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
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,
26 JH/01 Avoid costly startup code when not strictly needed. This reduces time
27 for some exim process initialisations. It does mean that the logging
28 of TLS configuration problems is only done for the daemon startup.
30 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
32 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
33 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
36 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
37 DKIM signing is being done. Previously a transport_filter would always
38 disable CHUNKING, falling back to traditional DATA.
40 JH/05 Regard command-line receipients as tainted.
42 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
44 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
45 PAM library frees one of the arguments given to it, despite the
46 documentation. Therefore a plain malloc must be used.
48 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
49 on-stack buffers were used, resulting in a taint trap when DSN information
50 copied from a received message was written into the buffer.
52 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
53 the ordering of its ARC headers. This caused a crash.
55 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
56 a new record was being constructed with information from the peer, a trap
59 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
60 installation would get error messages from DMARC verify, when it hit the
61 nonexistent file indicated by the default. Distros wanting DMARC enabled
62 should both provide the file and set the option.
63 Also enforce no DMARC verification for command-line sourced messages.
65 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
66 could, depending on the platform, hang at the STARTTLS response.
68 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
69 message on a connection. Previously if one message had ARC headers and
70 the following one did not, a crash could result when adding an
71 Authentication-Results: header.
73 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
74 Exim main code and Exim-related utities. The introduction of taint
75 tracking also did many adjustments to string handling. Since then, eximon
76 frequently terminated with an assert failure.
78 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
79 check for 452 responses. This slightly helps the inefficieny of doing
80 a large alias-expansion into a recipient-limited target. The max_rcpt
81 transport option still applies (and at the current default, will override
82 the new feature). The check is done for either cause of synch, and forces
83 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
84 connection. The new facility is not tunable at this time.
86 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
87 library live data was being used, so the results became garbage. Make
88 copies while it is still usable.
90 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
91 on delivery deferred (==) and failed (**) lines (if a delivery was
92 attemtped). Previously it was only on completion (=>) lines.
94 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
95 for the expansion of the server_scram_iter and server_scram_salt options.
97 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
98 are now specifically given a NO_DATA response without hitting the system
99 resolver. The library goes on to do the now-standard TXT lookup.
100 Use of dnsdb lookups is not affected.
102 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
103 only retrieve the errormessage once. Previously two calls to dlerror()
104 were used, and the second one (for mainlog/paniclog) retrieved null
107 JH/20 Taint checking: disallow use of tainted data for
108 - the appendfile transport file and directory options
109 - the pipe transport command
110 - the autoreply transport file, log and once options
111 - file names used by the redirect router (including filter files)
113 - paths used by single-key lookups
114 Previously this was permitted.
116 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
117 adjusted the size of a major service buffer; this failed because the
118 buffer was in use at the time. Change to a compile-time increase in the
119 buffer size, when this authenticator is compiled into exim.
121 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
122 previous fast-mode was untenable in the face of glibs using mmap to
123 support larger malloc requests.
125 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
126 New values supported, if defined on system where compiled:
127 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
128 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
130 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
131 running a limited number of proceses in parallel, a benefit is gained. The
132 amount varies with the platform hardware and load. The use of the option
133 queue_run_in_order means we cannot do this, as ordering becomes
136 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
137 had introduced a string-copy (for ensuring NUL-termination) which was not
138 appropriate for that case, which can include embedded NUL bytes in the
139 block of data. Investigation showed the copy to actually be needless, the
140 data being length-specified.
142 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
143 done during a receiving connection, and both used TLS, global info was
144 used rather than per-connection info for tracking the state of data
145 queued for transmission. This could result in a connection hang.
147 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
148 Previously, when delivering serveral messages down a single connection
149 only the first would provide a SIZE. This was due to the size information
150 not being properly tracked.
152 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
153 TAI (at 37 seconds currently), pretend to be in UTC for time-related
154 expansion and logging. Previously, spurious values such as a future
155 minute could be seen.
157 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
158 it could crash from a null-deref. This could also affect the
159 ${addresses: } operator and ${readsock } item.
161 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
162 message following a mime one, the variable was not reset.
164 JH/30 When an pipelined-connect fails at the first response, assume incorrect
165 cached capability (perhaps the peer reneged?) and immediately retry in
168 JH/31 Fix spurious detection of timeout while writing to transport filter.
170 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
171 an attempt to copy the string was made before checking it.
173 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
174 taint of the lookup key was maintained; we now regard the presence in the
175 filesystem as sufficient validation.
177 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
178 argument is supplied.
180 JH/35 The dsearch lookup now requires that the directory is an absolute path.
181 Previously this was not checked, and nonempty relative paths made an
182 access under Exim's current working directory.
184 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
185 Previously no event was raised.
187 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
188 parameter supplied by the sender MAIL FROM command. Previously it was
189 ignored, and only the check_spool_space option value for the required
192 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
193 the size of the signing public-key. Previously it was instead giving
194 the size of the signature hash.
196 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
197 the default. See the (new) dkim_verify_min_keysizes option.
199 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
200 and an ACL use a lookup for checking either the local_part or domain,
201 stale data could be accessed. Ensure that variable references are
202 dropped between messages.
204 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
205 by the client was not checked as pointing within response data before
206 being used. A malicious client could thus cause an out-of-bounds read and
207 possibly gain authentication. Fix by adding the check.
209 JH/42 Internationalisation: change the default for downconversion in the smtp
210 transport to be "if needed". Previously it was "as previously set" for
211 the message, which usually meant "if needed" for message-submission but
212 "no" for everything else. However, MTAs have been seen using SMTPUTF8
213 even when the envelope addresses did not need it, resulting in forwarding
214 failures to non-supporting MTAs. A downconvert in such cases will be
215 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
216 transport. The change does mean that addresses needing conversion will
217 be converted when previously a delivery failure would occur.
219 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
220 response was received it would be used unchecked in a fail-DSN, violating
221 standards on line-length limits. Truncate if needed.
223 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
224 doesn't work. (Additionally add a new main config option to configure the
231 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
232 side, to decode a TLS 1.3 packet capture.
234 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
235 Previously the default library behaviour applied, sending two, each in
238 JH/03 Debug output for ACL now gives the config file name and line number for
241 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
243 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
245 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
246 buffer overrun for (non-chunking) other transports.
248 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
249 TLS1.3, means that a server rejecting a client certificate is not visible
250 to the client until the first read of encrypted data (typically the
251 response to EHLO). Add detection for that case and treat it as a failed
252 TLS connection attempt, so that the normal retry-in-clear can work (if
253 suitably configured).
255 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
256 and/or domain. Found and fixed by Jason Betts.
258 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
259 configuration). If a CNAME target was not a wellformed name pattern, a
262 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
263 the OS reports them interleaved with other addresses.
265 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
266 used both for input and for a verify callout, both encrypted, SMTP
267 responses being sent by the server could be lost. This resulted in
268 dropped connections and sometimes bounces generated by a peer sending
271 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
272 string. Previously it was possible to cause undefined behaviour in a
273 library routine (usually a crash). Found by "zerons".
275 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
278 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
279 API was removed, so update to use the newer ones.
281 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
282 any timeout set, is taking a long time. Previously we would hang on to a
283 rotated logfile "forever" if the input was arriving with long gaps
284 (a previous attempt to fix addressed lack, for a long time, of initial
287 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
288 shared (NFS) environment. The length of the tempfile name is now
289 4 + 16 ("hdr.$message_exim_id") which might break on file
290 systems which restrict the file name length to lower values.
293 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
294 shared (NFS) environment.
296 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
297 did for all versions <4.90). Notably -M, -m, --invert, -I may be
300 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
301 on some platforms for bit 31.
303 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
304 to changes apparently associated with TLS1.3 handling some of the APIs
305 previously used were either nonfunctional or inappropriate. Strings
306 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
307 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
308 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
309 This affects log line X= elements, the $tls_{in,out}_cipher variables,
310 and the use of specific cipher names in the encrypted= ACL condition.
312 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
314 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
315 verification result was not updated unless hosts_require_ocsp applied.
317 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
318 queue_list_requires_admin set to false, non-admin users were denied the
321 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
322 directory-of-certs mode. Previously they were advertised despite the
325 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
326 A single TCP connection by a client will now hold a TLS connection open
327 for multiple message deliveries, by default. Previoud the default was to
330 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
331 default. If built with the facility, DANE will be used. The facility
332 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
334 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
335 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
336 must be defined and you must still, unless you define DISABLE_TLS, manage
337 the the include-dir and library-file requirements that go with that
338 choice. Non-TLS builds are still supported.
340 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
343 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
344 default. If the platform supports and has the facility enabled, it will
345 be requested on all coneections.
347 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
348 controlled by the build-time option SUPPORT_PIPE_CONNECT.
350 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
352 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
353 success-DSN messages. Previously the From: header was always the default
354 one for these; the option was ignored.
356 JH/28 Fix the timeout on smtp response to apply to the whole response.
357 Previously it was reset for every read, so a teergrubing peer sending
358 single bytes within the time limit could extend the connection for a
359 long time. Credit to Qualsys Security Advisory Team for the discovery.
361 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
362 delivery address, which leaked information of the results of local
363 forwarding. Change to the original envelope recipient address, per
366 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
367 requested. Previously not bounce was generated and a log entry of
368 error ignored was made.
370 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
372 JH/32 Introduce a general tainting mechanism for values read from the input
373 channel, and values derived from them. Refuse to expand any tainted
374 values, to catch one form of exploit.
376 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
377 was unused and the unexpanded text used for the test. Found and
378 fixed by Ruben Jenster.
380 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
381 an attempt to use a TLS library read routine dereffed a nul pointer,
384 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
385 them in our smtp response.
387 JH/36 Have the general router option retry_use_local_part default to true when
388 any of the restrictive preconditions are set (to anything). Previously it
389 was only for check_local user. The change removes one item of manual
390 configuration which is required for proper retries when a remote router
391 handles a subset of addresses for a domain.
393 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
394 link count into consideration.
396 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
397 caused the extension of big_buffer, the following lines were ignored.
399 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
400 accordance with RFC 2308. Previously there was no expiry, so a longlived
401 receive process (eg. due to ACL delays) versus a short SOA value could
404 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
406 JH/39 Promote DMARC support to mainline.
408 JH/40 Bug 2452: Add a References: header to DSNs.
410 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
411 parameters. The relevant library call is documented as "Deprecated: This
412 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
413 3.6.0, DH parameters are negotiated following RFC7919."
415 HS/06 Change the default of dnssec_request_domains to "*"
417 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
418 carried on and emitted a BDAT command, even when PIPELINING was not
421 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
422 buffer was used for the filename, resulting in a trap when tainted
423 arguments (eg. $domain) were used.
425 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
426 recommended to avoid a possible server-load attack. The feature can be
427 re-enabled via the openssl_options main cofiguration option.
429 JH/45 local_scan API: documented the current smtp_printf() call. This changed
430 for version 4.90 - adding a "more data" boolean to the arguments.
431 Bumped the ABI version number also, this having been missed previously;
432 release versions 4.90 to 4.92.3 inclusive were effectively broken in
433 respect of usage of smtp_printf() by either local_scan code or libraries
434 accessed via the ${dlfunc } expansion item. Both will need coding
435 adjustment for any calls to smtp_printf() to match the new function
436 signature; a FALSE value for the new argument is always safe.
438 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
439 the file-offset (which the Linux syscall does, and exim expects); this
440 resulted in an indefinite loop.
442 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
443 to do ARC verification. The Authentication-Results: header line added
444 by the configuration then had no ARC item.
450 JH/01 Remove code calling the customisable local_scan function, unless a new
451 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
453 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
454 non-signal-safe functions being used.
456 JH/03 Bug 2269: When presented with a received message having a stupidly large
457 number of DKIM-Signature headers, disable DKIM verification to avoid
458 a resource-consumption attack. The limit is set at twenty.
460 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
461 report of oldest_pass in ${authres } in consequence, and separate out
462 some descriptions of reasons for verification fail.
464 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
465 files in the spool were present and unlocked. A queue-runner could spot
466 them, resulting in a duplicate delivery. Fix that by doing the unlock
467 after the unlink. Investigation by Tim Stewart. Take the opportunity to
468 add more error-checking on spoolfile handling while that code is being
471 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
472 No known attacks, no CVE, this is defensive hardening.
474 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
475 a queue-runner could start a delivery while other operations were ongoing.
476 Cutthrough delivery was a common victim, resulting in duplicate delivery.
477 Found and investigated by Tim Stewart. Fix by using the open message data
478 file handle rather than opening another, and not locally closing it (which
479 releases a lock) for that case, while creating the temporary .eml format
480 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
482 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
483 $sender_verify_failure/$recipient_verify_failure to "random".
485 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
488 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
489 Previously this would segfault.
491 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
494 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
495 like zero, since the resolver should be doing this for us, But we need one
496 as a CNAME but no MX presence gets the CNAME returned; we need to check
497 that doesn't point to an MX to declare it "no MX returned" rather than
498 "error, loop". A new main option is added so the older capability of
499 following some limited number of chain links is maintained.
501 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
503 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
504 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
505 now-deprecated earlier definitions used only specified the range up to TLS
506 1.2 (in the older-version library docs).
508 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
510 JH/15 Rework TLS client-side context management. Stop using a global, and
511 explicitly pass a context around. This enables future use of TLS for
512 connections to service-daemons (eg. malware scanning) while a client smtp
513 connection is using TLS; with cutthrough connections this is quite likely.
515 JH/16 Fix ARC verification to do AS checks in reverse order.
517 JH/17 Support a "tls" option on the ${readsocket } expansion item.
519 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
520 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
521 Previously the "utf8" would be re-prepended for every additional message.
523 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
524 Previously thery were accepted, resulting in issues when attempting to
525 forward messages to a non-supporting MTA.
527 PP/02 Let -n work with printing macros too, not just options.
529 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
530 one parent address was copied, and bogus data was used at delivery-logging
531 time. Either a crash (after delivery) or bogus log data could result.
532 Discovery and analysis by Tim Stewart.
534 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
535 Previously if the string ended mid-character, we did not insert the
536 promised '?' replacement.
538 PP/04 Documentation: current string operators work on bytes, not codepoints.
540 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
541 should pack well giving a smaller memory footprint so better caching and
542 therefore performance. Group the declarations where this can't be done so
543 that the byte-sized flag variables are not interspersed among pointer
544 variables, giving a better chance of good packing by the compiler.
546 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
547 non-null, to avoid issues with sites running BATV. Previously reports were
548 sent with an empty envelope sender so looked like bounces.
550 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
551 The ignore_error flag wasn't being returned from the filter subprocess so
552 was not set for later routers. Investigation and fix by Matthias Kurz.
554 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
555 and a msg:complete for the whole, when a message is manually removed using
556 -Mrm. Developement by Matthias Kurz, hacked on by JH.
558 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
559 a "Gnu special" function, asprintf() in the DB utility binary builds; I
560 hope that is portable enough.
562 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
563 requiring a known-CA anchor certificate; make it now rely entirely on the
564 TLSA as an anchor. Checking the name on the leaf cert against the name
565 on the A-record for the host is still done for TA (but not for EE mode).
567 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
568 included in delivery lines for non-proxied connections, when compiled with
569 SUPPORT_SOCKS and running with proxy logging enabled.
571 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
572 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
573 move the existing event to fire before the normal logging of message
574 failure so that custom logging is bracketed by normal logging.
576 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
577 msg:fail:internal event. Developement by Matthias Kurz.
579 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
580 far too small for todays use of crypto signatures stored there. Go all
581 the way to the max DNS message size of 64kB, even though this might be
582 overmuch for IOT constrained device use.
584 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
585 copy a string over itself. The library routine is documented as not
586 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
588 JH/32 For main options check_spool_space and check_inode_space, where the
589 platform supports 64b integers, support more than the previous 2^31 kB
590 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
591 the previous G, M, k.
593 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
594 $authenticated_fail_id variable on authentication failure. Previously
597 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
598 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
599 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
600 GNUTLS_SEC_PARAM_MEDIUM.
602 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
603 side. Previously we would continue as if no SNI had been received.
605 JH/36 Harden the handling of string-lists. When a list consisted of a sole
606 "<" character, which should be a list-separator specification, we walked
607 off past the nul-terimation.
609 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
610 causes) even when the retry time is not yet met. Previously they were
611 not, meaning that when (say) an account was over-quota and temp-rejecting,
612 and multiple senders' messages were queued, only one sender would get
613 notified on each configured delay_warning cycle.
615 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
617 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
618 cipher-suites, an error can be left on the stack even for a succeeding
619 accept; this results in impossible error messages when a later operation
622 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
623 return error codes indicating retry. Under TLS1.3 this becomes required.
625 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
626 it only wrote the new authenticators, resulting in a lack of tracking of
627 peer changes of ESMTP extensions until the next cache flush.
629 JH/41 Fix the loop reading a message header line to check for integer overflow,
630 and more-often against header_maxsize. Previously a crafted message could
631 induce a crash of the recive process; now the message is cleanly rejected.
633 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
634 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
640 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
641 When redis_servers is set to a list of > 1 element, and the Redis servers
642 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
643 case of MOVED into a DEFER case instead, thus moving the query onto the
644 next server in the list. For a cluster of N elements, all N servers must
645 be defined in redis_servers.
647 GF/02 Catch and remove uninitialized value warning in exiqsumm
648 Check for existence of @ARGV before looking at $ARGV[0]
650 JH/01 Replace the store_release() internal interface with store_newblock(),
651 which internalises the check required to safely use the old one, plus
652 the allocate and data copy operations duplicated in both (!) of the
653 extant use locations.
655 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
656 modifier. This matches the restriction on the commandline.
658 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
659 Previously only the last row was returned.
661 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
662 we assumed that tags in the header were well-formed, and parsed the
663 element content after inspecting only the first char of the tag.
664 Assumptions at that stage could crash the receive process on malformed
667 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
668 While running the DKIM ACL we operate on the Permanent memory pool so that
669 variables created with "set" persist to the DATA ACL. Also (at any time)
670 DNS lookups that fail create cache records using the Permanent pool. But
671 expansions release any allocations made on the current pool - so a dnsdb
672 lookup expansion done in the DKIM ACL releases the memory used for the
673 DNS negative-cache, and bad things result. Solution is to switch to the
674 Main pool for expansions.
675 While we're in that code, add checks on the DNS cache during store_reset,
676 active in the testsuite.
677 Problem spotted, and debugging aided, by Wolfgang Breyha.
679 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
680 When none of the hosts presented to a transport match an already-open
681 connection, close it and proceed with the list. Previously we would
682 queue the message. Spotted by Lena with Yahoo, probably involving
685 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
686 Previously a spurious "250 OK id=" response was appended to the proper
689 JH/08 The "support for" informational output now, which built with Content
690 Scanning support, has a line for the malware scanner interfaces compiled
691 in. Interface can be individually included or not at build time.
693 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
694 by the template makefile "src/EDITME". The "STREAM" support for an older
695 ClamAV interface method is removed.
697 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
698 rows affected is given instead).
700 JH/11 The runtime Berkeley DB library version is now additionally output by
701 "exim -d -bV". Previously only the compile-time version was shown.
703 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
704 SMTP connection. Previously, when one had more receipients than the
705 first, an abortive onward connection was made. Move to full support for
706 multiple onward connections in sequence, handling cutthrough connection
707 for all multi-message initiating connections.
709 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
710 routers. Previously, a multi-recipient message would fail to match the
711 onward-connection opened for the first recipient, and cause its closure.
713 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
714 a timeout on read on a GnuTLS initiating connection, resulting in the
715 initiating connection being dropped. This mattered most when the callout
716 was marked defer_ok. Fix to keep the two timeout-detection methods
719 JH/15 Relax results from ACL control request to enable cutthrough, in
720 unsupported situations, from error to silently (except under debug)
721 ignoring. This covers use with PRDR, frozen messages, queue-only and
724 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
726 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
727 metadata, resulting in a crash in free().
729 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
730 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
731 Broken also in d185889f4, with init system revamp.
733 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
734 Previously we abruptly closed the connection after reading a malware-
735 found indication; now we go on to read the "scan ok" response line,
738 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
739 ACL. Previously, a crash would result.
741 JH/19 Speed up macro lookups during configuration file read, by skipping non-
742 macro text after a replacement (previously it was only once per line) and
743 by skipping builtin macros when searching for an uppercase lead character.
745 JH/20 DANE support moved from Experimental to mainline. The Makefile control
746 for the build is renamed.
748 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
749 was allocated for every new TLS startup, meaning one per message. Fix
750 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
752 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
753 reported the original. Fix to report (as far as possible) the ACL
754 result replacing the original.
756 JH/23 Fix memory leak during multi-message connections using STARTTLS under
757 OpenSSL. Certificate information is loaded for every new TLS startup,
758 and the resources needed to be freed.
760 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
762 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
765 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
766 DATA response info to the (existing) per-recipient response info for
767 the "C=" log element. It can have useful tracking info from the
768 destination system. Patch from Simon Arlott.
770 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
771 length value. Previously this would segfault.
773 HS/02 Support Avast multiline protoocol, this allows passing flags to
774 newer versions of the scanner.
776 JH/28 Ensure that variables possibly set during message acceptance are marked
777 dead before release of memory in the daemon loop. This stops complaints
778 about them when the debug_store option is enabled. Discovered specifically
779 for sender_rate_period, but applies to a whole set of variables.
780 Do the same for the queue-runner and queue-list loops, for variables set
781 from spool message files. Do the same for the SMTP per-message loop, for
782 certain variables indirectly set in ACL operations.
784 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
785 as a multi-recipient message from a mailinglist manager). The coding had
786 an arbitrary cutoff number of characters while checking for more input;
787 enforced by writing a NUL into the buffer. This corrupted long / fast
788 input. The problem was exposed more widely when more pipelineing of SMTP
789 responses was introduced, and one Exim system was feeding another.
790 The symptom is log complaints of SMTP syntax error (NUL chars) on the
791 receiving system, and refused recipients seen by the sending system
792 (propating to people being dropped from mailing lists).
793 Discovered and pinpointed by David Carter.
795 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
796 replaced by the ${authresults } expansion.
798 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
800 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
801 allows proper process termination in container environments.
803 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
804 Previously the "final dot" had a newline after it; ensure it is CR,LF.
806 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
807 and "err_perm", deprecated since 4.83 when the RFC-defined words
808 "temperror" and "permerror" were introduced.
810 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
811 transport-filters or DKIM-signing. The restriction was lost in the
812 consolidation of verify-callout and delivery SMTP handling.
813 Extend the restriction to also cover ARC-signing.
815 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
816 in defer=pass mode supply a 450 to the initiator. Previously the message
819 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
820 tls_require_ciphers is used as before.
822 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
823 "pass_unscanned". Only tmpfails from the scanner are written to
824 the paniclog, as they may require admin intervention (permission
825 denied, license issues). Other scanner errors (like decompression
826 bombs) do not cause a paniclog entry.
828 JH/36 Fix reinitialisation of DKIM logging variable between messages.
829 Previously it was possible to log spurious information in receive log
832 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
833 triggered odd behaviour from Outlook Express clients.
835 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
838 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
839 since the IETF WG has not yet settled on that versus the original
840 "bare" representation.
842 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
843 Previously the millisecond value corrupted the output.
844 Fix also for syslog_pid=no and log_selector +pid, for which the pid
845 corrupted the output.
851 JH/01 Rework error string handling in TLS interface so that the caller in
852 more cases is responsible for logging. This permits library-sourced
853 string to be attached to addresses during delivery, and collapses
854 pairs of long lines into single ones.
856 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
857 during configuration. Wildcards are allowed and expanded.
859 JH/02 Rework error string handling in DKIM to pass more info back to callers.
860 This permits better logging.
862 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
863 do not close it down and have the child transport start it up again on
864 the passed-on TCP connection. Instead, proxy the child (and any
865 subsequent ones) for TLS via a unix-domain socket channel. Logging is
866 affected: the continued delivery log lines do not have any DNSSEC, TLS
867 Certificate or OCSP information. TLS cipher information is still logged.
869 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
870 identical IP addresses on different listening ports. Will also affect
873 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
874 add noisy ifdef guards to special-case this sillyness.
875 Patch from Bernd Kuhls.
877 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
878 than 255 are no longer allowed.
880 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
881 Disable the session-cache too, which might reduce our load. Since we
882 currrectly use a new context for every connection, both as server and
883 client, there is no benefit for these.
884 GnuTLS appears to not support tickets server-side by default (we don't
885 call gnutls_session_ticket_enable_server()) but client side is enabled
886 by default on recent versions (3.1.3 +) unless the PFS priority string
889 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
890 <https://reproducible-builds.org/specs/source-date-epoch/>.
892 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
893 the check for any unsuccessful recipients did not notice the limit, and
894 erroneously found still-pending ones.
896 JH/08 Pipeline CHUNKING command and data together, on kernels that support
897 MSG_MORE. Only in-clear (not on TLS connections).
899 JH/09 Avoid using a temporary file during transport using dkim. Unless a
900 transport-filter is involved we can buffer the headers in memory for
901 creating the signature, and read the spool data file once for the
902 signature and again for transmission.
904 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
905 4.77 as the kernel support then wasn't solid, having issues in 64bit
906 mode. Now, it's been long enough. Add support for FreeBSD also.
908 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
909 case where the routing stage had gathered several addresses to send to
910 a host before calling the transport for the first, we previously failed
911 to close down TLS in the old transport process before passing the TCP
912 connection to the new process. The new one sent a STARTTLS command
913 which naturally failed, giving a failed delivery and bloating the retry
914 database. Investigation and fix prototype from Wolfgang Breyha.
916 JH/12 Fix check on SMTP command input synchronisation. Previously there were
917 false-negatives in the check that the sender had not preempted a response
918 or prompt from Exim (running as a server), due to that code's lack of
919 awareness of the SMTP input buffering.
921 PP/04 Add commandline_checks_require_admin option.
922 Exim drops privileges sanely, various checks such as -be aren't a
923 security problem, as long as you trust local users with access to their
924 own account. When invoked by services which pass untrusted data to
925 Exim, this might be an issue. Set this option in main configuration
926 AND make fixes to the calling application, such as using `--` to stop
929 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
930 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
931 responses to those, into a single TLS record each way (this usually means
932 a single packet). As a side issue, smtp_enforce_sync now works on TLS
935 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
936 affects you only if you're dancing at the edge of the param size limits.
937 If you are, and this message makes sense to you, then: raise the
938 configured limit or use OpenSSL 1.1. Nothing we can do for older
941 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
942 cmdline element to get the documented default one. Previously it was
945 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
946 are unsuable for non-message-specific reasons - eg. connection timeout,
947 banner-time rejection.
949 JH/16 Fix logging of delivery remote port, when specified by router, under
952 PP/06 Repair manualroute's ability to take options in any order, even if one
953 is the name of a transport.
956 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
958 JH/17 Change the list-building routines interface to use the expanding-string
959 triplet model, for better allocation and copying behaviour.
961 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
962 Previously it was constructed the first time a possibly-matching string
963 was met in the configuration file input during startup; now it is done
966 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
967 compatible one, to avoid the (poorly documented) possibility of a config
968 file in the working directory redirecting the DB files, possibly correpting
969 some existing file. CVE-2017-10140 assigned for BDB.
971 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
972 cache-hot. Previously, although the result was properly cached, the
973 initial verify call returned a defer.
975 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
976 the main verify for receipient in uncached-mode.
978 JH/22 Retire historical build files to an "unsupported" subdir. These are
979 defined as "ones for which we have no current evidence of testing".
981 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
982 if present. Previously it was ignored.
984 JH/24 Start using specified-initialisers in C structure init coding. This is
985 a C99 feature (it's 2017, so now considered safe).
987 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
988 if was a fixed-sized field and bitmask ops via macros; it is now more
991 PP/07 GitHub PR 56: Apply MariaDB build fix.
992 Patch provided by Jaroslav Škarvada.
994 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
995 during Coverity cleanups [4.87 JH/47]
996 Diagnosis and fix provided by Michael Fischer v. Mollard.
998 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
999 the right size to place the terminating semicolon on its own folded
1000 line, the header hash was calculated to an incorrect value thanks to
1001 the (relaxed) space the fold became.
1003 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1004 and confused the parent.
1006 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1007 which could crash as a result. This could lead to undeliverable messages.
1009 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1012 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1013 matters on fast-turnover and PID-randomising systems, which were getting
1014 out-of-order delivery.
1016 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1017 a possibly-overlapping copy. The symptom was that "Remote host closed
1018 connection in response to HELO" was logged instead of the actual 4xx
1021 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1022 Previously only that bufferd was discarded, resulting in SYMTP command
1025 JH/32 DKIM: when a message has multiple signatures matching an identity given
1026 in dkim_verify_signers, run the dkim acl once for each. Previously only
1027 one run was done. Bug 2189.
1029 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1030 "panic the current process" to "deliberately defer". The panic log is
1031 still written with the problem list name; the mail and reject logs now
1032 get a temp-reject line for the message that was being handled, saying
1033 something like "domains check lookup or other defer". The SMTP 451
1034 message is still "Temporary local problem".
1036 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1037 A crafted sequence of BDAT commands could result in in-use memory beeing
1038 freed. CVE-2017-16943.
1040 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1041 from SMTP input. Previously it was always done; now only done for DATA
1042 and not BDAT commands. CVE-2017-16944.
1044 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1045 to the message (such as an overlong header line). Previously this was
1046 not done and we did not exit BDAT mode. Followon from the previous item
1047 though a different problem.
1053 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1054 than -2003 did; needs libidn2 in addition to libidn.
1056 JH/02 The path option on a pipe transport is now expanded before use.
1058 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1059 Patch provided by "Björn", documentation fix added too.
1061 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1062 missing a wire-to-host endian conversion.
1064 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1065 close after a BDAT command line could be taken as a following command,
1066 giving a synch failure. Fix by only checking for synch immediately
1067 before acknowledging the chunk.
1069 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1070 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1071 macro. Patches provided by Josh Soref.
1073 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1074 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1075 by IANA as a service extension. However, John Klensin suggests that we
1078 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1079 the dkim code may be unix-mode line endings rather than smtp wire-format
1080 CRLF, so prepend a CR to any bare LF.
1082 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1083 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1085 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1086 the first were themselves being wrongly included in the feed into dkim
1087 processing; with most chunk sizes in use this resulted in an incorrect
1088 body hash calculated value.
1090 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1091 DKIM signature block, for verification. Although advised against by
1092 standards it is specifically not ruled illegal.
1094 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1096 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1097 missing a body hash (the bh= tag).
1099 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1100 It seems that HAProxy sends the Proxy Protocol information in clear and
1101 only then does a TLS startup, so do the same.
1103 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1104 TCP connections (such as for Spamd) unless the daemon successfully set
1105 Fast Open mode on its listening sockets. This fixes breakage seen on
1106 too-old kernels or those not configured for Fast Open, at the cost of
1107 requiring both directions being enabled for TFO, and TFO never being used
1108 by non-daemon-related Exim processes.
1110 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1111 endings, at least on the first header line. Try to canonify any that get
1112 past that check, despite the cost.
1114 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1115 now limited to an arbitrary five deep, while parsing addresses with the
1116 strip_excess_angle_brackets option enabled.
1118 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1119 instead leave the unprompted TLS handshake in socket buffer for the
1120 TLS library to consume.
1122 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1124 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1126 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1127 region in one operation, for speed, and this leaves assigned pointers
1128 dangling. Add checks run only under the testsuite which checks all
1129 variables at a store-reset and panics on a dangling pointer; add code
1130 explicitly nulling out all the variables discovered. Fixes one known
1131 bug: a transport crash, where a dangling pointer for $sending_ip_address
1132 originally assigned in a verify callout, is re-used.
1134 PP/06 Drop '.' from @INC in various Perl scripts.
1136 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1138 PP/08 Reduce a number of compilation warnings under clang; building with
1139 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1140 should be warning-free.
1142 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1144 HS/01 Fix portability problems introduced by PP/08 for platforms where
1145 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1147 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1148 chunk. This allows us to accept broken chunked messages. We need a more
1149 general solution here.
1151 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1152 already-broken messages in the queue.
1154 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1156 JH/19 Fix reference counting bug in routing-generated-address tracking.
1162 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1163 supports it and a size is available (ie. the sending peer gave us one).
1165 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1166 years of being deprecated). The replacements are the ACLs
1167 acl_smtp_mime and acl_not_smtp_mime.
1169 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1170 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1171 or even an in-clear connection were permitted. Now, if the host lookup
1172 was dnssec and dane was requested then the host is only used if the
1173 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1174 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1175 if one fails this test.
1176 This means that a poorly-configured remote DNS will make it incommunicado;
1177 but it protects against a DNS-interception attack on it.
1179 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1180 non-noisy when a race steals the message being considered.
1182 JH/05 If main configuration option tls_certificate is unset, generate a
1183 self-signed certificate for inbound TLS connections.
1185 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1186 in rewrites and routers.
1188 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1189 and logged a warning sing 4.83; now they are a configuration file error.
1191 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1192 (lacking @domain). Apply the same qualification processing as RCPT.
1194 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1196 JH/10 Support ${sha256:} applied to a string (as well as the previous
1199 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1200 a cutthrough deliver is pending, as we always want to make a connection.
1201 This also avoids re-routing the message when later placing the cutthrough
1202 connection after a verify cache hit.
1203 Do not update it with the verify result either.
1205 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1206 when routing results in more than one destination address.
1208 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1209 signing (which inhibits the cutthrough capability). Previously only
1210 the presence of an option was tested; now an expansion evaluating as
1211 empty is permissible (obviously it should depend only on data available
1212 when the cutthrough connection is made).
1214 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1215 the relevant preceding SMTP command did not note the pipelining mode.
1217 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1218 Previously they were not counted.
1220 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1221 as one having no matching records. Previously we deferred the message
1222 that needed the lookup.
1224 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1225 distinguished as "(=".
1227 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1228 for missing MX records. Previously it only worked for missing A records.
1230 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1232 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1233 after the data-go-ahead and data-ack. Patch from Jason Betts.
1235 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1236 even for a "none" policy. Patch from Tony Meyer.
1238 JH/22 Fix continued use of a connection for further deliveries. If a port was
1239 specified by a router, it must also match for the delivery to be
1242 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1243 When one of the recipients of a message was unsuitable for the connection
1244 (has no matching addresses), we lost track of needing to mark it
1245 deferred. As a result mail would be lost.
1247 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1249 JH/25 Decoding ACL controls is now done using a binary search; the source code
1250 takes up less space and should be simpler to maintain. Merge the ACL
1251 condition decode tables also, with similar effect.
1253 JH/26 Fix problem with one_time used on a redirect router which returned the
1254 parent address unchanged. A retry would see the parent address marked as
1255 delivered, so not attempt the (identical) child. As a result mail would
1258 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1259 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1260 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1263 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1264 Main config options check_{log,spool}_{inodes,space} are now
1265 100 inodes, 10MB unless set otherwise in the configuration.
1267 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1268 Previously it only applied to the main-section connection policy
1271 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1273 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1274 by me. Added RFC7919 DH primes as an alternative.
1276 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1277 are not in the system include path.
1279 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1280 GnuTLS, when a session startup failed (eg because the client disconnected)
1281 Exim did stdio operations after fclose. This was exposed by a recent
1282 change which nulled out the file handle after the fclose.
1284 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1285 signed directly by the cert-signing cert, rather than an intermediate
1286 OCSP-signing cert. This is the model used by LetsEncrypt.
1288 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1290 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1291 an incoming connection.
1293 HS/02 Bug 1802: Do not half-close the connection after sending a request
1296 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1297 fallback to "prime256v1".
1299 JH/34 SECURITY: Use proper copy of DATA command in error message.
1300 Could leak key material. Remotely exploitable. CVE-2016-9963.
1306 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1307 and 3.4.4 - once the server is enabled to respond to an OCSP request
1308 it does even when not requested, resulting in a stapling non-aware
1309 client dropping the TLS connection.
1311 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1312 support variable-length bit vectors. No functional change.
1314 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1315 The I= interface field on outgoing lines is now after the H= remote
1316 host field, same as incoming lines. There is a separate
1317 outgoing_interface log selector which allows you to disable the
1320 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1321 If not running log_selector +smtp_connection the mainlog would be held
1322 open indefinitely after a "too many connections" event, including to a
1323 deleted file after a log rotate. Leave the per net connection logging
1324 leaving it open for efficiency as that will be quickly detected by the
1325 check on the next write.
1327 HS/01 Bug 1671: Fix post transport crash.
1328 Processing the wait-<transport> messages could crash the delivery
1329 process if the message IDs didn't exist for some reason. When
1330 using 'split_spool_directory=yes' the construction of the spool
1331 file name failed already, exposing the same netto behaviour.
1333 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1334 mime_regex ACL conditions.
1336 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1337 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1338 to HELO, local diagnostic string.
1340 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1341 log line to debug. Even when configured with a tls authenticator many
1342 client connections are expected to not authenticate in this way, so
1343 an authenticate fail is not an error.
1345 HS/02 Add the Exim version string to the process info. This way exiwhat
1346 gives some more detail about the running daemon.
1348 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1349 matter for fast-change records such as DNSBLs.
1351 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1352 retry record, even if constant. There may be multiple transports with
1353 different interface settings and the retry behaviour needs to be kept
1356 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1358 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1360 JH/10 Bug 840: fix log_defer_output option of pipe transport
1362 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1363 hosts_randomize. This matters a lot when combined with mua_wrapper.
1365 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1366 ${quote_pgsql:<string>} operator.
1368 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1370 JH/14 Change header file name for freeradius-client. Relevant if compiling
1371 with Radius support; from the Gentoo tree and checked under Fedora.
1373 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1375 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1376 option transport_filter, meaning no filtering.
1378 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1380 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1381 defaults to "*" (all hosts). The variable is now available when not built
1382 with TLS, default unset, mainly to enable keeping the testsuite sane.
1383 If a server certificate is not supplied (via tls_certificate) an error is
1384 logged, and clients will find TLS connections fail on startup. Presumably
1385 they will retry in-clear.
1386 Packagers of Exim are strongly encouraged to create a server certificate
1387 at installation time.
1389 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1390 with the $config_file variable.
1392 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1393 in transport context, after the attempt, and per-recipient. The latter type
1394 is per host attempted. The event data is the error message, and the errno
1395 information encodes the lookup type (A vs. MX) used for the (first) host,
1396 and the trailing two digits of the smtp 4xx response.
1398 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1399 to write to mainlog (or rejectlog, paniclog) in the window between file
1400 creation and permissions/ownership being changed. Particularly affects
1401 installations where exicyclog is run as root, rather than exim user;
1402 result is that the running daemon panics and dies.
1404 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1406 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1407 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1408 "pri" and "weight". Note that the previous implicit priority given by the
1409 list order is no longer honoured.
1411 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1412 for DKIM processing.
1414 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1415 by defining SUPPORT_SOCKS.
1417 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1418 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1419 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1420 variables are renamed to proxy_{local,external}_{address,port}.
1422 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1423 for a build by defining SUPPORT_I18N
1425 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1426 of the query string, and make ${quote_redis:} do that quoting.
1428 JH/29 Move Events support from Experimental to mainline, enabled by default
1429 and removable for a build by defining DISABLE_EVENT.
1431 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1433 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1434 cached by the daemon.
1436 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1437 by defining LOOKUP_REDIS. The libhiredis library is required.
1439 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1440 keys are given for lookup.
1442 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1443 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1444 only supported when built with TLS support. The PolarSSL SHA routines
1445 are still used when the TLS library is too old for convenient support.
1447 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1448 openssl_options), for security. OpenSSL forces this from version 1.1.0
1449 server-side so match that on older versions.
1451 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1452 allocation for $value could be released as the expansion processing
1453 concluded, but leaving the global pointer active for it.
1455 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1456 and to use the domains and local_parts ACL conditions.
1458 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1459 incorrectly not doubled on cutthrough transmission, hence seen as a
1460 body-termination at the receiving system - resulting in truncated mails.
1461 Commonly the sender saw a TCP-level error, and retransmitted the message
1462 via the normal store-and-forward channel. This could result in duplicates
1463 received - but deduplicating mailstores were liable to retain only the
1464 initial truncated version.
1466 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1468 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1470 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1471 we're in there, support oversigning also; bug 1309.
1473 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1475 HS/04 Add support for keep_environment and add_environment options.
1477 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1478 either intentional arithmetic overflow during PRNG, or testing config-
1481 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1482 delivery resulted in actual delivery. Cancel cutthrough before DATA
1485 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1486 rejects a recipient: pass the reject to the originator.
1488 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1489 Many were false-positives and ignorable, but it's worth fixing the
1492 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1493 for the new environment-manipulation done at startup. Move the routines
1494 from being local to tls.c to being global via the os.c file.
1496 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1497 an extract embedded as result-arg for a map, the first arg for extract
1498 is unavailable so we cannot tell if this is a numbered or keyed
1499 extraction. Accept either.
1505 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1508 JH/02 The smtp transport option "multi_domain" is now expanded.
1510 JH/03 The smtp transport now requests PRDR by default, if the server offers
1513 JH/04 Certificate name checking on server certificates, when exim is a client,
1514 is now done by default. The transport option tls_verify_cert_hostnames
1515 can be used to disable this per-host. The build option
1516 EXPERIMENTAL_CERTNAMES is withdrawn.
1518 JH/05 The value of the tls_verify_certificates smtp transport and main options
1519 default to the word "system" to access the system default CA bundle.
1520 For GnuTLS, only version 3.0.20 or later.
1522 JH/06 Verification of the server certificate for a TLS connection is now tried
1523 (but not required) by default. The verification status is now logged by
1524 default, for both outbound TLS and client-certificate supplying inbound
1527 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1530 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1531 Status Notification (bounce) messages are now MIME format per RFC 3464.
1532 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1533 under the control of the dsn_advertise_hosts option, and routers may
1534 have a dsn_lasthop option.
1536 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1537 default, modifiable by a malware= option. The list separator for
1538 the options can now be changed in the usual way. Bug 68.
1540 JH/10 The smtp_receive_timeout main option is now expanded before use.
1542 JH/11 The incoming_interface log option now also enables logging of the
1543 local interface on delivery outgoing connections.
1545 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1546 if the interface and destination host and port all match.
1548 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1551 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1552 Patch from Andrew Lewis.
1554 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1555 now supports optional time-restrictions, weighting, and priority
1556 modifiers per server. Patch originally by <rommer@active.by>.
1558 JH/16 The spamd_address main option now supports a mixed list of local
1559 and remote servers. Remote servers can be IPv6 addresses, and
1560 specify a port-range.
1562 JH/17 Bug 68: The spamd_address main option now supports an optional
1563 timeout value per server.
1565 JH/18 Bug 1581: Router and transport options headers_add/remove can
1566 now have the list separator specified.
1568 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1571 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1574 JH/21 Support for the A6 type of dns record is withdrawn.
1576 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1577 rather than the verbs used.
1579 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1580 from 255 to 1024 chars.
1582 JH/24 Verification callouts now attempt to use TLS by default.
1584 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1585 are generic router options now. The defaults didn't change.
1587 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1588 Original patch from Alexander Shikoff, worked over by JH.
1590 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1591 files if ZCAT_COMMAND is not executable.
1593 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1595 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1597 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1598 Normally benign, it bites when the pair was led to by a CNAME;
1599 modern usage is to not canonicalize the domain to a CNAME target
1600 (and we were inconsistent anyway for A-only vs AAAA+A).
1602 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1604 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1605 when evaluating $sender_host_dnssec.
1607 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1608 $sender_helo_dnssec variable.
1610 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1612 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1614 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1616 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1617 documented as working, but never had. Support all but $spam_report.
1619 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1620 added for tls authenticator.
1622 HS/03 Add perl_taintmode main config option
1628 TL/01 When running the test suite, the README says that variables such as
1629 no_msglog_check are global and can be placed anywhere in a specific
1630 test's script, however it was observed that placement needed to be near
1631 the beginning for it to behave that way. Changed the runtest perl
1632 script to read through the entire script once to detect and set these
1633 variables, reset to the beginning of the script, and then run through
1634 the script parsing/test process like normal.
1636 TL/02 The BSD's have an arc4random API. One of the functions to induce
1637 adding randomness was arc4random_stir(), but it has been removed in
1638 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1639 function when detected.
1641 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1642 cause callback expansion.
1644 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1645 syntax errors in an expansion can be treated as a string instead of
1646 logging or causing an error, due to the internal use of bool_lax
1647 instead of bool when processing it.
1649 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1650 server certificates when making smtp deliveries.
1652 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1654 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1656 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1658 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1659 Merged patch from Sebastian Wiedenroth.
1661 JH/05 Fix results-pipe from transport process. Several recipients, combined
1662 with certificate use, exposed issues where response data items split
1663 over buffer boundaries were not parsed properly. This eventually
1664 resulted in duplicates being sent. This issue only became common enough
1665 to notice due to the introduction of connection certificate information,
1666 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1668 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1669 size buffer was used, resulting in syntax errors when an expansion
1672 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1673 version 3.3.6 or later.
1675 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1676 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1677 both become "event_action", the variables become $event_name, $event_data
1678 and $event_defer_errno. There is a new variable $verify_mode, usable in
1679 routers, transports and related events. The tls:cert event is now also
1680 raised for inbound connections, if the main configuration event_action
1683 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1684 early OCSP support, but no stapling (appears to be less than 1.0.0).
1686 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1687 server certificate names available under the smtp transport option
1688 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1691 JH/10 Time-related extraction expansions from certificates now use the main
1692 option "timezone" setting for output formatting, and are consistent
1693 between OpenSSL and GnuTLS compilations. Bug 1541.
1695 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1696 encoded parameter in the incoming message. Bug 1558.
1698 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1699 include certificate info, eximon was claiming there were spoolfile
1702 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1704 JH/14 Log delivery-related information more consistently, using the sequence
1705 "H=<name> [<ip>]" wherever possible.
1707 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1708 are problematic for Debian distribution, omit them from the release
1711 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1713 JH/16 Fix string representation of time values on 64bit time_t architectures.
1716 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1717 output list separator was used.
1722 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1723 checkers that were complaining about end of non-void function with no
1726 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1727 This was a regression introduced in 4.83 by another bugfix.
1729 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1731 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1732 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1738 TF/01 Correctly close the server side of TLS when forking for delivery.
1740 When a message was received over SMTP with TLS, Exim failed to clear up
1741 the incoming connection properly after forking off the child process to
1742 deliver the message. In some situations the subsequent outgoing
1743 delivery connection happened to have the same fd number as the incoming
1744 connection previously had. Exim would try to use TLS and fail, logging
1745 a "Bad file descriptor" error.
1747 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1748 utilities have not been installed.
1750 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1751 temporary space as the ACL may create new global variables.
1753 TL/01 LDAP support uses per connection or global context settings, depending
1754 upon the detected version of the libraries at build time.
1756 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1757 to extract and use the src ip:port in logging and expansions as if it
1758 were a direct connection from the outside internet. PPv2 support was
1759 updated based on HAProxy spec change in May 2014.
1761 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1763 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1764 Properly escape header and check for NULL return.
1766 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1769 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1771 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1772 characters in header names, implemented as a verify condition.
1773 Contributed by Michael Fischer v. Mollard.
1775 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1776 results permerror and temperror. Previous values are deprecated but
1777 still accepted. In a future release, err_perm and err_temp will be
1778 completely removed, which will be a backward incompatibility if the
1779 ACL tests for either of these two old results. Patch contributed by
1780 user bes-internal on the mailing list.
1782 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1784 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1785 selectors, in both main and reject logs.
1787 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1790 JH/07 Add malware type "sock" for talking to simple daemon.
1792 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1794 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1795 routers/transports under cutthrough routing.
1797 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1798 numbers. Touch up "bool" conditional to keep the same definition.
1800 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1802 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1804 JH/12 Expand items in router/transport headers_add or headers_remove lists
1805 individually rather than the list as a whole. Bug 1452.
1807 Required for reasonable handling of multiple headers_ options when
1808 they may be empty; requires that headers_remove items with embedded
1809 colons must have them doubled (or the list-separator changed).
1811 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1812 view the policy declared in the DMARC record. Currently, $dmarc_status
1813 is a combined value of both the record presence and the result of the
1816 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1818 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1819 dnslookup router and the smtp transport (applying to the forward
1822 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1823 of ldap servers used for a specific lookup. Patch provided by Heiko
1826 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1827 New variable $lookup_dnssec_authenticated for observability.
1829 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1830 Patch submitted by Lars Timman.
1832 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1834 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1835 Requires trusted mode and valid format message id, aborts otherwise.
1836 Patch contributed by Heiko Schlichting.
1838 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1839 certextract with support for various fields. Bug 1358.
1841 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1842 is requested by default, modifiable by smtp transport option
1845 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1846 operate on certificate variables to give certificate fingerprints
1847 Also new ${sha256:cert_variable}.
1849 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1851 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1852 Christian Aistleitner.
1854 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1856 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1857 file. Patch from Wolfgang Breyha.
1859 JH/25 Expand the coverage of the delivery $host and $host_address to
1860 client authenticators run in verify callout. Bug 1476.
1862 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1863 align with daemon_smtp_ports. Bug 72.
1865 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1866 support and error reporting did not work properly.
1868 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1869 and is readable. Patch from Andrew Colin Kissa.
1871 TL/14 Enhance documentation of ${run expansion and how it parses the
1872 commandline after expansion, particularly in the case when an
1873 unquoted variable expansion results in an empty value.
1875 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1877 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1878 by renaming away from it. Addresses GH issue 15, reported by
1881 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1883 TL/15 SECURITY: prevent double expansion in math comparison functions
1884 (can expand unsanitized data). Not remotely exploitable.
1891 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1893 PP/02 Make -n do something, by making it not do something.
1894 When combined with -bP, the name of an option is not output.
1896 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1899 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1900 $sender_host_name and config options to manage this, and basic check
1903 PP/05 DSCP support for outbound connections and control modifier for inbound.
1905 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1906 (Only plugin which currently uses this is kerberos4, which nobody should
1907 be using, but we should make it available and other future plugins might
1908 conceivably use it, even though it would break NAT; stuff *should* be
1909 using channel bindings instead).
1911 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1912 name; added for Sendmail compatibility; requires admin caller.
1913 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1914 just ignore it); requires trusted caller.
1915 Also parse but ignore: -Ac -Am -X<logfile>
1918 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1920 TL/02 Add +smtp_confirmation as a default logging option.
1922 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1923 Patch by Magnus Holmgren from 2007-02-20.
1925 TL/04 Bugzilla 1281 - Spec typo.
1926 Bugzilla 1283 - Spec typo.
1927 Bugzilla 1290 - Spec grammar fixes.
1929 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1931 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1933 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1934 mailing list by by Dmitry Isaikin.
1936 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1938 JH/02 Support "G" suffix to numbers in ${if comparisons.
1940 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1942 NM/01 Bugzilla 1197 - Spec typo
1943 Bugzilla 1196 - Spec examples corrections
1945 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1947 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1948 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1951 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1952 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1954 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1955 "acl {{name}{arg}...}", and optional args on acl condition
1958 JH/05 Permit multiple router/transport headers_add/remove lines.
1960 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1962 JH/07 Avoid using a waiting database for a single-message-only transport.
1963 Performance patch from Paul Fisher. Bugzilla 1262.
1965 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1968 JH/09 Add $headers_added variable, with content from use of ACL modifier
1969 add_header (but not yet added to the message). Bugzilla 199.
1971 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1972 Pulled from Bugzilla 817 by Wolfgang Breyha.
1974 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1976 (nb: this is the same fix as in Exim 4.80.1)
1978 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1981 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1984 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1986 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1987 advertise SMTP AUTH mechanism to us, instead of a generic
1988 protocol violation error. Also, make Exim more robust to bad
1989 data from the Dovecot auth socket.
1991 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1993 When a queue runner is handling a message, Exim first routes the
1994 recipient addresses, during which it prunes them based on the retry
1995 hints database. After that it attempts to deliver the message to
1996 any remaining recipients. It then updates the hints database using
1999 So if a recipient address works intermittently, it can get repeatedly
2000 deferred at routing time. The retry hints record remains fresh so the
2001 address never reaches the final cutoff time.
2003 This is a fairly common occurrence when a user is bumping up against
2004 their storage quota. Exim had some logic in its local delivery code
2005 to deal with this. However it did not apply to per-recipient defers
2006 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2008 This change adds a proper retry rule check during routing so that the
2009 final cutoff time is checked against the message's age. We only do
2010 this check if there is an address retry record and there is not a
2011 domain retry record; this implies that previous attempts to handle
2012 the address had the retry_use_local_parts option turned on. We use
2013 this as an approximation for the destination being like a local
2014 delivery, as in LMTP.
2016 I suspect this new check makes the old local delivery cutoff check
2017 redundant, but I have not verified this so I left the code in place.
2019 TF/02 Correct gecos expansion when From: is a prefix of the username.
2021 Test 0254 submits a message to Exim with the header
2025 When I ran the test suite under the user fanf2, Exim expanded
2026 the header to contain my full name, whereas it should have added
2027 a Resent-Sender: header. It erroneously treats any prefix of the
2028 username as equal to the username.
2030 This change corrects that bug.
2032 GF/01 DCC debug and logging tidyup
2033 Error conditions log to paniclog rather than rejectlog.
2034 Debug lines prefixed by "DCC: " to remove any ambiguity.
2036 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2038 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2039 Bug spotted by Jeremy Harris; was flawed since initial commit.
2040 Would have resulted in OCSP responses post-SNI triggering an Exim
2041 NULL dereference and crash.
2043 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2045 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2046 Bug detection, analysis and fix by Samuel Thibault.
2047 Bugzilla 1331, Debian bug #698092.
2049 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2051 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2052 Server implementation by Todd Lyons, client by JH.
2053 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2054 config variable "prdr_enable" controls whether the server
2055 advertises the facility. If the client requests PRDR a new
2056 acl_data_smtp_prdr ACL is called once for each recipient, after
2057 the body content is received and before the acl_smtp_data ACL.
2058 The client is controlled by both of: a hosts_try_prdr option
2059 on the smtp transport, and the server advertisement.
2060 Default client logging of deliveries and rejections involving
2061 PRDR are flagged with the string "PRDR".
2063 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2064 fclose(). Diagnosis by Todd Lyons.
2066 PP/17 Update configure.default to handle IPv6 localhost better.
2067 Patch by Alain Williams (plus minor tweaks).
2070 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2071 This is now consistent with GnuTLS, and is now documented: the
2072 previous undocumented portable approach to treating the option as
2073 unset was to force an expansion failure. That still works, and
2074 an empty string is now equivalent.
2076 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2077 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2078 not performing validation itself.
2080 PP/20 Added force_command boolean option to pipe transport.
2081 Patch from Nick Koston, of cPanel Inc.
2083 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2086 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2088 PP/21 Fix eximon continuous updating with timestamped log-files.
2089 Broken in a format-string cleanup in 4.80, missed when I repaired the
2090 other false fix of the same issue.
2091 Report and fix from Heiko Schlichting.
2094 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2095 Report from Prashanth Katuri.
2097 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2098 It's SecureTransport, so affects any MacOS clients which use the
2099 system-integrated TLS libraries, including email clients.
2101 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2102 using a MIME ACL for non-SMTP local injection.
2103 Report and assistance in diagnosis by Warren Baker.
2105 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2107 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2109 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2110 last id that failed so it may be referenced in subsequent ACL's.
2112 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2115 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2116 ldap library initialization, allowing self-signed CA's to be
2117 used. Also properly sets require_cert option later in code by
2118 using NULL (global ldap config) instead of ldap handle (per
2119 session). Bug diagnosis and testing by alxgomz.
2121 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2122 the src/util/ subdirectory.
2124 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2125 renamed to Transport Post Delivery Action by Jeremy Harris, as
2128 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2129 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2130 redis_servers = needs to be configured which will be used by the redis
2131 lookup. Patch from Warren Baker, of The Packet Hub.
2133 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2135 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2136 hostname or reverse DNS when processing a host list. Used suggestions
2137 from multiple comments on this bug.
2139 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2141 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2142 Missed a few lines, added it to make the runtest require no keyboard
2145 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2146 contains upper case chars. Make router use caseful_local_part.
2148 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2149 support when GnuTLS has been built with p11-kit.
2155 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2157 This, or similar/improved, will also be change PP/11 of 4.82.
2163 PP/01 Handle short writes when writing local log-files.
2164 In practice, only affects FreeBSD (8 onwards).
2165 Bugzilla 1053, with thanks to Dmitry Isaikin.
2167 NM/01 Bugzilla 949 - Documentation tweak
2169 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2172 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2174 PP/02 Implemented gsasl authenticator.
2176 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2178 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2179 `pkg-config foo` for cflags/libs.
2181 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2182 with rest of GSASL and with heimdal_gssapi.
2184 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2185 `pkg-config foo` for cflags/libs for the TLS implementation.
2187 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2188 properties get this fed in as external SSF. A number of robustness
2189 and debugging improvements to the cyrus_sasl authenticator.
2191 PP/08 cyrus_sasl server now expands the server_realm option.
2193 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2194 Patch by Jeremy Harris.
2196 PP/10 Added dbmjz lookup type.
2198 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2200 PP/12 MAIL args handles TAB as well as SP, for better interop with
2201 non-compliant senders.
2202 Analysis and variant patch by Todd Lyons.
2204 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2205 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2206 Patch from Dirk Mueller <dmueller@suse.com>
2208 PP/13 tls_peerdn now print-escaped for spool files.
2209 Observed some $tls_peerdn in wild which contained \n, which resulted
2210 in spool file corruption.
2212 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2213 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2214 or write after TLS renegotiation, which otherwise led to messages
2217 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2218 as a tracking header (ie: a signed header comes before the signature).
2219 Patch from Wolfgang Breyha.
2221 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2222 comma-sep list; embedded commas doubled.
2224 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2226 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2228 Report and patch from Dmitry Banschikov.
2230 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2231 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2232 failures. We appear to now support TLS1.1+ with Exim.
2234 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2235 lets Exim select keys and certificates based upon TLS SNI from client.
2236 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2237 before an outbound SMTP session. New log_selector, +tls_sni.
2239 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2240 NULL dereference. Report and patch from Alun Jones.
2242 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2243 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2244 Not seeing resolver debug output on NetBSD, but suspect this is a
2245 resolver implementation change.
2247 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2248 Left warnings. Added "eximon gdb" invocation mode.
2250 PP/21 Defaulting "accept_8bitmime" to true, not false.
2252 PP/22 Added -bw for inetd wait mode support.
2254 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2255 locate the relevant includes and libraries. Made this the default.
2257 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2258 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2260 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2261 This may cause build issues on older platforms.
2263 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2264 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2265 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2266 Added SNI support via GnuTLS too.
2267 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2269 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2271 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2272 Applied second patch from Janne, implementing suggestion to default
2273 multiple-strings-in-record handling to match SPF spec.
2275 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2277 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2278 read-only, out of scope).
2279 Patch from Wolfgang Breyha, report from Stuart Northfield.
2281 PP/29 Fix three issues highlighted by clang analyser static analysis.
2282 Only crash-plausible issue would require the Cambridge-specific
2283 iplookup router and a misconfiguration.
2284 Report from Marcin Mirosław.
2286 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2288 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2289 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2290 As part of this, removing so much warning spew let me fix some minor
2291 real issues in debug logging.
2293 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2294 assignment on my part. Fixed.
2296 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2297 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2298 Janne Snabb (who went above and beyond: thank you).
2300 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2301 string otherwise requires a connection and a bunch more work and it's
2302 relatively easy to get wrong. Should also expose TLS library linkage
2305 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2306 64-bit ${eval} (JH/03).
2308 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2309 GNU libc to support some of the 64-bit stuff, should not lead to
2310 conflicts. Defined before os.h is pulled in, so if a given platform
2311 needs to override this, it can.
2313 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2314 protection layer was required, which is not implemented.
2315 Bugzilla 1254, patch from Wolfgang Breyha.
2317 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2318 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2319 tls_dhparam take prime identifiers. Also unbreak combination of
2320 OpenSSL+DH_params+TLSSNI.
2322 PP/39 Disable SSLv2 by default in OpenSSL support.
2328 PP/01 Solaris build fix for Oracle's LDAP libraries.
2329 Bugzilla 1109, patch from Stephen Usher.
2331 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2333 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2336 TF/02 Fix a couple more cases where we did not log the error message
2337 when unlink() failed. See also change 4.74-TF/03.
2339 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2340 lock up or crash if it happened to be inside a call to libc when it
2341 got a SIGUSR1 from exiwhat.
2343 The SIGUSR1 handler appends the current process status to the process
2344 log which is later printed by exiwhat. It used to use the general
2345 purpose logging code to do this, but several functions it calls are
2346 not safe for signals.
2348 The new output code in the SIGUSR1 handler is specific to the process
2349 log, and simple enough that it's easy to inspect for signal safety.
2350 Removing some special cases also simplifies the general logging code.
2351 Removing the spurious timestamps from the process log simplifies
2354 TF/04 Improved ratelimit ACL condition.
2356 The /noupdate option has been deprecated in favour of /readonly which
2357 has clearer semantics. The /leaky, /strict, and /readonly update modes
2358 are mutually exclusive. The update mode is no longer included in the
2359 database key; it just determines when the database is updated. (This
2360 means that when you upgrade Exim will forget old rate measurements.)
2362 Exim now checks that the per_* options are used with an update mode that
2363 makes sense for the current ACL. For example, when Exim is processing a
2364 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2365 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2366 must specify per_mail/readonly. If you omit the update mode it defaults to
2367 /leaky where that makes sense (as before) or /readonly where required.
2369 The /noupdate option is now undocumented but still supported for
2370 backwards compatibility. It is equivalent to /readonly except that in
2371 ACLs where /readonly is required you may specify /leaky/noupdate or
2372 /strict/noupdate which are treated the same as /readonly.
2374 A useful new feature is the /count= option. This is a generalization
2375 of the per_byte option, so that you can measure the throughput of other
2376 aggregate values. For example, the per_byte option is now equivalent
2377 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2379 The per_rcpt option has been generalized using the /count= mechanism
2380 (though it's more complicated than the per_byte equivalence). When it is
2381 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2382 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2383 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2384 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2385 Note that using per_rcpt with a non-readonly update mode in more than
2386 one ACL will cause the recipients to be double-counted. (The per_mail
2387 and per_byte options don't have this problem.)
2389 The handling of very low rates has changed slightly. If the computed rate
2390 is less than the event's count (usually one) then this event is the first
2391 after a long gap. In this case the rate is set to the same as this event's
2392 count, so that the first message of a spam run is counted properly.
2394 The major new feature is a mechanism for counting the rate of unique
2395 events. The new per_addr option counts the number of different
2396 recipients that someone has sent messages to in the last time period. It
2397 behaves like per_rcpt if all the recipient addresses are different, but
2398 duplicate recipient addresses do not increase the measured rate. Like
2399 the /count= option this is a general mechanism, so the per_addr option
2400 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2401 example, measure the rate that a client uses different sender addresses
2402 with the options per_mail/unique=$sender_address. There are further
2403 details in the main documentation.
2405 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2407 TF/06 Removed a few PCRE remnants.
2409 TF/07 Automatically extract Exim's version number from tags in the git
2410 repository when doing development or release builds.
2412 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2413 Bugzilla 879. Patch from Paul Fisher.
2415 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2416 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2419 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2421 PP/05 Variable $av_failed, true if the AV scanner deferred.
2422 Bugzilla 1078. Patch from John Horne.
2424 PP/06 Stop make process more reliably on build failure.
2425 Bugzilla 1087. Patch from Heiko Schlittermann.
2427 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2428 Bugzilla 1089. Patch from Heiko Schlittermann.
2430 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2431 Bugzilla 1131. Patch from Holger Weiß.
2433 PP/09 Handle IPv6 addresses with SPF.
2434 Bugzilla 860. Patch from Wolfgang Breyha.
2436 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2438 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2441 PP/11 match_* no longer expand right-hand-side by default.
2442 New compile-time build option, EXPAND_LISTMATCH_RHS.
2443 New expansion conditions, "inlist", "inlisti".
2445 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2447 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2449 PP/14 fix log_write() format string regression from TF/03.
2450 Bugzilla 1152. Patch from Dmitry Isaikin.
2456 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2458 PP/02 Harmonised TLS library version reporting; only show if debugging.
2459 Layout now matches that introduced for other libraries in 4.74 PP/03.
2461 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2463 PP/04 New "dns_use_edns0" global option.
2465 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2468 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2469 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2471 TK/01 Updated PolarSSL code to 0.14.2.
2472 Bugzilla 1097. Patch from Andreas Metzler.
2474 PP/07 Catch divide-by-zero in ${eval:...}.
2475 Fixes bugzilla 1102.
2477 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2480 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2481 format-string attack -- SECURITY: remote arbitrary code execution.
2483 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2484 time unintentionally subject to list matching rules, letting the header
2485 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2486 arbitrary string expansion). This allowed for information disclosure.
2488 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2489 INT_MIN/-1 -- value coerced to INT_MAX.
2495 NM/01 Workaround for PCRE version dependency in version reporting
2498 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2499 This fixes portability to compilers other than gcc, notably
2500 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2502 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2503 makefiles for portability to HP-UX and POSIX correctness.
2505 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2506 Also via indented variable definition in the Makefile.
2507 (Debugging by Oliver Heesakkers).
2509 PP/02 Restore caching of spamd results with expanded spamd_address.
2510 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2512 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2513 Improves build reliability. Fix from: Frank Elsner
2515 NM/02 Fix wide character breakage in the rfc2047 coding
2516 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2518 NM/03 Allow underscore in dnslist lookups
2519 Fixes bug 1026. Patch from Graeme Fowler
2521 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2522 Code patches from Adam Ciarcinski of NetBSD.
2524 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2527 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2528 is logged, to avoid truncation. Patch from John Horne.
2530 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2531 Patch from Jakob Hirsch.
2533 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2534 SQL string expansion failure details.
2535 Patch from Andrey Oktyabrski.
2537 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2538 Patch from Simon Arlott.
2540 PP/09 New lookups functionality failed to compile on old gcc which rejects
2541 extern declarations in function scope.
2542 Patch from Oliver Fleischmann
2544 PP/10 Use sig_atomic_t for flags set from signal handlers.
2545 Check getgroups() return and improve debugging.
2546 Fixed developed for diagnosis in bug 927 (which turned out to be
2549 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2550 Patch from Mark Zealey.
2552 PP/12 Bugzilla 1056: Improved spamd server selection.
2553 Patch from Mark Zealey.
2555 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2556 Based on patch from Heiko Schlittermann.
2558 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2559 Patch from Uwe Doering, sign-off by Michael Haardt.
2561 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2562 variable declaration deep within a block. Bug and patch from
2565 PP/15 lookups-Makefile IRIX compatibility coercion.
2567 PP/16 Make DISABLE_DKIM build knob functional.
2569 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2570 Patch by Simon Arlott
2572 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2573 variable argument macros. Our copy now differs from upstream.
2579 TF/01 Failure to get a lock on a hints database can have serious
2580 consequences so log it to the panic log.
2582 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2583 controlled using the smtp_confirmation log selector.
2585 TF/03 Include the error message when we fail to unlink a spool file.
2587 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2588 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2589 for maintaining out-of-tree patches for some time.
2591 PP/01 Bugzilla 139: Documentation and portability issues.
2592 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2593 Handle per-OS dynamic-module compilation flags.
2595 PP/02 Let /dev/null have normal permissions.
2596 The 4.73 fixes were a little too stringent and complained about the
2597 permissions on /dev/null. Exempt it from some checks.
2598 Reported by Andreas M. Kirchwitz.
2600 PP/03 Report version information for many libraries, including
2601 Exim version information for dynamically loaded libraries. Created
2602 version.h, now support a version extension string for distributors
2603 who patch heavily. Dynamic module ABI change.
2605 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2606 privilege escalation vulnerability whereby the Exim run-time user
2607 can cause root to append content of the attacker's choosing to
2610 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2613 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2614 If dropping privileges for untrusted macros, we disabled normal logging
2615 on the basis that it would fail; for the Exim run-time user, this is not
2616 the case, and it resulted in successful deliveries going unlogged.
2617 Fixed. Reported by Andreas Metzler.
2623 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2624 only prepend for the Resent-* case. Fixes regression introduced in
2625 Exim 4.70 by NM/22 for Bugzilla 607.
2627 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2628 increasing numbers of administrators be bitten by this.
2630 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2632 PP/03 Bugzilla 994: added openssl_options main configuration option.
2634 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2636 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2638 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2640 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2641 without a peer certificate, leading to a segfault because of an
2642 assumption that peers always have certificates. Be a little more
2643 paranoid. Problem reported by Martin Tscholak.
2645 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2646 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2647 NB: ClamAV planning to remove STREAM in "middle of 2010".
2648 CL also introduces -bmalware, various -d+acl logging additions and
2649 more caution in buffer sizes.
2651 PP/09 Implemented reverse_ip expansion operator.
2653 PP/10 Bugzilla 937: provide a "debug" ACL control.
2655 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2657 PP/12 Bugzilla 973: Implement --version.
2659 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2661 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2663 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2665 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2666 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2667 ignore trailing whitespace.
2669 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2671 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2674 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2675 Notification from Dr Andrew Aitchison.
2677 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2678 ExtendedDetectionInfo response format.
2679 Notification from John Horne.
2681 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2684 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2685 XSL and documented dependency on system catalogs, with examples of how
2688 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2691 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2692 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2693 configuration file which is writeable by the Exim user or group.
2695 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2696 of configuration files to cover files specified with the -C option if
2697 they are going to be used with root privileges, not just the default
2700 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2701 option (effectively making it always true).
2703 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2704 files to be used while preserving root privileges.
2706 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2707 that rogue child processes cannot use them.
2709 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2710 run-time user, instead of root.
2712 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2713 Exim run-time user without dropping privileges.
2715 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2716 result string, instead of calling string_vformat() twice with the same
2719 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2720 for other users. Others should always drop root privileges if they use
2721 -C on the command line, even for a whitelisted configure file.
2723 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2725 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2731 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2732 $data_path, and $header_path variables; fixed documentation bugs and
2735 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2736 exipick to access non-standard spools, including the "frozen" queue
2739 NM/01 Bugzilla 965: Support mysql stored procedures.
2740 Patch from Alain Williams
2742 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2744 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2745 Patch from Andreas Metzler
2747 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2748 Patch from Kirill Miazine
2750 NM/05 Bugzilla 671: Added umask to procmail example.
2752 JJ/03 installed exipick 20100323.0, fixing doc bug
2754 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2755 directory. Notification and patch from Dan Rosenberg.
2757 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2759 TK/02 Improve log output when DKIM signing operation fails.
2761 MH/01 Treat the transport option dkim_domain as a colon separated
2762 list, not as a single string, and sign the message with each element,
2763 omitting multiple occurences of the same signer.
2765 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2766 Bugzilla 985, 986. Patch by Simon Arlott
2768 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2769 Patch by Simon Arlott
2771 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2772 MBX locking. Notification from Dan Rosenberg.
2778 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2780 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2782 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2784 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2786 NM/04 Bugzilla 915: Flag broken perl installation during build.
2792 TK/01 Added patch by Johannes Berg that expands the main option
2793 "spamd_address" if it starts with a dollar sign.
2795 TK/02 Write list of recipients to X-Envelope-Sender header when building
2796 the mbox-format spool file for content scanning (suggested by Jakob
2799 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2800 (http://www.dcc-servers.net/) support via dccifd. Activated by
2801 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2803 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2804 by Mark Daniel Reidel <mr@df.eu>.
2806 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2807 When building exim an external PCRE library is now needed -
2808 PCRE is a system library on the majority of modern systems.
2809 See entry on PCRE_LIBS in EDITME file.
2811 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2812 conversation. Added nologin parameter to request.
2813 Patch contributed by Kirill Miazine.
2815 TF/01 Do not log submission mode rewrites if they do not change the address.
2817 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2819 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2820 log files in place. Contributed by Roberto Lima.
2822 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2824 TF/03 Bugzilla 615: When checking the local_parts router precondition
2825 after a local_part_suffix or local_part_prefix option, Exim now
2826 does not use the address's named list lookup cache, since this
2827 contains cached lookups for the whole local part.
2829 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2830 Robert Millan. Documentation is in experimental-spec.txt.
2832 TF/04 Bugzilla 668: Fix parallel build (make -j).
2834 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2836 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2837 Patch provided by Jan Srzednicki.
2839 TF/05 Leading white space used to be stripped from $spam_report which
2840 wrecked the formatting. Now it is preserved.
2842 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2843 that they are available at delivery time.
2845 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2847 TF/08 TLS error reporting now respects the incoming_interface and
2848 incoming_port log selectors.
2850 TF/09 Produce a more useful error message if an SMTP transport's hosts
2851 setting expands to an empty string.
2853 NM/06 Bugzilla 744: EXPN did not work under TLS.
2854 Patch provided by Phil Pennock.
2856 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2857 Patch provided by Richard Godbee.
2859 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2860 acl_smtp_notquit, added index entry.
2862 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2863 Patch provided by Eugene Bujak.
2865 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2866 accept(). Patch provided by Maxim Dounin.
2868 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2869 Patch provided by Phil Pennock.
2871 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2873 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2874 Patch provided by Brad "anomie" Jorsch.
2876 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2877 Patch provided by Dean Brooks.
2879 TK/05 Add native DKIM support (does not depend on external libraries).
2881 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2882 Patch provided by Graeme Fowler.
2884 NM/16 Bugzilla 851: Documentation example syntax fix.
2886 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2888 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2891 NM/19 Bugzilla 745: TLS version reporting.
2892 Patch provided by Phil Pennock.
2894 NM/20 Bugzilla 167: bool: condition support.
2895 Patch provided by Phil Pennock.
2897 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2898 clients. Patch provided by Phil Pennock.
2900 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2901 Patch provided by Brad "anomie" Jorsch.
2903 NM/23 Bugzilla 687: Fix misparses in eximstats.
2904 Patch provided by Heiko Schlittermann.
2906 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2907 Patch provided by Heiko Schlittermann.
2909 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2910 plus update to original patch.
2912 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2914 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2915 Patch provided by David Brownlee.
2917 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2919 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2921 NM/30 Bugzilla 888: TLS documentation bugfixes.
2923 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2925 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2926 Unlike the original bugzilla I have changed all shell scripts in src tree.
2928 NM/33 Bugzilla 898: Transport filter timeout fix.
2929 Patch by Todd Rinaldo.
2931 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2932 Patch by Serge Demonchaux.
2934 NM/35 Bugzilla 39: Base64 decode bug fixes.
2935 Patch by Jakob Hirsch.
2937 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2939 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2941 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2943 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2949 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2950 ALT-N's libdkim that I have put here:
2951 http://duncanthrax.net/exim-experimental/
2953 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2954 were called 'true' and it seems that C99 defines that as a reserved
2955 keyword to be used with 'bool' variable types. That means you could
2956 not include C99-style headers which use bools without triggering
2957 build errors in sieve.c.
2959 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2960 as mailq or other aliases. Changed the --help handling significantly
2961 to do whats expected. exim_usage() emits usage/help information.
2963 SC/01 Added the -bylocaldomain option to eximstats.
2965 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2967 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2969 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2975 PH/01 Another patch from the Sieve maintainer.
2977 PH/02 When an IPv6 address is converted to a string for single-key lookup
2978 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2979 dots are used instead of colons so that keys in lsearch files need not
2980 contain colons. This was done some time before quoting was made available
2981 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2982 (notated using the quote facility) so as to distinguish them from IPv4
2983 keys. This meant that lookups for IP addresses in host lists did not work
2984 for iplsearch lookups.
2986 This has been fixed by arranging for IPv6 addresses to be expressed with
2987 colons if the lookup type is iplsearch. This is not incompatible, because
2988 previously such lookups could never work.
2990 The situation is now rather anomalous, since one *can* have colons in
2991 ordinary lsearch keys. However, making the change in all cases is
2992 incompatible and would probably break a number of configurations.
2994 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2997 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2998 conversion specification without a maximum field width, thereby enabling
2999 a rogue spamd server to cause a buffer overflow. While nobody in their
3000 right mind would setup Exim to query an untrusted spamd server, an
3001 attacker that gains access to a server running spamd could potentially
3002 exploit this vulnerability to run arbitrary code as the Exim user.
3004 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3005 $primary_hostname instead of what libspf2 thinks the hosts name is.
3007 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3008 a directory entry by the name of the lookup key. Previously, if a
3009 symlink pointed to a non-existing file or a file in a directory that
3010 Exim lacked permissions to read, a lookup for a key matching that
3011 symlink would fail. Now it is enough that a matching directory entry
3012 exists, symlink or not. (Bugzilla 503.)
3014 PH/03 The body_linecount and body_zerocount variables are now exported in the
3017 PH/04 Added the $dnslist_matched variable.
3019 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3020 This means they are set thereafter only if the connection becomes
3023 PH/06 Added the client_condition to authenticators so that some can be skipped
3024 by clients under certain conditions.
3026 PH/07 The error message for a badly-placed control=no_multiline_responses left
3027 "_responses" off the end of the name.
3029 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3031 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3032 (without spaces) instead of just copying the configuration text.
3034 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3036 PH/11 Added $max_received_linelength.
3038 PH/12 Added +ignore_defer and +include_defer to host lists.
3040 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3041 way in which PCRE > 7.0 is built.
3043 PH/14 Implemented queue_only_load_latch.
3045 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3046 MAIL command. The effect was to mangle the value on 64-bit systems.
3048 PH/16 Another patch from the Sieve maintainer.
3050 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3052 PH/18 If a system quota error occurred while trying to create the file for
3053 a maildir delivery, the message "Mailbox is full" was not appended to the
3054 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3055 only to a quota excession during the actual writing of the file.
3057 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3058 characters?) which causes problems in log lines. The DN values are now
3059 passed through string_printing() before being added to log lines.
3061 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3062 and InterBase are left for another time.)
3064 PH/21 Added message_body_newlines option.
3066 PH/22 Guard against possible overflow in moan_check_errorcopy().
3068 PH/23 POSIX allows open() to be a macro; guard against that.
3070 PH/24 If the recipient of an error message contained an @ in the local part
3071 (suitably quoted, of course), incorrect values were put in $domain and
3072 $local_part during the evaluation of errors_copy.
3078 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3079 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3082 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3083 issue a MAIL command.
3085 PH/02 In an ACL statement such as
3087 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3089 if a client was not listed at all, or was listed with a value other than
3090 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3091 the condition was not true (as it should be), so access was not denied.
3092 The bug was that the ! inversion was incorrectly passed on to the second
3093 item. This has been fixed.
3095 PH/03 Added additional dnslists conditions == and =& which are different from
3096 = and & when the dns lookup returns more than one IP address.
3098 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3099 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3101 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3102 FSYNC, which compiles an option called disable_fsync that allows for
3103 bypassing fsync(). The documentation is heavily laced with warnings.
3105 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3107 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3108 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3109 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3110 including adding "make clean"; (3) Added -fPIC when compiling the test
3111 dynamically loaded module, to get rid of a warning.
3113 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3114 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3115 = 0s. The bug is otherwise harmless.
3117 PH/07 There was a bug in the dovecot authenticator such that the value of
3118 $auth1 could be overwritten, and so not correctly preserved, after a
3119 successful authentication. This usually meant that the value preserved by
3120 the server_setid option was incorrect.
3122 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3124 PH/09 Installed PCRE release 7.0.
3126 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3127 run for batched SMTP input. It is now run at the start of every message
3128 in the batch. While fixing this I discovered that the process information
3129 (output by running exiwhat) was not always getting set for -bs and -bS
3130 input. This is fixed, and it now also says "batched" for BSMTP.
3132 PH/11 Added control=no_pipelining.
3134 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3135 patch, slightly modified), and move the expansion of helo_data till after
3136 the connection is made in the smtp transport (so it can use these
3139 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3141 PH/14 Added log_selector = +pid.
3143 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3145 PH/16 Add ${if forany and ${if forall.
3147 PH/17 Added dsn_from option to vary the From: line in DSNs.
3149 PH/18 Flush SMTP output before performing a callout, unless control =
3150 no_callout_flush is set.
3152 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3153 was true (the default) a successful delivery failed to delete the retry
3154 item, thus causing premature timeout of the address. The bug is now
3157 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3159 PH/21 Long custom messages for fakedefer and fakereject are now split up
3160 into multiline responses in the same way that messages for "deny" and
3161 other ACL rejections are.
3163 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3164 with slight modification.
3166 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3167 draft, changing the syntax and factoring some duplicate code".
3169 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3170 for deliveries of the second and subsequent messages over the same SMTP
3173 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3174 ${reduce, with only minor "tidies".
3176 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3178 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3179 expansion side effects.
3181 PH/27 When a message times out after an over-quota error from an Exim-imposed
3182 quota, the bounce message says "mailbox is full". This message was not
3183 being given when it was a system quota that was exceeded. It now should
3186 MH/03 Made $recipients available in local_scan(). local_scan() already has
3187 better access to the recipient list through recipients_list[], but
3188 $recipients can be useful in postmaster-provided expansion strings.
3190 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3191 in the case of a MAIL command with additional options following the
3192 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3193 were accidentally chopped off.
3195 PH/29 SMTP synchronization checks are implemented when a command is read -
3196 there is a check that no more input is waiting when there shouldn't be
3197 any. However, for some commands, a delay in an ACL can mean that it is
3198 some time before the response is written. In this time, more input might
3199 arrive, invalidly. So now there are extra checks after an ACL has run for
3200 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3201 pipelining has not been advertised.
3203 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3205 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3206 returned in the SMTP response when smtp_return_error_details was false.
3207 This has been fixed.
3209 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3210 instead of the C I/O that was originally supplied, because problems were
3211 reported on Solaris.
3213 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3214 Exim which did not show up earlier: it was assuming that a call to
3215 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3216 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3217 was a macro that became an assignment, so it seemed to work. This has
3218 changed to a proper function call with a void return, hence the compile
3219 error. Exim's code has been fixed.
3221 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3224 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3226 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3228 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3229 because it turns out to be too big or there is a timeout) there is no
3230 "Completed" line in the log. When some messages of this type were
3231 selected by exigrep, they were listed as "not completed". Others were
3232 picked up by some special patterns. I have improved the selection
3233 criteria to be more general.
3235 PH/38 The host_find_failed option in the manualroute router can now be set
3236 to "ignore", to completely ignore a host whose IP address cannot be
3237 found. If all hosts are ignored, the behaviour is controlled by the new
3238 host_all_ignored option.
3240 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3241 homing or because of multiple MX records with /mx) generated more than
3242 one IP address, and the following item turned out to be the local host,
3243 all the secondary addresses of the first item were incorrectly removed
3244 from the list, along with the local host and any following hosts (which
3245 is what is supposed to happen).
3247 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3248 whoever called Exim into the -H file. In the case of the daemon it was
3249 behaving confusingly. When first started, it used values for whoever
3250 started the daemon, but after a SIGHUP it used the Exim user (because it
3251 calls itself on a restart). I have changed the code so that it now always
3254 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3255 message are rejected with the same error (e.g. no authentication or bad
3256 sender address), and a DATA command is nevertheless sent (as can happen
3257 with PIPELINING or a stupid MUA), the error message that was given to the
3258 RCPT commands is included in the rejection of the DATA command. This is
3259 intended to be helpful for MUAs that show only the final error to their
3262 PH/42 Another patch from the Sieve maintainer.
3264 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3265 Eximstats - Fixed some broken HTML links and added missing column headers
3267 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3268 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3270 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3272 PH/43 Yet another patch from the Sieve maintainer.
3274 PH/44 I found a way to check for a TCP/IP connection going away before sending
3275 the response to the final '.' that terminates a message, but only in the
3276 case where the client has not sent further data following the '.'
3277 (unfortunately, this is allowed). However, in many cases there won't be
3278 any further data because there won't be any more messages to send. A call
3279 to select() can be used: if it shows that the input is "ready", there is
3280 either input waiting, or the socket has been closed. An attempt to read
3281 the next input character can distinguish the two cases. Previously, Exim
3282 would have sent an OK response which the client would never have see.
3283 This could lead to message repetition. This fix should cure that, at
3284 least in a lot of common cases.
3286 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3287 advertised in response to EHLO.
3293 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3294 fixed by 4.65/MH/01 (is this a record?) are fixed:
3296 (i) An empty string was always treated as zero by the numeric comparison
3297 operators. This behaviour has been restored.
3299 (ii) It is documented that the numeric comparison operators always treat
3300 their arguments as decimal numbers. This was broken in that numbers
3301 starting with 0 were being interpreted as octal.
3303 While fixing these problems I realized that there was another issue that
3304 hadn't been noticed. Values of message_size_limit (both the global option
3305 and the transport option) were treated as octal if they started with 0.
3306 The documentation was vague. These values are now always treated as
3307 decimal, and I will make that clear in the documentation.
3313 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3314 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3317 MH/01 Don't check that the operands of numeric comparison operators are
3318 integers when their expansion is in "skipping" mode (fixes bug
3319 introduced by 4.64-PH/07).
3321 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3322 child addresses, Exim now panics and dies. Previously, because the count
3323 is held in a short int, deliveries were likely to be lost. As such a
3324 large number of recipients for a single message is ridiculous
3325 (performance will be very, very poor), I have chosen to impose a limit
3326 rather than extend the field.
3332 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3333 leftover -K file (the existence of which was triggered by #402).
3334 While we were at it, introduced process PID as part of the -K
3335 filename. This should rule out race conditions when creating
3338 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3339 processing considerably. Previous code took too long for large mails,
3340 triggering a timeout which in turn triggers #401.
3342 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3343 in the DK code in transports.c. sendfile() is not really portable,
3344 hence the _LINUX specificness.
3346 TF/01 In the add_headers option to the mail command in an Exim filter,
3347 there was a bug that Exim would claim a syntax error in any
3348 header after the first one which had an odd number of characters
3351 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3352 callout verification, Exim cached a "reject" for the entire domain. This
3353 is correct for most verifications, but it is not correct for a recipient
3354 verification with use_sender or use_postmaster set, because in that case
3355 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3356 case of MAIL FROM:<> rejection from other early rejections (e.g.
3357 rejection of HELO). When verifying a recipient using a non-null MAIL
3358 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3359 Whatever the result of the callout, the value of the domain cache is
3360 left unchanged (for any other kind of callout, getting as far as trying
3361 RCPT means that the domain itself is ok).
3363 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3366 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3367 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3368 session, the daemon ignores ECONNECT errors and logs others; it now
3369 ignores EPIPE as well.
3371 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3372 (quoted-printable decoding).
3374 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3375 later the small subsequent patch to fix an introduced bug.
3377 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3379 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3381 PH/08 An error is now given if message_size_limit is specified negative.
3383 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3384 to be given (somewhat) arbitrary names.
3386 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3389 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3390 miscellaneous code fixes
3392 PH/10 Added the log_reject_target ACL modifier to specify where to log
3395 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3396 hostname. This is wrong, because it relates to the incoming message (and
3397 probably the interface on which it is arriving) and not to the outgoing
3398 callout (which could be using a different interface). This has been
3399 changed to use the value of the helo_data option from the smtp transport
3400 instead - this is what is used when a message is actually being sent. If
3401 there is no remote transport (possible with a router that sets up host
3402 addresses), $smtp_active_hostname is used.
3404 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3405 tweaks were necessary in order to get it to work (see also 21 below):
3406 (a) The code assumed that strncpy() returns a negative number on buffer
3407 overflow, which isn't the case. Replaced with Exim's string_format()
3409 (b) There were several signed/unsigned issues. I just did the minimum
3410 hacking in of casts. There is scope for a larger refactoring.
3411 (c) The code used strcasecmp() which is not a standard C function.
3412 Replaced with Exim's strcmpic() function.
3413 (d) The code set only $1; it now sets $auth1 as well.
3414 (e) A simple test gave the error "authentication client didn't specify
3415 service in request". It would seem that Dovecot has changed its
3416 interface. Fortunately there's a specification; I followed it and
3417 changed what the client sends and it appears to be working now.
3419 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3422 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3423 address A is aliased to B and C, where B exists and C does not. Without
3424 -v the output is "A verified" because verification stops after a
3425 successful redirection if more than one address is generated. However,
3426 with -v the child addresses are also verified. Exim was outputting "A
3427 failed to verify" and then showing the successful verification for C,
3428 with its parentage. It now outputs "B failed to verify", showing B's
3429 parentage before showing the successful verification of C.
3431 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3432 look up a TXT record in a specific list after matching in a combined
3435 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3436 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3437 they consult the DNS. I had assumed they would set it the way they
3438 wanted; and indeed my experiments on Linux seem to show that in some
3439 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3440 To be on the safe side, however, I have now made the interface to
3441 host_find_byname() similar to host_find_bydns(), with an argument
3442 containing the DNS resolver options. The host_find_byname() function now
3443 sets these options at its start, just as host_find_bydns() does. The smtp
3444 transport options dns_qualify_single and dns_search_parents are passed to
3445 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3446 of host_find_byname() use the default settings of RES_DEFNAMES
3447 (qualify_single) but not RES_DNSRCH (search_parents).
3449 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3450 spool_read_header() do less string testing, by means of a preliminary
3451 switch on the second character of optional "-foo" lines. (This is
3452 overdue, caused by the large number of possibilities that now exist.
3453 Originally there were few.) While I was there, I also converted the
3454 str(n)cmp tests so they don't re-test the leading "-" and the first
3455 character, in the hope this might squeeze out yet more improvement.
3457 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3458 flag allowing group syntax was set by the header_syntax check but not
3459 turned off, possible causing trouble later; (2) The flag was not being
3460 set at all for the header_verify test, causing "group"-style headers to
3461 be rejected. I have now set it in this case, and also caused header_
3462 verify to ignore an empty address taken from a group. While doing this, I
3463 came across some other cases where the code for allowing group syntax
3464 while scanning a header line wasn't quite right (mostly, not resetting
3465 the flag correctly in the right place). These bugs could have caused
3466 trouble for malformed header lines. I hope it is now all correct.
3468 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3469 with the "reply" argument non-NULL. The code, however (which originally
3470 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3471 but it didn't always do it. This confused somebody who was copying the
3472 code for some other use. I have removed all the tests.
3474 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3475 feature that was used to support insecure browsers during the U.S. crypto
3476 embargo. It requires special client support, and Exim is probably the
3477 only MTA that supported it -- and would never use it because real RSA is
3478 always available. This code has been removed, because it had the bad
3479 effect of slowing Exim down by computing (never used) parameters for the
3480 RSA_EXPORT functionality.
3482 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3483 authenticator to fail if there's a tab character in the incoming data
3484 (there should never be unless someone is messing about, as it's supposed
3485 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3486 if the connection is using TLS or if the remote IP is the same as the
3487 local IP, and the "valid-client-cert option" if a client certificate has
3490 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3491 authenticators. This can be used for authorization after authentication
3492 succeeds. (In the case of plaintext, it servers for both authentication
3495 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3496 if any retry times were supplied.
3498 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3499 connection, where there is no client IP address to check. In this
3500 situation, the verify now always succeeds.
3502 PH/25 Applied John Jetmore's -Mset patch.
3504 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3506 PH/27 In a string expansion for a processed (not raw) header when multiple
3507 headers of the same name were present, leading whitespace was being
3508 removed from all of them, but trailing whitespace was being removed only
3509 from the last one. Now trailing whitespace is removed from each header
3510 before concatenation. Completely empty headers in a concatenation (as
3511 before) are ignored.
3513 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3514 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3516 PH/29 [Removed. This was a change that I later backed out, and forgot to
3517 correct the ChangeLog entry (that I had efficiently created) before
3518 committing the later change.]
3520 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3521 address errors (4xx response to RCPT) over the same connection as other
3522 messages routed to the same hosts. Such deliveries are always "forced",
3523 so retry times are not inspected. This resulted in far too many retries
3524 for the affected addresses. The effect occurred only when there were more
3525 hosts than the hosts_max_try setting in the smtp transport when it had
3526 the 4xx errors. Those hosts that it had tried were not added to the list
3527 of hosts for which the message was waiting, so if all were tried, there
3528 was no problem. Two fixes have been applied:
3530 (i) If there are any address or message errors in an SMTP delivery, none
3531 of the hosts (tried or untried) are now added to the list of hosts
3532 for which the message is waiting, so the message should not be a
3533 candidate for sending over the same connection that was used for a
3534 successful delivery of some other message. This seems entirely
3535 reasonable: after all the message is NOT "waiting for some host".
3536 This is so "obvious" that I'm not sure why it wasn't done
3537 previously. Hope I haven't missed anything, but it can't do any
3538 harm, as the worst effect is to miss an optimization.
3540 (ii) If, despite (i), such a delivery is accidentally attempted, the
3541 routing retry time is respected, so at least it doesn't keep
3542 hammering the server.
3544 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3545 in ${readsocket because some servers need this prod.
3547 PH/32 Added some extra debug output when updating a wait-xxx database.
3549 PH/33 The hint "could be header name not terminated by colon", which has been
3550 given for certain expansion errors for a long time, was not being given
3551 for the ${if def:h_colon_omitted{... case.
3553 PH/34 The spec says: "With one important exception, whenever a domain list is
3554 being scanned, $domain contains the subject domain." There was at least
3555 one case where this was not true.
3557 PH/35 The error "getsockname() failed: connection reset by peer" was being
3558 written to the panic log as well as the main log, but it isn't really
3559 panic-worthy as it just means the connection died rather early on. I have
3560 removed the panic log writing for the ECONNRESET error when getsockname()
3563 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3564 runs only) independently of the message's sender address. This meant
3565 that, if the 4xx error was in fact related to the sender, a different
3566 message to the same recipient with a different sender could confuse
3567 things. In particular, this can happen when sending to a greylisting
3568 server, but other circumstances could also provoke similar problems.
3569 I have changed the default so that the retry time for these errors is now
3570 based a combination of the sender and recipient addresses. This change
3571 can be overridden by setting address_retry_include_sender=false in the
3574 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3575 remote server are returned as part of bounce messages. This was not
3576 happening for LMTP over a pipe (the lmtp transport), but now it is the
3577 same for both kinds of LMTP.
3579 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3580 in header lines that were in fact CNAMEs. This is no longer the case.
3582 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3583 and queue runs started by the daemon processed all messages. This has
3584 been fixed so that -R and -S can now usefully be given with -q<time>.
3586 PH/40 Import PCRE release 6.7 (fixes some bugs).
3588 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3590 PH/42 Give an error if -q is specified more than once.
3592 PH/43 Renamed the variables $interface_address and $interface_port as
3593 $received_ip_address and $received_port, to make it clear that these
3594 values apply to message reception, and not to the outgoing interface when
3595 a message is delivered. (The old names remain recognized, of course.)
3597 PH/44 There was no timeout on the connect() call when using a Unix domain
3598 socket in the ${readsocket expansion. There now is.
3600 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3601 be meaningful with "accept".
3603 SC/01 Eximstats V1.43
3604 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3606 SC/02 Eximstats V1.44
3607 Use a glob alias rather than an array ref in the generated
3608 parser. This improves both readability and performance.
3610 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3611 Collect SpamAssassin and rejection statistics.
3612 Don't display local sender or destination tables unless
3613 there is data to show.
3614 Added average volumes into the top table text output.
3616 SC/04 Eximstats V1.46
3617 Collect data on the number of addresses (recipients)
3618 as well as the number of messages.
3620 SC/05 Eximstats V1.47
3621 Added 'Message too big' to the list of mail rejection
3622 reasons (thanks to Marco Gaiarin).
3624 SC/06 Eximstats V1.48
3625 Mainlog lines which have GMT offsets and are too short to
3626 have a flag are now skipped.
3628 SC/07 Eximstats V1.49 (Alain Williams)
3629 Added the -emptyok flag.
3631 SC/08 Eximstats V1.50
3632 Fixes for obtaining the IP address from reject messages.
3634 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3635 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3636 whitespace changes from 4.64-PH/27
3638 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3641 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3642 are found, allow negative numbers in numeric criteria)
3644 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3646 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3647 to match changes made in 4.64-PH/43
3649 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3651 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3652 "domain" is actually an IP address, and force a failure. This locks out
3653 those revolvers/nameservers that support "A-for-A" lookups, in
3654 contravention of the specifications.
3656 PH/48 When a host name was looked up from an IP address, and the subsequent
3657 forward lookup of the name timed out, the host name was left in
3658 $sender_host_name, contrary to the specification.
3660 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3661 restricted to single-key lookups, Exim was not diagnosing an error if
3662 * or *@ was used with a query-style lookup.
3664 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3666 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3667 long ago, but noone interested enough thought of it. Let's just say that
3668 the "1.1" means that there are some new functions that weren't there at
3669 some point in the past.
3671 PH/51 Error processing for expansion failure of helo_data from an smtp
3672 transport during callout processing was broken.
3674 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3675 tested/used via the -bh/-bhc/-bs options.
3677 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3678 bug, fixed in subsequent PCRE releases).
3680 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3681 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3683 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3689 SC/01 Use a glob alias rather than an array ref in eximstats generated
3690 parser. This improves both readability and performance.
3692 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3693 Don't display local sender or destination tables in eximstats unless
3694 there is data to show.
3695 Added average volumes into the eximstats top table text output.
3697 SC/03 Collect data on the number of addresses (recipients) as well
3698 as the number of messages in eximstats.
3700 TF/01 Correct an error in the documentation for the redirect router. Exim
3701 does (usually) call initgroups() when daemonizing.
3703 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3704 with consistent privilege compared to when running as a daemon.
3706 TF/03 Note in the spec that $authenticated_id is not set for local
3707 submissions from trusted users.
3709 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3710 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3712 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3713 by adding some example configuration directives to the default
3714 configuration file. A little bit of work is required to uncomment the
3715 directives and define how usernames and passwords are checked, but
3716 there is now a framework to start from.
3718 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3719 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3720 without this. I don't know how relevant this is to other LDAP libraries.
3722 PH/02 Add the verb name to the "unknown ACL verb" error.
3724 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3726 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3728 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3729 directory not expanded when it should be if an expanded home directory
3730 was set for the address (which is overridden by the transport).
3732 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3735 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3736 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3737 because it is too late at that time, and has no effect.
3739 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3740 security issue with \' (bugzilla #107). I could not use the
3741 PQescapeStringConn() function, because it needs a PGconn value as one of
3744 PH/08 When testing addresses using -bt, indicate those final addresses that
3745 are duplicates that would not cause an additional delivery. At least one
3746 person was confused, thinking that -bt output corresponded to deliveries.
3747 (Suppressing duplicates isn't a good idea as you lose the information
3748 about possibly different redirections that led to the duplicates.)
3750 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3751 systems where poll() doesn't work, in particular OS X.
3753 PH/10 Added more information to debugging output for retry time not reached.
3755 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3756 operations in malware.c.
3758 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3761 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3762 syslog_duplication set false, log lines that would normally be written
3763 both the the main log and to the reject log were not written to syslog at
3766 PH/14 In the default configuration, change the use of "message" in ACL warn
3767 statements to "add_header".
3769 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3770 not followed by a command (e.g. "seen endif").
3772 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3773 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3776 PH/17 Added extra conditions to the default value of delay_warning_condition
3780 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3781 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3782 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3785 The Auto-Submitted: and various List- headers are standardised, whereas I
3786 don't think Precedence: ever was.
3788 PH/18 Refactored debugging code in route_finduser() to show more information,
3789 in particular, the error code if getpwnam() issues one.
3791 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3792 This is apparently needed in addition to the PH/07 change above to avoid
3793 any possible encoding problems.
3795 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3796 but not after initializing Perl.
3798 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3799 output them only if debugging. By default they are written stderr,
3800 apparently, which is not desirable.
3802 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3805 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3808 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3810 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3811 authenticated or an ident call has been made. Suppress the default
3812 values for $authenticated_id and $authenticated_sender (but permit -oMai
3813 and -oMas) when testing with -bh.
3815 PH/24 Re-jigged the order of the tests in the default configuration so that the
3816 tests for valid domains and recipients precede the DNS black list and CSA
3817 tests, on the grounds that those ones are more expensive.
3819 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3820 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3821 This bug exists in every version of Exim that I still have, right back to
3824 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3825 However, an attempt to turn on case-sensitivity in a regex key by
3826 including (?-i) didn't work because the subject string was already
3827 lowercased, and the effects were non-intuitive. It turns out that a
3828 one-line patch can be used to allow (?-i) to work as expected.
3834 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3835 other effects) broke the use of negated acl sub-conditions.
3837 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3840 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3841 "Deny" causes Exim to reject the incoming connection with a 554 error.
3842 Unfortunately, if there is a major crisis, such as a disk failure,
3843 tcp-wrappers gives "deny", whereas what one would like would be some
3844 kind of temporary error. A kludge has been added to help with this.
3845 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3846 554 error is used if errno is still zero or contains ENOENT (which occurs
3847 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3850 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3852 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3853 errors. Otherwise a message that provokes a temporary error (when other
3854 messages do not) can cause a whole host to time out.
3856 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3857 addresses were routed directly to files or pipes from a redirect router.
3858 File deliveries just didn't batch; pipe deliveries might have suffered
3861 PH/06 A failure to get a lock for a hints database would erroneously always say
3862 "Failed to get write lock", even when it was really a read lock.
3864 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3865 of 0600. This has been changed to use the value of the lockfile_mode
3866 option (which defaults to 0600).
3868 PH/08 Applied small patch from the Sieve maintainer.
3870 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3871 folder from quota calculations, a direct delivery into this folder messed
3872 up the contents of the maildirsize file. This was because the regex was
3873 used only to exclude .Trash (or whatever) when the size of the mailbox
3874 was calculated. There was no check that a delivery was happening into an
3875 excluded directory. This bug has been fixed by ignoring all quota
3876 processing for deliveries into excluded directories.
3878 PH/10 Added the maildirfolder_create_regex option to appendfile.
3884 PH/01 The code for finding all the local interface addresses on a FreeBSD
3885 system running IPv6 was broken. This may well have applied to all BSD
3886 systems, as well as to others that have similar system calls. The broken
3887 code found IPv4 interfaces correctly, but gave incorrect values for the
3888 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3889 that it would not match correctly against @[] and not recognize the IPv6
3892 PH/02 The ipliteral router was not recognizing addresses of the form user@
3893 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3895 PH/03 Added disable_ipv6.
3897 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3898 decoded form, because it is most often used to construct To: headers
3899 lines in autoreplies, and the decoded form may well be syntactically
3900 invalid. However, $reply_address has leading white space removed, and all
3901 newlines turned into spaces so that the autoreply transport does not
3904 PH/05 If group was specified without a user on a router, and no group or user
3905 was specified on a transport, the group from the router was ignored.
3907 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3908 for visible compile-time settings that can be used to change these
3909 numbers, for those that want even more. Backwards compatibility with old
3910 spool files has been maintained. However, going back to a previous Exim
3911 release will lost any variables that are in spool files.
3913 PH/07 Two small changes when running in the test harness: increase delay when
3914 passing a TCP/IP connection to a new process, in case the original
3915 process has to generate a bounce, and remove special handling of
3916 127.0.0.2 (sic), which is no longer necessary.
3918 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3919 be the same on different OS.
3921 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3924 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3925 whether --show-vars was specified or not
3927 JJ/02 exipick: Added support for new ACL variable spool format introduced
3930 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3931 syntactically invalid From: or Reply-to: line, and a filter used this to
3932 generate an autoreply, and therefore failed to obtain an address for the
3933 autoreply, Exim could try to deliver to a non-existent relative file
3934 name, causing unrelated and misleading errors. What now happens is that
3935 it logs this as a hard delivery error, but does not attempt to create a
3938 PH/11 The exinext utility has a -C option for testing purposes, but although
3939 the given file was scanned by exinext itself; it wasn't being passed on
3940 when Exim was called.
3942 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3943 an end-of-file indication when reading a command response.
3945 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3946 compiled. In many other places in Exim, IPv6 addresses are always
3947 recognized, so I have changed this. It also means that IPv4 domain
3948 literals of the form [IPV4:n.n.n.n] are now always recognized.
3950 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3951 used if the router is not running as root, for example, when verifying at
3952 ACL time, or when using -bh. The debugging output from this situation was
3953 non-existent - all you got was a failure to exec. I have made two
3956 (a) Failures to set uid/gid, the current directory, or a process leader
3957 in a subprocess such as that created by queryprogram now generate
3958 suitable debugging output when -d is set.
3960 (b) The queryprogram router detects when it is not running as root,
3961 outputs suitable debugging information if -d is set, and then runs
3962 the subprocess without attempting to change uid/gid.
3964 PH/15 Minor change to Makefile for building test_host (undocumented testing
3967 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3968 additional section of a DNS packet that returns MX or SRV records.
3969 Instead, it always explicitly searches for A/AAAA records. This avoids
3970 major problems that occur when a DNS server includes only records of one
3971 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3972 fixed another bug: if SRV records were looked up and the corresponding
3973 address records were *not* found in the additional section, the port
3974 values from the SRV records were lost.
3976 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3977 using the correct key (the original address) when searching the retry
3978 rules in order to find which one to use for generating the retry hint.
3980 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3981 adding the default one. Similarly, if it contains a Reply-To: header, the
3982 errors_reply_to option, if set, is not used.
3984 PH/19 When calculating a retry time, Exim used to measure the "time since
3985 failure" by looking at the "first failed" field in the retry record. Now
3986 it does not use this if it is later than than the arrival time of the
3987 message. Instead it uses the arrival time. This makes for better
3988 behaviour in cases where some deliveries succeed, thus re-setting the
3989 "first failed" field. An example is a quota failure for a huge message
3990 when small messages continue to be delivered. Without this change, the
3991 "time since failure" will always be short, possible causing more frequent
3992 delivery attempts for the huge message than are intended.
3993 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3995 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3996 $1, $2, $3) because the numerical variables can be reset during some
3997 expansion items (e.g. "match"), thereby losing the authentication data.
3999 PH/21 Make -bV show the size of off_t variables so that the test suite can
4000 decide whether to run tests for quotas > 2G.
4002 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4003 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4004 filecount value is greater than 2G or if a quota value is greater than 2G
4005 on a system where the size of off_t is not greater than 4, a panic error
4008 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4009 never match. The debug and -bh output now contains an explicit error
4010 message indicating a malformed IPv4 address or mask.
4012 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4013 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4014 PH/23 above applies.
4016 PH/25 Do not write to syslog when running in the test harness. The only
4017 occasion when this arises is a failure to open the main or panic logs
4018 (for which there is an explicit test).
4020 PH/26 Added the /no_tell option to "control=freeze".
4022 PH/27 If a host name lookup failed very early in a connection, for example, if
4023 the IP address matched host_lookup and the reverse lookup yielded a name
4024 that did not have a forward lookup, an error message of the form "no IP
4025 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4026 could be logged. Now it outputs the IP address instead of "NULL".
4028 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4029 allows the sender and the authenticated sender to be set when
4030 submitting a message from within Exim. Since child_open_exim() is
4031 documented for local_scan(), the new function should be too.
4033 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4034 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4035 results in an empty string is now treated as unset.
4037 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4039 PH/31 Added sender_verify_fail logging option.
4041 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4042 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4043 tidied the source and removed it altogether.
4045 PH/33 When a queue run was abandoned because the load average was too high, a
4046 log line was always written; now it is written only if the queue_run log
4047 selector is set. In addition, the log line for abandonment now contains
4048 information about the queue run such as the pid. This is always present
4049 in "start" and "stop" lines but was omitted from the "abandon" line.
4051 PH/34 Omit spaces between a header name and the colon in the error message that
4052 is given when verify = headers_syntax fails (if there are lots of them,
4053 the message gets confusing).
4055 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4056 names, as there are now some PTR records that contain slashes. This check
4057 is only to protect against broken name servers that fall over on strange
4058 characters, so the fact that it applies to all lookups doesn't matter.
4060 PH/36 Now that the new test suite is complete, we can remove some of the
4061 special code in Exim that was needed for the old test suite. For example,
4062 sorting DNS records because real resolvers return them in an arbitrary
4063 order. The new test suite's fake resolver always returns records in the
4066 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4067 bounces) except when queue_only is set, to avoid logging races between
4068 the different processes.
4070 PH/38 Panic-die if .include specifies a non-absolute path.
4072 PH/39 A tweak to the "H" retry rule from its user.
4074 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4075 a label. They prevented compilation on older perls.
4077 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4078 a warning to be raised on newish perls.
4080 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4081 on queue. Changes to match documented behaviour of showing count of
4082 messages matching specified criteria.
4084 PH/40 Changed the default ident timeout from 30s to 5s.
4086 PH/41 Added support for the use of login_cap features, on those BSD systems
4087 that have them, for controlling the resources used by pipe deliveries.
4089 PH/42 The content-scanning code uses fopen() to create files in which to put
4090 message data. Previously it was not paying any attention to the mode of
4091 the files. Exim runs with umask(0) because the rest of the code creates
4092 files with open(), and sets the required mode explicitly. Thus, these
4093 files were ending up world-writeable. This was not a big issue, because,
4094 being within the spool directory, they were not world-accessible. I have
4095 created a function called modefopen, which takes an additional mode
4096 argument. It sets umask(777), creates the file, chmods it to the required
4097 mode, then resets the umask. All the relevant calls to fopen() in the
4098 content scanning code have been changed to use this function.
4100 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4101 to 24 hours. This avoids potential overflow problems when processing G
4102 and H retry rules. I suspect nobody ever tinkers with this value.
4104 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4106 PH/45 When the plaintext authenticator is running as a client, the server's
4107 challenges are checked to ensure they are valid base64 strings. By
4108 default, the authentication attempt is cancelled if an invalid string is
4109 received. Setting client_ignore_invalid_base64 true ignores these errors.
4110 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4111 they are received. Thus, the responses can be made to depend on the
4112 challenges. If an invalid string is ignored, an empty string is placed in
4115 PH/46 Messages that are created by the autoreply transport now contains a
4116 References: header, in accordance with RFCs 2822 and 3834.
4118 PH/47 Added authenticated_sender_force to the smtp transport.
4120 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4122 PH/49 Installed latest patch from the Sieve maintainer.
4124 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4125 was also set, the appendfile transport was unnecessarily scanning a
4126 directory of message files (e.g. for maildir delivery) to find the count
4127 of files (along with the size), even though it did not need this
4128 information. It now does the scan only if it needs to find either the
4129 size of the count of files.
4131 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4133 PH/52 Two bugs concerned with error handling when the smtp transport is
4136 (i) Exim was not creating retry information for temporary errors given
4137 for individual recipients after the DATA command when the smtp transport
4138 was used in LMTP mode. This meant that they could be retried too
4139 frequently, and not timed out correctly.
4141 (ii) Exim was setting the flag that allows error details to be returned
4142 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4143 recipients that were returned after the DATA command.
4145 PH/53 This is related to PH/52, but is more general: for any failing address,
4146 when detailed error information was permitted to be returned to the
4147 sender, but the error was temporary, then after the final timeout, only
4148 "retry timeout exceeded" was returned. Now it returns the full error as
4149 well as "retry timeout exceeded".
4151 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4152 do this, and (what is worse) MTAs that accept it.
4154 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4155 will now be deprecated.
4157 PH/56 New os.c-cygwin from the Cygwin maintainer.
4159 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4160 formats (previously only available in exim formats via -bpr, -bpru,
4161 and -bpra. Now also available in native and exiqgrep formats)
4163 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4164 with very large, slow to parse queues
4166 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4168 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4170 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4171 responses to authentication challenges, though it was showing the
4172 challenges; (ii) I've removed the CR characters from the debug output for
4175 PH/58 Allow for the insertion of a newline as well as a space when a string
4176 is turned into more than one encoded-word during RFC 2047 encoding. The
4177 Sieve code now uses this.
4179 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4180 data_4xx, lost_connection, tls_required.
4182 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4183 message was being sent as an SMTP response.
4185 PH/61 Add -l and -k options to exicyclog.
4187 PH/62 When verifying, if an address was redirected to one new address, so that
4188 verification continued, and the new address failed or deferred after
4189 having set something in $address_data, the value of $address_data was not
4190 passed back to the ACL. This was different to the case when no
4191 redirection occurred. The value is now passed back in both cases.
4193 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4194 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4195 use login_cap.h, so on its own it isn't the distinguishing feature. The
4196 new name refers directly to the setclassresources() function.
4198 PH/65 Added configuration files for NetBSD3.
4200 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4202 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4203 is preferred over IPv4.
4205 PH/68 The bounce_return_message and bounce_return_body options were not being
4206 honoured for bounces generated during the reception of non-SMTP messages.
4207 In particular, this applied to messages rejected by the ACL. This bug has
4208 been fixed. However, if bounce_return_message is true and bounce_return_
4209 body is false, the headers that are returned for a non-SMTP message
4210 include only those that have been read before the error was detected.
4211 (In the case of an ACL rejection, they have all been read.)
4213 PH/69 The HTML version of the specification is now built in a directory called
4214 spec_html instead of spec.html, because the latter looks like a path with
4215 a MIME-type, and this confuses some software.
4217 PH/70 Catch two compiler warnings in sieve.c.
4219 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4220 function verify_get_ident() calls ip_connect() to connect a socket, but
4221 if the "connect()" function timed out, ip_connect() used to close the
4222 socket. However, verify_get_ident() also closes the socket later, and in
4223 between Exim writes to the log, which may get opened at this point. When
4224 the socket was closed in ip_connect(), the log could get the same file
4225 descriptor number as the socket. This naturally causes chaos. The fix is
4226 not to close the socket in ip_connect(); the socket should be closed by
4227 the function that creates it. There was only one place in the code where
4228 this was missing, in the iplookup router, which I don't think anybody now
4229 uses, but I've fixed it anyway.
4231 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4232 well as to direct DNS lookups. Otherwise the handling of names in host
4233 lists is inconsistent and therefore confusing.
4239 PH/01 Two changes to the default runtime configuration:
4241 (1) Move the checks for relay_from_hosts and authenticated clients from
4242 after to before the (commented out) DNS black list checks.
4244 (2) Add control=submission to the relay_from_hosts and authenticated
4245 clients checks, on the grounds that messages accepted by these
4246 statements are most likely to be submissions.
4248 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4250 (1) Generate an error if the third argument for the ${prvs expansion is
4253 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4256 (3) Reset the variables that are obtained from the first argument of
4257 ${prvscheck and used in the second argument before leaving the code,
4258 because their memory is reclaimed, so using them afterwards may do
4261 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4262 one (it's much easier than Tom thought :-).
4264 (5) Because of (4), we can now allow for the use of $prvscheck_result
4265 inside the third argument.
4267 PH/03 For some reason, the default setting of PATH when running a command from
4268 a pipe transport was just "/usr/bin". I have changed it to
4271 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4272 anything to be listed in the output from -bV.
4274 PH/05 When a filter generated an autoreply, the entire To: header line was
4275 quoted in the delivery log line, like this:
4277 => >A.N.Other <ano@some.domain> <original@ddress> ...
4279 This has been changed so that it extracts the operative address. There
4280 may be more than one such address. If so, they are comma-separated, like
4283 => >ano@some.domain,ona@other.domain <original@ddress> ...
4285 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4286 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4287 not being looked up in the rDNS to get a host name, Exim was showing the
4288 IP address twice in Received: lines, even though the IP addresses were
4289 identical. For example:
4291 Received: from [1.2.3.4] (helo=[1.2.3.4])
4293 However, if the real host name was known, it was omitting the HELO data
4294 if it matched the actual IP address. This has been tidied up so that it
4295 doesn't show the same IP address twice.
4297 PH/07 When both +timestamp and +memory debugging was on, the value given by
4298 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4299 called by the debug printing, thereby overwriting the timestamp buffer.
4300 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4302 PH/08 When the original message was included in an autoreply transport, it
4303 always said "this is a copy of the message, including all the headers",
4304 even if body_only or headers_only was set. It now gives an appropriate
4307 PH/09 Applied a patch from the Sieve maintainer which:
4309 o fixes some comments
4310 o adds the (disabled) notify extension core
4311 o adds some debug output for the result of if/elsif tests
4312 o points to the current vacation draft in the documentation
4313 and documents the missing references header update
4317 o fixes a bug in processing the envelope test (when testing
4318 multiple envelope elements, the last element determined the
4321 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4322 Electronic Mail") by including:
4324 Auto-submitted: auto-generated
4326 in the messages that it generates (bounce messages and others, such as
4327 warnings). In the case of bounce messages for non-SMTP messages, there was
4328 also a typo: it was using "Auto_submitted" (underscore instead of
4329 hyphen). Since every message generated by Exim is necessarily in response
4330 to another message, thes have all been changed to:
4332 Auto-Submitted: auto-replied
4334 in accordance with these statements in the RFC:
4336 The auto-replied keyword:
4338 - SHOULD be used on messages sent in direct response to another
4339 message by an automatic process,
4341 - MUST NOT be used on manually-generated messages,
4343 - MAY be used on Delivery Status Notifications (DSNs) and Message
4344 Disposition Notifications (MDNs),
4346 - MUST NOT be used on messages generated by automatic or periodic
4347 processes, except for messages which are automatic responses to
4350 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4351 to the default Received: header definition.
4353 PH/12 Added log selector acl_warn_skipped (default on).
4355 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4356 variables because (a) they are in the wrong storage pool and (b) even if
4357 they were copied, it wouldn't work properly because of the caching.
4359 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4360 checking when decoding. Apparently there are clients that generate
4361 overlong encoded strings. Why am I not surprised?
4363 PH/15 If the first argument of "${if match_address" was not empty, but did not
4364 contain an "@" character, Exim crashed. Now it writes a panic log message
4365 and treats the condition as false.
4367 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4369 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4370 extension "envelope-auth". The code is finished and in agreement with
4371 other implementations, but there is no documentation so far and in fact,
4372 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4373 not changing the active code.
4375 Print executed "if" and "elsif" statements when debugging is used. This
4376 helps a great deal to understand what a filter does.
4378 Document more things not specified clearly in RFC3028. I had all this
4379 sorted out, when out of a sudden new issues came to my mind. Oops."
4381 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4384 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4385 canonical form (as documented). However, after a host name lookup from
4386 the IP address, check_host() was doing a simple string comparison with
4387 addresses acquired from the DNS when checking that the found name did
4388 have the original IP as one of its addresses. Since any found IPv6
4389 addresses are likely to be in abbreviated form, the comparison could
4390 fail. Luckily, there already exists a function for doing the comparison
4391 by converting both addresses to binary, so now that is used instead of
4392 the text comparison.
4394 PH/20 There was another similar case to PH/19, when a complete host name was
4395 given in a host list; looking up its IP address could give an abbreviated
4396 form, whereas the current host's name might or might not be abbreviated.
4397 The same fix has been applied.
4403 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4404 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4407 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4408 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4410 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4412 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4413 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4414 Also, for "Auto-Submitted", treat anything other than "no" as
4415 non-personal, in accordance with RFC 3834. (Previously it treated
4416 anything starting "auto-" as non-personal.)
4418 TF/01 The control=submission/name=... option had a problem with syntax
4419 errors if the name included a slash character. The /name= option
4420 now slurps the rest of the string, so it can include any characters
4421 but it must come last in the list of options (after /sender_retain
4424 PH/05 Some modifications to the interface to the fake nameserver for the new
4432 TK/01 Added the "success_on_redirect" address verification option. See
4433 NewStuff for rationale and an example.
4435 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4437 PH/02 Patch to exigrep to allow it to work on syslog lines.
4439 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4440 fread() to skip over the body file's header line, because in Cygwin the
4441 header line is locked and is inaccessible.
4443 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4444 co-exist for some time) to make it clear that it is the Exim ID that is
4445 referenced, not the Message-ID: header line.
4447 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4448 string_format() function, because snprintf() does not exist on all
4451 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4452 ${stat: expansion item.
4454 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4455 protocol synchronization error", to keep the pedants happy.
4457 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4458 well as for IRIX systems, when gcc is being used. See the host.c source
4461 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4463 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4466 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4467 transport and to the smtp transport in LMTP mode.
4469 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4471 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4472 run a filter in a subprocess. This could lead to confusion in subsequent
4473 lookups in the parent process. There should also be a search_tidyup() at
4474 the end of the subprocess.
4476 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4477 only if the host matched helo_try_verify_hosts, which caused the
4478 verification to occur when the EHLO/HELO command was issued. The ACL just
4479 tested the remembered result. Now, if a previous verification attempt has
4480 not happened, "verify = helo" does it there and then.
4482 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4484 TK/03 Fix log output including CR from clamd.
4486 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4487 exist provoked a memory error which could cause a segfault.
4489 PH/15 Installed PCRE 6.2
4491 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4493 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4494 of the problem. Specifically, suggested +O2 rather than +O1 for the
4497 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4499 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4500 record, the port was not correctly logged when the outgoing_port log
4501 selector was set (it logged the transort's default port).
4503 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4504 fallback_hosts, and "hosts" in the smtp transport.
4506 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4507 host errors such as "Connection refused".
4509 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4510 authentication with radiusclient 0.4.9:
4512 - Error returned from rc_read_config was caught wrongly
4513 - Username/password not passed on to radius server due to wrong length.
4515 The presumption is that some radiusclient API changes for 4.51/PH/17
4516 were not taken care of correctly. The code is still untested by me (my
4517 Linux distribution still has 0.3.2 of radiusclient), but it was
4518 contributed by a Radius user.
4520 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4521 expanding the "port" option of the smtp transport.
4523 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4524 while reading a MIME header. Thanks to Tom Hughes for a patch.
4526 PH/24 Include config.h inside local_scan.h so that configuration settings are
4529 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4530 that in an ACL for RCPT (for example), you can examine exactly what was
4533 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4534 commands, but it was not correctly comparing the address with the actual
4535 client host address. Thus, it would show the EHLO address in Received:
4536 header lines when this was not necessary.
4538 PH/27 Added the % operator to ${eval:}.
4540 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4541 it should be ignoring failures (because with -C, for example, it has lost
4542 privilege). It wasn't ignoring creation failures other than "already
4545 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4548 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4549 because an input line was too long, either on its own, or by virtue of
4550 too many continuations, the temporary file was not being removed, and the
4551 return code was incorrect.
4553 PH/31 Missing "BOOL" in function definition in filtertest.c.
4555 PH/32 Applied Sieve patches from the maintainer.
4557 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4559 PH/33 Added "verify = not_blind".
4561 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4562 Local/Makefile (with some defaults set). These are used in built scripts
4563 such as exicyclog, but they have never been used in the exim_install
4564 script (though there are many overriding facilities there). I have
4565 arranged that the exim_install script now takes note of these two
4568 PH/35 Installed configuration files for Dragonfly.
4570 PH/36 When a locally submitted message by a trusted user did not contain a
4571 From: header, and the sender address was obtained from -f or from an SMTP
4572 MAIL command, and the trusted user did not use -F to supply a sender
4573 name, $originator_name was incorrectly used when constructing a From:
4574 header. Furthermore, $originator_name was used for submission mode
4575 messages from external hosts without From: headers in a similar way,
4576 which is clearly wrong.
4578 PH/37 Added control=suppress_local_fixups.
4580 PH/38 When log_selector = +received_sender was set, and the addition of the
4581 sender made the log line's construction buffer exactly full, or one byte
4582 less than full, an overflow happened when the terminating "\n" was
4585 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4586 when the result of a list match is failure because a DNS lookup failed.
4588 PH/40 RM_COMMAND is now used in the building process.
4590 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4591 the "build-* directories that it finds.
4593 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4594 address in a domain literal was a prefix of an interface address.
4596 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4597 when verifying a sender address, unless rewrite_headers is false.
4599 PH/44 Wrote a long comment about why errors_to addresses are verified as
4600 recipients, not senders.
4602 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4603 the ratelimit ACL was added.
4605 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4607 PH/46 Added extra information about PostgreSQL errors to the error string.
4609 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4610 avoiding the need to install special zones in a real server. This is
4611 backwards compatible; if it can't find the fake resolver, it drops back.
4612 Thus, both old and new test suites can be run.
4614 TF/02 Added util/ratelimit.pl
4616 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4617 clock is set back in time.
4619 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4620 Candler <B.Candler@pobox.com>.
4622 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4623 OK for addresses that are the result of redirections.
4625 PH/48 A number of further additions for the benefit of the new test suite,
4626 including a fake gethostbyname() that interfaces to the fake DNS resolver
4629 TF/06 The fix for widen_domains has also been applied to qualify_single and
4630 search_parents which are the other dnslookup options that can cause
4633 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4636 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4638 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4639 service" if it encountered an MX record with an empty target hostname.
4640 The message is now "an MX or SRV record indicated no SMTP service".
4642 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4643 if the DNS of the sending site is misconfigured. This is quite a
4644 common situation. This change restores the behaviour of treating a
4645 helo verification defer as a failure.
4647 PH/51 If self=fail was set on a router, the bounce message did not include the
4648 actual error message.
4654 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4656 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4657 command itself ended in error, the underlying message about the transport
4658 filter timeout was being overwritten with the pipe command error. Now the
4659 underlying error message should be appended to the second error message.
4661 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4663 PH/02 Reduce the amount of output that "make" produces by default. Full output
4664 can still be requested.
4666 PH/03 The warning log line about a condition test deferring for a "warn" verb
4667 was being output only once per connection, rather than after each
4668 occurrence (because it was using the same function as for successful
4669 "warn" verbs). This seems wrong, so I have changed it.
4671 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4672 it should not have, which might have caused a crash in the right
4673 circumstances, but probably never did.
4675 PH/04 Installed a modified version of Tony Finch's patch to make submission
4676 mode fix the return path as well as the Sender: header line, and to
4677 add a /name= option so that you can make the user's friendly name appear
4680 TF/03 Added the control = fakedefer ACL modifier.
4682 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4683 Mark Lowes for thorough testing.
4685 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4687 TK/03 Merged latest SRS patch from Miles Wilton.
4689 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4690 with the definition in sysexits.h (which is #included earlier).
4691 Fortunately, Exim does not actually use EX_OK. The code used to try to
4692 preserve the sysexits.h value, by assuming that macro definitions were
4693 scanned for macro replacements. I have been disabused of this notion,
4694 so now the code just undefines EX_OK before #including unistd.h.
4696 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4697 in the smtp transport. When a block could not be written in a single
4698 write() function, the timeout was being re-applied to each part-write.
4699 This seems wrong - if the receiver was accepting one byte at a time it
4700 would take for ever. The timeout is now adjusted when this happens. It
4701 doesn't have to be particularly precise.
4703 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4704 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4706 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4707 without a domain if the check to <postmaster@domain> fails.
4709 SC/01 Eximstats: added -xls and the ability to specify output files
4710 (patch written by Frank Heydlauf).
4712 SC/02 Eximstats: use FileHandles for outputting results.
4714 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4716 SC/04 Eximstats: fixed display of large numbers with -nvr option
4718 SC/05 Eximstats: fixed merging of reports with empty tables.
4720 SC/06 Eximstats: added the -include_original_destination flag
4722 SC/07 Eximstats: removed tabs and trailing whitespace.
4724 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4726 TK/06 MBOX spool code: Add real "From " MBOX separator line
4727 so the .eml file is really in mbox format (even though
4728 most programs do not really care). Patch from Alex Miller.
4730 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4731 The latter is generated from $received_to and is only set if the
4732 message has one envelope recipient. SA can use these headers,
4733 obviously out-of-the-box. Patch from Alex Miller.
4735 PH/08 The ${def test on a variable was returning false if the variable's
4736 value was "0", contrary to what the specification has always said!
4737 The result should be true unless the variable is empty.
4739 PH/09 The syntax error of a character other than { following "${if
4740 def:variable_name" (after optional whitespace) was not being diagnosed.
4741 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4742 accidental colon was present, for example, could give incorrect results.
4744 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4745 result is used (not including appendfile, where other changes are about
4748 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4749 This involved changing a lot of size variables from int to off_t. It
4750 should work with maildirs and everything.
4752 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4753 spamd dying while we are connected to it.
4755 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4758 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4759 function for BDB 4.3.
4761 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4763 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4764 the sources for PCRE have been re-arranged and more files are now
4767 PH/15 The code I had for printing potentially long long variables in PH/11
4768 above was not the best (it lost precision). The length of off_t variables
4769 is now inspected at build time, and an appropriate printing format (%ld
4770 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4771 to be "long long int" or "long int". This is needed for the internal
4772 formatting function string_vformat().
4774 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4775 the configuration file to be ":syslog", then the script "guesses" where
4776 the logs files are, rather than using the compiled in default. In our
4777 case the guess is not the same as the compiled default, so the script
4778 suddenly stopped working when I started to use syslog. The patch checks
4779 to see if log_file_path is "". If so, it attempts to read it from exim
4780 with no configuration file to get the compiled in version, before it
4781 falls back to the previous guessing code."
4783 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4784 implementing BATV in an Exim configuration. See NewStuff for the gory
4787 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4788 Makefile that are specific to HP-UX.
4790 PH/18 If the "use_postmaster" option was set for a recipient callout together
4791 with the "random" option, the postmaster address was used as the MAIL
4792 FROM address for the random test, but not for the subsequent recipient
4793 test. It is now used for both.
4795 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4796 patch removes a few documentation additions to RFC 3028, because the
4797 latest draft now contains them. It adds the new en;ascii-case comparator
4798 and a new error check for 8bit text in MIME parts. Comparator and
4799 require names are now matched exactly. I enabled the subaddress
4800 extension, but it is not well tested yet (read: it works for me)."
4802 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4803 rework some of the code of TK/09 above to avoid the hardwired use of
4804 "%lld" and "long long". Replaced the call to snprintf() with a call to
4807 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4808 records point to non-existent hosts", "retry timeout exceeded", and
4809 "retry time not reached for any host after a long failure period".
4811 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4812 experimental DomainKeys support:
4814 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4815 (2) On an error such as an illegally used "control", the wrong name for
4816 the control was given.
4818 These problems did NOT occur unless DomainKeys support was compiled.
4820 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4822 PH/24 Added ${if match_ip condition.
4824 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4825 databases so that it will be absolutely obvious if a crash occurs in the
4826 DB library. This is a regular occurrence (often caused by mis-matched
4829 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4830 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4831 picked up on a user's system that detects such things. There doesn't seem
4832 to be a gcc warning option for this - only an attribute that has to be
4833 put on the function's prototype. It seems that in Fedora Core 4 they have
4834 set this on a number of new functions. No doubt there will be more in due
4837 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4838 specify a transport. However, if an address that was verified by such a
4839 router was the subject of a callout, Exim crashed because it tried to
4840 read the rcpt_include_affixes from the non-existent transport. Now it
4841 just assumes that the setting of that option is false. This bug was
4842 introduced by 4.51/PH/31.
4844 PH/28 Changed -d+all to exclude +memory, because that information is very
4845 rarely of interest, but it makes the output a lot bigger. People tend to
4846 do -d+all out of habit.
4848 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4849 code in os-type was giving problems when libc.so lives in lib64, like on
4852 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4853 aren't the modern standard, and it seems that some systems' include files
4854 don't always have them. Exim was already checking for some of the newer
4855 ones like T_AAAA, and defining it itself. I've added checks for all the
4856 record types that Exim uses.
4858 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4859 not automatically generating a new one, as it is supposed to. This
4860 prevented TLS from working. If the file did exist, but contained invalid
4861 data, a new version was generated, as expected. It was only the case of a
4862 non-existent file that was broken.
4864 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4865 with a change in libdomainkeys > 0.64.
4867 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4868 from DNS. If the selector record carries the flag, it now has
4869 precedence over the domain-wide flag.
4871 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4873 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4874 the use of a port name that isn't defined in /etc/services) occurred, the
4875 message was deferred as in a normal delivery, and thus remained on the
4876 spool, instead of being failed because of the mua_wrapper setting. This
4877 is now fixed, and I tidied up some of the mua_wrapper messages at the
4880 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4881 the messages in a hash of arrays rather than using individual hashes.
4882 This is a bit cleaner and results in dramatic memory savings, albeit
4883 at a slight CPU cost.
4885 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4886 as requested by Marc Sherman.
4888 SC/10 Eximstats: added histograms for user specified patterns as requested
4891 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4893 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4894 fopen() in the content-scanning modules that did not already have it.
4900 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4901 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4903 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4905 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4907 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4908 to test Sieve filters that use "vacation".
4910 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4911 that changes the way the GnuTLS parameters are stored in the cache file.
4912 The new format can be generated externally. For backward compatibility,
4913 if the data in the cache doesn't make sense, Exim assumes it has read an
4914 old-format file, and it generates new data and writes a new file. This
4915 means that you can't go back to an older release without removing the
4918 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4919 work if there are any delivery delays because "one_time" forces the
4920 parent to be marked "delivered", so its unseen clone is never tried
4921 again. For this reason, Exim now forbids the simultaneous setting of
4924 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4925 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4926 entry if you want to know the details. The fix, however, neglected to
4927 consider the case when local delivery batching is involved. The test for
4928 "previously delivered" was not happening when checking to see if an
4929 address could be batched with a previous (undelivered) one; under
4930 certain circumstances this could lead to multiple deliveries to the same
4933 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4934 in its include files, and this causes problems building Exim.
4936 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4937 header_syntax) but Exim was just ignoring anything given after a slash.
4938 In particular, this caused confusion with an attempt to use "verify =
4939 reverse_host_lookup/defer_ok". An error is now given when options are
4940 supplied for verify items that do not have them. (Maybe reverse_host_
4941 lookup should have a defer_ok option, but that's a different point.)
4943 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4944 defined by RFC 821) to 2048, because there were problems with some AUTH
4945 commands, and RFC 1869 says the size should be increased for extended
4946 SMTP commands that take arguments.
4948 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4951 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4952 "unknown" error; now it says that the functionality isn't in the binary.
4954 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4955 an address' error message when a string expansion fails (syntax or
4956 whatever). Otherwise the password may appear in the log. Following change
4957 PH/42 below, there is no longer a chance of it appearing in a bounce
4960 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4962 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4963 of its addresses was ever tried. (Bugzilla bug #2.)
4965 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4966 the result incorrectly in the debug output. (It correctly added a newline
4967 to what was transported.)
4969 TF/01 Added $received_time.
4971 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4972 commented out examples of how to interface to a virus scanner and to
4973 SpamAssassin. Also added commented examples of av_scanner and
4974 spamd_address settings.
4976 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4977 and controls are allowed in which ACLs. There were a couple of minor
4978 errors. Some of the entries in the conditions table (which is a table of
4979 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4980 negation of where the condition IS allowed.
4982 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4984 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4985 header file does not have a version number, so I've had to invent a new
4986 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4987 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4988 radiusclient), but it was contributed by a Radius user.
4990 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4991 files or directories, for OpenSSL.
4993 PH/19 When an Exim process that is running as root has to create an Exim log
4994 file, it does so in a subprocess that runs as exim:exim so as to get the
4995 ownership right at creation (otherwise, other Exim processes might see
4996 the file with the wrong ownership). There was no test for failure of this
4997 fork() call, which would lead to the process getting stuck as it waited
4998 for a non-existent subprocess. Forks do occasionally fail when resources
4999 run out. I reviewed all the other calls to fork(); they all seem to check
5002 PH/20 When checking for unexpected SMTP input at connect time (before writing
5003 the banner), Exim was not dealing correctly with a non-positive return
5004 from the read() function. If the client had disconnected by this time,
5005 the result was a log entry for a synchronization error with an empty
5006 string after "input=" when read() returned zero. If read() returned -1
5007 (an event I could not check), uninitialized data bytes were printed.
5008 There were reports of junk text (parts of files, etc) appearing after
5011 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5013 PH/22 Added support for macro redefinition, and (re)definition in between
5014 driver and ACL definitions.
5016 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5017 forgetting to use the resulting value; it was using the unexpanded value.
5019 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5020 hadn't been configured. The fix is from Juergen Kreileder, who
5021 understands it better than I do:
5023 "Here's what I see happening with three configured cyrus_sasl
5024 authenticators configured (plain, login, cram-md5):
5026 On startup auth_cyrus_sasl_init() gets called for each of these.
5027 This means three calls to sasl_listmech() without a specified mech_list.
5028 => SASL tests which mechs of all available mechs actually work
5029 => three warnings about OTP not working
5030 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5032 With the patch, sasl_listmech() also gets called three times. But now
5033 SASL's mech_list option is set to the server_mech specified in the the
5034 authenticator. Or in other words, the answer from sasl_listmech()
5035 gets limited to just the mech you're testing for (which is different
5037 => the return list contains just 'plain' or 'login', 'cram-md5' or
5038 nothing depending on the value of ob->server_mech.
5040 I've just tested the patch: Authentication still works fine,
5041 unavailable mechs specified in the exim configuration are still
5042 caught, and the auth.log warnings about OTP are gone."
5044 PH/25 When debugging is enabled, the contents of the command line are added
5045 to the debugging output, even when log_selector=+arguments is not
5048 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5049 answer is "GNU", and only if the return is "GNU/something" is the answer
5052 PH/27 $acl_verify_message is now set immediately after the failure of a
5053 verification in an ACL, and so is available in subsequent modifiers. In
5054 particular, the message can be preserved by coding like this:
5056 warn !verify = sender
5057 set acl_m0 = $acl_verify_message
5059 Previously, $acl_verify_message was set only while expanding "message"
5060 and "log_message" when a very denied access.
5062 PH/28 Modified OS/os.c-Linux with
5064 -#ifndef OS_LOAD_AVERAGE
5065 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5067 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5068 nomenclature these days.)
5070 PH/29 Installed patch from the Sieve maintainer that adds the options
5071 sieve_useraddress and sieve_subaddress to the redirect router.
5073 PH/30 In these circumstances:
5074 . Two addresses routed to the same list of hosts;
5075 . First host does not offer TLS;
5076 . First host accepts first address;
5077 . First host gives temporary error to second address;
5078 . Second host offers TLS and a TLS session is established;
5079 . Second host accepts second address.
5080 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5081 and peerdn, if requested) that were in fact used only for the second
5084 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5085 attention to any local part prefix or suffix that was matched by the
5086 router that accepted the address. It now behaves in the same way as it
5087 does for delivery: the affixes are removed from the local part unless
5088 rcpt_include_affixes is set on the transport.
5090 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5091 timeout during the DATA phase of an incoming message.
5093 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5094 applied a patch sanctioned by the Sieve maintainer.
5096 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5097 the uid or gid is negative. A case of a negative gid caused this to be
5098 noticed. The fix allows for either to be negative.
5100 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5101 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5104 PH/36 The change PH/12 above was broken. Fixed it.
5106 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5107 the grounds that routing the same address twice would always produce the
5108 same answer. This might have been true once, but it is certainly no
5109 longer true now. Routing a child address may depend on the previous
5110 routing that produced that child. Some complicated redirection strategies
5111 went wrong when messages had multiple recipients, and made Exim's
5112 behaviour dependent on the order in which the addresses were given.
5114 I have moved the duplicate checking until after the routing is complete.
5115 Exim scans the addresses that are assigned to local and remote
5116 transports, and removes any duplicates. This means that more work will be
5117 done, as duplicates will always all be routed, but duplicates are
5118 presumably rare, so I don't expect this is of any significance.
5120 For deliveries to pipes, files, and autoreplies, the duplicate checking
5121 still happens during the routing process, since they are not going to be
5124 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5125 It corrects a timeout issue with spamd. This is Ian's comment: "The
5126 background is that sometimes spamd either never reads data from a
5127 connection it has accepted, or it never writes response data. The exiscan
5128 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5129 blindly assumes that writes won't block so it may never time out."
5131 PH/39 Allow G after quota size as well as K and M.
5133 PH/40 The value set for $authenticated_id in an authenticator may not contain
5134 binary zeroes or newlines because the value is written to log lines and
5135 to spool files. There was no check on this. Now the value is run through
5136 the string_printing() function so that such characters are converted to
5137 printable escape sequences.
5139 PH/41 $message_linecount is a new variable that contains the total number of
5140 lines in the message. Compare $body_linecount, which is the count for the
5143 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5144 bounce and delay warning messages, except in certain special cases, which
5147 (a) An SMTP error message from a remote host;
5148 (b) A message specified in a :fail: redirection;
5149 (c) A message specified in a "fail" command in a system filter;
5150 (d) A message specified in a FAIL return from the queryprogram router;
5151 (e) A message specified by the cannot_route_message router option.
5153 In these cases only, Exim does include the error details in bounce and
5154 warning messages. There are also a few cases where bland messages such
5155 as "unrouteable address" or "local delivery error" are given.
5157 PH/43 $value is now also set for the "else" part of a ${run expansion.
5159 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5160 being worked on, but at least Exim now implements the latest version to
5163 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5164 process to complete was treated as a delivery failure, a timeout while
5165 writing the message to the pipe was logged, but erroneously treated as a
5166 successful delivery. Such timeouts include transport filter timeouts. For
5167 consistency with the overall process timeout, these timeouts are now
5168 treated as errors, giving rise to delivery failures by default. However,
5169 there is now a new Boolean option for the pipe transport called
5170 timeout_defer, which, if set TRUE, converts the failures into defers for
5171 both kinds of timeout. A transport filter timeout is now identified in
5174 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5175 systems where "make" and "gmake" are different, calling "gmake" at top
5176 level broke things. I've arranged for the value of $(MAKE) to be passed
5177 from the Makefile to this script so that it can call the same version of
5181 A note about Exim versions 4.44 and 4.50
5182 ----------------------------------------
5184 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5185 changes of various kinds. As a consequence, a big documentation update was
5186 needed. This delayed the release for rather longer than seemed good, especially
5187 in the light of a couple of (minor) security issues. Therefore, the changes
5188 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5189 release. So 4.44 and 4.50 are in effect two different branches that both start
5192 I have left the 4.50 change log unchanged; it contains all the changes since
5193 4.43. The change log for 4.44 is below; many of its items are identical to
5194 those for 4.50. This seems to be the most sensible way to preserve the
5195 historical information.
5201 1. Minor wording change to the doc/README.SIEVE file.
5203 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5204 computation of the current number of files was incorrect.
5206 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5207 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5210 4. Give more explanation in the error message when the command for a transport
5211 filter fails to execute.
5213 5. There are several places where Exim runs a non-Exim command in a
5214 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5215 was being done only for the command run by the queryprogram router. It is
5216 now done for all such subprocesses. The other cases are: ${run, transport
5217 filters, and the commands run by the lmtp and pipe transports.
5219 6. Added CONFIGURE_GROUP build-time option.
5221 7. Some older OS have a limit of 256 on the maximum number of file
5222 descriptors. Exim was using setrlimit() to set 1000 as a large value
5223 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5224 systems. I've change it so that if it can't get 1000, it tries for 256.
5226 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5227 was an oversight, and furthermore, ever since the addition of extra
5228 controls (e.g. 4.43/32), the checks on when to allow different forms of
5229 "control" were broken. There should now be diagnostics for all cases when a
5230 control that does not make sense is encountered.
5232 9. Added the /retain_sender option to "control=submission".
5234 10. $recipients is now available in the predata ACL (oversight).
5236 11. Tidy the search cache before the fork to do a delivery from a message
5237 received from the command line. Otherwise the child will trigger a lookup
5238 failure and thereby defer the delivery if it tries to use (for example) a
5239 cached ldap connection that the parent has called unbind on.
5241 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5242 of $address_data from the recipient verification was clobbered by the
5243 sender verification.
5245 13. The value of address_data from a sender verification is now available in
5246 $sender_address_data in subsequent conditions in the ACL statement.
5248 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5250 15. Added a new option "connect=<time>" to callout options, to set a different
5253 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5254 was its contents. (It was OK if the option was not defined at all.)
5256 17. A "Completed" log line is now written for messages that are removed from
5257 the spool by the -Mrm option.
5259 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5260 information about exactly what failed.
5262 19. Added -dd to debug only the daemon process.
5264 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5265 handles timeouts, both on the server side and network timeouts. Renamed the
5266 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5268 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5269 It is now set to "smtps".
5271 22. $host_address is now set to the target address during the checking of
5272 ignore_target_hosts.
5274 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5275 being passed; this would have caused $sender_host_name to have been used if
5276 matching the list had actually called for a host name (not very likely,
5277 since this list is usually IP addresses). A host name is now passed as
5280 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5281 code that specifies a non-restarting handler (typically sigaction() in
5282 modern systems) in an attempt to fix a rare and obscure crash bug.
5284 25. Narrowed the window for a race in the daemon that could cause it to ignore
5285 SIGCHLD signals. This is not a major problem, because they are used only to
5286 wake it up if nothing else does.
5288 26. A malformed maildirsize file could cause Exim to calculate negative values
5289 for the mailbox size or file count. Odd effects could occur as a result.
5290 The maildirsize information is now recalculated if the size or filecount
5293 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5294 support for a long time. Removed HAVE_SYS_VFS_H.
5296 28. Installed the latest version of exipick from John Jetmore.
5298 29. In an address list, if the pattern was not a regular expression, an empty
5299 subject address (from a bounce message) matched only if the pattern was an
5300 empty string. Non-empty patterns were not even tested. This was the wrong
5301 because it is perfectly reasonable to use an empty address as part of a
5302 database query. An empty address is now tested by patterns that are
5303 lookups. However, all the other forms of pattern expect the subject to
5304 contain a local part and a domain, and therefore, for them, an empty
5305 address still always fails if the pattern is not itself empty.
5307 30. Exim went into a mad DNS loop when attempting to do a callout where the
5308 host was specified on an smtp transport, and looking it up yielded more
5309 than one IP address.
5311 31. Re-factored the code for checking spool and log partition space into a
5312 function that finds that data and another that does the check. The former
5313 is then used to implement four new variables: $spool_space, $log_space,
5314 $spool_inodes, and $log_inodes.
5316 32. The RFC2047 encoding function was originally intended for short strings
5317 such as real names; it was not keeping to the 75-character limit for
5318 encoded words that the RFC imposes. It now respects the limit, and
5319 generates multiple encoded words if necessary. To be on the safe side, I
5320 have increased the buffer size for the ${rfc2047: expansion operator from
5323 33. It is now permitted to omit both strings after an "if" condition; if the
5324 condition is true, the result is "true". As before, when the second string
5325 is omitted, a false condition yields an empty string. This makes it less
5326 cumbersome to write custom ACL and router conditions.
5328 34. Failure to deliver a bounce message always caused it to be frozen, even if
5329 there was an errors_to setting on the router. The errors_to setting is now
5332 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5333 canonical form (fully expanded) before being placed in
5334 $sender_host_address.
5336 36. The table in the code that translates DNS record types into text (T_A to
5337 "A" for instance) was missing entries for NS and CNAME. It is just possible
5338 that this could have caused confusion if both these types were looked up
5339 for the same domain, because the text type is used as part of Exim's
5340 per-process caching. But the chance of anyone hitting this buglet seems
5343 37. The dnsdb lookup has been extended in a number of ways.
5345 (1) There is a new type, "zns", which walks up the domain tree until it
5346 finds some nameserver records. It should be used with care.
5348 (2) There is a new type, "mxh", which is like "mx" except that it returns
5349 just the host names, not the priorities.
5351 (3) It is now possible to give a list of domains (or IP addresses) to be
5352 looked up. The behaviour when one of the lookups defers can be
5353 controlled by a keyword.
5355 (4) It is now possible to specify the separator character for use when
5356 multiple records are returned.
5358 38. The dnslists ACL condition has been extended: it is now possible to supply
5359 a list of IP addresses and/or domains to be looked up in a particular DNS
5362 39. Added log_selector=+queue_time_overall.
5364 40. When running the queue in the test harness, wait just a tad after forking a
5365 delivery process, to get repeatability of debugging output.
5367 41. Include certificate and key file names in error message when GnuTLS fails
5368 to set them up, because the GnuTLS error message doesn't include the name
5369 of the failing file when there is a problem reading it.
5371 42. Allow both -bf and -bF in the same test run.
5373 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5375 44. The "Exiscan patch" is now merged into the mainline Exim source.
5377 45. Sometimes the final signoff response after QUIT could fail to get
5378 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5379 < 0 before doing a fflush(). This bug looks as though it goes back to the
5380 introduction of TLS in release 3.20, but "sometimes" must have been rare
5381 because the tests only now provoked it.
5383 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5384 (this can affect the format of dates).
5386 47. exim_tidydb, when checking for the continued existence of a message for
5387 which it has found a message-specific retry record, was not finding
5388 messages that were in split spool directories. Consequently, it was
5389 deleting retry records that should have stayed in existence.
5391 48. Steve fixed some bugs in eximstats.
5393 49. The SPA authentication driver was not abandoning authentication and moving
5394 on to the next authenticator when an expansion was forced to fail,
5395 contradicting the general specification for all authenticators. Instead it
5396 was generating a temporary error. It now behaves as specified.
5398 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5399 (the order specifies the preference for clients). The order is now AES256,
5400 AES128, 3DES, ARCFOUR128.
5402 51. Small patch to Sieve code - explicitly set From: when generating an
5405 52. Exim crashed if a remote delivery caused a very long error message to be
5406 recorded - for instance if somebody sent an entire SpamAssassin report back
5407 as a large number of 550 error lines. This bug was coincidentally fixed by
5408 increasing the size of one of Exim's internal buffers (big_buffer) that
5409 happened as part of the Exiscan merge. However, to be on the safe side, I
5410 have made the code more robust (and fixed the comments that describe what
5413 53. Now that there can be additional text after "Completed" in log lines (if
5414 the queue_time_overall log selector is set), a one-byte patch to exigrep
5415 was needed to allow it to recognize "Completed" as not the last thing in
5418 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5419 patch that reportedly fixes this has been added. I am not expert enough to
5420 create a test for it. This is what the patch creator wrote:
5422 "I found a little strange behaviour of ldap code when working with
5423 Windows 2003 AD Domain, where users was placed in more than one
5424 Organization Units. When I tried to give exim partial DN, the exit code
5425 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5426 But simultaneously result of request was absolutely normal ldap result,
5427 so I produce this patch..."
5429 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5430 REFERENCE, so I have modified the code to exclude the patch when that macro
5433 55. Some experimental protocols are using DNS PTR records for new purposes. The
5434 keys for these records are domain names, not reversed IP addresses. The
5435 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5436 leaves it alone. Component reversal etc. now happens only for IP addresses.
5439 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5441 57. Double the size of the debug message buffer (to 2048) so that more of very
5442 long debug lines gets shown.
5444 58. The exicyclog utility now does better if the number of log files to keep
5445 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5447 59. Two changes related to the smtp_active_hostname option:
5449 (1) $smtp_active_hostname is now available as a variable.
5450 (2) The default for smtp_banner uses $smtp_active_hostname instead
5451 of $primary_hostname.
5453 60. The host_aton() function is supposed to be passed a string that is known
5454 to be a valid IP address. However, in the case of IPv6 addresses, it was
5455 not checking this. This is a hostage to fortune. Exim now panics and dies
5456 if the condition is not met. A case was found where this could be provoked
5457 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5458 components; fortuitously, this particular loophole had already been fixed
5459 by change 4.50/55 above.
5461 If there are any other similar loopholes, the new check in host_aton()
5462 itself should stop them being exploited. The report I received stated that
5463 data on the command line could provoke the exploit when Exim was running as
5464 exim, but did not say which command line option was involved. All I could
5465 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5466 running as the user.
5469 61. There was a buffer overflow vulnerability in the SPA authentication code
5470 (which came originally from the Samba project). I have added a test to the
5471 spa_base64_to_bits() function which I hope fixes it.
5474 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5475 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5477 63. The daemon start-up calls getloadavg() while still root for those OS that
5478 need the first call to be done as root, but it missed one case: when
5479 deliver_queue_load_max is set with deliver_drop_privilege. This is
5480 necessary for the benefit of the queue runner, because there is no re-exec
5481 when deliver_drop_privilege is set.
5483 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5484 This has been fixed.
5486 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5487 was in use, was not putting the data itself into the right store pool;
5488 consequently, it could be overwritten for a subsequent message in the same
5489 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5492 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5494 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5495 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5496 the function were treating the return as a boolean value, which happened to
5497 work because 0=false and not-0=true, but is not correct code.
5499 68. The host_aton() function was not handling scoped IPv6 addresses (those
5500 with, for example, "%eth0" on the end) correctly.
5502 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5503 negated items (that is, ~something) in unsigned ints. Some compilers
5504 apparently mutter when there is no cast.
5506 70. If an address verification called from an ACL failed, and did not produce a
5507 user-specific message (i.e. there was only a "system" message), nothing was
5508 put in $acl_verify_message. In this situation, it now puts the system
5511 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5512 session; change 4.31/43 added the unwanted input to the log line - except
5513 that it did not do this in the start of session case. It now does.
5515 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5516 This is wrong and can cause the other end to generate a synchronization
5517 error if it is another Exim or anything else that does the synchronization
5518 check. A QUIT command is no longer sent after a timeout.
5520 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5521 during host lookups.
5523 74. The defer_ok option of callout verification was not working if it was used
5524 when verifying addresses in header lines, that is, for this case:
5526 verify = header_sender/callout=defer_ok
5528 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5529 those file descriptors could be used for SMTP connections. If anything
5530 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5531 could be sent to the SMTP client, causing chaos. The daemon now opens
5532 stdin, stdout, and stderr to /dev/null when it puts itself into the
5535 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5536 log by default. The user can override this with suitable Perl magic.
5538 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5539 the log message when discard triggers, was not working for the DATA ACL or
5540 for the non-SMTP ACL.
5542 78. Error message wording change in sieve.c.
5544 79. If smtp_accept_max_per_host was set, the number of connections could be
5545 restricted to fewer than expected, because the daemon was trying to set up
5546 a new connection before checking whether the processes handling previous
5547 connections had finished. The check for completed processes is now done
5548 earlier. On busy systems, this bug wouldn't be noticed because something
5549 else would have woken the daemon, and it would have reaped the completed
5552 80. If a message was submitted locally by a user whose login name contained one
5553 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5554 It caused a spool format error. I have fixed the spool reading code. A
5555 related problem was that the "from" clause in the Received: line became
5556 illegal because of the space(s). It is now covered by ${quote_local_part.
5558 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5561 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5563 83. Patch from Sieve maintainer to fix unterminated string problem in
5564 "vacation" handling.
5566 84. Some minor changes to the Linux configuration files to help with other
5567 OS variants using glibc.
5569 85. One more patch for Sieve to update vacation handling to latest spec.
5572 ----------------------------------------------------
5573 See the note above about the 4.44 and 4.50 releases.
5574 ----------------------------------------------------
5580 1. Change 4.43/35 introduced a bug that caused file counts to be
5581 incorrectly computed when quota_filecount was set in an appendfile
5584 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5585 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5588 3. Give more explanation in the error message when the command for a transport
5589 filter fails to execute.
5591 4. There are several places where Exim runs a non-Exim command in a
5592 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5593 was being done only for the command run by the queryprogram router. It is
5594 now done for all such subprocesses. The other cases are: ${run, transport
5595 filters, and the commands run by the lmtp and pipe transports.
5597 5. Some older OS have a limit of 256 on the maximum number of file
5598 descriptors. Exim was using setrlimit() to set 1000 as a large value
5599 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5600 systems. I've change it so that if it can't get 1000, it tries for 256.
5602 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5603 was an oversight, and furthermore, ever since the addition of extra
5604 controls (e.g. 4.43/32), the checks on when to allow different forms of
5605 "control" were broken. There should now be diagnostics for all cases when a
5606 control that does not make sense is encountered.
5608 7. $recipients is now available in the predata ACL (oversight).
5610 8. Tidy the search cache before the fork to do a delivery from a message
5611 received from the command line. Otherwise the child will trigger a lookup
5612 failure and thereby defer the delivery if it tries to use (for example) a
5613 cached ldap connection that the parent has called unbind on.
5615 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5616 of $address_data from the recipient verification was clobbered by the
5617 sender verification.
5619 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5620 was its contents. (It was OK if the option was not defined at all.)
5622 11. A "Completed" log line is now written for messages that are removed from
5623 the spool by the -Mrm option.
5625 12. $host_address is now set to the target address during the checking of
5626 ignore_target_hosts.
5628 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5629 being passed; this would have caused $sender_host_name to have been used if
5630 matching the list had actually called for a host name (not very likely,
5631 since this list is usually IP addresses). A host name is now passed as
5634 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5635 code that specifies a non-restarting handler (typically sigaction() in
5636 modern systems) in an attempt to fix a rare and obscure crash bug.
5638 15. Narrowed the window for a race in the daemon that could cause it to ignore
5639 SIGCHLD signals. This is not a major problem, because they are used only to
5640 wake it up if nothing else does.
5642 16. A malformed maildirsize file could cause Exim to calculate negative values
5643 for the mailbox size or file count. Odd effects could occur as a result.
5644 The maildirsize information is now recalculated if the size or filecount
5647 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5648 support for a long time. Removed HAVE_SYS_VFS_H.
5650 18. Updated exipick to current release from John Jetmore.
5652 19. Allow an empty sender to be matched against a lookup in an address list.
5653 Previously the only cases considered were a regular expression, or an
5656 20. Exim went into a mad DNS lookup loop when doing a callout where the
5657 host was specified on the transport, if the DNS lookup yielded more than
5660 21. The RFC2047 encoding function was originally intended for short strings
5661 such as real names; it was not keeping to the 75-character limit for
5662 encoded words that the RFC imposes. It now respects the limit, and
5663 generates multiple encoded words if necessary. To be on the safe side, I
5664 have increased the buffer size for the ${rfc2047: expansion operator from
5667 22. Failure to deliver a bounce message always caused it to be frozen, even if
5668 there was an errors_to setting on the router. The errors_to setting is now
5671 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5672 canonical form (fully expanded) before being placed in
5673 $sender_host_address.
5675 24. Updated eximstats to version 1.33
5677 25. Include certificate and key file names in error message when GnuTLS fails
5678 to set them up, because the GnuTLS error message doesn't include the name
5679 of the failing file when there is a problem reading it.
5681 26. Expand error message when OpenSSL has problems setting up cert/key files.
5684 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5685 (this can affect the format of dates).
5687 28. exim_tidydb, when checking for the continued existence of a message for
5688 which it has found a message-specific retry record, was not finding
5689 messages that were in split spool directories. Consequently, it was
5690 deleting retry records that should have stayed in existence.
5692 29. eximstats updated to version 1.35
5693 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5694 1.35 - bugfix such that pie charts by volume are generated correctly
5696 30. The SPA authentication driver was not abandoning authentication and moving
5697 on to the next authenticator when an expansion was forced to fail,
5698 contradicting the general specification for all authenticators. Instead it
5699 was generating a temporary error. It now behaves as specified.
5701 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5702 (the order specifies the preference for clients). The order is now AES256,
5703 AES128, 3DES, ARCFOUR128.
5705 31. Small patch to Sieve code - explicitly set From: when generating an
5708 32. Exim crashed if a remote delivery caused a very long error message to be
5709 recorded - for instance if somebody sent an entire SpamAssassin report back
5710 as a large number of 550 error lines. This bug was coincidentally fixed by
5711 increasing the size of one of Exim's internal buffers (big_buffer) that
5712 happened as part of the Exiscan merge. However, to be on the safe side, I
5713 have made the code more robust (and fixed the comments that describe what
5716 33. Some experimental protocols are using DNS PTR records for new purposes. The
5717 keys for these records are domain names, not reversed IP addresses. The
5718 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5719 leaves it alone. Component reversal etc. now happens only for IP addresses.
5722 34. The host_aton() function is supposed to be passed a string that is known
5723 to be a valid IP address. However, in the case of IPv6 addresses, it was
5724 not checking this. This is a hostage to fortune. Exim now panics and dies
5725 if the condition is not met. A case was found where this could be provoked
5726 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5727 components; fortuitously, this particular loophole had already been fixed
5728 by change 4.50/55 or 4.44/33 above.
5730 If there are any other similar loopholes, the new check in host_aton()
5731 itself should stop them being exploited. The report I received stated that
5732 data on the command line could provoke the exploit when Exim was running as
5733 exim, but did not say which command line option was involved. All I could
5734 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5735 running as the user.
5738 35. There was a buffer overflow vulnerability in the SPA authentication code
5739 (which came originally from the Samba project). I have added a test to the
5740 spa_base64_to_bits() function which I hope fixes it.
5743 36. The daemon start-up calls getloadavg() while still root for those OS that
5744 need the first call to be done as root, but it missed one case: when
5745 deliver_queue_load_max is set with deliver_drop_privilege. This is
5746 necessary for the benefit of the queue runner, because there is no re-exec
5747 when deliver_drop_privilege is set.
5749 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5750 was in use, was not putting the data itself into the right store pool;
5751 consequently, it could be overwritten for a subsequent message in the same
5752 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5755 38. Sometimes the final signoff response after QUIT could fail to get
5756 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5757 < 0 before doing a fflush(). This bug looks as though it goes back to the
5758 introduction of TLS in release 3.20, but "sometimes" must have been rare
5759 because the tests only now provoked it.
5765 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5766 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5767 Now it returns an integer. A number of calls were still expecting a T/F
5768 return. Fortuitously, in all cases, the tests worked in OK situations,
5769 which is the norm. However, things would have gone wrong on any write
5770 failures on the smtp file descriptor. This function is used when sending
5771 messages over SMTP and also when doing verify callouts.
5773 2. When Exim is called to do synchronous delivery of a locally submitted
5774 message (the -odf or -odi options), it no longer closes stderr before doing
5777 3. Implemented the mua_wrapper option.
5779 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5781 5. Implemented the functions header_remove(), header_testname(),
5782 header_add_at_position(), and receive_remove_recipient(), and exported them
5785 6. If an ACL "warn" statement specified the addition of headers, Exim already
5786 inserted X-ACL-Warn: at the start if there was no header name. However, it
5787 was not making this test for the second and subsequent header lines if
5788 there were newlines in the string. This meant that an invalid header could
5789 be inserted if Exim was badly configured.
5791 7. Allow an ACL "warn" statement to add header lines at the start or after all
5792 the Received: headers, as well as at the end.
5794 8. Added the rcpt_4xx retry error code.
5796 9. Added postmaster_mailfrom=xxx to callout verification option.
5798 10. Added mailfrom=xxxx to the callout verification option, for verify=
5801 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5802 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5804 12. Inserted some casts to stop certain compilers warning when using pointer
5805 differences as field lengths or precisions in printf-type calls (mostly
5806 affecting debugging statements).
5808 13. Added optional readline() support for -be (dynamically loaded).
5810 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5811 same clock tick as a message's arrival, so that its received time was the
5812 same as the "first fail" time on the retry record, and that message
5813 remained on the queue past the ultimate address timeout, every queue runner
5814 would try a delivery (because it was past the ultimate address timeout) but
5815 after another failure, the ultimate address timeout, which should have then
5816 bounced the address, did not kick in. This was a "< instead of <=" error;
5817 in most cases the first failure would have been in the next clock tick
5818 after the received time, and all would be well.
5820 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5821 being recognized when the domain list was tested by the match_domain
5822 condition in an expansion string.
5824 16. Added the ${str2b64: operator.
5826 17. Exim was always calling setrlimit() to set a large limit for the number of
5827 processes, without checking whether the existing limit was already
5828 adequate. (It did check for the limit on file descriptors.) Furthermore,
5829 errors from getrlimit() and setrlimit() were being ignored. Now they are
5830 logged to the main and panic logs, but Exim does carry on, to try to do its
5831 job under whatever limits there are.
5833 18. Imported PCRE 5.0.
5835 19. Trivial typo in log message " temporarily refused connection" (the leading
5838 20. If the log selector return_path_on_delivery was set and an address was
5839 redirected to /dev/null, the delivery process crashed because it assumed
5840 that a return path would always be set for a "successful" delivery. In this
5841 case, the whole delivery is bypassed as an optimization, and therefore no
5844 21. Internal re-arrangement: the function for sending a challenge and reading
5845 a response while authentication was assuming a zero-terminated challenge
5846 string. It's now changed to take a pointer and a length, to allow for
5847 binary data in such strings.
5849 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5851 23. Exim was not respecting finduser_retries when seeking the login of the
5852 uid under which it was called; it was always trying 10 times. (The default
5853 setting of finduser_retries is zero.) Also, it was sleeping after the final
5854 failure, which is pointless.
5856 24. Implemented tls_on_connect_ports.
5858 25. Implemented acl_smtp_predata.
5860 26. If the domain in control=submission is set empty, Exim assumes that the
5861 authenticated id is a complete email address when it generates From: or
5862 Sender: header lines.
5864 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5865 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5866 chown and chgrp in /bin and hostname in /usr/bin.
5868 28. Exim was keeping the "process log" file open after each use, just as it
5869 does for the main log. This opens the possibility of it remaining open for
5870 long periods when the USR1 signal hits a daemon. Occasional processlog
5871 errors were reported, that could have been caused by this. Anyway, it seems
5872 much more sensible not to leave this file open at all, so that is what now
5875 29. The long-running daemon process does not normally write to the log once it
5876 has entered its main loop, and it closes the log before doing so. This is
5877 so that log files can straightforwardly be renamed and moved. However,
5878 there are a couple of unusual error situations where the daemon does write
5879 log entries, and I had neglected to close the log afterwards.
5881 30. The text of an SMTP error response that was received during a remote
5882 delivery was being truncated at 512 bytes. This is too short for some of
5883 the long messages that one sometimes sees. I've increased the limit to
5886 31. It is now possible to make retry rules that apply only when a message has a
5887 specific sender, in particular, an empty sender.
5889 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5890 it possible to be selective about when SMTP synchronization is enforced.
5892 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5894 32. Implemented hosts_connection_nolog.
5896 33. Added an ACL for QUIT.
5898 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5901 35. Added mailbox_size and mailbox_filecount to appendfile.
5903 36. Added control = no_multiline_responses to ACLs.
5905 37. There was a bug in the logic of the code that waits for the clock to tick
5906 in the case where the clock went backwards by a substantial amount such
5907 that the microsecond fraction of "now" was more than the microsecond
5908 fraction of "then" (but the whole seconds number was less).
5910 38. Added support for the libradius Radius client library this is found on
5911 FreeBSD (previously only the radiusclient library was supported).
5917 1. When certain lookups returned multiple values in the form name=value, the
5918 quoting of the values was not always being done properly. Specifically:
5919 (a) If the value started with a double quote, but contained no whitespace,
5921 (b) If the value contained whitespace other than a space character (i.e.
5922 tabs or newlines or carriage returns) it was not quoted.
5923 This fix has been applied to the mysql and pgsql lookups by writing a
5924 separate quoting function and calling it from the lookup code. The fix
5925 should probably also be applied to nisplus, ibase and oracle lookups, but
5926 since I cannot test any of those, I have not disturbed their existing code.
5928 2. A hit in the callout cache for a specific address caused a log line with no
5929 reason for rejecting RCPT. Now it says "Previous (cached) callout
5930 verification failure".
5932 3. There was an off-by-one bug in the queryprogram router. An over-long
5933 return line was truncated at 256 instead of 255 characters, thereby
5934 overflowing its buffer with the terminating zero. As well as fixing this, I
5935 have increased the buffer size to 1024 (and made a note to document this).
5937 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5938 when Exim is waiting for an SMTP response from a remote server, Exim
5939 restarts its select() call on the socket, thereby resetting its timeout.
5940 This is not a problem when such interrupts are rare. Somebody set up a cron
5941 job to run exiwhat every 2 minutes, which is less than the normal select()
5942 timeout (5 or 10 minutes). This meant that the select() timeout never
5943 kicked in because it was always reset. I have fixed this by comparing the
5944 time when an interrupt arrives with the time at the start of the first call
5945 to select(). If more time than the timeout has elapsed, the interrupt is
5946 treated as a timeout.
5948 5. Some internal re-factoring in preparation for the addition of Sieve
5949 extensions (by MH). In particular, the "personal" test is moved to a
5950 separate function, and given an option for scanning Cc: and Bcc: (which is
5951 not set for Exim filters).
5953 6. When Exim created an email address using the login of the caller as the
5954 local part (e.g. when creating a From: or Sender: header line), it was not
5955 quoting the local part when it contained special characters such as @.
5957 7. Installed new OpenBSD configuration files.
5959 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5960 try to make them clearer.
5962 9. Callout options, other than the timeout value, were being ignored when
5963 verifying sender addresses in header lines. For example, when using
5965 verify = header_sender/callout=no_cache
5967 the cache was (incorrectly) being used.
5969 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5970 only the Cygwin environment.
5972 11. When return_path_on_delivery was set as a log selector, if different remote
5973 addresses in the same message used different return paths and parallel
5974 remote delivery occurred, the wrong values would sometimes be logged.
5975 (Whenever a remote delivery process finished, the return path value from
5976 the most recently started remote delivery process was logged.)
5978 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5979 lines when AUTH and/or TLS are in use. This is the "received protocol"
5980 field. Exim used to use "asmtp" for authenticated SMTP, without any
5981 indication (in the protocol name) for TLS use. Now it follows the RFC and
5982 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5983 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5984 names appear in log lines as well as in Received: header lines.
5986 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5987 extensions, and comparison tests, and to fix some bugs.
5989 14. Changes to the "personal" filter test:
5991 (1) The test was buggy in that it was just doing the equivalent of
5992 "contains" tests on header lines. For example, if a user's address was
5993 anne@some.where, the "personal" test would incorrectly be true for
5995 To: susanne@some.where
5997 This test is now done by extracting each address from the header in turn,
5998 and checking the entire address. Other tests that are part of "personal"
5999 are now done using regular expressions (for example, to check local parts
6000 of addresses in From: header lines).
6002 (2) The list of non-personal local parts in From: addresses has been
6003 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6004 taken from the Sieve specification recommendations.
6006 (3) If the message contains any header line starting with "List-" it is
6007 treated as non-personal.
6009 (4) The test for "circular" in the Subject: header line has been removed
6010 because it now seems ill-conceived.
6012 15. Minor typos in src/EDITME comments corrected.
6014 16. Installed latest exipick from John Jetmore.
6016 17. If headers_add on a router specified a text string that was too long for
6017 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6018 of string_sprintf() is now avoided.
6020 18. $message_body_size was not set (it was always zero) when running the DATA
6021 ACL and the local_scan() function.
6023 19. For the "mail" command in an Exim filter, no default was being set for
6024 the once_repeat time, causing a random time value to be used if "once" was
6025 specified. (If the value happened to be <= 0, no repeat happened.) The
6026 default is now 0s, meaning "never repeat". The "vacation" command was OK
6027 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6028 (I found it when inspecting the code).
6030 20. There is now an overall timeout for performing a callout verification. It
6031 defaults to 4 times the callout timeout, which applies to individual SMTP
6032 commands during the callout. The overall timeout applies when there is more
6033 than one host that can be tried. The timeout is checked before trying the
6034 next host. This prevents very long delays if there are a large number of
6035 hosts and all are timing out (e.g. when the network connections are timing
6036 out). The value of the overall timeout can be changed by specifying an
6037 additional sub-option for "callout", called "maxwait". For example:
6039 verify = sender/callout=5s,maxwait=20s
6041 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6042 to the end before writing, but this should make it even safer).
6044 22. Exim was forgetting that it had advertised PIPELINING for the second and
6045 subsequent messages on an SMTP connection. It was also not resetting its
6046 memory on STARTTLS and an internal HELO.
6048 23. When Exim logs an SMTP synchronization error within a session, it now
6049 records whether PIPELINING has been advertised or not.
6051 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6052 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6053 rather than long int.
6055 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6057 26. Added the never_mail option to autoreply.
6063 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6064 crash if the getsockname() call failed; this can happen if a connection is
6065 closed very soon after it is established. The problem was simply in the
6066 order in which certain operations were done, causing Exim to try to write
6067 to the SMTP stream before it had set up the file descriptor. The bug has
6068 been fixed by making things happen in the correct order.
6074 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6075 before the connection was closed, thus losing the rejection response.
6077 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6078 some early Solaris releases, but causes trouble in current releases where
6079 socklen_t is defined.
6081 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6084 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6087 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6088 that releasing the top of it at the end releases what was used for sub-
6089 expansions (unless the block got too big). However, discard this block if
6090 the first thing is a variable or header, so that we can use its block when
6091 it is dynamic (useful for very large $message_headers, for example).
6093 6. Lookups now cache *every* query, not just the most recent. A new, separate
6094 store pool is used for this. It can be recovered when all lookup caches are
6095 flushed. Lookups now release memory at the end of their result strings.
6096 This has involved some general refactoring of the lookup sources.
6098 7. Some code has been added to the store_xxx() functions to reduce the amount
6099 of flapping under certain conditions.
6101 8. log_incoming_interface used to affect only the <= reception log lines. Now
6102 it causes the local interface and port to be added to several more SMTP log
6103 lines, for example "SMTP connection from", and rejection lines.
6105 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6107 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6109 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6110 could be overwritten at the end of the current message (or the start of a
6111 new message if it was set in a HELO ACL). The value is now preserved for
6112 the duration of the SMTP connection.
6114 12. If a transport had a headers_rewrite setting, and a matching header line
6115 contained an unqualified address, that address was qualified, even if it
6116 did not match any rewriting rules. The underlying bug was that the values
6117 of the flags that permit the existence of unqualified sender and recipient
6118 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6119 non-local messages, and by -bnq for local messages) were not being
6120 preserved with the message after it was received.
6122 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6123 "next input=" as part of the text comprising the host identity instead of
6124 the correct text. The code was using the same buffer for two different
6125 strings. However, depending on which order the printing function evaluated
6126 its arguments, the bug did not always show up. Under Linux, for example, my
6127 test suite worked just fine.
6129 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6130 doesn't work with some older versions of Perl. It has been changed to "my",
6131 which in any case is probably the better facility to use.
6133 15. A really picky compiler found some instances of statements for creating
6134 error messages that either had too many or two few arguments for the format
6137 16. The size of the buffer for calls to the DNS resolver has been increased
6138 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6139 for addresses that have a lot of PTR records. This alleviates a problem; it
6140 does not fully solve it.
6142 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6143 buffer now truncates the list and logs the incident, which is the same
6144 action as happens when Exim is looking up a host name and its aliases.
6145 Previously in this situation something unpredictable would happen;
6146 sometimes it was "internal error: store_reset failed".
6148 18. If a server dropped the connection unexpectedly when an Exim client was
6149 using GnuTLS and trying to read a response, the client delivery process
6150 crashed while trying to generate an error log message.
6152 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6153 string, for example:
6155 warn message = H1: something\nH2: something
6157 the text was added as a single header line from Exim's point of view
6158 though it ended up OK in the delivered message. However, searching for the
6159 second and subsequent header lines using $h_h2: did not work. This has been
6160 fixed. Similarly, if a system filter added multiple headers in this way,
6161 the routers could not see them.
6163 20. Expanded the error message when iplsearch is called with an invalid key to
6164 suggest using net-iplsearch in a host list.
6166 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6167 ACLs are no longer actually imposed (and a message to that effect is
6170 22. If a "gecos" field in a passwd entry contained escaped characters, in
6171 particular, if it contained a \" sequence, Exim got it wrong when building
6172 a From: or a Sender: header from that name. A second bug also caused
6173 incorrect handling when an unquoted " was present following a character
6174 that needed quoting.
6176 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6177 was not being matched caselessly.
6179 24. Arranged for all hyphens in the exim.8 source to be escaped with
6182 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6183 properly. Recipient callout cache records were still being keyed to include
6184 the sender, even when use_sender was set false. This led to far more
6185 callouts that were necessary. The sender is no longer included in the key
6186 when use_sender is false.
6188 26. Added "control = submission" modifier to ACLs.
6190 27. Added the ${base62d: operator to decode base 62 numbers.
6192 28. dnsdb lookups can now access SRV records.
6194 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6195 the configuration file.
6197 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6198 (-v) mode. This makes the output for a verbose queue run more intelligible.
6200 31. Added a use_postmaster feature to recipient callouts.
6202 32. Added the $body_zerocount variable, containing the number of binary zero
6203 bytes in the message body.
6205 33. The time of last modification of the "new" subdirectory is now used as the
6206 "mailbox time last read" when there is a quota error for a maildir
6209 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6211 35. Added +ignore_unknown as a special item in host lists.
6213 36. Code for decoding IPv6 addresses in host lists is now included, even if
6214 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6215 address was recognized as an IP address, but was then not correctly decoded
6216 into binary, causing unexpected and incorrect effects when compared with
6223 1. Very minor rewording of debugging text in manualroute to say "list of
6224 hosts" instead of "hostlist".
6226 2. If verify=header_syntax was set, and a header line with an unqualified
6227 address (no domain) and a large number of spaces between the end of the
6228 name and the colon was received, the reception process suffered a buffer
6229 overflow, and (when I tested it) crashed. This was caused by some obsolete
6230 code that should have been removed. The fix is to remove it!
6232 3. When running in the test harness, delay a bit after writing a bounce
6233 message to get a bit more predictability in the log output.
6235 4. Added a call to search_tidyup() just before forking a reception process. In
6236 theory, someone could use a lookup in the expansion of smtp_accept_max_
6237 per_host which, without the tidyup, could leave open a database connection.
6239 5. Added the variables $recipient_data and $sender_data which get set from a
6240 lookup success in an ACL "recipients" or "senders" condition, or a router
6241 "senders" option, similar to $domain_data and $local_part_data.
6243 6. Moved the writing of debug_print from before to after the "senders" test
6246 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6247 problems for message scanning, either using a data ACL, or using
6248 local_scan() because the Received: header was not generated till after they
6249 were called (in order to set the time as the time of reception completion).
6250 I have revised the way this works. The header is now generated after the
6251 body is received, but before the ACL or local_scan() are called. After they
6252 are run, the timestamp in the header is updated.
6258 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6259 before starting a queue runner without re-exec. This happened only when
6260 deliver_drop_privilege was set or when the Exim user was set to root. The
6261 effect of the bug was that timeouts during subsequent deliveries caused
6262 crashes instead of being properly handled. The handler is now left at its
6263 default (and expected) setting.
6265 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6266 message, again when deliver_drop_privilege is set or Exim is run as root.
6267 The bug described in (1) was not present in this case, but the tidying up
6268 of the other signals was missing. I have made the two cases consistent.
6270 3. The ignore_target_hosts setting on a manualroute router was being ignored
6271 for hosts that were looked up using the /MX notation.
6273 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6276 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6277 operated on the sender address. After changing the $sender_address to <>
6278 for the sender address verify, Exim was re-instated it as the original
6279 (before rewriting) address, but remembering that it had rewritten it, so it
6280 wasn't rewriting it again. This bug also had the effect of breaking the
6281 sender address verification caching when the sender address was rewritten.
6283 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6284 This has been changed so that if the ip literal address matches
6285 ignore_target_hosts, the router declines.
6287 7. Added expansion conditions match_domain, match_address, and match_local_
6288 part (NOT match_host).
6290 8. The placeholder for the Received: header didn't have a length field set.
6292 9. Added code to Exim itself and to exim_lock to test for a specific race
6293 condition that could lead to file corruption when using MBX delivery. The
6294 issue is with the lockfile that is created in /tmp. If this file is removed
6295 after a process has opened it but before that process has acquired a lock,
6296 there is the potential for a second process to recreate the file and also
6297 acquire a lock. This could lead to two Exim processes writing to the file
6298 at the same time. The added code performs the same test as UW imapd; it
6299 checks after acquiring the lock that its file descriptor still refers to
6300 the same named file.
6302 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6303 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6306 11. Added the smtp_active_hostname option. If used, this will typically be made
6307 to depend on the incoming interface address. Because $interface_address is
6308 not set up until the daemon has forked a reception process, error responses
6309 that can happen earlier (such as "too many connections") no longer contain
6312 12. If an expansion in a condition on a "warn" statement fails because a lookup
6313 defers, the "warn" statement is abandoned, and the next ACL statement is
6314 processed. Previously this caused the whole ACL to be aborted.
6316 13. Added the iplsearch lookup type.
6318 14. Added ident_timeout as a log selector.
6320 15. Added tls_certificate_verified as a log selector.
6322 16. Added a global option tls_require_ciphers (compare the smtp transport
6323 option of the same name). This controls incoming TLS connections.
6325 17. I finally figured out how to make tls_require_ciphers do a similar thing
6326 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6327 before starting the TLS session.
6329 18. Tabs are now shown as \t in -bP output.
6331 19. If the log selector return_path_on_delivery was set, Exim crashed when
6332 bouncing a message because it had too many Received: header lines.
6334 20. If two routers both had headers_remove settings, and the first one included
6335 a superfluous trailing colon, the final name in the first list and the
6336 first name in the second list were incorrectly joined into one item (with a
6337 colon in the middle).
6343 1. Added -C and -D options to the exinext utility, mainly to make it easier
6344 to include in the automated testing, but these could be helpful when
6345 multiple configurations are in use.
6347 2. The exinext utility was not formatting the output nicely when there was
6348 an alternate port involved in the retry record key, nor when there was a
6349 message id as well (for retries that were specific to a specific message
6350 and a specific host). It was also confused by IPv6 addresses, because of
6351 the additional colons they contain. I have fixed the IPv4 problem, and
6352 patched it up to do a reasonable job for IPv6.
6354 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6355 delivery, the log line now contains "pipelined" if PIPELINING was used.
6357 4. An SMTP transport process used to panic and die if the bind() call to set
6358 an explicit outgoing interface failed. This has been changed; it is now
6359 treated in the same way as a connect() failure.
6361 5. A reference to $sender_host_name in the part of a conditional expansion
6362 that was being skipped was still causing a DNS lookup. This no longer
6365 6. The def: expansion condition was not recognizing references to header lines
6366 that used bh_ and bheader_.
6368 7. Added the _cache feature to named lists.
6370 8. The code for checking quota_filecount in the appendfile transport was
6371 allowing one more file than it should have been.
6373 9. For compatibility with Sendmail, the command line option
6381 and sets the incoming protocol and host name (for trusted callers). The
6382 host name and its colon can be omitted when only the protocol is to be set.
6383 Note the Exim already has two private options, -pd and -ps, that refer to
6384 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6385 "s", but I don't think that's a major issue.
6387 10. A number of refactoring changes to the code, none of which should affect
6390 (a) The number of logging options was getting close to filling up the
6391 32-bit word that was used as a bit map. I have split them into two classes:
6392 those that are passed in the argument to log_write(), and those that are
6393 only ever tested independently outside of that function. These are now in
6394 separate 32-bit words, so there is plenty of room for expansion again.
6395 There is no change in the user interface or the logging behaviour.
6397 (b) When building, for example, log lines, the code previously used a
6398 macro that called string_cat() twice, in order to add two strings. This is
6399 not really sufficiently general. Furthermore, there was one instance where
6400 it was actually wrong because one of the argument was used twice, and in
6401 one call a function was used. (As it happened, calling the function twice
6402 did not affect the overall behaviour.) The macro has been replaced by a
6403 function that can join an arbitrary number of extra strings onto a growing
6406 (c) The code for expansion conditions now uses a table and a binary chop
6407 instead of a serial search (which was left over from when there were very
6408 few conditions). Also, it now recognizes conditions like "pam" even when
6409 the relevant support is not compiled in: a suitably worded error message is
6410 given if an attempt is made to use such a condition.
6412 11. Added ${time_interval:xxxxx}.
6414 12. A bug was causing one of the ddress fields not to be passed back correctly
6415 from remote delivery subprocesses. The field in question was not being
6416 subsequently used, so this caused to problems in practice.
6418 13. Added new log selectors queue_time and deliver_time.
6420 14. Might have fixed a bug in maildirsizefile handling that threw up
6421 "unexpected character" debug warnings, and recalculated the data
6422 unnecessarily. In any case, I expanded the warning message to give more
6425 15. Added the message "Restricted characters in address" to the statements in
6426 the default ACL that block characters like @ and % in local parts.
6428 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6429 Three changes have been made:
6431 (a) There was a serious bug; a negative response to MAIL caused the whole
6432 recipient domain to be cached as invalid, thereby blocking all messages
6433 to all local parts at the same domain, from all senders. This bug has
6434 been fixed. The domain is no longer cached after a negative response to
6435 MAIL if the sender used is not empty.
6437 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6440 (c) A new callout option, "use_sender" has been added for people who want
6441 the modified behaviour.
6447 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6450 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6451 indeed breaks things for older releases.
6453 3. Added additional logging to the case where there is a problem reading data
6454 from a filter that is running in a subprocess using a pipe, in order to
6455 try to track down a specific problem.
6457 4. Testing facility fudge: when running in the test harness and attempting
6458 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6459 getting "No route to host". Convert this to a timeout.
6461 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6464 6. Some OS don't have socklen_t but use size_t instead. This affects the
6465 fifth argument of getsockopt() amongst other things. This is now
6466 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6467 can be set for individual OS. I have set it for SunOS5, OSF1, and
6468 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6469 some earlier ones do not.
6471 7. Change 4.30/15 was not doing the test caselessly.
6473 8. The standard form for an IPv6 address literal was being rejected by address
6474 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6475 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6476 this, as well as the form without the "IPv6" on the front (but only when
6477 address literals are enabled, of course).
6479 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6481 10. Exim crashed if a message with an empty sender address specified by -f
6482 encountered a router with an errors_to setting. This could be provoked only
6483 by a command such as
6487 where an empty string was supplied; "<>" did not hit this bug.
6489 11. Installed PCRE release 4.5.
6491 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6492 remained set. It is now erased.
6494 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6495 times from message ids (which are base 36 rather than the normal 62).
6497 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6498 were being counted as actual protocol errors, and logged if the log
6499 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6500 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6501 and DATA following a set of rejected RCPTs do not count as protocol errors.
6502 In other words, Exim assumes they were pipelined, though this may not
6503 actually be the case. Of course, in all cases the client gets an
6504 appropriate error code.
6506 15. If a lookup fails in an ACL condition, a message about the failure may
6507 be available; it is used if testing the ACL cannot continue, because most
6508 such messages specify what the cause of the deferral is. However, some
6509 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6510 that caused an old message to be retained and used if a later statement
6511 caused a defer, replacing the real cause of the deferral.
6513 16. If an IP address had so many PTR records that the DNS lookup buffer
6514 was not large enough to hold them, Exim could crash while trying to process
6515 the truncated data. It now detects and logs this case.
6517 17. Further to 4.21/58, another change has been made: if (and only if) the
6518 first line of a message (the first header line) ends with CRLF, a bare LF
6519 in a subsequent header line has a space inserted after it, so as not to
6520 terminate the header.
6522 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6523 unnecessarily, used atoi() instead of strtol(), and didn't check the
6524 termination when getting file sizes from file names by regex.
6526 19. Completely re-implemented the support for maildirsize files, in the light
6527 of a number of problems with the previous contributed implementation
6528 (4.30/29). In particular:
6530 . If the quota is zero, the maildirsize file is maintained, but no quota is
6533 . If the maildir directory does not exist, it is created before any attempt
6534 to write a maildirsize file.
6536 . The quota value in the file is just a cache; if the quota is changed in
6537 the transport, the new value overrides.
6539 . A regular expression is available for excluding directories from the
6542 20. The autoreply transport checks the characters in options that define the
6543 message's headers; it allows continued headers, but it was checking with
6544 isspace() after an embedded newline instead of explicitly looking for a
6547 21. If all the "regular" hosts to which an address was routed had passed their
6548 expiry times, and had not reached their retry times, the address was
6549 bounced, even if fallback hosts were defined. Now Exim should go on to try
6552 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6553 equivalent code in the SMTP transport. Some hosts send humungous responses
6554 to HELO/EHLO, more than 1024 it seems.
6556 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6557 gives compiler warnings in some environments. I've now done it "properly",
6560 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6561 (because of problems with the built-in one) was declared to return uschar *
6562 instead of char *, causing compiler failure.
6564 25. Fixed a file descriptor leak when processing alias/forward files.
6566 26. Fixed a minor format string issue in dbfn.c.
6568 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6570 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6571 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6574 29. When a sender address is verified, it is cached, to save repeating the test
6575 when there is more than one recipient in a message. However, when the
6576 verification involves a callout, it is possible for different callout
6577 options to be set for different recipients. It is too complicated to keep
6578 track of this in the cache, so now Exim always runs a verification when a
6579 callout is required, relying on the callout cache for the optimization.
6580 The overhead is duplication of the address routing, but this should not be
6583 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6584 to be verified with callout=postmaster, and the main callout worked but the
6585 postmaster check failed, the verification correctly failed. However, if a
6586 subsequent RCPT command asked for sender verification *without* the
6587 postmaster check, incorrect caching caused this verification also to fail,
6590 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6591 it was not caching the DNS options (qualify_single, search_parents) that
6592 were used when the lookup failed. A subsequent lookup with different
6593 options therefore always gave the same answer, though there were cases
6594 where it should not have. (Example: a "domains = !$mx_any" option on a
6595 dnslookup router: the "domains" option is always processed without any
6596 widening, but the router might have qualify_single set.) Now Exim uses the
6597 cached value only when the same options are set.
6599 32. Added John Jetmore's "exipick" utility to the distribution.
6601 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6602 than a timeout (e.g. a certificate is required, and is not provided), an
6603 Exim server now closes the connection immediately. Previously it waited for
6604 the client to close - but if the client is SSL, it seems that they each
6605 wait for each other, leading to a delay before one of them times out.
6607 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6608 maintained 0.8.x compatibility because I don't think many are using it, and
6609 it is clearly obsolete.
6611 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6614 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6615 client certificate was expired. A simple patch fixes this, though I don't
6616 understand the full logic of why the verify callback is called multiple
6619 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6620 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6621 which causes problems with some clients (such as the Certicom SSL Plus
6622 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6623 disables the coutermeasure allowing Eudora to connect."
6625 38. Exim was not checking that a write() to a log file succeeded. This could
6626 lead to Bad Things if a log got too big, in particular if it hit a file
6627 size limit. Exim now panics and dies if it cannot write to a log file, just
6628 as it does if it cannot open a log file.
6630 39. Modified OS/Makefile-Linux so that it now contains
6632 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6634 The two -D definitions ensure that Exim is compiled with large file
6635 support, which makes it possible to handle log files that are bigger than
6638 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6639 instance) a domain was checked against a named list that involved a lookup,
6640 causing $domain_data to be set, then another domain was checked against the
6641 same list, then the first domain was re-checked, the value of $domain_data
6642 after the final check could be wrong. In particular, if the second check
6643 failed, it could be set empty. This bug probably also applied to
6646 41. The strip_trailing_dot option was not being applied to the address given
6647 with the -f command-line option.
6649 42. The code for reading a message's header from the spool was incrementing
6650 $received_count, but never initializing it. This meant that the value was
6651 incorrect (doubled) while delivering a message in the same process in which
6652 it was received. In the most common configuration of Exim, this never
6653 happens - a fresh exec is done - but it can happen when
6654 deliver_drop_privilege is set.
6656 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6657 it now includes up to 150 characters of the unexpected data in the log
6660 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6661 and building data strings. The size of both of these buffers was 10 000
6662 bytes - far larger than anybody would *ever* want, thought I. Needless to
6663 say, somebody hit the limit. I have increased the maximum line length to
6664 20 000 and the maximum data length of concatenated lines to 100 000. I have
6665 also fixed two bugs, because there was no checking on these buffers. Tsk,
6666 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6667 buffer is too small.
6669 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6670 lsearch lookups. Now it does.
6672 46. When parsing a route_list item in a manualroute router, a fixed-length
6673 buffer was used for the list of hosts. I made this 1024 bytes long,
6674 thinking that nobody would ever have a list of hosts that long. Wrong.
6675 Somebody had a whole pile of complicated expansion conditions, and the
6676 string was silently truncated, leading to an expansion error. It turns out
6677 that it is easier to change to an unlimited length (owing to other changes
6678 that have happened since this code was originally written) than to build
6679 structure for giving a limitation error. The length of the item that
6680 expands into the list of hosts is now unlimited.
6682 47. The lsearch lookup could not handle data where the length of text line was
6683 more than 4095 characters. Such lines were truncated, leading to shortened
6684 data being returned. It should now handle lines of any length.
6686 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6687 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6690 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6691 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6692 no longer happens in comment lines. A list of replacements is now placed
6693 at the head of all of the source files, except those whose only change is
6694 to replace PERL_COMMAND in the very first #! line.
6696 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6697 messages on the queue, with a bottom-up merge sort, using code contributed
6698 by Michael Haardt. This should make operations like -bp somewhat faster on
6699 large queues. It won't affect queue runners, except when queue_run_in_order
6702 51. Installed eximstats 1.31 in the distribution.
6704 52. Added support for SRV lookups to the dnslookup router.
6706 53. If an ACL referred to $message_body or $message_body_end, the value was not
6707 reset for any messages that followed in the same SMTP session.
6709 54. The store-handling optimization for building very long strings was not
6710 differentiating between the different store pools. I don't think this
6711 actually made any difference in practice, but I've tidied it.
6713 55. While running the routers to verify a sender address, $sender_address
6714 was still set to the sender address. This is wrong, because when routing to
6715 send a bounce to the sender, it would be empty. Therefore, I have changed
6716 it so that, while verifying a sender address, $sender_address is set to <>.
6717 (There is no change to what happens when verifying a recipient address.)
6719 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6720 target A or AAAA records (if not already returned) without resetting the
6721 qualify_single or search_parents options of the DNS resolver. These are
6722 inappropriate in this case because the targets of MX and SRV records must
6723 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6724 target that, when qualified, matched something in the local domain. These
6725 two options are now turned off when doing these lookups.
6727 57. It seems that at least some releases of Reiserfs (which does not have the
6728 concept of a fixed number of inodes) returns zero and not -1 for the
6729 number of available inodes. This interacted badly with check_spool_inodes,
6730 which assumed that -1 was the "no such thing" setting. What I have done is
6731 to check that the total number of inodes is greater than zero before doing
6732 the test of how many are available.
6734 58. When a "warn" ACL statement has a log_message modifier, the message is
6735 remembered, and not repeated. This is to avoid a lot of repetition when a
6736 message has many recipients that cause the same warning to be written.
6737 However, Exim was preserving the list of already written lines for an
6738 entire SMTP session, which doesn't seem right. The memory is now reset if a
6739 new message is started.
6741 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6742 debugging output unless log_rewrite was also set.
6744 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6745 of (int)(handle) when we know that handle contains (void *)(-1).
6747 61. The Exim daemon panic-logs an error return when it closes the incoming
6748 connection. However "connection reset by peer" seems to be common, and
6749 isn't really an error worthy of noting specially, so that particular error
6752 62. When Exim is trying to find all the local interfaces, it used to panic and
6753 die if the ioctl to get the interface flags failed. However, it seems that
6754 on at least one OS (Solaris 9) it is possible to have an interface that is
6755 included in the list of interfaces, but for which you get a failure error
6756 for this call. This happens when the interface is not "plumbed" into a
6757 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6758 failure of the "get flags" call assumes that the interface is down.
6760 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6761 makes life easier for people who are doing arithmetic on fields extracted
6762 from dates, where you often get leading zeros that should not be
6763 interpreted as octal.
6765 64. Added qualify_domain to the redirect router, to override the global
6768 65. If a pathologically long header line contained very many addresses (the
6769 report of this problem mentioned 10 000) and each of them was rewritten,
6770 Exim could use up a very large amount of memory. (It kept on making new
6771 copies of the header line as it rewrote, and never released the old ones.)
6772 At the expense of a bit more processing, the header rewriting function has
6773 been changed so that it no longer eats memory in this way.
6775 66. The generation of the Received: header has been moved from the time that a
6776 message starts to be received, to the time that it finishes. The timestamp
6777 in the Received: header should now be very close to that of the <= log
6778 line. There are two side-effects of this change:
6780 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6781 logged header lines no longer include the local Received: line, because
6782 it has not yet been created. The same applies to a copy of the message
6783 that is returned to a non-SMTP sender when a message is rejected.
6785 (b) When a filter file is tested using -bf, no additional Received: header
6786 is added to the test message. After some thought, I decided that this
6789 This change does not affect the value of $received_for. It is still set
6790 after address rewriting, but before local_scan() is called.
6792 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6794 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6795 gave an unhelpful panic error message, and a defer error. I have managed to
6796 change this behaviour so that it now rejects any supplied certificate,
6797 which seems right, as the list of acceptable certificates is empty.
6799 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6800 gave an unhelpful defer error. I have not managed to make this reject any
6801 supplied certificates, but the error message it gives is "no certificate
6802 supplied", which is not helpful.
6804 70. exigrep's output now also includes lines that are not associated with any
6805 message, but which match the given pattern. Implemented by a patch from
6806 Martin Sluka, which also tidied up the Perl a bit.
6808 71. Recipient callout verification, like sender verification, was using <> in
6809 the MAIL FROM command. This isn't really the right thing, since the actual
6810 sender may affect whether the remote host accepts the recipient or not. I
6811 have changed it to use the actual sender in the callout; this means that
6812 the cache record is now keyed on a recipient/sender pair, not just the
6813 recipient address. There doesn't seem to be a real danger of callout loops,
6814 since a callout by the remote host to check the sender would use <>.
6815 [SEE ABOVE: changed after hitting problems.]
6817 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6818 temporary errors. However, in the case of such a code being given after
6819 the end of a data transmission (i.e. after ".") Exim was failing to write
6820 a retry record for the message. (Yes, there was some broken host that was
6821 actually sending 8xx at this point.)
6823 73. An unknown lookup type in a host list could cause Exim to panic-die when
6824 the list was checked. (An example that provoked this was putting <; in the
6825 middle of a list instead of at the start.) If this happened during a DATA
6826 ACL check, a -D file could be left lying around. This kind of configuration
6827 error no longer causes Exim to die; instead it causes a defer error. The
6828 incident is still logged to the main and panic logs.
6830 74. Buglet left over from Exim 3 conversion. The message "too many messages
6831 in one connection" was written to the rejectlog but not the mainlog, except
6832 when address rewriting (yes!) was being logged.
6834 75. Added write_rejectlog option.
6836 76. When a system filter was run not as root (that is, when system_filter_user
6837 was set), the values of the $n variables were not being returned to the
6838 main process; thus, they were not subsequently available in the $sn
6841 77. Added +return_path_on_delivery log selector.
6843 78. A connection timeout was being treated differently from recipients deferred
6844 when testing hosts_max_try with a message that was older than the host's
6845 retry timeout. (The host should not be counted, thus allowing all hosts to
6846 be tried at least once before bouncing.) This may have been the cause of an
6847 occasionally reported bug whereby a message would remain on the queue
6848 longer than the retry timeout, but would be bounced if a delivery was
6849 forced. I say "may" because I never totally pinned down the problem;
6850 setting up timeout/retry tests is difficult. See also the next item.
6852 79. The ultimate address timeout was not being applied to errors that involved
6853 a combination of host plus message (for example, a timeout on a MAIL
6854 command). When an address resolved to a number of possible hosts, and they
6855 were not all tried for each delivery (e.g. because of hosts_max_try), a
6856 message could remain on the queue longer than the retry timeout.
6858 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6861 81. Fixed an obscure SMTP outgoing bug which required at least the following
6862 conditions: (a) there was another message waiting for the same server;
6863 (b) the server returned 5xx to all RCPT commands in the first message so
6864 that the message was not completed; (c) the server dropped the connection
6865 or gave a negative response to the RSET that Exim sends to abort the
6866 transaction. The observed case was a dropped connection after DATA that had
6867 been sent in pipelining mode. That is, the server had advertised PIPELINING
6868 but was not implementing it correctly. The effect of the bug was incorrect
6869 behaviour, such as trying another host, and this could lead to a crash.
6875 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6876 and daemon.c were passed as pointers to ints; they should have been
6877 pointers to socklen_t variables (which are typically unsigned ints).
6879 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6882 3. Fixed a really odd bug that affected only the testing scheme; patching a
6883 certain fixed string in the binary changed the value of another string that
6884 happened to be identical to the end of the original first string.
6886 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6887 name", it returns that address as the IP address. On some operating
6888 systems (e.g. Solaris), it also passes back the IP address string as the
6889 "host name". However, on others (e.g. Linux), it passes back an empty
6890 string. Exim wasn't checking for this, and was changing the host name to an
6891 empty string, assuming it had been canonicalized.
6893 5. Although rare, it is permitted to have more than one PTR record for a given
6894 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6895 all the names associated with an address, because they do in Solaris.
6896 However, it seems that they do not in Linux for data that comes from the
6897 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6898 I found this out when I moved to a new Linux workstation and tried to run
6899 the Exim test suite.
6901 To get round this problem I have changed the code so that it now does its
6902 own call to the DNS to look up PTR records when searching for a host name.
6903 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6904 addresses that are only in /etc/hosts are still found.
6906 This behaviour is, however, controlled by an option called host_lookup_
6907 order, which defaults to "bydns:byaddr". If people want to use the other
6908 order, or indeed, just use one or the other means of lookup, they can
6909 specify it in this variable.
6911 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6912 some operating systems, this comes back from gethostbyaddr() as an empty
6913 string, and this is what Exim used to test for. However, it seems that in
6914 other systems, "." is yielded. Exim now tests for this case too.
6916 7. The values of check_spool_space and check_log_space are now held internally
6917 as a number of kilobytes instead of an absolute number of bytes. If a
6918 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6919 kilobyte. This means that much larger values can be stored.
6921 8. Exim monitor: an attempt to get the action menu when not actually pointing
6922 at a message produces an empty menu entitled "No message selected". This
6923 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6924 no entries in it ("Shell widget menu has zero width and/or height"). So I
6925 have added a single, blank menu entry in this case.
6927 9. Added ${quote_local_part.
6929 10. MIME decoding is now applied to the contents of Subject: header lines when
6932 11. Now that a reference to $sender_host_address automatically causes a reverse
6933 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6934 host lookup before query-style lookups in lists that might use this
6935 variable. This has therefore been abolished, and the "net-" prefix is no
6936 longer necessary for query-style lookups.
6938 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6939 have been a typo for LFLAGS, so it has been changed.
6941 13. The install script calls Exim with "-C /dev/null" in order to find the
6942 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6943 to be output. However, since Exim outputs its version number before the
6944 error, it didn't break the script. It just looked ugly. I fixed this by
6945 always allowing "-C /dev/null" if the caller is root.
6947 14. Ignore overlarge ACL variable number when reading spool file - insurance
6948 against a later release with more variables having written the file.
6950 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6951 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6952 this, as well as the form without the "IPv6" on the front.
6954 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6955 OS/Makefile-Darwin file.
6957 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6958 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6960 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6961 variable. However, some OS use ints for inodes. I've added cast to long int
6962 to get rid of the compiler warning.
6964 19. I had forgotten to lock out "/../" in configuration file names when
6965 ALT_CONFIG_PREFIX was set.
6967 20. Routers used for verification do not need to specify transports. However,
6968 if such a router generated a host list, and callout was configured, Exim
6969 crashed, because it could not find a port number from the (non-existent)
6970 transport. It now assumes port 25 in this circumstance.
6972 21. Added the -t option to exigrep.
6974 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6975 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6976 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6977 them is set, LOOKUP_LSEARCH is forced.
6979 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6981 24. Added sender and host information to the "rejected by local_scan()" log
6982 line; previously there was no indication of these.
6984 25. Added .include_if_exists.
6986 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6987 Linux. It turns out that not all file systems support this. Apparently some
6988 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6989 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6990 not supported on the file descriptor, is now ignored when Exim is trying to
6991 sync a directory. This applies only to Linux.
6993 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6995 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6996 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6999 29. Added support for maildirsize files from supplied patch (modified a bit).
7001 30. The use of :fail: followed by an empty string could lead Exim to respond to
7002 sender verification failures with (e.g.):
7004 550 Verification failed for <xxx>
7005 550 Sender verify failed
7007 where the first response line was missing the '-' that indicates it is not
7008 the final line of the response.
7010 31. The loop for finding the name of the user that called Exim had a hardwired
7011 limit of 10; it now uses the value of finduser_retries, which is used for
7012 all other user lookups.
7014 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7017 33. Exim was neglecting to zero errno before one call of strtol() when
7018 expanding a string and expecting an integer value. On some systems this
7019 resulted in spurious "integer overflow" errors. Also, it was casting the
7020 result into an int without checking.
7022 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7023 did not work. The code looks as if it has *never* worked, though it appears
7024 to have been documented since at least release 1.62. I have made it work.
7026 35. The "timeout_DNS" error in retry rules, also documented since at least
7027 1.62, also never worked. As it isn't clear exactly what this means, and
7028 clearly it isn't a major issue, I have abolished the feature by treating it
7029 as "timeout", and writing a warning to the main and panic logs.
7031 36. The display of retry rules for -brt wasn't always showing the error code
7034 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7035 timeout_connect_A, timeout_connect_MX.
7037 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7038 to the empty sender.
7040 39. The daemon was not analysing the content of -oX till after it had closed
7041 stderr and disconnected from the controlling terminal. This meant that any
7042 syntax errors were only noted on the panic log, and the return code from
7043 the command was 0. By re-arranging the code a little, I've made the
7044 decoding happen first, so such errors now appear on stderr, and the return
7045 code is 1. However, the actual setting up of the sockets still happens in
7046 the disconnected process, so errors there are still only recorded on the
7049 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7050 connections (as happens on some IP stacks) was logged at start up time as
7051 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7052 it from "IPv6 and IPv4", which means that two separate sockets are being
7055 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7056 says whether AF_INET or AF_INET6 was passed as an argument.
7058 42. Exiwhat output was messed up when time zones were included in log
7061 43. Exiwhat now gives more information about the daemon's listening ports,
7062 and whether -tls-on-connect was used.
7064 44. The "port" option of the smtp transport is now expanded.
7066 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7067 silently ignored. Now an error message is written to the main and panic
7070 46. There's a new ACL modifier called "logwrite" which writes to a log file
7071 as soon as it is encountered.
7073 47. Added $local_user_uid and $local_user_gid at routing time.
7075 48. Exim crashed when trying to verify a sender address that was being
7078 49. Exim was recognizing only a space character after ".include". It now also
7079 recognizes a tab character.
7081 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7082 extracting the relevant information from the specification. The man page no
7083 longer contains scrambled data for the -d option, and I've added a section
7084 at the front about calling Exim under different names.
7086 51. Added "extra_headers" argument to the "mail" command in filter files.
7088 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7091 53. Installed eximstats 1.29.
7093 54. Added transport_filter_timeout as a generic transport option.
7095 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7096 Cc: header lines. This was required by RFC 822, but it not required by RFC
7099 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7100 incoming messages that did not have them. Now it does so only if the
7101 message originates locally, that is, if there is no associated remote host
7102 address. When Resent- header lines are present, this applies to the Resent-
7103 lines rather than the non-Resent- lines.
7105 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7106 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7108 58. Messages for configuration errors now include the name of the main
7109 configuration file - useful now that there may be more than one file in a
7110 list (.included file names were always shown).
7112 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7113 for those rare installations that do not start the daemon as root or run it
7114 setuid root. I've cut out the call to initgroups() if the daemon is not
7117 60. The Exim user and group can now be bound into the binary as text strings
7118 that are looked up at the start of Exim's processing.
7120 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7122 62. Added $mailstore_basename variable.
7124 63. Installed patch to sieve.c from Michael Haardt.
7126 64. When Exim failed to open the panic log after failing to open the main log,
7127 the original message it was trying to log was written to stderr and debug
7128 output, but if they were not available (the usual case in production), it
7129 was lost. Now it is written to syslog before the two lines that record the
7130 failures to open the logs.
7132 65. Users' Exim filters run in subprocesses under the user's uid. It is
7133 possible for a "deliver" command or an alias in a "personal" command to
7134 provoke an address rewrite. If logging of address rewriting is configured,
7135 this fails because the process is not running as root or exim. There may be
7136 a better way of dealing with this, but for the moment (because 4.30 needs
7137 to be released), I have disabled address rewrite logging when running a
7138 filter in a non-root, non-exim process.
7144 1. The buildconfig auxiliary program wasn't quoting the value set for
7145 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7146 not defined. This bug was masked in 4.22 by the effect that was fixed in
7149 2. Some messages that were rejected after a message id was allocated were
7150 shown as "incomplete" by exigrep. It no longer does this for messages that
7151 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7153 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7154 have allow_domain_literals set, the ID did not get logged in the <= line.
7155 Domain literals are now always recognized in Message-ID: header lines.
7157 4. The first argument for a ${extract expansion item is the key name or field
7158 number. Leading and trailing spaces in this item were not being ignored,
7159 causing some misleading effects.
7161 5. When deliver_drop_privilege was set, single queue runner processes started
7162 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7163 same command in the process it spins off) were not dropping privilege.
7165 6. When the daemon running as "exim" started a queue runner, it always
7166 re-executed Exim in the spun-off process. This is a waste of effort when
7167 deliver_drop_privilege is set. The new process now just calls the
7168 queue-runner function directly.
7174 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7177 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7178 ignored. Though the use of -oP was forcing the writing of a pid file, it
7179 was always written to the default place.
7181 3. If the message "no IP address found for host xxxx" is generated during
7182 incoming verification, it is now followed by identification of the incoming
7183 connection (so you can more easily find what provoked it).
7185 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7187 5. Added some features to "harden" Exim a bit more against certain attacks:
7189 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7190 be put in Local/Makefile. This is like the never_users runtime option,
7191 but it cannot be overridden. The default setting is "root".
7193 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7194 prefix string with which any file named in a -C command line option
7197 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7198 is retained for -C and -D only if the caller of Exim is root. Without
7199 it, the exim user may also use -C and -D and retain privilege.
7201 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7202 command line option is disabled.
7204 6. Macro names set by the -D option must start with an upper case letter, just
7205 like macro names defined in the configuration file.
7207 7. Added "dereference=" facility to LDAP.
7209 8. Two instances of the typo "uknown" in the source files are fixed.
7211 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7212 the Configure-Makefile script screwed up while processing it.
7214 10. Incorporated PCRE 4.4.
7216 11. The SMTP synchronization check was not operating right at the start of an
7217 SMTP session. For example, it could not catch a HELO sent before the client
7218 waited for the greeting. There is now a check for outstanding input at the
7219 point when the greeting is written. Because of the duplex, asynchronous
7220 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7221 way, but not yet received, when the check is performed.
7223 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7224 on TCP/IP sockets, because this apparently causes some broken clients to
7227 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7228 unchanged) from the Cygwin maintainer.
7230 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7231 was supported instead of testing for mbx. Effectively a typo.
7233 15. The spa authenticator server code was not checking that the input it
7234 received was valid base64.
7236 16. The debug output line for the "set" modifier in ACLs was not showing the
7237 name of the variable that was being set.
7239 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7241 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7242 lookup on its own. Something else was needed to trigger the lookup. For
7243 example, a match in host_lookup or the need for a host name in a host list.
7244 Now, if $sender_host_name is referenced and the host name has not yet been
7245 looked up, a lookup is performed. If the lookup fails, the variable remains
7246 empty, and $host_lookup_failed is set to "1".
7248 19. Added "eqi" as a case-independent comparison operator.
7250 20. The saslauthd authentication condition could segfault if neither service
7251 nor realm was specified.
7253 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7254 error message that was logged was misleading, and incoming SMTP
7255 connections were dropped. The message is now more accurate, and temporary
7256 errors are given to SMTP connections.
7258 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7259 (except RSET) with a 421 error, until QUIT is received. However, it was
7260 failing to send a response to QUIT.
7262 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7263 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7264 ACL is now run after the helo_try_verify_hosts code.
7266 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7267 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7268 case-independent, so other case variants are also recognized). Apparently
7269 some systems use these upper case variants.
7271 25. If more than two messages were waiting for the same host, and a transport
7272 filter was specified for the transport, Exim sent two messages over the
7273 same TCP/IP connection, and then failed with "socket operation on non-
7274 socket" when it tried to send the third.
7276 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7278 27. The extern definition of crypt16() in expand.c was not being excluded when
7279 the OS had its own crypt16() function.
7281 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7282 as a preferred synonym for return_size_limit, both as an option and as an
7285 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7287 30. Changed the default configuration ACL to relax the local part checking rule
7288 for addresses that are not in any local domains. For these addresses,
7289 slashes and pipe symbols are allowed within local parts, but the sequence
7290 /../ is explicitly forbidden.
7292 31. SPA server authentication was not clearing the challenge buffer before
7295 32. log_message in a "warn" ACL statement was writing to the reject log as
7296 well as to the main log, which contradicts the documentation and doesn't
7297 seem right (because no rejection is happening). So I have stopped it.
7299 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7300 However, I am unable to do any testing of this.
7302 34. Fixed an infelicity in the appendfile transport. When checking directories
7303 for a mailbox, to see if any needed to be created, it was accidentally
7304 using path names with one or more superfluous leading slashes; tracing
7305 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7307 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7308 contents are added to the log line that is written for every discarded
7309 recipient. (Previously a log_message setting was ignored.)
7311 36. The ${quote: operator now quotes the string if it is empty.
7313 37. The install script runs exim in order to find its version number. If for
7314 some reason other than non-existence or emptiness, which it checks, it
7315 could not run './exim', it was installing it with an empty version number,
7316 i.e. as "exim-". This error state is now caught, and the installation is
7319 38. An argument was missing from the function that creates an error message
7320 when Exim fails to connect to the socket for saslauthd authentication.
7321 This could cause Exim to crash, or give a corrupted message.
7323 39. Added isip, isip4, and isip6 to ${if conditions.
7325 40. The ACL variables $acl_xx are now saved with the message, and can be
7326 accessed later in routers, transports, and filters.
7328 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7329 strings in the file are not string-expanded.
7331 42. If a MAIL command specified a SIZE value that was too large to fit into an
7332 int variable, the check against message_size_limit failed. Such values are
7333 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7334 day this will have to be increased, but I don't think I want to be around
7335 when emails are that large.
7342 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7343 iconv() is not standard in FreeBSD.
7345 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7346 IPv6 enabled. The observed symptom was a segmentation fault on return from
7347 the function os_common_find_running_interfaces() in src/os.c.
7349 3. In the check_special_case() function in daemon.c I had used "errno" as an
7350 argument name, which causes warnings on some systems. This was basically a
7351 typo, since it was named "eno" in the comments!
7353 4. The code that waits for the clock to tick (at a resolution of some fraction
7354 of a second) so as to ensure message-id uniqueness was always waiting for
7355 at least one whole tick, when it could have waited for less. [This is
7356 almost certainly not relevant at current processor speeds, where it is
7357 unlikely to ever wait at all. But we try to future-proof.]
7359 5. The function that sleeps for a time interval that includes fractions of a
7360 second contained a race. It did not block SIGALRM between setting the
7361 timer, and suspending (a couple of lines later). If the interval was short
7362 and the sigsuspend() was delayed until after it had expired, the suspension
7363 never ended. On busy systems this could lead to processes getting stuck for
7366 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7367 process, before it forks any delivery processes. The open lookup caching
7368 mechanism meant that the open file or database connection was passed into
7369 the delivery process. The problem was that delivery processes always tidy
7370 up cached lookup data. This could cause a problem for the next delivery
7371 process started by the queue runner, because the external queue runner
7372 process does not know about the closure. So the next delivery process
7373 still has data in the lookup cache. In the case of a file lookup, there was
7374 no problem because closing a file descriptor in a subprocess doesn't affect
7375 the parent. However, if the lookup was caching a connection to a database,
7376 the connection was closed, and the second delivery process was likely to
7377 see errors such as "PGSQL: query failed: server closed the connection
7378 unexpectedly". The problem has been fixed by closing all cached lookups
7379 in a queue runner before running a delivery process.
7381 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7382 seem to have the "const" qualifier which it has on other OS. I've
7385 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7386 *of the same type* (client or server) with the same public name that an
7387 error should be diagnosed.
7389 9. When Exim looked up a host name for an IP address, but failed to find the
7390 original IP address when looking up the host name (a safety check), it
7391 output the message "<ip address> does not match any IP for NULL", which was
7392 confusing, to say the least. The bug was that the host name should have
7393 appeared instead of "NULL".
7395 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7396 user that is built into the binary, and the -C or -D options is used, root
7397 privilege is dropped before the configuration file is read. In addition,
7398 logging is switched to stderr instead of the normal log files. If the
7399 configuration then re-defines the Exim user, the unprivileged environment
7400 is probably not what is expected, so Exim logs a panic warning message (but
7403 However, if deliver_drop_privilege is set, the unprivileged state may well
7404 be exactly what is intended, so the warning has been cut out in that case,
7405 and Exim is allowed to try to write to its normal log files.
7411 1. smtp_return_error_details was not giving details for temporary sender
7412 or receiver verification errors.
7414 2. Diagnose a configuration error if two authenticators have the same public
7417 3. Exim used not to create the message log file for a message until the first
7418 delivery attempt. This could be confusing when incoming messages were held
7419 for policy or load reasons. The message log file is now created at the time
7420 the message is received, and an initial "Received" line is written to it.
7422 4. The automatically generated man page for command line options had a minor
7423 bug that caused no ill effects; however, a more serious problem was that
7424 the procedure for building the man page automatically didn't always
7425 operate. Consequently, release 4.20 contains an out-of-date version. This
7426 shouldn't happen again.
7428 5. When building Exim with embedded Perl support, the script that builds the
7429 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7430 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7432 6. The freeze_tell option was not being used for messages that were frozen on
7433 arrival, either by an ACL or by local_scan().
7435 7. Added the smtp_incomplete_transaction log selector.
7437 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7438 was accepting AUTH without a new EHLO.
7440 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7441 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7444 10. Logging of TCP/IP connections (when configured) now happens in the main
7445 daemon process instead of the child process, so that the TCP/IP connection
7446 count is more accurate (but it can never be perfect).
7448 11. The use of "drop" in a nested ACL was not being handled correctly in the
7449 outer ACL. Now, if condition failure induced by the nested "drop" causes
7450 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7451 or "require"), the connection is dropped.
7453 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7454 that yield "discard" can now be used with an "accept" or a "discard" verb,
7455 but an error is generated for any others (because I can't see a useful way
7456 to define what should happen).
7458 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7459 are now processed in the same way as lines in the Exim configuration file.
7460 In particular, continuation lines are supported.
7462 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7464 15. Added -ti meaning -t -i.
7466 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7467 domains, and warn by logging if others are found.
7469 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7470 returned from GIFCONF when Exim is trying to find the list of interfaces on
7471 a host. The code in os.c has been modified to copy each ifreq to an aligned
7472 structure in all cases.
7474 Also, in some cases, the returned ifreq's were being copied to a 'struct
7475 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7476 means the last couple of bytes of an IPv6 address could be chopped if the
7477 ifreq contained only a normal sockaddr (14 bytes storage).
7479 18. Named domain lists were not supported in the hosts_treat_as_local option.
7480 An entry such as +xxxx was not recognized, and was treated as a literal
7483 19. Ensure that header lines added by a DATA ACL are included in the reject log
7484 if the ACL subsequently rejects the message.
7486 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7487 MD5 (which is deprecated).
7489 21. When testing a filter file using -bf, Exim was writing a message when it
7490 took the sender from a "From " line in the message, but it was not doing so
7491 when it took $return_path from a Return-Path: header line. It now does.
7493 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7494 with a valid header line field name (a series of printing characters
7495 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7497 23. Changed "disc" in the source to "disk" to conform to the documentation and
7498 the book and for uniformity.
7500 24. Ignore Sendmail's -Ooption=value command line item.
7502 25. When execve() failed while trying to run a command in a pipe transport,
7503 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7504 could be confused with a return value of 69 from the command itself. This
7505 has been changed to 127, the value the shell returns if it is asked to run
7506 a non-existent command. The wording for the related log line suggests a
7507 non-existent command as the problem.
7509 26. If received_header_text expands to an empty string, do not add a Received:
7510 header line to the message. (Well, it adds a token one on the spool, but
7511 marks it "old" so that it doesn't get used or transmitted.)
7513 27. Installed eximstats 1.28 (addition of -nt option).
7515 28. There was no check for failure on the call to getsockname() in the daemon
7516 code. This can fail if there is a shortage of resources on the system, with
7517 ENOMEM, for example. A temporary error is now given on failure.
7519 29. Contrary to the C standard, it seems that in some environments, the
7520 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7521 program. Exim now does this explicitly; it affects the formatting of
7522 timestamps using strftime().
7524 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7525 complaints. I've now initialized all the variables, to avoid this.
7527 32. Header lines added by a system filter were not being "seen" during
7528 transport-time rewrites.
7530 33. The info_callback() function passed to OpenSSL is set up with type void
7531 (*)(SSL *, int, int), as described somewhere. However, when calling the
7532 function (actually a macro) that sets it up, the type void(*)() is
7533 expected. I've put in a cast to prevent warnings from picky compilers.
7535 34. If a DNS black list lookup found a CNAME record, but there were no A
7536 records associated with the domain it pointed at, Exim crashed.
7538 35. If a DNS black list lookup returned more than one A record, Exim ignored
7539 all but the first. It now scans all returned addresses if a particular IP
7540 value is being sought. In this situation, the contents of the
7541 $dnslist_value variable are a list of all the addresses, separated by a
7544 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7545 to accept a host name and all its aliases if the forward lookup for any of
7546 them yielded the IP address of the incoming connection. Now it accepts only
7547 those names whose forward lookup yields the correct IP address. Any other
7548 names are discarded. This closes a loophole whereby a rogue DNS
7549 administrator could create reverse DNS records to break through a
7550 wildcarded host restriction in an ACL.
7552 37. If a user filter or a system filter that ran in a subprocess used any of
7553 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7554 the wrong values were passed to the pipe command ($thisaddress had the
7555 value of $0, $0 had the value of $1, etc). This bug was introduced by
7556 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7558 38. Improved the line breaking for long SMTP error messages from ACLs.
7559 Previously, if there was no break point between 40 and 75 characters, Exim
7560 left the rest of the message alone. Two changes have been made: (a) I've
7561 reduced the minimum length to 35 characters; (b) if it can't find a break
7562 point between 35 and 75 characters, it looks ahead and uses the first one
7563 that it finds. This may give the occasional overlong line, but at least the
7564 remaining text gets split now.
7566 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7567 file descriptors might be low, and that setting 1000 would always raise it.
7568 It turns out that in some environments, the limit is already over 1000 and
7569 that lowering it causes trouble. So now Exim takes care not to decrease it.
7571 40. When delivering a message, the value of $return_path is set to $sender_
7572 address at the start of routing (routers may change the value). By an
7573 oversight, this default was not being set up when an address was tested by
7574 -bt or -bv, which affected the outcome if any router or filter referred to
7577 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7578 log only when "message" or "log_message" are set. However, if one of the
7579 conditions was an address verification, or a call to a nested ACL, the
7580 messages generated by the underlying test were being passed through. This
7581 no longer happens. The underlying message is available in $acl_verify_
7582 message for both "message" and "log_message" expansions, so it can be
7583 passed through if needed.
7585 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7586 new expansion $bh_ to give the encoded byte string without charset
7587 translation. Translation happens only if iconv() is available; HAVE_ICONV
7588 indicates this at build time. HEADERS_CHARSET gives the charset to
7589 translate to; headers_charset can change it in the configuration, and
7590 "headers charset" can change it in an individual filter file.
7592 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7593 that creates RFC 2047 encoded "words" labels them as that charset instead
7594 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7595 expansion operator; (ii) when Exim creates a From: line for a local
7596 message; (iii) when a header line is rewritten to include a "phrase" part.
7598 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7599 buggy, causing it to skip the first lines of messages whose message ID
7600 ended in 'D'. This would not have bitten before Exim release 4.14, because
7601 message IDs were unlikely to end in 'D' before then. The effect was to have
7602 incorrect size information for certain domains.
7604 45. #include "config.h" was missing at the start of the crypt16.c module. This
7605 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7608 46. If there was a timeout during a "random" callout check, Exim treated it as
7609 a failure of the random address, and carried on sending RSET and the real
7610 address. If the delay was just some slowness somewhere, the response to the
7611 original RCPT would be taken as a response to RSET and so on, causing
7612 mayhem of various kinds.
7614 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7615 when I implemented it. It didn't allow for the fact that some option values
7616 may legitimately be negative (e.g. size_addition), and it didn't even do
7617 the right test for positive values.
7619 48. Domain names in DNS records are case-independent. Exim always looks them up
7620 in lower case. Some resolvers return domain names in exactly the case they
7621 appear in the zone file, that is, they may contain uppercase letters. Not
7622 all resolvers do this - some return always lower case. Exim was treating a
7623 change of case by a resolver as a change of domain, similar to a widening
7624 of a domain abbreviation. This triggered its re-routing code and so it was
7625 trying to route what was effectively the same domain again. This normally
7626 caused routing to fail (because the router wouldn't handle the domain
7627 twice). Now Exim checks for this case specially, and just changes the
7628 casing of the domain that it ultimately uses when it transmits the message
7631 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7634 50. If a filter generated a file delivery with a non-absolute name (possible if
7635 no home directory exists for the router), the forbid_file option was not
7638 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7639 the existing equality matching.
7641 52. Exim was using ints instead of ino_t variables in some places where it was
7642 dealing with inode numbers.
7644 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7645 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7646 called TMPDIR, and if it finds it is different, it changes its value.
7648 54. The smtp_printf() function is now made available to local_scan() so
7649 additional output lines can be written before returning. There is also an
7650 smtp_fflush() function to enable the detection of a dropped connection.
7651 The variables smtp_input and smtp_batched_input are exported to
7654 55. Changed the default runtime configuration: the message "Unknown user"
7655 has been removed from the ACL, and instead placed on the localuser router,
7656 using the cannot_route_message feature. This means that any verification
7657 failures that generate their own messages won't get overridden. Similarly,
7658 the "Unrouteable address" message that was in the ACL for unverifiable
7659 relay addresses has also been removed.
7661 56. Added hosts_avoid_esmtp to the smtp transport.
7663 57. The exicyclog script was not checking for the esoteric option
7664 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7665 will work only if exicyclog is run under the appropriate euid.
7667 58. Following a discussion on the list, the rules by which Exim recognises line
7668 endings on incoming messages have been changed. The -dropcr and drop_cr
7669 options are now no-ops, retained only for backwards compatibility. The
7670 following line terminators are recognized: LF CRLF CR. However, special
7671 processing applies to CR:
7673 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7674 nor a local message in the state where . is a terminator.
7676 (ii) If a bare CR is encountered in a header line, an extra space is added
7677 after the line terminator so as not to end the header. The reasoning
7678 behind this is that bare CRs in header lines are most likely either
7679 to be mistakes, or people trying to play silly games.
7681 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7682 was being incorrectly given as 18 bytes larger than it should have been.
7683 This is a VOB (very old bug).
7685 60. This may never have affected anything current, but just in case it has:
7686 When the local host is found other than at the start of a list of hosts,
7687 the local host, those with the same MX, and any that follow, are discarded.
7688 When the list in question was part of a longer list of hosts, the following
7689 hosts (not currently being processed) were also being discarded. This no
7690 longer happens. I'm not sure if this situation could ever has previously
7693 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7696 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7697 header. This is something that is recommended in a new Internet Draft, and
7698 is something that is documented as being done by Sendmail. There are two
7699 possible values. For messages generated by the autoreply transport, Exim
7702 Auto-Submitted: auto-replied
7704 whereas for all other generated messages (e.g. bounces) it adds
7706 Auto-Submitted: auto-generated
7708 63. The "personal" condition in filters now includes a test for the
7709 Auto-Submitted: header. If it contains the string "auto-" the message it
7710 not considered personal.
7712 64. Added rcpt_include_affixes as a generic transport option.
7714 65. Added queue_only_override (default true).
7716 66. Added the syslog_duplication option.
7718 67. If what should have been the first header line of a message consisted of
7719 a space followed by a colon, Exim was mis-interpreting it as a header line.
7720 It isn't of course - it is syntactically invalid and should therefore be
7721 treated as the start of the message body. The misbehaviour could have
7722 caused a number of strange effects, including loss of data in subsequent
7723 header lines, and spool format errors.
7725 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7726 client host had authenticated. This control can now be exercised by an ACL
7727 for more flexibility.
7729 69. By default, callouts do not happen when testing with -bh. There is now a
7730 variant, -bhc, which does actually run the callout code, including
7731 consulting and updating the callout cache.
7733 70. Added support for saslauthd authentication, courtesy of Alexander
7736 71. If statvfs() failed on the spool or log directories while checking their
7737 size for availability, Exim confusingly gave the error "space shortage".
7738 Furthermore, in debugging mode it crashed with a floating point exception.
7739 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7740 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7741 serious problem, Exim now writes to the main and panic logs when this
7742 happens, with details of the failure. It then refuses to accept the
7743 incoming message, giving the message "spool directory problem" or "log
7744 directory problem" with a 421 code for SMTP messages.
7746 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7747 0, 1, and 2 exist, because some OS complain for execs without them (see
7748 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7749 descriptors. However, the code omitted to check that the open succeeded,
7750 causing mysterious errors if for some reason the permissions on /dev/null
7751 got screwed. Now Exim writes a message to the main and panic logs, and
7752 bombs out if it can't open /dev/null.
7754 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7755 interact so that it is all more flexible. It is supposed to remain
7756 backwards compatible. Also added extra_local_interfaces.
7758 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7759 to bomb out with an assertion failure - to the client this appears as a
7760 connection drop. This problem occurs in the part of the code that was taken
7761 from the Samba project. Fortunately, the assertion is in a very simple
7762 function, so I have fixed this by reproducing the function inline in the
7763 one place where it is called, and arranging for authentication to fail
7764 instead of killing the process with assert().
7766 75. The SPA client code was not working when the server requested OEM rather
7767 than Unicode encoding.
7769 76. Added code to make require_files with a specific uid setting more usable in
7770 the case where statting the file as root fails - usually a non-root-mounted
7771 NFS file system. When this happens and the failure is EACCES, Exim now
7772 forks a subprocess and does the per-uid checking as the relevant uid.
7774 77. Added process_log_path.
7776 78. If log_file_path was not explicitly set, a setting of check_log_space or
7777 check_log_inodes was ignored.
7779 79. If a space check for the spool or log partitions fails, the incident is now
7780 logged. Of course, in the latter case the data may get lost...
7782 80. Added the %p formatting code to string_format() so that it can be used to
7783 print addresses in debug_print(). Adjusted all the address printing in the
7784 debugging in store.c to use %p rather than %d.
7786 81. There was a concern that a line of code in smtp_in.c could overflow a
7787 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7788 initially expressed, the concern was not well-founded, because trailing
7789 spaces are removed early. However, if the trailing spaces were followed by
7790 a NULL, they did not get removed, so the overflow was possible. Two fixes
7793 (a) I re-wrote the offending code in a cleaner fashion.
7794 (b) If an incoming SMTP command contains a NULL character, it is rejected
7797 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7798 runs initgroups(), so that if the Exim user is in any additional groups,
7799 they will be used during message reception.
7805 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob