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.
6 Since Exim version 4.94
7 -----------------------
9 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
10 as arguments, so an implementation trying to copy these into a local
11 buffer was taking a taint-enforcement trap. Fix by using dynamically
12 created buffers. Similar fix for radius expansion condition.
14 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
15 reasonable, eg. to count headers. Fix by using dynamically created
16 buffers rather than a local. Do similar fixes for ACL actions "dcc",
17 "log_reject_target", "malware" and "spam"; the arguments are expanded
18 so could be handling tainted values.
20 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
21 broken the (no-op) support for this sendmail command. Restore it
22 to doing nothing, silently, and returning good status.
24 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
25 record path was given (or the default used) without a leading directory
26 path, an error occurred on trying to open it. Use the transport's working
29 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
30 transport. Previously it was the name on the DNS A-record; use instead
31 the head of the CNAME chain leading there (if there is one). This seems
32 to align better with RFC 6125.
34 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
35 smtp_accept_max_per_host allocated resources which were not released
36 when the limit was exceeded. This eventually crashed the daemon. Fix
37 by adding a relase action in that path.
39 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
40 expanded; previously using tainted values was rejected. Fix by using
41 dynamically-created buffers.
43 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
44 Previously a macro used one argument twice; when called with the
45 argument as an expression having side-effects, incorrect operation
46 resulted. Use an inlineable function.
48 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
49 held open for a verify callout. Previously this wan not accounted for
50 and a corrupt onward SMTP conversation resulted.
52 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
53 excluded, not matching the documentation.
55 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
56 was given for the sqlite_dbfile a trap resulted.
58 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
59 "name" argument resulted in a trap. There is no reason to disallow such;
60 this was a coding error.
62 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
63 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
64 spent suspended, ignoring the Posix definition. Previously we assumed
65 it did and a constant offset from real time could be used as a correction.
66 Change to using the same clock source for the start-of-message and the
67 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
68 exists, just to get a clock slightly more aligned to reality.
70 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
71 RFC says it is optional some validators care. The missing char was not
72 intended but triggered by a line-wrap alignement. Discovery and fix by
73 Guillaume Outters, hacked on by JH.
75 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
76 name being quoted was tainted a trap would be taken. Fix by using
77 dynamicaly created buffers. The routine could have been called by a
78 rewrite with the "h" flag, by using the "-F" command-line option, or
79 by using a "name=" option on a control=submission ACL modifier.
81 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
82 Previously when a whitespace character was specified it was not inserted
83 after removing the newline.
85 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
86 is_tainted() had an off-by-one error in the overenthusiastic direction.
87 Find and fix by Gavan. Although NetBSD is not a supported platform for
88 4.94 this bug could affect other platforms.
90 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
91 is_tainted() had an off-by-one error in the overenthusiastic direction.
92 Find and fix by Gavan. Although NetBSD is not a supported platform for
93 4.94 this bug could affect other platforms.
94 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
95 Previously when a whitespace character was specified it was not inserted
96 after removing the newline.
98 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
99 the domain part of the recipient address. This overrides any tls_sni
100 option set, which was previously used.
102 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
105 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
106 than one server was defined and depending on the platform memory layout
107 details, an internal consistency trap could be hit while walking the list
110 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
111 files. The value is used by the authresults expansion item. Previously
112 if this was used in a router or transport, a crash could result.
114 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
115 applied. This resulted, if any header-line rewrite rules were configured,
116 in a panic-log trigerrable by sending a message with a long address in
117 a header. Fix by increaing the arbitrary limit to larger than a single
118 (dewrapped) 5322 header line maximum size.
120 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
121 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
122 RFC 6648 which deprecates X- options in protocols as a general practice.
123 Changeover between the implementations is handled by the mechanisms
126 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
127 a remote which uses callout/hold. Previously the local was queued.
129 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
132 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
134 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
135 authenticator client_send option. Previously the next char, after a pair
136 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
137 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
138 documentation. There is still no way to get a leading ^ immediately
139 after a NUL (ie. for the password of a PLAIN method authenticator.
141 JH/39 Bug 2691: fix $local_part_data. When the matching list element
142 referred to a file, bad data was returned. This likely also affected
145 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
146 left undeleted; the attempt to re-create it then failed - resulting in
147 the usual "SIGHUP tp have daemon reload configuration" to not work.
148 This affected any platform not supporting "abstract" Unix-domain
149 sockets (i.e. not Linux).
151 JH/42 Bug 2692: Harden against a peer which reneges on a 452 "too many
152 recipients" response to RCPT in a later response, with a 250. The
153 previous coding assumed this would not happen, and under PIPELINING
154 would result in both lost and duplicate recipients for a message.
156 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
157 Previously the weighting was incorrectly applied. Similar fix for socks
158 proxies. Found and fixed by Heiko Schlichting.
160 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
161 not handle sub-lists included using the +namedlist syntax. While
162 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
163 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
166 HS/01 Enforce absolute PID file path name.
168 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
170 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
172 PP/02 Bug 2643: Correct TLS DH constants.
173 A missing NUL termination in our code-generation tool had led to some
174 incorrect Diffie-Hellman constants in the Exim source.
175 Reported by kylon94, code-gen tool fix by Simon Arlott.
177 PP/03 Impose security length checks on various command-line options.
178 Fixes CVE-2020-SPRSS reported by Qualys.
180 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
181 better. Reported by Qualys.
183 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
184 providing a particularly obnoxious sender full name.
191 JH/01 Avoid costly startup code when not strictly needed. This reduces time
192 for some exim process initialisations. It does mean that the logging
193 of TLS configuration problems is only done for the daemon startup.
195 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
197 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
198 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
201 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
202 DKIM signing is being done. Previously a transport_filter would always
203 disable CHUNKING, falling back to traditional DATA.
205 JH/05 Regard command-line receipients as tainted.
207 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
209 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
210 PAM library frees one of the arguments given to it, despite the
211 documentation. Therefore a plain malloc must be used.
213 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
214 on-stack buffers were used, resulting in a taint trap when DSN information
215 copied from a received message was written into the buffer.
217 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
218 the ordering of its ARC headers. This caused a crash.
220 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
221 a new record was being constructed with information from the peer, a trap
224 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
225 installation would get error messages from DMARC verify, when it hit the
226 nonexistent file indicated by the default. Distros wanting DMARC enabled
227 should both provide the file and set the option.
228 Also enforce no DMARC verification for command-line sourced messages.
230 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
231 could, depending on the platform, hang at the STARTTLS response.
233 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
234 message on a connection. Previously if one message had ARC headers and
235 the following one did not, a crash could result when adding an
236 Authentication-Results: header.
238 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
239 Exim main code and Exim-related utities. The introduction of taint
240 tracking also did many adjustments to string handling. Since then, eximon
241 frequently terminated with an assert failure.
243 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
244 check for 452 responses. This slightly helps the inefficieny of doing
245 a large alias-expansion into a recipient-limited target. The max_rcpt
246 transport option still applies (and at the current default, will override
247 the new feature). The check is done for either cause of synch, and forces
248 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
249 connection. The new facility is not tunable at this time.
251 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
252 library live data was being used, so the results became garbage. Make
253 copies while it is still usable.
255 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
256 on delivery deferred (==) and failed (**) lines (if a delivery was
257 attemtped). Previously it was only on completion (=>) lines.
259 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
260 for the expansion of the server_scram_iter and server_scram_salt options.
262 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
263 are now specifically given a NO_DATA response without hitting the system
264 resolver. The library goes on to do the now-standard TXT lookup.
265 Use of dnsdb lookups is not affected.
267 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
268 only retrieve the errormessage once. Previously two calls to dlerror()
269 were used, and the second one (for mainlog/paniclog) retrieved null
272 JH/20 Taint checking: disallow use of tainted data for
273 - the appendfile transport file and directory options
274 - the pipe transport command
275 - the autoreply transport file, log and once options
276 - file names used by the redirect router (including filter files)
278 - paths used by single-key lookups
279 Previously this was permitted.
281 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
282 adjusted the size of a major service buffer; this failed because the
283 buffer was in use at the time. Change to a compile-time increase in the
284 buffer size, when this authenticator is compiled into exim.
286 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
287 previous fast-mode was untenable in the face of glibs using mmap to
288 support larger malloc requests.
290 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
291 New values supported, if defined on system where compiled:
292 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
293 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
295 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
296 running a limited number of proceses in parallel, a benefit is gained. The
297 amount varies with the platform hardware and load. The use of the option
298 queue_run_in_order means we cannot do this, as ordering becomes
301 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
302 had introduced a string-copy (for ensuring NUL-termination) which was not
303 appropriate for that case, which can include embedded NUL bytes in the
304 block of data. Investigation showed the copy to actually be needless, the
305 data being length-specified.
307 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
308 done during a receiving connection, and both used TLS, global info was
309 used rather than per-connection info for tracking the state of data
310 queued for transmission. This could result in a connection hang.
312 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
313 Previously, when delivering serveral messages down a single connection
314 only the first would provide a SIZE. This was due to the size information
315 not being properly tracked.
317 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
318 TAI (at 37 seconds currently), pretend to be in UTC for time-related
319 expansion and logging. Previously, spurious values such as a future
320 minute could be seen.
322 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
323 it could crash from a null-deref. This could also affect the
324 ${addresses: } operator and ${readsock } item.
326 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
327 message following a mime one, the variable was not reset.
329 JH/30 When an pipelined-connect fails at the first response, assume incorrect
330 cached capability (perhaps the peer reneged?) and immediately retry in
333 JH/31 Fix spurious detection of timeout while writing to transport filter.
335 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
336 an attempt to copy the string was made before checking it.
338 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
339 taint of the lookup key was maintained; we now regard the presence in the
340 filesystem as sufficient validation.
342 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
343 argument is supplied.
345 JH/35 The dsearch lookup now requires that the directory is an absolute path.
346 Previously this was not checked, and nonempty relative paths made an
347 access under Exim's current working directory.
349 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
350 Previously no event was raised.
352 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
353 parameter supplied by the sender MAIL FROM command. Previously it was
354 ignored, and only the check_spool_space option value for the required
357 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
358 the size of the signing public-key. Previously it was instead giving
359 the size of the signature hash.
361 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
362 the default. See the (new) dkim_verify_min_keysizes option.
364 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
365 and an ACL use a lookup for checking either the local_part or domain,
366 stale data could be accessed. Ensure that variable references are
367 dropped between messages.
369 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
370 by the client was not checked as pointing within response data before
371 being used. A malicious client could thus cause an out-of-bounds read and
372 possibly gain authentication. Fix by adding the check.
374 JH/42 Internationalisation: change the default for downconversion in the smtp
375 transport to be "if needed". Previously it was "as previously set" for
376 the message, which usually meant "if needed" for message-submission but
377 "no" for everything else. However, MTAs have been seen using SMTPUTF8
378 even when the envelope addresses did not need it, resulting in forwarding
379 failures to non-supporting MTAs. A downconvert in such cases will be
380 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
381 transport. The change does mean that addresses needing conversion will
382 be converted when previously a delivery failure would occur.
384 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
385 response was received it would be used unchecked in a fail-DSN, violating
386 standards on line-length limits. Truncate if needed.
388 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
389 doesn't work. (Additionally add a new main config option to configure the
396 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
397 side, to decode a TLS 1.3 packet capture.
399 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
400 Previously the default library behaviour applied, sending two, each in
403 JH/03 Debug output for ACL now gives the config file name and line number for
406 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
408 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
410 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
411 buffer overrun for (non-chunking) other transports.
413 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
414 TLS1.3, means that a server rejecting a client certificate is not visible
415 to the client until the first read of encrypted data (typically the
416 response to EHLO). Add detection for that case and treat it as a failed
417 TLS connection attempt, so that the normal retry-in-clear can work (if
418 suitably configured).
420 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
421 and/or domain. Found and fixed by Jason Betts.
423 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
424 configuration). If a CNAME target was not a wellformed name pattern, a
427 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
428 the OS reports them interleaved with other addresses.
430 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
431 used both for input and for a verify callout, both encrypted, SMTP
432 responses being sent by the server could be lost. This resulted in
433 dropped connections and sometimes bounces generated by a peer sending
436 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
437 string. Previously it was possible to cause undefined behaviour in a
438 library routine (usually a crash). Found by "zerons".
440 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
443 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
444 API was removed, so update to use the newer ones.
446 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
447 any timeout set, is taking a long time. Previously we would hang on to a
448 rotated logfile "forever" if the input was arriving with long gaps
449 (a previous attempt to fix addressed lack, for a long time, of initial
452 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
453 shared (NFS) environment. The length of the tempfile name is now
454 4 + 16 ("hdr.$message_exim_id") which might break on file
455 systems which restrict the file name length to lower values.
458 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
459 shared (NFS) environment.
461 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
462 did for all versions <4.90). Notably -M, -m, --invert, -I may be
465 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
466 on some platforms for bit 31.
468 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
469 to changes apparently associated with TLS1.3 handling some of the APIs
470 previously used were either nonfunctional or inappropriate. Strings
471 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
472 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
473 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
474 This affects log line X= elements, the $tls_{in,out}_cipher variables,
475 and the use of specific cipher names in the encrypted= ACL condition.
477 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
479 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
480 verification result was not updated unless hosts_require_ocsp applied.
482 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
483 queue_list_requires_admin set to false, non-admin users were denied the
486 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
487 directory-of-certs mode. Previously they were advertised despite the
490 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
491 A single TCP connection by a client will now hold a TLS connection open
492 for multiple message deliveries, by default. Previously the default was to
495 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
496 default. If built with the facility, DANE will be used. The facility
497 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
499 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
500 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
501 must be defined and you must still, unless you define DISABLE_TLS, manage
502 the the include-dir and library-file requirements that go with that
503 choice. Non-TLS builds are still supported.
505 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
508 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
509 default. If the platform supports and has the facility enabled, it will
510 be requested on all coneections.
512 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
513 controlled by the build-time option SUPPORT_PIPE_CONNECT.
515 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
517 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
518 success-DSN messages. Previously the From: header was always the default
519 one for these; the option was ignored.
521 JH/28 Fix the timeout on smtp response to apply to the whole response.
522 Previously it was reset for every read, so a teergrubing peer sending
523 single bytes within the time limit could extend the connection for a
524 long time. Credit to Qualsys Security Advisory Team for the discovery.
526 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
527 delivery address, which leaked information of the results of local
528 forwarding. Change to the original envelope recipient address, per
531 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
532 requested. Previously not bounce was generated and a log entry of
533 error ignored was made.
535 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
537 JH/32 Introduce a general tainting mechanism for values read from the input
538 channel, and values derived from them. Refuse to expand any tainted
539 values, to catch one form of exploit.
541 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
542 was unused and the unexpanded text used for the test. Found and
543 fixed by Ruben Jenster.
545 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
546 an attempt to use a TLS library read routine dereffed a nul pointer,
549 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
550 them in our smtp response.
552 JH/36 Have the general router option retry_use_local_part default to true when
553 any of the restrictive preconditions are set (to anything). Previously it
554 was only for check_local user. The change removes one item of manual
555 configuration which is required for proper retries when a remote router
556 handles a subset of addresses for a domain.
558 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
559 link count into consideration.
561 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
562 caused the extension of big_buffer, the following lines were ignored.
564 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
565 accordance with RFC 2308. Previously there was no expiry, so a longlived
566 receive process (eg. due to ACL delays) versus a short SOA value could
569 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
571 JH/39 Promote DMARC support to mainline.
573 JH/40 Bug 2452: Add a References: header to DSNs.
575 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
576 parameters. The relevant library call is documented as "Deprecated: This
577 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
578 3.6.0, DH parameters are negotiated following RFC7919."
580 HS/06 Change the default of dnssec_request_domains to "*"
582 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
583 carried on and emitted a BDAT command, even when PIPELINING was not
586 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
587 buffer was used for the filename, resulting in a trap when tainted
588 arguments (eg. $domain) were used.
590 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
591 recommended to avoid a possible server-load attack. The feature can be
592 re-enabled via the openssl_options main cofiguration option.
594 JH/45 local_scan API: documented the current smtp_printf() call. This changed
595 for version 4.90 - adding a "more data" boolean to the arguments.
596 Bumped the ABI version number also, this having been missed previously;
597 release versions 4.90 to 4.92.3 inclusive were effectively broken in
598 respect of usage of smtp_printf() by either local_scan code or libraries
599 accessed via the ${dlfunc } expansion item. Both will need coding
600 adjustment for any calls to smtp_printf() to match the new function
601 signature; a FALSE value for the new argument is always safe.
603 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
604 the file-offset (which the Linux syscall does, and exim expects); this
605 resulted in an indefinite loop.
607 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
608 to do ARC verification. The Authentication-Results: header line added
609 by the configuration then had no ARC item.
615 JH/01 Remove code calling the customisable local_scan function, unless a new
616 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
618 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
619 non-signal-safe functions being used.
621 JH/03 Bug 2269: When presented with a received message having a stupidly large
622 number of DKIM-Signature headers, disable DKIM verification to avoid
623 a resource-consumption attack. The limit is set at twenty.
625 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
626 report of oldest_pass in ${authres } in consequence, and separate out
627 some descriptions of reasons for verification fail.
629 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
630 files in the spool were present and unlocked. A queue-runner could spot
631 them, resulting in a duplicate delivery. Fix that by doing the unlock
632 after the unlink. Investigation by Tim Stewart. Take the opportunity to
633 add more error-checking on spoolfile handling while that code is being
636 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
637 No known attacks, no CVE, this is defensive hardening.
639 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
640 a queue-runner could start a delivery while other operations were ongoing.
641 Cutthrough delivery was a common victim, resulting in duplicate delivery.
642 Found and investigated by Tim Stewart. Fix by using the open message data
643 file handle rather than opening another, and not locally closing it (which
644 releases a lock) for that case, while creating the temporary .eml format
645 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
647 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
648 $sender_verify_failure/$recipient_verify_failure to "random".
650 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
653 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
654 Previously this would segfault.
656 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
659 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
660 like zero, since the resolver should be doing this for us, But we need one
661 as a CNAME but no MX presence gets the CNAME returned; we need to check
662 that doesn't point to an MX to declare it "no MX returned" rather than
663 "error, loop". A new main option is added so the older capability of
664 following some limited number of chain links is maintained.
666 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
668 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
669 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
670 now-deprecated earlier definitions used only specified the range up to TLS
671 1.2 (in the older-version library docs).
673 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
675 JH/15 Rework TLS client-side context management. Stop using a global, and
676 explicitly pass a context around. This enables future use of TLS for
677 connections to service-daemons (eg. malware scanning) while a client smtp
678 connection is using TLS; with cutthrough connections this is quite likely.
680 JH/16 Fix ARC verification to do AS checks in reverse order.
682 JH/17 Support a "tls" option on the ${readsocket } expansion item.
684 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
685 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
686 Previously the "utf8" would be re-prepended for every additional message.
688 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
689 Previously thery were accepted, resulting in issues when attempting to
690 forward messages to a non-supporting MTA.
692 PP/02 Let -n work with printing macros too, not just options.
694 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
695 one parent address was copied, and bogus data was used at delivery-logging
696 time. Either a crash (after delivery) or bogus log data could result.
697 Discovery and analysis by Tim Stewart.
699 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
700 Previously if the string ended mid-character, we did not insert the
701 promised '?' replacement.
703 PP/04 Documentation: current string operators work on bytes, not codepoints.
705 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
706 should pack well giving a smaller memory footprint so better caching and
707 therefore performance. Group the declarations where this can't be done so
708 that the byte-sized flag variables are not interspersed among pointer
709 variables, giving a better chance of good packing by the compiler.
711 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
712 non-null, to avoid issues with sites running BATV. Previously reports were
713 sent with an empty envelope sender so looked like bounces.
715 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
716 The ignore_error flag wasn't being returned from the filter subprocess so
717 was not set for later routers. Investigation and fix by Matthias Kurz.
719 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
720 and a msg:complete for the whole, when a message is manually removed using
721 -Mrm. Developement by Matthias Kurz, hacked on by JH.
723 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
724 a "Gnu special" function, asprintf() in the DB utility binary builds; I
725 hope that is portable enough.
727 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
728 requiring a known-CA anchor certificate; make it now rely entirely on the
729 TLSA as an anchor. Checking the name on the leaf cert against the name
730 on the A-record for the host is still done for TA (but not for EE mode).
732 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
733 included in delivery lines for non-proxied connections, when compiled with
734 SUPPORT_SOCKS and running with proxy logging enabled.
736 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
737 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
738 move the existing event to fire before the normal logging of message
739 failure so that custom logging is bracketed by normal logging.
741 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
742 msg:fail:internal event. Developement by Matthias Kurz.
744 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
745 far too small for todays use of crypto signatures stored there. Go all
746 the way to the max DNS message size of 64kB, even though this might be
747 overmuch for IOT constrained device use.
749 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
750 copy a string over itself. The library routine is documented as not
751 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
753 JH/32 For main options check_spool_space and check_inode_space, where the
754 platform supports 64b integers, support more than the previous 2^31 kB
755 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
756 the previous G, M, k.
758 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
759 $authenticated_fail_id variable on authentication failure. Previously
762 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
763 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
764 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
765 GNUTLS_SEC_PARAM_MEDIUM.
767 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
768 side. Previously we would continue as if no SNI had been received.
770 JH/36 Harden the handling of string-lists. When a list consisted of a sole
771 "<" character, which should be a list-separator specification, we walked
772 off past the nul-terimation.
774 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
775 causes) even when the retry time is not yet met. Previously they were
776 not, meaning that when (say) an account was over-quota and temp-rejecting,
777 and multiple senders' messages were queued, only one sender would get
778 notified on each configured delay_warning cycle.
780 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
782 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
783 cipher-suites, an error can be left on the stack even for a succeeding
784 accept; this results in impossible error messages when a later operation
787 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
788 return error codes indicating retry. Under TLS1.3 this becomes required.
790 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
791 it only wrote the new authenticators, resulting in a lack of tracking of
792 peer changes of ESMTP extensions until the next cache flush.
794 JH/41 Fix the loop reading a message header line to check for integer overflow,
795 and more-often against header_maxsize. Previously a crafted message could
796 induce a crash of the recive process; now the message is cleanly rejected.
798 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
799 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
805 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
806 When redis_servers is set to a list of > 1 element, and the Redis servers
807 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
808 case of MOVED into a DEFER case instead, thus moving the query onto the
809 next server in the list. For a cluster of N elements, all N servers must
810 be defined in redis_servers.
812 GF/02 Catch and remove uninitialized value warning in exiqsumm
813 Check for existence of @ARGV before looking at $ARGV[0]
815 JH/01 Replace the store_release() internal interface with store_newblock(),
816 which internalises the check required to safely use the old one, plus
817 the allocate and data copy operations duplicated in both (!) of the
818 extant use locations.
820 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
821 modifier. This matches the restriction on the commandline.
823 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
824 Previously only the last row was returned.
826 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
827 we assumed that tags in the header were well-formed, and parsed the
828 element content after inspecting only the first char of the tag.
829 Assumptions at that stage could crash the receive process on malformed
832 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
833 While running the DKIM ACL we operate on the Permanent memory pool so that
834 variables created with "set" persist to the DATA ACL. Also (at any time)
835 DNS lookups that fail create cache records using the Permanent pool. But
836 expansions release any allocations made on the current pool - so a dnsdb
837 lookup expansion done in the DKIM ACL releases the memory used for the
838 DNS negative-cache, and bad things result. Solution is to switch to the
839 Main pool for expansions.
840 While we're in that code, add checks on the DNS cache during store_reset,
841 active in the testsuite.
842 Problem spotted, and debugging aided, by Wolfgang Breyha.
844 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
845 When none of the hosts presented to a transport match an already-open
846 connection, close it and proceed with the list. Previously we would
847 queue the message. Spotted by Lena with Yahoo, probably involving
850 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
851 Previously a spurious "250 OK id=" response was appended to the proper
854 JH/08 The "support for" informational output now, which built with Content
855 Scanning support, has a line for the malware scanner interfaces compiled
856 in. Interface can be individually included or not at build time.
858 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
859 by the template makefile "src/EDITME". The "STREAM" support for an older
860 ClamAV interface method is removed.
862 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
863 rows affected is given instead).
865 JH/11 The runtime Berkeley DB library version is now additionally output by
866 "exim -d -bV". Previously only the compile-time version was shown.
868 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
869 SMTP connection. Previously, when one had more receipients than the
870 first, an abortive onward connection was made. Move to full support for
871 multiple onward connections in sequence, handling cutthrough connection
872 for all multi-message initiating connections.
874 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
875 routers. Previously, a multi-recipient message would fail to match the
876 onward-connection opened for the first recipient, and cause its closure.
878 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
879 a timeout on read on a GnuTLS initiating connection, resulting in the
880 initiating connection being dropped. This mattered most when the callout
881 was marked defer_ok. Fix to keep the two timeout-detection methods
884 JH/15 Relax results from ACL control request to enable cutthrough, in
885 unsupported situations, from error to silently (except under debug)
886 ignoring. This covers use with PRDR, frozen messages, queue-only and
889 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
891 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
892 metadata, resulting in a crash in free().
894 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
895 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
896 Broken also in d185889f4, with init system revamp.
898 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
899 Previously we abruptly closed the connection after reading a malware-
900 found indication; now we go on to read the "scan ok" response line,
903 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
904 ACL. Previously, a crash would result.
906 JH/19 Speed up macro lookups during configuration file read, by skipping non-
907 macro text after a replacement (previously it was only once per line) and
908 by skipping builtin macros when searching for an uppercase lead character.
910 JH/20 DANE support moved from Experimental to mainline. The Makefile control
911 for the build is renamed.
913 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
914 was allocated for every new TLS startup, meaning one per message. Fix
915 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
917 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
918 reported the original. Fix to report (as far as possible) the ACL
919 result replacing the original.
921 JH/23 Fix memory leak during multi-message connections using STARTTLS under
922 OpenSSL. Certificate information is loaded for every new TLS startup,
923 and the resources needed to be freed.
925 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
927 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
930 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
931 DATA response info to the (existing) per-recipient response info for
932 the "C=" log element. It can have useful tracking info from the
933 destination system. Patch from Simon Arlott.
935 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
936 length value. Previously this would segfault.
938 HS/02 Support Avast multiline protoocol, this allows passing flags to
939 newer versions of the scanner.
941 JH/28 Ensure that variables possibly set during message acceptance are marked
942 dead before release of memory in the daemon loop. This stops complaints
943 about them when the debug_store option is enabled. Discovered specifically
944 for sender_rate_period, but applies to a whole set of variables.
945 Do the same for the queue-runner and queue-list loops, for variables set
946 from spool message files. Do the same for the SMTP per-message loop, for
947 certain variables indirectly set in ACL operations.
949 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
950 as a multi-recipient message from a mailinglist manager). The coding had
951 an arbitrary cutoff number of characters while checking for more input;
952 enforced by writing a NUL into the buffer. This corrupted long / fast
953 input. The problem was exposed more widely when more pipelineing of SMTP
954 responses was introduced, and one Exim system was feeding another.
955 The symptom is log complaints of SMTP syntax error (NUL chars) on the
956 receiving system, and refused recipients seen by the sending system
957 (propating to people being dropped from mailing lists).
958 Discovered and pinpointed by David Carter.
960 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
961 replaced by the ${authresults } expansion.
963 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
965 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
966 allows proper process termination in container environments.
968 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
969 Previously the "final dot" had a newline after it; ensure it is CR,LF.
971 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
972 and "err_perm", deprecated since 4.83 when the RFC-defined words
973 "temperror" and "permerror" were introduced.
975 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
976 transport-filters or DKIM-signing. The restriction was lost in the
977 consolidation of verify-callout and delivery SMTP handling.
978 Extend the restriction to also cover ARC-signing.
980 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
981 in defer=pass mode supply a 450 to the initiator. Previously the message
984 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
985 tls_require_ciphers is used as before.
987 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
988 "pass_unscanned". Only tmpfails from the scanner are written to
989 the paniclog, as they may require admin intervention (permission
990 denied, license issues). Other scanner errors (like decompression
991 bombs) do not cause a paniclog entry.
993 JH/36 Fix reinitialisation of DKIM logging variable between messages.
994 Previously it was possible to log spurious information in receive log
997 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
998 triggered odd behaviour from Outlook Express clients.
1000 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1003 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1004 since the IETF WG has not yet settled on that versus the original
1005 "bare" representation.
1007 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1008 Previously the millisecond value corrupted the output.
1009 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1010 corrupted the output.
1016 JH/01 Rework error string handling in TLS interface so that the caller in
1017 more cases is responsible for logging. This permits library-sourced
1018 string to be attached to addresses during delivery, and collapses
1019 pairs of long lines into single ones.
1021 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1022 during configuration. Wildcards are allowed and expanded.
1024 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1025 This permits better logging.
1027 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1028 do not close it down and have the child transport start it up again on
1029 the passed-on TCP connection. Instead, proxy the child (and any
1030 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1031 affected: the continued delivery log lines do not have any DNSSEC, TLS
1032 Certificate or OCSP information. TLS cipher information is still logged.
1034 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1035 identical IP addresses on different listening ports. Will also affect
1038 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1039 add noisy ifdef guards to special-case this sillyness.
1040 Patch from Bernd Kuhls.
1042 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1043 than 255 are no longer allowed.
1045 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1046 Disable the session-cache too, which might reduce our load. Since we
1047 currrectly use a new context for every connection, both as server and
1048 client, there is no benefit for these.
1049 GnuTLS appears to not support tickets server-side by default (we don't
1050 call gnutls_session_ticket_enable_server()) but client side is enabled
1051 by default on recent versions (3.1.3 +) unless the PFS priority string
1054 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1055 <https://reproducible-builds.org/specs/source-date-epoch/>.
1057 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1058 the check for any unsuccessful recipients did not notice the limit, and
1059 erroneously found still-pending ones.
1061 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1062 MSG_MORE. Only in-clear (not on TLS connections).
1064 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1065 transport-filter is involved we can buffer the headers in memory for
1066 creating the signature, and read the spool data file once for the
1067 signature and again for transmission.
1069 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1070 4.77 as the kernel support then wasn't solid, having issues in 64bit
1071 mode. Now, it's been long enough. Add support for FreeBSD also.
1073 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1074 case where the routing stage had gathered several addresses to send to
1075 a host before calling the transport for the first, we previously failed
1076 to close down TLS in the old transport process before passing the TCP
1077 connection to the new process. The new one sent a STARTTLS command
1078 which naturally failed, giving a failed delivery and bloating the retry
1079 database. Investigation and fix prototype from Wolfgang Breyha.
1081 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1082 false-negatives in the check that the sender had not preempted a response
1083 or prompt from Exim (running as a server), due to that code's lack of
1084 awareness of the SMTP input buffering.
1086 PP/04 Add commandline_checks_require_admin option.
1087 Exim drops privileges sanely, various checks such as -be aren't a
1088 security problem, as long as you trust local users with access to their
1089 own account. When invoked by services which pass untrusted data to
1090 Exim, this might be an issue. Set this option in main configuration
1091 AND make fixes to the calling application, such as using `--` to stop
1094 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1095 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1096 responses to those, into a single TLS record each way (this usually means
1097 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1100 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1101 affects you only if you're dancing at the edge of the param size limits.
1102 If you are, and this message makes sense to you, then: raise the
1103 configured limit or use OpenSSL 1.1. Nothing we can do for older
1106 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1107 cmdline element to get the documented default one. Previously it was
1110 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1111 are unsuable for non-message-specific reasons - eg. connection timeout,
1112 banner-time rejection.
1114 JH/16 Fix logging of delivery remote port, when specified by router, under
1117 PP/06 Repair manualroute's ability to take options in any order, even if one
1118 is the name of a transport.
1121 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1123 JH/17 Change the list-building routines interface to use the expanding-string
1124 triplet model, for better allocation and copying behaviour.
1126 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1127 Previously it was constructed the first time a possibly-matching string
1128 was met in the configuration file input during startup; now it is done
1131 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1132 compatible one, to avoid the (poorly documented) possibility of a config
1133 file in the working directory redirecting the DB files, possibly correpting
1134 some existing file. CVE-2017-10140 assigned for BDB.
1136 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1137 cache-hot. Previously, although the result was properly cached, the
1138 initial verify call returned a defer.
1140 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1141 the main verify for receipient in uncached-mode.
1143 JH/22 Retire historical build files to an "unsupported" subdir. These are
1144 defined as "ones for which we have no current evidence of testing".
1146 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1147 if present. Previously it was ignored.
1149 JH/24 Start using specified-initialisers in C structure init coding. This is
1150 a C99 feature (it's 2017, so now considered safe).
1152 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1153 if was a fixed-sized field and bitmask ops via macros; it is now more
1156 PP/07 GitHub PR 56: Apply MariaDB build fix.
1157 Patch provided by Jaroslav Škarvada.
1159 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1160 during Coverity cleanups [4.87 JH/47]
1161 Diagnosis and fix provided by Michael Fischer v. Mollard.
1163 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1164 the right size to place the terminating semicolon on its own folded
1165 line, the header hash was calculated to an incorrect value thanks to
1166 the (relaxed) space the fold became.
1168 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1169 and confused the parent.
1171 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1172 which could crash as a result. This could lead to undeliverable messages.
1174 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1177 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1178 matters on fast-turnover and PID-randomising systems, which were getting
1179 out-of-order delivery.
1181 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1182 a possibly-overlapping copy. The symptom was that "Remote host closed
1183 connection in response to HELO" was logged instead of the actual 4xx
1186 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1187 Previously only that bufferd was discarded, resulting in SYMTP command
1190 JH/32 DKIM: when a message has multiple signatures matching an identity given
1191 in dkim_verify_signers, run the dkim acl once for each. Previously only
1192 one run was done. Bug 2189.
1194 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1195 "panic the current process" to "deliberately defer". The panic log is
1196 still written with the problem list name; the mail and reject logs now
1197 get a temp-reject line for the message that was being handled, saying
1198 something like "domains check lookup or other defer". The SMTP 451
1199 message is still "Temporary local problem".
1201 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1202 A crafted sequence of BDAT commands could result in in-use memory beeing
1203 freed. CVE-2017-16943.
1205 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1206 from SMTP input. Previously it was always done; now only done for DATA
1207 and not BDAT commands. CVE-2017-16944.
1209 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1210 to the message (such as an overlong header line). Previously this was
1211 not done and we did not exit BDAT mode. Followon from the previous item
1212 though a different problem.
1218 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1219 than -2003 did; needs libidn2 in addition to libidn.
1221 JH/02 The path option on a pipe transport is now expanded before use.
1223 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1224 Patch provided by "Björn", documentation fix added too.
1226 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1227 missing a wire-to-host endian conversion.
1229 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1230 close after a BDAT command line could be taken as a following command,
1231 giving a synch failure. Fix by only checking for synch immediately
1232 before acknowledging the chunk.
1234 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1235 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1236 macro. Patches provided by Josh Soref.
1238 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1239 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1240 by IANA as a service extension. However, John Klensin suggests that we
1243 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1244 the dkim code may be unix-mode line endings rather than smtp wire-format
1245 CRLF, so prepend a CR to any bare LF.
1247 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1248 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1250 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1251 the first were themselves being wrongly included in the feed into dkim
1252 processing; with most chunk sizes in use this resulted in an incorrect
1253 body hash calculated value.
1255 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1256 DKIM signature block, for verification. Although advised against by
1257 standards it is specifically not ruled illegal.
1259 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1261 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1262 missing a body hash (the bh= tag).
1264 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1265 It seems that HAProxy sends the Proxy Protocol information in clear and
1266 only then does a TLS startup, so do the same.
1268 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1269 TCP connections (such as for Spamd) unless the daemon successfully set
1270 Fast Open mode on its listening sockets. This fixes breakage seen on
1271 too-old kernels or those not configured for Fast Open, at the cost of
1272 requiring both directions being enabled for TFO, and TFO never being used
1273 by non-daemon-related Exim processes.
1275 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1276 endings, at least on the first header line. Try to canonify any that get
1277 past that check, despite the cost.
1279 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1280 now limited to an arbitrary five deep, while parsing addresses with the
1281 strip_excess_angle_brackets option enabled.
1283 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1284 instead leave the unprompted TLS handshake in socket buffer for the
1285 TLS library to consume.
1287 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1289 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1291 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1292 region in one operation, for speed, and this leaves assigned pointers
1293 dangling. Add checks run only under the testsuite which checks all
1294 variables at a store-reset and panics on a dangling pointer; add code
1295 explicitly nulling out all the variables discovered. Fixes one known
1296 bug: a transport crash, where a dangling pointer for $sending_ip_address
1297 originally assigned in a verify callout, is re-used.
1299 PP/06 Drop '.' from @INC in various Perl scripts.
1301 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1303 PP/08 Reduce a number of compilation warnings under clang; building with
1304 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1305 should be warning-free.
1307 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1309 HS/01 Fix portability problems introduced by PP/08 for platforms where
1310 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1312 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1313 chunk. This allows us to accept broken chunked messages. We need a more
1314 general solution here.
1316 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1317 already-broken messages in the queue.
1319 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1321 JH/19 Fix reference counting bug in routing-generated-address tracking.
1327 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1328 supports it and a size is available (ie. the sending peer gave us one).
1330 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1331 years of being deprecated). The replacements are the ACLs
1332 acl_smtp_mime and acl_not_smtp_mime.
1334 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1335 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1336 or even an in-clear connection were permitted. Now, if the host lookup
1337 was dnssec and dane was requested then the host is only used if the
1338 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1339 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1340 if one fails this test.
1341 This means that a poorly-configured remote DNS will make it incommunicado;
1342 but it protects against a DNS-interception attack on it.
1344 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1345 non-noisy when a race steals the message being considered.
1347 JH/05 If main configuration option tls_certificate is unset, generate a
1348 self-signed certificate for inbound TLS connections.
1350 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1351 in rewrites and routers.
1353 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1354 and logged a warning sing 4.83; now they are a configuration file error.
1356 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1357 (lacking @domain). Apply the same qualification processing as RCPT.
1359 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1361 JH/10 Support ${sha256:} applied to a string (as well as the previous
1364 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1365 a cutthrough deliver is pending, as we always want to make a connection.
1366 This also avoids re-routing the message when later placing the cutthrough
1367 connection after a verify cache hit.
1368 Do not update it with the verify result either.
1370 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1371 when routing results in more than one destination address.
1373 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1374 signing (which inhibits the cutthrough capability). Previously only
1375 the presence of an option was tested; now an expansion evaluating as
1376 empty is permissible (obviously it should depend only on data available
1377 when the cutthrough connection is made).
1379 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1380 the relevant preceding SMTP command did not note the pipelining mode.
1382 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1383 Previously they were not counted.
1385 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1386 as one having no matching records. Previously we deferred the message
1387 that needed the lookup.
1389 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1390 distinguished as "(=".
1392 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1393 for missing MX records. Previously it only worked for missing A records.
1395 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1397 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1398 after the data-go-ahead and data-ack. Patch from Jason Betts.
1400 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1401 even for a "none" policy. Patch from Tony Meyer.
1403 JH/22 Fix continued use of a connection for further deliveries. If a port was
1404 specified by a router, it must also match for the delivery to be
1407 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1408 When one of the recipients of a message was unsuitable for the connection
1409 (has no matching addresses), we lost track of needing to mark it
1410 deferred. As a result mail would be lost.
1412 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1414 JH/25 Decoding ACL controls is now done using a binary search; the source code
1415 takes up less space and should be simpler to maintain. Merge the ACL
1416 condition decode tables also, with similar effect.
1418 JH/26 Fix problem with one_time used on a redirect router which returned the
1419 parent address unchanged. A retry would see the parent address marked as
1420 delivered, so not attempt the (identical) child. As a result mail would
1423 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1424 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1425 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1428 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1429 Main config options check_{log,spool}_{inodes,space} are now
1430 100 inodes, 10MB unless set otherwise in the configuration.
1432 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1433 Previously it only applied to the main-section connection policy
1436 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1438 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1439 by me. Added RFC7919 DH primes as an alternative.
1441 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1442 are not in the system include path.
1444 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1445 GnuTLS, when a session startup failed (eg because the client disconnected)
1446 Exim did stdio operations after fclose. This was exposed by a recent
1447 change which nulled out the file handle after the fclose.
1449 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1450 signed directly by the cert-signing cert, rather than an intermediate
1451 OCSP-signing cert. This is the model used by LetsEncrypt.
1453 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1455 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1456 an incoming connection.
1458 HS/02 Bug 1802: Do not half-close the connection after sending a request
1461 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1462 fallback to "prime256v1".
1464 JH/34 SECURITY: Use proper copy of DATA command in error message.
1465 Could leak key material. Remotely exploitable. CVE-2016-9963.
1471 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1472 and 3.4.4 - once the server is enabled to respond to an OCSP request
1473 it does even when not requested, resulting in a stapling non-aware
1474 client dropping the TLS connection.
1476 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1477 support variable-length bit vectors. No functional change.
1479 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1480 The I= interface field on outgoing lines is now after the H= remote
1481 host field, same as incoming lines. There is a separate
1482 outgoing_interface log selector which allows you to disable the
1485 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1486 If not running log_selector +smtp_connection the mainlog would be held
1487 open indefinitely after a "too many connections" event, including to a
1488 deleted file after a log rotate. Leave the per net connection logging
1489 leaving it open for efficiency as that will be quickly detected by the
1490 check on the next write.
1492 HS/01 Bug 1671: Fix post transport crash.
1493 Processing the wait-<transport> messages could crash the delivery
1494 process if the message IDs didn't exist for some reason. When
1495 using 'split_spool_directory=yes' the construction of the spool
1496 file name failed already, exposing the same netto behaviour.
1498 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1499 mime_regex ACL conditions.
1501 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1502 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1503 to HELO, local diagnostic string.
1505 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1506 log line to debug. Even when configured with a tls authenticator many
1507 client connections are expected to not authenticate in this way, so
1508 an authenticate fail is not an error.
1510 HS/02 Add the Exim version string to the process info. This way exiwhat
1511 gives some more detail about the running daemon.
1513 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1514 matter for fast-change records such as DNSBLs.
1516 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1517 retry record, even if constant. There may be multiple transports with
1518 different interface settings and the retry behaviour needs to be kept
1521 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1523 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1525 JH/10 Bug 840: fix log_defer_output option of pipe transport
1527 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1528 hosts_randomize. This matters a lot when combined with mua_wrapper.
1530 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1531 ${quote_pgsql:<string>} operator.
1533 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1535 JH/14 Change header file name for freeradius-client. Relevant if compiling
1536 with Radius support; from the Gentoo tree and checked under Fedora.
1538 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1540 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1541 option transport_filter, meaning no filtering.
1543 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1545 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1546 defaults to "*" (all hosts). The variable is now available when not built
1547 with TLS, default unset, mainly to enable keeping the testsuite sane.
1548 If a server certificate is not supplied (via tls_certificate) an error is
1549 logged, and clients will find TLS connections fail on startup. Presumably
1550 they will retry in-clear.
1551 Packagers of Exim are strongly encouraged to create a server certificate
1552 at installation time.
1554 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1555 with the $config_file variable.
1557 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1558 in transport context, after the attempt, and per-recipient. The latter type
1559 is per host attempted. The event data is the error message, and the errno
1560 information encodes the lookup type (A vs. MX) used for the (first) host,
1561 and the trailing two digits of the smtp 4xx response.
1563 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1564 to write to mainlog (or rejectlog, paniclog) in the window between file
1565 creation and permissions/ownership being changed. Particularly affects
1566 installations where exicyclog is run as root, rather than exim user;
1567 result is that the running daemon panics and dies.
1569 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1571 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1572 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1573 "pri" and "weight". Note that the previous implicit priority given by the
1574 list order is no longer honoured.
1576 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1577 for DKIM processing.
1579 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1580 by defining SUPPORT_SOCKS.
1582 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1583 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1584 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1585 variables are renamed to proxy_{local,external}_{address,port}.
1587 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1588 for a build by defining SUPPORT_I18N
1590 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1591 of the query string, and make ${quote_redis:} do that quoting.
1593 JH/29 Move Events support from Experimental to mainline, enabled by default
1594 and removable for a build by defining DISABLE_EVENT.
1596 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1598 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1599 cached by the daemon.
1601 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1602 by defining LOOKUP_REDIS. The libhiredis library is required.
1604 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1605 keys are given for lookup.
1607 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1608 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1609 only supported when built with TLS support. The PolarSSL SHA routines
1610 are still used when the TLS library is too old for convenient support.
1612 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1613 openssl_options), for security. OpenSSL forces this from version 1.1.0
1614 server-side so match that on older versions.
1616 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1617 allocation for $value could be released as the expansion processing
1618 concluded, but leaving the global pointer active for it.
1620 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1621 and to use the domains and local_parts ACL conditions.
1623 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1624 incorrectly not doubled on cutthrough transmission, hence seen as a
1625 body-termination at the receiving system - resulting in truncated mails.
1626 Commonly the sender saw a TCP-level error, and retransmitted the message
1627 via the normal store-and-forward channel. This could result in duplicates
1628 received - but deduplicating mailstores were liable to retain only the
1629 initial truncated version.
1631 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1633 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1635 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1636 we're in there, support oversigning also; bug 1309.
1638 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1640 HS/04 Add support for keep_environment and add_environment options.
1642 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1643 either intentional arithmetic overflow during PRNG, or testing config-
1646 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1647 delivery resulted in actual delivery. Cancel cutthrough before DATA
1650 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1651 rejects a recipient: pass the reject to the originator.
1653 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1654 Many were false-positives and ignorable, but it's worth fixing the
1657 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1658 for the new environment-manipulation done at startup. Move the routines
1659 from being local to tls.c to being global via the os.c file.
1661 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1662 an extract embedded as result-arg for a map, the first arg for extract
1663 is unavailable so we cannot tell if this is a numbered or keyed
1664 extraction. Accept either.
1670 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1673 JH/02 The smtp transport option "multi_domain" is now expanded.
1675 JH/03 The smtp transport now requests PRDR by default, if the server offers
1678 JH/04 Certificate name checking on server certificates, when exim is a client,
1679 is now done by default. The transport option tls_verify_cert_hostnames
1680 can be used to disable this per-host. The build option
1681 EXPERIMENTAL_CERTNAMES is withdrawn.
1683 JH/05 The value of the tls_verify_certificates smtp transport and main options
1684 default to the word "system" to access the system default CA bundle.
1685 For GnuTLS, only version 3.0.20 or later.
1687 JH/06 Verification of the server certificate for a TLS connection is now tried
1688 (but not required) by default. The verification status is now logged by
1689 default, for both outbound TLS and client-certificate supplying inbound
1692 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1695 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1696 Status Notification (bounce) messages are now MIME format per RFC 3464.
1697 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1698 under the control of the dsn_advertise_hosts option, and routers may
1699 have a dsn_lasthop option.
1701 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1702 default, modifiable by a malware= option. The list separator for
1703 the options can now be changed in the usual way. Bug 68.
1705 JH/10 The smtp_receive_timeout main option is now expanded before use.
1707 JH/11 The incoming_interface log option now also enables logging of the
1708 local interface on delivery outgoing connections.
1710 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1711 if the interface and destination host and port all match.
1713 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1716 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1717 Patch from Andrew Lewis.
1719 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1720 now supports optional time-restrictions, weighting, and priority
1721 modifiers per server. Patch originally by <rommer@active.by>.
1723 JH/16 The spamd_address main option now supports a mixed list of local
1724 and remote servers. Remote servers can be IPv6 addresses, and
1725 specify a port-range.
1727 JH/17 Bug 68: The spamd_address main option now supports an optional
1728 timeout value per server.
1730 JH/18 Bug 1581: Router and transport options headers_add/remove can
1731 now have the list separator specified.
1733 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1736 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1739 JH/21 Support for the A6 type of dns record is withdrawn.
1741 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1742 rather than the verbs used.
1744 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1745 from 255 to 1024 chars.
1747 JH/24 Verification callouts now attempt to use TLS by default.
1749 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1750 are generic router options now. The defaults didn't change.
1752 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1753 Original patch from Alexander Shikoff, worked over by JH.
1755 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1756 files if ZCAT_COMMAND is not executable.
1758 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1760 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1762 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1763 Normally benign, it bites when the pair was led to by a CNAME;
1764 modern usage is to not canonicalize the domain to a CNAME target
1765 (and we were inconsistent anyway for A-only vs AAAA+A).
1767 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1769 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1770 when evaluating $sender_host_dnssec.
1772 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1773 $sender_helo_dnssec variable.
1775 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1777 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1779 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1781 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1782 documented as working, but never had. Support all but $spam_report.
1784 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1785 added for tls authenticator.
1787 HS/03 Add perl_taintmode main config option
1793 TL/01 When running the test suite, the README says that variables such as
1794 no_msglog_check are global and can be placed anywhere in a specific
1795 test's script, however it was observed that placement needed to be near
1796 the beginning for it to behave that way. Changed the runtest perl
1797 script to read through the entire script once to detect and set these
1798 variables, reset to the beginning of the script, and then run through
1799 the script parsing/test process like normal.
1801 TL/02 The BSD's have an arc4random API. One of the functions to induce
1802 adding randomness was arc4random_stir(), but it has been removed in
1803 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1804 function when detected.
1806 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1807 cause callback expansion.
1809 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1810 syntax errors in an expansion can be treated as a string instead of
1811 logging or causing an error, due to the internal use of bool_lax
1812 instead of bool when processing it.
1814 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1815 server certificates when making smtp deliveries.
1817 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1819 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1821 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1823 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1824 Merged patch from Sebastian Wiedenroth.
1826 JH/05 Fix results-pipe from transport process. Several recipients, combined
1827 with certificate use, exposed issues where response data items split
1828 over buffer boundaries were not parsed properly. This eventually
1829 resulted in duplicates being sent. This issue only became common enough
1830 to notice due to the introduction of connection certificate information,
1831 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1833 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1834 size buffer was used, resulting in syntax errors when an expansion
1837 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1838 version 3.3.6 or later.
1840 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1841 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1842 both become "event_action", the variables become $event_name, $event_data
1843 and $event_defer_errno. There is a new variable $verify_mode, usable in
1844 routers, transports and related events. The tls:cert event is now also
1845 raised for inbound connections, if the main configuration event_action
1848 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1849 early OCSP support, but no stapling (appears to be less than 1.0.0).
1851 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1852 server certificate names available under the smtp transport option
1853 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1856 JH/10 Time-related extraction expansions from certificates now use the main
1857 option "timezone" setting for output formatting, and are consistent
1858 between OpenSSL and GnuTLS compilations. Bug 1541.
1860 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1861 encoded parameter in the incoming message. Bug 1558.
1863 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1864 include certificate info, eximon was claiming there were spoolfile
1867 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1869 JH/14 Log delivery-related information more consistently, using the sequence
1870 "H=<name> [<ip>]" wherever possible.
1872 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1873 are problematic for Debian distribution, omit them from the release
1876 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1878 JH/16 Fix string representation of time values on 64bit time_t architectures.
1881 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1882 output list separator was used.
1887 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1888 checkers that were complaining about end of non-void function with no
1891 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1892 This was a regression introduced in 4.83 by another bugfix.
1894 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1896 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1897 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1903 TF/01 Correctly close the server side of TLS when forking for delivery.
1905 When a message was received over SMTP with TLS, Exim failed to clear up
1906 the incoming connection properly after forking off the child process to
1907 deliver the message. In some situations the subsequent outgoing
1908 delivery connection happened to have the same fd number as the incoming
1909 connection previously had. Exim would try to use TLS and fail, logging
1910 a "Bad file descriptor" error.
1912 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1913 utilities have not been installed.
1915 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1916 temporary space as the ACL may create new global variables.
1918 TL/01 LDAP support uses per connection or global context settings, depending
1919 upon the detected version of the libraries at build time.
1921 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1922 to extract and use the src ip:port in logging and expansions as if it
1923 were a direct connection from the outside internet. PPv2 support was
1924 updated based on HAProxy spec change in May 2014.
1926 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1928 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1929 Properly escape header and check for NULL return.
1931 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1934 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1936 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1937 characters in header names, implemented as a verify condition.
1938 Contributed by Michael Fischer v. Mollard.
1940 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1941 results permerror and temperror. Previous values are deprecated but
1942 still accepted. In a future release, err_perm and err_temp will be
1943 completely removed, which will be a backward incompatibility if the
1944 ACL tests for either of these two old results. Patch contributed by
1945 user bes-internal on the mailing list.
1947 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1949 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1950 selectors, in both main and reject logs.
1952 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1955 JH/07 Add malware type "sock" for talking to simple daemon.
1957 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1959 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1960 routers/transports under cutthrough routing.
1962 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1963 numbers. Touch up "bool" conditional to keep the same definition.
1965 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1967 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1969 JH/12 Expand items in router/transport headers_add or headers_remove lists
1970 individually rather than the list as a whole. Bug 1452.
1972 Required for reasonable handling of multiple headers_ options when
1973 they may be empty; requires that headers_remove items with embedded
1974 colons must have them doubled (or the list-separator changed).
1976 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1977 view the policy declared in the DMARC record. Currently, $dmarc_status
1978 is a combined value of both the record presence and the result of the
1981 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1983 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1984 dnslookup router and the smtp transport (applying to the forward
1987 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1988 of ldap servers used for a specific lookup. Patch provided by Heiko
1991 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1992 New variable $lookup_dnssec_authenticated for observability.
1994 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1995 Patch submitted by Lars Timman.
1997 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1999 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2000 Requires trusted mode and valid format message id, aborts otherwise.
2001 Patch contributed by Heiko Schlichting.
2003 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2004 certextract with support for various fields. Bug 1358.
2006 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2007 is requested by default, modifiable by smtp transport option
2010 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2011 operate on certificate variables to give certificate fingerprints
2012 Also new ${sha256:cert_variable}.
2014 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2016 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2017 Christian Aistleitner.
2019 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2021 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2022 file. Patch from Wolfgang Breyha.
2024 JH/25 Expand the coverage of the delivery $host and $host_address to
2025 client authenticators run in verify callout. Bug 1476.
2027 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2028 align with daemon_smtp_ports. Bug 72.
2030 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2031 support and error reporting did not work properly.
2033 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2034 and is readable. Patch from Andrew Colin Kissa.
2036 TL/14 Enhance documentation of ${run expansion and how it parses the
2037 commandline after expansion, particularly in the case when an
2038 unquoted variable expansion results in an empty value.
2040 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2042 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2043 by renaming away from it. Addresses GH issue 15, reported by
2046 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2048 TL/15 SECURITY: prevent double expansion in math comparison functions
2049 (can expand unsanitized data). Not remotely exploitable.
2056 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2058 PP/02 Make -n do something, by making it not do something.
2059 When combined with -bP, the name of an option is not output.
2061 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2064 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2065 $sender_host_name and config options to manage this, and basic check
2068 PP/05 DSCP support for outbound connections and control modifier for inbound.
2070 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2071 (Only plugin which currently uses this is kerberos4, which nobody should
2072 be using, but we should make it available and other future plugins might
2073 conceivably use it, even though it would break NAT; stuff *should* be
2074 using channel bindings instead).
2076 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2077 name; added for Sendmail compatibility; requires admin caller.
2078 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2079 just ignore it); requires trusted caller.
2080 Also parse but ignore: -Ac -Am -X<logfile>
2083 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2085 TL/02 Add +smtp_confirmation as a default logging option.
2087 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2088 Patch by Magnus Holmgren from 2007-02-20.
2090 TL/04 Bugzilla 1281 - Spec typo.
2091 Bugzilla 1283 - Spec typo.
2092 Bugzilla 1290 - Spec grammar fixes.
2094 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2096 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2098 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2099 mailing list by by Dmitry Isaikin.
2101 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2103 JH/02 Support "G" suffix to numbers in ${if comparisons.
2105 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2107 NM/01 Bugzilla 1197 - Spec typo
2108 Bugzilla 1196 - Spec examples corrections
2110 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2112 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2113 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2116 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2117 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2119 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2120 "acl {{name}{arg}...}", and optional args on acl condition
2123 JH/05 Permit multiple router/transport headers_add/remove lines.
2125 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2127 JH/07 Avoid using a waiting database for a single-message-only transport.
2128 Performance patch from Paul Fisher. Bugzilla 1262.
2130 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2133 JH/09 Add $headers_added variable, with content from use of ACL modifier
2134 add_header (but not yet added to the message). Bugzilla 199.
2136 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2137 Pulled from Bugzilla 817 by Wolfgang Breyha.
2139 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2141 (nb: this is the same fix as in Exim 4.80.1)
2143 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2146 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2149 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2151 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2152 advertise SMTP AUTH mechanism to us, instead of a generic
2153 protocol violation error. Also, make Exim more robust to bad
2154 data from the Dovecot auth socket.
2156 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2158 When a queue runner is handling a message, Exim first routes the
2159 recipient addresses, during which it prunes them based on the retry
2160 hints database. After that it attempts to deliver the message to
2161 any remaining recipients. It then updates the hints database using
2164 So if a recipient address works intermittently, it can get repeatedly
2165 deferred at routing time. The retry hints record remains fresh so the
2166 address never reaches the final cutoff time.
2168 This is a fairly common occurrence when a user is bumping up against
2169 their storage quota. Exim had some logic in its local delivery code
2170 to deal with this. However it did not apply to per-recipient defers
2171 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2173 This change adds a proper retry rule check during routing so that the
2174 final cutoff time is checked against the message's age. We only do
2175 this check if there is an address retry record and there is not a
2176 domain retry record; this implies that previous attempts to handle
2177 the address had the retry_use_local_parts option turned on. We use
2178 this as an approximation for the destination being like a local
2179 delivery, as in LMTP.
2181 I suspect this new check makes the old local delivery cutoff check
2182 redundant, but I have not verified this so I left the code in place.
2184 TF/02 Correct gecos expansion when From: is a prefix of the username.
2186 Test 0254 submits a message to Exim with the header
2190 When I ran the test suite under the user fanf2, Exim expanded
2191 the header to contain my full name, whereas it should have added
2192 a Resent-Sender: header. It erroneously treats any prefix of the
2193 username as equal to the username.
2195 This change corrects that bug.
2197 GF/01 DCC debug and logging tidyup
2198 Error conditions log to paniclog rather than rejectlog.
2199 Debug lines prefixed by "DCC: " to remove any ambiguity.
2201 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2203 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2204 Bug spotted by Jeremy Harris; was flawed since initial commit.
2205 Would have resulted in OCSP responses post-SNI triggering an Exim
2206 NULL dereference and crash.
2208 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2210 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2211 Bug detection, analysis and fix by Samuel Thibault.
2212 Bugzilla 1331, Debian bug #698092.
2214 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2216 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2217 Server implementation by Todd Lyons, client by JH.
2218 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2219 config variable "prdr_enable" controls whether the server
2220 advertises the facility. If the client requests PRDR a new
2221 acl_data_smtp_prdr ACL is called once for each recipient, after
2222 the body content is received and before the acl_smtp_data ACL.
2223 The client is controlled by both of: a hosts_try_prdr option
2224 on the smtp transport, and the server advertisement.
2225 Default client logging of deliveries and rejections involving
2226 PRDR are flagged with the string "PRDR".
2228 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2229 fclose(). Diagnosis by Todd Lyons.
2231 PP/17 Update configure.default to handle IPv6 localhost better.
2232 Patch by Alain Williams (plus minor tweaks).
2235 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2236 This is now consistent with GnuTLS, and is now documented: the
2237 previous undocumented portable approach to treating the option as
2238 unset was to force an expansion failure. That still works, and
2239 an empty string is now equivalent.
2241 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2242 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2243 not performing validation itself.
2245 PP/20 Added force_command boolean option to pipe transport.
2246 Patch from Nick Koston, of cPanel Inc.
2248 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2251 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2253 PP/21 Fix eximon continuous updating with timestamped log-files.
2254 Broken in a format-string cleanup in 4.80, missed when I repaired the
2255 other false fix of the same issue.
2256 Report and fix from Heiko Schlichting.
2259 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2260 Report from Prashanth Katuri.
2262 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2263 It's SecureTransport, so affects any MacOS clients which use the
2264 system-integrated TLS libraries, including email clients.
2266 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2267 using a MIME ACL for non-SMTP local injection.
2268 Report and assistance in diagnosis by Warren Baker.
2270 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2272 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2274 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2275 last id that failed so it may be referenced in subsequent ACL's.
2277 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2280 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2281 ldap library initialization, allowing self-signed CA's to be
2282 used. Also properly sets require_cert option later in code by
2283 using NULL (global ldap config) instead of ldap handle (per
2284 session). Bug diagnosis and testing by alxgomz.
2286 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2287 the src/util/ subdirectory.
2289 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2290 renamed to Transport Post Delivery Action by Jeremy Harris, as
2293 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2294 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2295 redis_servers = needs to be configured which will be used by the redis
2296 lookup. Patch from Warren Baker, of The Packet Hub.
2298 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2300 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2301 hostname or reverse DNS when processing a host list. Used suggestions
2302 from multiple comments on this bug.
2304 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2306 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2307 Missed a few lines, added it to make the runtest require no keyboard
2310 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2311 contains upper case chars. Make router use caseful_local_part.
2313 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2314 support when GnuTLS has been built with p11-kit.
2320 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2322 This, or similar/improved, will also be change PP/11 of 4.82.
2328 PP/01 Handle short writes when writing local log-files.
2329 In practice, only affects FreeBSD (8 onwards).
2330 Bugzilla 1053, with thanks to Dmitry Isaikin.
2332 NM/01 Bugzilla 949 - Documentation tweak
2334 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2337 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2339 PP/02 Implemented gsasl authenticator.
2341 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2343 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2344 `pkg-config foo` for cflags/libs.
2346 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2347 with rest of GSASL and with heimdal_gssapi.
2349 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2350 `pkg-config foo` for cflags/libs for the TLS implementation.
2352 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2353 properties get this fed in as external SSF. A number of robustness
2354 and debugging improvements to the cyrus_sasl authenticator.
2356 PP/08 cyrus_sasl server now expands the server_realm option.
2358 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2359 Patch by Jeremy Harris.
2361 PP/10 Added dbmjz lookup type.
2363 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2365 PP/12 MAIL args handles TAB as well as SP, for better interop with
2366 non-compliant senders.
2367 Analysis and variant patch by Todd Lyons.
2369 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2370 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2371 Patch from Dirk Mueller <dmueller@suse.com>
2373 PP/13 tls_peerdn now print-escaped for spool files.
2374 Observed some $tls_peerdn in wild which contained \n, which resulted
2375 in spool file corruption.
2377 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2378 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2379 or write after TLS renegotiation, which otherwise led to messages
2382 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2383 as a tracking header (ie: a signed header comes before the signature).
2384 Patch from Wolfgang Breyha.
2386 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2387 comma-sep list; embedded commas doubled.
2389 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2391 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2393 Report and patch from Dmitry Banschikov.
2395 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2396 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2397 failures. We appear to now support TLS1.1+ with Exim.
2399 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2400 lets Exim select keys and certificates based upon TLS SNI from client.
2401 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2402 before an outbound SMTP session. New log_selector, +tls_sni.
2404 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2405 NULL dereference. Report and patch from Alun Jones.
2407 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2408 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2409 Not seeing resolver debug output on NetBSD, but suspect this is a
2410 resolver implementation change.
2412 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2413 Left warnings. Added "eximon gdb" invocation mode.
2415 PP/21 Defaulting "accept_8bitmime" to true, not false.
2417 PP/22 Added -bw for inetd wait mode support.
2419 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2420 locate the relevant includes and libraries. Made this the default.
2422 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2423 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2425 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2426 This may cause build issues on older platforms.
2428 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2429 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2430 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2431 Added SNI support via GnuTLS too.
2432 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2434 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2436 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2437 Applied second patch from Janne, implementing suggestion to default
2438 multiple-strings-in-record handling to match SPF spec.
2440 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2442 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2443 read-only, out of scope).
2444 Patch from Wolfgang Breyha, report from Stuart Northfield.
2446 PP/29 Fix three issues highlighted by clang analyser static analysis.
2447 Only crash-plausible issue would require the Cambridge-specific
2448 iplookup router and a misconfiguration.
2449 Report from Marcin Mirosław.
2451 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2453 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2454 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2455 As part of this, removing so much warning spew let me fix some minor
2456 real issues in debug logging.
2458 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2459 assignment on my part. Fixed.
2461 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2462 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2463 Janne Snabb (who went above and beyond: thank you).
2465 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2466 string otherwise requires a connection and a bunch more work and it's
2467 relatively easy to get wrong. Should also expose TLS library linkage
2470 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2471 64-bit ${eval} (JH/03).
2473 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2474 GNU libc to support some of the 64-bit stuff, should not lead to
2475 conflicts. Defined before os.h is pulled in, so if a given platform
2476 needs to override this, it can.
2478 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2479 protection layer was required, which is not implemented.
2480 Bugzilla 1254, patch from Wolfgang Breyha.
2482 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2483 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2484 tls_dhparam take prime identifiers. Also unbreak combination of
2485 OpenSSL+DH_params+TLSSNI.
2487 PP/39 Disable SSLv2 by default in OpenSSL support.
2493 PP/01 Solaris build fix for Oracle's LDAP libraries.
2494 Bugzilla 1109, patch from Stephen Usher.
2496 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2498 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2501 TF/02 Fix a couple more cases where we did not log the error message
2502 when unlink() failed. See also change 4.74-TF/03.
2504 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2505 lock up or crash if it happened to be inside a call to libc when it
2506 got a SIGUSR1 from exiwhat.
2508 The SIGUSR1 handler appends the current process status to the process
2509 log which is later printed by exiwhat. It used to use the general
2510 purpose logging code to do this, but several functions it calls are
2511 not safe for signals.
2513 The new output code in the SIGUSR1 handler is specific to the process
2514 log, and simple enough that it's easy to inspect for signal safety.
2515 Removing some special cases also simplifies the general logging code.
2516 Removing the spurious timestamps from the process log simplifies
2519 TF/04 Improved ratelimit ACL condition.
2521 The /noupdate option has been deprecated in favour of /readonly which
2522 has clearer semantics. The /leaky, /strict, and /readonly update modes
2523 are mutually exclusive. The update mode is no longer included in the
2524 database key; it just determines when the database is updated. (This
2525 means that when you upgrade Exim will forget old rate measurements.)
2527 Exim now checks that the per_* options are used with an update mode that
2528 makes sense for the current ACL. For example, when Exim is processing a
2529 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2530 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2531 must specify per_mail/readonly. If you omit the update mode it defaults to
2532 /leaky where that makes sense (as before) or /readonly where required.
2534 The /noupdate option is now undocumented but still supported for
2535 backwards compatibility. It is equivalent to /readonly except that in
2536 ACLs where /readonly is required you may specify /leaky/noupdate or
2537 /strict/noupdate which are treated the same as /readonly.
2539 A useful new feature is the /count= option. This is a generalization
2540 of the per_byte option, so that you can measure the throughput of other
2541 aggregate values. For example, the per_byte option is now equivalent
2542 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2544 The per_rcpt option has been generalized using the /count= mechanism
2545 (though it's more complicated than the per_byte equivalence). When it is
2546 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2547 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2548 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2549 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2550 Note that using per_rcpt with a non-readonly update mode in more than
2551 one ACL will cause the recipients to be double-counted. (The per_mail
2552 and per_byte options don't have this problem.)
2554 The handling of very low rates has changed slightly. If the computed rate
2555 is less than the event's count (usually one) then this event is the first
2556 after a long gap. In this case the rate is set to the same as this event's
2557 count, so that the first message of a spam run is counted properly.
2559 The major new feature is a mechanism for counting the rate of unique
2560 events. The new per_addr option counts the number of different
2561 recipients that someone has sent messages to in the last time period. It
2562 behaves like per_rcpt if all the recipient addresses are different, but
2563 duplicate recipient addresses do not increase the measured rate. Like
2564 the /count= option this is a general mechanism, so the per_addr option
2565 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2566 example, measure the rate that a client uses different sender addresses
2567 with the options per_mail/unique=$sender_address. There are further
2568 details in the main documentation.
2570 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2572 TF/06 Removed a few PCRE remnants.
2574 TF/07 Automatically extract Exim's version number from tags in the git
2575 repository when doing development or release builds.
2577 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2578 Bugzilla 879. Patch from Paul Fisher.
2580 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2581 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2584 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2586 PP/05 Variable $av_failed, true if the AV scanner deferred.
2587 Bugzilla 1078. Patch from John Horne.
2589 PP/06 Stop make process more reliably on build failure.
2590 Bugzilla 1087. Patch from Heiko Schlittermann.
2592 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2593 Bugzilla 1089. Patch from Heiko Schlittermann.
2595 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2596 Bugzilla 1131. Patch from Holger Weiß.
2598 PP/09 Handle IPv6 addresses with SPF.
2599 Bugzilla 860. Patch from Wolfgang Breyha.
2601 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2603 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2606 PP/11 match_* no longer expand right-hand-side by default.
2607 New compile-time build option, EXPAND_LISTMATCH_RHS.
2608 New expansion conditions, "inlist", "inlisti".
2610 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2612 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2614 PP/14 fix log_write() format string regression from TF/03.
2615 Bugzilla 1152. Patch from Dmitry Isaikin.
2621 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2623 PP/02 Harmonised TLS library version reporting; only show if debugging.
2624 Layout now matches that introduced for other libraries in 4.74 PP/03.
2626 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2628 PP/04 New "dns_use_edns0" global option.
2630 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2633 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2634 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2636 TK/01 Updated PolarSSL code to 0.14.2.
2637 Bugzilla 1097. Patch from Andreas Metzler.
2639 PP/07 Catch divide-by-zero in ${eval:...}.
2640 Fixes bugzilla 1102.
2642 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2645 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2646 format-string attack -- SECURITY: remote arbitrary code execution.
2648 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2649 time unintentionally subject to list matching rules, letting the header
2650 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2651 arbitrary string expansion). This allowed for information disclosure.
2653 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2654 INT_MIN/-1 -- value coerced to INT_MAX.
2660 NM/01 Workaround for PCRE version dependency in version reporting
2663 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2664 This fixes portability to compilers other than gcc, notably
2665 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2667 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2668 makefiles for portability to HP-UX and POSIX correctness.
2670 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2671 Also via indented variable definition in the Makefile.
2672 (Debugging by Oliver Heesakkers).
2674 PP/02 Restore caching of spamd results with expanded spamd_address.
2675 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2677 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2678 Improves build reliability. Fix from: Frank Elsner
2680 NM/02 Fix wide character breakage in the rfc2047 coding
2681 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2683 NM/03 Allow underscore in dnslist lookups
2684 Fixes bug 1026. Patch from Graeme Fowler
2686 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2687 Code patches from Adam Ciarcinski of NetBSD.
2689 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2692 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2693 is logged, to avoid truncation. Patch from John Horne.
2695 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2696 Patch from Jakob Hirsch.
2698 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2699 SQL string expansion failure details.
2700 Patch from Andrey Oktyabrski.
2702 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2703 Patch from Simon Arlott.
2705 PP/09 New lookups functionality failed to compile on old gcc which rejects
2706 extern declarations in function scope.
2707 Patch from Oliver Fleischmann
2709 PP/10 Use sig_atomic_t for flags set from signal handlers.
2710 Check getgroups() return and improve debugging.
2711 Fixed developed for diagnosis in bug 927 (which turned out to be
2714 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2715 Patch from Mark Zealey.
2717 PP/12 Bugzilla 1056: Improved spamd server selection.
2718 Patch from Mark Zealey.
2720 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2721 Based on patch from Heiko Schlittermann.
2723 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2724 Patch from Uwe Doering, sign-off by Michael Haardt.
2726 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2727 variable declaration deep within a block. Bug and patch from
2730 PP/15 lookups-Makefile IRIX compatibility coercion.
2732 PP/16 Make DISABLE_DKIM build knob functional.
2734 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2735 Patch by Simon Arlott
2737 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2738 variable argument macros. Our copy now differs from upstream.
2744 TF/01 Failure to get a lock on a hints database can have serious
2745 consequences so log it to the panic log.
2747 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2748 controlled using the smtp_confirmation log selector.
2750 TF/03 Include the error message when we fail to unlink a spool file.
2752 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2753 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2754 for maintaining out-of-tree patches for some time.
2756 PP/01 Bugzilla 139: Documentation and portability issues.
2757 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2758 Handle per-OS dynamic-module compilation flags.
2760 PP/02 Let /dev/null have normal permissions.
2761 The 4.73 fixes were a little too stringent and complained about the
2762 permissions on /dev/null. Exempt it from some checks.
2763 Reported by Andreas M. Kirchwitz.
2765 PP/03 Report version information for many libraries, including
2766 Exim version information for dynamically loaded libraries. Created
2767 version.h, now support a version extension string for distributors
2768 who patch heavily. Dynamic module ABI change.
2770 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2771 privilege escalation vulnerability whereby the Exim run-time user
2772 can cause root to append content of the attacker's choosing to
2775 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2778 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2779 If dropping privileges for untrusted macros, we disabled normal logging
2780 on the basis that it would fail; for the Exim run-time user, this is not
2781 the case, and it resulted in successful deliveries going unlogged.
2782 Fixed. Reported by Andreas Metzler.
2788 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2789 only prepend for the Resent-* case. Fixes regression introduced in
2790 Exim 4.70 by NM/22 for Bugzilla 607.
2792 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2793 increasing numbers of administrators be bitten by this.
2795 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2797 PP/03 Bugzilla 994: added openssl_options main configuration option.
2799 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2801 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2803 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2805 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2806 without a peer certificate, leading to a segfault because of an
2807 assumption that peers always have certificates. Be a little more
2808 paranoid. Problem reported by Martin Tscholak.
2810 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2811 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2812 NB: ClamAV planning to remove STREAM in "middle of 2010".
2813 CL also introduces -bmalware, various -d+acl logging additions and
2814 more caution in buffer sizes.
2816 PP/09 Implemented reverse_ip expansion operator.
2818 PP/10 Bugzilla 937: provide a "debug" ACL control.
2820 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2822 PP/12 Bugzilla 973: Implement --version.
2824 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2826 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2828 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2830 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2831 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2832 ignore trailing whitespace.
2834 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2836 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2839 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2840 Notification from Dr Andrew Aitchison.
2842 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2843 ExtendedDetectionInfo response format.
2844 Notification from John Horne.
2846 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2849 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2850 XSL and documented dependency on system catalogs, with examples of how
2853 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2856 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2857 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2858 configuration file which is writeable by the Exim user or group.
2860 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2861 of configuration files to cover files specified with the -C option if
2862 they are going to be used with root privileges, not just the default
2865 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2866 option (effectively making it always true).
2868 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2869 files to be used while preserving root privileges.
2871 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2872 that rogue child processes cannot use them.
2874 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2875 run-time user, instead of root.
2877 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2878 Exim run-time user without dropping privileges.
2880 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2881 result string, instead of calling string_vformat() twice with the same
2884 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2885 for other users. Others should always drop root privileges if they use
2886 -C on the command line, even for a whitelisted configure file.
2888 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2890 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2896 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2897 $data_path, and $header_path variables; fixed documentation bugs and
2900 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2901 exipick to access non-standard spools, including the "frozen" queue
2904 NM/01 Bugzilla 965: Support mysql stored procedures.
2905 Patch from Alain Williams
2907 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2909 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2910 Patch from Andreas Metzler
2912 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2913 Patch from Kirill Miazine
2915 NM/05 Bugzilla 671: Added umask to procmail example.
2917 JJ/03 installed exipick 20100323.0, fixing doc bug
2919 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2920 directory. Notification and patch from Dan Rosenberg.
2922 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2924 TK/02 Improve log output when DKIM signing operation fails.
2926 MH/01 Treat the transport option dkim_domain as a colon separated
2927 list, not as a single string, and sign the message with each element,
2928 omitting multiple occurences of the same signer.
2930 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2931 Bugzilla 985, 986. Patch by Simon Arlott
2933 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2934 Patch by Simon Arlott
2936 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2937 MBX locking. Notification from Dan Rosenberg.
2943 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2945 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2947 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2949 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2951 NM/04 Bugzilla 915: Flag broken perl installation during build.
2957 TK/01 Added patch by Johannes Berg that expands the main option
2958 "spamd_address" if it starts with a dollar sign.
2960 TK/02 Write list of recipients to X-Envelope-Sender header when building
2961 the mbox-format spool file for content scanning (suggested by Jakob
2964 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2965 (http://www.dcc-servers.net/) support via dccifd. Activated by
2966 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2968 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2969 by Mark Daniel Reidel <mr@df.eu>.
2971 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2972 When building exim an external PCRE library is now needed -
2973 PCRE is a system library on the majority of modern systems.
2974 See entry on PCRE_LIBS in EDITME file.
2976 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2977 conversation. Added nologin parameter to request.
2978 Patch contributed by Kirill Miazine.
2980 TF/01 Do not log submission mode rewrites if they do not change the address.
2982 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2984 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2985 log files in place. Contributed by Roberto Lima.
2987 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2989 TF/03 Bugzilla 615: When checking the local_parts router precondition
2990 after a local_part_suffix or local_part_prefix option, Exim now
2991 does not use the address's named list lookup cache, since this
2992 contains cached lookups for the whole local part.
2994 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2995 Robert Millan. Documentation is in experimental-spec.txt.
2997 TF/04 Bugzilla 668: Fix parallel build (make -j).
2999 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3001 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3002 Patch provided by Jan Srzednicki.
3004 TF/05 Leading white space used to be stripped from $spam_report which
3005 wrecked the formatting. Now it is preserved.
3007 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3008 that they are available at delivery time.
3010 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3012 TF/08 TLS error reporting now respects the incoming_interface and
3013 incoming_port log selectors.
3015 TF/09 Produce a more useful error message if an SMTP transport's hosts
3016 setting expands to an empty string.
3018 NM/06 Bugzilla 744: EXPN did not work under TLS.
3019 Patch provided by Phil Pennock.
3021 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3022 Patch provided by Richard Godbee.
3024 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3025 acl_smtp_notquit, added index entry.
3027 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3028 Patch provided by Eugene Bujak.
3030 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3031 accept(). Patch provided by Maxim Dounin.
3033 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3034 Patch provided by Phil Pennock.
3036 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3038 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3039 Patch provided by Brad "anomie" Jorsch.
3041 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3042 Patch provided by Dean Brooks.
3044 TK/05 Add native DKIM support (does not depend on external libraries).
3046 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3047 Patch provided by Graeme Fowler.
3049 NM/16 Bugzilla 851: Documentation example syntax fix.
3051 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3053 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3056 NM/19 Bugzilla 745: TLS version reporting.
3057 Patch provided by Phil Pennock.
3059 NM/20 Bugzilla 167: bool: condition support.
3060 Patch provided by Phil Pennock.
3062 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3063 clients. Patch provided by Phil Pennock.
3065 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3066 Patch provided by Brad "anomie" Jorsch.
3068 NM/23 Bugzilla 687: Fix misparses in eximstats.
3069 Patch provided by Heiko Schlittermann.
3071 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3072 Patch provided by Heiko Schlittermann.
3074 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3075 plus update to original patch.
3077 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3079 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3080 Patch provided by David Brownlee.
3082 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3084 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3086 NM/30 Bugzilla 888: TLS documentation bugfixes.
3088 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3090 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3091 Unlike the original bugzilla I have changed all shell scripts in src tree.
3093 NM/33 Bugzilla 898: Transport filter timeout fix.
3094 Patch by Todd Rinaldo.
3096 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3097 Patch by Serge Demonchaux.
3099 NM/35 Bugzilla 39: Base64 decode bug fixes.
3100 Patch by Jakob Hirsch.
3102 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3104 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3106 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3108 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3114 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3115 ALT-N's libdkim that I have put here:
3116 http://duncanthrax.net/exim-experimental/
3118 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3119 were called 'true' and it seems that C99 defines that as a reserved
3120 keyword to be used with 'bool' variable types. That means you could
3121 not include C99-style headers which use bools without triggering
3122 build errors in sieve.c.
3124 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3125 as mailq or other aliases. Changed the --help handling significantly
3126 to do whats expected. exim_usage() emits usage/help information.
3128 SC/01 Added the -bylocaldomain option to eximstats.
3130 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3132 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3134 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3140 PH/01 Another patch from the Sieve maintainer.
3142 PH/02 When an IPv6 address is converted to a string for single-key lookup
3143 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3144 dots are used instead of colons so that keys in lsearch files need not
3145 contain colons. This was done some time before quoting was made available
3146 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3147 (notated using the quote facility) so as to distinguish them from IPv4
3148 keys. This meant that lookups for IP addresses in host lists did not work
3149 for iplsearch lookups.
3151 This has been fixed by arranging for IPv6 addresses to be expressed with
3152 colons if the lookup type is iplsearch. This is not incompatible, because
3153 previously such lookups could never work.
3155 The situation is now rather anomalous, since one *can* have colons in
3156 ordinary lsearch keys. However, making the change in all cases is
3157 incompatible and would probably break a number of configurations.
3159 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3162 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3163 conversion specification without a maximum field width, thereby enabling
3164 a rogue spamd server to cause a buffer overflow. While nobody in their
3165 right mind would setup Exim to query an untrusted spamd server, an
3166 attacker that gains access to a server running spamd could potentially
3167 exploit this vulnerability to run arbitrary code as the Exim user.
3169 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3170 $primary_hostname instead of what libspf2 thinks the hosts name is.
3172 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3173 a directory entry by the name of the lookup key. Previously, if a
3174 symlink pointed to a non-existing file or a file in a directory that
3175 Exim lacked permissions to read, a lookup for a key matching that
3176 symlink would fail. Now it is enough that a matching directory entry
3177 exists, symlink or not. (Bugzilla 503.)
3179 PH/03 The body_linecount and body_zerocount variables are now exported in the
3182 PH/04 Added the $dnslist_matched variable.
3184 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3185 This means they are set thereafter only if the connection becomes
3188 PH/06 Added the client_condition to authenticators so that some can be skipped
3189 by clients under certain conditions.
3191 PH/07 The error message for a badly-placed control=no_multiline_responses left
3192 "_responses" off the end of the name.
3194 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3196 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3197 (without spaces) instead of just copying the configuration text.
3199 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3201 PH/11 Added $max_received_linelength.
3203 PH/12 Added +ignore_defer and +include_defer to host lists.
3205 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3206 way in which PCRE > 7.0 is built.
3208 PH/14 Implemented queue_only_load_latch.
3210 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3211 MAIL command. The effect was to mangle the value on 64-bit systems.
3213 PH/16 Another patch from the Sieve maintainer.
3215 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3217 PH/18 If a system quota error occurred while trying to create the file for
3218 a maildir delivery, the message "Mailbox is full" was not appended to the
3219 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3220 only to a quota excession during the actual writing of the file.
3222 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3223 characters?) which causes problems in log lines. The DN values are now
3224 passed through string_printing() before being added to log lines.
3226 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3227 and InterBase are left for another time.)
3229 PH/21 Added message_body_newlines option.
3231 PH/22 Guard against possible overflow in moan_check_errorcopy().
3233 PH/23 POSIX allows open() to be a macro; guard against that.
3235 PH/24 If the recipient of an error message contained an @ in the local part
3236 (suitably quoted, of course), incorrect values were put in $domain and
3237 $local_part during the evaluation of errors_copy.
3243 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3244 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3247 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3248 issue a MAIL command.
3250 PH/02 In an ACL statement such as
3252 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3254 if a client was not listed at all, or was listed with a value other than
3255 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3256 the condition was not true (as it should be), so access was not denied.
3257 The bug was that the ! inversion was incorrectly passed on to the second
3258 item. This has been fixed.
3260 PH/03 Added additional dnslists conditions == and =& which are different from
3261 = and & when the dns lookup returns more than one IP address.
3263 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3264 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3266 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3267 FSYNC, which compiles an option called disable_fsync that allows for
3268 bypassing fsync(). The documentation is heavily laced with warnings.
3270 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3272 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3273 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3274 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3275 including adding "make clean"; (3) Added -fPIC when compiling the test
3276 dynamically loaded module, to get rid of a warning.
3278 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3279 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3280 = 0s. The bug is otherwise harmless.
3282 PH/07 There was a bug in the dovecot authenticator such that the value of
3283 $auth1 could be overwritten, and so not correctly preserved, after a
3284 successful authentication. This usually meant that the value preserved by
3285 the server_setid option was incorrect.
3287 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3289 PH/09 Installed PCRE release 7.0.
3291 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3292 run for batched SMTP input. It is now run at the start of every message
3293 in the batch. While fixing this I discovered that the process information
3294 (output by running exiwhat) was not always getting set for -bs and -bS
3295 input. This is fixed, and it now also says "batched" for BSMTP.
3297 PH/11 Added control=no_pipelining.
3299 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3300 patch, slightly modified), and move the expansion of helo_data till after
3301 the connection is made in the smtp transport (so it can use these
3304 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3306 PH/14 Added log_selector = +pid.
3308 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3310 PH/16 Add ${if forany and ${if forall.
3312 PH/17 Added dsn_from option to vary the From: line in DSNs.
3314 PH/18 Flush SMTP output before performing a callout, unless control =
3315 no_callout_flush is set.
3317 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3318 was true (the default) a successful delivery failed to delete the retry
3319 item, thus causing premature timeout of the address. The bug is now
3322 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3324 PH/21 Long custom messages for fakedefer and fakereject are now split up
3325 into multiline responses in the same way that messages for "deny" and
3326 other ACL rejections are.
3328 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3329 with slight modification.
3331 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3332 draft, changing the syntax and factoring some duplicate code".
3334 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3335 for deliveries of the second and subsequent messages over the same SMTP
3338 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3339 ${reduce, with only minor "tidies".
3341 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3343 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3344 expansion side effects.
3346 PH/27 When a message times out after an over-quota error from an Exim-imposed
3347 quota, the bounce message says "mailbox is full". This message was not
3348 being given when it was a system quota that was exceeded. It now should
3351 MH/03 Made $recipients available in local_scan(). local_scan() already has
3352 better access to the recipient list through recipients_list[], but
3353 $recipients can be useful in postmaster-provided expansion strings.
3355 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3356 in the case of a MAIL command with additional options following the
3357 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3358 were accidentally chopped off.
3360 PH/29 SMTP synchronization checks are implemented when a command is read -
3361 there is a check that no more input is waiting when there shouldn't be
3362 any. However, for some commands, a delay in an ACL can mean that it is
3363 some time before the response is written. In this time, more input might
3364 arrive, invalidly. So now there are extra checks after an ACL has run for
3365 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3366 pipelining has not been advertised.
3368 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3370 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3371 returned in the SMTP response when smtp_return_error_details was false.
3372 This has been fixed.
3374 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3375 instead of the C I/O that was originally supplied, because problems were
3376 reported on Solaris.
3378 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3379 Exim which did not show up earlier: it was assuming that a call to
3380 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3381 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3382 was a macro that became an assignment, so it seemed to work. This has
3383 changed to a proper function call with a void return, hence the compile
3384 error. Exim's code has been fixed.
3386 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3389 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3391 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3393 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3394 because it turns out to be too big or there is a timeout) there is no
3395 "Completed" line in the log. When some messages of this type were
3396 selected by exigrep, they were listed as "not completed". Others were
3397 picked up by some special patterns. I have improved the selection
3398 criteria to be more general.
3400 PH/38 The host_find_failed option in the manualroute router can now be set
3401 to "ignore", to completely ignore a host whose IP address cannot be
3402 found. If all hosts are ignored, the behaviour is controlled by the new
3403 host_all_ignored option.
3405 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3406 homing or because of multiple MX records with /mx) generated more than
3407 one IP address, and the following item turned out to be the local host,
3408 all the secondary addresses of the first item were incorrectly removed
3409 from the list, along with the local host and any following hosts (which
3410 is what is supposed to happen).
3412 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3413 whoever called Exim into the -H file. In the case of the daemon it was
3414 behaving confusingly. When first started, it used values for whoever
3415 started the daemon, but after a SIGHUP it used the Exim user (because it
3416 calls itself on a restart). I have changed the code so that it now always
3419 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3420 message are rejected with the same error (e.g. no authentication or bad
3421 sender address), and a DATA command is nevertheless sent (as can happen
3422 with PIPELINING or a stupid MUA), the error message that was given to the
3423 RCPT commands is included in the rejection of the DATA command. This is
3424 intended to be helpful for MUAs that show only the final error to their
3427 PH/42 Another patch from the Sieve maintainer.
3429 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3430 Eximstats - Fixed some broken HTML links and added missing column headers
3432 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3433 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3435 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3437 PH/43 Yet another patch from the Sieve maintainer.
3439 PH/44 I found a way to check for a TCP/IP connection going away before sending
3440 the response to the final '.' that terminates a message, but only in the
3441 case where the client has not sent further data following the '.'
3442 (unfortunately, this is allowed). However, in many cases there won't be
3443 any further data because there won't be any more messages to send. A call
3444 to select() can be used: if it shows that the input is "ready", there is
3445 either input waiting, or the socket has been closed. An attempt to read
3446 the next input character can distinguish the two cases. Previously, Exim
3447 would have sent an OK response which the client would never have see.
3448 This could lead to message repetition. This fix should cure that, at
3449 least in a lot of common cases.
3451 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3452 advertised in response to EHLO.
3458 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3459 fixed by 4.65/MH/01 (is this a record?) are fixed:
3461 (i) An empty string was always treated as zero by the numeric comparison
3462 operators. This behaviour has been restored.
3464 (ii) It is documented that the numeric comparison operators always treat
3465 their arguments as decimal numbers. This was broken in that numbers
3466 starting with 0 were being interpreted as octal.
3468 While fixing these problems I realized that there was another issue that
3469 hadn't been noticed. Values of message_size_limit (both the global option
3470 and the transport option) were treated as octal if they started with 0.
3471 The documentation was vague. These values are now always treated as
3472 decimal, and I will make that clear in the documentation.
3478 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3479 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3482 MH/01 Don't check that the operands of numeric comparison operators are
3483 integers when their expansion is in "skipping" mode (fixes bug
3484 introduced by 4.64-PH/07).
3486 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3487 child addresses, Exim now panics and dies. Previously, because the count
3488 is held in a short int, deliveries were likely to be lost. As such a
3489 large number of recipients for a single message is ridiculous
3490 (performance will be very, very poor), I have chosen to impose a limit
3491 rather than extend the field.
3497 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3498 leftover -K file (the existence of which was triggered by #402).
3499 While we were at it, introduced process PID as part of the -K
3500 filename. This should rule out race conditions when creating
3503 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3504 processing considerably. Previous code took too long for large mails,
3505 triggering a timeout which in turn triggers #401.
3507 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3508 in the DK code in transports.c. sendfile() is not really portable,
3509 hence the _LINUX specificness.
3511 TF/01 In the add_headers option to the mail command in an Exim filter,
3512 there was a bug that Exim would claim a syntax error in any
3513 header after the first one which had an odd number of characters
3516 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3517 callout verification, Exim cached a "reject" for the entire domain. This
3518 is correct for most verifications, but it is not correct for a recipient
3519 verification with use_sender or use_postmaster set, because in that case
3520 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3521 case of MAIL FROM:<> rejection from other early rejections (e.g.
3522 rejection of HELO). When verifying a recipient using a non-null MAIL
3523 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3524 Whatever the result of the callout, the value of the domain cache is
3525 left unchanged (for any other kind of callout, getting as far as trying
3526 RCPT means that the domain itself is ok).
3528 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3531 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3532 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3533 session, the daemon ignores ECONNECT errors and logs others; it now
3534 ignores EPIPE as well.
3536 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3537 (quoted-printable decoding).
3539 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3540 later the small subsequent patch to fix an introduced bug.
3542 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3544 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3546 PH/08 An error is now given if message_size_limit is specified negative.
3548 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3549 to be given (somewhat) arbitrary names.
3551 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3554 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3555 miscellaneous code fixes
3557 PH/10 Added the log_reject_target ACL modifier to specify where to log
3560 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3561 hostname. This is wrong, because it relates to the incoming message (and
3562 probably the interface on which it is arriving) and not to the outgoing
3563 callout (which could be using a different interface). This has been
3564 changed to use the value of the helo_data option from the smtp transport
3565 instead - this is what is used when a message is actually being sent. If
3566 there is no remote transport (possible with a router that sets up host
3567 addresses), $smtp_active_hostname is used.
3569 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3570 tweaks were necessary in order to get it to work (see also 21 below):
3571 (a) The code assumed that strncpy() returns a negative number on buffer
3572 overflow, which isn't the case. Replaced with Exim's string_format()
3574 (b) There were several signed/unsigned issues. I just did the minimum
3575 hacking in of casts. There is scope for a larger refactoring.
3576 (c) The code used strcasecmp() which is not a standard C function.
3577 Replaced with Exim's strcmpic() function.
3578 (d) The code set only $1; it now sets $auth1 as well.
3579 (e) A simple test gave the error "authentication client didn't specify
3580 service in request". It would seem that Dovecot has changed its
3581 interface. Fortunately there's a specification; I followed it and
3582 changed what the client sends and it appears to be working now.
3584 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3587 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3588 address A is aliased to B and C, where B exists and C does not. Without
3589 -v the output is "A verified" because verification stops after a
3590 successful redirection if more than one address is generated. However,
3591 with -v the child addresses are also verified. Exim was outputting "A
3592 failed to verify" and then showing the successful verification for C,
3593 with its parentage. It now outputs "B failed to verify", showing B's
3594 parentage before showing the successful verification of C.
3596 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3597 look up a TXT record in a specific list after matching in a combined
3600 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3601 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3602 they consult the DNS. I had assumed they would set it the way they
3603 wanted; and indeed my experiments on Linux seem to show that in some
3604 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3605 To be on the safe side, however, I have now made the interface to
3606 host_find_byname() similar to host_find_bydns(), with an argument
3607 containing the DNS resolver options. The host_find_byname() function now
3608 sets these options at its start, just as host_find_bydns() does. The smtp
3609 transport options dns_qualify_single and dns_search_parents are passed to
3610 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3611 of host_find_byname() use the default settings of RES_DEFNAMES
3612 (qualify_single) but not RES_DNSRCH (search_parents).
3614 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3615 spool_read_header() do less string testing, by means of a preliminary
3616 switch on the second character of optional "-foo" lines. (This is
3617 overdue, caused by the large number of possibilities that now exist.
3618 Originally there were few.) While I was there, I also converted the
3619 str(n)cmp tests so they don't re-test the leading "-" and the first
3620 character, in the hope this might squeeze out yet more improvement.
3622 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3623 flag allowing group syntax was set by the header_syntax check but not
3624 turned off, possible causing trouble later; (2) The flag was not being
3625 set at all for the header_verify test, causing "group"-style headers to
3626 be rejected. I have now set it in this case, and also caused header_
3627 verify to ignore an empty address taken from a group. While doing this, I
3628 came across some other cases where the code for allowing group syntax
3629 while scanning a header line wasn't quite right (mostly, not resetting
3630 the flag correctly in the right place). These bugs could have caused
3631 trouble for malformed header lines. I hope it is now all correct.
3633 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3634 with the "reply" argument non-NULL. The code, however (which originally
3635 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3636 but it didn't always do it. This confused somebody who was copying the
3637 code for some other use. I have removed all the tests.
3639 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3640 feature that was used to support insecure browsers during the U.S. crypto
3641 embargo. It requires special client support, and Exim is probably the
3642 only MTA that supported it -- and would never use it because real RSA is
3643 always available. This code has been removed, because it had the bad
3644 effect of slowing Exim down by computing (never used) parameters for the
3645 RSA_EXPORT functionality.
3647 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3648 authenticator to fail if there's a tab character in the incoming data
3649 (there should never be unless someone is messing about, as it's supposed
3650 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3651 if the connection is using TLS or if the remote IP is the same as the
3652 local IP, and the "valid-client-cert option" if a client certificate has
3655 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3656 authenticators. This can be used for authorization after authentication
3657 succeeds. (In the case of plaintext, it servers for both authentication
3660 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3661 if any retry times were supplied.
3663 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3664 connection, where there is no client IP address to check. In this
3665 situation, the verify now always succeeds.
3667 PH/25 Applied John Jetmore's -Mset patch.
3669 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3671 PH/27 In a string expansion for a processed (not raw) header when multiple
3672 headers of the same name were present, leading whitespace was being
3673 removed from all of them, but trailing whitespace was being removed only
3674 from the last one. Now trailing whitespace is removed from each header
3675 before concatenation. Completely empty headers in a concatenation (as
3676 before) are ignored.
3678 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3679 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3681 PH/29 [Removed. This was a change that I later backed out, and forgot to
3682 correct the ChangeLog entry (that I had efficiently created) before
3683 committing the later change.]
3685 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3686 address errors (4xx response to RCPT) over the same connection as other
3687 messages routed to the same hosts. Such deliveries are always "forced",
3688 so retry times are not inspected. This resulted in far too many retries
3689 for the affected addresses. The effect occurred only when there were more
3690 hosts than the hosts_max_try setting in the smtp transport when it had
3691 the 4xx errors. Those hosts that it had tried were not added to the list
3692 of hosts for which the message was waiting, so if all were tried, there
3693 was no problem. Two fixes have been applied:
3695 (i) If there are any address or message errors in an SMTP delivery, none
3696 of the hosts (tried or untried) are now added to the list of hosts
3697 for which the message is waiting, so the message should not be a
3698 candidate for sending over the same connection that was used for a
3699 successful delivery of some other message. This seems entirely
3700 reasonable: after all the message is NOT "waiting for some host".
3701 This is so "obvious" that I'm not sure why it wasn't done
3702 previously. Hope I haven't missed anything, but it can't do any
3703 harm, as the worst effect is to miss an optimization.
3705 (ii) If, despite (i), such a delivery is accidentally attempted, the
3706 routing retry time is respected, so at least it doesn't keep
3707 hammering the server.
3709 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3710 in ${readsocket because some servers need this prod.
3712 PH/32 Added some extra debug output when updating a wait-xxx database.
3714 PH/33 The hint "could be header name not terminated by colon", which has been
3715 given for certain expansion errors for a long time, was not being given
3716 for the ${if def:h_colon_omitted{... case.
3718 PH/34 The spec says: "With one important exception, whenever a domain list is
3719 being scanned, $domain contains the subject domain." There was at least
3720 one case where this was not true.
3722 PH/35 The error "getsockname() failed: connection reset by peer" was being
3723 written to the panic log as well as the main log, but it isn't really
3724 panic-worthy as it just means the connection died rather early on. I have
3725 removed the panic log writing for the ECONNRESET error when getsockname()
3728 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3729 runs only) independently of the message's sender address. This meant
3730 that, if the 4xx error was in fact related to the sender, a different
3731 message to the same recipient with a different sender could confuse
3732 things. In particular, this can happen when sending to a greylisting
3733 server, but other circumstances could also provoke similar problems.
3734 I have changed the default so that the retry time for these errors is now
3735 based a combination of the sender and recipient addresses. This change
3736 can be overridden by setting address_retry_include_sender=false in the
3739 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3740 remote server are returned as part of bounce messages. This was not
3741 happening for LMTP over a pipe (the lmtp transport), but now it is the
3742 same for both kinds of LMTP.
3744 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3745 in header lines that were in fact CNAMEs. This is no longer the case.
3747 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3748 and queue runs started by the daemon processed all messages. This has
3749 been fixed so that -R and -S can now usefully be given with -q<time>.
3751 PH/40 Import PCRE release 6.7 (fixes some bugs).
3753 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3755 PH/42 Give an error if -q is specified more than once.
3757 PH/43 Renamed the variables $interface_address and $interface_port as
3758 $received_ip_address and $received_port, to make it clear that these
3759 values apply to message reception, and not to the outgoing interface when
3760 a message is delivered. (The old names remain recognized, of course.)
3762 PH/44 There was no timeout on the connect() call when using a Unix domain
3763 socket in the ${readsocket expansion. There now is.
3765 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3766 be meaningful with "accept".
3768 SC/01 Eximstats V1.43
3769 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3771 SC/02 Eximstats V1.44
3772 Use a glob alias rather than an array ref in the generated
3773 parser. This improves both readability and performance.
3775 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3776 Collect SpamAssassin and rejection statistics.
3777 Don't display local sender or destination tables unless
3778 there is data to show.
3779 Added average volumes into the top table text output.
3781 SC/04 Eximstats V1.46
3782 Collect data on the number of addresses (recipients)
3783 as well as the number of messages.
3785 SC/05 Eximstats V1.47
3786 Added 'Message too big' to the list of mail rejection
3787 reasons (thanks to Marco Gaiarin).
3789 SC/06 Eximstats V1.48
3790 Mainlog lines which have GMT offsets and are too short to
3791 have a flag are now skipped.
3793 SC/07 Eximstats V1.49 (Alain Williams)
3794 Added the -emptyok flag.
3796 SC/08 Eximstats V1.50
3797 Fixes for obtaining the IP address from reject messages.
3799 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3800 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3801 whitespace changes from 4.64-PH/27
3803 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3806 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3807 are found, allow negative numbers in numeric criteria)
3809 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3811 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3812 to match changes made in 4.64-PH/43
3814 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3816 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3817 "domain" is actually an IP address, and force a failure. This locks out
3818 those revolvers/nameservers that support "A-for-A" lookups, in
3819 contravention of the specifications.
3821 PH/48 When a host name was looked up from an IP address, and the subsequent
3822 forward lookup of the name timed out, the host name was left in
3823 $sender_host_name, contrary to the specification.
3825 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3826 restricted to single-key lookups, Exim was not diagnosing an error if
3827 * or *@ was used with a query-style lookup.
3829 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3831 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3832 long ago, but noone interested enough thought of it. Let's just say that
3833 the "1.1" means that there are some new functions that weren't there at
3834 some point in the past.
3836 PH/51 Error processing for expansion failure of helo_data from an smtp
3837 transport during callout processing was broken.
3839 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3840 tested/used via the -bh/-bhc/-bs options.
3842 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3843 bug, fixed in subsequent PCRE releases).
3845 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3846 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3848 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3854 SC/01 Use a glob alias rather than an array ref in eximstats generated
3855 parser. This improves both readability and performance.
3857 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3858 Don't display local sender or destination tables in eximstats unless
3859 there is data to show.
3860 Added average volumes into the eximstats top table text output.
3862 SC/03 Collect data on the number of addresses (recipients) as well
3863 as the number of messages in eximstats.
3865 TF/01 Correct an error in the documentation for the redirect router. Exim
3866 does (usually) call initgroups() when daemonizing.
3868 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3869 with consistent privilege compared to when running as a daemon.
3871 TF/03 Note in the spec that $authenticated_id is not set for local
3872 submissions from trusted users.
3874 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3875 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3877 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3878 by adding some example configuration directives to the default
3879 configuration file. A little bit of work is required to uncomment the
3880 directives and define how usernames and passwords are checked, but
3881 there is now a framework to start from.
3883 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3884 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3885 without this. I don't know how relevant this is to other LDAP libraries.
3887 PH/02 Add the verb name to the "unknown ACL verb" error.
3889 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3891 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3893 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3894 directory not expanded when it should be if an expanded home directory
3895 was set for the address (which is overridden by the transport).
3897 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3900 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3901 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3902 because it is too late at that time, and has no effect.
3904 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3905 security issue with \' (bugzilla #107). I could not use the
3906 PQescapeStringConn() function, because it needs a PGconn value as one of
3909 PH/08 When testing addresses using -bt, indicate those final addresses that
3910 are duplicates that would not cause an additional delivery. At least one
3911 person was confused, thinking that -bt output corresponded to deliveries.
3912 (Suppressing duplicates isn't a good idea as you lose the information
3913 about possibly different redirections that led to the duplicates.)
3915 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3916 systems where poll() doesn't work, in particular OS X.
3918 PH/10 Added more information to debugging output for retry time not reached.
3920 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3921 operations in malware.c.
3923 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3926 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3927 syslog_duplication set false, log lines that would normally be written
3928 both the the main log and to the reject log were not written to syslog at
3931 PH/14 In the default configuration, change the use of "message" in ACL warn
3932 statements to "add_header".
3934 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3935 not followed by a command (e.g. "seen endif").
3937 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3938 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3941 PH/17 Added extra conditions to the default value of delay_warning_condition
3945 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3946 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3947 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3950 The Auto-Submitted: and various List- headers are standardised, whereas I
3951 don't think Precedence: ever was.
3953 PH/18 Refactored debugging code in route_finduser() to show more information,
3954 in particular, the error code if getpwnam() issues one.
3956 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3957 This is apparently needed in addition to the PH/07 change above to avoid
3958 any possible encoding problems.
3960 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3961 but not after initializing Perl.
3963 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3964 output them only if debugging. By default they are written stderr,
3965 apparently, which is not desirable.
3967 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3970 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3973 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3975 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3976 authenticated or an ident call has been made. Suppress the default
3977 values for $authenticated_id and $authenticated_sender (but permit -oMai
3978 and -oMas) when testing with -bh.
3980 PH/24 Re-jigged the order of the tests in the default configuration so that the
3981 tests for valid domains and recipients precede the DNS black list and CSA
3982 tests, on the grounds that those ones are more expensive.
3984 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3985 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3986 This bug exists in every version of Exim that I still have, right back to
3989 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3990 However, an attempt to turn on case-sensitivity in a regex key by
3991 including (?-i) didn't work because the subject string was already
3992 lowercased, and the effects were non-intuitive. It turns out that a
3993 one-line patch can be used to allow (?-i) to work as expected.
3999 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4000 other effects) broke the use of negated acl sub-conditions.
4002 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4005 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4006 "Deny" causes Exim to reject the incoming connection with a 554 error.
4007 Unfortunately, if there is a major crisis, such as a disk failure,
4008 tcp-wrappers gives "deny", whereas what one would like would be some
4009 kind of temporary error. A kludge has been added to help with this.
4010 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4011 554 error is used if errno is still zero or contains ENOENT (which occurs
4012 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4015 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4017 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4018 errors. Otherwise a message that provokes a temporary error (when other
4019 messages do not) can cause a whole host to time out.
4021 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4022 addresses were routed directly to files or pipes from a redirect router.
4023 File deliveries just didn't batch; pipe deliveries might have suffered
4026 PH/06 A failure to get a lock for a hints database would erroneously always say
4027 "Failed to get write lock", even when it was really a read lock.
4029 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4030 of 0600. This has been changed to use the value of the lockfile_mode
4031 option (which defaults to 0600).
4033 PH/08 Applied small patch from the Sieve maintainer.
4035 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4036 folder from quota calculations, a direct delivery into this folder messed
4037 up the contents of the maildirsize file. This was because the regex was
4038 used only to exclude .Trash (or whatever) when the size of the mailbox
4039 was calculated. There was no check that a delivery was happening into an
4040 excluded directory. This bug has been fixed by ignoring all quota
4041 processing for deliveries into excluded directories.
4043 PH/10 Added the maildirfolder_create_regex option to appendfile.
4049 PH/01 The code for finding all the local interface addresses on a FreeBSD
4050 system running IPv6 was broken. This may well have applied to all BSD
4051 systems, as well as to others that have similar system calls. The broken
4052 code found IPv4 interfaces correctly, but gave incorrect values for the
4053 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4054 that it would not match correctly against @[] and not recognize the IPv6
4057 PH/02 The ipliteral router was not recognizing addresses of the form user@
4058 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4060 PH/03 Added disable_ipv6.
4062 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4063 decoded form, because it is most often used to construct To: headers
4064 lines in autoreplies, and the decoded form may well be syntactically
4065 invalid. However, $reply_address has leading white space removed, and all
4066 newlines turned into spaces so that the autoreply transport does not
4069 PH/05 If group was specified without a user on a router, and no group or user
4070 was specified on a transport, the group from the router was ignored.
4072 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4073 for visible compile-time settings that can be used to change these
4074 numbers, for those that want even more. Backwards compatibility with old
4075 spool files has been maintained. However, going back to a previous Exim
4076 release will lost any variables that are in spool files.
4078 PH/07 Two small changes when running in the test harness: increase delay when
4079 passing a TCP/IP connection to a new process, in case the original
4080 process has to generate a bounce, and remove special handling of
4081 127.0.0.2 (sic), which is no longer necessary.
4083 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4084 be the same on different OS.
4086 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4089 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4090 whether --show-vars was specified or not
4092 JJ/02 exipick: Added support for new ACL variable spool format introduced
4095 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4096 syntactically invalid From: or Reply-to: line, and a filter used this to
4097 generate an autoreply, and therefore failed to obtain an address for the
4098 autoreply, Exim could try to deliver to a non-existent relative file
4099 name, causing unrelated and misleading errors. What now happens is that
4100 it logs this as a hard delivery error, but does not attempt to create a
4103 PH/11 The exinext utility has a -C option for testing purposes, but although
4104 the given file was scanned by exinext itself; it wasn't being passed on
4105 when Exim was called.
4107 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4108 an end-of-file indication when reading a command response.
4110 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4111 compiled. In many other places in Exim, IPv6 addresses are always
4112 recognized, so I have changed this. It also means that IPv4 domain
4113 literals of the form [IPV4:n.n.n.n] are now always recognized.
4115 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4116 used if the router is not running as root, for example, when verifying at
4117 ACL time, or when using -bh. The debugging output from this situation was
4118 non-existent - all you got was a failure to exec. I have made two
4121 (a) Failures to set uid/gid, the current directory, or a process leader
4122 in a subprocess such as that created by queryprogram now generate
4123 suitable debugging output when -d is set.
4125 (b) The queryprogram router detects when it is not running as root,
4126 outputs suitable debugging information if -d is set, and then runs
4127 the subprocess without attempting to change uid/gid.
4129 PH/15 Minor change to Makefile for building test_host (undocumented testing
4132 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4133 additional section of a DNS packet that returns MX or SRV records.
4134 Instead, it always explicitly searches for A/AAAA records. This avoids
4135 major problems that occur when a DNS server includes only records of one
4136 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4137 fixed another bug: if SRV records were looked up and the corresponding
4138 address records were *not* found in the additional section, the port
4139 values from the SRV records were lost.
4141 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4142 using the correct key (the original address) when searching the retry
4143 rules in order to find which one to use for generating the retry hint.
4145 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4146 adding the default one. Similarly, if it contains a Reply-To: header, the
4147 errors_reply_to option, if set, is not used.
4149 PH/19 When calculating a retry time, Exim used to measure the "time since
4150 failure" by looking at the "first failed" field in the retry record. Now
4151 it does not use this if it is later than than the arrival time of the
4152 message. Instead it uses the arrival time. This makes for better
4153 behaviour in cases where some deliveries succeed, thus re-setting the
4154 "first failed" field. An example is a quota failure for a huge message
4155 when small messages continue to be delivered. Without this change, the
4156 "time since failure" will always be short, possible causing more frequent
4157 delivery attempts for the huge message than are intended.
4158 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4160 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4161 $1, $2, $3) because the numerical variables can be reset during some
4162 expansion items (e.g. "match"), thereby losing the authentication data.
4164 PH/21 Make -bV show the size of off_t variables so that the test suite can
4165 decide whether to run tests for quotas > 2G.
4167 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4168 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4169 filecount value is greater than 2G or if a quota value is greater than 2G
4170 on a system where the size of off_t is not greater than 4, a panic error
4173 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4174 never match. The debug and -bh output now contains an explicit error
4175 message indicating a malformed IPv4 address or mask.
4177 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4178 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4179 PH/23 above applies.
4181 PH/25 Do not write to syslog when running in the test harness. The only
4182 occasion when this arises is a failure to open the main or panic logs
4183 (for which there is an explicit test).
4185 PH/26 Added the /no_tell option to "control=freeze".
4187 PH/27 If a host name lookup failed very early in a connection, for example, if
4188 the IP address matched host_lookup and the reverse lookup yielded a name
4189 that did not have a forward lookup, an error message of the form "no IP
4190 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4191 could be logged. Now it outputs the IP address instead of "NULL".
4193 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4194 allows the sender and the authenticated sender to be set when
4195 submitting a message from within Exim. Since child_open_exim() is
4196 documented for local_scan(), the new function should be too.
4198 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4199 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4200 results in an empty string is now treated as unset.
4202 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4204 PH/31 Added sender_verify_fail logging option.
4206 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4207 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4208 tidied the source and removed it altogether.
4210 PH/33 When a queue run was abandoned because the load average was too high, a
4211 log line was always written; now it is written only if the queue_run log
4212 selector is set. In addition, the log line for abandonment now contains
4213 information about the queue run such as the pid. This is always present
4214 in "start" and "stop" lines but was omitted from the "abandon" line.
4216 PH/34 Omit spaces between a header name and the colon in the error message that
4217 is given when verify = headers_syntax fails (if there are lots of them,
4218 the message gets confusing).
4220 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4221 names, as there are now some PTR records that contain slashes. This check
4222 is only to protect against broken name servers that fall over on strange
4223 characters, so the fact that it applies to all lookups doesn't matter.
4225 PH/36 Now that the new test suite is complete, we can remove some of the
4226 special code in Exim that was needed for the old test suite. For example,
4227 sorting DNS records because real resolvers return them in an arbitrary
4228 order. The new test suite's fake resolver always returns records in the
4231 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4232 bounces) except when queue_only is set, to avoid logging races between
4233 the different processes.
4235 PH/38 Panic-die if .include specifies a non-absolute path.
4237 PH/39 A tweak to the "H" retry rule from its user.
4239 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4240 a label. They prevented compilation on older perls.
4242 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4243 a warning to be raised on newish perls.
4245 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4246 on queue. Changes to match documented behaviour of showing count of
4247 messages matching specified criteria.
4249 PH/40 Changed the default ident timeout from 30s to 5s.
4251 PH/41 Added support for the use of login_cap features, on those BSD systems
4252 that have them, for controlling the resources used by pipe deliveries.
4254 PH/42 The content-scanning code uses fopen() to create files in which to put
4255 message data. Previously it was not paying any attention to the mode of
4256 the files. Exim runs with umask(0) because the rest of the code creates
4257 files with open(), and sets the required mode explicitly. Thus, these
4258 files were ending up world-writeable. This was not a big issue, because,
4259 being within the spool directory, they were not world-accessible. I have
4260 created a function called modefopen, which takes an additional mode
4261 argument. It sets umask(777), creates the file, chmods it to the required
4262 mode, then resets the umask. All the relevant calls to fopen() in the
4263 content scanning code have been changed to use this function.
4265 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4266 to 24 hours. This avoids potential overflow problems when processing G
4267 and H retry rules. I suspect nobody ever tinkers with this value.
4269 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4271 PH/45 When the plaintext authenticator is running as a client, the server's
4272 challenges are checked to ensure they are valid base64 strings. By
4273 default, the authentication attempt is cancelled if an invalid string is
4274 received. Setting client_ignore_invalid_base64 true ignores these errors.
4275 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4276 they are received. Thus, the responses can be made to depend on the
4277 challenges. If an invalid string is ignored, an empty string is placed in
4280 PH/46 Messages that are created by the autoreply transport now contains a
4281 References: header, in accordance with RFCs 2822 and 3834.
4283 PH/47 Added authenticated_sender_force to the smtp transport.
4285 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4287 PH/49 Installed latest patch from the Sieve maintainer.
4289 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4290 was also set, the appendfile transport was unnecessarily scanning a
4291 directory of message files (e.g. for maildir delivery) to find the count
4292 of files (along with the size), even though it did not need this
4293 information. It now does the scan only if it needs to find either the
4294 size of the count of files.
4296 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4298 PH/52 Two bugs concerned with error handling when the smtp transport is
4301 (i) Exim was not creating retry information for temporary errors given
4302 for individual recipients after the DATA command when the smtp transport
4303 was used in LMTP mode. This meant that they could be retried too
4304 frequently, and not timed out correctly.
4306 (ii) Exim was setting the flag that allows error details to be returned
4307 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4308 recipients that were returned after the DATA command.
4310 PH/53 This is related to PH/52, but is more general: for any failing address,
4311 when detailed error information was permitted to be returned to the
4312 sender, but the error was temporary, then after the final timeout, only
4313 "retry timeout exceeded" was returned. Now it returns the full error as
4314 well as "retry timeout exceeded".
4316 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4317 do this, and (what is worse) MTAs that accept it.
4319 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4320 will now be deprecated.
4322 PH/56 New os.c-cygwin from the Cygwin maintainer.
4324 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4325 formats (previously only available in exim formats via -bpr, -bpru,
4326 and -bpra. Now also available in native and exiqgrep formats)
4328 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4329 with very large, slow to parse queues
4331 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4333 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4335 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4336 responses to authentication challenges, though it was showing the
4337 challenges; (ii) I've removed the CR characters from the debug output for
4340 PH/58 Allow for the insertion of a newline as well as a space when a string
4341 is turned into more than one encoded-word during RFC 2047 encoding. The
4342 Sieve code now uses this.
4344 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4345 data_4xx, lost_connection, tls_required.
4347 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4348 message was being sent as an SMTP response.
4350 PH/61 Add -l and -k options to exicyclog.
4352 PH/62 When verifying, if an address was redirected to one new address, so that
4353 verification continued, and the new address failed or deferred after
4354 having set something in $address_data, the value of $address_data was not
4355 passed back to the ACL. This was different to the case when no
4356 redirection occurred. The value is now passed back in both cases.
4358 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4359 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4360 use login_cap.h, so on its own it isn't the distinguishing feature. The
4361 new name refers directly to the setclassresources() function.
4363 PH/65 Added configuration files for NetBSD3.
4365 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4367 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4368 is preferred over IPv4.
4370 PH/68 The bounce_return_message and bounce_return_body options were not being
4371 honoured for bounces generated during the reception of non-SMTP messages.
4372 In particular, this applied to messages rejected by the ACL. This bug has
4373 been fixed. However, if bounce_return_message is true and bounce_return_
4374 body is false, the headers that are returned for a non-SMTP message
4375 include only those that have been read before the error was detected.
4376 (In the case of an ACL rejection, they have all been read.)
4378 PH/69 The HTML version of the specification is now built in a directory called
4379 spec_html instead of spec.html, because the latter looks like a path with
4380 a MIME-type, and this confuses some software.
4382 PH/70 Catch two compiler warnings in sieve.c.
4384 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4385 function verify_get_ident() calls ip_connect() to connect a socket, but
4386 if the "connect()" function timed out, ip_connect() used to close the
4387 socket. However, verify_get_ident() also closes the socket later, and in
4388 between Exim writes to the log, which may get opened at this point. When
4389 the socket was closed in ip_connect(), the log could get the same file
4390 descriptor number as the socket. This naturally causes chaos. The fix is
4391 not to close the socket in ip_connect(); the socket should be closed by
4392 the function that creates it. There was only one place in the code where
4393 this was missing, in the iplookup router, which I don't think anybody now
4394 uses, but I've fixed it anyway.
4396 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4397 well as to direct DNS lookups. Otherwise the handling of names in host
4398 lists is inconsistent and therefore confusing.
4404 PH/01 Two changes to the default runtime configuration:
4406 (1) Move the checks for relay_from_hosts and authenticated clients from
4407 after to before the (commented out) DNS black list checks.
4409 (2) Add control=submission to the relay_from_hosts and authenticated
4410 clients checks, on the grounds that messages accepted by these
4411 statements are most likely to be submissions.
4413 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4415 (1) Generate an error if the third argument for the ${prvs expansion is
4418 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4421 (3) Reset the variables that are obtained from the first argument of
4422 ${prvscheck and used in the second argument before leaving the code,
4423 because their memory is reclaimed, so using them afterwards may do
4426 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4427 one (it's much easier than Tom thought :-).
4429 (5) Because of (4), we can now allow for the use of $prvscheck_result
4430 inside the third argument.
4432 PH/03 For some reason, the default setting of PATH when running a command from
4433 a pipe transport was just "/usr/bin". I have changed it to
4436 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4437 anything to be listed in the output from -bV.
4439 PH/05 When a filter generated an autoreply, the entire To: header line was
4440 quoted in the delivery log line, like this:
4442 => >A.N.Other <ano@some.domain> <original@ddress> ...
4444 This has been changed so that it extracts the operative address. There
4445 may be more than one such address. If so, they are comma-separated, like
4448 => >ano@some.domain,ona@other.domain <original@ddress> ...
4450 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4451 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4452 not being looked up in the rDNS to get a host name, Exim was showing the
4453 IP address twice in Received: lines, even though the IP addresses were
4454 identical. For example:
4456 Received: from [1.2.3.4] (helo=[1.2.3.4])
4458 However, if the real host name was known, it was omitting the HELO data
4459 if it matched the actual IP address. This has been tidied up so that it
4460 doesn't show the same IP address twice.
4462 PH/07 When both +timestamp and +memory debugging was on, the value given by
4463 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4464 called by the debug printing, thereby overwriting the timestamp buffer.
4465 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4467 PH/08 When the original message was included in an autoreply transport, it
4468 always said "this is a copy of the message, including all the headers",
4469 even if body_only or headers_only was set. It now gives an appropriate
4472 PH/09 Applied a patch from the Sieve maintainer which:
4474 o fixes some comments
4475 o adds the (disabled) notify extension core
4476 o adds some debug output for the result of if/elsif tests
4477 o points to the current vacation draft in the documentation
4478 and documents the missing references header update
4482 o fixes a bug in processing the envelope test (when testing
4483 multiple envelope elements, the last element determined the
4486 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4487 Electronic Mail") by including:
4489 Auto-submitted: auto-generated
4491 in the messages that it generates (bounce messages and others, such as
4492 warnings). In the case of bounce messages for non-SMTP messages, there was
4493 also a typo: it was using "Auto_submitted" (underscore instead of
4494 hyphen). Since every message generated by Exim is necessarily in response
4495 to another message, thes have all been changed to:
4497 Auto-Submitted: auto-replied
4499 in accordance with these statements in the RFC:
4501 The auto-replied keyword:
4503 - SHOULD be used on messages sent in direct response to another
4504 message by an automatic process,
4506 - MUST NOT be used on manually-generated messages,
4508 - MAY be used on Delivery Status Notifications (DSNs) and Message
4509 Disposition Notifications (MDNs),
4511 - MUST NOT be used on messages generated by automatic or periodic
4512 processes, except for messages which are automatic responses to
4515 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4516 to the default Received: header definition.
4518 PH/12 Added log selector acl_warn_skipped (default on).
4520 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4521 variables because (a) they are in the wrong storage pool and (b) even if
4522 they were copied, it wouldn't work properly because of the caching.
4524 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4525 checking when decoding. Apparently there are clients that generate
4526 overlong encoded strings. Why am I not surprised?
4528 PH/15 If the first argument of "${if match_address" was not empty, but did not
4529 contain an "@" character, Exim crashed. Now it writes a panic log message
4530 and treats the condition as false.
4532 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4534 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4535 extension "envelope-auth". The code is finished and in agreement with
4536 other implementations, but there is no documentation so far and in fact,
4537 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4538 not changing the active code.
4540 Print executed "if" and "elsif" statements when debugging is used. This
4541 helps a great deal to understand what a filter does.
4543 Document more things not specified clearly in RFC3028. I had all this
4544 sorted out, when out of a sudden new issues came to my mind. Oops."
4546 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4549 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4550 canonical form (as documented). However, after a host name lookup from
4551 the IP address, check_host() was doing a simple string comparison with
4552 addresses acquired from the DNS when checking that the found name did
4553 have the original IP as one of its addresses. Since any found IPv6
4554 addresses are likely to be in abbreviated form, the comparison could
4555 fail. Luckily, there already exists a function for doing the comparison
4556 by converting both addresses to binary, so now that is used instead of
4557 the text comparison.
4559 PH/20 There was another similar case to PH/19, when a complete host name was
4560 given in a host list; looking up its IP address could give an abbreviated
4561 form, whereas the current host's name might or might not be abbreviated.
4562 The same fix has been applied.
4568 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4569 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4572 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4573 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4575 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4577 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4578 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4579 Also, for "Auto-Submitted", treat anything other than "no" as
4580 non-personal, in accordance with RFC 3834. (Previously it treated
4581 anything starting "auto-" as non-personal.)
4583 TF/01 The control=submission/name=... option had a problem with syntax
4584 errors if the name included a slash character. The /name= option
4585 now slurps the rest of the string, so it can include any characters
4586 but it must come last in the list of options (after /sender_retain
4589 PH/05 Some modifications to the interface to the fake nameserver for the new
4597 TK/01 Added the "success_on_redirect" address verification option. See
4598 NewStuff for rationale and an example.
4600 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4602 PH/02 Patch to exigrep to allow it to work on syslog lines.
4604 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4605 fread() to skip over the body file's header line, because in Cygwin the
4606 header line is locked and is inaccessible.
4608 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4609 co-exist for some time) to make it clear that it is the Exim ID that is
4610 referenced, not the Message-ID: header line.
4612 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4613 string_format() function, because snprintf() does not exist on all
4616 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4617 ${stat: expansion item.
4619 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4620 protocol synchronization error", to keep the pedants happy.
4622 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4623 well as for IRIX systems, when gcc is being used. See the host.c source
4626 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4628 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4631 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4632 transport and to the smtp transport in LMTP mode.
4634 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4636 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4637 run a filter in a subprocess. This could lead to confusion in subsequent
4638 lookups in the parent process. There should also be a search_tidyup() at
4639 the end of the subprocess.
4641 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4642 only if the host matched helo_try_verify_hosts, which caused the
4643 verification to occur when the EHLO/HELO command was issued. The ACL just
4644 tested the remembered result. Now, if a previous verification attempt has
4645 not happened, "verify = helo" does it there and then.
4647 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4649 TK/03 Fix log output including CR from clamd.
4651 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4652 exist provoked a memory error which could cause a segfault.
4654 PH/15 Installed PCRE 6.2
4656 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4658 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4659 of the problem. Specifically, suggested +O2 rather than +O1 for the
4662 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4664 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4665 record, the port was not correctly logged when the outgoing_port log
4666 selector was set (it logged the transort's default port).
4668 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4669 fallback_hosts, and "hosts" in the smtp transport.
4671 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4672 host errors such as "Connection refused".
4674 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4675 authentication with radiusclient 0.4.9:
4677 - Error returned from rc_read_config was caught wrongly
4678 - Username/password not passed on to radius server due to wrong length.
4680 The presumption is that some radiusclient API changes for 4.51/PH/17
4681 were not taken care of correctly. The code is still untested by me (my
4682 Linux distribution still has 0.3.2 of radiusclient), but it was
4683 contributed by a Radius user.
4685 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4686 expanding the "port" option of the smtp transport.
4688 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4689 while reading a MIME header. Thanks to Tom Hughes for a patch.
4691 PH/24 Include config.h inside local_scan.h so that configuration settings are
4694 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4695 that in an ACL for RCPT (for example), you can examine exactly what was
4698 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4699 commands, but it was not correctly comparing the address with the actual
4700 client host address. Thus, it would show the EHLO address in Received:
4701 header lines when this was not necessary.
4703 PH/27 Added the % operator to ${eval:}.
4705 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4706 it should be ignoring failures (because with -C, for example, it has lost
4707 privilege). It wasn't ignoring creation failures other than "already
4710 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4713 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4714 because an input line was too long, either on its own, or by virtue of
4715 too many continuations, the temporary file was not being removed, and the
4716 return code was incorrect.
4718 PH/31 Missing "BOOL" in function definition in filtertest.c.
4720 PH/32 Applied Sieve patches from the maintainer.
4722 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4724 PH/33 Added "verify = not_blind".
4726 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4727 Local/Makefile (with some defaults set). These are used in built scripts
4728 such as exicyclog, but they have never been used in the exim_install
4729 script (though there are many overriding facilities there). I have
4730 arranged that the exim_install script now takes note of these two
4733 PH/35 Installed configuration files for Dragonfly.
4735 PH/36 When a locally submitted message by a trusted user did not contain a
4736 From: header, and the sender address was obtained from -f or from an SMTP
4737 MAIL command, and the trusted user did not use -F to supply a sender
4738 name, $originator_name was incorrectly used when constructing a From:
4739 header. Furthermore, $originator_name was used for submission mode
4740 messages from external hosts without From: headers in a similar way,
4741 which is clearly wrong.
4743 PH/37 Added control=suppress_local_fixups.
4745 PH/38 When log_selector = +received_sender was set, and the addition of the
4746 sender made the log line's construction buffer exactly full, or one byte
4747 less than full, an overflow happened when the terminating "\n" was
4750 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4751 when the result of a list match is failure because a DNS lookup failed.
4753 PH/40 RM_COMMAND is now used in the building process.
4755 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4756 the "build-* directories that it finds.
4758 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4759 address in a domain literal was a prefix of an interface address.
4761 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4762 when verifying a sender address, unless rewrite_headers is false.
4764 PH/44 Wrote a long comment about why errors_to addresses are verified as
4765 recipients, not senders.
4767 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4768 the ratelimit ACL was added.
4770 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4772 PH/46 Added extra information about PostgreSQL errors to the error string.
4774 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4775 avoiding the need to install special zones in a real server. This is
4776 backwards compatible; if it can't find the fake resolver, it drops back.
4777 Thus, both old and new test suites can be run.
4779 TF/02 Added util/ratelimit.pl
4781 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4782 clock is set back in time.
4784 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4785 Candler <B.Candler@pobox.com>.
4787 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4788 OK for addresses that are the result of redirections.
4790 PH/48 A number of further additions for the benefit of the new test suite,
4791 including a fake gethostbyname() that interfaces to the fake DNS resolver
4794 TF/06 The fix for widen_domains has also been applied to qualify_single and
4795 search_parents which are the other dnslookup options that can cause
4798 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4801 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4803 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4804 service" if it encountered an MX record with an empty target hostname.
4805 The message is now "an MX or SRV record indicated no SMTP service".
4807 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4808 if the DNS of the sending site is misconfigured. This is quite a
4809 common situation. This change restores the behaviour of treating a
4810 helo verification defer as a failure.
4812 PH/51 If self=fail was set on a router, the bounce message did not include the
4813 actual error message.
4819 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4821 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4822 command itself ended in error, the underlying message about the transport
4823 filter timeout was being overwritten with the pipe command error. Now the
4824 underlying error message should be appended to the second error message.
4826 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4828 PH/02 Reduce the amount of output that "make" produces by default. Full output
4829 can still be requested.
4831 PH/03 The warning log line about a condition test deferring for a "warn" verb
4832 was being output only once per connection, rather than after each
4833 occurrence (because it was using the same function as for successful
4834 "warn" verbs). This seems wrong, so I have changed it.
4836 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4837 it should not have, which might have caused a crash in the right
4838 circumstances, but probably never did.
4840 PH/04 Installed a modified version of Tony Finch's patch to make submission
4841 mode fix the return path as well as the Sender: header line, and to
4842 add a /name= option so that you can make the user's friendly name appear
4845 TF/03 Added the control = fakedefer ACL modifier.
4847 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4848 Mark Lowes for thorough testing.
4850 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4852 TK/03 Merged latest SRS patch from Miles Wilton.
4854 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4855 with the definition in sysexits.h (which is #included earlier).
4856 Fortunately, Exim does not actually use EX_OK. The code used to try to
4857 preserve the sysexits.h value, by assuming that macro definitions were
4858 scanned for macro replacements. I have been disabused of this notion,
4859 so now the code just undefines EX_OK before #including unistd.h.
4861 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4862 in the smtp transport. When a block could not be written in a single
4863 write() function, the timeout was being re-applied to each part-write.
4864 This seems wrong - if the receiver was accepting one byte at a time it
4865 would take for ever. The timeout is now adjusted when this happens. It
4866 doesn't have to be particularly precise.
4868 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4869 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4871 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4872 without a domain if the check to <postmaster@domain> fails.
4874 SC/01 Eximstats: added -xls and the ability to specify output files
4875 (patch written by Frank Heydlauf).
4877 SC/02 Eximstats: use FileHandles for outputting results.
4879 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4881 SC/04 Eximstats: fixed display of large numbers with -nvr option
4883 SC/05 Eximstats: fixed merging of reports with empty tables.
4885 SC/06 Eximstats: added the -include_original_destination flag
4887 SC/07 Eximstats: removed tabs and trailing whitespace.
4889 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4891 TK/06 MBOX spool code: Add real "From " MBOX separator line
4892 so the .eml file is really in mbox format (even though
4893 most programs do not really care). Patch from Alex Miller.
4895 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4896 The latter is generated from $received_to and is only set if the
4897 message has one envelope recipient. SA can use these headers,
4898 obviously out-of-the-box. Patch from Alex Miller.
4900 PH/08 The ${def test on a variable was returning false if the variable's
4901 value was "0", contrary to what the specification has always said!
4902 The result should be true unless the variable is empty.
4904 PH/09 The syntax error of a character other than { following "${if
4905 def:variable_name" (after optional whitespace) was not being diagnosed.
4906 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4907 accidental colon was present, for example, could give incorrect results.
4909 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4910 result is used (not including appendfile, where other changes are about
4913 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4914 This involved changing a lot of size variables from int to off_t. It
4915 should work with maildirs and everything.
4917 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4918 spamd dying while we are connected to it.
4920 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4923 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4924 function for BDB 4.3.
4926 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4928 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4929 the sources for PCRE have been re-arranged and more files are now
4932 PH/15 The code I had for printing potentially long long variables in PH/11
4933 above was not the best (it lost precision). The length of off_t variables
4934 is now inspected at build time, and an appropriate printing format (%ld
4935 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4936 to be "long long int" or "long int". This is needed for the internal
4937 formatting function string_vformat().
4939 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4940 the configuration file to be ":syslog", then the script "guesses" where
4941 the logs files are, rather than using the compiled in default. In our
4942 case the guess is not the same as the compiled default, so the script
4943 suddenly stopped working when I started to use syslog. The patch checks
4944 to see if log_file_path is "". If so, it attempts to read it from exim
4945 with no configuration file to get the compiled in version, before it
4946 falls back to the previous guessing code."
4948 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4949 implementing BATV in an Exim configuration. See NewStuff for the gory
4952 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4953 Makefile that are specific to HP-UX.
4955 PH/18 If the "use_postmaster" option was set for a recipient callout together
4956 with the "random" option, the postmaster address was used as the MAIL
4957 FROM address for the random test, but not for the subsequent recipient
4958 test. It is now used for both.
4960 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4961 patch removes a few documentation additions to RFC 3028, because the
4962 latest draft now contains them. It adds the new en;ascii-case comparator
4963 and a new error check for 8bit text in MIME parts. Comparator and
4964 require names are now matched exactly. I enabled the subaddress
4965 extension, but it is not well tested yet (read: it works for me)."
4967 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4968 rework some of the code of TK/09 above to avoid the hardwired use of
4969 "%lld" and "long long". Replaced the call to snprintf() with a call to
4972 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4973 records point to non-existent hosts", "retry timeout exceeded", and
4974 "retry time not reached for any host after a long failure period".
4976 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4977 experimental DomainKeys support:
4979 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4980 (2) On an error such as an illegally used "control", the wrong name for
4981 the control was given.
4983 These problems did NOT occur unless DomainKeys support was compiled.
4985 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4987 PH/24 Added ${if match_ip condition.
4989 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4990 databases so that it will be absolutely obvious if a crash occurs in the
4991 DB library. This is a regular occurrence (often caused by mis-matched
4994 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4995 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4996 picked up on a user's system that detects such things. There doesn't seem
4997 to be a gcc warning option for this - only an attribute that has to be
4998 put on the function's prototype. It seems that in Fedora Core 4 they have
4999 set this on a number of new functions. No doubt there will be more in due
5002 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5003 specify a transport. However, if an address that was verified by such a
5004 router was the subject of a callout, Exim crashed because it tried to
5005 read the rcpt_include_affixes from the non-existent transport. Now it
5006 just assumes that the setting of that option is false. This bug was
5007 introduced by 4.51/PH/31.
5009 PH/28 Changed -d+all to exclude +memory, because that information is very
5010 rarely of interest, but it makes the output a lot bigger. People tend to
5011 do -d+all out of habit.
5013 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5014 code in os-type was giving problems when libc.so lives in lib64, like on
5017 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5018 aren't the modern standard, and it seems that some systems' include files
5019 don't always have them. Exim was already checking for some of the newer
5020 ones like T_AAAA, and defining it itself. I've added checks for all the
5021 record types that Exim uses.
5023 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5024 not automatically generating a new one, as it is supposed to. This
5025 prevented TLS from working. If the file did exist, but contained invalid
5026 data, a new version was generated, as expected. It was only the case of a
5027 non-existent file that was broken.
5029 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5030 with a change in libdomainkeys > 0.64.
5032 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5033 from DNS. If the selector record carries the flag, it now has
5034 precedence over the domain-wide flag.
5036 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5038 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5039 the use of a port name that isn't defined in /etc/services) occurred, the
5040 message was deferred as in a normal delivery, and thus remained on the
5041 spool, instead of being failed because of the mua_wrapper setting. This
5042 is now fixed, and I tidied up some of the mua_wrapper messages at the
5045 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5046 the messages in a hash of arrays rather than using individual hashes.
5047 This is a bit cleaner and results in dramatic memory savings, albeit
5048 at a slight CPU cost.
5050 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5051 as requested by Marc Sherman.
5053 SC/10 Eximstats: added histograms for user specified patterns as requested
5056 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5058 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5059 fopen() in the content-scanning modules that did not already have it.
5065 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5066 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5068 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5070 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5072 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5073 to test Sieve filters that use "vacation".
5075 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5076 that changes the way the GnuTLS parameters are stored in the cache file.
5077 The new format can be generated externally. For backward compatibility,
5078 if the data in the cache doesn't make sense, Exim assumes it has read an
5079 old-format file, and it generates new data and writes a new file. This
5080 means that you can't go back to an older release without removing the
5083 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5084 work if there are any delivery delays because "one_time" forces the
5085 parent to be marked "delivered", so its unseen clone is never tried
5086 again. For this reason, Exim now forbids the simultaneous setting of
5089 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5090 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5091 entry if you want to know the details. The fix, however, neglected to
5092 consider the case when local delivery batching is involved. The test for
5093 "previously delivered" was not happening when checking to see if an
5094 address could be batched with a previous (undelivered) one; under
5095 certain circumstances this could lead to multiple deliveries to the same
5098 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5099 in its include files, and this causes problems building Exim.
5101 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5102 header_syntax) but Exim was just ignoring anything given after a slash.
5103 In particular, this caused confusion with an attempt to use "verify =
5104 reverse_host_lookup/defer_ok". An error is now given when options are
5105 supplied for verify items that do not have them. (Maybe reverse_host_
5106 lookup should have a defer_ok option, but that's a different point.)
5108 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5109 defined by RFC 821) to 2048, because there were problems with some AUTH
5110 commands, and RFC 1869 says the size should be increased for extended
5111 SMTP commands that take arguments.
5113 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5116 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5117 "unknown" error; now it says that the functionality isn't in the binary.
5119 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5120 an address' error message when a string expansion fails (syntax or
5121 whatever). Otherwise the password may appear in the log. Following change
5122 PH/42 below, there is no longer a chance of it appearing in a bounce
5125 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5127 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5128 of its addresses was ever tried. (Bugzilla bug #2.)
5130 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5131 the result incorrectly in the debug output. (It correctly added a newline
5132 to what was transported.)
5134 TF/01 Added $received_time.
5136 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5137 commented out examples of how to interface to a virus scanner and to
5138 SpamAssassin. Also added commented examples of av_scanner and
5139 spamd_address settings.
5141 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5142 and controls are allowed in which ACLs. There were a couple of minor
5143 errors. Some of the entries in the conditions table (which is a table of
5144 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5145 negation of where the condition IS allowed.
5147 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5149 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5150 header file does not have a version number, so I've had to invent a new
5151 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5152 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5153 radiusclient), but it was contributed by a Radius user.
5155 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5156 files or directories, for OpenSSL.
5158 PH/19 When an Exim process that is running as root has to create an Exim log
5159 file, it does so in a subprocess that runs as exim:exim so as to get the
5160 ownership right at creation (otherwise, other Exim processes might see
5161 the file with the wrong ownership). There was no test for failure of this
5162 fork() call, which would lead to the process getting stuck as it waited
5163 for a non-existent subprocess. Forks do occasionally fail when resources
5164 run out. I reviewed all the other calls to fork(); they all seem to check
5167 PH/20 When checking for unexpected SMTP input at connect time (before writing
5168 the banner), Exim was not dealing correctly with a non-positive return
5169 from the read() function. If the client had disconnected by this time,
5170 the result was a log entry for a synchronization error with an empty
5171 string after "input=" when read() returned zero. If read() returned -1
5172 (an event I could not check), uninitialized data bytes were printed.
5173 There were reports of junk text (parts of files, etc) appearing after
5176 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5178 PH/22 Added support for macro redefinition, and (re)definition in between
5179 driver and ACL definitions.
5181 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5182 forgetting to use the resulting value; it was using the unexpanded value.
5184 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5185 hadn't been configured. The fix is from Juergen Kreileder, who
5186 understands it better than I do:
5188 "Here's what I see happening with three configured cyrus_sasl
5189 authenticators configured (plain, login, cram-md5):
5191 On startup auth_cyrus_sasl_init() gets called for each of these.
5192 This means three calls to sasl_listmech() without a specified mech_list.
5193 => SASL tests which mechs of all available mechs actually work
5194 => three warnings about OTP not working
5195 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5197 With the patch, sasl_listmech() also gets called three times. But now
5198 SASL's mech_list option is set to the server_mech specified in the the
5199 authenticator. Or in other words, the answer from sasl_listmech()
5200 gets limited to just the mech you're testing for (which is different
5202 => the return list contains just 'plain' or 'login', 'cram-md5' or
5203 nothing depending on the value of ob->server_mech.
5205 I've just tested the patch: Authentication still works fine,
5206 unavailable mechs specified in the exim configuration are still
5207 caught, and the auth.log warnings about OTP are gone."
5209 PH/25 When debugging is enabled, the contents of the command line are added
5210 to the debugging output, even when log_selector=+arguments is not
5213 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5214 answer is "GNU", and only if the return is "GNU/something" is the answer
5217 PH/27 $acl_verify_message is now set immediately after the failure of a
5218 verification in an ACL, and so is available in subsequent modifiers. In
5219 particular, the message can be preserved by coding like this:
5221 warn !verify = sender
5222 set acl_m0 = $acl_verify_message
5224 Previously, $acl_verify_message was set only while expanding "message"
5225 and "log_message" when a very denied access.
5227 PH/28 Modified OS/os.c-Linux with
5229 -#ifndef OS_LOAD_AVERAGE
5230 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5232 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5233 nomenclature these days.)
5235 PH/29 Installed patch from the Sieve maintainer that adds the options
5236 sieve_useraddress and sieve_subaddress to the redirect router.
5238 PH/30 In these circumstances:
5239 . Two addresses routed to the same list of hosts;
5240 . First host does not offer TLS;
5241 . First host accepts first address;
5242 . First host gives temporary error to second address;
5243 . Second host offers TLS and a TLS session is established;
5244 . Second host accepts second address.
5245 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5246 and peerdn, if requested) that were in fact used only for the second
5249 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5250 attention to any local part prefix or suffix that was matched by the
5251 router that accepted the address. It now behaves in the same way as it
5252 does for delivery: the affixes are removed from the local part unless
5253 rcpt_include_affixes is set on the transport.
5255 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5256 timeout during the DATA phase of an incoming message.
5258 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5259 applied a patch sanctioned by the Sieve maintainer.
5261 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5262 the uid or gid is negative. A case of a negative gid caused this to be
5263 noticed. The fix allows for either to be negative.
5265 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5266 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5269 PH/36 The change PH/12 above was broken. Fixed it.
5271 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5272 the grounds that routing the same address twice would always produce the
5273 same answer. This might have been true once, but it is certainly no
5274 longer true now. Routing a child address may depend on the previous
5275 routing that produced that child. Some complicated redirection strategies
5276 went wrong when messages had multiple recipients, and made Exim's
5277 behaviour dependent on the order in which the addresses were given.
5279 I have moved the duplicate checking until after the routing is complete.
5280 Exim scans the addresses that are assigned to local and remote
5281 transports, and removes any duplicates. This means that more work will be
5282 done, as duplicates will always all be routed, but duplicates are
5283 presumably rare, so I don't expect this is of any significance.
5285 For deliveries to pipes, files, and autoreplies, the duplicate checking
5286 still happens during the routing process, since they are not going to be
5289 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5290 It corrects a timeout issue with spamd. This is Ian's comment: "The
5291 background is that sometimes spamd either never reads data from a
5292 connection it has accepted, or it never writes response data. The exiscan
5293 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5294 blindly assumes that writes won't block so it may never time out."
5296 PH/39 Allow G after quota size as well as K and M.
5298 PH/40 The value set for $authenticated_id in an authenticator may not contain
5299 binary zeroes or newlines because the value is written to log lines and
5300 to spool files. There was no check on this. Now the value is run through
5301 the string_printing() function so that such characters are converted to
5302 printable escape sequences.
5304 PH/41 $message_linecount is a new variable that contains the total number of
5305 lines in the message. Compare $body_linecount, which is the count for the
5308 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5309 bounce and delay warning messages, except in certain special cases, which
5312 (a) An SMTP error message from a remote host;
5313 (b) A message specified in a :fail: redirection;
5314 (c) A message specified in a "fail" command in a system filter;
5315 (d) A message specified in a FAIL return from the queryprogram router;
5316 (e) A message specified by the cannot_route_message router option.
5318 In these cases only, Exim does include the error details in bounce and
5319 warning messages. There are also a few cases where bland messages such
5320 as "unrouteable address" or "local delivery error" are given.
5322 PH/43 $value is now also set for the "else" part of a ${run expansion.
5324 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5325 being worked on, but at least Exim now implements the latest version to
5328 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5329 process to complete was treated as a delivery failure, a timeout while
5330 writing the message to the pipe was logged, but erroneously treated as a
5331 successful delivery. Such timeouts include transport filter timeouts. For
5332 consistency with the overall process timeout, these timeouts are now
5333 treated as errors, giving rise to delivery failures by default. However,
5334 there is now a new Boolean option for the pipe transport called
5335 timeout_defer, which, if set TRUE, converts the failures into defers for
5336 both kinds of timeout. A transport filter timeout is now identified in
5339 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5340 systems where "make" and "gmake" are different, calling "gmake" at top
5341 level broke things. I've arranged for the value of $(MAKE) to be passed
5342 from the Makefile to this script so that it can call the same version of
5346 A note about Exim versions 4.44 and 4.50
5347 ----------------------------------------
5349 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5350 changes of various kinds. As a consequence, a big documentation update was
5351 needed. This delayed the release for rather longer than seemed good, especially
5352 in the light of a couple of (minor) security issues. Therefore, the changes
5353 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5354 release. So 4.44 and 4.50 are in effect two different branches that both start
5357 I have left the 4.50 change log unchanged; it contains all the changes since
5358 4.43. The change log for 4.44 is below; many of its items are identical to
5359 those for 4.50. This seems to be the most sensible way to preserve the
5360 historical information.
5366 1. Minor wording change to the doc/README.SIEVE file.
5368 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5369 computation of the current number of files was incorrect.
5371 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5372 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5375 4. Give more explanation in the error message when the command for a transport
5376 filter fails to execute.
5378 5. There are several places where Exim runs a non-Exim command in a
5379 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5380 was being done only for the command run by the queryprogram router. It is
5381 now done for all such subprocesses. The other cases are: ${run, transport
5382 filters, and the commands run by the lmtp and pipe transports.
5384 6. Added CONFIGURE_GROUP build-time option.
5386 7. Some older OS have a limit of 256 on the maximum number of file
5387 descriptors. Exim was using setrlimit() to set 1000 as a large value
5388 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5389 systems. I've change it so that if it can't get 1000, it tries for 256.
5391 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5392 was an oversight, and furthermore, ever since the addition of extra
5393 controls (e.g. 4.43/32), the checks on when to allow different forms of
5394 "control" were broken. There should now be diagnostics for all cases when a
5395 control that does not make sense is encountered.
5397 9. Added the /retain_sender option to "control=submission".
5399 10. $recipients is now available in the predata ACL (oversight).
5401 11. Tidy the search cache before the fork to do a delivery from a message
5402 received from the command line. Otherwise the child will trigger a lookup
5403 failure and thereby defer the delivery if it tries to use (for example) a
5404 cached ldap connection that the parent has called unbind on.
5406 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5407 of $address_data from the recipient verification was clobbered by the
5408 sender verification.
5410 13. The value of address_data from a sender verification is now available in
5411 $sender_address_data in subsequent conditions in the ACL statement.
5413 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5415 15. Added a new option "connect=<time>" to callout options, to set a different
5418 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5419 was its contents. (It was OK if the option was not defined at all.)
5421 17. A "Completed" log line is now written for messages that are removed from
5422 the spool by the -Mrm option.
5424 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5425 information about exactly what failed.
5427 19. Added -dd to debug only the daemon process.
5429 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5430 handles timeouts, both on the server side and network timeouts. Renamed the
5431 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5433 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5434 It is now set to "smtps".
5436 22. $host_address is now set to the target address during the checking of
5437 ignore_target_hosts.
5439 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5440 being passed; this would have caused $sender_host_name to have been used if
5441 matching the list had actually called for a host name (not very likely,
5442 since this list is usually IP addresses). A host name is now passed as
5445 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5446 code that specifies a non-restarting handler (typically sigaction() in
5447 modern systems) in an attempt to fix a rare and obscure crash bug.
5449 25. Narrowed the window for a race in the daemon that could cause it to ignore
5450 SIGCHLD signals. This is not a major problem, because they are used only to
5451 wake it up if nothing else does.
5453 26. A malformed maildirsize file could cause Exim to calculate negative values
5454 for the mailbox size or file count. Odd effects could occur as a result.
5455 The maildirsize information is now recalculated if the size or filecount
5458 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5459 support for a long time. Removed HAVE_SYS_VFS_H.
5461 28. Installed the latest version of exipick from John Jetmore.
5463 29. In an address list, if the pattern was not a regular expression, an empty
5464 subject address (from a bounce message) matched only if the pattern was an
5465 empty string. Non-empty patterns were not even tested. This was the wrong
5466 because it is perfectly reasonable to use an empty address as part of a
5467 database query. An empty address is now tested by patterns that are
5468 lookups. However, all the other forms of pattern expect the subject to
5469 contain a local part and a domain, and therefore, for them, an empty
5470 address still always fails if the pattern is not itself empty.
5472 30. Exim went into a mad DNS loop when attempting to do a callout where the
5473 host was specified on an smtp transport, and looking it up yielded more
5474 than one IP address.
5476 31. Re-factored the code for checking spool and log partition space into a
5477 function that finds that data and another that does the check. The former
5478 is then used to implement four new variables: $spool_space, $log_space,
5479 $spool_inodes, and $log_inodes.
5481 32. The RFC2047 encoding function was originally intended for short strings
5482 such as real names; it was not keeping to the 75-character limit for
5483 encoded words that the RFC imposes. It now respects the limit, and
5484 generates multiple encoded words if necessary. To be on the safe side, I
5485 have increased the buffer size for the ${rfc2047: expansion operator from
5488 33. It is now permitted to omit both strings after an "if" condition; if the
5489 condition is true, the result is "true". As before, when the second string
5490 is omitted, a false condition yields an empty string. This makes it less
5491 cumbersome to write custom ACL and router conditions.
5493 34. Failure to deliver a bounce message always caused it to be frozen, even if
5494 there was an errors_to setting on the router. The errors_to setting is now
5497 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5498 canonical form (fully expanded) before being placed in
5499 $sender_host_address.
5501 36. The table in the code that translates DNS record types into text (T_A to
5502 "A" for instance) was missing entries for NS and CNAME. It is just possible
5503 that this could have caused confusion if both these types were looked up
5504 for the same domain, because the text type is used as part of Exim's
5505 per-process caching. But the chance of anyone hitting this buglet seems
5508 37. The dnsdb lookup has been extended in a number of ways.
5510 (1) There is a new type, "zns", which walks up the domain tree until it
5511 finds some nameserver records. It should be used with care.
5513 (2) There is a new type, "mxh", which is like "mx" except that it returns
5514 just the host names, not the priorities.
5516 (3) It is now possible to give a list of domains (or IP addresses) to be
5517 looked up. The behaviour when one of the lookups defers can be
5518 controlled by a keyword.
5520 (4) It is now possible to specify the separator character for use when
5521 multiple records are returned.
5523 38. The dnslists ACL condition has been extended: it is now possible to supply
5524 a list of IP addresses and/or domains to be looked up in a particular DNS
5527 39. Added log_selector=+queue_time_overall.
5529 40. When running the queue in the test harness, wait just a tad after forking a
5530 delivery process, to get repeatability of debugging output.
5532 41. Include certificate and key file names in error message when GnuTLS fails
5533 to set them up, because the GnuTLS error message doesn't include the name
5534 of the failing file when there is a problem reading it.
5536 42. Allow both -bf and -bF in the same test run.
5538 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5540 44. The "Exiscan patch" is now merged into the mainline Exim source.
5542 45. Sometimes the final signoff response after QUIT could fail to get
5543 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5544 < 0 before doing a fflush(). This bug looks as though it goes back to the
5545 introduction of TLS in release 3.20, but "sometimes" must have been rare
5546 because the tests only now provoked it.
5548 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5549 (this can affect the format of dates).
5551 47. exim_tidydb, when checking for the continued existence of a message for
5552 which it has found a message-specific retry record, was not finding
5553 messages that were in split spool directories. Consequently, it was
5554 deleting retry records that should have stayed in existence.
5556 48. Steve fixed some bugs in eximstats.
5558 49. The SPA authentication driver was not abandoning authentication and moving
5559 on to the next authenticator when an expansion was forced to fail,
5560 contradicting the general specification for all authenticators. Instead it
5561 was generating a temporary error. It now behaves as specified.
5563 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5564 (the order specifies the preference for clients). The order is now AES256,
5565 AES128, 3DES, ARCFOUR128.
5567 51. Small patch to Sieve code - explicitly set From: when generating an
5570 52. Exim crashed if a remote delivery caused a very long error message to be
5571 recorded - for instance if somebody sent an entire SpamAssassin report back
5572 as a large number of 550 error lines. This bug was coincidentally fixed by
5573 increasing the size of one of Exim's internal buffers (big_buffer) that
5574 happened as part of the Exiscan merge. However, to be on the safe side, I
5575 have made the code more robust (and fixed the comments that describe what
5578 53. Now that there can be additional text after "Completed" in log lines (if
5579 the queue_time_overall log selector is set), a one-byte patch to exigrep
5580 was needed to allow it to recognize "Completed" as not the last thing in
5583 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5584 patch that reportedly fixes this has been added. I am not expert enough to
5585 create a test for it. This is what the patch creator wrote:
5587 "I found a little strange behaviour of ldap code when working with
5588 Windows 2003 AD Domain, where users was placed in more than one
5589 Organization Units. When I tried to give exim partial DN, the exit code
5590 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5591 But simultaneously result of request was absolutely normal ldap result,
5592 so I produce this patch..."
5594 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5595 REFERENCE, so I have modified the code to exclude the patch when that macro
5598 55. Some experimental protocols are using DNS PTR records for new purposes. The
5599 keys for these records are domain names, not reversed IP addresses. The
5600 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5601 leaves it alone. Component reversal etc. now happens only for IP addresses.
5604 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5606 57. Double the size of the debug message buffer (to 2048) so that more of very
5607 long debug lines gets shown.
5609 58. The exicyclog utility now does better if the number of log files to keep
5610 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5612 59. Two changes related to the smtp_active_hostname option:
5614 (1) $smtp_active_hostname is now available as a variable.
5615 (2) The default for smtp_banner uses $smtp_active_hostname instead
5616 of $primary_hostname.
5618 60. The host_aton() function is supposed to be passed a string that is known
5619 to be a valid IP address. However, in the case of IPv6 addresses, it was
5620 not checking this. This is a hostage to fortune. Exim now panics and dies
5621 if the condition is not met. A case was found where this could be provoked
5622 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5623 components; fortuitously, this particular loophole had already been fixed
5624 by change 4.50/55 above.
5626 If there are any other similar loopholes, the new check in host_aton()
5627 itself should stop them being exploited. The report I received stated that
5628 data on the command line could provoke the exploit when Exim was running as
5629 exim, but did not say which command line option was involved. All I could
5630 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5631 running as the user.
5634 61. There was a buffer overflow vulnerability in the SPA authentication code
5635 (which came originally from the Samba project). I have added a test to the
5636 spa_base64_to_bits() function which I hope fixes it.
5639 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5640 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5642 63. The daemon start-up calls getloadavg() while still root for those OS that
5643 need the first call to be done as root, but it missed one case: when
5644 deliver_queue_load_max is set with deliver_drop_privilege. This is
5645 necessary for the benefit of the queue runner, because there is no re-exec
5646 when deliver_drop_privilege is set.
5648 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5649 This has been fixed.
5651 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5652 was in use, was not putting the data itself into the right store pool;
5653 consequently, it could be overwritten for a subsequent message in the same
5654 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5657 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5659 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5660 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5661 the function were treating the return as a boolean value, which happened to
5662 work because 0=false and not-0=true, but is not correct code.
5664 68. The host_aton() function was not handling scoped IPv6 addresses (those
5665 with, for example, "%eth0" on the end) correctly.
5667 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5668 negated items (that is, ~something) in unsigned ints. Some compilers
5669 apparently mutter when there is no cast.
5671 70. If an address verification called from an ACL failed, and did not produce a
5672 user-specific message (i.e. there was only a "system" message), nothing was
5673 put in $acl_verify_message. In this situation, it now puts the system
5676 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5677 session; change 4.31/43 added the unwanted input to the log line - except
5678 that it did not do this in the start of session case. It now does.
5680 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5681 This is wrong and can cause the other end to generate a synchronization
5682 error if it is another Exim or anything else that does the synchronization
5683 check. A QUIT command is no longer sent after a timeout.
5685 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5686 during host lookups.
5688 74. The defer_ok option of callout verification was not working if it was used
5689 when verifying addresses in header lines, that is, for this case:
5691 verify = header_sender/callout=defer_ok
5693 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5694 those file descriptors could be used for SMTP connections. If anything
5695 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5696 could be sent to the SMTP client, causing chaos. The daemon now opens
5697 stdin, stdout, and stderr to /dev/null when it puts itself into the
5700 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5701 log by default. The user can override this with suitable Perl magic.
5703 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5704 the log message when discard triggers, was not working for the DATA ACL or
5705 for the non-SMTP ACL.
5707 78. Error message wording change in sieve.c.
5709 79. If smtp_accept_max_per_host was set, the number of connections could be
5710 restricted to fewer than expected, because the daemon was trying to set up
5711 a new connection before checking whether the processes handling previous
5712 connections had finished. The check for completed processes is now done
5713 earlier. On busy systems, this bug wouldn't be noticed because something
5714 else would have woken the daemon, and it would have reaped the completed
5717 80. If a message was submitted locally by a user whose login name contained one
5718 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5719 It caused a spool format error. I have fixed the spool reading code. A
5720 related problem was that the "from" clause in the Received: line became
5721 illegal because of the space(s). It is now covered by ${quote_local_part.
5723 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5726 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5728 83. Patch from Sieve maintainer to fix unterminated string problem in
5729 "vacation" handling.
5731 84. Some minor changes to the Linux configuration files to help with other
5732 OS variants using glibc.
5734 85. One more patch for Sieve to update vacation handling to latest spec.
5737 ----------------------------------------------------
5738 See the note above about the 4.44 and 4.50 releases.
5739 ----------------------------------------------------
5745 1. Change 4.43/35 introduced a bug that caused file counts to be
5746 incorrectly computed when quota_filecount was set in an appendfile
5749 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5750 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5753 3. Give more explanation in the error message when the command for a transport
5754 filter fails to execute.
5756 4. There are several places where Exim runs a non-Exim command in a
5757 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5758 was being done only for the command run by the queryprogram router. It is
5759 now done for all such subprocesses. The other cases are: ${run, transport
5760 filters, and the commands run by the lmtp and pipe transports.
5762 5. Some older OS have a limit of 256 on the maximum number of file
5763 descriptors. Exim was using setrlimit() to set 1000 as a large value
5764 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5765 systems. I've change it so that if it can't get 1000, it tries for 256.
5767 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5768 was an oversight, and furthermore, ever since the addition of extra
5769 controls (e.g. 4.43/32), the checks on when to allow different forms of
5770 "control" were broken. There should now be diagnostics for all cases when a
5771 control that does not make sense is encountered.
5773 7. $recipients is now available in the predata ACL (oversight).
5775 8. Tidy the search cache before the fork to do a delivery from a message
5776 received from the command line. Otherwise the child will trigger a lookup
5777 failure and thereby defer the delivery if it tries to use (for example) a
5778 cached ldap connection that the parent has called unbind on.
5780 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5781 of $address_data from the recipient verification was clobbered by the
5782 sender verification.
5784 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5785 was its contents. (It was OK if the option was not defined at all.)
5787 11. A "Completed" log line is now written for messages that are removed from
5788 the spool by the -Mrm option.
5790 12. $host_address is now set to the target address during the checking of
5791 ignore_target_hosts.
5793 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5794 being passed; this would have caused $sender_host_name to have been used if
5795 matching the list had actually called for a host name (not very likely,
5796 since this list is usually IP addresses). A host name is now passed as
5799 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5800 code that specifies a non-restarting handler (typically sigaction() in
5801 modern systems) in an attempt to fix a rare and obscure crash bug.
5803 15. Narrowed the window for a race in the daemon that could cause it to ignore
5804 SIGCHLD signals. This is not a major problem, because they are used only to
5805 wake it up if nothing else does.
5807 16. A malformed maildirsize file could cause Exim to calculate negative values
5808 for the mailbox size or file count. Odd effects could occur as a result.
5809 The maildirsize information is now recalculated if the size or filecount
5812 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5813 support for a long time. Removed HAVE_SYS_VFS_H.
5815 18. Updated exipick to current release from John Jetmore.
5817 19. Allow an empty sender to be matched against a lookup in an address list.
5818 Previously the only cases considered were a regular expression, or an
5821 20. Exim went into a mad DNS lookup loop when doing a callout where the
5822 host was specified on the transport, if the DNS lookup yielded more than
5825 21. The RFC2047 encoding function was originally intended for short strings
5826 such as real names; it was not keeping to the 75-character limit for
5827 encoded words that the RFC imposes. It now respects the limit, and
5828 generates multiple encoded words if necessary. To be on the safe side, I
5829 have increased the buffer size for the ${rfc2047: expansion operator from
5832 22. Failure to deliver a bounce message always caused it to be frozen, even if
5833 there was an errors_to setting on the router. The errors_to setting is now
5836 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5837 canonical form (fully expanded) before being placed in
5838 $sender_host_address.
5840 24. Updated eximstats to version 1.33
5842 25. Include certificate and key file names in error message when GnuTLS fails
5843 to set them up, because the GnuTLS error message doesn't include the name
5844 of the failing file when there is a problem reading it.
5846 26. Expand error message when OpenSSL has problems setting up cert/key files.
5849 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5850 (this can affect the format of dates).
5852 28. exim_tidydb, when checking for the continued existence of a message for
5853 which it has found a message-specific retry record, was not finding
5854 messages that were in split spool directories. Consequently, it was
5855 deleting retry records that should have stayed in existence.
5857 29. eximstats updated to version 1.35
5858 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5859 1.35 - bugfix such that pie charts by volume are generated correctly
5861 30. The SPA authentication driver was not abandoning authentication and moving
5862 on to the next authenticator when an expansion was forced to fail,
5863 contradicting the general specification for all authenticators. Instead it
5864 was generating a temporary error. It now behaves as specified.
5866 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5867 (the order specifies the preference for clients). The order is now AES256,
5868 AES128, 3DES, ARCFOUR128.
5870 31. Small patch to Sieve code - explicitly set From: when generating an
5873 32. Exim crashed if a remote delivery caused a very long error message to be
5874 recorded - for instance if somebody sent an entire SpamAssassin report back
5875 as a large number of 550 error lines. This bug was coincidentally fixed by
5876 increasing the size of one of Exim's internal buffers (big_buffer) that
5877 happened as part of the Exiscan merge. However, to be on the safe side, I
5878 have made the code more robust (and fixed the comments that describe what
5881 33. Some experimental protocols are using DNS PTR records for new purposes. The
5882 keys for these records are domain names, not reversed IP addresses. The
5883 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5884 leaves it alone. Component reversal etc. now happens only for IP addresses.
5887 34. The host_aton() function is supposed to be passed a string that is known
5888 to be a valid IP address. However, in the case of IPv6 addresses, it was
5889 not checking this. This is a hostage to fortune. Exim now panics and dies
5890 if the condition is not met. A case was found where this could be provoked
5891 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5892 components; fortuitously, this particular loophole had already been fixed
5893 by change 4.50/55 or 4.44/33 above.
5895 If there are any other similar loopholes, the new check in host_aton()
5896 itself should stop them being exploited. The report I received stated that
5897 data on the command line could provoke the exploit when Exim was running as
5898 exim, but did not say which command line option was involved. All I could
5899 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5900 running as the user.
5903 35. There was a buffer overflow vulnerability in the SPA authentication code
5904 (which came originally from the Samba project). I have added a test to the
5905 spa_base64_to_bits() function which I hope fixes it.
5908 36. The daemon start-up calls getloadavg() while still root for those OS that
5909 need the first call to be done as root, but it missed one case: when
5910 deliver_queue_load_max is set with deliver_drop_privilege. This is
5911 necessary for the benefit of the queue runner, because there is no re-exec
5912 when deliver_drop_privilege is set.
5914 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5915 was in use, was not putting the data itself into the right store pool;
5916 consequently, it could be overwritten for a subsequent message in the same
5917 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5920 38. Sometimes the final signoff response after QUIT could fail to get
5921 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5922 < 0 before doing a fflush(). This bug looks as though it goes back to the
5923 introduction of TLS in release 3.20, but "sometimes" must have been rare
5924 because the tests only now provoked it.
5930 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5931 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5932 Now it returns an integer. A number of calls were still expecting a T/F
5933 return. Fortuitously, in all cases, the tests worked in OK situations,
5934 which is the norm. However, things would have gone wrong on any write
5935 failures on the smtp file descriptor. This function is used when sending
5936 messages over SMTP and also when doing verify callouts.
5938 2. When Exim is called to do synchronous delivery of a locally submitted
5939 message (the -odf or -odi options), it no longer closes stderr before doing
5942 3. Implemented the mua_wrapper option.
5944 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5946 5. Implemented the functions header_remove(), header_testname(),
5947 header_add_at_position(), and receive_remove_recipient(), and exported them
5950 6. If an ACL "warn" statement specified the addition of headers, Exim already
5951 inserted X-ACL-Warn: at the start if there was no header name. However, it
5952 was not making this test for the second and subsequent header lines if
5953 there were newlines in the string. This meant that an invalid header could
5954 be inserted if Exim was badly configured.
5956 7. Allow an ACL "warn" statement to add header lines at the start or after all
5957 the Received: headers, as well as at the end.
5959 8. Added the rcpt_4xx retry error code.
5961 9. Added postmaster_mailfrom=xxx to callout verification option.
5963 10. Added mailfrom=xxxx to the callout verification option, for verify=
5966 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5967 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5969 12. Inserted some casts to stop certain compilers warning when using pointer
5970 differences as field lengths or precisions in printf-type calls (mostly
5971 affecting debugging statements).
5973 13. Added optional readline() support for -be (dynamically loaded).
5975 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5976 same clock tick as a message's arrival, so that its received time was the
5977 same as the "first fail" time on the retry record, and that message
5978 remained on the queue past the ultimate address timeout, every queue runner
5979 would try a delivery (because it was past the ultimate address timeout) but
5980 after another failure, the ultimate address timeout, which should have then
5981 bounced the address, did not kick in. This was a "< instead of <=" error;
5982 in most cases the first failure would have been in the next clock tick
5983 after the received time, and all would be well.
5985 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5986 being recognized when the domain list was tested by the match_domain
5987 condition in an expansion string.
5989 16. Added the ${str2b64: operator.
5991 17. Exim was always calling setrlimit() to set a large limit for the number of
5992 processes, without checking whether the existing limit was already
5993 adequate. (It did check for the limit on file descriptors.) Furthermore,
5994 errors from getrlimit() and setrlimit() were being ignored. Now they are
5995 logged to the main and panic logs, but Exim does carry on, to try to do its
5996 job under whatever limits there are.
5998 18. Imported PCRE 5.0.
6000 19. Trivial typo in log message " temporarily refused connection" (the leading
6003 20. If the log selector return_path_on_delivery was set and an address was
6004 redirected to /dev/null, the delivery process crashed because it assumed
6005 that a return path would always be set for a "successful" delivery. In this
6006 case, the whole delivery is bypassed as an optimization, and therefore no
6009 21. Internal re-arrangement: the function for sending a challenge and reading
6010 a response while authentication was assuming a zero-terminated challenge
6011 string. It's now changed to take a pointer and a length, to allow for
6012 binary data in such strings.
6014 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6016 23. Exim was not respecting finduser_retries when seeking the login of the
6017 uid under which it was called; it was always trying 10 times. (The default
6018 setting of finduser_retries is zero.) Also, it was sleeping after the final
6019 failure, which is pointless.
6021 24. Implemented tls_on_connect_ports.
6023 25. Implemented acl_smtp_predata.
6025 26. If the domain in control=submission is set empty, Exim assumes that the
6026 authenticated id is a complete email address when it generates From: or
6027 Sender: header lines.
6029 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6030 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6031 chown and chgrp in /bin and hostname in /usr/bin.
6033 28. Exim was keeping the "process log" file open after each use, just as it
6034 does for the main log. This opens the possibility of it remaining open for
6035 long periods when the USR1 signal hits a daemon. Occasional processlog
6036 errors were reported, that could have been caused by this. Anyway, it seems
6037 much more sensible not to leave this file open at all, so that is what now
6040 29. The long-running daemon process does not normally write to the log once it
6041 has entered its main loop, and it closes the log before doing so. This is
6042 so that log files can straightforwardly be renamed and moved. However,
6043 there are a couple of unusual error situations where the daemon does write
6044 log entries, and I had neglected to close the log afterwards.
6046 30. The text of an SMTP error response that was received during a remote
6047 delivery was being truncated at 512 bytes. This is too short for some of
6048 the long messages that one sometimes sees. I've increased the limit to
6051 31. It is now possible to make retry rules that apply only when a message has a
6052 specific sender, in particular, an empty sender.
6054 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6055 it possible to be selective about when SMTP synchronization is enforced.
6057 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6059 32. Implemented hosts_connection_nolog.
6061 33. Added an ACL for QUIT.
6063 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6066 35. Added mailbox_size and mailbox_filecount to appendfile.
6068 36. Added control = no_multiline_responses to ACLs.
6070 37. There was a bug in the logic of the code that waits for the clock to tick
6071 in the case where the clock went backwards by a substantial amount such
6072 that the microsecond fraction of "now" was more than the microsecond
6073 fraction of "then" (but the whole seconds number was less).
6075 38. Added support for the libradius Radius client library this is found on
6076 FreeBSD (previously only the radiusclient library was supported).
6082 1. When certain lookups returned multiple values in the form name=value, the
6083 quoting of the values was not always being done properly. Specifically:
6084 (a) If the value started with a double quote, but contained no whitespace,
6086 (b) If the value contained whitespace other than a space character (i.e.
6087 tabs or newlines or carriage returns) it was not quoted.
6088 This fix has been applied to the mysql and pgsql lookups by writing a
6089 separate quoting function and calling it from the lookup code. The fix
6090 should probably also be applied to nisplus, ibase and oracle lookups, but
6091 since I cannot test any of those, I have not disturbed their existing code.
6093 2. A hit in the callout cache for a specific address caused a log line with no
6094 reason for rejecting RCPT. Now it says "Previous (cached) callout
6095 verification failure".
6097 3. There was an off-by-one bug in the queryprogram router. An over-long
6098 return line was truncated at 256 instead of 255 characters, thereby
6099 overflowing its buffer with the terminating zero. As well as fixing this, I
6100 have increased the buffer size to 1024 (and made a note to document this).
6102 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6103 when Exim is waiting for an SMTP response from a remote server, Exim
6104 restarts its select() call on the socket, thereby resetting its timeout.
6105 This is not a problem when such interrupts are rare. Somebody set up a cron
6106 job to run exiwhat every 2 minutes, which is less than the normal select()
6107 timeout (5 or 10 minutes). This meant that the select() timeout never
6108 kicked in because it was always reset. I have fixed this by comparing the
6109 time when an interrupt arrives with the time at the start of the first call
6110 to select(). If more time than the timeout has elapsed, the interrupt is
6111 treated as a timeout.
6113 5. Some internal re-factoring in preparation for the addition of Sieve
6114 extensions (by MH). In particular, the "personal" test is moved to a
6115 separate function, and given an option for scanning Cc: and Bcc: (which is
6116 not set for Exim filters).
6118 6. When Exim created an email address using the login of the caller as the
6119 local part (e.g. when creating a From: or Sender: header line), it was not
6120 quoting the local part when it contained special characters such as @.
6122 7. Installed new OpenBSD configuration files.
6124 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6125 try to make them clearer.
6127 9. Callout options, other than the timeout value, were being ignored when
6128 verifying sender addresses in header lines. For example, when using
6130 verify = header_sender/callout=no_cache
6132 the cache was (incorrectly) being used.
6134 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6135 only the Cygwin environment.
6137 11. When return_path_on_delivery was set as a log selector, if different remote
6138 addresses in the same message used different return paths and parallel
6139 remote delivery occurred, the wrong values would sometimes be logged.
6140 (Whenever a remote delivery process finished, the return path value from
6141 the most recently started remote delivery process was logged.)
6143 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6144 lines when AUTH and/or TLS are in use. This is the "received protocol"
6145 field. Exim used to use "asmtp" for authenticated SMTP, without any
6146 indication (in the protocol name) for TLS use. Now it follows the RFC and
6147 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6148 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6149 names appear in log lines as well as in Received: header lines.
6151 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6152 extensions, and comparison tests, and to fix some bugs.
6154 14. Changes to the "personal" filter test:
6156 (1) The test was buggy in that it was just doing the equivalent of
6157 "contains" tests on header lines. For example, if a user's address was
6158 anne@some.where, the "personal" test would incorrectly be true for
6160 To: susanne@some.where
6162 This test is now done by extracting each address from the header in turn,
6163 and checking the entire address. Other tests that are part of "personal"
6164 are now done using regular expressions (for example, to check local parts
6165 of addresses in From: header lines).
6167 (2) The list of non-personal local parts in From: addresses has been
6168 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6169 taken from the Sieve specification recommendations.
6171 (3) If the message contains any header line starting with "List-" it is
6172 treated as non-personal.
6174 (4) The test for "circular" in the Subject: header line has been removed
6175 because it now seems ill-conceived.
6177 15. Minor typos in src/EDITME comments corrected.
6179 16. Installed latest exipick from John Jetmore.
6181 17. If headers_add on a router specified a text string that was too long for
6182 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6183 of string_sprintf() is now avoided.
6185 18. $message_body_size was not set (it was always zero) when running the DATA
6186 ACL and the local_scan() function.
6188 19. For the "mail" command in an Exim filter, no default was being set for
6189 the once_repeat time, causing a random time value to be used if "once" was
6190 specified. (If the value happened to be <= 0, no repeat happened.) The
6191 default is now 0s, meaning "never repeat". The "vacation" command was OK
6192 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6193 (I found it when inspecting the code).
6195 20. There is now an overall timeout for performing a callout verification. It
6196 defaults to 4 times the callout timeout, which applies to individual SMTP
6197 commands during the callout. The overall timeout applies when there is more
6198 than one host that can be tried. The timeout is checked before trying the
6199 next host. This prevents very long delays if there are a large number of
6200 hosts and all are timing out (e.g. when the network connections are timing
6201 out). The value of the overall timeout can be changed by specifying an
6202 additional sub-option for "callout", called "maxwait". For example:
6204 verify = sender/callout=5s,maxwait=20s
6206 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6207 to the end before writing, but this should make it even safer).
6209 22. Exim was forgetting that it had advertised PIPELINING for the second and
6210 subsequent messages on an SMTP connection. It was also not resetting its
6211 memory on STARTTLS and an internal HELO.
6213 23. When Exim logs an SMTP synchronization error within a session, it now
6214 records whether PIPELINING has been advertised or not.
6216 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6217 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6218 rather than long int.
6220 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6222 26. Added the never_mail option to autoreply.
6228 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6229 crash if the getsockname() call failed; this can happen if a connection is
6230 closed very soon after it is established. The problem was simply in the
6231 order in which certain operations were done, causing Exim to try to write
6232 to the SMTP stream before it had set up the file descriptor. The bug has
6233 been fixed by making things happen in the correct order.
6239 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6240 before the connection was closed, thus losing the rejection response.
6242 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6243 some early Solaris releases, but causes trouble in current releases where
6244 socklen_t is defined.
6246 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6249 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6252 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6253 that releasing the top of it at the end releases what was used for sub-
6254 expansions (unless the block got too big). However, discard this block if
6255 the first thing is a variable or header, so that we can use its block when
6256 it is dynamic (useful for very large $message_headers, for example).
6258 6. Lookups now cache *every* query, not just the most recent. A new, separate
6259 store pool is used for this. It can be recovered when all lookup caches are
6260 flushed. Lookups now release memory at the end of their result strings.
6261 This has involved some general refactoring of the lookup sources.
6263 7. Some code has been added to the store_xxx() functions to reduce the amount
6264 of flapping under certain conditions.
6266 8. log_incoming_interface used to affect only the <= reception log lines. Now
6267 it causes the local interface and port to be added to several more SMTP log
6268 lines, for example "SMTP connection from", and rejection lines.
6270 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6272 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6274 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6275 could be overwritten at the end of the current message (or the start of a
6276 new message if it was set in a HELO ACL). The value is now preserved for
6277 the duration of the SMTP connection.
6279 12. If a transport had a headers_rewrite setting, and a matching header line
6280 contained an unqualified address, that address was qualified, even if it
6281 did not match any rewriting rules. The underlying bug was that the values
6282 of the flags that permit the existence of unqualified sender and recipient
6283 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6284 non-local messages, and by -bnq for local messages) were not being
6285 preserved with the message after it was received.
6287 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6288 "next input=" as part of the text comprising the host identity instead of
6289 the correct text. The code was using the same buffer for two different
6290 strings. However, depending on which order the printing function evaluated
6291 its arguments, the bug did not always show up. Under Linux, for example, my
6292 test suite worked just fine.
6294 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6295 doesn't work with some older versions of Perl. It has been changed to "my",
6296 which in any case is probably the better facility to use.
6298 15. A really picky compiler found some instances of statements for creating
6299 error messages that either had too many or two few arguments for the format
6302 16. The size of the buffer for calls to the DNS resolver has been increased
6303 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6304 for addresses that have a lot of PTR records. This alleviates a problem; it
6305 does not fully solve it.
6307 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6308 buffer now truncates the list and logs the incident, which is the same
6309 action as happens when Exim is looking up a host name and its aliases.
6310 Previously in this situation something unpredictable would happen;
6311 sometimes it was "internal error: store_reset failed".
6313 18. If a server dropped the connection unexpectedly when an Exim client was
6314 using GnuTLS and trying to read a response, the client delivery process
6315 crashed while trying to generate an error log message.
6317 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6318 string, for example:
6320 warn message = H1: something\nH2: something
6322 the text was added as a single header line from Exim's point of view
6323 though it ended up OK in the delivered message. However, searching for the
6324 second and subsequent header lines using $h_h2: did not work. This has been
6325 fixed. Similarly, if a system filter added multiple headers in this way,
6326 the routers could not see them.
6328 20. Expanded the error message when iplsearch is called with an invalid key to
6329 suggest using net-iplsearch in a host list.
6331 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6332 ACLs are no longer actually imposed (and a message to that effect is
6335 22. If a "gecos" field in a passwd entry contained escaped characters, in
6336 particular, if it contained a \" sequence, Exim got it wrong when building
6337 a From: or a Sender: header from that name. A second bug also caused
6338 incorrect handling when an unquoted " was present following a character
6339 that needed quoting.
6341 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6342 was not being matched caselessly.
6344 24. Arranged for all hyphens in the exim.8 source to be escaped with
6347 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6348 properly. Recipient callout cache records were still being keyed to include
6349 the sender, even when use_sender was set false. This led to far more
6350 callouts that were necessary. The sender is no longer included in the key
6351 when use_sender is false.
6353 26. Added "control = submission" modifier to ACLs.
6355 27. Added the ${base62d: operator to decode base 62 numbers.
6357 28. dnsdb lookups can now access SRV records.
6359 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6360 the configuration file.
6362 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6363 (-v) mode. This makes the output for a verbose queue run more intelligible.
6365 31. Added a use_postmaster feature to recipient callouts.
6367 32. Added the $body_zerocount variable, containing the number of binary zero
6368 bytes in the message body.
6370 33. The time of last modification of the "new" subdirectory is now used as the
6371 "mailbox time last read" when there is a quota error for a maildir
6374 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6376 35. Added +ignore_unknown as a special item in host lists.
6378 36. Code for decoding IPv6 addresses in host lists is now included, even if
6379 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6380 address was recognized as an IP address, but was then not correctly decoded
6381 into binary, causing unexpected and incorrect effects when compared with
6388 1. Very minor rewording of debugging text in manualroute to say "list of
6389 hosts" instead of "hostlist".
6391 2. If verify=header_syntax was set, and a header line with an unqualified
6392 address (no domain) and a large number of spaces between the end of the
6393 name and the colon was received, the reception process suffered a buffer
6394 overflow, and (when I tested it) crashed. This was caused by some obsolete
6395 code that should have been removed. The fix is to remove it!
6397 3. When running in the test harness, delay a bit after writing a bounce
6398 message to get a bit more predictability in the log output.
6400 4. Added a call to search_tidyup() just before forking a reception process. In
6401 theory, someone could use a lookup in the expansion of smtp_accept_max_
6402 per_host which, without the tidyup, could leave open a database connection.
6404 5. Added the variables $recipient_data and $sender_data which get set from a
6405 lookup success in an ACL "recipients" or "senders" condition, or a router
6406 "senders" option, similar to $domain_data and $local_part_data.
6408 6. Moved the writing of debug_print from before to after the "senders" test
6411 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6412 problems for message scanning, either using a data ACL, or using
6413 local_scan() because the Received: header was not generated till after they
6414 were called (in order to set the time as the time of reception completion).
6415 I have revised the way this works. The header is now generated after the
6416 body is received, but before the ACL or local_scan() are called. After they
6417 are run, the timestamp in the header is updated.
6423 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6424 before starting a queue runner without re-exec. This happened only when
6425 deliver_drop_privilege was set or when the Exim user was set to root. The
6426 effect of the bug was that timeouts during subsequent deliveries caused
6427 crashes instead of being properly handled. The handler is now left at its
6428 default (and expected) setting.
6430 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6431 message, again when deliver_drop_privilege is set or Exim is run as root.
6432 The bug described in (1) was not present in this case, but the tidying up
6433 of the other signals was missing. I have made the two cases consistent.
6435 3. The ignore_target_hosts setting on a manualroute router was being ignored
6436 for hosts that were looked up using the /MX notation.
6438 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6441 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6442 operated on the sender address. After changing the $sender_address to <>
6443 for the sender address verify, Exim was re-instated it as the original
6444 (before rewriting) address, but remembering that it had rewritten it, so it
6445 wasn't rewriting it again. This bug also had the effect of breaking the
6446 sender address verification caching when the sender address was rewritten.
6448 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6449 This has been changed so that if the ip literal address matches
6450 ignore_target_hosts, the router declines.
6452 7. Added expansion conditions match_domain, match_address, and match_local_
6453 part (NOT match_host).
6455 8. The placeholder for the Received: header didn't have a length field set.
6457 9. Added code to Exim itself and to exim_lock to test for a specific race
6458 condition that could lead to file corruption when using MBX delivery. The
6459 issue is with the lockfile that is created in /tmp. If this file is removed
6460 after a process has opened it but before that process has acquired a lock,
6461 there is the potential for a second process to recreate the file and also
6462 acquire a lock. This could lead to two Exim processes writing to the file
6463 at the same time. The added code performs the same test as UW imapd; it
6464 checks after acquiring the lock that its file descriptor still refers to
6465 the same named file.
6467 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6468 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6471 11. Added the smtp_active_hostname option. If used, this will typically be made
6472 to depend on the incoming interface address. Because $interface_address is
6473 not set up until the daemon has forked a reception process, error responses
6474 that can happen earlier (such as "too many connections") no longer contain
6477 12. If an expansion in a condition on a "warn" statement fails because a lookup
6478 defers, the "warn" statement is abandoned, and the next ACL statement is
6479 processed. Previously this caused the whole ACL to be aborted.
6481 13. Added the iplsearch lookup type.
6483 14. Added ident_timeout as a log selector.
6485 15. Added tls_certificate_verified as a log selector.
6487 16. Added a global option tls_require_ciphers (compare the smtp transport
6488 option of the same name). This controls incoming TLS connections.
6490 17. I finally figured out how to make tls_require_ciphers do a similar thing
6491 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6492 before starting the TLS session.
6494 18. Tabs are now shown as \t in -bP output.
6496 19. If the log selector return_path_on_delivery was set, Exim crashed when
6497 bouncing a message because it had too many Received: header lines.
6499 20. If two routers both had headers_remove settings, and the first one included
6500 a superfluous trailing colon, the final name in the first list and the
6501 first name in the second list were incorrectly joined into one item (with a
6502 colon in the middle).
6508 1. Added -C and -D options to the exinext utility, mainly to make it easier
6509 to include in the automated testing, but these could be helpful when
6510 multiple configurations are in use.
6512 2. The exinext utility was not formatting the output nicely when there was
6513 an alternate port involved in the retry record key, nor when there was a
6514 message id as well (for retries that were specific to a specific message
6515 and a specific host). It was also confused by IPv6 addresses, because of
6516 the additional colons they contain. I have fixed the IPv4 problem, and
6517 patched it up to do a reasonable job for IPv6.
6519 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6520 delivery, the log line now contains "pipelined" if PIPELINING was used.
6522 4. An SMTP transport process used to panic and die if the bind() call to set
6523 an explicit outgoing interface failed. This has been changed; it is now
6524 treated in the same way as a connect() failure.
6526 5. A reference to $sender_host_name in the part of a conditional expansion
6527 that was being skipped was still causing a DNS lookup. This no longer
6530 6. The def: expansion condition was not recognizing references to header lines
6531 that used bh_ and bheader_.
6533 7. Added the _cache feature to named lists.
6535 8. The code for checking quota_filecount in the appendfile transport was
6536 allowing one more file than it should have been.
6538 9. For compatibility with Sendmail, the command line option
6546 and sets the incoming protocol and host name (for trusted callers). The
6547 host name and its colon can be omitted when only the protocol is to be set.
6548 Note the Exim already has two private options, -pd and -ps, that refer to
6549 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6550 "s", but I don't think that's a major issue.
6552 10. A number of refactoring changes to the code, none of which should affect
6555 (a) The number of logging options was getting close to filling up the
6556 32-bit word that was used as a bit map. I have split them into two classes:
6557 those that are passed in the argument to log_write(), and those that are
6558 only ever tested independently outside of that function. These are now in
6559 separate 32-bit words, so there is plenty of room for expansion again.
6560 There is no change in the user interface or the logging behaviour.
6562 (b) When building, for example, log lines, the code previously used a
6563 macro that called string_cat() twice, in order to add two strings. This is
6564 not really sufficiently general. Furthermore, there was one instance where
6565 it was actually wrong because one of the argument was used twice, and in
6566 one call a function was used. (As it happened, calling the function twice
6567 did not affect the overall behaviour.) The macro has been replaced by a
6568 function that can join an arbitrary number of extra strings onto a growing
6571 (c) The code for expansion conditions now uses a table and a binary chop
6572 instead of a serial search (which was left over from when there were very
6573 few conditions). Also, it now recognizes conditions like "pam" even when
6574 the relevant support is not compiled in: a suitably worded error message is
6575 given if an attempt is made to use such a condition.
6577 11. Added ${time_interval:xxxxx}.
6579 12. A bug was causing one of the ddress fields not to be passed back correctly
6580 from remote delivery subprocesses. The field in question was not being
6581 subsequently used, so this caused to problems in practice.
6583 13. Added new log selectors queue_time and deliver_time.
6585 14. Might have fixed a bug in maildirsizefile handling that threw up
6586 "unexpected character" debug warnings, and recalculated the data
6587 unnecessarily. In any case, I expanded the warning message to give more
6590 15. Added the message "Restricted characters in address" to the statements in
6591 the default ACL that block characters like @ and % in local parts.
6593 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6594 Three changes have been made:
6596 (a) There was a serious bug; a negative response to MAIL caused the whole
6597 recipient domain to be cached as invalid, thereby blocking all messages
6598 to all local parts at the same domain, from all senders. This bug has
6599 been fixed. The domain is no longer cached after a negative response to
6600 MAIL if the sender used is not empty.
6602 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6605 (c) A new callout option, "use_sender" has been added for people who want
6606 the modified behaviour.
6612 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6615 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6616 indeed breaks things for older releases.
6618 3. Added additional logging to the case where there is a problem reading data
6619 from a filter that is running in a subprocess using a pipe, in order to
6620 try to track down a specific problem.
6622 4. Testing facility fudge: when running in the test harness and attempting
6623 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6624 getting "No route to host". Convert this to a timeout.
6626 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6629 6. Some OS don't have socklen_t but use size_t instead. This affects the
6630 fifth argument of getsockopt() amongst other things. This is now
6631 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6632 can be set for individual OS. I have set it for SunOS5, OSF1, and
6633 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6634 some earlier ones do not.
6636 7. Change 4.30/15 was not doing the test caselessly.
6638 8. The standard form for an IPv6 address literal was being rejected by address
6639 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6640 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6641 this, as well as the form without the "IPv6" on the front (but only when
6642 address literals are enabled, of course).
6644 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6646 10. Exim crashed if a message with an empty sender address specified by -f
6647 encountered a router with an errors_to setting. This could be provoked only
6648 by a command such as
6652 where an empty string was supplied; "<>" did not hit this bug.
6654 11. Installed PCRE release 4.5.
6656 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6657 remained set. It is now erased.
6659 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6660 times from message ids (which are base 36 rather than the normal 62).
6662 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6663 were being counted as actual protocol errors, and logged if the log
6664 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6665 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6666 and DATA following a set of rejected RCPTs do not count as protocol errors.
6667 In other words, Exim assumes they were pipelined, though this may not
6668 actually be the case. Of course, in all cases the client gets an
6669 appropriate error code.
6671 15. If a lookup fails in an ACL condition, a message about the failure may
6672 be available; it is used if testing the ACL cannot continue, because most
6673 such messages specify what the cause of the deferral is. However, some
6674 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6675 that caused an old message to be retained and used if a later statement
6676 caused a defer, replacing the real cause of the deferral.
6678 16. If an IP address had so many PTR records that the DNS lookup buffer
6679 was not large enough to hold them, Exim could crash while trying to process
6680 the truncated data. It now detects and logs this case.
6682 17. Further to 4.21/58, another change has been made: if (and only if) the
6683 first line of a message (the first header line) ends with CRLF, a bare LF
6684 in a subsequent header line has a space inserted after it, so as not to
6685 terminate the header.
6687 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6688 unnecessarily, used atoi() instead of strtol(), and didn't check the
6689 termination when getting file sizes from file names by regex.
6691 19. Completely re-implemented the support for maildirsize files, in the light
6692 of a number of problems with the previous contributed implementation
6693 (4.30/29). In particular:
6695 . If the quota is zero, the maildirsize file is maintained, but no quota is
6698 . If the maildir directory does not exist, it is created before any attempt
6699 to write a maildirsize file.
6701 . The quota value in the file is just a cache; if the quota is changed in
6702 the transport, the new value overrides.
6704 . A regular expression is available for excluding directories from the
6707 20. The autoreply transport checks the characters in options that define the
6708 message's headers; it allows continued headers, but it was checking with
6709 isspace() after an embedded newline instead of explicitly looking for a
6712 21. If all the "regular" hosts to which an address was routed had passed their
6713 expiry times, and had not reached their retry times, the address was
6714 bounced, even if fallback hosts were defined. Now Exim should go on to try
6717 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6718 equivalent code in the SMTP transport. Some hosts send humungous responses
6719 to HELO/EHLO, more than 1024 it seems.
6721 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6722 gives compiler warnings in some environments. I've now done it "properly",
6725 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6726 (because of problems with the built-in one) was declared to return uschar *
6727 instead of char *, causing compiler failure.
6729 25. Fixed a file descriptor leak when processing alias/forward files.
6731 26. Fixed a minor format string issue in dbfn.c.
6733 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6735 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6736 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6739 29. When a sender address is verified, it is cached, to save repeating the test
6740 when there is more than one recipient in a message. However, when the
6741 verification involves a callout, it is possible for different callout
6742 options to be set for different recipients. It is too complicated to keep
6743 track of this in the cache, so now Exim always runs a verification when a
6744 callout is required, relying on the callout cache for the optimization.
6745 The overhead is duplication of the address routing, but this should not be
6748 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6749 to be verified with callout=postmaster, and the main callout worked but the
6750 postmaster check failed, the verification correctly failed. However, if a
6751 subsequent RCPT command asked for sender verification *without* the
6752 postmaster check, incorrect caching caused this verification also to fail,
6755 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6756 it was not caching the DNS options (qualify_single, search_parents) that
6757 were used when the lookup failed. A subsequent lookup with different
6758 options therefore always gave the same answer, though there were cases
6759 where it should not have. (Example: a "domains = !$mx_any" option on a
6760 dnslookup router: the "domains" option is always processed without any
6761 widening, but the router might have qualify_single set.) Now Exim uses the
6762 cached value only when the same options are set.
6764 32. Added John Jetmore's "exipick" utility to the distribution.
6766 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6767 than a timeout (e.g. a certificate is required, and is not provided), an
6768 Exim server now closes the connection immediately. Previously it waited for
6769 the client to close - but if the client is SSL, it seems that they each
6770 wait for each other, leading to a delay before one of them times out.
6772 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6773 maintained 0.8.x compatibility because I don't think many are using it, and
6774 it is clearly obsolete.
6776 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6779 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6780 client certificate was expired. A simple patch fixes this, though I don't
6781 understand the full logic of why the verify callback is called multiple
6784 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6785 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6786 which causes problems with some clients (such as the Certicom SSL Plus
6787 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6788 disables the coutermeasure allowing Eudora to connect."
6790 38. Exim was not checking that a write() to a log file succeeded. This could
6791 lead to Bad Things if a log got too big, in particular if it hit a file
6792 size limit. Exim now panics and dies if it cannot write to a log file, just
6793 as it does if it cannot open a log file.
6795 39. Modified OS/Makefile-Linux so that it now contains
6797 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6799 The two -D definitions ensure that Exim is compiled with large file
6800 support, which makes it possible to handle log files that are bigger than
6803 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6804 instance) a domain was checked against a named list that involved a lookup,
6805 causing $domain_data to be set, then another domain was checked against the
6806 same list, then the first domain was re-checked, the value of $domain_data
6807 after the final check could be wrong. In particular, if the second check
6808 failed, it could be set empty. This bug probably also applied to
6811 41. The strip_trailing_dot option was not being applied to the address given
6812 with the -f command-line option.
6814 42. The code for reading a message's header from the spool was incrementing
6815 $received_count, but never initializing it. This meant that the value was
6816 incorrect (doubled) while delivering a message in the same process in which
6817 it was received. In the most common configuration of Exim, this never
6818 happens - a fresh exec is done - but it can happen when
6819 deliver_drop_privilege is set.
6821 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6822 it now includes up to 150 characters of the unexpected data in the log
6825 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6826 and building data strings. The size of both of these buffers was 10 000
6827 bytes - far larger than anybody would *ever* want, thought I. Needless to
6828 say, somebody hit the limit. I have increased the maximum line length to
6829 20 000 and the maximum data length of concatenated lines to 100 000. I have
6830 also fixed two bugs, because there was no checking on these buffers. Tsk,
6831 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6832 buffer is too small.
6834 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6835 lsearch lookups. Now it does.
6837 46. When parsing a route_list item in a manualroute router, a fixed-length
6838 buffer was used for the list of hosts. I made this 1024 bytes long,
6839 thinking that nobody would ever have a list of hosts that long. Wrong.
6840 Somebody had a whole pile of complicated expansion conditions, and the
6841 string was silently truncated, leading to an expansion error. It turns out
6842 that it is easier to change to an unlimited length (owing to other changes
6843 that have happened since this code was originally written) than to build
6844 structure for giving a limitation error. The length of the item that
6845 expands into the list of hosts is now unlimited.
6847 47. The lsearch lookup could not handle data where the length of text line was
6848 more than 4095 characters. Such lines were truncated, leading to shortened
6849 data being returned. It should now handle lines of any length.
6851 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6852 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6855 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6856 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6857 no longer happens in comment lines. A list of replacements is now placed
6858 at the head of all of the source files, except those whose only change is
6859 to replace PERL_COMMAND in the very first #! line.
6861 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6862 messages on the queue, with a bottom-up merge sort, using code contributed
6863 by Michael Haardt. This should make operations like -bp somewhat faster on
6864 large queues. It won't affect queue runners, except when queue_run_in_order
6867 51. Installed eximstats 1.31 in the distribution.
6869 52. Added support for SRV lookups to the dnslookup router.
6871 53. If an ACL referred to $message_body or $message_body_end, the value was not
6872 reset for any messages that followed in the same SMTP session.
6874 54. The store-handling optimization for building very long strings was not
6875 differentiating between the different store pools. I don't think this
6876 actually made any difference in practice, but I've tidied it.
6878 55. While running the routers to verify a sender address, $sender_address
6879 was still set to the sender address. This is wrong, because when routing to
6880 send a bounce to the sender, it would be empty. Therefore, I have changed
6881 it so that, while verifying a sender address, $sender_address is set to <>.
6882 (There is no change to what happens when verifying a recipient address.)
6884 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6885 target A or AAAA records (if not already returned) without resetting the
6886 qualify_single or search_parents options of the DNS resolver. These are
6887 inappropriate in this case because the targets of MX and SRV records must
6888 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6889 target that, when qualified, matched something in the local domain. These
6890 two options are now turned off when doing these lookups.
6892 57. It seems that at least some releases of Reiserfs (which does not have the
6893 concept of a fixed number of inodes) returns zero and not -1 for the
6894 number of available inodes. This interacted badly with check_spool_inodes,
6895 which assumed that -1 was the "no such thing" setting. What I have done is
6896 to check that the total number of inodes is greater than zero before doing
6897 the test of how many are available.
6899 58. When a "warn" ACL statement has a log_message modifier, the message is
6900 remembered, and not repeated. This is to avoid a lot of repetition when a
6901 message has many recipients that cause the same warning to be written.
6902 However, Exim was preserving the list of already written lines for an
6903 entire SMTP session, which doesn't seem right. The memory is now reset if a
6904 new message is started.
6906 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6907 debugging output unless log_rewrite was also set.
6909 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6910 of (int)(handle) when we know that handle contains (void *)(-1).
6912 61. The Exim daemon panic-logs an error return when it closes the incoming
6913 connection. However "connection reset by peer" seems to be common, and
6914 isn't really an error worthy of noting specially, so that particular error
6917 62. When Exim is trying to find all the local interfaces, it used to panic and
6918 die if the ioctl to get the interface flags failed. However, it seems that
6919 on at least one OS (Solaris 9) it is possible to have an interface that is
6920 included in the list of interfaces, but for which you get a failure error
6921 for this call. This happens when the interface is not "plumbed" into a
6922 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6923 failure of the "get flags" call assumes that the interface is down.
6925 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6926 makes life easier for people who are doing arithmetic on fields extracted
6927 from dates, where you often get leading zeros that should not be
6928 interpreted as octal.
6930 64. Added qualify_domain to the redirect router, to override the global
6933 65. If a pathologically long header line contained very many addresses (the
6934 report of this problem mentioned 10 000) and each of them was rewritten,
6935 Exim could use up a very large amount of memory. (It kept on making new
6936 copies of the header line as it rewrote, and never released the old ones.)
6937 At the expense of a bit more processing, the header rewriting function has
6938 been changed so that it no longer eats memory in this way.
6940 66. The generation of the Received: header has been moved from the time that a
6941 message starts to be received, to the time that it finishes. The timestamp
6942 in the Received: header should now be very close to that of the <= log
6943 line. There are two side-effects of this change:
6945 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6946 logged header lines no longer include the local Received: line, because
6947 it has not yet been created. The same applies to a copy of the message
6948 that is returned to a non-SMTP sender when a message is rejected.
6950 (b) When a filter file is tested using -bf, no additional Received: header
6951 is added to the test message. After some thought, I decided that this
6954 This change does not affect the value of $received_for. It is still set
6955 after address rewriting, but before local_scan() is called.
6957 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6959 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6960 gave an unhelpful panic error message, and a defer error. I have managed to
6961 change this behaviour so that it now rejects any supplied certificate,
6962 which seems right, as the list of acceptable certificates is empty.
6964 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6965 gave an unhelpful defer error. I have not managed to make this reject any
6966 supplied certificates, but the error message it gives is "no certificate
6967 supplied", which is not helpful.
6969 70. exigrep's output now also includes lines that are not associated with any
6970 message, but which match the given pattern. Implemented by a patch from
6971 Martin Sluka, which also tidied up the Perl a bit.
6973 71. Recipient callout verification, like sender verification, was using <> in
6974 the MAIL FROM command. This isn't really the right thing, since the actual
6975 sender may affect whether the remote host accepts the recipient or not. I
6976 have changed it to use the actual sender in the callout; this means that
6977 the cache record is now keyed on a recipient/sender pair, not just the
6978 recipient address. There doesn't seem to be a real danger of callout loops,
6979 since a callout by the remote host to check the sender would use <>.
6980 [SEE ABOVE: changed after hitting problems.]
6982 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6983 temporary errors. However, in the case of such a code being given after
6984 the end of a data transmission (i.e. after ".") Exim was failing to write
6985 a retry record for the message. (Yes, there was some broken host that was
6986 actually sending 8xx at this point.)
6988 73. An unknown lookup type in a host list could cause Exim to panic-die when
6989 the list was checked. (An example that provoked this was putting <; in the
6990 middle of a list instead of at the start.) If this happened during a DATA
6991 ACL check, a -D file could be left lying around. This kind of configuration
6992 error no longer causes Exim to die; instead it causes a defer error. The
6993 incident is still logged to the main and panic logs.
6995 74. Buglet left over from Exim 3 conversion. The message "too many messages
6996 in one connection" was written to the rejectlog but not the mainlog, except
6997 when address rewriting (yes!) was being logged.
6999 75. Added write_rejectlog option.
7001 76. When a system filter was run not as root (that is, when system_filter_user
7002 was set), the values of the $n variables were not being returned to the
7003 main process; thus, they were not subsequently available in the $sn
7006 77. Added +return_path_on_delivery log selector.
7008 78. A connection timeout was being treated differently from recipients deferred
7009 when testing hosts_max_try with a message that was older than the host's
7010 retry timeout. (The host should not be counted, thus allowing all hosts to
7011 be tried at least once before bouncing.) This may have been the cause of an
7012 occasionally reported bug whereby a message would remain on the queue
7013 longer than the retry timeout, but would be bounced if a delivery was
7014 forced. I say "may" because I never totally pinned down the problem;
7015 setting up timeout/retry tests is difficult. See also the next item.
7017 79. The ultimate address timeout was not being applied to errors that involved
7018 a combination of host plus message (for example, a timeout on a MAIL
7019 command). When an address resolved to a number of possible hosts, and they
7020 were not all tried for each delivery (e.g. because of hosts_max_try), a
7021 message could remain on the queue longer than the retry timeout.
7023 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7026 81. Fixed an obscure SMTP outgoing bug which required at least the following
7027 conditions: (a) there was another message waiting for the same server;
7028 (b) the server returned 5xx to all RCPT commands in the first message so
7029 that the message was not completed; (c) the server dropped the connection
7030 or gave a negative response to the RSET that Exim sends to abort the
7031 transaction. The observed case was a dropped connection after DATA that had
7032 been sent in pipelining mode. That is, the server had advertised PIPELINING
7033 but was not implementing it correctly. The effect of the bug was incorrect
7034 behaviour, such as trying another host, and this could lead to a crash.
7040 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7041 and daemon.c were passed as pointers to ints; they should have been
7042 pointers to socklen_t variables (which are typically unsigned ints).
7044 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7047 3. Fixed a really odd bug that affected only the testing scheme; patching a
7048 certain fixed string in the binary changed the value of another string that
7049 happened to be identical to the end of the original first string.
7051 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7052 name", it returns that address as the IP address. On some operating
7053 systems (e.g. Solaris), it also passes back the IP address string as the
7054 "host name". However, on others (e.g. Linux), it passes back an empty
7055 string. Exim wasn't checking for this, and was changing the host name to an
7056 empty string, assuming it had been canonicalized.
7058 5. Although rare, it is permitted to have more than one PTR record for a given
7059 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7060 all the names associated with an address, because they do in Solaris.
7061 However, it seems that they do not in Linux for data that comes from the
7062 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7063 I found this out when I moved to a new Linux workstation and tried to run
7064 the Exim test suite.
7066 To get round this problem I have changed the code so that it now does its
7067 own call to the DNS to look up PTR records when searching for a host name.
7068 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7069 addresses that are only in /etc/hosts are still found.
7071 This behaviour is, however, controlled by an option called host_lookup_
7072 order, which defaults to "bydns:byaddr". If people want to use the other
7073 order, or indeed, just use one or the other means of lookup, they can
7074 specify it in this variable.
7076 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7077 some operating systems, this comes back from gethostbyaddr() as an empty
7078 string, and this is what Exim used to test for. However, it seems that in
7079 other systems, "." is yielded. Exim now tests for this case too.
7081 7. The values of check_spool_space and check_log_space are now held internally
7082 as a number of kilobytes instead of an absolute number of bytes. If a
7083 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7084 kilobyte. This means that much larger values can be stored.
7086 8. Exim monitor: an attempt to get the action menu when not actually pointing
7087 at a message produces an empty menu entitled "No message selected". This
7088 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7089 no entries in it ("Shell widget menu has zero width and/or height"). So I
7090 have added a single, blank menu entry in this case.
7092 9. Added ${quote_local_part.
7094 10. MIME decoding is now applied to the contents of Subject: header lines when
7097 11. Now that a reference to $sender_host_address automatically causes a reverse
7098 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7099 host lookup before query-style lookups in lists that might use this
7100 variable. This has therefore been abolished, and the "net-" prefix is no
7101 longer necessary for query-style lookups.
7103 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7104 have been a typo for LFLAGS, so it has been changed.
7106 13. The install script calls Exim with "-C /dev/null" in order to find the
7107 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7108 to be output. However, since Exim outputs its version number before the
7109 error, it didn't break the script. It just looked ugly. I fixed this by
7110 always allowing "-C /dev/null" if the caller is root.
7112 14. Ignore overlarge ACL variable number when reading spool file - insurance
7113 against a later release with more variables having written the file.
7115 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7116 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7117 this, as well as the form without the "IPv6" on the front.
7119 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7120 OS/Makefile-Darwin file.
7122 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7123 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7125 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7126 variable. However, some OS use ints for inodes. I've added cast to long int
7127 to get rid of the compiler warning.
7129 19. I had forgotten to lock out "/../" in configuration file names when
7130 ALT_CONFIG_PREFIX was set.
7132 20. Routers used for verification do not need to specify transports. However,
7133 if such a router generated a host list, and callout was configured, Exim
7134 crashed, because it could not find a port number from the (non-existent)
7135 transport. It now assumes port 25 in this circumstance.
7137 21. Added the -t option to exigrep.
7139 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7140 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7141 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7142 them is set, LOOKUP_LSEARCH is forced.
7144 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7146 24. Added sender and host information to the "rejected by local_scan()" log
7147 line; previously there was no indication of these.
7149 25. Added .include_if_exists.
7151 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7152 Linux. It turns out that not all file systems support this. Apparently some
7153 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7154 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7155 not supported on the file descriptor, is now ignored when Exim is trying to
7156 sync a directory. This applies only to Linux.
7158 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7160 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7161 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7164 29. Added support for maildirsize files from supplied patch (modified a bit).
7166 30. The use of :fail: followed by an empty string could lead Exim to respond to
7167 sender verification failures with (e.g.):
7169 550 Verification failed for <xxx>
7170 550 Sender verify failed
7172 where the first response line was missing the '-' that indicates it is not
7173 the final line of the response.
7175 31. The loop for finding the name of the user that called Exim had a hardwired
7176 limit of 10; it now uses the value of finduser_retries, which is used for
7177 all other user lookups.
7179 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7182 33. Exim was neglecting to zero errno before one call of strtol() when
7183 expanding a string and expecting an integer value. On some systems this
7184 resulted in spurious "integer overflow" errors. Also, it was casting the
7185 result into an int without checking.
7187 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7188 did not work. The code looks as if it has *never* worked, though it appears
7189 to have been documented since at least release 1.62. I have made it work.
7191 35. The "timeout_DNS" error in retry rules, also documented since at least
7192 1.62, also never worked. As it isn't clear exactly what this means, and
7193 clearly it isn't a major issue, I have abolished the feature by treating it
7194 as "timeout", and writing a warning to the main and panic logs.
7196 36. The display of retry rules for -brt wasn't always showing the error code
7199 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7200 timeout_connect_A, timeout_connect_MX.
7202 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7203 to the empty sender.
7205 39. The daemon was not analysing the content of -oX till after it had closed
7206 stderr and disconnected from the controlling terminal. This meant that any
7207 syntax errors were only noted on the panic log, and the return code from
7208 the command was 0. By re-arranging the code a little, I've made the
7209 decoding happen first, so such errors now appear on stderr, and the return
7210 code is 1. However, the actual setting up of the sockets still happens in
7211 the disconnected process, so errors there are still only recorded on the
7214 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7215 connections (as happens on some IP stacks) was logged at start up time as
7216 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7217 it from "IPv6 and IPv4", which means that two separate sockets are being
7220 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7221 says whether AF_INET or AF_INET6 was passed as an argument.
7223 42. Exiwhat output was messed up when time zones were included in log
7226 43. Exiwhat now gives more information about the daemon's listening ports,
7227 and whether -tls-on-connect was used.
7229 44. The "port" option of the smtp transport is now expanded.
7231 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7232 silently ignored. Now an error message is written to the main and panic
7235 46. There's a new ACL modifier called "logwrite" which writes to a log file
7236 as soon as it is encountered.
7238 47. Added $local_user_uid and $local_user_gid at routing time.
7240 48. Exim crashed when trying to verify a sender address that was being
7243 49. Exim was recognizing only a space character after ".include". It now also
7244 recognizes a tab character.
7246 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7247 extracting the relevant information from the specification. The man page no
7248 longer contains scrambled data for the -d option, and I've added a section
7249 at the front about calling Exim under different names.
7251 51. Added "extra_headers" argument to the "mail" command in filter files.
7253 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7256 53. Installed eximstats 1.29.
7258 54. Added transport_filter_timeout as a generic transport option.
7260 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7261 Cc: header lines. This was required by RFC 822, but it not required by RFC
7264 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7265 incoming messages that did not have them. Now it does so only if the
7266 message originates locally, that is, if there is no associated remote host
7267 address. When Resent- header lines are present, this applies to the Resent-
7268 lines rather than the non-Resent- lines.
7270 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7271 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7273 58. Messages for configuration errors now include the name of the main
7274 configuration file - useful now that there may be more than one file in a
7275 list (.included file names were always shown).
7277 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7278 for those rare installations that do not start the daemon as root or run it
7279 setuid root. I've cut out the call to initgroups() if the daemon is not
7282 60. The Exim user and group can now be bound into the binary as text strings
7283 that are looked up at the start of Exim's processing.
7285 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7287 62. Added $mailstore_basename variable.
7289 63. Installed patch to sieve.c from Michael Haardt.
7291 64. When Exim failed to open the panic log after failing to open the main log,
7292 the original message it was trying to log was written to stderr and debug
7293 output, but if they were not available (the usual case in production), it
7294 was lost. Now it is written to syslog before the two lines that record the
7295 failures to open the logs.
7297 65. Users' Exim filters run in subprocesses under the user's uid. It is
7298 possible for a "deliver" command or an alias in a "personal" command to
7299 provoke an address rewrite. If logging of address rewriting is configured,
7300 this fails because the process is not running as root or exim. There may be
7301 a better way of dealing with this, but for the moment (because 4.30 needs
7302 to be released), I have disabled address rewrite logging when running a
7303 filter in a non-root, non-exim process.
7309 1. The buildconfig auxiliary program wasn't quoting the value set for
7310 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7311 not defined. This bug was masked in 4.22 by the effect that was fixed in
7314 2. Some messages that were rejected after a message id was allocated were
7315 shown as "incomplete" by exigrep. It no longer does this for messages that
7316 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7318 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7319 have allow_domain_literals set, the ID did not get logged in the <= line.
7320 Domain literals are now always recognized in Message-ID: header lines.
7322 4. The first argument for a ${extract expansion item is the key name or field
7323 number. Leading and trailing spaces in this item were not being ignored,
7324 causing some misleading effects.
7326 5. When deliver_drop_privilege was set, single queue runner processes started
7327 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7328 same command in the process it spins off) were not dropping privilege.
7330 6. When the daemon running as "exim" started a queue runner, it always
7331 re-executed Exim in the spun-off process. This is a waste of effort when
7332 deliver_drop_privilege is set. The new process now just calls the
7333 queue-runner function directly.
7339 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7342 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7343 ignored. Though the use of -oP was forcing the writing of a pid file, it
7344 was always written to the default place.
7346 3. If the message "no IP address found for host xxxx" is generated during
7347 incoming verification, it is now followed by identification of the incoming
7348 connection (so you can more easily find what provoked it).
7350 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7352 5. Added some features to "harden" Exim a bit more against certain attacks:
7354 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7355 be put in Local/Makefile. This is like the never_users runtime option,
7356 but it cannot be overridden. The default setting is "root".
7358 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7359 prefix string with which any file named in a -C command line option
7362 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7363 is retained for -C and -D only if the caller of Exim is root. Without
7364 it, the exim user may also use -C and -D and retain privilege.
7366 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7367 command line option is disabled.
7369 6. Macro names set by the -D option must start with an upper case letter, just
7370 like macro names defined in the configuration file.
7372 7. Added "dereference=" facility to LDAP.
7374 8. Two instances of the typo "uknown" in the source files are fixed.
7376 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7377 the Configure-Makefile script screwed up while processing it.
7379 10. Incorporated PCRE 4.4.
7381 11. The SMTP synchronization check was not operating right at the start of an
7382 SMTP session. For example, it could not catch a HELO sent before the client
7383 waited for the greeting. There is now a check for outstanding input at the
7384 point when the greeting is written. Because of the duplex, asynchronous
7385 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7386 way, but not yet received, when the check is performed.
7388 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7389 on TCP/IP sockets, because this apparently causes some broken clients to
7392 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7393 unchanged) from the Cygwin maintainer.
7395 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7396 was supported instead of testing for mbx. Effectively a typo.
7398 15. The spa authenticator server code was not checking that the input it
7399 received was valid base64.
7401 16. The debug output line for the "set" modifier in ACLs was not showing the
7402 name of the variable that was being set.
7404 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7406 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7407 lookup on its own. Something else was needed to trigger the lookup. For
7408 example, a match in host_lookup or the need for a host name in a host list.
7409 Now, if $sender_host_name is referenced and the host name has not yet been
7410 looked up, a lookup is performed. If the lookup fails, the variable remains
7411 empty, and $host_lookup_failed is set to "1".
7413 19. Added "eqi" as a case-independent comparison operator.
7415 20. The saslauthd authentication condition could segfault if neither service
7416 nor realm was specified.
7418 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7419 error message that was logged was misleading, and incoming SMTP
7420 connections were dropped. The message is now more accurate, and temporary
7421 errors are given to SMTP connections.
7423 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7424 (except RSET) with a 421 error, until QUIT is received. However, it was
7425 failing to send a response to QUIT.
7427 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7428 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7429 ACL is now run after the helo_try_verify_hosts code.
7431 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7432 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7433 case-independent, so other case variants are also recognized). Apparently
7434 some systems use these upper case variants.
7436 25. If more than two messages were waiting for the same host, and a transport
7437 filter was specified for the transport, Exim sent two messages over the
7438 same TCP/IP connection, and then failed with "socket operation on non-
7439 socket" when it tried to send the third.
7441 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7443 27. The extern definition of crypt16() in expand.c was not being excluded when
7444 the OS had its own crypt16() function.
7446 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7447 as a preferred synonym for return_size_limit, both as an option and as an
7450 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7452 30. Changed the default configuration ACL to relax the local part checking rule
7453 for addresses that are not in any local domains. For these addresses,
7454 slashes and pipe symbols are allowed within local parts, but the sequence
7455 /../ is explicitly forbidden.
7457 31. SPA server authentication was not clearing the challenge buffer before
7460 32. log_message in a "warn" ACL statement was writing to the reject log as
7461 well as to the main log, which contradicts the documentation and doesn't
7462 seem right (because no rejection is happening). So I have stopped it.
7464 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7465 However, I am unable to do any testing of this.
7467 34. Fixed an infelicity in the appendfile transport. When checking directories
7468 for a mailbox, to see if any needed to be created, it was accidentally
7469 using path names with one or more superfluous leading slashes; tracing
7470 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7472 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7473 contents are added to the log line that is written for every discarded
7474 recipient. (Previously a log_message setting was ignored.)
7476 36. The ${quote: operator now quotes the string if it is empty.
7478 37. The install script runs exim in order to find its version number. If for
7479 some reason other than non-existence or emptiness, which it checks, it
7480 could not run './exim', it was installing it with an empty version number,
7481 i.e. as "exim-". This error state is now caught, and the installation is
7484 38. An argument was missing from the function that creates an error message
7485 when Exim fails to connect to the socket for saslauthd authentication.
7486 This could cause Exim to crash, or give a corrupted message.
7488 39. Added isip, isip4, and isip6 to ${if conditions.
7490 40. The ACL variables $acl_xx are now saved with the message, and can be
7491 accessed later in routers, transports, and filters.
7493 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7494 strings in the file are not string-expanded.
7496 42. If a MAIL command specified a SIZE value that was too large to fit into an
7497 int variable, the check against message_size_limit failed. Such values are
7498 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7499 day this will have to be increased, but I don't think I want to be around
7500 when emails are that large.
7507 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7508 iconv() is not standard in FreeBSD.
7510 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7511 IPv6 enabled. The observed symptom was a segmentation fault on return from
7512 the function os_common_find_running_interfaces() in src/os.c.
7514 3. In the check_special_case() function in daemon.c I had used "errno" as an
7515 argument name, which causes warnings on some systems. This was basically a
7516 typo, since it was named "eno" in the comments!
7518 4. The code that waits for the clock to tick (at a resolution of some fraction
7519 of a second) so as to ensure message-id uniqueness was always waiting for
7520 at least one whole tick, when it could have waited for less. [This is
7521 almost certainly not relevant at current processor speeds, where it is
7522 unlikely to ever wait at all. But we try to future-proof.]
7524 5. The function that sleeps for a time interval that includes fractions of a
7525 second contained a race. It did not block SIGALRM between setting the
7526 timer, and suspending (a couple of lines later). If the interval was short
7527 and the sigsuspend() was delayed until after it had expired, the suspension
7528 never ended. On busy systems this could lead to processes getting stuck for
7531 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7532 process, before it forks any delivery processes. The open lookup caching
7533 mechanism meant that the open file or database connection was passed into
7534 the delivery process. The problem was that delivery processes always tidy
7535 up cached lookup data. This could cause a problem for the next delivery
7536 process started by the queue runner, because the external queue runner
7537 process does not know about the closure. So the next delivery process
7538 still has data in the lookup cache. In the case of a file lookup, there was
7539 no problem because closing a file descriptor in a subprocess doesn't affect
7540 the parent. However, if the lookup was caching a connection to a database,
7541 the connection was closed, and the second delivery process was likely to
7542 see errors such as "PGSQL: query failed: server closed the connection
7543 unexpectedly". The problem has been fixed by closing all cached lookups
7544 in a queue runner before running a delivery process.
7546 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7547 seem to have the "const" qualifier which it has on other OS. I've
7550 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7551 *of the same type* (client or server) with the same public name that an
7552 error should be diagnosed.
7554 9. When Exim looked up a host name for an IP address, but failed to find the
7555 original IP address when looking up the host name (a safety check), it
7556 output the message "<ip address> does not match any IP for NULL", which was
7557 confusing, to say the least. The bug was that the host name should have
7558 appeared instead of "NULL".
7560 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7561 user that is built into the binary, and the -C or -D options is used, root
7562 privilege is dropped before the configuration file is read. In addition,
7563 logging is switched to stderr instead of the normal log files. If the
7564 configuration then re-defines the Exim user, the unprivileged environment
7565 is probably not what is expected, so Exim logs a panic warning message (but
7568 However, if deliver_drop_privilege is set, the unprivileged state may well
7569 be exactly what is intended, so the warning has been cut out in that case,
7570 and Exim is allowed to try to write to its normal log files.
7576 1. smtp_return_error_details was not giving details for temporary sender
7577 or receiver verification errors.
7579 2. Diagnose a configuration error if two authenticators have the same public
7582 3. Exim used not to create the message log file for a message until the first
7583 delivery attempt. This could be confusing when incoming messages were held
7584 for policy or load reasons. The message log file is now created at the time
7585 the message is received, and an initial "Received" line is written to it.
7587 4. The automatically generated man page for command line options had a minor
7588 bug that caused no ill effects; however, a more serious problem was that
7589 the procedure for building the man page automatically didn't always
7590 operate. Consequently, release 4.20 contains an out-of-date version. This
7591 shouldn't happen again.
7593 5. When building Exim with embedded Perl support, the script that builds the
7594 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7595 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7597 6. The freeze_tell option was not being used for messages that were frozen on
7598 arrival, either by an ACL or by local_scan().
7600 7. Added the smtp_incomplete_transaction log selector.
7602 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7603 was accepting AUTH without a new EHLO.
7605 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7606 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7609 10. Logging of TCP/IP connections (when configured) now happens in the main
7610 daemon process instead of the child process, so that the TCP/IP connection
7611 count is more accurate (but it can never be perfect).
7613 11. The use of "drop" in a nested ACL was not being handled correctly in the
7614 outer ACL. Now, if condition failure induced by the nested "drop" causes
7615 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7616 or "require"), the connection is dropped.
7618 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7619 that yield "discard" can now be used with an "accept" or a "discard" verb,
7620 but an error is generated for any others (because I can't see a useful way
7621 to define what should happen).
7623 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7624 are now processed in the same way as lines in the Exim configuration file.
7625 In particular, continuation lines are supported.
7627 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7629 15. Added -ti meaning -t -i.
7631 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7632 domains, and warn by logging if others are found.
7634 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7635 returned from GIFCONF when Exim is trying to find the list of interfaces on
7636 a host. The code in os.c has been modified to copy each ifreq to an aligned
7637 structure in all cases.
7639 Also, in some cases, the returned ifreq's were being copied to a 'struct
7640 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7641 means the last couple of bytes of an IPv6 address could be chopped if the
7642 ifreq contained only a normal sockaddr (14 bytes storage).
7644 18. Named domain lists were not supported in the hosts_treat_as_local option.
7645 An entry such as +xxxx was not recognized, and was treated as a literal
7648 19. Ensure that header lines added by a DATA ACL are included in the reject log
7649 if the ACL subsequently rejects the message.
7651 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7652 MD5 (which is deprecated).
7654 21. When testing a filter file using -bf, Exim was writing a message when it
7655 took the sender from a "From " line in the message, but it was not doing so
7656 when it took $return_path from a Return-Path: header line. It now does.
7658 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7659 with a valid header line field name (a series of printing characters
7660 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7662 23. Changed "disc" in the source to "disk" to conform to the documentation and
7663 the book and for uniformity.
7665 24. Ignore Sendmail's -Ooption=value command line item.
7667 25. When execve() failed while trying to run a command in a pipe transport,
7668 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7669 could be confused with a return value of 69 from the command itself. This
7670 has been changed to 127, the value the shell returns if it is asked to run
7671 a non-existent command. The wording for the related log line suggests a
7672 non-existent command as the problem.
7674 26. If received_header_text expands to an empty string, do not add a Received:
7675 header line to the message. (Well, it adds a token one on the spool, but
7676 marks it "old" so that it doesn't get used or transmitted.)
7678 27. Installed eximstats 1.28 (addition of -nt option).
7680 28. There was no check for failure on the call to getsockname() in the daemon
7681 code. This can fail if there is a shortage of resources on the system, with
7682 ENOMEM, for example. A temporary error is now given on failure.
7684 29. Contrary to the C standard, it seems that in some environments, the
7685 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7686 program. Exim now does this explicitly; it affects the formatting of
7687 timestamps using strftime().
7689 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7690 complaints. I've now initialized all the variables, to avoid this.
7692 32. Header lines added by a system filter were not being "seen" during
7693 transport-time rewrites.
7695 33. The info_callback() function passed to OpenSSL is set up with type void
7696 (*)(SSL *, int, int), as described somewhere. However, when calling the
7697 function (actually a macro) that sets it up, the type void(*)() is
7698 expected. I've put in a cast to prevent warnings from picky compilers.
7700 34. If a DNS black list lookup found a CNAME record, but there were no A
7701 records associated with the domain it pointed at, Exim crashed.
7703 35. If a DNS black list lookup returned more than one A record, Exim ignored
7704 all but the first. It now scans all returned addresses if a particular IP
7705 value is being sought. In this situation, the contents of the
7706 $dnslist_value variable are a list of all the addresses, separated by a
7709 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7710 to accept a host name and all its aliases if the forward lookup for any of
7711 them yielded the IP address of the incoming connection. Now it accepts only
7712 those names whose forward lookup yields the correct IP address. Any other
7713 names are discarded. This closes a loophole whereby a rogue DNS
7714 administrator could create reverse DNS records to break through a
7715 wildcarded host restriction in an ACL.
7717 37. If a user filter or a system filter that ran in a subprocess used any of
7718 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7719 the wrong values were passed to the pipe command ($thisaddress had the
7720 value of $0, $0 had the value of $1, etc). This bug was introduced by
7721 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7723 38. Improved the line breaking for long SMTP error messages from ACLs.
7724 Previously, if there was no break point between 40 and 75 characters, Exim
7725 left the rest of the message alone. Two changes have been made: (a) I've
7726 reduced the minimum length to 35 characters; (b) if it can't find a break
7727 point between 35 and 75 characters, it looks ahead and uses the first one
7728 that it finds. This may give the occasional overlong line, but at least the
7729 remaining text gets split now.
7731 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7732 file descriptors might be low, and that setting 1000 would always raise it.
7733 It turns out that in some environments, the limit is already over 1000 and
7734 that lowering it causes trouble. So now Exim takes care not to decrease it.
7736 40. When delivering a message, the value of $return_path is set to $sender_
7737 address at the start of routing (routers may change the value). By an
7738 oversight, this default was not being set up when an address was tested by
7739 -bt or -bv, which affected the outcome if any router or filter referred to
7742 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7743 log only when "message" or "log_message" are set. However, if one of the
7744 conditions was an address verification, or a call to a nested ACL, the
7745 messages generated by the underlying test were being passed through. This
7746 no longer happens. The underlying message is available in $acl_verify_
7747 message for both "message" and "log_message" expansions, so it can be
7748 passed through if needed.
7750 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7751 new expansion $bh_ to give the encoded byte string without charset
7752 translation. Translation happens only if iconv() is available; HAVE_ICONV
7753 indicates this at build time. HEADERS_CHARSET gives the charset to
7754 translate to; headers_charset can change it in the configuration, and
7755 "headers charset" can change it in an individual filter file.
7757 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7758 that creates RFC 2047 encoded "words" labels them as that charset instead
7759 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7760 expansion operator; (ii) when Exim creates a From: line for a local
7761 message; (iii) when a header line is rewritten to include a "phrase" part.
7763 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7764 buggy, causing it to skip the first lines of messages whose message ID
7765 ended in 'D'. This would not have bitten before Exim release 4.14, because
7766 message IDs were unlikely to end in 'D' before then. The effect was to have
7767 incorrect size information for certain domains.
7769 45. #include "config.h" was missing at the start of the crypt16.c module. This
7770 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7773 46. If there was a timeout during a "random" callout check, Exim treated it as
7774 a failure of the random address, and carried on sending RSET and the real
7775 address. If the delay was just some slowness somewhere, the response to the
7776 original RCPT would be taken as a response to RSET and so on, causing
7777 mayhem of various kinds.
7779 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7780 when I implemented it. It didn't allow for the fact that some option values
7781 may legitimately be negative (e.g. size_addition), and it didn't even do
7782 the right test for positive values.
7784 48. Domain names in DNS records are case-independent. Exim always looks them up
7785 in lower case. Some resolvers return domain names in exactly the case they
7786 appear in the zone file, that is, they may contain uppercase letters. Not
7787 all resolvers do this - some return always lower case. Exim was treating a
7788 change of case by a resolver as a change of domain, similar to a widening
7789 of a domain abbreviation. This triggered its re-routing code and so it was
7790 trying to route what was effectively the same domain again. This normally
7791 caused routing to fail (because the router wouldn't handle the domain
7792 twice). Now Exim checks for this case specially, and just changes the
7793 casing of the domain that it ultimately uses when it transmits the message
7796 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7799 50. If a filter generated a file delivery with a non-absolute name (possible if
7800 no home directory exists for the router), the forbid_file option was not
7803 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7804 the existing equality matching.
7806 52. Exim was using ints instead of ino_t variables in some places where it was
7807 dealing with inode numbers.
7809 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7810 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7811 called TMPDIR, and if it finds it is different, it changes its value.
7813 54. The smtp_printf() function is now made available to local_scan() so
7814 additional output lines can be written before returning. There is also an
7815 smtp_fflush() function to enable the detection of a dropped connection.
7816 The variables smtp_input and smtp_batched_input are exported to
7819 55. Changed the default runtime configuration: the message "Unknown user"
7820 has been removed from the ACL, and instead placed on the localuser router,
7821 using the cannot_route_message feature. This means that any verification
7822 failures that generate their own messages won't get overridden. Similarly,
7823 the "Unrouteable address" message that was in the ACL for unverifiable
7824 relay addresses has also been removed.
7826 56. Added hosts_avoid_esmtp to the smtp transport.
7828 57. The exicyclog script was not checking for the esoteric option
7829 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7830 will work only if exicyclog is run under the appropriate euid.
7832 58. Following a discussion on the list, the rules by which Exim recognises line
7833 endings on incoming messages have been changed. The -dropcr and drop_cr
7834 options are now no-ops, retained only for backwards compatibility. The
7835 following line terminators are recognized: LF CRLF CR. However, special
7836 processing applies to CR:
7838 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7839 nor a local message in the state where . is a terminator.
7841 (ii) If a bare CR is encountered in a header line, an extra space is added
7842 after the line terminator so as not to end the header. The reasoning
7843 behind this is that bare CRs in header lines are most likely either
7844 to be mistakes, or people trying to play silly games.
7846 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7847 was being incorrectly given as 18 bytes larger than it should have been.
7848 This is a VOB (very old bug).
7850 60. This may never have affected anything current, but just in case it has:
7851 When the local host is found other than at the start of a list of hosts,
7852 the local host, those with the same MX, and any that follow, are discarded.
7853 When the list in question was part of a longer list of hosts, the following
7854 hosts (not currently being processed) were also being discarded. This no
7855 longer happens. I'm not sure if this situation could ever has previously
7858 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7861 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7862 header. This is something that is recommended in a new Internet Draft, and
7863 is something that is documented as being done by Sendmail. There are two
7864 possible values. For messages generated by the autoreply transport, Exim
7867 Auto-Submitted: auto-replied
7869 whereas for all other generated messages (e.g. bounces) it adds
7871 Auto-Submitted: auto-generated
7873 63. The "personal" condition in filters now includes a test for the
7874 Auto-Submitted: header. If it contains the string "auto-" the message it
7875 not considered personal.
7877 64. Added rcpt_include_affixes as a generic transport option.
7879 65. Added queue_only_override (default true).
7881 66. Added the syslog_duplication option.
7883 67. If what should have been the first header line of a message consisted of
7884 a space followed by a colon, Exim was mis-interpreting it as a header line.
7885 It isn't of course - it is syntactically invalid and should therefore be
7886 treated as the start of the message body. The misbehaviour could have
7887 caused a number of strange effects, including loss of data in subsequent
7888 header lines, and spool format errors.
7890 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7891 client host had authenticated. This control can now be exercised by an ACL
7892 for more flexibility.
7894 69. By default, callouts do not happen when testing with -bh. There is now a
7895 variant, -bhc, which does actually run the callout code, including
7896 consulting and updating the callout cache.
7898 70. Added support for saslauthd authentication, courtesy of Alexander
7901 71. If statvfs() failed on the spool or log directories while checking their
7902 size for availability, Exim confusingly gave the error "space shortage".
7903 Furthermore, in debugging mode it crashed with a floating point exception.
7904 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7905 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7906 serious problem, Exim now writes to the main and panic logs when this
7907 happens, with details of the failure. It then refuses to accept the
7908 incoming message, giving the message "spool directory problem" or "log
7909 directory problem" with a 421 code for SMTP messages.
7911 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7912 0, 1, and 2 exist, because some OS complain for execs without them (see
7913 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7914 descriptors. However, the code omitted to check that the open succeeded,
7915 causing mysterious errors if for some reason the permissions on /dev/null
7916 got screwed. Now Exim writes a message to the main and panic logs, and
7917 bombs out if it can't open /dev/null.
7919 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7920 interact so that it is all more flexible. It is supposed to remain
7921 backwards compatible. Also added extra_local_interfaces.
7923 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7924 to bomb out with an assertion failure - to the client this appears as a
7925 connection drop. This problem occurs in the part of the code that was taken
7926 from the Samba project. Fortunately, the assertion is in a very simple
7927 function, so I have fixed this by reproducing the function inline in the
7928 one place where it is called, and arranging for authentication to fail
7929 instead of killing the process with assert().
7931 75. The SPA client code was not working when the server requested OEM rather
7932 than Unicode encoding.
7934 76. Added code to make require_files with a specific uid setting more usable in
7935 the case where statting the file as root fails - usually a non-root-mounted
7936 NFS file system. When this happens and the failure is EACCES, Exim now
7937 forks a subprocess and does the per-uid checking as the relevant uid.
7939 77. Added process_log_path.
7941 78. If log_file_path was not explicitly set, a setting of check_log_space or
7942 check_log_inodes was ignored.
7944 79. If a space check for the spool or log partitions fails, the incident is now
7945 logged. Of course, in the latter case the data may get lost...
7947 80. Added the %p formatting code to string_format() so that it can be used to
7948 print addresses in debug_print(). Adjusted all the address printing in the
7949 debugging in store.c to use %p rather than %d.
7951 81. There was a concern that a line of code in smtp_in.c could overflow a
7952 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7953 initially expressed, the concern was not well-founded, because trailing
7954 spaces are removed early. However, if the trailing spaces were followed by
7955 a NULL, they did not get removed, so the overflow was possible. Two fixes
7958 (a) I re-wrote the offending code in a cleaner fashion.
7959 (b) If an incoming SMTP command contains a NULL character, it is rejected
7962 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7963 runs initgroups(), so that if the Exim user is in any additional groups,
7964 they will be used during message reception.
7970 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob