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.
8 JH/01 Use fewer forks & execs for sending many messages to a single host.
9 By passing back more info from the transport to the delivery process,
10 we can loop there. A two-phase queue run will benefit, particularly for
11 mailinglist and smarthost cases.
13 JH/02 Add transaction support for hintsdbs. The providers supported are tdb and
14 sqlite. Transactions are used for the wait-transport and retry DBs.
15 They imply locking internal to the DB. We no longer need a separate
16 lockfile, can keep the DB handle open for extended periods, yet
17 potentially benefit from concurrency on non-conflicting record uses.
19 JH/03 With dkim_verify_minimal, avoid calling the DKIM ACL after the first
22 JH/04 Remove the docs and support scripts dealing with conversion of Exim
23 version 3 installations.
25 JH/05 Fix hintsdb support for dbmjz when compiled using sqlite3. Previously
26 the backend support assumed keys would be simple C strings, but dbmjz
27 uses keys with embedded NUL bytes. The builtin hintsdb use is unaffected,
28 but installations using dbmjz will need to rebuild those DBs.
30 JH/06 Bug 1141: When operating a continued-connection transport, verify that
31 the interface option, if specified, evaluates to match the connection.
32 Previously, a queued message for the same host was sent without checking.
37 JH/01 Support list of dkim results in the dkim_status ACL condition, making
38 it more usable in the data ACL.
40 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
41 Previously This was only logged, on the assumption that errors would be
42 seen for a previous fflush(). However, a fuse filesystem has been
43 reported as showing this an error for the fclose(). The spool is now in
44 an uncertain state, and we have logged and responded acceptance. Change
45 this to respond with a temp-reject, wipe spoolfiles, and log the error
48 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
49 during a recipient verify callout, a QUIT command was attempted on the
50 now-closed callout channel, causing a paniclog entry.
52 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
53 a connection_reject log_selector, under tls_on_connect. Previously
54 with this combination, when the connect ACL rejected, a spurious
55 paniclog entry was made.
57 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
58 of loadbalancer-detection for resumption, in 4.96 - which tries to
59 use the EHLO response. SMTPS does not have one at the time it is starting
60 TLS. Change the default for the smtp transport host_name_extract option
61 to be a static string, for TLS-on-connect cases; meaning that resumption
62 will always be attempted (unless deliberately overriden).
64 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
65 chunk-separator specification. This was broken by hardening introduced
68 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
69 included the -H with the id; this also messed up exiqgrep.
71 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
72 was not properly skipped and empty elements would cause mis-parsing.
73 Tighten parsing of DKIM header records. Previously, all but lowercase
74 alpha chars would be ignored in potential tag names.
76 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
77 being searched. Previously we only had one for IPv4 addresses. Per the
78 documentation, the error results by default in a no-match result for the
79 list. It is logged if the unknown_in_list log_selector is used.
81 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
82 the routing operation. Previously it would silently stop routing the
85 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
86 info-request event close in time to a scheduled run timer could result in
87 the latter being missed, and no further queue scheduled runs being
88 initiated. This ouwld be more likely on high-load systems.
90 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
91 LF-only mode (as detected from the first header line). Previously we did
92 accept that in (normal) CRLF mode; this has been raised as a possible
93 attack scenario (under the name "smtp smuggling").
95 JH/13 Add an fdatasync call for the received message data file in spool, before
96 loggging reception and sending the SMTP ack. Previously we only flushed
97 the stdio buffer so there was still the possibility of a disk error.
99 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
100 address. Previously, for the last address in a header line (commonly
101 there is only one) the terminating newline was part of the logged
104 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
105 header, when parsing for address-qualification. Previously one was only
106 written if there were rewrite rules.
108 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
111 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
112 the multiple-queue-runners facility for 4.97 broke this, giving only a
113 one-time run of the queue.
115 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
118 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
119 TLS session resulted in a forced-fail, a misleading error was logged for
120 the expansino of tls_certificates. This would affect the common case of
121 that option being set (main-section options) but not having any variable
122 parts. It could also potentially affect tls_privatekeys. The underlyding
123 coding errors go back to 4.90 but were only exposed in 4.97.
125 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
126 pcre2 library starting allocating 20kB rather than 112 bytes per match
127 call, which broke the 2GB total limitation on Exim's memory management
128 when a user had over 104207 messages stored and the appendfile
129 maildir_quota_directory_regex option is in use. Release the allocated
130 memory every thosand files to avoid this.
131 The same issue arises with the ACL regex condition, which is applied
132 to every line of a received message.
134 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
135 which all recipients had been handled (itself an issue) a null-pointer
136 deref was done on trying to write a retry record. Fix that by counting
137 the outstanding recipients before trying to transmit the message.
138 The situation arose for a second MX try within a transport run, when the
139 first had perm-rejected a recipient (the only one for the connection, in
140 the case seen) during pipelining, and then closed the TCP connection.
141 The transport classified that as an I/O error, leaving the message
142 outstanding but having marked up the recipient as dealt-with. It then
143 tried another MX because of the I/O error. Fix this by converting the
144 message-level status to ok if there was a close but all recipients were
145 dealt with. Thanks to Wolfgand Breyha for debug runs.
147 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
148 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
150 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
152 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
153 option specified a fixed address, later rewriting on that address would
154 trip on the configuration data being readonly. Instead of modifying
155 in-place, copy data. Found and fixed by Peter Benie.
157 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
158 data a null pointer was followed. Find and testcase by Sebastian Bugge.
160 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
161 decimal 127 chars were not encoded, and lowercase hex was used for
162 encoded values. Outstanding since at least 1999.
164 JH/27 Fix crash in logging. When a message with a large number of recipients
165 had been received, and logging of recipients is enabled, the buffer used
166 for logging could reach limit. A read using a null pointer would then
167 be done, resulting in a crash of the receiving process before an SMTP
168 ACK for the message was returned to the sending system. Duplicate
169 messages were created as a result.
170 Find and debug help by Mateusz Krawczyk
172 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
173 DB, wrapping transport record bare-ip "host names" and ipv6
174 "host addresses" in square-brackets. This makes the parsing that
175 exinext does more reliable.
177 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
180 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
182 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
183 ipv6 addresses for the sender. Previously the uncompressed form was used,
184 and if used in textual form this would result in behavior difference
187 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
188 now classed as a protocol error and subject to smtp_max_synprot_errors.
190 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
191 ".." and has following characters.
193 JH/34 Fix delivery ordering for 2-phase queue run combined with
196 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
197 Previously the $mime_filename variable would have an incorrect value.
198 While in the code, extend coverage to name= which previously was only
199 supported for single parameters, despite also filling in $mime_filename.
205 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
206 SMTP connection" log lines.
208 JH/02 Option default value updates:
209 - queue_fast_ramp (main) true (was false)
210 - remote_max_parallel (main) 4 (was 2)
212 JH/03 Cache static regex pattern compilations, for use by ACLs.
214 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
215 Make the rewrite never match and keep the logging. Trust the
216 admin to be using verify=header-syntax (to actually reject the message).
218 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
219 (under Linux) we watch the dir containing the final file; previously
220 it would be the dir with the first symlink. We still do not monitor
223 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
224 dn_expand() is happy to pass them through.
226 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
227 the file with the proof had an unchanged name, the new proof(s) were
228 loaded on top of the old ones (and nover used; the old ones were stapled).
230 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
231 more than one message arrived in a single connection a reference from
232 the earlier message could be re-used. Often a sigsegv resulted.
233 These variables were introduced in Exim 4.87.
234 Debug help from Graeme Fowler.
236 JH/09 Fix ${filter } for conditions that modify $value. Previously the
237 modified version would be used in construction the result, and a memory
240 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
241 Find and fix by Jasen Betts.
243 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
244 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
245 the systemwide configuration to override the Exim config.
247 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
248 API changes in libopendmarc.
250 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
251 pid 1, in the normal "background daemon" mode, having to drop process-
252 group leadership also lost track of needing to create listener sockets.
254 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
255 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
257 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
258 a capture group which obtained no text (eg. "(abc)*" matching zero
259 occurrences) could cause a segfault if the corresponding $<n> was
262 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
263 included a close-brace character (eg. it itself used an expansion) an
266 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
267 starting TLS. Previously it was after, meaning that attackers on such
268 ports had to be screened using the host_reject_connection main config
269 option. The new sequence aligns better with the STARTTLS behaviour, and
270 permits defences against crypto-processing load attacks, even though it
271 is strictly an incompatible change.
272 Also, avoid sending any SMTP fail response for either the connect ACL
273 or host_reject_connection, for TLS-on-connect ports.
275 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
276 Previously this was not permitted, but it makes reasonable sense.
277 While there, restore a restriction on using it from a connect ACL; given
278 the change JH/16 it could only return false (and before 4.91 was not
281 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
282 was exactly sized compared to the log buffer, a crash occurred with the
283 misleading message "bad memory reference; pool not found".
284 Found and traced by Jasen Betts.
286 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
287 dns_again_means_nonexist included an element causing a DNS lookup which
288 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
289 included (though probably not limited to) a process crash from stack
290 memory limit, or from excessive open files. Replace this with a paniclog
291 whine (as this is likely a configuration error), and returning
294 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
295 this always failed, probably leading to the usual downgrade to in-clear
298 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
299 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
300 to not checking that list for these lookups.
302 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
305 JH/23 Fix crash in string expansions. Previously, if an empty variable was
306 immediately followed by an expansion operator, a null-indirection read
307 was done, killing the process.
309 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
310 include an SMTP response string which is longer than that supported
311 by the delivering transport. Alleviate by wrapping such lines before
314 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
315 chars (RFC limit). Previously a limit of 12 items was made, which with
316 a not-impossible References: in the message being bounced could still
317 be over-large and get stopped in the transport.
319 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
320 close. Previously a bare socket close was done.
322 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
325 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
326 message being considered for delivery was already being handled by
327 another process, and having an SMTP connection already open, the function
328 to close it tried to use an uninitialized variable. This would afftect
329 high-volume sites more, especially when running mailing-list-style loads.
330 Pollution of logs was the major effect, as the other process delivered
331 the message. Found and partly investigated by Graeme Fowler.
333 JH/29 Change format of the internal ID used for message identification. The old
334 version only supported 31 bits for a PID element; the new 64 (on systems
335 which can use Base-62 encoding, which is all currently supported ones
336 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
337 and must use Base-36). The new ID is 23 characters rather than 16, and is
338 visible in various places - notably logs, message headers, and spool file
339 names. Various of the ancillary utilities also have to know the format.
340 As well as the expanded PID portion, the sub-second part of the time
341 recorded in the ID is expanded to support finer precision. Theoretically
342 this permits a receive rate from a single comms channel of better than the
344 The major timestamp part of the ID is not changed; at 6 characters it is
345 usable until about year 3700.
346 Updating from previously releases is fully supported: old-format spool
347 files are still usable, and the utilities support both formats. New
348 message will use the new format. The one hints-DB file type which uses
349 message-IDs (the transport wait- DB) will be discarded if an old-format ID
350 is seen; new ones will be built with only new-format IDs.
351 Optionally, a utility can be used to convert spool files from old to new,
352 but this is only an efficiency measure not a requirement for operation
353 Downgrading from new to old requires running a provided utility, having
354 first stopped all operations. This will convert any spool files from new
355 back to old (losing time-precision and PID information) and remove any
356 wait- hints databases.
358 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
359 we treated them as item separators when parsing for a list item, but they
360 need to be protected by the doublequotes. While there, add handling for
363 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
364 Found and fixed by Jasen Betts. No testcase for this as my usual text
365 editor insists on emitting only valid UTF-8.
367 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
368 a null-indirection SIGSEGV for the receive process.
370 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
371 -bh use. Internal checking would spot this and take a panic.
373 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
374 In 4.96 this would expand to empty.
376 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
377 certificate. Find and fix by Andreas Metzler.
379 JH/36 Add ARC info to DMARC hostory records.
381 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
382 or fakedefer. Previously the sender could discover that the message
383 had in fact been accepted.
385 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
386 sequences. Previously the input was not noted as being tainted; notably
387 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
388 bad coding of authenticators.
390 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
391 and ${tr...}. Found and diagnosed by Heiko Schlichting.
393 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
394 could be triggered by externally-supplied input. Found by Trend Micro.
397 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
398 be triggered by externally-controlled input. Found by Trend Micro.
401 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
402 be triggered by externally-controlled input. Found by Trend Micro.
405 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
406 Make the rewrite never match and keep the logging. Trust the
407 admin to be using verify=header-syntax (to actually reject the message).
409 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
412 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
418 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
419 after reception to before a subsequent reception. This should
420 mean slightly faster delivery, and also confirmation of reception
423 JH/02 Move from using the pcre library to pcre2. The former is no longer
424 being developed or supported (by the original developer).
426 JH/03 Constification work in the filters module required a major version
427 bump for the local-scan API. Specifically, the "headers_charset"
428 global which is visible via the API is now const and may therefore
429 not be modified by local-scan code.
431 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
432 sendfile() didi not account for the way the ClamAV driver code called it.
434 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
435 time check was being done for every character; replace that with one
438 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
439 sent was prefixed with a length byte.
441 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
442 RFC 5321. Previously Dovecot (at least) would log errors during
445 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
446 in 4.61 without a reason logged. Binaries will be bigger, which might
447 matter on diskspace-constrained systems, but debug is easier.
449 JH/09 Fix macro-definition during "-be" expansion testing. The move to
450 write-protected store for macros had not accounted for these runtime
451 additions; fix by removing this protection for "-be" mode.
453 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
454 handing out large-numbered file descriptors, violating the usual Unix
455 assumption (and required by Posix) that the lowest possible number will be
456 allocated by the kernel when a new one is needed. In the daemon, and any
457 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
458 are not useable for FD_SET() [and hence select()] and overwrite the stack.
459 Assorted crashes happen.
461 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
462 main-section options or in a connect ACL, the value from the first ever
463 connection was never replaced for subsequent connections. Found by
466 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
467 though only once PCRE2 was introduced: the memory accounting used under
468 debug offset allocations by an int, giving a hard trap in early startup.
469 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
471 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
472 with underbars is given. The write-protection of configuration introduced
473 in 4.95 trapped when normalisation was applied to an option not needing
476 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
478 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
479 failing to close the certificates directory, every hour or any time it
482 JH/16 Debugging initiated by an ACL control now continues through into routing
483 and transport processes. Previously debugging stopped any time Exim
484 re-execs, or for processing a queued message.
486 JH/17 The "expand" debug selector now gives more detail, specifically on the
487 result of expansion operators and items.
489 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
490 bad comparison between the option value and the name of the file to
491 be included was done, and a mismatch was wrongly identified.
492 4.88 to 4.95 are affected.
494 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
496 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
497 supplied as the db file-pair basename. Previously, if a directory
498 path was given, for example via the autoreply "once" option, the DB
499 file.pag and file.dir files would be created in that directory's
502 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
503 "taint" log_selector. These were previously deprecated.
505 JH/22 Fix static address-list lookups to properly return the matched item.
506 Previously only the domain part was returned.
508 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
509 the call into OpenSSL to send a TLS Close was being repeated; this
510 resulted in the library waiting for the peer's Close. If that was never
511 sent we waited forever. Fix by tracking send calls.
513 JH/24 The ${run} expansion item now expands its command string elements after
514 splitting. Previously it was before; the new ordering makes handling
515 zero-length arguments simpler. The old ordering can be obtained by
516 appending a new option "preexpand", after a comma, to the "run".
518 JH/25 Taint-check exec arguments for transport-initiated external processes.
519 Previously, tainted values could be used. This affects "pipe", "lmtp" and
520 "queryprogram" transport, transport-filter, and ETRN commands.
521 The ${run} expansion is also affected: in "preexpand" mode no part of
522 the command line may be tainted, in default mode the executable name
525 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
526 the the facility was not passed across execs, and only the first message
527 passed over a connection could use BDAT; any further ones using DATA.
529 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
530 uses $sending_ip_address and an interface is specified.
531 Previously any use of the local address in the EHLO name disabled
532 PIPECONNECT, the common case being to use the rDNS of it.
534 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
535 resumption. Previously verify failed because no certificate status is
536 passed on the wire for the restarted session. Fix by using the recorded
537 ocsp status of the stored session for the new connection.
539 JH/29 TLS resumption: the key for session lookup in the client now includes
540 more info that a server could potentially use in configuring a TLS
541 session, avoiding oferring mismatching sessions to such a server.
542 Previously only the server IP was used.
544 JH/30 Fix string_copyn() for limit greater than actual string length.
545 Previously the copied amount was the limit, which could result in a
546 overlapping memcpy for newly allocated destination soon after a
547 source string shorter than the limit. Found/investigated by KM.
549 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
550 close; it may be needed for a subsequent connection. This caused a
551 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
553 JH/32 Fix CHUNKING for a second message on a connection when the first was
554 rejected. Previously we did not reset the chunking-offered state, and
555 erroneously rejected the BDAT command. Investigation help from
558 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
559 an empty address. Previously the expansion returned an error.
561 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
562 proxy. Previously these were misparsed, leading to paniclog entries.
568 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
569 related applications. Previously an "H" was used where available info
570 says that "M" should be, so change to match.
572 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
573 as arguments, so an implementation trying to copy these into a local
574 buffer was taking a taint-enforcement trap. Fix by using dynamically
575 created buffers. Similar fix for radius expansion condition.
577 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
578 reasonable, eg. to count headers. Fix by using dynamically created
579 buffers rather than a local. Do similar fixes for ACL actions "dcc",
580 "log_reject_target", "malware" and "spam"; the arguments are expanded
581 so could be handling tainted values.
583 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
584 broken the (no-op) support for this sendmail command. Restore it
585 to doing nothing, silently, and returning good status.
587 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
588 record path was given (or the default used) without a leading directory
589 path, an error occurred on trying to open it. Use the transport's working
592 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
593 transport. Previously it was the name on the DNS A-record; use instead
594 the head of the CNAME chain leading there (if there is one). This seems
595 to align better with RFC 6125.
597 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
598 smtp_accept_max_per_host allocated resources which were not released
599 when the limit was exceeded. This eventually crashed the daemon. Fix
600 by adding a release action in that path.
602 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
603 expanded; previously using tainted values was rejected. Fix by using
604 dynamically-created buffers.
606 JH/09 Relax restrictions on ACL verify condition needing access to message
607 headers. Previously they were only permitted in data and non-smtp ACLs;
608 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
609 not_blind, header_sender and header_names_ascii verification.
611 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
612 Previously a macro used one argument twice; when called with the
613 argument as an expression having side-effects, incorrect operation
614 resulted. Use an inlineable function.
616 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
617 held open for a verify callout. Previously this wan not accounted for
618 and a corrupt onward SMTP conversation resulted.
620 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
621 Previously they were embedded naively in the constructed address; when
622 needed, strip the quoting and quote the entire local_part.
623 Also make the inbound_srs expansion condition handle quoting.
625 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
626 excluded, not matching the documentation.
628 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
629 was given for the sqlite_dbfile a trap resulted.
631 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
632 "name" argument resulted in a trap. There is no reason to disallow such;
633 this was a coding error.
635 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
636 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
637 spent suspended, ignoring the POSIX definition. Previously we assumed
638 it did and a constant offset from real time could be used as a correction.
639 Change to using the same clock source for the start-of-message and the
640 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
641 exists, just to get a clock slightly more aligned to reality.
643 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
644 RFC says it is optional some validators care. The missing char was not
645 intended but triggered by a line-wrap alignment. Discovery and fix by
646 Guillaume Outters, hacked on by JH.
648 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
649 name being quoted was tainted a trap would be taken. Fix by using
650 dynamically created buffers. The routine could have been called by a
651 rewrite with the "h" flag, by using the "-F" command-line option, or
652 by using a "name=" option on a control=submission ACL modifier.
654 JH/19 SPF: change the Authentication-Results expansion component to give
655 smtp.helo when the sender domain is empty. Previously it gave
658 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
659 not in 127.0.0.0/8 to help in spotting list domains taken over by a
660 domain-parking registrar.
662 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
663 Previously when a whitespace character was specified it was not inserted
664 after removing the newline.
666 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
667 the domain part of the recipient address. This overrides any tls_sni
668 option set, which was previously used.
670 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
673 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
674 is_tainted() had an off-by-one error in the overenthusiastic direction.
675 Find and fix by Gavan. Although NetBSD is not a supported platform for
676 4.94 this bug could affect other platforms.
678 PP/01 Fix default prime selection to be consistent.
679 One path used ike23 still, instead of exim.dev.20160529.3; now both
680 execution flows will use the same DH primes (currently
681 exim.dev.20160529.3).
683 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
684 option in smtp transport, to match the documentation. Previously
685 verification was not being done in some cases where it should have been.
687 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
688 than one server was defined and depending on the platform memory layout
689 details, an internal consistency trap could be hit while walking the list
692 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
693 files. The value is used by the authresults expansion item. Previously
694 if this was used in a router or transport, a crash could result.
696 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
697 have a sufficient incidence of EINTR returns from select that an
698 interaction with other operations done by the main daemon loop exposed
699 a bug in the error-handling. This was benign apart from the log
702 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
703 for consistency with delivered "=>" and failed "**" lines. While we're
704 there, handle PRX and TFO.
706 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
707 applied. This resulted, if any header-line rewrite rules were configured,
708 in a panic-log triggerable by sending a message with a long address in
709 a header. Fix by increasing the arbitrary limit to larger than a single
710 (dewrapped) 5322 header line maximum size.
712 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
713 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
714 RFC 6648 which deprecates X- options in protocols as a general practice.
715 Changeover between the implementations is handled by the mechanisms
718 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
719 a remote which uses callout/hold. Previously the local was queued.
721 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
724 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
725 log line. The asterisk is now consistently appended to the remote IP
726 (and port, if given), and will also be provided on defer and fail log
727 lines. Previously it could be placed on the local IP if that was being
728 logged, and was only provided on delivery lines.
730 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
732 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
733 authenticator client_send option. Previously the next char, after a pair
734 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
735 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
736 documentation. There is still no way to get a leading ^ immediately
737 after a NUL (ie. for the password of a PLAIN method authenticator.
739 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
740 files. For bad sizes read, delete the record and whine to paniclog.
742 JH/38 When logging an AUTH failure, as server, do not include sensitive
743 information. Previously, the credentials would be included if given
744 as part of the AUTH command line and an ACL denied authentication.
746 JH/39 Bug 2691: fix $local_part_data. When the matching list element
747 referred to a file, bad data was returned. This likely also affected
750 JH/40 The gsasl authenticator now supports caching of the salted password
751 generated by the client-side implementation. This required the addition
752 of a new variable: $auth4.
754 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
755 left undeleted; the attempt to re-create it then failed - resulting in
756 the usual "SIGHUP tp have daemon reload configuration" to not work.
757 This affected any platform not supporting "abstract" Unix-domain
758 sockets (i.e. not Linux).
760 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
761 recipients" response to RCPT in a later response, with a 250. The
762 previous coding assumed this would not happen, and under PIPELINING
763 would result in both lost and duplicate recipients for a message.
765 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
766 Previously the weighting was incorrectly applied. Similar fix for socks
767 proxies. Found and fixed by Heiko Schlichting.
769 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
770 not handle sub-lists included using the +namedlist syntax. While
771 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
772 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
775 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
776 Previously the permanent pool was used, so the store could not be freed.
777 This meant a connection with many messages would use continually-growing
780 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
781 per-pool so as not to waste too much space. Previously a constant size
782 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
783 DOS attacks harder. The cost is wasted memory use in the larger blocks.
785 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
786 same space repeatedly, and a smaller process footprint.
788 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
789 for GnuTLS. Previously the name started "%s" which, while not a bug,
790 looked as if if might be one.
792 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
793 "continued connection") make the $proxy_* variables available. Previously
794 the information was not passed across the exec() call for subsequent
795 transport executions. This also mean that the log lines for the
796 messages can show the proxy information.
798 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
799 receive time. With modern systems the difference is significant.
800 The historical behaviour can be restored by disabling (a new) log_selector
801 "queue_time_exclusive".
803 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
804 content) were specifically tested for. Now, also cover expansions
805 resulting in ACL names and inline ACL content.
807 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
808 making it unusable in complex expressions.
810 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
811 fail with a taint-check on the spoolfile name, and leave the message
814 HS/01 Enforce absolute PID file path name.
816 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
818 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
820 PP/02 Bug 2643: Correct TLS DH constants.
821 A missing NUL termination in our code-generation tool had led to some
822 incorrect Diffie-Hellman constants in the Exim source.
823 Reported by kylon94, code-gen tool fix by Simon Arlott.
825 PP/03 Impose security length checks on various command-line options.
826 Fixes CVE-2020-SPRSS reported by Qualys.
828 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
829 better. Reported by Qualys.
831 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
832 providing a particularly obnoxious sender full name.
835 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
837 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
840 PP/08 Change default for recipients_max from unlimited to 50,000.
842 PP/09 Fix security issue with too many recipients on a message (to remove a
843 known security problem if someone does set recipients_max to unlimited,
844 or if local additions add to the recipient list).
845 Fixes CVE-2020-RCPTL reported by Qualys.
847 PP/10 Fix security issue in SMTP verb option parsing
848 Fixes CVE-2020-EXOPT reported by Qualys.
850 PP/11 Fix security issue in BDAT state confusion.
851 Ensure we reset known-good where we know we need to not be reading BDAT
852 data, as a general case fix, and move the places where we switch to BDAT
853 mode until after various protocol state checks.
854 Fixes CVE-2020-BDATA reported by Qualys.
856 HS/03 Die on "/../" in msglog file names
858 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
859 the Exim runtime user are allowed to create files.
861 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
864 QS/03 When reading the output from interpreted forward files we do not
865 pass the pipe between the parent and the interpreting process to
866 executed child processes (if any).
868 QS/04 Always die if requested from internal logging, even is logging is
871 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
872 the API; compilation noo longer completes with DMARC support included.
873 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
874 been reported on other platforms.
876 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
878 JH/56 Make the majority of info read from config files readonly, for defence-in-
879 depth against exploits. Suggestion by Qualys.
880 Not supported on Solaris 10.
882 JH/57 Fix control=fakreject for a custom message containing tainted data.
883 Previously this resulted in a log complaint, due to a re-expansion present
884 since fakereject was originally introduced.
886 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
887 modifier was given, a loop resulted.
889 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
890 pipelined SMTP command followed the BDAT LAST then it would be
891 incorrectly treated as part of the message body, causing a verification
894 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
895 require looser validation rules than those for 821-level addresses,
896 which only permit IP addresses.
902 JH/01 Avoid costly startup code when not strictly needed. This reduces time
903 for some exim process initialisations. It does mean that the logging
904 of TLS configuration problems is only done for the daemon startup.
906 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
908 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
909 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
912 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
913 DKIM signing is being done. Previously a transport_filter would always
914 disable CHUNKING, falling back to traditional DATA.
916 JH/05 Regard command-line recipients as tainted.
918 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
920 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
921 PAM library frees one of the arguments given to it, despite the
922 documentation. Therefore a plain malloc must be used.
924 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
925 on-stack buffers were used, resulting in a taint trap when DSN information
926 copied from a received message was written into the buffer.
928 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
929 the ordering of its ARC headers. This caused a crash.
931 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
932 a new record was being constructed with information from the peer, a trap
935 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
936 installation would get error messages from DMARC verify, when it hit the
937 nonexistent file indicated by the default. Distros wanting DMARC enabled
938 should both provide the file and set the option.
939 Also enforce no DMARC verification for command-line sourced messages.
941 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
942 could, depending on the platform, hang at the STARTTLS response.
944 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
945 message on a connection. Previously if one message had ARC headers and
946 the following one did not, a crash could result when adding an
947 Authentication-Results: header.
949 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
950 Exim main code and Exim-related utities. The introduction of taint
951 tracking also did many adjustments to string handling. Since then, eximon
952 frequently terminated with an assert failure.
954 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
955 check for 452 responses. This slightly helps the inefficieny of doing
956 a large alias-expansion into a recipient-limited target. The max_rcpt
957 transport option still applies (and at the current default, will override
958 the new feature). The check is done for either cause of synch, and forces
959 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
960 connection. The new facility is not tunable at this time.
962 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
963 library live data was being used, so the results became garbage. Make
964 copies while it is still usable.
966 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
967 on delivery deferred (==) and failed (**) lines (if a delivery was
968 attemtped). Previously it was only on completion (=>) lines.
970 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
971 for the expansion of the server_scram_iter and server_scram_salt options.
973 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
974 are now specifically given a NO_DATA response without hitting the system
975 resolver. The library goes on to do the now-standard TXT lookup.
976 Use of dnsdb lookups is not affected.
978 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
979 only retrieve the errormessage once. Previously two calls to dlerror()
980 were used, and the second one (for mainlog/paniclog) retrieved null
983 JH/20 Taint checking: disallow use of tainted data for
984 - the appendfile transport file and directory options
985 - the pipe transport command
986 - the autoreply transport file, log and once options
987 - file names used by the redirect router (including filter files)
989 - paths used by single-key lookups
990 Previously this was permitted.
992 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
993 adjusted the size of a major service buffer; this failed because the
994 buffer was in use at the time. Change to a compile-time increase in the
995 buffer size, when this authenticator is compiled into exim.
997 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
998 previous fast-mode was untenable in the face of glibs using mmap to
999 support larger malloc requests.
1001 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
1002 New values supported, if defined on system where compiled:
1003 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
1004 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
1006 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
1007 running a limited number of proceses in parallel, a benefit is gained. The
1008 amount varies with the platform hardware and load. The use of the option
1009 queue_run_in_order means we cannot do this, as ordering becomes
1012 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1013 had introduced a string-copy (for ensuring NUL-termination) which was not
1014 appropriate for that case, which can include embedded NUL bytes in the
1015 block of data. Investigation showed the copy to actually be needless, the
1016 data being length-specified.
1018 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1019 done during a receiving connection, and both used TLS, global info was
1020 used rather than per-connection info for tracking the state of data
1021 queued for transmission. This could result in a connection hang.
1023 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1024 Previously, when delivering serveral messages down a single connection
1025 only the first would provide a SIZE. This was due to the size information
1026 not being properly tracked.
1028 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1029 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1030 expansion and logging. Previously, spurious values such as a future
1031 minute could be seen.
1033 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1034 it could crash from a null-deref. This could also affect the
1035 ${addresses: } operator and ${readsock } item.
1037 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1038 message following a mime one, the variable was not reset.
1040 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1041 cached capability (perhaps the peer reneged?) and immediately retry in
1044 JH/31 Fix spurious detection of timeout while writing to transport filter.
1046 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1047 an attempt to copy the string was made before checking it.
1049 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1050 taint of the lookup key was maintained; we now regard the presence in the
1051 filesystem as sufficient validation.
1053 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1054 argument is supplied.
1056 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1057 Previously this was not checked, and nonempty relative paths made an
1058 access under Exim's current working directory.
1060 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1061 Previously no event was raised.
1063 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1064 parameter supplied by the sender MAIL FROM command. Previously it was
1065 ignored, and only the check_spool_space option value for the required
1068 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1069 the size of the signing public-key. Previously it was instead giving
1070 the size of the signature hash.
1072 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1073 the default. See the (new) dkim_verify_min_keysizes option.
1075 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1076 and an ACL use a lookup for checking either the local_part or domain,
1077 stale data could be accessed. Ensure that variable references are
1078 dropped between messages.
1080 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1081 by the client was not checked as pointing within response data before
1082 being used. A malicious client could thus cause an out-of-bounds read and
1083 possibly gain authentication. Fix by adding the check.
1085 JH/42 Internationalisation: change the default for downconversion in the smtp
1086 transport to be "if needed". Previously it was "as previously set" for
1087 the message, which usually meant "if needed" for message-submission but
1088 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1089 even when the envelope addresses did not need it, resulting in forwarding
1090 failures to non-supporting MTAs. A downconvert in such cases will be
1091 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1092 transport. The change does mean that addresses needing conversion will
1093 be converted when previously a delivery failure would occur.
1095 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1096 response was received it would be used unchecked in a fail-DSN, violating
1097 standards on line-length limits. Truncate if needed.
1099 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1100 doesn't work. (Additionally add a new main config option to configure the
1107 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1108 side, to decode a TLS 1.3 packet capture.
1110 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1111 Previously the default library behaviour applied, sending two, each in
1112 its own TCP segment.
1114 JH/03 Debug output for ACL now gives the config file name and line number for
1117 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1119 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1121 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1122 buffer overrun for (non-chunking) other transports.
1124 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1125 TLS1.3, means that a server rejecting a client certificate is not visible
1126 to the client until the first read of encrypted data (typically the
1127 response to EHLO). Add detection for that case and treat it as a failed
1128 TLS connection attempt, so that the normal retry-in-clear can work (if
1129 suitably configured).
1131 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1132 and/or domain. Found and fixed by Jason Betts.
1134 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1135 configuration). If a CNAME target was not a wellformed name pattern, a
1138 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1139 the OS reports them interleaved with other addresses.
1141 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1142 used both for input and for a verify callout, both encrypted, SMTP
1143 responses being sent by the server could be lost. This resulted in
1144 dropped connections and sometimes bounces generated by a peer sending
1147 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1148 string. Previously it was possible to cause undefined behaviour in a
1149 library routine (usually a crash). Found by "zerons".
1151 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1154 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1155 API was removed, so update to use the newer ones.
1157 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1158 any timeout set, is taking a long time. Previously we would hang on to a
1159 rotated logfile "forever" if the input was arriving with long gaps
1160 (a previous attempt to fix addressed lack, for a long time, of initial
1163 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1164 shared (NFS) environment. The length of the tempfile name is now
1165 4 + 16 ("hdr.$message_exim_id") which might break on file
1166 systems which restrict the file name length to lower values.
1167 (It was "hdr.$pid".)
1169 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1170 shared (NFS) environment.
1172 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1173 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1176 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1177 on some platforms for bit 31.
1179 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1180 to changes apparently associated with TLS1.3 handling some of the APIs
1181 previously used were either nonfunctional or inappropriate. Strings
1182 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1183 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1184 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1185 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1186 and the use of specific cipher names in the encrypted= ACL condition.
1188 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1190 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1191 verification result was not updated unless hosts_require_ocsp applied.
1193 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1194 queue_list_requires_admin set to false, non-admin users were denied the
1197 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1198 directory-of-certs mode. Previously they were advertised despite the
1201 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1202 A single TCP connection by a client will now hold a TLS connection open
1203 for multiple message deliveries, by default. Previously the default was to
1206 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1207 default. If built with the facility, DANE will be used. The facility
1208 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1210 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1211 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1212 must be defined and you must still, unless you define DISABLE_TLS, manage
1213 the the include-dir and library-file requirements that go with that
1214 choice. Non-TLS builds are still supported.
1216 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1219 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1220 default. If the platform supports and has the facility enabled, it will
1221 be requested on all coneections.
1223 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1224 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1226 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1228 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1229 success-DSN messages. Previously the From: header was always the default
1230 one for these; the option was ignored.
1232 JH/28 Fix the timeout on smtp response to apply to the whole response.
1233 Previously it was reset for every read, so a teergrubing peer sending
1234 single bytes within the time limit could extend the connection for a
1235 long time. Credit to Qualsys Security Advisory Team for the discovery.
1237 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1238 delivery address, which leaked information of the results of local
1239 forwarding. Change to the original envelope recipient address, per
1242 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1243 requested. Previously not bounce was generated and a log entry of
1244 error ignored was made.
1246 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1248 JH/32 Introduce a general tainting mechanism for values read from the input
1249 channel, and values derived from them. Refuse to expand any tainted
1250 values, to catch one form of exploit.
1252 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1253 was unused and the unexpanded text used for the test. Found and
1254 fixed by Ruben Jenster.
1256 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1257 an attempt to use a TLS library read routine dereffed a nul pointer,
1260 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1261 them in our smtp response.
1263 JH/36 Have the general router option retry_use_local_part default to true when
1264 any of the restrictive preconditions are set (to anything). Previously it
1265 was only for check_local user. The change removes one item of manual
1266 configuration which is required for proper retries when a remote router
1267 handles a subset of addresses for a domain.
1269 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1270 link count into consideration.
1272 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1273 caused the extension of big_buffer, the following lines were ignored.
1275 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1276 accordance with RFC 2308. Previously there was no expiry, so a longlived
1277 receive process (eg. due to ACL delays) versus a short SOA value could
1280 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1282 JH/39 Promote DMARC support to mainline.
1284 JH/40 Bug 2452: Add a References: header to DSNs.
1286 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1287 parameters. The relevant library call is documented as "Deprecated: This
1288 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1289 3.6.0, DH parameters are negotiated following RFC7919."
1291 HS/06 Change the default of dnssec_request_domains to "*"
1293 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1294 carried on and emitted a BDAT command, even when PIPELINING was not
1297 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1298 buffer was used for the filename, resulting in a trap when tainted
1299 arguments (eg. $domain) were used.
1301 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1302 recommended to avoid a possible server-load attack. The feature can be
1303 re-enabled via the openssl_options main cofiguration option.
1305 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1306 for version 4.90 - adding a "more data" boolean to the arguments.
1307 Bumped the ABI version number also, this having been missed previously;
1308 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1309 respect of usage of smtp_printf() by either local_scan code or libraries
1310 accessed via the ${dlfunc } expansion item. Both will need coding
1311 adjustment for any calls to smtp_printf() to match the new function
1312 signature; a FALSE value for the new argument is always safe.
1314 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1315 the file-offset (which the Linux syscall does, and exim expects); this
1316 resulted in an indefinite loop.
1318 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1319 to do ARC verification. The Authentication-Results: header line added
1320 by the configuration then had no ARC item.
1322 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1323 an incorrect mode was used for reading the result, resulting in it being
1330 JH/01 Remove code calling the customisable local_scan function, unless a new
1331 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1333 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1334 non-signal-safe functions being used.
1336 JH/03 Bug 2269: When presented with a received message having a stupidly large
1337 number of DKIM-Signature headers, disable DKIM verification to avoid
1338 a resource-consumption attack. The limit is set at twenty.
1340 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1341 report of oldest_pass in ${authres } in consequence, and separate out
1342 some descriptions of reasons for verification fail.
1344 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1345 files in the spool were present and unlocked. A queue-runner could spot
1346 them, resulting in a duplicate delivery. Fix that by doing the unlock
1347 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1348 add more error-checking on spoolfile handling while that code is being
1351 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1352 No known attacks, no CVE, this is defensive hardening.
1354 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1355 a queue-runner could start a delivery while other operations were ongoing.
1356 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1357 Found and investigated by Tim Stewart. Fix by using the open message data
1358 file handle rather than opening another, and not locally closing it (which
1359 releases a lock) for that case, while creating the temporary .eml format
1360 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1362 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1363 $sender_verify_failure/$recipient_verify_failure to "random".
1365 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1368 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1369 Previously this would segfault.
1371 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1374 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1375 like zero, since the resolver should be doing this for us, But we need one
1376 as a CNAME but no MX presence gets the CNAME returned; we need to check
1377 that doesn't point to an MX to declare it "no MX returned" rather than
1378 "error, loop". A new main option is added so the older capability of
1379 following some limited number of chain links is maintained.
1381 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1383 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1384 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1385 now-deprecated earlier definitions used only specified the range up to TLS
1386 1.2 (in the older-version library docs).
1388 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1390 JH/15 Rework TLS client-side context management. Stop using a global, and
1391 explicitly pass a context around. This enables future use of TLS for
1392 connections to service-daemons (eg. malware scanning) while a client smtp
1393 connection is using TLS; with cutthrough connections this is quite likely.
1395 JH/16 Fix ARC verification to do AS checks in reverse order.
1397 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1399 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1400 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1401 Previously the "utf8" would be re-prepended for every additional message.
1403 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1404 Previously thery were accepted, resulting in issues when attempting to
1405 forward messages to a non-supporting MTA.
1407 PP/02 Let -n work with printing macros too, not just options.
1409 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1410 one parent address was copied, and bogus data was used at delivery-logging
1411 time. Either a crash (after delivery) or bogus log data could result.
1412 Discovery and analysis by Tim Stewart.
1414 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1415 Previously if the string ended mid-character, we did not insert the
1416 promised '?' replacement.
1418 PP/04 Documentation: current string operators work on bytes, not codepoints.
1420 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1421 should pack well giving a smaller memory footprint so better caching and
1422 therefore performance. Group the declarations where this can't be done so
1423 that the byte-sized flag variables are not interspersed among pointer
1424 variables, giving a better chance of good packing by the compiler.
1426 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1427 non-null, to avoid issues with sites running BATV. Previously reports were
1428 sent with an empty envelope sender so looked like bounces.
1430 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1431 The ignore_error flag wasn't being returned from the filter subprocess so
1432 was not set for later routers. Investigation and fix by Matthias Kurz.
1434 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1435 and a msg:complete for the whole, when a message is manually removed using
1436 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1438 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1439 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1440 hope that is portable enough.
1442 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1443 requiring a known-CA anchor certificate; make it now rely entirely on the
1444 TLSA as an anchor. Checking the name on the leaf cert against the name
1445 on the A-record for the host is still done for TA (but not for EE mode).
1447 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1448 included in delivery lines for non-proxied connections, when compiled with
1449 SUPPORT_SOCKS and running with proxy logging enabled.
1451 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1452 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1453 move the existing event to fire before the normal logging of message
1454 failure so that custom logging is bracketed by normal logging.
1456 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1457 msg:fail:internal event. Developement by Matthias Kurz.
1459 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1460 far too small for todays use of crypto signatures stored there. Go all
1461 the way to the max DNS message size of 64kB, even though this might be
1462 overmuch for IOT constrained device use.
1464 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1465 copy a string over itself. The library routine is documented as not
1466 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1468 JH/32 For main options check_spool_space and check_inode_space, where the
1469 platform supports 64b integers, support more than the previous 2^31 kB
1470 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1471 the previous G, M, k.
1473 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1474 $authenticated_fail_id variable on authentication failure. Previously
1477 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1478 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1479 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1480 GNUTLS_SEC_PARAM_MEDIUM.
1482 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1483 side. Previously we would continue as if no SNI had been received.
1485 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1486 "<" character, which should be a list-separator specification, we walked
1487 off past the nul-terimation.
1489 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1490 causes) even when the retry time is not yet met. Previously they were
1491 not, meaning that when (say) an account was over-quota and temp-rejecting,
1492 and multiple senders' messages were queued, only one sender would get
1493 notified on each configured delay_warning cycle.
1495 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1497 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1498 cipher-suites, an error can be left on the stack even for a succeeding
1499 accept; this results in impossible error messages when a later operation
1502 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1503 return error codes indicating retry. Under TLS1.3 this becomes required.
1505 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1506 it only wrote the new authenticators, resulting in a lack of tracking of
1507 peer changes of ESMTP extensions until the next cache flush.
1509 JH/41 Fix the loop reading a message header line to check for integer overflow,
1510 and more-often against header_maxsize. Previously a crafted message could
1511 induce a crash of the recive process; now the message is cleanly rejected.
1513 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1514 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1520 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1521 When redis_servers is set to a list of > 1 element, and the Redis servers
1522 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1523 case of MOVED into a DEFER case instead, thus moving the query onto the
1524 next server in the list. For a cluster of N elements, all N servers must
1525 be defined in redis_servers.
1527 GF/02 Catch and remove uninitialized value warning in exiqsumm
1528 Check for existence of @ARGV before looking at $ARGV[0]
1530 JH/01 Replace the store_release() internal interface with store_newblock(),
1531 which internalises the check required to safely use the old one, plus
1532 the allocate and data copy operations duplicated in both (!) of the
1533 extant use locations.
1535 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1536 modifier. This matches the restriction on the commandline.
1538 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1539 Previously only the last row was returned.
1541 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1542 we assumed that tags in the header were well-formed, and parsed the
1543 element content after inspecting only the first char of the tag.
1544 Assumptions at that stage could crash the receive process on malformed
1547 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1548 While running the DKIM ACL we operate on the Permanent memory pool so that
1549 variables created with "set" persist to the DATA ACL. Also (at any time)
1550 DNS lookups that fail create cache records using the Permanent pool. But
1551 expansions release any allocations made on the current pool - so a dnsdb
1552 lookup expansion done in the DKIM ACL releases the memory used for the
1553 DNS negative-cache, and bad things result. Solution is to switch to the
1554 Main pool for expansions.
1555 While we're in that code, add checks on the DNS cache during store_reset,
1556 active in the testsuite.
1557 Problem spotted, and debugging aided, by Wolfgang Breyha.
1559 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1560 When none of the hosts presented to a transport match an already-open
1561 connection, close it and proceed with the list. Previously we would
1562 queue the message. Spotted by Lena with Yahoo, probably involving
1565 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1566 Previously a spurious "250 OK id=" response was appended to the proper
1569 JH/08 The "support for" informational output now, which built with Content
1570 Scanning support, has a line for the malware scanner interfaces compiled
1571 in. Interface can be individually included or not at build time.
1573 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1574 by the template makefile "src/EDITME". The "STREAM" support for an older
1575 ClamAV interface method is removed.
1577 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1578 rows affected is given instead).
1580 JH/11 The runtime Berkeley DB library version is now additionally output by
1581 "exim -d -bV". Previously only the compile-time version was shown.
1583 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1584 SMTP connection. Previously, when one had more recipients than the
1585 first, an abortive onward connection was made. Move to full support for
1586 multiple onward connections in sequence, handling cutthrough connection
1587 for all multi-message initiating connections.
1589 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1590 routers. Previously, a multi-recipient message would fail to match the
1591 onward-connection opened for the first recipient, and cause its closure.
1593 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1594 a timeout on read on a GnuTLS initiating connection, resulting in the
1595 initiating connection being dropped. This mattered most when the callout
1596 was marked defer_ok. Fix to keep the two timeout-detection methods
1599 JH/15 Relax results from ACL control request to enable cutthrough, in
1600 unsupported situations, from error to silently (except under debug)
1601 ignoring. This covers use with PRDR, frozen messages, queue-only and
1604 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1606 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1607 metadata, resulting in a crash in free().
1609 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1610 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1611 Broken also in d185889f4, with init system revamp.
1613 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1614 Previously we abruptly closed the connection after reading a malware-
1615 found indication; now we go on to read the "scan ok" response line,
1618 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1619 ACL. Previously, a crash would result.
1621 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1622 macro text after a replacement (previously it was only once per line) and
1623 by skipping builtin macros when searching for an uppercase lead character.
1625 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1626 for the build is renamed.
1628 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1629 was allocated for every new TLS startup, meaning one per message. Fix
1630 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1632 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1633 reported the original. Fix to report (as far as possible) the ACL
1634 result replacing the original.
1636 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1637 OpenSSL. Certificate information is loaded for every new TLS startup,
1638 and the resources needed to be freed.
1640 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1642 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1645 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1646 DATA response info to the (existing) per-recipient response info for
1647 the "C=" log element. It can have useful tracking info from the
1648 destination system. Patch from Simon Arlott.
1650 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1651 length value. Previously this would segfault.
1653 HS/02 Support Avast multiline protoocol, this allows passing flags to
1654 newer versions of the scanner.
1656 JH/28 Ensure that variables possibly set during message acceptance are marked
1657 dead before release of memory in the daemon loop. This stops complaints
1658 about them when the debug_store option is enabled. Discovered specifically
1659 for sender_rate_period, but applies to a whole set of variables.
1660 Do the same for the queue-runner and queue-list loops, for variables set
1661 from spool message files. Do the same for the SMTP per-message loop, for
1662 certain variables indirectly set in ACL operations.
1664 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1665 as a multi-recipient message from a mailinglist manager). The coding had
1666 an arbitrary cutoff number of characters while checking for more input;
1667 enforced by writing a NUL into the buffer. This corrupted long / fast
1668 input. The problem was exposed more widely when more pipelineing of SMTP
1669 responses was introduced, and one Exim system was feeding another.
1670 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1671 receiving system, and refused recipients seen by the sending system
1672 (propating to people being dropped from mailing lists).
1673 Discovered and pinpointed by David Carter.
1675 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1676 replaced by the ${authresults } expansion.
1678 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1680 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1681 allows proper process termination in container environments.
1683 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1684 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1686 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1687 and "err_perm", deprecated since 4.83 when the RFC-defined words
1688 "temperror" and "permerror" were introduced.
1690 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1691 transport-filters or DKIM-signing. The restriction was lost in the
1692 consolidation of verify-callout and delivery SMTP handling.
1693 Extend the restriction to also cover ARC-signing.
1695 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1696 in defer=pass mode supply a 450 to the initiator. Previously the message
1699 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1700 tls_require_ciphers is used as before.
1702 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1703 "pass_unscanned". Only tmpfails from the scanner are written to
1704 the paniclog, as they may require admin intervention (permission
1705 denied, license issues). Other scanner errors (like decompression
1706 bombs) do not cause a paniclog entry.
1708 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1709 Previously it was possible to log spurious information in receive log
1712 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1713 triggered odd behaviour from Outlook Express clients.
1715 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1718 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1719 since the IETF WG has not yet settled on that versus the original
1720 "bare" representation.
1722 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1723 Previously the millisecond value corrupted the output.
1724 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1725 corrupted the output.
1731 JH/01 Rework error string handling in TLS interface so that the caller in
1732 more cases is responsible for logging. This permits library-sourced
1733 string to be attached to addresses during delivery, and collapses
1734 pairs of long lines into single ones.
1736 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1737 during configuration. Wildcards are allowed and expanded.
1739 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1740 This permits better logging.
1742 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1743 do not close it down and have the child transport start it up again on
1744 the passed-on TCP connection. Instead, proxy the child (and any
1745 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1746 affected: the continued delivery log lines do not have any DNSSEC, TLS
1747 Certificate or OCSP information. TLS cipher information is still logged.
1749 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1750 identical IP addresses on different listening ports. Will also affect
1753 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1754 add noisy ifdef guards to special-case this sillyness.
1755 Patch from Bernd Kuhls.
1757 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1758 than 255 are no longer allowed.
1760 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1761 Disable the session-cache too, which might reduce our load. Since we
1762 currrectly use a new context for every connection, both as server and
1763 client, there is no benefit for these.
1764 GnuTLS appears to not support tickets server-side by default (we don't
1765 call gnutls_session_ticket_enable_server()) but client side is enabled
1766 by default on recent versions (3.1.3 +) unless the PFS priority string
1769 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1770 <https://reproducible-builds.org/specs/source-date-epoch/>.
1772 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1773 the check for any unsuccessful recipients did not notice the limit, and
1774 erroneously found still-pending ones.
1776 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1777 MSG_MORE. Only in-clear (not on TLS connections).
1779 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1780 transport-filter is involved we can buffer the headers in memory for
1781 creating the signature, and read the spool data file once for the
1782 signature and again for transmission.
1784 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1785 4.77 as the kernel support then wasn't solid, having issues in 64bit
1786 mode. Now, it's been long enough. Add support for FreeBSD also.
1788 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1789 case where the routing stage had gathered several addresses to send to
1790 a host before calling the transport for the first, we previously failed
1791 to close down TLS in the old transport process before passing the TCP
1792 connection to the new process. The new one sent a STARTTLS command
1793 which naturally failed, giving a failed delivery and bloating the retry
1794 database. Investigation and fix prototype from Wolfgang Breyha.
1796 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1797 false-negatives in the check that the sender had not preempted a response
1798 or prompt from Exim (running as a server), due to that code's lack of
1799 awareness of the SMTP input buffering.
1801 PP/04 Add commandline_checks_require_admin option.
1802 Exim drops privileges sanely, various checks such as -be aren't a
1803 security problem, as long as you trust local users with access to their
1804 own account. When invoked by services which pass untrusted data to
1805 Exim, this might be an issue. Set this option in main configuration
1806 AND make fixes to the calling application, such as using `--` to stop
1809 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1810 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1811 responses to those, into a single TLS record each way (this usually means
1812 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1815 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1816 affects you only if you're dancing at the edge of the param size limits.
1817 If you are, and this message makes sense to you, then: raise the
1818 configured limit or use OpenSSL 1.1. Nothing we can do for older
1821 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1822 cmdline element to get the documented default one. Previously it was
1825 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1826 are unsuable for non-message-specific reasons - eg. connection timeout,
1827 banner-time rejection.
1829 JH/16 Fix logging of delivery remote port, when specified by router, under
1832 PP/06 Repair manualroute's ability to take options in any order, even if one
1833 is the name of a transport.
1836 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1838 JH/17 Change the list-building routines interface to use the expanding-string
1839 triplet model, for better allocation and copying behaviour.
1841 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1842 Previously it was constructed the first time a possibly-matching string
1843 was met in the configuration file input during startup; now it is done
1846 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1847 compatible one, to avoid the (poorly documented) possibility of a config
1848 file in the working directory redirecting the DB files, possibly correpting
1849 some existing file. CVE-2017-10140 assigned for BDB.
1851 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1852 cache-hot. Previously, although the result was properly cached, the
1853 initial verify call returned a defer.
1855 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1856 the main verify for receipient in uncached-mode.
1858 JH/22 Retire historical build files to an "unsupported" subdir. These are
1859 defined as "ones for which we have no current evidence of testing".
1861 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1862 if present. Previously it was ignored.
1864 JH/24 Start using specified-initialisers in C structure init coding. This is
1865 a C99 feature (it's 2017, so now considered safe).
1867 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1868 if was a fixed-sized field and bitmask ops via macros; it is now more
1871 PP/07 GitHub PR 56: Apply MariaDB build fix.
1872 Patch provided by Jaroslav Škarvada.
1874 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1875 during Coverity cleanups [4.87 JH/47]
1876 Diagnosis and fix provided by Michael Fischer v. Mollard.
1878 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1879 the right size to place the terminating semicolon on its own folded
1880 line, the header hash was calculated to an incorrect value thanks to
1881 the (relaxed) space the fold became.
1883 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1884 and confused the parent.
1886 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1887 which could crash as a result. This could lead to undeliverable messages.
1889 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1892 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1893 matters on fast-turnover and PID-randomising systems, which were getting
1894 out-of-order delivery.
1896 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1897 a possibly-overlapping copy. The symptom was that "Remote host closed
1898 connection in response to HELO" was logged instead of the actual 4xx
1901 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1902 Previously only that bufferd was discarded, resulting in SYMTP command
1905 JH/32 DKIM: when a message has multiple signatures matching an identity given
1906 in dkim_verify_signers, run the dkim acl once for each. Previously only
1907 one run was done. Bug 2189.
1909 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1910 "panic the current process" to "deliberately defer". The panic log is
1911 still written with the problem list name; the mail and reject logs now
1912 get a temp-reject line for the message that was being handled, saying
1913 something like "domains check lookup or other defer". The SMTP 451
1914 message is still "Temporary local problem".
1916 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1917 A crafted sequence of BDAT commands could result in in-use memory beeing
1918 freed. CVE-2017-16943.
1920 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1921 from SMTP input. Previously it was always done; now only done for DATA
1922 and not BDAT commands. CVE-2017-16944.
1924 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1925 to the message (such as an overlong header line). Previously this was
1926 not done and we did not exit BDAT mode. Followon from the previous item
1927 though a different problem.
1933 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1934 than -2003 did; needs libidn2 in addition to libidn.
1936 JH/02 The path option on a pipe transport is now expanded before use.
1938 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1939 Patch provided by "Björn", documentation fix added too.
1941 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1942 missing a wire-to-host endian conversion.
1944 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1945 close after a BDAT command line could be taken as a following command,
1946 giving a synch failure. Fix by only checking for synch immediately
1947 before acknowledging the chunk.
1949 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1950 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1951 macro. Patches provided by Josh Soref.
1953 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1954 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1955 by IANA as a service extension. However, John Klensin suggests that we
1958 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1959 the dkim code may be unix-mode line endings rather than smtp wire-format
1960 CRLF, so prepend a CR to any bare LF.
1962 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1963 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1965 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1966 the first were themselves being wrongly included in the feed into dkim
1967 processing; with most chunk sizes in use this resulted in an incorrect
1968 body hash calculated value.
1970 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1971 DKIM signature block, for verification. Although advised against by
1972 standards it is specifically not ruled illegal.
1974 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1976 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1977 missing a body hash (the bh= tag).
1979 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1980 It seems that HAProxy sends the Proxy Protocol information in clear and
1981 only then does a TLS startup, so do the same.
1983 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1984 TCP connections (such as for Spamd) unless the daemon successfully set
1985 Fast Open mode on its listening sockets. This fixes breakage seen on
1986 too-old kernels or those not configured for Fast Open, at the cost of
1987 requiring both directions being enabled for TFO, and TFO never being used
1988 by non-daemon-related Exim processes.
1990 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1991 endings, at least on the first header line. Try to canonify any that get
1992 past that check, despite the cost.
1994 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1995 now limited to an arbitrary five deep, while parsing addresses with the
1996 strip_excess_angle_brackets option enabled.
1998 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1999 instead leave the unprompted TLS handshake in socket buffer for the
2000 TLS library to consume.
2002 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
2004 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
2006 JH/16 Drop variables when they go out of scope. Memory management drops a whole
2007 region in one operation, for speed, and this leaves assigned pointers
2008 dangling. Add checks run only under the testsuite which checks all
2009 variables at a store-reset and panics on a dangling pointer; add code
2010 explicitly nulling out all the variables discovered. Fixes one known
2011 bug: a transport crash, where a dangling pointer for $sending_ip_address
2012 originally assigned in a verify callout, is re-used.
2014 PP/06 Drop '.' from @INC in various Perl scripts.
2016 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2018 PP/08 Reduce a number of compilation warnings under clang; building with
2019 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2020 should be warning-free.
2022 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2024 HS/01 Fix portability problems introduced by PP/08 for platforms where
2025 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2027 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2028 chunk. This allows us to accept broken chunked messages. We need a more
2029 general solution here.
2031 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2032 already-broken messages in the queue.
2034 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2036 JH/19 Fix reference counting bug in routing-generated-address tracking.
2042 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2043 supports it and a size is available (ie. the sending peer gave us one).
2045 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2046 years of being deprecated). The replacements are the ACLs
2047 acl_smtp_mime and acl_not_smtp_mime.
2049 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2050 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2051 or even an in-clear connection were permitted. Now, if the host lookup
2052 was dnssec and dane was requested then the host is only used if the
2053 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2054 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2055 if one fails this test.
2056 This means that a poorly-configured remote DNS will make it incommunicado;
2057 but it protects against a DNS-interception attack on it.
2059 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2060 non-noisy when a race steals the message being considered.
2062 JH/05 If main configuration option tls_certificate is unset, generate a
2063 self-signed certificate for inbound TLS connections.
2065 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2066 in rewrites and routers.
2068 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2069 and logged a warning sing 4.83; now they are a configuration file error.
2071 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2072 (lacking @domain). Apply the same qualification processing as RCPT.
2074 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2076 JH/10 Support ${sha256:} applied to a string (as well as the previous
2079 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2080 a cutthrough deliver is pending, as we always want to make a connection.
2081 This also avoids re-routing the message when later placing the cutthrough
2082 connection after a verify cache hit.
2083 Do not update it with the verify result either.
2085 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2086 when routing results in more than one destination address.
2088 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2089 signing (which inhibits the cutthrough capability). Previously only
2090 the presence of an option was tested; now an expansion evaluating as
2091 empty is permissible (obviously it should depend only on data available
2092 when the cutthrough connection is made).
2094 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2095 the relevant preceding SMTP command did not note the pipelining mode.
2097 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2098 Previously they were not counted.
2100 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2101 as one having no matching records. Previously we deferred the message
2102 that needed the lookup.
2104 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2105 distinguished as "(=".
2107 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2108 for missing MX records. Previously it only worked for missing A records.
2110 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2112 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2113 after the data-go-ahead and data-ack. Patch from Jason Betts.
2115 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2116 even for a "none" policy. Patch from Tony Meyer.
2118 JH/22 Fix continued use of a connection for further deliveries. If a port was
2119 specified by a router, it must also match for the delivery to be
2122 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2123 When one of the recipients of a message was unsuitable for the connection
2124 (has no matching addresses), we lost track of needing to mark it
2125 deferred. As a result mail would be lost.
2127 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2129 JH/25 Decoding ACL controls is now done using a binary search; the source code
2130 takes up less space and should be simpler to maintain. Merge the ACL
2131 condition decode tables also, with similar effect.
2133 JH/26 Fix problem with one_time used on a redirect router which returned the
2134 parent address unchanged. A retry would see the parent address marked as
2135 delivered, so not attempt the (identical) child. As a result mail would
2138 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2139 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2140 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2143 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2144 Main config options check_{log,spool}_{inodes,space} are now
2145 100 inodes, 10MB unless set otherwise in the configuration.
2147 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2148 Previously it only applied to the main-section connection policy
2151 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2153 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2154 by me. Added RFC7919 DH primes as an alternative.
2156 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2157 are not in the system include path.
2159 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2160 GnuTLS, when a session startup failed (eg because the client disconnected)
2161 Exim did stdio operations after fclose. This was exposed by a recent
2162 change which nulled out the file handle after the fclose.
2164 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2165 signed directly by the cert-signing cert, rather than an intermediate
2166 OCSP-signing cert. This is the model used by LetsEncrypt.
2168 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2170 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2171 an incoming connection.
2173 HS/02 Bug 1802: Do not half-close the connection after sending a request
2176 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2177 fallback to "prime256v1".
2179 JH/34 SECURITY: Use proper copy of DATA command in error message.
2180 Could leak key material. Remotely exploitable. CVE-2016-9963.
2186 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2187 and 3.4.4 - once the server is enabled to respond to an OCSP request
2188 it does even when not requested, resulting in a stapling non-aware
2189 client dropping the TLS connection.
2191 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2192 support variable-length bit vectors. No functional change.
2194 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2195 The I= interface field on outgoing lines is now after the H= remote
2196 host field, same as incoming lines. There is a separate
2197 outgoing_interface log selector which allows you to disable the
2200 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2201 If not running log_selector +smtp_connection the mainlog would be held
2202 open indefinitely after a "too many connections" event, including to a
2203 deleted file after a log rotate. Leave the per net connection logging
2204 leaving it open for efficiency as that will be quickly detected by the
2205 check on the next write.
2207 HS/01 Bug 1671: Fix post transport crash.
2208 Processing the wait-<transport> messages could crash the delivery
2209 process if the message IDs didn't exist for some reason. When
2210 using 'split_spool_directory=yes' the construction of the spool
2211 file name failed already, exposing the same netto behaviour.
2213 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2214 mime_regex ACL conditions.
2216 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2217 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2218 to HELO, local diagnostic string.
2220 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2221 log line to debug. Even when configured with a tls authenticator many
2222 client connections are expected to not authenticate in this way, so
2223 an authenticate fail is not an error.
2225 HS/02 Add the Exim version string to the process info. This way exiwhat
2226 gives some more detail about the running daemon.
2228 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2229 matter for fast-change records such as DNSBLs.
2231 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2232 retry record, even if constant. There may be multiple transports with
2233 different interface settings and the retry behaviour needs to be kept
2236 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2238 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2240 JH/10 Bug 840: fix log_defer_output option of pipe transport
2242 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2243 hosts_randomize. This matters a lot when combined with mua_wrapper.
2245 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2246 ${quote_pgsql:<string>} operator.
2248 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2250 JH/14 Change header file name for freeradius-client. Relevant if compiling
2251 with Radius support; from the Gentoo tree and checked under Fedora.
2253 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2255 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2256 option transport_filter, meaning no filtering.
2258 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2260 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2261 defaults to "*" (all hosts). The variable is now available when not built
2262 with TLS, default unset, mainly to enable keeping the testsuite sane.
2263 If a server certificate is not supplied (via tls_certificate) an error is
2264 logged, and clients will find TLS connections fail on startup. Presumably
2265 they will retry in-clear.
2266 Packagers of Exim are strongly encouraged to create a server certificate
2267 at installation time.
2269 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2270 with the $config_file variable.
2272 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2273 in transport context, after the attempt, and per-recipient. The latter type
2274 is per host attempted. The event data is the error message, and the errno
2275 information encodes the lookup type (A vs. MX) used for the (first) host,
2276 and the trailing two digits of the smtp 4xx response.
2278 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2279 to write to mainlog (or rejectlog, paniclog) in the window between file
2280 creation and permissions/ownership being changed. Particularly affects
2281 installations where exicyclog is run as root, rather than exim user;
2282 result is that the running daemon panics and dies.
2284 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2286 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2287 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2288 "pri" and "weight". Note that the previous implicit priority given by the
2289 list order is no longer honoured.
2291 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2292 for DKIM processing.
2294 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2295 by defining SUPPORT_SOCKS.
2297 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2298 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2299 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2300 variables are renamed to proxy_{local,external}_{address,port}.
2302 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2303 for a build by defining SUPPORT_I18N
2305 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2306 of the query string, and make ${quote_redis:} do that quoting.
2308 JH/29 Move Events support from Experimental to mainline, enabled by default
2309 and removable for a build by defining DISABLE_EVENT.
2311 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2313 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2314 cached by the daemon.
2316 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2317 by defining LOOKUP_REDIS. The libhiredis library is required.
2319 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2320 keys are given for lookup.
2322 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2323 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2324 only supported when built with TLS support. The PolarSSL SHA routines
2325 are still used when the TLS library is too old for convenient support.
2327 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2328 openssl_options), for security. OpenSSL forces this from version 1.1.0
2329 server-side so match that on older versions.
2331 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2332 allocation for $value could be released as the expansion processing
2333 concluded, but leaving the global pointer active for it.
2335 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2336 and to use the domains and local_parts ACL conditions.
2338 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2339 incorrectly not doubled on cutthrough transmission, hence seen as a
2340 body-termination at the receiving system - resulting in truncated mails.
2341 Commonly the sender saw a TCP-level error, and retransmitted the message
2342 via the normal store-and-forward channel. This could result in duplicates
2343 received - but deduplicating mailstores were liable to retain only the
2344 initial truncated version.
2346 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2348 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2350 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2351 we're in there, support oversigning also; bug 1309.
2353 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2355 HS/04 Add support for keep_environment and add_environment options.
2357 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2358 either intentional arithmetic overflow during PRNG, or testing config-
2361 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2362 delivery resulted in actual delivery. Cancel cutthrough before DATA
2365 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2366 rejects a recipient: pass the reject to the originator.
2368 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2369 Many were false-positives and ignorable, but it's worth fixing the
2372 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2373 for the new environment-manipulation done at startup. Move the routines
2374 from being local to tls.c to being global via the os.c file.
2376 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2377 an extract embedded as result-arg for a map, the first arg for extract
2378 is unavailable so we cannot tell if this is a numbered or keyed
2379 extraction. Accept either.
2385 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2388 JH/02 The smtp transport option "multi_domain" is now expanded.
2390 JH/03 The smtp transport now requests PRDR by default, if the server offers
2393 JH/04 Certificate name checking on server certificates, when exim is a client,
2394 is now done by default. The transport option tls_verify_cert_hostnames
2395 can be used to disable this per-host. The build option
2396 EXPERIMENTAL_CERTNAMES is withdrawn.
2398 JH/05 The value of the tls_verify_certificates smtp transport and main options
2399 default to the word "system" to access the system default CA bundle.
2400 For GnuTLS, only version 3.0.20 or later.
2402 JH/06 Verification of the server certificate for a TLS connection is now tried
2403 (but not required) by default. The verification status is now logged by
2404 default, for both outbound TLS and client-certificate supplying inbound
2407 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2410 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2411 Status Notification (bounce) messages are now MIME format per RFC 3464.
2412 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2413 under the control of the dsn_advertise_hosts option, and routers may
2414 have a dsn_lasthop option.
2416 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2417 default, modifiable by a malware= option. The list separator for
2418 the options can now be changed in the usual way. Bug 68.
2420 JH/10 The smtp_receive_timeout main option is now expanded before use.
2422 JH/11 The incoming_interface log option now also enables logging of the
2423 local interface on delivery outgoing connections.
2425 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2426 if the interface and destination host and port all match.
2428 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2431 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2432 Patch from Andrew Lewis.
2434 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2435 now supports optional time-restrictions, weighting, and priority
2436 modifiers per server. Patch originally by <rommer@active.by>.
2438 JH/16 The spamd_address main option now supports a mixed list of local
2439 and remote servers. Remote servers can be IPv6 addresses, and
2440 specify a port-range.
2442 JH/17 Bug 68: The spamd_address main option now supports an optional
2443 timeout value per server.
2445 JH/18 Bug 1581: Router and transport options headers_add/remove can
2446 now have the list separator specified.
2448 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2451 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2454 JH/21 Support for the A6 type of dns record is withdrawn.
2456 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2457 rather than the verbs used.
2459 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2460 from 255 to 1024 chars.
2462 JH/24 Verification callouts now attempt to use TLS by default.
2464 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2465 are generic router options now. The defaults didn't change.
2467 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2468 Original patch from Alexander Shikoff, worked over by JH.
2470 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2471 files if ZCAT_COMMAND is not executable.
2473 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2475 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2477 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2478 Normally benign, it bites when the pair was led to by a CNAME;
2479 modern usage is to not canonicalize the domain to a CNAME target
2480 (and we were inconsistent anyway for A-only vs AAAA+A).
2482 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2484 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2485 when evaluating $sender_host_dnssec.
2487 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2488 $sender_helo_dnssec variable.
2490 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2492 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2494 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2496 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2497 documented as working, but never had. Support all but $spam_report.
2499 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2500 added for tls authenticator.
2502 HS/03 Add perl_taintmode main config option
2508 TL/01 When running the test suite, the README says that variables such as
2509 no_msglog_check are global and can be placed anywhere in a specific
2510 test's script, however it was observed that placement needed to be near
2511 the beginning for it to behave that way. Changed the runtest perl
2512 script to read through the entire script once to detect and set these
2513 variables, reset to the beginning of the script, and then run through
2514 the script parsing/test process like normal.
2516 TL/02 The BSD's have an arc4random API. One of the functions to induce
2517 adding randomness was arc4random_stir(), but it has been removed in
2518 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2519 function when detected.
2521 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2522 cause callback expansion.
2524 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2525 syntax errors in an expansion can be treated as a string instead of
2526 logging or causing an error, due to the internal use of bool_lax
2527 instead of bool when processing it.
2529 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2530 server certificates when making smtp deliveries.
2532 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2534 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2536 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2538 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2539 Merged patch from Sebastian Wiedenroth.
2541 JH/05 Fix results-pipe from transport process. Several recipients, combined
2542 with certificate use, exposed issues where response data items split
2543 over buffer boundaries were not parsed properly. This eventually
2544 resulted in duplicates being sent. This issue only became common enough
2545 to notice due to the introduction of connection certificate information,
2546 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2548 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2549 size buffer was used, resulting in syntax errors when an expansion
2552 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2553 version 3.3.6 or later.
2555 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2556 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2557 both become "event_action", the variables become $event_name, $event_data
2558 and $event_defer_errno. There is a new variable $verify_mode, usable in
2559 routers, transports and related events. The tls:cert event is now also
2560 raised for inbound connections, if the main configuration event_action
2563 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2564 early OCSP support, but no stapling (appears to be less than 1.0.0).
2566 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2567 server certificate names available under the smtp transport option
2568 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2571 JH/10 Time-related extraction expansions from certificates now use the main
2572 option "timezone" setting for output formatting, and are consistent
2573 between OpenSSL and GnuTLS compilations. Bug 1541.
2575 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2576 encoded parameter in the incoming message. Bug 1558.
2578 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2579 include certificate info, eximon was claiming there were spoolfile
2582 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2584 JH/14 Log delivery-related information more consistently, using the sequence
2585 "H=<name> [<ip>]" wherever possible.
2587 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2588 are problematic for Debian distribution, omit them from the release
2591 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2593 JH/16 Fix string representation of time values on 64bit time_t architectures.
2596 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2597 output list separator was used.
2602 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2603 checkers that were complaining about end of non-void function with no
2606 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2607 This was a regression introduced in 4.83 by another bugfix.
2609 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2611 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2612 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2618 TF/01 Correctly close the server side of TLS when forking for delivery.
2620 When a message was received over SMTP with TLS, Exim failed to clear up
2621 the incoming connection properly after forking off the child process to
2622 deliver the message. In some situations the subsequent outgoing
2623 delivery connection happened to have the same fd number as the incoming
2624 connection previously had. Exim would try to use TLS and fail, logging
2625 a "Bad file descriptor" error.
2627 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2628 utilities have not been installed.
2630 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2631 temporary space as the ACL may create new global variables.
2633 TL/01 LDAP support uses per connection or global context settings, depending
2634 upon the detected version of the libraries at build time.
2636 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2637 to extract and use the src ip:port in logging and expansions as if it
2638 were a direct connection from the outside internet. PPv2 support was
2639 updated based on HAProxy spec change in May 2014.
2641 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2643 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2644 Properly escape header and check for NULL return.
2646 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2649 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2651 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2652 characters in header names, implemented as a verify condition.
2653 Contributed by Michael Fischer v. Mollard.
2655 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2656 results permerror and temperror. Previous values are deprecated but
2657 still accepted. In a future release, err_perm and err_temp will be
2658 completely removed, which will be a backward incompatibility if the
2659 ACL tests for either of these two old results. Patch contributed by
2660 user bes-internal on the mailing list.
2662 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2664 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2665 selectors, in both main and reject logs.
2667 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2670 JH/07 Add malware type "sock" for talking to simple daemon.
2672 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2674 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2675 routers/transports under cutthrough routing.
2677 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2678 numbers. Touch up "bool" conditional to keep the same definition.
2680 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2682 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2684 JH/12 Expand items in router/transport headers_add or headers_remove lists
2685 individually rather than the list as a whole. Bug 1452.
2687 Required for reasonable handling of multiple headers_ options when
2688 they may be empty; requires that headers_remove items with embedded
2689 colons must have them doubled (or the list-separator changed).
2691 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2692 view the policy declared in the DMARC record. Currently, $dmarc_status
2693 is a combined value of both the record presence and the result of the
2696 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2698 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2699 dnslookup router and the smtp transport (applying to the forward
2702 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2703 of ldap servers used for a specific lookup. Patch provided by Heiko
2706 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2707 New variable $lookup_dnssec_authenticated for observability.
2709 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2710 Patch submitted by Lars Timman.
2712 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2714 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2715 Requires trusted mode and valid format message id, aborts otherwise.
2716 Patch contributed by Heiko Schlichting.
2718 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2719 certextract with support for various fields. Bug 1358.
2721 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2722 is requested by default, modifiable by smtp transport option
2725 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2726 operate on certificate variables to give certificate fingerprints
2727 Also new ${sha256:cert_variable}.
2729 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2731 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2732 Christian Aistleitner.
2734 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2736 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2737 file. Patch from Wolfgang Breyha.
2739 JH/25 Expand the coverage of the delivery $host and $host_address to
2740 client authenticators run in verify callout. Bug 1476.
2742 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2743 align with daemon_smtp_ports. Bug 72.
2745 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2746 support and error reporting did not work properly.
2748 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2749 and is readable. Patch from Andrew Colin Kissa.
2751 TL/14 Enhance documentation of ${run expansion and how it parses the
2752 commandline after expansion, particularly in the case when an
2753 unquoted variable expansion results in an empty value.
2755 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2757 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2758 by renaming away from it. Addresses GH issue 15, reported by
2761 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2763 TL/15 SECURITY: prevent double expansion in math comparison functions
2764 (can expand unsanitized data). Not remotely exploitable.
2771 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2773 PP/02 Make -n do something, by making it not do something.
2774 When combined with -bP, the name of an option is not output.
2776 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2779 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2780 $sender_host_name and config options to manage this, and basic check
2783 PP/05 DSCP support for outbound connections and control modifier for inbound.
2785 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2786 (Only plugin which currently uses this is kerberos4, which nobody should
2787 be using, but we should make it available and other future plugins might
2788 conceivably use it, even though it would break NAT; stuff *should* be
2789 using channel bindings instead).
2791 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2792 name; added for Sendmail compatibility; requires admin caller.
2793 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2794 just ignore it); requires trusted caller.
2795 Also parse but ignore: -Ac -Am -X<logfile>
2798 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2800 TL/02 Add +smtp_confirmation as a default logging option.
2802 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2803 Patch by Magnus Holmgren from 2007-02-20.
2805 TL/04 Bugzilla 1281 - Spec typo.
2806 Bugzilla 1283 - Spec typo.
2807 Bugzilla 1290 - Spec grammar fixes.
2809 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2811 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2813 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2814 mailing list by by Dmitry Isaikin.
2816 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2818 JH/02 Support "G" suffix to numbers in ${if comparisons.
2820 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2822 NM/01 Bugzilla 1197 - Spec typo
2823 Bugzilla 1196 - Spec examples corrections
2825 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2827 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2828 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2831 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2832 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2834 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2835 "acl {{name}{arg}...}", and optional args on acl condition
2838 JH/05 Permit multiple router/transport headers_add/remove lines.
2840 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2842 JH/07 Avoid using a waiting database for a single-message-only transport.
2843 Performance patch from Paul Fisher. Bugzilla 1262.
2845 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2848 JH/09 Add $headers_added variable, with content from use of ACL modifier
2849 add_header (but not yet added to the message). Bugzilla 199.
2851 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2852 Pulled from Bugzilla 817 by Wolfgang Breyha.
2854 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2856 (nb: this is the same fix as in Exim 4.80.1)
2858 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2861 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2864 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2866 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2867 advertise SMTP AUTH mechanism to us, instead of a generic
2868 protocol violation error. Also, make Exim more robust to bad
2869 data from the Dovecot auth socket.
2871 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2873 When a queue runner is handling a message, Exim first routes the
2874 recipient addresses, during which it prunes them based on the retry
2875 hints database. After that it attempts to deliver the message to
2876 any remaining recipients. It then updates the hints database using
2879 So if a recipient address works intermittently, it can get repeatedly
2880 deferred at routing time. The retry hints record remains fresh so the
2881 address never reaches the final cutoff time.
2883 This is a fairly common occurrence when a user is bumping up against
2884 their storage quota. Exim had some logic in its local delivery code
2885 to deal with this. However it did not apply to per-recipient defers
2886 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2888 This change adds a proper retry rule check during routing so that the
2889 final cutoff time is checked against the message's age. We only do
2890 this check if there is an address retry record and there is not a
2891 domain retry record; this implies that previous attempts to handle
2892 the address had the retry_use_local_parts option turned on. We use
2893 this as an approximation for the destination being like a local
2894 delivery, as in LMTP.
2896 I suspect this new check makes the old local delivery cutoff check
2897 redundant, but I have not verified this so I left the code in place.
2899 TF/02 Correct gecos expansion when From: is a prefix of the username.
2901 Test 0254 submits a message to Exim with the header
2905 When I ran the test suite under the user fanf2, Exim expanded
2906 the header to contain my full name, whereas it should have added
2907 a Resent-Sender: header. It erroneously treats any prefix of the
2908 username as equal to the username.
2910 This change corrects that bug.
2912 GF/01 DCC debug and logging tidyup
2913 Error conditions log to paniclog rather than rejectlog.
2914 Debug lines prefixed by "DCC: " to remove any ambiguity.
2916 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2918 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2919 Bug spotted by Jeremy Harris; was flawed since initial commit.
2920 Would have resulted in OCSP responses post-SNI triggering an Exim
2921 NULL dereference and crash.
2923 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2925 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2926 Bug detection, analysis and fix by Samuel Thibault.
2927 Bugzilla 1331, Debian bug #698092.
2929 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2931 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2932 Server implementation by Todd Lyons, client by JH.
2933 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2934 config variable "prdr_enable" controls whether the server
2935 advertises the facility. If the client requests PRDR a new
2936 acl_data_smtp_prdr ACL is called once for each recipient, after
2937 the body content is received and before the acl_smtp_data ACL.
2938 The client is controlled by both of: a hosts_try_prdr option
2939 on the smtp transport, and the server advertisement.
2940 Default client logging of deliveries and rejections involving
2941 PRDR are flagged with the string "PRDR".
2943 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2944 fclose(). Diagnosis by Todd Lyons.
2946 PP/17 Update configure.default to handle IPv6 localhost better.
2947 Patch by Alain Williams (plus minor tweaks).
2950 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2951 This is now consistent with GnuTLS, and is now documented: the
2952 previous undocumented portable approach to treating the option as
2953 unset was to force an expansion failure. That still works, and
2954 an empty string is now equivalent.
2956 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2957 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2958 not performing validation itself.
2960 PP/20 Added force_command boolean option to pipe transport.
2961 Patch from Nick Koston, of cPanel Inc.
2963 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2966 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2968 PP/21 Fix eximon continuous updating with timestamped log-files.
2969 Broken in a format-string cleanup in 4.80, missed when I repaired the
2970 other false fix of the same issue.
2971 Report and fix from Heiko Schlichting.
2974 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2975 Report from Prashanth Katuri.
2977 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2978 It's SecureTransport, so affects any MacOS clients which use the
2979 system-integrated TLS libraries, including email clients.
2981 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2982 using a MIME ACL for non-SMTP local injection.
2983 Report and assistance in diagnosis by Warren Baker.
2985 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2987 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2989 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2990 last id that failed so it may be referenced in subsequent ACL's.
2992 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2995 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2996 ldap library initialization, allowing self-signed CA's to be
2997 used. Also properly sets require_cert option later in code by
2998 using NULL (global ldap config) instead of ldap handle (per
2999 session). Bug diagnosis and testing by alxgomz.
3001 TL/12 Enhanced documentation in the ratelimit.pl script provided in
3002 the src/util/ subdirectory.
3004 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
3005 renamed to Transport Post Delivery Action by Jeremy Harris, as
3008 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
3009 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
3010 redis_servers = needs to be configured which will be used by the redis
3011 lookup. Patch from Warren Baker, of The Packet Hub.
3013 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3015 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3016 hostname or reverse DNS when processing a host list. Used suggestions
3017 from multiple comments on this bug.
3019 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3021 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3022 Missed a few lines, added it to make the runtest require no keyboard
3025 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3026 contains upper case chars. Make router use caseful_local_part.
3028 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3029 support when GnuTLS has been built with p11-kit.
3035 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3037 This, or similar/improved, will also be change PP/11 of 4.82.
3043 PP/01 Handle short writes when writing local log-files.
3044 In practice, only affects FreeBSD (8 onwards).
3045 Bugzilla 1053, with thanks to Dmitry Isaikin.
3047 NM/01 Bugzilla 949 - Documentation tweak
3049 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3052 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3054 PP/02 Implemented gsasl authenticator.
3056 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3058 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3059 `pkg-config foo` for cflags/libs.
3061 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3062 with rest of GSASL and with heimdal_gssapi.
3064 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3065 `pkg-config foo` for cflags/libs for the TLS implementation.
3067 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3068 properties get this fed in as external SSF. A number of robustness
3069 and debugging improvements to the cyrus_sasl authenticator.
3071 PP/08 cyrus_sasl server now expands the server_realm option.
3073 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3074 Patch by Jeremy Harris.
3076 PP/10 Added dbmjz lookup type.
3078 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3080 PP/12 MAIL args handles TAB as well as SP, for better interop with
3081 non-compliant senders.
3082 Analysis and variant patch by Todd Lyons.
3084 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3085 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3086 Patch from Dirk Mueller <dmueller@suse.com>
3088 PP/13 tls_peerdn now print-escaped for spool files.
3089 Observed some $tls_peerdn in wild which contained \n, which resulted
3090 in spool file corruption.
3092 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3093 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3094 or write after TLS renegotiation, which otherwise led to messages
3097 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3098 as a tracking header (ie: a signed header comes before the signature).
3099 Patch from Wolfgang Breyha.
3101 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3102 comma-sep list; embedded commas doubled.
3104 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3106 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3108 Report and patch from Dmitry Banschikov.
3110 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3111 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3112 failures. We appear to now support TLS1.1+ with Exim.
3114 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3115 lets Exim select keys and certificates based upon TLS SNI from client.
3116 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3117 before an outbound SMTP session. New log_selector, +tls_sni.
3119 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3120 NULL dereference. Report and patch from Alun Jones.
3122 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3123 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3124 Not seeing resolver debug output on NetBSD, but suspect this is a
3125 resolver implementation change.
3127 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3128 Left warnings. Added "eximon gdb" invocation mode.
3130 PP/21 Defaulting "accept_8bitmime" to true, not false.
3132 PP/22 Added -bw for inetd wait mode support.
3134 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3135 locate the relevant includes and libraries. Made this the default.
3137 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3138 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3140 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3141 This may cause build issues on older platforms.
3143 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3144 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3145 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3146 Added SNI support via GnuTLS too.
3147 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3149 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3151 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3152 Applied second patch from Janne, implementing suggestion to default
3153 multiple-strings-in-record handling to match SPF spec.
3155 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3157 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3158 read-only, out of scope).
3159 Patch from Wolfgang Breyha, report from Stuart Northfield.
3161 PP/29 Fix three issues highlighted by clang analyser static analysis.
3162 Only crash-plausible issue would require the Cambridge-specific
3163 iplookup router and a misconfiguration.
3164 Report from Marcin Mirosław.
3166 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3168 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3169 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3170 As part of this, removing so much warning spew let me fix some minor
3171 real issues in debug logging.
3173 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3174 assignment on my part. Fixed.
3176 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3177 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3178 Janne Snabb (who went above and beyond: thank you).
3180 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3181 string otherwise requires a connection and a bunch more work and it's
3182 relatively easy to get wrong. Should also expose TLS library linkage
3185 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3186 64-bit ${eval} (JH/03).
3188 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3189 GNU libc to support some of the 64-bit stuff, should not lead to
3190 conflicts. Defined before os.h is pulled in, so if a given platform
3191 needs to override this, it can.
3193 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3194 protection layer was required, which is not implemented.
3195 Bugzilla 1254, patch from Wolfgang Breyha.
3197 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3198 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3199 tls_dhparam take prime identifiers. Also unbreak combination of
3200 OpenSSL+DH_params+TLSSNI.
3202 PP/39 Disable SSLv2 by default in OpenSSL support.
3208 PP/01 Solaris build fix for Oracle's LDAP libraries.
3209 Bugzilla 1109, patch from Stephen Usher.
3211 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3213 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3216 TF/02 Fix a couple more cases where we did not log the error message
3217 when unlink() failed. See also change 4.74-TF/03.
3219 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3220 lock up or crash if it happened to be inside a call to libc when it
3221 got a SIGUSR1 from exiwhat.
3223 The SIGUSR1 handler appends the current process status to the process
3224 log which is later printed by exiwhat. It used to use the general
3225 purpose logging code to do this, but several functions it calls are
3226 not safe for signals.
3228 The new output code in the SIGUSR1 handler is specific to the process
3229 log, and simple enough that it's easy to inspect for signal safety.
3230 Removing some special cases also simplifies the general logging code.
3231 Removing the spurious timestamps from the process log simplifies
3234 TF/04 Improved ratelimit ACL condition.
3236 The /noupdate option has been deprecated in favour of /readonly which
3237 has clearer semantics. The /leaky, /strict, and /readonly update modes
3238 are mutually exclusive. The update mode is no longer included in the
3239 database key; it just determines when the database is updated. (This
3240 means that when you upgrade Exim will forget old rate measurements.)
3242 Exim now checks that the per_* options are used with an update mode that
3243 makes sense for the current ACL. For example, when Exim is processing a
3244 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3245 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3246 must specify per_mail/readonly. If you omit the update mode it defaults to
3247 /leaky where that makes sense (as before) or /readonly where required.
3249 The /noupdate option is now undocumented but still supported for
3250 backwards compatibility. It is equivalent to /readonly except that in
3251 ACLs where /readonly is required you may specify /leaky/noupdate or
3252 /strict/noupdate which are treated the same as /readonly.
3254 A useful new feature is the /count= option. This is a generalization
3255 of the per_byte option, so that you can measure the throughput of other
3256 aggregate values. For example, the per_byte option is now equivalent
3257 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3259 The per_rcpt option has been generalized using the /count= mechanism
3260 (though it's more complicated than the per_byte equivalence). When it is
3261 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3262 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3263 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3264 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3265 Note that using per_rcpt with a non-readonly update mode in more than
3266 one ACL will cause the recipients to be double-counted. (The per_mail
3267 and per_byte options don't have this problem.)
3269 The handling of very low rates has changed slightly. If the computed rate
3270 is less than the event's count (usually one) then this event is the first
3271 after a long gap. In this case the rate is set to the same as this event's
3272 count, so that the first message of a spam run is counted properly.
3274 The major new feature is a mechanism for counting the rate of unique
3275 events. The new per_addr option counts the number of different
3276 recipients that someone has sent messages to in the last time period. It
3277 behaves like per_rcpt if all the recipient addresses are different, but
3278 duplicate recipient addresses do not increase the measured rate. Like
3279 the /count= option this is a general mechanism, so the per_addr option
3280 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3281 example, measure the rate that a client uses different sender addresses
3282 with the options per_mail/unique=$sender_address. There are further
3283 details in the main documentation.
3285 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3287 TF/06 Removed a few PCRE remnants.
3289 TF/07 Automatically extract Exim's version number from tags in the git
3290 repository when doing development or release builds.
3292 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3293 Bugzilla 879. Patch from Paul Fisher.
3295 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3296 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3299 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3301 PP/05 Variable $av_failed, true if the AV scanner deferred.
3302 Bugzilla 1078. Patch from John Horne.
3304 PP/06 Stop make process more reliably on build failure.
3305 Bugzilla 1087. Patch from Heiko Schlittermann.
3307 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3308 Bugzilla 1089. Patch from Heiko Schlittermann.
3310 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3311 Bugzilla 1131. Patch from Holger Weiß.
3313 PP/09 Handle IPv6 addresses with SPF.
3314 Bugzilla 860. Patch from Wolfgang Breyha.
3316 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3318 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3321 PP/11 match_* no longer expand right-hand-side by default.
3322 New compile-time build option, EXPAND_LISTMATCH_RHS.
3323 New expansion conditions, "inlist", "inlisti".
3325 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3327 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3329 PP/14 fix log_write() format string regression from TF/03.
3330 Bugzilla 1152. Patch from Dmitry Isaikin.
3336 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3338 PP/02 Harmonised TLS library version reporting; only show if debugging.
3339 Layout now matches that introduced for other libraries in 4.74 PP/03.
3341 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3343 PP/04 New "dns_use_edns0" global option.
3345 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3348 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3349 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3351 TK/01 Updated PolarSSL code to 0.14.2.
3352 Bugzilla 1097. Patch from Andreas Metzler.
3354 PP/07 Catch divide-by-zero in ${eval:...}.
3355 Fixes bugzilla 1102.
3357 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3360 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3361 format-string attack -- SECURITY: remote arbitrary code execution.
3363 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3364 time unintentionally subject to list matching rules, letting the header
3365 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3366 arbitrary string expansion). This allowed for information disclosure.
3368 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3369 INT_MIN/-1 -- value coerced to INT_MAX.
3375 NM/01 Workaround for PCRE version dependency in version reporting
3378 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3379 This fixes portability to compilers other than gcc, notably
3380 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3382 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3383 makefiles for portability to HP-UX and POSIX correctness.
3385 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3386 Also via indented variable definition in the Makefile.
3387 (Debugging by Oliver Heesakkers).
3389 PP/02 Restore caching of spamd results with expanded spamd_address.
3390 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3392 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3393 Improves build reliability. Fix from: Frank Elsner
3395 NM/02 Fix wide character breakage in the rfc2047 coding
3396 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3398 NM/03 Allow underscore in dnslist lookups
3399 Fixes bug 1026. Patch from Graeme Fowler
3401 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3402 Code patches from Adam Ciarcinski of NetBSD.
3404 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3407 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3408 is logged, to avoid truncation. Patch from John Horne.
3410 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3411 Patch from Jakob Hirsch.
3413 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3414 SQL string expansion failure details.
3415 Patch from Andrey Oktyabrski.
3417 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3418 Patch from Simon Arlott.
3420 PP/09 New lookups functionality failed to compile on old gcc which rejects
3421 extern declarations in function scope.
3422 Patch from Oliver Fleischmann
3424 PP/10 Use sig_atomic_t for flags set from signal handlers.
3425 Check getgroups() return and improve debugging.
3426 Fixed developed for diagnosis in bug 927 (which turned out to be
3429 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3430 Patch from Mark Zealey.
3432 PP/12 Bugzilla 1056: Improved spamd server selection.
3433 Patch from Mark Zealey.
3435 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3436 Based on patch from Heiko Schlittermann.
3438 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3439 Patch from Uwe Doering, sign-off by Michael Haardt.
3441 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3442 variable declaration deep within a block. Bug and patch from
3445 PP/15 lookups-Makefile IRIX compatibility coercion.
3447 PP/16 Make DISABLE_DKIM build knob functional.
3449 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3450 Patch by Simon Arlott
3452 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3453 variable argument macros. Our copy now differs from upstream.
3459 TF/01 Failure to get a lock on a hints database can have serious
3460 consequences so log it to the panic log.
3462 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3463 controlled using the smtp_confirmation log selector.
3465 TF/03 Include the error message when we fail to unlink a spool file.
3467 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3468 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3469 for maintaining out-of-tree patches for some time.
3471 PP/01 Bugzilla 139: Documentation and portability issues.
3472 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3473 Handle per-OS dynamic-module compilation flags.
3475 PP/02 Let /dev/null have normal permissions.
3476 The 4.73 fixes were a little too stringent and complained about the
3477 permissions on /dev/null. Exempt it from some checks.
3478 Reported by Andreas M. Kirchwitz.
3480 PP/03 Report version information for many libraries, including
3481 Exim version information for dynamically loaded libraries. Created
3482 version.h, now support a version extension string for distributors
3483 who patch heavily. Dynamic module ABI change.
3485 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3486 privilege escalation vulnerability whereby the Exim run-time user
3487 can cause root to append content of the attacker's choosing to
3490 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3493 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3494 If dropping privileges for untrusted macros, we disabled normal logging
3495 on the basis that it would fail; for the Exim run-time user, this is not
3496 the case, and it resulted in successful deliveries going unlogged.
3497 Fixed. Reported by Andreas Metzler.
3503 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3504 only prepend for the Resent-* case. Fixes regression introduced in
3505 Exim 4.70 by NM/22 for Bugzilla 607.
3507 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3508 increasing numbers of administrators be bitten by this.
3510 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3512 PP/03 Bugzilla 994: added openssl_options main configuration option.
3514 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3516 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3518 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3520 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3521 without a peer certificate, leading to a segfault because of an
3522 assumption that peers always have certificates. Be a little more
3523 paranoid. Problem reported by Martin Tscholak.
3525 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3526 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3527 NB: ClamAV planning to remove STREAM in "middle of 2010".
3528 CL also introduces -bmalware, various -d+acl logging additions and
3529 more caution in buffer sizes.
3531 PP/09 Implemented reverse_ip expansion operator.
3533 PP/10 Bugzilla 937: provide a "debug" ACL control.
3535 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3537 PP/12 Bugzilla 973: Implement --version.
3539 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3541 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3543 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3545 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3546 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3547 ignore trailing whitespace.
3549 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3551 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3554 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3555 Notification from Dr Andrew Aitchison.
3557 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3558 ExtendedDetectionInfo response format.
3559 Notification from John Horne.
3561 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3564 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3565 XSL and documented dependency on system catalogs, with examples of how
3568 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3571 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3572 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3573 configuration file which is writeable by the Exim user or group.
3575 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3576 of configuration files to cover files specified with the -C option if
3577 they are going to be used with root privileges, not just the default
3580 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3581 option (effectively making it always true).
3583 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3584 files to be used while preserving root privileges.
3586 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3587 that rogue child processes cannot use them.
3589 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3590 run-time user, instead of root.
3592 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3593 Exim run-time user without dropping privileges.
3595 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3596 result string, instead of calling string_vformat() twice with the same
3599 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3600 for other users. Others should always drop root privileges if they use
3601 -C on the command line, even for a whitelisted configure file.
3603 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3605 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3611 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3612 $data_path, and $header_path variables; fixed documentation bugs and
3615 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3616 exipick to access non-standard spools, including the "frozen" queue
3619 NM/01 Bugzilla 965: Support mysql stored procedures.
3620 Patch from Alain Williams
3622 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3624 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3625 Patch from Andreas Metzler
3627 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3628 Patch from Kirill Miazine
3630 NM/05 Bugzilla 671: Added umask to procmail example.
3632 JJ/03 installed exipick 20100323.0, fixing doc bug
3634 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3635 directory. Notification and patch from Dan Rosenberg.
3637 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3639 TK/02 Improve log output when DKIM signing operation fails.
3641 MH/01 Treat the transport option dkim_domain as a colon separated
3642 list, not as a single string, and sign the message with each element,
3643 omitting multiple occurences of the same signer.
3645 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3646 Bugzilla 985, 986. Patch by Simon Arlott
3648 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3649 Patch by Simon Arlott
3651 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3652 MBX locking. Notification from Dan Rosenberg.
3658 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3660 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3662 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3664 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3666 NM/04 Bugzilla 915: Flag broken perl installation during build.
3672 TK/01 Added patch by Johannes Berg that expands the main option
3673 "spamd_address" if it starts with a dollar sign.
3675 TK/02 Write list of recipients to X-Envelope-Sender header when building
3676 the mbox-format spool file for content scanning (suggested by Jakob
3679 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3680 (http://www.dcc-servers.net/) support via dccifd. Activated by
3681 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3683 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3684 by Mark Daniel Reidel <mr@df.eu>.
3686 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3687 When building exim an external PCRE library is now needed -
3688 PCRE is a system library on the majority of modern systems.
3689 See entry on PCRE_LIBS in EDITME file.
3691 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3692 conversation. Added nologin parameter to request.
3693 Patch contributed by Kirill Miazine.
3695 TF/01 Do not log submission mode rewrites if they do not change the address.
3697 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3699 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3700 log files in place. Contributed by Roberto Lima.
3702 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3704 TF/03 Bugzilla 615: When checking the local_parts router precondition
3705 after a local_part_suffix or local_part_prefix option, Exim now
3706 does not use the address's named list lookup cache, since this
3707 contains cached lookups for the whole local part.
3709 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3710 Robert Millan. Documentation is in experimental-spec.txt.
3712 TF/04 Bugzilla 668: Fix parallel build (make -j).
3714 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3716 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3717 Patch provided by Jan Srzednicki.
3719 TF/05 Leading white space used to be stripped from $spam_report which
3720 wrecked the formatting. Now it is preserved.
3722 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3723 that they are available at delivery time.
3725 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3727 TF/08 TLS error reporting now respects the incoming_interface and
3728 incoming_port log selectors.
3730 TF/09 Produce a more useful error message if an SMTP transport's hosts
3731 setting expands to an empty string.
3733 NM/06 Bugzilla 744: EXPN did not work under TLS.
3734 Patch provided by Phil Pennock.
3736 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3737 Patch provided by Richard Godbee.
3739 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3740 acl_smtp_notquit, added index entry.
3742 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3743 Patch provided by Eugene Bujak.
3745 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3746 accept(). Patch provided by Maxim Dounin.
3748 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3749 Patch provided by Phil Pennock.
3751 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3753 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3754 Patch provided by Brad "anomie" Jorsch.
3756 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3757 Patch provided by Dean Brooks.
3759 TK/05 Add native DKIM support (does not depend on external libraries).
3761 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3762 Patch provided by Graeme Fowler.
3764 NM/16 Bugzilla 851: Documentation example syntax fix.
3766 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3768 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3771 NM/19 Bugzilla 745: TLS version reporting.
3772 Patch provided by Phil Pennock.
3774 NM/20 Bugzilla 167: bool: condition support.
3775 Patch provided by Phil Pennock.
3777 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3778 clients. Patch provided by Phil Pennock.
3780 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3781 Patch provided by Brad "anomie" Jorsch.
3783 NM/23 Bugzilla 687: Fix misparses in eximstats.
3784 Patch provided by Heiko Schlittermann.
3786 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3787 Patch provided by Heiko Schlittermann.
3789 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3790 plus update to original patch.
3792 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3794 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3795 Patch provided by David Brownlee.
3797 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3799 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3801 NM/30 Bugzilla 888: TLS documentation bugfixes.
3803 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3805 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3806 Unlike the original bugzilla I have changed all shell scripts in src tree.
3808 NM/33 Bugzilla 898: Transport filter timeout fix.
3809 Patch by Todd Rinaldo.
3811 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3812 Patch by Serge Demonchaux.
3814 NM/35 Bugzilla 39: Base64 decode bug fixes.
3815 Patch by Jakob Hirsch.
3817 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3819 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3821 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3823 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3829 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3830 ALT-N's libdkim that I have put here:
3831 http://duncanthrax.net/exim-experimental/
3833 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3834 were called 'true' and it seems that C99 defines that as a reserved
3835 keyword to be used with 'bool' variable types. That means you could
3836 not include C99-style headers which use bools without triggering
3837 build errors in sieve.c.
3839 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3840 as mailq or other aliases. Changed the --help handling significantly
3841 to do whats expected. exim_usage() emits usage/help information.
3843 SC/01 Added the -bylocaldomain option to eximstats.
3845 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3847 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3849 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3855 PH/01 Another patch from the Sieve maintainer.
3857 PH/02 When an IPv6 address is converted to a string for single-key lookup
3858 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3859 dots are used instead of colons so that keys in lsearch files need not
3860 contain colons. This was done some time before quoting was made available
3861 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3862 (notated using the quote facility) so as to distinguish them from IPv4
3863 keys. This meant that lookups for IP addresses in host lists did not work
3864 for iplsearch lookups.
3866 This has been fixed by arranging for IPv6 addresses to be expressed with
3867 colons if the lookup type is iplsearch. This is not incompatible, because
3868 previously such lookups could never work.
3870 The situation is now rather anomalous, since one *can* have colons in
3871 ordinary lsearch keys. However, making the change in all cases is
3872 incompatible and would probably break a number of configurations.
3874 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3877 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3878 conversion specification without a maximum field width, thereby enabling
3879 a rogue spamd server to cause a buffer overflow. While nobody in their
3880 right mind would setup Exim to query an untrusted spamd server, an
3881 attacker that gains access to a server running spamd could potentially
3882 exploit this vulnerability to run arbitrary code as the Exim user.
3884 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3885 $primary_hostname instead of what libspf2 thinks the hosts name is.
3887 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3888 a directory entry by the name of the lookup key. Previously, if a
3889 symlink pointed to a non-existing file or a file in a directory that
3890 Exim lacked permissions to read, a lookup for a key matching that
3891 symlink would fail. Now it is enough that a matching directory entry
3892 exists, symlink or not. (Bugzilla 503.)
3894 PH/03 The body_linecount and body_zerocount variables are now exported in the
3897 PH/04 Added the $dnslist_matched variable.
3899 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3900 This means they are set thereafter only if the connection becomes
3903 PH/06 Added the client_condition to authenticators so that some can be skipped
3904 by clients under certain conditions.
3906 PH/07 The error message for a badly-placed control=no_multiline_responses left
3907 "_responses" off the end of the name.
3909 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3911 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3912 (without spaces) instead of just copying the configuration text.
3914 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3916 PH/11 Added $max_received_linelength.
3918 PH/12 Added +ignore_defer and +include_defer to host lists.
3920 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3921 way in which PCRE > 7.0 is built.
3923 PH/14 Implemented queue_only_load_latch.
3925 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3926 MAIL command. The effect was to mangle the value on 64-bit systems.
3928 PH/16 Another patch from the Sieve maintainer.
3930 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3932 PH/18 If a system quota error occurred while trying to create the file for
3933 a maildir delivery, the message "Mailbox is full" was not appended to the
3934 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3935 only to a quota excession during the actual writing of the file.
3937 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3938 characters?) which causes problems in log lines. The DN values are now
3939 passed through string_printing() before being added to log lines.
3941 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3942 and InterBase are left for another time.)
3944 PH/21 Added message_body_newlines option.
3946 PH/22 Guard against possible overflow in moan_check_errorcopy().
3948 PH/23 POSIX allows open() to be a macro; guard against that.
3950 PH/24 If the recipient of an error message contained an @ in the local part
3951 (suitably quoted, of course), incorrect values were put in $domain and
3952 $local_part during the evaluation of errors_copy.
3958 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3959 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3962 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3963 issue a MAIL command.
3965 PH/02 In an ACL statement such as
3967 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3969 if a client was not listed at all, or was listed with a value other than
3970 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3971 the condition was not true (as it should be), so access was not denied.
3972 The bug was that the ! inversion was incorrectly passed on to the second
3973 item. This has been fixed.
3975 PH/03 Added additional dnslists conditions == and =& which are different from
3976 = and & when the dns lookup returns more than one IP address.
3978 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3979 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3981 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3982 FSYNC, which compiles an option called disable_fsync that allows for
3983 bypassing fsync(). The documentation is heavily laced with warnings.
3985 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3987 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3988 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3989 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3990 including adding "make clean"; (3) Added -fPIC when compiling the test
3991 dynamically loaded module, to get rid of a warning.
3993 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3994 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3995 = 0s. The bug is otherwise harmless.
3997 PH/07 There was a bug in the dovecot authenticator such that the value of
3998 $auth1 could be overwritten, and so not correctly preserved, after a
3999 successful authentication. This usually meant that the value preserved by
4000 the server_setid option was incorrect.
4002 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
4004 PH/09 Installed PCRE release 7.0.
4006 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
4007 run for batched SMTP input. It is now run at the start of every message
4008 in the batch. While fixing this I discovered that the process information
4009 (output by running exiwhat) was not always getting set for -bs and -bS
4010 input. This is fixed, and it now also says "batched" for BSMTP.
4012 PH/11 Added control=no_pipelining.
4014 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4015 patch, slightly modified), and move the expansion of helo_data till after
4016 the connection is made in the smtp transport (so it can use these
4019 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4021 PH/14 Added log_selector = +pid.
4023 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4025 PH/16 Add ${if forany and ${if forall.
4027 PH/17 Added dsn_from option to vary the From: line in DSNs.
4029 PH/18 Flush SMTP output before performing a callout, unless control =
4030 no_callout_flush is set.
4032 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4033 was true (the default) a successful delivery failed to delete the retry
4034 item, thus causing premature timeout of the address. The bug is now
4037 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4039 PH/21 Long custom messages for fakedefer and fakereject are now split up
4040 into multiline responses in the same way that messages for "deny" and
4041 other ACL rejections are.
4043 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4044 with slight modification.
4046 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4047 draft, changing the syntax and factoring some duplicate code".
4049 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4050 for deliveries of the second and subsequent messages over the same SMTP
4053 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4054 ${reduce, with only minor "tidies".
4056 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4058 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4059 expansion side effects.
4061 PH/27 When a message times out after an over-quota error from an Exim-imposed
4062 quota, the bounce message says "mailbox is full". This message was not
4063 being given when it was a system quota that was exceeded. It now should
4066 MH/03 Made $recipients available in local_scan(). local_scan() already has
4067 better access to the recipient list through recipients_list[], but
4068 $recipients can be useful in postmaster-provided expansion strings.
4070 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4071 in the case of a MAIL command with additional options following the
4072 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4073 were accidentally chopped off.
4075 PH/29 SMTP synchronization checks are implemented when a command is read -
4076 there is a check that no more input is waiting when there shouldn't be
4077 any. However, for some commands, a delay in an ACL can mean that it is
4078 some time before the response is written. In this time, more input might
4079 arrive, invalidly. So now there are extra checks after an ACL has run for
4080 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4081 pipelining has not been advertised.
4083 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4085 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4086 returned in the SMTP response when smtp_return_error_details was false.
4087 This has been fixed.
4089 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4090 instead of the C I/O that was originally supplied, because problems were
4091 reported on Solaris.
4093 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4094 Exim which did not show up earlier: it was assuming that a call to
4095 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4096 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4097 was a macro that became an assignment, so it seemed to work. This has
4098 changed to a proper function call with a void return, hence the compile
4099 error. Exim's code has been fixed.
4101 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4104 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4106 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4108 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4109 because it turns out to be too big or there is a timeout) there is no
4110 "Completed" line in the log. When some messages of this type were
4111 selected by exigrep, they were listed as "not completed". Others were
4112 picked up by some special patterns. I have improved the selection
4113 criteria to be more general.
4115 PH/38 The host_find_failed option in the manualroute router can now be set
4116 to "ignore", to completely ignore a host whose IP address cannot be
4117 found. If all hosts are ignored, the behaviour is controlled by the new
4118 host_all_ignored option.
4120 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4121 homing or because of multiple MX records with /mx) generated more than
4122 one IP address, and the following item turned out to be the local host,
4123 all the secondary addresses of the first item were incorrectly removed
4124 from the list, along with the local host and any following hosts (which
4125 is what is supposed to happen).
4127 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4128 whoever called Exim into the -H file. In the case of the daemon it was
4129 behaving confusingly. When first started, it used values for whoever
4130 started the daemon, but after a SIGHUP it used the Exim user (because it
4131 calls itself on a restart). I have changed the code so that it now always
4134 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4135 message are rejected with the same error (e.g. no authentication or bad
4136 sender address), and a DATA command is nevertheless sent (as can happen
4137 with PIPELINING or a stupid MUA), the error message that was given to the
4138 RCPT commands is included in the rejection of the DATA command. This is
4139 intended to be helpful for MUAs that show only the final error to their
4142 PH/42 Another patch from the Sieve maintainer.
4144 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4145 Eximstats - Fixed some broken HTML links and added missing column headers
4147 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4148 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4150 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4152 PH/43 Yet another patch from the Sieve maintainer.
4154 PH/44 I found a way to check for a TCP/IP connection going away before sending
4155 the response to the final '.' that terminates a message, but only in the
4156 case where the client has not sent further data following the '.'
4157 (unfortunately, this is allowed). However, in many cases there won't be
4158 any further data because there won't be any more messages to send. A call
4159 to select() can be used: if it shows that the input is "ready", there is
4160 either input waiting, or the socket has been closed. An attempt to read
4161 the next input character can distinguish the two cases. Previously, Exim
4162 would have sent an OK response which the client would never have see.
4163 This could lead to message repetition. This fix should cure that, at
4164 least in a lot of common cases.
4166 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4167 advertised in response to EHLO.
4173 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4174 fixed by 4.65/MH/01 (is this a record?) are fixed:
4176 (i) An empty string was always treated as zero by the numeric comparison
4177 operators. This behaviour has been restored.
4179 (ii) It is documented that the numeric comparison operators always treat
4180 their arguments as decimal numbers. This was broken in that numbers
4181 starting with 0 were being interpreted as octal.
4183 While fixing these problems I realized that there was another issue that
4184 hadn't been noticed. Values of message_size_limit (both the global option
4185 and the transport option) were treated as octal if they started with 0.
4186 The documentation was vague. These values are now always treated as
4187 decimal, and I will make that clear in the documentation.
4193 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4194 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4197 MH/01 Don't check that the operands of numeric comparison operators are
4198 integers when their expansion is in "skipping" mode (fixes bug
4199 introduced by 4.64-PH/07).
4201 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4202 child addresses, Exim now panics and dies. Previously, because the count
4203 is held in a short int, deliveries were likely to be lost. As such a
4204 large number of recipients for a single message is ridiculous
4205 (performance will be very, very poor), I have chosen to impose a limit
4206 rather than extend the field.
4212 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4213 leftover -K file (the existence of which was triggered by #402).
4214 While we were at it, introduced process PID as part of the -K
4215 filename. This should rule out race conditions when creating
4218 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4219 processing considerably. Previous code took too long for large mails,
4220 triggering a timeout which in turn triggers #401.
4222 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4223 in the DK code in transports.c. sendfile() is not really portable,
4224 hence the _LINUX specificness.
4226 TF/01 In the add_headers option to the mail command in an Exim filter,
4227 there was a bug that Exim would claim a syntax error in any
4228 header after the first one which had an odd number of characters
4231 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4232 callout verification, Exim cached a "reject" for the entire domain. This
4233 is correct for most verifications, but it is not correct for a recipient
4234 verification with use_sender or use_postmaster set, because in that case
4235 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4236 case of MAIL FROM:<> rejection from other early rejections (e.g.
4237 rejection of HELO). When verifying a recipient using a non-null MAIL
4238 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4239 Whatever the result of the callout, the value of the domain cache is
4240 left unchanged (for any other kind of callout, getting as far as trying
4241 RCPT means that the domain itself is ok).
4243 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4246 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4247 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4248 session, the daemon ignores ECONNECT errors and logs others; it now
4249 ignores EPIPE as well.
4251 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4252 (quoted-printable decoding).
4254 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4255 later the small subsequent patch to fix an introduced bug.
4257 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4259 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4261 PH/08 An error is now given if message_size_limit is specified negative.
4263 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4264 to be given (somewhat) arbitrary names.
4266 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4269 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4270 miscellaneous code fixes
4272 PH/10 Added the log_reject_target ACL modifier to specify where to log
4275 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4276 hostname. This is wrong, because it relates to the incoming message (and
4277 probably the interface on which it is arriving) and not to the outgoing
4278 callout (which could be using a different interface). This has been
4279 changed to use the value of the helo_data option from the smtp transport
4280 instead - this is what is used when a message is actually being sent. If
4281 there is no remote transport (possible with a router that sets up host
4282 addresses), $smtp_active_hostname is used.
4284 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4285 tweaks were necessary in order to get it to work (see also 21 below):
4286 (a) The code assumed that strncpy() returns a negative number on buffer
4287 overflow, which isn't the case. Replaced with Exim's string_format()
4289 (b) There were several signed/unsigned issues. I just did the minimum
4290 hacking in of casts. There is scope for a larger refactoring.
4291 (c) The code used strcasecmp() which is not a standard C function.
4292 Replaced with Exim's strcmpic() function.
4293 (d) The code set only $1; it now sets $auth1 as well.
4294 (e) A simple test gave the error "authentication client didn't specify
4295 service in request". It would seem that Dovecot has changed its
4296 interface. Fortunately there's a specification; I followed it and
4297 changed what the client sends and it appears to be working now.
4299 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4302 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4303 address A is aliased to B and C, where B exists and C does not. Without
4304 -v the output is "A verified" because verification stops after a
4305 successful redirection if more than one address is generated. However,
4306 with -v the child addresses are also verified. Exim was outputting "A
4307 failed to verify" and then showing the successful verification for C,
4308 with its parentage. It now outputs "B failed to verify", showing B's
4309 parentage before showing the successful verification of C.
4311 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4312 look up a TXT record in a specific list after matching in a combined
4315 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4316 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4317 they consult the DNS. I had assumed they would set it the way they
4318 wanted; and indeed my experiments on Linux seem to show that in some
4319 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4320 To be on the safe side, however, I have now made the interface to
4321 host_find_byname() similar to host_find_bydns(), with an argument
4322 containing the DNS resolver options. The host_find_byname() function now
4323 sets these options at its start, just as host_find_bydns() does. The smtp
4324 transport options dns_qualify_single and dns_search_parents are passed to
4325 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4326 of host_find_byname() use the default settings of RES_DEFNAMES
4327 (qualify_single) but not RES_DNSRCH (search_parents).
4329 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4330 spool_read_header() do less string testing, by means of a preliminary
4331 switch on the second character of optional "-foo" lines. (This is
4332 overdue, caused by the large number of possibilities that now exist.
4333 Originally there were few.) While I was there, I also converted the
4334 str(n)cmp tests so they don't re-test the leading "-" and the first
4335 character, in the hope this might squeeze out yet more improvement.
4337 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4338 flag allowing group syntax was set by the header_syntax check but not
4339 turned off, possible causing trouble later; (2) The flag was not being
4340 set at all for the header_verify test, causing "group"-style headers to
4341 be rejected. I have now set it in this case, and also caused header_
4342 verify to ignore an empty address taken from a group. While doing this, I
4343 came across some other cases where the code for allowing group syntax
4344 while scanning a header line wasn't quite right (mostly, not resetting
4345 the flag correctly in the right place). These bugs could have caused
4346 trouble for malformed header lines. I hope it is now all correct.
4348 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4349 with the "reply" argument non-NULL. The code, however (which originally
4350 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4351 but it didn't always do it. This confused somebody who was copying the
4352 code for some other use. I have removed all the tests.
4354 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4355 feature that was used to support insecure browsers during the U.S. crypto
4356 embargo. It requires special client support, and Exim is probably the
4357 only MTA that supported it -- and would never use it because real RSA is
4358 always available. This code has been removed, because it had the bad
4359 effect of slowing Exim down by computing (never used) parameters for the
4360 RSA_EXPORT functionality.
4362 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4363 authenticator to fail if there's a tab character in the incoming data
4364 (there should never be unless someone is messing about, as it's supposed
4365 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4366 if the connection is using TLS or if the remote IP is the same as the
4367 local IP, and the "valid-client-cert option" if a client certificate has
4370 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4371 authenticators. This can be used for authorization after authentication
4372 succeeds. (In the case of plaintext, it servers for both authentication
4375 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4376 if any retry times were supplied.
4378 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4379 connection, where there is no client IP address to check. In this
4380 situation, the verify now always succeeds.
4382 PH/25 Applied John Jetmore's -Mset patch.
4384 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4386 PH/27 In a string expansion for a processed (not raw) header when multiple
4387 headers of the same name were present, leading whitespace was being
4388 removed from all of them, but trailing whitespace was being removed only
4389 from the last one. Now trailing whitespace is removed from each header
4390 before concatenation. Completely empty headers in a concatenation (as
4391 before) are ignored.
4393 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4394 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4396 PH/29 [Removed. This was a change that I later backed out, and forgot to
4397 correct the ChangeLog entry (that I had efficiently created) before
4398 committing the later change.]
4400 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4401 address errors (4xx response to RCPT) over the same connection as other
4402 messages routed to the same hosts. Such deliveries are always "forced",
4403 so retry times are not inspected. This resulted in far too many retries
4404 for the affected addresses. The effect occurred only when there were more
4405 hosts than the hosts_max_try setting in the smtp transport when it had
4406 the 4xx errors. Those hosts that it had tried were not added to the list
4407 of hosts for which the message was waiting, so if all were tried, there
4408 was no problem. Two fixes have been applied:
4410 (i) If there are any address or message errors in an SMTP delivery, none
4411 of the hosts (tried or untried) are now added to the list of hosts
4412 for which the message is waiting, so the message should not be a
4413 candidate for sending over the same connection that was used for a
4414 successful delivery of some other message. This seems entirely
4415 reasonable: after all the message is NOT "waiting for some host".
4416 This is so "obvious" that I'm not sure why it wasn't done
4417 previously. Hope I haven't missed anything, but it can't do any
4418 harm, as the worst effect is to miss an optimization.
4420 (ii) If, despite (i), such a delivery is accidentally attempted, the
4421 routing retry time is respected, so at least it doesn't keep
4422 hammering the server.
4424 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4425 in ${readsocket because some servers need this prod.
4427 PH/32 Added some extra debug output when updating a wait-xxx database.
4429 PH/33 The hint "could be header name not terminated by colon", which has been
4430 given for certain expansion errors for a long time, was not being given
4431 for the ${if def:h_colon_omitted{... case.
4433 PH/34 The spec says: "With one important exception, whenever a domain list is
4434 being scanned, $domain contains the subject domain." There was at least
4435 one case where this was not true.
4437 PH/35 The error "getsockname() failed: connection reset by peer" was being
4438 written to the panic log as well as the main log, but it isn't really
4439 panic-worthy as it just means the connection died rather early on. I have
4440 removed the panic log writing for the ECONNRESET error when getsockname()
4443 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4444 runs only) independently of the message's sender address. This meant
4445 that, if the 4xx error was in fact related to the sender, a different
4446 message to the same recipient with a different sender could confuse
4447 things. In particular, this can happen when sending to a greylisting
4448 server, but other circumstances could also provoke similar problems.
4449 I have changed the default so that the retry time for these errors is now
4450 based a combination of the sender and recipient addresses. This change
4451 can be overridden by setting address_retry_include_sender=false in the
4454 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4455 remote server are returned as part of bounce messages. This was not
4456 happening for LMTP over a pipe (the lmtp transport), but now it is the
4457 same for both kinds of LMTP.
4459 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4460 in header lines that were in fact CNAMEs. This is no longer the case.
4462 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4463 and queue runs started by the daemon processed all messages. This has
4464 been fixed so that -R and -S can now usefully be given with -q<time>.
4466 PH/40 Import PCRE release 6.7 (fixes some bugs).
4468 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4470 PH/42 Give an error if -q is specified more than once.
4472 PH/43 Renamed the variables $interface_address and $interface_port as
4473 $received_ip_address and $received_port, to make it clear that these
4474 values apply to message reception, and not to the outgoing interface when
4475 a message is delivered. (The old names remain recognized, of course.)
4477 PH/44 There was no timeout on the connect() call when using a Unix domain
4478 socket in the ${readsocket expansion. There now is.
4480 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4481 be meaningful with "accept".
4483 SC/01 Eximstats V1.43
4484 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4486 SC/02 Eximstats V1.44
4487 Use a glob alias rather than an array ref in the generated
4488 parser. This improves both readability and performance.
4490 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4491 Collect SpamAssassin and rejection statistics.
4492 Don't display local sender or destination tables unless
4493 there is data to show.
4494 Added average volumes into the top table text output.
4496 SC/04 Eximstats V1.46
4497 Collect data on the number of addresses (recipients)
4498 as well as the number of messages.
4500 SC/05 Eximstats V1.47
4501 Added 'Message too big' to the list of mail rejection
4502 reasons (thanks to Marco Gaiarin).
4504 SC/06 Eximstats V1.48
4505 Mainlog lines which have GMT offsets and are too short to
4506 have a flag are now skipped.
4508 SC/07 Eximstats V1.49 (Alain Williams)
4509 Added the -emptyok flag.
4511 SC/08 Eximstats V1.50
4512 Fixes for obtaining the IP address from reject messages.
4514 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4515 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4516 whitespace changes from 4.64-PH/27
4518 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4521 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4522 are found, allow negative numbers in numeric criteria)
4524 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4526 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4527 to match changes made in 4.64-PH/43
4529 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4531 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4532 "domain" is actually an IP address, and force a failure. This locks out
4533 those revolvers/nameservers that support "A-for-A" lookups, in
4534 contravention of the specifications.
4536 PH/48 When a host name was looked up from an IP address, and the subsequent
4537 forward lookup of the name timed out, the host name was left in
4538 $sender_host_name, contrary to the specification.
4540 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4541 restricted to single-key lookups, Exim was not diagnosing an error if
4542 * or *@ was used with a query-style lookup.
4544 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4546 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4547 long ago, but noone interested enough thought of it. Let's just say that
4548 the "1.1" means that there are some new functions that weren't there at
4549 some point in the past.
4551 PH/51 Error processing for expansion failure of helo_data from an smtp
4552 transport during callout processing was broken.
4554 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4555 tested/used via the -bh/-bhc/-bs options.
4557 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4558 bug, fixed in subsequent PCRE releases).
4560 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4561 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4563 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4569 SC/01 Use a glob alias rather than an array ref in eximstats generated
4570 parser. This improves both readability and performance.
4572 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4573 Don't display local sender or destination tables in eximstats unless
4574 there is data to show.
4575 Added average volumes into the eximstats top table text output.
4577 SC/03 Collect data on the number of addresses (recipients) as well
4578 as the number of messages in eximstats.
4580 TF/01 Correct an error in the documentation for the redirect router. Exim
4581 does (usually) call initgroups() when daemonizing.
4583 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4584 with consistent privilege compared to when running as a daemon.
4586 TF/03 Note in the spec that $authenticated_id is not set for local
4587 submissions from trusted users.
4589 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4590 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4592 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4593 by adding some example configuration directives to the default
4594 configuration file. A little bit of work is required to uncomment the
4595 directives and define how usernames and passwords are checked, but
4596 there is now a framework to start from.
4598 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4599 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4600 without this. I don't know how relevant this is to other LDAP libraries.
4602 PH/02 Add the verb name to the "unknown ACL verb" error.
4604 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4606 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4608 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4609 directory not expanded when it should be if an expanded home directory
4610 was set for the address (which is overridden by the transport).
4612 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4615 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4616 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4617 because it is too late at that time, and has no effect.
4619 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4620 security issue with \' (bugzilla #107). I could not use the
4621 PQescapeStringConn() function, because it needs a PGconn value as one of
4624 PH/08 When testing addresses using -bt, indicate those final addresses that
4625 are duplicates that would not cause an additional delivery. At least one
4626 person was confused, thinking that -bt output corresponded to deliveries.
4627 (Suppressing duplicates isn't a good idea as you lose the information
4628 about possibly different redirections that led to the duplicates.)
4630 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4631 systems where poll() doesn't work, in particular OS X.
4633 PH/10 Added more information to debugging output for retry time not reached.
4635 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4636 operations in malware.c.
4638 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4641 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4642 syslog_duplication set false, log lines that would normally be written
4643 both the the main log and to the reject log were not written to syslog at
4646 PH/14 In the default configuration, change the use of "message" in ACL warn
4647 statements to "add_header".
4649 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4650 not followed by a command (e.g. "seen endif").
4652 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4653 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4656 PH/17 Added extra conditions to the default value of delay_warning_condition
4660 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4661 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4662 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4665 The Auto-Submitted: and various List- headers are standardised, whereas I
4666 don't think Precedence: ever was.
4668 PH/18 Refactored debugging code in route_finduser() to show more information,
4669 in particular, the error code if getpwnam() issues one.
4671 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4672 This is apparently needed in addition to the PH/07 change above to avoid
4673 any possible encoding problems.
4675 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4676 but not after initializing Perl.
4678 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4679 output them only if debugging. By default they are written stderr,
4680 apparently, which is not desirable.
4682 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4685 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4688 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4690 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4691 authenticated or an ident call has been made. Suppress the default
4692 values for $authenticated_id and $authenticated_sender (but permit -oMai
4693 and -oMas) when testing with -bh.
4695 PH/24 Re-jigged the order of the tests in the default configuration so that the
4696 tests for valid domains and recipients precede the DNS black list and CSA
4697 tests, on the grounds that those ones are more expensive.
4699 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4700 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4701 This bug exists in every version of Exim that I still have, right back to
4704 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4705 However, an attempt to turn on case-sensitivity in a regex key by
4706 including (?-i) didn't work because the subject string was already
4707 lowercased, and the effects were non-intuitive. It turns out that a
4708 one-line patch can be used to allow (?-i) to work as expected.
4714 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4715 other effects) broke the use of negated acl sub-conditions.
4717 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4720 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4721 "Deny" causes Exim to reject the incoming connection with a 554 error.
4722 Unfortunately, if there is a major crisis, such as a disk failure,
4723 tcp-wrappers gives "deny", whereas what one would like would be some
4724 kind of temporary error. A kludge has been added to help with this.
4725 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4726 554 error is used if errno is still zero or contains ENOENT (which occurs
4727 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4730 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4732 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4733 errors. Otherwise a message that provokes a temporary error (when other
4734 messages do not) can cause a whole host to time out.
4736 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4737 addresses were routed directly to files or pipes from a redirect router.
4738 File deliveries just didn't batch; pipe deliveries might have suffered
4741 PH/06 A failure to get a lock for a hints database would erroneously always say
4742 "Failed to get write lock", even when it was really a read lock.
4744 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4745 of 0600. This has been changed to use the value of the lockfile_mode
4746 option (which defaults to 0600).
4748 PH/08 Applied small patch from the Sieve maintainer.
4750 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4751 folder from quota calculations, a direct delivery into this folder messed
4752 up the contents of the maildirsize file. This was because the regex was
4753 used only to exclude .Trash (or whatever) when the size of the mailbox
4754 was calculated. There was no check that a delivery was happening into an
4755 excluded directory. This bug has been fixed by ignoring all quota
4756 processing for deliveries into excluded directories.
4758 PH/10 Added the maildirfolder_create_regex option to appendfile.
4764 PH/01 The code for finding all the local interface addresses on a FreeBSD
4765 system running IPv6 was broken. This may well have applied to all BSD
4766 systems, as well as to others that have similar system calls. The broken
4767 code found IPv4 interfaces correctly, but gave incorrect values for the
4768 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4769 that it would not match correctly against @[] and not recognize the IPv6
4772 PH/02 The ipliteral router was not recognizing addresses of the form user@
4773 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4775 PH/03 Added disable_ipv6.
4777 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4778 decoded form, because it is most often used to construct To: headers
4779 lines in autoreplies, and the decoded form may well be syntactically
4780 invalid. However, $reply_address has leading white space removed, and all
4781 newlines turned into spaces so that the autoreply transport does not
4784 PH/05 If group was specified without a user on a router, and no group or user
4785 was specified on a transport, the group from the router was ignored.
4787 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4788 for visible compile-time settings that can be used to change these
4789 numbers, for those that want even more. Backwards compatibility with old
4790 spool files has been maintained. However, going back to a previous Exim
4791 release will lost any variables that are in spool files.
4793 PH/07 Two small changes when running in the test harness: increase delay when
4794 passing a TCP/IP connection to a new process, in case the original
4795 process has to generate a bounce, and remove special handling of
4796 127.0.0.2 (sic), which is no longer necessary.
4798 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4799 be the same on different OS.
4801 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4804 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4805 whether --show-vars was specified or not
4807 JJ/02 exipick: Added support for new ACL variable spool format introduced
4810 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4811 syntactically invalid From: or Reply-to: line, and a filter used this to
4812 generate an autoreply, and therefore failed to obtain an address for the
4813 autoreply, Exim could try to deliver to a non-existent relative file
4814 name, causing unrelated and misleading errors. What now happens is that
4815 it logs this as a hard delivery error, but does not attempt to create a
4818 PH/11 The exinext utility has a -C option for testing purposes, but although
4819 the given file was scanned by exinext itself; it wasn't being passed on
4820 when Exim was called.
4822 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4823 an end-of-file indication when reading a command response.
4825 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4826 compiled. In many other places in Exim, IPv6 addresses are always
4827 recognized, so I have changed this. It also means that IPv4 domain
4828 literals of the form [IPV4:n.n.n.n] are now always recognized.
4830 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4831 used if the router is not running as root, for example, when verifying at
4832 ACL time, or when using -bh. The debugging output from this situation was
4833 non-existent - all you got was a failure to exec. I have made two
4836 (a) Failures to set uid/gid, the current directory, or a process leader
4837 in a subprocess such as that created by queryprogram now generate
4838 suitable debugging output when -d is set.
4840 (b) The queryprogram router detects when it is not running as root,
4841 outputs suitable debugging information if -d is set, and then runs
4842 the subprocess without attempting to change uid/gid.
4844 PH/15 Minor change to Makefile for building test_host (undocumented testing
4847 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4848 additional section of a DNS packet that returns MX or SRV records.
4849 Instead, it always explicitly searches for A/AAAA records. This avoids
4850 major problems that occur when a DNS server includes only records of one
4851 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4852 fixed another bug: if SRV records were looked up and the corresponding
4853 address records were *not* found in the additional section, the port
4854 values from the SRV records were lost.
4856 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4857 using the correct key (the original address) when searching the retry
4858 rules in order to find which one to use for generating the retry hint.
4860 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4861 adding the default one. Similarly, if it contains a Reply-To: header, the
4862 errors_reply_to option, if set, is not used.
4864 PH/19 When calculating a retry time, Exim used to measure the "time since
4865 failure" by looking at the "first failed" field in the retry record. Now
4866 it does not use this if it is later than than the arrival time of the
4867 message. Instead it uses the arrival time. This makes for better
4868 behaviour in cases where some deliveries succeed, thus re-setting the
4869 "first failed" field. An example is a quota failure for a huge message
4870 when small messages continue to be delivered. Without this change, the
4871 "time since failure" will always be short, possible causing more frequent
4872 delivery attempts for the huge message than are intended.
4873 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4875 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4876 $1, $2, $3) because the numerical variables can be reset during some
4877 expansion items (e.g. "match"), thereby losing the authentication data.
4879 PH/21 Make -bV show the size of off_t variables so that the test suite can
4880 decide whether to run tests for quotas > 2G.
4882 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4883 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4884 filecount value is greater than 2G or if a quota value is greater than 2G
4885 on a system where the size of off_t is not greater than 4, a panic error
4888 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4889 never match. The debug and -bh output now contains an explicit error
4890 message indicating a malformed IPv4 address or mask.
4892 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4893 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4894 PH/23 above applies.
4896 PH/25 Do not write to syslog when running in the test harness. The only
4897 occasion when this arises is a failure to open the main or panic logs
4898 (for which there is an explicit test).
4900 PH/26 Added the /no_tell option to "control=freeze".
4902 PH/27 If a host name lookup failed very early in a connection, for example, if
4903 the IP address matched host_lookup and the reverse lookup yielded a name
4904 that did not have a forward lookup, an error message of the form "no IP
4905 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4906 could be logged. Now it outputs the IP address instead of "NULL".
4908 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4909 allows the sender and the authenticated sender to be set when
4910 submitting a message from within Exim. Since child_open_exim() is
4911 documented for local_scan(), the new function should be too.
4913 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4914 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4915 results in an empty string is now treated as unset.
4917 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4919 PH/31 Added sender_verify_fail logging option.
4921 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4922 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4923 tidied the source and removed it altogether.
4925 PH/33 When a queue run was abandoned because the load average was too high, a
4926 log line was always written; now it is written only if the queue_run log
4927 selector is set. In addition, the log line for abandonment now contains
4928 information about the queue run such as the pid. This is always present
4929 in "start" and "stop" lines but was omitted from the "abandon" line.
4931 PH/34 Omit spaces between a header name and the colon in the error message that
4932 is given when verify = headers_syntax fails (if there are lots of them,
4933 the message gets confusing).
4935 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4936 names, as there are now some PTR records that contain slashes. This check
4937 is only to protect against broken name servers that fall over on strange
4938 characters, so the fact that it applies to all lookups doesn't matter.
4940 PH/36 Now that the new test suite is complete, we can remove some of the
4941 special code in Exim that was needed for the old test suite. For example,
4942 sorting DNS records because real resolvers return them in an arbitrary
4943 order. The new test suite's fake resolver always returns records in the
4946 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4947 bounces) except when queue_only is set, to avoid logging races between
4948 the different processes.
4950 PH/38 Panic-die if .include specifies a non-absolute path.
4952 PH/39 A tweak to the "H" retry rule from its user.
4954 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4955 a label. They prevented compilation on older perls.
4957 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4958 a warning to be raised on newish perls.
4960 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4961 on queue. Changes to match documented behaviour of showing count of
4962 messages matching specified criteria.
4964 PH/40 Changed the default ident timeout from 30s to 5s.
4966 PH/41 Added support for the use of login_cap features, on those BSD systems
4967 that have them, for controlling the resources used by pipe deliveries.
4969 PH/42 The content-scanning code uses fopen() to create files in which to put
4970 message data. Previously it was not paying any attention to the mode of
4971 the files. Exim runs with umask(0) because the rest of the code creates
4972 files with open(), and sets the required mode explicitly. Thus, these
4973 files were ending up world-writeable. This was not a big issue, because,
4974 being within the spool directory, they were not world-accessible. I have
4975 created a function called modefopen, which takes an additional mode
4976 argument. It sets umask(777), creates the file, chmods it to the required
4977 mode, then resets the umask. All the relevant calls to fopen() in the
4978 content scanning code have been changed to use this function.
4980 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4981 to 24 hours. This avoids potential overflow problems when processing G
4982 and H retry rules. I suspect nobody ever tinkers with this value.
4984 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4986 PH/45 When the plaintext authenticator is running as a client, the server's
4987 challenges are checked to ensure they are valid base64 strings. By
4988 default, the authentication attempt is cancelled if an invalid string is
4989 received. Setting client_ignore_invalid_base64 true ignores these errors.
4990 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4991 they are received. Thus, the responses can be made to depend on the
4992 challenges. If an invalid string is ignored, an empty string is placed in
4995 PH/46 Messages that are created by the autoreply transport now contains a
4996 References: header, in accordance with RFCs 2822 and 3834.
4998 PH/47 Added authenticated_sender_force to the smtp transport.
5000 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
5002 PH/49 Installed latest patch from the Sieve maintainer.
5004 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
5005 was also set, the appendfile transport was unnecessarily scanning a
5006 directory of message files (e.g. for maildir delivery) to find the count
5007 of files (along with the size), even though it did not need this
5008 information. It now does the scan only if it needs to find either the
5009 size of the count of files.
5011 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5013 PH/52 Two bugs concerned with error handling when the smtp transport is
5016 (i) Exim was not creating retry information for temporary errors given
5017 for individual recipients after the DATA command when the smtp transport
5018 was used in LMTP mode. This meant that they could be retried too
5019 frequently, and not timed out correctly.
5021 (ii) Exim was setting the flag that allows error details to be returned
5022 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5023 recipients that were returned after the DATA command.
5025 PH/53 This is related to PH/52, but is more general: for any failing address,
5026 when detailed error information was permitted to be returned to the
5027 sender, but the error was temporary, then after the final timeout, only
5028 "retry timeout exceeded" was returned. Now it returns the full error as
5029 well as "retry timeout exceeded".
5031 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5032 do this, and (what is worse) MTAs that accept it.
5034 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5035 will now be deprecated.
5037 PH/56 New os.c-cygwin from the Cygwin maintainer.
5039 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5040 formats (previously only available in exim formats via -bpr, -bpru,
5041 and -bpra. Now also available in native and exiqgrep formats)
5043 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5044 with very large, slow to parse queues
5046 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5048 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5050 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5051 responses to authentication challenges, though it was showing the
5052 challenges; (ii) I've removed the CR characters from the debug output for
5055 PH/58 Allow for the insertion of a newline as well as a space when a string
5056 is turned into more than one encoded-word during RFC 2047 encoding. The
5057 Sieve code now uses this.
5059 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5060 data_4xx, lost_connection, tls_required.
5062 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5063 message was being sent as an SMTP response.
5065 PH/61 Add -l and -k options to exicyclog.
5067 PH/62 When verifying, if an address was redirected to one new address, so that
5068 verification continued, and the new address failed or deferred after
5069 having set something in $address_data, the value of $address_data was not
5070 passed back to the ACL. This was different to the case when no
5071 redirection occurred. The value is now passed back in both cases.
5073 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5074 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5075 use login_cap.h, so on its own it isn't the distinguishing feature. The
5076 new name refers directly to the setclassresources() function.
5078 PH/65 Added configuration files for NetBSD3.
5080 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5082 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5083 is preferred over IPv4.
5085 PH/68 The bounce_return_message and bounce_return_body options were not being
5086 honoured for bounces generated during the reception of non-SMTP messages.
5087 In particular, this applied to messages rejected by the ACL. This bug has
5088 been fixed. However, if bounce_return_message is true and bounce_return_
5089 body is false, the headers that are returned for a non-SMTP message
5090 include only those that have been read before the error was detected.
5091 (In the case of an ACL rejection, they have all been read.)
5093 PH/69 The HTML version of the specification is now built in a directory called
5094 spec_html instead of spec.html, because the latter looks like a path with
5095 a MIME-type, and this confuses some software.
5097 PH/70 Catch two compiler warnings in sieve.c.
5099 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5100 function verify_get_ident() calls ip_connect() to connect a socket, but
5101 if the "connect()" function timed out, ip_connect() used to close the
5102 socket. However, verify_get_ident() also closes the socket later, and in
5103 between Exim writes to the log, which may get opened at this point. When
5104 the socket was closed in ip_connect(), the log could get the same file
5105 descriptor number as the socket. This naturally causes chaos. The fix is
5106 not to close the socket in ip_connect(); the socket should be closed by
5107 the function that creates it. There was only one place in the code where
5108 this was missing, in the iplookup router, which I don't think anybody now
5109 uses, but I've fixed it anyway.
5111 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5112 well as to direct DNS lookups. Otherwise the handling of names in host
5113 lists is inconsistent and therefore confusing.
5119 PH/01 Two changes to the default runtime configuration:
5121 (1) Move the checks for relay_from_hosts and authenticated clients from
5122 after to before the (commented out) DNS black list checks.
5124 (2) Add control=submission to the relay_from_hosts and authenticated
5125 clients checks, on the grounds that messages accepted by these
5126 statements are most likely to be submissions.
5128 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5130 (1) Generate an error if the third argument for the ${prvs expansion is
5133 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5136 (3) Reset the variables that are obtained from the first argument of
5137 ${prvscheck and used in the second argument before leaving the code,
5138 because their memory is reclaimed, so using them afterwards may do
5141 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5142 one (it's much easier than Tom thought :-).
5144 (5) Because of (4), we can now allow for the use of $prvscheck_result
5145 inside the third argument.
5147 PH/03 For some reason, the default setting of PATH when running a command from
5148 a pipe transport was just "/usr/bin". I have changed it to
5151 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5152 anything to be listed in the output from -bV.
5154 PH/05 When a filter generated an autoreply, the entire To: header line was
5155 quoted in the delivery log line, like this:
5157 => >A.N.Other <ano@some.domain> <original@ddress> ...
5159 This has been changed so that it extracts the operative address. There
5160 may be more than one such address. If so, they are comma-separated, like
5163 => >ano@some.domain,ona@other.domain <original@ddress> ...
5165 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5166 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5167 not being looked up in the rDNS to get a host name, Exim was showing the
5168 IP address twice in Received: lines, even though the IP addresses were
5169 identical. For example:
5171 Received: from [1.2.3.4] (helo=[1.2.3.4])
5173 However, if the real host name was known, it was omitting the HELO data
5174 if it matched the actual IP address. This has been tidied up so that it
5175 doesn't show the same IP address twice.
5177 PH/07 When both +timestamp and +memory debugging was on, the value given by
5178 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5179 called by the debug printing, thereby overwriting the timestamp buffer.
5180 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5182 PH/08 When the original message was included in an autoreply transport, it
5183 always said "this is a copy of the message, including all the headers",
5184 even if body_only or headers_only was set. It now gives an appropriate
5187 PH/09 Applied a patch from the Sieve maintainer which:
5189 o fixes some comments
5190 o adds the (disabled) notify extension core
5191 o adds some debug output for the result of if/elsif tests
5192 o points to the current vacation draft in the documentation
5193 and documents the missing references header update
5197 o fixes a bug in processing the envelope test (when testing
5198 multiple envelope elements, the last element determined the
5201 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5202 Electronic Mail") by including:
5204 Auto-submitted: auto-generated
5206 in the messages that it generates (bounce messages and others, such as
5207 warnings). In the case of bounce messages for non-SMTP messages, there was
5208 also a typo: it was using "Auto_submitted" (underscore instead of
5209 hyphen). Since every message generated by Exim is necessarily in response
5210 to another message, thes have all been changed to:
5212 Auto-Submitted: auto-replied
5214 in accordance with these statements in the RFC:
5216 The auto-replied keyword:
5218 - SHOULD be used on messages sent in direct response to another
5219 message by an automatic process,
5221 - MUST NOT be used on manually-generated messages,
5223 - MAY be used on Delivery Status Notifications (DSNs) and Message
5224 Disposition Notifications (MDNs),
5226 - MUST NOT be used on messages generated by automatic or periodic
5227 processes, except for messages which are automatic responses to
5230 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5231 to the default Received: header definition.
5233 PH/12 Added log selector acl_warn_skipped (default on).
5235 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5236 variables because (a) they are in the wrong storage pool and (b) even if
5237 they were copied, it wouldn't work properly because of the caching.
5239 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5240 checking when decoding. Apparently there are clients that generate
5241 overlong encoded strings. Why am I not surprised?
5243 PH/15 If the first argument of "${if match_address" was not empty, but did not
5244 contain an "@" character, Exim crashed. Now it writes a panic log message
5245 and treats the condition as false.
5247 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5249 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5250 extension "envelope-auth". The code is finished and in agreement with
5251 other implementations, but there is no documentation so far and in fact,
5252 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5253 not changing the active code.
5255 Print executed "if" and "elsif" statements when debugging is used. This
5256 helps a great deal to understand what a filter does.
5258 Document more things not specified clearly in RFC3028. I had all this
5259 sorted out, when out of a sudden new issues came to my mind. Oops."
5261 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5264 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5265 canonical form (as documented). However, after a host name lookup from
5266 the IP address, check_host() was doing a simple string comparison with
5267 addresses acquired from the DNS when checking that the found name did
5268 have the original IP as one of its addresses. Since any found IPv6
5269 addresses are likely to be in abbreviated form, the comparison could
5270 fail. Luckily, there already exists a function for doing the comparison
5271 by converting both addresses to binary, so now that is used instead of
5272 the text comparison.
5274 PH/20 There was another similar case to PH/19, when a complete host name was
5275 given in a host list; looking up its IP address could give an abbreviated
5276 form, whereas the current host's name might or might not be abbreviated.
5277 The same fix has been applied.
5283 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5284 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5287 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5288 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5290 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5292 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5293 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5294 Also, for "Auto-Submitted", treat anything other than "no" as
5295 non-personal, in accordance with RFC 3834. (Previously it treated
5296 anything starting "auto-" as non-personal.)
5298 TF/01 The control=submission/name=... option had a problem with syntax
5299 errors if the name included a slash character. The /name= option
5300 now slurps the rest of the string, so it can include any characters
5301 but it must come last in the list of options (after /sender_retain
5304 PH/05 Some modifications to the interface to the fake nameserver for the new
5312 TK/01 Added the "success_on_redirect" address verification option. See
5313 NewStuff for rationale and an example.
5315 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5317 PH/02 Patch to exigrep to allow it to work on syslog lines.
5319 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5320 fread() to skip over the body file's header line, because in Cygwin the
5321 header line is locked and is inaccessible.
5323 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5324 co-exist for some time) to make it clear that it is the Exim ID that is
5325 referenced, not the Message-ID: header line.
5327 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5328 string_format() function, because snprintf() does not exist on all
5331 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5332 ${stat: expansion item.
5334 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5335 protocol synchronization error", to keep the pedants happy.
5337 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5338 well as for IRIX systems, when gcc is being used. See the host.c source
5341 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5343 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5346 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5347 transport and to the smtp transport in LMTP mode.
5349 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5351 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5352 run a filter in a subprocess. This could lead to confusion in subsequent
5353 lookups in the parent process. There should also be a search_tidyup() at
5354 the end of the subprocess.
5356 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5357 only if the host matched helo_try_verify_hosts, which caused the
5358 verification to occur when the EHLO/HELO command was issued. The ACL just
5359 tested the remembered result. Now, if a previous verification attempt has
5360 not happened, "verify = helo" does it there and then.
5362 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5364 TK/03 Fix log output including CR from clamd.
5366 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5367 exist provoked a memory error which could cause a segfault.
5369 PH/15 Installed PCRE 6.2
5371 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5373 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5374 of the problem. Specifically, suggested +O2 rather than +O1 for the
5377 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5379 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5380 record, the port was not correctly logged when the outgoing_port log
5381 selector was set (it logged the transort's default port).
5383 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5384 fallback_hosts, and "hosts" in the smtp transport.
5386 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5387 host errors such as "Connection refused".
5389 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5390 authentication with radiusclient 0.4.9:
5392 - Error returned from rc_read_config was caught wrongly
5393 - Username/password not passed on to radius server due to wrong length.
5395 The presumption is that some radiusclient API changes for 4.51/PH/17
5396 were not taken care of correctly. The code is still untested by me (my
5397 Linux distribution still has 0.3.2 of radiusclient), but it was
5398 contributed by a Radius user.
5400 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5401 expanding the "port" option of the smtp transport.
5403 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5404 while reading a MIME header. Thanks to Tom Hughes for a patch.
5406 PH/24 Include config.h inside local_scan.h so that configuration settings are
5409 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5410 that in an ACL for RCPT (for example), you can examine exactly what was
5413 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5414 commands, but it was not correctly comparing the address with the actual
5415 client host address. Thus, it would show the EHLO address in Received:
5416 header lines when this was not necessary.
5418 PH/27 Added the % operator to ${eval:}.
5420 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5421 it should be ignoring failures (because with -C, for example, it has lost
5422 privilege). It wasn't ignoring creation failures other than "already
5425 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5428 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5429 because an input line was too long, either on its own, or by virtue of
5430 too many continuations, the temporary file was not being removed, and the
5431 return code was incorrect.
5433 PH/31 Missing "BOOL" in function definition in filtertest.c.
5435 PH/32 Applied Sieve patches from the maintainer.
5437 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5439 PH/33 Added "verify = not_blind".
5441 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5442 Local/Makefile (with some defaults set). These are used in built scripts
5443 such as exicyclog, but they have never been used in the exim_install
5444 script (though there are many overriding facilities there). I have
5445 arranged that the exim_install script now takes note of these two
5448 PH/35 Installed configuration files for Dragonfly.
5450 PH/36 When a locally submitted message by a trusted user did not contain a
5451 From: header, and the sender address was obtained from -f or from an SMTP
5452 MAIL command, and the trusted user did not use -F to supply a sender
5453 name, $originator_name was incorrectly used when constructing a From:
5454 header. Furthermore, $originator_name was used for submission mode
5455 messages from external hosts without From: headers in a similar way,
5456 which is clearly wrong.
5458 PH/37 Added control=suppress_local_fixups.
5460 PH/38 When log_selector = +received_sender was set, and the addition of the
5461 sender made the log line's construction buffer exactly full, or one byte
5462 less than full, an overflow happened when the terminating "\n" was
5465 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5466 when the result of a list match is failure because a DNS lookup failed.
5468 PH/40 RM_COMMAND is now used in the building process.
5470 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5471 the "build-* directories that it finds.
5473 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5474 address in a domain literal was a prefix of an interface address.
5476 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5477 when verifying a sender address, unless rewrite_headers is false.
5479 PH/44 Wrote a long comment about why errors_to addresses are verified as
5480 recipients, not senders.
5482 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5483 the ratelimit ACL was added.
5485 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5487 PH/46 Added extra information about PostgreSQL errors to the error string.
5489 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5490 avoiding the need to install special zones in a real server. This is
5491 backwards compatible; if it can't find the fake resolver, it drops back.
5492 Thus, both old and new test suites can be run.
5494 TF/02 Added util/ratelimit.pl
5496 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5497 clock is set back in time.
5499 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5500 Candler <B.Candler@pobox.com>.
5502 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5503 OK for addresses that are the result of redirections.
5505 PH/48 A number of further additions for the benefit of the new test suite,
5506 including a fake gethostbyname() that interfaces to the fake DNS resolver
5509 TF/06 The fix for widen_domains has also been applied to qualify_single and
5510 search_parents which are the other dnslookup options that can cause
5513 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5516 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5518 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5519 service" if it encountered an MX record with an empty target hostname.
5520 The message is now "an MX or SRV record indicated no SMTP service".
5522 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5523 if the DNS of the sending site is misconfigured. This is quite a
5524 common situation. This change restores the behaviour of treating a
5525 helo verification defer as a failure.
5527 PH/51 If self=fail was set on a router, the bounce message did not include the
5528 actual error message.
5534 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5536 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5537 command itself ended in error, the underlying message about the transport
5538 filter timeout was being overwritten with the pipe command error. Now the
5539 underlying error message should be appended to the second error message.
5541 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5543 PH/02 Reduce the amount of output that "make" produces by default. Full output
5544 can still be requested.
5546 PH/03 The warning log line about a condition test deferring for a "warn" verb
5547 was being output only once per connection, rather than after each
5548 occurrence (because it was using the same function as for successful
5549 "warn" verbs). This seems wrong, so I have changed it.
5551 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5552 it should not have, which might have caused a crash in the right
5553 circumstances, but probably never did.
5555 PH/04 Installed a modified version of Tony Finch's patch to make submission
5556 mode fix the return path as well as the Sender: header line, and to
5557 add a /name= option so that you can make the user's friendly name appear
5560 TF/03 Added the control = fakedefer ACL modifier.
5562 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5563 Mark Lowes for thorough testing.
5565 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5567 TK/03 Merged latest SRS patch from Miles Wilton.
5569 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5570 with the definition in sysexits.h (which is #included earlier).
5571 Fortunately, Exim does not actually use EX_OK. The code used to try to
5572 preserve the sysexits.h value, by assuming that macro definitions were
5573 scanned for macro replacements. I have been disabused of this notion,
5574 so now the code just undefines EX_OK before #including unistd.h.
5576 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5577 in the smtp transport. When a block could not be written in a single
5578 write() function, the timeout was being re-applied to each part-write.
5579 This seems wrong - if the receiver was accepting one byte at a time it
5580 would take for ever. The timeout is now adjusted when this happens. It
5581 doesn't have to be particularly precise.
5583 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5584 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5586 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5587 without a domain if the check to <postmaster@domain> fails.
5589 SC/01 Eximstats: added -xls and the ability to specify output files
5590 (patch written by Frank Heydlauf).
5592 SC/02 Eximstats: use FileHandles for outputting results.
5594 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5596 SC/04 Eximstats: fixed display of large numbers with -nvr option
5598 SC/05 Eximstats: fixed merging of reports with empty tables.
5600 SC/06 Eximstats: added the -include_original_destination flag
5602 SC/07 Eximstats: removed tabs and trailing whitespace.
5604 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5606 TK/06 MBOX spool code: Add real "From " MBOX separator line
5607 so the .eml file is really in mbox format (even though
5608 most programs do not really care). Patch from Alex Miller.
5610 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5611 The latter is generated from $received_to and is only set if the
5612 message has one envelope recipient. SA can use these headers,
5613 obviously out-of-the-box. Patch from Alex Miller.
5615 PH/08 The ${def test on a variable was returning false if the variable's
5616 value was "0", contrary to what the specification has always said!
5617 The result should be true unless the variable is empty.
5619 PH/09 The syntax error of a character other than { following "${if
5620 def:variable_name" (after optional whitespace) was not being diagnosed.
5621 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5622 accidental colon was present, for example, could give incorrect results.
5624 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5625 result is used (not including appendfile, where other changes are about
5628 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5629 This involved changing a lot of size variables from int to off_t. It
5630 should work with maildirs and everything.
5632 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5633 spamd dying while we are connected to it.
5635 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5638 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5639 function for BDB 4.3.
5641 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5643 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5644 the sources for PCRE have been re-arranged and more files are now
5647 PH/15 The code I had for printing potentially long long variables in PH/11
5648 above was not the best (it lost precision). The length of off_t variables
5649 is now inspected at build time, and an appropriate printing format (%ld
5650 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5651 to be "long long int" or "long int". This is needed for the internal
5652 formatting function string_vformat().
5654 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5655 the configuration file to be ":syslog", then the script "guesses" where
5656 the logs files are, rather than using the compiled in default. In our
5657 case the guess is not the same as the compiled default, so the script
5658 suddenly stopped working when I started to use syslog. The patch checks
5659 to see if log_file_path is "". If so, it attempts to read it from exim
5660 with no configuration file to get the compiled in version, before it
5661 falls back to the previous guessing code."
5663 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5664 implementing BATV in an Exim configuration. See NewStuff for the gory
5667 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5668 Makefile that are specific to HP-UX.
5670 PH/18 If the "use_postmaster" option was set for a recipient callout together
5671 with the "random" option, the postmaster address was used as the MAIL
5672 FROM address for the random test, but not for the subsequent recipient
5673 test. It is now used for both.
5675 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5676 patch removes a few documentation additions to RFC 3028, because the
5677 latest draft now contains them. It adds the new en;ascii-case comparator
5678 and a new error check for 8bit text in MIME parts. Comparator and
5679 require names are now matched exactly. I enabled the subaddress
5680 extension, but it is not well tested yet (read: it works for me)."
5682 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5683 rework some of the code of TK/09 above to avoid the hardwired use of
5684 "%lld" and "long long". Replaced the call to snprintf() with a call to
5687 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5688 records point to non-existent hosts", "retry timeout exceeded", and
5689 "retry time not reached for any host after a long failure period".
5691 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5692 experimental DomainKeys support:
5694 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5695 (2) On an error such as an illegally used "control", the wrong name for
5696 the control was given.
5698 These problems did NOT occur unless DomainKeys support was compiled.
5700 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5702 PH/24 Added ${if match_ip condition.
5704 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5705 databases so that it will be absolutely obvious if a crash occurs in the
5706 DB library. This is a regular occurrence (often caused by mis-matched
5709 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5710 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5711 picked up on a user's system that detects such things. There doesn't seem
5712 to be a gcc warning option for this - only an attribute that has to be
5713 put on the function's prototype. It seems that in Fedora Core 4 they have
5714 set this on a number of new functions. No doubt there will be more in due
5717 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5718 specify a transport. However, if an address that was verified by such a
5719 router was the subject of a callout, Exim crashed because it tried to
5720 read the rcpt_include_affixes from the non-existent transport. Now it
5721 just assumes that the setting of that option is false. This bug was
5722 introduced by 4.51/PH/31.
5724 PH/28 Changed -d+all to exclude +memory, because that information is very
5725 rarely of interest, but it makes the output a lot bigger. People tend to
5726 do -d+all out of habit.
5728 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5729 code in os-type was giving problems when libc.so lives in lib64, like on
5732 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5733 aren't the modern standard, and it seems that some systems' include files
5734 don't always have them. Exim was already checking for some of the newer
5735 ones like T_AAAA, and defining it itself. I've added checks for all the
5736 record types that Exim uses.
5738 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5739 not automatically generating a new one, as it is supposed to. This
5740 prevented TLS from working. If the file did exist, but contained invalid
5741 data, a new version was generated, as expected. It was only the case of a
5742 non-existent file that was broken.
5744 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5745 with a change in libdomainkeys > 0.64.
5747 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5748 from DNS. If the selector record carries the flag, it now has
5749 precedence over the domain-wide flag.
5751 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5753 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5754 the use of a port name that isn't defined in /etc/services) occurred, the
5755 message was deferred as in a normal delivery, and thus remained on the
5756 spool, instead of being failed because of the mua_wrapper setting. This
5757 is now fixed, and I tidied up some of the mua_wrapper messages at the
5760 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5761 the messages in a hash of arrays rather than using individual hashes.
5762 This is a bit cleaner and results in dramatic memory savings, albeit
5763 at a slight CPU cost.
5765 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5766 as requested by Marc Sherman.
5768 SC/10 Eximstats: added histograms for user specified patterns as requested
5771 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5773 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5774 fopen() in the content-scanning modules that did not already have it.
5780 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5781 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5783 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5785 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5787 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5788 to test Sieve filters that use "vacation".
5790 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5791 that changes the way the GnuTLS parameters are stored in the cache file.
5792 The new format can be generated externally. For backward compatibility,
5793 if the data in the cache doesn't make sense, Exim assumes it has read an
5794 old-format file, and it generates new data and writes a new file. This
5795 means that you can't go back to an older release without removing the
5798 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5799 work if there are any delivery delays because "one_time" forces the
5800 parent to be marked "delivered", so its unseen clone is never tried
5801 again. For this reason, Exim now forbids the simultaneous setting of
5804 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5805 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5806 entry if you want to know the details. The fix, however, neglected to
5807 consider the case when local delivery batching is involved. The test for
5808 "previously delivered" was not happening when checking to see if an
5809 address could be batched with a previous (undelivered) one; under
5810 certain circumstances this could lead to multiple deliveries to the same
5813 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5814 in its include files, and this causes problems building Exim.
5816 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5817 header_syntax) but Exim was just ignoring anything given after a slash.
5818 In particular, this caused confusion with an attempt to use "verify =
5819 reverse_host_lookup/defer_ok". An error is now given when options are
5820 supplied for verify items that do not have them. (Maybe reverse_host_
5821 lookup should have a defer_ok option, but that's a different point.)
5823 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5824 defined by RFC 821) to 2048, because there were problems with some AUTH
5825 commands, and RFC 1869 says the size should be increased for extended
5826 SMTP commands that take arguments.
5828 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5831 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5832 "unknown" error; now it says that the functionality isn't in the binary.
5834 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5835 an address' error message when a string expansion fails (syntax or
5836 whatever). Otherwise the password may appear in the log. Following change
5837 PH/42 below, there is no longer a chance of it appearing in a bounce
5840 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5842 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5843 of its addresses was ever tried. (Bugzilla bug #2.)
5845 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5846 the result incorrectly in the debug output. (It correctly added a newline
5847 to what was transported.)
5849 TF/01 Added $received_time.
5851 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5852 commented out examples of how to interface to a virus scanner and to
5853 SpamAssassin. Also added commented examples of av_scanner and
5854 spamd_address settings.
5856 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5857 and controls are allowed in which ACLs. There were a couple of minor
5858 errors. Some of the entries in the conditions table (which is a table of
5859 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5860 negation of where the condition IS allowed.
5862 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5864 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5865 header file does not have a version number, so I've had to invent a new
5866 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5867 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5868 radiusclient), but it was contributed by a Radius user.
5870 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5871 files or directories, for OpenSSL.
5873 PH/19 When an Exim process that is running as root has to create an Exim log
5874 file, it does so in a subprocess that runs as exim:exim so as to get the
5875 ownership right at creation (otherwise, other Exim processes might see
5876 the file with the wrong ownership). There was no test for failure of this
5877 fork() call, which would lead to the process getting stuck as it waited
5878 for a non-existent subprocess. Forks do occasionally fail when resources
5879 run out. I reviewed all the other calls to fork(); they all seem to check
5882 PH/20 When checking for unexpected SMTP input at connect time (before writing
5883 the banner), Exim was not dealing correctly with a non-positive return
5884 from the read() function. If the client had disconnected by this time,
5885 the result was a log entry for a synchronization error with an empty
5886 string after "input=" when read() returned zero. If read() returned -1
5887 (an event I could not check), uninitialized data bytes were printed.
5888 There were reports of junk text (parts of files, etc) appearing after
5891 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5893 PH/22 Added support for macro redefinition, and (re)definition in between
5894 driver and ACL definitions.
5896 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5897 forgetting to use the resulting value; it was using the unexpanded value.
5899 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5900 hadn't been configured. The fix is from Juergen Kreileder, who
5901 understands it better than I do:
5903 "Here's what I see happening with three configured cyrus_sasl
5904 authenticators configured (plain, login, cram-md5):
5906 On startup auth_cyrus_sasl_init() gets called for each of these.
5907 This means three calls to sasl_listmech() without a specified mech_list.
5908 => SASL tests which mechs of all available mechs actually work
5909 => three warnings about OTP not working
5910 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5912 With the patch, sasl_listmech() also gets called three times. But now
5913 SASL's mech_list option is set to the server_mech specified in the the
5914 authenticator. Or in other words, the answer from sasl_listmech()
5915 gets limited to just the mech you're testing for (which is different
5917 => the return list contains just 'plain' or 'login', 'cram-md5' or
5918 nothing depending on the value of ob->server_mech.
5920 I've just tested the patch: Authentication still works fine,
5921 unavailable mechs specified in the exim configuration are still
5922 caught, and the auth.log warnings about OTP are gone."
5924 PH/25 When debugging is enabled, the contents of the command line are added
5925 to the debugging output, even when log_selector=+arguments is not
5928 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5929 answer is "GNU", and only if the return is "GNU/something" is the answer
5932 PH/27 $acl_verify_message is now set immediately after the failure of a
5933 verification in an ACL, and so is available in subsequent modifiers. In
5934 particular, the message can be preserved by coding like this:
5936 warn !verify = sender
5937 set acl_m0 = $acl_verify_message
5939 Previously, $acl_verify_message was set only while expanding "message"
5940 and "log_message" when a very denied access.
5942 PH/28 Modified OS/os.c-Linux with
5944 -#ifndef OS_LOAD_AVERAGE
5945 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5947 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5948 nomenclature these days.)
5950 PH/29 Installed patch from the Sieve maintainer that adds the options
5951 sieve_useraddress and sieve_subaddress to the redirect router.
5953 PH/30 In these circumstances:
5954 . Two addresses routed to the same list of hosts;
5955 . First host does not offer TLS;
5956 . First host accepts first address;
5957 . First host gives temporary error to second address;
5958 . Second host offers TLS and a TLS session is established;
5959 . Second host accepts second address.
5960 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5961 and peerdn, if requested) that were in fact used only for the second
5964 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5965 attention to any local part prefix or suffix that was matched by the
5966 router that accepted the address. It now behaves in the same way as it
5967 does for delivery: the affixes are removed from the local part unless
5968 rcpt_include_affixes is set on the transport.
5970 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5971 timeout during the DATA phase of an incoming message.
5973 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5974 applied a patch sanctioned by the Sieve maintainer.
5976 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5977 the uid or gid is negative. A case of a negative gid caused this to be
5978 noticed. The fix allows for either to be negative.
5980 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5981 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5984 PH/36 The change PH/12 above was broken. Fixed it.
5986 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5987 the grounds that routing the same address twice would always produce the
5988 same answer. This might have been true once, but it is certainly no
5989 longer true now. Routing a child address may depend on the previous
5990 routing that produced that child. Some complicated redirection strategies
5991 went wrong when messages had multiple recipients, and made Exim's
5992 behaviour dependent on the order in which the addresses were given.
5994 I have moved the duplicate checking until after the routing is complete.
5995 Exim scans the addresses that are assigned to local and remote
5996 transports, and removes any duplicates. This means that more work will be
5997 done, as duplicates will always all be routed, but duplicates are
5998 presumably rare, so I don't expect this is of any significance.
6000 For deliveries to pipes, files, and autoreplies, the duplicate checking
6001 still happens during the routing process, since they are not going to be
6004 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
6005 It corrects a timeout issue with spamd. This is Ian's comment: "The
6006 background is that sometimes spamd either never reads data from a
6007 connection it has accepted, or it never writes response data. The exiscan
6008 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
6009 blindly assumes that writes won't block so it may never time out."
6011 PH/39 Allow G after quota size as well as K and M.
6013 PH/40 The value set for $authenticated_id in an authenticator may not contain
6014 binary zeroes or newlines because the value is written to log lines and
6015 to spool files. There was no check on this. Now the value is run through
6016 the string_printing() function so that such characters are converted to
6017 printable escape sequences.
6019 PH/41 $message_linecount is a new variable that contains the total number of
6020 lines in the message. Compare $body_linecount, which is the count for the
6023 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6024 bounce and delay warning messages, except in certain special cases, which
6027 (a) An SMTP error message from a remote host;
6028 (b) A message specified in a :fail: redirection;
6029 (c) A message specified in a "fail" command in a system filter;
6030 (d) A message specified in a FAIL return from the queryprogram router;
6031 (e) A message specified by the cannot_route_message router option.
6033 In these cases only, Exim does include the error details in bounce and
6034 warning messages. There are also a few cases where bland messages such
6035 as "unrouteable address" or "local delivery error" are given.
6037 PH/43 $value is now also set for the "else" part of a ${run expansion.
6039 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6040 being worked on, but at least Exim now implements the latest version to
6043 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6044 process to complete was treated as a delivery failure, a timeout while
6045 writing the message to the pipe was logged, but erroneously treated as a
6046 successful delivery. Such timeouts include transport filter timeouts. For
6047 consistency with the overall process timeout, these timeouts are now
6048 treated as errors, giving rise to delivery failures by default. However,
6049 there is now a new Boolean option for the pipe transport called
6050 timeout_defer, which, if set TRUE, converts the failures into defers for
6051 both kinds of timeout. A transport filter timeout is now identified in
6054 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6055 systems where "make" and "gmake" are different, calling "gmake" at top
6056 level broke things. I've arranged for the value of $(MAKE) to be passed
6057 from the Makefile to this script so that it can call the same version of
6061 A note about Exim versions 4.44 and 4.50
6062 ----------------------------------------
6064 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6065 changes of various kinds. As a consequence, a big documentation update was
6066 needed. This delayed the release for rather longer than seemed good, especially
6067 in the light of a couple of (minor) security issues. Therefore, the changes
6068 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6069 release. So 4.44 and 4.50 are in effect two different branches that both start
6072 I have left the 4.50 change log unchanged; it contains all the changes since
6073 4.43. The change log for 4.44 is below; many of its items are identical to
6074 those for 4.50. This seems to be the most sensible way to preserve the
6075 historical information.
6081 1. Minor wording change to the doc/README.SIEVE file.
6083 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6084 computation of the current number of files was incorrect.
6086 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6087 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6090 4. Give more explanation in the error message when the command for a transport
6091 filter fails to execute.
6093 5. There are several places where Exim runs a non-Exim command in a
6094 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6095 was being done only for the command run by the queryprogram router. It is
6096 now done for all such subprocesses. The other cases are: ${run, transport
6097 filters, and the commands run by the lmtp and pipe transports.
6099 6. Added CONFIGURE_GROUP build-time option.
6101 7. Some older OS have a limit of 256 on the maximum number of file
6102 descriptors. Exim was using setrlimit() to set 1000 as a large value
6103 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6104 systems. I've change it so that if it can't get 1000, it tries for 256.
6106 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6107 was an oversight, and furthermore, ever since the addition of extra
6108 controls (e.g. 4.43/32), the checks on when to allow different forms of
6109 "control" were broken. There should now be diagnostics for all cases when a
6110 control that does not make sense is encountered.
6112 9. Added the /retain_sender option to "control=submission".
6114 10. $recipients is now available in the predata ACL (oversight).
6116 11. Tidy the search cache before the fork to do a delivery from a message
6117 received from the command line. Otherwise the child will trigger a lookup
6118 failure and thereby defer the delivery if it tries to use (for example) a
6119 cached ldap connection that the parent has called unbind on.
6121 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6122 of $address_data from the recipient verification was clobbered by the
6123 sender verification.
6125 13. The value of address_data from a sender verification is now available in
6126 $sender_address_data in subsequent conditions in the ACL statement.
6128 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6130 15. Added a new option "connect=<time>" to callout options, to set a different
6133 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6134 was its contents. (It was OK if the option was not defined at all.)
6136 17. A "Completed" log line is now written for messages that are removed from
6137 the spool by the -Mrm option.
6139 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6140 information about exactly what failed.
6142 19. Added -dd to debug only the daemon process.
6144 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6145 handles timeouts, both on the server side and network timeouts. Renamed the
6146 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6148 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6149 It is now set to "smtps".
6151 22. $host_address is now set to the target address during the checking of
6152 ignore_target_hosts.
6154 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6155 being passed; this would have caused $sender_host_name to have been used if
6156 matching the list had actually called for a host name (not very likely,
6157 since this list is usually IP addresses). A host name is now passed as
6160 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6161 code that specifies a non-restarting handler (typically sigaction() in
6162 modern systems) in an attempt to fix a rare and obscure crash bug.
6164 25. Narrowed the window for a race in the daemon that could cause it to ignore
6165 SIGCHLD signals. This is not a major problem, because they are used only to
6166 wake it up if nothing else does.
6168 26. A malformed maildirsize file could cause Exim to calculate negative values
6169 for the mailbox size or file count. Odd effects could occur as a result.
6170 The maildirsize information is now recalculated if the size or filecount
6173 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6174 support for a long time. Removed HAVE_SYS_VFS_H.
6176 28. Installed the latest version of exipick from John Jetmore.
6178 29. In an address list, if the pattern was not a regular expression, an empty
6179 subject address (from a bounce message) matched only if the pattern was an
6180 empty string. Non-empty patterns were not even tested. This was the wrong
6181 because it is perfectly reasonable to use an empty address as part of a
6182 database query. An empty address is now tested by patterns that are
6183 lookups. However, all the other forms of pattern expect the subject to
6184 contain a local part and a domain, and therefore, for them, an empty
6185 address still always fails if the pattern is not itself empty.
6187 30. Exim went into a mad DNS loop when attempting to do a callout where the
6188 host was specified on an smtp transport, and looking it up yielded more
6189 than one IP address.
6191 31. Re-factored the code for checking spool and log partition space into a
6192 function that finds that data and another that does the check. The former
6193 is then used to implement four new variables: $spool_space, $log_space,
6194 $spool_inodes, and $log_inodes.
6196 32. The RFC2047 encoding function was originally intended for short strings
6197 such as real names; it was not keeping to the 75-character limit for
6198 encoded words that the RFC imposes. It now respects the limit, and
6199 generates multiple encoded words if necessary. To be on the safe side, I
6200 have increased the buffer size for the ${rfc2047: expansion operator from
6203 33. It is now permitted to omit both strings after an "if" condition; if the
6204 condition is true, the result is "true". As before, when the second string
6205 is omitted, a false condition yields an empty string. This makes it less
6206 cumbersome to write custom ACL and router conditions.
6208 34. Failure to deliver a bounce message always caused it to be frozen, even if
6209 there was an errors_to setting on the router. The errors_to setting is now
6212 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6213 canonical form (fully expanded) before being placed in
6214 $sender_host_address.
6216 36. The table in the code that translates DNS record types into text (T_A to
6217 "A" for instance) was missing entries for NS and CNAME. It is just possible
6218 that this could have caused confusion if both these types were looked up
6219 for the same domain, because the text type is used as part of Exim's
6220 per-process caching. But the chance of anyone hitting this buglet seems
6223 37. The dnsdb lookup has been extended in a number of ways.
6225 (1) There is a new type, "zns", which walks up the domain tree until it
6226 finds some nameserver records. It should be used with care.
6228 (2) There is a new type, "mxh", which is like "mx" except that it returns
6229 just the host names, not the priorities.
6231 (3) It is now possible to give a list of domains (or IP addresses) to be
6232 looked up. The behaviour when one of the lookups defers can be
6233 controlled by a keyword.
6235 (4) It is now possible to specify the separator character for use when
6236 multiple records are returned.
6238 38. The dnslists ACL condition has been extended: it is now possible to supply
6239 a list of IP addresses and/or domains to be looked up in a particular DNS
6242 39. Added log_selector=+queue_time_overall.
6244 40. When running the queue in the test harness, wait just a tad after forking a
6245 delivery process, to get repeatability of debugging output.
6247 41. Include certificate and key file names in error message when GnuTLS fails
6248 to set them up, because the GnuTLS error message doesn't include the name
6249 of the failing file when there is a problem reading it.
6251 42. Allow both -bf and -bF in the same test run.
6253 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6255 44. The "Exiscan patch" is now merged into the mainline Exim source.
6257 45. Sometimes the final signoff response after QUIT could fail to get
6258 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6259 < 0 before doing a fflush(). This bug looks as though it goes back to the
6260 introduction of TLS in release 3.20, but "sometimes" must have been rare
6261 because the tests only now provoked it.
6263 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6264 (this can affect the format of dates).
6266 47. exim_tidydb, when checking for the continued existence of a message for
6267 which it has found a message-specific retry record, was not finding
6268 messages that were in split spool directories. Consequently, it was
6269 deleting retry records that should have stayed in existence.
6271 48. Steve fixed some bugs in eximstats.
6273 49. The SPA authentication driver was not abandoning authentication and moving
6274 on to the next authenticator when an expansion was forced to fail,
6275 contradicting the general specification for all authenticators. Instead it
6276 was generating a temporary error. It now behaves as specified.
6278 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6279 (the order specifies the preference for clients). The order is now AES256,
6280 AES128, 3DES, ARCFOUR128.
6282 51. Small patch to Sieve code - explicitly set From: when generating an
6285 52. Exim crashed if a remote delivery caused a very long error message to be
6286 recorded - for instance if somebody sent an entire SpamAssassin report back
6287 as a large number of 550 error lines. This bug was coincidentally fixed by
6288 increasing the size of one of Exim's internal buffers (big_buffer) that
6289 happened as part of the Exiscan merge. However, to be on the safe side, I
6290 have made the code more robust (and fixed the comments that describe what
6293 53. Now that there can be additional text after "Completed" in log lines (if
6294 the queue_time_overall log selector is set), a one-byte patch to exigrep
6295 was needed to allow it to recognize "Completed" as not the last thing in
6298 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6299 patch that reportedly fixes this has been added. I am not expert enough to
6300 create a test for it. This is what the patch creator wrote:
6302 "I found a little strange behaviour of ldap code when working with
6303 Windows 2003 AD Domain, where users was placed in more than one
6304 Organization Units. When I tried to give exim partial DN, the exit code
6305 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6306 But simultaneously result of request was absolutely normal ldap result,
6307 so I produce this patch..."
6309 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6310 REFERENCE, so I have modified the code to exclude the patch when that macro
6313 55. Some experimental protocols are using DNS PTR records for new purposes. The
6314 keys for these records are domain names, not reversed IP addresses. The
6315 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6316 leaves it alone. Component reversal etc. now happens only for IP addresses.
6319 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6321 57. Double the size of the debug message buffer (to 2048) so that more of very
6322 long debug lines gets shown.
6324 58. The exicyclog utility now does better if the number of log files to keep
6325 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6327 59. Two changes related to the smtp_active_hostname option:
6329 (1) $smtp_active_hostname is now available as a variable.
6330 (2) The default for smtp_banner uses $smtp_active_hostname instead
6331 of $primary_hostname.
6333 60. The host_aton() function is supposed to be passed a string that is known
6334 to be a valid IP address. However, in the case of IPv6 addresses, it was
6335 not checking this. This is a hostage to fortune. Exim now panics and dies
6336 if the condition is not met. A case was found where this could be provoked
6337 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6338 components; fortuitously, this particular loophole had already been fixed
6339 by change 4.50/55 above.
6341 If there are any other similar loopholes, the new check in host_aton()
6342 itself should stop them being exploited. The report I received stated that
6343 data on the command line could provoke the exploit when Exim was running as
6344 exim, but did not say which command line option was involved. All I could
6345 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6346 running as the user.
6349 61. There was a buffer overflow vulnerability in the SPA authentication code
6350 (which came originally from the Samba project). I have added a test to the
6351 spa_base64_to_bits() function which I hope fixes it.
6354 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6355 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6357 63. The daemon start-up calls getloadavg() while still root for those OS that
6358 need the first call to be done as root, but it missed one case: when
6359 deliver_queue_load_max is set with deliver_drop_privilege. This is
6360 necessary for the benefit of the queue runner, because there is no re-exec
6361 when deliver_drop_privilege is set.
6363 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6364 This has been fixed.
6366 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6367 was in use, was not putting the data itself into the right store pool;
6368 consequently, it could be overwritten for a subsequent message in the same
6369 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6372 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6374 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6375 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6376 the function were treating the return as a boolean value, which happened to
6377 work because 0=false and not-0=true, but is not correct code.
6379 68. The host_aton() function was not handling scoped IPv6 addresses (those
6380 with, for example, "%eth0" on the end) correctly.
6382 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6383 negated items (that is, ~something) in unsigned ints. Some compilers
6384 apparently mutter when there is no cast.
6386 70. If an address verification called from an ACL failed, and did not produce a
6387 user-specific message (i.e. there was only a "system" message), nothing was
6388 put in $acl_verify_message. In this situation, it now puts the system
6391 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6392 session; change 4.31/43 added the unwanted input to the log line - except
6393 that it did not do this in the start of session case. It now does.
6395 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6396 This is wrong and can cause the other end to generate a synchronization
6397 error if it is another Exim or anything else that does the synchronization
6398 check. A QUIT command is no longer sent after a timeout.
6400 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6401 during host lookups.
6403 74. The defer_ok option of callout verification was not working if it was used
6404 when verifying addresses in header lines, that is, for this case:
6406 verify = header_sender/callout=defer_ok
6408 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6409 those file descriptors could be used for SMTP connections. If anything
6410 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6411 could be sent to the SMTP client, causing chaos. The daemon now opens
6412 stdin, stdout, and stderr to /dev/null when it puts itself into the
6415 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6416 log by default. The user can override this with suitable Perl magic.
6418 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6419 the log message when discard triggers, was not working for the DATA ACL or
6420 for the non-SMTP ACL.
6422 78. Error message wording change in sieve.c.
6424 79. If smtp_accept_max_per_host was set, the number of connections could be
6425 restricted to fewer than expected, because the daemon was trying to set up
6426 a new connection before checking whether the processes handling previous
6427 connections had finished. The check for completed processes is now done
6428 earlier. On busy systems, this bug wouldn't be noticed because something
6429 else would have woken the daemon, and it would have reaped the completed
6432 80. If a message was submitted locally by a user whose login name contained one
6433 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6434 It caused a spool format error. I have fixed the spool reading code. A
6435 related problem was that the "from" clause in the Received: line became
6436 illegal because of the space(s). It is now covered by ${quote_local_part.
6438 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6441 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6443 83. Patch from Sieve maintainer to fix unterminated string problem in
6444 "vacation" handling.
6446 84. Some minor changes to the Linux configuration files to help with other
6447 OS variants using glibc.
6449 85. One more patch for Sieve to update vacation handling to latest spec.
6452 ----------------------------------------------------
6453 See the note above about the 4.44 and 4.50 releases.
6454 ----------------------------------------------------
6460 1. Change 4.43/35 introduced a bug that caused file counts to be
6461 incorrectly computed when quota_filecount was set in an appendfile
6464 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6465 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6468 3. Give more explanation in the error message when the command for a transport
6469 filter fails to execute.
6471 4. There are several places where Exim runs a non-Exim command in a
6472 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6473 was being done only for the command run by the queryprogram router. It is
6474 now done for all such subprocesses. The other cases are: ${run, transport
6475 filters, and the commands run by the lmtp and pipe transports.
6477 5. Some older OS have a limit of 256 on the maximum number of file
6478 descriptors. Exim was using setrlimit() to set 1000 as a large value
6479 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6480 systems. I've change it so that if it can't get 1000, it tries for 256.
6482 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6483 was an oversight, and furthermore, ever since the addition of extra
6484 controls (e.g. 4.43/32), the checks on when to allow different forms of
6485 "control" were broken. There should now be diagnostics for all cases when a
6486 control that does not make sense is encountered.
6488 7. $recipients is now available in the predata ACL (oversight).
6490 8. Tidy the search cache before the fork to do a delivery from a message
6491 received from the command line. Otherwise the child will trigger a lookup
6492 failure and thereby defer the delivery if it tries to use (for example) a
6493 cached ldap connection that the parent has called unbind on.
6495 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6496 of $address_data from the recipient verification was clobbered by the
6497 sender verification.
6499 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6500 was its contents. (It was OK if the option was not defined at all.)
6502 11. A "Completed" log line is now written for messages that are removed from
6503 the spool by the -Mrm option.
6505 12. $host_address is now set to the target address during the checking of
6506 ignore_target_hosts.
6508 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6509 being passed; this would have caused $sender_host_name to have been used if
6510 matching the list had actually called for a host name (not very likely,
6511 since this list is usually IP addresses). A host name is now passed as
6514 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6515 code that specifies a non-restarting handler (typically sigaction() in
6516 modern systems) in an attempt to fix a rare and obscure crash bug.
6518 15. Narrowed the window for a race in the daemon that could cause it to ignore
6519 SIGCHLD signals. This is not a major problem, because they are used only to
6520 wake it up if nothing else does.
6522 16. A malformed maildirsize file could cause Exim to calculate negative values
6523 for the mailbox size or file count. Odd effects could occur as a result.
6524 The maildirsize information is now recalculated if the size or filecount
6527 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6528 support for a long time. Removed HAVE_SYS_VFS_H.
6530 18. Updated exipick to current release from John Jetmore.
6532 19. Allow an empty sender to be matched against a lookup in an address list.
6533 Previously the only cases considered were a regular expression, or an
6536 20. Exim went into a mad DNS lookup loop when doing a callout where the
6537 host was specified on the transport, if the DNS lookup yielded more than
6540 21. The RFC2047 encoding function was originally intended for short strings
6541 such as real names; it was not keeping to the 75-character limit for
6542 encoded words that the RFC imposes. It now respects the limit, and
6543 generates multiple encoded words if necessary. To be on the safe side, I
6544 have increased the buffer size for the ${rfc2047: expansion operator from
6547 22. Failure to deliver a bounce message always caused it to be frozen, even if
6548 there was an errors_to setting on the router. The errors_to setting is now
6551 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6552 canonical form (fully expanded) before being placed in
6553 $sender_host_address.
6555 24. Updated eximstats to version 1.33
6557 25. Include certificate and key file names in error message when GnuTLS fails
6558 to set them up, because the GnuTLS error message doesn't include the name
6559 of the failing file when there is a problem reading it.
6561 26. Expand error message when OpenSSL has problems setting up cert/key files.
6564 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6565 (this can affect the format of dates).
6567 28. exim_tidydb, when checking for the continued existence of a message for
6568 which it has found a message-specific retry record, was not finding
6569 messages that were in split spool directories. Consequently, it was
6570 deleting retry records that should have stayed in existence.
6572 29. eximstats updated to version 1.35
6573 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6574 1.35 - bugfix such that pie charts by volume are generated correctly
6576 30. The SPA authentication driver was not abandoning authentication and moving
6577 on to the next authenticator when an expansion was forced to fail,
6578 contradicting the general specification for all authenticators. Instead it
6579 was generating a temporary error. It now behaves as specified.
6581 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6582 (the order specifies the preference for clients). The order is now AES256,
6583 AES128, 3DES, ARCFOUR128.
6585 31. Small patch to Sieve code - explicitly set From: when generating an
6588 32. Exim crashed if a remote delivery caused a very long error message to be
6589 recorded - for instance if somebody sent an entire SpamAssassin report back
6590 as a large number of 550 error lines. This bug was coincidentally fixed by
6591 increasing the size of one of Exim's internal buffers (big_buffer) that
6592 happened as part of the Exiscan merge. However, to be on the safe side, I
6593 have made the code more robust (and fixed the comments that describe what
6596 33. Some experimental protocols are using DNS PTR records for new purposes. The
6597 keys for these records are domain names, not reversed IP addresses. The
6598 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6599 leaves it alone. Component reversal etc. now happens only for IP addresses.
6602 34. The host_aton() function is supposed to be passed a string that is known
6603 to be a valid IP address. However, in the case of IPv6 addresses, it was
6604 not checking this. This is a hostage to fortune. Exim now panics and dies
6605 if the condition is not met. A case was found where this could be provoked
6606 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6607 components; fortuitously, this particular loophole had already been fixed
6608 by change 4.50/55 or 4.44/33 above.
6610 If there are any other similar loopholes, the new check in host_aton()
6611 itself should stop them being exploited. The report I received stated that
6612 data on the command line could provoke the exploit when Exim was running as
6613 exim, but did not say which command line option was involved. All I could
6614 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6615 running as the user.
6618 35. There was a buffer overflow vulnerability in the SPA authentication code
6619 (which came originally from the Samba project). I have added a test to the
6620 spa_base64_to_bits() function which I hope fixes it.
6623 36. The daemon start-up calls getloadavg() while still root for those OS that
6624 need the first call to be done as root, but it missed one case: when
6625 deliver_queue_load_max is set with deliver_drop_privilege. This is
6626 necessary for the benefit of the queue runner, because there is no re-exec
6627 when deliver_drop_privilege is set.
6629 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6630 was in use, was not putting the data itself into the right store pool;
6631 consequently, it could be overwritten for a subsequent message in the same
6632 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6635 38. Sometimes the final signoff response after QUIT could fail to get
6636 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6637 < 0 before doing a fflush(). This bug looks as though it goes back to the
6638 introduction of TLS in release 3.20, but "sometimes" must have been rare
6639 because the tests only now provoked it.
6645 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6646 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6647 Now it returns an integer. A number of calls were still expecting a T/F
6648 return. Fortuitously, in all cases, the tests worked in OK situations,
6649 which is the norm. However, things would have gone wrong on any write
6650 failures on the smtp file descriptor. This function is used when sending
6651 messages over SMTP and also when doing verify callouts.
6653 2. When Exim is called to do synchronous delivery of a locally submitted
6654 message (the -odf or -odi options), it no longer closes stderr before doing
6657 3. Implemented the mua_wrapper option.
6659 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6661 5. Implemented the functions header_remove(), header_testname(),
6662 header_add_at_position(), and receive_remove_recipient(), and exported them
6665 6. If an ACL "warn" statement specified the addition of headers, Exim already
6666 inserted X-ACL-Warn: at the start if there was no header name. However, it
6667 was not making this test for the second and subsequent header lines if
6668 there were newlines in the string. This meant that an invalid header could
6669 be inserted if Exim was badly configured.
6671 7. Allow an ACL "warn" statement to add header lines at the start or after all
6672 the Received: headers, as well as at the end.
6674 8. Added the rcpt_4xx retry error code.
6676 9. Added postmaster_mailfrom=xxx to callout verification option.
6678 10. Added mailfrom=xxxx to the callout verification option, for verify=
6681 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6682 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6684 12. Inserted some casts to stop certain compilers warning when using pointer
6685 differences as field lengths or precisions in printf-type calls (mostly
6686 affecting debugging statements).
6688 13. Added optional readline() support for -be (dynamically loaded).
6690 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6691 same clock tick as a message's arrival, so that its received time was the
6692 same as the "first fail" time on the retry record, and that message
6693 remained on the queue past the ultimate address timeout, every queue runner
6694 would try a delivery (because it was past the ultimate address timeout) but
6695 after another failure, the ultimate address timeout, which should have then
6696 bounced the address, did not kick in. This was a "< instead of <=" error;
6697 in most cases the first failure would have been in the next clock tick
6698 after the received time, and all would be well.
6700 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6701 being recognized when the domain list was tested by the match_domain
6702 condition in an expansion string.
6704 16. Added the ${str2b64: operator.
6706 17. Exim was always calling setrlimit() to set a large limit for the number of
6707 processes, without checking whether the existing limit was already
6708 adequate. (It did check for the limit on file descriptors.) Furthermore,
6709 errors from getrlimit() and setrlimit() were being ignored. Now they are
6710 logged to the main and panic logs, but Exim does carry on, to try to do its
6711 job under whatever limits there are.
6713 18. Imported PCRE 5.0.
6715 19. Trivial typo in log message " temporarily refused connection" (the leading
6718 20. If the log selector return_path_on_delivery was set and an address was
6719 redirected to /dev/null, the delivery process crashed because it assumed
6720 that a return path would always be set for a "successful" delivery. In this
6721 case, the whole delivery is bypassed as an optimization, and therefore no
6724 21. Internal re-arrangement: the function for sending a challenge and reading
6725 a response while authentication was assuming a zero-terminated challenge
6726 string. It's now changed to take a pointer and a length, to allow for
6727 binary data in such strings.
6729 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6731 23. Exim was not respecting finduser_retries when seeking the login of the
6732 uid under which it was called; it was always trying 10 times. (The default
6733 setting of finduser_retries is zero.) Also, it was sleeping after the final
6734 failure, which is pointless.
6736 24. Implemented tls_on_connect_ports.
6738 25. Implemented acl_smtp_predata.
6740 26. If the domain in control=submission is set empty, Exim assumes that the
6741 authenticated id is a complete email address when it generates From: or
6742 Sender: header lines.
6744 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6745 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6746 chown and chgrp in /bin and hostname in /usr/bin.
6748 28. Exim was keeping the "process log" file open after each use, just as it
6749 does for the main log. This opens the possibility of it remaining open for
6750 long periods when the USR1 signal hits a daemon. Occasional processlog
6751 errors were reported, that could have been caused by this. Anyway, it seems
6752 much more sensible not to leave this file open at all, so that is what now
6755 29. The long-running daemon process does not normally write to the log once it
6756 has entered its main loop, and it closes the log before doing so. This is
6757 so that log files can straightforwardly be renamed and moved. However,
6758 there are a couple of unusual error situations where the daemon does write
6759 log entries, and I had neglected to close the log afterwards.
6761 30. The text of an SMTP error response that was received during a remote
6762 delivery was being truncated at 512 bytes. This is too short for some of
6763 the long messages that one sometimes sees. I've increased the limit to
6766 31. It is now possible to make retry rules that apply only when a message has a
6767 specific sender, in particular, an empty sender.
6769 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6770 it possible to be selective about when SMTP synchronization is enforced.
6772 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6774 32. Implemented hosts_connection_nolog.
6776 33. Added an ACL for QUIT.
6778 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6781 35. Added mailbox_size and mailbox_filecount to appendfile.
6783 36. Added control = no_multiline_responses to ACLs.
6785 37. There was a bug in the logic of the code that waits for the clock to tick
6786 in the case where the clock went backwards by a substantial amount such
6787 that the microsecond fraction of "now" was more than the microsecond
6788 fraction of "then" (but the whole seconds number was less).
6790 38. Added support for the libradius Radius client library this is found on
6791 FreeBSD (previously only the radiusclient library was supported).
6797 1. When certain lookups returned multiple values in the form name=value, the
6798 quoting of the values was not always being done properly. Specifically:
6799 (a) If the value started with a double quote, but contained no whitespace,
6801 (b) If the value contained whitespace other than a space character (i.e.
6802 tabs or newlines or carriage returns) it was not quoted.
6803 This fix has been applied to the mysql and pgsql lookups by writing a
6804 separate quoting function and calling it from the lookup code. The fix
6805 should probably also be applied to nisplus, ibase and oracle lookups, but
6806 since I cannot test any of those, I have not disturbed their existing code.
6808 2. A hit in the callout cache for a specific address caused a log line with no
6809 reason for rejecting RCPT. Now it says "Previous (cached) callout
6810 verification failure".
6812 3. There was an off-by-one bug in the queryprogram router. An over-long
6813 return line was truncated at 256 instead of 255 characters, thereby
6814 overflowing its buffer with the terminating zero. As well as fixing this, I
6815 have increased the buffer size to 1024 (and made a note to document this).
6817 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6818 when Exim is waiting for an SMTP response from a remote server, Exim
6819 restarts its select() call on the socket, thereby resetting its timeout.
6820 This is not a problem when such interrupts are rare. Somebody set up a cron
6821 job to run exiwhat every 2 minutes, which is less than the normal select()
6822 timeout (5 or 10 minutes). This meant that the select() timeout never
6823 kicked in because it was always reset. I have fixed this by comparing the
6824 time when an interrupt arrives with the time at the start of the first call
6825 to select(). If more time than the timeout has elapsed, the interrupt is
6826 treated as a timeout.
6828 5. Some internal re-factoring in preparation for the addition of Sieve
6829 extensions (by MH). In particular, the "personal" test is moved to a
6830 separate function, and given an option for scanning Cc: and Bcc: (which is
6831 not set for Exim filters).
6833 6. When Exim created an email address using the login of the caller as the
6834 local part (e.g. when creating a From: or Sender: header line), it was not
6835 quoting the local part when it contained special characters such as @.
6837 7. Installed new OpenBSD configuration files.
6839 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6840 try to make them clearer.
6842 9. Callout options, other than the timeout value, were being ignored when
6843 verifying sender addresses in header lines. For example, when using
6845 verify = header_sender/callout=no_cache
6847 the cache was (incorrectly) being used.
6849 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6850 only the Cygwin environment.
6852 11. When return_path_on_delivery was set as a log selector, if different remote
6853 addresses in the same message used different return paths and parallel
6854 remote delivery occurred, the wrong values would sometimes be logged.
6855 (Whenever a remote delivery process finished, the return path value from
6856 the most recently started remote delivery process was logged.)
6858 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6859 lines when AUTH and/or TLS are in use. This is the "received protocol"
6860 field. Exim used to use "asmtp" for authenticated SMTP, without any
6861 indication (in the protocol name) for TLS use. Now it follows the RFC and
6862 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6863 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6864 names appear in log lines as well as in Received: header lines.
6866 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6867 extensions, and comparison tests, and to fix some bugs.
6869 14. Changes to the "personal" filter test:
6871 (1) The test was buggy in that it was just doing the equivalent of
6872 "contains" tests on header lines. For example, if a user's address was
6873 anne@some.where, the "personal" test would incorrectly be true for
6875 To: susanne@some.where
6877 This test is now done by extracting each address from the header in turn,
6878 and checking the entire address. Other tests that are part of "personal"
6879 are now done using regular expressions (for example, to check local parts
6880 of addresses in From: header lines).
6882 (2) The list of non-personal local parts in From: addresses has been
6883 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6884 taken from the Sieve specification recommendations.
6886 (3) If the message contains any header line starting with "List-" it is
6887 treated as non-personal.
6889 (4) The test for "circular" in the Subject: header line has been removed
6890 because it now seems ill-conceived.
6892 15. Minor typos in src/EDITME comments corrected.
6894 16. Installed latest exipick from John Jetmore.
6896 17. If headers_add on a router specified a text string that was too long for
6897 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6898 of string_sprintf() is now avoided.
6900 18. $message_body_size was not set (it was always zero) when running the DATA
6901 ACL and the local_scan() function.
6903 19. For the "mail" command in an Exim filter, no default was being set for
6904 the once_repeat time, causing a random time value to be used if "once" was
6905 specified. (If the value happened to be <= 0, no repeat happened.) The
6906 default is now 0s, meaning "never repeat". The "vacation" command was OK
6907 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6908 (I found it when inspecting the code).
6910 20. There is now an overall timeout for performing a callout verification. It
6911 defaults to 4 times the callout timeout, which applies to individual SMTP
6912 commands during the callout. The overall timeout applies when there is more
6913 than one host that can be tried. The timeout is checked before trying the
6914 next host. This prevents very long delays if there are a large number of
6915 hosts and all are timing out (e.g. when the network connections are timing
6916 out). The value of the overall timeout can be changed by specifying an
6917 additional sub-option for "callout", called "maxwait". For example:
6919 verify = sender/callout=5s,maxwait=20s
6921 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6922 to the end before writing, but this should make it even safer).
6924 22. Exim was forgetting that it had advertised PIPELINING for the second and
6925 subsequent messages on an SMTP connection. It was also not resetting its
6926 memory on STARTTLS and an internal HELO.
6928 23. When Exim logs an SMTP synchronization error within a session, it now
6929 records whether PIPELINING has been advertised or not.
6931 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6932 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6933 rather than long int.
6935 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6937 26. Added the never_mail option to autoreply.
6943 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6944 crash if the getsockname() call failed; this can happen if a connection is
6945 closed very soon after it is established. The problem was simply in the
6946 order in which certain operations were done, causing Exim to try to write
6947 to the SMTP stream before it had set up the file descriptor. The bug has
6948 been fixed by making things happen in the correct order.
6954 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6955 before the connection was closed, thus losing the rejection response.
6957 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6958 some early Solaris releases, but causes trouble in current releases where
6959 socklen_t is defined.
6961 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6964 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6967 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6968 that releasing the top of it at the end releases what was used for sub-
6969 expansions (unless the block got too big). However, discard this block if
6970 the first thing is a variable or header, so that we can use its block when
6971 it is dynamic (useful for very large $message_headers, for example).
6973 6. Lookups now cache *every* query, not just the most recent. A new, separate
6974 store pool is used for this. It can be recovered when all lookup caches are
6975 flushed. Lookups now release memory at the end of their result strings.
6976 This has involved some general refactoring of the lookup sources.
6978 7. Some code has been added to the store_xxx() functions to reduce the amount
6979 of flapping under certain conditions.
6981 8. log_incoming_interface used to affect only the <= reception log lines. Now
6982 it causes the local interface and port to be added to several more SMTP log
6983 lines, for example "SMTP connection from", and rejection lines.
6985 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6987 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6989 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6990 could be overwritten at the end of the current message (or the start of a
6991 new message if it was set in a HELO ACL). The value is now preserved for
6992 the duration of the SMTP connection.
6994 12. If a transport had a headers_rewrite setting, and a matching header line
6995 contained an unqualified address, that address was qualified, even if it
6996 did not match any rewriting rules. The underlying bug was that the values
6997 of the flags that permit the existence of unqualified sender and recipient
6998 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6999 non-local messages, and by -bnq for local messages) were not being
7000 preserved with the message after it was received.
7002 13. When Exim was logging an SMTP synchronization error, it could sometimes log
7003 "next input=" as part of the text comprising the host identity instead of
7004 the correct text. The code was using the same buffer for two different
7005 strings. However, depending on which order the printing function evaluated
7006 its arguments, the bug did not always show up. Under Linux, for example, my
7007 test suite worked just fine.
7009 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
7010 doesn't work with some older versions of Perl. It has been changed to "my",
7011 which in any case is probably the better facility to use.
7013 15. A really picky compiler found some instances of statements for creating
7014 error messages that either had too many or two few arguments for the format
7017 16. The size of the buffer for calls to the DNS resolver has been increased
7018 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7019 for addresses that have a lot of PTR records. This alleviates a problem; it
7020 does not fully solve it.
7022 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7023 buffer now truncates the list and logs the incident, which is the same
7024 action as happens when Exim is looking up a host name and its aliases.
7025 Previously in this situation something unpredictable would happen;
7026 sometimes it was "internal error: store_reset failed".
7028 18. If a server dropped the connection unexpectedly when an Exim client was
7029 using GnuTLS and trying to read a response, the client delivery process
7030 crashed while trying to generate an error log message.
7032 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7033 string, for example:
7035 warn message = H1: something\nH2: something
7037 the text was added as a single header line from Exim's point of view
7038 though it ended up OK in the delivered message. However, searching for the
7039 second and subsequent header lines using $h_h2: did not work. This has been
7040 fixed. Similarly, if a system filter added multiple headers in this way,
7041 the routers could not see them.
7043 20. Expanded the error message when iplsearch is called with an invalid key to
7044 suggest using net-iplsearch in a host list.
7046 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7047 ACLs are no longer actually imposed (and a message to that effect is
7050 22. If a "gecos" field in a passwd entry contained escaped characters, in
7051 particular, if it contained a \" sequence, Exim got it wrong when building
7052 a From: or a Sender: header from that name. A second bug also caused
7053 incorrect handling when an unquoted " was present following a character
7054 that needed quoting.
7056 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7057 was not being matched caselessly.
7059 24. Arranged for all hyphens in the exim.8 source to be escaped with
7062 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7063 properly. Recipient callout cache records were still being keyed to include
7064 the sender, even when use_sender was set false. This led to far more
7065 callouts that were necessary. The sender is no longer included in the key
7066 when use_sender is false.
7068 26. Added "control = submission" modifier to ACLs.
7070 27. Added the ${base62d: operator to decode base 62 numbers.
7072 28. dnsdb lookups can now access SRV records.
7074 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7075 the configuration file.
7077 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7078 (-v) mode. This makes the output for a verbose queue run more intelligible.
7080 31. Added a use_postmaster feature to recipient callouts.
7082 32. Added the $body_zerocount variable, containing the number of binary zero
7083 bytes in the message body.
7085 33. The time of last modification of the "new" subdirectory is now used as the
7086 "mailbox time last read" when there is a quota error for a maildir
7089 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7091 35. Added +ignore_unknown as a special item in host lists.
7093 36. Code for decoding IPv6 addresses in host lists is now included, even if
7094 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7095 address was recognized as an IP address, but was then not correctly decoded
7096 into binary, causing unexpected and incorrect effects when compared with
7103 1. Very minor rewording of debugging text in manualroute to say "list of
7104 hosts" instead of "hostlist".
7106 2. If verify=header_syntax was set, and a header line with an unqualified
7107 address (no domain) and a large number of spaces between the end of the
7108 name and the colon was received, the reception process suffered a buffer
7109 overflow, and (when I tested it) crashed. This was caused by some obsolete
7110 code that should have been removed. The fix is to remove it!
7112 3. When running in the test harness, delay a bit after writing a bounce
7113 message to get a bit more predictability in the log output.
7115 4. Added a call to search_tidyup() just before forking a reception process. In
7116 theory, someone could use a lookup in the expansion of smtp_accept_max_
7117 per_host which, without the tidyup, could leave open a database connection.
7119 5. Added the variables $recipient_data and $sender_data which get set from a
7120 lookup success in an ACL "recipients" or "senders" condition, or a router
7121 "senders" option, similar to $domain_data and $local_part_data.
7123 6. Moved the writing of debug_print from before to after the "senders" test
7126 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7127 problems for message scanning, either using a data ACL, or using
7128 local_scan() because the Received: header was not generated till after they
7129 were called (in order to set the time as the time of reception completion).
7130 I have revised the way this works. The header is now generated after the
7131 body is received, but before the ACL or local_scan() are called. After they
7132 are run, the timestamp in the header is updated.
7138 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7139 before starting a queue runner without re-exec. This happened only when
7140 deliver_drop_privilege was set or when the Exim user was set to root. The
7141 effect of the bug was that timeouts during subsequent deliveries caused
7142 crashes instead of being properly handled. The handler is now left at its
7143 default (and expected) setting.
7145 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7146 message, again when deliver_drop_privilege is set or Exim is run as root.
7147 The bug described in (1) was not present in this case, but the tidying up
7148 of the other signals was missing. I have made the two cases consistent.
7150 3. The ignore_target_hosts setting on a manualroute router was being ignored
7151 for hosts that were looked up using the /MX notation.
7153 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7156 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7157 operated on the sender address. After changing the $sender_address to <>
7158 for the sender address verify, Exim was re-instated it as the original
7159 (before rewriting) address, but remembering that it had rewritten it, so it
7160 wasn't rewriting it again. This bug also had the effect of breaking the
7161 sender address verification caching when the sender address was rewritten.
7163 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7164 This has been changed so that if the ip literal address matches
7165 ignore_target_hosts, the router declines.
7167 7. Added expansion conditions match_domain, match_address, and match_local_
7168 part (NOT match_host).
7170 8. The placeholder for the Received: header didn't have a length field set.
7172 9. Added code to Exim itself and to exim_lock to test for a specific race
7173 condition that could lead to file corruption when using MBX delivery. The
7174 issue is with the lockfile that is created in /tmp. If this file is removed
7175 after a process has opened it but before that process has acquired a lock,
7176 there is the potential for a second process to recreate the file and also
7177 acquire a lock. This could lead to two Exim processes writing to the file
7178 at the same time. The added code performs the same test as UW imapd; it
7179 checks after acquiring the lock that its file descriptor still refers to
7180 the same named file.
7182 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7183 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7186 11. Added the smtp_active_hostname option. If used, this will typically be made
7187 to depend on the incoming interface address. Because $interface_address is
7188 not set up until the daemon has forked a reception process, error responses
7189 that can happen earlier (such as "too many connections") no longer contain
7192 12. If an expansion in a condition on a "warn" statement fails because a lookup
7193 defers, the "warn" statement is abandoned, and the next ACL statement is
7194 processed. Previously this caused the whole ACL to be aborted.
7196 13. Added the iplsearch lookup type.
7198 14. Added ident_timeout as a log selector.
7200 15. Added tls_certificate_verified as a log selector.
7202 16. Added a global option tls_require_ciphers (compare the smtp transport
7203 option of the same name). This controls incoming TLS connections.
7205 17. I finally figured out how to make tls_require_ciphers do a similar thing
7206 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7207 before starting the TLS session.
7209 18. Tabs are now shown as \t in -bP output.
7211 19. If the log selector return_path_on_delivery was set, Exim crashed when
7212 bouncing a message because it had too many Received: header lines.
7214 20. If two routers both had headers_remove settings, and the first one included
7215 a superfluous trailing colon, the final name in the first list and the
7216 first name in the second list were incorrectly joined into one item (with a
7217 colon in the middle).
7223 1. Added -C and -D options to the exinext utility, mainly to make it easier
7224 to include in the automated testing, but these could be helpful when
7225 multiple configurations are in use.
7227 2. The exinext utility was not formatting the output nicely when there was
7228 an alternate port involved in the retry record key, nor when there was a
7229 message id as well (for retries that were specific to a specific message
7230 and a specific host). It was also confused by IPv6 addresses, because of
7231 the additional colons they contain. I have fixed the IPv4 problem, and
7232 patched it up to do a reasonable job for IPv6.
7234 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7235 delivery, the log line now contains "pipelined" if PIPELINING was used.
7237 4. An SMTP transport process used to panic and die if the bind() call to set
7238 an explicit outgoing interface failed. This has been changed; it is now
7239 treated in the same way as a connect() failure.
7241 5. A reference to $sender_host_name in the part of a conditional expansion
7242 that was being skipped was still causing a DNS lookup. This no longer
7245 6. The def: expansion condition was not recognizing references to header lines
7246 that used bh_ and bheader_.
7248 7. Added the _cache feature to named lists.
7250 8. The code for checking quota_filecount in the appendfile transport was
7251 allowing one more file than it should have been.
7253 9. For compatibility with Sendmail, the command line option
7261 and sets the incoming protocol and host name (for trusted callers). The
7262 host name and its colon can be omitted when only the protocol is to be set.
7263 Note the Exim already has two private options, -pd and -ps, that refer to
7264 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7265 "s", but I don't think that's a major issue.
7267 10. A number of refactoring changes to the code, none of which should affect
7270 (a) The number of logging options was getting close to filling up the
7271 32-bit word that was used as a bit map. I have split them into two classes:
7272 those that are passed in the argument to log_write(), and those that are
7273 only ever tested independently outside of that function. These are now in
7274 separate 32-bit words, so there is plenty of room for expansion again.
7275 There is no change in the user interface or the logging behaviour.
7277 (b) When building, for example, log lines, the code previously used a
7278 macro that called string_cat() twice, in order to add two strings. This is
7279 not really sufficiently general. Furthermore, there was one instance where
7280 it was actually wrong because one of the argument was used twice, and in
7281 one call a function was used. (As it happened, calling the function twice
7282 did not affect the overall behaviour.) The macro has been replaced by a
7283 function that can join an arbitrary number of extra strings onto a growing
7286 (c) The code for expansion conditions now uses a table and a binary chop
7287 instead of a serial search (which was left over from when there were very
7288 few conditions). Also, it now recognizes conditions like "pam" even when
7289 the relevant support is not compiled in: a suitably worded error message is
7290 given if an attempt is made to use such a condition.
7292 11. Added ${time_interval:xxxxx}.
7294 12. A bug was causing one of the ddress fields not to be passed back correctly
7295 from remote delivery subprocesses. The field in question was not being
7296 subsequently used, so this caused to problems in practice.
7298 13. Added new log selectors queue_time and deliver_time.
7300 14. Might have fixed a bug in maildirsizefile handling that threw up
7301 "unexpected character" debug warnings, and recalculated the data
7302 unnecessarily. In any case, I expanded the warning message to give more
7305 15. Added the message "Restricted characters in address" to the statements in
7306 the default ACL that block characters like @ and % in local parts.
7308 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7309 Three changes have been made:
7311 (a) There was a serious bug; a negative response to MAIL caused the whole
7312 recipient domain to be cached as invalid, thereby blocking all messages
7313 to all local parts at the same domain, from all senders. This bug has
7314 been fixed. The domain is no longer cached after a negative response to
7315 MAIL if the sender used is not empty.
7317 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7320 (c) A new callout option, "use_sender" has been added for people who want
7321 the modified behaviour.
7327 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7330 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7331 indeed breaks things for older releases.
7333 3. Added additional logging to the case where there is a problem reading data
7334 from a filter that is running in a subprocess using a pipe, in order to
7335 try to track down a specific problem.
7337 4. Testing facility fudge: when running in the test harness and attempting
7338 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7339 getting "No route to host". Convert this to a timeout.
7341 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7344 6. Some OS don't have socklen_t but use size_t instead. This affects the
7345 fifth argument of getsockopt() amongst other things. This is now
7346 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7347 can be set for individual OS. I have set it for SunOS5, OSF1, and
7348 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7349 some earlier ones do not.
7351 7. Change 4.30/15 was not doing the test caselessly.
7353 8. The standard form for an IPv6 address literal was being rejected by address
7354 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7355 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7356 this, as well as the form without the "IPv6" on the front (but only when
7357 address literals are enabled, of course).
7359 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7361 10. Exim crashed if a message with an empty sender address specified by -f
7362 encountered a router with an errors_to setting. This could be provoked only
7363 by a command such as
7367 where an empty string was supplied; "<>" did not hit this bug.
7369 11. Installed PCRE release 4.5.
7371 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7372 remained set. It is now erased.
7374 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7375 times from message ids (which are base 36 rather than the normal 62).
7377 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7378 were being counted as actual protocol errors, and logged if the log
7379 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7380 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7381 and DATA following a set of rejected RCPTs do not count as protocol errors.
7382 In other words, Exim assumes they were pipelined, though this may not
7383 actually be the case. Of course, in all cases the client gets an
7384 appropriate error code.
7386 15. If a lookup fails in an ACL condition, a message about the failure may
7387 be available; it is used if testing the ACL cannot continue, because most
7388 such messages specify what the cause of the deferral is. However, some
7389 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7390 that caused an old message to be retained and used if a later statement
7391 caused a defer, replacing the real cause of the deferral.
7393 16. If an IP address had so many PTR records that the DNS lookup buffer
7394 was not large enough to hold them, Exim could crash while trying to process
7395 the truncated data. It now detects and logs this case.
7397 17. Further to 4.21/58, another change has been made: if (and only if) the
7398 first line of a message (the first header line) ends with CRLF, a bare LF
7399 in a subsequent header line has a space inserted after it, so as not to
7400 terminate the header.
7402 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7403 unnecessarily, used atoi() instead of strtol(), and didn't check the
7404 termination when getting file sizes from file names by regex.
7406 19. Completely re-implemented the support for maildirsize files, in the light
7407 of a number of problems with the previous contributed implementation
7408 (4.30/29). In particular:
7410 . If the quota is zero, the maildirsize file is maintained, but no quota is
7413 . If the maildir directory does not exist, it is created before any attempt
7414 to write a maildirsize file.
7416 . The quota value in the file is just a cache; if the quota is changed in
7417 the transport, the new value overrides.
7419 . A regular expression is available for excluding directories from the
7422 20. The autoreply transport checks the characters in options that define the
7423 message's headers; it allows continued headers, but it was checking with
7424 isspace() after an embedded newline instead of explicitly looking for a
7427 21. If all the "regular" hosts to which an address was routed had passed their
7428 expiry times, and had not reached their retry times, the address was
7429 bounced, even if fallback hosts were defined. Now Exim should go on to try
7432 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7433 equivalent code in the SMTP transport. Some hosts send humungous responses
7434 to HELO/EHLO, more than 1024 it seems.
7436 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7437 gives compiler warnings in some environments. I've now done it "properly",
7440 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7441 (because of problems with the built-in one) was declared to return uschar *
7442 instead of char *, causing compiler failure.
7444 25. Fixed a file descriptor leak when processing alias/forward files.
7446 26. Fixed a minor format string issue in dbfn.c.
7448 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7450 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7451 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7454 29. When a sender address is verified, it is cached, to save repeating the test
7455 when there is more than one recipient in a message. However, when the
7456 verification involves a callout, it is possible for different callout
7457 options to be set for different recipients. It is too complicated to keep
7458 track of this in the cache, so now Exim always runs a verification when a
7459 callout is required, relying on the callout cache for the optimization.
7460 The overhead is duplication of the address routing, but this should not be
7463 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7464 to be verified with callout=postmaster, and the main callout worked but the
7465 postmaster check failed, the verification correctly failed. However, if a
7466 subsequent RCPT command asked for sender verification *without* the
7467 postmaster check, incorrect caching caused this verification also to fail,
7470 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7471 it was not caching the DNS options (qualify_single, search_parents) that
7472 were used when the lookup failed. A subsequent lookup with different
7473 options therefore always gave the same answer, though there were cases
7474 where it should not have. (Example: a "domains = !$mx_any" option on a
7475 dnslookup router: the "domains" option is always processed without any
7476 widening, but the router might have qualify_single set.) Now Exim uses the
7477 cached value only when the same options are set.
7479 32. Added John Jetmore's "exipick" utility to the distribution.
7481 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7482 than a timeout (e.g. a certificate is required, and is not provided), an
7483 Exim server now closes the connection immediately. Previously it waited for
7484 the client to close - but if the client is SSL, it seems that they each
7485 wait for each other, leading to a delay before one of them times out.
7487 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7488 maintained 0.8.x compatibility because I don't think many are using it, and
7489 it is clearly obsolete.
7491 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7494 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7495 client certificate was expired. A simple patch fixes this, though I don't
7496 understand the full logic of why the verify callback is called multiple
7499 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7500 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7501 which causes problems with some clients (such as the Certicom SSL Plus
7502 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7503 disables the coutermeasure allowing Eudora to connect."
7505 38. Exim was not checking that a write() to a log file succeeded. This could
7506 lead to Bad Things if a log got too big, in particular if it hit a file
7507 size limit. Exim now panics and dies if it cannot write to a log file, just
7508 as it does if it cannot open a log file.
7510 39. Modified OS/Makefile-Linux so that it now contains
7512 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7514 The two -D definitions ensure that Exim is compiled with large file
7515 support, which makes it possible to handle log files that are bigger than
7518 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7519 instance) a domain was checked against a named list that involved a lookup,
7520 causing $domain_data to be set, then another domain was checked against the
7521 same list, then the first domain was re-checked, the value of $domain_data
7522 after the final check could be wrong. In particular, if the second check
7523 failed, it could be set empty. This bug probably also applied to
7526 41. The strip_trailing_dot option was not being applied to the address given
7527 with the -f command-line option.
7529 42. The code for reading a message's header from the spool was incrementing
7530 $received_count, but never initializing it. This meant that the value was
7531 incorrect (doubled) while delivering a message in the same process in which
7532 it was received. In the most common configuration of Exim, this never
7533 happens - a fresh exec is done - but it can happen when
7534 deliver_drop_privilege is set.
7536 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7537 it now includes up to 150 characters of the unexpected data in the log
7540 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7541 and building data strings. The size of both of these buffers was 10 000
7542 bytes - far larger than anybody would *ever* want, thought I. Needless to
7543 say, somebody hit the limit. I have increased the maximum line length to
7544 20 000 and the maximum data length of concatenated lines to 100 000. I have
7545 also fixed two bugs, because there was no checking on these buffers. Tsk,
7546 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7547 buffer is too small.
7549 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7550 lsearch lookups. Now it does.
7552 46. When parsing a route_list item in a manualroute router, a fixed-length
7553 buffer was used for the list of hosts. I made this 1024 bytes long,
7554 thinking that nobody would ever have a list of hosts that long. Wrong.
7555 Somebody had a whole pile of complicated expansion conditions, and the
7556 string was silently truncated, leading to an expansion error. It turns out
7557 that it is easier to change to an unlimited length (owing to other changes
7558 that have happened since this code was originally written) than to build
7559 structure for giving a limitation error. The length of the item that
7560 expands into the list of hosts is now unlimited.
7562 47. The lsearch lookup could not handle data where the length of text line was
7563 more than 4095 characters. Such lines were truncated, leading to shortened
7564 data being returned. It should now handle lines of any length.
7566 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7567 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7570 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7571 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7572 no longer happens in comment lines. A list of replacements is now placed
7573 at the head of all of the source files, except those whose only change is
7574 to replace PERL_COMMAND in the very first #! line.
7576 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7577 messages on the queue, with a bottom-up merge sort, using code contributed
7578 by Michael Haardt. This should make operations like -bp somewhat faster on
7579 large queues. It won't affect queue runners, except when queue_run_in_order
7582 51. Installed eximstats 1.31 in the distribution.
7584 52. Added support for SRV lookups to the dnslookup router.
7586 53. If an ACL referred to $message_body or $message_body_end, the value was not
7587 reset for any messages that followed in the same SMTP session.
7589 54. The store-handling optimization for building very long strings was not
7590 differentiating between the different store pools. I don't think this
7591 actually made any difference in practice, but I've tidied it.
7593 55. While running the routers to verify a sender address, $sender_address
7594 was still set to the sender address. This is wrong, because when routing to
7595 send a bounce to the sender, it would be empty. Therefore, I have changed
7596 it so that, while verifying a sender address, $sender_address is set to <>.
7597 (There is no change to what happens when verifying a recipient address.)
7599 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7600 target A or AAAA records (if not already returned) without resetting the
7601 qualify_single or search_parents options of the DNS resolver. These are
7602 inappropriate in this case because the targets of MX and SRV records must
7603 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7604 target that, when qualified, matched something in the local domain. These
7605 two options are now turned off when doing these lookups.
7607 57. It seems that at least some releases of Reiserfs (which does not have the
7608 concept of a fixed number of inodes) returns zero and not -1 for the
7609 number of available inodes. This interacted badly with check_spool_inodes,
7610 which assumed that -1 was the "no such thing" setting. What I have done is
7611 to check that the total number of inodes is greater than zero before doing
7612 the test of how many are available.
7614 58. When a "warn" ACL statement has a log_message modifier, the message is
7615 remembered, and not repeated. This is to avoid a lot of repetition when a
7616 message has many recipients that cause the same warning to be written.
7617 However, Exim was preserving the list of already written lines for an
7618 entire SMTP session, which doesn't seem right. The memory is now reset if a
7619 new message is started.
7621 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7622 debugging output unless log_rewrite was also set.
7624 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7625 of (int)(handle) when we know that handle contains (void *)(-1).
7627 61. The Exim daemon panic-logs an error return when it closes the incoming
7628 connection. However "connection reset by peer" seems to be common, and
7629 isn't really an error worthy of noting specially, so that particular error
7632 62. When Exim is trying to find all the local interfaces, it used to panic and
7633 die if the ioctl to get the interface flags failed. However, it seems that
7634 on at least one OS (Solaris 9) it is possible to have an interface that is
7635 included in the list of interfaces, but for which you get a failure error
7636 for this call. This happens when the interface is not "plumbed" into a
7637 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7638 failure of the "get flags" call assumes that the interface is down.
7640 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7641 makes life easier for people who are doing arithmetic on fields extracted
7642 from dates, where you often get leading zeros that should not be
7643 interpreted as octal.
7645 64. Added qualify_domain to the redirect router, to override the global
7648 65. If a pathologically long header line contained very many addresses (the
7649 report of this problem mentioned 10 000) and each of them was rewritten,
7650 Exim could use up a very large amount of memory. (It kept on making new
7651 copies of the header line as it rewrote, and never released the old ones.)
7652 At the expense of a bit more processing, the header rewriting function has
7653 been changed so that it no longer eats memory in this way.
7655 66. The generation of the Received: header has been moved from the time that a
7656 message starts to be received, to the time that it finishes. The timestamp
7657 in the Received: header should now be very close to that of the <= log
7658 line. There are two side-effects of this change:
7660 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7661 logged header lines no longer include the local Received: line, because
7662 it has not yet been created. The same applies to a copy of the message
7663 that is returned to a non-SMTP sender when a message is rejected.
7665 (b) When a filter file is tested using -bf, no additional Received: header
7666 is added to the test message. After some thought, I decided that this
7669 This change does not affect the value of $received_for. It is still set
7670 after address rewriting, but before local_scan() is called.
7672 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7674 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7675 gave an unhelpful panic error message, and a defer error. I have managed to
7676 change this behaviour so that it now rejects any supplied certificate,
7677 which seems right, as the list of acceptable certificates is empty.
7679 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7680 gave an unhelpful defer error. I have not managed to make this reject any
7681 supplied certificates, but the error message it gives is "no certificate
7682 supplied", which is not helpful.
7684 70. exigrep's output now also includes lines that are not associated with any
7685 message, but which match the given pattern. Implemented by a patch from
7686 Martin Sluka, which also tidied up the Perl a bit.
7688 71. Recipient callout verification, like sender verification, was using <> in
7689 the MAIL FROM command. This isn't really the right thing, since the actual
7690 sender may affect whether the remote host accepts the recipient or not. I
7691 have changed it to use the actual sender in the callout; this means that
7692 the cache record is now keyed on a recipient/sender pair, not just the
7693 recipient address. There doesn't seem to be a real danger of callout loops,
7694 since a callout by the remote host to check the sender would use <>.
7695 [SEE ABOVE: changed after hitting problems.]
7697 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7698 temporary errors. However, in the case of such a code being given after
7699 the end of a data transmission (i.e. after ".") Exim was failing to write
7700 a retry record for the message. (Yes, there was some broken host that was
7701 actually sending 8xx at this point.)
7703 73. An unknown lookup type in a host list could cause Exim to panic-die when
7704 the list was checked. (An example that provoked this was putting <; in the
7705 middle of a list instead of at the start.) If this happened during a DATA
7706 ACL check, a -D file could be left lying around. This kind of configuration
7707 error no longer causes Exim to die; instead it causes a defer error. The
7708 incident is still logged to the main and panic logs.
7710 74. Buglet left over from Exim 3 conversion. The message "too many messages
7711 in one connection" was written to the rejectlog but not the mainlog, except
7712 when address rewriting (yes!) was being logged.
7714 75. Added write_rejectlog option.
7716 76. When a system filter was run not as root (that is, when system_filter_user
7717 was set), the values of the $n variables were not being returned to the
7718 main process; thus, they were not subsequently available in the $sn
7721 77. Added +return_path_on_delivery log selector.
7723 78. A connection timeout was being treated differently from recipients deferred
7724 when testing hosts_max_try with a message that was older than the host's
7725 retry timeout. (The host should not be counted, thus allowing all hosts to
7726 be tried at least once before bouncing.) This may have been the cause of an
7727 occasionally reported bug whereby a message would remain on the queue
7728 longer than the retry timeout, but would be bounced if a delivery was
7729 forced. I say "may" because I never totally pinned down the problem;
7730 setting up timeout/retry tests is difficult. See also the next item.
7732 79. The ultimate address timeout was not being applied to errors that involved
7733 a combination of host plus message (for example, a timeout on a MAIL
7734 command). When an address resolved to a number of possible hosts, and they
7735 were not all tried for each delivery (e.g. because of hosts_max_try), a
7736 message could remain on the queue longer than the retry timeout.
7738 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7741 81. Fixed an obscure SMTP outgoing bug which required at least the following
7742 conditions: (a) there was another message waiting for the same server;
7743 (b) the server returned 5xx to all RCPT commands in the first message so
7744 that the message was not completed; (c) the server dropped the connection
7745 or gave a negative response to the RSET that Exim sends to abort the
7746 transaction. The observed case was a dropped connection after DATA that had
7747 been sent in pipelining mode. That is, the server had advertised PIPELINING
7748 but was not implementing it correctly. The effect of the bug was incorrect
7749 behaviour, such as trying another host, and this could lead to a crash.
7755 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7756 and daemon.c were passed as pointers to ints; they should have been
7757 pointers to socklen_t variables (which are typically unsigned ints).
7759 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7762 3. Fixed a really odd bug that affected only the testing scheme; patching a
7763 certain fixed string in the binary changed the value of another string that
7764 happened to be identical to the end of the original first string.
7766 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7767 name", it returns that address as the IP address. On some operating
7768 systems (e.g. Solaris), it also passes back the IP address string as the
7769 "host name". However, on others (e.g. Linux), it passes back an empty
7770 string. Exim wasn't checking for this, and was changing the host name to an
7771 empty string, assuming it had been canonicalized.
7773 5. Although rare, it is permitted to have more than one PTR record for a given
7774 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7775 all the names associated with an address, because they do in Solaris.
7776 However, it seems that they do not in Linux for data that comes from the
7777 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7778 I found this out when I moved to a new Linux workstation and tried to run
7779 the Exim test suite.
7781 To get round this problem I have changed the code so that it now does its
7782 own call to the DNS to look up PTR records when searching for a host name.
7783 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7784 addresses that are only in /etc/hosts are still found.
7786 This behaviour is, however, controlled by an option called host_lookup_
7787 order, which defaults to "bydns:byaddr". If people want to use the other
7788 order, or indeed, just use one or the other means of lookup, they can
7789 specify it in this variable.
7791 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7792 some operating systems, this comes back from gethostbyaddr() as an empty
7793 string, and this is what Exim used to test for. However, it seems that in
7794 other systems, "." is yielded. Exim now tests for this case too.
7796 7. The values of check_spool_space and check_log_space are now held internally
7797 as a number of kilobytes instead of an absolute number of bytes. If a
7798 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7799 kilobyte. This means that much larger values can be stored.
7801 8. Exim monitor: an attempt to get the action menu when not actually pointing
7802 at a message produces an empty menu entitled "No message selected". This
7803 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7804 no entries in it ("Shell widget menu has zero width and/or height"). So I
7805 have added a single, blank menu entry in this case.
7807 9. Added ${quote_local_part.
7809 10. MIME decoding is now applied to the contents of Subject: header lines when
7812 11. Now that a reference to $sender_host_address automatically causes a reverse
7813 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7814 host lookup before query-style lookups in lists that might use this
7815 variable. This has therefore been abolished, and the "net-" prefix is no
7816 longer necessary for query-style lookups.
7818 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7819 have been a typo for LFLAGS, so it has been changed.
7821 13. The install script calls Exim with "-C /dev/null" in order to find the
7822 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7823 to be output. However, since Exim outputs its version number before the
7824 error, it didn't break the script. It just looked ugly. I fixed this by
7825 always allowing "-C /dev/null" if the caller is root.
7827 14. Ignore overlarge ACL variable number when reading spool file - insurance
7828 against a later release with more variables having written the file.
7830 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7831 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7832 this, as well as the form without the "IPv6" on the front.
7834 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7835 OS/Makefile-Darwin file.
7837 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7838 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7840 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7841 variable. However, some OS use ints for inodes. I've added cast to long int
7842 to get rid of the compiler warning.
7844 19. I had forgotten to lock out "/../" in configuration file names when
7845 ALT_CONFIG_PREFIX was set.
7847 20. Routers used for verification do not need to specify transports. However,
7848 if such a router generated a host list, and callout was configured, Exim
7849 crashed, because it could not find a port number from the (non-existent)
7850 transport. It now assumes port 25 in this circumstance.
7852 21. Added the -t option to exigrep.
7854 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7855 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7856 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7857 them is set, LOOKUP_LSEARCH is forced.
7859 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7861 24. Added sender and host information to the "rejected by local_scan()" log
7862 line; previously there was no indication of these.
7864 25. Added .include_if_exists.
7866 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7867 Linux. It turns out that not all file systems support this. Apparently some
7868 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7869 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7870 not supported on the file descriptor, is now ignored when Exim is trying to
7871 sync a directory. This applies only to Linux.
7873 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7875 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7876 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7879 29. Added support for maildirsize files from supplied patch (modified a bit).
7881 30. The use of :fail: followed by an empty string could lead Exim to respond to
7882 sender verification failures with (e.g.):
7884 550 Verification failed for <xxx>
7885 550 Sender verify failed
7887 where the first response line was missing the '-' that indicates it is not
7888 the final line of the response.
7890 31. The loop for finding the name of the user that called Exim had a hardwired
7891 limit of 10; it now uses the value of finduser_retries, which is used for
7892 all other user lookups.
7894 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7897 33. Exim was neglecting to zero errno before one call of strtol() when
7898 expanding a string and expecting an integer value. On some systems this
7899 resulted in spurious "integer overflow" errors. Also, it was casting the
7900 result into an int without checking.
7902 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7903 did not work. The code looks as if it has *never* worked, though it appears
7904 to have been documented since at least release 1.62. I have made it work.
7906 35. The "timeout_DNS" error in retry rules, also documented since at least
7907 1.62, also never worked. As it isn't clear exactly what this means, and
7908 clearly it isn't a major issue, I have abolished the feature by treating it
7909 as "timeout", and writing a warning to the main and panic logs.
7911 36. The display of retry rules for -brt wasn't always showing the error code
7914 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7915 timeout_connect_A, timeout_connect_MX.
7917 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7918 to the empty sender.
7920 39. The daemon was not analysing the content of -oX till after it had closed
7921 stderr and disconnected from the controlling terminal. This meant that any
7922 syntax errors were only noted on the panic log, and the return code from
7923 the command was 0. By re-arranging the code a little, I've made the
7924 decoding happen first, so such errors now appear on stderr, and the return
7925 code is 1. However, the actual setting up of the sockets still happens in
7926 the disconnected process, so errors there are still only recorded on the
7929 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7930 connections (as happens on some IP stacks) was logged at start up time as
7931 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7932 it from "IPv6 and IPv4", which means that two separate sockets are being
7935 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7936 says whether AF_INET or AF_INET6 was passed as an argument.
7938 42. Exiwhat output was messed up when time zones were included in log
7941 43. Exiwhat now gives more information about the daemon's listening ports,
7942 and whether -tls-on-connect was used.
7944 44. The "port" option of the smtp transport is now expanded.
7946 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7947 silently ignored. Now an error message is written to the main and panic
7950 46. There's a new ACL modifier called "logwrite" which writes to a log file
7951 as soon as it is encountered.
7953 47. Added $local_user_uid and $local_user_gid at routing time.
7955 48. Exim crashed when trying to verify a sender address that was being
7958 49. Exim was recognizing only a space character after ".include". It now also
7959 recognizes a tab character.
7961 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7962 extracting the relevant information from the specification. The man page no
7963 longer contains scrambled data for the -d option, and I've added a section
7964 at the front about calling Exim under different names.
7966 51. Added "extra_headers" argument to the "mail" command in filter files.
7968 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7971 53. Installed eximstats 1.29.
7973 54. Added transport_filter_timeout as a generic transport option.
7975 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7976 Cc: header lines. This was required by RFC 822, but it not required by RFC
7979 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7980 incoming messages that did not have them. Now it does so only if the
7981 message originates locally, that is, if there is no associated remote host
7982 address. When Resent- header lines are present, this applies to the Resent-
7983 lines rather than the non-Resent- lines.
7985 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7986 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7988 58. Messages for configuration errors now include the name of the main
7989 configuration file - useful now that there may be more than one file in a
7990 list (.included file names were always shown).
7992 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7993 for those rare installations that do not start the daemon as root or run it
7994 setuid root. I've cut out the call to initgroups() if the daemon is not
7997 60. The Exim user and group can now be bound into the binary as text strings
7998 that are looked up at the start of Exim's processing.
8000 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
8002 62. Added $mailstore_basename variable.
8004 63. Installed patch to sieve.c from Michael Haardt.
8006 64. When Exim failed to open the panic log after failing to open the main log,
8007 the original message it was trying to log was written to stderr and debug
8008 output, but if they were not available (the usual case in production), it
8009 was lost. Now it is written to syslog before the two lines that record the
8010 failures to open the logs.
8012 65. Users' Exim filters run in subprocesses under the user's uid. It is
8013 possible for a "deliver" command or an alias in a "personal" command to
8014 provoke an address rewrite. If logging of address rewriting is configured,
8015 this fails because the process is not running as root or exim. There may be
8016 a better way of dealing with this, but for the moment (because 4.30 needs
8017 to be released), I have disabled address rewrite logging when running a
8018 filter in a non-root, non-exim process.
8024 1. The buildconfig auxiliary program wasn't quoting the value set for
8025 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8026 not defined. This bug was masked in 4.22 by the effect that was fixed in
8029 2. Some messages that were rejected after a message id was allocated were
8030 shown as "incomplete" by exigrep. It no longer does this for messages that
8031 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8033 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8034 have allow_domain_literals set, the ID did not get logged in the <= line.
8035 Domain literals are now always recognized in Message-ID: header lines.
8037 4. The first argument for a ${extract expansion item is the key name or field
8038 number. Leading and trailing spaces in this item were not being ignored,
8039 causing some misleading effects.
8041 5. When deliver_drop_privilege was set, single queue runner processes started
8042 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8043 same command in the process it spins off) were not dropping privilege.
8045 6. When the daemon running as "exim" started a queue runner, it always
8046 re-executed Exim in the spun-off process. This is a waste of effort when
8047 deliver_drop_privilege is set. The new process now just calls the
8048 queue-runner function directly.
8054 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8057 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8058 ignored. Though the use of -oP was forcing the writing of a pid file, it
8059 was always written to the default place.
8061 3. If the message "no IP address found for host xxxx" is generated during
8062 incoming verification, it is now followed by identification of the incoming
8063 connection (so you can more easily find what provoked it).
8065 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8067 5. Added some features to "harden" Exim a bit more against certain attacks:
8069 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8070 be put in Local/Makefile. This is like the never_users runtime option,
8071 but it cannot be overridden. The default setting is "root".
8073 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8074 prefix string with which any file named in a -C command line option
8077 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8078 is retained for -C and -D only if the caller of Exim is root. Without
8079 it, the exim user may also use -C and -D and retain privilege.
8081 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8082 command line option is disabled.
8084 6. Macro names set by the -D option must start with an upper case letter, just
8085 like macro names defined in the configuration file.
8087 7. Added "dereference=" facility to LDAP.
8089 8. Two instances of the typo "uknown" in the source files are fixed.
8091 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8092 the Configure-Makefile script screwed up while processing it.
8094 10. Incorporated PCRE 4.4.
8096 11. The SMTP synchronization check was not operating right at the start of an
8097 SMTP session. For example, it could not catch a HELO sent before the client
8098 waited for the greeting. There is now a check for outstanding input at the
8099 point when the greeting is written. Because of the duplex, asynchronous
8100 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8101 way, but not yet received, when the check is performed.
8103 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8104 on TCP/IP sockets, because this apparently causes some broken clients to
8107 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8108 unchanged) from the Cygwin maintainer.
8110 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8111 was supported instead of testing for mbx. Effectively a typo.
8113 15. The spa authenticator server code was not checking that the input it
8114 received was valid base64.
8116 16. The debug output line for the "set" modifier in ACLs was not showing the
8117 name of the variable that was being set.
8119 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8121 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8122 lookup on its own. Something else was needed to trigger the lookup. For
8123 example, a match in host_lookup or the need for a host name in a host list.
8124 Now, if $sender_host_name is referenced and the host name has not yet been
8125 looked up, a lookup is performed. If the lookup fails, the variable remains
8126 empty, and $host_lookup_failed is set to "1".
8128 19. Added "eqi" as a case-independent comparison operator.
8130 20. The saslauthd authentication condition could segfault if neither service
8131 nor realm was specified.
8133 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8134 error message that was logged was misleading, and incoming SMTP
8135 connections were dropped. The message is now more accurate, and temporary
8136 errors are given to SMTP connections.
8138 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8139 (except RSET) with a 421 error, until QUIT is received. However, it was
8140 failing to send a response to QUIT.
8142 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8143 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8144 ACL is now run after the helo_try_verify_hosts code.
8146 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8147 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8148 case-independent, so other case variants are also recognized). Apparently
8149 some systems use these upper case variants.
8151 25. If more than two messages were waiting for the same host, and a transport
8152 filter was specified for the transport, Exim sent two messages over the
8153 same TCP/IP connection, and then failed with "socket operation on non-
8154 socket" when it tried to send the third.
8156 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8158 27. The extern definition of crypt16() in expand.c was not being excluded when
8159 the OS had its own crypt16() function.
8161 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8162 as a preferred synonym for return_size_limit, both as an option and as an
8165 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8167 30. Changed the default configuration ACL to relax the local part checking rule
8168 for addresses that are not in any local domains. For these addresses,
8169 slashes and pipe symbols are allowed within local parts, but the sequence
8170 /../ is explicitly forbidden.
8172 31. SPA server authentication was not clearing the challenge buffer before
8175 32. log_message in a "warn" ACL statement was writing to the reject log as
8176 well as to the main log, which contradicts the documentation and doesn't
8177 seem right (because no rejection is happening). So I have stopped it.
8179 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8180 However, I am unable to do any testing of this.
8182 34. Fixed an infelicity in the appendfile transport. When checking directories
8183 for a mailbox, to see if any needed to be created, it was accidentally
8184 using path names with one or more superfluous leading slashes; tracing
8185 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8187 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8188 contents are added to the log line that is written for every discarded
8189 recipient. (Previously a log_message setting was ignored.)
8191 36. The ${quote: operator now quotes the string if it is empty.
8193 37. The install script runs exim in order to find its version number. If for
8194 some reason other than non-existence or emptiness, which it checks, it
8195 could not run './exim', it was installing it with an empty version number,
8196 i.e. as "exim-". This error state is now caught, and the installation is
8199 38. An argument was missing from the function that creates an error message
8200 when Exim fails to connect to the socket for saslauthd authentication.
8201 This could cause Exim to crash, or give a corrupted message.
8203 39. Added isip, isip4, and isip6 to ${if conditions.
8205 40. The ACL variables $acl_xx are now saved with the message, and can be
8206 accessed later in routers, transports, and filters.
8208 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8209 strings in the file are not string-expanded.
8211 42. If a MAIL command specified a SIZE value that was too large to fit into an
8212 int variable, the check against message_size_limit failed. Such values are
8213 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8214 day this will have to be increased, but I don't think I want to be around
8215 when emails are that large.
8222 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8223 iconv() is not standard in FreeBSD.
8225 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8226 IPv6 enabled. The observed symptom was a segmentation fault on return from
8227 the function os_common_find_running_interfaces() in src/os.c.
8229 3. In the check_special_case() function in daemon.c I had used "errno" as an
8230 argument name, which causes warnings on some systems. This was basically a
8231 typo, since it was named "eno" in the comments!
8233 4. The code that waits for the clock to tick (at a resolution of some fraction
8234 of a second) so as to ensure message-id uniqueness was always waiting for
8235 at least one whole tick, when it could have waited for less. [This is
8236 almost certainly not relevant at current processor speeds, where it is
8237 unlikely to ever wait at all. But we try to future-proof.]
8239 5. The function that sleeps for a time interval that includes fractions of a
8240 second contained a race. It did not block SIGALRM between setting the
8241 timer, and suspending (a couple of lines later). If the interval was short
8242 and the sigsuspend() was delayed until after it had expired, the suspension
8243 never ended. On busy systems this could lead to processes getting stuck for
8246 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8247 process, before it forks any delivery processes. The open lookup caching
8248 mechanism meant that the open file or database connection was passed into
8249 the delivery process. The problem was that delivery processes always tidy
8250 up cached lookup data. This could cause a problem for the next delivery
8251 process started by the queue runner, because the external queue runner
8252 process does not know about the closure. So the next delivery process
8253 still has data in the lookup cache. In the case of a file lookup, there was
8254 no problem because closing a file descriptor in a subprocess doesn't affect
8255 the parent. However, if the lookup was caching a connection to a database,
8256 the connection was closed, and the second delivery process was likely to
8257 see errors such as "PGSQL: query failed: server closed the connection
8258 unexpectedly". The problem has been fixed by closing all cached lookups
8259 in a queue runner before running a delivery process.
8261 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8262 seem to have the "const" qualifier which it has on other OS. I've
8265 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8266 *of the same type* (client or server) with the same public name that an
8267 error should be diagnosed.
8269 9. When Exim looked up a host name for an IP address, but failed to find the
8270 original IP address when looking up the host name (a safety check), it
8271 output the message "<ip address> does not match any IP for NULL", which was
8272 confusing, to say the least. The bug was that the host name should have
8273 appeared instead of "NULL".
8275 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8276 user that is built into the binary, and the -C or -D options is used, root
8277 privilege is dropped before the configuration file is read. In addition,
8278 logging is switched to stderr instead of the normal log files. If the
8279 configuration then re-defines the Exim user, the unprivileged environment
8280 is probably not what is expected, so Exim logs a panic warning message (but
8283 However, if deliver_drop_privilege is set, the unprivileged state may well
8284 be exactly what is intended, so the warning has been cut out in that case,
8285 and Exim is allowed to try to write to its normal log files.
8291 1. smtp_return_error_details was not giving details for temporary sender
8292 or receiver verification errors.
8294 2. Diagnose a configuration error if two authenticators have the same public
8297 3. Exim used not to create the message log file for a message until the first
8298 delivery attempt. This could be confusing when incoming messages were held
8299 for policy or load reasons. The message log file is now created at the time
8300 the message is received, and an initial "Received" line is written to it.
8302 4. The automatically generated man page for command line options had a minor
8303 bug that caused no ill effects; however, a more serious problem was that
8304 the procedure for building the man page automatically didn't always
8305 operate. Consequently, release 4.20 contains an out-of-date version. This
8306 shouldn't happen again.
8308 5. When building Exim with embedded Perl support, the script that builds the
8309 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8310 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8312 6. The freeze_tell option was not being used for messages that were frozen on
8313 arrival, either by an ACL or by local_scan().
8315 7. Added the smtp_incomplete_transaction log selector.
8317 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8318 was accepting AUTH without a new EHLO.
8320 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8321 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8324 10. Logging of TCP/IP connections (when configured) now happens in the main
8325 daemon process instead of the child process, so that the TCP/IP connection
8326 count is more accurate (but it can never be perfect).
8328 11. The use of "drop" in a nested ACL was not being handled correctly in the
8329 outer ACL. Now, if condition failure induced by the nested "drop" causes
8330 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8331 or "require"), the connection is dropped.
8333 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8334 that yield "discard" can now be used with an "accept" or a "discard" verb,
8335 but an error is generated for any others (because I can't see a useful way
8336 to define what should happen).
8338 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8339 are now processed in the same way as lines in the Exim configuration file.
8340 In particular, continuation lines are supported.
8342 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8344 15. Added -ti meaning -t -i.
8346 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8347 domains, and warn by logging if others are found.
8349 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8350 returned from GIFCONF when Exim is trying to find the list of interfaces on
8351 a host. The code in os.c has been modified to copy each ifreq to an aligned
8352 structure in all cases.
8354 Also, in some cases, the returned ifreq's were being copied to a 'struct
8355 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8356 means the last couple of bytes of an IPv6 address could be chopped if the
8357 ifreq contained only a normal sockaddr (14 bytes storage).
8359 18. Named domain lists were not supported in the hosts_treat_as_local option.
8360 An entry such as +xxxx was not recognized, and was treated as a literal
8363 19. Ensure that header lines added by a DATA ACL are included in the reject log
8364 if the ACL subsequently rejects the message.
8366 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8367 MD5 (which is deprecated).
8369 21. When testing a filter file using -bf, Exim was writing a message when it
8370 took the sender from a "From " line in the message, but it was not doing so
8371 when it took $return_path from a Return-Path: header line. It now does.
8373 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8374 with a valid header line field name (a series of printing characters
8375 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8377 23. Changed "disc" in the source to "disk" to conform to the documentation and
8378 the book and for uniformity.
8380 24. Ignore Sendmail's -Ooption=value command line item.
8382 25. When execve() failed while trying to run a command in a pipe transport,
8383 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8384 could be confused with a return value of 69 from the command itself. This
8385 has been changed to 127, the value the shell returns if it is asked to run
8386 a non-existent command. The wording for the related log line suggests a
8387 non-existent command as the problem.
8389 26. If received_header_text expands to an empty string, do not add a Received:
8390 header line to the message. (Well, it adds a token one on the spool, but
8391 marks it "old" so that it doesn't get used or transmitted.)
8393 27. Installed eximstats 1.28 (addition of -nt option).
8395 28. There was no check for failure on the call to getsockname() in the daemon
8396 code. This can fail if there is a shortage of resources on the system, with
8397 ENOMEM, for example. A temporary error is now given on failure.
8399 29. Contrary to the C standard, it seems that in some environments, the
8400 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8401 program. Exim now does this explicitly; it affects the formatting of
8402 timestamps using strftime().
8404 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8405 complaints. I've now initialized all the variables, to avoid this.
8407 32. Header lines added by a system filter were not being "seen" during
8408 transport-time rewrites.
8410 33. The info_callback() function passed to OpenSSL is set up with type void
8411 (*)(SSL *, int, int), as described somewhere. However, when calling the
8412 function (actually a macro) that sets it up, the type void(*)() is
8413 expected. I've put in a cast to prevent warnings from picky compilers.
8415 34. If a DNS black list lookup found a CNAME record, but there were no A
8416 records associated with the domain it pointed at, Exim crashed.
8418 35. If a DNS black list lookup returned more than one A record, Exim ignored
8419 all but the first. It now scans all returned addresses if a particular IP
8420 value is being sought. In this situation, the contents of the
8421 $dnslist_value variable are a list of all the addresses, separated by a
8424 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8425 to accept a host name and all its aliases if the forward lookup for any of
8426 them yielded the IP address of the incoming connection. Now it accepts only
8427 those names whose forward lookup yields the correct IP address. Any other
8428 names are discarded. This closes a loophole whereby a rogue DNS
8429 administrator could create reverse DNS records to break through a
8430 wildcarded host restriction in an ACL.
8432 37. If a user filter or a system filter that ran in a subprocess used any of
8433 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8434 the wrong values were passed to the pipe command ($thisaddress had the
8435 value of $0, $0 had the value of $1, etc). This bug was introduced by
8436 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8438 38. Improved the line breaking for long SMTP error messages from ACLs.
8439 Previously, if there was no break point between 40 and 75 characters, Exim
8440 left the rest of the message alone. Two changes have been made: (a) I've
8441 reduced the minimum length to 35 characters; (b) if it can't find a break
8442 point between 35 and 75 characters, it looks ahead and uses the first one
8443 that it finds. This may give the occasional overlong line, but at least the
8444 remaining text gets split now.
8446 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8447 file descriptors might be low, and that setting 1000 would always raise it.
8448 It turns out that in some environments, the limit is already over 1000 and
8449 that lowering it causes trouble. So now Exim takes care not to decrease it.
8451 40. When delivering a message, the value of $return_path is set to $sender_
8452 address at the start of routing (routers may change the value). By an
8453 oversight, this default was not being set up when an address was tested by
8454 -bt or -bv, which affected the outcome if any router or filter referred to
8457 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8458 log only when "message" or "log_message" are set. However, if one of the
8459 conditions was an address verification, or a call to a nested ACL, the
8460 messages generated by the underlying test were being passed through. This
8461 no longer happens. The underlying message is available in $acl_verify_
8462 message for both "message" and "log_message" expansions, so it can be
8463 passed through if needed.
8465 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8466 new expansion $bh_ to give the encoded byte string without charset
8467 translation. Translation happens only if iconv() is available; HAVE_ICONV
8468 indicates this at build time. HEADERS_CHARSET gives the charset to
8469 translate to; headers_charset can change it in the configuration, and
8470 "headers charset" can change it in an individual filter file.
8472 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8473 that creates RFC 2047 encoded "words" labels them as that charset instead
8474 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8475 expansion operator; (ii) when Exim creates a From: line for a local
8476 message; (iii) when a header line is rewritten to include a "phrase" part.
8478 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8479 buggy, causing it to skip the first lines of messages whose message ID
8480 ended in 'D'. This would not have bitten before Exim release 4.14, because
8481 message IDs were unlikely to end in 'D' before then. The effect was to have
8482 incorrect size information for certain domains.
8484 45. #include "config.h" was missing at the start of the crypt16.c module. This
8485 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8488 46. If there was a timeout during a "random" callout check, Exim treated it as
8489 a failure of the random address, and carried on sending RSET and the real
8490 address. If the delay was just some slowness somewhere, the response to the
8491 original RCPT would be taken as a response to RSET and so on, causing
8492 mayhem of various kinds.
8494 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8495 when I implemented it. It didn't allow for the fact that some option values
8496 may legitimately be negative (e.g. size_addition), and it didn't even do
8497 the right test for positive values.
8499 48. Domain names in DNS records are case-independent. Exim always looks them up
8500 in lower case. Some resolvers return domain names in exactly the case they
8501 appear in the zone file, that is, they may contain uppercase letters. Not
8502 all resolvers do this - some return always lower case. Exim was treating a
8503 change of case by a resolver as a change of domain, similar to a widening
8504 of a domain abbreviation. This triggered its re-routing code and so it was
8505 trying to route what was effectively the same domain again. This normally
8506 caused routing to fail (because the router wouldn't handle the domain
8507 twice). Now Exim checks for this case specially, and just changes the
8508 casing of the domain that it ultimately uses when it transmits the message
8511 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8514 50. If a filter generated a file delivery with a non-absolute name (possible if
8515 no home directory exists for the router), the forbid_file option was not
8518 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8519 the existing equality matching.
8521 52. Exim was using ints instead of ino_t variables in some places where it was
8522 dealing with inode numbers.
8524 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8525 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8526 called TMPDIR, and if it finds it is different, it changes its value.
8528 54. The smtp_printf() function is now made available to local_scan() so
8529 additional output lines can be written before returning. There is also an
8530 smtp_fflush() function to enable the detection of a dropped connection.
8531 The variables smtp_input and smtp_batched_input are exported to
8534 55. Changed the default runtime configuration: the message "Unknown user"
8535 has been removed from the ACL, and instead placed on the localuser router,
8536 using the cannot_route_message feature. This means that any verification
8537 failures that generate their own messages won't get overridden. Similarly,
8538 the "Unrouteable address" message that was in the ACL for unverifiable
8539 relay addresses has also been removed.
8541 56. Added hosts_avoid_esmtp to the smtp transport.
8543 57. The exicyclog script was not checking for the esoteric option
8544 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8545 will work only if exicyclog is run under the appropriate euid.
8547 58. Following a discussion on the list, the rules by which Exim recognises line
8548 endings on incoming messages have been changed. The -dropcr and drop_cr
8549 options are now no-ops, retained only for backwards compatibility. The
8550 following line terminators are recognized: LF CRLF CR. However, special
8551 processing applies to CR:
8553 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8554 nor a local message in the state where . is a terminator.
8556 (ii) If a bare CR is encountered in a header line, an extra space is added
8557 after the line terminator so as not to end the header. The reasoning
8558 behind this is that bare CRs in header lines are most likely either
8559 to be mistakes, or people trying to play silly games.
8561 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8562 was being incorrectly given as 18 bytes larger than it should have been.
8563 This is a VOB (very old bug).
8565 60. This may never have affected anything current, but just in case it has:
8566 When the local host is found other than at the start of a list of hosts,
8567 the local host, those with the same MX, and any that follow, are discarded.
8568 When the list in question was part of a longer list of hosts, the following
8569 hosts (not currently being processed) were also being discarded. This no
8570 longer happens. I'm not sure if this situation could ever has previously
8573 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8576 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8577 header. This is something that is recommended in a new Internet Draft, and
8578 is something that is documented as being done by Sendmail. There are two
8579 possible values. For messages generated by the autoreply transport, Exim
8582 Auto-Submitted: auto-replied
8584 whereas for all other generated messages (e.g. bounces) it adds
8586 Auto-Submitted: auto-generated
8588 63. The "personal" condition in filters now includes a test for the
8589 Auto-Submitted: header. If it contains the string "auto-" the message it
8590 not considered personal.
8592 64. Added rcpt_include_affixes as a generic transport option.
8594 65. Added queue_only_override (default true).
8596 66. Added the syslog_duplication option.
8598 67. If what should have been the first header line of a message consisted of
8599 a space followed by a colon, Exim was mis-interpreting it as a header line.
8600 It isn't of course - it is syntactically invalid and should therefore be
8601 treated as the start of the message body. The misbehaviour could have
8602 caused a number of strange effects, including loss of data in subsequent
8603 header lines, and spool format errors.
8605 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8606 client host had authenticated. This control can now be exercised by an ACL
8607 for more flexibility.
8609 69. By default, callouts do not happen when testing with -bh. There is now a
8610 variant, -bhc, which does actually run the callout code, including
8611 consulting and updating the callout cache.
8613 70. Added support for saslauthd authentication, courtesy of Alexander
8616 71. If statvfs() failed on the spool or log directories while checking their
8617 size for availability, Exim confusingly gave the error "space shortage".
8618 Furthermore, in debugging mode it crashed with a floating point exception.
8619 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8620 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8621 serious problem, Exim now writes to the main and panic logs when this
8622 happens, with details of the failure. It then refuses to accept the
8623 incoming message, giving the message "spool directory problem" or "log
8624 directory problem" with a 421 code for SMTP messages.
8626 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8627 0, 1, and 2 exist, because some OS complain for execs without them (see
8628 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8629 descriptors. However, the code omitted to check that the open succeeded,
8630 causing mysterious errors if for some reason the permissions on /dev/null
8631 got screwed. Now Exim writes a message to the main and panic logs, and
8632 bombs out if it can't open /dev/null.
8634 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8635 interact so that it is all more flexible. It is supposed to remain
8636 backwards compatible. Also added extra_local_interfaces.
8638 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8639 to bomb out with an assertion failure - to the client this appears as a
8640 connection drop. This problem occurs in the part of the code that was taken
8641 from the Samba project. Fortunately, the assertion is in a very simple
8642 function, so I have fixed this by reproducing the function inline in the
8643 one place where it is called, and arranging for authentication to fail
8644 instead of killing the process with assert().
8646 75. The SPA client code was not working when the server requested OEM rather
8647 than Unicode encoding.
8649 76. Added code to make require_files with a specific uid setting more usable in
8650 the case where statting the file as root fails - usually a non-root-mounted
8651 NFS file system. When this happens and the failure is EACCES, Exim now
8652 forks a subprocess and does the per-uid checking as the relevant uid.
8654 77. Added process_log_path.
8656 78. If log_file_path was not explicitly set, a setting of check_log_space or
8657 check_log_inodes was ignored.
8659 79. If a space check for the spool or log partitions fails, the incident is now
8660 logged. Of course, in the latter case the data may get lost...
8662 80. Added the %p formatting code to string_format() so that it can be used to
8663 print addresses in debug_print(). Adjusted all the address printing in the
8664 debugging in store.c to use %p rather than %d.
8666 81. There was a concern that a line of code in smtp_in.c could overflow a
8667 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8668 initially expressed, the concern was not well-founded, because trailing
8669 spaces are removed early. However, if the trailing spaces were followed by
8670 a NULL, they did not get removed, so the overflow was possible. Two fixes
8673 (a) I re-wrote the offending code in a cleaner fashion.
8674 (b) If an incoming SMTP command contains a NULL character, it is rejected
8677 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8678 runs initgroups(), so that if the Exim user is in any additional groups,
8679 they will be used during message reception.
8685 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob