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.
187 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
189 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
192 PP/08 Change default for recipients_max from unlimited to 50,000.
194 PP/09 Fix security issue with too many recipients on a message (to remove a
195 known security problem if someone does set recipients_max to unlimited,
196 or if local additions add to the recipient list).
197 Fixes CVE-2020-RCPTL reported by Qualys.
203 JH/01 Avoid costly startup code when not strictly needed. This reduces time
204 for some exim process initialisations. It does mean that the logging
205 of TLS configuration problems is only done for the daemon startup.
207 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
209 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
210 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
213 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
214 DKIM signing is being done. Previously a transport_filter would always
215 disable CHUNKING, falling back to traditional DATA.
217 JH/05 Regard command-line receipients as tainted.
219 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
221 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
222 PAM library frees one of the arguments given to it, despite the
223 documentation. Therefore a plain malloc must be used.
225 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
226 on-stack buffers were used, resulting in a taint trap when DSN information
227 copied from a received message was written into the buffer.
229 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
230 the ordering of its ARC headers. This caused a crash.
232 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
233 a new record was being constructed with information from the peer, a trap
236 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
237 installation would get error messages from DMARC verify, when it hit the
238 nonexistent file indicated by the default. Distros wanting DMARC enabled
239 should both provide the file and set the option.
240 Also enforce no DMARC verification for command-line sourced messages.
242 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
243 could, depending on the platform, hang at the STARTTLS response.
245 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
246 message on a connection. Previously if one message had ARC headers and
247 the following one did not, a crash could result when adding an
248 Authentication-Results: header.
250 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
251 Exim main code and Exim-related utities. The introduction of taint
252 tracking also did many adjustments to string handling. Since then, eximon
253 frequently terminated with an assert failure.
255 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
256 check for 452 responses. This slightly helps the inefficieny of doing
257 a large alias-expansion into a recipient-limited target. The max_rcpt
258 transport option still applies (and at the current default, will override
259 the new feature). The check is done for either cause of synch, and forces
260 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
261 connection. The new facility is not tunable at this time.
263 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
264 library live data was being used, so the results became garbage. Make
265 copies while it is still usable.
267 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
268 on delivery deferred (==) and failed (**) lines (if a delivery was
269 attemtped). Previously it was only on completion (=>) lines.
271 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
272 for the expansion of the server_scram_iter and server_scram_salt options.
274 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
275 are now specifically given a NO_DATA response without hitting the system
276 resolver. The library goes on to do the now-standard TXT lookup.
277 Use of dnsdb lookups is not affected.
279 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
280 only retrieve the errormessage once. Previously two calls to dlerror()
281 were used, and the second one (for mainlog/paniclog) retrieved null
284 JH/20 Taint checking: disallow use of tainted data for
285 - the appendfile transport file and directory options
286 - the pipe transport command
287 - the autoreply transport file, log and once options
288 - file names used by the redirect router (including filter files)
290 - paths used by single-key lookups
291 Previously this was permitted.
293 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
294 adjusted the size of a major service buffer; this failed because the
295 buffer was in use at the time. Change to a compile-time increase in the
296 buffer size, when this authenticator is compiled into exim.
298 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
299 previous fast-mode was untenable in the face of glibs using mmap to
300 support larger malloc requests.
302 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
303 New values supported, if defined on system where compiled:
304 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
305 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
307 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
308 running a limited number of proceses in parallel, a benefit is gained. The
309 amount varies with the platform hardware and load. The use of the option
310 queue_run_in_order means we cannot do this, as ordering becomes
313 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
314 had introduced a string-copy (for ensuring NUL-termination) which was not
315 appropriate for that case, which can include embedded NUL bytes in the
316 block of data. Investigation showed the copy to actually be needless, the
317 data being length-specified.
319 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
320 done during a receiving connection, and both used TLS, global info was
321 used rather than per-connection info for tracking the state of data
322 queued for transmission. This could result in a connection hang.
324 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
325 Previously, when delivering serveral messages down a single connection
326 only the first would provide a SIZE. This was due to the size information
327 not being properly tracked.
329 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
330 TAI (at 37 seconds currently), pretend to be in UTC for time-related
331 expansion and logging. Previously, spurious values such as a future
332 minute could be seen.
334 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
335 it could crash from a null-deref. This could also affect the
336 ${addresses: } operator and ${readsock } item.
338 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
339 message following a mime one, the variable was not reset.
341 JH/30 When an pipelined-connect fails at the first response, assume incorrect
342 cached capability (perhaps the peer reneged?) and immediately retry in
345 JH/31 Fix spurious detection of timeout while writing to transport filter.
347 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
348 an attempt to copy the string was made before checking it.
350 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
351 taint of the lookup key was maintained; we now regard the presence in the
352 filesystem as sufficient validation.
354 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
355 argument is supplied.
357 JH/35 The dsearch lookup now requires that the directory is an absolute path.
358 Previously this was not checked, and nonempty relative paths made an
359 access under Exim's current working directory.
361 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
362 Previously no event was raised.
364 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
365 parameter supplied by the sender MAIL FROM command. Previously it was
366 ignored, and only the check_spool_space option value for the required
369 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
370 the size of the signing public-key. Previously it was instead giving
371 the size of the signature hash.
373 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
374 the default. See the (new) dkim_verify_min_keysizes option.
376 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
377 and an ACL use a lookup for checking either the local_part or domain,
378 stale data could be accessed. Ensure that variable references are
379 dropped between messages.
381 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
382 by the client was not checked as pointing within response data before
383 being used. A malicious client could thus cause an out-of-bounds read and
384 possibly gain authentication. Fix by adding the check.
386 JH/42 Internationalisation: change the default for downconversion in the smtp
387 transport to be "if needed". Previously it was "as previously set" for
388 the message, which usually meant "if needed" for message-submission but
389 "no" for everything else. However, MTAs have been seen using SMTPUTF8
390 even when the envelope addresses did not need it, resulting in forwarding
391 failures to non-supporting MTAs. A downconvert in such cases will be
392 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
393 transport. The change does mean that addresses needing conversion will
394 be converted when previously a delivery failure would occur.
396 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
397 response was received it would be used unchecked in a fail-DSN, violating
398 standards on line-length limits. Truncate if needed.
400 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
401 doesn't work. (Additionally add a new main config option to configure the
408 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
409 side, to decode a TLS 1.3 packet capture.
411 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
412 Previously the default library behaviour applied, sending two, each in
415 JH/03 Debug output for ACL now gives the config file name and line number for
418 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
420 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
422 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
423 buffer overrun for (non-chunking) other transports.
425 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
426 TLS1.3, means that a server rejecting a client certificate is not visible
427 to the client until the first read of encrypted data (typically the
428 response to EHLO). Add detection for that case and treat it as a failed
429 TLS connection attempt, so that the normal retry-in-clear can work (if
430 suitably configured).
432 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
433 and/or domain. Found and fixed by Jason Betts.
435 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
436 configuration). If a CNAME target was not a wellformed name pattern, a
439 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
440 the OS reports them interleaved with other addresses.
442 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
443 used both for input and for a verify callout, both encrypted, SMTP
444 responses being sent by the server could be lost. This resulted in
445 dropped connections and sometimes bounces generated by a peer sending
448 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
449 string. Previously it was possible to cause undefined behaviour in a
450 library routine (usually a crash). Found by "zerons".
452 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
455 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
456 API was removed, so update to use the newer ones.
458 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
459 any timeout set, is taking a long time. Previously we would hang on to a
460 rotated logfile "forever" if the input was arriving with long gaps
461 (a previous attempt to fix addressed lack, for a long time, of initial
464 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
465 shared (NFS) environment. The length of the tempfile name is now
466 4 + 16 ("hdr.$message_exim_id") which might break on file
467 systems which restrict the file name length to lower values.
470 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
471 shared (NFS) environment.
473 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
474 did for all versions <4.90). Notably -M, -m, --invert, -I may be
477 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
478 on some platforms for bit 31.
480 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
481 to changes apparently associated with TLS1.3 handling some of the APIs
482 previously used were either nonfunctional or inappropriate. Strings
483 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
484 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
485 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
486 This affects log line X= elements, the $tls_{in,out}_cipher variables,
487 and the use of specific cipher names in the encrypted= ACL condition.
489 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
491 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
492 verification result was not updated unless hosts_require_ocsp applied.
494 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
495 queue_list_requires_admin set to false, non-admin users were denied the
498 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
499 directory-of-certs mode. Previously they were advertised despite the
502 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
503 A single TCP connection by a client will now hold a TLS connection open
504 for multiple message deliveries, by default. Previously the default was to
507 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
508 default. If built with the facility, DANE will be used. The facility
509 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
511 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
512 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
513 must be defined and you must still, unless you define DISABLE_TLS, manage
514 the the include-dir and library-file requirements that go with that
515 choice. Non-TLS builds are still supported.
517 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
520 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
521 default. If the platform supports and has the facility enabled, it will
522 be requested on all coneections.
524 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
525 controlled by the build-time option SUPPORT_PIPE_CONNECT.
527 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
529 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
530 success-DSN messages. Previously the From: header was always the default
531 one for these; the option was ignored.
533 JH/28 Fix the timeout on smtp response to apply to the whole response.
534 Previously it was reset for every read, so a teergrubing peer sending
535 single bytes within the time limit could extend the connection for a
536 long time. Credit to Qualsys Security Advisory Team for the discovery.
538 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
539 delivery address, which leaked information of the results of local
540 forwarding. Change to the original envelope recipient address, per
543 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
544 requested. Previously not bounce was generated and a log entry of
545 error ignored was made.
547 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
549 JH/32 Introduce a general tainting mechanism for values read from the input
550 channel, and values derived from them. Refuse to expand any tainted
551 values, to catch one form of exploit.
553 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
554 was unused and the unexpanded text used for the test. Found and
555 fixed by Ruben Jenster.
557 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
558 an attempt to use a TLS library read routine dereffed a nul pointer,
561 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
562 them in our smtp response.
564 JH/36 Have the general router option retry_use_local_part default to true when
565 any of the restrictive preconditions are set (to anything). Previously it
566 was only for check_local user. The change removes one item of manual
567 configuration which is required for proper retries when a remote router
568 handles a subset of addresses for a domain.
570 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
571 link count into consideration.
573 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
574 caused the extension of big_buffer, the following lines were ignored.
576 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
577 accordance with RFC 2308. Previously there was no expiry, so a longlived
578 receive process (eg. due to ACL delays) versus a short SOA value could
581 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
583 JH/39 Promote DMARC support to mainline.
585 JH/40 Bug 2452: Add a References: header to DSNs.
587 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
588 parameters. The relevant library call is documented as "Deprecated: This
589 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
590 3.6.0, DH parameters are negotiated following RFC7919."
592 HS/06 Change the default of dnssec_request_domains to "*"
594 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
595 carried on and emitted a BDAT command, even when PIPELINING was not
598 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
599 buffer was used for the filename, resulting in a trap when tainted
600 arguments (eg. $domain) were used.
602 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
603 recommended to avoid a possible server-load attack. The feature can be
604 re-enabled via the openssl_options main cofiguration option.
606 JH/45 local_scan API: documented the current smtp_printf() call. This changed
607 for version 4.90 - adding a "more data" boolean to the arguments.
608 Bumped the ABI version number also, this having been missed previously;
609 release versions 4.90 to 4.92.3 inclusive were effectively broken in
610 respect of usage of smtp_printf() by either local_scan code or libraries
611 accessed via the ${dlfunc } expansion item. Both will need coding
612 adjustment for any calls to smtp_printf() to match the new function
613 signature; a FALSE value for the new argument is always safe.
615 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
616 the file-offset (which the Linux syscall does, and exim expects); this
617 resulted in an indefinite loop.
619 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
620 to do ARC verification. The Authentication-Results: header line added
621 by the configuration then had no ARC item.
627 JH/01 Remove code calling the customisable local_scan function, unless a new
628 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
630 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
631 non-signal-safe functions being used.
633 JH/03 Bug 2269: When presented with a received message having a stupidly large
634 number of DKIM-Signature headers, disable DKIM verification to avoid
635 a resource-consumption attack. The limit is set at twenty.
637 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
638 report of oldest_pass in ${authres } in consequence, and separate out
639 some descriptions of reasons for verification fail.
641 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
642 files in the spool were present and unlocked. A queue-runner could spot
643 them, resulting in a duplicate delivery. Fix that by doing the unlock
644 after the unlink. Investigation by Tim Stewart. Take the opportunity to
645 add more error-checking on spoolfile handling while that code is being
648 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
649 No known attacks, no CVE, this is defensive hardening.
651 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
652 a queue-runner could start a delivery while other operations were ongoing.
653 Cutthrough delivery was a common victim, resulting in duplicate delivery.
654 Found and investigated by Tim Stewart. Fix by using the open message data
655 file handle rather than opening another, and not locally closing it (which
656 releases a lock) for that case, while creating the temporary .eml format
657 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
659 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
660 $sender_verify_failure/$recipient_verify_failure to "random".
662 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
665 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
666 Previously this would segfault.
668 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
671 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
672 like zero, since the resolver should be doing this for us, But we need one
673 as a CNAME but no MX presence gets the CNAME returned; we need to check
674 that doesn't point to an MX to declare it "no MX returned" rather than
675 "error, loop". A new main option is added so the older capability of
676 following some limited number of chain links is maintained.
678 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
680 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
681 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
682 now-deprecated earlier definitions used only specified the range up to TLS
683 1.2 (in the older-version library docs).
685 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
687 JH/15 Rework TLS client-side context management. Stop using a global, and
688 explicitly pass a context around. This enables future use of TLS for
689 connections to service-daemons (eg. malware scanning) while a client smtp
690 connection is using TLS; with cutthrough connections this is quite likely.
692 JH/16 Fix ARC verification to do AS checks in reverse order.
694 JH/17 Support a "tls" option on the ${readsocket } expansion item.
696 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
697 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
698 Previously the "utf8" would be re-prepended for every additional message.
700 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
701 Previously thery were accepted, resulting in issues when attempting to
702 forward messages to a non-supporting MTA.
704 PP/02 Let -n work with printing macros too, not just options.
706 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
707 one parent address was copied, and bogus data was used at delivery-logging
708 time. Either a crash (after delivery) or bogus log data could result.
709 Discovery and analysis by Tim Stewart.
711 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
712 Previously if the string ended mid-character, we did not insert the
713 promised '?' replacement.
715 PP/04 Documentation: current string operators work on bytes, not codepoints.
717 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
718 should pack well giving a smaller memory footprint so better caching and
719 therefore performance. Group the declarations where this can't be done so
720 that the byte-sized flag variables are not interspersed among pointer
721 variables, giving a better chance of good packing by the compiler.
723 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
724 non-null, to avoid issues with sites running BATV. Previously reports were
725 sent with an empty envelope sender so looked like bounces.
727 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
728 The ignore_error flag wasn't being returned from the filter subprocess so
729 was not set for later routers. Investigation and fix by Matthias Kurz.
731 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
732 and a msg:complete for the whole, when a message is manually removed using
733 -Mrm. Developement by Matthias Kurz, hacked on by JH.
735 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
736 a "Gnu special" function, asprintf() in the DB utility binary builds; I
737 hope that is portable enough.
739 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
740 requiring a known-CA anchor certificate; make it now rely entirely on the
741 TLSA as an anchor. Checking the name on the leaf cert against the name
742 on the A-record for the host is still done for TA (but not for EE mode).
744 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
745 included in delivery lines for non-proxied connections, when compiled with
746 SUPPORT_SOCKS and running with proxy logging enabled.
748 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
749 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
750 move the existing event to fire before the normal logging of message
751 failure so that custom logging is bracketed by normal logging.
753 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
754 msg:fail:internal event. Developement by Matthias Kurz.
756 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
757 far too small for todays use of crypto signatures stored there. Go all
758 the way to the max DNS message size of 64kB, even though this might be
759 overmuch for IOT constrained device use.
761 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
762 copy a string over itself. The library routine is documented as not
763 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
765 JH/32 For main options check_spool_space and check_inode_space, where the
766 platform supports 64b integers, support more than the previous 2^31 kB
767 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
768 the previous G, M, k.
770 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
771 $authenticated_fail_id variable on authentication failure. Previously
774 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
775 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
776 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
777 GNUTLS_SEC_PARAM_MEDIUM.
779 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
780 side. Previously we would continue as if no SNI had been received.
782 JH/36 Harden the handling of string-lists. When a list consisted of a sole
783 "<" character, which should be a list-separator specification, we walked
784 off past the nul-terimation.
786 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
787 causes) even when the retry time is not yet met. Previously they were
788 not, meaning that when (say) an account was over-quota and temp-rejecting,
789 and multiple senders' messages were queued, only one sender would get
790 notified on each configured delay_warning cycle.
792 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
794 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
795 cipher-suites, an error can be left on the stack even for a succeeding
796 accept; this results in impossible error messages when a later operation
799 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
800 return error codes indicating retry. Under TLS1.3 this becomes required.
802 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
803 it only wrote the new authenticators, resulting in a lack of tracking of
804 peer changes of ESMTP extensions until the next cache flush.
806 JH/41 Fix the loop reading a message header line to check for integer overflow,
807 and more-often against header_maxsize. Previously a crafted message could
808 induce a crash of the recive process; now the message is cleanly rejected.
810 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
811 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
817 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
818 When redis_servers is set to a list of > 1 element, and the Redis servers
819 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
820 case of MOVED into a DEFER case instead, thus moving the query onto the
821 next server in the list. For a cluster of N elements, all N servers must
822 be defined in redis_servers.
824 GF/02 Catch and remove uninitialized value warning in exiqsumm
825 Check for existence of @ARGV before looking at $ARGV[0]
827 JH/01 Replace the store_release() internal interface with store_newblock(),
828 which internalises the check required to safely use the old one, plus
829 the allocate and data copy operations duplicated in both (!) of the
830 extant use locations.
832 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
833 modifier. This matches the restriction on the commandline.
835 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
836 Previously only the last row was returned.
838 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
839 we assumed that tags in the header were well-formed, and parsed the
840 element content after inspecting only the first char of the tag.
841 Assumptions at that stage could crash the receive process on malformed
844 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
845 While running the DKIM ACL we operate on the Permanent memory pool so that
846 variables created with "set" persist to the DATA ACL. Also (at any time)
847 DNS lookups that fail create cache records using the Permanent pool. But
848 expansions release any allocations made on the current pool - so a dnsdb
849 lookup expansion done in the DKIM ACL releases the memory used for the
850 DNS negative-cache, and bad things result. Solution is to switch to the
851 Main pool for expansions.
852 While we're in that code, add checks on the DNS cache during store_reset,
853 active in the testsuite.
854 Problem spotted, and debugging aided, by Wolfgang Breyha.
856 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
857 When none of the hosts presented to a transport match an already-open
858 connection, close it and proceed with the list. Previously we would
859 queue the message. Spotted by Lena with Yahoo, probably involving
862 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
863 Previously a spurious "250 OK id=" response was appended to the proper
866 JH/08 The "support for" informational output now, which built with Content
867 Scanning support, has a line for the malware scanner interfaces compiled
868 in. Interface can be individually included or not at build time.
870 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
871 by the template makefile "src/EDITME". The "STREAM" support for an older
872 ClamAV interface method is removed.
874 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
875 rows affected is given instead).
877 JH/11 The runtime Berkeley DB library version is now additionally output by
878 "exim -d -bV". Previously only the compile-time version was shown.
880 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
881 SMTP connection. Previously, when one had more receipients than the
882 first, an abortive onward connection was made. Move to full support for
883 multiple onward connections in sequence, handling cutthrough connection
884 for all multi-message initiating connections.
886 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
887 routers. Previously, a multi-recipient message would fail to match the
888 onward-connection opened for the first recipient, and cause its closure.
890 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
891 a timeout on read on a GnuTLS initiating connection, resulting in the
892 initiating connection being dropped. This mattered most when the callout
893 was marked defer_ok. Fix to keep the two timeout-detection methods
896 JH/15 Relax results from ACL control request to enable cutthrough, in
897 unsupported situations, from error to silently (except under debug)
898 ignoring. This covers use with PRDR, frozen messages, queue-only and
901 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
903 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
904 metadata, resulting in a crash in free().
906 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
907 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
908 Broken also in d185889f4, with init system revamp.
910 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
911 Previously we abruptly closed the connection after reading a malware-
912 found indication; now we go on to read the "scan ok" response line,
915 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
916 ACL. Previously, a crash would result.
918 JH/19 Speed up macro lookups during configuration file read, by skipping non-
919 macro text after a replacement (previously it was only once per line) and
920 by skipping builtin macros when searching for an uppercase lead character.
922 JH/20 DANE support moved from Experimental to mainline. The Makefile control
923 for the build is renamed.
925 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
926 was allocated for every new TLS startup, meaning one per message. Fix
927 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
929 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
930 reported the original. Fix to report (as far as possible) the ACL
931 result replacing the original.
933 JH/23 Fix memory leak during multi-message connections using STARTTLS under
934 OpenSSL. Certificate information is loaded for every new TLS startup,
935 and the resources needed to be freed.
937 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
939 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
942 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
943 DATA response info to the (existing) per-recipient response info for
944 the "C=" log element. It can have useful tracking info from the
945 destination system. Patch from Simon Arlott.
947 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
948 length value. Previously this would segfault.
950 HS/02 Support Avast multiline protoocol, this allows passing flags to
951 newer versions of the scanner.
953 JH/28 Ensure that variables possibly set during message acceptance are marked
954 dead before release of memory in the daemon loop. This stops complaints
955 about them when the debug_store option is enabled. Discovered specifically
956 for sender_rate_period, but applies to a whole set of variables.
957 Do the same for the queue-runner and queue-list loops, for variables set
958 from spool message files. Do the same for the SMTP per-message loop, for
959 certain variables indirectly set in ACL operations.
961 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
962 as a multi-recipient message from a mailinglist manager). The coding had
963 an arbitrary cutoff number of characters while checking for more input;
964 enforced by writing a NUL into the buffer. This corrupted long / fast
965 input. The problem was exposed more widely when more pipelineing of SMTP
966 responses was introduced, and one Exim system was feeding another.
967 The symptom is log complaints of SMTP syntax error (NUL chars) on the
968 receiving system, and refused recipients seen by the sending system
969 (propating to people being dropped from mailing lists).
970 Discovered and pinpointed by David Carter.
972 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
973 replaced by the ${authresults } expansion.
975 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
977 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
978 allows proper process termination in container environments.
980 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
981 Previously the "final dot" had a newline after it; ensure it is CR,LF.
983 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
984 and "err_perm", deprecated since 4.83 when the RFC-defined words
985 "temperror" and "permerror" were introduced.
987 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
988 transport-filters or DKIM-signing. The restriction was lost in the
989 consolidation of verify-callout and delivery SMTP handling.
990 Extend the restriction to also cover ARC-signing.
992 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
993 in defer=pass mode supply a 450 to the initiator. Previously the message
996 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
997 tls_require_ciphers is used as before.
999 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1000 "pass_unscanned". Only tmpfails from the scanner are written to
1001 the paniclog, as they may require admin intervention (permission
1002 denied, license issues). Other scanner errors (like decompression
1003 bombs) do not cause a paniclog entry.
1005 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1006 Previously it was possible to log spurious information in receive log
1009 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1010 triggered odd behaviour from Outlook Express clients.
1012 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1015 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1016 since the IETF WG has not yet settled on that versus the original
1017 "bare" representation.
1019 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1020 Previously the millisecond value corrupted the output.
1021 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1022 corrupted the output.
1028 JH/01 Rework error string handling in TLS interface so that the caller in
1029 more cases is responsible for logging. This permits library-sourced
1030 string to be attached to addresses during delivery, and collapses
1031 pairs of long lines into single ones.
1033 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1034 during configuration. Wildcards are allowed and expanded.
1036 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1037 This permits better logging.
1039 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1040 do not close it down and have the child transport start it up again on
1041 the passed-on TCP connection. Instead, proxy the child (and any
1042 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1043 affected: the continued delivery log lines do not have any DNSSEC, TLS
1044 Certificate or OCSP information. TLS cipher information is still logged.
1046 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1047 identical IP addresses on different listening ports. Will also affect
1050 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1051 add noisy ifdef guards to special-case this sillyness.
1052 Patch from Bernd Kuhls.
1054 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1055 than 255 are no longer allowed.
1057 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1058 Disable the session-cache too, which might reduce our load. Since we
1059 currrectly use a new context for every connection, both as server and
1060 client, there is no benefit for these.
1061 GnuTLS appears to not support tickets server-side by default (we don't
1062 call gnutls_session_ticket_enable_server()) but client side is enabled
1063 by default on recent versions (3.1.3 +) unless the PFS priority string
1066 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1067 <https://reproducible-builds.org/specs/source-date-epoch/>.
1069 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1070 the check for any unsuccessful recipients did not notice the limit, and
1071 erroneously found still-pending ones.
1073 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1074 MSG_MORE. Only in-clear (not on TLS connections).
1076 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1077 transport-filter is involved we can buffer the headers in memory for
1078 creating the signature, and read the spool data file once for the
1079 signature and again for transmission.
1081 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1082 4.77 as the kernel support then wasn't solid, having issues in 64bit
1083 mode. Now, it's been long enough. Add support for FreeBSD also.
1085 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1086 case where the routing stage had gathered several addresses to send to
1087 a host before calling the transport for the first, we previously failed
1088 to close down TLS in the old transport process before passing the TCP
1089 connection to the new process. The new one sent a STARTTLS command
1090 which naturally failed, giving a failed delivery and bloating the retry
1091 database. Investigation and fix prototype from Wolfgang Breyha.
1093 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1094 false-negatives in the check that the sender had not preempted a response
1095 or prompt from Exim (running as a server), due to that code's lack of
1096 awareness of the SMTP input buffering.
1098 PP/04 Add commandline_checks_require_admin option.
1099 Exim drops privileges sanely, various checks such as -be aren't a
1100 security problem, as long as you trust local users with access to their
1101 own account. When invoked by services which pass untrusted data to
1102 Exim, this might be an issue. Set this option in main configuration
1103 AND make fixes to the calling application, such as using `--` to stop
1106 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1107 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1108 responses to those, into a single TLS record each way (this usually means
1109 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1112 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1113 affects you only if you're dancing at the edge of the param size limits.
1114 If you are, and this message makes sense to you, then: raise the
1115 configured limit or use OpenSSL 1.1. Nothing we can do for older
1118 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1119 cmdline element to get the documented default one. Previously it was
1122 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1123 are unsuable for non-message-specific reasons - eg. connection timeout,
1124 banner-time rejection.
1126 JH/16 Fix logging of delivery remote port, when specified by router, under
1129 PP/06 Repair manualroute's ability to take options in any order, even if one
1130 is the name of a transport.
1133 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1135 JH/17 Change the list-building routines interface to use the expanding-string
1136 triplet model, for better allocation and copying behaviour.
1138 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1139 Previously it was constructed the first time a possibly-matching string
1140 was met in the configuration file input during startup; now it is done
1143 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1144 compatible one, to avoid the (poorly documented) possibility of a config
1145 file in the working directory redirecting the DB files, possibly correpting
1146 some existing file. CVE-2017-10140 assigned for BDB.
1148 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1149 cache-hot. Previously, although the result was properly cached, the
1150 initial verify call returned a defer.
1152 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1153 the main verify for receipient in uncached-mode.
1155 JH/22 Retire historical build files to an "unsupported" subdir. These are
1156 defined as "ones for which we have no current evidence of testing".
1158 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1159 if present. Previously it was ignored.
1161 JH/24 Start using specified-initialisers in C structure init coding. This is
1162 a C99 feature (it's 2017, so now considered safe).
1164 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1165 if was a fixed-sized field and bitmask ops via macros; it is now more
1168 PP/07 GitHub PR 56: Apply MariaDB build fix.
1169 Patch provided by Jaroslav Škarvada.
1171 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1172 during Coverity cleanups [4.87 JH/47]
1173 Diagnosis and fix provided by Michael Fischer v. Mollard.
1175 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1176 the right size to place the terminating semicolon on its own folded
1177 line, the header hash was calculated to an incorrect value thanks to
1178 the (relaxed) space the fold became.
1180 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1181 and confused the parent.
1183 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1184 which could crash as a result. This could lead to undeliverable messages.
1186 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1189 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1190 matters on fast-turnover and PID-randomising systems, which were getting
1191 out-of-order delivery.
1193 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1194 a possibly-overlapping copy. The symptom was that "Remote host closed
1195 connection in response to HELO" was logged instead of the actual 4xx
1198 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1199 Previously only that bufferd was discarded, resulting in SYMTP command
1202 JH/32 DKIM: when a message has multiple signatures matching an identity given
1203 in dkim_verify_signers, run the dkim acl once for each. Previously only
1204 one run was done. Bug 2189.
1206 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1207 "panic the current process" to "deliberately defer". The panic log is
1208 still written with the problem list name; the mail and reject logs now
1209 get a temp-reject line for the message that was being handled, saying
1210 something like "domains check lookup or other defer". The SMTP 451
1211 message is still "Temporary local problem".
1213 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1214 A crafted sequence of BDAT commands could result in in-use memory beeing
1215 freed. CVE-2017-16943.
1217 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1218 from SMTP input. Previously it was always done; now only done for DATA
1219 and not BDAT commands. CVE-2017-16944.
1221 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1222 to the message (such as an overlong header line). Previously this was
1223 not done and we did not exit BDAT mode. Followon from the previous item
1224 though a different problem.
1230 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1231 than -2003 did; needs libidn2 in addition to libidn.
1233 JH/02 The path option on a pipe transport is now expanded before use.
1235 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1236 Patch provided by "Björn", documentation fix added too.
1238 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1239 missing a wire-to-host endian conversion.
1241 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1242 close after a BDAT command line could be taken as a following command,
1243 giving a synch failure. Fix by only checking for synch immediately
1244 before acknowledging the chunk.
1246 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1247 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1248 macro. Patches provided by Josh Soref.
1250 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1251 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1252 by IANA as a service extension. However, John Klensin suggests that we
1255 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1256 the dkim code may be unix-mode line endings rather than smtp wire-format
1257 CRLF, so prepend a CR to any bare LF.
1259 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1260 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1262 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1263 the first were themselves being wrongly included in the feed into dkim
1264 processing; with most chunk sizes in use this resulted in an incorrect
1265 body hash calculated value.
1267 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1268 DKIM signature block, for verification. Although advised against by
1269 standards it is specifically not ruled illegal.
1271 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1273 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1274 missing a body hash (the bh= tag).
1276 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1277 It seems that HAProxy sends the Proxy Protocol information in clear and
1278 only then does a TLS startup, so do the same.
1280 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1281 TCP connections (such as for Spamd) unless the daemon successfully set
1282 Fast Open mode on its listening sockets. This fixes breakage seen on
1283 too-old kernels or those not configured for Fast Open, at the cost of
1284 requiring both directions being enabled for TFO, and TFO never being used
1285 by non-daemon-related Exim processes.
1287 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1288 endings, at least on the first header line. Try to canonify any that get
1289 past that check, despite the cost.
1291 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1292 now limited to an arbitrary five deep, while parsing addresses with the
1293 strip_excess_angle_brackets option enabled.
1295 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1296 instead leave the unprompted TLS handshake in socket buffer for the
1297 TLS library to consume.
1299 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1301 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1303 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1304 region in one operation, for speed, and this leaves assigned pointers
1305 dangling. Add checks run only under the testsuite which checks all
1306 variables at a store-reset and panics on a dangling pointer; add code
1307 explicitly nulling out all the variables discovered. Fixes one known
1308 bug: a transport crash, where a dangling pointer for $sending_ip_address
1309 originally assigned in a verify callout, is re-used.
1311 PP/06 Drop '.' from @INC in various Perl scripts.
1313 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1315 PP/08 Reduce a number of compilation warnings under clang; building with
1316 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1317 should be warning-free.
1319 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1321 HS/01 Fix portability problems introduced by PP/08 for platforms where
1322 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1324 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1325 chunk. This allows us to accept broken chunked messages. We need a more
1326 general solution here.
1328 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1329 already-broken messages in the queue.
1331 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1333 JH/19 Fix reference counting bug in routing-generated-address tracking.
1339 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1340 supports it and a size is available (ie. the sending peer gave us one).
1342 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1343 years of being deprecated). The replacements are the ACLs
1344 acl_smtp_mime and acl_not_smtp_mime.
1346 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1347 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1348 or even an in-clear connection were permitted. Now, if the host lookup
1349 was dnssec and dane was requested then the host is only used if the
1350 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1351 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1352 if one fails this test.
1353 This means that a poorly-configured remote DNS will make it incommunicado;
1354 but it protects against a DNS-interception attack on it.
1356 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1357 non-noisy when a race steals the message being considered.
1359 JH/05 If main configuration option tls_certificate is unset, generate a
1360 self-signed certificate for inbound TLS connections.
1362 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1363 in rewrites and routers.
1365 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1366 and logged a warning sing 4.83; now they are a configuration file error.
1368 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1369 (lacking @domain). Apply the same qualification processing as RCPT.
1371 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1373 JH/10 Support ${sha256:} applied to a string (as well as the previous
1376 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1377 a cutthrough deliver is pending, as we always want to make a connection.
1378 This also avoids re-routing the message when later placing the cutthrough
1379 connection after a verify cache hit.
1380 Do not update it with the verify result either.
1382 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1383 when routing results in more than one destination address.
1385 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1386 signing (which inhibits the cutthrough capability). Previously only
1387 the presence of an option was tested; now an expansion evaluating as
1388 empty is permissible (obviously it should depend only on data available
1389 when the cutthrough connection is made).
1391 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1392 the relevant preceding SMTP command did not note the pipelining mode.
1394 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1395 Previously they were not counted.
1397 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1398 as one having no matching records. Previously we deferred the message
1399 that needed the lookup.
1401 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1402 distinguished as "(=".
1404 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1405 for missing MX records. Previously it only worked for missing A records.
1407 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1409 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1410 after the data-go-ahead and data-ack. Patch from Jason Betts.
1412 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1413 even for a "none" policy. Patch from Tony Meyer.
1415 JH/22 Fix continued use of a connection for further deliveries. If a port was
1416 specified by a router, it must also match for the delivery to be
1419 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1420 When one of the recipients of a message was unsuitable for the connection
1421 (has no matching addresses), we lost track of needing to mark it
1422 deferred. As a result mail would be lost.
1424 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1426 JH/25 Decoding ACL controls is now done using a binary search; the source code
1427 takes up less space and should be simpler to maintain. Merge the ACL
1428 condition decode tables also, with similar effect.
1430 JH/26 Fix problem with one_time used on a redirect router which returned the
1431 parent address unchanged. A retry would see the parent address marked as
1432 delivered, so not attempt the (identical) child. As a result mail would
1435 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1436 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1437 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1440 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1441 Main config options check_{log,spool}_{inodes,space} are now
1442 100 inodes, 10MB unless set otherwise in the configuration.
1444 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1445 Previously it only applied to the main-section connection policy
1448 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1450 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1451 by me. Added RFC7919 DH primes as an alternative.
1453 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1454 are not in the system include path.
1456 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1457 GnuTLS, when a session startup failed (eg because the client disconnected)
1458 Exim did stdio operations after fclose. This was exposed by a recent
1459 change which nulled out the file handle after the fclose.
1461 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1462 signed directly by the cert-signing cert, rather than an intermediate
1463 OCSP-signing cert. This is the model used by LetsEncrypt.
1465 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1467 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1468 an incoming connection.
1470 HS/02 Bug 1802: Do not half-close the connection after sending a request
1473 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1474 fallback to "prime256v1".
1476 JH/34 SECURITY: Use proper copy of DATA command in error message.
1477 Could leak key material. Remotely exploitable. CVE-2016-9963.
1483 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1484 and 3.4.4 - once the server is enabled to respond to an OCSP request
1485 it does even when not requested, resulting in a stapling non-aware
1486 client dropping the TLS connection.
1488 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1489 support variable-length bit vectors. No functional change.
1491 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1492 The I= interface field on outgoing lines is now after the H= remote
1493 host field, same as incoming lines. There is a separate
1494 outgoing_interface log selector which allows you to disable the
1497 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1498 If not running log_selector +smtp_connection the mainlog would be held
1499 open indefinitely after a "too many connections" event, including to a
1500 deleted file after a log rotate. Leave the per net connection logging
1501 leaving it open for efficiency as that will be quickly detected by the
1502 check on the next write.
1504 HS/01 Bug 1671: Fix post transport crash.
1505 Processing the wait-<transport> messages could crash the delivery
1506 process if the message IDs didn't exist for some reason. When
1507 using 'split_spool_directory=yes' the construction of the spool
1508 file name failed already, exposing the same netto behaviour.
1510 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1511 mime_regex ACL conditions.
1513 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1514 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1515 to HELO, local diagnostic string.
1517 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1518 log line to debug. Even when configured with a tls authenticator many
1519 client connections are expected to not authenticate in this way, so
1520 an authenticate fail is not an error.
1522 HS/02 Add the Exim version string to the process info. This way exiwhat
1523 gives some more detail about the running daemon.
1525 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1526 matter for fast-change records such as DNSBLs.
1528 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1529 retry record, even if constant. There may be multiple transports with
1530 different interface settings and the retry behaviour needs to be kept
1533 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1535 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1537 JH/10 Bug 840: fix log_defer_output option of pipe transport
1539 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1540 hosts_randomize. This matters a lot when combined with mua_wrapper.
1542 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1543 ${quote_pgsql:<string>} operator.
1545 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1547 JH/14 Change header file name for freeradius-client. Relevant if compiling
1548 with Radius support; from the Gentoo tree and checked under Fedora.
1550 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1552 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1553 option transport_filter, meaning no filtering.
1555 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1557 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1558 defaults to "*" (all hosts). The variable is now available when not built
1559 with TLS, default unset, mainly to enable keeping the testsuite sane.
1560 If a server certificate is not supplied (via tls_certificate) an error is
1561 logged, and clients will find TLS connections fail on startup. Presumably
1562 they will retry in-clear.
1563 Packagers of Exim are strongly encouraged to create a server certificate
1564 at installation time.
1566 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1567 with the $config_file variable.
1569 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1570 in transport context, after the attempt, and per-recipient. The latter type
1571 is per host attempted. The event data is the error message, and the errno
1572 information encodes the lookup type (A vs. MX) used for the (first) host,
1573 and the trailing two digits of the smtp 4xx response.
1575 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1576 to write to mainlog (or rejectlog, paniclog) in the window between file
1577 creation and permissions/ownership being changed. Particularly affects
1578 installations where exicyclog is run as root, rather than exim user;
1579 result is that the running daemon panics and dies.
1581 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1583 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1584 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1585 "pri" and "weight". Note that the previous implicit priority given by the
1586 list order is no longer honoured.
1588 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1589 for DKIM processing.
1591 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1592 by defining SUPPORT_SOCKS.
1594 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1595 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1596 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1597 variables are renamed to proxy_{local,external}_{address,port}.
1599 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1600 for a build by defining SUPPORT_I18N
1602 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1603 of the query string, and make ${quote_redis:} do that quoting.
1605 JH/29 Move Events support from Experimental to mainline, enabled by default
1606 and removable for a build by defining DISABLE_EVENT.
1608 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1610 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1611 cached by the daemon.
1613 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1614 by defining LOOKUP_REDIS. The libhiredis library is required.
1616 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1617 keys are given for lookup.
1619 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1620 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1621 only supported when built with TLS support. The PolarSSL SHA routines
1622 are still used when the TLS library is too old for convenient support.
1624 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1625 openssl_options), for security. OpenSSL forces this from version 1.1.0
1626 server-side so match that on older versions.
1628 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1629 allocation for $value could be released as the expansion processing
1630 concluded, but leaving the global pointer active for it.
1632 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1633 and to use the domains and local_parts ACL conditions.
1635 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1636 incorrectly not doubled on cutthrough transmission, hence seen as a
1637 body-termination at the receiving system - resulting in truncated mails.
1638 Commonly the sender saw a TCP-level error, and retransmitted the message
1639 via the normal store-and-forward channel. This could result in duplicates
1640 received - but deduplicating mailstores were liable to retain only the
1641 initial truncated version.
1643 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1645 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1647 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1648 we're in there, support oversigning also; bug 1309.
1650 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1652 HS/04 Add support for keep_environment and add_environment options.
1654 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1655 either intentional arithmetic overflow during PRNG, or testing config-
1658 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1659 delivery resulted in actual delivery. Cancel cutthrough before DATA
1662 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1663 rejects a recipient: pass the reject to the originator.
1665 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1666 Many were false-positives and ignorable, but it's worth fixing the
1669 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1670 for the new environment-manipulation done at startup. Move the routines
1671 from being local to tls.c to being global via the os.c file.
1673 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1674 an extract embedded as result-arg for a map, the first arg for extract
1675 is unavailable so we cannot tell if this is a numbered or keyed
1676 extraction. Accept either.
1682 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1685 JH/02 The smtp transport option "multi_domain" is now expanded.
1687 JH/03 The smtp transport now requests PRDR by default, if the server offers
1690 JH/04 Certificate name checking on server certificates, when exim is a client,
1691 is now done by default. The transport option tls_verify_cert_hostnames
1692 can be used to disable this per-host. The build option
1693 EXPERIMENTAL_CERTNAMES is withdrawn.
1695 JH/05 The value of the tls_verify_certificates smtp transport and main options
1696 default to the word "system" to access the system default CA bundle.
1697 For GnuTLS, only version 3.0.20 or later.
1699 JH/06 Verification of the server certificate for a TLS connection is now tried
1700 (but not required) by default. The verification status is now logged by
1701 default, for both outbound TLS and client-certificate supplying inbound
1704 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1707 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1708 Status Notification (bounce) messages are now MIME format per RFC 3464.
1709 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1710 under the control of the dsn_advertise_hosts option, and routers may
1711 have a dsn_lasthop option.
1713 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1714 default, modifiable by a malware= option. The list separator for
1715 the options can now be changed in the usual way. Bug 68.
1717 JH/10 The smtp_receive_timeout main option is now expanded before use.
1719 JH/11 The incoming_interface log option now also enables logging of the
1720 local interface on delivery outgoing connections.
1722 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1723 if the interface and destination host and port all match.
1725 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1728 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1729 Patch from Andrew Lewis.
1731 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1732 now supports optional time-restrictions, weighting, and priority
1733 modifiers per server. Patch originally by <rommer@active.by>.
1735 JH/16 The spamd_address main option now supports a mixed list of local
1736 and remote servers. Remote servers can be IPv6 addresses, and
1737 specify a port-range.
1739 JH/17 Bug 68: The spamd_address main option now supports an optional
1740 timeout value per server.
1742 JH/18 Bug 1581: Router and transport options headers_add/remove can
1743 now have the list separator specified.
1745 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1748 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1751 JH/21 Support for the A6 type of dns record is withdrawn.
1753 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1754 rather than the verbs used.
1756 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1757 from 255 to 1024 chars.
1759 JH/24 Verification callouts now attempt to use TLS by default.
1761 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1762 are generic router options now. The defaults didn't change.
1764 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1765 Original patch from Alexander Shikoff, worked over by JH.
1767 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1768 files if ZCAT_COMMAND is not executable.
1770 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1772 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1774 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1775 Normally benign, it bites when the pair was led to by a CNAME;
1776 modern usage is to not canonicalize the domain to a CNAME target
1777 (and we were inconsistent anyway for A-only vs AAAA+A).
1779 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1781 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1782 when evaluating $sender_host_dnssec.
1784 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1785 $sender_helo_dnssec variable.
1787 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1789 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1791 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1793 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1794 documented as working, but never had. Support all but $spam_report.
1796 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1797 added for tls authenticator.
1799 HS/03 Add perl_taintmode main config option
1805 TL/01 When running the test suite, the README says that variables such as
1806 no_msglog_check are global and can be placed anywhere in a specific
1807 test's script, however it was observed that placement needed to be near
1808 the beginning for it to behave that way. Changed the runtest perl
1809 script to read through the entire script once to detect and set these
1810 variables, reset to the beginning of the script, and then run through
1811 the script parsing/test process like normal.
1813 TL/02 The BSD's have an arc4random API. One of the functions to induce
1814 adding randomness was arc4random_stir(), but it has been removed in
1815 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1816 function when detected.
1818 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1819 cause callback expansion.
1821 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1822 syntax errors in an expansion can be treated as a string instead of
1823 logging or causing an error, due to the internal use of bool_lax
1824 instead of bool when processing it.
1826 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1827 server certificates when making smtp deliveries.
1829 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1831 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1833 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1835 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1836 Merged patch from Sebastian Wiedenroth.
1838 JH/05 Fix results-pipe from transport process. Several recipients, combined
1839 with certificate use, exposed issues where response data items split
1840 over buffer boundaries were not parsed properly. This eventually
1841 resulted in duplicates being sent. This issue only became common enough
1842 to notice due to the introduction of connection certificate information,
1843 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1845 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1846 size buffer was used, resulting in syntax errors when an expansion
1849 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1850 version 3.3.6 or later.
1852 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1853 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1854 both become "event_action", the variables become $event_name, $event_data
1855 and $event_defer_errno. There is a new variable $verify_mode, usable in
1856 routers, transports and related events. The tls:cert event is now also
1857 raised for inbound connections, if the main configuration event_action
1860 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1861 early OCSP support, but no stapling (appears to be less than 1.0.0).
1863 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1864 server certificate names available under the smtp transport option
1865 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1868 JH/10 Time-related extraction expansions from certificates now use the main
1869 option "timezone" setting for output formatting, and are consistent
1870 between OpenSSL and GnuTLS compilations. Bug 1541.
1872 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1873 encoded parameter in the incoming message. Bug 1558.
1875 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1876 include certificate info, eximon was claiming there were spoolfile
1879 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1881 JH/14 Log delivery-related information more consistently, using the sequence
1882 "H=<name> [<ip>]" wherever possible.
1884 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1885 are problematic for Debian distribution, omit them from the release
1888 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1890 JH/16 Fix string representation of time values on 64bit time_t architectures.
1893 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1894 output list separator was used.
1899 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1900 checkers that were complaining about end of non-void function with no
1903 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1904 This was a regression introduced in 4.83 by another bugfix.
1906 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1908 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1909 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1915 TF/01 Correctly close the server side of TLS when forking for delivery.
1917 When a message was received over SMTP with TLS, Exim failed to clear up
1918 the incoming connection properly after forking off the child process to
1919 deliver the message. In some situations the subsequent outgoing
1920 delivery connection happened to have the same fd number as the incoming
1921 connection previously had. Exim would try to use TLS and fail, logging
1922 a "Bad file descriptor" error.
1924 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1925 utilities have not been installed.
1927 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1928 temporary space as the ACL may create new global variables.
1930 TL/01 LDAP support uses per connection or global context settings, depending
1931 upon the detected version of the libraries at build time.
1933 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1934 to extract and use the src ip:port in logging and expansions as if it
1935 were a direct connection from the outside internet. PPv2 support was
1936 updated based on HAProxy spec change in May 2014.
1938 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1940 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1941 Properly escape header and check for NULL return.
1943 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1946 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1948 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1949 characters in header names, implemented as a verify condition.
1950 Contributed by Michael Fischer v. Mollard.
1952 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1953 results permerror and temperror. Previous values are deprecated but
1954 still accepted. In a future release, err_perm and err_temp will be
1955 completely removed, which will be a backward incompatibility if the
1956 ACL tests for either of these two old results. Patch contributed by
1957 user bes-internal on the mailing list.
1959 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1961 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1962 selectors, in both main and reject logs.
1964 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1967 JH/07 Add malware type "sock" for talking to simple daemon.
1969 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1971 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1972 routers/transports under cutthrough routing.
1974 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1975 numbers. Touch up "bool" conditional to keep the same definition.
1977 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1979 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1981 JH/12 Expand items in router/transport headers_add or headers_remove lists
1982 individually rather than the list as a whole. Bug 1452.
1984 Required for reasonable handling of multiple headers_ options when
1985 they may be empty; requires that headers_remove items with embedded
1986 colons must have them doubled (or the list-separator changed).
1988 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1989 view the policy declared in the DMARC record. Currently, $dmarc_status
1990 is a combined value of both the record presence and the result of the
1993 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1995 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1996 dnslookup router and the smtp transport (applying to the forward
1999 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2000 of ldap servers used for a specific lookup. Patch provided by Heiko
2003 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2004 New variable $lookup_dnssec_authenticated for observability.
2006 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2007 Patch submitted by Lars Timman.
2009 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2011 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2012 Requires trusted mode and valid format message id, aborts otherwise.
2013 Patch contributed by Heiko Schlichting.
2015 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2016 certextract with support for various fields. Bug 1358.
2018 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2019 is requested by default, modifiable by smtp transport option
2022 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2023 operate on certificate variables to give certificate fingerprints
2024 Also new ${sha256:cert_variable}.
2026 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2028 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2029 Christian Aistleitner.
2031 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2033 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2034 file. Patch from Wolfgang Breyha.
2036 JH/25 Expand the coverage of the delivery $host and $host_address to
2037 client authenticators run in verify callout. Bug 1476.
2039 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2040 align with daemon_smtp_ports. Bug 72.
2042 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2043 support and error reporting did not work properly.
2045 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2046 and is readable. Patch from Andrew Colin Kissa.
2048 TL/14 Enhance documentation of ${run expansion and how it parses the
2049 commandline after expansion, particularly in the case when an
2050 unquoted variable expansion results in an empty value.
2052 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2054 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2055 by renaming away from it. Addresses GH issue 15, reported by
2058 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2060 TL/15 SECURITY: prevent double expansion in math comparison functions
2061 (can expand unsanitized data). Not remotely exploitable.
2068 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2070 PP/02 Make -n do something, by making it not do something.
2071 When combined with -bP, the name of an option is not output.
2073 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2076 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2077 $sender_host_name and config options to manage this, and basic check
2080 PP/05 DSCP support for outbound connections and control modifier for inbound.
2082 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2083 (Only plugin which currently uses this is kerberos4, which nobody should
2084 be using, but we should make it available and other future plugins might
2085 conceivably use it, even though it would break NAT; stuff *should* be
2086 using channel bindings instead).
2088 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2089 name; added for Sendmail compatibility; requires admin caller.
2090 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2091 just ignore it); requires trusted caller.
2092 Also parse but ignore: -Ac -Am -X<logfile>
2095 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2097 TL/02 Add +smtp_confirmation as a default logging option.
2099 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2100 Patch by Magnus Holmgren from 2007-02-20.
2102 TL/04 Bugzilla 1281 - Spec typo.
2103 Bugzilla 1283 - Spec typo.
2104 Bugzilla 1290 - Spec grammar fixes.
2106 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2108 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2110 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2111 mailing list by by Dmitry Isaikin.
2113 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2115 JH/02 Support "G" suffix to numbers in ${if comparisons.
2117 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2119 NM/01 Bugzilla 1197 - Spec typo
2120 Bugzilla 1196 - Spec examples corrections
2122 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2124 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2125 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2128 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2129 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2131 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2132 "acl {{name}{arg}...}", and optional args on acl condition
2135 JH/05 Permit multiple router/transport headers_add/remove lines.
2137 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2139 JH/07 Avoid using a waiting database for a single-message-only transport.
2140 Performance patch from Paul Fisher. Bugzilla 1262.
2142 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2145 JH/09 Add $headers_added variable, with content from use of ACL modifier
2146 add_header (but not yet added to the message). Bugzilla 199.
2148 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2149 Pulled from Bugzilla 817 by Wolfgang Breyha.
2151 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2153 (nb: this is the same fix as in Exim 4.80.1)
2155 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2158 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2161 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2163 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2164 advertise SMTP AUTH mechanism to us, instead of a generic
2165 protocol violation error. Also, make Exim more robust to bad
2166 data from the Dovecot auth socket.
2168 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2170 When a queue runner is handling a message, Exim first routes the
2171 recipient addresses, during which it prunes them based on the retry
2172 hints database. After that it attempts to deliver the message to
2173 any remaining recipients. It then updates the hints database using
2176 So if a recipient address works intermittently, it can get repeatedly
2177 deferred at routing time. The retry hints record remains fresh so the
2178 address never reaches the final cutoff time.
2180 This is a fairly common occurrence when a user is bumping up against
2181 their storage quota. Exim had some logic in its local delivery code
2182 to deal with this. However it did not apply to per-recipient defers
2183 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2185 This change adds a proper retry rule check during routing so that the
2186 final cutoff time is checked against the message's age. We only do
2187 this check if there is an address retry record and there is not a
2188 domain retry record; this implies that previous attempts to handle
2189 the address had the retry_use_local_parts option turned on. We use
2190 this as an approximation for the destination being like a local
2191 delivery, as in LMTP.
2193 I suspect this new check makes the old local delivery cutoff check
2194 redundant, but I have not verified this so I left the code in place.
2196 TF/02 Correct gecos expansion when From: is a prefix of the username.
2198 Test 0254 submits a message to Exim with the header
2202 When I ran the test suite under the user fanf2, Exim expanded
2203 the header to contain my full name, whereas it should have added
2204 a Resent-Sender: header. It erroneously treats any prefix of the
2205 username as equal to the username.
2207 This change corrects that bug.
2209 GF/01 DCC debug and logging tidyup
2210 Error conditions log to paniclog rather than rejectlog.
2211 Debug lines prefixed by "DCC: " to remove any ambiguity.
2213 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2215 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2216 Bug spotted by Jeremy Harris; was flawed since initial commit.
2217 Would have resulted in OCSP responses post-SNI triggering an Exim
2218 NULL dereference and crash.
2220 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2222 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2223 Bug detection, analysis and fix by Samuel Thibault.
2224 Bugzilla 1331, Debian bug #698092.
2226 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2228 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2229 Server implementation by Todd Lyons, client by JH.
2230 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2231 config variable "prdr_enable" controls whether the server
2232 advertises the facility. If the client requests PRDR a new
2233 acl_data_smtp_prdr ACL is called once for each recipient, after
2234 the body content is received and before the acl_smtp_data ACL.
2235 The client is controlled by both of: a hosts_try_prdr option
2236 on the smtp transport, and the server advertisement.
2237 Default client logging of deliveries and rejections involving
2238 PRDR are flagged with the string "PRDR".
2240 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2241 fclose(). Diagnosis by Todd Lyons.
2243 PP/17 Update configure.default to handle IPv6 localhost better.
2244 Patch by Alain Williams (plus minor tweaks).
2247 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2248 This is now consistent with GnuTLS, and is now documented: the
2249 previous undocumented portable approach to treating the option as
2250 unset was to force an expansion failure. That still works, and
2251 an empty string is now equivalent.
2253 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2254 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2255 not performing validation itself.
2257 PP/20 Added force_command boolean option to pipe transport.
2258 Patch from Nick Koston, of cPanel Inc.
2260 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2263 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2265 PP/21 Fix eximon continuous updating with timestamped log-files.
2266 Broken in a format-string cleanup in 4.80, missed when I repaired the
2267 other false fix of the same issue.
2268 Report and fix from Heiko Schlichting.
2271 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2272 Report from Prashanth Katuri.
2274 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2275 It's SecureTransport, so affects any MacOS clients which use the
2276 system-integrated TLS libraries, including email clients.
2278 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2279 using a MIME ACL for non-SMTP local injection.
2280 Report and assistance in diagnosis by Warren Baker.
2282 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2284 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2286 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2287 last id that failed so it may be referenced in subsequent ACL's.
2289 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2292 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2293 ldap library initialization, allowing self-signed CA's to be
2294 used. Also properly sets require_cert option later in code by
2295 using NULL (global ldap config) instead of ldap handle (per
2296 session). Bug diagnosis and testing by alxgomz.
2298 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2299 the src/util/ subdirectory.
2301 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2302 renamed to Transport Post Delivery Action by Jeremy Harris, as
2305 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2306 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2307 redis_servers = needs to be configured which will be used by the redis
2308 lookup. Patch from Warren Baker, of The Packet Hub.
2310 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2312 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2313 hostname or reverse DNS when processing a host list. Used suggestions
2314 from multiple comments on this bug.
2316 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2318 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2319 Missed a few lines, added it to make the runtest require no keyboard
2322 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2323 contains upper case chars. Make router use caseful_local_part.
2325 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2326 support when GnuTLS has been built with p11-kit.
2332 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2334 This, or similar/improved, will also be change PP/11 of 4.82.
2340 PP/01 Handle short writes when writing local log-files.
2341 In practice, only affects FreeBSD (8 onwards).
2342 Bugzilla 1053, with thanks to Dmitry Isaikin.
2344 NM/01 Bugzilla 949 - Documentation tweak
2346 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2349 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2351 PP/02 Implemented gsasl authenticator.
2353 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2355 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2356 `pkg-config foo` for cflags/libs.
2358 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2359 with rest of GSASL and with heimdal_gssapi.
2361 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2362 `pkg-config foo` for cflags/libs for the TLS implementation.
2364 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2365 properties get this fed in as external SSF. A number of robustness
2366 and debugging improvements to the cyrus_sasl authenticator.
2368 PP/08 cyrus_sasl server now expands the server_realm option.
2370 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2371 Patch by Jeremy Harris.
2373 PP/10 Added dbmjz lookup type.
2375 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2377 PP/12 MAIL args handles TAB as well as SP, for better interop with
2378 non-compliant senders.
2379 Analysis and variant patch by Todd Lyons.
2381 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2382 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2383 Patch from Dirk Mueller <dmueller@suse.com>
2385 PP/13 tls_peerdn now print-escaped for spool files.
2386 Observed some $tls_peerdn in wild which contained \n, which resulted
2387 in spool file corruption.
2389 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2390 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2391 or write after TLS renegotiation, which otherwise led to messages
2394 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2395 as a tracking header (ie: a signed header comes before the signature).
2396 Patch from Wolfgang Breyha.
2398 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2399 comma-sep list; embedded commas doubled.
2401 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2403 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2405 Report and patch from Dmitry Banschikov.
2407 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2408 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2409 failures. We appear to now support TLS1.1+ with Exim.
2411 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2412 lets Exim select keys and certificates based upon TLS SNI from client.
2413 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2414 before an outbound SMTP session. New log_selector, +tls_sni.
2416 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2417 NULL dereference. Report and patch from Alun Jones.
2419 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2420 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2421 Not seeing resolver debug output on NetBSD, but suspect this is a
2422 resolver implementation change.
2424 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2425 Left warnings. Added "eximon gdb" invocation mode.
2427 PP/21 Defaulting "accept_8bitmime" to true, not false.
2429 PP/22 Added -bw for inetd wait mode support.
2431 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2432 locate the relevant includes and libraries. Made this the default.
2434 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2435 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2437 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2438 This may cause build issues on older platforms.
2440 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2441 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2442 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2443 Added SNI support via GnuTLS too.
2444 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2446 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2448 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2449 Applied second patch from Janne, implementing suggestion to default
2450 multiple-strings-in-record handling to match SPF spec.
2452 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2454 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2455 read-only, out of scope).
2456 Patch from Wolfgang Breyha, report from Stuart Northfield.
2458 PP/29 Fix three issues highlighted by clang analyser static analysis.
2459 Only crash-plausible issue would require the Cambridge-specific
2460 iplookup router and a misconfiguration.
2461 Report from Marcin Mirosław.
2463 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2465 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2466 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2467 As part of this, removing so much warning spew let me fix some minor
2468 real issues in debug logging.
2470 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2471 assignment on my part. Fixed.
2473 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2474 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2475 Janne Snabb (who went above and beyond: thank you).
2477 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2478 string otherwise requires a connection and a bunch more work and it's
2479 relatively easy to get wrong. Should also expose TLS library linkage
2482 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2483 64-bit ${eval} (JH/03).
2485 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2486 GNU libc to support some of the 64-bit stuff, should not lead to
2487 conflicts. Defined before os.h is pulled in, so if a given platform
2488 needs to override this, it can.
2490 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2491 protection layer was required, which is not implemented.
2492 Bugzilla 1254, patch from Wolfgang Breyha.
2494 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2495 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2496 tls_dhparam take prime identifiers. Also unbreak combination of
2497 OpenSSL+DH_params+TLSSNI.
2499 PP/39 Disable SSLv2 by default in OpenSSL support.
2505 PP/01 Solaris build fix for Oracle's LDAP libraries.
2506 Bugzilla 1109, patch from Stephen Usher.
2508 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2510 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2513 TF/02 Fix a couple more cases where we did not log the error message
2514 when unlink() failed. See also change 4.74-TF/03.
2516 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2517 lock up or crash if it happened to be inside a call to libc when it
2518 got a SIGUSR1 from exiwhat.
2520 The SIGUSR1 handler appends the current process status to the process
2521 log which is later printed by exiwhat. It used to use the general
2522 purpose logging code to do this, but several functions it calls are
2523 not safe for signals.
2525 The new output code in the SIGUSR1 handler is specific to the process
2526 log, and simple enough that it's easy to inspect for signal safety.
2527 Removing some special cases also simplifies the general logging code.
2528 Removing the spurious timestamps from the process log simplifies
2531 TF/04 Improved ratelimit ACL condition.
2533 The /noupdate option has been deprecated in favour of /readonly which
2534 has clearer semantics. The /leaky, /strict, and /readonly update modes
2535 are mutually exclusive. The update mode is no longer included in the
2536 database key; it just determines when the database is updated. (This
2537 means that when you upgrade Exim will forget old rate measurements.)
2539 Exim now checks that the per_* options are used with an update mode that
2540 makes sense for the current ACL. For example, when Exim is processing a
2541 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2542 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2543 must specify per_mail/readonly. If you omit the update mode it defaults to
2544 /leaky where that makes sense (as before) or /readonly where required.
2546 The /noupdate option is now undocumented but still supported for
2547 backwards compatibility. It is equivalent to /readonly except that in
2548 ACLs where /readonly is required you may specify /leaky/noupdate or
2549 /strict/noupdate which are treated the same as /readonly.
2551 A useful new feature is the /count= option. This is a generalization
2552 of the per_byte option, so that you can measure the throughput of other
2553 aggregate values. For example, the per_byte option is now equivalent
2554 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2556 The per_rcpt option has been generalized using the /count= mechanism
2557 (though it's more complicated than the per_byte equivalence). When it is
2558 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2559 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2560 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2561 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2562 Note that using per_rcpt with a non-readonly update mode in more than
2563 one ACL will cause the recipients to be double-counted. (The per_mail
2564 and per_byte options don't have this problem.)
2566 The handling of very low rates has changed slightly. If the computed rate
2567 is less than the event's count (usually one) then this event is the first
2568 after a long gap. In this case the rate is set to the same as this event's
2569 count, so that the first message of a spam run is counted properly.
2571 The major new feature is a mechanism for counting the rate of unique
2572 events. The new per_addr option counts the number of different
2573 recipients that someone has sent messages to in the last time period. It
2574 behaves like per_rcpt if all the recipient addresses are different, but
2575 duplicate recipient addresses do not increase the measured rate. Like
2576 the /count= option this is a general mechanism, so the per_addr option
2577 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2578 example, measure the rate that a client uses different sender addresses
2579 with the options per_mail/unique=$sender_address. There are further
2580 details in the main documentation.
2582 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2584 TF/06 Removed a few PCRE remnants.
2586 TF/07 Automatically extract Exim's version number from tags in the git
2587 repository when doing development or release builds.
2589 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2590 Bugzilla 879. Patch from Paul Fisher.
2592 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2593 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2596 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2598 PP/05 Variable $av_failed, true if the AV scanner deferred.
2599 Bugzilla 1078. Patch from John Horne.
2601 PP/06 Stop make process more reliably on build failure.
2602 Bugzilla 1087. Patch from Heiko Schlittermann.
2604 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2605 Bugzilla 1089. Patch from Heiko Schlittermann.
2607 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2608 Bugzilla 1131. Patch from Holger Weiß.
2610 PP/09 Handle IPv6 addresses with SPF.
2611 Bugzilla 860. Patch from Wolfgang Breyha.
2613 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2615 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2618 PP/11 match_* no longer expand right-hand-side by default.
2619 New compile-time build option, EXPAND_LISTMATCH_RHS.
2620 New expansion conditions, "inlist", "inlisti".
2622 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2624 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2626 PP/14 fix log_write() format string regression from TF/03.
2627 Bugzilla 1152. Patch from Dmitry Isaikin.
2633 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2635 PP/02 Harmonised TLS library version reporting; only show if debugging.
2636 Layout now matches that introduced for other libraries in 4.74 PP/03.
2638 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2640 PP/04 New "dns_use_edns0" global option.
2642 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2645 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2646 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2648 TK/01 Updated PolarSSL code to 0.14.2.
2649 Bugzilla 1097. Patch from Andreas Metzler.
2651 PP/07 Catch divide-by-zero in ${eval:...}.
2652 Fixes bugzilla 1102.
2654 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2657 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2658 format-string attack -- SECURITY: remote arbitrary code execution.
2660 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2661 time unintentionally subject to list matching rules, letting the header
2662 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2663 arbitrary string expansion). This allowed for information disclosure.
2665 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2666 INT_MIN/-1 -- value coerced to INT_MAX.
2672 NM/01 Workaround for PCRE version dependency in version reporting
2675 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2676 This fixes portability to compilers other than gcc, notably
2677 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2679 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2680 makefiles for portability to HP-UX and POSIX correctness.
2682 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2683 Also via indented variable definition in the Makefile.
2684 (Debugging by Oliver Heesakkers).
2686 PP/02 Restore caching of spamd results with expanded spamd_address.
2687 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2689 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2690 Improves build reliability. Fix from: Frank Elsner
2692 NM/02 Fix wide character breakage in the rfc2047 coding
2693 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2695 NM/03 Allow underscore in dnslist lookups
2696 Fixes bug 1026. Patch from Graeme Fowler
2698 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2699 Code patches from Adam Ciarcinski of NetBSD.
2701 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2704 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2705 is logged, to avoid truncation. Patch from John Horne.
2707 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2708 Patch from Jakob Hirsch.
2710 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2711 SQL string expansion failure details.
2712 Patch from Andrey Oktyabrski.
2714 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2715 Patch from Simon Arlott.
2717 PP/09 New lookups functionality failed to compile on old gcc which rejects
2718 extern declarations in function scope.
2719 Patch from Oliver Fleischmann
2721 PP/10 Use sig_atomic_t for flags set from signal handlers.
2722 Check getgroups() return and improve debugging.
2723 Fixed developed for diagnosis in bug 927 (which turned out to be
2726 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2727 Patch from Mark Zealey.
2729 PP/12 Bugzilla 1056: Improved spamd server selection.
2730 Patch from Mark Zealey.
2732 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2733 Based on patch from Heiko Schlittermann.
2735 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2736 Patch from Uwe Doering, sign-off by Michael Haardt.
2738 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2739 variable declaration deep within a block. Bug and patch from
2742 PP/15 lookups-Makefile IRIX compatibility coercion.
2744 PP/16 Make DISABLE_DKIM build knob functional.
2746 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2747 Patch by Simon Arlott
2749 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2750 variable argument macros. Our copy now differs from upstream.
2756 TF/01 Failure to get a lock on a hints database can have serious
2757 consequences so log it to the panic log.
2759 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2760 controlled using the smtp_confirmation log selector.
2762 TF/03 Include the error message when we fail to unlink a spool file.
2764 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2765 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2766 for maintaining out-of-tree patches for some time.
2768 PP/01 Bugzilla 139: Documentation and portability issues.
2769 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2770 Handle per-OS dynamic-module compilation flags.
2772 PP/02 Let /dev/null have normal permissions.
2773 The 4.73 fixes were a little too stringent and complained about the
2774 permissions on /dev/null. Exempt it from some checks.
2775 Reported by Andreas M. Kirchwitz.
2777 PP/03 Report version information for many libraries, including
2778 Exim version information for dynamically loaded libraries. Created
2779 version.h, now support a version extension string for distributors
2780 who patch heavily. Dynamic module ABI change.
2782 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2783 privilege escalation vulnerability whereby the Exim run-time user
2784 can cause root to append content of the attacker's choosing to
2787 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2790 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2791 If dropping privileges for untrusted macros, we disabled normal logging
2792 on the basis that it would fail; for the Exim run-time user, this is not
2793 the case, and it resulted in successful deliveries going unlogged.
2794 Fixed. Reported by Andreas Metzler.
2800 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2801 only prepend for the Resent-* case. Fixes regression introduced in
2802 Exim 4.70 by NM/22 for Bugzilla 607.
2804 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2805 increasing numbers of administrators be bitten by this.
2807 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2809 PP/03 Bugzilla 994: added openssl_options main configuration option.
2811 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2813 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2815 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2817 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2818 without a peer certificate, leading to a segfault because of an
2819 assumption that peers always have certificates. Be a little more
2820 paranoid. Problem reported by Martin Tscholak.
2822 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2823 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2824 NB: ClamAV planning to remove STREAM in "middle of 2010".
2825 CL also introduces -bmalware, various -d+acl logging additions and
2826 more caution in buffer sizes.
2828 PP/09 Implemented reverse_ip expansion operator.
2830 PP/10 Bugzilla 937: provide a "debug" ACL control.
2832 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2834 PP/12 Bugzilla 973: Implement --version.
2836 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2838 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2840 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2842 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2843 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2844 ignore trailing whitespace.
2846 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2848 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2851 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2852 Notification from Dr Andrew Aitchison.
2854 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2855 ExtendedDetectionInfo response format.
2856 Notification from John Horne.
2858 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2861 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2862 XSL and documented dependency on system catalogs, with examples of how
2865 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2868 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2869 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2870 configuration file which is writeable by the Exim user or group.
2872 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2873 of configuration files to cover files specified with the -C option if
2874 they are going to be used with root privileges, not just the default
2877 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2878 option (effectively making it always true).
2880 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2881 files to be used while preserving root privileges.
2883 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2884 that rogue child processes cannot use them.
2886 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2887 run-time user, instead of root.
2889 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2890 Exim run-time user without dropping privileges.
2892 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2893 result string, instead of calling string_vformat() twice with the same
2896 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2897 for other users. Others should always drop root privileges if they use
2898 -C on the command line, even for a whitelisted configure file.
2900 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2902 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2908 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2909 $data_path, and $header_path variables; fixed documentation bugs and
2912 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2913 exipick to access non-standard spools, including the "frozen" queue
2916 NM/01 Bugzilla 965: Support mysql stored procedures.
2917 Patch from Alain Williams
2919 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2921 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2922 Patch from Andreas Metzler
2924 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2925 Patch from Kirill Miazine
2927 NM/05 Bugzilla 671: Added umask to procmail example.
2929 JJ/03 installed exipick 20100323.0, fixing doc bug
2931 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2932 directory. Notification and patch from Dan Rosenberg.
2934 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2936 TK/02 Improve log output when DKIM signing operation fails.
2938 MH/01 Treat the transport option dkim_domain as a colon separated
2939 list, not as a single string, and sign the message with each element,
2940 omitting multiple occurences of the same signer.
2942 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2943 Bugzilla 985, 986. Patch by Simon Arlott
2945 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2946 Patch by Simon Arlott
2948 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2949 MBX locking. Notification from Dan Rosenberg.
2955 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2957 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2959 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2961 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2963 NM/04 Bugzilla 915: Flag broken perl installation during build.
2969 TK/01 Added patch by Johannes Berg that expands the main option
2970 "spamd_address" if it starts with a dollar sign.
2972 TK/02 Write list of recipients to X-Envelope-Sender header when building
2973 the mbox-format spool file for content scanning (suggested by Jakob
2976 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2977 (http://www.dcc-servers.net/) support via dccifd. Activated by
2978 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2980 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2981 by Mark Daniel Reidel <mr@df.eu>.
2983 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2984 When building exim an external PCRE library is now needed -
2985 PCRE is a system library on the majority of modern systems.
2986 See entry on PCRE_LIBS in EDITME file.
2988 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2989 conversation. Added nologin parameter to request.
2990 Patch contributed by Kirill Miazine.
2992 TF/01 Do not log submission mode rewrites if they do not change the address.
2994 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2996 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2997 log files in place. Contributed by Roberto Lima.
2999 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3001 TF/03 Bugzilla 615: When checking the local_parts router precondition
3002 after a local_part_suffix or local_part_prefix option, Exim now
3003 does not use the address's named list lookup cache, since this
3004 contains cached lookups for the whole local part.
3006 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3007 Robert Millan. Documentation is in experimental-spec.txt.
3009 TF/04 Bugzilla 668: Fix parallel build (make -j).
3011 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3013 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3014 Patch provided by Jan Srzednicki.
3016 TF/05 Leading white space used to be stripped from $spam_report which
3017 wrecked the formatting. Now it is preserved.
3019 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3020 that they are available at delivery time.
3022 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3024 TF/08 TLS error reporting now respects the incoming_interface and
3025 incoming_port log selectors.
3027 TF/09 Produce a more useful error message if an SMTP transport's hosts
3028 setting expands to an empty string.
3030 NM/06 Bugzilla 744: EXPN did not work under TLS.
3031 Patch provided by Phil Pennock.
3033 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3034 Patch provided by Richard Godbee.
3036 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3037 acl_smtp_notquit, added index entry.
3039 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3040 Patch provided by Eugene Bujak.
3042 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3043 accept(). Patch provided by Maxim Dounin.
3045 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3046 Patch provided by Phil Pennock.
3048 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3050 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3051 Patch provided by Brad "anomie" Jorsch.
3053 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3054 Patch provided by Dean Brooks.
3056 TK/05 Add native DKIM support (does not depend on external libraries).
3058 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3059 Patch provided by Graeme Fowler.
3061 NM/16 Bugzilla 851: Documentation example syntax fix.
3063 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3065 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3068 NM/19 Bugzilla 745: TLS version reporting.
3069 Patch provided by Phil Pennock.
3071 NM/20 Bugzilla 167: bool: condition support.
3072 Patch provided by Phil Pennock.
3074 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3075 clients. Patch provided by Phil Pennock.
3077 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3078 Patch provided by Brad "anomie" Jorsch.
3080 NM/23 Bugzilla 687: Fix misparses in eximstats.
3081 Patch provided by Heiko Schlittermann.
3083 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3084 Patch provided by Heiko Schlittermann.
3086 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3087 plus update to original patch.
3089 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3091 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3092 Patch provided by David Brownlee.
3094 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3096 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3098 NM/30 Bugzilla 888: TLS documentation bugfixes.
3100 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3102 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3103 Unlike the original bugzilla I have changed all shell scripts in src tree.
3105 NM/33 Bugzilla 898: Transport filter timeout fix.
3106 Patch by Todd Rinaldo.
3108 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3109 Patch by Serge Demonchaux.
3111 NM/35 Bugzilla 39: Base64 decode bug fixes.
3112 Patch by Jakob Hirsch.
3114 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3116 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3118 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3120 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3126 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3127 ALT-N's libdkim that I have put here:
3128 http://duncanthrax.net/exim-experimental/
3130 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3131 were called 'true' and it seems that C99 defines that as a reserved
3132 keyword to be used with 'bool' variable types. That means you could
3133 not include C99-style headers which use bools without triggering
3134 build errors in sieve.c.
3136 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3137 as mailq or other aliases. Changed the --help handling significantly
3138 to do whats expected. exim_usage() emits usage/help information.
3140 SC/01 Added the -bylocaldomain option to eximstats.
3142 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3144 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3146 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3152 PH/01 Another patch from the Sieve maintainer.
3154 PH/02 When an IPv6 address is converted to a string for single-key lookup
3155 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3156 dots are used instead of colons so that keys in lsearch files need not
3157 contain colons. This was done some time before quoting was made available
3158 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3159 (notated using the quote facility) so as to distinguish them from IPv4
3160 keys. This meant that lookups for IP addresses in host lists did not work
3161 for iplsearch lookups.
3163 This has been fixed by arranging for IPv6 addresses to be expressed with
3164 colons if the lookup type is iplsearch. This is not incompatible, because
3165 previously such lookups could never work.
3167 The situation is now rather anomalous, since one *can* have colons in
3168 ordinary lsearch keys. However, making the change in all cases is
3169 incompatible and would probably break a number of configurations.
3171 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3174 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3175 conversion specification without a maximum field width, thereby enabling
3176 a rogue spamd server to cause a buffer overflow. While nobody in their
3177 right mind would setup Exim to query an untrusted spamd server, an
3178 attacker that gains access to a server running spamd could potentially
3179 exploit this vulnerability to run arbitrary code as the Exim user.
3181 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3182 $primary_hostname instead of what libspf2 thinks the hosts name is.
3184 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3185 a directory entry by the name of the lookup key. Previously, if a
3186 symlink pointed to a non-existing file or a file in a directory that
3187 Exim lacked permissions to read, a lookup for a key matching that
3188 symlink would fail. Now it is enough that a matching directory entry
3189 exists, symlink or not. (Bugzilla 503.)
3191 PH/03 The body_linecount and body_zerocount variables are now exported in the
3194 PH/04 Added the $dnslist_matched variable.
3196 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3197 This means they are set thereafter only if the connection becomes
3200 PH/06 Added the client_condition to authenticators so that some can be skipped
3201 by clients under certain conditions.
3203 PH/07 The error message for a badly-placed control=no_multiline_responses left
3204 "_responses" off the end of the name.
3206 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3208 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3209 (without spaces) instead of just copying the configuration text.
3211 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3213 PH/11 Added $max_received_linelength.
3215 PH/12 Added +ignore_defer and +include_defer to host lists.
3217 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3218 way in which PCRE > 7.0 is built.
3220 PH/14 Implemented queue_only_load_latch.
3222 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3223 MAIL command. The effect was to mangle the value on 64-bit systems.
3225 PH/16 Another patch from the Sieve maintainer.
3227 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3229 PH/18 If a system quota error occurred while trying to create the file for
3230 a maildir delivery, the message "Mailbox is full" was not appended to the
3231 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3232 only to a quota excession during the actual writing of the file.
3234 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3235 characters?) which causes problems in log lines. The DN values are now
3236 passed through string_printing() before being added to log lines.
3238 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3239 and InterBase are left for another time.)
3241 PH/21 Added message_body_newlines option.
3243 PH/22 Guard against possible overflow in moan_check_errorcopy().
3245 PH/23 POSIX allows open() to be a macro; guard against that.
3247 PH/24 If the recipient of an error message contained an @ in the local part
3248 (suitably quoted, of course), incorrect values were put in $domain and
3249 $local_part during the evaluation of errors_copy.
3255 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3256 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3259 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3260 issue a MAIL command.
3262 PH/02 In an ACL statement such as
3264 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3266 if a client was not listed at all, or was listed with a value other than
3267 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3268 the condition was not true (as it should be), so access was not denied.
3269 The bug was that the ! inversion was incorrectly passed on to the second
3270 item. This has been fixed.
3272 PH/03 Added additional dnslists conditions == and =& which are different from
3273 = and & when the dns lookup returns more than one IP address.
3275 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3276 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3278 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3279 FSYNC, which compiles an option called disable_fsync that allows for
3280 bypassing fsync(). The documentation is heavily laced with warnings.
3282 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3284 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3285 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3286 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3287 including adding "make clean"; (3) Added -fPIC when compiling the test
3288 dynamically loaded module, to get rid of a warning.
3290 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3291 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3292 = 0s. The bug is otherwise harmless.
3294 PH/07 There was a bug in the dovecot authenticator such that the value of
3295 $auth1 could be overwritten, and so not correctly preserved, after a
3296 successful authentication. This usually meant that the value preserved by
3297 the server_setid option was incorrect.
3299 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3301 PH/09 Installed PCRE release 7.0.
3303 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3304 run for batched SMTP input. It is now run at the start of every message
3305 in the batch. While fixing this I discovered that the process information
3306 (output by running exiwhat) was not always getting set for -bs and -bS
3307 input. This is fixed, and it now also says "batched" for BSMTP.
3309 PH/11 Added control=no_pipelining.
3311 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3312 patch, slightly modified), and move the expansion of helo_data till after
3313 the connection is made in the smtp transport (so it can use these
3316 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3318 PH/14 Added log_selector = +pid.
3320 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3322 PH/16 Add ${if forany and ${if forall.
3324 PH/17 Added dsn_from option to vary the From: line in DSNs.
3326 PH/18 Flush SMTP output before performing a callout, unless control =
3327 no_callout_flush is set.
3329 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3330 was true (the default) a successful delivery failed to delete the retry
3331 item, thus causing premature timeout of the address. The bug is now
3334 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3336 PH/21 Long custom messages for fakedefer and fakereject are now split up
3337 into multiline responses in the same way that messages for "deny" and
3338 other ACL rejections are.
3340 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3341 with slight modification.
3343 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3344 draft, changing the syntax and factoring some duplicate code".
3346 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3347 for deliveries of the second and subsequent messages over the same SMTP
3350 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3351 ${reduce, with only minor "tidies".
3353 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3355 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3356 expansion side effects.
3358 PH/27 When a message times out after an over-quota error from an Exim-imposed
3359 quota, the bounce message says "mailbox is full". This message was not
3360 being given when it was a system quota that was exceeded. It now should
3363 MH/03 Made $recipients available in local_scan(). local_scan() already has
3364 better access to the recipient list through recipients_list[], but
3365 $recipients can be useful in postmaster-provided expansion strings.
3367 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3368 in the case of a MAIL command with additional options following the
3369 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3370 were accidentally chopped off.
3372 PH/29 SMTP synchronization checks are implemented when a command is read -
3373 there is a check that no more input is waiting when there shouldn't be
3374 any. However, for some commands, a delay in an ACL can mean that it is
3375 some time before the response is written. In this time, more input might
3376 arrive, invalidly. So now there are extra checks after an ACL has run for
3377 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3378 pipelining has not been advertised.
3380 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3382 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3383 returned in the SMTP response when smtp_return_error_details was false.
3384 This has been fixed.
3386 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3387 instead of the C I/O that was originally supplied, because problems were
3388 reported on Solaris.
3390 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3391 Exim which did not show up earlier: it was assuming that a call to
3392 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3393 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3394 was a macro that became an assignment, so it seemed to work. This has
3395 changed to a proper function call with a void return, hence the compile
3396 error. Exim's code has been fixed.
3398 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3401 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3403 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3405 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3406 because it turns out to be too big or there is a timeout) there is no
3407 "Completed" line in the log. When some messages of this type were
3408 selected by exigrep, they were listed as "not completed". Others were
3409 picked up by some special patterns. I have improved the selection
3410 criteria to be more general.
3412 PH/38 The host_find_failed option in the manualroute router can now be set
3413 to "ignore", to completely ignore a host whose IP address cannot be
3414 found. If all hosts are ignored, the behaviour is controlled by the new
3415 host_all_ignored option.
3417 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3418 homing or because of multiple MX records with /mx) generated more than
3419 one IP address, and the following item turned out to be the local host,
3420 all the secondary addresses of the first item were incorrectly removed
3421 from the list, along with the local host and any following hosts (which
3422 is what is supposed to happen).
3424 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3425 whoever called Exim into the -H file. In the case of the daemon it was
3426 behaving confusingly. When first started, it used values for whoever
3427 started the daemon, but after a SIGHUP it used the Exim user (because it
3428 calls itself on a restart). I have changed the code so that it now always
3431 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3432 message are rejected with the same error (e.g. no authentication or bad
3433 sender address), and a DATA command is nevertheless sent (as can happen
3434 with PIPELINING or a stupid MUA), the error message that was given to the
3435 RCPT commands is included in the rejection of the DATA command. This is
3436 intended to be helpful for MUAs that show only the final error to their
3439 PH/42 Another patch from the Sieve maintainer.
3441 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3442 Eximstats - Fixed some broken HTML links and added missing column headers
3444 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3445 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3447 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3449 PH/43 Yet another patch from the Sieve maintainer.
3451 PH/44 I found a way to check for a TCP/IP connection going away before sending
3452 the response to the final '.' that terminates a message, but only in the
3453 case where the client has not sent further data following the '.'
3454 (unfortunately, this is allowed). However, in many cases there won't be
3455 any further data because there won't be any more messages to send. A call
3456 to select() can be used: if it shows that the input is "ready", there is
3457 either input waiting, or the socket has been closed. An attempt to read
3458 the next input character can distinguish the two cases. Previously, Exim
3459 would have sent an OK response which the client would never have see.
3460 This could lead to message repetition. This fix should cure that, at
3461 least in a lot of common cases.
3463 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3464 advertised in response to EHLO.
3470 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3471 fixed by 4.65/MH/01 (is this a record?) are fixed:
3473 (i) An empty string was always treated as zero by the numeric comparison
3474 operators. This behaviour has been restored.
3476 (ii) It is documented that the numeric comparison operators always treat
3477 their arguments as decimal numbers. This was broken in that numbers
3478 starting with 0 were being interpreted as octal.
3480 While fixing these problems I realized that there was another issue that
3481 hadn't been noticed. Values of message_size_limit (both the global option
3482 and the transport option) were treated as octal if they started with 0.
3483 The documentation was vague. These values are now always treated as
3484 decimal, and I will make that clear in the documentation.
3490 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3491 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3494 MH/01 Don't check that the operands of numeric comparison operators are
3495 integers when their expansion is in "skipping" mode (fixes bug
3496 introduced by 4.64-PH/07).
3498 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3499 child addresses, Exim now panics and dies. Previously, because the count
3500 is held in a short int, deliveries were likely to be lost. As such a
3501 large number of recipients for a single message is ridiculous
3502 (performance will be very, very poor), I have chosen to impose a limit
3503 rather than extend the field.
3509 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3510 leftover -K file (the existence of which was triggered by #402).
3511 While we were at it, introduced process PID as part of the -K
3512 filename. This should rule out race conditions when creating
3515 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3516 processing considerably. Previous code took too long for large mails,
3517 triggering a timeout which in turn triggers #401.
3519 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3520 in the DK code in transports.c. sendfile() is not really portable,
3521 hence the _LINUX specificness.
3523 TF/01 In the add_headers option to the mail command in an Exim filter,
3524 there was a bug that Exim would claim a syntax error in any
3525 header after the first one which had an odd number of characters
3528 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3529 callout verification, Exim cached a "reject" for the entire domain. This
3530 is correct for most verifications, but it is not correct for a recipient
3531 verification with use_sender or use_postmaster set, because in that case
3532 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3533 case of MAIL FROM:<> rejection from other early rejections (e.g.
3534 rejection of HELO). When verifying a recipient using a non-null MAIL
3535 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3536 Whatever the result of the callout, the value of the domain cache is
3537 left unchanged (for any other kind of callout, getting as far as trying
3538 RCPT means that the domain itself is ok).
3540 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3543 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3544 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3545 session, the daemon ignores ECONNECT errors and logs others; it now
3546 ignores EPIPE as well.
3548 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3549 (quoted-printable decoding).
3551 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3552 later the small subsequent patch to fix an introduced bug.
3554 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3556 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3558 PH/08 An error is now given if message_size_limit is specified negative.
3560 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3561 to be given (somewhat) arbitrary names.
3563 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3566 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3567 miscellaneous code fixes
3569 PH/10 Added the log_reject_target ACL modifier to specify where to log
3572 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3573 hostname. This is wrong, because it relates to the incoming message (and
3574 probably the interface on which it is arriving) and not to the outgoing
3575 callout (which could be using a different interface). This has been
3576 changed to use the value of the helo_data option from the smtp transport
3577 instead - this is what is used when a message is actually being sent. If
3578 there is no remote transport (possible with a router that sets up host
3579 addresses), $smtp_active_hostname is used.
3581 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3582 tweaks were necessary in order to get it to work (see also 21 below):
3583 (a) The code assumed that strncpy() returns a negative number on buffer
3584 overflow, which isn't the case. Replaced with Exim's string_format()
3586 (b) There were several signed/unsigned issues. I just did the minimum
3587 hacking in of casts. There is scope for a larger refactoring.
3588 (c) The code used strcasecmp() which is not a standard C function.
3589 Replaced with Exim's strcmpic() function.
3590 (d) The code set only $1; it now sets $auth1 as well.
3591 (e) A simple test gave the error "authentication client didn't specify
3592 service in request". It would seem that Dovecot has changed its
3593 interface. Fortunately there's a specification; I followed it and
3594 changed what the client sends and it appears to be working now.
3596 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3599 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3600 address A is aliased to B and C, where B exists and C does not. Without
3601 -v the output is "A verified" because verification stops after a
3602 successful redirection if more than one address is generated. However,
3603 with -v the child addresses are also verified. Exim was outputting "A
3604 failed to verify" and then showing the successful verification for C,
3605 with its parentage. It now outputs "B failed to verify", showing B's
3606 parentage before showing the successful verification of C.
3608 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3609 look up a TXT record in a specific list after matching in a combined
3612 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3613 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3614 they consult the DNS. I had assumed they would set it the way they
3615 wanted; and indeed my experiments on Linux seem to show that in some
3616 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3617 To be on the safe side, however, I have now made the interface to
3618 host_find_byname() similar to host_find_bydns(), with an argument
3619 containing the DNS resolver options. The host_find_byname() function now
3620 sets these options at its start, just as host_find_bydns() does. The smtp
3621 transport options dns_qualify_single and dns_search_parents are passed to
3622 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3623 of host_find_byname() use the default settings of RES_DEFNAMES
3624 (qualify_single) but not RES_DNSRCH (search_parents).
3626 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3627 spool_read_header() do less string testing, by means of a preliminary
3628 switch on the second character of optional "-foo" lines. (This is
3629 overdue, caused by the large number of possibilities that now exist.
3630 Originally there were few.) While I was there, I also converted the
3631 str(n)cmp tests so they don't re-test the leading "-" and the first
3632 character, in the hope this might squeeze out yet more improvement.
3634 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3635 flag allowing group syntax was set by the header_syntax check but not
3636 turned off, possible causing trouble later; (2) The flag was not being
3637 set at all for the header_verify test, causing "group"-style headers to
3638 be rejected. I have now set it in this case, and also caused header_
3639 verify to ignore an empty address taken from a group. While doing this, I
3640 came across some other cases where the code for allowing group syntax
3641 while scanning a header line wasn't quite right (mostly, not resetting
3642 the flag correctly in the right place). These bugs could have caused
3643 trouble for malformed header lines. I hope it is now all correct.
3645 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3646 with the "reply" argument non-NULL. The code, however (which originally
3647 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3648 but it didn't always do it. This confused somebody who was copying the
3649 code for some other use. I have removed all the tests.
3651 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3652 feature that was used to support insecure browsers during the U.S. crypto
3653 embargo. It requires special client support, and Exim is probably the
3654 only MTA that supported it -- and would never use it because real RSA is
3655 always available. This code has been removed, because it had the bad
3656 effect of slowing Exim down by computing (never used) parameters for the
3657 RSA_EXPORT functionality.
3659 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3660 authenticator to fail if there's a tab character in the incoming data
3661 (there should never be unless someone is messing about, as it's supposed
3662 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3663 if the connection is using TLS or if the remote IP is the same as the
3664 local IP, and the "valid-client-cert option" if a client certificate has
3667 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3668 authenticators. This can be used for authorization after authentication
3669 succeeds. (In the case of plaintext, it servers for both authentication
3672 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3673 if any retry times were supplied.
3675 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3676 connection, where there is no client IP address to check. In this
3677 situation, the verify now always succeeds.
3679 PH/25 Applied John Jetmore's -Mset patch.
3681 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3683 PH/27 In a string expansion for a processed (not raw) header when multiple
3684 headers of the same name were present, leading whitespace was being
3685 removed from all of them, but trailing whitespace was being removed only
3686 from the last one. Now trailing whitespace is removed from each header
3687 before concatenation. Completely empty headers in a concatenation (as
3688 before) are ignored.
3690 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3691 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3693 PH/29 [Removed. This was a change that I later backed out, and forgot to
3694 correct the ChangeLog entry (that I had efficiently created) before
3695 committing the later change.]
3697 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3698 address errors (4xx response to RCPT) over the same connection as other
3699 messages routed to the same hosts. Such deliveries are always "forced",
3700 so retry times are not inspected. This resulted in far too many retries
3701 for the affected addresses. The effect occurred only when there were more
3702 hosts than the hosts_max_try setting in the smtp transport when it had
3703 the 4xx errors. Those hosts that it had tried were not added to the list
3704 of hosts for which the message was waiting, so if all were tried, there
3705 was no problem. Two fixes have been applied:
3707 (i) If there are any address or message errors in an SMTP delivery, none
3708 of the hosts (tried or untried) are now added to the list of hosts
3709 for which the message is waiting, so the message should not be a
3710 candidate for sending over the same connection that was used for a
3711 successful delivery of some other message. This seems entirely
3712 reasonable: after all the message is NOT "waiting for some host".
3713 This is so "obvious" that I'm not sure why it wasn't done
3714 previously. Hope I haven't missed anything, but it can't do any
3715 harm, as the worst effect is to miss an optimization.
3717 (ii) If, despite (i), such a delivery is accidentally attempted, the
3718 routing retry time is respected, so at least it doesn't keep
3719 hammering the server.
3721 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3722 in ${readsocket because some servers need this prod.
3724 PH/32 Added some extra debug output when updating a wait-xxx database.
3726 PH/33 The hint "could be header name not terminated by colon", which has been
3727 given for certain expansion errors for a long time, was not being given
3728 for the ${if def:h_colon_omitted{... case.
3730 PH/34 The spec says: "With one important exception, whenever a domain list is
3731 being scanned, $domain contains the subject domain." There was at least
3732 one case where this was not true.
3734 PH/35 The error "getsockname() failed: connection reset by peer" was being
3735 written to the panic log as well as the main log, but it isn't really
3736 panic-worthy as it just means the connection died rather early on. I have
3737 removed the panic log writing for the ECONNRESET error when getsockname()
3740 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3741 runs only) independently of the message's sender address. This meant
3742 that, if the 4xx error was in fact related to the sender, a different
3743 message to the same recipient with a different sender could confuse
3744 things. In particular, this can happen when sending to a greylisting
3745 server, but other circumstances could also provoke similar problems.
3746 I have changed the default so that the retry time for these errors is now
3747 based a combination of the sender and recipient addresses. This change
3748 can be overridden by setting address_retry_include_sender=false in the
3751 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3752 remote server are returned as part of bounce messages. This was not
3753 happening for LMTP over a pipe (the lmtp transport), but now it is the
3754 same for both kinds of LMTP.
3756 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3757 in header lines that were in fact CNAMEs. This is no longer the case.
3759 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3760 and queue runs started by the daemon processed all messages. This has
3761 been fixed so that -R and -S can now usefully be given with -q<time>.
3763 PH/40 Import PCRE release 6.7 (fixes some bugs).
3765 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3767 PH/42 Give an error if -q is specified more than once.
3769 PH/43 Renamed the variables $interface_address and $interface_port as
3770 $received_ip_address and $received_port, to make it clear that these
3771 values apply to message reception, and not to the outgoing interface when
3772 a message is delivered. (The old names remain recognized, of course.)
3774 PH/44 There was no timeout on the connect() call when using a Unix domain
3775 socket in the ${readsocket expansion. There now is.
3777 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3778 be meaningful with "accept".
3780 SC/01 Eximstats V1.43
3781 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3783 SC/02 Eximstats V1.44
3784 Use a glob alias rather than an array ref in the generated
3785 parser. This improves both readability and performance.
3787 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3788 Collect SpamAssassin and rejection statistics.
3789 Don't display local sender or destination tables unless
3790 there is data to show.
3791 Added average volumes into the top table text output.
3793 SC/04 Eximstats V1.46
3794 Collect data on the number of addresses (recipients)
3795 as well as the number of messages.
3797 SC/05 Eximstats V1.47
3798 Added 'Message too big' to the list of mail rejection
3799 reasons (thanks to Marco Gaiarin).
3801 SC/06 Eximstats V1.48
3802 Mainlog lines which have GMT offsets and are too short to
3803 have a flag are now skipped.
3805 SC/07 Eximstats V1.49 (Alain Williams)
3806 Added the -emptyok flag.
3808 SC/08 Eximstats V1.50
3809 Fixes for obtaining the IP address from reject messages.
3811 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3812 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3813 whitespace changes from 4.64-PH/27
3815 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3818 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3819 are found, allow negative numbers in numeric criteria)
3821 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3823 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3824 to match changes made in 4.64-PH/43
3826 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3828 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3829 "domain" is actually an IP address, and force a failure. This locks out
3830 those revolvers/nameservers that support "A-for-A" lookups, in
3831 contravention of the specifications.
3833 PH/48 When a host name was looked up from an IP address, and the subsequent
3834 forward lookup of the name timed out, the host name was left in
3835 $sender_host_name, contrary to the specification.
3837 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3838 restricted to single-key lookups, Exim was not diagnosing an error if
3839 * or *@ was used with a query-style lookup.
3841 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3843 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3844 long ago, but noone interested enough thought of it. Let's just say that
3845 the "1.1" means that there are some new functions that weren't there at
3846 some point in the past.
3848 PH/51 Error processing for expansion failure of helo_data from an smtp
3849 transport during callout processing was broken.
3851 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3852 tested/used via the -bh/-bhc/-bs options.
3854 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3855 bug, fixed in subsequent PCRE releases).
3857 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3858 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3860 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3866 SC/01 Use a glob alias rather than an array ref in eximstats generated
3867 parser. This improves both readability and performance.
3869 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3870 Don't display local sender or destination tables in eximstats unless
3871 there is data to show.
3872 Added average volumes into the eximstats top table text output.
3874 SC/03 Collect data on the number of addresses (recipients) as well
3875 as the number of messages in eximstats.
3877 TF/01 Correct an error in the documentation for the redirect router. Exim
3878 does (usually) call initgroups() when daemonizing.
3880 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3881 with consistent privilege compared to when running as a daemon.
3883 TF/03 Note in the spec that $authenticated_id is not set for local
3884 submissions from trusted users.
3886 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3887 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3889 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3890 by adding some example configuration directives to the default
3891 configuration file. A little bit of work is required to uncomment the
3892 directives and define how usernames and passwords are checked, but
3893 there is now a framework to start from.
3895 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3896 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3897 without this. I don't know how relevant this is to other LDAP libraries.
3899 PH/02 Add the verb name to the "unknown ACL verb" error.
3901 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3903 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3905 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3906 directory not expanded when it should be if an expanded home directory
3907 was set for the address (which is overridden by the transport).
3909 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3912 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3913 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3914 because it is too late at that time, and has no effect.
3916 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3917 security issue with \' (bugzilla #107). I could not use the
3918 PQescapeStringConn() function, because it needs a PGconn value as one of
3921 PH/08 When testing addresses using -bt, indicate those final addresses that
3922 are duplicates that would not cause an additional delivery. At least one
3923 person was confused, thinking that -bt output corresponded to deliveries.
3924 (Suppressing duplicates isn't a good idea as you lose the information
3925 about possibly different redirections that led to the duplicates.)
3927 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3928 systems where poll() doesn't work, in particular OS X.
3930 PH/10 Added more information to debugging output for retry time not reached.
3932 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3933 operations in malware.c.
3935 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3938 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3939 syslog_duplication set false, log lines that would normally be written
3940 both the the main log and to the reject log were not written to syslog at
3943 PH/14 In the default configuration, change the use of "message" in ACL warn
3944 statements to "add_header".
3946 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3947 not followed by a command (e.g. "seen endif").
3949 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3950 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3953 PH/17 Added extra conditions to the default value of delay_warning_condition
3957 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3958 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3959 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3962 The Auto-Submitted: and various List- headers are standardised, whereas I
3963 don't think Precedence: ever was.
3965 PH/18 Refactored debugging code in route_finduser() to show more information,
3966 in particular, the error code if getpwnam() issues one.
3968 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3969 This is apparently needed in addition to the PH/07 change above to avoid
3970 any possible encoding problems.
3972 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3973 but not after initializing Perl.
3975 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3976 output them only if debugging. By default they are written stderr,
3977 apparently, which is not desirable.
3979 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3982 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3985 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3987 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3988 authenticated or an ident call has been made. Suppress the default
3989 values for $authenticated_id and $authenticated_sender (but permit -oMai
3990 and -oMas) when testing with -bh.
3992 PH/24 Re-jigged the order of the tests in the default configuration so that the
3993 tests for valid domains and recipients precede the DNS black list and CSA
3994 tests, on the grounds that those ones are more expensive.
3996 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3997 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3998 This bug exists in every version of Exim that I still have, right back to
4001 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4002 However, an attempt to turn on case-sensitivity in a regex key by
4003 including (?-i) didn't work because the subject string was already
4004 lowercased, and the effects were non-intuitive. It turns out that a
4005 one-line patch can be used to allow (?-i) to work as expected.
4011 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4012 other effects) broke the use of negated acl sub-conditions.
4014 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4017 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4018 "Deny" causes Exim to reject the incoming connection with a 554 error.
4019 Unfortunately, if there is a major crisis, such as a disk failure,
4020 tcp-wrappers gives "deny", whereas what one would like would be some
4021 kind of temporary error. A kludge has been added to help with this.
4022 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4023 554 error is used if errno is still zero or contains ENOENT (which occurs
4024 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4027 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4029 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4030 errors. Otherwise a message that provokes a temporary error (when other
4031 messages do not) can cause a whole host to time out.
4033 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4034 addresses were routed directly to files or pipes from a redirect router.
4035 File deliveries just didn't batch; pipe deliveries might have suffered
4038 PH/06 A failure to get a lock for a hints database would erroneously always say
4039 "Failed to get write lock", even when it was really a read lock.
4041 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4042 of 0600. This has been changed to use the value of the lockfile_mode
4043 option (which defaults to 0600).
4045 PH/08 Applied small patch from the Sieve maintainer.
4047 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4048 folder from quota calculations, a direct delivery into this folder messed
4049 up the contents of the maildirsize file. This was because the regex was
4050 used only to exclude .Trash (or whatever) when the size of the mailbox
4051 was calculated. There was no check that a delivery was happening into an
4052 excluded directory. This bug has been fixed by ignoring all quota
4053 processing for deliveries into excluded directories.
4055 PH/10 Added the maildirfolder_create_regex option to appendfile.
4061 PH/01 The code for finding all the local interface addresses on a FreeBSD
4062 system running IPv6 was broken. This may well have applied to all BSD
4063 systems, as well as to others that have similar system calls. The broken
4064 code found IPv4 interfaces correctly, but gave incorrect values for the
4065 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4066 that it would not match correctly against @[] and not recognize the IPv6
4069 PH/02 The ipliteral router was not recognizing addresses of the form user@
4070 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4072 PH/03 Added disable_ipv6.
4074 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4075 decoded form, because it is most often used to construct To: headers
4076 lines in autoreplies, and the decoded form may well be syntactically
4077 invalid. However, $reply_address has leading white space removed, and all
4078 newlines turned into spaces so that the autoreply transport does not
4081 PH/05 If group was specified without a user on a router, and no group or user
4082 was specified on a transport, the group from the router was ignored.
4084 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4085 for visible compile-time settings that can be used to change these
4086 numbers, for those that want even more. Backwards compatibility with old
4087 spool files has been maintained. However, going back to a previous Exim
4088 release will lost any variables that are in spool files.
4090 PH/07 Two small changes when running in the test harness: increase delay when
4091 passing a TCP/IP connection to a new process, in case the original
4092 process has to generate a bounce, and remove special handling of
4093 127.0.0.2 (sic), which is no longer necessary.
4095 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4096 be the same on different OS.
4098 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4101 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4102 whether --show-vars was specified or not
4104 JJ/02 exipick: Added support for new ACL variable spool format introduced
4107 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4108 syntactically invalid From: or Reply-to: line, and a filter used this to
4109 generate an autoreply, and therefore failed to obtain an address for the
4110 autoreply, Exim could try to deliver to a non-existent relative file
4111 name, causing unrelated and misleading errors. What now happens is that
4112 it logs this as a hard delivery error, but does not attempt to create a
4115 PH/11 The exinext utility has a -C option for testing purposes, but although
4116 the given file was scanned by exinext itself; it wasn't being passed on
4117 when Exim was called.
4119 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4120 an end-of-file indication when reading a command response.
4122 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4123 compiled. In many other places in Exim, IPv6 addresses are always
4124 recognized, so I have changed this. It also means that IPv4 domain
4125 literals of the form [IPV4:n.n.n.n] are now always recognized.
4127 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4128 used if the router is not running as root, for example, when verifying at
4129 ACL time, or when using -bh. The debugging output from this situation was
4130 non-existent - all you got was a failure to exec. I have made two
4133 (a) Failures to set uid/gid, the current directory, or a process leader
4134 in a subprocess such as that created by queryprogram now generate
4135 suitable debugging output when -d is set.
4137 (b) The queryprogram router detects when it is not running as root,
4138 outputs suitable debugging information if -d is set, and then runs
4139 the subprocess without attempting to change uid/gid.
4141 PH/15 Minor change to Makefile for building test_host (undocumented testing
4144 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4145 additional section of a DNS packet that returns MX or SRV records.
4146 Instead, it always explicitly searches for A/AAAA records. This avoids
4147 major problems that occur when a DNS server includes only records of one
4148 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4149 fixed another bug: if SRV records were looked up and the corresponding
4150 address records were *not* found in the additional section, the port
4151 values from the SRV records were lost.
4153 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4154 using the correct key (the original address) when searching the retry
4155 rules in order to find which one to use for generating the retry hint.
4157 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4158 adding the default one. Similarly, if it contains a Reply-To: header, the
4159 errors_reply_to option, if set, is not used.
4161 PH/19 When calculating a retry time, Exim used to measure the "time since
4162 failure" by looking at the "first failed" field in the retry record. Now
4163 it does not use this if it is later than than the arrival time of the
4164 message. Instead it uses the arrival time. This makes for better
4165 behaviour in cases where some deliveries succeed, thus re-setting the
4166 "first failed" field. An example is a quota failure for a huge message
4167 when small messages continue to be delivered. Without this change, the
4168 "time since failure" will always be short, possible causing more frequent
4169 delivery attempts for the huge message than are intended.
4170 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4172 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4173 $1, $2, $3) because the numerical variables can be reset during some
4174 expansion items (e.g. "match"), thereby losing the authentication data.
4176 PH/21 Make -bV show the size of off_t variables so that the test suite can
4177 decide whether to run tests for quotas > 2G.
4179 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4180 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4181 filecount value is greater than 2G or if a quota value is greater than 2G
4182 on a system where the size of off_t is not greater than 4, a panic error
4185 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4186 never match. The debug and -bh output now contains an explicit error
4187 message indicating a malformed IPv4 address or mask.
4189 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4190 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4191 PH/23 above applies.
4193 PH/25 Do not write to syslog when running in the test harness. The only
4194 occasion when this arises is a failure to open the main or panic logs
4195 (for which there is an explicit test).
4197 PH/26 Added the /no_tell option to "control=freeze".
4199 PH/27 If a host name lookup failed very early in a connection, for example, if
4200 the IP address matched host_lookup and the reverse lookup yielded a name
4201 that did not have a forward lookup, an error message of the form "no IP
4202 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4203 could be logged. Now it outputs the IP address instead of "NULL".
4205 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4206 allows the sender and the authenticated sender to be set when
4207 submitting a message from within Exim. Since child_open_exim() is
4208 documented for local_scan(), the new function should be too.
4210 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4211 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4212 results in an empty string is now treated as unset.
4214 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4216 PH/31 Added sender_verify_fail logging option.
4218 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4219 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4220 tidied the source and removed it altogether.
4222 PH/33 When a queue run was abandoned because the load average was too high, a
4223 log line was always written; now it is written only if the queue_run log
4224 selector is set. In addition, the log line for abandonment now contains
4225 information about the queue run such as the pid. This is always present
4226 in "start" and "stop" lines but was omitted from the "abandon" line.
4228 PH/34 Omit spaces between a header name and the colon in the error message that
4229 is given when verify = headers_syntax fails (if there are lots of them,
4230 the message gets confusing).
4232 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4233 names, as there are now some PTR records that contain slashes. This check
4234 is only to protect against broken name servers that fall over on strange
4235 characters, so the fact that it applies to all lookups doesn't matter.
4237 PH/36 Now that the new test suite is complete, we can remove some of the
4238 special code in Exim that was needed for the old test suite. For example,
4239 sorting DNS records because real resolvers return them in an arbitrary
4240 order. The new test suite's fake resolver always returns records in the
4243 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4244 bounces) except when queue_only is set, to avoid logging races between
4245 the different processes.
4247 PH/38 Panic-die if .include specifies a non-absolute path.
4249 PH/39 A tweak to the "H" retry rule from its user.
4251 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4252 a label. They prevented compilation on older perls.
4254 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4255 a warning to be raised on newish perls.
4257 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4258 on queue. Changes to match documented behaviour of showing count of
4259 messages matching specified criteria.
4261 PH/40 Changed the default ident timeout from 30s to 5s.
4263 PH/41 Added support for the use of login_cap features, on those BSD systems
4264 that have them, for controlling the resources used by pipe deliveries.
4266 PH/42 The content-scanning code uses fopen() to create files in which to put
4267 message data. Previously it was not paying any attention to the mode of
4268 the files. Exim runs with umask(0) because the rest of the code creates
4269 files with open(), and sets the required mode explicitly. Thus, these
4270 files were ending up world-writeable. This was not a big issue, because,
4271 being within the spool directory, they were not world-accessible. I have
4272 created a function called modefopen, which takes an additional mode
4273 argument. It sets umask(777), creates the file, chmods it to the required
4274 mode, then resets the umask. All the relevant calls to fopen() in the
4275 content scanning code have been changed to use this function.
4277 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4278 to 24 hours. This avoids potential overflow problems when processing G
4279 and H retry rules. I suspect nobody ever tinkers with this value.
4281 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4283 PH/45 When the plaintext authenticator is running as a client, the server's
4284 challenges are checked to ensure they are valid base64 strings. By
4285 default, the authentication attempt is cancelled if an invalid string is
4286 received. Setting client_ignore_invalid_base64 true ignores these errors.
4287 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4288 they are received. Thus, the responses can be made to depend on the
4289 challenges. If an invalid string is ignored, an empty string is placed in
4292 PH/46 Messages that are created by the autoreply transport now contains a
4293 References: header, in accordance with RFCs 2822 and 3834.
4295 PH/47 Added authenticated_sender_force to the smtp transport.
4297 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4299 PH/49 Installed latest patch from the Sieve maintainer.
4301 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4302 was also set, the appendfile transport was unnecessarily scanning a
4303 directory of message files (e.g. for maildir delivery) to find the count
4304 of files (along with the size), even though it did not need this
4305 information. It now does the scan only if it needs to find either the
4306 size of the count of files.
4308 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4310 PH/52 Two bugs concerned with error handling when the smtp transport is
4313 (i) Exim was not creating retry information for temporary errors given
4314 for individual recipients after the DATA command when the smtp transport
4315 was used in LMTP mode. This meant that they could be retried too
4316 frequently, and not timed out correctly.
4318 (ii) Exim was setting the flag that allows error details to be returned
4319 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4320 recipients that were returned after the DATA command.
4322 PH/53 This is related to PH/52, but is more general: for any failing address,
4323 when detailed error information was permitted to be returned to the
4324 sender, but the error was temporary, then after the final timeout, only
4325 "retry timeout exceeded" was returned. Now it returns the full error as
4326 well as "retry timeout exceeded".
4328 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4329 do this, and (what is worse) MTAs that accept it.
4331 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4332 will now be deprecated.
4334 PH/56 New os.c-cygwin from the Cygwin maintainer.
4336 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4337 formats (previously only available in exim formats via -bpr, -bpru,
4338 and -bpra. Now also available in native and exiqgrep formats)
4340 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4341 with very large, slow to parse queues
4343 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4345 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4347 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4348 responses to authentication challenges, though it was showing the
4349 challenges; (ii) I've removed the CR characters from the debug output for
4352 PH/58 Allow for the insertion of a newline as well as a space when a string
4353 is turned into more than one encoded-word during RFC 2047 encoding. The
4354 Sieve code now uses this.
4356 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4357 data_4xx, lost_connection, tls_required.
4359 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4360 message was being sent as an SMTP response.
4362 PH/61 Add -l and -k options to exicyclog.
4364 PH/62 When verifying, if an address was redirected to one new address, so that
4365 verification continued, and the new address failed or deferred after
4366 having set something in $address_data, the value of $address_data was not
4367 passed back to the ACL. This was different to the case when no
4368 redirection occurred. The value is now passed back in both cases.
4370 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4371 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4372 use login_cap.h, so on its own it isn't the distinguishing feature. The
4373 new name refers directly to the setclassresources() function.
4375 PH/65 Added configuration files for NetBSD3.
4377 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4379 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4380 is preferred over IPv4.
4382 PH/68 The bounce_return_message and bounce_return_body options were not being
4383 honoured for bounces generated during the reception of non-SMTP messages.
4384 In particular, this applied to messages rejected by the ACL. This bug has
4385 been fixed. However, if bounce_return_message is true and bounce_return_
4386 body is false, the headers that are returned for a non-SMTP message
4387 include only those that have been read before the error was detected.
4388 (In the case of an ACL rejection, they have all been read.)
4390 PH/69 The HTML version of the specification is now built in a directory called
4391 spec_html instead of spec.html, because the latter looks like a path with
4392 a MIME-type, and this confuses some software.
4394 PH/70 Catch two compiler warnings in sieve.c.
4396 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4397 function verify_get_ident() calls ip_connect() to connect a socket, but
4398 if the "connect()" function timed out, ip_connect() used to close the
4399 socket. However, verify_get_ident() also closes the socket later, and in
4400 between Exim writes to the log, which may get opened at this point. When
4401 the socket was closed in ip_connect(), the log could get the same file
4402 descriptor number as the socket. This naturally causes chaos. The fix is
4403 not to close the socket in ip_connect(); the socket should be closed by
4404 the function that creates it. There was only one place in the code where
4405 this was missing, in the iplookup router, which I don't think anybody now
4406 uses, but I've fixed it anyway.
4408 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4409 well as to direct DNS lookups. Otherwise the handling of names in host
4410 lists is inconsistent and therefore confusing.
4416 PH/01 Two changes to the default runtime configuration:
4418 (1) Move the checks for relay_from_hosts and authenticated clients from
4419 after to before the (commented out) DNS black list checks.
4421 (2) Add control=submission to the relay_from_hosts and authenticated
4422 clients checks, on the grounds that messages accepted by these
4423 statements are most likely to be submissions.
4425 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4427 (1) Generate an error if the third argument for the ${prvs expansion is
4430 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4433 (3) Reset the variables that are obtained from the first argument of
4434 ${prvscheck and used in the second argument before leaving the code,
4435 because their memory is reclaimed, so using them afterwards may do
4438 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4439 one (it's much easier than Tom thought :-).
4441 (5) Because of (4), we can now allow for the use of $prvscheck_result
4442 inside the third argument.
4444 PH/03 For some reason, the default setting of PATH when running a command from
4445 a pipe transport was just "/usr/bin". I have changed it to
4448 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4449 anything to be listed in the output from -bV.
4451 PH/05 When a filter generated an autoreply, the entire To: header line was
4452 quoted in the delivery log line, like this:
4454 => >A.N.Other <ano@some.domain> <original@ddress> ...
4456 This has been changed so that it extracts the operative address. There
4457 may be more than one such address. If so, they are comma-separated, like
4460 => >ano@some.domain,ona@other.domain <original@ddress> ...
4462 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4463 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4464 not being looked up in the rDNS to get a host name, Exim was showing the
4465 IP address twice in Received: lines, even though the IP addresses were
4466 identical. For example:
4468 Received: from [1.2.3.4] (helo=[1.2.3.4])
4470 However, if the real host name was known, it was omitting the HELO data
4471 if it matched the actual IP address. This has been tidied up so that it
4472 doesn't show the same IP address twice.
4474 PH/07 When both +timestamp and +memory debugging was on, the value given by
4475 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4476 called by the debug printing, thereby overwriting the timestamp buffer.
4477 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4479 PH/08 When the original message was included in an autoreply transport, it
4480 always said "this is a copy of the message, including all the headers",
4481 even if body_only or headers_only was set. It now gives an appropriate
4484 PH/09 Applied a patch from the Sieve maintainer which:
4486 o fixes some comments
4487 o adds the (disabled) notify extension core
4488 o adds some debug output for the result of if/elsif tests
4489 o points to the current vacation draft in the documentation
4490 and documents the missing references header update
4494 o fixes a bug in processing the envelope test (when testing
4495 multiple envelope elements, the last element determined the
4498 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4499 Electronic Mail") by including:
4501 Auto-submitted: auto-generated
4503 in the messages that it generates (bounce messages and others, such as
4504 warnings). In the case of bounce messages for non-SMTP messages, there was
4505 also a typo: it was using "Auto_submitted" (underscore instead of
4506 hyphen). Since every message generated by Exim is necessarily in response
4507 to another message, thes have all been changed to:
4509 Auto-Submitted: auto-replied
4511 in accordance with these statements in the RFC:
4513 The auto-replied keyword:
4515 - SHOULD be used on messages sent in direct response to another
4516 message by an automatic process,
4518 - MUST NOT be used on manually-generated messages,
4520 - MAY be used on Delivery Status Notifications (DSNs) and Message
4521 Disposition Notifications (MDNs),
4523 - MUST NOT be used on messages generated by automatic or periodic
4524 processes, except for messages which are automatic responses to
4527 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4528 to the default Received: header definition.
4530 PH/12 Added log selector acl_warn_skipped (default on).
4532 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4533 variables because (a) they are in the wrong storage pool and (b) even if
4534 they were copied, it wouldn't work properly because of the caching.
4536 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4537 checking when decoding. Apparently there are clients that generate
4538 overlong encoded strings. Why am I not surprised?
4540 PH/15 If the first argument of "${if match_address" was not empty, but did not
4541 contain an "@" character, Exim crashed. Now it writes a panic log message
4542 and treats the condition as false.
4544 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4546 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4547 extension "envelope-auth". The code is finished and in agreement with
4548 other implementations, but there is no documentation so far and in fact,
4549 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4550 not changing the active code.
4552 Print executed "if" and "elsif" statements when debugging is used. This
4553 helps a great deal to understand what a filter does.
4555 Document more things not specified clearly in RFC3028. I had all this
4556 sorted out, when out of a sudden new issues came to my mind. Oops."
4558 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4561 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4562 canonical form (as documented). However, after a host name lookup from
4563 the IP address, check_host() was doing a simple string comparison with
4564 addresses acquired from the DNS when checking that the found name did
4565 have the original IP as one of its addresses. Since any found IPv6
4566 addresses are likely to be in abbreviated form, the comparison could
4567 fail. Luckily, there already exists a function for doing the comparison
4568 by converting both addresses to binary, so now that is used instead of
4569 the text comparison.
4571 PH/20 There was another similar case to PH/19, when a complete host name was
4572 given in a host list; looking up its IP address could give an abbreviated
4573 form, whereas the current host's name might or might not be abbreviated.
4574 The same fix has been applied.
4580 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4581 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4584 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4585 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4587 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4589 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4590 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4591 Also, for "Auto-Submitted", treat anything other than "no" as
4592 non-personal, in accordance with RFC 3834. (Previously it treated
4593 anything starting "auto-" as non-personal.)
4595 TF/01 The control=submission/name=... option had a problem with syntax
4596 errors if the name included a slash character. The /name= option
4597 now slurps the rest of the string, so it can include any characters
4598 but it must come last in the list of options (after /sender_retain
4601 PH/05 Some modifications to the interface to the fake nameserver for the new
4609 TK/01 Added the "success_on_redirect" address verification option. See
4610 NewStuff for rationale and an example.
4612 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4614 PH/02 Patch to exigrep to allow it to work on syslog lines.
4616 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4617 fread() to skip over the body file's header line, because in Cygwin the
4618 header line is locked and is inaccessible.
4620 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4621 co-exist for some time) to make it clear that it is the Exim ID that is
4622 referenced, not the Message-ID: header line.
4624 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4625 string_format() function, because snprintf() does not exist on all
4628 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4629 ${stat: expansion item.
4631 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4632 protocol synchronization error", to keep the pedants happy.
4634 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4635 well as for IRIX systems, when gcc is being used. See the host.c source
4638 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4640 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4643 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4644 transport and to the smtp transport in LMTP mode.
4646 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4648 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4649 run a filter in a subprocess. This could lead to confusion in subsequent
4650 lookups in the parent process. There should also be a search_tidyup() at
4651 the end of the subprocess.
4653 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4654 only if the host matched helo_try_verify_hosts, which caused the
4655 verification to occur when the EHLO/HELO command was issued. The ACL just
4656 tested the remembered result. Now, if a previous verification attempt has
4657 not happened, "verify = helo" does it there and then.
4659 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4661 TK/03 Fix log output including CR from clamd.
4663 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4664 exist provoked a memory error which could cause a segfault.
4666 PH/15 Installed PCRE 6.2
4668 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4670 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4671 of the problem. Specifically, suggested +O2 rather than +O1 for the
4674 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4676 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4677 record, the port was not correctly logged when the outgoing_port log
4678 selector was set (it logged the transort's default port).
4680 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4681 fallback_hosts, and "hosts" in the smtp transport.
4683 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4684 host errors such as "Connection refused".
4686 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4687 authentication with radiusclient 0.4.9:
4689 - Error returned from rc_read_config was caught wrongly
4690 - Username/password not passed on to radius server due to wrong length.
4692 The presumption is that some radiusclient API changes for 4.51/PH/17
4693 were not taken care of correctly. The code is still untested by me (my
4694 Linux distribution still has 0.3.2 of radiusclient), but it was
4695 contributed by a Radius user.
4697 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4698 expanding the "port" option of the smtp transport.
4700 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4701 while reading a MIME header. Thanks to Tom Hughes for a patch.
4703 PH/24 Include config.h inside local_scan.h so that configuration settings are
4706 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4707 that in an ACL for RCPT (for example), you can examine exactly what was
4710 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4711 commands, but it was not correctly comparing the address with the actual
4712 client host address. Thus, it would show the EHLO address in Received:
4713 header lines when this was not necessary.
4715 PH/27 Added the % operator to ${eval:}.
4717 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4718 it should be ignoring failures (because with -C, for example, it has lost
4719 privilege). It wasn't ignoring creation failures other than "already
4722 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4725 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4726 because an input line was too long, either on its own, or by virtue of
4727 too many continuations, the temporary file was not being removed, and the
4728 return code was incorrect.
4730 PH/31 Missing "BOOL" in function definition in filtertest.c.
4732 PH/32 Applied Sieve patches from the maintainer.
4734 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4736 PH/33 Added "verify = not_blind".
4738 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4739 Local/Makefile (with some defaults set). These are used in built scripts
4740 such as exicyclog, but they have never been used in the exim_install
4741 script (though there are many overriding facilities there). I have
4742 arranged that the exim_install script now takes note of these two
4745 PH/35 Installed configuration files for Dragonfly.
4747 PH/36 When a locally submitted message by a trusted user did not contain a
4748 From: header, and the sender address was obtained from -f or from an SMTP
4749 MAIL command, and the trusted user did not use -F to supply a sender
4750 name, $originator_name was incorrectly used when constructing a From:
4751 header. Furthermore, $originator_name was used for submission mode
4752 messages from external hosts without From: headers in a similar way,
4753 which is clearly wrong.
4755 PH/37 Added control=suppress_local_fixups.
4757 PH/38 When log_selector = +received_sender was set, and the addition of the
4758 sender made the log line's construction buffer exactly full, or one byte
4759 less than full, an overflow happened when the terminating "\n" was
4762 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4763 when the result of a list match is failure because a DNS lookup failed.
4765 PH/40 RM_COMMAND is now used in the building process.
4767 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4768 the "build-* directories that it finds.
4770 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4771 address in a domain literal was a prefix of an interface address.
4773 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4774 when verifying a sender address, unless rewrite_headers is false.
4776 PH/44 Wrote a long comment about why errors_to addresses are verified as
4777 recipients, not senders.
4779 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4780 the ratelimit ACL was added.
4782 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4784 PH/46 Added extra information about PostgreSQL errors to the error string.
4786 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4787 avoiding the need to install special zones in a real server. This is
4788 backwards compatible; if it can't find the fake resolver, it drops back.
4789 Thus, both old and new test suites can be run.
4791 TF/02 Added util/ratelimit.pl
4793 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4794 clock is set back in time.
4796 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4797 Candler <B.Candler@pobox.com>.
4799 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4800 OK for addresses that are the result of redirections.
4802 PH/48 A number of further additions for the benefit of the new test suite,
4803 including a fake gethostbyname() that interfaces to the fake DNS resolver
4806 TF/06 The fix for widen_domains has also been applied to qualify_single and
4807 search_parents which are the other dnslookup options that can cause
4810 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4813 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4815 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4816 service" if it encountered an MX record with an empty target hostname.
4817 The message is now "an MX or SRV record indicated no SMTP service".
4819 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4820 if the DNS of the sending site is misconfigured. This is quite a
4821 common situation. This change restores the behaviour of treating a
4822 helo verification defer as a failure.
4824 PH/51 If self=fail was set on a router, the bounce message did not include the
4825 actual error message.
4831 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4833 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4834 command itself ended in error, the underlying message about the transport
4835 filter timeout was being overwritten with the pipe command error. Now the
4836 underlying error message should be appended to the second error message.
4838 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4840 PH/02 Reduce the amount of output that "make" produces by default. Full output
4841 can still be requested.
4843 PH/03 The warning log line about a condition test deferring for a "warn" verb
4844 was being output only once per connection, rather than after each
4845 occurrence (because it was using the same function as for successful
4846 "warn" verbs). This seems wrong, so I have changed it.
4848 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4849 it should not have, which might have caused a crash in the right
4850 circumstances, but probably never did.
4852 PH/04 Installed a modified version of Tony Finch's patch to make submission
4853 mode fix the return path as well as the Sender: header line, and to
4854 add a /name= option so that you can make the user's friendly name appear
4857 TF/03 Added the control = fakedefer ACL modifier.
4859 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4860 Mark Lowes for thorough testing.
4862 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4864 TK/03 Merged latest SRS patch from Miles Wilton.
4866 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4867 with the definition in sysexits.h (which is #included earlier).
4868 Fortunately, Exim does not actually use EX_OK. The code used to try to
4869 preserve the sysexits.h value, by assuming that macro definitions were
4870 scanned for macro replacements. I have been disabused of this notion,
4871 so now the code just undefines EX_OK before #including unistd.h.
4873 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4874 in the smtp transport. When a block could not be written in a single
4875 write() function, the timeout was being re-applied to each part-write.
4876 This seems wrong - if the receiver was accepting one byte at a time it
4877 would take for ever. The timeout is now adjusted when this happens. It
4878 doesn't have to be particularly precise.
4880 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4881 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4883 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4884 without a domain if the check to <postmaster@domain> fails.
4886 SC/01 Eximstats: added -xls and the ability to specify output files
4887 (patch written by Frank Heydlauf).
4889 SC/02 Eximstats: use FileHandles for outputting results.
4891 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4893 SC/04 Eximstats: fixed display of large numbers with -nvr option
4895 SC/05 Eximstats: fixed merging of reports with empty tables.
4897 SC/06 Eximstats: added the -include_original_destination flag
4899 SC/07 Eximstats: removed tabs and trailing whitespace.
4901 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4903 TK/06 MBOX spool code: Add real "From " MBOX separator line
4904 so the .eml file is really in mbox format (even though
4905 most programs do not really care). Patch from Alex Miller.
4907 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4908 The latter is generated from $received_to and is only set if the
4909 message has one envelope recipient. SA can use these headers,
4910 obviously out-of-the-box. Patch from Alex Miller.
4912 PH/08 The ${def test on a variable was returning false if the variable's
4913 value was "0", contrary to what the specification has always said!
4914 The result should be true unless the variable is empty.
4916 PH/09 The syntax error of a character other than { following "${if
4917 def:variable_name" (after optional whitespace) was not being diagnosed.
4918 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4919 accidental colon was present, for example, could give incorrect results.
4921 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4922 result is used (not including appendfile, where other changes are about
4925 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4926 This involved changing a lot of size variables from int to off_t. It
4927 should work with maildirs and everything.
4929 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4930 spamd dying while we are connected to it.
4932 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4935 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4936 function for BDB 4.3.
4938 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4940 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4941 the sources for PCRE have been re-arranged and more files are now
4944 PH/15 The code I had for printing potentially long long variables in PH/11
4945 above was not the best (it lost precision). The length of off_t variables
4946 is now inspected at build time, and an appropriate printing format (%ld
4947 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4948 to be "long long int" or "long int". This is needed for the internal
4949 formatting function string_vformat().
4951 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4952 the configuration file to be ":syslog", then the script "guesses" where
4953 the logs files are, rather than using the compiled in default. In our
4954 case the guess is not the same as the compiled default, so the script
4955 suddenly stopped working when I started to use syslog. The patch checks
4956 to see if log_file_path is "". If so, it attempts to read it from exim
4957 with no configuration file to get the compiled in version, before it
4958 falls back to the previous guessing code."
4960 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4961 implementing BATV in an Exim configuration. See NewStuff for the gory
4964 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4965 Makefile that are specific to HP-UX.
4967 PH/18 If the "use_postmaster" option was set for a recipient callout together
4968 with the "random" option, the postmaster address was used as the MAIL
4969 FROM address for the random test, but not for the subsequent recipient
4970 test. It is now used for both.
4972 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4973 patch removes a few documentation additions to RFC 3028, because the
4974 latest draft now contains them. It adds the new en;ascii-case comparator
4975 and a new error check for 8bit text in MIME parts. Comparator and
4976 require names are now matched exactly. I enabled the subaddress
4977 extension, but it is not well tested yet (read: it works for me)."
4979 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4980 rework some of the code of TK/09 above to avoid the hardwired use of
4981 "%lld" and "long long". Replaced the call to snprintf() with a call to
4984 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4985 records point to non-existent hosts", "retry timeout exceeded", and
4986 "retry time not reached for any host after a long failure period".
4988 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4989 experimental DomainKeys support:
4991 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4992 (2) On an error such as an illegally used "control", the wrong name for
4993 the control was given.
4995 These problems did NOT occur unless DomainKeys support was compiled.
4997 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4999 PH/24 Added ${if match_ip condition.
5001 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5002 databases so that it will be absolutely obvious if a crash occurs in the
5003 DB library. This is a regular occurrence (often caused by mis-matched
5006 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5007 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5008 picked up on a user's system that detects such things. There doesn't seem
5009 to be a gcc warning option for this - only an attribute that has to be
5010 put on the function's prototype. It seems that in Fedora Core 4 they have
5011 set this on a number of new functions. No doubt there will be more in due
5014 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5015 specify a transport. However, if an address that was verified by such a
5016 router was the subject of a callout, Exim crashed because it tried to
5017 read the rcpt_include_affixes from the non-existent transport. Now it
5018 just assumes that the setting of that option is false. This bug was
5019 introduced by 4.51/PH/31.
5021 PH/28 Changed -d+all to exclude +memory, because that information is very
5022 rarely of interest, but it makes the output a lot bigger. People tend to
5023 do -d+all out of habit.
5025 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5026 code in os-type was giving problems when libc.so lives in lib64, like on
5029 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5030 aren't the modern standard, and it seems that some systems' include files
5031 don't always have them. Exim was already checking for some of the newer
5032 ones like T_AAAA, and defining it itself. I've added checks for all the
5033 record types that Exim uses.
5035 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5036 not automatically generating a new one, as it is supposed to. This
5037 prevented TLS from working. If the file did exist, but contained invalid
5038 data, a new version was generated, as expected. It was only the case of a
5039 non-existent file that was broken.
5041 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5042 with a change in libdomainkeys > 0.64.
5044 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5045 from DNS. If the selector record carries the flag, it now has
5046 precedence over the domain-wide flag.
5048 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5050 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5051 the use of a port name that isn't defined in /etc/services) occurred, the
5052 message was deferred as in a normal delivery, and thus remained on the
5053 spool, instead of being failed because of the mua_wrapper setting. This
5054 is now fixed, and I tidied up some of the mua_wrapper messages at the
5057 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5058 the messages in a hash of arrays rather than using individual hashes.
5059 This is a bit cleaner and results in dramatic memory savings, albeit
5060 at a slight CPU cost.
5062 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5063 as requested by Marc Sherman.
5065 SC/10 Eximstats: added histograms for user specified patterns as requested
5068 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5070 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5071 fopen() in the content-scanning modules that did not already have it.
5077 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5078 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5080 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5082 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5084 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5085 to test Sieve filters that use "vacation".
5087 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5088 that changes the way the GnuTLS parameters are stored in the cache file.
5089 The new format can be generated externally. For backward compatibility,
5090 if the data in the cache doesn't make sense, Exim assumes it has read an
5091 old-format file, and it generates new data and writes a new file. This
5092 means that you can't go back to an older release without removing the
5095 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5096 work if there are any delivery delays because "one_time" forces the
5097 parent to be marked "delivered", so its unseen clone is never tried
5098 again. For this reason, Exim now forbids the simultaneous setting of
5101 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5102 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5103 entry if you want to know the details. The fix, however, neglected to
5104 consider the case when local delivery batching is involved. The test for
5105 "previously delivered" was not happening when checking to see if an
5106 address could be batched with a previous (undelivered) one; under
5107 certain circumstances this could lead to multiple deliveries to the same
5110 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5111 in its include files, and this causes problems building Exim.
5113 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5114 header_syntax) but Exim was just ignoring anything given after a slash.
5115 In particular, this caused confusion with an attempt to use "verify =
5116 reverse_host_lookup/defer_ok". An error is now given when options are
5117 supplied for verify items that do not have them. (Maybe reverse_host_
5118 lookup should have a defer_ok option, but that's a different point.)
5120 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5121 defined by RFC 821) to 2048, because there were problems with some AUTH
5122 commands, and RFC 1869 says the size should be increased for extended
5123 SMTP commands that take arguments.
5125 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5128 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5129 "unknown" error; now it says that the functionality isn't in the binary.
5131 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5132 an address' error message when a string expansion fails (syntax or
5133 whatever). Otherwise the password may appear in the log. Following change
5134 PH/42 below, there is no longer a chance of it appearing in a bounce
5137 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5139 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5140 of its addresses was ever tried. (Bugzilla bug #2.)
5142 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5143 the result incorrectly in the debug output. (It correctly added a newline
5144 to what was transported.)
5146 TF/01 Added $received_time.
5148 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5149 commented out examples of how to interface to a virus scanner and to
5150 SpamAssassin. Also added commented examples of av_scanner and
5151 spamd_address settings.
5153 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5154 and controls are allowed in which ACLs. There were a couple of minor
5155 errors. Some of the entries in the conditions table (which is a table of
5156 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5157 negation of where the condition IS allowed.
5159 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5161 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5162 header file does not have a version number, so I've had to invent a new
5163 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5164 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5165 radiusclient), but it was contributed by a Radius user.
5167 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5168 files or directories, for OpenSSL.
5170 PH/19 When an Exim process that is running as root has to create an Exim log
5171 file, it does so in a subprocess that runs as exim:exim so as to get the
5172 ownership right at creation (otherwise, other Exim processes might see
5173 the file with the wrong ownership). There was no test for failure of this
5174 fork() call, which would lead to the process getting stuck as it waited
5175 for a non-existent subprocess. Forks do occasionally fail when resources
5176 run out. I reviewed all the other calls to fork(); they all seem to check
5179 PH/20 When checking for unexpected SMTP input at connect time (before writing
5180 the banner), Exim was not dealing correctly with a non-positive return
5181 from the read() function. If the client had disconnected by this time,
5182 the result was a log entry for a synchronization error with an empty
5183 string after "input=" when read() returned zero. If read() returned -1
5184 (an event I could not check), uninitialized data bytes were printed.
5185 There were reports of junk text (parts of files, etc) appearing after
5188 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5190 PH/22 Added support for macro redefinition, and (re)definition in between
5191 driver and ACL definitions.
5193 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5194 forgetting to use the resulting value; it was using the unexpanded value.
5196 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5197 hadn't been configured. The fix is from Juergen Kreileder, who
5198 understands it better than I do:
5200 "Here's what I see happening with three configured cyrus_sasl
5201 authenticators configured (plain, login, cram-md5):
5203 On startup auth_cyrus_sasl_init() gets called for each of these.
5204 This means three calls to sasl_listmech() without a specified mech_list.
5205 => SASL tests which mechs of all available mechs actually work
5206 => three warnings about OTP not working
5207 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5209 With the patch, sasl_listmech() also gets called three times. But now
5210 SASL's mech_list option is set to the server_mech specified in the the
5211 authenticator. Or in other words, the answer from sasl_listmech()
5212 gets limited to just the mech you're testing for (which is different
5214 => the return list contains just 'plain' or 'login', 'cram-md5' or
5215 nothing depending on the value of ob->server_mech.
5217 I've just tested the patch: Authentication still works fine,
5218 unavailable mechs specified in the exim configuration are still
5219 caught, and the auth.log warnings about OTP are gone."
5221 PH/25 When debugging is enabled, the contents of the command line are added
5222 to the debugging output, even when log_selector=+arguments is not
5225 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5226 answer is "GNU", and only if the return is "GNU/something" is the answer
5229 PH/27 $acl_verify_message is now set immediately after the failure of a
5230 verification in an ACL, and so is available in subsequent modifiers. In
5231 particular, the message can be preserved by coding like this:
5233 warn !verify = sender
5234 set acl_m0 = $acl_verify_message
5236 Previously, $acl_verify_message was set only while expanding "message"
5237 and "log_message" when a very denied access.
5239 PH/28 Modified OS/os.c-Linux with
5241 -#ifndef OS_LOAD_AVERAGE
5242 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5244 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5245 nomenclature these days.)
5247 PH/29 Installed patch from the Sieve maintainer that adds the options
5248 sieve_useraddress and sieve_subaddress to the redirect router.
5250 PH/30 In these circumstances:
5251 . Two addresses routed to the same list of hosts;
5252 . First host does not offer TLS;
5253 . First host accepts first address;
5254 . First host gives temporary error to second address;
5255 . Second host offers TLS and a TLS session is established;
5256 . Second host accepts second address.
5257 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5258 and peerdn, if requested) that were in fact used only for the second
5261 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5262 attention to any local part prefix or suffix that was matched by the
5263 router that accepted the address. It now behaves in the same way as it
5264 does for delivery: the affixes are removed from the local part unless
5265 rcpt_include_affixes is set on the transport.
5267 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5268 timeout during the DATA phase of an incoming message.
5270 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5271 applied a patch sanctioned by the Sieve maintainer.
5273 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5274 the uid or gid is negative. A case of a negative gid caused this to be
5275 noticed. The fix allows for either to be negative.
5277 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5278 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5281 PH/36 The change PH/12 above was broken. Fixed it.
5283 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5284 the grounds that routing the same address twice would always produce the
5285 same answer. This might have been true once, but it is certainly no
5286 longer true now. Routing a child address may depend on the previous
5287 routing that produced that child. Some complicated redirection strategies
5288 went wrong when messages had multiple recipients, and made Exim's
5289 behaviour dependent on the order in which the addresses were given.
5291 I have moved the duplicate checking until after the routing is complete.
5292 Exim scans the addresses that are assigned to local and remote
5293 transports, and removes any duplicates. This means that more work will be
5294 done, as duplicates will always all be routed, but duplicates are
5295 presumably rare, so I don't expect this is of any significance.
5297 For deliveries to pipes, files, and autoreplies, the duplicate checking
5298 still happens during the routing process, since they are not going to be
5301 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5302 It corrects a timeout issue with spamd. This is Ian's comment: "The
5303 background is that sometimes spamd either never reads data from a
5304 connection it has accepted, or it never writes response data. The exiscan
5305 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5306 blindly assumes that writes won't block so it may never time out."
5308 PH/39 Allow G after quota size as well as K and M.
5310 PH/40 The value set for $authenticated_id in an authenticator may not contain
5311 binary zeroes or newlines because the value is written to log lines and
5312 to spool files. There was no check on this. Now the value is run through
5313 the string_printing() function so that such characters are converted to
5314 printable escape sequences.
5316 PH/41 $message_linecount is a new variable that contains the total number of
5317 lines in the message. Compare $body_linecount, which is the count for the
5320 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5321 bounce and delay warning messages, except in certain special cases, which
5324 (a) An SMTP error message from a remote host;
5325 (b) A message specified in a :fail: redirection;
5326 (c) A message specified in a "fail" command in a system filter;
5327 (d) A message specified in a FAIL return from the queryprogram router;
5328 (e) A message specified by the cannot_route_message router option.
5330 In these cases only, Exim does include the error details in bounce and
5331 warning messages. There are also a few cases where bland messages such
5332 as "unrouteable address" or "local delivery error" are given.
5334 PH/43 $value is now also set for the "else" part of a ${run expansion.
5336 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5337 being worked on, but at least Exim now implements the latest version to
5340 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5341 process to complete was treated as a delivery failure, a timeout while
5342 writing the message to the pipe was logged, but erroneously treated as a
5343 successful delivery. Such timeouts include transport filter timeouts. For
5344 consistency with the overall process timeout, these timeouts are now
5345 treated as errors, giving rise to delivery failures by default. However,
5346 there is now a new Boolean option for the pipe transport called
5347 timeout_defer, which, if set TRUE, converts the failures into defers for
5348 both kinds of timeout. A transport filter timeout is now identified in
5351 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5352 systems where "make" and "gmake" are different, calling "gmake" at top
5353 level broke things. I've arranged for the value of $(MAKE) to be passed
5354 from the Makefile to this script so that it can call the same version of
5358 A note about Exim versions 4.44 and 4.50
5359 ----------------------------------------
5361 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5362 changes of various kinds. As a consequence, a big documentation update was
5363 needed. This delayed the release for rather longer than seemed good, especially
5364 in the light of a couple of (minor) security issues. Therefore, the changes
5365 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5366 release. So 4.44 and 4.50 are in effect two different branches that both start
5369 I have left the 4.50 change log unchanged; it contains all the changes since
5370 4.43. The change log for 4.44 is below; many of its items are identical to
5371 those for 4.50. This seems to be the most sensible way to preserve the
5372 historical information.
5378 1. Minor wording change to the doc/README.SIEVE file.
5380 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5381 computation of the current number of files was incorrect.
5383 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5384 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5387 4. Give more explanation in the error message when the command for a transport
5388 filter fails to execute.
5390 5. There are several places where Exim runs a non-Exim command in a
5391 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5392 was being done only for the command run by the queryprogram router. It is
5393 now done for all such subprocesses. The other cases are: ${run, transport
5394 filters, and the commands run by the lmtp and pipe transports.
5396 6. Added CONFIGURE_GROUP build-time option.
5398 7. Some older OS have a limit of 256 on the maximum number of file
5399 descriptors. Exim was using setrlimit() to set 1000 as a large value
5400 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5401 systems. I've change it so that if it can't get 1000, it tries for 256.
5403 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5404 was an oversight, and furthermore, ever since the addition of extra
5405 controls (e.g. 4.43/32), the checks on when to allow different forms of
5406 "control" were broken. There should now be diagnostics for all cases when a
5407 control that does not make sense is encountered.
5409 9. Added the /retain_sender option to "control=submission".
5411 10. $recipients is now available in the predata ACL (oversight).
5413 11. Tidy the search cache before the fork to do a delivery from a message
5414 received from the command line. Otherwise the child will trigger a lookup
5415 failure and thereby defer the delivery if it tries to use (for example) a
5416 cached ldap connection that the parent has called unbind on.
5418 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5419 of $address_data from the recipient verification was clobbered by the
5420 sender verification.
5422 13. The value of address_data from a sender verification is now available in
5423 $sender_address_data in subsequent conditions in the ACL statement.
5425 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5427 15. Added a new option "connect=<time>" to callout options, to set a different
5430 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5431 was its contents. (It was OK if the option was not defined at all.)
5433 17. A "Completed" log line is now written for messages that are removed from
5434 the spool by the -Mrm option.
5436 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5437 information about exactly what failed.
5439 19. Added -dd to debug only the daemon process.
5441 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5442 handles timeouts, both on the server side and network timeouts. Renamed the
5443 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5445 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5446 It is now set to "smtps".
5448 22. $host_address is now set to the target address during the checking of
5449 ignore_target_hosts.
5451 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5452 being passed; this would have caused $sender_host_name to have been used if
5453 matching the list had actually called for a host name (not very likely,
5454 since this list is usually IP addresses). A host name is now passed as
5457 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5458 code that specifies a non-restarting handler (typically sigaction() in
5459 modern systems) in an attempt to fix a rare and obscure crash bug.
5461 25. Narrowed the window for a race in the daemon that could cause it to ignore
5462 SIGCHLD signals. This is not a major problem, because they are used only to
5463 wake it up if nothing else does.
5465 26. A malformed maildirsize file could cause Exim to calculate negative values
5466 for the mailbox size or file count. Odd effects could occur as a result.
5467 The maildirsize information is now recalculated if the size or filecount
5470 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5471 support for a long time. Removed HAVE_SYS_VFS_H.
5473 28. Installed the latest version of exipick from John Jetmore.
5475 29. In an address list, if the pattern was not a regular expression, an empty
5476 subject address (from a bounce message) matched only if the pattern was an
5477 empty string. Non-empty patterns were not even tested. This was the wrong
5478 because it is perfectly reasonable to use an empty address as part of a
5479 database query. An empty address is now tested by patterns that are
5480 lookups. However, all the other forms of pattern expect the subject to
5481 contain a local part and a domain, and therefore, for them, an empty
5482 address still always fails if the pattern is not itself empty.
5484 30. Exim went into a mad DNS loop when attempting to do a callout where the
5485 host was specified on an smtp transport, and looking it up yielded more
5486 than one IP address.
5488 31. Re-factored the code for checking spool and log partition space into a
5489 function that finds that data and another that does the check. The former
5490 is then used to implement four new variables: $spool_space, $log_space,
5491 $spool_inodes, and $log_inodes.
5493 32. The RFC2047 encoding function was originally intended for short strings
5494 such as real names; it was not keeping to the 75-character limit for
5495 encoded words that the RFC imposes. It now respects the limit, and
5496 generates multiple encoded words if necessary. To be on the safe side, I
5497 have increased the buffer size for the ${rfc2047: expansion operator from
5500 33. It is now permitted to omit both strings after an "if" condition; if the
5501 condition is true, the result is "true". As before, when the second string
5502 is omitted, a false condition yields an empty string. This makes it less
5503 cumbersome to write custom ACL and router conditions.
5505 34. Failure to deliver a bounce message always caused it to be frozen, even if
5506 there was an errors_to setting on the router. The errors_to setting is now
5509 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5510 canonical form (fully expanded) before being placed in
5511 $sender_host_address.
5513 36. The table in the code that translates DNS record types into text (T_A to
5514 "A" for instance) was missing entries for NS and CNAME. It is just possible
5515 that this could have caused confusion if both these types were looked up
5516 for the same domain, because the text type is used as part of Exim's
5517 per-process caching. But the chance of anyone hitting this buglet seems
5520 37. The dnsdb lookup has been extended in a number of ways.
5522 (1) There is a new type, "zns", which walks up the domain tree until it
5523 finds some nameserver records. It should be used with care.
5525 (2) There is a new type, "mxh", which is like "mx" except that it returns
5526 just the host names, not the priorities.
5528 (3) It is now possible to give a list of domains (or IP addresses) to be
5529 looked up. The behaviour when one of the lookups defers can be
5530 controlled by a keyword.
5532 (4) It is now possible to specify the separator character for use when
5533 multiple records are returned.
5535 38. The dnslists ACL condition has been extended: it is now possible to supply
5536 a list of IP addresses and/or domains to be looked up in a particular DNS
5539 39. Added log_selector=+queue_time_overall.
5541 40. When running the queue in the test harness, wait just a tad after forking a
5542 delivery process, to get repeatability of debugging output.
5544 41. Include certificate and key file names in error message when GnuTLS fails
5545 to set them up, because the GnuTLS error message doesn't include the name
5546 of the failing file when there is a problem reading it.
5548 42. Allow both -bf and -bF in the same test run.
5550 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5552 44. The "Exiscan patch" is now merged into the mainline Exim source.
5554 45. Sometimes the final signoff response after QUIT could fail to get
5555 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5556 < 0 before doing a fflush(). This bug looks as though it goes back to the
5557 introduction of TLS in release 3.20, but "sometimes" must have been rare
5558 because the tests only now provoked it.
5560 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5561 (this can affect the format of dates).
5563 47. exim_tidydb, when checking for the continued existence of a message for
5564 which it has found a message-specific retry record, was not finding
5565 messages that were in split spool directories. Consequently, it was
5566 deleting retry records that should have stayed in existence.
5568 48. Steve fixed some bugs in eximstats.
5570 49. The SPA authentication driver was not abandoning authentication and moving
5571 on to the next authenticator when an expansion was forced to fail,
5572 contradicting the general specification for all authenticators. Instead it
5573 was generating a temporary error. It now behaves as specified.
5575 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5576 (the order specifies the preference for clients). The order is now AES256,
5577 AES128, 3DES, ARCFOUR128.
5579 51. Small patch to Sieve code - explicitly set From: when generating an
5582 52. Exim crashed if a remote delivery caused a very long error message to be
5583 recorded - for instance if somebody sent an entire SpamAssassin report back
5584 as a large number of 550 error lines. This bug was coincidentally fixed by
5585 increasing the size of one of Exim's internal buffers (big_buffer) that
5586 happened as part of the Exiscan merge. However, to be on the safe side, I
5587 have made the code more robust (and fixed the comments that describe what
5590 53. Now that there can be additional text after "Completed" in log lines (if
5591 the queue_time_overall log selector is set), a one-byte patch to exigrep
5592 was needed to allow it to recognize "Completed" as not the last thing in
5595 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5596 patch that reportedly fixes this has been added. I am not expert enough to
5597 create a test for it. This is what the patch creator wrote:
5599 "I found a little strange behaviour of ldap code when working with
5600 Windows 2003 AD Domain, where users was placed in more than one
5601 Organization Units. When I tried to give exim partial DN, the exit code
5602 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5603 But simultaneously result of request was absolutely normal ldap result,
5604 so I produce this patch..."
5606 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5607 REFERENCE, so I have modified the code to exclude the patch when that macro
5610 55. Some experimental protocols are using DNS PTR records for new purposes. The
5611 keys for these records are domain names, not reversed IP addresses. The
5612 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5613 leaves it alone. Component reversal etc. now happens only for IP addresses.
5616 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5618 57. Double the size of the debug message buffer (to 2048) so that more of very
5619 long debug lines gets shown.
5621 58. The exicyclog utility now does better if the number of log files to keep
5622 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5624 59. Two changes related to the smtp_active_hostname option:
5626 (1) $smtp_active_hostname is now available as a variable.
5627 (2) The default for smtp_banner uses $smtp_active_hostname instead
5628 of $primary_hostname.
5630 60. The host_aton() function is supposed to be passed a string that is known
5631 to be a valid IP address. However, in the case of IPv6 addresses, it was
5632 not checking this. This is a hostage to fortune. Exim now panics and dies
5633 if the condition is not met. A case was found where this could be provoked
5634 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5635 components; fortuitously, this particular loophole had already been fixed
5636 by change 4.50/55 above.
5638 If there are any other similar loopholes, the new check in host_aton()
5639 itself should stop them being exploited. The report I received stated that
5640 data on the command line could provoke the exploit when Exim was running as
5641 exim, but did not say which command line option was involved. All I could
5642 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5643 running as the user.
5646 61. There was a buffer overflow vulnerability in the SPA authentication code
5647 (which came originally from the Samba project). I have added a test to the
5648 spa_base64_to_bits() function which I hope fixes it.
5651 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5652 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5654 63. The daemon start-up calls getloadavg() while still root for those OS that
5655 need the first call to be done as root, but it missed one case: when
5656 deliver_queue_load_max is set with deliver_drop_privilege. This is
5657 necessary for the benefit of the queue runner, because there is no re-exec
5658 when deliver_drop_privilege is set.
5660 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5661 This has been fixed.
5663 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5664 was in use, was not putting the data itself into the right store pool;
5665 consequently, it could be overwritten for a subsequent message in the same
5666 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5669 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5671 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5672 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5673 the function were treating the return as a boolean value, which happened to
5674 work because 0=false and not-0=true, but is not correct code.
5676 68. The host_aton() function was not handling scoped IPv6 addresses (those
5677 with, for example, "%eth0" on the end) correctly.
5679 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5680 negated items (that is, ~something) in unsigned ints. Some compilers
5681 apparently mutter when there is no cast.
5683 70. If an address verification called from an ACL failed, and did not produce a
5684 user-specific message (i.e. there was only a "system" message), nothing was
5685 put in $acl_verify_message. In this situation, it now puts the system
5688 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5689 session; change 4.31/43 added the unwanted input to the log line - except
5690 that it did not do this in the start of session case. It now does.
5692 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5693 This is wrong and can cause the other end to generate a synchronization
5694 error if it is another Exim or anything else that does the synchronization
5695 check. A QUIT command is no longer sent after a timeout.
5697 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5698 during host lookups.
5700 74. The defer_ok option of callout verification was not working if it was used
5701 when verifying addresses in header lines, that is, for this case:
5703 verify = header_sender/callout=defer_ok
5705 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5706 those file descriptors could be used for SMTP connections. If anything
5707 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5708 could be sent to the SMTP client, causing chaos. The daemon now opens
5709 stdin, stdout, and stderr to /dev/null when it puts itself into the
5712 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5713 log by default. The user can override this with suitable Perl magic.
5715 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5716 the log message when discard triggers, was not working for the DATA ACL or
5717 for the non-SMTP ACL.
5719 78. Error message wording change in sieve.c.
5721 79. If smtp_accept_max_per_host was set, the number of connections could be
5722 restricted to fewer than expected, because the daemon was trying to set up
5723 a new connection before checking whether the processes handling previous
5724 connections had finished. The check for completed processes is now done
5725 earlier. On busy systems, this bug wouldn't be noticed because something
5726 else would have woken the daemon, and it would have reaped the completed
5729 80. If a message was submitted locally by a user whose login name contained one
5730 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5731 It caused a spool format error. I have fixed the spool reading code. A
5732 related problem was that the "from" clause in the Received: line became
5733 illegal because of the space(s). It is now covered by ${quote_local_part.
5735 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5738 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5740 83. Patch from Sieve maintainer to fix unterminated string problem in
5741 "vacation" handling.
5743 84. Some minor changes to the Linux configuration files to help with other
5744 OS variants using glibc.
5746 85. One more patch for Sieve to update vacation handling to latest spec.
5749 ----------------------------------------------------
5750 See the note above about the 4.44 and 4.50 releases.
5751 ----------------------------------------------------
5757 1. Change 4.43/35 introduced a bug that caused file counts to be
5758 incorrectly computed when quota_filecount was set in an appendfile
5761 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5762 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5765 3. Give more explanation in the error message when the command for a transport
5766 filter fails to execute.
5768 4. There are several places where Exim runs a non-Exim command in a
5769 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5770 was being done only for the command run by the queryprogram router. It is
5771 now done for all such subprocesses. The other cases are: ${run, transport
5772 filters, and the commands run by the lmtp and pipe transports.
5774 5. Some older OS have a limit of 256 on the maximum number of file
5775 descriptors. Exim was using setrlimit() to set 1000 as a large value
5776 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5777 systems. I've change it so that if it can't get 1000, it tries for 256.
5779 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5780 was an oversight, and furthermore, ever since the addition of extra
5781 controls (e.g. 4.43/32), the checks on when to allow different forms of
5782 "control" were broken. There should now be diagnostics for all cases when a
5783 control that does not make sense is encountered.
5785 7. $recipients is now available in the predata ACL (oversight).
5787 8. Tidy the search cache before the fork to do a delivery from a message
5788 received from the command line. Otherwise the child will trigger a lookup
5789 failure and thereby defer the delivery if it tries to use (for example) a
5790 cached ldap connection that the parent has called unbind on.
5792 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5793 of $address_data from the recipient verification was clobbered by the
5794 sender verification.
5796 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5797 was its contents. (It was OK if the option was not defined at all.)
5799 11. A "Completed" log line is now written for messages that are removed from
5800 the spool by the -Mrm option.
5802 12. $host_address is now set to the target address during the checking of
5803 ignore_target_hosts.
5805 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5806 being passed; this would have caused $sender_host_name to have been used if
5807 matching the list had actually called for a host name (not very likely,
5808 since this list is usually IP addresses). A host name is now passed as
5811 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5812 code that specifies a non-restarting handler (typically sigaction() in
5813 modern systems) in an attempt to fix a rare and obscure crash bug.
5815 15. Narrowed the window for a race in the daemon that could cause it to ignore
5816 SIGCHLD signals. This is not a major problem, because they are used only to
5817 wake it up if nothing else does.
5819 16. A malformed maildirsize file could cause Exim to calculate negative values
5820 for the mailbox size or file count. Odd effects could occur as a result.
5821 The maildirsize information is now recalculated if the size or filecount
5824 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5825 support for a long time. Removed HAVE_SYS_VFS_H.
5827 18. Updated exipick to current release from John Jetmore.
5829 19. Allow an empty sender to be matched against a lookup in an address list.
5830 Previously the only cases considered were a regular expression, or an
5833 20. Exim went into a mad DNS lookup loop when doing a callout where the
5834 host was specified on the transport, if the DNS lookup yielded more than
5837 21. The RFC2047 encoding function was originally intended for short strings
5838 such as real names; it was not keeping to the 75-character limit for
5839 encoded words that the RFC imposes. It now respects the limit, and
5840 generates multiple encoded words if necessary. To be on the safe side, I
5841 have increased the buffer size for the ${rfc2047: expansion operator from
5844 22. Failure to deliver a bounce message always caused it to be frozen, even if
5845 there was an errors_to setting on the router. The errors_to setting is now
5848 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5849 canonical form (fully expanded) before being placed in
5850 $sender_host_address.
5852 24. Updated eximstats to version 1.33
5854 25. Include certificate and key file names in error message when GnuTLS fails
5855 to set them up, because the GnuTLS error message doesn't include the name
5856 of the failing file when there is a problem reading it.
5858 26. Expand error message when OpenSSL has problems setting up cert/key files.
5861 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5862 (this can affect the format of dates).
5864 28. exim_tidydb, when checking for the continued existence of a message for
5865 which it has found a message-specific retry record, was not finding
5866 messages that were in split spool directories. Consequently, it was
5867 deleting retry records that should have stayed in existence.
5869 29. eximstats updated to version 1.35
5870 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5871 1.35 - bugfix such that pie charts by volume are generated correctly
5873 30. The SPA authentication driver was not abandoning authentication and moving
5874 on to the next authenticator when an expansion was forced to fail,
5875 contradicting the general specification for all authenticators. Instead it
5876 was generating a temporary error. It now behaves as specified.
5878 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5879 (the order specifies the preference for clients). The order is now AES256,
5880 AES128, 3DES, ARCFOUR128.
5882 31. Small patch to Sieve code - explicitly set From: when generating an
5885 32. Exim crashed if a remote delivery caused a very long error message to be
5886 recorded - for instance if somebody sent an entire SpamAssassin report back
5887 as a large number of 550 error lines. This bug was coincidentally fixed by
5888 increasing the size of one of Exim's internal buffers (big_buffer) that
5889 happened as part of the Exiscan merge. However, to be on the safe side, I
5890 have made the code more robust (and fixed the comments that describe what
5893 33. Some experimental protocols are using DNS PTR records for new purposes. The
5894 keys for these records are domain names, not reversed IP addresses. The
5895 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5896 leaves it alone. Component reversal etc. now happens only for IP addresses.
5899 34. The host_aton() function is supposed to be passed a string that is known
5900 to be a valid IP address. However, in the case of IPv6 addresses, it was
5901 not checking this. This is a hostage to fortune. Exim now panics and dies
5902 if the condition is not met. A case was found where this could be provoked
5903 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5904 components; fortuitously, this particular loophole had already been fixed
5905 by change 4.50/55 or 4.44/33 above.
5907 If there are any other similar loopholes, the new check in host_aton()
5908 itself should stop them being exploited. The report I received stated that
5909 data on the command line could provoke the exploit when Exim was running as
5910 exim, but did not say which command line option was involved. All I could
5911 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5912 running as the user.
5915 35. There was a buffer overflow vulnerability in the SPA authentication code
5916 (which came originally from the Samba project). I have added a test to the
5917 spa_base64_to_bits() function which I hope fixes it.
5920 36. The daemon start-up calls getloadavg() while still root for those OS that
5921 need the first call to be done as root, but it missed one case: when
5922 deliver_queue_load_max is set with deliver_drop_privilege. This is
5923 necessary for the benefit of the queue runner, because there is no re-exec
5924 when deliver_drop_privilege is set.
5926 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5927 was in use, was not putting the data itself into the right store pool;
5928 consequently, it could be overwritten for a subsequent message in the same
5929 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5932 38. Sometimes the final signoff response after QUIT could fail to get
5933 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5934 < 0 before doing a fflush(). This bug looks as though it goes back to the
5935 introduction of TLS in release 3.20, but "sometimes" must have been rare
5936 because the tests only now provoked it.
5942 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5943 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5944 Now it returns an integer. A number of calls were still expecting a T/F
5945 return. Fortuitously, in all cases, the tests worked in OK situations,
5946 which is the norm. However, things would have gone wrong on any write
5947 failures on the smtp file descriptor. This function is used when sending
5948 messages over SMTP and also when doing verify callouts.
5950 2. When Exim is called to do synchronous delivery of a locally submitted
5951 message (the -odf or -odi options), it no longer closes stderr before doing
5954 3. Implemented the mua_wrapper option.
5956 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5958 5. Implemented the functions header_remove(), header_testname(),
5959 header_add_at_position(), and receive_remove_recipient(), and exported them
5962 6. If an ACL "warn" statement specified the addition of headers, Exim already
5963 inserted X-ACL-Warn: at the start if there was no header name. However, it
5964 was not making this test for the second and subsequent header lines if
5965 there were newlines in the string. This meant that an invalid header could
5966 be inserted if Exim was badly configured.
5968 7. Allow an ACL "warn" statement to add header lines at the start or after all
5969 the Received: headers, as well as at the end.
5971 8. Added the rcpt_4xx retry error code.
5973 9. Added postmaster_mailfrom=xxx to callout verification option.
5975 10. Added mailfrom=xxxx to the callout verification option, for verify=
5978 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5979 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5981 12. Inserted some casts to stop certain compilers warning when using pointer
5982 differences as field lengths or precisions in printf-type calls (mostly
5983 affecting debugging statements).
5985 13. Added optional readline() support for -be (dynamically loaded).
5987 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5988 same clock tick as a message's arrival, so that its received time was the
5989 same as the "first fail" time on the retry record, and that message
5990 remained on the queue past the ultimate address timeout, every queue runner
5991 would try a delivery (because it was past the ultimate address timeout) but
5992 after another failure, the ultimate address timeout, which should have then
5993 bounced the address, did not kick in. This was a "< instead of <=" error;
5994 in most cases the first failure would have been in the next clock tick
5995 after the received time, and all would be well.
5997 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5998 being recognized when the domain list was tested by the match_domain
5999 condition in an expansion string.
6001 16. Added the ${str2b64: operator.
6003 17. Exim was always calling setrlimit() to set a large limit for the number of
6004 processes, without checking whether the existing limit was already
6005 adequate. (It did check for the limit on file descriptors.) Furthermore,
6006 errors from getrlimit() and setrlimit() were being ignored. Now they are
6007 logged to the main and panic logs, but Exim does carry on, to try to do its
6008 job under whatever limits there are.
6010 18. Imported PCRE 5.0.
6012 19. Trivial typo in log message " temporarily refused connection" (the leading
6015 20. If the log selector return_path_on_delivery was set and an address was
6016 redirected to /dev/null, the delivery process crashed because it assumed
6017 that a return path would always be set for a "successful" delivery. In this
6018 case, the whole delivery is bypassed as an optimization, and therefore no
6021 21. Internal re-arrangement: the function for sending a challenge and reading
6022 a response while authentication was assuming a zero-terminated challenge
6023 string. It's now changed to take a pointer and a length, to allow for
6024 binary data in such strings.
6026 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6028 23. Exim was not respecting finduser_retries when seeking the login of the
6029 uid under which it was called; it was always trying 10 times. (The default
6030 setting of finduser_retries is zero.) Also, it was sleeping after the final
6031 failure, which is pointless.
6033 24. Implemented tls_on_connect_ports.
6035 25. Implemented acl_smtp_predata.
6037 26. If the domain in control=submission is set empty, Exim assumes that the
6038 authenticated id is a complete email address when it generates From: or
6039 Sender: header lines.
6041 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6042 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6043 chown and chgrp in /bin and hostname in /usr/bin.
6045 28. Exim was keeping the "process log" file open after each use, just as it
6046 does for the main log. This opens the possibility of it remaining open for
6047 long periods when the USR1 signal hits a daemon. Occasional processlog
6048 errors were reported, that could have been caused by this. Anyway, it seems
6049 much more sensible not to leave this file open at all, so that is what now
6052 29. The long-running daemon process does not normally write to the log once it
6053 has entered its main loop, and it closes the log before doing so. This is
6054 so that log files can straightforwardly be renamed and moved. However,
6055 there are a couple of unusual error situations where the daemon does write
6056 log entries, and I had neglected to close the log afterwards.
6058 30. The text of an SMTP error response that was received during a remote
6059 delivery was being truncated at 512 bytes. This is too short for some of
6060 the long messages that one sometimes sees. I've increased the limit to
6063 31. It is now possible to make retry rules that apply only when a message has a
6064 specific sender, in particular, an empty sender.
6066 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6067 it possible to be selective about when SMTP synchronization is enforced.
6069 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6071 32. Implemented hosts_connection_nolog.
6073 33. Added an ACL for QUIT.
6075 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6078 35. Added mailbox_size and mailbox_filecount to appendfile.
6080 36. Added control = no_multiline_responses to ACLs.
6082 37. There was a bug in the logic of the code that waits for the clock to tick
6083 in the case where the clock went backwards by a substantial amount such
6084 that the microsecond fraction of "now" was more than the microsecond
6085 fraction of "then" (but the whole seconds number was less).
6087 38. Added support for the libradius Radius client library this is found on
6088 FreeBSD (previously only the radiusclient library was supported).
6094 1. When certain lookups returned multiple values in the form name=value, the
6095 quoting of the values was not always being done properly. Specifically:
6096 (a) If the value started with a double quote, but contained no whitespace,
6098 (b) If the value contained whitespace other than a space character (i.e.
6099 tabs or newlines or carriage returns) it was not quoted.
6100 This fix has been applied to the mysql and pgsql lookups by writing a
6101 separate quoting function and calling it from the lookup code. The fix
6102 should probably also be applied to nisplus, ibase and oracle lookups, but
6103 since I cannot test any of those, I have not disturbed their existing code.
6105 2. A hit in the callout cache for a specific address caused a log line with no
6106 reason for rejecting RCPT. Now it says "Previous (cached) callout
6107 verification failure".
6109 3. There was an off-by-one bug in the queryprogram router. An over-long
6110 return line was truncated at 256 instead of 255 characters, thereby
6111 overflowing its buffer with the terminating zero. As well as fixing this, I
6112 have increased the buffer size to 1024 (and made a note to document this).
6114 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6115 when Exim is waiting for an SMTP response from a remote server, Exim
6116 restarts its select() call on the socket, thereby resetting its timeout.
6117 This is not a problem when such interrupts are rare. Somebody set up a cron
6118 job to run exiwhat every 2 minutes, which is less than the normal select()
6119 timeout (5 or 10 minutes). This meant that the select() timeout never
6120 kicked in because it was always reset. I have fixed this by comparing the
6121 time when an interrupt arrives with the time at the start of the first call
6122 to select(). If more time than the timeout has elapsed, the interrupt is
6123 treated as a timeout.
6125 5. Some internal re-factoring in preparation for the addition of Sieve
6126 extensions (by MH). In particular, the "personal" test is moved to a
6127 separate function, and given an option for scanning Cc: and Bcc: (which is
6128 not set for Exim filters).
6130 6. When Exim created an email address using the login of the caller as the
6131 local part (e.g. when creating a From: or Sender: header line), it was not
6132 quoting the local part when it contained special characters such as @.
6134 7. Installed new OpenBSD configuration files.
6136 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6137 try to make them clearer.
6139 9. Callout options, other than the timeout value, were being ignored when
6140 verifying sender addresses in header lines. For example, when using
6142 verify = header_sender/callout=no_cache
6144 the cache was (incorrectly) being used.
6146 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6147 only the Cygwin environment.
6149 11. When return_path_on_delivery was set as a log selector, if different remote
6150 addresses in the same message used different return paths and parallel
6151 remote delivery occurred, the wrong values would sometimes be logged.
6152 (Whenever a remote delivery process finished, the return path value from
6153 the most recently started remote delivery process was logged.)
6155 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6156 lines when AUTH and/or TLS are in use. This is the "received protocol"
6157 field. Exim used to use "asmtp" for authenticated SMTP, without any
6158 indication (in the protocol name) for TLS use. Now it follows the RFC and
6159 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6160 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6161 names appear in log lines as well as in Received: header lines.
6163 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6164 extensions, and comparison tests, and to fix some bugs.
6166 14. Changes to the "personal" filter test:
6168 (1) The test was buggy in that it was just doing the equivalent of
6169 "contains" tests on header lines. For example, if a user's address was
6170 anne@some.where, the "personal" test would incorrectly be true for
6172 To: susanne@some.where
6174 This test is now done by extracting each address from the header in turn,
6175 and checking the entire address. Other tests that are part of "personal"
6176 are now done using regular expressions (for example, to check local parts
6177 of addresses in From: header lines).
6179 (2) The list of non-personal local parts in From: addresses has been
6180 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6181 taken from the Sieve specification recommendations.
6183 (3) If the message contains any header line starting with "List-" it is
6184 treated as non-personal.
6186 (4) The test for "circular" in the Subject: header line has been removed
6187 because it now seems ill-conceived.
6189 15. Minor typos in src/EDITME comments corrected.
6191 16. Installed latest exipick from John Jetmore.
6193 17. If headers_add on a router specified a text string that was too long for
6194 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6195 of string_sprintf() is now avoided.
6197 18. $message_body_size was not set (it was always zero) when running the DATA
6198 ACL and the local_scan() function.
6200 19. For the "mail" command in an Exim filter, no default was being set for
6201 the once_repeat time, causing a random time value to be used if "once" was
6202 specified. (If the value happened to be <= 0, no repeat happened.) The
6203 default is now 0s, meaning "never repeat". The "vacation" command was OK
6204 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6205 (I found it when inspecting the code).
6207 20. There is now an overall timeout for performing a callout verification. It
6208 defaults to 4 times the callout timeout, which applies to individual SMTP
6209 commands during the callout. The overall timeout applies when there is more
6210 than one host that can be tried. The timeout is checked before trying the
6211 next host. This prevents very long delays if there are a large number of
6212 hosts and all are timing out (e.g. when the network connections are timing
6213 out). The value of the overall timeout can be changed by specifying an
6214 additional sub-option for "callout", called "maxwait". For example:
6216 verify = sender/callout=5s,maxwait=20s
6218 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6219 to the end before writing, but this should make it even safer).
6221 22. Exim was forgetting that it had advertised PIPELINING for the second and
6222 subsequent messages on an SMTP connection. It was also not resetting its
6223 memory on STARTTLS and an internal HELO.
6225 23. When Exim logs an SMTP synchronization error within a session, it now
6226 records whether PIPELINING has been advertised or not.
6228 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6229 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6230 rather than long int.
6232 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6234 26. Added the never_mail option to autoreply.
6240 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6241 crash if the getsockname() call failed; this can happen if a connection is
6242 closed very soon after it is established. The problem was simply in the
6243 order in which certain operations were done, causing Exim to try to write
6244 to the SMTP stream before it had set up the file descriptor. The bug has
6245 been fixed by making things happen in the correct order.
6251 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6252 before the connection was closed, thus losing the rejection response.
6254 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6255 some early Solaris releases, but causes trouble in current releases where
6256 socklen_t is defined.
6258 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6261 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6264 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6265 that releasing the top of it at the end releases what was used for sub-
6266 expansions (unless the block got too big). However, discard this block if
6267 the first thing is a variable or header, so that we can use its block when
6268 it is dynamic (useful for very large $message_headers, for example).
6270 6. Lookups now cache *every* query, not just the most recent. A new, separate
6271 store pool is used for this. It can be recovered when all lookup caches are
6272 flushed. Lookups now release memory at the end of their result strings.
6273 This has involved some general refactoring of the lookup sources.
6275 7. Some code has been added to the store_xxx() functions to reduce the amount
6276 of flapping under certain conditions.
6278 8. log_incoming_interface used to affect only the <= reception log lines. Now
6279 it causes the local interface and port to be added to several more SMTP log
6280 lines, for example "SMTP connection from", and rejection lines.
6282 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6284 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6286 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6287 could be overwritten at the end of the current message (or the start of a
6288 new message if it was set in a HELO ACL). The value is now preserved for
6289 the duration of the SMTP connection.
6291 12. If a transport had a headers_rewrite setting, and a matching header line
6292 contained an unqualified address, that address was qualified, even if it
6293 did not match any rewriting rules. The underlying bug was that the values
6294 of the flags that permit the existence of unqualified sender and recipient
6295 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6296 non-local messages, and by -bnq for local messages) were not being
6297 preserved with the message after it was received.
6299 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6300 "next input=" as part of the text comprising the host identity instead of
6301 the correct text. The code was using the same buffer for two different
6302 strings. However, depending on which order the printing function evaluated
6303 its arguments, the bug did not always show up. Under Linux, for example, my
6304 test suite worked just fine.
6306 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6307 doesn't work with some older versions of Perl. It has been changed to "my",
6308 which in any case is probably the better facility to use.
6310 15. A really picky compiler found some instances of statements for creating
6311 error messages that either had too many or two few arguments for the format
6314 16. The size of the buffer for calls to the DNS resolver has been increased
6315 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6316 for addresses that have a lot of PTR records. This alleviates a problem; it
6317 does not fully solve it.
6319 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6320 buffer now truncates the list and logs the incident, which is the same
6321 action as happens when Exim is looking up a host name and its aliases.
6322 Previously in this situation something unpredictable would happen;
6323 sometimes it was "internal error: store_reset failed".
6325 18. If a server dropped the connection unexpectedly when an Exim client was
6326 using GnuTLS and trying to read a response, the client delivery process
6327 crashed while trying to generate an error log message.
6329 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6330 string, for example:
6332 warn message = H1: something\nH2: something
6334 the text was added as a single header line from Exim's point of view
6335 though it ended up OK in the delivered message. However, searching for the
6336 second and subsequent header lines using $h_h2: did not work. This has been
6337 fixed. Similarly, if a system filter added multiple headers in this way,
6338 the routers could not see them.
6340 20. Expanded the error message when iplsearch is called with an invalid key to
6341 suggest using net-iplsearch in a host list.
6343 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6344 ACLs are no longer actually imposed (and a message to that effect is
6347 22. If a "gecos" field in a passwd entry contained escaped characters, in
6348 particular, if it contained a \" sequence, Exim got it wrong when building
6349 a From: or a Sender: header from that name. A second bug also caused
6350 incorrect handling when an unquoted " was present following a character
6351 that needed quoting.
6353 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6354 was not being matched caselessly.
6356 24. Arranged for all hyphens in the exim.8 source to be escaped with
6359 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6360 properly. Recipient callout cache records were still being keyed to include
6361 the sender, even when use_sender was set false. This led to far more
6362 callouts that were necessary. The sender is no longer included in the key
6363 when use_sender is false.
6365 26. Added "control = submission" modifier to ACLs.
6367 27. Added the ${base62d: operator to decode base 62 numbers.
6369 28. dnsdb lookups can now access SRV records.
6371 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6372 the configuration file.
6374 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6375 (-v) mode. This makes the output for a verbose queue run more intelligible.
6377 31. Added a use_postmaster feature to recipient callouts.
6379 32. Added the $body_zerocount variable, containing the number of binary zero
6380 bytes in the message body.
6382 33. The time of last modification of the "new" subdirectory is now used as the
6383 "mailbox time last read" when there is a quota error for a maildir
6386 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6388 35. Added +ignore_unknown as a special item in host lists.
6390 36. Code for decoding IPv6 addresses in host lists is now included, even if
6391 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6392 address was recognized as an IP address, but was then not correctly decoded
6393 into binary, causing unexpected and incorrect effects when compared with
6400 1. Very minor rewording of debugging text in manualroute to say "list of
6401 hosts" instead of "hostlist".
6403 2. If verify=header_syntax was set, and a header line with an unqualified
6404 address (no domain) and a large number of spaces between the end of the
6405 name and the colon was received, the reception process suffered a buffer
6406 overflow, and (when I tested it) crashed. This was caused by some obsolete
6407 code that should have been removed. The fix is to remove it!
6409 3. When running in the test harness, delay a bit after writing a bounce
6410 message to get a bit more predictability in the log output.
6412 4. Added a call to search_tidyup() just before forking a reception process. In
6413 theory, someone could use a lookup in the expansion of smtp_accept_max_
6414 per_host which, without the tidyup, could leave open a database connection.
6416 5. Added the variables $recipient_data and $sender_data which get set from a
6417 lookup success in an ACL "recipients" or "senders" condition, or a router
6418 "senders" option, similar to $domain_data and $local_part_data.
6420 6. Moved the writing of debug_print from before to after the "senders" test
6423 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6424 problems for message scanning, either using a data ACL, or using
6425 local_scan() because the Received: header was not generated till after they
6426 were called (in order to set the time as the time of reception completion).
6427 I have revised the way this works. The header is now generated after the
6428 body is received, but before the ACL or local_scan() are called. After they
6429 are run, the timestamp in the header is updated.
6435 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6436 before starting a queue runner without re-exec. This happened only when
6437 deliver_drop_privilege was set or when the Exim user was set to root. The
6438 effect of the bug was that timeouts during subsequent deliveries caused
6439 crashes instead of being properly handled. The handler is now left at its
6440 default (and expected) setting.
6442 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6443 message, again when deliver_drop_privilege is set or Exim is run as root.
6444 The bug described in (1) was not present in this case, but the tidying up
6445 of the other signals was missing. I have made the two cases consistent.
6447 3. The ignore_target_hosts setting on a manualroute router was being ignored
6448 for hosts that were looked up using the /MX notation.
6450 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6453 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6454 operated on the sender address. After changing the $sender_address to <>
6455 for the sender address verify, Exim was re-instated it as the original
6456 (before rewriting) address, but remembering that it had rewritten it, so it
6457 wasn't rewriting it again. This bug also had the effect of breaking the
6458 sender address verification caching when the sender address was rewritten.
6460 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6461 This has been changed so that if the ip literal address matches
6462 ignore_target_hosts, the router declines.
6464 7. Added expansion conditions match_domain, match_address, and match_local_
6465 part (NOT match_host).
6467 8. The placeholder for the Received: header didn't have a length field set.
6469 9. Added code to Exim itself and to exim_lock to test for a specific race
6470 condition that could lead to file corruption when using MBX delivery. The
6471 issue is with the lockfile that is created in /tmp. If this file is removed
6472 after a process has opened it but before that process has acquired a lock,
6473 there is the potential for a second process to recreate the file and also
6474 acquire a lock. This could lead to two Exim processes writing to the file
6475 at the same time. The added code performs the same test as UW imapd; it
6476 checks after acquiring the lock that its file descriptor still refers to
6477 the same named file.
6479 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6480 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6483 11. Added the smtp_active_hostname option. If used, this will typically be made
6484 to depend on the incoming interface address. Because $interface_address is
6485 not set up until the daemon has forked a reception process, error responses
6486 that can happen earlier (such as "too many connections") no longer contain
6489 12. If an expansion in a condition on a "warn" statement fails because a lookup
6490 defers, the "warn" statement is abandoned, and the next ACL statement is
6491 processed. Previously this caused the whole ACL to be aborted.
6493 13. Added the iplsearch lookup type.
6495 14. Added ident_timeout as a log selector.
6497 15. Added tls_certificate_verified as a log selector.
6499 16. Added a global option tls_require_ciphers (compare the smtp transport
6500 option of the same name). This controls incoming TLS connections.
6502 17. I finally figured out how to make tls_require_ciphers do a similar thing
6503 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6504 before starting the TLS session.
6506 18. Tabs are now shown as \t in -bP output.
6508 19. If the log selector return_path_on_delivery was set, Exim crashed when
6509 bouncing a message because it had too many Received: header lines.
6511 20. If two routers both had headers_remove settings, and the first one included
6512 a superfluous trailing colon, the final name in the first list and the
6513 first name in the second list were incorrectly joined into one item (with a
6514 colon in the middle).
6520 1. Added -C and -D options to the exinext utility, mainly to make it easier
6521 to include in the automated testing, but these could be helpful when
6522 multiple configurations are in use.
6524 2. The exinext utility was not formatting the output nicely when there was
6525 an alternate port involved in the retry record key, nor when there was a
6526 message id as well (for retries that were specific to a specific message
6527 and a specific host). It was also confused by IPv6 addresses, because of
6528 the additional colons they contain. I have fixed the IPv4 problem, and
6529 patched it up to do a reasonable job for IPv6.
6531 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6532 delivery, the log line now contains "pipelined" if PIPELINING was used.
6534 4. An SMTP transport process used to panic and die if the bind() call to set
6535 an explicit outgoing interface failed. This has been changed; it is now
6536 treated in the same way as a connect() failure.
6538 5. A reference to $sender_host_name in the part of a conditional expansion
6539 that was being skipped was still causing a DNS lookup. This no longer
6542 6. The def: expansion condition was not recognizing references to header lines
6543 that used bh_ and bheader_.
6545 7. Added the _cache feature to named lists.
6547 8. The code for checking quota_filecount in the appendfile transport was
6548 allowing one more file than it should have been.
6550 9. For compatibility with Sendmail, the command line option
6558 and sets the incoming protocol and host name (for trusted callers). The
6559 host name and its colon can be omitted when only the protocol is to be set.
6560 Note the Exim already has two private options, -pd and -ps, that refer to
6561 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6562 "s", but I don't think that's a major issue.
6564 10. A number of refactoring changes to the code, none of which should affect
6567 (a) The number of logging options was getting close to filling up the
6568 32-bit word that was used as a bit map. I have split them into two classes:
6569 those that are passed in the argument to log_write(), and those that are
6570 only ever tested independently outside of that function. These are now in
6571 separate 32-bit words, so there is plenty of room for expansion again.
6572 There is no change in the user interface or the logging behaviour.
6574 (b) When building, for example, log lines, the code previously used a
6575 macro that called string_cat() twice, in order to add two strings. This is
6576 not really sufficiently general. Furthermore, there was one instance where
6577 it was actually wrong because one of the argument was used twice, and in
6578 one call a function was used. (As it happened, calling the function twice
6579 did not affect the overall behaviour.) The macro has been replaced by a
6580 function that can join an arbitrary number of extra strings onto a growing
6583 (c) The code for expansion conditions now uses a table and a binary chop
6584 instead of a serial search (which was left over from when there were very
6585 few conditions). Also, it now recognizes conditions like "pam" even when
6586 the relevant support is not compiled in: a suitably worded error message is
6587 given if an attempt is made to use such a condition.
6589 11. Added ${time_interval:xxxxx}.
6591 12. A bug was causing one of the ddress fields not to be passed back correctly
6592 from remote delivery subprocesses. The field in question was not being
6593 subsequently used, so this caused to problems in practice.
6595 13. Added new log selectors queue_time and deliver_time.
6597 14. Might have fixed a bug in maildirsizefile handling that threw up
6598 "unexpected character" debug warnings, and recalculated the data
6599 unnecessarily. In any case, I expanded the warning message to give more
6602 15. Added the message "Restricted characters in address" to the statements in
6603 the default ACL that block characters like @ and % in local parts.
6605 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6606 Three changes have been made:
6608 (a) There was a serious bug; a negative response to MAIL caused the whole
6609 recipient domain to be cached as invalid, thereby blocking all messages
6610 to all local parts at the same domain, from all senders. This bug has
6611 been fixed. The domain is no longer cached after a negative response to
6612 MAIL if the sender used is not empty.
6614 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6617 (c) A new callout option, "use_sender" has been added for people who want
6618 the modified behaviour.
6624 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6627 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6628 indeed breaks things for older releases.
6630 3. Added additional logging to the case where there is a problem reading data
6631 from a filter that is running in a subprocess using a pipe, in order to
6632 try to track down a specific problem.
6634 4. Testing facility fudge: when running in the test harness and attempting
6635 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6636 getting "No route to host". Convert this to a timeout.
6638 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6641 6. Some OS don't have socklen_t but use size_t instead. This affects the
6642 fifth argument of getsockopt() amongst other things. This is now
6643 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6644 can be set for individual OS. I have set it for SunOS5, OSF1, and
6645 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6646 some earlier ones do not.
6648 7. Change 4.30/15 was not doing the test caselessly.
6650 8. The standard form for an IPv6 address literal was being rejected by address
6651 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6652 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6653 this, as well as the form without the "IPv6" on the front (but only when
6654 address literals are enabled, of course).
6656 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6658 10. Exim crashed if a message with an empty sender address specified by -f
6659 encountered a router with an errors_to setting. This could be provoked only
6660 by a command such as
6664 where an empty string was supplied; "<>" did not hit this bug.
6666 11. Installed PCRE release 4.5.
6668 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6669 remained set. It is now erased.
6671 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6672 times from message ids (which are base 36 rather than the normal 62).
6674 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6675 were being counted as actual protocol errors, and logged if the log
6676 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6677 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6678 and DATA following a set of rejected RCPTs do not count as protocol errors.
6679 In other words, Exim assumes they were pipelined, though this may not
6680 actually be the case. Of course, in all cases the client gets an
6681 appropriate error code.
6683 15. If a lookup fails in an ACL condition, a message about the failure may
6684 be available; it is used if testing the ACL cannot continue, because most
6685 such messages specify what the cause of the deferral is. However, some
6686 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6687 that caused an old message to be retained and used if a later statement
6688 caused a defer, replacing the real cause of the deferral.
6690 16. If an IP address had so many PTR records that the DNS lookup buffer
6691 was not large enough to hold them, Exim could crash while trying to process
6692 the truncated data. It now detects and logs this case.
6694 17. Further to 4.21/58, another change has been made: if (and only if) the
6695 first line of a message (the first header line) ends with CRLF, a bare LF
6696 in a subsequent header line has a space inserted after it, so as not to
6697 terminate the header.
6699 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6700 unnecessarily, used atoi() instead of strtol(), and didn't check the
6701 termination when getting file sizes from file names by regex.
6703 19. Completely re-implemented the support for maildirsize files, in the light
6704 of a number of problems with the previous contributed implementation
6705 (4.30/29). In particular:
6707 . If the quota is zero, the maildirsize file is maintained, but no quota is
6710 . If the maildir directory does not exist, it is created before any attempt
6711 to write a maildirsize file.
6713 . The quota value in the file is just a cache; if the quota is changed in
6714 the transport, the new value overrides.
6716 . A regular expression is available for excluding directories from the
6719 20. The autoreply transport checks the characters in options that define the
6720 message's headers; it allows continued headers, but it was checking with
6721 isspace() after an embedded newline instead of explicitly looking for a
6724 21. If all the "regular" hosts to which an address was routed had passed their
6725 expiry times, and had not reached their retry times, the address was
6726 bounced, even if fallback hosts were defined. Now Exim should go on to try
6729 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6730 equivalent code in the SMTP transport. Some hosts send humungous responses
6731 to HELO/EHLO, more than 1024 it seems.
6733 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6734 gives compiler warnings in some environments. I've now done it "properly",
6737 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6738 (because of problems with the built-in one) was declared to return uschar *
6739 instead of char *, causing compiler failure.
6741 25. Fixed a file descriptor leak when processing alias/forward files.
6743 26. Fixed a minor format string issue in dbfn.c.
6745 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6747 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6748 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6751 29. When a sender address is verified, it is cached, to save repeating the test
6752 when there is more than one recipient in a message. However, when the
6753 verification involves a callout, it is possible for different callout
6754 options to be set for different recipients. It is too complicated to keep
6755 track of this in the cache, so now Exim always runs a verification when a
6756 callout is required, relying on the callout cache for the optimization.
6757 The overhead is duplication of the address routing, but this should not be
6760 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6761 to be verified with callout=postmaster, and the main callout worked but the
6762 postmaster check failed, the verification correctly failed. However, if a
6763 subsequent RCPT command asked for sender verification *without* the
6764 postmaster check, incorrect caching caused this verification also to fail,
6767 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6768 it was not caching the DNS options (qualify_single, search_parents) that
6769 were used when the lookup failed. A subsequent lookup with different
6770 options therefore always gave the same answer, though there were cases
6771 where it should not have. (Example: a "domains = !$mx_any" option on a
6772 dnslookup router: the "domains" option is always processed without any
6773 widening, but the router might have qualify_single set.) Now Exim uses the
6774 cached value only when the same options are set.
6776 32. Added John Jetmore's "exipick" utility to the distribution.
6778 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6779 than a timeout (e.g. a certificate is required, and is not provided), an
6780 Exim server now closes the connection immediately. Previously it waited for
6781 the client to close - but if the client is SSL, it seems that they each
6782 wait for each other, leading to a delay before one of them times out.
6784 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6785 maintained 0.8.x compatibility because I don't think many are using it, and
6786 it is clearly obsolete.
6788 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6791 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6792 client certificate was expired. A simple patch fixes this, though I don't
6793 understand the full logic of why the verify callback is called multiple
6796 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6797 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6798 which causes problems with some clients (such as the Certicom SSL Plus
6799 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6800 disables the coutermeasure allowing Eudora to connect."
6802 38. Exim was not checking that a write() to a log file succeeded. This could
6803 lead to Bad Things if a log got too big, in particular if it hit a file
6804 size limit. Exim now panics and dies if it cannot write to a log file, just
6805 as it does if it cannot open a log file.
6807 39. Modified OS/Makefile-Linux so that it now contains
6809 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6811 The two -D definitions ensure that Exim is compiled with large file
6812 support, which makes it possible to handle log files that are bigger than
6815 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6816 instance) a domain was checked against a named list that involved a lookup,
6817 causing $domain_data to be set, then another domain was checked against the
6818 same list, then the first domain was re-checked, the value of $domain_data
6819 after the final check could be wrong. In particular, if the second check
6820 failed, it could be set empty. This bug probably also applied to
6823 41. The strip_trailing_dot option was not being applied to the address given
6824 with the -f command-line option.
6826 42. The code for reading a message's header from the spool was incrementing
6827 $received_count, but never initializing it. This meant that the value was
6828 incorrect (doubled) while delivering a message in the same process in which
6829 it was received. In the most common configuration of Exim, this never
6830 happens - a fresh exec is done - but it can happen when
6831 deliver_drop_privilege is set.
6833 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6834 it now includes up to 150 characters of the unexpected data in the log
6837 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6838 and building data strings. The size of both of these buffers was 10 000
6839 bytes - far larger than anybody would *ever* want, thought I. Needless to
6840 say, somebody hit the limit. I have increased the maximum line length to
6841 20 000 and the maximum data length of concatenated lines to 100 000. I have
6842 also fixed two bugs, because there was no checking on these buffers. Tsk,
6843 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6844 buffer is too small.
6846 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6847 lsearch lookups. Now it does.
6849 46. When parsing a route_list item in a manualroute router, a fixed-length
6850 buffer was used for the list of hosts. I made this 1024 bytes long,
6851 thinking that nobody would ever have a list of hosts that long. Wrong.
6852 Somebody had a whole pile of complicated expansion conditions, and the
6853 string was silently truncated, leading to an expansion error. It turns out
6854 that it is easier to change to an unlimited length (owing to other changes
6855 that have happened since this code was originally written) than to build
6856 structure for giving a limitation error. The length of the item that
6857 expands into the list of hosts is now unlimited.
6859 47. The lsearch lookup could not handle data where the length of text line was
6860 more than 4095 characters. Such lines were truncated, leading to shortened
6861 data being returned. It should now handle lines of any length.
6863 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6864 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6867 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6868 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6869 no longer happens in comment lines. A list of replacements is now placed
6870 at the head of all of the source files, except those whose only change is
6871 to replace PERL_COMMAND in the very first #! line.
6873 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6874 messages on the queue, with a bottom-up merge sort, using code contributed
6875 by Michael Haardt. This should make operations like -bp somewhat faster on
6876 large queues. It won't affect queue runners, except when queue_run_in_order
6879 51. Installed eximstats 1.31 in the distribution.
6881 52. Added support for SRV lookups to the dnslookup router.
6883 53. If an ACL referred to $message_body or $message_body_end, the value was not
6884 reset for any messages that followed in the same SMTP session.
6886 54. The store-handling optimization for building very long strings was not
6887 differentiating between the different store pools. I don't think this
6888 actually made any difference in practice, but I've tidied it.
6890 55. While running the routers to verify a sender address, $sender_address
6891 was still set to the sender address. This is wrong, because when routing to
6892 send a bounce to the sender, it would be empty. Therefore, I have changed
6893 it so that, while verifying a sender address, $sender_address is set to <>.
6894 (There is no change to what happens when verifying a recipient address.)
6896 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6897 target A or AAAA records (if not already returned) without resetting the
6898 qualify_single or search_parents options of the DNS resolver. These are
6899 inappropriate in this case because the targets of MX and SRV records must
6900 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6901 target that, when qualified, matched something in the local domain. These
6902 two options are now turned off when doing these lookups.
6904 57. It seems that at least some releases of Reiserfs (which does not have the
6905 concept of a fixed number of inodes) returns zero and not -1 for the
6906 number of available inodes. This interacted badly with check_spool_inodes,
6907 which assumed that -1 was the "no such thing" setting. What I have done is
6908 to check that the total number of inodes is greater than zero before doing
6909 the test of how many are available.
6911 58. When a "warn" ACL statement has a log_message modifier, the message is
6912 remembered, and not repeated. This is to avoid a lot of repetition when a
6913 message has many recipients that cause the same warning to be written.
6914 However, Exim was preserving the list of already written lines for an
6915 entire SMTP session, which doesn't seem right. The memory is now reset if a
6916 new message is started.
6918 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6919 debugging output unless log_rewrite was also set.
6921 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6922 of (int)(handle) when we know that handle contains (void *)(-1).
6924 61. The Exim daemon panic-logs an error return when it closes the incoming
6925 connection. However "connection reset by peer" seems to be common, and
6926 isn't really an error worthy of noting specially, so that particular error
6929 62. When Exim is trying to find all the local interfaces, it used to panic and
6930 die if the ioctl to get the interface flags failed. However, it seems that
6931 on at least one OS (Solaris 9) it is possible to have an interface that is
6932 included in the list of interfaces, but for which you get a failure error
6933 for this call. This happens when the interface is not "plumbed" into a
6934 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6935 failure of the "get flags" call assumes that the interface is down.
6937 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6938 makes life easier for people who are doing arithmetic on fields extracted
6939 from dates, where you often get leading zeros that should not be
6940 interpreted as octal.
6942 64. Added qualify_domain to the redirect router, to override the global
6945 65. If a pathologically long header line contained very many addresses (the
6946 report of this problem mentioned 10 000) and each of them was rewritten,
6947 Exim could use up a very large amount of memory. (It kept on making new
6948 copies of the header line as it rewrote, and never released the old ones.)
6949 At the expense of a bit more processing, the header rewriting function has
6950 been changed so that it no longer eats memory in this way.
6952 66. The generation of the Received: header has been moved from the time that a
6953 message starts to be received, to the time that it finishes. The timestamp
6954 in the Received: header should now be very close to that of the <= log
6955 line. There are two side-effects of this change:
6957 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6958 logged header lines no longer include the local Received: line, because
6959 it has not yet been created. The same applies to a copy of the message
6960 that is returned to a non-SMTP sender when a message is rejected.
6962 (b) When a filter file is tested using -bf, no additional Received: header
6963 is added to the test message. After some thought, I decided that this
6966 This change does not affect the value of $received_for. It is still set
6967 after address rewriting, but before local_scan() is called.
6969 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6971 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6972 gave an unhelpful panic error message, and a defer error. I have managed to
6973 change this behaviour so that it now rejects any supplied certificate,
6974 which seems right, as the list of acceptable certificates is empty.
6976 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6977 gave an unhelpful defer error. I have not managed to make this reject any
6978 supplied certificates, but the error message it gives is "no certificate
6979 supplied", which is not helpful.
6981 70. exigrep's output now also includes lines that are not associated with any
6982 message, but which match the given pattern. Implemented by a patch from
6983 Martin Sluka, which also tidied up the Perl a bit.
6985 71. Recipient callout verification, like sender verification, was using <> in
6986 the MAIL FROM command. This isn't really the right thing, since the actual
6987 sender may affect whether the remote host accepts the recipient or not. I
6988 have changed it to use the actual sender in the callout; this means that
6989 the cache record is now keyed on a recipient/sender pair, not just the
6990 recipient address. There doesn't seem to be a real danger of callout loops,
6991 since a callout by the remote host to check the sender would use <>.
6992 [SEE ABOVE: changed after hitting problems.]
6994 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6995 temporary errors. However, in the case of such a code being given after
6996 the end of a data transmission (i.e. after ".") Exim was failing to write
6997 a retry record for the message. (Yes, there was some broken host that was
6998 actually sending 8xx at this point.)
7000 73. An unknown lookup type in a host list could cause Exim to panic-die when
7001 the list was checked. (An example that provoked this was putting <; in the
7002 middle of a list instead of at the start.) If this happened during a DATA
7003 ACL check, a -D file could be left lying around. This kind of configuration
7004 error no longer causes Exim to die; instead it causes a defer error. The
7005 incident is still logged to the main and panic logs.
7007 74. Buglet left over from Exim 3 conversion. The message "too many messages
7008 in one connection" was written to the rejectlog but not the mainlog, except
7009 when address rewriting (yes!) was being logged.
7011 75. Added write_rejectlog option.
7013 76. When a system filter was run not as root (that is, when system_filter_user
7014 was set), the values of the $n variables were not being returned to the
7015 main process; thus, they were not subsequently available in the $sn
7018 77. Added +return_path_on_delivery log selector.
7020 78. A connection timeout was being treated differently from recipients deferred
7021 when testing hosts_max_try with a message that was older than the host's
7022 retry timeout. (The host should not be counted, thus allowing all hosts to
7023 be tried at least once before bouncing.) This may have been the cause of an
7024 occasionally reported bug whereby a message would remain on the queue
7025 longer than the retry timeout, but would be bounced if a delivery was
7026 forced. I say "may" because I never totally pinned down the problem;
7027 setting up timeout/retry tests is difficult. See also the next item.
7029 79. The ultimate address timeout was not being applied to errors that involved
7030 a combination of host plus message (for example, a timeout on a MAIL
7031 command). When an address resolved to a number of possible hosts, and they
7032 were not all tried for each delivery (e.g. because of hosts_max_try), a
7033 message could remain on the queue longer than the retry timeout.
7035 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7038 81. Fixed an obscure SMTP outgoing bug which required at least the following
7039 conditions: (a) there was another message waiting for the same server;
7040 (b) the server returned 5xx to all RCPT commands in the first message so
7041 that the message was not completed; (c) the server dropped the connection
7042 or gave a negative response to the RSET that Exim sends to abort the
7043 transaction. The observed case was a dropped connection after DATA that had
7044 been sent in pipelining mode. That is, the server had advertised PIPELINING
7045 but was not implementing it correctly. The effect of the bug was incorrect
7046 behaviour, such as trying another host, and this could lead to a crash.
7052 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7053 and daemon.c were passed as pointers to ints; they should have been
7054 pointers to socklen_t variables (which are typically unsigned ints).
7056 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7059 3. Fixed a really odd bug that affected only the testing scheme; patching a
7060 certain fixed string in the binary changed the value of another string that
7061 happened to be identical to the end of the original first string.
7063 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7064 name", it returns that address as the IP address. On some operating
7065 systems (e.g. Solaris), it also passes back the IP address string as the
7066 "host name". However, on others (e.g. Linux), it passes back an empty
7067 string. Exim wasn't checking for this, and was changing the host name to an
7068 empty string, assuming it had been canonicalized.
7070 5. Although rare, it is permitted to have more than one PTR record for a given
7071 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7072 all the names associated with an address, because they do in Solaris.
7073 However, it seems that they do not in Linux for data that comes from the
7074 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7075 I found this out when I moved to a new Linux workstation and tried to run
7076 the Exim test suite.
7078 To get round this problem I have changed the code so that it now does its
7079 own call to the DNS to look up PTR records when searching for a host name.
7080 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7081 addresses that are only in /etc/hosts are still found.
7083 This behaviour is, however, controlled by an option called host_lookup_
7084 order, which defaults to "bydns:byaddr". If people want to use the other
7085 order, or indeed, just use one or the other means of lookup, they can
7086 specify it in this variable.
7088 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7089 some operating systems, this comes back from gethostbyaddr() as an empty
7090 string, and this is what Exim used to test for. However, it seems that in
7091 other systems, "." is yielded. Exim now tests for this case too.
7093 7. The values of check_spool_space and check_log_space are now held internally
7094 as a number of kilobytes instead of an absolute number of bytes. If a
7095 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7096 kilobyte. This means that much larger values can be stored.
7098 8. Exim monitor: an attempt to get the action menu when not actually pointing
7099 at a message produces an empty menu entitled "No message selected". This
7100 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7101 no entries in it ("Shell widget menu has zero width and/or height"). So I
7102 have added a single, blank menu entry in this case.
7104 9. Added ${quote_local_part.
7106 10. MIME decoding is now applied to the contents of Subject: header lines when
7109 11. Now that a reference to $sender_host_address automatically causes a reverse
7110 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7111 host lookup before query-style lookups in lists that might use this
7112 variable. This has therefore been abolished, and the "net-" prefix is no
7113 longer necessary for query-style lookups.
7115 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7116 have been a typo for LFLAGS, so it has been changed.
7118 13. The install script calls Exim with "-C /dev/null" in order to find the
7119 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7120 to be output. However, since Exim outputs its version number before the
7121 error, it didn't break the script. It just looked ugly. I fixed this by
7122 always allowing "-C /dev/null" if the caller is root.
7124 14. Ignore overlarge ACL variable number when reading spool file - insurance
7125 against a later release with more variables having written the file.
7127 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7128 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7129 this, as well as the form without the "IPv6" on the front.
7131 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7132 OS/Makefile-Darwin file.
7134 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7135 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7137 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7138 variable. However, some OS use ints for inodes. I've added cast to long int
7139 to get rid of the compiler warning.
7141 19. I had forgotten to lock out "/../" in configuration file names when
7142 ALT_CONFIG_PREFIX was set.
7144 20. Routers used for verification do not need to specify transports. However,
7145 if such a router generated a host list, and callout was configured, Exim
7146 crashed, because it could not find a port number from the (non-existent)
7147 transport. It now assumes port 25 in this circumstance.
7149 21. Added the -t option to exigrep.
7151 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7152 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7153 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7154 them is set, LOOKUP_LSEARCH is forced.
7156 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7158 24. Added sender and host information to the "rejected by local_scan()" log
7159 line; previously there was no indication of these.
7161 25. Added .include_if_exists.
7163 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7164 Linux. It turns out that not all file systems support this. Apparently some
7165 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7166 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7167 not supported on the file descriptor, is now ignored when Exim is trying to
7168 sync a directory. This applies only to Linux.
7170 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7172 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7173 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7176 29. Added support for maildirsize files from supplied patch (modified a bit).
7178 30. The use of :fail: followed by an empty string could lead Exim to respond to
7179 sender verification failures with (e.g.):
7181 550 Verification failed for <xxx>
7182 550 Sender verify failed
7184 where the first response line was missing the '-' that indicates it is not
7185 the final line of the response.
7187 31. The loop for finding the name of the user that called Exim had a hardwired
7188 limit of 10; it now uses the value of finduser_retries, which is used for
7189 all other user lookups.
7191 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7194 33. Exim was neglecting to zero errno before one call of strtol() when
7195 expanding a string and expecting an integer value. On some systems this
7196 resulted in spurious "integer overflow" errors. Also, it was casting the
7197 result into an int without checking.
7199 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7200 did not work. The code looks as if it has *never* worked, though it appears
7201 to have been documented since at least release 1.62. I have made it work.
7203 35. The "timeout_DNS" error in retry rules, also documented since at least
7204 1.62, also never worked. As it isn't clear exactly what this means, and
7205 clearly it isn't a major issue, I have abolished the feature by treating it
7206 as "timeout", and writing a warning to the main and panic logs.
7208 36. The display of retry rules for -brt wasn't always showing the error code
7211 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7212 timeout_connect_A, timeout_connect_MX.
7214 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7215 to the empty sender.
7217 39. The daemon was not analysing the content of -oX till after it had closed
7218 stderr and disconnected from the controlling terminal. This meant that any
7219 syntax errors were only noted on the panic log, and the return code from
7220 the command was 0. By re-arranging the code a little, I've made the
7221 decoding happen first, so such errors now appear on stderr, and the return
7222 code is 1. However, the actual setting up of the sockets still happens in
7223 the disconnected process, so errors there are still only recorded on the
7226 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7227 connections (as happens on some IP stacks) was logged at start up time as
7228 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7229 it from "IPv6 and IPv4", which means that two separate sockets are being
7232 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7233 says whether AF_INET or AF_INET6 was passed as an argument.
7235 42. Exiwhat output was messed up when time zones were included in log
7238 43. Exiwhat now gives more information about the daemon's listening ports,
7239 and whether -tls-on-connect was used.
7241 44. The "port" option of the smtp transport is now expanded.
7243 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7244 silently ignored. Now an error message is written to the main and panic
7247 46. There's a new ACL modifier called "logwrite" which writes to a log file
7248 as soon as it is encountered.
7250 47. Added $local_user_uid and $local_user_gid at routing time.
7252 48. Exim crashed when trying to verify a sender address that was being
7255 49. Exim was recognizing only a space character after ".include". It now also
7256 recognizes a tab character.
7258 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7259 extracting the relevant information from the specification. The man page no
7260 longer contains scrambled data for the -d option, and I've added a section
7261 at the front about calling Exim under different names.
7263 51. Added "extra_headers" argument to the "mail" command in filter files.
7265 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7268 53. Installed eximstats 1.29.
7270 54. Added transport_filter_timeout as a generic transport option.
7272 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7273 Cc: header lines. This was required by RFC 822, but it not required by RFC
7276 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7277 incoming messages that did not have them. Now it does so only if the
7278 message originates locally, that is, if there is no associated remote host
7279 address. When Resent- header lines are present, this applies to the Resent-
7280 lines rather than the non-Resent- lines.
7282 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7283 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7285 58. Messages for configuration errors now include the name of the main
7286 configuration file - useful now that there may be more than one file in a
7287 list (.included file names were always shown).
7289 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7290 for those rare installations that do not start the daemon as root or run it
7291 setuid root. I've cut out the call to initgroups() if the daemon is not
7294 60. The Exim user and group can now be bound into the binary as text strings
7295 that are looked up at the start of Exim's processing.
7297 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7299 62. Added $mailstore_basename variable.
7301 63. Installed patch to sieve.c from Michael Haardt.
7303 64. When Exim failed to open the panic log after failing to open the main log,
7304 the original message it was trying to log was written to stderr and debug
7305 output, but if they were not available (the usual case in production), it
7306 was lost. Now it is written to syslog before the two lines that record the
7307 failures to open the logs.
7309 65. Users' Exim filters run in subprocesses under the user's uid. It is
7310 possible for a "deliver" command or an alias in a "personal" command to
7311 provoke an address rewrite. If logging of address rewriting is configured,
7312 this fails because the process is not running as root or exim. There may be
7313 a better way of dealing with this, but for the moment (because 4.30 needs
7314 to be released), I have disabled address rewrite logging when running a
7315 filter in a non-root, non-exim process.
7321 1. The buildconfig auxiliary program wasn't quoting the value set for
7322 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7323 not defined. This bug was masked in 4.22 by the effect that was fixed in
7326 2. Some messages that were rejected after a message id was allocated were
7327 shown as "incomplete" by exigrep. It no longer does this for messages that
7328 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7330 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7331 have allow_domain_literals set, the ID did not get logged in the <= line.
7332 Domain literals are now always recognized in Message-ID: header lines.
7334 4. The first argument for a ${extract expansion item is the key name or field
7335 number. Leading and trailing spaces in this item were not being ignored,
7336 causing some misleading effects.
7338 5. When deliver_drop_privilege was set, single queue runner processes started
7339 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7340 same command in the process it spins off) were not dropping privilege.
7342 6. When the daemon running as "exim" started a queue runner, it always
7343 re-executed Exim in the spun-off process. This is a waste of effort when
7344 deliver_drop_privilege is set. The new process now just calls the
7345 queue-runner function directly.
7351 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7354 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7355 ignored. Though the use of -oP was forcing the writing of a pid file, it
7356 was always written to the default place.
7358 3. If the message "no IP address found for host xxxx" is generated during
7359 incoming verification, it is now followed by identification of the incoming
7360 connection (so you can more easily find what provoked it).
7362 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7364 5. Added some features to "harden" Exim a bit more against certain attacks:
7366 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7367 be put in Local/Makefile. This is like the never_users runtime option,
7368 but it cannot be overridden. The default setting is "root".
7370 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7371 prefix string with which any file named in a -C command line option
7374 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7375 is retained for -C and -D only if the caller of Exim is root. Without
7376 it, the exim user may also use -C and -D and retain privilege.
7378 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7379 command line option is disabled.
7381 6. Macro names set by the -D option must start with an upper case letter, just
7382 like macro names defined in the configuration file.
7384 7. Added "dereference=" facility to LDAP.
7386 8. Two instances of the typo "uknown" in the source files are fixed.
7388 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7389 the Configure-Makefile script screwed up while processing it.
7391 10. Incorporated PCRE 4.4.
7393 11. The SMTP synchronization check was not operating right at the start of an
7394 SMTP session. For example, it could not catch a HELO sent before the client
7395 waited for the greeting. There is now a check for outstanding input at the
7396 point when the greeting is written. Because of the duplex, asynchronous
7397 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7398 way, but not yet received, when the check is performed.
7400 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7401 on TCP/IP sockets, because this apparently causes some broken clients to
7404 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7405 unchanged) from the Cygwin maintainer.
7407 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7408 was supported instead of testing for mbx. Effectively a typo.
7410 15. The spa authenticator server code was not checking that the input it
7411 received was valid base64.
7413 16. The debug output line for the "set" modifier in ACLs was not showing the
7414 name of the variable that was being set.
7416 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7418 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7419 lookup on its own. Something else was needed to trigger the lookup. For
7420 example, a match in host_lookup or the need for a host name in a host list.
7421 Now, if $sender_host_name is referenced and the host name has not yet been
7422 looked up, a lookup is performed. If the lookup fails, the variable remains
7423 empty, and $host_lookup_failed is set to "1".
7425 19. Added "eqi" as a case-independent comparison operator.
7427 20. The saslauthd authentication condition could segfault if neither service
7428 nor realm was specified.
7430 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7431 error message that was logged was misleading, and incoming SMTP
7432 connections were dropped. The message is now more accurate, and temporary
7433 errors are given to SMTP connections.
7435 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7436 (except RSET) with a 421 error, until QUIT is received. However, it was
7437 failing to send a response to QUIT.
7439 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7440 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7441 ACL is now run after the helo_try_verify_hosts code.
7443 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7444 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7445 case-independent, so other case variants are also recognized). Apparently
7446 some systems use these upper case variants.
7448 25. If more than two messages were waiting for the same host, and a transport
7449 filter was specified for the transport, Exim sent two messages over the
7450 same TCP/IP connection, and then failed with "socket operation on non-
7451 socket" when it tried to send the third.
7453 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7455 27. The extern definition of crypt16() in expand.c was not being excluded when
7456 the OS had its own crypt16() function.
7458 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7459 as a preferred synonym for return_size_limit, both as an option and as an
7462 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7464 30. Changed the default configuration ACL to relax the local part checking rule
7465 for addresses that are not in any local domains. For these addresses,
7466 slashes and pipe symbols are allowed within local parts, but the sequence
7467 /../ is explicitly forbidden.
7469 31. SPA server authentication was not clearing the challenge buffer before
7472 32. log_message in a "warn" ACL statement was writing to the reject log as
7473 well as to the main log, which contradicts the documentation and doesn't
7474 seem right (because no rejection is happening). So I have stopped it.
7476 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7477 However, I am unable to do any testing of this.
7479 34. Fixed an infelicity in the appendfile transport. When checking directories
7480 for a mailbox, to see if any needed to be created, it was accidentally
7481 using path names with one or more superfluous leading slashes; tracing
7482 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7484 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7485 contents are added to the log line that is written for every discarded
7486 recipient. (Previously a log_message setting was ignored.)
7488 36. The ${quote: operator now quotes the string if it is empty.
7490 37. The install script runs exim in order to find its version number. If for
7491 some reason other than non-existence or emptiness, which it checks, it
7492 could not run './exim', it was installing it with an empty version number,
7493 i.e. as "exim-". This error state is now caught, and the installation is
7496 38. An argument was missing from the function that creates an error message
7497 when Exim fails to connect to the socket for saslauthd authentication.
7498 This could cause Exim to crash, or give a corrupted message.
7500 39. Added isip, isip4, and isip6 to ${if conditions.
7502 40. The ACL variables $acl_xx are now saved with the message, and can be
7503 accessed later in routers, transports, and filters.
7505 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7506 strings in the file are not string-expanded.
7508 42. If a MAIL command specified a SIZE value that was too large to fit into an
7509 int variable, the check against message_size_limit failed. Such values are
7510 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7511 day this will have to be increased, but I don't think I want to be around
7512 when emails are that large.
7519 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7520 iconv() is not standard in FreeBSD.
7522 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7523 IPv6 enabled. The observed symptom was a segmentation fault on return from
7524 the function os_common_find_running_interfaces() in src/os.c.
7526 3. In the check_special_case() function in daemon.c I had used "errno" as an
7527 argument name, which causes warnings on some systems. This was basically a
7528 typo, since it was named "eno" in the comments!
7530 4. The code that waits for the clock to tick (at a resolution of some fraction
7531 of a second) so as to ensure message-id uniqueness was always waiting for
7532 at least one whole tick, when it could have waited for less. [This is
7533 almost certainly not relevant at current processor speeds, where it is
7534 unlikely to ever wait at all. But we try to future-proof.]
7536 5. The function that sleeps for a time interval that includes fractions of a
7537 second contained a race. It did not block SIGALRM between setting the
7538 timer, and suspending (a couple of lines later). If the interval was short
7539 and the sigsuspend() was delayed until after it had expired, the suspension
7540 never ended. On busy systems this could lead to processes getting stuck for
7543 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7544 process, before it forks any delivery processes. The open lookup caching
7545 mechanism meant that the open file or database connection was passed into
7546 the delivery process. The problem was that delivery processes always tidy
7547 up cached lookup data. This could cause a problem for the next delivery
7548 process started by the queue runner, because the external queue runner
7549 process does not know about the closure. So the next delivery process
7550 still has data in the lookup cache. In the case of a file lookup, there was
7551 no problem because closing a file descriptor in a subprocess doesn't affect
7552 the parent. However, if the lookup was caching a connection to a database,
7553 the connection was closed, and the second delivery process was likely to
7554 see errors such as "PGSQL: query failed: server closed the connection
7555 unexpectedly". The problem has been fixed by closing all cached lookups
7556 in a queue runner before running a delivery process.
7558 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7559 seem to have the "const" qualifier which it has on other OS. I've
7562 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7563 *of the same type* (client or server) with the same public name that an
7564 error should be diagnosed.
7566 9. When Exim looked up a host name for an IP address, but failed to find the
7567 original IP address when looking up the host name (a safety check), it
7568 output the message "<ip address> does not match any IP for NULL", which was
7569 confusing, to say the least. The bug was that the host name should have
7570 appeared instead of "NULL".
7572 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7573 user that is built into the binary, and the -C or -D options is used, root
7574 privilege is dropped before the configuration file is read. In addition,
7575 logging is switched to stderr instead of the normal log files. If the
7576 configuration then re-defines the Exim user, the unprivileged environment
7577 is probably not what is expected, so Exim logs a panic warning message (but
7580 However, if deliver_drop_privilege is set, the unprivileged state may well
7581 be exactly what is intended, so the warning has been cut out in that case,
7582 and Exim is allowed to try to write to its normal log files.
7588 1. smtp_return_error_details was not giving details for temporary sender
7589 or receiver verification errors.
7591 2. Diagnose a configuration error if two authenticators have the same public
7594 3. Exim used not to create the message log file for a message until the first
7595 delivery attempt. This could be confusing when incoming messages were held
7596 for policy or load reasons. The message log file is now created at the time
7597 the message is received, and an initial "Received" line is written to it.
7599 4. The automatically generated man page for command line options had a minor
7600 bug that caused no ill effects; however, a more serious problem was that
7601 the procedure for building the man page automatically didn't always
7602 operate. Consequently, release 4.20 contains an out-of-date version. This
7603 shouldn't happen again.
7605 5. When building Exim with embedded Perl support, the script that builds the
7606 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7607 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7609 6. The freeze_tell option was not being used for messages that were frozen on
7610 arrival, either by an ACL or by local_scan().
7612 7. Added the smtp_incomplete_transaction log selector.
7614 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7615 was accepting AUTH without a new EHLO.
7617 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7618 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7621 10. Logging of TCP/IP connections (when configured) now happens in the main
7622 daemon process instead of the child process, so that the TCP/IP connection
7623 count is more accurate (but it can never be perfect).
7625 11. The use of "drop" in a nested ACL was not being handled correctly in the
7626 outer ACL. Now, if condition failure induced by the nested "drop" causes
7627 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7628 or "require"), the connection is dropped.
7630 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7631 that yield "discard" can now be used with an "accept" or a "discard" verb,
7632 but an error is generated for any others (because I can't see a useful way
7633 to define what should happen).
7635 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7636 are now processed in the same way as lines in the Exim configuration file.
7637 In particular, continuation lines are supported.
7639 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7641 15. Added -ti meaning -t -i.
7643 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7644 domains, and warn by logging if others are found.
7646 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7647 returned from GIFCONF when Exim is trying to find the list of interfaces on
7648 a host. The code in os.c has been modified to copy each ifreq to an aligned
7649 structure in all cases.
7651 Also, in some cases, the returned ifreq's were being copied to a 'struct
7652 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7653 means the last couple of bytes of an IPv6 address could be chopped if the
7654 ifreq contained only a normal sockaddr (14 bytes storage).
7656 18. Named domain lists were not supported in the hosts_treat_as_local option.
7657 An entry such as +xxxx was not recognized, and was treated as a literal
7660 19. Ensure that header lines added by a DATA ACL are included in the reject log
7661 if the ACL subsequently rejects the message.
7663 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7664 MD5 (which is deprecated).
7666 21. When testing a filter file using -bf, Exim was writing a message when it
7667 took the sender from a "From " line in the message, but it was not doing so
7668 when it took $return_path from a Return-Path: header line. It now does.
7670 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7671 with a valid header line field name (a series of printing characters
7672 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7674 23. Changed "disc" in the source to "disk" to conform to the documentation and
7675 the book and for uniformity.
7677 24. Ignore Sendmail's -Ooption=value command line item.
7679 25. When execve() failed while trying to run a command in a pipe transport,
7680 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7681 could be confused with a return value of 69 from the command itself. This
7682 has been changed to 127, the value the shell returns if it is asked to run
7683 a non-existent command. The wording for the related log line suggests a
7684 non-existent command as the problem.
7686 26. If received_header_text expands to an empty string, do not add a Received:
7687 header line to the message. (Well, it adds a token one on the spool, but
7688 marks it "old" so that it doesn't get used or transmitted.)
7690 27. Installed eximstats 1.28 (addition of -nt option).
7692 28. There was no check for failure on the call to getsockname() in the daemon
7693 code. This can fail if there is a shortage of resources on the system, with
7694 ENOMEM, for example. A temporary error is now given on failure.
7696 29. Contrary to the C standard, it seems that in some environments, the
7697 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7698 program. Exim now does this explicitly; it affects the formatting of
7699 timestamps using strftime().
7701 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7702 complaints. I've now initialized all the variables, to avoid this.
7704 32. Header lines added by a system filter were not being "seen" during
7705 transport-time rewrites.
7707 33. The info_callback() function passed to OpenSSL is set up with type void
7708 (*)(SSL *, int, int), as described somewhere. However, when calling the
7709 function (actually a macro) that sets it up, the type void(*)() is
7710 expected. I've put in a cast to prevent warnings from picky compilers.
7712 34. If a DNS black list lookup found a CNAME record, but there were no A
7713 records associated with the domain it pointed at, Exim crashed.
7715 35. If a DNS black list lookup returned more than one A record, Exim ignored
7716 all but the first. It now scans all returned addresses if a particular IP
7717 value is being sought. In this situation, the contents of the
7718 $dnslist_value variable are a list of all the addresses, separated by a
7721 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7722 to accept a host name and all its aliases if the forward lookup for any of
7723 them yielded the IP address of the incoming connection. Now it accepts only
7724 those names whose forward lookup yields the correct IP address. Any other
7725 names are discarded. This closes a loophole whereby a rogue DNS
7726 administrator could create reverse DNS records to break through a
7727 wildcarded host restriction in an ACL.
7729 37. If a user filter or a system filter that ran in a subprocess used any of
7730 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7731 the wrong values were passed to the pipe command ($thisaddress had the
7732 value of $0, $0 had the value of $1, etc). This bug was introduced by
7733 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7735 38. Improved the line breaking for long SMTP error messages from ACLs.
7736 Previously, if there was no break point between 40 and 75 characters, Exim
7737 left the rest of the message alone. Two changes have been made: (a) I've
7738 reduced the minimum length to 35 characters; (b) if it can't find a break
7739 point between 35 and 75 characters, it looks ahead and uses the first one
7740 that it finds. This may give the occasional overlong line, but at least the
7741 remaining text gets split now.
7743 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7744 file descriptors might be low, and that setting 1000 would always raise it.
7745 It turns out that in some environments, the limit is already over 1000 and
7746 that lowering it causes trouble. So now Exim takes care not to decrease it.
7748 40. When delivering a message, the value of $return_path is set to $sender_
7749 address at the start of routing (routers may change the value). By an
7750 oversight, this default was not being set up when an address was tested by
7751 -bt or -bv, which affected the outcome if any router or filter referred to
7754 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7755 log only when "message" or "log_message" are set. However, if one of the
7756 conditions was an address verification, or a call to a nested ACL, the
7757 messages generated by the underlying test were being passed through. This
7758 no longer happens. The underlying message is available in $acl_verify_
7759 message for both "message" and "log_message" expansions, so it can be
7760 passed through if needed.
7762 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7763 new expansion $bh_ to give the encoded byte string without charset
7764 translation. Translation happens only if iconv() is available; HAVE_ICONV
7765 indicates this at build time. HEADERS_CHARSET gives the charset to
7766 translate to; headers_charset can change it in the configuration, and
7767 "headers charset" can change it in an individual filter file.
7769 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7770 that creates RFC 2047 encoded "words" labels them as that charset instead
7771 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7772 expansion operator; (ii) when Exim creates a From: line for a local
7773 message; (iii) when a header line is rewritten to include a "phrase" part.
7775 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7776 buggy, causing it to skip the first lines of messages whose message ID
7777 ended in 'D'. This would not have bitten before Exim release 4.14, because
7778 message IDs were unlikely to end in 'D' before then. The effect was to have
7779 incorrect size information for certain domains.
7781 45. #include "config.h" was missing at the start of the crypt16.c module. This
7782 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7785 46. If there was a timeout during a "random" callout check, Exim treated it as
7786 a failure of the random address, and carried on sending RSET and the real
7787 address. If the delay was just some slowness somewhere, the response to the
7788 original RCPT would be taken as a response to RSET and so on, causing
7789 mayhem of various kinds.
7791 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7792 when I implemented it. It didn't allow for the fact that some option values
7793 may legitimately be negative (e.g. size_addition), and it didn't even do
7794 the right test for positive values.
7796 48. Domain names in DNS records are case-independent. Exim always looks them up
7797 in lower case. Some resolvers return domain names in exactly the case they
7798 appear in the zone file, that is, they may contain uppercase letters. Not
7799 all resolvers do this - some return always lower case. Exim was treating a
7800 change of case by a resolver as a change of domain, similar to a widening
7801 of a domain abbreviation. This triggered its re-routing code and so it was
7802 trying to route what was effectively the same domain again. This normally
7803 caused routing to fail (because the router wouldn't handle the domain
7804 twice). Now Exim checks for this case specially, and just changes the
7805 casing of the domain that it ultimately uses when it transmits the message
7808 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7811 50. If a filter generated a file delivery with a non-absolute name (possible if
7812 no home directory exists for the router), the forbid_file option was not
7815 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7816 the existing equality matching.
7818 52. Exim was using ints instead of ino_t variables in some places where it was
7819 dealing with inode numbers.
7821 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7822 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7823 called TMPDIR, and if it finds it is different, it changes its value.
7825 54. The smtp_printf() function is now made available to local_scan() so
7826 additional output lines can be written before returning. There is also an
7827 smtp_fflush() function to enable the detection of a dropped connection.
7828 The variables smtp_input and smtp_batched_input are exported to
7831 55. Changed the default runtime configuration: the message "Unknown user"
7832 has been removed from the ACL, and instead placed on the localuser router,
7833 using the cannot_route_message feature. This means that any verification
7834 failures that generate their own messages won't get overridden. Similarly,
7835 the "Unrouteable address" message that was in the ACL for unverifiable
7836 relay addresses has also been removed.
7838 56. Added hosts_avoid_esmtp to the smtp transport.
7840 57. The exicyclog script was not checking for the esoteric option
7841 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7842 will work only if exicyclog is run under the appropriate euid.
7844 58. Following a discussion on the list, the rules by which Exim recognises line
7845 endings on incoming messages have been changed. The -dropcr and drop_cr
7846 options are now no-ops, retained only for backwards compatibility. The
7847 following line terminators are recognized: LF CRLF CR. However, special
7848 processing applies to CR:
7850 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7851 nor a local message in the state where . is a terminator.
7853 (ii) If a bare CR is encountered in a header line, an extra space is added
7854 after the line terminator so as not to end the header. The reasoning
7855 behind this is that bare CRs in header lines are most likely either
7856 to be mistakes, or people trying to play silly games.
7858 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7859 was being incorrectly given as 18 bytes larger than it should have been.
7860 This is a VOB (very old bug).
7862 60. This may never have affected anything current, but just in case it has:
7863 When the local host is found other than at the start of a list of hosts,
7864 the local host, those with the same MX, and any that follow, are discarded.
7865 When the list in question was part of a longer list of hosts, the following
7866 hosts (not currently being processed) were also being discarded. This no
7867 longer happens. I'm not sure if this situation could ever has previously
7870 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7873 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7874 header. This is something that is recommended in a new Internet Draft, and
7875 is something that is documented as being done by Sendmail. There are two
7876 possible values. For messages generated by the autoreply transport, Exim
7879 Auto-Submitted: auto-replied
7881 whereas for all other generated messages (e.g. bounces) it adds
7883 Auto-Submitted: auto-generated
7885 63. The "personal" condition in filters now includes a test for the
7886 Auto-Submitted: header. If it contains the string "auto-" the message it
7887 not considered personal.
7889 64. Added rcpt_include_affixes as a generic transport option.
7891 65. Added queue_only_override (default true).
7893 66. Added the syslog_duplication option.
7895 67. If what should have been the first header line of a message consisted of
7896 a space followed by a colon, Exim was mis-interpreting it as a header line.
7897 It isn't of course - it is syntactically invalid and should therefore be
7898 treated as the start of the message body. The misbehaviour could have
7899 caused a number of strange effects, including loss of data in subsequent
7900 header lines, and spool format errors.
7902 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7903 client host had authenticated. This control can now be exercised by an ACL
7904 for more flexibility.
7906 69. By default, callouts do not happen when testing with -bh. There is now a
7907 variant, -bhc, which does actually run the callout code, including
7908 consulting and updating the callout cache.
7910 70. Added support for saslauthd authentication, courtesy of Alexander
7913 71. If statvfs() failed on the spool or log directories while checking their
7914 size for availability, Exim confusingly gave the error "space shortage".
7915 Furthermore, in debugging mode it crashed with a floating point exception.
7916 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7917 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7918 serious problem, Exim now writes to the main and panic logs when this
7919 happens, with details of the failure. It then refuses to accept the
7920 incoming message, giving the message "spool directory problem" or "log
7921 directory problem" with a 421 code for SMTP messages.
7923 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7924 0, 1, and 2 exist, because some OS complain for execs without them (see
7925 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7926 descriptors. However, the code omitted to check that the open succeeded,
7927 causing mysterious errors if for some reason the permissions on /dev/null
7928 got screwed. Now Exim writes a message to the main and panic logs, and
7929 bombs out if it can't open /dev/null.
7931 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7932 interact so that it is all more flexible. It is supposed to remain
7933 backwards compatible. Also added extra_local_interfaces.
7935 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7936 to bomb out with an assertion failure - to the client this appears as a
7937 connection drop. This problem occurs in the part of the code that was taken
7938 from the Samba project. Fortunately, the assertion is in a very simple
7939 function, so I have fixed this by reproducing the function inline in the
7940 one place where it is called, and arranging for authentication to fail
7941 instead of killing the process with assert().
7943 75. The SPA client code was not working when the server requested OEM rather
7944 than Unicode encoding.
7946 76. Added code to make require_files with a specific uid setting more usable in
7947 the case where statting the file as root fails - usually a non-root-mounted
7948 NFS file system. When this happens and the failure is EACCES, Exim now
7949 forks a subprocess and does the per-uid checking as the relevant uid.
7951 77. Added process_log_path.
7953 78. If log_file_path was not explicitly set, a setting of check_log_space or
7954 check_log_inodes was ignored.
7956 79. If a space check for the spool or log partitions fails, the incident is now
7957 logged. Of course, in the latter case the data may get lost...
7959 80. Added the %p formatting code to string_format() so that it can be used to
7960 print addresses in debug_print(). Adjusted all the address printing in the
7961 debugging in store.c to use %p rather than %d.
7963 81. There was a concern that a line of code in smtp_in.c could overflow a
7964 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7965 initially expressed, the concern was not well-founded, because trailing
7966 spaces are removed early. However, if the trailing spaces were followed by
7967 a NULL, they did not get removed, so the overflow was possible. Two fixes
7970 (a) I re-wrote the offending code in a cleaner fashion.
7971 (b) If an incoming SMTP command contains a NULL character, it is rejected
7974 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7975 runs initgroups(), so that if the Exim user is in any additional groups,
7976 they will be used during message reception.
7982 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob