1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
66 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
67 excluded, not matching the documentation.
69 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
70 was given for the sqlite_dbfile a trap resulted.
72 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
73 "name" argument resulted in a trap. There is no reason to disallow such;
74 this was a coding error.
76 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
77 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
78 spent suspended, ignoring the Posix definition. Previously we assumed
79 it did and a constant offset from real time could be used as a correction.
80 Change to using the same clock source for the start-of-message and the
81 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
82 exists, just to get a clock slightly more aligned to reality.
84 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
85 RFC says it is optional some validators care. The missing char was not
86 intended but triggered by a line-wrap alignement. Discovery and fix by
87 Guillaume Outters, hacked on by JH.
89 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
90 name being quoted was tainted a trap would be taken. Fix by using
91 dynamicaly created buffers. The routine could have been called by a
92 rewrite with the "h" flag, by using the "-F" command-line option, or
93 by using a "name=" option on a control=submission ACL modifier.
95 JH/19 SPF: change the Authentication-Results expansion component to give
96 smtp.helo when the sender domain is empty. Previously it gave
99 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
100 not in 127.0.0.0/8 to help in spotting list domains taken over by a
101 domain-parking registrar.
103 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
104 Previously when a whitespace character was specified it was not inserted
105 after removing the newline.
107 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
108 the domain part of the recipient address. This overrides any tls_sni
109 option set, which was previously used.
111 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
118 JH/01 Avoid costly startup code when not strictly needed. This reduces time
119 for some exim process initialisations. It does mean that the logging
120 of TLS configuration problems is only done for the daemon startup.
122 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
124 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
125 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
128 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
129 DKIM signing is being done. Previously a transport_filter would always
130 disable CHUNKING, falling back to traditional DATA.
132 JH/05 Regard command-line receipients as tainted.
134 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
136 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
137 PAM library frees one of the arguments given to it, despite the
138 documentation. Therefore a plain malloc must be used.
140 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
141 on-stack buffers were used, resulting in a taint trap when DSN information
142 copied from a received message was written into the buffer.
144 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
145 the ordering of its ARC headers. This caused a crash.
147 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
148 a new record was being constructed with information from the peer, a trap
151 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
152 installation would get error messages from DMARC verify, when it hit the
153 nonexistent file indicated by the default. Distros wanting DMARC enabled
154 should both provide the file and set the option.
155 Also enforce no DMARC verification for command-line sourced messages.
157 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
158 could, depending on the platform, hang at the STARTTLS response.
160 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
161 message on a connection. Previously if one message had ARC headers and
162 the following one did not, a crash could result when adding an
163 Authentication-Results: header.
165 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
166 Exim main code and Exim-related utities. The introduction of taint
167 tracking also did many adjustments to string handling. Since then, eximon
168 frequently terminated with an assert failure.
170 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
171 check for 452 responses. This slightly helps the inefficieny of doing
172 a large alias-expansion into a recipient-limited target. The max_rcpt
173 transport option still applies (and at the current default, will override
174 the new feature). The check is done for either cause of synch, and forces
175 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
176 connection. The new facility is not tunable at this time.
178 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
179 library live data was being used, so the results became garbage. Make
180 copies while it is still usable.
182 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
183 on delivery deferred (==) and failed (**) lines (if a delivery was
184 attemtped). Previously it was only on completion (=>) lines.
186 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
187 for the expansion of the server_scram_iter and server_scram_salt options.
189 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
190 are now specifically given a NO_DATA response without hitting the system
191 resolver. The library goes on to do the now-standard TXT lookup.
192 Use of dnsdb lookups is not affected.
194 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
195 only retrieve the errormessage once. Previously two calls to dlerror()
196 were used, and the second one (for mainlog/paniclog) retrieved null
199 JH/20 Taint checking: disallow use of tainted data for
200 - the appendfile transport file and directory options
201 - the pipe transport command
202 - the autoreply transport file, log and once options
203 - file names used by the redirect router (including filter files)
205 - paths used by single-key lookups
206 Previously this was permitted.
208 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
209 adjusted the size of a major service buffer; this failed because the
210 buffer was in use at the time. Change to a compile-time increase in the
211 buffer size, when this authenticator is compiled into exim.
213 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
214 previous fast-mode was untenable in the face of glibs using mmap to
215 support larger malloc requests.
217 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
218 New values supported, if defined on system where compiled:
219 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
220 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
222 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
223 running a limited number of proceses in parallel, a benefit is gained. The
224 amount varies with the platform hardware and load. The use of the option
225 queue_run_in_order means we cannot do this, as ordering becomes
228 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
229 had introduced a string-copy (for ensuring NUL-termination) which was not
230 appropriate for that case, which can include embedded NUL bytes in the
231 block of data. Investigation showed the copy to actually be needless, the
232 data being length-specified.
234 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
235 done during a receiving connection, and both used TLS, global info was
236 used rather than per-connection info for tracking the state of data
237 queued for transmission. This could result in a connection hang.
239 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
240 Previously, when delivering serveral messages down a single connection
241 only the first would provide a SIZE. This was due to the size information
242 not being properly tracked.
244 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
245 TAI (at 37 seconds currently), pretend to be in UTC for time-related
246 expansion and logging. Previously, spurious values such as a future
247 minute could be seen.
249 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
250 it could crash from a null-deref. This could also affect the
251 ${addresses: } operator and ${readsock } item.
253 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
254 message following a mime one, the variable was not reset.
256 JH/30 When an pipelined-connect fails at the first response, assume incorrect
257 cached capability (perhaps the peer reneged?) and immediately retry in
260 JH/31 Fix spurious detection of timeout while writing to transport filter.
262 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
263 an attempt to copy the string was made before checking it.
265 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
266 taint of the lookup key was maintained; we now regard the presence in the
267 filesystem as sufficient validation.
269 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
270 argument is supplied.
272 JH/35 The dsearch lookup now requires that the directory is an absolute path.
273 Previously this was not checked, and nonempty relative paths made an
274 access under Exim's current working directory.
276 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
277 Previously no event was raised.
279 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
280 parameter supplied by the sender MAIL FROM command. Previously it was
281 ignored, and only the check_spool_space option value for the required
284 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
285 the size of the signing public-key. Previously it was instead giving
286 the size of the signature hash.
288 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
289 the default. See the (new) dkim_verify_min_keysizes option.
291 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
292 and an ACL use a lookup for checking either the local_part or domain,
293 stale data could be accessed. Ensure that variable references are
294 dropped between messages.
296 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
297 by the client was not checked as pointing within response data before
298 being used. A malicious client could thus cause an out-of-bounds read and
299 possibly gain authentication. Fix by adding the check.
301 JH/42 Internationalisation: change the default for downconversion in the smtp
302 transport to be "if needed". Previously it was "as previously set" for
303 the message, which usually meant "if needed" for message-submission but
304 "no" for everything else. However, MTAs have been seen using SMTPUTF8
305 even when the envelope addresses did not need it, resulting in forwarding
306 failures to non-supporting MTAs. A downconvert in such cases will be
307 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
308 transport. The change does mean that addresses needing conversion will
309 be converted when previously a delivery failure would occur.
311 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
312 response was received it would be used unchecked in a fail-DSN, violating
313 standards on line-length limits. Truncate if needed.
315 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
316 doesn't work. (Additionally add a new main config option to configure the
323 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
324 side, to decode a TLS 1.3 packet capture.
326 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
327 Previously the default library behaviour applied, sending two, each in
330 JH/03 Debug output for ACL now gives the config file name and line number for
333 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
335 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
337 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
338 buffer overrun for (non-chunking) other transports.
340 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
341 TLS1.3, means that a server rejecting a client certificate is not visible
342 to the client until the first read of encrypted data (typically the
343 response to EHLO). Add detection for that case and treat it as a failed
344 TLS connection attempt, so that the normal retry-in-clear can work (if
345 suitably configured).
347 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
348 and/or domain. Found and fixed by Jason Betts.
350 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
351 configuration). If a CNAME target was not a wellformed name pattern, a
354 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
355 the OS reports them interleaved with other addresses.
357 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
358 used both for input and for a verify callout, both encrypted, SMTP
359 responses being sent by the server could be lost. This resulted in
360 dropped connections and sometimes bounces generated by a peer sending
363 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
364 string. Previously it was possible to cause undefined behaviour in a
365 library routine (usually a crash). Found by "zerons".
367 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
370 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
371 API was removed, so update to use the newer ones.
373 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
374 any timeout set, is taking a long time. Previously we would hang on to a
375 rotated logfile "forever" if the input was arriving with long gaps
376 (a previous attempt to fix addressed lack, for a long time, of initial
379 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
380 shared (NFS) environment. The length of the tempfile name is now
381 4 + 16 ("hdr.$message_exim_id") which might break on file
382 systems which restrict the file name length to lower values.
385 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
386 shared (NFS) environment.
388 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
389 did for all versions <4.90). Notably -M, -m, --invert, -I may be
392 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
393 on some platforms for bit 31.
395 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
396 to changes apparently associated with TLS1.3 handling some of the APIs
397 previously used were either nonfunctional or inappropriate. Strings
398 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
399 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
400 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
401 This affects log line X= elements, the $tls_{in,out}_cipher variables,
402 and the use of specific cipher names in the encrypted= ACL condition.
404 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
406 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
407 verification result was not updated unless hosts_require_ocsp applied.
409 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
410 queue_list_requires_admin set to false, non-admin users were denied the
413 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
414 directory-of-certs mode. Previously they were advertised despite the
417 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
418 A single TCP connection by a client will now hold a TLS connection open
419 for multiple message deliveries, by default. Previously the default was to
422 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
423 default. If built with the facility, DANE will be used. The facility
424 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
426 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
427 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
428 must be defined and you must still, unless you define DISABLE_TLS, manage
429 the the include-dir and library-file requirements that go with that
430 choice. Non-TLS builds are still supported.
432 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
435 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
436 default. If the platform supports and has the facility enabled, it will
437 be requested on all coneections.
439 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
440 controlled by the build-time option SUPPORT_PIPE_CONNECT.
442 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
444 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
445 success-DSN messages. Previously the From: header was always the default
446 one for these; the option was ignored.
448 JH/28 Fix the timeout on smtp response to apply to the whole response.
449 Previously it was reset for every read, so a teergrubing peer sending
450 single bytes within the time limit could extend the connection for a
451 long time. Credit to Qualsys Security Advisory Team for the discovery.
453 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
454 delivery address, which leaked information of the results of local
455 forwarding. Change to the original envelope recipient address, per
458 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
459 requested. Previously not bounce was generated and a log entry of
460 error ignored was made.
462 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
464 JH/32 Introduce a general tainting mechanism for values read from the input
465 channel, and values derived from them. Refuse to expand any tainted
466 values, to catch one form of exploit.
468 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
469 was unused and the unexpanded text used for the test. Found and
470 fixed by Ruben Jenster.
472 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
473 an attempt to use a TLS library read routine dereffed a nul pointer,
476 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
477 them in our smtp response.
479 JH/36 Have the general router option retry_use_local_part default to true when
480 any of the restrictive preconditions are set (to anything). Previously it
481 was only for check_local user. The change removes one item of manual
482 configuration which is required for proper retries when a remote router
483 handles a subset of addresses for a domain.
485 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
486 link count into consideration.
488 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
489 caused the extension of big_buffer, the following lines were ignored.
491 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
492 accordance with RFC 2308. Previously there was no expiry, so a longlived
493 receive process (eg. due to ACL delays) versus a short SOA value could
496 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
498 JH/39 Promote DMARC support to mainline.
500 JH/40 Bug 2452: Add a References: header to DSNs.
502 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
503 parameters. The relevant library call is documented as "Deprecated: This
504 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
505 3.6.0, DH parameters are negotiated following RFC7919."
507 HS/06 Change the default of dnssec_request_domains to "*"
509 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
510 carried on and emitted a BDAT command, even when PIPELINING was not
513 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
514 buffer was used for the filename, resulting in a trap when tainted
515 arguments (eg. $domain) were used.
517 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
518 recommended to avoid a possible server-load attack. The feature can be
519 re-enabled via the openssl_options main cofiguration option.
521 JH/45 local_scan API: documented the current smtp_printf() call. This changed
522 for version 4.90 - adding a "more data" boolean to the arguments.
523 Bumped the ABI version number also, this having been missed previously;
524 release versions 4.90 to 4.92.3 inclusive were effectively broken in
525 respect of usage of smtp_printf() by either local_scan code or libraries
526 accessed via the ${dlfunc } expansion item. Both will need coding
527 adjustment for any calls to smtp_printf() to match the new function
528 signature; a FALSE value for the new argument is always safe.
530 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
531 the file-offset (which the Linux syscall does, and exim expects); this
532 resulted in an indefinite loop.
534 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
535 to do ARC verification. The Authentication-Results: header line added
536 by the configuration then had no ARC item.
542 JH/01 Remove code calling the customisable local_scan function, unless a new
543 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
545 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
546 non-signal-safe functions being used.
548 JH/03 Bug 2269: When presented with a received message having a stupidly large
549 number of DKIM-Signature headers, disable DKIM verification to avoid
550 a resource-consumption attack. The limit is set at twenty.
552 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
553 report of oldest_pass in ${authres } in consequence, and separate out
554 some descriptions of reasons for verification fail.
556 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
557 files in the spool were present and unlocked. A queue-runner could spot
558 them, resulting in a duplicate delivery. Fix that by doing the unlock
559 after the unlink. Investigation by Tim Stewart. Take the opportunity to
560 add more error-checking on spoolfile handling while that code is being
563 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
564 No known attacks, no CVE, this is defensive hardening.
566 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
567 a queue-runner could start a delivery while other operations were ongoing.
568 Cutthrough delivery was a common victim, resulting in duplicate delivery.
569 Found and investigated by Tim Stewart. Fix by using the open message data
570 file handle rather than opening another, and not locally closing it (which
571 releases a lock) for that case, while creating the temporary .eml format
572 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
574 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
575 $sender_verify_failure/$recipient_verify_failure to "random".
577 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
580 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
581 Previously this would segfault.
583 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
586 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
587 like zero, since the resolver should be doing this for us, But we need one
588 as a CNAME but no MX presence gets the CNAME returned; we need to check
589 that doesn't point to an MX to declare it "no MX returned" rather than
590 "error, loop". A new main option is added so the older capability of
591 following some limited number of chain links is maintained.
593 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
595 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
596 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
597 now-deprecated earlier definitions used only specified the range up to TLS
598 1.2 (in the older-version library docs).
600 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
602 JH/15 Rework TLS client-side context management. Stop using a global, and
603 explicitly pass a context around. This enables future use of TLS for
604 connections to service-daemons (eg. malware scanning) while a client smtp
605 connection is using TLS; with cutthrough connections this is quite likely.
607 JH/16 Fix ARC verification to do AS checks in reverse order.
609 JH/17 Support a "tls" option on the ${readsocket } expansion item.
611 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
612 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
613 Previously the "utf8" would be re-prepended for every additional message.
615 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
616 Previously thery were accepted, resulting in issues when attempting to
617 forward messages to a non-supporting MTA.
619 PP/02 Let -n work with printing macros too, not just options.
621 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
622 one parent address was copied, and bogus data was used at delivery-logging
623 time. Either a crash (after delivery) or bogus log data could result.
624 Discovery and analysis by Tim Stewart.
626 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
627 Previously if the string ended mid-character, we did not insert the
628 promised '?' replacement.
630 PP/04 Documentation: current string operators work on bytes, not codepoints.
632 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
633 should pack well giving a smaller memory footprint so better caching and
634 therefore performance. Group the declarations where this can't be done so
635 that the byte-sized flag variables are not interspersed among pointer
636 variables, giving a better chance of good packing by the compiler.
638 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
639 non-null, to avoid issues with sites running BATV. Previously reports were
640 sent with an empty envelope sender so looked like bounces.
642 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
643 The ignore_error flag wasn't being returned from the filter subprocess so
644 was not set for later routers. Investigation and fix by Matthias Kurz.
646 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
647 and a msg:complete for the whole, when a message is manually removed using
648 -Mrm. Developement by Matthias Kurz, hacked on by JH.
650 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
651 a "Gnu special" function, asprintf() in the DB utility binary builds; I
652 hope that is portable enough.
654 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
655 requiring a known-CA anchor certificate; make it now rely entirely on the
656 TLSA as an anchor. Checking the name on the leaf cert against the name
657 on the A-record for the host is still done for TA (but not for EE mode).
659 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
660 included in delivery lines for non-proxied connections, when compiled with
661 SUPPORT_SOCKS and running with proxy logging enabled.
663 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
664 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
665 move the existing event to fire before the normal logging of message
666 failure so that custom logging is bracketed by normal logging.
668 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
669 msg:fail:internal event. Developement by Matthias Kurz.
671 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
672 far too small for todays use of crypto signatures stored there. Go all
673 the way to the max DNS message size of 64kB, even though this might be
674 overmuch for IOT constrained device use.
676 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
677 copy a string over itself. The library routine is documented as not
678 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
680 JH/32 For main options check_spool_space and check_inode_space, where the
681 platform supports 64b integers, support more than the previous 2^31 kB
682 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
683 the previous G, M, k.
685 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
686 $authenticated_fail_id variable on authentication failure. Previously
689 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
690 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
691 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
692 GNUTLS_SEC_PARAM_MEDIUM.
694 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
695 side. Previously we would continue as if no SNI had been received.
697 JH/36 Harden the handling of string-lists. When a list consisted of a sole
698 "<" character, which should be a list-separator specification, we walked
699 off past the nul-terimation.
701 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
702 causes) even when the retry time is not yet met. Previously they were
703 not, meaning that when (say) an account was over-quota and temp-rejecting,
704 and multiple senders' messages were queued, only one sender would get
705 notified on each configured delay_warning cycle.
707 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
709 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
710 cipher-suites, an error can be left on the stack even for a succeeding
711 accept; this results in impossible error messages when a later operation
714 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
715 return error codes indicating retry. Under TLS1.3 this becomes required.
717 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
718 it only wrote the new authenticators, resulting in a lack of tracking of
719 peer changes of ESMTP extensions until the next cache flush.
721 JH/41 Fix the loop reading a message header line to check for integer overflow,
722 and more-often against header_maxsize. Previously a crafted message could
723 induce a crash of the recive process; now the message is cleanly rejected.
725 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
726 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
732 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
733 When redis_servers is set to a list of > 1 element, and the Redis servers
734 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
735 case of MOVED into a DEFER case instead, thus moving the query onto the
736 next server in the list. For a cluster of N elements, all N servers must
737 be defined in redis_servers.
739 GF/02 Catch and remove uninitialized value warning in exiqsumm
740 Check for existence of @ARGV before looking at $ARGV[0]
742 JH/01 Replace the store_release() internal interface with store_newblock(),
743 which internalises the check required to safely use the old one, plus
744 the allocate and data copy operations duplicated in both (!) of the
745 extant use locations.
747 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
748 modifier. This matches the restriction on the commandline.
750 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
751 Previously only the last row was returned.
753 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
754 we assumed that tags in the header were well-formed, and parsed the
755 element content after inspecting only the first char of the tag.
756 Assumptions at that stage could crash the receive process on malformed
759 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
760 While running the DKIM ACL we operate on the Permanent memory pool so that
761 variables created with "set" persist to the DATA ACL. Also (at any time)
762 DNS lookups that fail create cache records using the Permanent pool. But
763 expansions release any allocations made on the current pool - so a dnsdb
764 lookup expansion done in the DKIM ACL releases the memory used for the
765 DNS negative-cache, and bad things result. Solution is to switch to the
766 Main pool for expansions.
767 While we're in that code, add checks on the DNS cache during store_reset,
768 active in the testsuite.
769 Problem spotted, and debugging aided, by Wolfgang Breyha.
771 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
772 When none of the hosts presented to a transport match an already-open
773 connection, close it and proceed with the list. Previously we would
774 queue the message. Spotted by Lena with Yahoo, probably involving
777 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
778 Previously a spurious "250 OK id=" response was appended to the proper
781 JH/08 The "support for" informational output now, which built with Content
782 Scanning support, has a line for the malware scanner interfaces compiled
783 in. Interface can be individually included or not at build time.
785 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
786 by the template makefile "src/EDITME". The "STREAM" support for an older
787 ClamAV interface method is removed.
789 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
790 rows affected is given instead).
792 JH/11 The runtime Berkeley DB library version is now additionally output by
793 "exim -d -bV". Previously only the compile-time version was shown.
795 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
796 SMTP connection. Previously, when one had more receipients than the
797 first, an abortive onward connection was made. Move to full support for
798 multiple onward connections in sequence, handling cutthrough connection
799 for all multi-message initiating connections.
801 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
802 routers. Previously, a multi-recipient message would fail to match the
803 onward-connection opened for the first recipient, and cause its closure.
805 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
806 a timeout on read on a GnuTLS initiating connection, resulting in the
807 initiating connection being dropped. This mattered most when the callout
808 was marked defer_ok. Fix to keep the two timeout-detection methods
811 JH/15 Relax results from ACL control request to enable cutthrough, in
812 unsupported situations, from error to silently (except under debug)
813 ignoring. This covers use with PRDR, frozen messages, queue-only and
816 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
818 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
819 metadata, resulting in a crash in free().
821 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
822 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
823 Broken also in d185889f4, with init system revamp.
825 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
826 Previously we abruptly closed the connection after reading a malware-
827 found indication; now we go on to read the "scan ok" response line,
830 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
831 ACL. Previously, a crash would result.
833 JH/19 Speed up macro lookups during configuration file read, by skipping non-
834 macro text after a replacement (previously it was only once per line) and
835 by skipping builtin macros when searching for an uppercase lead character.
837 JH/20 DANE support moved from Experimental to mainline. The Makefile control
838 for the build is renamed.
840 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
841 was allocated for every new TLS startup, meaning one per message. Fix
842 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
844 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
845 reported the original. Fix to report (as far as possible) the ACL
846 result replacing the original.
848 JH/23 Fix memory leak during multi-message connections using STARTTLS under
849 OpenSSL. Certificate information is loaded for every new TLS startup,
850 and the resources needed to be freed.
852 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
854 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
857 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
858 DATA response info to the (existing) per-recipient response info for
859 the "C=" log element. It can have useful tracking info from the
860 destination system. Patch from Simon Arlott.
862 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
863 length value. Previously this would segfault.
865 HS/02 Support Avast multiline protoocol, this allows passing flags to
866 newer versions of the scanner.
868 JH/28 Ensure that variables possibly set during message acceptance are marked
869 dead before release of memory in the daemon loop. This stops complaints
870 about them when the debug_store option is enabled. Discovered specifically
871 for sender_rate_period, but applies to a whole set of variables.
872 Do the same for the queue-runner and queue-list loops, for variables set
873 from spool message files. Do the same for the SMTP per-message loop, for
874 certain variables indirectly set in ACL operations.
876 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
877 as a multi-recipient message from a mailinglist manager). The coding had
878 an arbitrary cutoff number of characters while checking for more input;
879 enforced by writing a NUL into the buffer. This corrupted long / fast
880 input. The problem was exposed more widely when more pipelineing of SMTP
881 responses was introduced, and one Exim system was feeding another.
882 The symptom is log complaints of SMTP syntax error (NUL chars) on the
883 receiving system, and refused recipients seen by the sending system
884 (propating to people being dropped from mailing lists).
885 Discovered and pinpointed by David Carter.
887 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
888 replaced by the ${authresults } expansion.
890 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
892 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
893 allows proper process termination in container environments.
895 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
896 Previously the "final dot" had a newline after it; ensure it is CR,LF.
898 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
899 and "err_perm", deprecated since 4.83 when the RFC-defined words
900 "temperror" and "permerror" were introduced.
902 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
903 transport-filters or DKIM-signing. The restriction was lost in the
904 consolidation of verify-callout and delivery SMTP handling.
905 Extend the restriction to also cover ARC-signing.
907 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
908 in defer=pass mode supply a 450 to the initiator. Previously the message
911 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
912 tls_require_ciphers is used as before.
914 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
915 "pass_unscanned". Only tmpfails from the scanner are written to
916 the paniclog, as they may require admin intervention (permission
917 denied, license issues). Other scanner errors (like decompression
918 bombs) do not cause a paniclog entry.
920 JH/36 Fix reinitialisation of DKIM logging variable between messages.
921 Previously it was possible to log spurious information in receive log
924 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
925 triggered odd behaviour from Outlook Express clients.
927 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
930 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
931 since the IETF WG has not yet settled on that versus the original
932 "bare" representation.
934 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
935 Previously the millisecond value corrupted the output.
936 Fix also for syslog_pid=no and log_selector +pid, for which the pid
937 corrupted the output.
943 JH/01 Rework error string handling in TLS interface so that the caller in
944 more cases is responsible for logging. This permits library-sourced
945 string to be attached to addresses during delivery, and collapses
946 pairs of long lines into single ones.
948 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
949 during configuration. Wildcards are allowed and expanded.
951 JH/02 Rework error string handling in DKIM to pass more info back to callers.
952 This permits better logging.
954 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
955 do not close it down and have the child transport start it up again on
956 the passed-on TCP connection. Instead, proxy the child (and any
957 subsequent ones) for TLS via a unix-domain socket channel. Logging is
958 affected: the continued delivery log lines do not have any DNSSEC, TLS
959 Certificate or OCSP information. TLS cipher information is still logged.
961 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
962 identical IP addresses on different listening ports. Will also affect
965 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
966 add noisy ifdef guards to special-case this sillyness.
967 Patch from Bernd Kuhls.
969 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
970 than 255 are no longer allowed.
972 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
973 Disable the session-cache too, which might reduce our load. Since we
974 currrectly use a new context for every connection, both as server and
975 client, there is no benefit for these.
976 GnuTLS appears to not support tickets server-side by default (we don't
977 call gnutls_session_ticket_enable_server()) but client side is enabled
978 by default on recent versions (3.1.3 +) unless the PFS priority string
981 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
982 <https://reproducible-builds.org/specs/source-date-epoch/>.
984 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
985 the check for any unsuccessful recipients did not notice the limit, and
986 erroneously found still-pending ones.
988 JH/08 Pipeline CHUNKING command and data together, on kernels that support
989 MSG_MORE. Only in-clear (not on TLS connections).
991 JH/09 Avoid using a temporary file during transport using dkim. Unless a
992 transport-filter is involved we can buffer the headers in memory for
993 creating the signature, and read the spool data file once for the
994 signature and again for transmission.
996 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
997 4.77 as the kernel support then wasn't solid, having issues in 64bit
998 mode. Now, it's been long enough. Add support for FreeBSD also.
1000 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1001 case where the routing stage had gathered several addresses to send to
1002 a host before calling the transport for the first, we previously failed
1003 to close down TLS in the old transport process before passing the TCP
1004 connection to the new process. The new one sent a STARTTLS command
1005 which naturally failed, giving a failed delivery and bloating the retry
1006 database. Investigation and fix prototype from Wolfgang Breyha.
1008 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1009 false-negatives in the check that the sender had not preempted a response
1010 or prompt from Exim (running as a server), due to that code's lack of
1011 awareness of the SMTP input buffering.
1013 PP/04 Add commandline_checks_require_admin option.
1014 Exim drops privileges sanely, various checks such as -be aren't a
1015 security problem, as long as you trust local users with access to their
1016 own account. When invoked by services which pass untrusted data to
1017 Exim, this might be an issue. Set this option in main configuration
1018 AND make fixes to the calling application, such as using `--` to stop
1021 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1022 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1023 responses to those, into a single TLS record each way (this usually means
1024 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1027 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1028 affects you only if you're dancing at the edge of the param size limits.
1029 If you are, and this message makes sense to you, then: raise the
1030 configured limit or use OpenSSL 1.1. Nothing we can do for older
1033 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1034 cmdline element to get the documented default one. Previously it was
1037 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1038 are unsuable for non-message-specific reasons - eg. connection timeout,
1039 banner-time rejection.
1041 JH/16 Fix logging of delivery remote port, when specified by router, under
1044 PP/06 Repair manualroute's ability to take options in any order, even if one
1045 is the name of a transport.
1048 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1050 JH/17 Change the list-building routines interface to use the expanding-string
1051 triplet model, for better allocation and copying behaviour.
1053 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1054 Previously it was constructed the first time a possibly-matching string
1055 was met in the configuration file input during startup; now it is done
1058 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1059 compatible one, to avoid the (poorly documented) possibility of a config
1060 file in the working directory redirecting the DB files, possibly correpting
1061 some existing file. CVE-2017-10140 assigned for BDB.
1063 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1064 cache-hot. Previously, although the result was properly cached, the
1065 initial verify call returned a defer.
1067 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1068 the main verify for receipient in uncached-mode.
1070 JH/22 Retire historical build files to an "unsupported" subdir. These are
1071 defined as "ones for which we have no current evidence of testing".
1073 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1074 if present. Previously it was ignored.
1076 JH/24 Start using specified-initialisers in C structure init coding. This is
1077 a C99 feature (it's 2017, so now considered safe).
1079 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1080 if was a fixed-sized field and bitmask ops via macros; it is now more
1083 PP/07 GitHub PR 56: Apply MariaDB build fix.
1084 Patch provided by Jaroslav Škarvada.
1086 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1087 during Coverity cleanups [4.87 JH/47]
1088 Diagnosis and fix provided by Michael Fischer v. Mollard.
1090 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1091 the right size to place the terminating semicolon on its own folded
1092 line, the header hash was calculated to an incorrect value thanks to
1093 the (relaxed) space the fold became.
1095 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1096 and confused the parent.
1098 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1099 which could crash as a result. This could lead to undeliverable messages.
1101 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1104 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1105 matters on fast-turnover and PID-randomising systems, which were getting
1106 out-of-order delivery.
1108 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1109 a possibly-overlapping copy. The symptom was that "Remote host closed
1110 connection in response to HELO" was logged instead of the actual 4xx
1113 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1114 Previously only that bufferd was discarded, resulting in SYMTP command
1117 JH/32 DKIM: when a message has multiple signatures matching an identity given
1118 in dkim_verify_signers, run the dkim acl once for each. Previously only
1119 one run was done. Bug 2189.
1121 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1122 "panic the current process" to "deliberately defer". The panic log is
1123 still written with the problem list name; the mail and reject logs now
1124 get a temp-reject line for the message that was being handled, saying
1125 something like "domains check lookup or other defer". The SMTP 451
1126 message is still "Temporary local problem".
1128 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1129 A crafted sequence of BDAT commands could result in in-use memory beeing
1130 freed. CVE-2017-16943.
1132 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1133 from SMTP input. Previously it was always done; now only done for DATA
1134 and not BDAT commands. CVE-2017-16944.
1136 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1137 to the message (such as an overlong header line). Previously this was
1138 not done and we did not exit BDAT mode. Followon from the previous item
1139 though a different problem.
1145 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1146 than -2003 did; needs libidn2 in addition to libidn.
1148 JH/02 The path option on a pipe transport is now expanded before use.
1150 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1151 Patch provided by "Björn", documentation fix added too.
1153 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1154 missing a wire-to-host endian conversion.
1156 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1157 close after a BDAT command line could be taken as a following command,
1158 giving a synch failure. Fix by only checking for synch immediately
1159 before acknowledging the chunk.
1161 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1162 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1163 macro. Patches provided by Josh Soref.
1165 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1166 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1167 by IANA as a service extension. However, John Klensin suggests that we
1170 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1171 the dkim code may be unix-mode line endings rather than smtp wire-format
1172 CRLF, so prepend a CR to any bare LF.
1174 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1175 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1177 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1178 the first were themselves being wrongly included in the feed into dkim
1179 processing; with most chunk sizes in use this resulted in an incorrect
1180 body hash calculated value.
1182 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1183 DKIM signature block, for verification. Although advised against by
1184 standards it is specifically not ruled illegal.
1186 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1188 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1189 missing a body hash (the bh= tag).
1191 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1192 It seems that HAProxy sends the Proxy Protocol information in clear and
1193 only then does a TLS startup, so do the same.
1195 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1196 TCP connections (such as for Spamd) unless the daemon successfully set
1197 Fast Open mode on its listening sockets. This fixes breakage seen on
1198 too-old kernels or those not configured for Fast Open, at the cost of
1199 requiring both directions being enabled for TFO, and TFO never being used
1200 by non-daemon-related Exim processes.
1202 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1203 endings, at least on the first header line. Try to canonify any that get
1204 past that check, despite the cost.
1206 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1207 now limited to an arbitrary five deep, while parsing addresses with the
1208 strip_excess_angle_brackets option enabled.
1210 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1211 instead leave the unprompted TLS handshake in socket buffer for the
1212 TLS library to consume.
1214 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1216 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1218 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1219 region in one operation, for speed, and this leaves assigned pointers
1220 dangling. Add checks run only under the testsuite which checks all
1221 variables at a store-reset and panics on a dangling pointer; add code
1222 explicitly nulling out all the variables discovered. Fixes one known
1223 bug: a transport crash, where a dangling pointer for $sending_ip_address
1224 originally assigned in a verify callout, is re-used.
1226 PP/06 Drop '.' from @INC in various Perl scripts.
1228 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1230 PP/08 Reduce a number of compilation warnings under clang; building with
1231 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1232 should be warning-free.
1234 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1236 HS/01 Fix portability problems introduced by PP/08 for platforms where
1237 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1239 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1240 chunk. This allows us to accept broken chunked messages. We need a more
1241 general solution here.
1243 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1244 already-broken messages in the queue.
1246 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1248 JH/19 Fix reference counting bug in routing-generated-address tracking.
1254 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1255 supports it and a size is available (ie. the sending peer gave us one).
1257 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1258 years of being deprecated). The replacements are the ACLs
1259 acl_smtp_mime and acl_not_smtp_mime.
1261 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1262 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1263 or even an in-clear connection were permitted. Now, if the host lookup
1264 was dnssec and dane was requested then the host is only used if the
1265 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1266 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1267 if one fails this test.
1268 This means that a poorly-configured remote DNS will make it incommunicado;
1269 but it protects against a DNS-interception attack on it.
1271 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1272 non-noisy when a race steals the message being considered.
1274 JH/05 If main configuration option tls_certificate is unset, generate a
1275 self-signed certificate for inbound TLS connections.
1277 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1278 in rewrites and routers.
1280 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1281 and logged a warning sing 4.83; now they are a configuration file error.
1283 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1284 (lacking @domain). Apply the same qualification processing as RCPT.
1286 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1288 JH/10 Support ${sha256:} applied to a string (as well as the previous
1291 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1292 a cutthrough deliver is pending, as we always want to make a connection.
1293 This also avoids re-routing the message when later placing the cutthrough
1294 connection after a verify cache hit.
1295 Do not update it with the verify result either.
1297 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1298 when routing results in more than one destination address.
1300 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1301 signing (which inhibits the cutthrough capability). Previously only
1302 the presence of an option was tested; now an expansion evaluating as
1303 empty is permissible (obviously it should depend only on data available
1304 when the cutthrough connection is made).
1306 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1307 the relevant preceding SMTP command did not note the pipelining mode.
1309 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1310 Previously they were not counted.
1312 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1313 as one having no matching records. Previously we deferred the message
1314 that needed the lookup.
1316 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1317 distinguished as "(=".
1319 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1320 for missing MX records. Previously it only worked for missing A records.
1322 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1324 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1325 after the data-go-ahead and data-ack. Patch from Jason Betts.
1327 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1328 even for a "none" policy. Patch from Tony Meyer.
1330 JH/22 Fix continued use of a connection for further deliveries. If a port was
1331 specified by a router, it must also match for the delivery to be
1334 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1335 When one of the recipients of a message was unsuitable for the connection
1336 (has no matching addresses), we lost track of needing to mark it
1337 deferred. As a result mail would be lost.
1339 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1341 JH/25 Decoding ACL controls is now done using a binary search; the source code
1342 takes up less space and should be simpler to maintain. Merge the ACL
1343 condition decode tables also, with similar effect.
1345 JH/26 Fix problem with one_time used on a redirect router which returned the
1346 parent address unchanged. A retry would see the parent address marked as
1347 delivered, so not attempt the (identical) child. As a result mail would
1350 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1351 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1352 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1355 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1356 Main config options check_{log,spool}_{inodes,space} are now
1357 100 inodes, 10MB unless set otherwise in the configuration.
1359 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1360 Previously it only applied to the main-section connection policy
1363 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1365 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1366 by me. Added RFC7919 DH primes as an alternative.
1368 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1369 are not in the system include path.
1371 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1372 GnuTLS, when a session startup failed (eg because the client disconnected)
1373 Exim did stdio operations after fclose. This was exposed by a recent
1374 change which nulled out the file handle after the fclose.
1376 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1377 signed directly by the cert-signing cert, rather than an intermediate
1378 OCSP-signing cert. This is the model used by LetsEncrypt.
1380 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1382 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1383 an incoming connection.
1385 HS/02 Bug 1802: Do not half-close the connection after sending a request
1388 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1389 fallback to "prime256v1".
1391 JH/34 SECURITY: Use proper copy of DATA command in error message.
1392 Could leak key material. Remotely exploitable. CVE-2016-9963.
1398 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1399 and 3.4.4 - once the server is enabled to respond to an OCSP request
1400 it does even when not requested, resulting in a stapling non-aware
1401 client dropping the TLS connection.
1403 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1404 support variable-length bit vectors. No functional change.
1406 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1407 The I= interface field on outgoing lines is now after the H= remote
1408 host field, same as incoming lines. There is a separate
1409 outgoing_interface log selector which allows you to disable the
1412 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1413 If not running log_selector +smtp_connection the mainlog would be held
1414 open indefinitely after a "too many connections" event, including to a
1415 deleted file after a log rotate. Leave the per net connection logging
1416 leaving it open for efficiency as that will be quickly detected by the
1417 check on the next write.
1419 HS/01 Bug 1671: Fix post transport crash.
1420 Processing the wait-<transport> messages could crash the delivery
1421 process if the message IDs didn't exist for some reason. When
1422 using 'split_spool_directory=yes' the construction of the spool
1423 file name failed already, exposing the same netto behaviour.
1425 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1426 mime_regex ACL conditions.
1428 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1429 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1430 to HELO, local diagnostic string.
1432 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1433 log line to debug. Even when configured with a tls authenticator many
1434 client connections are expected to not authenticate in this way, so
1435 an authenticate fail is not an error.
1437 HS/02 Add the Exim version string to the process info. This way exiwhat
1438 gives some more detail about the running daemon.
1440 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1441 matter for fast-change records such as DNSBLs.
1443 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1444 retry record, even if constant. There may be multiple transports with
1445 different interface settings and the retry behaviour needs to be kept
1448 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1450 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1452 JH/10 Bug 840: fix log_defer_output option of pipe transport
1454 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1455 hosts_randomize. This matters a lot when combined with mua_wrapper.
1457 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1458 ${quote_pgsql:<string>} operator.
1460 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1462 JH/14 Change header file name for freeradius-client. Relevant if compiling
1463 with Radius support; from the Gentoo tree and checked under Fedora.
1465 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1467 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1468 option transport_filter, meaning no filtering.
1470 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1472 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1473 defaults to "*" (all hosts). The variable is now available when not built
1474 with TLS, default unset, mainly to enable keeping the testsuite sane.
1475 If a server certificate is not supplied (via tls_certificate) an error is
1476 logged, and clients will find TLS connections fail on startup. Presumably
1477 they will retry in-clear.
1478 Packagers of Exim are strongly encouraged to create a server certificate
1479 at installation time.
1481 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1482 with the $config_file variable.
1484 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1485 in transport context, after the attempt, and per-recipient. The latter type
1486 is per host attempted. The event data is the error message, and the errno
1487 information encodes the lookup type (A vs. MX) used for the (first) host,
1488 and the trailing two digits of the smtp 4xx response.
1490 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1491 to write to mainlog (or rejectlog, paniclog) in the window between file
1492 creation and permissions/ownership being changed. Particularly affects
1493 installations where exicyclog is run as root, rather than exim user;
1494 result is that the running daemon panics and dies.
1496 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1498 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1499 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1500 "pri" and "weight". Note that the previous implicit priority given by the
1501 list order is no longer honoured.
1503 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1504 for DKIM processing.
1506 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1507 by defining SUPPORT_SOCKS.
1509 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1510 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1511 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1512 variables are renamed to proxy_{local,external}_{address,port}.
1514 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1515 for a build by defining SUPPORT_I18N
1517 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1518 of the query string, and make ${quote_redis:} do that quoting.
1520 JH/29 Move Events support from Experimental to mainline, enabled by default
1521 and removable for a build by defining DISABLE_EVENT.
1523 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1525 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1526 cached by the daemon.
1528 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1529 by defining LOOKUP_REDIS. The libhiredis library is required.
1531 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1532 keys are given for lookup.
1534 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1535 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1536 only supported when built with TLS support. The PolarSSL SHA routines
1537 are still used when the TLS library is too old for convenient support.
1539 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1540 openssl_options), for security. OpenSSL forces this from version 1.1.0
1541 server-side so match that on older versions.
1543 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1544 allocation for $value could be released as the expansion processing
1545 concluded, but leaving the global pointer active for it.
1547 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1548 and to use the domains and local_parts ACL conditions.
1550 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1551 incorrectly not doubled on cutthrough transmission, hence seen as a
1552 body-termination at the receiving system - resulting in truncated mails.
1553 Commonly the sender saw a TCP-level error, and retransmitted the message
1554 via the normal store-and-forward channel. This could result in duplicates
1555 received - but deduplicating mailstores were liable to retain only the
1556 initial truncated version.
1558 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1560 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1562 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1563 we're in there, support oversigning also; bug 1309.
1565 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1567 HS/04 Add support for keep_environment and add_environment options.
1569 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1570 either intentional arithmetic overflow during PRNG, or testing config-
1573 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1574 delivery resulted in actual delivery. Cancel cutthrough before DATA
1577 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1578 rejects a recipient: pass the reject to the originator.
1580 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1581 Many were false-positives and ignorable, but it's worth fixing the
1584 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1585 for the new environment-manipulation done at startup. Move the routines
1586 from being local to tls.c to being global via the os.c file.
1588 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1589 an extract embedded as result-arg for a map, the first arg for extract
1590 is unavailable so we cannot tell if this is a numbered or keyed
1591 extraction. Accept either.
1597 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1600 JH/02 The smtp transport option "multi_domain" is now expanded.
1602 JH/03 The smtp transport now requests PRDR by default, if the server offers
1605 JH/04 Certificate name checking on server certificates, when exim is a client,
1606 is now done by default. The transport option tls_verify_cert_hostnames
1607 can be used to disable this per-host. The build option
1608 EXPERIMENTAL_CERTNAMES is withdrawn.
1610 JH/05 The value of the tls_verify_certificates smtp transport and main options
1611 default to the word "system" to access the system default CA bundle.
1612 For GnuTLS, only version 3.0.20 or later.
1614 JH/06 Verification of the server certificate for a TLS connection is now tried
1615 (but not required) by default. The verification status is now logged by
1616 default, for both outbound TLS and client-certificate supplying inbound
1619 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1622 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1623 Status Notification (bounce) messages are now MIME format per RFC 3464.
1624 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1625 under the control of the dsn_advertise_hosts option, and routers may
1626 have a dsn_lasthop option.
1628 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1629 default, modifiable by a malware= option. The list separator for
1630 the options can now be changed in the usual way. Bug 68.
1632 JH/10 The smtp_receive_timeout main option is now expanded before use.
1634 JH/11 The incoming_interface log option now also enables logging of the
1635 local interface on delivery outgoing connections.
1637 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1638 if the interface and destination host and port all match.
1640 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1643 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1644 Patch from Andrew Lewis.
1646 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1647 now supports optional time-restrictions, weighting, and priority
1648 modifiers per server. Patch originally by <rommer@active.by>.
1650 JH/16 The spamd_address main option now supports a mixed list of local
1651 and remote servers. Remote servers can be IPv6 addresses, and
1652 specify a port-range.
1654 JH/17 Bug 68: The spamd_address main option now supports an optional
1655 timeout value per server.
1657 JH/18 Bug 1581: Router and transport options headers_add/remove can
1658 now have the list separator specified.
1660 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1663 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1666 JH/21 Support for the A6 type of dns record is withdrawn.
1668 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1669 rather than the verbs used.
1671 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1672 from 255 to 1024 chars.
1674 JH/24 Verification callouts now attempt to use TLS by default.
1676 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1677 are generic router options now. The defaults didn't change.
1679 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1680 Original patch from Alexander Shikoff, worked over by JH.
1682 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1683 files if ZCAT_COMMAND is not executable.
1685 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1687 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1689 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1690 Normally benign, it bites when the pair was led to by a CNAME;
1691 modern usage is to not canonicalize the domain to a CNAME target
1692 (and we were inconsistent anyway for A-only vs AAAA+A).
1694 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1696 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1697 when evaluating $sender_host_dnssec.
1699 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1700 $sender_helo_dnssec variable.
1702 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1704 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1706 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1708 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1709 documented as working, but never had. Support all but $spam_report.
1711 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1712 added for tls authenticator.
1714 HS/03 Add perl_taintmode main config option
1720 TL/01 When running the test suite, the README says that variables such as
1721 no_msglog_check are global and can be placed anywhere in a specific
1722 test's script, however it was observed that placement needed to be near
1723 the beginning for it to behave that way. Changed the runtest perl
1724 script to read through the entire script once to detect and set these
1725 variables, reset to the beginning of the script, and then run through
1726 the script parsing/test process like normal.
1728 TL/02 The BSD's have an arc4random API. One of the functions to induce
1729 adding randomness was arc4random_stir(), but it has been removed in
1730 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1731 function when detected.
1733 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1734 cause callback expansion.
1736 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1737 syntax errors in an expansion can be treated as a string instead of
1738 logging or causing an error, due to the internal use of bool_lax
1739 instead of bool when processing it.
1741 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1742 server certificates when making smtp deliveries.
1744 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1746 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1748 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1750 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1751 Merged patch from Sebastian Wiedenroth.
1753 JH/05 Fix results-pipe from transport process. Several recipients, combined
1754 with certificate use, exposed issues where response data items split
1755 over buffer boundaries were not parsed properly. This eventually
1756 resulted in duplicates being sent. This issue only became common enough
1757 to notice due to the introduction of connection certificate information,
1758 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1760 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1761 size buffer was used, resulting in syntax errors when an expansion
1764 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1765 version 3.3.6 or later.
1767 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1768 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1769 both become "event_action", the variables become $event_name, $event_data
1770 and $event_defer_errno. There is a new variable $verify_mode, usable in
1771 routers, transports and related events. The tls:cert event is now also
1772 raised for inbound connections, if the main configuration event_action
1775 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1776 early OCSP support, but no stapling (appears to be less than 1.0.0).
1778 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1779 server certificate names available under the smtp transport option
1780 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1783 JH/10 Time-related extraction expansions from certificates now use the main
1784 option "timezone" setting for output formatting, and are consistent
1785 between OpenSSL and GnuTLS compilations. Bug 1541.
1787 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1788 encoded parameter in the incoming message. Bug 1558.
1790 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1791 include certificate info, eximon was claiming there were spoolfile
1794 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1796 JH/14 Log delivery-related information more consistently, using the sequence
1797 "H=<name> [<ip>]" wherever possible.
1799 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1800 are problematic for Debian distribution, omit them from the release
1803 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1805 JH/16 Fix string representation of time values on 64bit time_t architectures.
1808 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1809 output list separator was used.
1814 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1815 checkers that were complaining about end of non-void function with no
1818 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1819 This was a regression introduced in 4.83 by another bugfix.
1821 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1823 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1824 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1830 TF/01 Correctly close the server side of TLS when forking for delivery.
1832 When a message was received over SMTP with TLS, Exim failed to clear up
1833 the incoming connection properly after forking off the child process to
1834 deliver the message. In some situations the subsequent outgoing
1835 delivery connection happened to have the same fd number as the incoming
1836 connection previously had. Exim would try to use TLS and fail, logging
1837 a "Bad file descriptor" error.
1839 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1840 utilities have not been installed.
1842 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1843 temporary space as the ACL may create new global variables.
1845 TL/01 LDAP support uses per connection or global context settings, depending
1846 upon the detected version of the libraries at build time.
1848 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1849 to extract and use the src ip:port in logging and expansions as if it
1850 were a direct connection from the outside internet. PPv2 support was
1851 updated based on HAProxy spec change in May 2014.
1853 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1855 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1856 Properly escape header and check for NULL return.
1858 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1861 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1863 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1864 characters in header names, implemented as a verify condition.
1865 Contributed by Michael Fischer v. Mollard.
1867 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1868 results permerror and temperror. Previous values are deprecated but
1869 still accepted. In a future release, err_perm and err_temp will be
1870 completely removed, which will be a backward incompatibility if the
1871 ACL tests for either of these two old results. Patch contributed by
1872 user bes-internal on the mailing list.
1874 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1876 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1877 selectors, in both main and reject logs.
1879 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1882 JH/07 Add malware type "sock" for talking to simple daemon.
1884 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1886 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1887 routers/transports under cutthrough routing.
1889 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1890 numbers. Touch up "bool" conditional to keep the same definition.
1892 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1894 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1896 JH/12 Expand items in router/transport headers_add or headers_remove lists
1897 individually rather than the list as a whole. Bug 1452.
1899 Required for reasonable handling of multiple headers_ options when
1900 they may be empty; requires that headers_remove items with embedded
1901 colons must have them doubled (or the list-separator changed).
1903 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1904 view the policy declared in the DMARC record. Currently, $dmarc_status
1905 is a combined value of both the record presence and the result of the
1908 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1910 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1911 dnslookup router and the smtp transport (applying to the forward
1914 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1915 of ldap servers used for a specific lookup. Patch provided by Heiko
1918 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1919 New variable $lookup_dnssec_authenticated for observability.
1921 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1922 Patch submitted by Lars Timman.
1924 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1926 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1927 Requires trusted mode and valid format message id, aborts otherwise.
1928 Patch contributed by Heiko Schlichting.
1930 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1931 certextract with support for various fields. Bug 1358.
1933 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1934 is requested by default, modifiable by smtp transport option
1937 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1938 operate on certificate variables to give certificate fingerprints
1939 Also new ${sha256:cert_variable}.
1941 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1943 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1944 Christian Aistleitner.
1946 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1948 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1949 file. Patch from Wolfgang Breyha.
1951 JH/25 Expand the coverage of the delivery $host and $host_address to
1952 client authenticators run in verify callout. Bug 1476.
1954 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1955 align with daemon_smtp_ports. Bug 72.
1957 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1958 support and error reporting did not work properly.
1960 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1961 and is readable. Patch from Andrew Colin Kissa.
1963 TL/14 Enhance documentation of ${run expansion and how it parses the
1964 commandline after expansion, particularly in the case when an
1965 unquoted variable expansion results in an empty value.
1967 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1969 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1970 by renaming away from it. Addresses GH issue 15, reported by
1973 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1975 TL/15 SECURITY: prevent double expansion in math comparison functions
1976 (can expand unsanitized data). Not remotely exploitable.
1983 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1985 PP/02 Make -n do something, by making it not do something.
1986 When combined with -bP, the name of an option is not output.
1988 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1991 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1992 $sender_host_name and config options to manage this, and basic check
1995 PP/05 DSCP support for outbound connections and control modifier for inbound.
1997 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1998 (Only plugin which currently uses this is kerberos4, which nobody should
1999 be using, but we should make it available and other future plugins might
2000 conceivably use it, even though it would break NAT; stuff *should* be
2001 using channel bindings instead).
2003 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2004 name; added for Sendmail compatibility; requires admin caller.
2005 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2006 just ignore it); requires trusted caller.
2007 Also parse but ignore: -Ac -Am -X<logfile>
2010 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2012 TL/02 Add +smtp_confirmation as a default logging option.
2014 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2015 Patch by Magnus Holmgren from 2007-02-20.
2017 TL/04 Bugzilla 1281 - Spec typo.
2018 Bugzilla 1283 - Spec typo.
2019 Bugzilla 1290 - Spec grammar fixes.
2021 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2023 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2025 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2026 mailing list by by Dmitry Isaikin.
2028 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2030 JH/02 Support "G" suffix to numbers in ${if comparisons.
2032 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2034 NM/01 Bugzilla 1197 - Spec typo
2035 Bugzilla 1196 - Spec examples corrections
2037 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2039 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2040 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2043 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2044 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2046 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2047 "acl {{name}{arg}...}", and optional args on acl condition
2050 JH/05 Permit multiple router/transport headers_add/remove lines.
2052 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2054 JH/07 Avoid using a waiting database for a single-message-only transport.
2055 Performance patch from Paul Fisher. Bugzilla 1262.
2057 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2060 JH/09 Add $headers_added variable, with content from use of ACL modifier
2061 add_header (but not yet added to the message). Bugzilla 199.
2063 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2064 Pulled from Bugzilla 817 by Wolfgang Breyha.
2066 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2068 (nb: this is the same fix as in Exim 4.80.1)
2070 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2073 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2076 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2078 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2079 advertise SMTP AUTH mechanism to us, instead of a generic
2080 protocol violation error. Also, make Exim more robust to bad
2081 data from the Dovecot auth socket.
2083 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2085 When a queue runner is handling a message, Exim first routes the
2086 recipient addresses, during which it prunes them based on the retry
2087 hints database. After that it attempts to deliver the message to
2088 any remaining recipients. It then updates the hints database using
2091 So if a recipient address works intermittently, it can get repeatedly
2092 deferred at routing time. The retry hints record remains fresh so the
2093 address never reaches the final cutoff time.
2095 This is a fairly common occurrence when a user is bumping up against
2096 their storage quota. Exim had some logic in its local delivery code
2097 to deal with this. However it did not apply to per-recipient defers
2098 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2100 This change adds a proper retry rule check during routing so that the
2101 final cutoff time is checked against the message's age. We only do
2102 this check if there is an address retry record and there is not a
2103 domain retry record; this implies that previous attempts to handle
2104 the address had the retry_use_local_parts option turned on. We use
2105 this as an approximation for the destination being like a local
2106 delivery, as in LMTP.
2108 I suspect this new check makes the old local delivery cutoff check
2109 redundant, but I have not verified this so I left the code in place.
2111 TF/02 Correct gecos expansion when From: is a prefix of the username.
2113 Test 0254 submits a message to Exim with the header
2117 When I ran the test suite under the user fanf2, Exim expanded
2118 the header to contain my full name, whereas it should have added
2119 a Resent-Sender: header. It erroneously treats any prefix of the
2120 username as equal to the username.
2122 This change corrects that bug.
2124 GF/01 DCC debug and logging tidyup
2125 Error conditions log to paniclog rather than rejectlog.
2126 Debug lines prefixed by "DCC: " to remove any ambiguity.
2128 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2130 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2131 Bug spotted by Jeremy Harris; was flawed since initial commit.
2132 Would have resulted in OCSP responses post-SNI triggering an Exim
2133 NULL dereference and crash.
2135 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2137 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2138 Bug detection, analysis and fix by Samuel Thibault.
2139 Bugzilla 1331, Debian bug #698092.
2141 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2143 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2144 Server implementation by Todd Lyons, client by JH.
2145 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2146 config variable "prdr_enable" controls whether the server
2147 advertises the facility. If the client requests PRDR a new
2148 acl_data_smtp_prdr ACL is called once for each recipient, after
2149 the body content is received and before the acl_smtp_data ACL.
2150 The client is controlled by both of: a hosts_try_prdr option
2151 on the smtp transport, and the server advertisement.
2152 Default client logging of deliveries and rejections involving
2153 PRDR are flagged with the string "PRDR".
2155 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2156 fclose(). Diagnosis by Todd Lyons.
2158 PP/17 Update configure.default to handle IPv6 localhost better.
2159 Patch by Alain Williams (plus minor tweaks).
2162 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2163 This is now consistent with GnuTLS, and is now documented: the
2164 previous undocumented portable approach to treating the option as
2165 unset was to force an expansion failure. That still works, and
2166 an empty string is now equivalent.
2168 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2169 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2170 not performing validation itself.
2172 PP/20 Added force_command boolean option to pipe transport.
2173 Patch from Nick Koston, of cPanel Inc.
2175 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2178 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2180 PP/21 Fix eximon continuous updating with timestamped log-files.
2181 Broken in a format-string cleanup in 4.80, missed when I repaired the
2182 other false fix of the same issue.
2183 Report and fix from Heiko Schlichting.
2186 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2187 Report from Prashanth Katuri.
2189 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2190 It's SecureTransport, so affects any MacOS clients which use the
2191 system-integrated TLS libraries, including email clients.
2193 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2194 using a MIME ACL for non-SMTP local injection.
2195 Report and assistance in diagnosis by Warren Baker.
2197 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2199 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2201 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2202 last id that failed so it may be referenced in subsequent ACL's.
2204 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2207 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2208 ldap library initialization, allowing self-signed CA's to be
2209 used. Also properly sets require_cert option later in code by
2210 using NULL (global ldap config) instead of ldap handle (per
2211 session). Bug diagnosis and testing by alxgomz.
2213 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2214 the src/util/ subdirectory.
2216 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2217 renamed to Transport Post Delivery Action by Jeremy Harris, as
2220 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2221 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2222 redis_servers = needs to be configured which will be used by the redis
2223 lookup. Patch from Warren Baker, of The Packet Hub.
2225 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2227 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2228 hostname or reverse DNS when processing a host list. Used suggestions
2229 from multiple comments on this bug.
2231 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2233 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2234 Missed a few lines, added it to make the runtest require no keyboard
2237 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2238 contains upper case chars. Make router use caseful_local_part.
2240 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2241 support when GnuTLS has been built with p11-kit.
2247 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2249 This, or similar/improved, will also be change PP/11 of 4.82.
2255 PP/01 Handle short writes when writing local log-files.
2256 In practice, only affects FreeBSD (8 onwards).
2257 Bugzilla 1053, with thanks to Dmitry Isaikin.
2259 NM/01 Bugzilla 949 - Documentation tweak
2261 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2264 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2266 PP/02 Implemented gsasl authenticator.
2268 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2270 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2271 `pkg-config foo` for cflags/libs.
2273 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2274 with rest of GSASL and with heimdal_gssapi.
2276 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2277 `pkg-config foo` for cflags/libs for the TLS implementation.
2279 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2280 properties get this fed in as external SSF. A number of robustness
2281 and debugging improvements to the cyrus_sasl authenticator.
2283 PP/08 cyrus_sasl server now expands the server_realm option.
2285 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2286 Patch by Jeremy Harris.
2288 PP/10 Added dbmjz lookup type.
2290 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2292 PP/12 MAIL args handles TAB as well as SP, for better interop with
2293 non-compliant senders.
2294 Analysis and variant patch by Todd Lyons.
2296 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2297 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2298 Patch from Dirk Mueller <dmueller@suse.com>
2300 PP/13 tls_peerdn now print-escaped for spool files.
2301 Observed some $tls_peerdn in wild which contained \n, which resulted
2302 in spool file corruption.
2304 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2305 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2306 or write after TLS renegotiation, which otherwise led to messages
2309 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2310 as a tracking header (ie: a signed header comes before the signature).
2311 Patch from Wolfgang Breyha.
2313 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2314 comma-sep list; embedded commas doubled.
2316 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2318 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2320 Report and patch from Dmitry Banschikov.
2322 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2323 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2324 failures. We appear to now support TLS1.1+ with Exim.
2326 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2327 lets Exim select keys and certificates based upon TLS SNI from client.
2328 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2329 before an outbound SMTP session. New log_selector, +tls_sni.
2331 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2332 NULL dereference. Report and patch from Alun Jones.
2334 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2335 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2336 Not seeing resolver debug output on NetBSD, but suspect this is a
2337 resolver implementation change.
2339 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2340 Left warnings. Added "eximon gdb" invocation mode.
2342 PP/21 Defaulting "accept_8bitmime" to true, not false.
2344 PP/22 Added -bw for inetd wait mode support.
2346 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2347 locate the relevant includes and libraries. Made this the default.
2349 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2350 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2352 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2353 This may cause build issues on older platforms.
2355 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2356 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2357 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2358 Added SNI support via GnuTLS too.
2359 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2361 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2363 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2364 Applied second patch from Janne, implementing suggestion to default
2365 multiple-strings-in-record handling to match SPF spec.
2367 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2369 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2370 read-only, out of scope).
2371 Patch from Wolfgang Breyha, report from Stuart Northfield.
2373 PP/29 Fix three issues highlighted by clang analyser static analysis.
2374 Only crash-plausible issue would require the Cambridge-specific
2375 iplookup router and a misconfiguration.
2376 Report from Marcin Mirosław.
2378 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2380 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2381 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2382 As part of this, removing so much warning spew let me fix some minor
2383 real issues in debug logging.
2385 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2386 assignment on my part. Fixed.
2388 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2389 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2390 Janne Snabb (who went above and beyond: thank you).
2392 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2393 string otherwise requires a connection and a bunch more work and it's
2394 relatively easy to get wrong. Should also expose TLS library linkage
2397 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2398 64-bit ${eval} (JH/03).
2400 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2401 GNU libc to support some of the 64-bit stuff, should not lead to
2402 conflicts. Defined before os.h is pulled in, so if a given platform
2403 needs to override this, it can.
2405 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2406 protection layer was required, which is not implemented.
2407 Bugzilla 1254, patch from Wolfgang Breyha.
2409 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2410 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2411 tls_dhparam take prime identifiers. Also unbreak combination of
2412 OpenSSL+DH_params+TLSSNI.
2414 PP/39 Disable SSLv2 by default in OpenSSL support.
2420 PP/01 Solaris build fix for Oracle's LDAP libraries.
2421 Bugzilla 1109, patch from Stephen Usher.
2423 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2425 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2428 TF/02 Fix a couple more cases where we did not log the error message
2429 when unlink() failed. See also change 4.74-TF/03.
2431 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2432 lock up or crash if it happened to be inside a call to libc when it
2433 got a SIGUSR1 from exiwhat.
2435 The SIGUSR1 handler appends the current process status to the process
2436 log which is later printed by exiwhat. It used to use the general
2437 purpose logging code to do this, but several functions it calls are
2438 not safe for signals.
2440 The new output code in the SIGUSR1 handler is specific to the process
2441 log, and simple enough that it's easy to inspect for signal safety.
2442 Removing some special cases also simplifies the general logging code.
2443 Removing the spurious timestamps from the process log simplifies
2446 TF/04 Improved ratelimit ACL condition.
2448 The /noupdate option has been deprecated in favour of /readonly which
2449 has clearer semantics. The /leaky, /strict, and /readonly update modes
2450 are mutually exclusive. The update mode is no longer included in the
2451 database key; it just determines when the database is updated. (This
2452 means that when you upgrade Exim will forget old rate measurements.)
2454 Exim now checks that the per_* options are used with an update mode that
2455 makes sense for the current ACL. For example, when Exim is processing a
2456 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2457 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2458 must specify per_mail/readonly. If you omit the update mode it defaults to
2459 /leaky where that makes sense (as before) or /readonly where required.
2461 The /noupdate option is now undocumented but still supported for
2462 backwards compatibility. It is equivalent to /readonly except that in
2463 ACLs where /readonly is required you may specify /leaky/noupdate or
2464 /strict/noupdate which are treated the same as /readonly.
2466 A useful new feature is the /count= option. This is a generalization
2467 of the per_byte option, so that you can measure the throughput of other
2468 aggregate values. For example, the per_byte option is now equivalent
2469 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2471 The per_rcpt option has been generalized using the /count= mechanism
2472 (though it's more complicated than the per_byte equivalence). When it is
2473 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2474 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2475 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2476 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2477 Note that using per_rcpt with a non-readonly update mode in more than
2478 one ACL will cause the recipients to be double-counted. (The per_mail
2479 and per_byte options don't have this problem.)
2481 The handling of very low rates has changed slightly. If the computed rate
2482 is less than the event's count (usually one) then this event is the first
2483 after a long gap. In this case the rate is set to the same as this event's
2484 count, so that the first message of a spam run is counted properly.
2486 The major new feature is a mechanism for counting the rate of unique
2487 events. The new per_addr option counts the number of different
2488 recipients that someone has sent messages to in the last time period. It
2489 behaves like per_rcpt if all the recipient addresses are different, but
2490 duplicate recipient addresses do not increase the measured rate. Like
2491 the /count= option this is a general mechanism, so the per_addr option
2492 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2493 example, measure the rate that a client uses different sender addresses
2494 with the options per_mail/unique=$sender_address. There are further
2495 details in the main documentation.
2497 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2499 TF/06 Removed a few PCRE remnants.
2501 TF/07 Automatically extract Exim's version number from tags in the git
2502 repository when doing development or release builds.
2504 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2505 Bugzilla 879. Patch from Paul Fisher.
2507 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2508 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2511 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2513 PP/05 Variable $av_failed, true if the AV scanner deferred.
2514 Bugzilla 1078. Patch from John Horne.
2516 PP/06 Stop make process more reliably on build failure.
2517 Bugzilla 1087. Patch from Heiko Schlittermann.
2519 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2520 Bugzilla 1089. Patch from Heiko Schlittermann.
2522 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2523 Bugzilla 1131. Patch from Holger Weiß.
2525 PP/09 Handle IPv6 addresses with SPF.
2526 Bugzilla 860. Patch from Wolfgang Breyha.
2528 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2530 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2533 PP/11 match_* no longer expand right-hand-side by default.
2534 New compile-time build option, EXPAND_LISTMATCH_RHS.
2535 New expansion conditions, "inlist", "inlisti".
2537 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2539 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2541 PP/14 fix log_write() format string regression from TF/03.
2542 Bugzilla 1152. Patch from Dmitry Isaikin.
2548 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2550 PP/02 Harmonised TLS library version reporting; only show if debugging.
2551 Layout now matches that introduced for other libraries in 4.74 PP/03.
2553 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2555 PP/04 New "dns_use_edns0" global option.
2557 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2560 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2561 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2563 TK/01 Updated PolarSSL code to 0.14.2.
2564 Bugzilla 1097. Patch from Andreas Metzler.
2566 PP/07 Catch divide-by-zero in ${eval:...}.
2567 Fixes bugzilla 1102.
2569 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2572 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2573 format-string attack -- SECURITY: remote arbitrary code execution.
2575 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2576 time unintentionally subject to list matching rules, letting the header
2577 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2578 arbitrary string expansion). This allowed for information disclosure.
2580 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2581 INT_MIN/-1 -- value coerced to INT_MAX.
2587 NM/01 Workaround for PCRE version dependency in version reporting
2590 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2591 This fixes portability to compilers other than gcc, notably
2592 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2594 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2595 makefiles for portability to HP-UX and POSIX correctness.
2597 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2598 Also via indented variable definition in the Makefile.
2599 (Debugging by Oliver Heesakkers).
2601 PP/02 Restore caching of spamd results with expanded spamd_address.
2602 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2604 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2605 Improves build reliability. Fix from: Frank Elsner
2607 NM/02 Fix wide character breakage in the rfc2047 coding
2608 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2610 NM/03 Allow underscore in dnslist lookups
2611 Fixes bug 1026. Patch from Graeme Fowler
2613 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2614 Code patches from Adam Ciarcinski of NetBSD.
2616 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2619 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2620 is logged, to avoid truncation. Patch from John Horne.
2622 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2623 Patch from Jakob Hirsch.
2625 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2626 SQL string expansion failure details.
2627 Patch from Andrey Oktyabrski.
2629 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2630 Patch from Simon Arlott.
2632 PP/09 New lookups functionality failed to compile on old gcc which rejects
2633 extern declarations in function scope.
2634 Patch from Oliver Fleischmann
2636 PP/10 Use sig_atomic_t for flags set from signal handlers.
2637 Check getgroups() return and improve debugging.
2638 Fixed developed for diagnosis in bug 927 (which turned out to be
2641 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2642 Patch from Mark Zealey.
2644 PP/12 Bugzilla 1056: Improved spamd server selection.
2645 Patch from Mark Zealey.
2647 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2648 Based on patch from Heiko Schlittermann.
2650 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2651 Patch from Uwe Doering, sign-off by Michael Haardt.
2653 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2654 variable declaration deep within a block. Bug and patch from
2657 PP/15 lookups-Makefile IRIX compatibility coercion.
2659 PP/16 Make DISABLE_DKIM build knob functional.
2661 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2662 Patch by Simon Arlott
2664 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2665 variable argument macros. Our copy now differs from upstream.
2671 TF/01 Failure to get a lock on a hints database can have serious
2672 consequences so log it to the panic log.
2674 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2675 controlled using the smtp_confirmation log selector.
2677 TF/03 Include the error message when we fail to unlink a spool file.
2679 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2680 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2681 for maintaining out-of-tree patches for some time.
2683 PP/01 Bugzilla 139: Documentation and portability issues.
2684 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2685 Handle per-OS dynamic-module compilation flags.
2687 PP/02 Let /dev/null have normal permissions.
2688 The 4.73 fixes were a little too stringent and complained about the
2689 permissions on /dev/null. Exempt it from some checks.
2690 Reported by Andreas M. Kirchwitz.
2692 PP/03 Report version information for many libraries, including
2693 Exim version information for dynamically loaded libraries. Created
2694 version.h, now support a version extension string for distributors
2695 who patch heavily. Dynamic module ABI change.
2697 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2698 privilege escalation vulnerability whereby the Exim run-time user
2699 can cause root to append content of the attacker's choosing to
2702 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2705 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2706 If dropping privileges for untrusted macros, we disabled normal logging
2707 on the basis that it would fail; for the Exim run-time user, this is not
2708 the case, and it resulted in successful deliveries going unlogged.
2709 Fixed. Reported by Andreas Metzler.
2715 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2716 only prepend for the Resent-* case. Fixes regression introduced in
2717 Exim 4.70 by NM/22 for Bugzilla 607.
2719 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2720 increasing numbers of administrators be bitten by this.
2722 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2724 PP/03 Bugzilla 994: added openssl_options main configuration option.
2726 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2728 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2730 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2732 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2733 without a peer certificate, leading to a segfault because of an
2734 assumption that peers always have certificates. Be a little more
2735 paranoid. Problem reported by Martin Tscholak.
2737 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2738 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2739 NB: ClamAV planning to remove STREAM in "middle of 2010".
2740 CL also introduces -bmalware, various -d+acl logging additions and
2741 more caution in buffer sizes.
2743 PP/09 Implemented reverse_ip expansion operator.
2745 PP/10 Bugzilla 937: provide a "debug" ACL control.
2747 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2749 PP/12 Bugzilla 973: Implement --version.
2751 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2753 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2755 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2757 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2758 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2759 ignore trailing whitespace.
2761 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2763 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2766 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2767 Notification from Dr Andrew Aitchison.
2769 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2770 ExtendedDetectionInfo response format.
2771 Notification from John Horne.
2773 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2776 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2777 XSL and documented dependency on system catalogs, with examples of how
2780 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2783 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2784 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2785 configuration file which is writeable by the Exim user or group.
2787 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2788 of configuration files to cover files specified with the -C option if
2789 they are going to be used with root privileges, not just the default
2792 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2793 option (effectively making it always true).
2795 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2796 files to be used while preserving root privileges.
2798 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2799 that rogue child processes cannot use them.
2801 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2802 run-time user, instead of root.
2804 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2805 Exim run-time user without dropping privileges.
2807 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2808 result string, instead of calling string_vformat() twice with the same
2811 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2812 for other users. Others should always drop root privileges if they use
2813 -C on the command line, even for a whitelisted configure file.
2815 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2817 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2823 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2824 $data_path, and $header_path variables; fixed documentation bugs and
2827 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2828 exipick to access non-standard spools, including the "frozen" queue
2831 NM/01 Bugzilla 965: Support mysql stored procedures.
2832 Patch from Alain Williams
2834 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2836 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2837 Patch from Andreas Metzler
2839 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2840 Patch from Kirill Miazine
2842 NM/05 Bugzilla 671: Added umask to procmail example.
2844 JJ/03 installed exipick 20100323.0, fixing doc bug
2846 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2847 directory. Notification and patch from Dan Rosenberg.
2849 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2851 TK/02 Improve log output when DKIM signing operation fails.
2853 MH/01 Treat the transport option dkim_domain as a colon separated
2854 list, not as a single string, and sign the message with each element,
2855 omitting multiple occurences of the same signer.
2857 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2858 Bugzilla 985, 986. Patch by Simon Arlott
2860 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2861 Patch by Simon Arlott
2863 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2864 MBX locking. Notification from Dan Rosenberg.
2870 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2872 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2874 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2876 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2878 NM/04 Bugzilla 915: Flag broken perl installation during build.
2884 TK/01 Added patch by Johannes Berg that expands the main option
2885 "spamd_address" if it starts with a dollar sign.
2887 TK/02 Write list of recipients to X-Envelope-Sender header when building
2888 the mbox-format spool file for content scanning (suggested by Jakob
2891 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2892 (http://www.dcc-servers.net/) support via dccifd. Activated by
2893 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2895 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2896 by Mark Daniel Reidel <mr@df.eu>.
2898 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2899 When building exim an external PCRE library is now needed -
2900 PCRE is a system library on the majority of modern systems.
2901 See entry on PCRE_LIBS in EDITME file.
2903 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2904 conversation. Added nologin parameter to request.
2905 Patch contributed by Kirill Miazine.
2907 TF/01 Do not log submission mode rewrites if they do not change the address.
2909 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2911 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2912 log files in place. Contributed by Roberto Lima.
2914 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2916 TF/03 Bugzilla 615: When checking the local_parts router precondition
2917 after a local_part_suffix or local_part_prefix option, Exim now
2918 does not use the address's named list lookup cache, since this
2919 contains cached lookups for the whole local part.
2921 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2922 Robert Millan. Documentation is in experimental-spec.txt.
2924 TF/04 Bugzilla 668: Fix parallel build (make -j).
2926 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2928 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2929 Patch provided by Jan Srzednicki.
2931 TF/05 Leading white space used to be stripped from $spam_report which
2932 wrecked the formatting. Now it is preserved.
2934 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2935 that they are available at delivery time.
2937 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2939 TF/08 TLS error reporting now respects the incoming_interface and
2940 incoming_port log selectors.
2942 TF/09 Produce a more useful error message if an SMTP transport's hosts
2943 setting expands to an empty string.
2945 NM/06 Bugzilla 744: EXPN did not work under TLS.
2946 Patch provided by Phil Pennock.
2948 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2949 Patch provided by Richard Godbee.
2951 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2952 acl_smtp_notquit, added index entry.
2954 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2955 Patch provided by Eugene Bujak.
2957 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2958 accept(). Patch provided by Maxim Dounin.
2960 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2961 Patch provided by Phil Pennock.
2963 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2965 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2966 Patch provided by Brad "anomie" Jorsch.
2968 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2969 Patch provided by Dean Brooks.
2971 TK/05 Add native DKIM support (does not depend on external libraries).
2973 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2974 Patch provided by Graeme Fowler.
2976 NM/16 Bugzilla 851: Documentation example syntax fix.
2978 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2980 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2983 NM/19 Bugzilla 745: TLS version reporting.
2984 Patch provided by Phil Pennock.
2986 NM/20 Bugzilla 167: bool: condition support.
2987 Patch provided by Phil Pennock.
2989 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2990 clients. Patch provided by Phil Pennock.
2992 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2993 Patch provided by Brad "anomie" Jorsch.
2995 NM/23 Bugzilla 687: Fix misparses in eximstats.
2996 Patch provided by Heiko Schlittermann.
2998 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2999 Patch provided by Heiko Schlittermann.
3001 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3002 plus update to original patch.
3004 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3006 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3007 Patch provided by David Brownlee.
3009 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3011 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3013 NM/30 Bugzilla 888: TLS documentation bugfixes.
3015 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3017 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3018 Unlike the original bugzilla I have changed all shell scripts in src tree.
3020 NM/33 Bugzilla 898: Transport filter timeout fix.
3021 Patch by Todd Rinaldo.
3023 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3024 Patch by Serge Demonchaux.
3026 NM/35 Bugzilla 39: Base64 decode bug fixes.
3027 Patch by Jakob Hirsch.
3029 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3031 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3033 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3035 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3041 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3042 ALT-N's libdkim that I have put here:
3043 http://duncanthrax.net/exim-experimental/
3045 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3046 were called 'true' and it seems that C99 defines that as a reserved
3047 keyword to be used with 'bool' variable types. That means you could
3048 not include C99-style headers which use bools without triggering
3049 build errors in sieve.c.
3051 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3052 as mailq or other aliases. Changed the --help handling significantly
3053 to do whats expected. exim_usage() emits usage/help information.
3055 SC/01 Added the -bylocaldomain option to eximstats.
3057 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3059 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3061 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3067 PH/01 Another patch from the Sieve maintainer.
3069 PH/02 When an IPv6 address is converted to a string for single-key lookup
3070 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3071 dots are used instead of colons so that keys in lsearch files need not
3072 contain colons. This was done some time before quoting was made available
3073 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3074 (notated using the quote facility) so as to distinguish them from IPv4
3075 keys. This meant that lookups for IP addresses in host lists did not work
3076 for iplsearch lookups.
3078 This has been fixed by arranging for IPv6 addresses to be expressed with
3079 colons if the lookup type is iplsearch. This is not incompatible, because
3080 previously such lookups could never work.
3082 The situation is now rather anomalous, since one *can* have colons in
3083 ordinary lsearch keys. However, making the change in all cases is
3084 incompatible and would probably break a number of configurations.
3086 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3089 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3090 conversion specification without a maximum field width, thereby enabling
3091 a rogue spamd server to cause a buffer overflow. While nobody in their
3092 right mind would setup Exim to query an untrusted spamd server, an
3093 attacker that gains access to a server running spamd could potentially
3094 exploit this vulnerability to run arbitrary code as the Exim user.
3096 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3097 $primary_hostname instead of what libspf2 thinks the hosts name is.
3099 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3100 a directory entry by the name of the lookup key. Previously, if a
3101 symlink pointed to a non-existing file or a file in a directory that
3102 Exim lacked permissions to read, a lookup for a key matching that
3103 symlink would fail. Now it is enough that a matching directory entry
3104 exists, symlink or not. (Bugzilla 503.)
3106 PH/03 The body_linecount and body_zerocount variables are now exported in the
3109 PH/04 Added the $dnslist_matched variable.
3111 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3112 This means they are set thereafter only if the connection becomes
3115 PH/06 Added the client_condition to authenticators so that some can be skipped
3116 by clients under certain conditions.
3118 PH/07 The error message for a badly-placed control=no_multiline_responses left
3119 "_responses" off the end of the name.
3121 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3123 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3124 (without spaces) instead of just copying the configuration text.
3126 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3128 PH/11 Added $max_received_linelength.
3130 PH/12 Added +ignore_defer and +include_defer to host lists.
3132 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3133 way in which PCRE > 7.0 is built.
3135 PH/14 Implemented queue_only_load_latch.
3137 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3138 MAIL command. The effect was to mangle the value on 64-bit systems.
3140 PH/16 Another patch from the Sieve maintainer.
3142 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3144 PH/18 If a system quota error occurred while trying to create the file for
3145 a maildir delivery, the message "Mailbox is full" was not appended to the
3146 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3147 only to a quota excession during the actual writing of the file.
3149 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3150 characters?) which causes problems in log lines. The DN values are now
3151 passed through string_printing() before being added to log lines.
3153 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3154 and InterBase are left for another time.)
3156 PH/21 Added message_body_newlines option.
3158 PH/22 Guard against possible overflow in moan_check_errorcopy().
3160 PH/23 POSIX allows open() to be a macro; guard against that.
3162 PH/24 If the recipient of an error message contained an @ in the local part
3163 (suitably quoted, of course), incorrect values were put in $domain and
3164 $local_part during the evaluation of errors_copy.
3170 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3171 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3174 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3175 issue a MAIL command.
3177 PH/02 In an ACL statement such as
3179 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3181 if a client was not listed at all, or was listed with a value other than
3182 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3183 the condition was not true (as it should be), so access was not denied.
3184 The bug was that the ! inversion was incorrectly passed on to the second
3185 item. This has been fixed.
3187 PH/03 Added additional dnslists conditions == and =& which are different from
3188 = and & when the dns lookup returns more than one IP address.
3190 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3191 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3193 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3194 FSYNC, which compiles an option called disable_fsync that allows for
3195 bypassing fsync(). The documentation is heavily laced with warnings.
3197 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3199 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3200 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3201 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3202 including adding "make clean"; (3) Added -fPIC when compiling the test
3203 dynamically loaded module, to get rid of a warning.
3205 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3206 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3207 = 0s. The bug is otherwise harmless.
3209 PH/07 There was a bug in the dovecot authenticator such that the value of
3210 $auth1 could be overwritten, and so not correctly preserved, after a
3211 successful authentication. This usually meant that the value preserved by
3212 the server_setid option was incorrect.
3214 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3216 PH/09 Installed PCRE release 7.0.
3218 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3219 run for batched SMTP input. It is now run at the start of every message
3220 in the batch. While fixing this I discovered that the process information
3221 (output by running exiwhat) was not always getting set for -bs and -bS
3222 input. This is fixed, and it now also says "batched" for BSMTP.
3224 PH/11 Added control=no_pipelining.
3226 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3227 patch, slightly modified), and move the expansion of helo_data till after
3228 the connection is made in the smtp transport (so it can use these
3231 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3233 PH/14 Added log_selector = +pid.
3235 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3237 PH/16 Add ${if forany and ${if forall.
3239 PH/17 Added dsn_from option to vary the From: line in DSNs.
3241 PH/18 Flush SMTP output before performing a callout, unless control =
3242 no_callout_flush is set.
3244 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3245 was true (the default) a successful delivery failed to delete the retry
3246 item, thus causing premature timeout of the address. The bug is now
3249 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3251 PH/21 Long custom messages for fakedefer and fakereject are now split up
3252 into multiline responses in the same way that messages for "deny" and
3253 other ACL rejections are.
3255 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3256 with slight modification.
3258 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3259 draft, changing the syntax and factoring some duplicate code".
3261 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3262 for deliveries of the second and subsequent messages over the same SMTP
3265 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3266 ${reduce, with only minor "tidies".
3268 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3270 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3271 expansion side effects.
3273 PH/27 When a message times out after an over-quota error from an Exim-imposed
3274 quota, the bounce message says "mailbox is full". This message was not
3275 being given when it was a system quota that was exceeded. It now should
3278 MH/03 Made $recipients available in local_scan(). local_scan() already has
3279 better access to the recipient list through recipients_list[], but
3280 $recipients can be useful in postmaster-provided expansion strings.
3282 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3283 in the case of a MAIL command with additional options following the
3284 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3285 were accidentally chopped off.
3287 PH/29 SMTP synchronization checks are implemented when a command is read -
3288 there is a check that no more input is waiting when there shouldn't be
3289 any. However, for some commands, a delay in an ACL can mean that it is
3290 some time before the response is written. In this time, more input might
3291 arrive, invalidly. So now there are extra checks after an ACL has run for
3292 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3293 pipelining has not been advertised.
3295 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3297 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3298 returned in the SMTP response when smtp_return_error_details was false.
3299 This has been fixed.
3301 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3302 instead of the C I/O that was originally supplied, because problems were
3303 reported on Solaris.
3305 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3306 Exim which did not show up earlier: it was assuming that a call to
3307 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3308 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3309 was a macro that became an assignment, so it seemed to work. This has
3310 changed to a proper function call with a void return, hence the compile
3311 error. Exim's code has been fixed.
3313 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3316 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3318 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3320 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3321 because it turns out to be too big or there is a timeout) there is no
3322 "Completed" line in the log. When some messages of this type were
3323 selected by exigrep, they were listed as "not completed". Others were
3324 picked up by some special patterns. I have improved the selection
3325 criteria to be more general.
3327 PH/38 The host_find_failed option in the manualroute router can now be set
3328 to "ignore", to completely ignore a host whose IP address cannot be
3329 found. If all hosts are ignored, the behaviour is controlled by the new
3330 host_all_ignored option.
3332 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3333 homing or because of multiple MX records with /mx) generated more than
3334 one IP address, and the following item turned out to be the local host,
3335 all the secondary addresses of the first item were incorrectly removed
3336 from the list, along with the local host and any following hosts (which
3337 is what is supposed to happen).
3339 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3340 whoever called Exim into the -H file. In the case of the daemon it was
3341 behaving confusingly. When first started, it used values for whoever
3342 started the daemon, but after a SIGHUP it used the Exim user (because it
3343 calls itself on a restart). I have changed the code so that it now always
3346 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3347 message are rejected with the same error (e.g. no authentication or bad
3348 sender address), and a DATA command is nevertheless sent (as can happen
3349 with PIPELINING or a stupid MUA), the error message that was given to the
3350 RCPT commands is included in the rejection of the DATA command. This is
3351 intended to be helpful for MUAs that show only the final error to their
3354 PH/42 Another patch from the Sieve maintainer.
3356 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3357 Eximstats - Fixed some broken HTML links and added missing column headers
3359 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3360 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3362 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3364 PH/43 Yet another patch from the Sieve maintainer.
3366 PH/44 I found a way to check for a TCP/IP connection going away before sending
3367 the response to the final '.' that terminates a message, but only in the
3368 case where the client has not sent further data following the '.'
3369 (unfortunately, this is allowed). However, in many cases there won't be
3370 any further data because there won't be any more messages to send. A call
3371 to select() can be used: if it shows that the input is "ready", there is
3372 either input waiting, or the socket has been closed. An attempt to read
3373 the next input character can distinguish the two cases. Previously, Exim
3374 would have sent an OK response which the client would never have see.
3375 This could lead to message repetition. This fix should cure that, at
3376 least in a lot of common cases.
3378 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3379 advertised in response to EHLO.
3385 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3386 fixed by 4.65/MH/01 (is this a record?) are fixed:
3388 (i) An empty string was always treated as zero by the numeric comparison
3389 operators. This behaviour has been restored.
3391 (ii) It is documented that the numeric comparison operators always treat
3392 their arguments as decimal numbers. This was broken in that numbers
3393 starting with 0 were being interpreted as octal.
3395 While fixing these problems I realized that there was another issue that
3396 hadn't been noticed. Values of message_size_limit (both the global option
3397 and the transport option) were treated as octal if they started with 0.
3398 The documentation was vague. These values are now always treated as
3399 decimal, and I will make that clear in the documentation.
3405 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3406 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3409 MH/01 Don't check that the operands of numeric comparison operators are
3410 integers when their expansion is in "skipping" mode (fixes bug
3411 introduced by 4.64-PH/07).
3413 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3414 child addresses, Exim now panics and dies. Previously, because the count
3415 is held in a short int, deliveries were likely to be lost. As such a
3416 large number of recipients for a single message is ridiculous
3417 (performance will be very, very poor), I have chosen to impose a limit
3418 rather than extend the field.
3424 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3425 leftover -K file (the existence of which was triggered by #402).
3426 While we were at it, introduced process PID as part of the -K
3427 filename. This should rule out race conditions when creating
3430 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3431 processing considerably. Previous code took too long for large mails,
3432 triggering a timeout which in turn triggers #401.
3434 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3435 in the DK code in transports.c. sendfile() is not really portable,
3436 hence the _LINUX specificness.
3438 TF/01 In the add_headers option to the mail command in an Exim filter,
3439 there was a bug that Exim would claim a syntax error in any
3440 header after the first one which had an odd number of characters
3443 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3444 callout verification, Exim cached a "reject" for the entire domain. This
3445 is correct for most verifications, but it is not correct for a recipient
3446 verification with use_sender or use_postmaster set, because in that case
3447 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3448 case of MAIL FROM:<> rejection from other early rejections (e.g.
3449 rejection of HELO). When verifying a recipient using a non-null MAIL
3450 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3451 Whatever the result of the callout, the value of the domain cache is
3452 left unchanged (for any other kind of callout, getting as far as trying
3453 RCPT means that the domain itself is ok).
3455 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3458 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3459 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3460 session, the daemon ignores ECONNECT errors and logs others; it now
3461 ignores EPIPE as well.
3463 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3464 (quoted-printable decoding).
3466 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3467 later the small subsequent patch to fix an introduced bug.
3469 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3471 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3473 PH/08 An error is now given if message_size_limit is specified negative.
3475 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3476 to be given (somewhat) arbitrary names.
3478 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3481 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3482 miscellaneous code fixes
3484 PH/10 Added the log_reject_target ACL modifier to specify where to log
3487 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3488 hostname. This is wrong, because it relates to the incoming message (and
3489 probably the interface on which it is arriving) and not to the outgoing
3490 callout (which could be using a different interface). This has been
3491 changed to use the value of the helo_data option from the smtp transport
3492 instead - this is what is used when a message is actually being sent. If
3493 there is no remote transport (possible with a router that sets up host
3494 addresses), $smtp_active_hostname is used.
3496 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3497 tweaks were necessary in order to get it to work (see also 21 below):
3498 (a) The code assumed that strncpy() returns a negative number on buffer
3499 overflow, which isn't the case. Replaced with Exim's string_format()
3501 (b) There were several signed/unsigned issues. I just did the minimum
3502 hacking in of casts. There is scope for a larger refactoring.
3503 (c) The code used strcasecmp() which is not a standard C function.
3504 Replaced with Exim's strcmpic() function.
3505 (d) The code set only $1; it now sets $auth1 as well.
3506 (e) A simple test gave the error "authentication client didn't specify
3507 service in request". It would seem that Dovecot has changed its
3508 interface. Fortunately there's a specification; I followed it and
3509 changed what the client sends and it appears to be working now.
3511 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3514 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3515 address A is aliased to B and C, where B exists and C does not. Without
3516 -v the output is "A verified" because verification stops after a
3517 successful redirection if more than one address is generated. However,
3518 with -v the child addresses are also verified. Exim was outputting "A
3519 failed to verify" and then showing the successful verification for C,
3520 with its parentage. It now outputs "B failed to verify", showing B's
3521 parentage before showing the successful verification of C.
3523 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3524 look up a TXT record in a specific list after matching in a combined
3527 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3528 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3529 they consult the DNS. I had assumed they would set it the way they
3530 wanted; and indeed my experiments on Linux seem to show that in some
3531 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3532 To be on the safe side, however, I have now made the interface to
3533 host_find_byname() similar to host_find_bydns(), with an argument
3534 containing the DNS resolver options. The host_find_byname() function now
3535 sets these options at its start, just as host_find_bydns() does. The smtp
3536 transport options dns_qualify_single and dns_search_parents are passed to
3537 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3538 of host_find_byname() use the default settings of RES_DEFNAMES
3539 (qualify_single) but not RES_DNSRCH (search_parents).
3541 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3542 spool_read_header() do less string testing, by means of a preliminary
3543 switch on the second character of optional "-foo" lines. (This is
3544 overdue, caused by the large number of possibilities that now exist.
3545 Originally there were few.) While I was there, I also converted the
3546 str(n)cmp tests so they don't re-test the leading "-" and the first
3547 character, in the hope this might squeeze out yet more improvement.
3549 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3550 flag allowing group syntax was set by the header_syntax check but not
3551 turned off, possible causing trouble later; (2) The flag was not being
3552 set at all for the header_verify test, causing "group"-style headers to
3553 be rejected. I have now set it in this case, and also caused header_
3554 verify to ignore an empty address taken from a group. While doing this, I
3555 came across some other cases where the code for allowing group syntax
3556 while scanning a header line wasn't quite right (mostly, not resetting
3557 the flag correctly in the right place). These bugs could have caused
3558 trouble for malformed header lines. I hope it is now all correct.
3560 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3561 with the "reply" argument non-NULL. The code, however (which originally
3562 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3563 but it didn't always do it. This confused somebody who was copying the
3564 code for some other use. I have removed all the tests.
3566 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3567 feature that was used to support insecure browsers during the U.S. crypto
3568 embargo. It requires special client support, and Exim is probably the
3569 only MTA that supported it -- and would never use it because real RSA is
3570 always available. This code has been removed, because it had the bad
3571 effect of slowing Exim down by computing (never used) parameters for the
3572 RSA_EXPORT functionality.
3574 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3575 authenticator to fail if there's a tab character in the incoming data
3576 (there should never be unless someone is messing about, as it's supposed
3577 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3578 if the connection is using TLS or if the remote IP is the same as the
3579 local IP, and the "valid-client-cert option" if a client certificate has
3582 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3583 authenticators. This can be used for authorization after authentication
3584 succeeds. (In the case of plaintext, it servers for both authentication
3587 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3588 if any retry times were supplied.
3590 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3591 connection, where there is no client IP address to check. In this
3592 situation, the verify now always succeeds.
3594 PH/25 Applied John Jetmore's -Mset patch.
3596 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3598 PH/27 In a string expansion for a processed (not raw) header when multiple
3599 headers of the same name were present, leading whitespace was being
3600 removed from all of them, but trailing whitespace was being removed only
3601 from the last one. Now trailing whitespace is removed from each header
3602 before concatenation. Completely empty headers in a concatenation (as
3603 before) are ignored.
3605 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3606 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3608 PH/29 [Removed. This was a change that I later backed out, and forgot to
3609 correct the ChangeLog entry (that I had efficiently created) before
3610 committing the later change.]
3612 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3613 address errors (4xx response to RCPT) over the same connection as other
3614 messages routed to the same hosts. Such deliveries are always "forced",
3615 so retry times are not inspected. This resulted in far too many retries
3616 for the affected addresses. The effect occurred only when there were more
3617 hosts than the hosts_max_try setting in the smtp transport when it had
3618 the 4xx errors. Those hosts that it had tried were not added to the list
3619 of hosts for which the message was waiting, so if all were tried, there
3620 was no problem. Two fixes have been applied:
3622 (i) If there are any address or message errors in an SMTP delivery, none
3623 of the hosts (tried or untried) are now added to the list of hosts
3624 for which the message is waiting, so the message should not be a
3625 candidate for sending over the same connection that was used for a
3626 successful delivery of some other message. This seems entirely
3627 reasonable: after all the message is NOT "waiting for some host".
3628 This is so "obvious" that I'm not sure why it wasn't done
3629 previously. Hope I haven't missed anything, but it can't do any
3630 harm, as the worst effect is to miss an optimization.
3632 (ii) If, despite (i), such a delivery is accidentally attempted, the
3633 routing retry time is respected, so at least it doesn't keep
3634 hammering the server.
3636 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3637 in ${readsocket because some servers need this prod.
3639 PH/32 Added some extra debug output when updating a wait-xxx database.
3641 PH/33 The hint "could be header name not terminated by colon", which has been
3642 given for certain expansion errors for a long time, was not being given
3643 for the ${if def:h_colon_omitted{... case.
3645 PH/34 The spec says: "With one important exception, whenever a domain list is
3646 being scanned, $domain contains the subject domain." There was at least
3647 one case where this was not true.
3649 PH/35 The error "getsockname() failed: connection reset by peer" was being
3650 written to the panic log as well as the main log, but it isn't really
3651 panic-worthy as it just means the connection died rather early on. I have
3652 removed the panic log writing for the ECONNRESET error when getsockname()
3655 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3656 runs only) independently of the message's sender address. This meant
3657 that, if the 4xx error was in fact related to the sender, a different
3658 message to the same recipient with a different sender could confuse
3659 things. In particular, this can happen when sending to a greylisting
3660 server, but other circumstances could also provoke similar problems.
3661 I have changed the default so that the retry time for these errors is now
3662 based a combination of the sender and recipient addresses. This change
3663 can be overridden by setting address_retry_include_sender=false in the
3666 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3667 remote server are returned as part of bounce messages. This was not
3668 happening for LMTP over a pipe (the lmtp transport), but now it is the
3669 same for both kinds of LMTP.
3671 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3672 in header lines that were in fact CNAMEs. This is no longer the case.
3674 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3675 and queue runs started by the daemon processed all messages. This has
3676 been fixed so that -R and -S can now usefully be given with -q<time>.
3678 PH/40 Import PCRE release 6.7 (fixes some bugs).
3680 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3682 PH/42 Give an error if -q is specified more than once.
3684 PH/43 Renamed the variables $interface_address and $interface_port as
3685 $received_ip_address and $received_port, to make it clear that these
3686 values apply to message reception, and not to the outgoing interface when
3687 a message is delivered. (The old names remain recognized, of course.)
3689 PH/44 There was no timeout on the connect() call when using a Unix domain
3690 socket in the ${readsocket expansion. There now is.
3692 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3693 be meaningful with "accept".
3695 SC/01 Eximstats V1.43
3696 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3698 SC/02 Eximstats V1.44
3699 Use a glob alias rather than an array ref in the generated
3700 parser. This improves both readability and performance.
3702 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3703 Collect SpamAssassin and rejection statistics.
3704 Don't display local sender or destination tables unless
3705 there is data to show.
3706 Added average volumes into the top table text output.
3708 SC/04 Eximstats V1.46
3709 Collect data on the number of addresses (recipients)
3710 as well as the number of messages.
3712 SC/05 Eximstats V1.47
3713 Added 'Message too big' to the list of mail rejection
3714 reasons (thanks to Marco Gaiarin).
3716 SC/06 Eximstats V1.48
3717 Mainlog lines which have GMT offsets and are too short to
3718 have a flag are now skipped.
3720 SC/07 Eximstats V1.49 (Alain Williams)
3721 Added the -emptyok flag.
3723 SC/08 Eximstats V1.50
3724 Fixes for obtaining the IP address from reject messages.
3726 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3727 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3728 whitespace changes from 4.64-PH/27
3730 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3733 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3734 are found, allow negative numbers in numeric criteria)
3736 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3738 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3739 to match changes made in 4.64-PH/43
3741 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3743 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3744 "domain" is actually an IP address, and force a failure. This locks out
3745 those revolvers/nameservers that support "A-for-A" lookups, in
3746 contravention of the specifications.
3748 PH/48 When a host name was looked up from an IP address, and the subsequent
3749 forward lookup of the name timed out, the host name was left in
3750 $sender_host_name, contrary to the specification.
3752 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3753 restricted to single-key lookups, Exim was not diagnosing an error if
3754 * or *@ was used with a query-style lookup.
3756 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3758 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3759 long ago, but noone interested enough thought of it. Let's just say that
3760 the "1.1" means that there are some new functions that weren't there at
3761 some point in the past.
3763 PH/51 Error processing for expansion failure of helo_data from an smtp
3764 transport during callout processing was broken.
3766 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3767 tested/used via the -bh/-bhc/-bs options.
3769 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3770 bug, fixed in subsequent PCRE releases).
3772 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3773 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3775 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3781 SC/01 Use a glob alias rather than an array ref in eximstats generated
3782 parser. This improves both readability and performance.
3784 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3785 Don't display local sender or destination tables in eximstats unless
3786 there is data to show.
3787 Added average volumes into the eximstats top table text output.
3789 SC/03 Collect data on the number of addresses (recipients) as well
3790 as the number of messages in eximstats.
3792 TF/01 Correct an error in the documentation for the redirect router. Exim
3793 does (usually) call initgroups() when daemonizing.
3795 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3796 with consistent privilege compared to when running as a daemon.
3798 TF/03 Note in the spec that $authenticated_id is not set for local
3799 submissions from trusted users.
3801 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3802 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3804 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3805 by adding some example configuration directives to the default
3806 configuration file. A little bit of work is required to uncomment the
3807 directives and define how usernames and passwords are checked, but
3808 there is now a framework to start from.
3810 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3811 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3812 without this. I don't know how relevant this is to other LDAP libraries.
3814 PH/02 Add the verb name to the "unknown ACL verb" error.
3816 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3818 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3820 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3821 directory not expanded when it should be if an expanded home directory
3822 was set for the address (which is overridden by the transport).
3824 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3827 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3828 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3829 because it is too late at that time, and has no effect.
3831 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3832 security issue with \' (bugzilla #107). I could not use the
3833 PQescapeStringConn() function, because it needs a PGconn value as one of
3836 PH/08 When testing addresses using -bt, indicate those final addresses that
3837 are duplicates that would not cause an additional delivery. At least one
3838 person was confused, thinking that -bt output corresponded to deliveries.
3839 (Suppressing duplicates isn't a good idea as you lose the information
3840 about possibly different redirections that led to the duplicates.)
3842 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3843 systems where poll() doesn't work, in particular OS X.
3845 PH/10 Added more information to debugging output for retry time not reached.
3847 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3848 operations in malware.c.
3850 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3853 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3854 syslog_duplication set false, log lines that would normally be written
3855 both the the main log and to the reject log were not written to syslog at
3858 PH/14 In the default configuration, change the use of "message" in ACL warn
3859 statements to "add_header".
3861 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3862 not followed by a command (e.g. "seen endif").
3864 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3865 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3868 PH/17 Added extra conditions to the default value of delay_warning_condition
3872 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3873 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3874 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3877 The Auto-Submitted: and various List- headers are standardised, whereas I
3878 don't think Precedence: ever was.
3880 PH/18 Refactored debugging code in route_finduser() to show more information,
3881 in particular, the error code if getpwnam() issues one.
3883 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3884 This is apparently needed in addition to the PH/07 change above to avoid
3885 any possible encoding problems.
3887 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3888 but not after initializing Perl.
3890 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3891 output them only if debugging. By default they are written stderr,
3892 apparently, which is not desirable.
3894 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3897 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3900 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3902 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3903 authenticated or an ident call has been made. Suppress the default
3904 values for $authenticated_id and $authenticated_sender (but permit -oMai
3905 and -oMas) when testing with -bh.
3907 PH/24 Re-jigged the order of the tests in the default configuration so that the
3908 tests for valid domains and recipients precede the DNS black list and CSA
3909 tests, on the grounds that those ones are more expensive.
3911 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3912 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3913 This bug exists in every version of Exim that I still have, right back to
3916 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3917 However, an attempt to turn on case-sensitivity in a regex key by
3918 including (?-i) didn't work because the subject string was already
3919 lowercased, and the effects were non-intuitive. It turns out that a
3920 one-line patch can be used to allow (?-i) to work as expected.
3926 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3927 other effects) broke the use of negated acl sub-conditions.
3929 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3932 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3933 "Deny" causes Exim to reject the incoming connection with a 554 error.
3934 Unfortunately, if there is a major crisis, such as a disk failure,
3935 tcp-wrappers gives "deny", whereas what one would like would be some
3936 kind of temporary error. A kludge has been added to help with this.
3937 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3938 554 error is used if errno is still zero or contains ENOENT (which occurs
3939 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3942 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3944 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3945 errors. Otherwise a message that provokes a temporary error (when other
3946 messages do not) can cause a whole host to time out.
3948 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3949 addresses were routed directly to files or pipes from a redirect router.
3950 File deliveries just didn't batch; pipe deliveries might have suffered
3953 PH/06 A failure to get a lock for a hints database would erroneously always say
3954 "Failed to get write lock", even when it was really a read lock.
3956 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3957 of 0600. This has been changed to use the value of the lockfile_mode
3958 option (which defaults to 0600).
3960 PH/08 Applied small patch from the Sieve maintainer.
3962 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3963 folder from quota calculations, a direct delivery into this folder messed
3964 up the contents of the maildirsize file. This was because the regex was
3965 used only to exclude .Trash (or whatever) when the size of the mailbox
3966 was calculated. There was no check that a delivery was happening into an
3967 excluded directory. This bug has been fixed by ignoring all quota
3968 processing for deliveries into excluded directories.
3970 PH/10 Added the maildirfolder_create_regex option to appendfile.
3976 PH/01 The code for finding all the local interface addresses on a FreeBSD
3977 system running IPv6 was broken. This may well have applied to all BSD
3978 systems, as well as to others that have similar system calls. The broken
3979 code found IPv4 interfaces correctly, but gave incorrect values for the
3980 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3981 that it would not match correctly against @[] and not recognize the IPv6
3984 PH/02 The ipliteral router was not recognizing addresses of the form user@
3985 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3987 PH/03 Added disable_ipv6.
3989 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3990 decoded form, because it is most often used to construct To: headers
3991 lines in autoreplies, and the decoded form may well be syntactically
3992 invalid. However, $reply_address has leading white space removed, and all
3993 newlines turned into spaces so that the autoreply transport does not
3996 PH/05 If group was specified without a user on a router, and no group or user
3997 was specified on a transport, the group from the router was ignored.
3999 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4000 for visible compile-time settings that can be used to change these
4001 numbers, for those that want even more. Backwards compatibility with old
4002 spool files has been maintained. However, going back to a previous Exim
4003 release will lost any variables that are in spool files.
4005 PH/07 Two small changes when running in the test harness: increase delay when
4006 passing a TCP/IP connection to a new process, in case the original
4007 process has to generate a bounce, and remove special handling of
4008 127.0.0.2 (sic), which is no longer necessary.
4010 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4011 be the same on different OS.
4013 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4016 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4017 whether --show-vars was specified or not
4019 JJ/02 exipick: Added support for new ACL variable spool format introduced
4022 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4023 syntactically invalid From: or Reply-to: line, and a filter used this to
4024 generate an autoreply, and therefore failed to obtain an address for the
4025 autoreply, Exim could try to deliver to a non-existent relative file
4026 name, causing unrelated and misleading errors. What now happens is that
4027 it logs this as a hard delivery error, but does not attempt to create a
4030 PH/11 The exinext utility has a -C option for testing purposes, but although
4031 the given file was scanned by exinext itself; it wasn't being passed on
4032 when Exim was called.
4034 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4035 an end-of-file indication when reading a command response.
4037 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4038 compiled. In many other places in Exim, IPv6 addresses are always
4039 recognized, so I have changed this. It also means that IPv4 domain
4040 literals of the form [IPV4:n.n.n.n] are now always recognized.
4042 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4043 used if the router is not running as root, for example, when verifying at
4044 ACL time, or when using -bh. The debugging output from this situation was
4045 non-existent - all you got was a failure to exec. I have made two
4048 (a) Failures to set uid/gid, the current directory, or a process leader
4049 in a subprocess such as that created by queryprogram now generate
4050 suitable debugging output when -d is set.
4052 (b) The queryprogram router detects when it is not running as root,
4053 outputs suitable debugging information if -d is set, and then runs
4054 the subprocess without attempting to change uid/gid.
4056 PH/15 Minor change to Makefile for building test_host (undocumented testing
4059 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4060 additional section of a DNS packet that returns MX or SRV records.
4061 Instead, it always explicitly searches for A/AAAA records. This avoids
4062 major problems that occur when a DNS server includes only records of one
4063 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4064 fixed another bug: if SRV records were looked up and the corresponding
4065 address records were *not* found in the additional section, the port
4066 values from the SRV records were lost.
4068 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4069 using the correct key (the original address) when searching the retry
4070 rules in order to find which one to use for generating the retry hint.
4072 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4073 adding the default one. Similarly, if it contains a Reply-To: header, the
4074 errors_reply_to option, if set, is not used.
4076 PH/19 When calculating a retry time, Exim used to measure the "time since
4077 failure" by looking at the "first failed" field in the retry record. Now
4078 it does not use this if it is later than than the arrival time of the
4079 message. Instead it uses the arrival time. This makes for better
4080 behaviour in cases where some deliveries succeed, thus re-setting the
4081 "first failed" field. An example is a quota failure for a huge message
4082 when small messages continue to be delivered. Without this change, the
4083 "time since failure" will always be short, possible causing more frequent
4084 delivery attempts for the huge message than are intended.
4085 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4087 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4088 $1, $2, $3) because the numerical variables can be reset during some
4089 expansion items (e.g. "match"), thereby losing the authentication data.
4091 PH/21 Make -bV show the size of off_t variables so that the test suite can
4092 decide whether to run tests for quotas > 2G.
4094 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4095 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4096 filecount value is greater than 2G or if a quota value is greater than 2G
4097 on a system where the size of off_t is not greater than 4, a panic error
4100 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4101 never match. The debug and -bh output now contains an explicit error
4102 message indicating a malformed IPv4 address or mask.
4104 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4105 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4106 PH/23 above applies.
4108 PH/25 Do not write to syslog when running in the test harness. The only
4109 occasion when this arises is a failure to open the main or panic logs
4110 (for which there is an explicit test).
4112 PH/26 Added the /no_tell option to "control=freeze".
4114 PH/27 If a host name lookup failed very early in a connection, for example, if
4115 the IP address matched host_lookup and the reverse lookup yielded a name
4116 that did not have a forward lookup, an error message of the form "no IP
4117 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4118 could be logged. Now it outputs the IP address instead of "NULL".
4120 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4121 allows the sender and the authenticated sender to be set when
4122 submitting a message from within Exim. Since child_open_exim() is
4123 documented for local_scan(), the new function should be too.
4125 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4126 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4127 results in an empty string is now treated as unset.
4129 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4131 PH/31 Added sender_verify_fail logging option.
4133 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4134 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4135 tidied the source and removed it altogether.
4137 PH/33 When a queue run was abandoned because the load average was too high, a
4138 log line was always written; now it is written only if the queue_run log
4139 selector is set. In addition, the log line for abandonment now contains
4140 information about the queue run such as the pid. This is always present
4141 in "start" and "stop" lines but was omitted from the "abandon" line.
4143 PH/34 Omit spaces between a header name and the colon in the error message that
4144 is given when verify = headers_syntax fails (if there are lots of them,
4145 the message gets confusing).
4147 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4148 names, as there are now some PTR records that contain slashes. This check
4149 is only to protect against broken name servers that fall over on strange
4150 characters, so the fact that it applies to all lookups doesn't matter.
4152 PH/36 Now that the new test suite is complete, we can remove some of the
4153 special code in Exim that was needed for the old test suite. For example,
4154 sorting DNS records because real resolvers return them in an arbitrary
4155 order. The new test suite's fake resolver always returns records in the
4158 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4159 bounces) except when queue_only is set, to avoid logging races between
4160 the different processes.
4162 PH/38 Panic-die if .include specifies a non-absolute path.
4164 PH/39 A tweak to the "H" retry rule from its user.
4166 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4167 a label. They prevented compilation on older perls.
4169 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4170 a warning to be raised on newish perls.
4172 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4173 on queue. Changes to match documented behaviour of showing count of
4174 messages matching specified criteria.
4176 PH/40 Changed the default ident timeout from 30s to 5s.
4178 PH/41 Added support for the use of login_cap features, on those BSD systems
4179 that have them, for controlling the resources used by pipe deliveries.
4181 PH/42 The content-scanning code uses fopen() to create files in which to put
4182 message data. Previously it was not paying any attention to the mode of
4183 the files. Exim runs with umask(0) because the rest of the code creates
4184 files with open(), and sets the required mode explicitly. Thus, these
4185 files were ending up world-writeable. This was not a big issue, because,
4186 being within the spool directory, they were not world-accessible. I have
4187 created a function called modefopen, which takes an additional mode
4188 argument. It sets umask(777), creates the file, chmods it to the required
4189 mode, then resets the umask. All the relevant calls to fopen() in the
4190 content scanning code have been changed to use this function.
4192 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4193 to 24 hours. This avoids potential overflow problems when processing G
4194 and H retry rules. I suspect nobody ever tinkers with this value.
4196 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4198 PH/45 When the plaintext authenticator is running as a client, the server's
4199 challenges are checked to ensure they are valid base64 strings. By
4200 default, the authentication attempt is cancelled if an invalid string is
4201 received. Setting client_ignore_invalid_base64 true ignores these errors.
4202 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4203 they are received. Thus, the responses can be made to depend on the
4204 challenges. If an invalid string is ignored, an empty string is placed in
4207 PH/46 Messages that are created by the autoreply transport now contains a
4208 References: header, in accordance with RFCs 2822 and 3834.
4210 PH/47 Added authenticated_sender_force to the smtp transport.
4212 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4214 PH/49 Installed latest patch from the Sieve maintainer.
4216 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4217 was also set, the appendfile transport was unnecessarily scanning a
4218 directory of message files (e.g. for maildir delivery) to find the count
4219 of files (along with the size), even though it did not need this
4220 information. It now does the scan only if it needs to find either the
4221 size of the count of files.
4223 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4225 PH/52 Two bugs concerned with error handling when the smtp transport is
4228 (i) Exim was not creating retry information for temporary errors given
4229 for individual recipients after the DATA command when the smtp transport
4230 was used in LMTP mode. This meant that they could be retried too
4231 frequently, and not timed out correctly.
4233 (ii) Exim was setting the flag that allows error details to be returned
4234 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4235 recipients that were returned after the DATA command.
4237 PH/53 This is related to PH/52, but is more general: for any failing address,
4238 when detailed error information was permitted to be returned to the
4239 sender, but the error was temporary, then after the final timeout, only
4240 "retry timeout exceeded" was returned. Now it returns the full error as
4241 well as "retry timeout exceeded".
4243 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4244 do this, and (what is worse) MTAs that accept it.
4246 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4247 will now be deprecated.
4249 PH/56 New os.c-cygwin from the Cygwin maintainer.
4251 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4252 formats (previously only available in exim formats via -bpr, -bpru,
4253 and -bpra. Now also available in native and exiqgrep formats)
4255 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4256 with very large, slow to parse queues
4258 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4260 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4262 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4263 responses to authentication challenges, though it was showing the
4264 challenges; (ii) I've removed the CR characters from the debug output for
4267 PH/58 Allow for the insertion of a newline as well as a space when a string
4268 is turned into more than one encoded-word during RFC 2047 encoding. The
4269 Sieve code now uses this.
4271 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4272 data_4xx, lost_connection, tls_required.
4274 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4275 message was being sent as an SMTP response.
4277 PH/61 Add -l and -k options to exicyclog.
4279 PH/62 When verifying, if an address was redirected to one new address, so that
4280 verification continued, and the new address failed or deferred after
4281 having set something in $address_data, the value of $address_data was not
4282 passed back to the ACL. This was different to the case when no
4283 redirection occurred. The value is now passed back in both cases.
4285 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4286 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4287 use login_cap.h, so on its own it isn't the distinguishing feature. The
4288 new name refers directly to the setclassresources() function.
4290 PH/65 Added configuration files for NetBSD3.
4292 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4294 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4295 is preferred over IPv4.
4297 PH/68 The bounce_return_message and bounce_return_body options were not being
4298 honoured for bounces generated during the reception of non-SMTP messages.
4299 In particular, this applied to messages rejected by the ACL. This bug has
4300 been fixed. However, if bounce_return_message is true and bounce_return_
4301 body is false, the headers that are returned for a non-SMTP message
4302 include only those that have been read before the error was detected.
4303 (In the case of an ACL rejection, they have all been read.)
4305 PH/69 The HTML version of the specification is now built in a directory called
4306 spec_html instead of spec.html, because the latter looks like a path with
4307 a MIME-type, and this confuses some software.
4309 PH/70 Catch two compiler warnings in sieve.c.
4311 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4312 function verify_get_ident() calls ip_connect() to connect a socket, but
4313 if the "connect()" function timed out, ip_connect() used to close the
4314 socket. However, verify_get_ident() also closes the socket later, and in
4315 between Exim writes to the log, which may get opened at this point. When
4316 the socket was closed in ip_connect(), the log could get the same file
4317 descriptor number as the socket. This naturally causes chaos. The fix is
4318 not to close the socket in ip_connect(); the socket should be closed by
4319 the function that creates it. There was only one place in the code where
4320 this was missing, in the iplookup router, which I don't think anybody now
4321 uses, but I've fixed it anyway.
4323 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4324 well as to direct DNS lookups. Otherwise the handling of names in host
4325 lists is inconsistent and therefore confusing.
4331 PH/01 Two changes to the default runtime configuration:
4333 (1) Move the checks for relay_from_hosts and authenticated clients from
4334 after to before the (commented out) DNS black list checks.
4336 (2) Add control=submission to the relay_from_hosts and authenticated
4337 clients checks, on the grounds that messages accepted by these
4338 statements are most likely to be submissions.
4340 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4342 (1) Generate an error if the third argument for the ${prvs expansion is
4345 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4348 (3) Reset the variables that are obtained from the first argument of
4349 ${prvscheck and used in the second argument before leaving the code,
4350 because their memory is reclaimed, so using them afterwards may do
4353 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4354 one (it's much easier than Tom thought :-).
4356 (5) Because of (4), we can now allow for the use of $prvscheck_result
4357 inside the third argument.
4359 PH/03 For some reason, the default setting of PATH when running a command from
4360 a pipe transport was just "/usr/bin". I have changed it to
4363 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4364 anything to be listed in the output from -bV.
4366 PH/05 When a filter generated an autoreply, the entire To: header line was
4367 quoted in the delivery log line, like this:
4369 => >A.N.Other <ano@some.domain> <original@ddress> ...
4371 This has been changed so that it extracts the operative address. There
4372 may be more than one such address. If so, they are comma-separated, like
4375 => >ano@some.domain,ona@other.domain <original@ddress> ...
4377 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4378 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4379 not being looked up in the rDNS to get a host name, Exim was showing the
4380 IP address twice in Received: lines, even though the IP addresses were
4381 identical. For example:
4383 Received: from [1.2.3.4] (helo=[1.2.3.4])
4385 However, if the real host name was known, it was omitting the HELO data
4386 if it matched the actual IP address. This has been tidied up so that it
4387 doesn't show the same IP address twice.
4389 PH/07 When both +timestamp and +memory debugging was on, the value given by
4390 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4391 called by the debug printing, thereby overwriting the timestamp buffer.
4392 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4394 PH/08 When the original message was included in an autoreply transport, it
4395 always said "this is a copy of the message, including all the headers",
4396 even if body_only or headers_only was set. It now gives an appropriate
4399 PH/09 Applied a patch from the Sieve maintainer which:
4401 o fixes some comments
4402 o adds the (disabled) notify extension core
4403 o adds some debug output for the result of if/elsif tests
4404 o points to the current vacation draft in the documentation
4405 and documents the missing references header update
4409 o fixes a bug in processing the envelope test (when testing
4410 multiple envelope elements, the last element determined the
4413 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4414 Electronic Mail") by including:
4416 Auto-submitted: auto-generated
4418 in the messages that it generates (bounce messages and others, such as
4419 warnings). In the case of bounce messages for non-SMTP messages, there was
4420 also a typo: it was using "Auto_submitted" (underscore instead of
4421 hyphen). Since every message generated by Exim is necessarily in response
4422 to another message, thes have all been changed to:
4424 Auto-Submitted: auto-replied
4426 in accordance with these statements in the RFC:
4428 The auto-replied keyword:
4430 - SHOULD be used on messages sent in direct response to another
4431 message by an automatic process,
4433 - MUST NOT be used on manually-generated messages,
4435 - MAY be used on Delivery Status Notifications (DSNs) and Message
4436 Disposition Notifications (MDNs),
4438 - MUST NOT be used on messages generated by automatic or periodic
4439 processes, except for messages which are automatic responses to
4442 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4443 to the default Received: header definition.
4445 PH/12 Added log selector acl_warn_skipped (default on).
4447 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4448 variables because (a) they are in the wrong storage pool and (b) even if
4449 they were copied, it wouldn't work properly because of the caching.
4451 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4452 checking when decoding. Apparently there are clients that generate
4453 overlong encoded strings. Why am I not surprised?
4455 PH/15 If the first argument of "${if match_address" was not empty, but did not
4456 contain an "@" character, Exim crashed. Now it writes a panic log message
4457 and treats the condition as false.
4459 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4461 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4462 extension "envelope-auth". The code is finished and in agreement with
4463 other implementations, but there is no documentation so far and in fact,
4464 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4465 not changing the active code.
4467 Print executed "if" and "elsif" statements when debugging is used. This
4468 helps a great deal to understand what a filter does.
4470 Document more things not specified clearly in RFC3028. I had all this
4471 sorted out, when out of a sudden new issues came to my mind. Oops."
4473 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4476 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4477 canonical form (as documented). However, after a host name lookup from
4478 the IP address, check_host() was doing a simple string comparison with
4479 addresses acquired from the DNS when checking that the found name did
4480 have the original IP as one of its addresses. Since any found IPv6
4481 addresses are likely to be in abbreviated form, the comparison could
4482 fail. Luckily, there already exists a function for doing the comparison
4483 by converting both addresses to binary, so now that is used instead of
4484 the text comparison.
4486 PH/20 There was another similar case to PH/19, when a complete host name was
4487 given in a host list; looking up its IP address could give an abbreviated
4488 form, whereas the current host's name might or might not be abbreviated.
4489 The same fix has been applied.
4495 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4496 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4499 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4500 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4502 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4504 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4505 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4506 Also, for "Auto-Submitted", treat anything other than "no" as
4507 non-personal, in accordance with RFC 3834. (Previously it treated
4508 anything starting "auto-" as non-personal.)
4510 TF/01 The control=submission/name=... option had a problem with syntax
4511 errors if the name included a slash character. The /name= option
4512 now slurps the rest of the string, so it can include any characters
4513 but it must come last in the list of options (after /sender_retain
4516 PH/05 Some modifications to the interface to the fake nameserver for the new
4524 TK/01 Added the "success_on_redirect" address verification option. See
4525 NewStuff for rationale and an example.
4527 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4529 PH/02 Patch to exigrep to allow it to work on syslog lines.
4531 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4532 fread() to skip over the body file's header line, because in Cygwin the
4533 header line is locked and is inaccessible.
4535 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4536 co-exist for some time) to make it clear that it is the Exim ID that is
4537 referenced, not the Message-ID: header line.
4539 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4540 string_format() function, because snprintf() does not exist on all
4543 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4544 ${stat: expansion item.
4546 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4547 protocol synchronization error", to keep the pedants happy.
4549 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4550 well as for IRIX systems, when gcc is being used. See the host.c source
4553 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4555 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4558 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4559 transport and to the smtp transport in LMTP mode.
4561 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4563 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4564 run a filter in a subprocess. This could lead to confusion in subsequent
4565 lookups in the parent process. There should also be a search_tidyup() at
4566 the end of the subprocess.
4568 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4569 only if the host matched helo_try_verify_hosts, which caused the
4570 verification to occur when the EHLO/HELO command was issued. The ACL just
4571 tested the remembered result. Now, if a previous verification attempt has
4572 not happened, "verify = helo" does it there and then.
4574 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4576 TK/03 Fix log output including CR from clamd.
4578 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4579 exist provoked a memory error which could cause a segfault.
4581 PH/15 Installed PCRE 6.2
4583 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4585 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4586 of the problem. Specifically, suggested +O2 rather than +O1 for the
4589 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4591 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4592 record, the port was not correctly logged when the outgoing_port log
4593 selector was set (it logged the transort's default port).
4595 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4596 fallback_hosts, and "hosts" in the smtp transport.
4598 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4599 host errors such as "Connection refused".
4601 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4602 authentication with radiusclient 0.4.9:
4604 - Error returned from rc_read_config was caught wrongly
4605 - Username/password not passed on to radius server due to wrong length.
4607 The presumption is that some radiusclient API changes for 4.51/PH/17
4608 were not taken care of correctly. The code is still untested by me (my
4609 Linux distribution still has 0.3.2 of radiusclient), but it was
4610 contributed by a Radius user.
4612 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4613 expanding the "port" option of the smtp transport.
4615 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4616 while reading a MIME header. Thanks to Tom Hughes for a patch.
4618 PH/24 Include config.h inside local_scan.h so that configuration settings are
4621 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4622 that in an ACL for RCPT (for example), you can examine exactly what was
4625 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4626 commands, but it was not correctly comparing the address with the actual
4627 client host address. Thus, it would show the EHLO address in Received:
4628 header lines when this was not necessary.
4630 PH/27 Added the % operator to ${eval:}.
4632 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4633 it should be ignoring failures (because with -C, for example, it has lost
4634 privilege). It wasn't ignoring creation failures other than "already
4637 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4640 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4641 because an input line was too long, either on its own, or by virtue of
4642 too many continuations, the temporary file was not being removed, and the
4643 return code was incorrect.
4645 PH/31 Missing "BOOL" in function definition in filtertest.c.
4647 PH/32 Applied Sieve patches from the maintainer.
4649 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4651 PH/33 Added "verify = not_blind".
4653 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4654 Local/Makefile (with some defaults set). These are used in built scripts
4655 such as exicyclog, but they have never been used in the exim_install
4656 script (though there are many overriding facilities there). I have
4657 arranged that the exim_install script now takes note of these two
4660 PH/35 Installed configuration files for Dragonfly.
4662 PH/36 When a locally submitted message by a trusted user did not contain a
4663 From: header, and the sender address was obtained from -f or from an SMTP
4664 MAIL command, and the trusted user did not use -F to supply a sender
4665 name, $originator_name was incorrectly used when constructing a From:
4666 header. Furthermore, $originator_name was used for submission mode
4667 messages from external hosts without From: headers in a similar way,
4668 which is clearly wrong.
4670 PH/37 Added control=suppress_local_fixups.
4672 PH/38 When log_selector = +received_sender was set, and the addition of the
4673 sender made the log line's construction buffer exactly full, or one byte
4674 less than full, an overflow happened when the terminating "\n" was
4677 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4678 when the result of a list match is failure because a DNS lookup failed.
4680 PH/40 RM_COMMAND is now used in the building process.
4682 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4683 the "build-* directories that it finds.
4685 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4686 address in a domain literal was a prefix of an interface address.
4688 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4689 when verifying a sender address, unless rewrite_headers is false.
4691 PH/44 Wrote a long comment about why errors_to addresses are verified as
4692 recipients, not senders.
4694 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4695 the ratelimit ACL was added.
4697 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4699 PH/46 Added extra information about PostgreSQL errors to the error string.
4701 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4702 avoiding the need to install special zones in a real server. This is
4703 backwards compatible; if it can't find the fake resolver, it drops back.
4704 Thus, both old and new test suites can be run.
4706 TF/02 Added util/ratelimit.pl
4708 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4709 clock is set back in time.
4711 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4712 Candler <B.Candler@pobox.com>.
4714 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4715 OK for addresses that are the result of redirections.
4717 PH/48 A number of further additions for the benefit of the new test suite,
4718 including a fake gethostbyname() that interfaces to the fake DNS resolver
4721 TF/06 The fix for widen_domains has also been applied to qualify_single and
4722 search_parents which are the other dnslookup options that can cause
4725 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4728 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4730 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4731 service" if it encountered an MX record with an empty target hostname.
4732 The message is now "an MX or SRV record indicated no SMTP service".
4734 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4735 if the DNS of the sending site is misconfigured. This is quite a
4736 common situation. This change restores the behaviour of treating a
4737 helo verification defer as a failure.
4739 PH/51 If self=fail was set on a router, the bounce message did not include the
4740 actual error message.
4746 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4748 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4749 command itself ended in error, the underlying message about the transport
4750 filter timeout was being overwritten with the pipe command error. Now the
4751 underlying error message should be appended to the second error message.
4753 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4755 PH/02 Reduce the amount of output that "make" produces by default. Full output
4756 can still be requested.
4758 PH/03 The warning log line about a condition test deferring for a "warn" verb
4759 was being output only once per connection, rather than after each
4760 occurrence (because it was using the same function as for successful
4761 "warn" verbs). This seems wrong, so I have changed it.
4763 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4764 it should not have, which might have caused a crash in the right
4765 circumstances, but probably never did.
4767 PH/04 Installed a modified version of Tony Finch's patch to make submission
4768 mode fix the return path as well as the Sender: header line, and to
4769 add a /name= option so that you can make the user's friendly name appear
4772 TF/03 Added the control = fakedefer ACL modifier.
4774 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4775 Mark Lowes for thorough testing.
4777 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4779 TK/03 Merged latest SRS patch from Miles Wilton.
4781 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4782 with the definition in sysexits.h (which is #included earlier).
4783 Fortunately, Exim does not actually use EX_OK. The code used to try to
4784 preserve the sysexits.h value, by assuming that macro definitions were
4785 scanned for macro replacements. I have been disabused of this notion,
4786 so now the code just undefines EX_OK before #including unistd.h.
4788 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4789 in the smtp transport. When a block could not be written in a single
4790 write() function, the timeout was being re-applied to each part-write.
4791 This seems wrong - if the receiver was accepting one byte at a time it
4792 would take for ever. The timeout is now adjusted when this happens. It
4793 doesn't have to be particularly precise.
4795 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4796 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4798 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4799 without a domain if the check to <postmaster@domain> fails.
4801 SC/01 Eximstats: added -xls and the ability to specify output files
4802 (patch written by Frank Heydlauf).
4804 SC/02 Eximstats: use FileHandles for outputting results.
4806 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4808 SC/04 Eximstats: fixed display of large numbers with -nvr option
4810 SC/05 Eximstats: fixed merging of reports with empty tables.
4812 SC/06 Eximstats: added the -include_original_destination flag
4814 SC/07 Eximstats: removed tabs and trailing whitespace.
4816 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4818 TK/06 MBOX spool code: Add real "From " MBOX separator line
4819 so the .eml file is really in mbox format (even though
4820 most programs do not really care). Patch from Alex Miller.
4822 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4823 The latter is generated from $received_to and is only set if the
4824 message has one envelope recipient. SA can use these headers,
4825 obviously out-of-the-box. Patch from Alex Miller.
4827 PH/08 The ${def test on a variable was returning false if the variable's
4828 value was "0", contrary to what the specification has always said!
4829 The result should be true unless the variable is empty.
4831 PH/09 The syntax error of a character other than { following "${if
4832 def:variable_name" (after optional whitespace) was not being diagnosed.
4833 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4834 accidental colon was present, for example, could give incorrect results.
4836 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4837 result is used (not including appendfile, where other changes are about
4840 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4841 This involved changing a lot of size variables from int to off_t. It
4842 should work with maildirs and everything.
4844 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4845 spamd dying while we are connected to it.
4847 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4850 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4851 function for BDB 4.3.
4853 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4855 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4856 the sources for PCRE have been re-arranged and more files are now
4859 PH/15 The code I had for printing potentially long long variables in PH/11
4860 above was not the best (it lost precision). The length of off_t variables
4861 is now inspected at build time, and an appropriate printing format (%ld
4862 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4863 to be "long long int" or "long int". This is needed for the internal
4864 formatting function string_vformat().
4866 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4867 the configuration file to be ":syslog", then the script "guesses" where
4868 the logs files are, rather than using the compiled in default. In our
4869 case the guess is not the same as the compiled default, so the script
4870 suddenly stopped working when I started to use syslog. The patch checks
4871 to see if log_file_path is "". If so, it attempts to read it from exim
4872 with no configuration file to get the compiled in version, before it
4873 falls back to the previous guessing code."
4875 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4876 implementing BATV in an Exim configuration. See NewStuff for the gory
4879 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4880 Makefile that are specific to HP-UX.
4882 PH/18 If the "use_postmaster" option was set for a recipient callout together
4883 with the "random" option, the postmaster address was used as the MAIL
4884 FROM address for the random test, but not for the subsequent recipient
4885 test. It is now used for both.
4887 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4888 patch removes a few documentation additions to RFC 3028, because the
4889 latest draft now contains them. It adds the new en;ascii-case comparator
4890 and a new error check for 8bit text in MIME parts. Comparator and
4891 require names are now matched exactly. I enabled the subaddress
4892 extension, but it is not well tested yet (read: it works for me)."
4894 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4895 rework some of the code of TK/09 above to avoid the hardwired use of
4896 "%lld" and "long long". Replaced the call to snprintf() with a call to
4899 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4900 records point to non-existent hosts", "retry timeout exceeded", and
4901 "retry time not reached for any host after a long failure period".
4903 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4904 experimental DomainKeys support:
4906 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4907 (2) On an error such as an illegally used "control", the wrong name for
4908 the control was given.
4910 These problems did NOT occur unless DomainKeys support was compiled.
4912 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4914 PH/24 Added ${if match_ip condition.
4916 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4917 databases so that it will be absolutely obvious if a crash occurs in the
4918 DB library. This is a regular occurrence (often caused by mis-matched
4921 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4922 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4923 picked up on a user's system that detects such things. There doesn't seem
4924 to be a gcc warning option for this - only an attribute that has to be
4925 put on the function's prototype. It seems that in Fedora Core 4 they have
4926 set this on a number of new functions. No doubt there will be more in due
4929 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4930 specify a transport. However, if an address that was verified by such a
4931 router was the subject of a callout, Exim crashed because it tried to
4932 read the rcpt_include_affixes from the non-existent transport. Now it
4933 just assumes that the setting of that option is false. This bug was
4934 introduced by 4.51/PH/31.
4936 PH/28 Changed -d+all to exclude +memory, because that information is very
4937 rarely of interest, but it makes the output a lot bigger. People tend to
4938 do -d+all out of habit.
4940 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4941 code in os-type was giving problems when libc.so lives in lib64, like on
4944 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4945 aren't the modern standard, and it seems that some systems' include files
4946 don't always have them. Exim was already checking for some of the newer
4947 ones like T_AAAA, and defining it itself. I've added checks for all the
4948 record types that Exim uses.
4950 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4951 not automatically generating a new one, as it is supposed to. This
4952 prevented TLS from working. If the file did exist, but contained invalid
4953 data, a new version was generated, as expected. It was only the case of a
4954 non-existent file that was broken.
4956 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4957 with a change in libdomainkeys > 0.64.
4959 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4960 from DNS. If the selector record carries the flag, it now has
4961 precedence over the domain-wide flag.
4963 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4965 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4966 the use of a port name that isn't defined in /etc/services) occurred, the
4967 message was deferred as in a normal delivery, and thus remained on the
4968 spool, instead of being failed because of the mua_wrapper setting. This
4969 is now fixed, and I tidied up some of the mua_wrapper messages at the
4972 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4973 the messages in a hash of arrays rather than using individual hashes.
4974 This is a bit cleaner and results in dramatic memory savings, albeit
4975 at a slight CPU cost.
4977 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4978 as requested by Marc Sherman.
4980 SC/10 Eximstats: added histograms for user specified patterns as requested
4983 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4985 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4986 fopen() in the content-scanning modules that did not already have it.
4992 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4993 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4995 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4997 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4999 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5000 to test Sieve filters that use "vacation".
5002 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5003 that changes the way the GnuTLS parameters are stored in the cache file.
5004 The new format can be generated externally. For backward compatibility,
5005 if the data in the cache doesn't make sense, Exim assumes it has read an
5006 old-format file, and it generates new data and writes a new file. This
5007 means that you can't go back to an older release without removing the
5010 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5011 work if there are any delivery delays because "one_time" forces the
5012 parent to be marked "delivered", so its unseen clone is never tried
5013 again. For this reason, Exim now forbids the simultaneous setting of
5016 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5017 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5018 entry if you want to know the details. The fix, however, neglected to
5019 consider the case when local delivery batching is involved. The test for
5020 "previously delivered" was not happening when checking to see if an
5021 address could be batched with a previous (undelivered) one; under
5022 certain circumstances this could lead to multiple deliveries to the same
5025 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5026 in its include files, and this causes problems building Exim.
5028 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5029 header_syntax) but Exim was just ignoring anything given after a slash.
5030 In particular, this caused confusion with an attempt to use "verify =
5031 reverse_host_lookup/defer_ok". An error is now given when options are
5032 supplied for verify items that do not have them. (Maybe reverse_host_
5033 lookup should have a defer_ok option, but that's a different point.)
5035 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5036 defined by RFC 821) to 2048, because there were problems with some AUTH
5037 commands, and RFC 1869 says the size should be increased for extended
5038 SMTP commands that take arguments.
5040 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5043 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5044 "unknown" error; now it says that the functionality isn't in the binary.
5046 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5047 an address' error message when a string expansion fails (syntax or
5048 whatever). Otherwise the password may appear in the log. Following change
5049 PH/42 below, there is no longer a chance of it appearing in a bounce
5052 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5054 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5055 of its addresses was ever tried. (Bugzilla bug #2.)
5057 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5058 the result incorrectly in the debug output. (It correctly added a newline
5059 to what was transported.)
5061 TF/01 Added $received_time.
5063 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5064 commented out examples of how to interface to a virus scanner and to
5065 SpamAssassin. Also added commented examples of av_scanner and
5066 spamd_address settings.
5068 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5069 and controls are allowed in which ACLs. There were a couple of minor
5070 errors. Some of the entries in the conditions table (which is a table of
5071 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5072 negation of where the condition IS allowed.
5074 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5076 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5077 header file does not have a version number, so I've had to invent a new
5078 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5079 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5080 radiusclient), but it was contributed by a Radius user.
5082 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5083 files or directories, for OpenSSL.
5085 PH/19 When an Exim process that is running as root has to create an Exim log
5086 file, it does so in a subprocess that runs as exim:exim so as to get the
5087 ownership right at creation (otherwise, other Exim processes might see
5088 the file with the wrong ownership). There was no test for failure of this
5089 fork() call, which would lead to the process getting stuck as it waited
5090 for a non-existent subprocess. Forks do occasionally fail when resources
5091 run out. I reviewed all the other calls to fork(); they all seem to check
5094 PH/20 When checking for unexpected SMTP input at connect time (before writing
5095 the banner), Exim was not dealing correctly with a non-positive return
5096 from the read() function. If the client had disconnected by this time,
5097 the result was a log entry for a synchronization error with an empty
5098 string after "input=" when read() returned zero. If read() returned -1
5099 (an event I could not check), uninitialized data bytes were printed.
5100 There were reports of junk text (parts of files, etc) appearing after
5103 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5105 PH/22 Added support for macro redefinition, and (re)definition in between
5106 driver and ACL definitions.
5108 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5109 forgetting to use the resulting value; it was using the unexpanded value.
5111 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5112 hadn't been configured. The fix is from Juergen Kreileder, who
5113 understands it better than I do:
5115 "Here's what I see happening with three configured cyrus_sasl
5116 authenticators configured (plain, login, cram-md5):
5118 On startup auth_cyrus_sasl_init() gets called for each of these.
5119 This means three calls to sasl_listmech() without a specified mech_list.
5120 => SASL tests which mechs of all available mechs actually work
5121 => three warnings about OTP not working
5122 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5124 With the patch, sasl_listmech() also gets called three times. But now
5125 SASL's mech_list option is set to the server_mech specified in the the
5126 authenticator. Or in other words, the answer from sasl_listmech()
5127 gets limited to just the mech you're testing for (which is different
5129 => the return list contains just 'plain' or 'login', 'cram-md5' or
5130 nothing depending on the value of ob->server_mech.
5132 I've just tested the patch: Authentication still works fine,
5133 unavailable mechs specified in the exim configuration are still
5134 caught, and the auth.log warnings about OTP are gone."
5136 PH/25 When debugging is enabled, the contents of the command line are added
5137 to the debugging output, even when log_selector=+arguments is not
5140 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5141 answer is "GNU", and only if the return is "GNU/something" is the answer
5144 PH/27 $acl_verify_message is now set immediately after the failure of a
5145 verification in an ACL, and so is available in subsequent modifiers. In
5146 particular, the message can be preserved by coding like this:
5148 warn !verify = sender
5149 set acl_m0 = $acl_verify_message
5151 Previously, $acl_verify_message was set only while expanding "message"
5152 and "log_message" when a very denied access.
5154 PH/28 Modified OS/os.c-Linux with
5156 -#ifndef OS_LOAD_AVERAGE
5157 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5159 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5160 nomenclature these days.)
5162 PH/29 Installed patch from the Sieve maintainer that adds the options
5163 sieve_useraddress and sieve_subaddress to the redirect router.
5165 PH/30 In these circumstances:
5166 . Two addresses routed to the same list of hosts;
5167 . First host does not offer TLS;
5168 . First host accepts first address;
5169 . First host gives temporary error to second address;
5170 . Second host offers TLS and a TLS session is established;
5171 . Second host accepts second address.
5172 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5173 and peerdn, if requested) that were in fact used only for the second
5176 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5177 attention to any local part prefix or suffix that was matched by the
5178 router that accepted the address. It now behaves in the same way as it
5179 does for delivery: the affixes are removed from the local part unless
5180 rcpt_include_affixes is set on the transport.
5182 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5183 timeout during the DATA phase of an incoming message.
5185 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5186 applied a patch sanctioned by the Sieve maintainer.
5188 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5189 the uid or gid is negative. A case of a negative gid caused this to be
5190 noticed. The fix allows for either to be negative.
5192 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5193 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5196 PH/36 The change PH/12 above was broken. Fixed it.
5198 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5199 the grounds that routing the same address twice would always produce the
5200 same answer. This might have been true once, but it is certainly no
5201 longer true now. Routing a child address may depend on the previous
5202 routing that produced that child. Some complicated redirection strategies
5203 went wrong when messages had multiple recipients, and made Exim's
5204 behaviour dependent on the order in which the addresses were given.
5206 I have moved the duplicate checking until after the routing is complete.
5207 Exim scans the addresses that are assigned to local and remote
5208 transports, and removes any duplicates. This means that more work will be
5209 done, as duplicates will always all be routed, but duplicates are
5210 presumably rare, so I don't expect this is of any significance.
5212 For deliveries to pipes, files, and autoreplies, the duplicate checking
5213 still happens during the routing process, since they are not going to be
5216 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5217 It corrects a timeout issue with spamd. This is Ian's comment: "The
5218 background is that sometimes spamd either never reads data from a
5219 connection it has accepted, or it never writes response data. The exiscan
5220 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5221 blindly assumes that writes won't block so it may never time out."
5223 PH/39 Allow G after quota size as well as K and M.
5225 PH/40 The value set for $authenticated_id in an authenticator may not contain
5226 binary zeroes or newlines because the value is written to log lines and
5227 to spool files. There was no check on this. Now the value is run through
5228 the string_printing() function so that such characters are converted to
5229 printable escape sequences.
5231 PH/41 $message_linecount is a new variable that contains the total number of
5232 lines in the message. Compare $body_linecount, which is the count for the
5235 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5236 bounce and delay warning messages, except in certain special cases, which
5239 (a) An SMTP error message from a remote host;
5240 (b) A message specified in a :fail: redirection;
5241 (c) A message specified in a "fail" command in a system filter;
5242 (d) A message specified in a FAIL return from the queryprogram router;
5243 (e) A message specified by the cannot_route_message router option.
5245 In these cases only, Exim does include the error details in bounce and
5246 warning messages. There are also a few cases where bland messages such
5247 as "unrouteable address" or "local delivery error" are given.
5249 PH/43 $value is now also set for the "else" part of a ${run expansion.
5251 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5252 being worked on, but at least Exim now implements the latest version to
5255 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5256 process to complete was treated as a delivery failure, a timeout while
5257 writing the message to the pipe was logged, but erroneously treated as a
5258 successful delivery. Such timeouts include transport filter timeouts. For
5259 consistency with the overall process timeout, these timeouts are now
5260 treated as errors, giving rise to delivery failures by default. However,
5261 there is now a new Boolean option for the pipe transport called
5262 timeout_defer, which, if set TRUE, converts the failures into defers for
5263 both kinds of timeout. A transport filter timeout is now identified in
5266 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5267 systems where "make" and "gmake" are different, calling "gmake" at top
5268 level broke things. I've arranged for the value of $(MAKE) to be passed
5269 from the Makefile to this script so that it can call the same version of
5273 A note about Exim versions 4.44 and 4.50
5274 ----------------------------------------
5276 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5277 changes of various kinds. As a consequence, a big documentation update was
5278 needed. This delayed the release for rather longer than seemed good, especially
5279 in the light of a couple of (minor) security issues. Therefore, the changes
5280 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5281 release. So 4.44 and 4.50 are in effect two different branches that both start
5284 I have left the 4.50 change log unchanged; it contains all the changes since
5285 4.43. The change log for 4.44 is below; many of its items are identical to
5286 those for 4.50. This seems to be the most sensible way to preserve the
5287 historical information.
5293 1. Minor wording change to the doc/README.SIEVE file.
5295 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5296 computation of the current number of files was incorrect.
5298 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5299 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5302 4. Give more explanation in the error message when the command for a transport
5303 filter fails to execute.
5305 5. There are several places where Exim runs a non-Exim command in a
5306 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5307 was being done only for the command run by the queryprogram router. It is
5308 now done for all such subprocesses. The other cases are: ${run, transport
5309 filters, and the commands run by the lmtp and pipe transports.
5311 6. Added CONFIGURE_GROUP build-time option.
5313 7. Some older OS have a limit of 256 on the maximum number of file
5314 descriptors. Exim was using setrlimit() to set 1000 as a large value
5315 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5316 systems. I've change it so that if it can't get 1000, it tries for 256.
5318 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5319 was an oversight, and furthermore, ever since the addition of extra
5320 controls (e.g. 4.43/32), the checks on when to allow different forms of
5321 "control" were broken. There should now be diagnostics for all cases when a
5322 control that does not make sense is encountered.
5324 9. Added the /retain_sender option to "control=submission".
5326 10. $recipients is now available in the predata ACL (oversight).
5328 11. Tidy the search cache before the fork to do a delivery from a message
5329 received from the command line. Otherwise the child will trigger a lookup
5330 failure and thereby defer the delivery if it tries to use (for example) a
5331 cached ldap connection that the parent has called unbind on.
5333 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5334 of $address_data from the recipient verification was clobbered by the
5335 sender verification.
5337 13. The value of address_data from a sender verification is now available in
5338 $sender_address_data in subsequent conditions in the ACL statement.
5340 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5342 15. Added a new option "connect=<time>" to callout options, to set a different
5345 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5346 was its contents. (It was OK if the option was not defined at all.)
5348 17. A "Completed" log line is now written for messages that are removed from
5349 the spool by the -Mrm option.
5351 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5352 information about exactly what failed.
5354 19. Added -dd to debug only the daemon process.
5356 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5357 handles timeouts, both on the server side and network timeouts. Renamed the
5358 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5360 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5361 It is now set to "smtps".
5363 22. $host_address is now set to the target address during the checking of
5364 ignore_target_hosts.
5366 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5367 being passed; this would have caused $sender_host_name to have been used if
5368 matching the list had actually called for a host name (not very likely,
5369 since this list is usually IP addresses). A host name is now passed as
5372 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5373 code that specifies a non-restarting handler (typically sigaction() in
5374 modern systems) in an attempt to fix a rare and obscure crash bug.
5376 25. Narrowed the window for a race in the daemon that could cause it to ignore
5377 SIGCHLD signals. This is not a major problem, because they are used only to
5378 wake it up if nothing else does.
5380 26. A malformed maildirsize file could cause Exim to calculate negative values
5381 for the mailbox size or file count. Odd effects could occur as a result.
5382 The maildirsize information is now recalculated if the size or filecount
5385 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5386 support for a long time. Removed HAVE_SYS_VFS_H.
5388 28. Installed the latest version of exipick from John Jetmore.
5390 29. In an address list, if the pattern was not a regular expression, an empty
5391 subject address (from a bounce message) matched only if the pattern was an
5392 empty string. Non-empty patterns were not even tested. This was the wrong
5393 because it is perfectly reasonable to use an empty address as part of a
5394 database query. An empty address is now tested by patterns that are
5395 lookups. However, all the other forms of pattern expect the subject to
5396 contain a local part and a domain, and therefore, for them, an empty
5397 address still always fails if the pattern is not itself empty.
5399 30. Exim went into a mad DNS loop when attempting to do a callout where the
5400 host was specified on an smtp transport, and looking it up yielded more
5401 than one IP address.
5403 31. Re-factored the code for checking spool and log partition space into a
5404 function that finds that data and another that does the check. The former
5405 is then used to implement four new variables: $spool_space, $log_space,
5406 $spool_inodes, and $log_inodes.
5408 32. The RFC2047 encoding function was originally intended for short strings
5409 such as real names; it was not keeping to the 75-character limit for
5410 encoded words that the RFC imposes. It now respects the limit, and
5411 generates multiple encoded words if necessary. To be on the safe side, I
5412 have increased the buffer size for the ${rfc2047: expansion operator from
5415 33. It is now permitted to omit both strings after an "if" condition; if the
5416 condition is true, the result is "true". As before, when the second string
5417 is omitted, a false condition yields an empty string. This makes it less
5418 cumbersome to write custom ACL and router conditions.
5420 34. Failure to deliver a bounce message always caused it to be frozen, even if
5421 there was an errors_to setting on the router. The errors_to setting is now
5424 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5425 canonical form (fully expanded) before being placed in
5426 $sender_host_address.
5428 36. The table in the code that translates DNS record types into text (T_A to
5429 "A" for instance) was missing entries for NS and CNAME. It is just possible
5430 that this could have caused confusion if both these types were looked up
5431 for the same domain, because the text type is used as part of Exim's
5432 per-process caching. But the chance of anyone hitting this buglet seems
5435 37. The dnsdb lookup has been extended in a number of ways.
5437 (1) There is a new type, "zns", which walks up the domain tree until it
5438 finds some nameserver records. It should be used with care.
5440 (2) There is a new type, "mxh", which is like "mx" except that it returns
5441 just the host names, not the priorities.
5443 (3) It is now possible to give a list of domains (or IP addresses) to be
5444 looked up. The behaviour when one of the lookups defers can be
5445 controlled by a keyword.
5447 (4) It is now possible to specify the separator character for use when
5448 multiple records are returned.
5450 38. The dnslists ACL condition has been extended: it is now possible to supply
5451 a list of IP addresses and/or domains to be looked up in a particular DNS
5454 39. Added log_selector=+queue_time_overall.
5456 40. When running the queue in the test harness, wait just a tad after forking a
5457 delivery process, to get repeatability of debugging output.
5459 41. Include certificate and key file names in error message when GnuTLS fails
5460 to set them up, because the GnuTLS error message doesn't include the name
5461 of the failing file when there is a problem reading it.
5463 42. Allow both -bf and -bF in the same test run.
5465 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5467 44. The "Exiscan patch" is now merged into the mainline Exim source.
5469 45. Sometimes the final signoff response after QUIT could fail to get
5470 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5471 < 0 before doing a fflush(). This bug looks as though it goes back to the
5472 introduction of TLS in release 3.20, but "sometimes" must have been rare
5473 because the tests only now provoked it.
5475 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5476 (this can affect the format of dates).
5478 47. exim_tidydb, when checking for the continued existence of a message for
5479 which it has found a message-specific retry record, was not finding
5480 messages that were in split spool directories. Consequently, it was
5481 deleting retry records that should have stayed in existence.
5483 48. Steve fixed some bugs in eximstats.
5485 49. The SPA authentication driver was not abandoning authentication and moving
5486 on to the next authenticator when an expansion was forced to fail,
5487 contradicting the general specification for all authenticators. Instead it
5488 was generating a temporary error. It now behaves as specified.
5490 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5491 (the order specifies the preference for clients). The order is now AES256,
5492 AES128, 3DES, ARCFOUR128.
5494 51. Small patch to Sieve code - explicitly set From: when generating an
5497 52. Exim crashed if a remote delivery caused a very long error message to be
5498 recorded - for instance if somebody sent an entire SpamAssassin report back
5499 as a large number of 550 error lines. This bug was coincidentally fixed by
5500 increasing the size of one of Exim's internal buffers (big_buffer) that
5501 happened as part of the Exiscan merge. However, to be on the safe side, I
5502 have made the code more robust (and fixed the comments that describe what
5505 53. Now that there can be additional text after "Completed" in log lines (if
5506 the queue_time_overall log selector is set), a one-byte patch to exigrep
5507 was needed to allow it to recognize "Completed" as not the last thing in
5510 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5511 patch that reportedly fixes this has been added. I am not expert enough to
5512 create a test for it. This is what the patch creator wrote:
5514 "I found a little strange behaviour of ldap code when working with
5515 Windows 2003 AD Domain, where users was placed in more than one
5516 Organization Units. When I tried to give exim partial DN, the exit code
5517 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5518 But simultaneously result of request was absolutely normal ldap result,
5519 so I produce this patch..."
5521 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5522 REFERENCE, so I have modified the code to exclude the patch when that macro
5525 55. Some experimental protocols are using DNS PTR records for new purposes. The
5526 keys for these records are domain names, not reversed IP addresses. The
5527 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5528 leaves it alone. Component reversal etc. now happens only for IP addresses.
5531 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5533 57. Double the size of the debug message buffer (to 2048) so that more of very
5534 long debug lines gets shown.
5536 58. The exicyclog utility now does better if the number of log files to keep
5537 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5539 59. Two changes related to the smtp_active_hostname option:
5541 (1) $smtp_active_hostname is now available as a variable.
5542 (2) The default for smtp_banner uses $smtp_active_hostname instead
5543 of $primary_hostname.
5545 60. The host_aton() function is supposed to be passed a string that is known
5546 to be a valid IP address. However, in the case of IPv6 addresses, it was
5547 not checking this. This is a hostage to fortune. Exim now panics and dies
5548 if the condition is not met. A case was found where this could be provoked
5549 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5550 components; fortuitously, this particular loophole had already been fixed
5551 by change 4.50/55 above.
5553 If there are any other similar loopholes, the new check in host_aton()
5554 itself should stop them being exploited. The report I received stated that
5555 data on the command line could provoke the exploit when Exim was running as
5556 exim, but did not say which command line option was involved. All I could
5557 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5558 running as the user.
5561 61. There was a buffer overflow vulnerability in the SPA authentication code
5562 (which came originally from the Samba project). I have added a test to the
5563 spa_base64_to_bits() function which I hope fixes it.
5566 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5567 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5569 63. The daemon start-up calls getloadavg() while still root for those OS that
5570 need the first call to be done as root, but it missed one case: when
5571 deliver_queue_load_max is set with deliver_drop_privilege. This is
5572 necessary for the benefit of the queue runner, because there is no re-exec
5573 when deliver_drop_privilege is set.
5575 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5576 This has been fixed.
5578 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5579 was in use, was not putting the data itself into the right store pool;
5580 consequently, it could be overwritten for a subsequent message in the same
5581 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5584 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5586 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5587 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5588 the function were treating the return as a boolean value, which happened to
5589 work because 0=false and not-0=true, but is not correct code.
5591 68. The host_aton() function was not handling scoped IPv6 addresses (those
5592 with, for example, "%eth0" on the end) correctly.
5594 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5595 negated items (that is, ~something) in unsigned ints. Some compilers
5596 apparently mutter when there is no cast.
5598 70. If an address verification called from an ACL failed, and did not produce a
5599 user-specific message (i.e. there was only a "system" message), nothing was
5600 put in $acl_verify_message. In this situation, it now puts the system
5603 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5604 session; change 4.31/43 added the unwanted input to the log line - except
5605 that it did not do this in the start of session case. It now does.
5607 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5608 This is wrong and can cause the other end to generate a synchronization
5609 error if it is another Exim or anything else that does the synchronization
5610 check. A QUIT command is no longer sent after a timeout.
5612 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5613 during host lookups.
5615 74. The defer_ok option of callout verification was not working if it was used
5616 when verifying addresses in header lines, that is, for this case:
5618 verify = header_sender/callout=defer_ok
5620 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5621 those file descriptors could be used for SMTP connections. If anything
5622 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5623 could be sent to the SMTP client, causing chaos. The daemon now opens
5624 stdin, stdout, and stderr to /dev/null when it puts itself into the
5627 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5628 log by default. The user can override this with suitable Perl magic.
5630 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5631 the log message when discard triggers, was not working for the DATA ACL or
5632 for the non-SMTP ACL.
5634 78. Error message wording change in sieve.c.
5636 79. If smtp_accept_max_per_host was set, the number of connections could be
5637 restricted to fewer than expected, because the daemon was trying to set up
5638 a new connection before checking whether the processes handling previous
5639 connections had finished. The check for completed processes is now done
5640 earlier. On busy systems, this bug wouldn't be noticed because something
5641 else would have woken the daemon, and it would have reaped the completed
5644 80. If a message was submitted locally by a user whose login name contained one
5645 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5646 It caused a spool format error. I have fixed the spool reading code. A
5647 related problem was that the "from" clause in the Received: line became
5648 illegal because of the space(s). It is now covered by ${quote_local_part.
5650 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5653 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5655 83. Patch from Sieve maintainer to fix unterminated string problem in
5656 "vacation" handling.
5658 84. Some minor changes to the Linux configuration files to help with other
5659 OS variants using glibc.
5661 85. One more patch for Sieve to update vacation handling to latest spec.
5664 ----------------------------------------------------
5665 See the note above about the 4.44 and 4.50 releases.
5666 ----------------------------------------------------
5672 1. Change 4.43/35 introduced a bug that caused file counts to be
5673 incorrectly computed when quota_filecount was set in an appendfile
5676 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5677 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5680 3. Give more explanation in the error message when the command for a transport
5681 filter fails to execute.
5683 4. There are several places where Exim runs a non-Exim command in a
5684 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5685 was being done only for the command run by the queryprogram router. It is
5686 now done for all such subprocesses. The other cases are: ${run, transport
5687 filters, and the commands run by the lmtp and pipe transports.
5689 5. Some older OS have a limit of 256 on the maximum number of file
5690 descriptors. Exim was using setrlimit() to set 1000 as a large value
5691 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5692 systems. I've change it so that if it can't get 1000, it tries for 256.
5694 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5695 was an oversight, and furthermore, ever since the addition of extra
5696 controls (e.g. 4.43/32), the checks on when to allow different forms of
5697 "control" were broken. There should now be diagnostics for all cases when a
5698 control that does not make sense is encountered.
5700 7. $recipients is now available in the predata ACL (oversight).
5702 8. Tidy the search cache before the fork to do a delivery from a message
5703 received from the command line. Otherwise the child will trigger a lookup
5704 failure and thereby defer the delivery if it tries to use (for example) a
5705 cached ldap connection that the parent has called unbind on.
5707 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5708 of $address_data from the recipient verification was clobbered by the
5709 sender verification.
5711 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5712 was its contents. (It was OK if the option was not defined at all.)
5714 11. A "Completed" log line is now written for messages that are removed from
5715 the spool by the -Mrm option.
5717 12. $host_address is now set to the target address during the checking of
5718 ignore_target_hosts.
5720 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5721 being passed; this would have caused $sender_host_name to have been used if
5722 matching the list had actually called for a host name (not very likely,
5723 since this list is usually IP addresses). A host name is now passed as
5726 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5727 code that specifies a non-restarting handler (typically sigaction() in
5728 modern systems) in an attempt to fix a rare and obscure crash bug.
5730 15. Narrowed the window for a race in the daemon that could cause it to ignore
5731 SIGCHLD signals. This is not a major problem, because they are used only to
5732 wake it up if nothing else does.
5734 16. A malformed maildirsize file could cause Exim to calculate negative values
5735 for the mailbox size or file count. Odd effects could occur as a result.
5736 The maildirsize information is now recalculated if the size or filecount
5739 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5740 support for a long time. Removed HAVE_SYS_VFS_H.
5742 18. Updated exipick to current release from John Jetmore.
5744 19. Allow an empty sender to be matched against a lookup in an address list.
5745 Previously the only cases considered were a regular expression, or an
5748 20. Exim went into a mad DNS lookup loop when doing a callout where the
5749 host was specified on the transport, if the DNS lookup yielded more than
5752 21. The RFC2047 encoding function was originally intended for short strings
5753 such as real names; it was not keeping to the 75-character limit for
5754 encoded words that the RFC imposes. It now respects the limit, and
5755 generates multiple encoded words if necessary. To be on the safe side, I
5756 have increased the buffer size for the ${rfc2047: expansion operator from
5759 22. Failure to deliver a bounce message always caused it to be frozen, even if
5760 there was an errors_to setting on the router. The errors_to setting is now
5763 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5764 canonical form (fully expanded) before being placed in
5765 $sender_host_address.
5767 24. Updated eximstats to version 1.33
5769 25. Include certificate and key file names in error message when GnuTLS fails
5770 to set them up, because the GnuTLS error message doesn't include the name
5771 of the failing file when there is a problem reading it.
5773 26. Expand error message when OpenSSL has problems setting up cert/key files.
5776 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5777 (this can affect the format of dates).
5779 28. exim_tidydb, when checking for the continued existence of a message for
5780 which it has found a message-specific retry record, was not finding
5781 messages that were in split spool directories. Consequently, it was
5782 deleting retry records that should have stayed in existence.
5784 29. eximstats updated to version 1.35
5785 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5786 1.35 - bugfix such that pie charts by volume are generated correctly
5788 30. The SPA authentication driver was not abandoning authentication and moving
5789 on to the next authenticator when an expansion was forced to fail,
5790 contradicting the general specification for all authenticators. Instead it
5791 was generating a temporary error. It now behaves as specified.
5793 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5794 (the order specifies the preference for clients). The order is now AES256,
5795 AES128, 3DES, ARCFOUR128.
5797 31. Small patch to Sieve code - explicitly set From: when generating an
5800 32. Exim crashed if a remote delivery caused a very long error message to be
5801 recorded - for instance if somebody sent an entire SpamAssassin report back
5802 as a large number of 550 error lines. This bug was coincidentally fixed by
5803 increasing the size of one of Exim's internal buffers (big_buffer) that
5804 happened as part of the Exiscan merge. However, to be on the safe side, I
5805 have made the code more robust (and fixed the comments that describe what
5808 33. Some experimental protocols are using DNS PTR records for new purposes. The
5809 keys for these records are domain names, not reversed IP addresses. The
5810 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5811 leaves it alone. Component reversal etc. now happens only for IP addresses.
5814 34. The host_aton() function is supposed to be passed a string that is known
5815 to be a valid IP address. However, in the case of IPv6 addresses, it was
5816 not checking this. This is a hostage to fortune. Exim now panics and dies
5817 if the condition is not met. A case was found where this could be provoked
5818 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5819 components; fortuitously, this particular loophole had already been fixed
5820 by change 4.50/55 or 4.44/33 above.
5822 If there are any other similar loopholes, the new check in host_aton()
5823 itself should stop them being exploited. The report I received stated that
5824 data on the command line could provoke the exploit when Exim was running as
5825 exim, but did not say which command line option was involved. All I could
5826 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5827 running as the user.
5830 35. There was a buffer overflow vulnerability in the SPA authentication code
5831 (which came originally from the Samba project). I have added a test to the
5832 spa_base64_to_bits() function which I hope fixes it.
5835 36. The daemon start-up calls getloadavg() while still root for those OS that
5836 need the first call to be done as root, but it missed one case: when
5837 deliver_queue_load_max is set with deliver_drop_privilege. This is
5838 necessary for the benefit of the queue runner, because there is no re-exec
5839 when deliver_drop_privilege is set.
5841 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5842 was in use, was not putting the data itself into the right store pool;
5843 consequently, it could be overwritten for a subsequent message in the same
5844 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5847 38. Sometimes the final signoff response after QUIT could fail to get
5848 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5849 < 0 before doing a fflush(). This bug looks as though it goes back to the
5850 introduction of TLS in release 3.20, but "sometimes" must have been rare
5851 because the tests only now provoked it.
5857 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5858 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5859 Now it returns an integer. A number of calls were still expecting a T/F
5860 return. Fortuitously, in all cases, the tests worked in OK situations,
5861 which is the norm. However, things would have gone wrong on any write
5862 failures on the smtp file descriptor. This function is used when sending
5863 messages over SMTP and also when doing verify callouts.
5865 2. When Exim is called to do synchronous delivery of a locally submitted
5866 message (the -odf or -odi options), it no longer closes stderr before doing
5869 3. Implemented the mua_wrapper option.
5871 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5873 5. Implemented the functions header_remove(), header_testname(),
5874 header_add_at_position(), and receive_remove_recipient(), and exported them
5877 6. If an ACL "warn" statement specified the addition of headers, Exim already
5878 inserted X-ACL-Warn: at the start if there was no header name. However, it
5879 was not making this test for the second and subsequent header lines if
5880 there were newlines in the string. This meant that an invalid header could
5881 be inserted if Exim was badly configured.
5883 7. Allow an ACL "warn" statement to add header lines at the start or after all
5884 the Received: headers, as well as at the end.
5886 8. Added the rcpt_4xx retry error code.
5888 9. Added postmaster_mailfrom=xxx to callout verification option.
5890 10. Added mailfrom=xxxx to the callout verification option, for verify=
5893 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5894 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5896 12. Inserted some casts to stop certain compilers warning when using pointer
5897 differences as field lengths or precisions in printf-type calls (mostly
5898 affecting debugging statements).
5900 13. Added optional readline() support for -be (dynamically loaded).
5902 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5903 same clock tick as a message's arrival, so that its received time was the
5904 same as the "first fail" time on the retry record, and that message
5905 remained on the queue past the ultimate address timeout, every queue runner
5906 would try a delivery (because it was past the ultimate address timeout) but
5907 after another failure, the ultimate address timeout, which should have then
5908 bounced the address, did not kick in. This was a "< instead of <=" error;
5909 in most cases the first failure would have been in the next clock tick
5910 after the received time, and all would be well.
5912 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5913 being recognized when the domain list was tested by the match_domain
5914 condition in an expansion string.
5916 16. Added the ${str2b64: operator.
5918 17. Exim was always calling setrlimit() to set a large limit for the number of
5919 processes, without checking whether the existing limit was already
5920 adequate. (It did check for the limit on file descriptors.) Furthermore,
5921 errors from getrlimit() and setrlimit() were being ignored. Now they are
5922 logged to the main and panic logs, but Exim does carry on, to try to do its
5923 job under whatever limits there are.
5925 18. Imported PCRE 5.0.
5927 19. Trivial typo in log message " temporarily refused connection" (the leading
5930 20. If the log selector return_path_on_delivery was set and an address was
5931 redirected to /dev/null, the delivery process crashed because it assumed
5932 that a return path would always be set for a "successful" delivery. In this
5933 case, the whole delivery is bypassed as an optimization, and therefore no
5936 21. Internal re-arrangement: the function for sending a challenge and reading
5937 a response while authentication was assuming a zero-terminated challenge
5938 string. It's now changed to take a pointer and a length, to allow for
5939 binary data in such strings.
5941 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5943 23. Exim was not respecting finduser_retries when seeking the login of the
5944 uid under which it was called; it was always trying 10 times. (The default
5945 setting of finduser_retries is zero.) Also, it was sleeping after the final
5946 failure, which is pointless.
5948 24. Implemented tls_on_connect_ports.
5950 25. Implemented acl_smtp_predata.
5952 26. If the domain in control=submission is set empty, Exim assumes that the
5953 authenticated id is a complete email address when it generates From: or
5954 Sender: header lines.
5956 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5957 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5958 chown and chgrp in /bin and hostname in /usr/bin.
5960 28. Exim was keeping the "process log" file open after each use, just as it
5961 does for the main log. This opens the possibility of it remaining open for
5962 long periods when the USR1 signal hits a daemon. Occasional processlog
5963 errors were reported, that could have been caused by this. Anyway, it seems
5964 much more sensible not to leave this file open at all, so that is what now
5967 29. The long-running daemon process does not normally write to the log once it
5968 has entered its main loop, and it closes the log before doing so. This is
5969 so that log files can straightforwardly be renamed and moved. However,
5970 there are a couple of unusual error situations where the daemon does write
5971 log entries, and I had neglected to close the log afterwards.
5973 30. The text of an SMTP error response that was received during a remote
5974 delivery was being truncated at 512 bytes. This is too short for some of
5975 the long messages that one sometimes sees. I've increased the limit to
5978 31. It is now possible to make retry rules that apply only when a message has a
5979 specific sender, in particular, an empty sender.
5981 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5982 it possible to be selective about when SMTP synchronization is enforced.
5984 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5986 32. Implemented hosts_connection_nolog.
5988 33. Added an ACL for QUIT.
5990 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5993 35. Added mailbox_size and mailbox_filecount to appendfile.
5995 36. Added control = no_multiline_responses to ACLs.
5997 37. There was a bug in the logic of the code that waits for the clock to tick
5998 in the case where the clock went backwards by a substantial amount such
5999 that the microsecond fraction of "now" was more than the microsecond
6000 fraction of "then" (but the whole seconds number was less).
6002 38. Added support for the libradius Radius client library this is found on
6003 FreeBSD (previously only the radiusclient library was supported).
6009 1. When certain lookups returned multiple values in the form name=value, the
6010 quoting of the values was not always being done properly. Specifically:
6011 (a) If the value started with a double quote, but contained no whitespace,
6013 (b) If the value contained whitespace other than a space character (i.e.
6014 tabs or newlines or carriage returns) it was not quoted.
6015 This fix has been applied to the mysql and pgsql lookups by writing a
6016 separate quoting function and calling it from the lookup code. The fix
6017 should probably also be applied to nisplus, ibase and oracle lookups, but
6018 since I cannot test any of those, I have not disturbed their existing code.
6020 2. A hit in the callout cache for a specific address caused a log line with no
6021 reason for rejecting RCPT. Now it says "Previous (cached) callout
6022 verification failure".
6024 3. There was an off-by-one bug in the queryprogram router. An over-long
6025 return line was truncated at 256 instead of 255 characters, thereby
6026 overflowing its buffer with the terminating zero. As well as fixing this, I
6027 have increased the buffer size to 1024 (and made a note to document this).
6029 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6030 when Exim is waiting for an SMTP response from a remote server, Exim
6031 restarts its select() call on the socket, thereby resetting its timeout.
6032 This is not a problem when such interrupts are rare. Somebody set up a cron
6033 job to run exiwhat every 2 minutes, which is less than the normal select()
6034 timeout (5 or 10 minutes). This meant that the select() timeout never
6035 kicked in because it was always reset. I have fixed this by comparing the
6036 time when an interrupt arrives with the time at the start of the first call
6037 to select(). If more time than the timeout has elapsed, the interrupt is
6038 treated as a timeout.
6040 5. Some internal re-factoring in preparation for the addition of Sieve
6041 extensions (by MH). In particular, the "personal" test is moved to a
6042 separate function, and given an option for scanning Cc: and Bcc: (which is
6043 not set for Exim filters).
6045 6. When Exim created an email address using the login of the caller as the
6046 local part (e.g. when creating a From: or Sender: header line), it was not
6047 quoting the local part when it contained special characters such as @.
6049 7. Installed new OpenBSD configuration files.
6051 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6052 try to make them clearer.
6054 9. Callout options, other than the timeout value, were being ignored when
6055 verifying sender addresses in header lines. For example, when using
6057 verify = header_sender/callout=no_cache
6059 the cache was (incorrectly) being used.
6061 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6062 only the Cygwin environment.
6064 11. When return_path_on_delivery was set as a log selector, if different remote
6065 addresses in the same message used different return paths and parallel
6066 remote delivery occurred, the wrong values would sometimes be logged.
6067 (Whenever a remote delivery process finished, the return path value from
6068 the most recently started remote delivery process was logged.)
6070 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6071 lines when AUTH and/or TLS are in use. This is the "received protocol"
6072 field. Exim used to use "asmtp" for authenticated SMTP, without any
6073 indication (in the protocol name) for TLS use. Now it follows the RFC and
6074 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6075 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6076 names appear in log lines as well as in Received: header lines.
6078 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6079 extensions, and comparison tests, and to fix some bugs.
6081 14. Changes to the "personal" filter test:
6083 (1) The test was buggy in that it was just doing the equivalent of
6084 "contains" tests on header lines. For example, if a user's address was
6085 anne@some.where, the "personal" test would incorrectly be true for
6087 To: susanne@some.where
6089 This test is now done by extracting each address from the header in turn,
6090 and checking the entire address. Other tests that are part of "personal"
6091 are now done using regular expressions (for example, to check local parts
6092 of addresses in From: header lines).
6094 (2) The list of non-personal local parts in From: addresses has been
6095 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6096 taken from the Sieve specification recommendations.
6098 (3) If the message contains any header line starting with "List-" it is
6099 treated as non-personal.
6101 (4) The test for "circular" in the Subject: header line has been removed
6102 because it now seems ill-conceived.
6104 15. Minor typos in src/EDITME comments corrected.
6106 16. Installed latest exipick from John Jetmore.
6108 17. If headers_add on a router specified a text string that was too long for
6109 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6110 of string_sprintf() is now avoided.
6112 18. $message_body_size was not set (it was always zero) when running the DATA
6113 ACL and the local_scan() function.
6115 19. For the "mail" command in an Exim filter, no default was being set for
6116 the once_repeat time, causing a random time value to be used if "once" was
6117 specified. (If the value happened to be <= 0, no repeat happened.) The
6118 default is now 0s, meaning "never repeat". The "vacation" command was OK
6119 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6120 (I found it when inspecting the code).
6122 20. There is now an overall timeout for performing a callout verification. It
6123 defaults to 4 times the callout timeout, which applies to individual SMTP
6124 commands during the callout. The overall timeout applies when there is more
6125 than one host that can be tried. The timeout is checked before trying the
6126 next host. This prevents very long delays if there are a large number of
6127 hosts and all are timing out (e.g. when the network connections are timing
6128 out). The value of the overall timeout can be changed by specifying an
6129 additional sub-option for "callout", called "maxwait". For example:
6131 verify = sender/callout=5s,maxwait=20s
6133 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6134 to the end before writing, but this should make it even safer).
6136 22. Exim was forgetting that it had advertised PIPELINING for the second and
6137 subsequent messages on an SMTP connection. It was also not resetting its
6138 memory on STARTTLS and an internal HELO.
6140 23. When Exim logs an SMTP synchronization error within a session, it now
6141 records whether PIPELINING has been advertised or not.
6143 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6144 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6145 rather than long int.
6147 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6149 26. Added the never_mail option to autoreply.
6155 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6156 crash if the getsockname() call failed; this can happen if a connection is
6157 closed very soon after it is established. The problem was simply in the
6158 order in which certain operations were done, causing Exim to try to write
6159 to the SMTP stream before it had set up the file descriptor. The bug has
6160 been fixed by making things happen in the correct order.
6166 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6167 before the connection was closed, thus losing the rejection response.
6169 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6170 some early Solaris releases, but causes trouble in current releases where
6171 socklen_t is defined.
6173 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6176 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6179 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6180 that releasing the top of it at the end releases what was used for sub-
6181 expansions (unless the block got too big). However, discard this block if
6182 the first thing is a variable or header, so that we can use its block when
6183 it is dynamic (useful for very large $message_headers, for example).
6185 6. Lookups now cache *every* query, not just the most recent. A new, separate
6186 store pool is used for this. It can be recovered when all lookup caches are
6187 flushed. Lookups now release memory at the end of their result strings.
6188 This has involved some general refactoring of the lookup sources.
6190 7. Some code has been added to the store_xxx() functions to reduce the amount
6191 of flapping under certain conditions.
6193 8. log_incoming_interface used to affect only the <= reception log lines. Now
6194 it causes the local interface and port to be added to several more SMTP log
6195 lines, for example "SMTP connection from", and rejection lines.
6197 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6199 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6201 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6202 could be overwritten at the end of the current message (or the start of a
6203 new message if it was set in a HELO ACL). The value is now preserved for
6204 the duration of the SMTP connection.
6206 12. If a transport had a headers_rewrite setting, and a matching header line
6207 contained an unqualified address, that address was qualified, even if it
6208 did not match any rewriting rules. The underlying bug was that the values
6209 of the flags that permit the existence of unqualified sender and recipient
6210 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6211 non-local messages, and by -bnq for local messages) were not being
6212 preserved with the message after it was received.
6214 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6215 "next input=" as part of the text comprising the host identity instead of
6216 the correct text. The code was using the same buffer for two different
6217 strings. However, depending on which order the printing function evaluated
6218 its arguments, the bug did not always show up. Under Linux, for example, my
6219 test suite worked just fine.
6221 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6222 doesn't work with some older versions of Perl. It has been changed to "my",
6223 which in any case is probably the better facility to use.
6225 15. A really picky compiler found some instances of statements for creating
6226 error messages that either had too many or two few arguments for the format
6229 16. The size of the buffer for calls to the DNS resolver has been increased
6230 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6231 for addresses that have a lot of PTR records. This alleviates a problem; it
6232 does not fully solve it.
6234 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6235 buffer now truncates the list and logs the incident, which is the same
6236 action as happens when Exim is looking up a host name and its aliases.
6237 Previously in this situation something unpredictable would happen;
6238 sometimes it was "internal error: store_reset failed".
6240 18. If a server dropped the connection unexpectedly when an Exim client was
6241 using GnuTLS and trying to read a response, the client delivery process
6242 crashed while trying to generate an error log message.
6244 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6245 string, for example:
6247 warn message = H1: something\nH2: something
6249 the text was added as a single header line from Exim's point of view
6250 though it ended up OK in the delivered message. However, searching for the
6251 second and subsequent header lines using $h_h2: did not work. This has been
6252 fixed. Similarly, if a system filter added multiple headers in this way,
6253 the routers could not see them.
6255 20. Expanded the error message when iplsearch is called with an invalid key to
6256 suggest using net-iplsearch in a host list.
6258 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6259 ACLs are no longer actually imposed (and a message to that effect is
6262 22. If a "gecos" field in a passwd entry contained escaped characters, in
6263 particular, if it contained a \" sequence, Exim got it wrong when building
6264 a From: or a Sender: header from that name. A second bug also caused
6265 incorrect handling when an unquoted " was present following a character
6266 that needed quoting.
6268 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6269 was not being matched caselessly.
6271 24. Arranged for all hyphens in the exim.8 source to be escaped with
6274 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6275 properly. Recipient callout cache records were still being keyed to include
6276 the sender, even when use_sender was set false. This led to far more
6277 callouts that were necessary. The sender is no longer included in the key
6278 when use_sender is false.
6280 26. Added "control = submission" modifier to ACLs.
6282 27. Added the ${base62d: operator to decode base 62 numbers.
6284 28. dnsdb lookups can now access SRV records.
6286 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6287 the configuration file.
6289 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6290 (-v) mode. This makes the output for a verbose queue run more intelligible.
6292 31. Added a use_postmaster feature to recipient callouts.
6294 32. Added the $body_zerocount variable, containing the number of binary zero
6295 bytes in the message body.
6297 33. The time of last modification of the "new" subdirectory is now used as the
6298 "mailbox time last read" when there is a quota error for a maildir
6301 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6303 35. Added +ignore_unknown as a special item in host lists.
6305 36. Code for decoding IPv6 addresses in host lists is now included, even if
6306 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6307 address was recognized as an IP address, but was then not correctly decoded
6308 into binary, causing unexpected and incorrect effects when compared with
6315 1. Very minor rewording of debugging text in manualroute to say "list of
6316 hosts" instead of "hostlist".
6318 2. If verify=header_syntax was set, and a header line with an unqualified
6319 address (no domain) and a large number of spaces between the end of the
6320 name and the colon was received, the reception process suffered a buffer
6321 overflow, and (when I tested it) crashed. This was caused by some obsolete
6322 code that should have been removed. The fix is to remove it!
6324 3. When running in the test harness, delay a bit after writing a bounce
6325 message to get a bit more predictability in the log output.
6327 4. Added a call to search_tidyup() just before forking a reception process. In
6328 theory, someone could use a lookup in the expansion of smtp_accept_max_
6329 per_host which, without the tidyup, could leave open a database connection.
6331 5. Added the variables $recipient_data and $sender_data which get set from a
6332 lookup success in an ACL "recipients" or "senders" condition, or a router
6333 "senders" option, similar to $domain_data and $local_part_data.
6335 6. Moved the writing of debug_print from before to after the "senders" test
6338 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6339 problems for message scanning, either using a data ACL, or using
6340 local_scan() because the Received: header was not generated till after they
6341 were called (in order to set the time as the time of reception completion).
6342 I have revised the way this works. The header is now generated after the
6343 body is received, but before the ACL or local_scan() are called. After they
6344 are run, the timestamp in the header is updated.
6350 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6351 before starting a queue runner without re-exec. This happened only when
6352 deliver_drop_privilege was set or when the Exim user was set to root. The
6353 effect of the bug was that timeouts during subsequent deliveries caused
6354 crashes instead of being properly handled. The handler is now left at its
6355 default (and expected) setting.
6357 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6358 message, again when deliver_drop_privilege is set or Exim is run as root.
6359 The bug described in (1) was not present in this case, but the tidying up
6360 of the other signals was missing. I have made the two cases consistent.
6362 3. The ignore_target_hosts setting on a manualroute router was being ignored
6363 for hosts that were looked up using the /MX notation.
6365 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6368 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6369 operated on the sender address. After changing the $sender_address to <>
6370 for the sender address verify, Exim was re-instated it as the original
6371 (before rewriting) address, but remembering that it had rewritten it, so it
6372 wasn't rewriting it again. This bug also had the effect of breaking the
6373 sender address verification caching when the sender address was rewritten.
6375 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6376 This has been changed so that if the ip literal address matches
6377 ignore_target_hosts, the router declines.
6379 7. Added expansion conditions match_domain, match_address, and match_local_
6380 part (NOT match_host).
6382 8. The placeholder for the Received: header didn't have a length field set.
6384 9. Added code to Exim itself and to exim_lock to test for a specific race
6385 condition that could lead to file corruption when using MBX delivery. The
6386 issue is with the lockfile that is created in /tmp. If this file is removed
6387 after a process has opened it but before that process has acquired a lock,
6388 there is the potential for a second process to recreate the file and also
6389 acquire a lock. This could lead to two Exim processes writing to the file
6390 at the same time. The added code performs the same test as UW imapd; it
6391 checks after acquiring the lock that its file descriptor still refers to
6392 the same named file.
6394 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6395 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6398 11. Added the smtp_active_hostname option. If used, this will typically be made
6399 to depend on the incoming interface address. Because $interface_address is
6400 not set up until the daemon has forked a reception process, error responses
6401 that can happen earlier (such as "too many connections") no longer contain
6404 12. If an expansion in a condition on a "warn" statement fails because a lookup
6405 defers, the "warn" statement is abandoned, and the next ACL statement is
6406 processed. Previously this caused the whole ACL to be aborted.
6408 13. Added the iplsearch lookup type.
6410 14. Added ident_timeout as a log selector.
6412 15. Added tls_certificate_verified as a log selector.
6414 16. Added a global option tls_require_ciphers (compare the smtp transport
6415 option of the same name). This controls incoming TLS connections.
6417 17. I finally figured out how to make tls_require_ciphers do a similar thing
6418 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6419 before starting the TLS session.
6421 18. Tabs are now shown as \t in -bP output.
6423 19. If the log selector return_path_on_delivery was set, Exim crashed when
6424 bouncing a message because it had too many Received: header lines.
6426 20. If two routers both had headers_remove settings, and the first one included
6427 a superfluous trailing colon, the final name in the first list and the
6428 first name in the second list were incorrectly joined into one item (with a
6429 colon in the middle).
6435 1. Added -C and -D options to the exinext utility, mainly to make it easier
6436 to include in the automated testing, but these could be helpful when
6437 multiple configurations are in use.
6439 2. The exinext utility was not formatting the output nicely when there was
6440 an alternate port involved in the retry record key, nor when there was a
6441 message id as well (for retries that were specific to a specific message
6442 and a specific host). It was also confused by IPv6 addresses, because of
6443 the additional colons they contain. I have fixed the IPv4 problem, and
6444 patched it up to do a reasonable job for IPv6.
6446 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6447 delivery, the log line now contains "pipelined" if PIPELINING was used.
6449 4. An SMTP transport process used to panic and die if the bind() call to set
6450 an explicit outgoing interface failed. This has been changed; it is now
6451 treated in the same way as a connect() failure.
6453 5. A reference to $sender_host_name in the part of a conditional expansion
6454 that was being skipped was still causing a DNS lookup. This no longer
6457 6. The def: expansion condition was not recognizing references to header lines
6458 that used bh_ and bheader_.
6460 7. Added the _cache feature to named lists.
6462 8. The code for checking quota_filecount in the appendfile transport was
6463 allowing one more file than it should have been.
6465 9. For compatibility with Sendmail, the command line option
6473 and sets the incoming protocol and host name (for trusted callers). The
6474 host name and its colon can be omitted when only the protocol is to be set.
6475 Note the Exim already has two private options, -pd and -ps, that refer to
6476 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6477 "s", but I don't think that's a major issue.
6479 10. A number of refactoring changes to the code, none of which should affect
6482 (a) The number of logging options was getting close to filling up the
6483 32-bit word that was used as a bit map. I have split them into two classes:
6484 those that are passed in the argument to log_write(), and those that are
6485 only ever tested independently outside of that function. These are now in
6486 separate 32-bit words, so there is plenty of room for expansion again.
6487 There is no change in the user interface or the logging behaviour.
6489 (b) When building, for example, log lines, the code previously used a
6490 macro that called string_cat() twice, in order to add two strings. This is
6491 not really sufficiently general. Furthermore, there was one instance where
6492 it was actually wrong because one of the argument was used twice, and in
6493 one call a function was used. (As it happened, calling the function twice
6494 did not affect the overall behaviour.) The macro has been replaced by a
6495 function that can join an arbitrary number of extra strings onto a growing
6498 (c) The code for expansion conditions now uses a table and a binary chop
6499 instead of a serial search (which was left over from when there were very
6500 few conditions). Also, it now recognizes conditions like "pam" even when
6501 the relevant support is not compiled in: a suitably worded error message is
6502 given if an attempt is made to use such a condition.
6504 11. Added ${time_interval:xxxxx}.
6506 12. A bug was causing one of the ddress fields not to be passed back correctly
6507 from remote delivery subprocesses. The field in question was not being
6508 subsequently used, so this caused to problems in practice.
6510 13. Added new log selectors queue_time and deliver_time.
6512 14. Might have fixed a bug in maildirsizefile handling that threw up
6513 "unexpected character" debug warnings, and recalculated the data
6514 unnecessarily. In any case, I expanded the warning message to give more
6517 15. Added the message "Restricted characters in address" to the statements in
6518 the default ACL that block characters like @ and % in local parts.
6520 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6521 Three changes have been made:
6523 (a) There was a serious bug; a negative response to MAIL caused the whole
6524 recipient domain to be cached as invalid, thereby blocking all messages
6525 to all local parts at the same domain, from all senders. This bug has
6526 been fixed. The domain is no longer cached after a negative response to
6527 MAIL if the sender used is not empty.
6529 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6532 (c) A new callout option, "use_sender" has been added for people who want
6533 the modified behaviour.
6539 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6542 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6543 indeed breaks things for older releases.
6545 3. Added additional logging to the case where there is a problem reading data
6546 from a filter that is running in a subprocess using a pipe, in order to
6547 try to track down a specific problem.
6549 4. Testing facility fudge: when running in the test harness and attempting
6550 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6551 getting "No route to host". Convert this to a timeout.
6553 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6556 6. Some OS don't have socklen_t but use size_t instead. This affects the
6557 fifth argument of getsockopt() amongst other things. This is now
6558 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6559 can be set for individual OS. I have set it for SunOS5, OSF1, and
6560 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6561 some earlier ones do not.
6563 7. Change 4.30/15 was not doing the test caselessly.
6565 8. The standard form for an IPv6 address literal was being rejected by address
6566 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6567 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6568 this, as well as the form without the "IPv6" on the front (but only when
6569 address literals are enabled, of course).
6571 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6573 10. Exim crashed if a message with an empty sender address specified by -f
6574 encountered a router with an errors_to setting. This could be provoked only
6575 by a command such as
6579 where an empty string was supplied; "<>" did not hit this bug.
6581 11. Installed PCRE release 4.5.
6583 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6584 remained set. It is now erased.
6586 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6587 times from message ids (which are base 36 rather than the normal 62).
6589 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6590 were being counted as actual protocol errors, and logged if the log
6591 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6592 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6593 and DATA following a set of rejected RCPTs do not count as protocol errors.
6594 In other words, Exim assumes they were pipelined, though this may not
6595 actually be the case. Of course, in all cases the client gets an
6596 appropriate error code.
6598 15. If a lookup fails in an ACL condition, a message about the failure may
6599 be available; it is used if testing the ACL cannot continue, because most
6600 such messages specify what the cause of the deferral is. However, some
6601 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6602 that caused an old message to be retained and used if a later statement
6603 caused a defer, replacing the real cause of the deferral.
6605 16. If an IP address had so many PTR records that the DNS lookup buffer
6606 was not large enough to hold them, Exim could crash while trying to process
6607 the truncated data. It now detects and logs this case.
6609 17. Further to 4.21/58, another change has been made: if (and only if) the
6610 first line of a message (the first header line) ends with CRLF, a bare LF
6611 in a subsequent header line has a space inserted after it, so as not to
6612 terminate the header.
6614 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6615 unnecessarily, used atoi() instead of strtol(), and didn't check the
6616 termination when getting file sizes from file names by regex.
6618 19. Completely re-implemented the support for maildirsize files, in the light
6619 of a number of problems with the previous contributed implementation
6620 (4.30/29). In particular:
6622 . If the quota is zero, the maildirsize file is maintained, but no quota is
6625 . If the maildir directory does not exist, it is created before any attempt
6626 to write a maildirsize file.
6628 . The quota value in the file is just a cache; if the quota is changed in
6629 the transport, the new value overrides.
6631 . A regular expression is available for excluding directories from the
6634 20. The autoreply transport checks the characters in options that define the
6635 message's headers; it allows continued headers, but it was checking with
6636 isspace() after an embedded newline instead of explicitly looking for a
6639 21. If all the "regular" hosts to which an address was routed had passed their
6640 expiry times, and had not reached their retry times, the address was
6641 bounced, even if fallback hosts were defined. Now Exim should go on to try
6644 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6645 equivalent code in the SMTP transport. Some hosts send humungous responses
6646 to HELO/EHLO, more than 1024 it seems.
6648 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6649 gives compiler warnings in some environments. I've now done it "properly",
6652 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6653 (because of problems with the built-in one) was declared to return uschar *
6654 instead of char *, causing compiler failure.
6656 25. Fixed a file descriptor leak when processing alias/forward files.
6658 26. Fixed a minor format string issue in dbfn.c.
6660 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6662 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6663 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6666 29. When a sender address is verified, it is cached, to save repeating the test
6667 when there is more than one recipient in a message. However, when the
6668 verification involves a callout, it is possible for different callout
6669 options to be set for different recipients. It is too complicated to keep
6670 track of this in the cache, so now Exim always runs a verification when a
6671 callout is required, relying on the callout cache for the optimization.
6672 The overhead is duplication of the address routing, but this should not be
6675 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6676 to be verified with callout=postmaster, and the main callout worked but the
6677 postmaster check failed, the verification correctly failed. However, if a
6678 subsequent RCPT command asked for sender verification *without* the
6679 postmaster check, incorrect caching caused this verification also to fail,
6682 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6683 it was not caching the DNS options (qualify_single, search_parents) that
6684 were used when the lookup failed. A subsequent lookup with different
6685 options therefore always gave the same answer, though there were cases
6686 where it should not have. (Example: a "domains = !$mx_any" option on a
6687 dnslookup router: the "domains" option is always processed without any
6688 widening, but the router might have qualify_single set.) Now Exim uses the
6689 cached value only when the same options are set.
6691 32. Added John Jetmore's "exipick" utility to the distribution.
6693 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6694 than a timeout (e.g. a certificate is required, and is not provided), an
6695 Exim server now closes the connection immediately. Previously it waited for
6696 the client to close - but if the client is SSL, it seems that they each
6697 wait for each other, leading to a delay before one of them times out.
6699 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6700 maintained 0.8.x compatibility because I don't think many are using it, and
6701 it is clearly obsolete.
6703 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6706 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6707 client certificate was expired. A simple patch fixes this, though I don't
6708 understand the full logic of why the verify callback is called multiple
6711 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6712 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6713 which causes problems with some clients (such as the Certicom SSL Plus
6714 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6715 disables the coutermeasure allowing Eudora to connect."
6717 38. Exim was not checking that a write() to a log file succeeded. This could
6718 lead to Bad Things if a log got too big, in particular if it hit a file
6719 size limit. Exim now panics and dies if it cannot write to a log file, just
6720 as it does if it cannot open a log file.
6722 39. Modified OS/Makefile-Linux so that it now contains
6724 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6726 The two -D definitions ensure that Exim is compiled with large file
6727 support, which makes it possible to handle log files that are bigger than
6730 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6731 instance) a domain was checked against a named list that involved a lookup,
6732 causing $domain_data to be set, then another domain was checked against the
6733 same list, then the first domain was re-checked, the value of $domain_data
6734 after the final check could be wrong. In particular, if the second check
6735 failed, it could be set empty. This bug probably also applied to
6738 41. The strip_trailing_dot option was not being applied to the address given
6739 with the -f command-line option.
6741 42. The code for reading a message's header from the spool was incrementing
6742 $received_count, but never initializing it. This meant that the value was
6743 incorrect (doubled) while delivering a message in the same process in which
6744 it was received. In the most common configuration of Exim, this never
6745 happens - a fresh exec is done - but it can happen when
6746 deliver_drop_privilege is set.
6748 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6749 it now includes up to 150 characters of the unexpected data in the log
6752 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6753 and building data strings. The size of both of these buffers was 10 000
6754 bytes - far larger than anybody would *ever* want, thought I. Needless to
6755 say, somebody hit the limit. I have increased the maximum line length to
6756 20 000 and the maximum data length of concatenated lines to 100 000. I have
6757 also fixed two bugs, because there was no checking on these buffers. Tsk,
6758 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6759 buffer is too small.
6761 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6762 lsearch lookups. Now it does.
6764 46. When parsing a route_list item in a manualroute router, a fixed-length
6765 buffer was used for the list of hosts. I made this 1024 bytes long,
6766 thinking that nobody would ever have a list of hosts that long. Wrong.
6767 Somebody had a whole pile of complicated expansion conditions, and the
6768 string was silently truncated, leading to an expansion error. It turns out
6769 that it is easier to change to an unlimited length (owing to other changes
6770 that have happened since this code was originally written) than to build
6771 structure for giving a limitation error. The length of the item that
6772 expands into the list of hosts is now unlimited.
6774 47. The lsearch lookup could not handle data where the length of text line was
6775 more than 4095 characters. Such lines were truncated, leading to shortened
6776 data being returned. It should now handle lines of any length.
6778 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6779 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6782 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6783 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6784 no longer happens in comment lines. A list of replacements is now placed
6785 at the head of all of the source files, except those whose only change is
6786 to replace PERL_COMMAND in the very first #! line.
6788 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6789 messages on the queue, with a bottom-up merge sort, using code contributed
6790 by Michael Haardt. This should make operations like -bp somewhat faster on
6791 large queues. It won't affect queue runners, except when queue_run_in_order
6794 51. Installed eximstats 1.31 in the distribution.
6796 52. Added support for SRV lookups to the dnslookup router.
6798 53. If an ACL referred to $message_body or $message_body_end, the value was not
6799 reset for any messages that followed in the same SMTP session.
6801 54. The store-handling optimization for building very long strings was not
6802 differentiating between the different store pools. I don't think this
6803 actually made any difference in practice, but I've tidied it.
6805 55. While running the routers to verify a sender address, $sender_address
6806 was still set to the sender address. This is wrong, because when routing to
6807 send a bounce to the sender, it would be empty. Therefore, I have changed
6808 it so that, while verifying a sender address, $sender_address is set to <>.
6809 (There is no change to what happens when verifying a recipient address.)
6811 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6812 target A or AAAA records (if not already returned) without resetting the
6813 qualify_single or search_parents options of the DNS resolver. These are
6814 inappropriate in this case because the targets of MX and SRV records must
6815 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6816 target that, when qualified, matched something in the local domain. These
6817 two options are now turned off when doing these lookups.
6819 57. It seems that at least some releases of Reiserfs (which does not have the
6820 concept of a fixed number of inodes) returns zero and not -1 for the
6821 number of available inodes. This interacted badly with check_spool_inodes,
6822 which assumed that -1 was the "no such thing" setting. What I have done is
6823 to check that the total number of inodes is greater than zero before doing
6824 the test of how many are available.
6826 58. When a "warn" ACL statement has a log_message modifier, the message is
6827 remembered, and not repeated. This is to avoid a lot of repetition when a
6828 message has many recipients that cause the same warning to be written.
6829 However, Exim was preserving the list of already written lines for an
6830 entire SMTP session, which doesn't seem right. The memory is now reset if a
6831 new message is started.
6833 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6834 debugging output unless log_rewrite was also set.
6836 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6837 of (int)(handle) when we know that handle contains (void *)(-1).
6839 61. The Exim daemon panic-logs an error return when it closes the incoming
6840 connection. However "connection reset by peer" seems to be common, and
6841 isn't really an error worthy of noting specially, so that particular error
6844 62. When Exim is trying to find all the local interfaces, it used to panic and
6845 die if the ioctl to get the interface flags failed. However, it seems that
6846 on at least one OS (Solaris 9) it is possible to have an interface that is
6847 included in the list of interfaces, but for which you get a failure error
6848 for this call. This happens when the interface is not "plumbed" into a
6849 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6850 failure of the "get flags" call assumes that the interface is down.
6852 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6853 makes life easier for people who are doing arithmetic on fields extracted
6854 from dates, where you often get leading zeros that should not be
6855 interpreted as octal.
6857 64. Added qualify_domain to the redirect router, to override the global
6860 65. If a pathologically long header line contained very many addresses (the
6861 report of this problem mentioned 10 000) and each of them was rewritten,
6862 Exim could use up a very large amount of memory. (It kept on making new
6863 copies of the header line as it rewrote, and never released the old ones.)
6864 At the expense of a bit more processing, the header rewriting function has
6865 been changed so that it no longer eats memory in this way.
6867 66. The generation of the Received: header has been moved from the time that a
6868 message starts to be received, to the time that it finishes. The timestamp
6869 in the Received: header should now be very close to that of the <= log
6870 line. There are two side-effects of this change:
6872 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6873 logged header lines no longer include the local Received: line, because
6874 it has not yet been created. The same applies to a copy of the message
6875 that is returned to a non-SMTP sender when a message is rejected.
6877 (b) When a filter file is tested using -bf, no additional Received: header
6878 is added to the test message. After some thought, I decided that this
6881 This change does not affect the value of $received_for. It is still set
6882 after address rewriting, but before local_scan() is called.
6884 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6886 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6887 gave an unhelpful panic error message, and a defer error. I have managed to
6888 change this behaviour so that it now rejects any supplied certificate,
6889 which seems right, as the list of acceptable certificates is empty.
6891 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6892 gave an unhelpful defer error. I have not managed to make this reject any
6893 supplied certificates, but the error message it gives is "no certificate
6894 supplied", which is not helpful.
6896 70. exigrep's output now also includes lines that are not associated with any
6897 message, but which match the given pattern. Implemented by a patch from
6898 Martin Sluka, which also tidied up the Perl a bit.
6900 71. Recipient callout verification, like sender verification, was using <> in
6901 the MAIL FROM command. This isn't really the right thing, since the actual
6902 sender may affect whether the remote host accepts the recipient or not. I
6903 have changed it to use the actual sender in the callout; this means that
6904 the cache record is now keyed on a recipient/sender pair, not just the
6905 recipient address. There doesn't seem to be a real danger of callout loops,
6906 since a callout by the remote host to check the sender would use <>.
6907 [SEE ABOVE: changed after hitting problems.]
6909 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6910 temporary errors. However, in the case of such a code being given after
6911 the end of a data transmission (i.e. after ".") Exim was failing to write
6912 a retry record for the message. (Yes, there was some broken host that was
6913 actually sending 8xx at this point.)
6915 73. An unknown lookup type in a host list could cause Exim to panic-die when
6916 the list was checked. (An example that provoked this was putting <; in the
6917 middle of a list instead of at the start.) If this happened during a DATA
6918 ACL check, a -D file could be left lying around. This kind of configuration
6919 error no longer causes Exim to die; instead it causes a defer error. The
6920 incident is still logged to the main and panic logs.
6922 74. Buglet left over from Exim 3 conversion. The message "too many messages
6923 in one connection" was written to the rejectlog but not the mainlog, except
6924 when address rewriting (yes!) was being logged.
6926 75. Added write_rejectlog option.
6928 76. When a system filter was run not as root (that is, when system_filter_user
6929 was set), the values of the $n variables were not being returned to the
6930 main process; thus, they were not subsequently available in the $sn
6933 77. Added +return_path_on_delivery log selector.
6935 78. A connection timeout was being treated differently from recipients deferred
6936 when testing hosts_max_try with a message that was older than the host's
6937 retry timeout. (The host should not be counted, thus allowing all hosts to
6938 be tried at least once before bouncing.) This may have been the cause of an
6939 occasionally reported bug whereby a message would remain on the queue
6940 longer than the retry timeout, but would be bounced if a delivery was
6941 forced. I say "may" because I never totally pinned down the problem;
6942 setting up timeout/retry tests is difficult. See also the next item.
6944 79. The ultimate address timeout was not being applied to errors that involved
6945 a combination of host plus message (for example, a timeout on a MAIL
6946 command). When an address resolved to a number of possible hosts, and they
6947 were not all tried for each delivery (e.g. because of hosts_max_try), a
6948 message could remain on the queue longer than the retry timeout.
6950 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6953 81. Fixed an obscure SMTP outgoing bug which required at least the following
6954 conditions: (a) there was another message waiting for the same server;
6955 (b) the server returned 5xx to all RCPT commands in the first message so
6956 that the message was not completed; (c) the server dropped the connection
6957 or gave a negative response to the RSET that Exim sends to abort the
6958 transaction. The observed case was a dropped connection after DATA that had
6959 been sent in pipelining mode. That is, the server had advertised PIPELINING
6960 but was not implementing it correctly. The effect of the bug was incorrect
6961 behaviour, such as trying another host, and this could lead to a crash.
6967 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6968 and daemon.c were passed as pointers to ints; they should have been
6969 pointers to socklen_t variables (which are typically unsigned ints).
6971 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6974 3. Fixed a really odd bug that affected only the testing scheme; patching a
6975 certain fixed string in the binary changed the value of another string that
6976 happened to be identical to the end of the original first string.
6978 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6979 name", it returns that address as the IP address. On some operating
6980 systems (e.g. Solaris), it also passes back the IP address string as the
6981 "host name". However, on others (e.g. Linux), it passes back an empty
6982 string. Exim wasn't checking for this, and was changing the host name to an
6983 empty string, assuming it had been canonicalized.
6985 5. Although rare, it is permitted to have more than one PTR record for a given
6986 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6987 all the names associated with an address, because they do in Solaris.
6988 However, it seems that they do not in Linux for data that comes from the
6989 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6990 I found this out when I moved to a new Linux workstation and tried to run
6991 the Exim test suite.
6993 To get round this problem I have changed the code so that it now does its
6994 own call to the DNS to look up PTR records when searching for a host name.
6995 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6996 addresses that are only in /etc/hosts are still found.
6998 This behaviour is, however, controlled by an option called host_lookup_
6999 order, which defaults to "bydns:byaddr". If people want to use the other
7000 order, or indeed, just use one or the other means of lookup, they can
7001 specify it in this variable.
7003 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7004 some operating systems, this comes back from gethostbyaddr() as an empty
7005 string, and this is what Exim used to test for. However, it seems that in
7006 other systems, "." is yielded. Exim now tests for this case too.
7008 7. The values of check_spool_space and check_log_space are now held internally
7009 as a number of kilobytes instead of an absolute number of bytes. If a
7010 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7011 kilobyte. This means that much larger values can be stored.
7013 8. Exim monitor: an attempt to get the action menu when not actually pointing
7014 at a message produces an empty menu entitled "No message selected". This
7015 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7016 no entries in it ("Shell widget menu has zero width and/or height"). So I
7017 have added a single, blank menu entry in this case.
7019 9. Added ${quote_local_part.
7021 10. MIME decoding is now applied to the contents of Subject: header lines when
7024 11. Now that a reference to $sender_host_address automatically causes a reverse
7025 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7026 host lookup before query-style lookups in lists that might use this
7027 variable. This has therefore been abolished, and the "net-" prefix is no
7028 longer necessary for query-style lookups.
7030 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7031 have been a typo for LFLAGS, so it has been changed.
7033 13. The install script calls Exim with "-C /dev/null" in order to find the
7034 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7035 to be output. However, since Exim outputs its version number before the
7036 error, it didn't break the script. It just looked ugly. I fixed this by
7037 always allowing "-C /dev/null" if the caller is root.
7039 14. Ignore overlarge ACL variable number when reading spool file - insurance
7040 against a later release with more variables having written the file.
7042 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7043 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7044 this, as well as the form without the "IPv6" on the front.
7046 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7047 OS/Makefile-Darwin file.
7049 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7050 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7052 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7053 variable. However, some OS use ints for inodes. I've added cast to long int
7054 to get rid of the compiler warning.
7056 19. I had forgotten to lock out "/../" in configuration file names when
7057 ALT_CONFIG_PREFIX was set.
7059 20. Routers used for verification do not need to specify transports. However,
7060 if such a router generated a host list, and callout was configured, Exim
7061 crashed, because it could not find a port number from the (non-existent)
7062 transport. It now assumes port 25 in this circumstance.
7064 21. Added the -t option to exigrep.
7066 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7067 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7068 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7069 them is set, LOOKUP_LSEARCH is forced.
7071 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7073 24. Added sender and host information to the "rejected by local_scan()" log
7074 line; previously there was no indication of these.
7076 25. Added .include_if_exists.
7078 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7079 Linux. It turns out that not all file systems support this. Apparently some
7080 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7081 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7082 not supported on the file descriptor, is now ignored when Exim is trying to
7083 sync a directory. This applies only to Linux.
7085 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7087 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7088 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7091 29. Added support for maildirsize files from supplied patch (modified a bit).
7093 30. The use of :fail: followed by an empty string could lead Exim to respond to
7094 sender verification failures with (e.g.):
7096 550 Verification failed for <xxx>
7097 550 Sender verify failed
7099 where the first response line was missing the '-' that indicates it is not
7100 the final line of the response.
7102 31. The loop for finding the name of the user that called Exim had a hardwired
7103 limit of 10; it now uses the value of finduser_retries, which is used for
7104 all other user lookups.
7106 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7109 33. Exim was neglecting to zero errno before one call of strtol() when
7110 expanding a string and expecting an integer value. On some systems this
7111 resulted in spurious "integer overflow" errors. Also, it was casting the
7112 result into an int without checking.
7114 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7115 did not work. The code looks as if it has *never* worked, though it appears
7116 to have been documented since at least release 1.62. I have made it work.
7118 35. The "timeout_DNS" error in retry rules, also documented since at least
7119 1.62, also never worked. As it isn't clear exactly what this means, and
7120 clearly it isn't a major issue, I have abolished the feature by treating it
7121 as "timeout", and writing a warning to the main and panic logs.
7123 36. The display of retry rules for -brt wasn't always showing the error code
7126 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7127 timeout_connect_A, timeout_connect_MX.
7129 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7130 to the empty sender.
7132 39. The daemon was not analysing the content of -oX till after it had closed
7133 stderr and disconnected from the controlling terminal. This meant that any
7134 syntax errors were only noted on the panic log, and the return code from
7135 the command was 0. By re-arranging the code a little, I've made the
7136 decoding happen first, so such errors now appear on stderr, and the return
7137 code is 1. However, the actual setting up of the sockets still happens in
7138 the disconnected process, so errors there are still only recorded on the
7141 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7142 connections (as happens on some IP stacks) was logged at start up time as
7143 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7144 it from "IPv6 and IPv4", which means that two separate sockets are being
7147 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7148 says whether AF_INET or AF_INET6 was passed as an argument.
7150 42. Exiwhat output was messed up when time zones were included in log
7153 43. Exiwhat now gives more information about the daemon's listening ports,
7154 and whether -tls-on-connect was used.
7156 44. The "port" option of the smtp transport is now expanded.
7158 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7159 silently ignored. Now an error message is written to the main and panic
7162 46. There's a new ACL modifier called "logwrite" which writes to a log file
7163 as soon as it is encountered.
7165 47. Added $local_user_uid and $local_user_gid at routing time.
7167 48. Exim crashed when trying to verify a sender address that was being
7170 49. Exim was recognizing only a space character after ".include". It now also
7171 recognizes a tab character.
7173 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7174 extracting the relevant information from the specification. The man page no
7175 longer contains scrambled data for the -d option, and I've added a section
7176 at the front about calling Exim under different names.
7178 51. Added "extra_headers" argument to the "mail" command in filter files.
7180 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7183 53. Installed eximstats 1.29.
7185 54. Added transport_filter_timeout as a generic transport option.
7187 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7188 Cc: header lines. This was required by RFC 822, but it not required by RFC
7191 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7192 incoming messages that did not have them. Now it does so only if the
7193 message originates locally, that is, if there is no associated remote host
7194 address. When Resent- header lines are present, this applies to the Resent-
7195 lines rather than the non-Resent- lines.
7197 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7198 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7200 58. Messages for configuration errors now include the name of the main
7201 configuration file - useful now that there may be more than one file in a
7202 list (.included file names were always shown).
7204 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7205 for those rare installations that do not start the daemon as root or run it
7206 setuid root. I've cut out the call to initgroups() if the daemon is not
7209 60. The Exim user and group can now be bound into the binary as text strings
7210 that are looked up at the start of Exim's processing.
7212 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7214 62. Added $mailstore_basename variable.
7216 63. Installed patch to sieve.c from Michael Haardt.
7218 64. When Exim failed to open the panic log after failing to open the main log,
7219 the original message it was trying to log was written to stderr and debug
7220 output, but if they were not available (the usual case in production), it
7221 was lost. Now it is written to syslog before the two lines that record the
7222 failures to open the logs.
7224 65. Users' Exim filters run in subprocesses under the user's uid. It is
7225 possible for a "deliver" command or an alias in a "personal" command to
7226 provoke an address rewrite. If logging of address rewriting is configured,
7227 this fails because the process is not running as root or exim. There may be
7228 a better way of dealing with this, but for the moment (because 4.30 needs
7229 to be released), I have disabled address rewrite logging when running a
7230 filter in a non-root, non-exim process.
7236 1. The buildconfig auxiliary program wasn't quoting the value set for
7237 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7238 not defined. This bug was masked in 4.22 by the effect that was fixed in
7241 2. Some messages that were rejected after a message id was allocated were
7242 shown as "incomplete" by exigrep. It no longer does this for messages that
7243 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7245 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7246 have allow_domain_literals set, the ID did not get logged in the <= line.
7247 Domain literals are now always recognized in Message-ID: header lines.
7249 4. The first argument for a ${extract expansion item is the key name or field
7250 number. Leading and trailing spaces in this item were not being ignored,
7251 causing some misleading effects.
7253 5. When deliver_drop_privilege was set, single queue runner processes started
7254 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7255 same command in the process it spins off) were not dropping privilege.
7257 6. When the daemon running as "exim" started a queue runner, it always
7258 re-executed Exim in the spun-off process. This is a waste of effort when
7259 deliver_drop_privilege is set. The new process now just calls the
7260 queue-runner function directly.
7266 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7269 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7270 ignored. Though the use of -oP was forcing the writing of a pid file, it
7271 was always written to the default place.
7273 3. If the message "no IP address found for host xxxx" is generated during
7274 incoming verification, it is now followed by identification of the incoming
7275 connection (so you can more easily find what provoked it).
7277 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7279 5. Added some features to "harden" Exim a bit more against certain attacks:
7281 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7282 be put in Local/Makefile. This is like the never_users runtime option,
7283 but it cannot be overridden. The default setting is "root".
7285 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7286 prefix string with which any file named in a -C command line option
7289 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7290 is retained for -C and -D only if the caller of Exim is root. Without
7291 it, the exim user may also use -C and -D and retain privilege.
7293 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7294 command line option is disabled.
7296 6. Macro names set by the -D option must start with an upper case letter, just
7297 like macro names defined in the configuration file.
7299 7. Added "dereference=" facility to LDAP.
7301 8. Two instances of the typo "uknown" in the source files are fixed.
7303 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7304 the Configure-Makefile script screwed up while processing it.
7306 10. Incorporated PCRE 4.4.
7308 11. The SMTP synchronization check was not operating right at the start of an
7309 SMTP session. For example, it could not catch a HELO sent before the client
7310 waited for the greeting. There is now a check for outstanding input at the
7311 point when the greeting is written. Because of the duplex, asynchronous
7312 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7313 way, but not yet received, when the check is performed.
7315 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7316 on TCP/IP sockets, because this apparently causes some broken clients to
7319 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7320 unchanged) from the Cygwin maintainer.
7322 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7323 was supported instead of testing for mbx. Effectively a typo.
7325 15. The spa authenticator server code was not checking that the input it
7326 received was valid base64.
7328 16. The debug output line for the "set" modifier in ACLs was not showing the
7329 name of the variable that was being set.
7331 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7333 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7334 lookup on its own. Something else was needed to trigger the lookup. For
7335 example, a match in host_lookup or the need for a host name in a host list.
7336 Now, if $sender_host_name is referenced and the host name has not yet been
7337 looked up, a lookup is performed. If the lookup fails, the variable remains
7338 empty, and $host_lookup_failed is set to "1".
7340 19. Added "eqi" as a case-independent comparison operator.
7342 20. The saslauthd authentication condition could segfault if neither service
7343 nor realm was specified.
7345 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7346 error message that was logged was misleading, and incoming SMTP
7347 connections were dropped. The message is now more accurate, and temporary
7348 errors are given to SMTP connections.
7350 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7351 (except RSET) with a 421 error, until QUIT is received. However, it was
7352 failing to send a response to QUIT.
7354 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7355 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7356 ACL is now run after the helo_try_verify_hosts code.
7358 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7359 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7360 case-independent, so other case variants are also recognized). Apparently
7361 some systems use these upper case variants.
7363 25. If more than two messages were waiting for the same host, and a transport
7364 filter was specified for the transport, Exim sent two messages over the
7365 same TCP/IP connection, and then failed with "socket operation on non-
7366 socket" when it tried to send the third.
7368 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7370 27. The extern definition of crypt16() in expand.c was not being excluded when
7371 the OS had its own crypt16() function.
7373 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7374 as a preferred synonym for return_size_limit, both as an option and as an
7377 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7379 30. Changed the default configuration ACL to relax the local part checking rule
7380 for addresses that are not in any local domains. For these addresses,
7381 slashes and pipe symbols are allowed within local parts, but the sequence
7382 /../ is explicitly forbidden.
7384 31. SPA server authentication was not clearing the challenge buffer before
7387 32. log_message in a "warn" ACL statement was writing to the reject log as
7388 well as to the main log, which contradicts the documentation and doesn't
7389 seem right (because no rejection is happening). So I have stopped it.
7391 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7392 However, I am unable to do any testing of this.
7394 34. Fixed an infelicity in the appendfile transport. When checking directories
7395 for a mailbox, to see if any needed to be created, it was accidentally
7396 using path names with one or more superfluous leading slashes; tracing
7397 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7399 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7400 contents are added to the log line that is written for every discarded
7401 recipient. (Previously a log_message setting was ignored.)
7403 36. The ${quote: operator now quotes the string if it is empty.
7405 37. The install script runs exim in order to find its version number. If for
7406 some reason other than non-existence or emptiness, which it checks, it
7407 could not run './exim', it was installing it with an empty version number,
7408 i.e. as "exim-". This error state is now caught, and the installation is
7411 38. An argument was missing from the function that creates an error message
7412 when Exim fails to connect to the socket for saslauthd authentication.
7413 This could cause Exim to crash, or give a corrupted message.
7415 39. Added isip, isip4, and isip6 to ${if conditions.
7417 40. The ACL variables $acl_xx are now saved with the message, and can be
7418 accessed later in routers, transports, and filters.
7420 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7421 strings in the file are not string-expanded.
7423 42. If a MAIL command specified a SIZE value that was too large to fit into an
7424 int variable, the check against message_size_limit failed. Such values are
7425 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7426 day this will have to be increased, but I don't think I want to be around
7427 when emails are that large.
7434 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7435 iconv() is not standard in FreeBSD.
7437 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7438 IPv6 enabled. The observed symptom was a segmentation fault on return from
7439 the function os_common_find_running_interfaces() in src/os.c.
7441 3. In the check_special_case() function in daemon.c I had used "errno" as an
7442 argument name, which causes warnings on some systems. This was basically a
7443 typo, since it was named "eno" in the comments!
7445 4. The code that waits for the clock to tick (at a resolution of some fraction
7446 of a second) so as to ensure message-id uniqueness was always waiting for
7447 at least one whole tick, when it could have waited for less. [This is
7448 almost certainly not relevant at current processor speeds, where it is
7449 unlikely to ever wait at all. But we try to future-proof.]
7451 5. The function that sleeps for a time interval that includes fractions of a
7452 second contained a race. It did not block SIGALRM between setting the
7453 timer, and suspending (a couple of lines later). If the interval was short
7454 and the sigsuspend() was delayed until after it had expired, the suspension
7455 never ended. On busy systems this could lead to processes getting stuck for
7458 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7459 process, before it forks any delivery processes. The open lookup caching
7460 mechanism meant that the open file or database connection was passed into
7461 the delivery process. The problem was that delivery processes always tidy
7462 up cached lookup data. This could cause a problem for the next delivery
7463 process started by the queue runner, because the external queue runner
7464 process does not know about the closure. So the next delivery process
7465 still has data in the lookup cache. In the case of a file lookup, there was
7466 no problem because closing a file descriptor in a subprocess doesn't affect
7467 the parent. However, if the lookup was caching a connection to a database,
7468 the connection was closed, and the second delivery process was likely to
7469 see errors such as "PGSQL: query failed: server closed the connection
7470 unexpectedly". The problem has been fixed by closing all cached lookups
7471 in a queue runner before running a delivery process.
7473 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7474 seem to have the "const" qualifier which it has on other OS. I've
7477 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7478 *of the same type* (client or server) with the same public name that an
7479 error should be diagnosed.
7481 9. When Exim looked up a host name for an IP address, but failed to find the
7482 original IP address when looking up the host name (a safety check), it
7483 output the message "<ip address> does not match any IP for NULL", which was
7484 confusing, to say the least. The bug was that the host name should have
7485 appeared instead of "NULL".
7487 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7488 user that is built into the binary, and the -C or -D options is used, root
7489 privilege is dropped before the configuration file is read. In addition,
7490 logging is switched to stderr instead of the normal log files. If the
7491 configuration then re-defines the Exim user, the unprivileged environment
7492 is probably not what is expected, so Exim logs a panic warning message (but
7495 However, if deliver_drop_privilege is set, the unprivileged state may well
7496 be exactly what is intended, so the warning has been cut out in that case,
7497 and Exim is allowed to try to write to its normal log files.
7503 1. smtp_return_error_details was not giving details for temporary sender
7504 or receiver verification errors.
7506 2. Diagnose a configuration error if two authenticators have the same public
7509 3. Exim used not to create the message log file for a message until the first
7510 delivery attempt. This could be confusing when incoming messages were held
7511 for policy or load reasons. The message log file is now created at the time
7512 the message is received, and an initial "Received" line is written to it.
7514 4. The automatically generated man page for command line options had a minor
7515 bug that caused no ill effects; however, a more serious problem was that
7516 the procedure for building the man page automatically didn't always
7517 operate. Consequently, release 4.20 contains an out-of-date version. This
7518 shouldn't happen again.
7520 5. When building Exim with embedded Perl support, the script that builds the
7521 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7522 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7524 6. The freeze_tell option was not being used for messages that were frozen on
7525 arrival, either by an ACL or by local_scan().
7527 7. Added the smtp_incomplete_transaction log selector.
7529 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7530 was accepting AUTH without a new EHLO.
7532 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7533 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7536 10. Logging of TCP/IP connections (when configured) now happens in the main
7537 daemon process instead of the child process, so that the TCP/IP connection
7538 count is more accurate (but it can never be perfect).
7540 11. The use of "drop" in a nested ACL was not being handled correctly in the
7541 outer ACL. Now, if condition failure induced by the nested "drop" causes
7542 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7543 or "require"), the connection is dropped.
7545 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7546 that yield "discard" can now be used with an "accept" or a "discard" verb,
7547 but an error is generated for any others (because I can't see a useful way
7548 to define what should happen).
7550 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7551 are now processed in the same way as lines in the Exim configuration file.
7552 In particular, continuation lines are supported.
7554 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7556 15. Added -ti meaning -t -i.
7558 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7559 domains, and warn by logging if others are found.
7561 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7562 returned from GIFCONF when Exim is trying to find the list of interfaces on
7563 a host. The code in os.c has been modified to copy each ifreq to an aligned
7564 structure in all cases.
7566 Also, in some cases, the returned ifreq's were being copied to a 'struct
7567 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7568 means the last couple of bytes of an IPv6 address could be chopped if the
7569 ifreq contained only a normal sockaddr (14 bytes storage).
7571 18. Named domain lists were not supported in the hosts_treat_as_local option.
7572 An entry such as +xxxx was not recognized, and was treated as a literal
7575 19. Ensure that header lines added by a DATA ACL are included in the reject log
7576 if the ACL subsequently rejects the message.
7578 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7579 MD5 (which is deprecated).
7581 21. When testing a filter file using -bf, Exim was writing a message when it
7582 took the sender from a "From " line in the message, but it was not doing so
7583 when it took $return_path from a Return-Path: header line. It now does.
7585 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7586 with a valid header line field name (a series of printing characters
7587 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7589 23. Changed "disc" in the source to "disk" to conform to the documentation and
7590 the book and for uniformity.
7592 24. Ignore Sendmail's -Ooption=value command line item.
7594 25. When execve() failed while trying to run a command in a pipe transport,
7595 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7596 could be confused with a return value of 69 from the command itself. This
7597 has been changed to 127, the value the shell returns if it is asked to run
7598 a non-existent command. The wording for the related log line suggests a
7599 non-existent command as the problem.
7601 26. If received_header_text expands to an empty string, do not add a Received:
7602 header line to the message. (Well, it adds a token one on the spool, but
7603 marks it "old" so that it doesn't get used or transmitted.)
7605 27. Installed eximstats 1.28 (addition of -nt option).
7607 28. There was no check for failure on the call to getsockname() in the daemon
7608 code. This can fail if there is a shortage of resources on the system, with
7609 ENOMEM, for example. A temporary error is now given on failure.
7611 29. Contrary to the C standard, it seems that in some environments, the
7612 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7613 program. Exim now does this explicitly; it affects the formatting of
7614 timestamps using strftime().
7616 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7617 complaints. I've now initialized all the variables, to avoid this.
7619 32. Header lines added by a system filter were not being "seen" during
7620 transport-time rewrites.
7622 33. The info_callback() function passed to OpenSSL is set up with type void
7623 (*)(SSL *, int, int), as described somewhere. However, when calling the
7624 function (actually a macro) that sets it up, the type void(*)() is
7625 expected. I've put in a cast to prevent warnings from picky compilers.
7627 34. If a DNS black list lookup found a CNAME record, but there were no A
7628 records associated with the domain it pointed at, Exim crashed.
7630 35. If a DNS black list lookup returned more than one A record, Exim ignored
7631 all but the first. It now scans all returned addresses if a particular IP
7632 value is being sought. In this situation, the contents of the
7633 $dnslist_value variable are a list of all the addresses, separated by a
7636 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7637 to accept a host name and all its aliases if the forward lookup for any of
7638 them yielded the IP address of the incoming connection. Now it accepts only
7639 those names whose forward lookup yields the correct IP address. Any other
7640 names are discarded. This closes a loophole whereby a rogue DNS
7641 administrator could create reverse DNS records to break through a
7642 wildcarded host restriction in an ACL.
7644 37. If a user filter or a system filter that ran in a subprocess used any of
7645 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7646 the wrong values were passed to the pipe command ($thisaddress had the
7647 value of $0, $0 had the value of $1, etc). This bug was introduced by
7648 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7650 38. Improved the line breaking for long SMTP error messages from ACLs.
7651 Previously, if there was no break point between 40 and 75 characters, Exim
7652 left the rest of the message alone. Two changes have been made: (a) I've
7653 reduced the minimum length to 35 characters; (b) if it can't find a break
7654 point between 35 and 75 characters, it looks ahead and uses the first one
7655 that it finds. This may give the occasional overlong line, but at least the
7656 remaining text gets split now.
7658 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7659 file descriptors might be low, and that setting 1000 would always raise it.
7660 It turns out that in some environments, the limit is already over 1000 and
7661 that lowering it causes trouble. So now Exim takes care not to decrease it.
7663 40. When delivering a message, the value of $return_path is set to $sender_
7664 address at the start of routing (routers may change the value). By an
7665 oversight, this default was not being set up when an address was tested by
7666 -bt or -bv, which affected the outcome if any router or filter referred to
7669 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7670 log only when "message" or "log_message" are set. However, if one of the
7671 conditions was an address verification, or a call to a nested ACL, the
7672 messages generated by the underlying test were being passed through. This
7673 no longer happens. The underlying message is available in $acl_verify_
7674 message for both "message" and "log_message" expansions, so it can be
7675 passed through if needed.
7677 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7678 new expansion $bh_ to give the encoded byte string without charset
7679 translation. Translation happens only if iconv() is available; HAVE_ICONV
7680 indicates this at build time. HEADERS_CHARSET gives the charset to
7681 translate to; headers_charset can change it in the configuration, and
7682 "headers charset" can change it in an individual filter file.
7684 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7685 that creates RFC 2047 encoded "words" labels them as that charset instead
7686 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7687 expansion operator; (ii) when Exim creates a From: line for a local
7688 message; (iii) when a header line is rewritten to include a "phrase" part.
7690 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7691 buggy, causing it to skip the first lines of messages whose message ID
7692 ended in 'D'. This would not have bitten before Exim release 4.14, because
7693 message IDs were unlikely to end in 'D' before then. The effect was to have
7694 incorrect size information for certain domains.
7696 45. #include "config.h" was missing at the start of the crypt16.c module. This
7697 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7700 46. If there was a timeout during a "random" callout check, Exim treated it as
7701 a failure of the random address, and carried on sending RSET and the real
7702 address. If the delay was just some slowness somewhere, the response to the
7703 original RCPT would be taken as a response to RSET and so on, causing
7704 mayhem of various kinds.
7706 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7707 when I implemented it. It didn't allow for the fact that some option values
7708 may legitimately be negative (e.g. size_addition), and it didn't even do
7709 the right test for positive values.
7711 48. Domain names in DNS records are case-independent. Exim always looks them up
7712 in lower case. Some resolvers return domain names in exactly the case they
7713 appear in the zone file, that is, they may contain uppercase letters. Not
7714 all resolvers do this - some return always lower case. Exim was treating a
7715 change of case by a resolver as a change of domain, similar to a widening
7716 of a domain abbreviation. This triggered its re-routing code and so it was
7717 trying to route what was effectively the same domain again. This normally
7718 caused routing to fail (because the router wouldn't handle the domain
7719 twice). Now Exim checks for this case specially, and just changes the
7720 casing of the domain that it ultimately uses when it transmits the message
7723 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7726 50. If a filter generated a file delivery with a non-absolute name (possible if
7727 no home directory exists for the router), the forbid_file option was not
7730 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7731 the existing equality matching.
7733 52. Exim was using ints instead of ino_t variables in some places where it was
7734 dealing with inode numbers.
7736 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7737 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7738 called TMPDIR, and if it finds it is different, it changes its value.
7740 54. The smtp_printf() function is now made available to local_scan() so
7741 additional output lines can be written before returning. There is also an
7742 smtp_fflush() function to enable the detection of a dropped connection.
7743 The variables smtp_input and smtp_batched_input are exported to
7746 55. Changed the default runtime configuration: the message "Unknown user"
7747 has been removed from the ACL, and instead placed on the localuser router,
7748 using the cannot_route_message feature. This means that any verification
7749 failures that generate their own messages won't get overridden. Similarly,
7750 the "Unrouteable address" message that was in the ACL for unverifiable
7751 relay addresses has also been removed.
7753 56. Added hosts_avoid_esmtp to the smtp transport.
7755 57. The exicyclog script was not checking for the esoteric option
7756 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7757 will work only if exicyclog is run under the appropriate euid.
7759 58. Following a discussion on the list, the rules by which Exim recognises line
7760 endings on incoming messages have been changed. The -dropcr and drop_cr
7761 options are now no-ops, retained only for backwards compatibility. The
7762 following line terminators are recognized: LF CRLF CR. However, special
7763 processing applies to CR:
7765 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7766 nor a local message in the state where . is a terminator.
7768 (ii) If a bare CR is encountered in a header line, an extra space is added
7769 after the line terminator so as not to end the header. The reasoning
7770 behind this is that bare CRs in header lines are most likely either
7771 to be mistakes, or people trying to play silly games.
7773 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7774 was being incorrectly given as 18 bytes larger than it should have been.
7775 This is a VOB (very old bug).
7777 60. This may never have affected anything current, but just in case it has:
7778 When the local host is found other than at the start of a list of hosts,
7779 the local host, those with the same MX, and any that follow, are discarded.
7780 When the list in question was part of a longer list of hosts, the following
7781 hosts (not currently being processed) were also being discarded. This no
7782 longer happens. I'm not sure if this situation could ever has previously
7785 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7788 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7789 header. This is something that is recommended in a new Internet Draft, and
7790 is something that is documented as being done by Sendmail. There are two
7791 possible values. For messages generated by the autoreply transport, Exim
7794 Auto-Submitted: auto-replied
7796 whereas for all other generated messages (e.g. bounces) it adds
7798 Auto-Submitted: auto-generated
7800 63. The "personal" condition in filters now includes a test for the
7801 Auto-Submitted: header. If it contains the string "auto-" the message it
7802 not considered personal.
7804 64. Added rcpt_include_affixes as a generic transport option.
7806 65. Added queue_only_override (default true).
7808 66. Added the syslog_duplication option.
7810 67. If what should have been the first header line of a message consisted of
7811 a space followed by a colon, Exim was mis-interpreting it as a header line.
7812 It isn't of course - it is syntactically invalid and should therefore be
7813 treated as the start of the message body. The misbehaviour could have
7814 caused a number of strange effects, including loss of data in subsequent
7815 header lines, and spool format errors.
7817 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7818 client host had authenticated. This control can now be exercised by an ACL
7819 for more flexibility.
7821 69. By default, callouts do not happen when testing with -bh. There is now a
7822 variant, -bhc, which does actually run the callout code, including
7823 consulting and updating the callout cache.
7825 70. Added support for saslauthd authentication, courtesy of Alexander
7828 71. If statvfs() failed on the spool or log directories while checking their
7829 size for availability, Exim confusingly gave the error "space shortage".
7830 Furthermore, in debugging mode it crashed with a floating point exception.
7831 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7832 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7833 serious problem, Exim now writes to the main and panic logs when this
7834 happens, with details of the failure. It then refuses to accept the
7835 incoming message, giving the message "spool directory problem" or "log
7836 directory problem" with a 421 code for SMTP messages.
7838 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7839 0, 1, and 2 exist, because some OS complain for execs without them (see
7840 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7841 descriptors. However, the code omitted to check that the open succeeded,
7842 causing mysterious errors if for some reason the permissions on /dev/null
7843 got screwed. Now Exim writes a message to the main and panic logs, and
7844 bombs out if it can't open /dev/null.
7846 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7847 interact so that it is all more flexible. It is supposed to remain
7848 backwards compatible. Also added extra_local_interfaces.
7850 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7851 to bomb out with an assertion failure - to the client this appears as a
7852 connection drop. This problem occurs in the part of the code that was taken
7853 from the Samba project. Fortunately, the assertion is in a very simple
7854 function, so I have fixed this by reproducing the function inline in the
7855 one place where it is called, and arranging for authentication to fail
7856 instead of killing the process with assert().
7858 75. The SPA client code was not working when the server requested OEM rather
7859 than Unicode encoding.
7861 76. Added code to make require_files with a specific uid setting more usable in
7862 the case where statting the file as root fails - usually a non-root-mounted
7863 NFS file system. When this happens and the failure is EACCES, Exim now
7864 forks a subprocess and does the per-uid checking as the relevant uid.
7866 77. Added process_log_path.
7868 78. If log_file_path was not explicitly set, a setting of check_log_space or
7869 check_log_inodes was ignored.
7871 79. If a space check for the spool or log partitions fails, the incident is now
7872 logged. Of course, in the latter case the data may get lost...
7874 80. Added the %p formatting code to string_format() so that it can be used to
7875 print addresses in debug_print(). Adjusted all the address printing in the
7876 debugging in store.c to use %p rather than %d.
7878 81. There was a concern that a line of code in smtp_in.c could overflow a
7879 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7880 initially expressed, the concern was not well-founded, because trailing
7881 spaces are removed early. However, if the trailing spaces were followed by
7882 a NULL, they did not get removed, so the overflow was possible. Two fixes
7885 (a) I re-wrote the offending code in a cleaner fashion.
7886 (b) If an incoming SMTP command contains a NULL character, it is rejected
7889 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7890 runs initgroups(), so that if the Exim user is in any additional groups,
7891 they will be used during message reception.
7897 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob