer sending
321 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
322 string. Previously it was possible to cause undefined behaviour in a
323 library routine (usually a crash). Found by "zerons".
325 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
328 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
329 API was removed, so update to use the newer ones.
331 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
332 any timeout set, is taking a long time. Previously we would hang on to a
333 rotated logfile "forever" if the input was arriving with long gaps
334 (a previous attempt to fix addressed lack, for a long time, of initial
337 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
338 shared (NFS) environment. The length of the tempfile name is now
339 4 + 16 ("hdr.$message_exim_id") which might break on file
340 systems which restrict the file name length to lower values.
343 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
344 shared (NFS) environment.
346 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
347 did for all versions <4.90). Notably -M, -m, --invert, -I may be
350 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
351 on some platforms for bit 31.
353 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
354 to changes apparently associated with TLS1.3 handling some of the APIs
355 previously used were either nonfunctional or inappropriate. Strings
356 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
357 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
358 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
359 This affects log line X= elements, the $tls_{in,out}_cipher variables,
360 and the use of specific cipher names in the encrypted= ACL condition.
362 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
364 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
365 verification result was not updated unless hosts_require_ocsp applied.
367 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
368 queue_list_requires_admin set to false, non-admin users were denied the
371 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
372 directory-of-certs mode. Previously they were advertised despite the
375 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
376 A single TCP connection by a client will now hold a TLS connection open
377 for multiple message deliveries, by default. Previously the default was to
380 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
381 default. If built with the facility, DANE will be used. The facility
382 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
384 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
385 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
386 must be defined and you must still, unless you define DISABLE_TLS, manage
387 the the include-dir and library-file requirements that go with that
388 choice. Non-TLS builds are still supported.
390 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
393 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
394 default. If the platform supports and has the facility enabled, it will
395 be requested on all coneections.
397 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
398 controlled by the build-time option SUPPORT_PIPE_CONNECT.
400 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
402 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
403 success-DSN messages. Previously the From: header was always the default
404 one for these; the option was ignored.
406 JH/28 Fix the timeout on smtp response to apply to the whole response.
407 Previously it was reset for every read, so a teergrubing peer sending
408 single bytes within the time limit could extend the connection for a
409 long time. Credit to Qualsys Security Advisory Team for the discovery.
411 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
412 delivery address, which leaked information of the results of local
413 forwarding. Change to the original envelope recipient address, per
416 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
417 requested. Previously not bounce was generated and a log entry of
418 error ignored was made.
420 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
422 JH/32 Introduce a general tainting mechanism for values read from the input
423 channel, and values derived from them. Refuse to expand any tainted
424 values, to catch one form of exploit.
426 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
427 was unused and the unexpanded text used for the test. Found and
428 fixed by Ruben Jenster.
430 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
431 an attempt to use a TLS library read routine dereffed a nul pointer,
434 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
435 them in our smtp response.
437 JH/36 Have the general router option retry_use_local_part default to true when
438 any of the restrictive preconditions are set (to anything). Previously it
439 was only for check_local user. The change removes one item of manual
440 configuration which is required for proper retries when a remote router
441 handles a subset of addresses for a domain.
443 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
444 link count into consideration.
446 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
447 caused the extension of big_buffer, the following lines were ignored.
449 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
450 accordance with RFC 2308. Previously there was no expiry, so a longlived
451 receive process (eg. due to ACL delays) versus a short SOA value could
454 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
456 JH/39 Promote DMARC support to mainline.
458 JH/40 Bug 2452: Add a References: header to DSNs.
460 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
461 parameters. The relevant library call is documented as "Deprecated: This
462 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
463 3.6.0, DH parameters are negotiated following RFC7919."
465 HS/06 Change the default of dnssec_request_domains to "*"
467 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
468 carried on and emitted a BDAT command, even when PIPELINING was not
471 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
472 buffer was used for the filename, resulting in a trap when tainted
473 arguments (eg. $domain) were used.
475 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
476 recommended to avoid a possible server-load attack. The feature can be
477 re-enabled via the openssl_options main cofiguration option.
479 JH/45 local_scan API: documented the current smtp_printf() call. This changed
480 for version 4.90 - adding a "more data" boolean to the arguments.
481 Bumped the ABI version number also, this having been missed previously;
482 release versions 4.90 to 4.92.3 inclusive were effectively broken in
483 respect of usage of smtp_printf() by either local_scan code or libraries
484 accessed via the ${dlfunc } expansion item. Both will need coding
485 adjustment for any calls to smtp_printf() to match the new function
486 signature; a FALSE value for the new argument is always safe.
488 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
489 the file-offset (which the Linux syscall does, and exim expects); this
490 resulted in an indefinite loop.
492 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
493 to do ARC verification. The Authentication-Results: header line added
494 by the configuration then had no ARC item.
500 JH/01 Remove code calling the customisable local_scan function, unless a new
501 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
503 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
504 non-signal-safe functions being used.
506 JH/03 Bug 2269: When presented with a received message having a stupidly large
507 number of DKIM-Signature headers, disable DKIM verification to avoid
508 a resource-consumption attack. The limit is set at twenty.
510 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
511 report of oldest_pass in ${authres } in consequence, and separate out
512 some descriptions of reasons for verification fail.
514 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
515 files in the spool were present and unlocked. A queue-runner could spot
516 them, resulting in a duplicate delivery. Fix that by doing the unlock
517 after the unlink. Investigation by Tim Stewart. Take the opportunity to
518 add more error-checking on spoolfile handling while that code is being
521 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
522 No known attacks, no CVE, this is defensive hardening.
524 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
525 a queue-runner could start a delivery while other operations were ongoing.
526 Cutthrough delivery was a common victim, resulting in duplicate delivery.
527 Found and investigated by Tim Stewart. Fix by using the open message data
528 file handle rather than opening another, and not locally closing it (which
529 releases a lock) for that case, while creating the temporary .eml format
530 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
532 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
533 $sender_verify_failure/$recipient_verify_failure to "random".
535 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
538 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
539 Previously this would segfault.
541 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
544 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
545 like zero, since the resolver should be doing this for us, But we need one
546 as a CNAME but no MX presence gets the CNAME returned; we need to check
547 that doesn't point to an MX to declare it "no MX returned" rather than
548 "error, loop". A new main option is added so the older capability of
549 following some limited number of chain links is maintained.
551 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
553 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
554 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
555 now-deprecated earlier definitions used only specified the range up to TLS
556 1.2 (in the older-version library docs).
558 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
560 JH/15 Rework TLS client-side context management. Stop using a global, and
561 explicitly pass a context around. This enables future use of TLS for
562 connections to service-daemons (eg. malware scanning) while a client smtp
563 connection is using TLS; with cutthrough connections this is quite likely.
565 JH/16 Fix ARC verification to do AS checks in reverse order.
567 JH/17 Support a "tls" option on the ${readsocket } expansion item.
569 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
570 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
571 Previously the "utf8" would be re-prepended for every additional message.
573 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
574 Previously thery were accepted, resulting in issues when attempting to
575 forward messages to a non-supporting MTA.
577 PP/02 Let -n work with printing macros too, not just options.
579 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
580 one parent address was copied, and bogus data was used at delivery-logging
581 time. Either a crash (after delivery) or bogus log data could result.
582 Discovery and analysis by Tim Stewart.
584 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
585 Previously if the string ended mid-character, we did not insert the
586 promised '?' replacement.
588 PP/04 Documentation: current string operators work on bytes, not codepoints.
590 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
591 should pack well giving a smaller memory footprint so better caching and
592 therefore performance. Group the declarations where this can't be done so
593 that the byte-sized flag variables are not interspersed among pointer
594 variables, giving a better chance of good packing by the compiler.
596 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
597 non-null, to avoid issues with sites running BATV. Previously reports were
598 sent with an empty envelope sender so looked like bounces.
600 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
601 The ignore_error flag wasn't being returned from the filter subprocess so
602 was not set for later routers. Investigation and fix by Matthias Kurz.
604 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
605 and a msg:complete for the whole, when a message is manually removed using
606 -Mrm. Developement by Matthias Kurz, hacked on by JH.
608 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
609 a "Gnu special" function, asprintf() in the DB utility binary builds; I
610 hope that is portable enough.
612 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
613 requiring a known-CA anchor certificate; make it now rely entirely on the
614 TLSA as an anchor. Checking the name on the leaf cert against the name
615 on the A-record for the host is still done for TA (but not for EE mode).
617 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
618 included in delivery lines for non-proxied connections, when compiled with
619 SUPPORT_SOCKS and running with proxy logging enabled.
621 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
622 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
623 move the existing event to fire before the normal logging of message
624 failure so that custom logging is bracketed by normal logging.
626 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
627 msg:fail:internal event. Developement by Matthias Kurz.
629 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
630 far too small for todays use of crypto signatures stored there. Go all
631 the way to the max DNS message size of 64kB, even though this might be
632 overmuch for IOT constrained device use.
634 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
635 copy a string over itself. The library routine is documented as not
636 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
638 JH/32 For main options check_spool_space and check_inode_space, where the
639 platform supports 64b integers, support more than the previous 2^31 kB
640 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
641 the previous G, M, k.
643 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
644 $authenticated_fail_id variable on authentication failure. Previously
647 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
648 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
649 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
650 GNUTLS_SEC_PARAM_MEDIUM.
652 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
653 side. Previously we would continue as if no SNI had been received.
655 JH/36 Harden the handling of string-lists. When a list consisted of a sole
656 "<" character, which should be a list-separator specification, we walked
657 off past the nul-terimation.
659 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
660 causes) even when the retry time is not yet met. Previously they were
661 not, meaning that when (say) an account was over-quota and temp-rejecting,
662 and multiple senders' messages were queued, only one sender would get
663 notified on each configured delay_warning cycle.
665 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
667 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
668 cipher-suites, an error can be left on the stack even for a succeeding
669 accept; this results in impossible error messages when a later operation
672 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
673 return error codes indicating retry. Under TLS1.3 this becomes required.
675 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
676 it only wrote the new authenticators, resulting in a lack of tracking of
677 peer changes of ESMTP extensions until the next cache flush.
679 JH/41 Fix the loop reading a message header line to check for integer overflow,
680 and more-often against header_maxsize. Previously a crafted message could
681 induce a crash of the recive process; now the message is cleanly rejected.
683 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
684 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
690 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
691 When redis_servers is set to a list of > 1 element, and the Redis servers
692 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
693 case of MOVED into a DEFER case instead, thus moving the query onto the
694 next server in the list. For a cluster of N elements, all N servers must
695 be defined in redis_servers.
697 GF/02 Catch and remove uninitialized value warning in exiqsumm
698 Check for existence of @ARGV before looking at $ARGV[0]
700 JH/01 Replace the store_release() internal interface with store_newblock(),
701 which internalises the check required to safely use the old one, plus
702 the allocate and data copy operations duplicated in both (!) of the
703 extant use locations.
705 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
706 modifier. This matches the restriction on the commandline.
708 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
709 Previously only the last row was returned.
711 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
712 we assumed that tags in the header were well-formed, and parsed the
713 element content after inspecting only the first char of the tag.
714 Assumptions at that stage could crash the receive process on malformed
717 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
718 While running the DKIM ACL we operate on the Permanent memory pool so that
719 variables created with "set" persist to the DATA ACL. Also (at any time)
720 DNS lookups that fail create cache records using the Permanent pool. But
721 expansions release any allocations made on the current pool - so a dnsdb
722 lookup expansion done in the DKIM ACL releases the memory used for the
723 DNS negative-cache, and bad things result. Solution is to switch to the
724 Main pool for expansions.
725 While we're in that code, add checks on the DNS cache during store_reset,
726 active in the testsuite.
727 Problem spotted, and debugging aided, by Wolfgang Breyha.
729 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
730 When none of the hosts presented to a transport match an already-open
731 connection, close it and proceed with the list. Previously we would
732 queue the message. Spotted by Lena with Yahoo, probably involving
735 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
736 Previously a spurious "250 OK id=" response was appended to the proper
739 JH/08 The "support for" informational output now, which built with Content
740 Scanning support, has a line for the malware scanner interfaces compiled
741 in. Interface can be individually included or not at build time.
743 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
744 by the template makefile "src/EDITME". The "STREAM" support for an older
745 ClamAV interface method is removed.
747 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
748 rows affected is given instead).
750 JH/11 The runtime Berkeley DB library version is now additionally output by
751 "exim -d -bV". Previously only the compile-time version was shown.
753 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
754 SMTP connection. Previously, when one had more receipients than the
755 first, an abortive onward connection was made. Move to full support for
756 multiple onward connections in sequence, handling cutthrough connection
757 for all multi-message initiating connections.
759 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
760 routers. Previously, a multi-recipient message would fail to match the
761 onward-connection opened for the first recipient, and cause its closure.
763 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
764 a timeout on read on a GnuTLS initiating connection, resulting in the
765 initiating connection being dropped. This mattered most when the callout
766 was marked defer_ok. Fix to keep the two timeout-detection methods
769 JH/15 Relax results from ACL control request to enable cutthrough, in
770 unsupported situations, from error to silently (except under debug)
771 ignoring. This covers use with PRDR, frozen messages, queue-only and
774 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
776 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
777 metadata, resulting in a crash in free().
779 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
780 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
781 Broken also in d185889f4, with init system revamp.
783 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
784 Previously we abruptly closed the connection after reading a malware-
785 found indication; now we go on to read the "scan ok" response line,
788 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
789 ACL. Previously, a crash would result.
791 JH/19 Speed up macro lookups during configuration file read, by skipping non-
792 macro text after a replacement (previously it was only once per line) and
793 by skipping builtin macros when searching for an uppercase lead character.
795 JH/20 DANE support moved from Experimental to mainline. The Makefile control
796 for the build is renamed.
798 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
799 was allocated for every new TLS startup, meaning one per message. Fix
800 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
802 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
803 reported the original. Fix to report (as far as possible) the ACL
804 result replacing the original.
806 JH/23 Fix memory leak during multi-message connections using STARTTLS under
807 OpenSSL. Certificate information is loaded for every new TLS startup,
808 and the resources needed to be freed.
810 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
812 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
815 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
816 DATA response info to the (existing) per-recipient response info for
817 the "C=" log element. It can have useful tracking info from the
818 destination system. Patch from Simon Arlott.
820 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
821 length value. Previously this would segfault.
823 HS/02 Support Avast multiline protoocol, this allows passing flags to
824 newer versions of the scanner.
826 JH/28 Ensure that variables possibly set during message acceptance are marked
827 dead before release of memory in the daemon loop. This stops complaints
828 about them when the debug_store option is enabled. Discovered specifically
829 for sender_rate_period, but applies to a whole set of variables.
830 Do the same for the queue-runner and queue-list loops, for variables set
831 from spool message files. Do the same for the SMTP per-message loop, for
832 certain variables indirectly set in ACL operations.
834 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
835 as a multi-recipient message from a mailinglist manager). The coding had
836 an arbitrary cutoff number of characters while checking for more input;
837 enforced by writing a NUL into the buffer. This corrupted long / fast
838 input. The problem was exposed more widely when more pipelineing of SMTP
839 responses was introduced, and one Exim system was feeding another.
840 The symptom is log complaints of SMTP syntax error (NUL chars) on the
841 receiving system, and refused recipients seen by the sending system
842 (propating to people being dropped from mailing lists).
843 Discovered and pinpointed by David Carter.
845 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
846 replaced by the ${authresults } expansion.
848 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
850 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
851 allows proper process termination in container environments.
853 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
854 Previously the "final dot" had a newline after it; ensure it is CR,LF.
856 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
857 and "err_perm", deprecated since 4.83 when the RFC-defined words
858 "temperror" and "permerror" were introduced.
860 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
861 transport-filters or DKIM-signing. The restriction was lost in the
862 consolidation of verify-callout and delivery SMTP handling.
863 Extend the restriction to also cover ARC-signing.
865 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
866 in defer=pass mode supply a 450 to the initiator. Previously the message
869 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
870 tls_require_ciphers is used as before.
872 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
873 "pass_unscanned". Only tmpfails from the scanner are written to
874 the paniclog, as they may require admin intervention (permission
875 denied, license issues). Other scanner errors (like decompression
876 bombs) do not cause a paniclog entry.
878 JH/36 Fix reinitialisation of DKIM logging variable between messages.
879 Previously it was possible to log spurious information in receive log
882 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
883 triggered odd behaviour from Outlook Express clients.
885 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
888 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
889 since the IETF WG has not yet settled on that versus the original
890 "bare" representation.
892 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
893 Previously the millisecond value corrupted the output.
894 Fix also for syslog_pid=no and log_selector +pid, for which the pid
895 corrupted the output.
901 JH/01 Rework error string handling in TLS interface so that the caller in
902 more cases is responsible for logging. This permits library-sourced
903 string to be attached to addresses during delivery, and collapses
904 pairs of long lines into single ones.
906 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
907 during configuration. Wildcards are allowed and expanded.
909 JH/02 Rework error string handling in DKIM to pass more info back to callers.
910 This permits better logging.
912 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
913 do not close it down and have the child transport start it up again on
914 the passed-on TCP connection. Instead, proxy the child (and any
915 subsequent ones) for TLS via a unix-domain socket channel. Logging is
916 affected: the continued delivery log lines do not have any DNSSEC, TLS
917 Certificate or OCSP information. TLS cipher information is still logged.
919 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
920 identical IP addresses on different listening ports. Will also affect
923 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
924 add noisy ifdef guards to special-case this sillyness.
925 Patch from Bernd Kuhls.
927 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
928 than 255 are no longer allowed.
930 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
931 Disable the session-cache too, which might reduce our load. Since we
932 currrectly use a new context for every connection, both as server and
933 client, there is no benefit for these.
934 GnuTLS appears to not support tickets server-side by default (we don't
935 call gnutls_session_ticket_enable_server()) but client side is enabled
936 by default on recent versions (3.1.3 +) unless the PFS priority string
939 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
940 <https://reproducible-builds.org/specs/source-date-epoch/>.
942 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
943 the check for any unsuccessful recipients did not notice the limit, and
944 erroneously found still-pending ones.
946 JH/08 Pipeline CHUNKING command and data together, on kernels that support
947 MSG_MORE. Only in-clear (not on TLS connections).
949 JH/09 Avoid using a temporary file during transport using dkim. Unless a
950 transport-filter is involved we can buffer the headers in memory for
951 creating the signature, and read the spool data file once for the
952 signature and again for transmission.
954 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
955 4.77 as the kernel support then wasn't solid, having issues in 64bit
956 mode. Now, it's been long enough. Add support for FreeBSD also.
958 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
959 case where the routing stage had gathered several addresses to send to
960 a host before calling the transport for the first, we previously failed
961 to close down TLS in the old transport process before passing the TCP
962 connection to the new process. The new one sent a STARTTLS command
963 which naturally failed, giving a failed delivery and bloating the retry
964 database. Investigation and fix prototype from Wolfgang Breyha.
966 JH/12 Fix check on SMTP command input synchronisation. Previously there were
967 false-negatives in the check that the sender had not preempted a response
968 or prompt from Exim (running as a server), due to that code's lack of
969 awareness of the SMTP input buffering.
971 PP/04 Add commandline_checks_require_admin option.
972 Exim drops privileges sanely, various checks such as -be aren't a
973 security problem, as long as you trust local users with access to their
974 own account. When invoked by services which pass untrusted data to
975 Exim, this might be an issue. Set this option in main configuration
976 AND make fixes to the calling application, such as using `--` to stop
979 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
980 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
981 responses to those, into a single TLS record each way (this usually means
982 a single packet). As a side issue, smtp_enforce_sync now works on TLS
985 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
986 affects you only if you're dancing at the edge of the param size limits.
987 If you are, and this message makes sense to you, then: raise the
988 configured limit or use OpenSSL 1.1. Nothing we can do for older
991 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
992 cmdline element to get the documented default one. Previously it was
995 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
996 are unsuable for non-message-specific reasons - eg. connection timeout,
997 banner-time rejection.
999 JH/16 Fix logging of delivery remote port, when specified by router, under
1002 PP/06 Repair manualroute's ability to take options in any order, even if one
1003 is the name of a transport.
1006 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1008 JH/17 Change the list-building routines interface to use the expanding-string
1009 triplet model, for better allocation and copying behaviour.
1011 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1012 Previously it was constructed the first time a possibly-matching string
1013 was met in the configuration file input during startup; now it is done
1016 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1017 compatible one, to avoid the (poorly documented) possibility of a config
1018 file in the working directory redirecting the DB files, possibly correpting
1019 some existing file. CVE-2017-10140 assigned for BDB.
1021 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1022 cache-hot. Previously, although the result was properly cached, the
1023 initial verify call returned a defer.
1025 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1026 the main verify for receipient in uncached-mode.
1028 JH/22 Retire historical build files to an "unsupported" subdir. These are
1029 defined as "ones for which we have no current evidence of testing".
1031 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1032 if present. Previously it was ignored.
1034 JH/24 Start using specified-initialisers in C structure init coding. This is
1035 a C99 feature (it's 2017, so now considered safe).
1037 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1038 if was a fixed-sized field and bitmask ops via macros; it is now more
1041 PP/07 GitHub PR 56: Apply MariaDB build fix.
1042 Patch provided by Jaroslav Škarvada.
1044 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1045 during Coverity cleanups [4.87 JH/47]
1046 Diagnosis and fix provided by Michael Fischer v. Mollard.
1048 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1049 the right size to place the terminating semicolon on its own folded
1050 line, the header hash was calculated to an incorrect value thanks to
1051 the (relaxed) space the fold became.
1053 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1054 and confused the parent.
1056 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1057 which could crash as a result. This could lead to undeliverable messages.
1059 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1062 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1063 matters on fast-turnover and PID-randomising systems, which were getting
1064 out-of-order delivery.
1066 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1067 a possibly-overlapping copy. The symptom was that "Remote host closed
1068 connection in response to HELO" was logged instead of the actual 4xx
1071 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1072 Previously only that bufferd was discarded, resulting in SYMTP command
1075 JH/32 DKIM: when a message has multiple signatures matching an identity given
1076 in dkim_verify_signers, run the dkim acl once for each. Previously only
1077 one run was done. Bug 2189.
1079 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1080 "panic the current process" to "deliberately defer". The panic log is
1081 still written with the problem list name; the mail and reject logs now
1082 get a temp-reject line for the message that was being handled, saying
1083 something like "domains check lookup or other defer". The SMTP 451
1084 message is still "Temporary local problem".
1086 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1087 A crafted sequence of BDAT commands could result in in-use memory beeing
1088 freed. CVE-2017-16943.
1090 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1091 from SMTP input. Previously it was always done; now only done for DATA
1092 and not BDAT commands. CVE-2017-16944.
1094 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1095 to the message (such as an overlong header line). Previously this was
1096 not done and we did not exit BDAT mode. Followon from the previous item
1097 though a different problem.
1103 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1104 than -2003 did; needs libidn2 in addition to libidn.
1106 JH/02 The path option on a pipe transport is now expanded before use.
1108 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1109 Patch provided by "Björn", documentation fix added too.
1111 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1112 missing a wire-to-host endian conversion.
1114 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1115 close after a BDAT command line could be taken as a following command,
1116 giving a synch failure. Fix by only checking for synch immediately
1117 before acknowledging the chunk.
1119 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1120 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1121 macro. Patches provided by Josh Soref.
1123 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1124 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1125 by IANA as a service extension. However, John Klensin suggests that we
1128 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1129 the dkim code may be unix-mode line endings rather than smtp wire-format
1130 CRLF, so prepend a CR to any bare LF.
1132 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1133 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1135 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1136 the first were themselves being wrongly included in the feed into dkim
1137 processing; with most chunk sizes in use this resulted in an incorrect
1138 body hash calculated value.
1140 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1141 DKIM signature block, for verification. Although advised against by
1142 standards it is specifically not ruled illegal.
1144 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1146 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1147 missing a body hash (the bh= tag).
1149 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1150 It seems that HAProxy sends the Proxy Protocol information in clear and
1151 only then does a TLS startup, so do the same.
1153 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1154 TCP connections (such as for Spamd) unless the daemon successfully set
1155 Fast Open mode on its listening sockets. This fixes breakage seen on
1156 too-old kernels or those not configured for Fast Open, at the cost of
1157 requiring both directions being enabled for TFO, and TFO never being used
1158 by non-daemon-related Exim processes.
1160 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1161 endings, at least on the first header line. Try to canonify any that get
1162 past that check, despite the cost.
1164 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1165 now limited to an arbitrary five deep, while parsing addresses with the
1166 strip_excess_angle_brackets option enabled.
1168 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1169 instead leave the unprompted TLS handshake in socket buffer for the
1170 TLS library to consume.
1172 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1174 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1176 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1177 region in one operation, for speed, and this leaves assigned pointers
1178 dangling. Add checks run only under the testsuite which checks all
1179 variables at a store-reset and panics on a dangling pointer; add code
1180 explicitly nulling out all the variables discovered. Fixes one known
1181 bug: a transport crash, where a dangling pointer for $sending_ip_address
1182 originally assigned in a verify callout, is re-used.
1184 PP/06 Drop '.' from @INC in various Perl scripts.
1186 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1188 PP/08 Reduce a number of compilation warnings under clang; building with
1189 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1190 should be warning-free.
1192 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1194 HS/01 Fix portability problems introduced by PP/08 for platforms where
1195 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1197 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1198 chunk. This allows us to accept broken chunked messages. We need a more
1199 general solution here.
1201 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1202 already-broken messages in the queue.
1204 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1206 JH/19 Fix reference counting bug in routing-generated-address tracking.
1212 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1213 supports it and a size is available (ie. the sending peer gave us one).
1215 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1216 years of being deprecated). The replacements are the ACLs
1217 acl_smtp_mime and acl_not_smtp_mime.
1219 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1220 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1221 or even an in-clear connection were permitted. Now, if the host lookup
1222 was dnssec and dane was requested then the host is only used if the
1223 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1224 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1225 if one fails this test.
1226 This means that a poorly-configured remote DNS will make it incommunicado;
1227 but it protects against a DNS-interception attack on it.
1229 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1230 non-noisy when a race steals the message being considered.
1232 JH/05 If main configuration option tls_certificate is unset, generate a
1233 self-signed certificate for inbound TLS connections.
1235 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1236 in rewrites and routers.
1238 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1239 and logged a warning sing 4.83; now they are a configuration file error.
1241 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1242 (lacking @domain). Apply the same qualification processing as RCPT.
1244 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1246 JH/10 Support ${sha256:} applied to a string (as well as the previous
1249 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1250 a cutthrough deliver is pending, as we always want to make a connection.
1251 This also avoids re-routing the message when later placing the cutthrough
1252 connection after a verify cache hit.
1253 Do not update it with the verify result either.
1255 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1256 when routing results in more than one destination address.
1258 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1259 signing (which inhibits the cutthrough capability). Previously only
1260 the presence of an option was tested; now an expansion evaluating as
1261 empty is permissible (obviously it should depend only on data available
1262 when the cutthrough connection is made).
1264 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1265 the relevant preceding SMTP command did not note the pipelining mode.
1267 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1268 Previously they were not counted.
1270 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1271 as one having no matching records. Previously we deferred the message
1272 that needed the lookup.
1274 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1275 distinguished as "(=".
1277 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1278 for missing MX records. Previously it only worked for missing A records.
1280 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1282 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1283 after the data-go-ahead and data-ack. Patch from Jason Betts.
1285 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1286 even for a "none" policy. Patch from Tony Meyer.
1288 JH/22 Fix continued use of a connection for further deliveries. If a port was
1289 specified by a router, it must also match for the delivery to be
1292 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1293 When one of the recipients of a message was unsuitable for the connection
1294 (has no matching addresses), we lost track of needing to mark it
1295 deferred. As a result mail would be lost.
1297 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1299 JH/25 Decoding ACL controls is now done using a binary search; the source code
1300 takes up less space and should be simpler to maintain. Merge the ACL
1301 condition decode tables also, with similar effect.
1303 JH/26 Fix problem with one_time used on a redirect router which returned the
1304 parent address unchanged. A retry would see the parent address marked as
1305 delivered, so not attempt the (identical) child. As a result mail would
1308 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1309 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1310 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1313 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1314 Main config options check_{log,spool}_{inodes,space} are now
1315 100 inodes, 10MB unless set otherwise in the configuration.
1317 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1318 Previously it only applied to the main-section connection policy
1321 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1323 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1324 by me. Added RFC7919 DH primes as an alternative.
1326 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1327 are not in the system include path.
1329 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1330 GnuTLS, when a session startup failed (eg because the client disconnected)
1331 Exim did stdio operations after fclose. This was exposed by a recent
1332 change which nulled out the file handle after the fclose.
1334 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1335 signed directly by the cert-signing cert, rather than an intermediate
1336 OCSP-signing cert. This is the model used by LetsEncrypt.
1338 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1340 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1341 an incoming connection.
1343 HS/02 Bug 1802: Do not half-close the connection after sending a request
1346 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1347 fallback to "prime256v1".
1349 JH/34 SECURITY: Use proper copy of DATA command in error message.
1350 Could leak key material. Remotely exploitable. CVE-2016-9963.
1356 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1357 and 3.4.4 - once the server is enabled to respond to an OCSP request
1358 it does even when not requested, resulting in a stapling non-aware
1359 client dropping the TLS connection.
1361 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1362 support variable-length bit vectors. No functional change.
1364 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1365 The I= interface field on outgoing lines is now after the H= remote
1366 host field, same as incoming lines. There is a separate
1367 outgoing_interface log selector which allows you to disable the
1370 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1371 If not running log_selector +smtp_connection the mainlog would be held
1372 open indefinitely after a "too many connections" event, including to a
1373 deleted file after a log rotate. Leave the per net connection logging
1374 leaving it open for efficiency as that will be quickly detected by the
1375 check on the next write.
1377 HS/01 Bug 1671: Fix post transport crash.
1378 Processing the wait-<transport> messages could crash the delivery
1379 process if the message IDs didn't exist for some reason. When
1380 using 'split_spool_directory=yes' the construction of the spool
1381 file name failed already, exposing the same netto behaviour.
1383 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1384 mime_regex ACL conditions.
1386 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1387 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1388 to HELO, local diagnostic string.
1390 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1391 log line to debug. Even when configured with a tls authenticator many
1392 client connections are expected to not authenticate in this way, so
1393 an authenticate fail is not an error.
1395 HS/02 Add the Exim version string to the process info. This way exiwhat
1396 gives some more detail about the running daemon.
1398 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1399 matter for fast-change records such as DNSBLs.
1401 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1402 retry record, even if constant. There may be multiple transports with
1403 different interface settings and the retry behaviour needs to be kept
1406 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1408 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1410 JH/10 Bug 840: fix log_defer_output option of pipe transport
1412 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1413 hosts_randomize. This matters a lot when combined with mua_wrapper.
1415 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1416 ${quote_pgsql:<string>} operator.
1418 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1420 JH/14 Change header file name for freeradius-client. Relevant if compiling
1421 with Radius support; from the Gentoo tree and checked under Fedora.
1423 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1425 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1426 option transport_filter, meaning no filtering.
1428 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1430 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1431 defaults to "*" (all hosts). The variable is now available when not built
1432 with TLS, default unset, mainly to enable keeping the testsuite sane.
1433 If a server certificate is not supplied (via tls_certificate) an error is
1434 logged, and clients will find TLS connections fail on startup. Presumably
1435 they will retry in-clear.
1436 Packagers of Exim are strongly encouraged to create a server certificate
1437 at installation time.
1439 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1440 with the $config_file variable.
1442 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1443 in transport context, after the attempt, and per-recipient. The latter type
1444 is per host attempted. The event data is the error message, and the errno
1445 information encodes the lookup type (A vs. MX) used for the (first) host,
1446 and the trailing two digits of the smtp 4xx response.
1448 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1449 to write to mainlog (or rejectlog, paniclog) in the window between file
1450 creation and permissions/ownership being changed. Particularly affects
1451 installations where exicyclog is run as root, rather than exim user;
1452 result is that the running daemon panics and dies.
1454 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1456 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1457 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1458 "pri" and "weight". Note that the previous implicit priority given by the
1459 list order is no longer honoured.
1461 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1462 for DKIM processing.
1464 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1465 by defining SUPPORT_SOCKS.
1467 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1468 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1469 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1470 variables are renamed to proxy_{local,external}_{address,port}.
1472 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1473 for a build by defining SUPPORT_I18N
1475 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1476 of the query string, and make ${quote_redis:} do that quoting.
1478 JH/29 Move Events support from Experimental to mainline, enabled by default
1479 and removable for a build by defining DISABLE_EVENT.
1481 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1483 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1484 cached by the daemon.
1486 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1487 by defining LOOKUP_REDIS. The libhiredis library is required.
1489 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1490 keys are given for lookup.
1492 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1493 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1494 only supported when built with TLS support. The PolarSSL SHA routines
1495 are still used when the TLS library is too old for convenient support.
1497 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1498 openssl_options), for security. OpenSSL forces this from version 1.1.0
1499 server-side so match that on older versions.
1501 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1502 allocation for $value could be released as the expansion processing
1503 concluded, but leaving the global pointer active for it.
1505 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1506 and to use the domains and local_parts ACL conditions.
1508 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1509 incorrectly not doubled on cutthrough transmission, hence seen as a
1510 body-termination at the receiving system - resulting in truncated mails.
1511 Commonly the sender saw a TCP-level error, and retransmitted the message
1512 via the normal store-and-forward channel. This could result in duplicates
1513 received - but deduplicating mailstores were liable to retain only the
1514 initial truncated version.
1516 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1518 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1520 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1521 we're in there, support oversigning also; bug 1309.
1523 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1525 HS/04 Add support for keep_environment and add_environment options.
1527 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1528 either intentional arithmetic overflow during PRNG, or testing config-
1531 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1532 delivery resulted in actual delivery. Cancel cutthrough before DATA
1535 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1536 rejects a recipient: pass the reject to the originator.
1538 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1539 Many were false-positives and ignorable, but it's worth fixing the
1542 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1543 for the new environment-manipulation done at startup. Move the routines
1544 from being local to tls.c to being global via the os.c file.
1546 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1547 an extract embedded as result-arg for a map, the first arg for extract
1548 is unavailable so we cannot tell if this is a numbered or keyed
1549 extraction. Accept either.
1555 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1558 JH/02 The smtp transport option "multi_domain" is now expanded.
1560 JH/03 The smtp transport now requests PRDR by default, if the server offers
1563 JH/04 Certificate name checking on server certificates, when exim is a client,
1564 is now done by default. The transport option tls_verify_cert_hostnames
1565 can be used to disable this per-host. The build option
1566 EXPERIMENTAL_CERTNAMES is withdrawn.
1568 JH/05 The value of the tls_verify_certificates smtp transport and main options
1569 default to the word "system" to access the system default CA bundle.
1570 For GnuTLS, only version 3.0.20 or later.
1572 JH/06 Verification of the server certificate for a TLS connection is now tried
1573 (but not required) by default. The verification status is now logged by
1574 default, for both outbound TLS and client-certificate supplying inbound
1577 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1580 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1581 Status Notification (bounce) messages are now MIME format per RFC 3464.
1582 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1583 under the control of the dsn_advertise_hosts option, and routers may
1584 have a dsn_lasthop option.
1586 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1587 default, modifiable by a malware= option. The list separator for
1588 the options can now be changed in the usual way. Bug 68.
1590 JH/10 The smtp_receive_timeout main option is now expanded before use.
1592 JH/11 The incoming_interface log option now also enables logging of the
1593 local interface on delivery outgoing connections.
1595 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1596 if the interface and destination host and port all match.
1598 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1601 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1602 Patch from Andrew Lewis.
1604 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1605 now supports optional time-restrictions, weighting, and priority
1606 modifiers per server. Patch originally by <rommer@active.by>.
1608 JH/16 The spamd_address main option now supports a mixed list of local
1609 and remote servers. Remote servers can be IPv6 addresses, and
1610 specify a port-range.
1612 JH/17 Bug 68: The spamd_address main option now supports an optional
1613 timeout value per server.
1615 JH/18 Bug 1581: Router and transport options headers_add/remove can
1616 now have the list separator specified.
1618 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1621 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1624 JH/21 Support for the A6 type of dns record is withdrawn.
1626 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1627 rather than the verbs used.
1629 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1630 from 255 to 1024 chars.
1632 JH/24 Verification callouts now attempt to use TLS by default.
1634 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1635 are generic router options now. The defaults didn't change.
1637 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1638 Original patch from Alexander Shikoff, worked over by JH.
1640 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1641 files if ZCAT_COMMAND is not executable.
1643 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1645 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1647 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1648 Normally benign, it bites when the pair was led to by a CNAME;
1649 modern usage is to not canonicalize the domain to a CNAME target
1650 (and we were inconsistent anyway for A-only vs AAAA+A).
1652 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1654 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1655 when evaluating $sender_host_dnssec.
1657 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1658 $sender_helo_dnssec variable.
1660 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1662 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1664 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1666 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1667 documented as working, but never had. Support all but $spam_report.
1669 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1670 added for tls authenticator.
1672 HS/03 Add perl_taintmode main config option
1678 TL/01 When running the test suite, the README says that variables such as
1679 no_msglog_check are global and can be placed anywhere in a specific
1680 test's script, however it was observed that placement needed to be near
1681 the beginning for it to behave that way. Changed the runtest perl
1682 script to read through the entire script once to detect and set these
1683 variables, reset to the beginning of the script, and then run through
1684 the script parsing/test process like normal.
1686 TL/02 The BSD's have an arc4random API. One of the functions to induce
1687 adding randomness was arc4random_stir(), but it has been removed in
1688 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1689 function when detected.
1691 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1692 cause callback expansion.
1694 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1695 syntax errors in an expansion can be treated as a string instead of
1696 logging or causing an error, due to the internal use of bool_lax
1697 instead of bool when processing it.
1699 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1700 server certificates when making smtp deliveries.
1702 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1704 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1706 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1708 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1709 Merged patch from Sebastian Wiedenroth.
1711 JH/05 Fix results-pipe from transport process. Several recipients, combined
1712 with certificate use, exposed issues where response data items split
1713 over buffer boundaries were not parsed properly. This eventually
1714 resulted in duplicates being sent. This issue only became common enough
1715 to notice due to the introduction of connection certificate information,
1716 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1718 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1719 size buffer was used, resulting in syntax errors when an expansion
1722 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1723 version 3.3.6 or later.
1725 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1726 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1727 both become "event_action", the variables become $event_name, $event_data
1728 and $event_defer_errno. There is a new variable $verify_mode, usable in
1729 routers, transports and related events. The tls:cert event is now also
1730 raised for inbound connections, if the main configuration event_action
1733 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1734 early OCSP support, but no stapling (appears to be less than 1.0.0).
1736 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1737 server certificate names available under the smtp transport option
1738 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1741 JH/10 Time-related extraction expansions from certificates now use the main
1742 option "timezone" setting for output formatting, and are consistent
1743 between OpenSSL and GnuTLS compilations. Bug 1541.
1745 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1746 encoded parameter in the incoming message. Bug 1558.
1748 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1749 include certificate info, eximon was claiming there were spoolfile
1752 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1754 JH/14 Log delivery-related information more consistently, using the sequence
1755 "H=<name> [<ip>]" wherever possible.
1757 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1758 are problematic for Debian distribution, omit them from the release
1761 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1763 JH/16 Fix string representation of time values on 64bit time_t architectures.
1766 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1767 output list separator was used.
1772 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1773 checkers that were complaining about end of non-void function with no
1776 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1777 This was a regression introduced in 4.83 by another bugfix.
1779 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1781 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1782 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1788 TF/01 Correctly close the server side of TLS when forking for delivery.
1790 When a message was received over SMTP with TLS, Exim failed to clear up
1791 the incoming connection properly after forking off the child process to
1792 deliver the message. In some situations the subsequent outgoing
1793 delivery connection happened to have the same fd number as the incoming
1794 connection previously had. Exim would try to use TLS and fail, logging
1795 a "Bad file descriptor" error.
1797 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1798 utilities have not been installed.
1800 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1801 temporary space as the ACL may create new global variables.
1803 TL/01 LDAP support uses per connection or global context settings, depending
1804 upon the detected version of the libraries at build time.
1806 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1807 to extract and use the src ip:port in logging and expansions as if it
1808 were a direct connection from the outside internet. PPv2 support was
1809 updated based on HAProxy spec change in May 2014.
1811 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1813 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1814 Properly escape header and check for NULL return.
1816 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1819 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1821 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1822 characters in header names, implemented as a verify condition.
1823 Contributed by Michael Fischer v. Mollard.
1825 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1826 results permerror and temperror. Previous values are deprecated but
1827 still accepted. In a future release, err_perm and err_temp will be
1828 completely removed, which will be a backward incompatibility if the
1829 ACL tests for either of these two old results. Patch contributed by
1830 user bes-internal on the mailing list.
1832 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1834 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1835 selectors, in both main and reject logs.
1837 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1840 JH/07 Add malware type "sock" for talking to simple daemon.
1842 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1844 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1845 routers/transports under cutthrough routing.
1847 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1848 numbers. Touch up "bool" conditional to keep the same definition.
1850 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1852 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1854 JH/12 Expand items in router/transport headers_add or headers_remove lists
1855 individually rather than the list as a whole. Bug 1452.
1857 Required for reasonable handling of multiple headers_ options when
1858 they may be empty; requires that headers_remove items with embedded
1859 colons must have them doubled (or the list-separator changed).
1861 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1862 view the policy declared in the DMARC record. Currently, $dmarc_status
1863 is a combined value of both the record presence and the result of the
1866 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1868 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1869 dnslookup router and the smtp transport (applying to the forward
1872 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1873 of ldap servers used for a specific lookup. Patch provided by Heiko
1876 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1877 New variable $lookup_dnssec_authenticated for observability.
1879 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1880 Patch submitted by Lars Timman.
1882 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1884 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1885 Requires trusted mode and valid format message id, aborts otherwise.
1886 Patch contributed by Heiko Schlichting.
1888 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1889 certextract with support for various fields. Bug 1358.
1891 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1892 is requested by default, modifiable by smtp transport option
1895 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1896 operate on certificate variables to give certificate fingerprints
1897 Also new ${sha256:cert_variable}.
1899 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1901 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1902 Christian Aistleitner.
1904 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1906 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1907 file. Patch from Wolfgang Breyha.
1909 JH/25 Expand the coverage of the delivery $host and $host_address to
1910 client authenticators run in verify callout. Bug 1476.
1912 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1913 align with daemon_smtp_ports. Bug 72.
1915 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1916 support and error reporting did not work properly.
1918 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1919 and is readable. Patch from Andrew Colin Kissa.
1921 TL/14 Enhance documentation of ${run expansion and how it parses the
1922 commandline after expansion, particularly in the case when an
1923 unquoted variable expansion results in an empty value.
1925 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1927 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1928 by renaming away from it. Addresses GH issue 15, reported by
1931 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1933 TL/15 SECURITY: prevent double expansion in math comparison functions
1934 (can expand unsanitized data). Not remotely exploitable.
1941 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1943 PP/02 Make -n do something, by making it not do something.
1944 When combined with -bP, the name of an option is not output.
1946 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1949 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1950 $sender_host_name and config options to manage this, and basic check
1953 PP/05 DSCP support for outbound connections and control modifier for inbound.
1955 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1956 (Only plugin which currently uses this is kerberos4, which nobody should
1957 be using, but we should make it available and other future plugins might
1958 conceivably use it, even though it would break NAT; stuff *should* be
1959 using channel bindings instead).
1961 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1962 name; added for Sendmail compatibility; requires admin caller.
1963 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1964 just ignore it); requires trusted caller.
1965 Also parse but ignore: -Ac -Am -X<logfile>
1968 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1970 TL/02 Add +smtp_confirmation as a default logging option.
1972 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1973 Patch by Magnus Holmgren from 2007-02-20.
1975 TL/04 Bugzilla 1281 - Spec typo.
1976 Bugzilla 1283 - Spec typo.
1977 Bugzilla 1290 - Spec grammar fixes.
1979 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1981 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1983 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1984 mailing list by by Dmitry Isaikin.
1986 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1988 JH/02 Support "G" suffix to numbers in ${if comparisons.
1990 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1992 NM/01 Bugzilla 1197 - Spec typo
1993 Bugzilla 1196 - Spec examples corrections
1995 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1997 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1998 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2001 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2002 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2004 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2005 "acl {{name}{arg}...}", and optional args on acl condition
2008 JH/05 Permit multiple router/transport headers_add/remove lines.
2010 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2012 JH/07 Avoid using a waiting database for a single-message-only transport.
2013 Performance patch from Paul Fisher. Bugzilla 1262.
2015 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2018 JH/09 Add $headers_added variable, with content from use of ACL modifier
2019 add_header (but not yet added to the message). Bugzilla 199.
2021 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2022 Pulled from Bugzilla 817 by Wolfgang Breyha.
2024 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2026 (nb: this is the same fix as in Exim 4.80.1)
2028 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2031 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2034 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2036 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2037 advertise SMTP AUTH mechanism to us, instead of a generic
2038 protocol violation error. Also, make Exim more robust to bad
2039 data from the Dovecot auth socket.
2041 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2043 When a queue runner is handling a message, Exim first routes the
2044 recipient addresses, during which it prunes them based on the retry
2045 hints database. After that it attempts to deliver the message to
2046 any remaining recipients. It then updates the hints database using
2049 So if a recipient address works intermittently, it can get repeatedly
2050 deferred at routing time. The retry hints record remains fresh so the
2051 address never reaches the final cutoff time.
2053 This is a fairly common occurrence when a user is bumping up against
2054 their storage quota. Exim had some logic in its local delivery code
2055 to deal with this. However it did not apply to per-recipient defers
2056 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2058 This change adds a proper retry rule check during routing so that the
2059 final cutoff time is checked against the message's age. We only do
2060 this check if there is an address retry record and there is not a
2061 domain retry record; this implies that previous attempts to handle
2062 the address had the retry_use_local_parts option turned on. We use
2063 this as an approximation for the destination being like a local
2064 delivery, as in LMTP.
2066 I suspect this new check makes the old local delivery cutoff check
2067 redundant, but I have not verified this so I left the code in place.
2069 TF/02 Correct gecos expansion when From: is a prefix of the username.
2071 Test 0254 submits a message to Exim with the header
2075 When I ran the test suite under the user fanf2, Exim expanded
2076 the header to contain my full name, whereas it should have added
2077 a Resent-Sender: header. It erroneously treats any prefix of the
2078 username as equal to the username.
2080 This change corrects that bug.
2082 GF/01 DCC debug and logging tidyup
2083 Error conditions log to paniclog rather than rejectlog.
2084 Debug lines prefixed by "DCC: " to remove any ambiguity.
2086 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2088 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2089 Bug spotted by Jeremy Harris; was flawed since initial commit.
2090 Would have resulted in OCSP responses post-SNI triggering an Exim
2091 NULL dereference and crash.
2093 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2095 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2096 Bug detection, analysis and fix by Samuel Thibault.
2097 Bugzilla 1331, Debian bug #698092.
2099 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2101 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2102 Server implementation by Todd Lyons, client by JH.
2103 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2104 config variable "prdr_enable" controls whether the server
2105 advertises the facility. If the client requests PRDR a new
2106 acl_data_smtp_prdr ACL is called once for each recipient, after
2107 the body content is received and before the acl_smtp_data ACL.
2108 The client is controlled by both of: a hosts_try_prdr option
2109 on the smtp transport, and the server advertisement.
2110 Default client logging of deliveries and rejections involving
2111 PRDR are flagged with the string "PRDR".
2113 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2114 fclose(). Diagnosis by Todd Lyons.
2116 PP/17 Update configure.default to handle IPv6 localhost better.
2117 Patch by Alain Williams (plus minor tweaks).
2120 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2121 This is now consistent with GnuTLS, and is now documented: the
2122 previous undocumented portable approach to treating the option as
2123 unset was to force an expansion failure. That still works, and
2124 an empty string is now equivalent.
2126 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2127 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2128 not performing validation itself.
2130 PP/20 Added force_command boolean option to pipe transport.
2131 Patch from Nick Koston, of cPanel Inc.
2133 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2136 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2138 PP/21 Fix eximon continuous updating with timestamped log-files.
2139 Broken in a format-string cleanup in 4.80, missed when I repaired the
2140 other false fix of the same issue.
2141 Report and fix from Heiko Schlichting.
2144 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2145 Report from Prashanth Katuri.
2147 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2148 It's SecureTransport, so affects any MacOS clients which use the
2149 system-integrated TLS libraries, including email clients.
2151 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2152 using a MIME ACL for non-SMTP local injection.
2153 Report and assistance in diagnosis by Warren Baker.
2155 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2157 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2159 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2160 last id that failed so it may be referenced in subsequent ACL's.
2162 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2165 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2166 ldap library initialization, allowing self-signed CA's to be
2167 used. Also properly sets require_cert option later in code by
2168 using NULL (global ldap config) instead of ldap handle (per
2169 session). Bug diagnosis and testing by alxgomz.
2171 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2172 the src/util/ subdirectory.
2174 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2175 renamed to Transport Post Delivery Action by Jeremy Harris, as
2178 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2179 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2180 redis_servers = needs to be configured which will be used by the redis
2181 lookup. Patch from Warren Baker, of The Packet Hub.
2183 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2185 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2186 hostname or reverse DNS when processing a host list. Used suggestions
2187 from multiple comments on this bug.
2189 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2191 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2192 Missed a few lines, added it to make the runtest require no keyboard
2195 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2196 contains upper case chars. Make router use caseful_local_part.
2198 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2199 support when GnuTLS has been built with p11-kit.
2205 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2207 This, or similar/improved, will also be change PP/11 of 4.82.
2213 PP/01 Handle short writes when writing local log-files.
2214 In practice, only affects FreeBSD (8 onwards).
2215 Bugzilla 1053, with thanks to Dmitry Isaikin.
2217 NM/01 Bugzilla 949 - Documentation tweak
2219 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2222 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2224 PP/02 Implemented gsasl authenticator.
2226 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2228 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2229 `pkg-config foo` for cflags/libs.
2231 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2232 with rest of GSASL and with heimdal_gssapi.
2234 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2235 `pkg-config foo` for cflags/libs for the TLS implementation.
2237 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2238 properties get this fed in as external SSF. A number of robustness
2239 and debugging improvements to the cyrus_sasl authenticator.
2241 PP/08 cyrus_sasl server now expands the server_realm option.
2243 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2244 Patch by Jeremy Harris.
2246 PP/10 Added dbmjz lookup type.
2248 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2250 PP/12 MAIL args handles TAB as well as SP, for better interop with
2251 non-compliant senders.
2252 Analysis and variant patch by Todd Lyons.
2254 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2255 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2256 Patch from Dirk Mueller <dmueller@suse.com>
2258 PP/13 tls_peerdn now print-escaped for spool files.
2259 Observed some $tls_peerdn in wild which contained \n, which resulted
2260 in spool file corruption.
2262 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2263 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2264 or write after TLS renegotiation, which otherwise led to messages
2267 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2268 as a tracking header (ie: a signed header comes before the signature).
2269 Patch from Wolfgang Breyha.
2271 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2272 comma-sep list; embedded commas doubled.
2274 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2276 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2278 Report and patch from Dmitry Banschikov.
2280 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2281 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2282 failures. We appear to now support TLS1.1+ with Exim.
2284 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2285 lets Exim select keys and certificates based upon TLS SNI from client.
2286 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2287 before an outbound SMTP session. New log_selector, +tls_sni.
2289 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2290 NULL dereference. Report and patch from Alun Jones.
2292 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2293 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2294 Not seeing resolver debug output on NetBSD, but suspect this is a
2295 resolver implementation change.
2297 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2298 Left warnings. Added "eximon gdb" invocation mode.
2300 PP/21 Defaulting "accept_8bitmime" to true, not false.
2302 PP/22 Added -bw for inetd wait mode support.
2304 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2305 locate the relevant includes and libraries. Made this the default.
2307 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2308 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2310 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2311 This may cause build issues on older platforms.
2313 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2314 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2315 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2316 Added SNI support via GnuTLS too.
2317 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2319 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2321 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2322 Applied second patch from Janne, implementing suggestion to default
2323 multiple-strings-in-record handling to match SPF spec.
2325 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2327 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2328 read-only, out of scope).
2329 Patch from Wolfgang Breyha, report from Stuart Northfield.
2331 PP/29 Fix three issues highlighted by clang analyser static analysis.
2332 Only crash-plausible issue would require the Cambridge-specific
2333 iplookup router and a misconfiguration.
2334 Report from Marcin Mirosław.
2336 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2338 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2339 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2340 As part of this, removing so much warning spew let me fix some minor
2341 real issues in debug logging.
2343 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2344 assignment on my part. Fixed.
2346 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2347 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2348 Janne Snabb (who went above and beyond: thank you).
2350 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2351 string otherwise requires a connection and a bunch more work and it's
2352 relatively easy to get wrong. Should also expose TLS library linkage
2355 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2356 64-bit ${eval} (JH/03).
2358 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2359 GNU libc to support some of the 64-bit stuff, should not lead to
2360 conflicts. Defined before os.h is pulled in, so if a given platform
2361 needs to override this, it can.
2363 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2364 protection layer was required, which is not implemented.
2365 Bugzilla 1254, patch from Wolfgang Breyha.
2367 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2368 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2369 tls_dhparam take prime identifiers. Also unbreak combination of
2370 OpenSSL+DH_params+TLSSNI.
2372 PP/39 Disable SSLv2 by default in OpenSSL support.
2378 PP/01 Solaris build fix for Oracle's LDAP libraries.
2379 Bugzilla 1109, patch from Stephen Usher.
2381 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2383 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2386 TF/02 Fix a couple more cases where we did not log the error message
2387 when unlink() failed. See also change 4.74-TF/03.
2389 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2390 lock up or crash if it happened to be inside a call to libc when it
2391 got a SIGUSR1 from exiwhat.
2393 The SIGUSR1 handler appends the current process status to the process
2394 log which is later printed by exiwhat. It used to use the general
2395 purpose logging code to do this, but several functions it calls are
2396 not safe for signals.
2398 The new output code in the SIGUSR1 handler is specific to the process
2399 log, and simple enough that it's easy to inspect for signal safety.
2400 Removing some special cases also simplifies the general logging code.
2401 Removing the spurious timestamps from the process log simplifies
2404 TF/04 Improved ratelimit ACL condition.
2406 The /noupdate option has been deprecated in favour of /readonly which
2407 has clearer semantics. The /leaky, /strict, and /readonly update modes
2408 are mutually exclusive. The update mode is no longer included in the
2409 database key; it just determines when the database is updated. (This
2410 means that when you upgrade Exim will forget old rate measurements.)
2412 Exim now checks that the per_* options are used with an update mode that
2413 makes sense for the current ACL. For example, when Exim is processing a
2414 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2415 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2416 must specify per_mail/readonly. If you omit the update mode it defaults to
2417 /leaky where that makes sense (as before) or /readonly where required.
2419 The /noupdate option is now undocumented but still supported for
2420 backwards compatibility. It is equivalent to /readonly except that in
2421 ACLs where /readonly is required you may specify /leaky/noupdate or
2422 /strict/noupdate which are treated the same as /readonly.
2424 A useful new feature is the /count= option. This is a generalization
2425 of the per_byte option, so that you can measure the throughput of other
2426 aggregate values. For example, the per_byte option is now equivalent
2427 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2429 The per_rcpt option has been generalized using the /count= mechanism
2430 (though it's more complicated than the per_byte equivalence). When it is
2431 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2432 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2433 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2434 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2435 Note that using per_rcpt with a non-readonly update mode in more than
2436 one ACL will cause the recipients to be double-counted. (The per_mail
2437 and per_byte options don't have this problem.)
2439 The handling of very low rates has changed slightly. If the computed rate
2440 is less than the event's count (usually one) then this event is the first
2441 after a long gap. In this case the rate is set to the same as this event's
2442 count, so that the first message of a spam run is counted properly.
2444 The major new feature is a mechanism for counting the rate of unique
2445 events. The new per_addr option counts the number of different
2446 recipients that someone has sent messages to in the last time period. It
2447 behaves like per_rcpt if all the recipient addresses are different, but
2448 duplicate recipient addresses do not increase the measured rate. Like
2449 the /count= option this is a general mechanism, so the per_addr option
2450 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2451 example, measure the rate that a client uses different sender addresses
2452 with the options per_mail/unique=$sender_address. There are further
2453 details in the main documentation.
2455 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2457 TF/06 Removed a few PCRE remnants.
2459 TF/07 Automatically extract Exim's version number from tags in the git
2460 repository when doing development or release builds.
2462 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2463 Bugzilla 879. Patch from Paul Fisher.
2465 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2466 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2469 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2471 PP/05 Variable $av_failed, true if the AV scanner deferred.
2472 Bugzilla 1078. Patch from John Horne.
2474 PP/06 Stop make process more reliably on build failure.
2475 Bugzilla 1087. Patch from Heiko Schlittermann.
2477 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2478 Bugzilla 1089. Patch from Heiko Schlittermann.
2480 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2481 Bugzilla 1131. Patch from Holger Weiß.
2483 PP/09 Handle IPv6 addresses with SPF.
2484 Bugzilla 860. Patch from Wolfgang Breyha.
2486 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2488 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2491 PP/11 match_* no longer expand right-hand-side by default.
2492 New compile-time build option, EXPAND_LISTMATCH_RHS.
2493 New expansion conditions, "inlist", "inlisti".
2495 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2497 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2499 PP/14 fix log_write() format string regression from TF/03.
2500 Bugzilla 1152. Patch from Dmitry Isaikin.
2506 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2508 PP/02 Harmonised TLS library version reporting; only show if debugging.
2509 Layout now matches that introduced for other libraries in 4.74 PP/03.
2511 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2513 PP/04 New "dns_use_edns0" global option.
2515 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2518 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2519 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2521 TK/01 Updated PolarSSL code to 0.14.2.
2522 Bugzilla 1097. Patch from Andreas Metzler.
2524 PP/07 Catch divide-by-zero in ${eval:...}.
2525 Fixes bugzilla 1102.
2527 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2530 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2531 format-string attack -- SECURITY: remote arbitrary code execution.
2533 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2534 time unintentionally subject to list matching rules, letting the header
2535 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2536 arbitrary string expansion). This allowed for information disclosure.
2538 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2539 INT_MIN/-1 -- value coerced to INT_MAX.
2545 NM/01 Workaround for PCRE version dependency in version reporting
2548 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2549 This fixes portability to compilers other than gcc, notably
2550 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2552 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2553 makefiles for portability to HP-UX and POSIX correctness.
2555 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2556 Also via indented variable definition in the Makefile.
2557 (Debugging by Oliver Heesakkers).
2559 PP/02 Restore caching of spamd results with expanded spamd_address.
2560 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2562 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2563 Improves build reliability. Fix from: Frank Elsner
2565 NM/02 Fix wide character breakage in the rfc2047 coding
2566 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2568 NM/03 Allow underscore in dnslist lookups
2569 Fixes bug 1026. Patch from Graeme Fowler
2571 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2572 Code patches from Adam Ciarcinski of NetBSD.
2574 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2577 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2578 is logged, to avoid truncation. Patch from John Horne.
2580 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2581 Patch from Jakob Hirsch.
2583 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2584 SQL string expansion failure details.
2585 Patch from Andrey Oktyabrski.
2587 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2588 Patch from Simon Arlott.
2590 PP/09 New lookups functionality failed to compile on old gcc which rejects
2591 extern declarations in function scope.
2592 Patch from Oliver Fleischmann
2594 PP/10 Use sig_atomic_t for flags set from signal handlers.
2595 Check getgroups() return and improve debugging.
2596 Fixed developed for diagnosis in bug 927 (which turned out to be
2599 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2600 Patch from Mark Zealey.
2602 PP/12 Bugzilla 1056: Improved spamd server selection.
2603 Patch from Mark Zealey.
2605 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2606 Based on patch from Heiko Schlittermann.
2608 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2609 Patch from Uwe Doering, sign-off by Michael Haardt.
2611 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2612 variable declaration deep within a block. Bug and patch from
2615 PP/15 lookups-Makefile IRIX compatibility coercion.
2617 PP/16 Make DISABLE_DKIM build knob functional.
2619 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2620 Patch by Simon Arlott
2622 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2623 variable argument macros. Our copy now differs from upstream.
2629 TF/01 Failure to get a lock on a hints database can have serious
2630 consequences so log it to the panic log.
2632 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2633 controlled using the smtp_confirmation log selector.
2635 TF/03 Include the error message when we fail to unlink a spool file.
2637 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2638 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2639 for maintaining out-of-tree patches for some time.
2641 PP/01 Bugzilla 139: Documentation and portability issues.
2642 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2643 Handle per-OS dynamic-module compilation flags.
2645 PP/02 Let /dev/null have normal permissions.
2646 The 4.73 fixes were a little too stringent and complained about the
2647 permissions on /dev/null. Exempt it from some checks.
2648 Reported by Andreas M. Kirchwitz.
2650 PP/03 Report version information for many libraries, including
2651 Exim version information for dynamically loaded libraries. Created
2652 version.h, now support a version extension string for distributors
2653 who patch heavily. Dynamic module ABI change.
2655 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2656 privilege escalation vulnerability whereby the Exim run-time user
2657 can cause root to append content of the attacker's choosing to
2660 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2663 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2664 If dropping privileges for untrusted macros, we disabled normal logging
2665 on the basis that it would fail; for the Exim run-time user, this is not
2666 the case, and it resulted in successful deliveries going unlogged.
2667 Fixed. Reported by Andreas Metzler.
2673 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2674 only prepend for the Resent-* case. Fixes regression introduced in
2675 Exim 4.70 by NM/22 for Bugzilla 607.
2677 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2678 increasing numbers of administrators be bitten by this.
2680 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2682 PP/03 Bugzilla 994: added openssl_options main configuration option.
2684 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2686 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2688 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2690 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2691 without a peer certificate, leading to a segfault because of an
2692 assumption that peers always have certificates. Be a little more
2693 paranoid. Problem reported by Martin Tscholak.
2695 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2696 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2697 NB: ClamAV planning to remove STREAM in "middle of 2010".
2698 CL also introduces -bmalware, various -d+acl logging additions and
2699 more caution in buffer sizes.
2701 PP/09 Implemented reverse_ip expansion operator.
2703 PP/10 Bugzilla 937: provide a "debug" ACL control.
2705 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2707 PP/12 Bugzilla 973: Implement --version.
2709 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2711 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2713 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2715 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2716 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2717 ignore trailing whitespace.
2719 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2721 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2724 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2725 Notification from Dr Andrew Aitchison.
2727 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2728 ExtendedDetectionInfo response format.
2729 Notification from John Horne.
2731 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2734 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2735 XSL and documented dependency on system catalogs, with examples of how
2738 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2741 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2742 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2743 configuration file which is writeable by the Exim user or group.
2745 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2746 of configuration files to cover files specified with the -C option if
2747 they are going to be used with root privileges, not just the default
2750 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2751 option (effectively making it always true).
2753 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2754 files to be used while preserving root privileges.
2756 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2757 that rogue child processes cannot use them.
2759 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2760 run-time user, instead of root.
2762 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2763 Exim run-time user without dropping privileges.
2765 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2766 result string, instead of calling string_vformat() twice with the same
2769 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2770 for other users. Others should always drop root privileges if they use
2771 -C on the command line, even for a whitelisted configure file.
2773 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2775 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2781 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2782 $data_path, and $header_path variables; fixed documentation bugs and
2785 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2786 exipick to access non-standard spools, including the "frozen" queue
2789 NM/01 Bugzilla 965: Support mysql stored procedures.
2790 Patch from Alain Williams
2792 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2794 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2795 Patch from Andreas Metzler
2797 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2798 Patch from Kirill Miazine
2800 NM/05 Bugzilla 671: Added umask to procmail example.
2802 JJ/03 installed exipick 20100323.0, fixing doc bug
2804 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2805 directory. Notification and patch from Dan Rosenberg.
2807 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2809 TK/02 Improve log output when DKIM signing operation fails.
2811 MH/01 Treat the transport option dkim_domain as a colon separated
2812 list, not as a single string, and sign the message with each element,
2813 omitting multiple occurences of the same signer.
2815 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2816 Bugzilla 985, 986. Patch by Simon Arlott
2818 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2819 Patch by Simon Arlott
2821 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2822 MBX locking. Notification from Dan Rosenberg.
2828 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2830 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2832 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2834 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2836 NM/04 Bugzilla 915: Flag broken perl installation during build.
2842 TK/01 Added patch by Johannes Berg that expands the main option
2843 "spamd_address" if it starts with a dollar sign.
2845 TK/02 Write list of recipients to X-Envelope-Sender header when building
2846 the mbox-format spool file for content scanning (suggested by Jakob
2849 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2850 (http://www.dcc-servers.net/) support via dccifd. Activated by
2851 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2853 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2854 by Mark Daniel Reidel <mr@df.eu>.
2856 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2857 When building exim an external PCRE library is now needed -
2858 PCRE is a system library on the majority of modern systems.
2859 See entry on PCRE_LIBS in EDITME file.
2861 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2862 conversation. Added nologin parameter to request.
2863 Patch contributed by Kirill Miazine.
2865 TF/01 Do not log submission mode rewrites if they do not change the address.
2867 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2869 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2870 log files in place. Contributed by Roberto Lima.
2872 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2874 TF/03 Bugzilla 615: When checking the local_parts router precondition
2875 after a local_part_suffix or local_part_prefix option, Exim now
2876 does not use the address's named list lookup cache, since this
2877 contains cached lookups for the whole local part.
2879 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2880 Robert Millan. Documentation is in experimental-spec.txt.
2882 TF/04 Bugzilla 668: Fix parallel build (make -j).
2884 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2886 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2887 Patch provided by Jan Srzednicki.
2889 TF/05 Leading white space used to be stripped from $spam_report which
2890 wrecked the formatting. Now it is preserved.
2892 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2893 that they are available at delivery time.
2895 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2897 TF/08 TLS error reporting now respects the incoming_interface and
2898 incoming_port log selectors.
2900 TF/09 Produce a more useful error message if an SMTP transport's hosts
2901 setting expands to an empty string.
2903 NM/06 Bugzilla 744: EXPN did not work under TLS.
2904 Patch provided by Phil Pennock.
2906 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2907 Patch provided by Richard Godbee.
2909 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2910 acl_smtp_notquit, added index entry.
2912 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2913 Patch provided by Eugene Bujak.
2915 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2916 accept(). Patch provided by Maxim Dounin.
2918 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2919 Patch provided by Phil Pennock.
2921 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2923 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2924 Patch provided by Brad "anomie" Jorsch.
2926 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2927 Patch provided by Dean Brooks.
2929 TK/05 Add native DKIM support (does not depend on external libraries).
2931 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2932 Patch provided by Graeme Fowler.
2934 NM/16 Bugzilla 851: Documentation example syntax fix.
2936 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2938 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2941 NM/19 Bugzilla 745: TLS version reporting.
2942 Patch provided by Phil Pennock.
2944 NM/20 Bugzilla 167: bool: condition support.
2945 Patch provided by Phil Pennock.
2947 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2948 clients. Patch provided by Phil Pennock.
2950 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2951 Patch provided by Brad "anomie" Jorsch.
2953 NM/23 Bugzilla 687: Fix misparses in eximstats.
2954 Patch provided by Heiko Schlittermann.
2956 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2957 Patch provided by Heiko Schlittermann.
2959 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2960 plus update to original patch.
2962 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2964 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2965 Patch provided by David Brownlee.
2967 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2969 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2971 NM/30 Bugzilla 888: TLS documentation bugfixes.
2973 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2975 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2976 Unlike the original bugzilla I have changed all shell scripts in src tree.
2978 NM/33 Bugzilla 898: Transport filter timeout fix.
2979 Patch by Todd Rinaldo.
2981 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2982 Patch by Serge Demonchaux.
2984 NM/35 Bugzilla 39: Base64 decode bug fixes.
2985 Patch by Jakob Hirsch.
2987 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2989 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2991 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2993 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2999 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3000 ALT-N's libdkim that I have put here:
3001 http://duncanthrax.net/exim-experimental/
3003 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3004 were called 'true' and it seems that C99 defines that as a reserved
3005 keyword to be used with 'bool' variable types. That means you could
3006 not include C99-style headers which use bools without triggering
3007 build errors in sieve.c.
3009 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3010 as mailq or other aliases. Changed the --help handling significantly
3011 to do whats expected. exim_usage() emits usage/help information.
3013 SC/01 Added the -bylocaldomain option to eximstats.
3015 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3017 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3019 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3025 PH/01 Another patch from the Sieve maintainer.
3027 PH/02 When an IPv6 address is converted to a string for single-key lookup
3028 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3029 dots are used instead of colons so that keys in lsearch files need not
3030 contain colons. This was done some time before quoting was made available
3031 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3032 (notated using the quote facility) so as to distinguish them from IPv4
3033 keys. This meant that lookups for IP addresses in host lists did not work
3034 for iplsearch lookups.
3036 This has been fixed by arranging for IPv6 addresses to be expressed with
3037 colons if the lookup type is iplsearch. This is not incompatible, because
3038 previously such lookups could never work.
3040 The situation is now rather anomalous, since one *can* have colons in
3041 ordinary lsearch keys. However, making the change in all cases is
3042 incompatible and would probably break a number of configurations.
3044 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3047 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3048 conversion specification without a maximum field width, thereby enabling
3049 a rogue spamd server to cause a buffer overflow. While nobody in their
3050 right mind would setup Exim to query an untrusted spamd server, an
3051 attacker that gains access to a server running spamd could potentially
3052 exploit this vulnerability to run arbitrary code as the Exim user.
3054 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3055 $primary_hostname instead of what libspf2 thinks the hosts name is.
3057 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3058 a directory entry by the name of the lookup key. Previously, if a
3059 symlink pointed to a non-existing file or a file in a directory that
3060 Exim lacked permissions to read, a lookup for a key matching that
3061 symlink would fail. Now it is enough that a matching directory entry
3062 exists, symlink or not. (Bugzilla 503.)
3064 PH/03 The body_linecount and body_zerocount variables are now exported in the
3067 PH/04 Added the $dnslist_matched variable.
3069 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3070 This means they are set thereafter only if the connection becomes
3073 PH/06 Added the client_condition to authenticators so that some can be skipped
3074 by clients under certain conditions.
3076 PH/07 The error message for a badly-placed control=no_multiline_responses left
3077 "_responses" off the end of the name.
3079 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3081 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3082 (without spaces) instead of just copying the configuration text.
3084 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3086 PH/11 Added $max_received_linelength.
3088 PH/12 Added +ignore_defer and +include_defer to host lists.
3090 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3091 way in which PCRE > 7.0 is built.
3093 PH/14 Implemented queue_only_load_latch.
3095 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3096 MAIL command. The effect was to mangle the value on 64-bit systems.
3098 PH/16 Another patch from the Sieve maintainer.
3100 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3102 PH/18 If a system quota error occurred while trying to create the file for
3103 a maildir delivery, the message "Mailbox is full" was not appended to the
3104 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3105 only to a quota excession during the actual writing of the file.
3107 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3108 characters?) which causes problems in log lines. The DN values are now
3109 passed through string_printing() before being added to log lines.
3111 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3112 and InterBase are left for another time.)
3114 PH/21 Added message_body_newlines option.
3116 PH/22 Guard against possible overflow in moan_check_errorcopy().
3118 PH/23 POSIX allows open() to be a macro; guard against that.
3120 PH/24 If the recipient of an error message contained an @ in the local part
3121 (suitably quoted, of course), incorrect values were put in $domain and
3122 $local_part during the evaluation of errors_copy.
3128 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3129 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3132 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3133 issue a MAIL command.
3135 PH/02 In an ACL statement such as
3137 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3139 if a client was not listed at all, or was listed with a value other than
3140 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3141 the condition was not true (as it should be), so access was not denied.
3142 The bug was that the ! inversion was incorrectly passed on to the second
3143 item. This has been fixed.
3145 PH/03 Added additional dnslists conditions == and =& which are different from
3146 = and & when the dns lookup returns more than one IP address.
3148 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3149 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3151 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3152 FSYNC, which compiles an option called disable_fsync that allows for
3153 bypassing fsync(). The documentation is heavily laced with warnings.
3155 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3157 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3158 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3159 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3160 including adding "make clean"; (3) Added -fPIC when compiling the test
3161 dynamically loaded module, to get rid of a warning.
3163 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3164 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3165 = 0s. The bug is otherwise harmless.
3167 PH/07 There was a bug in the dovecot authenticator such that the value of
3168 $auth1 could be overwritten, and so not correctly preserved, after a
3169 successful authentication. This usually meant that the value preserved by
3170 the server_setid option was incorrect.
3172 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3174 PH/09 Installed PCRE release 7.0.
3176 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3177 run for batched SMTP input. It is now run at the start of every message
3178 in the batch. While fixing this I discovered that the process information
3179 (output by running exiwhat) was not always getting set for -bs and -bS
3180 input. This is fixed, and it now also says "batched" for BSMTP.
3182 PH/11 Added control=no_pipelining.
3184 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3185 patch, slightly modified), and move the expansion of helo_data till after
3186 the connection is made in the smtp transport (so it can use these
3189 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3191 PH/14 Added log_selector = +pid.
3193 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3195 PH/16 Add ${if forany and ${if forall.
3197 PH/17 Added dsn_from option to vary the From: line in DSNs.
3199 PH/18 Flush SMTP output before performing a callout, unless control =
3200 no_callout_flush is set.
3202 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3203 was true (the default) a successful delivery failed to delete the retry
3204 item, thus causing premature timeout of the address. The bug is now
3207 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3209 PH/21 Long custom messages for fakedefer and fakereject are now split up
3210 into multiline responses in the same way that messages for "deny" and
3211 other ACL rejections are.
3213 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3214 with slight modification.
3216 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3217 draft, changing the syntax and factoring some duplicate code".
3219 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3220 for deliveries of the second and subsequent messages over the same SMTP
3223 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3224 ${reduce, with only minor "tidies".
3226 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3228 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3229 expansion side effects.
3231 PH/27 When a message times out after an over-quota error from an Exim-imposed
3232 quota, the bounce message says "mailbox is full". This message was not
3233 being given when it was a system quota that was exceeded. It now should
3236 MH/03 Made $recipients available in local_scan(). local_scan() already has
3237 better access to the recipient list through recipients_list[], but
3238 $recipients can be useful in postmaster-provided expansion strings.
3240 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3241 in the case of a MAIL command with additional options following the
3242 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3243 were accidentally chopped off.
3245 PH/29 SMTP synchronization checks are implemented when a command is read -
3246 there is a check that no more input is waiting when there shouldn't be
3247 any. However, for some commands, a delay in an ACL can mean that it is
3248 some time before the response is written. In this time, more input might
3249 arrive, invalidly. So now there are extra checks after an ACL has run for
3250 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3251 pipelining has not been advertised.
3253 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3255 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3256 returned in the SMTP response when smtp_return_error_details was false.
3257 This has been fixed.
3259 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3260 instead of the C I/O that was originally supplied, because problems were
3261 reported on Solaris.
3263 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3264 Exim which did not show up earlier: it was assuming that a call to
3265 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3266 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3267 was a macro that became an assignment, so it seemed to work. This has
3268 changed to a proper function call with a void return, hence the compile
3269 error. Exim's code has been fixed.
3271 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3274 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3276 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3278 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3279 because it turns out to be too big or there is a timeout) there is no
3280 "Completed" line in the log. When some messages of this type were
3281 selected by exigrep, they were listed as "not completed". Others were
3282 picked up by some special patterns. I have improved the selection
3283 criteria to be more general.
3285 PH/38 The host_find_failed option in the manualroute router can now be set
3286 to "ignore", to completely ignore a host whose IP address cannot be
3287 found. If all hosts are ignored, the behaviour is controlled by the new
3288 host_all_ignored option.
3290 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3291 homing or because of multiple MX records with /mx) generated more than
3292 one IP address, and the following item turned out to be the local host,
3293 all the secondary addresses of the first item were incorrectly removed
3294 from the list, along with the local host and any following hosts (which
3295 is what is supposed to happen).
3297 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3298 whoever called Exim into the -H file. In the case of the daemon it was
3299 behaving confusingly. When first started, it used values for whoever
3300 started the daemon, but after a SIGHUP it used the Exim user (because it
3301 calls itself on a restart). I have changed the code so that it now always
3304 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3305 message are rejected with the same error (e.g. no authentication or bad
3306 sender address), and a DATA command is nevertheless sent (as can happen
3307 with PIPELINING or a stupid MUA), the error message that was given to the
3308 RCPT commands is included in the rejection of the DATA command. This is
3309 intended to be helpful for MUAs that show only the final error to their
3312 PH/42 Another patch from the Sieve maintainer.
3314 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3315 Eximstats - Fixed some broken HTML links and added missing column headers
3317 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3318 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3320 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3322 PH/43 Yet another patch from the Sieve maintainer.
3324 PH/44 I found a way to check for a TCP/IP connection going away before sending
3325 the response to the final '.' that terminates a message, but only in the
3326 case where the client has not sent further data following the '.'
3327 (unfortunately, this is allowed). However, in many cases there won't be
3328 any further data because there won't be any more messages to send. A call
3329 to select() can be used: if it shows that the input is "ready", there is
3330 either input waiting, or the socket has been closed. An attempt to read
3331 the next input character can distinguish the two cases. Previously, Exim
3332 would have sent an OK response which the client would never have see.
3333 This could lead to message repetition. This fix should cure that, at
3334 least in a lot of common cases.
3336 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3337 advertised in response to EHLO.
3343 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3344 fixed by 4.65/MH/01 (is this a record?) are fixed:
3346 (i) An empty string was always treated as zero by the numeric comparison
3347 operators. This behaviour has been restored.
3349 (ii) It is documented that the numeric comparison operators always treat
3350 their arguments as decimal numbers. This was broken in that numbers
3351 starting with 0 were being interpreted as octal.
3353 While fixing these problems I realized that there was another issue that
3354 hadn't been noticed. Values of message_size_limit (both the global option
3355 and the transport option) were treated as octal if they started with 0.
3356 The documentation was vague. These values are now always treated as
3357 decimal, and I will make that clear in the documentation.
3363 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3364 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3367 MH/01 Don't check that the operands of numeric comparison operators are
3368 integers when their expansion is in "skipping" mode (fixes bug
3369 introduced by 4.64-PH/07).
3371 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3372 child addresses, Exim now panics and dies. Previously, because the count
3373 is held in a short int, deliveries were likely to be lost. As such a
3374 large number of recipients for a single message is ridiculous
3375 (performance will be very, very poor), I have chosen to impose a limit
3376 rather than extend the field.
3382 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3383 leftover -K file (the existence of which was triggered by #402).
3384 While we were at it, introduced process PID as part of the -K
3385 filename. This should rule out race conditions when creating
3388 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3389 processing considerably. Previous code took too long for large mails,
3390 triggering a timeout which in turn triggers #401.
3392 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3393 in the DK code in transports.c. sendfile() is not really portable,
3394 hence the _LINUX specificness.
3396 TF/01 In the add_headers option to the mail command in an Exim filter,
3397 there was a bug that Exim would claim a syntax error in any
3398 header after the first one which had an odd number of characters
3401 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3402 callout verification, Exim cached a "reject" for the entire domain. This
3403 is correct for most verifications, but it is not correct for a recipient
3404 verification with use_sender or use_postmaster set, because in that case
3405 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3406 case of MAIL FROM:<> rejection from other early rejections (e.g.
3407 rejection of HELO). When verifying a recipient using a non-null MAIL
3408 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3409 Whatever the result of the callout, the value of the domain cache is
3410 left unchanged (for any other kind of callout, getting as far as trying
3411 RCPT means that the domain itself is ok).
3413 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3416 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3417 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3418 session, the daemon ignores ECONNECT errors and logs others; it now
3419 ignores EPIPE as well.
3421 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3422 (quoted-printable decoding).
3424 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3425 later the small subsequent patch to fix an introduced bug.
3427 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3429 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3431 PH/08 An error is now given if message_size_limit is specified negative.
3433 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3434 to be given (somewhat) arbitrary names.
3436 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3439 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3440 miscellaneous code fixes
3442 PH/10 Added the log_reject_target ACL modifier to specify where to log
3445 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3446 hostname. This is wrong, because it relates to the incoming message (and
3447 probably the interface on which it is arriving) and not to the outgoing
3448 callout (which could be using a different interface). This has been
3449 changed to use the value of the helo_data option from the smtp transport
3450 instead - this is what is used when a message is actually being sent. If
3451 there is no remote transport (possible with a router that sets up host
3452 addresses), $smtp_active_hostname is used.
3454 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3455 tweaks were necessary in order to get it to work (see also 21 below):
3456 (a) The code assumed that strncpy() returns a negative number on buffer
3457 overflow, which isn't the case. Replaced with Exim's string_format()
3459 (b) There were several signed/unsigned issues. I just did the minimum
3460 hacking in of casts. There is scope for a larger refactoring.
3461 (c) The code used strcasecmp() which is not a standard C function.
3462 Replaced with Exim's strcmpic() function.
3463 (d) The code set only $1; it now sets $auth1 as well.
3464 (e) A simple test gave the error "authentication client didn't specify
3465 service in request". It would seem that Dovecot has changed its
3466 interface. Fortunately there's a specification; I followed it and
3467 changed what the client sends and it appears to be working now.
3469 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3472 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3473 address A is aliased to B and C, where B exists and C does not. Without
3474 -v the output is "A verified" because verification stops after a
3475 successful redirection if more than one address is generated. However,
3476 with -v the child addresses are also verified. Exim was outputting "A
3477 failed to verify" and then showing the successful verification for C,
3478 with its parentage. It now outputs "B failed to verify", showing B's
3479 parentage before showing the successful verification of C.
3481 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3482 look up a TXT record in a specific list after matching in a combined
3485 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3486 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3487 they consult the DNS. I had assumed they would set it the way they
3488 wanted; and indeed my experiments on Linux seem to show that in some
3489 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3490 To be on the safe side, however, I have now made the interface to
3491 host_find_byname() similar to host_find_bydns(), with an argument
3492 containing the DNS resolver options. The host_find_byname() function now
3493 sets these options at its start, just as host_find_bydns() does. The smtp
3494 transport options dns_qualify_single and dns_search_parents are passed to
3495 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3496 of host_find_byname() use the default settings of RES_DEFNAMES
3497 (qualify_single) but not RES_DNSRCH (search_parents).
3499 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3500 spool_read_header() do less string testing, by means of a preliminary
3501 switch on the second character of optional "-foo" lines. (This is
3502 overdue, caused by the large number of possibilities that now exist.
3503 Originally there were few.) While I was there, I also converted the
3504 str(n)cmp tests so they don't re-test the leading "-" and the first
3505 character, in the hope this might squeeze out yet more improvement.
3507 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3508 flag allowing group syntax was set by the header_syntax check but not
3509 turned off, possible causing trouble later; (2) The flag was not being
3510 set at all for the header_verify test, causing "group"-style headers to
3511 be rejected. I have now set it in this case, and also caused header_
3512 verify to ignore an empty address taken from a group. While doing this, I
3513 came across some other cases where the code for allowing group syntax
3514 while scanning a header line wasn't quite right (mostly, not resetting
3515 the flag correctly in the right place). These bugs could have caused
3516 trouble for malformed header lines. I hope it is now all correct.
3518 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3519 with the "reply" argument non-NULL. The code, however (which originally
3520 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3521 but it didn't always do it. This confused somebody who was copying the
3522 code for some other use. I have removed all the tests.
3524 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3525 feature that was used to support insecure browsers during the U.S. crypto
3526 embargo. It requires special client support, and Exim is probably the
3527 only MTA that supported it -- and would never use it because real RSA is
3528 always available. This code has been removed, because it had the bad
3529 effect of slowing Exim down by computing (never used) parameters for the
3530 RSA_EXPORT functionality.
3532 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3533 authenticator to fail if there's a tab character in the incoming data
3534 (there should never be unless someone is messing about, as it's supposed
3535 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3536 if the connection is using TLS or if the remote IP is the same as the
3537 local IP, and the "valid-client-cert option" if a client certificate has
3540 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3541 authenticators. This can be used for authorization after authentication
3542 succeeds. (In the case of plaintext, it servers for both authentication
3545 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3546 if any retry times were supplied.
3548 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3549 connection, where there is no client IP address to check. In this
3550 situation, the verify now always succeeds.
3552 PH/25 Applied John Jetmore's -Mset patch.
3554 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3556 PH/27 In a string expansion for a processed (not raw) header when multiple
3557 headers of the same name were present, leading whitespace was being
3558 removed from all of them, but trailing whitespace was being removed only
3559 from the last one. Now trailing whitespace is removed from each header
3560 before concatenation. Completely empty headers in a concatenation (as
3561 before) are ignored.
3563 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3564 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3566 PH/29 [Removed. This was a change that I later backed out, and forgot to
3567 correct the ChangeLog entry (that I had efficiently created) before
3568 committing the later change.]
3570 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3571 address errors (4xx response to RCPT) over the same connection as other
3572 messages routed to the same hosts. Such deliveries are always "forced",
3573 so retry times are not inspected. This resulted in far too many retries
3574 for the affected addresses. The effect occurred only when there were more
3575 hosts than the hosts_max_try setting in the smtp transport when it had
3576 the 4xx errors. Those hosts that it had tried were not added to the list
3577 of hosts for which the message was waiting, so if all were tried, there
3578 was no problem. Two fixes have been applied:
3580 (i) If there are any address or message errors in an SMTP delivery, none
3581 of the hosts (tried or untried) are now added to the list of hosts
3582 for which the message is waiting, so the message should not be a
3583 candidate for sending over the same connection that was used for a
3584 successful delivery of some other message. This seems entirely
3585 reasonable: after all the message is NOT "waiting for some host".
3586 This is so "obvious" that I'm not sure why it wasn't done
3587 previously. Hope I haven't missed anything, but it can't do any
3588 harm, as the worst effect is to miss an optimization.
3590 (ii) If, despite (i), such a delivery is accidentally attempted, the
3591 routing retry time is respected, so at least it doesn't keep
3592 hammering the server.
3594 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3595 in ${readsocket because some servers need this prod.
3597 PH/32 Added some extra debug output when updating a wait-xxx database.
3599 PH/33 The hint "could be header name not terminated by colon", which has been
3600 given for certain expansion errors for a long time, was not being given
3601 for the ${if def:h_colon_omitted{... case.
3603 PH/34 The spec says: "With one important exception, whenever a domain list is
3604 being scanned, $domain contains the subject domain." There was at least
3605 one case where this was not true.
3607 PH/35 The error "getsockname() failed: connection reset by peer" was being
3608 written to the panic log as well as the main log, but it isn't really
3609 panic-worthy as it just means the connection died rather early on. I have
3610 removed the panic log writing for the ECONNRESET error when getsockname()
3613 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3614 runs only) independently of the message's sender address. This meant
3615 that, if the 4xx error was in fact related to the sender, a different
3616 message to the same recipient with a different sender could confuse
3617 things. In particular, this can happen when sending to a greylisting
3618 server, but other circumstances could also provoke similar problems.
3619 I have changed the default so that the retry time for these errors is now
3620 based a combination of the sender and recipient addresses. This change
3621 can be overridden by setting address_retry_include_sender=false in the
3624 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3625 remote server are returned as part of bounce messages. This was not
3626 happening for LMTP over a pipe (the lmtp transport), but now it is the
3627 same for both kinds of LMTP.
3629 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3630 in header lines that were in fact CNAMEs. This is no longer the case.
3632 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3633 and queue runs started by the daemon processed all messages. This has
3634 been fixed so that -R and -S can now usefully be given with -q<time>.
3636 PH/40 Import PCRE release 6.7 (fixes some bugs).
3638 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3640 PH/42 Give an error if -q is specified more than once.
3642 PH/43 Renamed the variables $interface_address and $interface_port as
3643 $received_ip_address and $received_port, to make it clear that these
3644 values apply to message reception, and not to the outgoing interface when
3645 a message is delivered. (The old names remain recognized, of course.)
3647 PH/44 There was no timeout on the connect() call when using a Unix domain
3648 socket in the ${readsocket expansion. There now is.
3650 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3651 be meaningful with "accept".
3653 SC/01 Eximstats V1.43
3654 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3656 SC/02 Eximstats V1.44
3657 Use a glob alias rather than an array ref in the generated
3658 parser. This improves both readability and performance.
3660 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3661 Collect SpamAssassin and rejection statistics.
3662 Don't display local sender or destination tables unless
3663 there is data to show.
3664 Added average volumes into the top table text output.
3666 SC/04 Eximstats V1.46
3667 Collect data on the number of addresses (recipients)
3668 as well as the number of messages.
3670 SC/05 Eximstats V1.47
3671 Added 'Message too big' to the list of mail rejection
3672 reasons (thanks to Marco Gaiarin).
3674 SC/06 Eximstats V1.48
3675 Mainlog lines which have GMT offsets and are too short to
3676 have a flag are now skipped.
3678 SC/07 Eximstats V1.49 (Alain Williams)
3679 Added the -emptyok flag.
3681 SC/08 Eximstats V1.50
3682 Fixes for obtaining the IP address from reject messages.
3684 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3685 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3686 whitespace changes from 4.64-PH/27
3688 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3691 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3692 are found, allow negative numbers in numeric criteria)
3694 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3696 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3697 to match changes made in 4.64-PH/43
3699 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3701 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3702 "domain" is actually an IP address, and force a failure. This locks out
3703 those revolvers/nameservers that support "A-for-A" lookups, in
3704 contravention of the specifications.
3706 PH/48 When a host name was looked up from an IP address, and the subsequent
3707 forward lookup of the name timed out, the host name was left in
3708 $sender_host_name, contrary to the specification.
3710 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3711 restricted to single-key lookups, Exim was not diagnosing an error if
3712 * or *@ was used with a query-style lookup.
3714 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3716 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3717 long ago, but noone interested enough thought of it. Let's just say that
3718 the "1.1" means that there are some new functions that weren't there at
3719 some point in the past.
3721 PH/51 Error processing for expansion failure of helo_data from an smtp
3722 transport during callout processing was broken.
3724 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3725 tested/used via the -bh/-bhc/-bs options.
3727 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3728 bug, fixed in subsequent PCRE releases).
3730 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3731 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3733 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3739 SC/01 Use a glob alias rather than an array ref in eximstats generated
3740 parser. This improves both readability and performance.
3742 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3743 Don't display local sender or destination tables in eximstats unless
3744 there is data to show.
3745 Added average volumes into the eximstats top table text output.
3747 SC/03 Collect data on the number of addresses (recipients) as well
3748 as the number of messages in eximstats.
3750 TF/01 Correct an error in the documentation for the redirect router. Exim
3751 does (usually) call initgroups() when daemonizing.
3753 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3754 with consistent privilege compared to when running as a daemon.
3756 TF/03 Note in the spec that $authenticated_id is not set for local
3757 submissions from trusted users.
3759 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3760 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3762 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3763 by adding some example configuration directives to the default
3764 configuration file. A little bit of work is required to uncomment the
3765 directives and define how usernames and passwords are checked, but
3766 there is now a framework to start from.
3768 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3769 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3770 without this. I don't know how relevant this is to other LDAP libraries.
3772 PH/02 Add the verb name to the "unknown ACL verb" error.
3774 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3776 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3778 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3779 directory not expanded when it should be if an expanded home directory
3780 was set for the address (which is overridden by the transport).
3782 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3785 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3786 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3787 because it is too late at that time, and has no effect.
3789 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3790 security issue with \' (bugzilla #107). I could not use the
3791 PQescapeStringConn() function, because it needs a PGconn value as one of
3794 PH/08 When testing addresses using -bt, indicate those final addresses that
3795 are duplicates that would not cause an additional delivery. At least one
3796 person was confused, thinking that -bt output corresponded to deliveries.
3797 (Suppressing duplicates isn't a good idea as you lose the information
3798 about possibly different redirections that led to the duplicates.)
3800 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3801 systems where poll() doesn't work, in particular OS X.
3803 PH/10 Added more information to debugging output for retry time not reached.
3805 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3806 operations in malware.c.
3808 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3811 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3812 syslog_duplication set false, log lines that would normally be written
3813 both the the main log and to the reject log were not written to syslog at
3816 PH/14 In the default configuration, change the use of "message" in ACL warn
3817 statements to "add_header".
3819 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3820 not followed by a command (e.g. "seen endif").
3822 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3823 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3826 PH/17 Added extra conditions to the default value of delay_warning_condition
3830 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3831 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3832 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3835 The Auto-Submitted: and various List- headers are standardised, whereas I
3836 don't think Precedence: ever was.
3838 PH/18 Refactored debugging code in route_finduser() to show more information,
3839 in particular, the error code if getpwnam() issues one.
3841 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3842 This is apparently needed in addition to the PH/07 change above to avoid
3843 any possible encoding problems.
3845 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3846 but not after initializing Perl.
3848 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3849 output them only if debugging. By default they are written stderr,
3850 apparently, which is not desirable.
3852 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3855 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3858 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3860 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3861 authenticated or an ident call has been made. Suppress the default
3862 values for $authenticated_id and $authenticated_sender (but permit -oMai
3863 and -oMas) when testing with -bh.
3865 PH/24 Re-jigged the order of the tests in the default configuration so that the
3866 tests for valid domains and recipients precede the DNS black list and CSA
3867 tests, on the grounds that those ones are more expensive.
3869 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3870 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3871 This bug exists in every version of Exim that I still have, right back to
3874 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3875 However, an attempt to turn on case-sensitivity in a regex key by
3876 including (?-i) didn't work because the subject string was already
3877 lowercased, and the effects were non-intuitive. It turns out that a
3878 one-line patch can be used to allow (?-i) to work as expected.
3884 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3885 other effects) broke the use of negated acl sub-conditions.
3887 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3890 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3891 "Deny" causes Exim to reject the incoming connection with a 554 error.
3892 Unfortunately, if there is a major crisis, such as a disk failure,
3893 tcp-wrappers gives "deny", whereas what one would like would be some
3894 kind of temporary error. A kludge has been added to help with this.
3895 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3896 554 error is used if errno is still zero or contains ENOENT (which occurs
3897 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3900 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3902 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3903 errors. Otherwise a message that provokes a temporary error (when other
3904 messages do not) can cause a whole host to time out.
3906 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3907 addresses were routed directly to files or pipes from a redirect router.
3908 File deliveries just didn't batch; pipe deliveries might have suffered
3911 PH/06 A failure to get a lock for a hints database would erroneously always say
3912 "Failed to get write lock", even when it was really a read lock.
3914 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3915 of 0600. This has been changed to use the value of the lockfile_mode
3916 option (which defaults to 0600).
3918 PH/08 Applied small patch from the Sieve maintainer.
3920 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3921 folder from quota calculations, a direct delivery into this folder messed
3922 up the contents of the maildirsize file. This was because the regex was
3923 used only to exclude .Trash (or whatever) when the size of the mailbox
3924 was calculated. There was no check that a delivery was happening into an
3925 excluded directory. This bug has been fixed by ignoring all quota
3926 processing for deliveries into excluded directories.
3928 PH/10 Added the maildirfolder_create_regex option to appendfile.
3934 PH/01 The code for finding all the local interface addresses on a FreeBSD
3935 system running IPv6 was broken. This may well have applied to all BSD
3936 systems, as well as to others that have similar system calls. The broken
3937 code found IPv4 interfaces correctly, but gave incorrect values for the
3938 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3939 that it would not match correctly against @[] and not recognize the IPv6
3942 PH/02 The ipliteral router was not recognizing addresses of the form user@
3943 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3945 PH/03 Added disable_ipv6.
3947 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3948 decoded form, because it is most often used to construct To: headers
3949 lines in autoreplies, and the decoded form may well be syntactically
3950 invalid. However, $reply_address has leading white space removed, and all
3951 newlines turned into spaces so that the autoreply transport does not
3954 PH/05 If group was specified without a user on a router, and no group or user
3955 was specified on a transport, the group from the router was ignored.
3957 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3958 for visible compile-time settings that can be used to change these
3959 numbers, for those that want even more. Backwards compatibility with old
3960 spool files has been maintained. However, going back to a previous Exim
3961 release will lost any variables that are in spool files.
3963 PH/07 Two small changes when running in the test harness: increase delay when
3964 passing a TCP/IP connection to a new process, in case the original
3965 process has to generate a bounce, and remove special handling of
3966 127.0.0.2 (sic), which is no longer necessary.
3968 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3969 be the same on different OS.
3971 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3974 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3975 whether --show-vars was specified or not
3977 JJ/02 exipick: Added support for new ACL variable spool format introduced
3980 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3981 syntactically invalid From: or Reply-to: line, and a filter used this to
3982 generate an autoreply, and therefore failed to obtain an address for the
3983 autoreply, Exim could try to deliver to a non-existent relative file
3984 name, causing unrelated and misleading errors. What now happens is that
3985 it logs this as a hard delivery error, but does not attempt to create a
3988 PH/11 The exinext utility has a -C option for testing purposes, but although
3989 the given file was scanned by exinext itself; it wasn't being passed on
3990 when Exim was called.
3992 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3993 an end-of-file indication when reading a command response.
3995 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3996 compiled. In many other places in Exim, IPv6 addresses are always
3997 recognized, so I have changed this. It also means that IPv4 domain
3998 literals of the form [IPV4:n.n.n.n] are now always recognized.
4000 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4001 used if the router is not running as root, for example, when verifying at
4002 ACL time, or when using -bh. The debugging output from this situation was
4003 non-existent - all you got was a failure to exec. I have made two
4006 (a) Failures to set uid/gid, the current directory, or a process leader
4007 in a subprocess such as that created by queryprogram now generate
4008 suitable debugging output when -d is set.
4010 (b) The queryprogram router detects when it is not running as root,
4011 outputs suitable debugging information if -d is set, and then runs
4012 the subprocess without attempting to change uid/gid.
4014 PH/15 Minor change to Makefile for building test_host (undocumented testing
4017 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4018 additional section of a DNS packet that returns MX or SRV records.
4019 Instead, it always explicitly searches for A/AAAA records. This avoids
4020 major problems that occur when a DNS server includes only records of one
4021 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4022 fixed another bug: if SRV records were looked up and the corresponding
4023 address records were *not* found in the additional section, the port
4024 values from the SRV records were lost.
4026 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4027 using the correct key (the original address) when searching the retry
4028 rules in order to find which one to use for generating the retry hint.
4030 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4031 adding the default one. Similarly, if it contains a Reply-To: header, the
4032 errors_reply_to option, if set, is not used.
4034 PH/19 When calculating a retry time, Exim used to measure the "time since
4035 failure" by looking at the "first failed" field in the retry record. Now
4036 it does not use this if it is later than than the arrival time of the
4037 message. Instead it uses the arrival time. This makes for better
4038 behaviour in cases where some deliveries succeed, thus re-setting the
4039 "first failed" field. An example is a quota failure for a huge message
4040 when small messages continue to be delivered. Without this change, the
4041 "time since failure" will always be short, possible causing more frequent
4042 delivery attempts for the huge message than are intended.
4043 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4045 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4046 $1, $2, $3) because the numerical variables can be reset during some
4047 expansion items (e.g. "match"), thereby losing the authentication data.
4049 PH/21 Make -bV show the size of off_t variables so that the test suite can
4050 decide whether to run tests for quotas > 2G.
4052 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4053 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4054 filecount value is greater than 2G or if a quota value is greater than 2G
4055 on a system where the size of off_t is not greater than 4, a panic error
4058 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4059 never match. The debug and -bh output now contains an explicit error
4060 message indicating a malformed IPv4 address or mask.
4062 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4063 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4064 PH/23 above applies.
4066 PH/25 Do not write to syslog when running in the test harness. The only
4067 occasion when this arises is a failure to open the main or panic logs
4068 (for which there is an explicit test).
4070 PH/26 Added the /no_tell option to "control=freeze".
4072 PH/27 If a host name lookup failed very early in a connection, for example, if
4073 the IP address matched host_lookup and the reverse lookup yielded a name
4074 that did not have a forward lookup, an error message of the form "no IP
4075 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4076 could be logged. Now it outputs the IP address instead of "NULL".
4078 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4079 allows the sender and the authenticated sender to be set when
4080 submitting a message from within Exim. Since child_open_exim() is
4081 documented for local_scan(), the new function should be too.
4083 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4084 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4085 results in an empty string is now treated as unset.
4087 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4089 PH/31 Added sender_verify_fail logging option.
4091 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4092 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4093 tidied the source and removed it altogether.
4095 PH/33 When a queue run was abandoned because the load average was too high, a
4096 log line was always written; now it is written only if the queue_run log
4097 selector is set. In addition, the log line for abandonment now contains
4098 information about the queue run such as the pid. This is always present
4099 in "start" and "stop" lines but was omitted from the "abandon" line.
4101 PH/34 Omit spaces between a header name and the colon in the error message that
4102 is given when verify = headers_syntax fails (if there are lots of them,
4103 the message gets confusing).
4105 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4106 names, as there are now some PTR records that contain slashes. This check
4107 is only to protect against broken name servers that fall over on strange
4108 characters, so the fact that it applies to all lookups doesn't matter.
4110 PH/36 Now that the new test suite is complete, we can remove some of the
4111 special code in Exim that was needed for the old test suite. For example,
4112 sorting DNS records because real resolvers return them in an arbitrary
4113 order. The new test suite's fake resolver always returns records in the
4116 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4117 bounces) except when queue_only is set, to avoid logging races between
4118 the different processes.
4120 PH/38 Panic-die if .include specifies a non-absolute path.
4122 PH/39 A tweak to the "H" retry rule from its user.
4124 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4125 a label. They prevented compilation on older perls.
4127 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4128 a warning to be raised on newish perls.
4130 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4131 on queue. Changes to match documented behaviour of showing count of
4132 messages matching specified criteria.
4134 PH/40 Changed the default ident timeout from 30s to 5s.
4136 PH/41 Added support for the use of login_cap features, on those BSD systems
4137 that have them, for controlling the resources used by pipe deliveries.
4139 PH/42 The content-scanning code uses fopen() to create files in which to put
4140 message data. Previously it was not paying any attention to the mode of
4141 the files. Exim runs with umask(0) because the rest of the code creates
4142 files with open(), and sets the required mode explicitly. Thus, these
4143 files were ending up world-writeable. This was not a big issue, because,
4144 being within the spool directory, they were not world-accessible. I have
4145 created a function called modefopen, which takes an additional mode
4146 argument. It sets umask(777), creates the file, chmods it to the required
4147 mode, then resets the umask. All the relevant calls to fopen() in the
4148 content scanning code have been changed to use this function.
4150 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4151 to 24 hours. This avoids potential overflow problems when processing G
4152 and H retry rules. I suspect nobody ever tinkers with this value.
4154 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4156 PH/45 When the plaintext authenticator is running as a client, the server's
4157 challenges are checked to ensure they are valid base64 strings. By
4158 default, the authentication attempt is cancelled if an invalid string is
4159 received. Setting client_ignore_invalid_base64 true ignores these errors.
4160 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4161 they are received. Thus, the responses can be made to depend on the
4162 challenges. If an invalid string is ignored, an empty string is placed in
4165 PH/46 Messages that are created by the autoreply transport now contains a
4166 References: header, in accordance with RFCs 2822 and 3834.
4168 PH/47 Added authenticated_sender_force to the smtp transport.
4170 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4172 PH/49 Installed latest patch from the Sieve maintainer.
4174 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4175 was also set, the appendfile transport was unnecessarily scanning a
4176 directory of message files (e.g. for maildir delivery) to find the count
4177 of files (along with the size), even though it did not need this
4178 information. It now does the scan only if it needs to find either the
4179 size of the count of files.
4181 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4183 PH/52 Two bugs concerned with error handling when the smtp transport is
4186 (i) Exim was not creating retry information for temporary errors given
4187 for individual recipients after the DATA command when the smtp transport
4188 was used in LMTP mode. This meant that they could be retried too
4189 frequently, and not timed out correctly.
4191 (ii) Exim was setting the flag that allows error details to be returned
4192 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4193 recipients that were returned after the DATA command.
4195 PH/53 This is related to PH/52, but is more general: for any failing address,
4196 when detailed error information was permitted to be returned to the
4197 sender, but the error was temporary, then after the final timeout, only
4198 "retry timeout exceeded" was returned. Now it returns the full error as
4199 well as "retry timeout exceeded".
4201 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4202 do this, and (what is worse) MTAs that accept it.
4204 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4205 will now be deprecated.
4207 PH/56 New os.c-cygwin from the Cygwin maintainer.
4209 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4210 formats (previously only available in exim formats via -bpr, -bpru,
4211 and -bpra. Now also available in native and exiqgrep formats)
4213 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4214 with very large, slow to parse queues
4216 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4218 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4220 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4221 responses to authentication challenges, though it was showing the
4222 challenges; (ii) I've removed the CR characters from the debug output for
4225 PH/58 Allow for the insertion of a newline as well as a space when a string
4226 is turned into more than one encoded-word during RFC 2047 encoding. The
4227 Sieve code now uses this.
4229 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4230 data_4xx, lost_connection, tls_required.
4232 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4233 message was being sent as an SMTP response.
4235 PH/61 Add -l and -k options to exicyclog.
4237 PH/62 When verifying, if an address was redirected to one new address, so that
4238 verification continued, and the new address failed or deferred after
4239 having set something in $address_data, the value of $address_data was not
4240 passed back to the ACL. This was different to the case when no
4241 redirection occurred. The value is now passed back in both cases.
4243 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4244 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4245 use login_cap.h, so on its own it isn't the distinguishing feature. The
4246 new name refers directly to the setclassresources() function.
4248 PH/65 Added configuration files for NetBSD3.
4250 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4252 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4253 is preferred over IPv4.
4255 PH/68 The bounce_return_message and bounce_return_body options were not being
4256 honoured for bounces generated during the reception of non-SMTP messages.
4257 In particular, this applied to messages rejected by the ACL. This bug has
4258 been fixed. However, if bounce_return_message is true and bounce_return_
4259 body is false, the headers that are returned for a non-SMTP message
4260 include only those that have been read before the error was detected.
4261 (In the case of an ACL rejection, they have all been read.)
4263 PH/69 The HTML version of the specification is now built in a directory called
4264 spec_html instead of spec.html, because the latter looks like a path with
4265 a MIME-type, and this confuses some software.
4267 PH/70 Catch two compiler warnings in sieve.c.
4269 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4270 function verify_get_ident() calls ip_connect() to connect a socket, but
4271 if the "connect()" function timed out, ip_connect() used to close the
4272 socket. However, verify_get_ident() also closes the socket later, and in
4273 between Exim writes to the log, which may get opened at this point. When
4274 the socket was closed in ip_connect(), the log could get the same file
4275 descriptor number as the socket. This naturally causes chaos. The fix is
4276 not to close the socket in ip_connect(); the socket should be closed by
4277 the function that creates it. There was only one place in the code where
4278 this was missing, in the iplookup router, which I don't think anybody now
4279 uses, but I've fixed it anyway.
4281 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4282 well as to direct DNS lookups. Otherwise the handling of names in host
4283 lists is inconsistent and therefore confusing.
4289 PH/01 Two changes to the default runtime configuration:
4291 (1) Move the checks for relay_from_hosts and authenticated clients from
4292 after to before the (commented out) DNS black list checks.
4294 (2) Add control=submission to the relay_from_hosts and authenticated
4295 clients checks, on the grounds that messages accepted by these
4296 statements are most likely to be submissions.
4298 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4300 (1) Generate an error if the third argument for the ${prvs expansion is
4303 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4306 (3) Reset the variables that are obtained from the first argument of
4307 ${prvscheck and used in the second argument before leaving the code,
4308 because their memory is reclaimed, so using them afterwards may do
4311 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4312 one (it's much easier than Tom thought :-).
4314 (5) Because of (4), we can now allow for the use of $prvscheck_result
4315 inside the third argument.
4317 PH/03 For some reason, the default setting of PATH when running a command from
4318 a pipe transport was just "/usr/bin". I have changed it to
4321 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4322 anything to be listed in the output from -bV.
4324 PH/05 When a filter generated an autoreply, the entire To: header line was
4325 quoted in the delivery log line, like this:
4327 => >A.N.Other <ano@some.domain> <original@ddress> ...
4329 This has been changed so that it extracts the operative address. There
4330 may be more than one such address. If so, they are comma-separated, like
4333 => >ano@some.domain,ona@other.domain <original@ddress> ...
4335 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4336 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4337 not being looked up in the rDNS to get a host name, Exim was showing the
4338 IP address twice in Received: lines, even though the IP addresses were
4339 identical. For example:
4341 Received: from [1.2.3.4] (helo=[1.2.3.4])
4343 However, if the real host name was known, it was omitting the HELO data
4344 if it matched the actual IP address. This has been tidied up so that it
4345 doesn't show the same IP address twice.
4347 PH/07 When both +timestamp and +memory debugging was on, the value given by
4348 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4349 called by the debug printing, thereby overwriting the timestamp buffer.
4350 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4352 PH/08 When the original message was included in an autoreply transport, it
4353 always said "this is a copy of the message, including all the headers",
4354 even if body_only or headers_only was set. It now gives an appropriate
4357 PH/09 Applied a patch from the Sieve maintainer which:
4359 o fixes some comments
4360 o adds the (disabled) notify extension core
4361 o adds some debug output for the result of if/elsif tests
4362 o points to the current vacation draft in the documentation
4363 and documents the missing references header update
4367 o fixes a bug in processing the envelope test (when testing
4368 multiple envelope elements, the last element determined the
4371 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4372 Electronic Mail") by including:
4374 Auto-submitted: auto-generated
4376 in the messages that it generates (bounce messages and others, such as
4377 warnings). In the case of bounce messages for non-SMTP messages, there was
4378 also a typo: it was using "Auto_submitted" (underscore instead of
4379 hyphen). Since every message generated by Exim is necessarily in response
4380 to another message, thes have all been changed to:
4382 Auto-Submitted: auto-replied
4384 in accordance with these statements in the RFC:
4386 The auto-replied keyword:
4388 - SHOULD be used on messages sent in direct response to another
4389 message by an automatic process,
4391 - MUST NOT be used on manually-generated messages,
4393 - MAY be used on Delivery Status Notifications (DSNs) and Message
4394 Disposition Notifications (MDNs),
4396 - MUST NOT be used on messages generated by automatic or periodic
4397 processes, except for messages which are automatic responses to
4400 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4401 to the default Received: header definition.
4403 PH/12 Added log selector acl_warn_skipped (default on).
4405 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4406 variables because (a) they are in the wrong storage pool and (b) even if
4407 they were copied, it wouldn't work properly because of the caching.
4409 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4410 checking when decoding. Apparently there are clients that generate
4411 overlong encoded strings. Why am I not surprised?
4413 PH/15 If the first argument of "${if match_address" was not empty, but did not
4414 contain an "@" character, Exim crashed. Now it writes a panic log message
4415 and treats the condition as false.
4417 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4419 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4420 extension "envelope-auth". The code is finished and in agreement with
4421 other implementations, but there is no documentation so far and in fact,
4422 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4423 not changing the active code.
4425 Print executed "if" and "elsif" statements when debugging is used. This
4426 helps a great deal to understand what a filter does.
4428 Document more things not specified clearly in RFC3028. I had all this
4429 sorted out, when out of a sudden new issues came to my mind. Oops."
4431 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4434 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4435 canonical form (as documented). However, after a host name lookup from
4436 the IP address, check_host() was doing a simple string comparison with
4437 addresses acquired from the DNS when checking that the found name did
4438 have the original IP as one of its addresses. Since any found IPv6
4439 addresses are likely to be in abbreviated form, the comparison could
4440 fail. Luckily, there already exists a function for doing the comparison
4441 by converting both addresses to binary, so now that is used instead of
4442 the text comparison.
4444 PH/20 There was another similar case to PH/19, when a complete host name was
4445 given in a host list; looking up its IP address could give an abbreviated
4446 form, whereas the current host's name might or might not be abbreviated.
4447 The same fix has been applied.
4453 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4454 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4457 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4458 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4460 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4462 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4463 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4464 Also, for "Auto-Submitted", treat anything other than "no" as
4465 non-personal, in accordance with RFC 3834. (Previously it treated
4466 anything starting "auto-" as non-personal.)
4468 TF/01 The control=submission/name=... option had a problem with syntax
4469 errors if the name included a slash character. The /name= option
4470 now slurps the rest of the string, so it can include any characters
4471 but it must come last in the list of options (after /sender_retain
4474 PH/05 Some modifications to the interface to the fake nameserver for the new
4482 TK/01 Added the "success_on_redirect" address verification option. See
4483 NewStuff for rationale and an example.
4485 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4487 PH/02 Patch to exigrep to allow it to work on syslog lines.
4489 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4490 fread() to skip over the body file's header line, because in Cygwin the
4491 header line is locked and is inaccessible.
4493 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4494 co-exist for some time) to make it clear that it is the Exim ID that is
4495 referenced, not the Message-ID: header line.
4497 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4498 string_format() function, because snprintf() does not exist on all
4501 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4502 ${stat: expansion item.
4504 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4505 protocol synchronization error", to keep the pedants happy.
4507 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4508 well as for IRIX systems, when gcc is being used. See the host.c source
4511 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4513 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4516 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4517 transport and to the smtp transport in LMTP mode.
4519 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4521 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4522 run a filter in a subprocess. This could lead to confusion in subsequent
4523 lookups in the parent process. There should also be a search_tidyup() at
4524 the end of the subprocess.
4526 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4527 only if the host matched helo_try_verify_hosts, which caused the
4528 verification to occur when the EHLO/HELO command was issued. The ACL just
4529 tested the remembered result. Now, if a previous verification attempt has
4530 not happened, "verify = helo" does it there and then.
4532 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4534 TK/03 Fix log output including CR from clamd.
4536 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4537 exist provoked a memory error which could cause a segfault.
4539 PH/15 Installed PCRE 6.2
4541 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4543 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4544 of the problem. Specifically, suggested +O2 rather than +O1 for the
4547 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4549 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4550 record, the port was not correctly logged when the outgoing_port log
4551 selector was set (it logged the transort's default port).
4553 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4554 fallback_hosts, and "hosts" in the smtp transport.
4556 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4557 host errors such as "Connection refused".
4559 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4560 authentication with radiusclient 0.4.9:
4562 - Error returned from rc_read_config was caught wrongly
4563 - Username/password not passed on to radius server due to wrong length.
4565 The presumption is that some radiusclient API changes for 4.51/PH/17
4566 were not taken care of correctly. The code is still untested by me (my
4567 Linux distribution still has 0.3.2 of radiusclient), but it was
4568 contributed by a Radius user.
4570 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4571 expanding the "port" option of the smtp transport.
4573 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4574 while reading a MIME header. Thanks to Tom Hughes for a patch.
4576 PH/24 Include config.h inside local_scan.h so that configuration settings are
4579 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4580 that in an ACL for RCPT (for example), you can examine exactly what was
4583 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4584 commands, but it was not correctly comparing the address with the actual
4585 client host address. Thus, it would show the EHLO address in Received:
4586 header lines when this was not necessary.
4588 PH/27 Added the % operator to ${eval:}.
4590 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4591 it should be ignoring failures (because with -C, for example, it has lost
4592 privilege). It wasn't ignoring creation failures other than "already
4595 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4598 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4599 because an input line was too long, either on its own, or by virtue of
4600 too many continuations, the temporary file was not being removed, and the
4601 return code was incorrect.
4603 PH/31 Missing "BOOL" in function definition in filtertest.c.
4605 PH/32 Applied Sieve patches from the maintainer.
4607 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4609 PH/33 Added "verify = not_blind".
4611 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4612 Local/Makefile (with some defaults set). These are used in built scripts
4613 such as exicyclog, but they have never been used in the exim_install
4614 script (though there are many overriding facilities there). I have
4615 arranged that the exim_install script now takes note of these two
4618 PH/35 Installed configuration files for Dragonfly.
4620 PH/36 When a locally submitted message by a trusted user did not contain a
4621 From: header, and the sender address was obtained from -f or from an SMTP
4622 MAIL command, and the trusted user did not use -F to supply a sender
4623 name, $originator_name was incorrectly used when constructing a From:
4624 header. Furthermore, $originator_name was used for submission mode
4625 messages from external hosts without From: headers in a similar way,
4626 which is clearly wrong.
4628 PH/37 Added control=suppress_local_fixups.
4630 PH/38 When log_selector = +received_sender was set, and the addition of the
4631 sender made the log line's construction buffer exactly full, or one byte
4632 less than full, an overflow happened when the terminating "\n" was
4635 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4636 when the result of a list match is failure because a DNS lookup failed.
4638 PH/40 RM_COMMAND is now used in the building process.
4640 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4641 the "build-* directories that it finds.
4643 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4644 address in a domain literal was a prefix of an interface address.
4646 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4647 when verifying a sender address, unless rewrite_headers is false.
4649 PH/44 Wrote a long comment about why errors_to addresses are verified as
4650 recipients, not senders.
4652 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4653 the ratelimit ACL was added.
4655 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4657 PH/46 Added extra information about PostgreSQL errors to the error string.
4659 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4660 avoiding the need to install special zones in a real server. This is
4661 backwards compatible; if it can't find the fake resolver, it drops back.
4662 Thus, both old and new test suites can be run.
4664 TF/02 Added util/ratelimit.pl
4666 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4667 clock is set back in time.
4669 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4670 Candler <B.Candler@pobox.com>.
4672 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4673 OK for addresses that are the result of redirections.
4675 PH/48 A number of further additions for the benefit of the new test suite,
4676 including a fake gethostbyname() that interfaces to the fake DNS resolver
4679 TF/06 The fix for widen_domains has also been applied to qualify_single and
4680 search_parents which are the other dnslookup options that can cause
4683 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4686 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4688 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4689 service" if it encountered an MX record with an empty target hostname.
4690 The message is now "an MX or SRV record indicated no SMTP service".
4692 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4693 if the DNS of the sending site is misconfigured. This is quite a
4694 common situation. This change restores the behaviour of treating a
4695 helo verification defer as a failure.
4697 PH/51 If self=fail was set on a router, the bounce message did not include the
4698 actual error message.
4704 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4706 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4707 command itself ended in error, the underlying message about the transport
4708 filter timeout was being overwritten with the pipe command error. Now the
4709 underlying error message should be appended to the second error message.
4711 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4713 PH/02 Reduce the amount of output that "make" produces by default. Full output
4714 can still be requested.
4716 PH/03 The warning log line about a condition test deferring for a "warn" verb
4717 was being output only once per connection, rather than after each
4718 occurrence (because it was using the same function as for successful
4719 "warn" verbs). This seems wrong, so I have changed it.
4721 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4722 it should not have, which might have caused a crash in the right
4723 circumstances, but probably never did.
4725 PH/04 Installed a modified version of Tony Finch's patch to make submission
4726 mode fix the return path as well as the Sender: header line, and to
4727 add a /name= option so that you can make the user's friendly name appear
4730 TF/03 Added the control = fakedefer ACL modifier.
4732 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4733 Mark Lowes for thorough testing.
4735 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4737 TK/03 Merged latest SRS patch from Miles Wilton.
4739 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4740 with the definition in sysexits.h (which is #included earlier).
4741 Fortunately, Exim does not actually use EX_OK. The code used to try to
4742 preserve the sysexits.h value, by assuming that macro definitions were
4743 scanned for macro replacements. I have been disabused of this notion,
4744 so now the code just undefines EX_OK before #including unistd.h.
4746 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4747 in the smtp transport. When a block could not be written in a single
4748 write() function, the timeout was being re-applied to each part-write.
4749 This seems wrong - if the receiver was accepting one byte at a time it
4750 would take for ever. The timeout is now adjusted when this happens. It
4751 doesn't have to be particularly precise.
4753 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4754 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4756 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4757 without a domain if the check to <postmaster@domain> fails.
4759 SC/01 Eximstats: added -xls and the ability to specify output files
4760 (patch written by Frank Heydlauf).
4762 SC/02 Eximstats: use FileHandles for outputting results.
4764 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4766 SC/04 Eximstats: fixed display of large numbers with -nvr option
4768 SC/05 Eximstats: fixed merging of reports with empty tables.
4770 SC/06 Eximstats: added the -include_original_destination flag
4772 SC/07 Eximstats: removed tabs and trailing whitespace.
4774 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4776 TK/06 MBOX spool code: Add real "From " MBOX separator line
4777 so the .eml file is really in mbox format (even though
4778 most programs do not really care). Patch from Alex Miller.
4780 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4781 The latter is generated from $received_to and is only set if the
4782 message has one envelope recipient. SA can use these headers,
4783 obviously out-of-the-box. Patch from Alex Miller.
4785 PH/08 The ${def test on a variable was returning false if the variable's
4786 value was "0", contrary to what the specification has always said!
4787 The result should be true unless the variable is empty.
4789 PH/09 The syntax error of a character other than { following "${if
4790 def:variable_name" (after optional whitespace) was not being diagnosed.
4791 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4792 accidental colon was present, for example, could give incorrect results.
4794 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4795 result is used (not including appendfile, where other changes are about
4798 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4799 This involved changing a lot of size variables from int to off_t. It
4800 should work with maildirs and everything.
4802 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4803 spamd dying while we are connected to it.
4805 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4808 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4809 function for BDB 4.3.
4811 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4813 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4814 the sources for PCRE have been re-arranged and more files are now
4817 PH/15 The code I had for printing potentially long long variables in PH/11
4818 above was not the best (it lost precision). The length of off_t variables
4819 is now inspected at build time, and an appropriate printing format (%ld
4820 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4821 to be "long long int" or "long int". This is needed for the internal
4822 formatting function string_vformat().
4824 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4825 the configuration file to be ":syslog", then the script "guesses" where
4826 the logs files are, rather than using the compiled in default. In our
4827 case the guess is not the same as the compiled default, so the script
4828 suddenly stopped working when I started to use syslog. The patch checks
4829 to see if log_file_path is "". If so, it attempts to read it from exim
4830 with no configuration file to get the compiled in version, before it
4831 falls back to the previous guessing code."
4833 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4834 implementing BATV in an Exim configuration. See NewStuff for the gory
4837 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4838 Makefile that are specific to HP-UX.
4840 PH/18 If the "use_postmaster" option was set for a recipient callout together
4841 with the "random" option, the postmaster address was used as the MAIL
4842 FROM address for the random test, but not for the subsequent recipient
4843 test. It is now used for both.
4845 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4846 patch removes a few documentation additions to RFC 3028, because the
4847 latest draft now contains them. It adds the new en;ascii-case comparator
4848 and a new error check for 8bit text in MIME parts. Comparator and
4849 require names are now matched exactly. I enabled the subaddress
4850 extension, but it is not well tested yet (read: it works for me)."
4852 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4853 rework some of the code of TK/09 above to avoid the hardwired use of
4854 "%lld" and "long long". Replaced the call to snprintf() with a call to
4857 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4858 records point to non-existent hosts", "retry timeout exceeded", and
4859 "retry time not reached for any host after a long failure period".
4861 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4862 experimental DomainKeys support:
4864 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4865 (2) On an error such as an illegally used "control", the wrong name for
4866 the control was given.
4868 These problems did NOT occur unless DomainKeys support was compiled.
4870 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4872 PH/24 Added ${if match_ip condition.
4874 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4875 databases so that it will be absolutely obvious if a crash occurs in the
4876 DB library. This is a regular occurrence (often caused by mis-matched
4879 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4880 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4881 picked up on a user's system that detects such things. There doesn't seem
4882 to be a gcc warning option for this - only an attribute that has to be
4883 put on the function's prototype. It seems that in Fedora Core 4 they have
4884 set this on a number of new functions. No doubt there will be more in due
4887 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4888 specify a transport. However, if an address that was verified by such a
4889 router was the subject of a callout, Exim crashed because it tried to
4890 read the rcpt_include_affixes from the non-existent transport. Now it
4891 just assumes that the setting of that option is false. This bug was
4892 introduced by 4.51/PH/31.
4894 PH/28 Changed -d+all to exclude +memory, because that information is very
4895 rarely of interest, but it makes the output a lot bigger. People tend to
4896 do -d+all out of habit.
4898 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4899 code in os-type was giving problems when libc.so lives in lib64, like on
4902 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4903 aren't the modern standard, and it seems that some systems' include files
4904 don't always have them. Exim was already checking for some of the newer
4905 ones like T_AAAA, and defining it itself. I've added checks for all the
4906 record types that Exim uses.
4908 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4909 not automatically generating a new one, as it is supposed to. This
4910 prevented TLS from working. If the file did exist, but contained invalid
4911 data, a new version was generated, as expected. It was only the case of a
4912 non-existent file that was broken.
4914 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4915 with a change in libdomainkeys > 0.64.
4917 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4918 from DNS. If the selector record carries the flag, it now has
4919 precedence over the domain-wide flag.
4921 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4923 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4924 the use of a port name that isn't defined in /etc/services) occurred, the
4925 message was deferred as in a normal delivery, and thus remained on the
4926 spool, instead of being failed because of the mua_wrapper setting. This
4927 is now fixed, and I tidied up some of the mua_wrapper messages at the
4930 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4931 the messages in a hash of arrays rather than using individual hashes.
4932 This is a bit cleaner and results in dramatic memory savings, albeit
4933 at a slight CPU cost.
4935 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4936 as requested by Marc Sherman.
4938 SC/10 Eximstats: added histograms for user specified patterns as requested
4941 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4943 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4944 fopen() in the content-scanning modules that did not already have it.
4950 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4951 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4953 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4955 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4957 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4958 to test Sieve filters that use "vacation".
4960 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4961 that changes the way the GnuTLS parameters are stored in the cache file.
4962 The new format can be generated externally. For backward compatibility,
4963 if the data in the cache doesn't make sense, Exim assumes it has read an
4964 old-format file, and it generates new data and writes a new file. This
4965 means that you can't go back to an older release without removing the
4968 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4969 work if there are any delivery delays because "one_time" forces the
4970 parent to be marked "delivered", so its unseen clone is never tried
4971 again. For this reason, Exim now forbids the simultaneous setting of
4974 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4975 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4976 entry if you want to know the details. The fix, however, neglected to
4977 consider the case when local delivery batching is involved. The test for
4978 "previously delivered" was not happening when checking to see if an
4979 address could be batched with a previous (undelivered) one; under
4980 certain circumstances this could lead to multiple deliveries to the same
4983 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4984 in its include files, and this causes problems building Exim.
4986 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4987 header_syntax) but Exim was just ignoring anything given after a slash.
4988 In particular, this caused confusion with an attempt to use "verify =
4989 reverse_host_lookup/defer_ok". An error is now given when options are
4990 supplied for verify items that do not have them. (Maybe reverse_host_
4991 lookup should have a defer_ok option, but that's a different point.)
4993 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4994 defined by RFC 821) to 2048, because there were problems with some AUTH
4995 commands, and RFC 1869 says the size should be increased for extended
4996 SMTP commands that take arguments.
4998 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5001 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5002 "unknown" error; now it says that the functionality isn't in the binary.
5004 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5005 an address' error message when a string expansion fails (syntax or
5006 whatever). Otherwise the password may appear in the log. Following change
5007 PH/42 below, there is no longer a chance of it appearing in a bounce
5010 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5012 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5013 of its addresses was ever tried. (Bugzilla bug #2.)
5015 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5016 the result incorrectly in the debug output. (It correctly added a newline
5017 to what was transported.)
5019 TF/01 Added $received_time.
5021 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5022 commented out examples of how to interface to a virus scanner and to
5023 SpamAssassin. Also added commented examples of av_scanner and
5024 spamd_address settings.
5026 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5027 and controls are allowed in which ACLs. There were a couple of minor
5028 errors. Some of the entries in the conditions table (which is a table of
5029 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5030 negation of where the condition IS allowed.
5032 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5034 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5035 header file does not have a version number, so I've had to invent a new
5036 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5037 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5038 radiusclient), but it was contributed by a Radius user.
5040 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5041 files or directories, for OpenSSL.
5043 PH/19 When an Exim process that is running as root has to create an Exim log
5044 file, it does so in a subprocess that runs as exim:exim so as to get the
5045 ownership right at creation (otherwise, other Exim processes might see
5046 the file with the wrong ownership). There was no test for failure of this
5047 fork() call, which would lead to the process getting stuck as it waited
5048 for a non-existent subprocess. Forks do occasionally fail when resources
5049 run out. I reviewed all the other calls to fork(); they all seem to check
5052 PH/20 When checking for unexpected SMTP input at connect time (before writing
5053 the banner), Exim was not dealing correctly with a non-positive return
5054 from the read() function. If the client had disconnected by this time,
5055 the result was a log entry for a synchronization error with an empty
5056 string after "input=" when read() returned zero. If read() returned -1
5057 (an event I could not check), uninitialized data bytes were printed.
5058 There were reports of junk text (parts of files, etc) appearing after
5061 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5063 PH/22 Added support for macro redefinition, and (re)definition in between
5064 driver and ACL definitions.
5066 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5067 forgetting to use the resulting value; it was using the unexpanded value.
5069 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5070 hadn't been configured. The fix is from Juergen Kreileder, who
5071 understands it better than I do:
5073 "Here's what I see happening with three configured cyrus_sasl
5074 authenticators configured (plain, login, cram-md5):
5076 On startup auth_cyrus_sasl_init() gets called for each of these.
5077 This means three calls to sasl_listmech() without a specified mech_list.
5078 => SASL tests which mechs of all available mechs actually work
5079 => three warnings about OTP not working
5080 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5082 With the patch, sasl_listmech() also gets called three times. But now
5083 SASL's mech_list option is set to the server_mech specified in the the
5084 authenticator. Or in other words, the answer from sasl_listmech()
5085 gets limited to just the mech you're testing for (which is different
5087 => the return list contains just 'plain' or 'login', 'cram-md5' or
5088 nothing depending on the value of ob->server_mech.
5090 I've just tested the patch: Authentication still works fine,
5091 unavailable mechs specified in the exim configuration are still
5092 caught, and the auth.log warnings about OTP are gone."
5094 PH/25 When debugging is enabled, the contents of the command line are added
5095 to the debugging output, even when log_selector=+arguments is not
5098 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5099 answer is "GNU", and only if the return is "GNU/something" is the answer
5102 PH/27 $acl_verify_message is now set immediately after the failure of a
5103 verification in an ACL, and so is available in subsequent modifiers. In
5104 particular, the message can be preserved by coding like this:
5106 warn !verify = sender
5107 set acl_m0 = $acl_verify_message
5109 Previously, $acl_verify_message was set only while expanding "message"
5110 and "log_message" when a very denied access.
5112 PH/28 Modified OS/os.c-Linux with
5114 -#ifndef OS_LOAD_AVERAGE
5115 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5117 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5118 nomenclature these days.)
5120 PH/29 Installed patch from the Sieve maintainer that adds the options
5121 sieve_useraddress and sieve_subaddress to the redirect router.
5123 PH/30 In these circumstances:
5124 . Two addresses routed to the same list of hosts;
5125 . First host does not offer TLS;
5126 . First host accepts first address;
5127 . First host gives temporary error to second address;
5128 . Second host offers TLS and a TLS session is established;
5129 . Second host accepts second address.
5130 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5131 and peerdn, if requested) that were in fact used only for the second
5134 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5135 attention to any local part prefix or suffix that was matched by the
5136 router that accepted the address. It now behaves in the same way as it
5137 does for delivery: the affixes are removed from the local part unless
5138 rcpt_include_affixes is set on the transport.
5140 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5141 timeout during the DATA phase of an incoming message.
5143 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5144 applied a patch sanctioned by the Sieve maintainer.
5146 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5147 the uid or gid is negative. A case of a negative gid caused this to be
5148 noticed. The fix allows for either to be negative.
5150 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5151 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5154 PH/36 The change PH/12 above was broken. Fixed it.
5156 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5157 the grounds that routing the same address twice would always produce the
5158 same answer. This might have been true once, but it is certainly no
5159 longer true now. Routing a child address may depend on the previous
5160 routing that produced that child. Some complicated redirection strategies
5161 went wrong when messages had multiple recipients, and made Exim's
5162 behaviour dependent on the order in which the addresses were given.
5164 I have moved the duplicate checking until after the routing is complete.
5165 Exim scans the addresses that are assigned to local and remote
5166 transports, and removes any duplicates. This means that more work will be
5167 done, as duplicates will always all be routed, but duplicates are
5168 presumably rare, so I don't expect this is of any significance.
5170 For deliveries to pipes, files, and autoreplies, the duplicate checking
5171 still happens during the routing process, since they are not going to be
5174 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5175 It corrects a timeout issue with spamd. This is Ian's comment: "The
5176 background is that sometimes spamd either never reads data from a
5177 connection it has accepted, or it never writes response data. The exiscan
5178 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5179 blindly assumes that writes won't block so it may never time out."
5181 PH/39 Allow G after quota size as well as K and M.
5183 PH/40 The value set for $authenticated_id in an authenticator may not contain
5184 binary zeroes or newlines because the value is written to log lines and
5185 to spool files. There was no check on this. Now the value is run through
5186 the string_printing() function so that such characters are converted to
5187 printable escape sequences.
5189 PH/41 $message_linecount is a new variable that contains the total number of
5190 lines in the message. Compare $body_linecount, which is the count for the
5193 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5194 bounce and delay warning messages, except in certain special cases, which
5197 (a) An SMTP error message from a remote host;
5198 (b) A message specified in a :fail: redirection;
5199 (c) A message specified in a "fail" command in a system filter;
5200 (d) A message specified in a FAIL return from the queryprogram router;
5201 (e) A message specified by the cannot_route_message router option.
5203 In these cases only, Exim does include the error details in bounce and
5204 warning messages. There are also a few cases where bland messages such
5205 as "unrouteable address" or "local delivery error" are given.
5207 PH/43 $value is now also set for the "else" part of a ${run expansion.
5209 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5210 being worked on, but at least Exim now implements the latest version to
5213 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5214 process to complete was treated as a delivery failure, a timeout while
5215 writing the message to the pipe was logged, but erroneously treated as a
5216 successful delivery. Such timeouts include transport filter timeouts. For
5217 consistency with the overall process timeout, these timeouts are now
5218 treated as errors, giving rise to delivery failures by default. However,
5219 there is now a new Boolean option for the pipe transport called
5220 timeout_defer, which, if set TRUE, converts the failures into defers for
5221 both kinds of timeout. A transport filter timeout is now identified in
5224 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5225 systems where "make" and "gmake" are different, calling "gmake" at top
5226 level broke things. I've arranged for the value of $(MAKE) to be passed
5227 from the Makefile to this script so that it can call the same version of
5231 A note about Exim versions 4.44 and 4.50
5232 ----------------------------------------
5234 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5235 changes of various kinds. As a consequence, a big documentation update was
5236 needed. This delayed the release for rather longer than seemed good, especially
5237 in the light of a couple of (minor) security issues. Therefore, the changes
5238 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5239 release. So 4.44 and 4.50 are in effect two different branches that both start
5242 I have left the 4.50 change log unchanged; it contains all the changes since
5243 4.43. The change log for 4.44 is below; many of its items are identical to
5244 those for 4.50. This seems to be the most sensible way to preserve the
5245 historical information.
5251 1. Minor wording change to the doc/README.SIEVE file.
5253 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5254 computation of the current number of files was incorrect.
5256 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5257 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5260 4. Give more explanation in the error message when the command for a transport
5261 filter fails to execute.
5263 5. There are several places where Exim runs a non-Exim command in a
5264 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5265 was being done only for the command run by the queryprogram router. It is
5266 now done for all such subprocesses. The other cases are: ${run, transport
5267 filters, and the commands run by the lmtp and pipe transports.
5269 6. Added CONFIGURE_GROUP build-time option.
5271 7. Some older OS have a limit of 256 on the maximum number of file
5272 descriptors. Exim was using setrlimit() to set 1000 as a large value
5273 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5274 systems. I've change it so that if it can't get 1000, it tries for 256.
5276 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5277 was an oversight, and furthermore, ever since the addition of extra
5278 controls (e.g. 4.43/32), the checks on when to allow different forms of
5279 "control" were broken. There should now be diagnostics for all cases when a
5280 control that does not make sense is encountered.
5282 9. Added the /retain_sender option to "control=submission".
5284 10. $recipients is now available in the predata ACL (oversight).
5286 11. Tidy the search cache before the fork to do a delivery from a message
5287 received from the command line. Otherwise the child will trigger a lookup
5288 failure and thereby defer the delivery if it tries to use (for example) a
5289 cached ldap connection that the parent has called unbind on.
5291 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5292 of $address_data from the recipient verification was clobbered by the
5293 sender verification.
5295 13. The value of address_data from a sender verification is now available in
5296 $sender_address_data in subsequent conditions in the ACL statement.
5298 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5300 15. Added a new option "connect=<time>" to callout options, to set a different
5303 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5304 was its contents. (It was OK if the option was not defined at all.)
5306 17. A "Completed" log line is now written for messages that are removed from
5307 the spool by the -Mrm option.
5309 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5310 information about exactly what failed.
5312 19. Added -dd to debug only the daemon process.
5314 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5315 handles timeouts, both on the server side and network timeouts. Renamed the
5316 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5318 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5319 It is now set to "smtps".
5321 22. $host_address is now set to the target address during the checking of
5322 ignore_target_hosts.
5324 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5325 being passed; this would have caused $sender_host_name to have been used if
5326 matching the list had actually called for a host name (not very likely,
5327 since this list is usually IP addresses). A host name is now passed as
5330 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5331 code that specifies a non-restarting handler (typically sigaction() in
5332 modern systems) in an attempt to fix a rare and obscure crash bug.
5334 25. Narrowed the window for a race in the daemon that could cause it to ignore
5335 SIGCHLD signals. This is not a major problem, because they are used only to
5336 wake it up if nothing else does.
5338 26. A malformed maildirsize file could cause Exim to calculate negative values
5339 for the mailbox size or file count. Odd effects could occur as a result.
5340 The maildirsize information is now recalculated if the size or filecount
5343 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5344 support for a long time. Removed HAVE_SYS_VFS_H.
5346 28. Installed the latest version of exipick from John Jetmore.
5348 29. In an address list, if the pattern was not a regular expression, an empty
5349 subject address (from a bounce message) matched only if the pattern was an
5350 empty string. Non-empty patterns were not even tested. This was the wrong
5351 because it is perfectly reasonable to use an empty address as part of a
5352 database query. An empty address is now tested by patterns that are
5353 lookups. However, all the other forms of pattern expect the subject to
5354 contain a local part and a domain, and therefore, for them, an empty
5355 address still always fails if the pattern is not itself empty.
5357 30. Exim went into a mad DNS loop when attempting to do a callout where the
5358 host was specified on an smtp transport, and looking it up yielded more
5359 than one IP address.
5361 31. Re-factored the code for checking spool and log partition space into a
5362 function that finds that data and another that does the check. The former
5363 is then used to implement four new variables: $spool_space, $log_space,
5364 $spool_inodes, and $log_inodes.
5366 32. The RFC2047 encoding function was originally intended for short strings
5367 such as real names; it was not keeping to the 75-character limit for
5368 encoded words that the RFC imposes. It now respects the limit, and
5369 generates multiple encoded words if necessary. To be on the safe side, I
5370 have increased the buffer size for the ${rfc2047: expansion operator from
5373 33. It is now permitted to omit both strings after an "if" condition; if the
5374 condition is true, the result is "true". As before, when the second string
5375 is omitted, a false condition yields an empty string. This makes it less
5376 cumbersome to write custom ACL and router conditions.
5378 34. Failure to deliver a bounce message always caused it to be frozen, even if
5379 there was an errors_to setting on the router. The errors_to setting is now
5382 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5383 canonical form (fully expanded) before being placed in
5384 $sender_host_address.
5386 36. The table in the code that translates DNS record types into text (T_A to
5387 "A" for instance) was missing entries for NS and CNAME. It is just possible
5388 that this could have caused confusion if both these types were looked up
5389 for the same domain, because the text type is used as part of Exim's
5390 per-process caching. But the chance of anyone hitting this buglet seems
5393 37. The dnsdb lookup has been extended in a number of ways.
5395 (1) There is a new type, "zns", which walks up the domain tree until it
5396 finds some nameserver records. It should be used with care.
5398 (2) There is a new type, "mxh", which is like "mx" except that it returns
5399 just the host names, not the priorities.
5401 (3) It is now possible to give a list of domains (or IP addresses) to be
5402 looked up. The behaviour when one of the lookups defers can be
5403 controlled by a keyword.
5405 (4) It is now possible to specify the separator character for use when
5406 multiple records are returned.
5408 38. The dnslists ACL condition has been extended: it is now possible to supply
5409 a list of IP addresses and/or domains to be looked up in a particular DNS
5412 39. Added log_selector=+queue_time_overall.
5414 40. When running the queue in the test harness, wait just a tad after forking a
5415 delivery process, to get repeatability of debugging output.
5417 41. Include certificate and key file names in error message when GnuTLS fails
5418 to set them up, because the GnuTLS error message doesn't include the name
5419 of the failing file when there is a problem reading it.
5421 42. Allow both -bf and -bF in the same test run.
5423 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5425 44. The "Exiscan patch" is now merged into the mainline Exim source.
5427 45. Sometimes the final signoff response after QUIT could fail to get
5428 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5429 < 0 before doing a fflush(). This bug looks as though it goes back to the
5430 introduction of TLS in release 3.20, but "sometimes" must have been rare
5431 because the tests only now provoked it.
5433 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5434 (this can affect the format of dates).
5436 47. exim_tidydb, when checking for the continued existence of a message for
5437 which it has found a message-specific retry record, was not finding
5438 messages that were in split spool directories. Consequently, it was
5439 deleting retry records that should have stayed in existence.
5441 48. Steve fixed some bugs in eximstats.
5443 49. The SPA authentication driver was not abandoning authentication and moving
5444 on to the next authenticator when an expansion was forced to fail,
5445 contradicting the general specification for all authenticators. Instead it
5446 was generating a temporary error. It now behaves as specified.
5448 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5449 (the order specifies the preference for clients). The order is now AES256,
5450 AES128, 3DES, ARCFOUR128.
5452 51. Small patch to Sieve code - explicitly set From: when generating an
5455 52. Exim crashed if a remote delivery caused a very long error message to be
5456 recorded - for instance if somebody sent an entire SpamAssassin report back
5457 as a large number of 550 error lines. This bug was coincidentally fixed by
5458 increasing the size of one of Exim's internal buffers (big_buffer) that
5459 happened as part of the Exiscan merge. However, to be on the safe side, I
5460 have made the code more robust (and fixed the comments that describe what
5463 53. Now that there can be additional text after "Completed" in log lines (if
5464 the queue_time_overall log selector is set), a one-byte patch to exigrep
5465 was needed to allow it to recognize "Completed" as not the last thing in
5468 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5469 patch that reportedly fixes this has been added. I am not expert enough to
5470 create a test for it. This is what the patch creator wrote:
5472 "I found a little strange behaviour of ldap code when working with
5473 Windows 2003 AD Domain, where users was placed in more than one
5474 Organization Units. When I tried to give exim partial DN, the exit code
5475 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5476 But simultaneously result of request was absolutely normal ldap result,
5477 so I produce this patch..."
5479 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5480 REFERENCE, so I have modified the code to exclude the patch when that macro
5483 55. Some experimental protocols are using DNS PTR records for new purposes. The
5484 keys for these records are domain names, not reversed IP addresses. The
5485 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5486 leaves it alone. Component reversal etc. now happens only for IP addresses.
5489 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5491 57. Double the size of the debug message buffer (to 2048) so that more of very
5492 long debug lines gets shown.
5494 58. The exicyclog utility now does better if the number of log files to keep
5495 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5497 59. Two changes related to the smtp_active_hostname option:
5499 (1) $smtp_active_hostname is now available as a variable.
5500 (2) The default for smtp_banner uses $smtp_active_hostname instead
5501 of $primary_hostname.
5503 60. The host_aton() function is supposed to be passed a string that is known
5504 to be a valid IP address. However, in the case of IPv6 addresses, it was
5505 not checking this. This is a hostage to fortune. Exim now panics and dies
5506 if the condition is not met. A case was found where this could be provoked
5507 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5508 components; fortuitously, this particular loophole had already been fixed
5509 by change 4.50/55 above.
5511 If there are any other similar loopholes, the new check in host_aton()
5512 itself should stop them being exploited. The report I received stated that
5513 data on the command line could provoke the exploit when Exim was running as
5514 exim, but did not say which command line option was involved. All I could
5515 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5516 running as the user.
5519 61. There was a buffer overflow vulnerability in the SPA authentication code
5520 (which came originally from the Samba project). I have added a test to the
5521 spa_base64_to_bits() function which I hope fixes it.
5524 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5525 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5527 63. The daemon start-up calls getloadavg() while still root for those OS that
5528 need the first call to be done as root, but it missed one case: when
5529 deliver_queue_load_max is set with deliver_drop_privilege. This is
5530 necessary for the benefit of the queue runner, because there is no re-exec
5531 when deliver_drop_privilege is set.
5533 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5534 This has been fixed.
5536 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5537 was in use, was not putting the data itself into the right store pool;
5538 consequently, it could be overwritten for a subsequent message in the same
5539 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5542 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5544 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5545 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5546 the function were treating the return as a boolean value, which happened to
5547 work because 0=false and not-0=true, but is not correct code.
5549 68. The host_aton() function was not handling scoped IPv6 addresses (those
5550 with, for example, "%eth0" on the end) correctly.
5552 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5553 negated items (that is, ~something) in unsigned ints. Some compilers
5554 apparently mutter when there is no cast.
5556 70. If an address verification called from an ACL failed, and did not produce a
5557 user-specific message (i.e. there was only a "system" message), nothing was
5558 put in $acl_verify_message. In this situation, it now puts the system
5561 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5562 session; change 4.31/43 added the unwanted input to the log line - except
5563 that it did not do this in the start of session case. It now does.
5565 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5566 This is wrong and can cause the other end to generate a synchronization
5567 error if it is another Exim or anything else that does the synchronization
5568 check. A QUIT command is no longer sent after a timeout.
5570 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5571 during host lookups.
5573 74. The defer_ok option of callout verification was not working if it was used
5574 when verifying addresses in header lines, that is, for this case:
5576 verify = header_sender/callout=defer_ok
5578 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5579 those file descriptors could be used for SMTP connections. If anything
5580 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5581 could be sent to the SMTP client, causing chaos. The daemon now opens
5582 stdin, stdout, and stderr to /dev/null when it puts itself into the
5585 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5586 log by default. The user can override this with suitable Perl magic.
5588 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5589 the log message when discard triggers, was not working for the DATA ACL or
5590 for the non-SMTP ACL.
5592 78. Error message wording change in sieve.c.
5594 79. If smtp_accept_max_per_host was set, the number of connections could be
5595 restricted to fewer than expected, because the daemon was trying to set up
5596 a new connection before checking whether the processes handling previous
5597 connections had finished. The check for completed processes is now done
5598 earlier. On busy systems, this bug wouldn't be noticed because something
5599 else would have woken the daemon, and it would have reaped the completed
5602 80. If a message was submitted locally by a user whose login name contained one
5603 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5604 It caused a spool format error. I have fixed the spool reading code. A
5605 related problem was that the "from" clause in the Received: line became
5606 illegal because of the space(s). It is now covered by ${quote_local_part.
5608 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5611 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5613 83. Patch from Sieve maintainer to fix unterminated string problem in
5614 "vacation" handling.
5616 84. Some minor changes to the Linux configuration files to help with other
5617 OS variants using glibc.
5619 85. One more patch for Sieve to update vacation handling to latest spec.
5622 ----------------------------------------------------
5623 See the note above about the 4.44 and 4.50 releases.
5624 ----------------------------------------------------
5630 1. Change 4.43/35 introduced a bug that caused file counts to be
5631 incorrectly computed when quota_filecount was set in an appendfile
5634 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5635 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5638 3. Give more explanation in the error message when the command for a transport
5639 filter fails to execute.
5641 4. There are several places where Exim runs a non-Exim command in a
5642 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5643 was being done only for the command run by the queryprogram router. It is
5644 now done for all such subprocesses. The other cases are: ${run, transport
5645 filters, and the commands run by the lmtp and pipe transports.
5647 5. Some older OS have a limit of 256 on the maximum number of file
5648 descriptors. Exim was using setrlimit() to set 1000 as a large value
5649 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5650 systems. I've change it so that if it can't get 1000, it tries for 256.
5652 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5653 was an oversight, and furthermore, ever since the addition of extra
5654 controls (e.g. 4.43/32), the checks on when to allow different forms of
5655 "control" were broken. There should now be diagnostics for all cases when a
5656 control that does not make sense is encountered.
5658 7. $recipients is now available in the predata ACL (oversight).
5660 8. Tidy the search cache before the fork to do a delivery from a message
5661 received from the command line. Otherwise the child will trigger a lookup
5662 failure and thereby defer the delivery if it tries to use (for example) a
5663 cached ldap connection that the parent has called unbind on.
5665 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5666 of $address_data from the recipient verification was clobbered by the
5667 sender verification.
5669 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5670 was its contents. (It was OK if the option was not defined at all.)
5672 11. A "Completed" log line is now written for messages that are removed from
5673 the spool by the -Mrm option.
5675 12. $host_address is now set to the target address during the checking of
5676 ignore_target_hosts.
5678 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5679 being passed; this would have caused $sender_host_name to have been used if
5680 matching the list had actually called for a host name (not very likely,
5681 since this list is usually IP addresses). A host name is now passed as
5684 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5685 code that specifies a non-restarting handler (typically sigaction() in
5686 modern systems) in an attempt to fix a rare and obscure crash bug.
5688 15. Narrowed the window for a race in the daemon that could cause it to ignore
5689 SIGCHLD signals. This is not a major problem, because they are used only to
5690 wake it up if nothing else does.
5692 16. A malformed maildirsize file could cause Exim to calculate negative values
5693 for the mailbox size or file count. Odd effects could occur as a result.
5694 The maildirsize information is now recalculated if the size or filecount
5697 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5698 support for a long time. Removed HAVE_SYS_VFS_H.
5700 18. Updated exipick to current release from John Jetmore.
5702 19. Allow an empty sender to be matched against a lookup in an address list.
5703 Previously the only cases considered were a regular expression, or an
5706 20. Exim went into a mad DNS lookup loop when doing a callout where the
5707 host was specified on the transport, if the DNS lookup yielded more than
5710 21. The RFC2047 encoding function was originally intended for short strings
5711 such as real names; it was not keeping to the 75-character limit for
5712 encoded words that the RFC imposes. It now respects the limit, and
5713 generates multiple encoded words if necessary. To be on the safe side, I
5714 have increased the buffer size for the ${rfc2047: expansion operator from
5717 22. Failure to deliver a bounce message always caused it to be frozen, even if
5718 there was an errors_to setting on the router. The errors_to setting is now
5721 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5722 canonical form (fully expanded) before being placed in
5723 $sender_host_address.
5725 24. Updated eximstats to version 1.33
5727 25. Include certificate and key file names in error message when GnuTLS fails
5728 to set them up, because the GnuTLS error message doesn't include the name
5729 of the failing file when there is a problem reading it.
5731 26. Expand error message when OpenSSL has problems setting up cert/key files.
5734 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5735 (this can affect the format of dates).
5737 28. exim_tidydb, when checking for the continued existence of a message for
5738 which it has found a message-specific retry record, was not finding
5739 messages that were in split spool directories. Consequently, it was
5740 deleting retry records that should have stayed in existence.
5742 29. eximstats updated to version 1.35
5743 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5744 1.35 - bugfix such that pie charts by volume are generated correctly
5746 30. The SPA authentication driver was not abandoning authentication and moving
5747 on to the next authenticator when an expansion was forced to fail,
5748 contradicting the general specification for all authenticators. Instead it
5749 was generating a temporary error. It now behaves as specified.
5751 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5752 (the order specifies the preference for clients). The order is now AES256,
5753 AES128, 3DES, ARCFOUR128.
5755 31. Small patch to Sieve code - explicitly set From: when generating an
5758 32. Exim crashed if a remote delivery caused a very long error message to be
5759 recorded - for instance if somebody sent an entire SpamAssassin report back
5760 as a large number of 550 error lines. This bug was coincidentally fixed by
5761 increasing the size of one of Exim's internal buffers (big_buffer) that
5762 happened as part of the Exiscan merge. However, to be on the safe side, I
5763 have made the code more robust (and fixed the comments that describe what
5766 33. Some experimental protocols are using DNS PTR records for new purposes. The
5767 keys for these records are domain names, not reversed IP addresses. The
5768 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5769 leaves it alone. Component reversal etc. now happens only for IP addresses.
5772 34. The host_aton() function is supposed to be passed a string that is known
5773 to be a valid IP address. However, in the case of IPv6 addresses, it was
5774 not checking this. This is a hostage to fortune. Exim now panics and dies
5775 if the condition is not met. A case was found where this could be provoked
5776 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5777 components; fortuitously, this particular loophole had already been fixed
5778 by change 4.50/55 or 4.44/33 above.
5780 If there are any other similar loopholes, the new check in host_aton()
5781 itself should stop them being exploited. The report I received stated that
5782 data on the command line could provoke the exploit when Exim was running as
5783 exim, but did not say which command line option was involved. All I could
5784 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5785 running as the user.
5788 35. There was a buffer overflow vulnerability in the SPA authentication code
5789 (which came originally from the Samba project). I have added a test to the
5790 spa_base64_to_bits() function which I hope fixes it.
5793 36. The daemon start-up calls getloadavg() while still root for those OS that
5794 need the first call to be done as root, but it missed one case: when
5795 deliver_queue_load_max is set with deliver_drop_privilege. This is
5796 necessary for the benefit of the queue runner, because there is no re-exec
5797 when deliver_drop_privilege is set.
5799 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5800 was in use, was not putting the data itself into the right store pool;
5801 consequently, it could be overwritten for a subsequent message in the same
5802 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5805 38. Sometimes the final signoff response after QUIT could fail to get
5806 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5807 < 0 before doing a fflush(). This bug looks as though it goes back to the
5808 introduction of TLS in release 3.20, but "sometimes" must have been rare
5809 because the tests only now provoked it.
5815 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5816 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5817 Now it returns an integer. A number of calls were still expecting a T/F
5818 return. Fortuitously, in all cases, the tests worked in OK situations,
5819 which is the norm. However, things would have gone wrong on any write
5820 failures on the smtp file descriptor. This function is used when sending
5821 messages over SMTP and also when doing verify callouts.
5823 2. When Exim is called to do synchronous delivery of a locally submitted
5824 message (the -odf or -odi options), it no longer closes stderr before doing
5827 3. Implemented the mua_wrapper option.
5829 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5831 5. Implemented the functions header_remove(), header_testname(),
5832 header_add_at_position(), and receive_remove_recipient(), and exported them
5835 6. If an ACL "warn" statement specified the addition of headers, Exim already
5836 inserted X-ACL-Warn: at the start if there was no header name. However, it
5837 was not making this test for the second and subsequent header lines if
5838 there were newlines in the string. This meant that an invalid header could
5839 be inserted if Exim was badly configured.
5841 7. Allow an ACL "warn" statement to add header lines at the start or after all
5842 the Received: headers, as well as at the end.
5844 8. Added the rcpt_4xx retry error code.
5846 9. Added postmaster_mailfrom=xxx to callout verification option.
5848 10. Added mailfrom=xxxx to the callout verification option, for verify=
5851 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5852 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5854 12. Inserted some casts to stop certain compilers warning when using pointer
5855 differences as field lengths or precisions in printf-type calls (mostly
5856 affecting debugging statements).
5858 13. Added optional readline() support for -be (dynamically loaded).
5860 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5861 same clock tick as a message's arrival, so that its received time was the
5862 same as the "first fail" time on the retry record, and that message
5863 remained on the queue past the ultimate address timeout, every queue runner
5864 would try a delivery (because it was past the ultimate address timeout) but
5865 after another failure, the ultimate address timeout, which should have then
5866 bounced the address, did not kick in. This was a "< instead of <=" error;
5867 in most cases the first failure would have been in the next clock tick
5868 after the received time, and all would be well.
5870 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5871 being recognized when the domain list was tested by the match_domain
5872 condition in an expansion string.
5874 16. Added the ${str2b64: operator.
5876 17. Exim was always calling setrlimit() to set a large limit for the number of
5877 processes, without checking whether the existing limit was already
5878 adequate. (It did check for the limit on file descriptors.) Furthermore,
5879 errors from getrlimit() and setrlimit() were being ignored. Now they are
5880 logged to the main and panic logs, but Exim does carry on, to try to do its
5881 job under whatever limits there are.
5883 18. Imported PCRE 5.0.
5885 19. Trivial typo in log message " temporarily refused connection" (the leading
5888 20. If the log selector return_path_on_delivery was set and an address was
5889 redirected to /dev/null, the delivery process crashed because it assumed
5890 that a return path would always be set for a "successful" delivery. In this
5891 case, the whole delivery is bypassed as an optimization, and therefore no
5894 21. Internal re-arrangement: the function for sending a challenge and reading
5895 a response while authentication was assuming a zero-terminated challenge
5896 string. It's now changed to take a pointer and a length, to allow for
5897 binary data in such strings.
5899 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5901 23. Exim was not respecting finduser_retries when seeking the login of the
5902 uid under which it was called; it was always trying 10 times. (The default
5903 setting of finduser_retries is zero.) Also, it was sleeping after the final
5904 failure, which is pointless.
5906 24. Implemented tls_on_connect_ports.
5908 25. Implemented acl_smtp_predata.
5910 26. If the domain in control=submission is set empty, Exim assumes that the
5911 authenticated id is a complete email address when it generates From: or
5912 Sender: header lines.
5914 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5915 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5916 chown and chgrp in /bin and hostname in /usr/bin.
5918 28. Exim was keeping the "process log" file open after each use, just as it
5919 does for the main log. This opens the possibility of it remaining open for
5920 long periods when the USR1 signal hits a daemon. Occasional processlog
5921 errors were reported, that could have been caused by this. Anyway, it seems
5922 much more sensible not to leave this file open at all, so that is what now
5925 29. The long-running daemon process does not normally write to the log once it
5926 has entered its main loop, and it closes the log before doing so. This is
5927 so that log files can straightforwardly be renamed and moved. However,
5928 there are a couple of unusual error situations where the daemon does write
5929 log entries, and I had neglected to close the log afterwards.
5931 30. The text of an SMTP error response that was received during a remote
5932 delivery was being truncated at 512 bytes. This is too short for some of
5933 the long messages that one sometimes sees. I've increased the limit to
5936 31. It is now possible to make retry rules that apply only when a message has a
5937 specific sender, in particular, an empty sender.
5939 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5940 it possible to be selective about when SMTP synchronization is enforced.
5942 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5944 32. Implemented hosts_connection_nolog.
5946 33. Added an ACL for QUIT.
5948 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5951 35. Added mailbox_size and mailbox_filecount to appendfile.
5953 36. Added control = no_multiline_responses to ACLs.
5955 37. There was a bug in the logic of the code that waits for the clock to tick
5956 in the case where the clock went backwards by a substantial amount such
5957 that the microsecond fraction of "now" was more than the microsecond
5958 fraction of "then" (but the whole seconds number was less).
5960 38. Added support for the libradius Radius client library this is found on
5961 FreeBSD (previously only the radiusclient library was supported).
5967 1. When certain lookups returned multiple values in the form name=value, the
5968 quoting of the values was not always being done properly. Specifically:
5969 (a) If the value started with a double quote, but contained no whitespace,
5971 (b) If the value contained whitespace other than a space character (i.e.
5972 tabs or newlines or carriage returns) it was not quoted.
5973 This fix has been applied to the mysql and pgsql lookups by writing a
5974 separate quoting function and calling it from the lookup code. The fix
5975 should probably also be applied to nisplus, ibase and oracle lookups, but
5976 since I cannot test any of those, I have not disturbed their existing code.
5978 2. A hit in the callout cache for a specific address caused a log line with no
5979 reason for rejecting RCPT. Now it says "Previous (cached) callout
5980 verification failure".
5982 3. There was an off-by-one bug in the queryprogram router. An over-long
5983 return line was truncated at 256 instead of 255 characters, thereby
5984 overflowing its buffer with the terminating zero. As well as fixing this, I
5985 have increased the buffer size to 1024 (and made a note to document this).
5987 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5988 when Exim is waiting for an SMTP response from a remote server, Exim
5989 restarts its select() call on the socket, thereby resetting its timeout.
5990 This is not a problem when such interrupts are rare. Somebody set up a cron
5991 job to run exiwhat every 2 minutes, which is less than the normal select()
5992 timeout (5 or 10 minutes). This meant that the select() timeout never
5993 kicked in because it was always reset. I have fixed this by comparing the
5994 time when an interrupt arrives with the time at the start of the first call
5995 to select(). If more time than the timeout has elapsed, the interrupt is
5996 treated as a timeout.
5998 5. Some internal re-factoring in preparation for the addition of Sieve
5999 extensions (by MH). In particular, the "personal" test is moved to a
6000 separate function, and given an option for scanning Cc: and Bcc: (which is
6001 not set for Exim filters).
6003 6. When Exim created an email address using the login of the caller as the
6004 local part (e.g. when creating a From: or Sender: header line), it was not
6005 quoting the local part when it contained special characters such as @.
6007 7. Installed new OpenBSD configuration files.
6009 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6010 try to make them clearer.
6012 9. Callout options, other than the timeout value, were being ignored when
6013 verifying sender addresses in header lines. For example, when using
6015 verify = header_sender/callout=no_cache
6017 the cache was (incorrectly) being used.
6019 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6020 only the Cygwin environment.
6022 11. When return_path_on_delivery was set as a log selector, if different remote
6023 addresses in the same message used different return paths and parallel
6024 remote delivery occurred, the wrong values would sometimes be logged.
6025 (Whenever a remote delivery process finished, the return path value from
6026 the most recently started remote delivery process was logged.)
6028 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6029 lines when AUTH and/or TLS are in use. This is the "received protocol"
6030 field. Exim used to use "asmtp" for authenticated SMTP, without any
6031 indication (in the protocol name) for TLS use. Now it follows the RFC and
6032 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6033 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6034 names appear in log lines as well as in Received: header lines.
6036 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6037 extensions, and comparison tests, and to fix some bugs.
6039 14. Changes to the "personal" filter test:
6041 (1) The test was buggy in that it was just doing the equivalent of
6042 "contains" tests on header lines. For example, if a user's address was
6043 anne@some.where, the "personal" test would incorrectly be true for
6045 To: susanne@some.where
6047 This test is now done by extracting each address from the header in turn,
6048 and checking the entire address. Other tests that are part of "personal"
6049 are now done using regular expressions (for example, to check local parts
6050 of addresses in From: header lines).
6052 (2) The list of non-personal local parts in From: addresses has been
6053 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6054 taken from the Sieve specification recommendations.
6056 (3) If the message contains any header line starting with "List-" it is
6057 treated as non-personal.
6059 (4) The test for "circular" in the Subject: header line has been removed
6060 because it now seems ill-conceived.
6062 15. Minor typos in src/EDITME comments corrected.
6064 16. Installed latest exipick from John Jetmore.
6066 17. If headers_add on a router specified a text string that was too long for
6067 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6068 of string_sprintf() is now avoided.
6070 18. $message_body_size was not set (it was always zero) when running the DATA
6071 ACL and the local_scan() function.
6073 19. For the "mail" command in an Exim filter, no default was being set for
6074 the once_repeat time, causing a random time value to be used if "once" was
6075 specified. (If the value happened to be <= 0, no repeat happened.) The
6076 default is now 0s, meaning "never repeat". The "vacation" command was OK
6077 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6078 (I found it when inspecting the code).
6080 20. There is now an overall timeout for performing a callout verification. It
6081 defaults to 4 times the callout timeout, which applies to individual SMTP
6082 commands during the callout. The overall timeout applies when there is more
6083 than one host that can be tried. The timeout is checked before trying the
6084 next host. This prevents very long delays if there are a large number of
6085 hosts and all are timing out (e.g. when the network connections are timing
6086 out). The value of the overall timeout can be changed by specifying an
6087 additional sub-option for "callout", called "maxwait". For example:
6089 verify = sender/callout=5s,maxwait=20s
6091 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6092 to the end before writing, but this should make it even safer).
6094 22. Exim was forgetting that it had advertised PIPELINING for the second and
6095 subsequent messages on an SMTP connection. It was also not resetting its
6096 memory on STARTTLS and an internal HELO.
6098 23. When Exim logs an SMTP synchronization error within a session, it now
6099 records whether PIPELINING has been advertised or not.
6101 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6102 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6103 rather than long int.
6105 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6107 26. Added the never_mail option to autoreply.
6113 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6114 crash if the getsockname() call failed; this can happen if a connection is
6115 closed very soon after it is established. The problem was simply in the
6116 order in which certain operations were done, causing Exim to try to write
6117 to the SMTP stream before it had set up the file descriptor. The bug has
6118 been fixed by making things happen in the correct order.
6124 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6125 before the connection was closed, thus losing the rejection response.
6127 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6128 some early Solaris releases, but causes trouble in current releases where
6129 socklen_t is defined.
6131 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6134 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6137 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6138 that releasing the top of it at the end releases what was used for sub-
6139 expansions (unless the block got too big). However, discard this block if
6140 the first thing is a variable or header, so that we can use its block when
6141 it is dynamic (useful for very large $message_headers, for example).
6143 6. Lookups now cache *every* query, not just the most recent. A new, separate
6144 store pool is used for this. It can be recovered when all lookup caches are
6145 flushed. Lookups now release memory at the end of their result strings.
6146 This has involved some general refactoring of the lookup sources.
6148 7. Some code has been added to the store_xxx() functions to reduce the amount
6149 of flapping under certain conditions.
6151 8. log_incoming_interface used to affect only the <= reception log lines. Now
6152 it causes the local interface and port to be added to several more SMTP log
6153 lines, for example "SMTP connection from", and rejection lines.
6155 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6157 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6159 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6160 could be overwritten at the end of the current message (or the start of a
6161 new message if it was set in a HELO ACL). The value is now preserved for
6162 the duration of the SMTP connection.
6164 12. If a transport had a headers_rewrite setting, and a matching header line
6165 contained an unqualified address, that address was qualified, even if it
6166 did not match any rewriting rules. The underlying bug was that the values
6167 of the flags that permit the existence of unqualified sender and recipient
6168 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6169 non-local messages, and by -bnq for local messages) were not being
6170 preserved with the message after it was received.
6172 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6173 "next input=" as part of the text comprising the host identity instead of
6174 the correct text. The code was using the same buffer for two different
6175 strings. However, depending on which order the printing function evaluated
6176 its arguments, the bug did not always show up. Under Linux, for example, my
6177 test suite worked just fine.
6179 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6180 doesn't work with some older versions of Perl. It has been changed to "my",
6181 which in any case is probably the better facility to use.
6183 15. A really picky compiler found some instances of statements for creating
6184 error messages that either had too many or two few arguments for the format
6187 16. The size of the buffer for calls to the DNS resolver has been increased
6188 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6189 for addresses that have a lot of PTR records. This alleviates a problem; it
6190 does not fully solve it.
6192 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6193 buffer now truncates the list and logs the incident, which is the same
6194 action as happens when Exim is looking up a host name and its aliases.
6195 Previously in this situation something unpredictable would happen;
6196 sometimes it was "internal error: store_reset failed".
6198 18. If a server dropped the connection unexpectedly when an Exim client was
6199 using GnuTLS and trying to read a response, the client delivery process
6200 crashed while trying to generate an error log message.
6202 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6203 string, for example:
6205 warn message = H1: something\nH2: something
6207 the text was added as a single header line from Exim's point of view
6208 though it ended up OK in the delivered message. However, searching for the
6209 second and subsequent header lines using $h_h2: did not work. This has been
6210 fixed. Similarly, if a system filter added multiple headers in this way,
6211 the routers could not see them.
6213 20. Expanded the error message when iplsearch is called with an invalid key to
6214 suggest using net-iplsearch in a host list.
6216 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6217 ACLs are no longer actually imposed (and a message to that effect is
6220 22. If a "gecos" field in a passwd entry contained escaped characters, in
6221 particular, if it contained a \" sequence, Exim got it wrong when building
6222 a From: or a Sender: header from that name. A second bug also caused
6223 incorrect handling when an unquoted " was present following a character
6224 that needed quoting.
6226 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6227 was not being matched caselessly.
6229 24. Arranged for all hyphens in the exim.8 source to be escaped with
6232 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6233 properly. Recipient callout cache records were still being keyed to include
6234 the sender, even when use_sender was set false. This led to far more
6235 callouts that were necessary. The sender is no longer included in the key
6236 when use_sender is false.
6238 26. Added "control = submission" modifier to ACLs.
6240 27. Added the ${base62d: operator to decode base 62 numbers.
6242 28. dnsdb lookups can now access SRV records.
6244 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6245 the configuration file.
6247 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6248 (-v) mode. This makes the output for a verbose queue run more intelligible.
6250 31. Added a use_postmaster feature to recipient callouts.
6252 32. Added the $body_zerocount variable, containing the number of binary zero
6253 bytes in the message body.
6255 33. The time of last modification of the "new" subdirectory is now used as the
6256 "mailbox time last read" when there is a quota error for a maildir
6259 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6261 35. Added +ignore_unknown as a special item in host lists.
6263 36. Code for decoding IPv6 addresses in host lists is now included, even if
6264 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6265 address was recognized as an IP address, but was then not correctly decoded
6266 into binary, causing unexpected and incorrect effects when compared with
6273 1. Very minor rewording of debugging text in manualroute to say "list of
6274 hosts" instead of "hostlist".
6276 2. If verify=header_syntax was set, and a header line with an unqualified
6277 address (no domain) and a large number of spaces between the end of the
6278 name and the colon was received, the reception process suffered a buffer
6279 overflow, and (when I tested it) crashed. This was caused by some obsolete
6280 code that should have been removed. The fix is to remove it!
6282 3. When running in the test harness, delay a bit after writing a bounce
6283 message to get a bit more predictability in the log output.
6285 4. Added a call to search_tidyup() just before forking a reception process. In
6286 theory, someone could use a lookup in the expansion of smtp_accept_max_
6287 per_host which, without the tidyup, could leave open a database connection.
6289 5. Added the variables $recipient_data and $sender_data which get set from a
6290 lookup success in an ACL "recipients" or "senders" condition, or a router
6291 "senders" option, similar to $domain_data and $local_part_data.
6293 6. Moved the writing of debug_print from before to after the "senders" test
6296 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6297 problems for message scanning, either using a data ACL, or using
6298 local_scan() because the Received: header was not generated till after they
6299 were called (in order to set the time as the time of reception completion).
6300 I have revised the way this works. The header is now generated after the
6301 body is received, but before the ACL or local_scan() are called. After they
6302 are run, the timestamp in the header is updated.
6308 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6309 before starting a queue runner without re-exec. This happened only when
6310 deliver_drop_privilege was set or when the Exim user was set to root. The
6311 effect of the bug was that timeouts during subsequent deliveries caused
6312 crashes instead of being properly handled. The handler is now left at its
6313 default (and expected) setting.
6315 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6316 message, again when deliver_drop_privilege is set or Exim is run as root.
6317 The bug described in (1) was not present in this case, but the tidying up
6318 of the other signals was missing. I have made the two cases consistent.
6320 3. The ignore_target_hosts setting on a manualroute router was being ignored
6321 for hosts that were looked up using the /MX notation.
6323 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6326 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6327 operated on the sender address. After changing the $sender_address to <>
6328 for the sender address verify, Exim was re-instated it as the original
6329 (before rewriting) address, but remembering that it had rewritten it, so it
6330 wasn't rewriting it again. This bug also had the effect of breaking the
6331 sender address verification caching when the sender address was rewritten.
6333 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6334 This has been changed so that if the ip literal address matches
6335 ignore_target_hosts, the router declines.
6337 7. Added expansion conditions match_domain, match_address, and match_local_
6338 part (NOT match_host).
6340 8. The placeholder for the Received: header didn't have a length field set.
6342 9. Added code to Exim itself and to exim_lock to test for a specific race
6343 condition that could lead to file corruption when using MBX delivery. The
6344 issue is with the lockfile that is created in /tmp. If this file is removed
6345 after a process has opened it but before that process has acquired a lock,
6346 there is the potential for a second process to recreate the file and also
6347 acquire a lock. This could lead to two Exim processes writing to the file
6348 at the same time. The added code performs the same test as UW imapd; it
6349 checks after acquiring the lock that its file descriptor still refers to
6350 the same named file.
6352 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6353 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6356 11. Added the smtp_active_hostname option. If used, this will typically be made
6357 to depend on the incoming interface address. Because $interface_address is
6358 not set up until the daemon has forked a reception process, error responses
6359 that can happen earlier (such as "too many connections") no longer contain
6362 12. If an expansion in a condition on a "warn" statement fails because a lookup
6363 defers, the "warn" statement is abandoned, and the next ACL statement is
6364 processed. Previously this caused the whole ACL to be aborted.
6366 13. Added the iplsearch lookup type.
6368 14. Added ident_timeout as a log selector.
6370 15. Added tls_certificate_verified as a log selector.
6372 16. Added a global option tls_require_ciphers (compare the smtp transport
6373 option of the same name). This controls incoming TLS connections.
6375 17. I finally figured out how to make tls_require_ciphers do a similar thing
6376 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6377 before starting the TLS session.
6379 18. Tabs are now shown as \t in -bP output.
6381 19. If the log selector return_path_on_delivery was set, Exim crashed when
6382 bouncing a message because it had too many Received: header lines.
6384 20. If two routers both had headers_remove settings, and the first one included
6385 a superfluous trailing colon, the final name in the first list and the
6386 first name in the second list were incorrectly joined into one item (with a
6387 colon in the middle).
6393 1. Added -C and -D options to the exinext utility, mainly to make it easier
6394 to include in the automated testing, but these could be helpful when
6395 multiple configurations are in use.
6397 2. The exinext utility was not formatting the output nicely when there was
6398 an alternate port involved in the retry record key, nor when there was a
6399 message id as well (for retries that were specific to a specific message
6400 and a specific host). It was also confused by IPv6 addresses, because of
6401 the additional colons they contain. I have fixed the IPv4 problem, and
6402 patched it up to do a reasonable job for IPv6.
6404 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6405 delivery, the log line now contains "pipelined" if PIPELINING was used.
6407 4. An SMTP transport process used to panic and die if the bind() call to set
6408 an explicit outgoing interface failed. This has been changed; it is now
6409 treated in the same way as a connect() failure.
6411 5. A reference to $sender_host_name in the part of a conditional expansion
6412 that was being skipped was still causing a DNS lookup. This no longer
6415 6. The def: expansion condition was not recognizing references to header lines
6416 that used bh_ and bheader_.
6418 7. Added the _cache feature to named lists.
6420 8. The code for checking quota_filecount in the appendfile transport was
6421 allowing one more file than it should have been.
6423 9. For compatibility with Sendmail, the command line option
6431 and sets the incoming protocol and host name (for trusted callers). The
6432 host name and its colon can be omitted when only the protocol is to be set.
6433 Note the Exim already has two private options, -pd and -ps, that refer to
6434 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6435 "s", but I don't think that's a major issue.
6437 10. A number of refactoring changes to the code, none of which should affect
6440 (a) The number of logging options was getting close to filling up the
6441 32-bit word that was used as a bit map. I have split them into two classes:
6442 those that are passed in the argument to log_write(), and those that are
6443 only ever tested independently outside of that function. These are now in
6444 separate 32-bit words, so there is plenty of room for expansion again.
6445 There is no change in the user interface or the logging behaviour.
6447 (b) When building, for example, log lines, the code previously used a
6448 macro that called string_cat() twice, in order to add two strings. This is
6449 not really sufficiently general. Furthermore, there was one instance where
6450 it was actually wrong because one of the argument was used twice, and in
6451 one call a function was used. (As it happened, calling the function twice
6452 did not affect the overall behaviour.) The macro has been replaced by a
6453 function that can join an arbitrary number of extra strings onto a growing
6456 (c) The code for expansion conditions now uses a table and a binary chop
6457 instead of a serial search (which was left over from when there were very
6458 few conditions). Also, it now recognizes conditions like "pam" even when
6459 the relevant support is not compiled in: a suitably worded error message is
6460 given if an attempt is made to use such a condition.
6462 11. Added ${time_interval:xxxxx}.
6464 12. A bug was causing one of the ddress fields not to be passed back correctly
6465 from remote delivery subprocesses. The field in question was not being
6466 subsequently used, so this caused to problems in practice.
6468 13. Added new log selectors queue_time and deliver_time.
6470 14. Might have fixed a bug in maildirsizefile handling that threw up
6471 "unexpected character" debug warnings, and recalculated the data
6472 unnecessarily. In any case, I expanded the warning message to give more
6475 15. Added the message "Restricted characters in address" to the statements in
6476 the default ACL that block characters like @ and % in local parts.
6478 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6479 Three changes have been made:
6481 (a) There was a serious bug; a negative response to MAIL caused the whole
6482 recipient domain to be cached as invalid, thereby blocking all messages
6483 to all local parts at the same domain, from all senders. This bug has
6484 been fixed. The domain is no longer cached after a negative response to
6485 MAIL if the sender used is not empty.
6487 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6490 (c) A new callout option, "use_sender" has been added for people who want
6491 the modified behaviour.
6497 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6500 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6501 indeed breaks things for older releases.
6503 3. Added additional logging to the case where there is a problem reading data
6504 from a filter that is running in a subprocess using a pipe, in order to
6505 try to track down a specific problem.
6507 4. Testing facility fudge: when running in the test harness and attempting
6508 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6509 getting "No route to host". Convert this to a timeout.
6511 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6514 6. Some OS don't have socklen_t but use size_t instead. This affects the
6515 fifth argument of getsockopt() amongst other things. This is now
6516 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6517 can be set for individual OS. I have set it for SunOS5, OSF1, and
6518 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6519 some earlier ones do not.
6521 7. Change 4.30/15 was not doing the test caselessly.
6523 8. The standard form for an IPv6 address literal was being rejected by address
6524 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6525 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6526 this, as well as the form without the "IPv6" on the front (but only when
6527 address literals are enabled, of course).
6529 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6531 10. Exim crashed if a message with an empty sender address specified by -f
6532 encountered a router with an errors_to setting. This could be provoked only
6533 by a command such as
6537 where an empty string was supplied; "<>" did not hit this bug.
6539 11. Installed PCRE release 4.5.
6541 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6542 remained set. It is now erased.
6544 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6545 times from message ids (which are base 36 rather than the normal 62).
6547 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6548 were being counted as actual protocol errors, and logged if the log
6549 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6550 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6551 and DATA following a set of rejected RCPTs do not count as protocol errors.
6552 In other words, Exim assumes they were pipelined, though this may not
6553 actually be the case. Of course, in all cases the client gets an
6554 appropriate error code.
6556 15. If a lookup fails in an ACL condition, a message about the failure may
6557 be available; it is used if testing the ACL cannot continue, because most
6558 such messages specify what the cause of the deferral is. However, some
6559 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6560 that caused an old message to be retained and used if a later statement
6561 caused a defer, replacing the real cause of the deferral.
6563 16. If an IP address had so many PTR records that the DNS lookup buffer
6564 was not large enough to hold them, Exim could crash while trying to process
6565 the truncated data. It now detects and logs this case.
6567 17. Further to 4.21/58, another change has been made: if (and only if) the
6568 first line of a message (the first header line) ends with CRLF, a bare LF
6569 in a subsequent header line has a space inserted after it, so as not to
6570 terminate the header.
6572 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6573 unnecessarily, used atoi() instead of strtol(), and didn't check the
6574 termination when getting file sizes from file names by regex.
6576 19. Completely re-implemented the support for maildirsize files, in the light
6577 of a number of problems with the previous contributed implementation
6578 (4.30/29). In particular:
6580 . If the quota is zero, the maildirsize file is maintained, but no quota is
6583 . If the maildir directory does not exist, it is created before any attempt
6584 to write a maildirsize file.
6586 . The quota value in the file is just a cache; if the quota is changed in
6587 the transport, the new value overrides.
6589 . A regular expression is available for excluding directories from the
6592 20. The autoreply transport checks the characters in options that define the
6593 message's headers; it allows continued headers, but it was checking with
6594 isspace() after an embedded newline instead of explicitly looking for a
6597 21. If all the "regular" hosts to which an address was routed had passed their
6598 expiry times, and had not reached their retry times, the address was
6599 bounced, even if fallback hosts were defined. Now Exim should go on to try
6602 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6603 equivalent code in the SMTP transport. Some hosts send humungous responses
6604 to HELO/EHLO, more than 1024 it seems.
6606 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6607 gives compiler warnings in some environments. I've now done it "properly",
6610 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6611 (because of problems with the built-in one) was declared to return uschar *
6612 instead of char *, causing compiler failure.
6614 25. Fixed a file descriptor leak when processing alias/forward files.
6616 26. Fixed a minor format string issue in dbfn.c.
6618 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6620 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6621 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6624 29. When a sender address is verified, it is cached, to save repeating the test
6625 when there is more than one recipient in a message. However, when the
6626 verification involves a callout, it is possible for different callout
6627 options to be set for different recipients. It is too complicated to keep
6628 track of this in the cache, so now Exim always runs a verification when a
6629 callout is required, relying on the callout cache for the optimization.
6630 The overhead is duplication of the address routing, but this should not be
6633 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6634 to be verified with callout=postmaster, and the main callout worked but the
6635 postmaster check failed, the verification correctly failed. However, if a
6636 subsequent RCPT command asked for sender verification *without* the
6637 postmaster check, incorrect caching caused this verification also to fail,
6640 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6641 it was not caching the DNS options (qualify_single, search_parents) that
6642 were used when the lookup failed. A subsequent lookup with different
6643 options therefore always gave the same answer, though there were cases
6644 where it should not have. (Example: a "domains = !$mx_any" option on a
6645 dnslookup router: the "domains" option is always processed without any
6646 widening, but the router might have qualify_single set.) Now Exim uses the
6647 cached value only when the same options are set.
6649 32. Added John Jetmore's "exipick" utility to the distribution.
6651 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6652 than a timeout (e.g. a certificate is required, and is not provided), an
6653 Exim server now closes the connection immediately. Previously it waited for
6654 the client to close - but if the client is SSL, it seems that they each
6655 wait for each other, leading to a delay before one of them times out.
6657 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6658 maintained 0.8.x compatibility because I don't think many are using it, and
6659 it is clearly obsolete.
6661 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6664 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6665 client certificate was expired. A simple patch fixes this, though I don't
6666 understand the full logic of why the verify callback is called multiple
6669 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6670 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6671 which causes problems with some clients (such as the Certicom SSL Plus
6672 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6673 disables the coutermeasure allowing Eudora to connect."
6675 38. Exim was not checking that a write() to a log file succeeded. This could
6676 lead to Bad Things if a log got too big, in particular if it hit a file
6677 size limit. Exim now panics and dies if it cannot write to a log file, just
6678 as it does if it cannot open a log file.
6680 39. Modified OS/Makefile-Linux so that it now contains
6682 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6684 The two -D definitions ensure that Exim is compiled with large file
6685 support, which makes it possible to handle log files that are bigger than
6688 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6689 instance) a domain was checked against a named list that involved a lookup,
6690 causing $domain_data to be set, then another domain was checked against the
6691 same list, then the first domain was re-checked, the value of $domain_data
6692 after the final check could be wrong. In particular, if the second check
6693 failed, it could be set empty. This bug probably also applied to
6696 41. The strip_trailing_dot option was not being applied to the address given
6697 with the -f command-line option.
6699 42. The code for reading a message's header from the spool was incrementing
6700 $received_count, but never initializing it. This meant that the value was
6701 incorrect (doubled) while delivering a message in the same process in which
6702 it was received. In the most common configuration of Exim, this never
6703 happens - a fresh exec is done - but it can happen when
6704 deliver_drop_privilege is set.
6706 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6707 it now includes up to 150 characters of the unexpected data in the log
6710 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6711 and building data strings. The size of both of these buffers was 10 000
6712 bytes - far larger than anybody would *ever* want, thought I. Needless to
6713 say, somebody hit the limit. I have increased the maximum line length to
6714 20 000 and the maximum data length of concatenated lines to 100 000. I have
6715 also fixed two bugs, because there was no checking on these buffers. Tsk,
6716 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6717 buffer is too small.
6719 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6720 lsearch lookups. Now it does.
6722 46. When parsing a route_list item in a manualroute router, a fixed-length
6723 buffer was used for the list of hosts. I made this 1024 bytes long,
6724 thinking that nobody would ever have a list of hosts that long. Wrong.
6725 Somebody had a whole pile of complicated expansion conditions, and the
6726 string was silently truncated, leading to an expansion error. It turns out
6727 that it is easier to change to an unlimited length (owing to other changes
6728 that have happened since this code was originally written) than to build
6729 structure for giving a limitation error. The length of the item that
6730 expands into the list of hosts is now unlimited.
6732 47. The lsearch lookup could not handle data where the length of text line was
6733 more than 4095 characters. Such lines were truncated, leading to shortened
6734 data being returned. It should now handle lines of any length.
6736 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6737 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6740 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6741 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6742 no longer happens in comment lines. A list of replacements is now placed
6743 at the head of all of the source files, except those whose only change is
6744 to replace PERL_COMMAND in the very first #! line.
6746 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6747 messages on the queue, with a bottom-up merge sort, using code contributed
6748 by Michael Haardt. This should make operations like -bp somewhat faster on
6749 large queues. It won't affect queue runners, except when queue_run_in_order
6752 51. Installed eximstats 1.31 in the distribution.
6754 52. Added support for SRV lookups to the dnslookup router.
6756 53. If an ACL referred to $message_body or $message_body_end, the value was not
6757 reset for any messages that followed in the same SMTP session.
6759 54. The store-handling optimization for building very long strings was not
6760 differentiating between the different store pools. I don't think this
6761 actually made any difference in practice, but I've tidied it.
6763 55. While running the routers to verify a sender address, $sender_address
6764 was still set to the sender address. This is wrong, because when routing to
6765 send a bounce to the sender, it would be empty. Therefore, I have changed
6766 it so that, while verifying a sender address, $sender_address is set to <>.
6767 (There is no change to what happens when verifying a recipient address.)
6769 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6770 target A or AAAA records (if not already returned) without resetting the
6771 qualify_single or search_parents options of the DNS resolver. These are
6772 inappropriate in this case because the targets of MX and SRV records must
6773 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6774 target that, when qualified, matched something in the local domain. These
6775 two options are now turned off when doing these lookups.
6777 57. It seems that at least some releases of Reiserfs (which does not have the
6778 concept of a fixed number of inodes) returns zero and not -1 for the
6779 number of available inodes. This interacted badly with check_spool_inodes,
6780 which assumed that -1 was the "no such thing" setting. What I have done is
6781 to check that the total number of inodes is greater than zero before doing
6782 the test of how many are available.
6784 58. When a "warn" ACL statement has a log_message modifier, the message is
6785 remembered, and not repeated. This is to avoid a lot of repetition when a
6786 message has many recipients that cause the same warning to be written.
6787 However, Exim was preserving the list of already written lines for an
6788 entire SMTP session, which doesn't seem right. The memory is now reset if a
6789 new message is started.
6791 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6792 debugging output unless log_rewrite was also set.
6794 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6795 of (int)(handle) when we know that handle contains (void *)(-1).
6797 61. The Exim daemon panic-logs an error return when it closes the incoming
6798 connection. However "connection reset by peer" seems to be common, and
6799 isn't really an error worthy of noting specially, so that particular error
6802 62. When Exim is trying to find all the local interfaces, it used to panic and
6803 die if the ioctl to get the interface flags failed. However, it seems that
6804 on at least one OS (Solaris 9) it is possible to have an interface that is
6805 included in the list of interfaces, but for which you get a failure error
6806 for this call. This happens when the interface is not "plumbed" into a
6807 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6808 failure of the "get flags" call assumes that the interface is down.
6810 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6811 makes life easier for people who are doing arithmetic on fields extracted
6812 from dates, where you often get leading zeros that should not be
6813 interpreted as octal.
6815 64. Added qualify_domain to the redirect router, to override the global
6818 65. If a pathologically long header line contained very many addresses (the
6819 report of this problem mentioned 10 000) and each of them was rewritten,
6820 Exim could use up a very large amount of memory. (It kept on making new
6821 copies of the header line as it rewrote, and never released the old ones.)
6822 At the expense of a bit more processing, the header rewriting function has
6823 been changed so that it no longer eats memory in this way.
6825 66. The generation of the Received: header has been moved from the time that a
6826 message starts to be received, to the time that it finishes. The timestamp
6827 in the Received: header should now be very close to that of the <= log
6828 line. There are two side-effects of this change:
6830 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6831 logged header lines no longer include the local Received: line, because
6832 it has not yet been created. The same applies to a copy of the message
6833 that is returned to a non-SMTP sender when a message is rejected.
6835 (b) When a filter file is tested using -bf, no additional Received: header
6836 is added to the test message. After some thought, I decided that this
6839 This change does not affect the value of $received_for. It is still set
6840 after address rewriting, but before local_scan() is called.
6842 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6844 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6845 gave an unhelpful panic error message, and a defer error. I have managed to
6846 change this behaviour so that it now rejects any supplied certificate,
6847 which seems right, as the list of acceptable certificates is empty.
6849 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6850 gave an unhelpful defer error. I have not managed to make this reject any
6851 supplied certificates, but the error message it gives is "no certificate
6852 supplied", which is not helpful.
6854 70. exigrep's output now also includes lines that are not associated with any
6855 message, but which match the given pattern. Implemented by a patch from
6856 Martin Sluka, which also tidied up the Perl a bit.
6858 71. Recipient callout verification, like sender verification, was using <> in
6859 the MAIL FROM command. This isn't really the right thing, since the actual
6860 sender may affect whether the remote host accepts the recipient or not. I
6861 have changed it to use the actual sender in the callout; this means that
6862 the cache record is now keyed on a recipient/sender pair, not just the
6863 recipient address. There doesn't seem to be a real danger of callout loops,
6864 since a callout by the remote host to check the sender would use <>.
6865 [SEE ABOVE: changed after hitting problems.]
6867 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6868 temporary errors. However, in the case of such a code being given after
6869 the end of a data transmission (i.e. after ".") Exim was failing to write
6870 a retry record for the message. (Yes, there was some broken host that was
6871 actually sending 8xx at this point.)
6873 73. An unknown lookup type in a host list could cause Exim to panic-die when
6874 the list was checked. (An example that provoked this was putting <; in the
6875 middle of a list instead of at the start.) If this happened during a DATA
6876 ACL check, a -D file could be left lying around. This kind of configuration
6877 error no longer causes Exim to die; instead it causes a defer error. The
6878 incident is still logged to the main and panic logs.
6880 74. Buglet left over from Exim 3 conversion. The message "too many messages
6881 in one connection" was written to the rejectlog but not the mainlog, except
6882 when address rewriting (yes!) was being logged.
6884 75. Added write_rejectlog option.
6886 76. When a system filter was run not as root (that is, when system_filter_user
6887 was set), the values of the $n variables were not being returned to the
6888 main process; thus, they were not subsequently available in the $sn
6891 77. Added +return_path_on_delivery log selector.
6893 78. A connection timeout was being treated differently from recipients deferred
6894 when testing hosts_max_try with a message that was older than the host's
6895 retry timeout. (The host should not be counted, thus allowing all hosts to
6896 be tried at least once before bouncing.) This may have been the cause of an
6897 occasionally reported bug whereby a message would remain on the queue
6898 longer than the retry timeout, but would be bounced if a delivery was
6899 forced. I say "may" because I never totally pinned down the problem;
6900 setting up timeout/retry tests is difficult. See also the next item.
6902 79. The ultimate address timeout was not being applied to errors that involved
6903 a combination of host plus message (for example, a timeout on a MAIL
6904 command). When an address resolved to a number of possible hosts, and they
6905 were not all tried for each delivery (e.g. because of hosts_max_try), a
6906 message could remain on the queue longer than the retry timeout.
6908 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6911 81. Fixed an obscure SMTP outgoing bug which required at least the following
6912 conditions: (a) there was another message waiting for the same server;
6913 (b) the server returned 5xx to all RCPT commands in the first message so
6914 that the message was not completed; (c) the server dropped the connection
6915 or gave a negative response to the RSET that Exim sends to abort the
6916 transaction. The observed case was a dropped connection after DATA that had
6917 been sent in pipelining mode. That is, the server had advertised PIPELINING
6918 but was not implementing it correctly. The effect of the bug was incorrect
6919 behaviour, such as trying another host, and this could lead to a crash.
6925 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6926 and daemon.c were passed as pointers to ints; they should have been
6927 pointers to socklen_t variables (which are typically unsigned ints).
6929 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6932 3. Fixed a really odd bug that affected only the testing scheme; patching a
6933 certain fixed string in the binary changed the value of another string that
6934 happened to be identical to the end of the original first string.
6936 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6937 name", it returns that address as the IP address. On some operating
6938 systems (e.g. Solaris), it also passes back the IP address string as the
6939 "host name". However, on others (e.g. Linux), it passes back an empty
6940 string. Exim wasn't checking for this, and was changing the host name to an
6941 empty string, assuming it had been canonicalized.
6943 5. Although rare, it is permitted to have more than one PTR record for a given
6944 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6945 all the names associated with an address, because they do in Solaris.
6946 However, it seems that they do not in Linux for data that comes from the
6947 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6948 I found this out when I moved to a new Linux workstation and tried to run
6949 the Exim test suite.
6951 To get round this problem I have changed the code so that it now does its
6952 own call to the DNS to look up PTR records when searching for a host name.
6953 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6954 addresses that are only in /etc/hosts are still found.
6956 This behaviour is, however, controlled by an option called host_lookup_
6957 order, which defaults to "bydns:byaddr". If people want to use the other
6958 order, or indeed, just use one or the other means of lookup, they can
6959 specify it in this variable.
6961 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6962 some operating systems, this comes back from gethostbyaddr() as an empty
6963 string, and this is what Exim used to test for. However, it seems that in
6964 other systems, "." is yielded. Exim now tests for this case too.
6966 7. The values of check_spool_space and check_log_space are now held internally
6967 as a number of kilobytes instead of an absolute number of bytes. If a
6968 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6969 kilobyte. This means that much larger values can be stored.
6971 8. Exim monitor: an attempt to get the action menu when not actually pointing
6972 at a message produces an empty menu entitled "No message selected". This
6973 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6974 no entries in it ("Shell widget menu has zero width and/or height"). So I
6975 have added a single, blank menu entry in this case.
6977 9. Added ${quote_local_part.
6979 10. MIME decoding is now applied to the contents of Subject: header lines when
6982 11. Now that a reference to $sender_host_address automatically causes a reverse
6983 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6984 host lookup before query-style lookups in lists that might use this
6985 variable. This has therefore been abolished, and the "net-" prefix is no
6986 longer necessary for query-style lookups.
6988 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6989 have been a typo for LFLAGS, so it has been changed.
6991 13. The install script calls Exim with "-C /dev/null" in order to find the
6992 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6993 to be output. However, since Exim outputs its version number before the
6994 error, it didn't break the script. It just looked ugly. I fixed this by
6995 always allowing "-C /dev/null" if the caller is root.
6997 14. Ignore overlarge ACL variable number when reading spool file - insurance
6998 against a later release with more variables having written the file.
7000 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7001 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7002 this, as well as the form without the "IPv6" on the front.
7004 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7005 OS/Makefile-Darwin file.
7007 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7008 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7010 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7011 variable. However, some OS use ints for inodes. I've added cast to long int
7012 to get rid of the compiler warning.
7014 19. I had forgotten to lock out "/../" in configuration file names when
7015 ALT_CONFIG_PREFIX was set.
7017 20. Routers used for verification do not need to specify transports. However,
7018 if such a router generated a host list, and callout was configured, Exim
7019 crashed, because it could not find a port number from the (non-existent)
7020 transport. It now assumes port 25 in this circumstance.
7022 21. Added the -t option to exigrep.
7024 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7025 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7026 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7027 them is set, LOOKUP_LSEARCH is forced.
7029 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7031 24. Added sender and host information to the "rejected by local_scan()" log
7032 line; previously there was no indication of these.
7034 25. Added .include_if_exists.
7036 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7037 Linux. It turns out that not all file systems support this. Apparently some
7038 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7039 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7040 not supported on the file descriptor, is now ignored when Exim is trying to
7041 sync a directory. This applies only to Linux.
7043 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7045 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7046 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7049 29. Added support for maildirsize files from supplied patch (modified a bit).
7051 30. The use of :fail: followed by an empty string could lead Exim to respond to
7052 sender verification failures with (e.g.):
7054 550 Verification failed for <xxx>
7055 550 Sender verify failed
7057 where the first response line was missing the '-' that indicates it is not
7058 the final line of the response.
7060 31. The loop for finding the name of the user that called Exim had a hardwired
7061 limit of 10; it now uses the value of finduser_retries, which is used for
7062 all other user lookups.
7064 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7067 33. Exim was neglecting to zero errno before one call of strtol() when
7068 expanding a string and expecting an integer value. On some systems this
7069 resulted in spurious "integer overflow" errors. Also, it was casting the
7070 result into an int without checking.
7072 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7073 did not work. The code looks as if it has *never* worked, though it appears
7074 to have been documented since at least release 1.62. I have made it work.
7076 35. The "timeout_DNS" error in retry rules, also documented since at least
7077 1.62, also never worked. As it isn't clear exactly what this means, and
7078 clearly it isn't a major issue, I have abolished the feature by treating it
7079 as "timeout", and writing a warning to the main and panic logs.
7081 36. The display of retry rules for -brt wasn't always showing the error code
7084 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7085 timeout_connect_A, timeout_connect_MX.
7087 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7088 to the empty sender.
7090 39. The daemon was not analysing the content of -oX till after it had closed
7091 stderr and disconnected from the controlling terminal. This meant that any
7092 syntax errors were only noted on the panic log, and the return code from
7093 the command was 0. By re-arranging the code a little, I've made the
7094 decoding happen first, so such errors now appear on stderr, and the return
7095 code is 1. However, the actual setting up of the sockets still happens in
7096 the disconnected process, so errors there are still only recorded on the
7099 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7100 connections (as happens on some IP stacks) was logged at start up time as
7101 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7102 it from "IPv6 and IPv4", which means that two separate sockets are being
7105 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7106 says whether AF_INET or AF_INET6 was passed as an argument.
7108 42. Exiwhat output was messed up when time zones were included in log
7111 43. Exiwhat now gives more information about the daemon's listening ports,
7112 and whether -tls-on-connect was used.
7114 44. The "port" option of the smtp transport is now expanded.
7116 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7117 silently ignored. Now an error message is written to the main and panic
7120 46. There's a new ACL modifier called "logwrite" which writes to a log file
7121 as soon as it is encountered.
7123 47. Added $local_user_uid and $local_user_gid at routing time.
7125 48. Exim crashed when trying to verify a sender address that was being
7128 49. Exim was recognizing only a space character after ".include". It now also
7129 recognizes a tab character.
7131 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7132 extracting the relevant information from the specification. The man page no
7133 longer contains scrambled data for the -d option, and I've added a section
7134 at the front about calling Exim under different names.
7136 51. Added "extra_headers" argument to the "mail" command in filter files.
7138 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7141 53. Installed eximstats 1.29.
7143 54. Added transport_filter_timeout as a generic transport option.
7145 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7146 Cc: header lines. This was required by RFC 822, but it not required by RFC
7149 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7150 incoming messages that did not have them. Now it does so only if the
7151 message originates locally, that is, if there is no associated remote host
7152 address. When Resent- header lines are present, this applies to the Resent-
7153 lines rather than the non-Resent- lines.
7155 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7156 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7158 58. Messages for configuration errors now include the name of the main
7159 configuration file - useful now that there may be more than one file in a
7160 list (.included file names were always shown).
7162 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7163 for those rare installations that do not start the daemon as root or run it
7164 setuid root. I've cut out the call to initgroups() if the daemon is not
7167 60. The Exim user and group can now be bound into the binary as text strings
7168 that are looked up at the start of Exim's processing.
7170 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7172 62. Added $mailstore_basename variable.
7174 63. Installed patch to sieve.c from Michael Haardt.
7176 64. When Exim failed to open the panic log after failing to open the main log,
7177 the original message it was trying to log was written to stderr and debug
7178 output, but if they were not available (the usual case in production), it
7179 was lost. Now it is written to syslog before the two lines that record the
7180 failures to open the logs.
7182 65. Users' Exim filters run in subprocesses under the user's uid. It is
7183 possible for a "deliver" command or an alias in a "personal" command to
7184 provoke an address rewrite. If logging of address rewriting is configured,
7185 this fails because the process is not running as root or exim. There may be
7186 a better way of dealing with this, but for the moment (because 4.30 needs
7187 to be released), I have disabled address rewrite logging when running a
7188 filter in a non-root, non-exim process.
7194 1. The buildconfig auxiliary program wasn't quoting the value set for
7195 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7196 not defined. This bug was masked in 4.22 by the effect that was fixed in
7199 2. Some messages that were rejected after a message id was allocated were
7200 shown as "incomplete" by exigrep. It no longer does this for messages that
7201 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7203 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7204 have allow_domain_literals set, the ID did not get logged in the <= line.
7205 Domain literals are now always recognized in Message-ID: header lines.
7207 4. The first argument for a ${extract expansion item is the key name or field
7208 number. Leading and trailing spaces in this item were not being ignored,
7209 causing some misleading effects.
7211 5. When deliver_drop_privilege was set, single queue runner processes started
7212 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7213 same command in the process it spins off) were not dropping privilege.
7215 6. When the daemon running as "exim" started a queue runner, it always
7216 re-executed Exim in the spun-off process. This is a waste of effort when
7217 deliver_drop_privilege is set. The new process now just calls the
7218 queue-runner function directly.
7224 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7227 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7228 ignored. Though the use of -oP was forcing the writing of a pid file, it
7229 was always written to the default place.
7231 3. If the message "no IP address found for host xxxx" is generated during
7232 incoming verification, it is now followed by identification of the incoming
7233 connection (so you can more easily find what provoked it).
7235 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7237 5. Added some features to "harden" Exim a bit more against certain attacks:
7239 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7240 be put in Local/Makefile. This is like the never_users runtime option,
7241 but it cannot be overridden. The default setting is "root".
7243 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7244 prefix string with which any file named in a -C command line option
7247 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7248 is retained for -C and -D only if the caller of Exim is root. Without
7249 it, the exim user may also use -C and -D and retain privilege.
7251 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7252 command line option is disabled.
7254 6. Macro names set by the -D option must start with an upper case letter, just
7255 like macro names defined in the configuration file.
7257 7. Added "dereference=" facility to LDAP.
7259 8. Two instances of the typo "uknown" in the source files are fixed.
7261 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7262 the Configure-Makefile script screwed up while processing it.
7264 10. Incorporated PCRE 4.4.
7266 11. The SMTP synchronization check was not operating right at the start of an
7267 SMTP session. For example, it could not catch a HELO sent before the client
7268 waited for the greeting. There is now a check for outstanding input at the
7269 point when the greeting is written. Because of the duplex, asynchronous
7270 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7271 way, but not yet received, when the check is performed.
7273 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7274 on TCP/IP sockets, because this apparently causes some broken clients to
7277 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7278 unchanged) from the Cygwin maintainer.
7280 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7281 was supported instead of testing for mbx. Effectively a typo.
7283 15. The spa authenticator server code was not checking that the input it
7284 received was valid base64.
7286 16. The debug output line for the "set" modifier in ACLs was not showing the
7287 name of the variable that was being set.
7289 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7291 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7292 lookup on its own. Something else was needed to trigger the lookup. For
7293 example, a match in host_lookup or the need for a host name in a host list.
7294 Now, if $sender_host_name is referenced and the host name has not yet been
7295 looked up, a lookup is performed. If the lookup fails, the variable remains
7296 empty, and $host_lookup_failed is set to "1".
7298 19. Added "eqi" as a case-independent comparison operator.
7300 20. The saslauthd authentication condition could segfault if neither service
7301 nor realm was specified.
7303 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7304 error message that was logged was misleading, and incoming SMTP
7305 connections were dropped. The message is now more accurate, and temporary
7306 errors are given to SMTP connections.
7308 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7309 (except RSET) with a 421 error, until QUIT is received. However, it was
7310 failing to send a response to QUIT.
7312 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7313 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7314 ACL is now run after the helo_try_verify_hosts code.
7316 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7317 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7318 case-independent, so other case variants are also recognized). Apparently
7319 some systems use these upper case variants.
7321 25. If more than two messages were waiting for the same host, and a transport
7322 filter was specified for the transport, Exim sent two messages over the
7323 same TCP/IP connection, and then failed with "socket operation on non-
7324 socket" when it tried to send the third.
7326 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7328 27. The extern definition of crypt16() in expand.c was not being excluded when
7329 the OS had its own crypt16() function.
7331 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7332 as a preferred synonym for return_size_limit, both as an option and as an
7335 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7337 30. Changed the default configuration ACL to relax the local part checking rule
7338 for addresses that are not in any local domains. For these addresses,
7339 slashes and pipe symbols are allowed within local parts, but the sequence
7340 /../ is explicitly forbidden.
7342 31. SPA server authentication was not clearing the challenge buffer before
7345 32. log_message in a "warn" ACL statement was writing to the reject log as
7346 well as to the main log, which contradicts the documentation and doesn't
7347 seem right (because no rejection is happening). So I have stopped it.
7349 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7350 However, I am unable to do any testing of this.
7352 34. Fixed an infelicity in the appendfile transport. When checking directories
7353 for a mailbox, to see if any needed to be created, it was accidentally
7354 using path names with one or more superfluous leading slashes; tracing
7355 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7357 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7358 contents are added to the log line that is written for every discarded
7359 recipient. (Previously a log_message setting was ignored.)
7361 36. The ${quote: operator now quotes the string if it is empty.
7363 37. The install script runs exim in order to find its version number. If for
7364 some reason other than non-existence or emptiness, which it checks, it
7365 could not run './exim', it was installing it with an empty version number,
7366 i.e. as "exim-". This error state is now caught, and the installation is
7369 38. An argument was missing from the function that creates an error message
7370 when Exim fails to connect to the socket for saslauthd authentication.
7371 This could cause Exim to crash, or give a corrupted message.
7373 39. Added isip, isip4, and isip6 to ${if conditions.
7375 40. The ACL variables $acl_xx are now saved with the message, and can be
7376 accessed later in routers, transports, and filters.
7378 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7379 strings in the file are not string-expanded.
7381 42. If a MAIL command specified a SIZE value that was too large to fit into an
7382 int variable, the check against message_size_limit failed. Such values are
7383 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7384 day this will have to be increased, but I don't think I want to be around
7385 when emails are that large.
7392 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7393 iconv() is not standard in FreeBSD.
7395 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7396 IPv6 enabled. The observed symptom was a segmentation fault on return from
7397 the function os_common_find_running_interfaces() in src/os.c.
7399 3. In the check_special_case() function in daemon.c I had used "errno" as an
7400 argument name, which causes warnings on some systems. This was basically a
7401 typo, since it was named "eno" in the comments!
7403 4. The code that waits for the clock to tick (at a resolution of some fraction
7404 of a second) so as to ensure message-id uniqueness was always waiting for
7405 at least one whole tick, when it could have waited for less. [This is
7406 almost certainly not relevant at current processor speeds, where it is
7407 unlikely to ever wait at all. But we try to future-proof.]
7409 5. The function that sleeps for a time interval that includes fractions of a
7410 second contained a race. It did not block SIGALRM between setting the
7411 timer, and suspending (a couple of lines later). If the interval was short
7412 and the sigsuspend() was delayed until after it had expired, the suspension
7413 never ended. On busy systems this could lead to processes getting stuck for
7416 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7417 process, before it forks any delivery processes. The open lookup caching
7418 mechanism meant that the open file or database connection was passed into
7419 the delivery process. The problem was that delivery processes always tidy
7420 up cached lookup data. This could cause a problem for the next delivery
7421 process started by the queue runner, because the external queue runner
7422 process does not know about the closure. So the next delivery process
7423 still has data in the lookup cache. In the case of a file lookup, there was
7424 no problem because closing a file descriptor in a subprocess doesn't affect
7425 the parent. However, if the lookup was caching a connection to a database,
7426 the connection was closed, and the second delivery process was likely to
7427 see errors such as "PGSQL: query failed: server closed the connection
7428 unexpectedly". The problem has been fixed by closing all cached lookups
7429 in a queue runner before running a delivery process.
7431 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7432 seem to have the "const" qualifier which it has on other OS. I've
7435 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7436 *of the same type* (client or server) with the same public name that an
7437 error should be diagnosed.
7439 9. When Exim looked up a host name for an IP address, but failed to find the
7440 original IP address when looking up the host name (a safety check), it
7441 output the message "<ip address> does not match any IP for NULL", which was
7442 confusing, to say the least. The bug was that the host name should have
7443 appeared instead of "NULL".
7445 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7446 user that is built into the binary, and the -C or -D options is used, root
7447 privilege is dropped before the configuration file is read. In addition,
7448 logging is switched to stderr instead of the normal log files. If the
7449 configuration then re-defines the Exim user, the unprivileged environment
7450 is probably not what is expected, so Exim logs a panic warning message (but
7453 However, if deliver_drop_privilege is set, the unprivileged state may well
7454 be exactly what is intended, so the warning has been cut out in that case,
7455 and Exim is allowed to try to write to its normal log files.
7461 1. smtp_return_error_details was not giving details for temporary sender
7462 or receiver verification errors.
7464 2. Diagnose a configuration error if two authenticators have the same public
7467 3. Exim used not to create the message log file for a message until the first
7468 delivery attempt. This could be confusing when incoming messages were held
7469 for policy or load reasons. The message log file is now created at the time
7470 the message is received, and an initial "Received" line is written to it.
7472 4. The automatically generated man page for command line options had a minor
7473 bug that caused no ill effects; however, a more serious problem was that
7474 the procedure for building the man page automatically didn't always
7475 operate. Consequently, release 4.20 contains an out-of-date version. This
7476 shouldn't happen again.
7478 5. When building Exim with embedded Perl support, the script that builds the
7479 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7480 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7482 6. The freeze_tell option was not being used for messages that were frozen on
7483 arrival, either by an ACL or by local_scan().
7485 7. Added the smtp_incomplete_transaction log selector.
7487 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7488 was accepting AUTH without a new EHLO.
7490 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7491 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7494 10. Logging of TCP/IP connections (when configured) now happens in the main
7495 daemon process instead of the child process, so that the TCP/IP connection
7496 count is more accurate (but it can never be perfect).
7498 11. The use of "drop" in a nested ACL was not being handled correctly in the
7499 outer ACL. Now, if condition failure induced by the nested "drop" causes
7500 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7501 or "require"), the connection is dropped.
7503 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7504 that yield "discard" can now be used with an "accept" or a "discard" verb,
7505 but an error is generated for any others (because I can't see a useful way
7506 to define what should happen).
7508 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7509 are now processed in the same way as lines in the Exim configuration file.
7510 In particular, continuation lines are supported.
7512 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7514 15. Added -ti meaning -t -i.
7516 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7517 domains, and warn by logging if others are found.
7519 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7520 returned from GIFCONF when Exim is trying to find the list of interfaces on
7521 a host. The code in os.c has been modified to copy each ifreq to an aligned
7522 structure in all cases.
7524 Also, in some cases, the returned ifreq's were being copied to a 'struct
7525 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7526 means the last couple of bytes of an IPv6 address could be chopped if the
7527 ifreq contained only a normal sockaddr (14 bytes storage).
7529 18. Named domain lists were not supported in the hosts_treat_as_local option.
7530 An entry such as +xxxx was not recognized, and was treated as a literal
7533 19. Ensure that header lines added by a DATA ACL are included in the reject log
7534 if the ACL subsequently rejects the message.
7536 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7537 MD5 (which is deprecated).
7539 21. When testing a filter file using -bf, Exim was writing a message when it
7540 took the sender from a "From " line in the message, but it was not doing so
7541 when it took $return_path from a Return-Path: header line. It now does.
7543 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7544 with a valid header line field name (a series of printing characters
7545 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7547 23. Changed "disc" in the source to "disk" to conform to the documentation and
7548 the book and for uniformity.
7550 24. Ignore Sendmail's -Ooption=value command line item.
7552 25. When execve() failed while trying to run a command in a pipe transport,
7553 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7554 could be confused with a return value of 69 from the command itself. This
7555 has been changed to 127, the value the shell returns if it is asked to run
7556 a non-existent command. The wording for the related log line suggests a
7557 non-existent command as the problem.
7559 26. If received_header_text expands to an empty string, do not add a Received:
7560 header line to the message. (Well, it adds a token one on the spool, but
7561 marks it "old" so that it doesn't get used or transmitted.)
7563 27. Installed eximstats 1.28 (addition of -nt option).
7565 28. There was no check for failure on the call to getsockname() in the daemon
7566 code. This can fail if there is a shortage of resources on the system, with
7567 ENOMEM, for example. A temporary error is now given on failure.
7569 29. Contrary to the C standard, it seems that in some environments, the
7570 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7571 program. Exim now does this explicitly; it affects the formatting of
7572 timestamps using strftime().
7574 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7575 complaints. I've now initialized all the variables, to avoid this.
7577 32. Header lines added by a system filter were not being "seen" during
7578 transport-time rewrites.
7580 33. The info_callback() function passed to OpenSSL is set up with type void
7581 (*)(SSL *, int, int), as described somewhere. However, when calling the
7582 function (actually a macro) that sets it up, the type void(*)() is
7583 expected. I've put in a cast to prevent warnings from picky compilers.
7585 34. If a DNS black list lookup found a CNAME record, but there were no A
7586 records associated with the domain it pointed at, Exim crashed.
7588 35. If a DNS black list lookup returned more than one A record, Exim ignored
7589 all but the first. It now scans all returned addresses if a particular IP
7590 value is being sought. In this situation, the contents of the
7591 $dnslist_value variable are a list of all the addresses, separated by a
7594 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7595 to accept a host name and all its aliases if the forward lookup for any of
7596 them yielded the IP address of the incoming connection. Now it accepts only
7597 those names whose forward lookup yields the correct IP address. Any other
7598 names are discarded. This closes a loophole whereby a rogue DNS
7599 administrator could create reverse DNS records to break through a
7600 wildcarded host restriction in an ACL.
7602 37. If a user filter or a system filter that ran in a subprocess used any of
7603 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7604 the wrong values were passed to the pipe command ($thisaddress had the
7605 value of $0, $0 had the value of $1, etc). This bug was introduced by
7606 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7608 38. Improved the line breaking for long SMTP error messages from ACLs.
7609 Previously, if there was no break point between 40 and 75 characters, Exim
7610 left the rest of the message alone. Two changes have been made: (a) I've
7611 reduced the minimum length to 35 characters; (b) if it can't find a break
7612 point between 35 and 75 characters, it looks ahead and uses the first one
7613 that it finds. This may give the occasional overlong line, but at least the
7614 remaining text gets split now.
7616 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7617 file descriptors might be low, and that setting 1000 would always raise it.
7618 It turns out that in some environments, the limit is already over 1000 and
7619 that lowering it causes trouble. So now Exim takes care not to decrease it.
7621 40. When delivering a message, the value of $return_path is set to $sender_
7622 address at the start of routing (routers may change the value). By an
7623 oversight, this default was not being set up when an address was tested by
7624 -bt or -bv, which affected the outcome if any router or filter referred to
7627 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7628 log only when "message" or "log_message" are set. However, if one of the
7629 conditions was an address verification, or a call to a nested ACL, the
7630 messages generated by the underlying test were being passed through. This
7631 no longer happens. The underlying message is available in $acl_verify_
7632 message for both "message" and "log_message" expansions, so it can be
7633 passed through if needed.
7635 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7636 new expansion $bh_ to give the encoded byte string without charset
7637 translation. Translation happens only if iconv() is available; HAVE_ICONV
7638 indicates this at build time. HEADERS_CHARSET gives the charset to
7639 translate to; headers_charset can change it in the configuration, and
7640 "headers charset" can change it in an individual filter file.
7642 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7643 that creates RFC 2047 encoded "words" labels them as that charset instead
7644 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7645 expansion operator; (ii) when Exim creates a From: line for a local
7646 message; (iii) when a header line is rewritten to include a "phrase" part.
7648 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7649 buggy, causing it to skip the first lines of messages whose message ID
7650 ended in 'D'. This would not have bitten before Exim release 4.14, because
7651 message IDs were unlikely to end in 'D' before then. The effect was to have
7652 incorrect size information for certain domains.
7654 45. #include "config.h" was missing at the start of the crypt16.c module. This
7655 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7658 46. If there was a timeout during a "random" callout check, Exim treated it as
7659 a failure of the random address, and carried on sending RSET and the real
7660 address. If the delay was just some slowness somewhere, the response to the
7661 original RCPT would be taken as a response to RSET and so on, causing
7662 mayhem of various kinds.
7664 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7665 when I implemented it. It didn't allow for the fact that some option values
7666 may legitimately be negative (e.g. size_addition), and it didn't even do
7667 the right test for positive values.
7669 48. Domain names in DNS records are case-independent. Exim always looks them up
7670 in lower case. Some resolvers return domain names in exactly the case they
7671 appear in the zone file, that is, they may contain uppercase letters. Not
7672 all resolvers do this - some return always lower case. Exim was treating a
7673 change of case by a resolver as a change of domain, similar to a widening
7674 of a domain abbreviation. This triggered its re-routing code and so it was
7675 trying to route what was effectively the same domain again. This normally
7676 caused routing to fail (because the router wouldn't handle the domain
7677 twice). Now Exim checks for this case specially, and just changes the
7678 casing of the domain that it ultimately uses when it transmits the message
7681 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7684 50. If a filter generated a file delivery with a non-absolute name (possible if
7685 no home directory exists for the router), the forbid_file option was not
7688 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7689 the existing equality matching.
7691 52. Exim was using ints instead of ino_t variables in some places where it was
7692 dealing with inode numbers.
7694 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7695 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7696 called TMPDIR, and if it finds it is different, it changes its value.
7698 54. The smtp_printf() function is now made available to local_scan() so
7699 additional output lines can be written before returning. There is also an
7700 smtp_fflush() function to enable the detection of a dropped connection.
7701 The variables smtp_input and smtp_batched_input are exported to
7704 55. Changed the default runtime configuration: the message "Unknown user"
7705 has been removed from the ACL, and instead placed on the localuser router,
7706 using the cannot_route_message feature. This means that any verification
7707 failures that generate their own messages won't get overridden. Similarly,
7708 the "Unrouteable address" message that was in the ACL for unverifiable
7709 relay addresses has also been removed.
7711 56. Added hosts_avoid_esmtp to the smtp transport.
7713 57. The exicyclog script was not checking for the esoteric option
7714 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7715 will work only if exicyclog is run under the appropriate euid.
7717 58. Following a discussion on the list, the rules by which Exim recognises line
7718 endings on incoming messages have been changed. The -dropcr and drop_cr
7719 options are now no-ops, retained only for backwards compatibility. The
7720 following line terminators are recognized: LF CRLF CR. However, special
7721 processing applies to CR:
7723 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7724 nor a local message in the state where . is a terminator.
7726 (ii) If a bare CR is encountered in a header line, an extra space is added
7727 after the line terminator so as not to end the header. The reasoning
7728 behind this is that bare CRs in header lines are most likely either
7729 to be mistakes, or people trying to play silly games.
7731 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7732 was being incorrectly given as 18 bytes larger than it should have been.
7733 This is a VOB (very old bug).
7735 60. This may never have affected anything current, but just in case it has:
7736 When the local host is found other than at the start of a list of hosts,
7737 the local host, those with the same MX, and any that follow, are discarded.
7738 When the list in question was part of a longer list of hosts, the following
7739 hosts (not currently being processed) were also being discarded. This no
7740 longer happens. I'm not sure if this situation could ever has previously
7743 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7746 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7747 header. This is something that is recommended in a new Internet Draft, and
7748 is something that is documented as being done by Sendmail. There are two
7749 possible values. For messages generated by the autoreply transport, Exim
7752 Auto-Submitted: auto-replied
7754 whereas for all other generated messages (e.g. bounces) it adds
7756 Auto-Submitted: auto-generated
7758 63. The "personal" condition in filters now includes a test for the
7759 Auto-Submitted: header. If it contains the string "auto-" the message it
7760 not considered personal.
7762 64. Added rcpt_include_affixes as a generic transport option.
7764 65. Added queue_only_override (default true).
7766 66. Added the syslog_duplication option.
7768 67. If what should have been the first header line of a message consisted of
7769 a space followed by a colon, Exim was mis-interpreting it as a header line.
7770 It isn't of course - it is syntactically invalid and should therefore be
7771 treated as the start of the message body. The misbehaviour could have
7772 caused a number of strange effects, including loss of data in subsequent
7773 header lines, and spool format errors.
7775 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7776 client host had authenticated. This control can now be exercised by an ACL
7777 for more flexibility.
7779 69. By default, callouts do not happen when testing with -bh. There is now a
7780 variant, -bhc, which does actually run the callout code, including
7781 consulting and updating the callout cache.
7783 70. Added support for saslauthd authentication, courtesy of Alexander
7786 71. If statvfs() failed on the spool or log directories while checking their
7787 size for availability, Exim confusingly gave the error "space shortage".
7788 Furthermore, in debugging mode it crashed with a floating point exception.
7789 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7790 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7791 serious problem, Exim now writes to the main and panic logs when this
7792 happens, with details of the failure. It then refuses to accept the
7793 incoming message, giving the message "spool directory problem" or "log
7794 directory problem" with a 421 code for SMTP messages.
7796 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7797 0, 1, and 2 exist, because some OS complain for execs without them (see
7798 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7799 descriptors. However, the code omitted to check that the open succeeded,
7800 causing mysterious errors if for some reason the permissions on /dev/null
7801 got screwed. Now Exim writes a message to the main and panic logs, and
7802 bombs out if it can't open /dev/null.
7804 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7805 interact so that it is all more flexible. It is supposed to remain
7806 backwards compatible. Also added extra_local_interfaces.
7808 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7809 to bomb out with an assertion failure - to the client this appears as a
7810 connection drop. This problem occurs in the part of the code that was taken
7811 from the Samba project. Fortunately, the assertion is in a very simple
7812 function, so I have fixed this by reproducing the function inline in the
7813 one place where it is called, and arranging for authentication to fail
7814 instead of killing the process with assert().
7816 75. The SPA client code was not working when the server requested OEM rather
7817 than Unicode encoding.
7819 76. Added code to make require_files with a specific uid setting more usable in
7820 the case where statting the file as root fails - usually a non-root-mounted
7821 NFS file system. When this happens and the failure is EACCES, Exim now
7822 forks a subprocess and does the per-uid checking as the relevant uid.
7824 77. Added process_log_path.
7826 78. If log_file_path was not explicitly set, a setting of check_log_space or
7827 check_log_inodes was ignored.
7829 79. If a space check for the spool or log partitions fails, the incident is now
7830 logged. Of course, in the latter case the data may get lost...
7832 80. Added the %p formatting code to string_format() so that it can be used to
7833 print addresses in debug_print(). Adjusted all the address printing in the
7834 debugging in store.c to use %p rather than %d.
7836 81. There was a concern that a line of code in smtp_in.c could overflow a
7837 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7838 initially expressed, the concern was not well-founded, because trailing
7839 spaces are removed early. However, if the trailing spaces were followed by
7840 a NULL, they did not get removed, so the overflow was possible. Two fixes
7843 (a) I re-wrote the offending code in a cleaner fashion.
7844 (b) If an incoming SMTP command contains a NULL character, it is rejected
7847 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7848 runs initgroups(), so that if the Exim user is in any additional groups,
7849 they will be used during message reception.
7855 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob