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.
34 JH/07 Bug 3106: Fix coding in SPA authenticator. A macro argument was not
35 properly parenthesized, resulting in a logic error. While the simple
36 fix was provided by Andrew Aitchison, the over-large code block resulting
37 from this macro made me want to replace it with a real function so more
38 extensive rework becamse needed.
40 JH/08 The output of "exim -bV" now includes lookup types built as dynamic-load
43 JH/09 Not a change, but worthy of note: There is no test coverage of the
44 heimdall-gssapi authenticator driver. It does build, though with (on at
45 least one platform) library version conflicts with the gsasl auth
46 driver). Confidence in its operation is lacking.
51 JH/01 Support list of dkim results in the dkim_status ACL condition, making
52 it more usable in the data ACL.
54 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
55 Previously This was only logged, on the assumption that errors would be
56 seen for a previous fflush(). However, a fuse filesystem has been
57 reported as showing this an error for the fclose(). The spool is now in
58 an uncertain state, and we have logged and responded acceptance. Change
59 this to respond with a temp-reject, wipe spoolfiles, and log the error
62 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
63 during a recipient verify callout, a QUIT command was attempted on the
64 now-closed callout channel, causing a paniclog entry.
66 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
67 a connection_reject log_selector, under tls_on_connect. Previously
68 with this combination, when the connect ACL rejected, a spurious
69 paniclog entry was made.
71 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
72 of loadbalancer-detection for resumption, in 4.96 - which tries to
73 use the EHLO response. SMTPS does not have one at the time it is starting
74 TLS. Change the default for the smtp transport host_name_extract option
75 to be a static string, for TLS-on-connect cases; meaning that resumption
76 will always be attempted (unless deliberately overriden).
78 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
79 chunk-separator specification. This was broken by hardening introduced
82 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
83 included the -H with the id; this also messed up exiqgrep.
85 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
86 was not properly skipped and empty elements would cause mis-parsing.
87 Tighten parsing of DKIM header records. Previously, all but lowercase
88 alpha chars would be ignored in potential tag names.
90 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
91 being searched. Previously we only had one for IPv4 addresses. Per the
92 documentation, the error results by default in a no-match result for the
93 list. It is logged if the unknown_in_list log_selector is used.
95 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
96 the routing operation. Previously it would silently stop routing the
99 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
100 info-request event close in time to a scheduled run timer could result in
101 the latter being missed, and no further queue scheduled runs being
102 initiated. This ouwld be more likely on high-load systems.
104 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
105 LF-only mode (as detected from the first header line). Previously we did
106 accept that in (normal) CRLF mode; this has been raised as a possible
107 attack scenario (under the name "smtp smuggling").
109 JH/13 Add an fdatasync call for the received message data file in spool, before
110 loggging reception and sending the SMTP ack. Previously we only flushed
111 the stdio buffer so there was still the possibility of a disk error.
113 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
114 address. Previously, for the last address in a header line (commonly
115 there is only one) the terminating newline was part of the logged
118 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
119 header, when parsing for address-qualification. Previously one was only
120 written if there were rewrite rules.
122 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
125 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
126 the multiple-queue-runners facility for 4.97 broke this, giving only a
127 one-time run of the queue.
129 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
132 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
133 TLS session resulted in a forced-fail, a misleading error was logged for
134 the expansino of tls_certificates. This would affect the common case of
135 that option being set (main-section options) but not having any variable
136 parts. It could also potentially affect tls_privatekeys. The underlyding
137 coding errors go back to 4.90 but were only exposed in 4.97.
139 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
140 pcre2 library starting allocating 20kB rather than 112 bytes per match
141 call, which broke the 2GB total limitation on Exim's memory management
142 when a user had over 104207 messages stored and the appendfile
143 maildir_quota_directory_regex option is in use. Release the allocated
144 memory every thosand files to avoid this.
145 The same issue arises with the ACL regex condition, which is applied
146 to every line of a received message.
148 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
149 which all recipients had been handled (itself an issue) a null-pointer
150 deref was done on trying to write a retry record. Fix that by counting
151 the outstanding recipients before trying to transmit the message.
152 The situation arose for a second MX try within a transport run, when the
153 first had perm-rejected a recipient (the only one for the connection, in
154 the case seen) during pipelining, and then closed the TCP connection.
155 The transport classified that as an I/O error, leaving the message
156 outstanding but having marked up the recipient as dealt-with. It then
157 tried another MX because of the I/O error. Fix this by converting the
158 message-level status to ok if there was a close but all recipients were
159 dealt with. Thanks to Wolfgand Breyha for debug runs.
161 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
162 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
164 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
166 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
167 option specified a fixed address, later rewriting on that address would
168 trip on the configuration data being readonly. Instead of modifying
169 in-place, copy data. Found and fixed by Peter Benie.
171 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
172 data a null pointer was followed. Find and testcase by Sebastian Bugge.
174 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
175 decimal 127 chars were not encoded, and lowercase hex was used for
176 encoded values. Outstanding since at least 1999.
178 JH/27 Fix crash in logging. When a message with a large number of recipients
179 had been received, and logging of recipients is enabled, the buffer used
180 for logging could reach limit. A read using a null pointer would then
181 be done, resulting in a crash of the receiving process before an SMTP
182 ACK for the message was returned to the sending system. Duplicate
183 messages were created as a result.
184 Find and debug help by Mateusz Krawczyk
186 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
187 DB, wrapping transport record bare-ip "host names" and ipv6
188 "host addresses" in square-brackets. This makes the parsing that
189 exinext does more reliable.
191 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
194 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
196 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
197 ipv6 addresses for the sender. Previously the uncompressed form was used,
198 and if used in textual form this would result in behavior difference
201 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
202 now classed as a protocol error and subject to smtp_max_synprot_errors.
204 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
205 ".." and has following characters.
207 JH/34 Fix delivery ordering for 2-phase queue run combined with
210 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
211 Previously the $mime_filename variable would have an incorrect value.
212 While in the code, extend coverage to name= which previously was only
213 supported for single parameters, despite also filling in $mime_filename.
219 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
220 SMTP connection" log lines.
222 JH/02 Option default value updates:
223 - queue_fast_ramp (main) true (was false)
224 - remote_max_parallel (main) 4 (was 2)
226 JH/03 Cache static regex pattern compilations, for use by ACLs.
228 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
229 Make the rewrite never match and keep the logging. Trust the
230 admin to be using verify=header-syntax (to actually reject the message).
232 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
233 (under Linux) we watch the dir containing the final file; previously
234 it would be the dir with the first symlink. We still do not monitor
237 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
238 dn_expand() is happy to pass them through.
240 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
241 the file with the proof had an unchanged name, the new proof(s) were
242 loaded on top of the old ones (and nover used; the old ones were stapled).
244 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
245 more than one message arrived in a single connection a reference from
246 the earlier message could be re-used. Often a sigsegv resulted.
247 These variables were introduced in Exim 4.87.
248 Debug help from Graeme Fowler.
250 JH/09 Fix ${filter } for conditions that modify $value. Previously the
251 modified version would be used in construction the result, and a memory
254 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
255 Find and fix by Jasen Betts.
257 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
258 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
259 the systemwide configuration to override the Exim config.
261 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
262 API changes in libopendmarc.
264 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
265 pid 1, in the normal "background daemon" mode, having to drop process-
266 group leadership also lost track of needing to create listener sockets.
268 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
269 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
271 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
272 a capture group which obtained no text (eg. "(abc)*" matching zero
273 occurrences) could cause a segfault if the corresponding $<n> was
276 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
277 included a close-brace character (eg. it itself used an expansion) an
280 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
281 starting TLS. Previously it was after, meaning that attackers on such
282 ports had to be screened using the host_reject_connection main config
283 option. The new sequence aligns better with the STARTTLS behaviour, and
284 permits defences against crypto-processing load attacks, even though it
285 is strictly an incompatible change.
286 Also, avoid sending any SMTP fail response for either the connect ACL
287 or host_reject_connection, for TLS-on-connect ports.
289 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
290 Previously this was not permitted, but it makes reasonable sense.
291 While there, restore a restriction on using it from a connect ACL; given
292 the change JH/16 it could only return false (and before 4.91 was not
295 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
296 was exactly sized compared to the log buffer, a crash occurred with the
297 misleading message "bad memory reference; pool not found".
298 Found and traced by Jasen Betts.
300 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
301 dns_again_means_nonexist included an element causing a DNS lookup which
302 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
303 included (though probably not limited to) a process crash from stack
304 memory limit, or from excessive open files. Replace this with a paniclog
305 whine (as this is likely a configuration error), and returning
308 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
309 this always failed, probably leading to the usual downgrade to in-clear
312 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
313 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
314 to not checking that list for these lookups.
316 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
319 JH/23 Fix crash in string expansions. Previously, if an empty variable was
320 immediately followed by an expansion operator, a null-indirection read
321 was done, killing the process.
323 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
324 include an SMTP response string which is longer than that supported
325 by the delivering transport. Alleviate by wrapping such lines before
328 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
329 chars (RFC limit). Previously a limit of 12 items was made, which with
330 a not-impossible References: in the message being bounced could still
331 be over-large and get stopped in the transport.
333 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
334 close. Previously a bare socket close was done.
336 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
339 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
340 message being considered for delivery was already being handled by
341 another process, and having an SMTP connection already open, the function
342 to close it tried to use an uninitialized variable. This would afftect
343 high-volume sites more, especially when running mailing-list-style loads.
344 Pollution of logs was the major effect, as the other process delivered
345 the message. Found and partly investigated by Graeme Fowler.
347 JH/29 Change format of the internal ID used for message identification. The old
348 version only supported 31 bits for a PID element; the new 64 (on systems
349 which can use Base-62 encoding, which is all currently supported ones
350 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
351 and must use Base-36). The new ID is 23 characters rather than 16, and is
352 visible in various places - notably logs, message headers, and spool file
353 names. Various of the ancillary utilities also have to know the format.
354 As well as the expanded PID portion, the sub-second part of the time
355 recorded in the ID is expanded to support finer precision. Theoretically
356 this permits a receive rate from a single comms channel of better than the
358 The major timestamp part of the ID is not changed; at 6 characters it is
359 usable until about year 3700.
360 Updating from previously releases is fully supported: old-format spool
361 files are still usable, and the utilities support both formats. New
362 message will use the new format. The one hints-DB file type which uses
363 message-IDs (the transport wait- DB) will be discarded if an old-format ID
364 is seen; new ones will be built with only new-format IDs.
365 Optionally, a utility can be used to convert spool files from old to new,
366 but this is only an efficiency measure not a requirement for operation
367 Downgrading from new to old requires running a provided utility, having
368 first stopped all operations. This will convert any spool files from new
369 back to old (losing time-precision and PID information) and remove any
370 wait- hints databases.
372 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
373 we treated them as item separators when parsing for a list item, but they
374 need to be protected by the doublequotes. While there, add handling for
377 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
378 Found and fixed by Jasen Betts. No testcase for this as my usual text
379 editor insists on emitting only valid UTF-8.
381 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
382 a null-indirection SIGSEGV for the receive process.
384 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
385 -bh use. Internal checking would spot this and take a panic.
387 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
388 In 4.96 this would expand to empty.
390 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
391 certificate. Find and fix by Andreas Metzler.
393 JH/36 Add ARC info to DMARC hostory records.
395 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
396 or fakedefer. Previously the sender could discover that the message
397 had in fact been accepted.
399 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
400 sequences. Previously the input was not noted as being tainted; notably
401 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
402 bad coding of authenticators.
404 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
405 and ${tr...}. Found and diagnosed by Heiko Schlichting.
407 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
408 could be triggered by externally-supplied input. Found by Trend Micro.
411 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
412 be triggered by externally-controlled input. Found by Trend Micro.
415 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
416 be triggered by externally-controlled input. Found by Trend Micro.
419 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
420 Make the rewrite never match and keep the logging. Trust the
421 admin to be using verify=header-syntax (to actually reject the message).
423 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
426 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
432 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
433 after reception to before a subsequent reception. This should
434 mean slightly faster delivery, and also confirmation of reception
437 JH/02 Move from using the pcre library to pcre2. The former is no longer
438 being developed or supported (by the original developer).
440 JH/03 Constification work in the filters module required a major version
441 bump for the local-scan API. Specifically, the "headers_charset"
442 global which is visible via the API is now const and may therefore
443 not be modified by local-scan code.
445 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
446 sendfile() didi not account for the way the ClamAV driver code called it.
448 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
449 time check was being done for every character; replace that with one
452 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
453 sent was prefixed with a length byte.
455 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
456 RFC 5321. Previously Dovecot (at least) would log errors during
459 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
460 in 4.61 without a reason logged. Binaries will be bigger, which might
461 matter on diskspace-constrained systems, but debug is easier.
463 JH/09 Fix macro-definition during "-be" expansion testing. The move to
464 write-protected store for macros had not accounted for these runtime
465 additions; fix by removing this protection for "-be" mode.
467 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
468 handing out large-numbered file descriptors, violating the usual Unix
469 assumption (and required by Posix) that the lowest possible number will be
470 allocated by the kernel when a new one is needed. In the daemon, and any
471 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
472 are not useable for FD_SET() [and hence select()] and overwrite the stack.
473 Assorted crashes happen.
475 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
476 main-section options or in a connect ACL, the value from the first ever
477 connection was never replaced for subsequent connections. Found by
480 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
481 though only once PCRE2 was introduced: the memory accounting used under
482 debug offset allocations by an int, giving a hard trap in early startup.
483 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
485 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
486 with underbars is given. The write-protection of configuration introduced
487 in 4.95 trapped when normalisation was applied to an option not needing
490 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
492 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
493 failing to close the certificates directory, every hour or any time it
496 JH/16 Debugging initiated by an ACL control now continues through into routing
497 and transport processes. Previously debugging stopped any time Exim
498 re-execs, or for processing a queued message.
500 JH/17 The "expand" debug selector now gives more detail, specifically on the
501 result of expansion operators and items.
503 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
504 bad comparison between the option value and the name of the file to
505 be included was done, and a mismatch was wrongly identified.
506 4.88 to 4.95 are affected.
508 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
510 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
511 supplied as the db file-pair basename. Previously, if a directory
512 path was given, for example via the autoreply "once" option, the DB
513 file.pag and file.dir files would be created in that directory's
516 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
517 "taint" log_selector. These were previously deprecated.
519 JH/22 Fix static address-list lookups to properly return the matched item.
520 Previously only the domain part was returned.
522 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
523 the call into OpenSSL to send a TLS Close was being repeated; this
524 resulted in the library waiting for the peer's Close. If that was never
525 sent we waited forever. Fix by tracking send calls.
527 JH/24 The ${run} expansion item now expands its command string elements after
528 splitting. Previously it was before; the new ordering makes handling
529 zero-length arguments simpler. The old ordering can be obtained by
530 appending a new option "preexpand", after a comma, to the "run".
532 JH/25 Taint-check exec arguments for transport-initiated external processes.
533 Previously, tainted values could be used. This affects "pipe", "lmtp" and
534 "queryprogram" transport, transport-filter, and ETRN commands.
535 The ${run} expansion is also affected: in "preexpand" mode no part of
536 the command line may be tainted, in default mode the executable name
539 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
540 the the facility was not passed across execs, and only the first message
541 passed over a connection could use BDAT; any further ones using DATA.
543 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
544 uses $sending_ip_address and an interface is specified.
545 Previously any use of the local address in the EHLO name disabled
546 PIPECONNECT, the common case being to use the rDNS of it.
548 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
549 resumption. Previously verify failed because no certificate status is
550 passed on the wire for the restarted session. Fix by using the recorded
551 ocsp status of the stored session for the new connection.
553 JH/29 TLS resumption: the key for session lookup in the client now includes
554 more info that a server could potentially use in configuring a TLS
555 session, avoiding oferring mismatching sessions to such a server.
556 Previously only the server IP was used.
558 JH/30 Fix string_copyn() for limit greater than actual string length.
559 Previously the copied amount was the limit, which could result in a
560 overlapping memcpy for newly allocated destination soon after a
561 source string shorter than the limit. Found/investigated by KM.
563 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
564 close; it may be needed for a subsequent connection. This caused a
565 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
567 JH/32 Fix CHUNKING for a second message on a connection when the first was
568 rejected. Previously we did not reset the chunking-offered state, and
569 erroneously rejected the BDAT command. Investigation help from
572 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
573 an empty address. Previously the expansion returned an error.
575 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
576 proxy. Previously these were misparsed, leading to paniclog entries.
582 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
583 related applications. Previously an "H" was used where available info
584 says that "M" should be, so change to match.
586 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
587 as arguments, so an implementation trying to copy these into a local
588 buffer was taking a taint-enforcement trap. Fix by using dynamically
589 created buffers. Similar fix for radius expansion condition.
591 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
592 reasonable, eg. to count headers. Fix by using dynamically created
593 buffers rather than a local. Do similar fixes for ACL actions "dcc",
594 "log_reject_target", "malware" and "spam"; the arguments are expanded
595 so could be handling tainted values.
597 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
598 broken the (no-op) support for this sendmail command. Restore it
599 to doing nothing, silently, and returning good status.
601 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
602 record path was given (or the default used) without a leading directory
603 path, an error occurred on trying to open it. Use the transport's working
606 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
607 transport. Previously it was the name on the DNS A-record; use instead
608 the head of the CNAME chain leading there (if there is one). This seems
609 to align better with RFC 6125.
611 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
612 smtp_accept_max_per_host allocated resources which were not released
613 when the limit was exceeded. This eventually crashed the daemon. Fix
614 by adding a release action in that path.
616 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
617 expanded; previously using tainted values was rejected. Fix by using
618 dynamically-created buffers.
620 JH/09 Relax restrictions on ACL verify condition needing access to message
621 headers. Previously they were only permitted in data and non-smtp ACLs;
622 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
623 not_blind, header_sender and header_names_ascii verification.
625 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
626 Previously a macro used one argument twice; when called with the
627 argument as an expression having side-effects, incorrect operation
628 resulted. Use an inlineable function.
630 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
631 held open for a verify callout. Previously this wan not accounted for
632 and a corrupt onward SMTP conversation resulted.
634 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
635 Previously they were embedded naively in the constructed address; when
636 needed, strip the quoting and quote the entire local_part.
637 Also make the inbound_srs expansion condition handle quoting.
639 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
640 excluded, not matching the documentation.
642 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
643 was given for the sqlite_dbfile a trap resulted.
645 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
646 "name" argument resulted in a trap. There is no reason to disallow such;
647 this was a coding error.
649 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
650 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
651 spent suspended, ignoring the POSIX definition. Previously we assumed
652 it did and a constant offset from real time could be used as a correction.
653 Change to using the same clock source for the start-of-message and the
654 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
655 exists, just to get a clock slightly more aligned to reality.
657 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
658 RFC says it is optional some validators care. The missing char was not
659 intended but triggered by a line-wrap alignment. Discovery and fix by
660 Guillaume Outters, hacked on by JH.
662 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
663 name being quoted was tainted a trap would be taken. Fix by using
664 dynamically created buffers. The routine could have been called by a
665 rewrite with the "h" flag, by using the "-F" command-line option, or
666 by using a "name=" option on a control=submission ACL modifier.
668 JH/19 SPF: change the Authentication-Results expansion component to give
669 smtp.helo when the sender domain is empty. Previously it gave
672 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
673 not in 127.0.0.0/8 to help in spotting list domains taken over by a
674 domain-parking registrar.
676 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
677 Previously when a whitespace character was specified it was not inserted
678 after removing the newline.
680 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
681 the domain part of the recipient address. This overrides any tls_sni
682 option set, which was previously used.
684 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
687 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
688 is_tainted() had an off-by-one error in the overenthusiastic direction.
689 Find and fix by Gavan. Although NetBSD is not a supported platform for
690 4.94 this bug could affect other platforms.
692 PP/01 Fix default prime selection to be consistent.
693 One path used ike23 still, instead of exim.dev.20160529.3; now both
694 execution flows will use the same DH primes (currently
695 exim.dev.20160529.3).
697 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
698 option in smtp transport, to match the documentation. Previously
699 verification was not being done in some cases where it should have been.
701 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
702 than one server was defined and depending on the platform memory layout
703 details, an internal consistency trap could be hit while walking the list
706 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
707 files. The value is used by the authresults expansion item. Previously
708 if this was used in a router or transport, a crash could result.
710 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
711 have a sufficient incidence of EINTR returns from select that an
712 interaction with other operations done by the main daemon loop exposed
713 a bug in the error-handling. This was benign apart from the log
716 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
717 for consistency with delivered "=>" and failed "**" lines. While we're
718 there, handle PRX and TFO.
720 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
721 applied. This resulted, if any header-line rewrite rules were configured,
722 in a panic-log triggerable by sending a message with a long address in
723 a header. Fix by increasing the arbitrary limit to larger than a single
724 (dewrapped) 5322 header line maximum size.
726 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
727 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
728 RFC 6648 which deprecates X- options in protocols as a general practice.
729 Changeover between the implementations is handled by the mechanisms
732 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
733 a remote which uses callout/hold. Previously the local was queued.
735 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
738 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
739 log line. The asterisk is now consistently appended to the remote IP
740 (and port, if given), and will also be provided on defer and fail log
741 lines. Previously it could be placed on the local IP if that was being
742 logged, and was only provided on delivery lines.
744 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
746 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
747 authenticator client_send option. Previously the next char, after a pair
748 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
749 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
750 documentation. There is still no way to get a leading ^ immediately
751 after a NUL (ie. for the password of a PLAIN method authenticator.
753 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
754 files. For bad sizes read, delete the record and whine to paniclog.
756 JH/38 When logging an AUTH failure, as server, do not include sensitive
757 information. Previously, the credentials would be included if given
758 as part of the AUTH command line and an ACL denied authentication.
760 JH/39 Bug 2691: fix $local_part_data. When the matching list element
761 referred to a file, bad data was returned. This likely also affected
764 JH/40 The gsasl authenticator now supports caching of the salted password
765 generated by the client-side implementation. This required the addition
766 of a new variable: $auth4.
768 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
769 left undeleted; the attempt to re-create it then failed - resulting in
770 the usual "SIGHUP tp have daemon reload configuration" to not work.
771 This affected any platform not supporting "abstract" Unix-domain
772 sockets (i.e. not Linux).
774 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
775 recipients" response to RCPT in a later response, with a 250. The
776 previous coding assumed this would not happen, and under PIPELINING
777 would result in both lost and duplicate recipients for a message.
779 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
780 Previously the weighting was incorrectly applied. Similar fix for socks
781 proxies. Found and fixed by Heiko Schlichting.
783 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
784 not handle sub-lists included using the +namedlist syntax. While
785 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
786 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
789 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
790 Previously the permanent pool was used, so the store could not be freed.
791 This meant a connection with many messages would use continually-growing
794 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
795 per-pool so as not to waste too much space. Previously a constant size
796 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
797 DOS attacks harder. The cost is wasted memory use in the larger blocks.
799 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
800 same space repeatedly, and a smaller process footprint.
802 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
803 for GnuTLS. Previously the name started "%s" which, while not a bug,
804 looked as if if might be one.
806 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
807 "continued connection") make the $proxy_* variables available. Previously
808 the information was not passed across the exec() call for subsequent
809 transport executions. This also mean that the log lines for the
810 messages can show the proxy information.
812 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
813 receive time. With modern systems the difference is significant.
814 The historical behaviour can be restored by disabling (a new) log_selector
815 "queue_time_exclusive".
817 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
818 content) were specifically tested for. Now, also cover expansions
819 resulting in ACL names and inline ACL content.
821 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
822 making it unusable in complex expressions.
824 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
825 fail with a taint-check on the spoolfile name, and leave the message
828 HS/01 Enforce absolute PID file path name.
830 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
832 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
834 PP/02 Bug 2643: Correct TLS DH constants.
835 A missing NUL termination in our code-generation tool had led to some
836 incorrect Diffie-Hellman constants in the Exim source.
837 Reported by kylon94, code-gen tool fix by Simon Arlott.
839 PP/03 Impose security length checks on various command-line options.
840 Fixes CVE-2020-SPRSS reported by Qualys.
842 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
843 better. Reported by Qualys.
845 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
846 providing a particularly obnoxious sender full name.
849 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
851 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
854 PP/08 Change default for recipients_max from unlimited to 50,000.
856 PP/09 Fix security issue with too many recipients on a message (to remove a
857 known security problem if someone does set recipients_max to unlimited,
858 or if local additions add to the recipient list).
859 Fixes CVE-2020-RCPTL reported by Qualys.
861 PP/10 Fix security issue in SMTP verb option parsing
862 Fixes CVE-2020-EXOPT reported by Qualys.
864 PP/11 Fix security issue in BDAT state confusion.
865 Ensure we reset known-good where we know we need to not be reading BDAT
866 data, as a general case fix, and move the places where we switch to BDAT
867 mode until after various protocol state checks.
868 Fixes CVE-2020-BDATA reported by Qualys.
870 HS/03 Die on "/../" in msglog file names
872 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
873 the Exim runtime user are allowed to create files.
875 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
878 QS/03 When reading the output from interpreted forward files we do not
879 pass the pipe between the parent and the interpreting process to
880 executed child processes (if any).
882 QS/04 Always die if requested from internal logging, even is logging is
885 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
886 the API; compilation noo longer completes with DMARC support included.
887 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
888 been reported on other platforms.
890 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
892 JH/56 Make the majority of info read from config files readonly, for defence-in-
893 depth against exploits. Suggestion by Qualys.
894 Not supported on Solaris 10.
896 JH/57 Fix control=fakreject for a custom message containing tainted data.
897 Previously this resulted in a log complaint, due to a re-expansion present
898 since fakereject was originally introduced.
900 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
901 modifier was given, a loop resulted.
903 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
904 pipelined SMTP command followed the BDAT LAST then it would be
905 incorrectly treated as part of the message body, causing a verification
908 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
909 require looser validation rules than those for 821-level addresses,
910 which only permit IP addresses.
916 JH/01 Avoid costly startup code when not strictly needed. This reduces time
917 for some exim process initialisations. It does mean that the logging
918 of TLS configuration problems is only done for the daemon startup.
920 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
922 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
923 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
926 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
927 DKIM signing is being done. Previously a transport_filter would always
928 disable CHUNKING, falling back to traditional DATA.
930 JH/05 Regard command-line recipients as tainted.
932 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
934 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
935 PAM library frees one of the arguments given to it, despite the
936 documentation. Therefore a plain malloc must be used.
938 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
939 on-stack buffers were used, resulting in a taint trap when DSN information
940 copied from a received message was written into the buffer.
942 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
943 the ordering of its ARC headers. This caused a crash.
945 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
946 a new record was being constructed with information from the peer, a trap
949 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
950 installation would get error messages from DMARC verify, when it hit the
951 nonexistent file indicated by the default. Distros wanting DMARC enabled
952 should both provide the file and set the option.
953 Also enforce no DMARC verification for command-line sourced messages.
955 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
956 could, depending on the platform, hang at the STARTTLS response.
958 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
959 message on a connection. Previously if one message had ARC headers and
960 the following one did not, a crash could result when adding an
961 Authentication-Results: header.
963 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
964 Exim main code and Exim-related utities. The introduction of taint
965 tracking also did many adjustments to string handling. Since then, eximon
966 frequently terminated with an assert failure.
968 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
969 check for 452 responses. This slightly helps the inefficieny of doing
970 a large alias-expansion into a recipient-limited target. The max_rcpt
971 transport option still applies (and at the current default, will override
972 the new feature). The check is done for either cause of synch, and forces
973 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
974 connection. The new facility is not tunable at this time.
976 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
977 library live data was being used, so the results became garbage. Make
978 copies while it is still usable.
980 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
981 on delivery deferred (==) and failed (**) lines (if a delivery was
982 attemtped). Previously it was only on completion (=>) lines.
984 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
985 for the expansion of the server_scram_iter and server_scram_salt options.
987 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
988 are now specifically given a NO_DATA response without hitting the system
989 resolver. The library goes on to do the now-standard TXT lookup.
990 Use of dnsdb lookups is not affected.
992 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
993 only retrieve the errormessage once. Previously two calls to dlerror()
994 were used, and the second one (for mainlog/paniclog) retrieved null
997 JH/20 Taint checking: disallow use of tainted data for
998 - the appendfile transport file and directory options
999 - the pipe transport command
1000 - the autoreply transport file, log and once options
1001 - file names used by the redirect router (including filter files)
1003 - paths used by single-key lookups
1004 Previously this was permitted.
1006 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
1007 adjusted the size of a major service buffer; this failed because the
1008 buffer was in use at the time. Change to a compile-time increase in the
1009 buffer size, when this authenticator is compiled into exim.
1011 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
1012 previous fast-mode was untenable in the face of glibs using mmap to
1013 support larger malloc requests.
1015 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
1016 New values supported, if defined on system where compiled:
1017 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
1018 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
1020 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
1021 running a limited number of proceses in parallel, a benefit is gained. The
1022 amount varies with the platform hardware and load. The use of the option
1023 queue_run_in_order means we cannot do this, as ordering becomes
1026 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1027 had introduced a string-copy (for ensuring NUL-termination) which was not
1028 appropriate for that case, which can include embedded NUL bytes in the
1029 block of data. Investigation showed the copy to actually be needless, the
1030 data being length-specified.
1032 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1033 done during a receiving connection, and both used TLS, global info was
1034 used rather than per-connection info for tracking the state of data
1035 queued for transmission. This could result in a connection hang.
1037 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1038 Previously, when delivering serveral messages down a single connection
1039 only the first would provide a SIZE. This was due to the size information
1040 not being properly tracked.
1042 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1043 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1044 expansion and logging. Previously, spurious values such as a future
1045 minute could be seen.
1047 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1048 it could crash from a null-deref. This could also affect the
1049 ${addresses: } operator and ${readsock } item.
1051 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1052 message following a mime one, the variable was not reset.
1054 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1055 cached capability (perhaps the peer reneged?) and immediately retry in
1058 JH/31 Fix spurious detection of timeout while writing to transport filter.
1060 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1061 an attempt to copy the string was made before checking it.
1063 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1064 taint of the lookup key was maintained; we now regard the presence in the
1065 filesystem as sufficient validation.
1067 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1068 argument is supplied.
1070 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1071 Previously this was not checked, and nonempty relative paths made an
1072 access under Exim's current working directory.
1074 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1075 Previously no event was raised.
1077 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1078 parameter supplied by the sender MAIL FROM command. Previously it was
1079 ignored, and only the check_spool_space option value for the required
1082 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1083 the size of the signing public-key. Previously it was instead giving
1084 the size of the signature hash.
1086 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1087 the default. See the (new) dkim_verify_min_keysizes option.
1089 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1090 and an ACL use a lookup for checking either the local_part or domain,
1091 stale data could be accessed. Ensure that variable references are
1092 dropped between messages.
1094 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1095 by the client was not checked as pointing within response data before
1096 being used. A malicious client could thus cause an out-of-bounds read and
1097 possibly gain authentication. Fix by adding the check.
1099 JH/42 Internationalisation: change the default for downconversion in the smtp
1100 transport to be "if needed". Previously it was "as previously set" for
1101 the message, which usually meant "if needed" for message-submission but
1102 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1103 even when the envelope addresses did not need it, resulting in forwarding
1104 failures to non-supporting MTAs. A downconvert in such cases will be
1105 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1106 transport. The change does mean that addresses needing conversion will
1107 be converted when previously a delivery failure would occur.
1109 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1110 response was received it would be used unchecked in a fail-DSN, violating
1111 standards on line-length limits. Truncate if needed.
1113 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1114 doesn't work. (Additionally add a new main config option to configure the
1121 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1122 side, to decode a TLS 1.3 packet capture.
1124 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1125 Previously the default library behaviour applied, sending two, each in
1126 its own TCP segment.
1128 JH/03 Debug output for ACL now gives the config file name and line number for
1131 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1133 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1135 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1136 buffer overrun for (non-chunking) other transports.
1138 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1139 TLS1.3, means that a server rejecting a client certificate is not visible
1140 to the client until the first read of encrypted data (typically the
1141 response to EHLO). Add detection for that case and treat it as a failed
1142 TLS connection attempt, so that the normal retry-in-clear can work (if
1143 suitably configured).
1145 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1146 and/or domain. Found and fixed by Jason Betts.
1148 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1149 configuration). If a CNAME target was not a wellformed name pattern, a
1152 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1153 the OS reports them interleaved with other addresses.
1155 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1156 used both for input and for a verify callout, both encrypted, SMTP
1157 responses being sent by the server could be lost. This resulted in
1158 dropped connections and sometimes bounces generated by a peer sending
1161 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1162 string. Previously it was possible to cause undefined behaviour in a
1163 library routine (usually a crash). Found by "zerons".
1165 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1168 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1169 API was removed, so update to use the newer ones.
1171 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1172 any timeout set, is taking a long time. Previously we would hang on to a
1173 rotated logfile "forever" if the input was arriving with long gaps
1174 (a previous attempt to fix addressed lack, for a long time, of initial
1177 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1178 shared (NFS) environment. The length of the tempfile name is now
1179 4 + 16 ("hdr.$message_exim_id") which might break on file
1180 systems which restrict the file name length to lower values.
1181 (It was "hdr.$pid".)
1183 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1184 shared (NFS) environment.
1186 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1187 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1190 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1191 on some platforms for bit 31.
1193 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1194 to changes apparently associated with TLS1.3 handling some of the APIs
1195 previously used were either nonfunctional or inappropriate. Strings
1196 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1197 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1198 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1199 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1200 and the use of specific cipher names in the encrypted= ACL condition.
1202 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1204 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1205 verification result was not updated unless hosts_require_ocsp applied.
1207 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1208 queue_list_requires_admin set to false, non-admin users were denied the
1211 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1212 directory-of-certs mode. Previously they were advertised despite the
1215 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1216 A single TCP connection by a client will now hold a TLS connection open
1217 for multiple message deliveries, by default. Previously the default was to
1220 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1221 default. If built with the facility, DANE will be used. The facility
1222 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1224 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1225 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1226 must be defined and you must still, unless you define DISABLE_TLS, manage
1227 the the include-dir and library-file requirements that go with that
1228 choice. Non-TLS builds are still supported.
1230 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1233 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1234 default. If the platform supports and has the facility enabled, it will
1235 be requested on all coneections.
1237 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1238 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1240 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1242 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1243 success-DSN messages. Previously the From: header was always the default
1244 one for these; the option was ignored.
1246 JH/28 Fix the timeout on smtp response to apply to the whole response.
1247 Previously it was reset for every read, so a teergrubing peer sending
1248 single bytes within the time limit could extend the connection for a
1249 long time. Credit to Qualsys Security Advisory Team for the discovery.
1251 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1252 delivery address, which leaked information of the results of local
1253 forwarding. Change to the original envelope recipient address, per
1256 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1257 requested. Previously not bounce was generated and a log entry of
1258 error ignored was made.
1260 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1262 JH/32 Introduce a general tainting mechanism for values read from the input
1263 channel, and values derived from them. Refuse to expand any tainted
1264 values, to catch one form of exploit.
1266 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1267 was unused and the unexpanded text used for the test. Found and
1268 fixed by Ruben Jenster.
1270 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1271 an attempt to use a TLS library read routine dereffed a nul pointer,
1274 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1275 them in our smtp response.
1277 JH/36 Have the general router option retry_use_local_part default to true when
1278 any of the restrictive preconditions are set (to anything). Previously it
1279 was only for check_local user. The change removes one item of manual
1280 configuration which is required for proper retries when a remote router
1281 handles a subset of addresses for a domain.
1283 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1284 link count into consideration.
1286 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1287 caused the extension of big_buffer, the following lines were ignored.
1289 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1290 accordance with RFC 2308. Previously there was no expiry, so a longlived
1291 receive process (eg. due to ACL delays) versus a short SOA value could
1294 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1296 JH/39 Promote DMARC support to mainline.
1298 JH/40 Bug 2452: Add a References: header to DSNs.
1300 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1301 parameters. The relevant library call is documented as "Deprecated: This
1302 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1303 3.6.0, DH parameters are negotiated following RFC7919."
1305 HS/06 Change the default of dnssec_request_domains to "*"
1307 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1308 carried on and emitted a BDAT command, even when PIPELINING was not
1311 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1312 buffer was used for the filename, resulting in a trap when tainted
1313 arguments (eg. $domain) were used.
1315 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1316 recommended to avoid a possible server-load attack. The feature can be
1317 re-enabled via the openssl_options main cofiguration option.
1319 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1320 for version 4.90 - adding a "more data" boolean to the arguments.
1321 Bumped the ABI version number also, this having been missed previously;
1322 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1323 respect of usage of smtp_printf() by either local_scan code or libraries
1324 accessed via the ${dlfunc } expansion item. Both will need coding
1325 adjustment for any calls to smtp_printf() to match the new function
1326 signature; a FALSE value for the new argument is always safe.
1328 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1329 the file-offset (which the Linux syscall does, and exim expects); this
1330 resulted in an indefinite loop.
1332 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1333 to do ARC verification. The Authentication-Results: header line added
1334 by the configuration then had no ARC item.
1336 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1337 an incorrect mode was used for reading the result, resulting in it being
1344 JH/01 Remove code calling the customisable local_scan function, unless a new
1345 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1347 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1348 non-signal-safe functions being used.
1350 JH/03 Bug 2269: When presented with a received message having a stupidly large
1351 number of DKIM-Signature headers, disable DKIM verification to avoid
1352 a resource-consumption attack. The limit is set at twenty.
1354 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1355 report of oldest_pass in ${authres } in consequence, and separate out
1356 some descriptions of reasons for verification fail.
1358 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1359 files in the spool were present and unlocked. A queue-runner could spot
1360 them, resulting in a duplicate delivery. Fix that by doing the unlock
1361 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1362 add more error-checking on spoolfile handling while that code is being
1365 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1366 No known attacks, no CVE, this is defensive hardening.
1368 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1369 a queue-runner could start a delivery while other operations were ongoing.
1370 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1371 Found and investigated by Tim Stewart. Fix by using the open message data
1372 file handle rather than opening another, and not locally closing it (which
1373 releases a lock) for that case, while creating the temporary .eml format
1374 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1376 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1377 $sender_verify_failure/$recipient_verify_failure to "random".
1379 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1382 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1383 Previously this would segfault.
1385 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1388 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1389 like zero, since the resolver should be doing this for us, But we need one
1390 as a CNAME but no MX presence gets the CNAME returned; we need to check
1391 that doesn't point to an MX to declare it "no MX returned" rather than
1392 "error, loop". A new main option is added so the older capability of
1393 following some limited number of chain links is maintained.
1395 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1397 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1398 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1399 now-deprecated earlier definitions used only specified the range up to TLS
1400 1.2 (in the older-version library docs).
1402 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1404 JH/15 Rework TLS client-side context management. Stop using a global, and
1405 explicitly pass a context around. This enables future use of TLS for
1406 connections to service-daemons (eg. malware scanning) while a client smtp
1407 connection is using TLS; with cutthrough connections this is quite likely.
1409 JH/16 Fix ARC verification to do AS checks in reverse order.
1411 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1413 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1414 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1415 Previously the "utf8" would be re-prepended for every additional message.
1417 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1418 Previously thery were accepted, resulting in issues when attempting to
1419 forward messages to a non-supporting MTA.
1421 PP/02 Let -n work with printing macros too, not just options.
1423 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1424 one parent address was copied, and bogus data was used at delivery-logging
1425 time. Either a crash (after delivery) or bogus log data could result.
1426 Discovery and analysis by Tim Stewart.
1428 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1429 Previously if the string ended mid-character, we did not insert the
1430 promised '?' replacement.
1432 PP/04 Documentation: current string operators work on bytes, not codepoints.
1434 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1435 should pack well giving a smaller memory footprint so better caching and
1436 therefore performance. Group the declarations where this can't be done so
1437 that the byte-sized flag variables are not interspersed among pointer
1438 variables, giving a better chance of good packing by the compiler.
1440 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1441 non-null, to avoid issues with sites running BATV. Previously reports were
1442 sent with an empty envelope sender so looked like bounces.
1444 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1445 The ignore_error flag wasn't being returned from the filter subprocess so
1446 was not set for later routers. Investigation and fix by Matthias Kurz.
1448 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1449 and a msg:complete for the whole, when a message is manually removed using
1450 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1452 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1453 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1454 hope that is portable enough.
1456 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1457 requiring a known-CA anchor certificate; make it now rely entirely on the
1458 TLSA as an anchor. Checking the name on the leaf cert against the name
1459 on the A-record for the host is still done for TA (but not for EE mode).
1461 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1462 included in delivery lines for non-proxied connections, when compiled with
1463 SUPPORT_SOCKS and running with proxy logging enabled.
1465 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1466 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1467 move the existing event to fire before the normal logging of message
1468 failure so that custom logging is bracketed by normal logging.
1470 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1471 msg:fail:internal event. Developement by Matthias Kurz.
1473 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1474 far too small for todays use of crypto signatures stored there. Go all
1475 the way to the max DNS message size of 64kB, even though this might be
1476 overmuch for IOT constrained device use.
1478 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1479 copy a string over itself. The library routine is documented as not
1480 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1482 JH/32 For main options check_spool_space and check_inode_space, where the
1483 platform supports 64b integers, support more than the previous 2^31 kB
1484 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1485 the previous G, M, k.
1487 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1488 $authenticated_fail_id variable on authentication failure. Previously
1491 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1492 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1493 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1494 GNUTLS_SEC_PARAM_MEDIUM.
1496 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1497 side. Previously we would continue as if no SNI had been received.
1499 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1500 "<" character, which should be a list-separator specification, we walked
1501 off past the nul-terimation.
1503 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1504 causes) even when the retry time is not yet met. Previously they were
1505 not, meaning that when (say) an account was over-quota and temp-rejecting,
1506 and multiple senders' messages were queued, only one sender would get
1507 notified on each configured delay_warning cycle.
1509 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1511 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1512 cipher-suites, an error can be left on the stack even for a succeeding
1513 accept; this results in impossible error messages when a later operation
1516 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1517 return error codes indicating retry. Under TLS1.3 this becomes required.
1519 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1520 it only wrote the new authenticators, resulting in a lack of tracking of
1521 peer changes of ESMTP extensions until the next cache flush.
1523 JH/41 Fix the loop reading a message header line to check for integer overflow,
1524 and more-often against header_maxsize. Previously a crafted message could
1525 induce a crash of the recive process; now the message is cleanly rejected.
1527 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1528 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1534 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1535 When redis_servers is set to a list of > 1 element, and the Redis servers
1536 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1537 case of MOVED into a DEFER case instead, thus moving the query onto the
1538 next server in the list. For a cluster of N elements, all N servers must
1539 be defined in redis_servers.
1541 GF/02 Catch and remove uninitialized value warning in exiqsumm
1542 Check for existence of @ARGV before looking at $ARGV[0]
1544 JH/01 Replace the store_release() internal interface with store_newblock(),
1545 which internalises the check required to safely use the old one, plus
1546 the allocate and data copy operations duplicated in both (!) of the
1547 extant use locations.
1549 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1550 modifier. This matches the restriction on the commandline.
1552 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1553 Previously only the last row was returned.
1555 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1556 we assumed that tags in the header were well-formed, and parsed the
1557 element content after inspecting only the first char of the tag.
1558 Assumptions at that stage could crash the receive process on malformed
1561 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1562 While running the DKIM ACL we operate on the Permanent memory pool so that
1563 variables created with "set" persist to the DATA ACL. Also (at any time)
1564 DNS lookups that fail create cache records using the Permanent pool. But
1565 expansions release any allocations made on the current pool - so a dnsdb
1566 lookup expansion done in the DKIM ACL releases the memory used for the
1567 DNS negative-cache, and bad things result. Solution is to switch to the
1568 Main pool for expansions.
1569 While we're in that code, add checks on the DNS cache during store_reset,
1570 active in the testsuite.
1571 Problem spotted, and debugging aided, by Wolfgang Breyha.
1573 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1574 When none of the hosts presented to a transport match an already-open
1575 connection, close it and proceed with the list. Previously we would
1576 queue the message. Spotted by Lena with Yahoo, probably involving
1579 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1580 Previously a spurious "250 OK id=" response was appended to the proper
1583 JH/08 The "support for" informational output now, which built with Content
1584 Scanning support, has a line for the malware scanner interfaces compiled
1585 in. Interface can be individually included or not at build time.
1587 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1588 by the template makefile "src/EDITME". The "STREAM" support for an older
1589 ClamAV interface method is removed.
1591 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1592 rows affected is given instead).
1594 JH/11 The runtime Berkeley DB library version is now additionally output by
1595 "exim -d -bV". Previously only the compile-time version was shown.
1597 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1598 SMTP connection. Previously, when one had more recipients than the
1599 first, an abortive onward connection was made. Move to full support for
1600 multiple onward connections in sequence, handling cutthrough connection
1601 for all multi-message initiating connections.
1603 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1604 routers. Previously, a multi-recipient message would fail to match the
1605 onward-connection opened for the first recipient, and cause its closure.
1607 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1608 a timeout on read on a GnuTLS initiating connection, resulting in the
1609 initiating connection being dropped. This mattered most when the callout
1610 was marked defer_ok. Fix to keep the two timeout-detection methods
1613 JH/15 Relax results from ACL control request to enable cutthrough, in
1614 unsupported situations, from error to silently (except under debug)
1615 ignoring. This covers use with PRDR, frozen messages, queue-only and
1618 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1620 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1621 metadata, resulting in a crash in free().
1623 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1624 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1625 Broken also in d185889f4, with init system revamp.
1627 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1628 Previously we abruptly closed the connection after reading a malware-
1629 found indication; now we go on to read the "scan ok" response line,
1632 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1633 ACL. Previously, a crash would result.
1635 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1636 macro text after a replacement (previously it was only once per line) and
1637 by skipping builtin macros when searching for an uppercase lead character.
1639 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1640 for the build is renamed.
1642 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1643 was allocated for every new TLS startup, meaning one per message. Fix
1644 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1646 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1647 reported the original. Fix to report (as far as possible) the ACL
1648 result replacing the original.
1650 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1651 OpenSSL. Certificate information is loaded for every new TLS startup,
1652 and the resources needed to be freed.
1654 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1656 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1659 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1660 DATA response info to the (existing) per-recipient response info for
1661 the "C=" log element. It can have useful tracking info from the
1662 destination system. Patch from Simon Arlott.
1664 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1665 length value. Previously this would segfault.
1667 HS/02 Support Avast multiline protoocol, this allows passing flags to
1668 newer versions of the scanner.
1670 JH/28 Ensure that variables possibly set during message acceptance are marked
1671 dead before release of memory in the daemon loop. This stops complaints
1672 about them when the debug_store option is enabled. Discovered specifically
1673 for sender_rate_period, but applies to a whole set of variables.
1674 Do the same for the queue-runner and queue-list loops, for variables set
1675 from spool message files. Do the same for the SMTP per-message loop, for
1676 certain variables indirectly set in ACL operations.
1678 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1679 as a multi-recipient message from a mailinglist manager). The coding had
1680 an arbitrary cutoff number of characters while checking for more input;
1681 enforced by writing a NUL into the buffer. This corrupted long / fast
1682 input. The problem was exposed more widely when more pipelineing of SMTP
1683 responses was introduced, and one Exim system was feeding another.
1684 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1685 receiving system, and refused recipients seen by the sending system
1686 (propating to people being dropped from mailing lists).
1687 Discovered and pinpointed by David Carter.
1689 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1690 replaced by the ${authresults } expansion.
1692 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1694 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1695 allows proper process termination in container environments.
1697 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1698 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1700 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1701 and "err_perm", deprecated since 4.83 when the RFC-defined words
1702 "temperror" and "permerror" were introduced.
1704 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1705 transport-filters or DKIM-signing. The restriction was lost in the
1706 consolidation of verify-callout and delivery SMTP handling.
1707 Extend the restriction to also cover ARC-signing.
1709 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1710 in defer=pass mode supply a 450 to the initiator. Previously the message
1713 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1714 tls_require_ciphers is used as before.
1716 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1717 "pass_unscanned". Only tmpfails from the scanner are written to
1718 the paniclog, as they may require admin intervention (permission
1719 denied, license issues). Other scanner errors (like decompression
1720 bombs) do not cause a paniclog entry.
1722 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1723 Previously it was possible to log spurious information in receive log
1726 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1727 triggered odd behaviour from Outlook Express clients.
1729 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1732 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1733 since the IETF WG has not yet settled on that versus the original
1734 "bare" representation.
1736 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1737 Previously the millisecond value corrupted the output.
1738 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1739 corrupted the output.
1745 JH/01 Rework error string handling in TLS interface so that the caller in
1746 more cases is responsible for logging. This permits library-sourced
1747 string to be attached to addresses during delivery, and collapses
1748 pairs of long lines into single ones.
1750 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1751 during configuration. Wildcards are allowed and expanded.
1753 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1754 This permits better logging.
1756 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1757 do not close it down and have the child transport start it up again on
1758 the passed-on TCP connection. Instead, proxy the child (and any
1759 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1760 affected: the continued delivery log lines do not have any DNSSEC, TLS
1761 Certificate or OCSP information. TLS cipher information is still logged.
1763 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1764 identical IP addresses on different listening ports. Will also affect
1767 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1768 add noisy ifdef guards to special-case this sillyness.
1769 Patch from Bernd Kuhls.
1771 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1772 than 255 are no longer allowed.
1774 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1775 Disable the session-cache too, which might reduce our load. Since we
1776 currrectly use a new context for every connection, both as server and
1777 client, there is no benefit for these.
1778 GnuTLS appears to not support tickets server-side by default (we don't
1779 call gnutls_session_ticket_enable_server()) but client side is enabled
1780 by default on recent versions (3.1.3 +) unless the PFS priority string
1783 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1784 <https://reproducible-builds.org/specs/source-date-epoch/>.
1786 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1787 the check for any unsuccessful recipients did not notice the limit, and
1788 erroneously found still-pending ones.
1790 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1791 MSG_MORE. Only in-clear (not on TLS connections).
1793 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1794 transport-filter is involved we can buffer the headers in memory for
1795 creating the signature, and read the spool data file once for the
1796 signature and again for transmission.
1798 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1799 4.77 as the kernel support then wasn't solid, having issues in 64bit
1800 mode. Now, it's been long enough. Add support for FreeBSD also.
1802 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1803 case where the routing stage had gathered several addresses to send to
1804 a host before calling the transport for the first, we previously failed
1805 to close down TLS in the old transport process before passing the TCP
1806 connection to the new process. The new one sent a STARTTLS command
1807 which naturally failed, giving a failed delivery and bloating the retry
1808 database. Investigation and fix prototype from Wolfgang Breyha.
1810 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1811 false-negatives in the check that the sender had not preempted a response
1812 or prompt from Exim (running as a server), due to that code's lack of
1813 awareness of the SMTP input buffering.
1815 PP/04 Add commandline_checks_require_admin option.
1816 Exim drops privileges sanely, various checks such as -be aren't a
1817 security problem, as long as you trust local users with access to their
1818 own account. When invoked by services which pass untrusted data to
1819 Exim, this might be an issue. Set this option in main configuration
1820 AND make fixes to the calling application, such as using `--` to stop
1823 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1824 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1825 responses to those, into a single TLS record each way (this usually means
1826 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1829 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1830 affects you only if you're dancing at the edge of the param size limits.
1831 If you are, and this message makes sense to you, then: raise the
1832 configured limit or use OpenSSL 1.1. Nothing we can do for older
1835 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1836 cmdline element to get the documented default one. Previously it was
1839 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1840 are unsuable for non-message-specific reasons - eg. connection timeout,
1841 banner-time rejection.
1843 JH/16 Fix logging of delivery remote port, when specified by router, under
1846 PP/06 Repair manualroute's ability to take options in any order, even if one
1847 is the name of a transport.
1850 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1852 JH/17 Change the list-building routines interface to use the expanding-string
1853 triplet model, for better allocation and copying behaviour.
1855 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1856 Previously it was constructed the first time a possibly-matching string
1857 was met in the configuration file input during startup; now it is done
1860 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1861 compatible one, to avoid the (poorly documented) possibility of a config
1862 file in the working directory redirecting the DB files, possibly correpting
1863 some existing file. CVE-2017-10140 assigned for BDB.
1865 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1866 cache-hot. Previously, although the result was properly cached, the
1867 initial verify call returned a defer.
1869 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1870 the main verify for receipient in uncached-mode.
1872 JH/22 Retire historical build files to an "unsupported" subdir. These are
1873 defined as "ones for which we have no current evidence of testing".
1875 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1876 if present. Previously it was ignored.
1878 JH/24 Start using specified-initialisers in C structure init coding. This is
1879 a C99 feature (it's 2017, so now considered safe).
1881 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1882 if was a fixed-sized field and bitmask ops via macros; it is now more
1885 PP/07 GitHub PR 56: Apply MariaDB build fix.
1886 Patch provided by Jaroslav Škarvada.
1888 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1889 during Coverity cleanups [4.87 JH/47]
1890 Diagnosis and fix provided by Michael Fischer v. Mollard.
1892 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1893 the right size to place the terminating semicolon on its own folded
1894 line, the header hash was calculated to an incorrect value thanks to
1895 the (relaxed) space the fold became.
1897 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1898 and confused the parent.
1900 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1901 which could crash as a result. This could lead to undeliverable messages.
1903 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1906 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1907 matters on fast-turnover and PID-randomising systems, which were getting
1908 out-of-order delivery.
1910 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1911 a possibly-overlapping copy. The symptom was that "Remote host closed
1912 connection in response to HELO" was logged instead of the actual 4xx
1915 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1916 Previously only that bufferd was discarded, resulting in SYMTP command
1919 JH/32 DKIM: when a message has multiple signatures matching an identity given
1920 in dkim_verify_signers, run the dkim acl once for each. Previously only
1921 one run was done. Bug 2189.
1923 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1924 "panic the current process" to "deliberately defer". The panic log is
1925 still written with the problem list name; the mail and reject logs now
1926 get a temp-reject line for the message that was being handled, saying
1927 something like "domains check lookup or other defer". The SMTP 451
1928 message is still "Temporary local problem".
1930 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1931 A crafted sequence of BDAT commands could result in in-use memory beeing
1932 freed. CVE-2017-16943.
1934 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1935 from SMTP input. Previously it was always done; now only done for DATA
1936 and not BDAT commands. CVE-2017-16944.
1938 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1939 to the message (such as an overlong header line). Previously this was
1940 not done and we did not exit BDAT mode. Followon from the previous item
1941 though a different problem.
1947 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1948 than -2003 did; needs libidn2 in addition to libidn.
1950 JH/02 The path option on a pipe transport is now expanded before use.
1952 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1953 Patch provided by "Björn", documentation fix added too.
1955 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1956 missing a wire-to-host endian conversion.
1958 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1959 close after a BDAT command line could be taken as a following command,
1960 giving a synch failure. Fix by only checking for synch immediately
1961 before acknowledging the chunk.
1963 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1964 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1965 macro. Patches provided by Josh Soref.
1967 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1968 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1969 by IANA as a service extension. However, John Klensin suggests that we
1972 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1973 the dkim code may be unix-mode line endings rather than smtp wire-format
1974 CRLF, so prepend a CR to any bare LF.
1976 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1977 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1979 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1980 the first were themselves being wrongly included in the feed into dkim
1981 processing; with most chunk sizes in use this resulted in an incorrect
1982 body hash calculated value.
1984 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1985 DKIM signature block, for verification. Although advised against by
1986 standards it is specifically not ruled illegal.
1988 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1990 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1991 missing a body hash (the bh= tag).
1993 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1994 It seems that HAProxy sends the Proxy Protocol information in clear and
1995 only then does a TLS startup, so do the same.
1997 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1998 TCP connections (such as for Spamd) unless the daemon successfully set
1999 Fast Open mode on its listening sockets. This fixes breakage seen on
2000 too-old kernels or those not configured for Fast Open, at the cost of
2001 requiring both directions being enabled for TFO, and TFO never being used
2002 by non-daemon-related Exim processes.
2004 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
2005 endings, at least on the first header line. Try to canonify any that get
2006 past that check, despite the cost.
2008 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
2009 now limited to an arbitrary five deep, while parsing addresses with the
2010 strip_excess_angle_brackets option enabled.
2012 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
2013 instead leave the unprompted TLS handshake in socket buffer for the
2014 TLS library to consume.
2016 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
2018 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
2020 JH/16 Drop variables when they go out of scope. Memory management drops a whole
2021 region in one operation, for speed, and this leaves assigned pointers
2022 dangling. Add checks run only under the testsuite which checks all
2023 variables at a store-reset and panics on a dangling pointer; add code
2024 explicitly nulling out all the variables discovered. Fixes one known
2025 bug: a transport crash, where a dangling pointer for $sending_ip_address
2026 originally assigned in a verify callout, is re-used.
2028 PP/06 Drop '.' from @INC in various Perl scripts.
2030 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2032 PP/08 Reduce a number of compilation warnings under clang; building with
2033 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2034 should be warning-free.
2036 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2038 HS/01 Fix portability problems introduced by PP/08 for platforms where
2039 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2041 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2042 chunk. This allows us to accept broken chunked messages. We need a more
2043 general solution here.
2045 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2046 already-broken messages in the queue.
2048 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2050 JH/19 Fix reference counting bug in routing-generated-address tracking.
2056 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2057 supports it and a size is available (ie. the sending peer gave us one).
2059 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2060 years of being deprecated). The replacements are the ACLs
2061 acl_smtp_mime and acl_not_smtp_mime.
2063 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2064 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2065 or even an in-clear connection were permitted. Now, if the host lookup
2066 was dnssec and dane was requested then the host is only used if the
2067 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2068 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2069 if one fails this test.
2070 This means that a poorly-configured remote DNS will make it incommunicado;
2071 but it protects against a DNS-interception attack on it.
2073 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2074 non-noisy when a race steals the message being considered.
2076 JH/05 If main configuration option tls_certificate is unset, generate a
2077 self-signed certificate for inbound TLS connections.
2079 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2080 in rewrites and routers.
2082 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2083 and logged a warning sing 4.83; now they are a configuration file error.
2085 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2086 (lacking @domain). Apply the same qualification processing as RCPT.
2088 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2090 JH/10 Support ${sha256:} applied to a string (as well as the previous
2093 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2094 a cutthrough deliver is pending, as we always want to make a connection.
2095 This also avoids re-routing the message when later placing the cutthrough
2096 connection after a verify cache hit.
2097 Do not update it with the verify result either.
2099 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2100 when routing results in more than one destination address.
2102 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2103 signing (which inhibits the cutthrough capability). Previously only
2104 the presence of an option was tested; now an expansion evaluating as
2105 empty is permissible (obviously it should depend only on data available
2106 when the cutthrough connection is made).
2108 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2109 the relevant preceding SMTP command did not note the pipelining mode.
2111 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2112 Previously they were not counted.
2114 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2115 as one having no matching records. Previously we deferred the message
2116 that needed the lookup.
2118 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2119 distinguished as "(=".
2121 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2122 for missing MX records. Previously it only worked for missing A records.
2124 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2126 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2127 after the data-go-ahead and data-ack. Patch from Jason Betts.
2129 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2130 even for a "none" policy. Patch from Tony Meyer.
2132 JH/22 Fix continued use of a connection for further deliveries. If a port was
2133 specified by a router, it must also match for the delivery to be
2136 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2137 When one of the recipients of a message was unsuitable for the connection
2138 (has no matching addresses), we lost track of needing to mark it
2139 deferred. As a result mail would be lost.
2141 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2143 JH/25 Decoding ACL controls is now done using a binary search; the source code
2144 takes up less space and should be simpler to maintain. Merge the ACL
2145 condition decode tables also, with similar effect.
2147 JH/26 Fix problem with one_time used on a redirect router which returned the
2148 parent address unchanged. A retry would see the parent address marked as
2149 delivered, so not attempt the (identical) child. As a result mail would
2152 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2153 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2154 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2157 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2158 Main config options check_{log,spool}_{inodes,space} are now
2159 100 inodes, 10MB unless set otherwise in the configuration.
2161 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2162 Previously it only applied to the main-section connection policy
2165 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2167 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2168 by me. Added RFC7919 DH primes as an alternative.
2170 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2171 are not in the system include path.
2173 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2174 GnuTLS, when a session startup failed (eg because the client disconnected)
2175 Exim did stdio operations after fclose. This was exposed by a recent
2176 change which nulled out the file handle after the fclose.
2178 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2179 signed directly by the cert-signing cert, rather than an intermediate
2180 OCSP-signing cert. This is the model used by LetsEncrypt.
2182 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2184 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2185 an incoming connection.
2187 HS/02 Bug 1802: Do not half-close the connection after sending a request
2190 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2191 fallback to "prime256v1".
2193 JH/34 SECURITY: Use proper copy of DATA command in error message.
2194 Could leak key material. Remotely exploitable. CVE-2016-9963.
2200 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2201 and 3.4.4 - once the server is enabled to respond to an OCSP request
2202 it does even when not requested, resulting in a stapling non-aware
2203 client dropping the TLS connection.
2205 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2206 support variable-length bit vectors. No functional change.
2208 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2209 The I= interface field on outgoing lines is now after the H= remote
2210 host field, same as incoming lines. There is a separate
2211 outgoing_interface log selector which allows you to disable the
2214 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2215 If not running log_selector +smtp_connection the mainlog would be held
2216 open indefinitely after a "too many connections" event, including to a
2217 deleted file after a log rotate. Leave the per net connection logging
2218 leaving it open for efficiency as that will be quickly detected by the
2219 check on the next write.
2221 HS/01 Bug 1671: Fix post transport crash.
2222 Processing the wait-<transport> messages could crash the delivery
2223 process if the message IDs didn't exist for some reason. When
2224 using 'split_spool_directory=yes' the construction of the spool
2225 file name failed already, exposing the same netto behaviour.
2227 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2228 mime_regex ACL conditions.
2230 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2231 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2232 to HELO, local diagnostic string.
2234 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2235 log line to debug. Even when configured with a tls authenticator many
2236 client connections are expected to not authenticate in this way, so
2237 an authenticate fail is not an error.
2239 HS/02 Add the Exim version string to the process info. This way exiwhat
2240 gives some more detail about the running daemon.
2242 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2243 matter for fast-change records such as DNSBLs.
2245 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2246 retry record, even if constant. There may be multiple transports with
2247 different interface settings and the retry behaviour needs to be kept
2250 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2252 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2254 JH/10 Bug 840: fix log_defer_output option of pipe transport
2256 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2257 hosts_randomize. This matters a lot when combined with mua_wrapper.
2259 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2260 ${quote_pgsql:<string>} operator.
2262 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2264 JH/14 Change header file name for freeradius-client. Relevant if compiling
2265 with Radius support; from the Gentoo tree and checked under Fedora.
2267 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2269 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2270 option transport_filter, meaning no filtering.
2272 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2274 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2275 defaults to "*" (all hosts). The variable is now available when not built
2276 with TLS, default unset, mainly to enable keeping the testsuite sane.
2277 If a server certificate is not supplied (via tls_certificate) an error is
2278 logged, and clients will find TLS connections fail on startup. Presumably
2279 they will retry in-clear.
2280 Packagers of Exim are strongly encouraged to create a server certificate
2281 at installation time.
2283 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2284 with the $config_file variable.
2286 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2287 in transport context, after the attempt, and per-recipient. The latter type
2288 is per host attempted. The event data is the error message, and the errno
2289 information encodes the lookup type (A vs. MX) used for the (first) host,
2290 and the trailing two digits of the smtp 4xx response.
2292 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2293 to write to mainlog (or rejectlog, paniclog) in the window between file
2294 creation and permissions/ownership being changed. Particularly affects
2295 installations where exicyclog is run as root, rather than exim user;
2296 result is that the running daemon panics and dies.
2298 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2300 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2301 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2302 "pri" and "weight". Note that the previous implicit priority given by the
2303 list order is no longer honoured.
2305 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2306 for DKIM processing.
2308 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2309 by defining SUPPORT_SOCKS.
2311 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2312 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2313 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2314 variables are renamed to proxy_{local,external}_{address,port}.
2316 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2317 for a build by defining SUPPORT_I18N
2319 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2320 of the query string, and make ${quote_redis:} do that quoting.
2322 JH/29 Move Events support from Experimental to mainline, enabled by default
2323 and removable for a build by defining DISABLE_EVENT.
2325 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2327 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2328 cached by the daemon.
2330 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2331 by defining LOOKUP_REDIS. The libhiredis library is required.
2333 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2334 keys are given for lookup.
2336 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2337 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2338 only supported when built with TLS support. The PolarSSL SHA routines
2339 are still used when the TLS library is too old for convenient support.
2341 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2342 openssl_options), for security. OpenSSL forces this from version 1.1.0
2343 server-side so match that on older versions.
2345 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2346 allocation for $value could be released as the expansion processing
2347 concluded, but leaving the global pointer active for it.
2349 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2350 and to use the domains and local_parts ACL conditions.
2352 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2353 incorrectly not doubled on cutthrough transmission, hence seen as a
2354 body-termination at the receiving system - resulting in truncated mails.
2355 Commonly the sender saw a TCP-level error, and retransmitted the message
2356 via the normal store-and-forward channel. This could result in duplicates
2357 received - but deduplicating mailstores were liable to retain only the
2358 initial truncated version.
2360 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2362 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2364 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2365 we're in there, support oversigning also; bug 1309.
2367 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2369 HS/04 Add support for keep_environment and add_environment options.
2371 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2372 either intentional arithmetic overflow during PRNG, or testing config-
2375 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2376 delivery resulted in actual delivery. Cancel cutthrough before DATA
2379 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2380 rejects a recipient: pass the reject to the originator.
2382 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2383 Many were false-positives and ignorable, but it's worth fixing the
2386 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2387 for the new environment-manipulation done at startup. Move the routines
2388 from being local to tls.c to being global via the os.c file.
2390 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2391 an extract embedded as result-arg for a map, the first arg for extract
2392 is unavailable so we cannot tell if this is a numbered or keyed
2393 extraction. Accept either.
2399 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2402 JH/02 The smtp transport option "multi_domain" is now expanded.
2404 JH/03 The smtp transport now requests PRDR by default, if the server offers
2407 JH/04 Certificate name checking on server certificates, when exim is a client,
2408 is now done by default. The transport option tls_verify_cert_hostnames
2409 can be used to disable this per-host. The build option
2410 EXPERIMENTAL_CERTNAMES is withdrawn.
2412 JH/05 The value of the tls_verify_certificates smtp transport and main options
2413 default to the word "system" to access the system default CA bundle.
2414 For GnuTLS, only version 3.0.20 or later.
2416 JH/06 Verification of the server certificate for a TLS connection is now tried
2417 (but not required) by default. The verification status is now logged by
2418 default, for both outbound TLS and client-certificate supplying inbound
2421 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2424 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2425 Status Notification (bounce) messages are now MIME format per RFC 3464.
2426 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2427 under the control of the dsn_advertise_hosts option, and routers may
2428 have a dsn_lasthop option.
2430 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2431 default, modifiable by a malware= option. The list separator for
2432 the options can now be changed in the usual way. Bug 68.
2434 JH/10 The smtp_receive_timeout main option is now expanded before use.
2436 JH/11 The incoming_interface log option now also enables logging of the
2437 local interface on delivery outgoing connections.
2439 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2440 if the interface and destination host and port all match.
2442 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2445 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2446 Patch from Andrew Lewis.
2448 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2449 now supports optional time-restrictions, weighting, and priority
2450 modifiers per server. Patch originally by <rommer@active.by>.
2452 JH/16 The spamd_address main option now supports a mixed list of local
2453 and remote servers. Remote servers can be IPv6 addresses, and
2454 specify a port-range.
2456 JH/17 Bug 68: The spamd_address main option now supports an optional
2457 timeout value per server.
2459 JH/18 Bug 1581: Router and transport options headers_add/remove can
2460 now have the list separator specified.
2462 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2465 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2468 JH/21 Support for the A6 type of dns record is withdrawn.
2470 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2471 rather than the verbs used.
2473 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2474 from 255 to 1024 chars.
2476 JH/24 Verification callouts now attempt to use TLS by default.
2478 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2479 are generic router options now. The defaults didn't change.
2481 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2482 Original patch from Alexander Shikoff, worked over by JH.
2484 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2485 files if ZCAT_COMMAND is not executable.
2487 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2489 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2491 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2492 Normally benign, it bites when the pair was led to by a CNAME;
2493 modern usage is to not canonicalize the domain to a CNAME target
2494 (and we were inconsistent anyway for A-only vs AAAA+A).
2496 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2498 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2499 when evaluating $sender_host_dnssec.
2501 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2502 $sender_helo_dnssec variable.
2504 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2506 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2508 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2510 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2511 documented as working, but never had. Support all but $spam_report.
2513 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2514 added for tls authenticator.
2516 HS/03 Add perl_taintmode main config option
2522 TL/01 When running the test suite, the README says that variables such as
2523 no_msglog_check are global and can be placed anywhere in a specific
2524 test's script, however it was observed that placement needed to be near
2525 the beginning for it to behave that way. Changed the runtest perl
2526 script to read through the entire script once to detect and set these
2527 variables, reset to the beginning of the script, and then run through
2528 the script parsing/test process like normal.
2530 TL/02 The BSD's have an arc4random API. One of the functions to induce
2531 adding randomness was arc4random_stir(), but it has been removed in
2532 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2533 function when detected.
2535 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2536 cause callback expansion.
2538 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2539 syntax errors in an expansion can be treated as a string instead of
2540 logging or causing an error, due to the internal use of bool_lax
2541 instead of bool when processing it.
2543 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2544 server certificates when making smtp deliveries.
2546 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2548 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2550 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2552 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2553 Merged patch from Sebastian Wiedenroth.
2555 JH/05 Fix results-pipe from transport process. Several recipients, combined
2556 with certificate use, exposed issues where response data items split
2557 over buffer boundaries were not parsed properly. This eventually
2558 resulted in duplicates being sent. This issue only became common enough
2559 to notice due to the introduction of connection certificate information,
2560 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2562 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2563 size buffer was used, resulting in syntax errors when an expansion
2566 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2567 version 3.3.6 or later.
2569 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2570 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2571 both become "event_action", the variables become $event_name, $event_data
2572 and $event_defer_errno. There is a new variable $verify_mode, usable in
2573 routers, transports and related events. The tls:cert event is now also
2574 raised for inbound connections, if the main configuration event_action
2577 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2578 early OCSP support, but no stapling (appears to be less than 1.0.0).
2580 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2581 server certificate names available under the smtp transport option
2582 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2585 JH/10 Time-related extraction expansions from certificates now use the main
2586 option "timezone" setting for output formatting, and are consistent
2587 between OpenSSL and GnuTLS compilations. Bug 1541.
2589 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2590 encoded parameter in the incoming message. Bug 1558.
2592 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2593 include certificate info, eximon was claiming there were spoolfile
2596 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2598 JH/14 Log delivery-related information more consistently, using the sequence
2599 "H=<name> [<ip>]" wherever possible.
2601 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2602 are problematic for Debian distribution, omit them from the release
2605 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2607 JH/16 Fix string representation of time values on 64bit time_t architectures.
2610 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2611 output list separator was used.
2616 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2617 checkers that were complaining about end of non-void function with no
2620 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2621 This was a regression introduced in 4.83 by another bugfix.
2623 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2625 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2626 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2632 TF/01 Correctly close the server side of TLS when forking for delivery.
2634 When a message was received over SMTP with TLS, Exim failed to clear up
2635 the incoming connection properly after forking off the child process to
2636 deliver the message. In some situations the subsequent outgoing
2637 delivery connection happened to have the same fd number as the incoming
2638 connection previously had. Exim would try to use TLS and fail, logging
2639 a "Bad file descriptor" error.
2641 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2642 utilities have not been installed.
2644 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2645 temporary space as the ACL may create new global variables.
2647 TL/01 LDAP support uses per connection or global context settings, depending
2648 upon the detected version of the libraries at build time.
2650 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2651 to extract and use the src ip:port in logging and expansions as if it
2652 were a direct connection from the outside internet. PPv2 support was
2653 updated based on HAProxy spec change in May 2014.
2655 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2657 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2658 Properly escape header and check for NULL return.
2660 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2663 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2665 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2666 characters in header names, implemented as a verify condition.
2667 Contributed by Michael Fischer v. Mollard.
2669 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2670 results permerror and temperror. Previous values are deprecated but
2671 still accepted. In a future release, err_perm and err_temp will be
2672 completely removed, which will be a backward incompatibility if the
2673 ACL tests for either of these two old results. Patch contributed by
2674 user bes-internal on the mailing list.
2676 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2678 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2679 selectors, in both main and reject logs.
2681 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2684 JH/07 Add malware type "sock" for talking to simple daemon.
2686 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2688 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2689 routers/transports under cutthrough routing.
2691 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2692 numbers. Touch up "bool" conditional to keep the same definition.
2694 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2696 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2698 JH/12 Expand items in router/transport headers_add or headers_remove lists
2699 individually rather than the list as a whole. Bug 1452.
2701 Required for reasonable handling of multiple headers_ options when
2702 they may be empty; requires that headers_remove items with embedded
2703 colons must have them doubled (or the list-separator changed).
2705 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2706 view the policy declared in the DMARC record. Currently, $dmarc_status
2707 is a combined value of both the record presence and the result of the
2710 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2712 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2713 dnslookup router and the smtp transport (applying to the forward
2716 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2717 of ldap servers used for a specific lookup. Patch provided by Heiko
2720 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2721 New variable $lookup_dnssec_authenticated for observability.
2723 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2724 Patch submitted by Lars Timman.
2726 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2728 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2729 Requires trusted mode and valid format message id, aborts otherwise.
2730 Patch contributed by Heiko Schlichting.
2732 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2733 certextract with support for various fields. Bug 1358.
2735 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2736 is requested by default, modifiable by smtp transport option
2739 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2740 operate on certificate variables to give certificate fingerprints
2741 Also new ${sha256:cert_variable}.
2743 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2745 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2746 Christian Aistleitner.
2748 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2750 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2751 file. Patch from Wolfgang Breyha.
2753 JH/25 Expand the coverage of the delivery $host and $host_address to
2754 client authenticators run in verify callout. Bug 1476.
2756 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2757 align with daemon_smtp_ports. Bug 72.
2759 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2760 support and error reporting did not work properly.
2762 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2763 and is readable. Patch from Andrew Colin Kissa.
2765 TL/14 Enhance documentation of ${run expansion and how it parses the
2766 commandline after expansion, particularly in the case when an
2767 unquoted variable expansion results in an empty value.
2769 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2771 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2772 by renaming away from it. Addresses GH issue 15, reported by
2775 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2777 TL/15 SECURITY: prevent double expansion in math comparison functions
2778 (can expand unsanitized data). Not remotely exploitable.
2785 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2787 PP/02 Make -n do something, by making it not do something.
2788 When combined with -bP, the name of an option is not output.
2790 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2793 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2794 $sender_host_name and config options to manage this, and basic check
2797 PP/05 DSCP support for outbound connections and control modifier for inbound.
2799 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2800 (Only plugin which currently uses this is kerberos4, which nobody should
2801 be using, but we should make it available and other future plugins might
2802 conceivably use it, even though it would break NAT; stuff *should* be
2803 using channel bindings instead).
2805 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2806 name; added for Sendmail compatibility; requires admin caller.
2807 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2808 just ignore it); requires trusted caller.
2809 Also parse but ignore: -Ac -Am -X<logfile>
2812 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2814 TL/02 Add +smtp_confirmation as a default logging option.
2816 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2817 Patch by Magnus Holmgren from 2007-02-20.
2819 TL/04 Bugzilla 1281 - Spec typo.
2820 Bugzilla 1283 - Spec typo.
2821 Bugzilla 1290 - Spec grammar fixes.
2823 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2825 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2827 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2828 mailing list by by Dmitry Isaikin.
2830 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2832 JH/02 Support "G" suffix to numbers in ${if comparisons.
2834 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2836 NM/01 Bugzilla 1197 - Spec typo
2837 Bugzilla 1196 - Spec examples corrections
2839 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2841 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2842 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2845 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2846 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2848 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2849 "acl {{name}{arg}...}", and optional args on acl condition
2852 JH/05 Permit multiple router/transport headers_add/remove lines.
2854 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2856 JH/07 Avoid using a waiting database for a single-message-only transport.
2857 Performance patch from Paul Fisher. Bugzilla 1262.
2859 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2862 JH/09 Add $headers_added variable, with content from use of ACL modifier
2863 add_header (but not yet added to the message). Bugzilla 199.
2865 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2866 Pulled from Bugzilla 817 by Wolfgang Breyha.
2868 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2870 (nb: this is the same fix as in Exim 4.80.1)
2872 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2875 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2878 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2880 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2881 advertise SMTP AUTH mechanism to us, instead of a generic
2882 protocol violation error. Also, make Exim more robust to bad
2883 data from the Dovecot auth socket.
2885 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2887 When a queue runner is handling a message, Exim first routes the
2888 recipient addresses, during which it prunes them based on the retry
2889 hints database. After that it attempts to deliver the message to
2890 any remaining recipients. It then updates the hints database using
2893 So if a recipient address works intermittently, it can get repeatedly
2894 deferred at routing time. The retry hints record remains fresh so the
2895 address never reaches the final cutoff time.
2897 This is a fairly common occurrence when a user is bumping up against
2898 their storage quota. Exim had some logic in its local delivery code
2899 to deal with this. However it did not apply to per-recipient defers
2900 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2902 This change adds a proper retry rule check during routing so that the
2903 final cutoff time is checked against the message's age. We only do
2904 this check if there is an address retry record and there is not a
2905 domain retry record; this implies that previous attempts to handle
2906 the address had the retry_use_local_parts option turned on. We use
2907 this as an approximation for the destination being like a local
2908 delivery, as in LMTP.
2910 I suspect this new check makes the old local delivery cutoff check
2911 redundant, but I have not verified this so I left the code in place.
2913 TF/02 Correct gecos expansion when From: is a prefix of the username.
2915 Test 0254 submits a message to Exim with the header
2919 When I ran the test suite under the user fanf2, Exim expanded
2920 the header to contain my full name, whereas it should have added
2921 a Resent-Sender: header. It erroneously treats any prefix of the
2922 username as equal to the username.
2924 This change corrects that bug.
2926 GF/01 DCC debug and logging tidyup
2927 Error conditions log to paniclog rather than rejectlog.
2928 Debug lines prefixed by "DCC: " to remove any ambiguity.
2930 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2932 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2933 Bug spotted by Jeremy Harris; was flawed since initial commit.
2934 Would have resulted in OCSP responses post-SNI triggering an Exim
2935 NULL dereference and crash.
2937 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2939 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2940 Bug detection, analysis and fix by Samuel Thibault.
2941 Bugzilla 1331, Debian bug #698092.
2943 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2945 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2946 Server implementation by Todd Lyons, client by JH.
2947 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2948 config variable "prdr_enable" controls whether the server
2949 advertises the facility. If the client requests PRDR a new
2950 acl_data_smtp_prdr ACL is called once for each recipient, after
2951 the body content is received and before the acl_smtp_data ACL.
2952 The client is controlled by both of: a hosts_try_prdr option
2953 on the smtp transport, and the server advertisement.
2954 Default client logging of deliveries and rejections involving
2955 PRDR are flagged with the string "PRDR".
2957 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2958 fclose(). Diagnosis by Todd Lyons.
2960 PP/17 Update configure.default to handle IPv6 localhost better.
2961 Patch by Alain Williams (plus minor tweaks).
2964 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2965 This is now consistent with GnuTLS, and is now documented: the
2966 previous undocumented portable approach to treating the option as
2967 unset was to force an expansion failure. That still works, and
2968 an empty string is now equivalent.
2970 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2971 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2972 not performing validation itself.
2974 PP/20 Added force_command boolean option to pipe transport.
2975 Patch from Nick Koston, of cPanel Inc.
2977 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2980 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2982 PP/21 Fix eximon continuous updating with timestamped log-files.
2983 Broken in a format-string cleanup in 4.80, missed when I repaired the
2984 other false fix of the same issue.
2985 Report and fix from Heiko Schlichting.
2988 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2989 Report from Prashanth Katuri.
2991 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2992 It's SecureTransport, so affects any MacOS clients which use the
2993 system-integrated TLS libraries, including email clients.
2995 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2996 using a MIME ACL for non-SMTP local injection.
2997 Report and assistance in diagnosis by Warren Baker.
2999 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
3001 JH/16 Fix comparisons for 64b. Bugzilla 1385.
3003 TL/09 Add expansion variable $authenticated_fail_id to keep track of
3004 last id that failed so it may be referenced in subsequent ACL's.
3006 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
3009 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
3010 ldap library initialization, allowing self-signed CA's to be
3011 used. Also properly sets require_cert option later in code by
3012 using NULL (global ldap config) instead of ldap handle (per
3013 session). Bug diagnosis and testing by alxgomz.
3015 TL/12 Enhanced documentation in the ratelimit.pl script provided in
3016 the src/util/ subdirectory.
3018 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
3019 renamed to Transport Post Delivery Action by Jeremy Harris, as
3022 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
3023 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
3024 redis_servers = needs to be configured which will be used by the redis
3025 lookup. Patch from Warren Baker, of The Packet Hub.
3027 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3029 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3030 hostname or reverse DNS when processing a host list. Used suggestions
3031 from multiple comments on this bug.
3033 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3035 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3036 Missed a few lines, added it to make the runtest require no keyboard
3039 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3040 contains upper case chars. Make router use caseful_local_part.
3042 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3043 support when GnuTLS has been built with p11-kit.
3049 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3051 This, or similar/improved, will also be change PP/11 of 4.82.
3057 PP/01 Handle short writes when writing local log-files.
3058 In practice, only affects FreeBSD (8 onwards).
3059 Bugzilla 1053, with thanks to Dmitry Isaikin.
3061 NM/01 Bugzilla 949 - Documentation tweak
3063 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3066 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3068 PP/02 Implemented gsasl authenticator.
3070 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3072 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3073 `pkg-config foo` for cflags/libs.
3075 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3076 with rest of GSASL and with heimdal_gssapi.
3078 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3079 `pkg-config foo` for cflags/libs for the TLS implementation.
3081 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3082 properties get this fed in as external SSF. A number of robustness
3083 and debugging improvements to the cyrus_sasl authenticator.
3085 PP/08 cyrus_sasl server now expands the server_realm option.
3087 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3088 Patch by Jeremy Harris.
3090 PP/10 Added dbmjz lookup type.
3092 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3094 PP/12 MAIL args handles TAB as well as SP, for better interop with
3095 non-compliant senders.
3096 Analysis and variant patch by Todd Lyons.
3098 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3099 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3100 Patch from Dirk Mueller <dmueller@suse.com>
3102 PP/13 tls_peerdn now print-escaped for spool files.
3103 Observed some $tls_peerdn in wild which contained \n, which resulted
3104 in spool file corruption.
3106 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3107 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3108 or write after TLS renegotiation, which otherwise led to messages
3111 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3112 as a tracking header (ie: a signed header comes before the signature).
3113 Patch from Wolfgang Breyha.
3115 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3116 comma-sep list; embedded commas doubled.
3118 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3120 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3122 Report and patch from Dmitry Banschikov.
3124 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3125 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3126 failures. We appear to now support TLS1.1+ with Exim.
3128 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3129 lets Exim select keys and certificates based upon TLS SNI from client.
3130 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3131 before an outbound SMTP session. New log_selector, +tls_sni.
3133 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3134 NULL dereference. Report and patch from Alun Jones.
3136 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3137 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3138 Not seeing resolver debug output on NetBSD, but suspect this is a
3139 resolver implementation change.
3141 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3142 Left warnings. Added "eximon gdb" invocation mode.
3144 PP/21 Defaulting "accept_8bitmime" to true, not false.
3146 PP/22 Added -bw for inetd wait mode support.
3148 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3149 locate the relevant includes and libraries. Made this the default.
3151 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3152 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3154 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3155 This may cause build issues on older platforms.
3157 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3158 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3159 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3160 Added SNI support via GnuTLS too.
3161 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3163 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3165 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3166 Applied second patch from Janne, implementing suggestion to default
3167 multiple-strings-in-record handling to match SPF spec.
3169 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3171 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3172 read-only, out of scope).
3173 Patch from Wolfgang Breyha, report from Stuart Northfield.
3175 PP/29 Fix three issues highlighted by clang analyser static analysis.
3176 Only crash-plausible issue would require the Cambridge-specific
3177 iplookup router and a misconfiguration.
3178 Report from Marcin Mirosław.
3180 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3182 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3183 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3184 As part of this, removing so much warning spew let me fix some minor
3185 real issues in debug logging.
3187 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3188 assignment on my part. Fixed.
3190 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3191 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3192 Janne Snabb (who went above and beyond: thank you).
3194 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3195 string otherwise requires a connection and a bunch more work and it's
3196 relatively easy to get wrong. Should also expose TLS library linkage
3199 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3200 64-bit ${eval} (JH/03).
3202 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3203 GNU libc to support some of the 64-bit stuff, should not lead to
3204 conflicts. Defined before os.h is pulled in, so if a given platform
3205 needs to override this, it can.
3207 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3208 protection layer was required, which is not implemented.
3209 Bugzilla 1254, patch from Wolfgang Breyha.
3211 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3212 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3213 tls_dhparam take prime identifiers. Also unbreak combination of
3214 OpenSSL+DH_params+TLSSNI.
3216 PP/39 Disable SSLv2 by default in OpenSSL support.
3222 PP/01 Solaris build fix for Oracle's LDAP libraries.
3223 Bugzilla 1109, patch from Stephen Usher.
3225 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3227 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3230 TF/02 Fix a couple more cases where we did not log the error message
3231 when unlink() failed. See also change 4.74-TF/03.
3233 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3234 lock up or crash if it happened to be inside a call to libc when it
3235 got a SIGUSR1 from exiwhat.
3237 The SIGUSR1 handler appends the current process status to the process
3238 log which is later printed by exiwhat. It used to use the general
3239 purpose logging code to do this, but several functions it calls are
3240 not safe for signals.
3242 The new output code in the SIGUSR1 handler is specific to the process
3243 log, and simple enough that it's easy to inspect for signal safety.
3244 Removing some special cases also simplifies the general logging code.
3245 Removing the spurious timestamps from the process log simplifies
3248 TF/04 Improved ratelimit ACL condition.
3250 The /noupdate option has been deprecated in favour of /readonly which
3251 has clearer semantics. The /leaky, /strict, and /readonly update modes
3252 are mutually exclusive. The update mode is no longer included in the
3253 database key; it just determines when the database is updated. (This
3254 means that when you upgrade Exim will forget old rate measurements.)
3256 Exim now checks that the per_* options are used with an update mode that
3257 makes sense for the current ACL. For example, when Exim is processing a
3258 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3259 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3260 must specify per_mail/readonly. If you omit the update mode it defaults to
3261 /leaky where that makes sense (as before) or /readonly where required.
3263 The /noupdate option is now undocumented but still supported for
3264 backwards compatibility. It is equivalent to /readonly except that in
3265 ACLs where /readonly is required you may specify /leaky/noupdate or
3266 /strict/noupdate which are treated the same as /readonly.
3268 A useful new feature is the /count= option. This is a generalization
3269 of the per_byte option, so that you can measure the throughput of other
3270 aggregate values. For example, the per_byte option is now equivalent
3271 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3273 The per_rcpt option has been generalized using the /count= mechanism
3274 (though it's more complicated than the per_byte equivalence). When it is
3275 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3276 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3277 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3278 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3279 Note that using per_rcpt with a non-readonly update mode in more than
3280 one ACL will cause the recipients to be double-counted. (The per_mail
3281 and per_byte options don't have this problem.)
3283 The handling of very low rates has changed slightly. If the computed rate
3284 is less than the event's count (usually one) then this event is the first
3285 after a long gap. In this case the rate is set to the same as this event's
3286 count, so that the first message of a spam run is counted properly.
3288 The major new feature is a mechanism for counting the rate of unique
3289 events. The new per_addr option counts the number of different
3290 recipients that someone has sent messages to in the last time period. It
3291 behaves like per_rcpt if all the recipient addresses are different, but
3292 duplicate recipient addresses do not increase the measured rate. Like
3293 the /count= option this is a general mechanism, so the per_addr option
3294 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3295 example, measure the rate that a client uses different sender addresses
3296 with the options per_mail/unique=$sender_address. There are further
3297 details in the main documentation.
3299 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3301 TF/06 Removed a few PCRE remnants.
3303 TF/07 Automatically extract Exim's version number from tags in the git
3304 repository when doing development or release builds.
3306 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3307 Bugzilla 879. Patch from Paul Fisher.
3309 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3310 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3313 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3315 PP/05 Variable $av_failed, true if the AV scanner deferred.
3316 Bugzilla 1078. Patch from John Horne.
3318 PP/06 Stop make process more reliably on build failure.
3319 Bugzilla 1087. Patch from Heiko Schlittermann.
3321 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3322 Bugzilla 1089. Patch from Heiko Schlittermann.
3324 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3325 Bugzilla 1131. Patch from Holger Weiß.
3327 PP/09 Handle IPv6 addresses with SPF.
3328 Bugzilla 860. Patch from Wolfgang Breyha.
3330 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3332 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3335 PP/11 match_* no longer expand right-hand-side by default.
3336 New compile-time build option, EXPAND_LISTMATCH_RHS.
3337 New expansion conditions, "inlist", "inlisti".
3339 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3341 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3343 PP/14 fix log_write() format string regression from TF/03.
3344 Bugzilla 1152. Patch from Dmitry Isaikin.
3350 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3352 PP/02 Harmonised TLS library version reporting; only show if debugging.
3353 Layout now matches that introduced for other libraries in 4.74 PP/03.
3355 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3357 PP/04 New "dns_use_edns0" global option.
3359 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3362 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3363 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3365 TK/01 Updated PolarSSL code to 0.14.2.
3366 Bugzilla 1097. Patch from Andreas Metzler.
3368 PP/07 Catch divide-by-zero in ${eval:...}.
3369 Fixes bugzilla 1102.
3371 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3374 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3375 format-string attack -- SECURITY: remote arbitrary code execution.
3377 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3378 time unintentionally subject to list matching rules, letting the header
3379 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3380 arbitrary string expansion). This allowed for information disclosure.
3382 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3383 INT_MIN/-1 -- value coerced to INT_MAX.
3389 NM/01 Workaround for PCRE version dependency in version reporting
3392 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3393 This fixes portability to compilers other than gcc, notably
3394 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3396 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3397 makefiles for portability to HP-UX and POSIX correctness.
3399 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3400 Also via indented variable definition in the Makefile.
3401 (Debugging by Oliver Heesakkers).
3403 PP/02 Restore caching of spamd results with expanded spamd_address.
3404 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3406 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3407 Improves build reliability. Fix from: Frank Elsner
3409 NM/02 Fix wide character breakage in the rfc2047 coding
3410 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3412 NM/03 Allow underscore in dnslist lookups
3413 Fixes bug 1026. Patch from Graeme Fowler
3415 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3416 Code patches from Adam Ciarcinski of NetBSD.
3418 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3421 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3422 is logged, to avoid truncation. Patch from John Horne.
3424 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3425 Patch from Jakob Hirsch.
3427 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3428 SQL string expansion failure details.
3429 Patch from Andrey Oktyabrski.
3431 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3432 Patch from Simon Arlott.
3434 PP/09 New lookups functionality failed to compile on old gcc which rejects
3435 extern declarations in function scope.
3436 Patch from Oliver Fleischmann
3438 PP/10 Use sig_atomic_t for flags set from signal handlers.
3439 Check getgroups() return and improve debugging.
3440 Fixed developed for diagnosis in bug 927 (which turned out to be
3443 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3444 Patch from Mark Zealey.
3446 PP/12 Bugzilla 1056: Improved spamd server selection.
3447 Patch from Mark Zealey.
3449 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3450 Based on patch from Heiko Schlittermann.
3452 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3453 Patch from Uwe Doering, sign-off by Michael Haardt.
3455 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3456 variable declaration deep within a block. Bug and patch from
3459 PP/15 lookups-Makefile IRIX compatibility coercion.
3461 PP/16 Make DISABLE_DKIM build knob functional.
3463 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3464 Patch by Simon Arlott
3466 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3467 variable argument macros. Our copy now differs from upstream.
3473 TF/01 Failure to get a lock on a hints database can have serious
3474 consequences so log it to the panic log.
3476 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3477 controlled using the smtp_confirmation log selector.
3479 TF/03 Include the error message when we fail to unlink a spool file.
3481 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3482 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3483 for maintaining out-of-tree patches for some time.
3485 PP/01 Bugzilla 139: Documentation and portability issues.
3486 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3487 Handle per-OS dynamic-module compilation flags.
3489 PP/02 Let /dev/null have normal permissions.
3490 The 4.73 fixes were a little too stringent and complained about the
3491 permissions on /dev/null. Exempt it from some checks.
3492 Reported by Andreas M. Kirchwitz.
3494 PP/03 Report version information for many libraries, including
3495 Exim version information for dynamically loaded libraries. Created
3496 version.h, now support a version extension string for distributors
3497 who patch heavily. Dynamic module ABI change.
3499 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3500 privilege escalation vulnerability whereby the Exim run-time user
3501 can cause root to append content of the attacker's choosing to
3504 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3507 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3508 If dropping privileges for untrusted macros, we disabled normal logging
3509 on the basis that it would fail; for the Exim run-time user, this is not
3510 the case, and it resulted in successful deliveries going unlogged.
3511 Fixed. Reported by Andreas Metzler.
3517 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3518 only prepend for the Resent-* case. Fixes regression introduced in
3519 Exim 4.70 by NM/22 for Bugzilla 607.
3521 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3522 increasing numbers of administrators be bitten by this.
3524 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3526 PP/03 Bugzilla 994: added openssl_options main configuration option.
3528 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3530 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3532 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3534 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3535 without a peer certificate, leading to a segfault because of an
3536 assumption that peers always have certificates. Be a little more
3537 paranoid. Problem reported by Martin Tscholak.
3539 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3540 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3541 NB: ClamAV planning to remove STREAM in "middle of 2010".
3542 CL also introduces -bmalware, various -d+acl logging additions and
3543 more caution in buffer sizes.
3545 PP/09 Implemented reverse_ip expansion operator.
3547 PP/10 Bugzilla 937: provide a "debug" ACL control.
3549 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3551 PP/12 Bugzilla 973: Implement --version.
3553 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3555 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3557 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3559 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3560 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3561 ignore trailing whitespace.
3563 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3565 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3568 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3569 Notification from Dr Andrew Aitchison.
3571 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3572 ExtendedDetectionInfo response format.
3573 Notification from John Horne.
3575 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3578 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3579 XSL and documented dependency on system catalogs, with examples of how
3582 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3585 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3586 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3587 configuration file which is writeable by the Exim user or group.
3589 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3590 of configuration files to cover files specified with the -C option if
3591 they are going to be used with root privileges, not just the default
3594 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3595 option (effectively making it always true).
3597 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3598 files to be used while preserving root privileges.
3600 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3601 that rogue child processes cannot use them.
3603 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3604 run-time user, instead of root.
3606 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3607 Exim run-time user without dropping privileges.
3609 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3610 result string, instead of calling string_vformat() twice with the same
3613 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3614 for other users. Others should always drop root privileges if they use
3615 -C on the command line, even for a whitelisted configure file.
3617 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3619 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3625 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3626 $data_path, and $header_path variables; fixed documentation bugs and
3629 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3630 exipick to access non-standard spools, including the "frozen" queue
3633 NM/01 Bugzilla 965: Support mysql stored procedures.
3634 Patch from Alain Williams
3636 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3638 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3639 Patch from Andreas Metzler
3641 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3642 Patch from Kirill Miazine
3644 NM/05 Bugzilla 671: Added umask to procmail example.
3646 JJ/03 installed exipick 20100323.0, fixing doc bug
3648 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3649 directory. Notification and patch from Dan Rosenberg.
3651 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3653 TK/02 Improve log output when DKIM signing operation fails.
3655 MH/01 Treat the transport option dkim_domain as a colon separated
3656 list, not as a single string, and sign the message with each element,
3657 omitting multiple occurences of the same signer.
3659 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3660 Bugzilla 985, 986. Patch by Simon Arlott
3662 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3663 Patch by Simon Arlott
3665 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3666 MBX locking. Notification from Dan Rosenberg.
3672 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3674 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3676 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3678 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3680 NM/04 Bugzilla 915: Flag broken perl installation during build.
3686 TK/01 Added patch by Johannes Berg that expands the main option
3687 "spamd_address" if it starts with a dollar sign.
3689 TK/02 Write list of recipients to X-Envelope-Sender header when building
3690 the mbox-format spool file for content scanning (suggested by Jakob
3693 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3694 (http://www.dcc-servers.net/) support via dccifd. Activated by
3695 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3697 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3698 by Mark Daniel Reidel <mr@df.eu>.
3700 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3701 When building exim an external PCRE library is now needed -
3702 PCRE is a system library on the majority of modern systems.
3703 See entry on PCRE_LIBS in EDITME file.
3705 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3706 conversation. Added nologin parameter to request.
3707 Patch contributed by Kirill Miazine.
3709 TF/01 Do not log submission mode rewrites if they do not change the address.
3711 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3713 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3714 log files in place. Contributed by Roberto Lima.
3716 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3718 TF/03 Bugzilla 615: When checking the local_parts router precondition
3719 after a local_part_suffix or local_part_prefix option, Exim now
3720 does not use the address's named list lookup cache, since this
3721 contains cached lookups for the whole local part.
3723 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3724 Robert Millan. Documentation is in experimental-spec.txt.
3726 TF/04 Bugzilla 668: Fix parallel build (make -j).
3728 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3730 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3731 Patch provided by Jan Srzednicki.
3733 TF/05 Leading white space used to be stripped from $spam_report which
3734 wrecked the formatting. Now it is preserved.
3736 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3737 that they are available at delivery time.
3739 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3741 TF/08 TLS error reporting now respects the incoming_interface and
3742 incoming_port log selectors.
3744 TF/09 Produce a more useful error message if an SMTP transport's hosts
3745 setting expands to an empty string.
3747 NM/06 Bugzilla 744: EXPN did not work under TLS.
3748 Patch provided by Phil Pennock.
3750 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3751 Patch provided by Richard Godbee.
3753 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3754 acl_smtp_notquit, added index entry.
3756 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3757 Patch provided by Eugene Bujak.
3759 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3760 accept(). Patch provided by Maxim Dounin.
3762 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3763 Patch provided by Phil Pennock.
3765 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3767 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3768 Patch provided by Brad "anomie" Jorsch.
3770 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3771 Patch provided by Dean Brooks.
3773 TK/05 Add native DKIM support (does not depend on external libraries).
3775 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3776 Patch provided by Graeme Fowler.
3778 NM/16 Bugzilla 851: Documentation example syntax fix.
3780 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3782 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3785 NM/19 Bugzilla 745: TLS version reporting.
3786 Patch provided by Phil Pennock.
3788 NM/20 Bugzilla 167: bool: condition support.
3789 Patch provided by Phil Pennock.
3791 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3792 clients. Patch provided by Phil Pennock.
3794 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3795 Patch provided by Brad "anomie" Jorsch.
3797 NM/23 Bugzilla 687: Fix misparses in eximstats.
3798 Patch provided by Heiko Schlittermann.
3800 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3801 Patch provided by Heiko Schlittermann.
3803 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3804 plus update to original patch.
3806 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3808 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3809 Patch provided by David Brownlee.
3811 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3813 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3815 NM/30 Bugzilla 888: TLS documentation bugfixes.
3817 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3819 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3820 Unlike the original bugzilla I have changed all shell scripts in src tree.
3822 NM/33 Bugzilla 898: Transport filter timeout fix.
3823 Patch by Todd Rinaldo.
3825 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3826 Patch by Serge Demonchaux.
3828 NM/35 Bugzilla 39: Base64 decode bug fixes.
3829 Patch by Jakob Hirsch.
3831 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3833 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3835 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3837 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3843 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3844 ALT-N's libdkim that I have put here:
3845 http://duncanthrax.net/exim-experimental/
3847 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3848 were called 'true' and it seems that C99 defines that as a reserved
3849 keyword to be used with 'bool' variable types. That means you could
3850 not include C99-style headers which use bools without triggering
3851 build errors in sieve.c.
3853 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3854 as mailq or other aliases. Changed the --help handling significantly
3855 to do whats expected. exim_usage() emits usage/help information.
3857 SC/01 Added the -bylocaldomain option to eximstats.
3859 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3861 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3863 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3869 PH/01 Another patch from the Sieve maintainer.
3871 PH/02 When an IPv6 address is converted to a string for single-key lookup
3872 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3873 dots are used instead of colons so that keys in lsearch files need not
3874 contain colons. This was done some time before quoting was made available
3875 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3876 (notated using the quote facility) so as to distinguish them from IPv4
3877 keys. This meant that lookups for IP addresses in host lists did not work
3878 for iplsearch lookups.
3880 This has been fixed by arranging for IPv6 addresses to be expressed with
3881 colons if the lookup type is iplsearch. This is not incompatible, because
3882 previously such lookups could never work.
3884 The situation is now rather anomalous, since one *can* have colons in
3885 ordinary lsearch keys. However, making the change in all cases is
3886 incompatible and would probably break a number of configurations.
3888 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3891 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3892 conversion specification without a maximum field width, thereby enabling
3893 a rogue spamd server to cause a buffer overflow. While nobody in their
3894 right mind would setup Exim to query an untrusted spamd server, an
3895 attacker that gains access to a server running spamd could potentially
3896 exploit this vulnerability to run arbitrary code as the Exim user.
3898 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3899 $primary_hostname instead of what libspf2 thinks the hosts name is.
3901 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3902 a directory entry by the name of the lookup key. Previously, if a
3903 symlink pointed to a non-existing file or a file in a directory that
3904 Exim lacked permissions to read, a lookup for a key matching that
3905 symlink would fail. Now it is enough that a matching directory entry
3906 exists, symlink or not. (Bugzilla 503.)
3908 PH/03 The body_linecount and body_zerocount variables are now exported in the
3911 PH/04 Added the $dnslist_matched variable.
3913 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3914 This means they are set thereafter only if the connection becomes
3917 PH/06 Added the client_condition to authenticators so that some can be skipped
3918 by clients under certain conditions.
3920 PH/07 The error message for a badly-placed control=no_multiline_responses left
3921 "_responses" off the end of the name.
3923 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3925 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3926 (without spaces) instead of just copying the configuration text.
3928 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3930 PH/11 Added $max_received_linelength.
3932 PH/12 Added +ignore_defer and +include_defer to host lists.
3934 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3935 way in which PCRE > 7.0 is built.
3937 PH/14 Implemented queue_only_load_latch.
3939 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3940 MAIL command. The effect was to mangle the value on 64-bit systems.
3942 PH/16 Another patch from the Sieve maintainer.
3944 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3946 PH/18 If a system quota error occurred while trying to create the file for
3947 a maildir delivery, the message "Mailbox is full" was not appended to the
3948 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3949 only to a quota excession during the actual writing of the file.
3951 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3952 characters?) which causes problems in log lines. The DN values are now
3953 passed through string_printing() before being added to log lines.
3955 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3956 and InterBase are left for another time.)
3958 PH/21 Added message_body_newlines option.
3960 PH/22 Guard against possible overflow in moan_check_errorcopy().
3962 PH/23 POSIX allows open() to be a macro; guard against that.
3964 PH/24 If the recipient of an error message contained an @ in the local part
3965 (suitably quoted, of course), incorrect values were put in $domain and
3966 $local_part during the evaluation of errors_copy.
3972 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3973 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3976 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3977 issue a MAIL command.
3979 PH/02 In an ACL statement such as
3981 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3983 if a client was not listed at all, or was listed with a value other than
3984 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3985 the condition was not true (as it should be), so access was not denied.
3986 The bug was that the ! inversion was incorrectly passed on to the second
3987 item. This has been fixed.
3989 PH/03 Added additional dnslists conditions == and =& which are different from
3990 = and & when the dns lookup returns more than one IP address.
3992 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3993 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3995 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3996 FSYNC, which compiles an option called disable_fsync that allows for
3997 bypassing fsync(). The documentation is heavily laced with warnings.
3999 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
4001 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
4002 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
4003 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
4004 including adding "make clean"; (3) Added -fPIC when compiling the test
4005 dynamically loaded module, to get rid of a warning.
4007 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
4008 message fails, move_frozen_messages = true and ignore_bounce_errors_after
4009 = 0s. The bug is otherwise harmless.
4011 PH/07 There was a bug in the dovecot authenticator such that the value of
4012 $auth1 could be overwritten, and so not correctly preserved, after a
4013 successful authentication. This usually meant that the value preserved by
4014 the server_setid option was incorrect.
4016 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
4018 PH/09 Installed PCRE release 7.0.
4020 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
4021 run for batched SMTP input. It is now run at the start of every message
4022 in the batch. While fixing this I discovered that the process information
4023 (output by running exiwhat) was not always getting set for -bs and -bS
4024 input. This is fixed, and it now also says "batched" for BSMTP.
4026 PH/11 Added control=no_pipelining.
4028 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4029 patch, slightly modified), and move the expansion of helo_data till after
4030 the connection is made in the smtp transport (so it can use these
4033 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4035 PH/14 Added log_selector = +pid.
4037 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4039 PH/16 Add ${if forany and ${if forall.
4041 PH/17 Added dsn_from option to vary the From: line in DSNs.
4043 PH/18 Flush SMTP output before performing a callout, unless control =
4044 no_callout_flush is set.
4046 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4047 was true (the default) a successful delivery failed to delete the retry
4048 item, thus causing premature timeout of the address. The bug is now
4051 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4053 PH/21 Long custom messages for fakedefer and fakereject are now split up
4054 into multiline responses in the same way that messages for "deny" and
4055 other ACL rejections are.
4057 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4058 with slight modification.
4060 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4061 draft, changing the syntax and factoring some duplicate code".
4063 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4064 for deliveries of the second and subsequent messages over the same SMTP
4067 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4068 ${reduce, with only minor "tidies".
4070 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4072 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4073 expansion side effects.
4075 PH/27 When a message times out after an over-quota error from an Exim-imposed
4076 quota, the bounce message says "mailbox is full". This message was not
4077 being given when it was a system quota that was exceeded. It now should
4080 MH/03 Made $recipients available in local_scan(). local_scan() already has
4081 better access to the recipient list through recipients_list[], but
4082 $recipients can be useful in postmaster-provided expansion strings.
4084 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4085 in the case of a MAIL command with additional options following the
4086 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4087 were accidentally chopped off.
4089 PH/29 SMTP synchronization checks are implemented when a command is read -
4090 there is a check that no more input is waiting when there shouldn't be
4091 any. However, for some commands, a delay in an ACL can mean that it is
4092 some time before the response is written. In this time, more input might
4093 arrive, invalidly. So now there are extra checks after an ACL has run for
4094 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4095 pipelining has not been advertised.
4097 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4099 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4100 returned in the SMTP response when smtp_return_error_details was false.
4101 This has been fixed.
4103 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4104 instead of the C I/O that was originally supplied, because problems were
4105 reported on Solaris.
4107 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4108 Exim which did not show up earlier: it was assuming that a call to
4109 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4110 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4111 was a macro that became an assignment, so it seemed to work. This has
4112 changed to a proper function call with a void return, hence the compile
4113 error. Exim's code has been fixed.
4115 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4118 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4120 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4122 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4123 because it turns out to be too big or there is a timeout) there is no
4124 "Completed" line in the log. When some messages of this type were
4125 selected by exigrep, they were listed as "not completed". Others were
4126 picked up by some special patterns. I have improved the selection
4127 criteria to be more general.
4129 PH/38 The host_find_failed option in the manualroute router can now be set
4130 to "ignore", to completely ignore a host whose IP address cannot be
4131 found. If all hosts are ignored, the behaviour is controlled by the new
4132 host_all_ignored option.
4134 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4135 homing or because of multiple MX records with /mx) generated more than
4136 one IP address, and the following item turned out to be the local host,
4137 all the secondary addresses of the first item were incorrectly removed
4138 from the list, along with the local host and any following hosts (which
4139 is what is supposed to happen).
4141 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4142 whoever called Exim into the -H file. In the case of the daemon it was
4143 behaving confusingly. When first started, it used values for whoever
4144 started the daemon, but after a SIGHUP it used the Exim user (because it
4145 calls itself on a restart). I have changed the code so that it now always
4148 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4149 message are rejected with the same error (e.g. no authentication or bad
4150 sender address), and a DATA command is nevertheless sent (as can happen
4151 with PIPELINING or a stupid MUA), the error message that was given to the
4152 RCPT commands is included in the rejection of the DATA command. This is
4153 intended to be helpful for MUAs that show only the final error to their
4156 PH/42 Another patch from the Sieve maintainer.
4158 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4159 Eximstats - Fixed some broken HTML links and added missing column headers
4161 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4162 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4164 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4166 PH/43 Yet another patch from the Sieve maintainer.
4168 PH/44 I found a way to check for a TCP/IP connection going away before sending
4169 the response to the final '.' that terminates a message, but only in the
4170 case where the client has not sent further data following the '.'
4171 (unfortunately, this is allowed). However, in many cases there won't be
4172 any further data because there won't be any more messages to send. A call
4173 to select() can be used: if it shows that the input is "ready", there is
4174 either input waiting, or the socket has been closed. An attempt to read
4175 the next input character can distinguish the two cases. Previously, Exim
4176 would have sent an OK response which the client would never have see.
4177 This could lead to message repetition. This fix should cure that, at
4178 least in a lot of common cases.
4180 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4181 advertised in response to EHLO.
4187 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4188 fixed by 4.65/MH/01 (is this a record?) are fixed:
4190 (i) An empty string was always treated as zero by the numeric comparison
4191 operators. This behaviour has been restored.
4193 (ii) It is documented that the numeric comparison operators always treat
4194 their arguments as decimal numbers. This was broken in that numbers
4195 starting with 0 were being interpreted as octal.
4197 While fixing these problems I realized that there was another issue that
4198 hadn't been noticed. Values of message_size_limit (both the global option
4199 and the transport option) were treated as octal if they started with 0.
4200 The documentation was vague. These values are now always treated as
4201 decimal, and I will make that clear in the documentation.
4207 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4208 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4211 MH/01 Don't check that the operands of numeric comparison operators are
4212 integers when their expansion is in "skipping" mode (fixes bug
4213 introduced by 4.64-PH/07).
4215 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4216 child addresses, Exim now panics and dies. Previously, because the count
4217 is held in a short int, deliveries were likely to be lost. As such a
4218 large number of recipients for a single message is ridiculous
4219 (performance will be very, very poor), I have chosen to impose a limit
4220 rather than extend the field.
4226 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4227 leftover -K file (the existence of which was triggered by #402).
4228 While we were at it, introduced process PID as part of the -K
4229 filename. This should rule out race conditions when creating
4232 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4233 processing considerably. Previous code took too long for large mails,
4234 triggering a timeout which in turn triggers #401.
4236 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4237 in the DK code in transports.c. sendfile() is not really portable,
4238 hence the _LINUX specificness.
4240 TF/01 In the add_headers option to the mail command in an Exim filter,
4241 there was a bug that Exim would claim a syntax error in any
4242 header after the first one which had an odd number of characters
4245 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4246 callout verification, Exim cached a "reject" for the entire domain. This
4247 is correct for most verifications, but it is not correct for a recipient
4248 verification with use_sender or use_postmaster set, because in that case
4249 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4250 case of MAIL FROM:<> rejection from other early rejections (e.g.
4251 rejection of HELO). When verifying a recipient using a non-null MAIL
4252 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4253 Whatever the result of the callout, the value of the domain cache is
4254 left unchanged (for any other kind of callout, getting as far as trying
4255 RCPT means that the domain itself is ok).
4257 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4260 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4261 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4262 session, the daemon ignores ECONNECT errors and logs others; it now
4263 ignores EPIPE as well.
4265 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4266 (quoted-printable decoding).
4268 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4269 later the small subsequent patch to fix an introduced bug.
4271 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4273 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4275 PH/08 An error is now given if message_size_limit is specified negative.
4277 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4278 to be given (somewhat) arbitrary names.
4280 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4283 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4284 miscellaneous code fixes
4286 PH/10 Added the log_reject_target ACL modifier to specify where to log
4289 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4290 hostname. This is wrong, because it relates to the incoming message (and
4291 probably the interface on which it is arriving) and not to the outgoing
4292 callout (which could be using a different interface). This has been
4293 changed to use the value of the helo_data option from the smtp transport
4294 instead - this is what is used when a message is actually being sent. If
4295 there is no remote transport (possible with a router that sets up host
4296 addresses), $smtp_active_hostname is used.
4298 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4299 tweaks were necessary in order to get it to work (see also 21 below):
4300 (a) The code assumed that strncpy() returns a negative number on buffer
4301 overflow, which isn't the case. Replaced with Exim's string_format()
4303 (b) There were several signed/unsigned issues. I just did the minimum
4304 hacking in of casts. There is scope for a larger refactoring.
4305 (c) The code used strcasecmp() which is not a standard C function.
4306 Replaced with Exim's strcmpic() function.
4307 (d) The code set only $1; it now sets $auth1 as well.
4308 (e) A simple test gave the error "authentication client didn't specify
4309 service in request". It would seem that Dovecot has changed its
4310 interface. Fortunately there's a specification; I followed it and
4311 changed what the client sends and it appears to be working now.
4313 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4316 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4317 address A is aliased to B and C, where B exists and C does not. Without
4318 -v the output is "A verified" because verification stops after a
4319 successful redirection if more than one address is generated. However,
4320 with -v the child addresses are also verified. Exim was outputting "A
4321 failed to verify" and then showing the successful verification for C,
4322 with its parentage. It now outputs "B failed to verify", showing B's
4323 parentage before showing the successful verification of C.
4325 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4326 look up a TXT record in a specific list after matching in a combined
4329 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4330 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4331 they consult the DNS. I had assumed they would set it the way they
4332 wanted; and indeed my experiments on Linux seem to show that in some
4333 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4334 To be on the safe side, however, I have now made the interface to
4335 host_find_byname() similar to host_find_bydns(), with an argument
4336 containing the DNS resolver options. The host_find_byname() function now
4337 sets these options at its start, just as host_find_bydns() does. The smtp
4338 transport options dns_qualify_single and dns_search_parents are passed to
4339 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4340 of host_find_byname() use the default settings of RES_DEFNAMES
4341 (qualify_single) but not RES_DNSRCH (search_parents).
4343 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4344 spool_read_header() do less string testing, by means of a preliminary
4345 switch on the second character of optional "-foo" lines. (This is
4346 overdue, caused by the large number of possibilities that now exist.
4347 Originally there were few.) While I was there, I also converted the
4348 str(n)cmp tests so they don't re-test the leading "-" and the first
4349 character, in the hope this might squeeze out yet more improvement.
4351 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4352 flag allowing group syntax was set by the header_syntax check but not
4353 turned off, possible causing trouble later; (2) The flag was not being
4354 set at all for the header_verify test, causing "group"-style headers to
4355 be rejected. I have now set it in this case, and also caused header_
4356 verify to ignore an empty address taken from a group. While doing this, I
4357 came across some other cases where the code for allowing group syntax
4358 while scanning a header line wasn't quite right (mostly, not resetting
4359 the flag correctly in the right place). These bugs could have caused
4360 trouble for malformed header lines. I hope it is now all correct.
4362 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4363 with the "reply" argument non-NULL. The code, however (which originally
4364 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4365 but it didn't always do it. This confused somebody who was copying the
4366 code for some other use. I have removed all the tests.
4368 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4369 feature that was used to support insecure browsers during the U.S. crypto
4370 embargo. It requires special client support, and Exim is probably the
4371 only MTA that supported it -- and would never use it because real RSA is
4372 always available. This code has been removed, because it had the bad
4373 effect of slowing Exim down by computing (never used) parameters for the
4374 RSA_EXPORT functionality.
4376 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4377 authenticator to fail if there's a tab character in the incoming data
4378 (there should never be unless someone is messing about, as it's supposed
4379 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4380 if the connection is using TLS or if the remote IP is the same as the
4381 local IP, and the "valid-client-cert option" if a client certificate has
4384 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4385 authenticators. This can be used for authorization after authentication
4386 succeeds. (In the case of plaintext, it servers for both authentication
4389 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4390 if any retry times were supplied.
4392 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4393 connection, where there is no client IP address to check. In this
4394 situation, the verify now always succeeds.
4396 PH/25 Applied John Jetmore's -Mset patch.
4398 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4400 PH/27 In a string expansion for a processed (not raw) header when multiple
4401 headers of the same name were present, leading whitespace was being
4402 removed from all of them, but trailing whitespace was being removed only
4403 from the last one. Now trailing whitespace is removed from each header
4404 before concatenation. Completely empty headers in a concatenation (as
4405 before) are ignored.
4407 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4408 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4410 PH/29 [Removed. This was a change that I later backed out, and forgot to
4411 correct the ChangeLog entry (that I had efficiently created) before
4412 committing the later change.]
4414 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4415 address errors (4xx response to RCPT) over the same connection as other
4416 messages routed to the same hosts. Such deliveries are always "forced",
4417 so retry times are not inspected. This resulted in far too many retries
4418 for the affected addresses. The effect occurred only when there were more
4419 hosts than the hosts_max_try setting in the smtp transport when it had
4420 the 4xx errors. Those hosts that it had tried were not added to the list
4421 of hosts for which the message was waiting, so if all were tried, there
4422 was no problem. Two fixes have been applied:
4424 (i) If there are any address or message errors in an SMTP delivery, none
4425 of the hosts (tried or untried) are now added to the list of hosts
4426 for which the message is waiting, so the message should not be a
4427 candidate for sending over the same connection that was used for a
4428 successful delivery of some other message. This seems entirely
4429 reasonable: after all the message is NOT "waiting for some host".
4430 This is so "obvious" that I'm not sure why it wasn't done
4431 previously. Hope I haven't missed anything, but it can't do any
4432 harm, as the worst effect is to miss an optimization.
4434 (ii) If, despite (i), such a delivery is accidentally attempted, the
4435 routing retry time is respected, so at least it doesn't keep
4436 hammering the server.
4438 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4439 in ${readsocket because some servers need this prod.
4441 PH/32 Added some extra debug output when updating a wait-xxx database.
4443 PH/33 The hint "could be header name not terminated by colon", which has been
4444 given for certain expansion errors for a long time, was not being given
4445 for the ${if def:h_colon_omitted{... case.
4447 PH/34 The spec says: "With one important exception, whenever a domain list is
4448 being scanned, $domain contains the subject domain." There was at least
4449 one case where this was not true.
4451 PH/35 The error "getsockname() failed: connection reset by peer" was being
4452 written to the panic log as well as the main log, but it isn't really
4453 panic-worthy as it just means the connection died rather early on. I have
4454 removed the panic log writing for the ECONNRESET error when getsockname()
4457 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4458 runs only) independently of the message's sender address. This meant
4459 that, if the 4xx error was in fact related to the sender, a different
4460 message to the same recipient with a different sender could confuse
4461 things. In particular, this can happen when sending to a greylisting
4462 server, but other circumstances could also provoke similar problems.
4463 I have changed the default so that the retry time for these errors is now
4464 based a combination of the sender and recipient addresses. This change
4465 can be overridden by setting address_retry_include_sender=false in the
4468 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4469 remote server are returned as part of bounce messages. This was not
4470 happening for LMTP over a pipe (the lmtp transport), but now it is the
4471 same for both kinds of LMTP.
4473 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4474 in header lines that were in fact CNAMEs. This is no longer the case.
4476 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4477 and queue runs started by the daemon processed all messages. This has
4478 been fixed so that -R and -S can now usefully be given with -q<time>.
4480 PH/40 Import PCRE release 6.7 (fixes some bugs).
4482 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4484 PH/42 Give an error if -q is specified more than once.
4486 PH/43 Renamed the variables $interface_address and $interface_port as
4487 $received_ip_address and $received_port, to make it clear that these
4488 values apply to message reception, and not to the outgoing interface when
4489 a message is delivered. (The old names remain recognized, of course.)
4491 PH/44 There was no timeout on the connect() call when using a Unix domain
4492 socket in the ${readsocket expansion. There now is.
4494 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4495 be meaningful with "accept".
4497 SC/01 Eximstats V1.43
4498 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4500 SC/02 Eximstats V1.44
4501 Use a glob alias rather than an array ref in the generated
4502 parser. This improves both readability and performance.
4504 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4505 Collect SpamAssassin and rejection statistics.
4506 Don't display local sender or destination tables unless
4507 there is data to show.
4508 Added average volumes into the top table text output.
4510 SC/04 Eximstats V1.46
4511 Collect data on the number of addresses (recipients)
4512 as well as the number of messages.
4514 SC/05 Eximstats V1.47
4515 Added 'Message too big' to the list of mail rejection
4516 reasons (thanks to Marco Gaiarin).
4518 SC/06 Eximstats V1.48
4519 Mainlog lines which have GMT offsets and are too short to
4520 have a flag are now skipped.
4522 SC/07 Eximstats V1.49 (Alain Williams)
4523 Added the -emptyok flag.
4525 SC/08 Eximstats V1.50
4526 Fixes for obtaining the IP address from reject messages.
4528 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4529 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4530 whitespace changes from 4.64-PH/27
4532 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4535 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4536 are found, allow negative numbers in numeric criteria)
4538 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4540 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4541 to match changes made in 4.64-PH/43
4543 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4545 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4546 "domain" is actually an IP address, and force a failure. This locks out
4547 those revolvers/nameservers that support "A-for-A" lookups, in
4548 contravention of the specifications.
4550 PH/48 When a host name was looked up from an IP address, and the subsequent
4551 forward lookup of the name timed out, the host name was left in
4552 $sender_host_name, contrary to the specification.
4554 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4555 restricted to single-key lookups, Exim was not diagnosing an error if
4556 * or *@ was used with a query-style lookup.
4558 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4560 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4561 long ago, but noone interested enough thought of it. Let's just say that
4562 the "1.1" means that there are some new functions that weren't there at
4563 some point in the past.
4565 PH/51 Error processing for expansion failure of helo_data from an smtp
4566 transport during callout processing was broken.
4568 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4569 tested/used via the -bh/-bhc/-bs options.
4571 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4572 bug, fixed in subsequent PCRE releases).
4574 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4575 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4577 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4583 SC/01 Use a glob alias rather than an array ref in eximstats generated
4584 parser. This improves both readability and performance.
4586 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4587 Don't display local sender or destination tables in eximstats unless
4588 there is data to show.
4589 Added average volumes into the eximstats top table text output.
4591 SC/03 Collect data on the number of addresses (recipients) as well
4592 as the number of messages in eximstats.
4594 TF/01 Correct an error in the documentation for the redirect router. Exim
4595 does (usually) call initgroups() when daemonizing.
4597 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4598 with consistent privilege compared to when running as a daemon.
4600 TF/03 Note in the spec that $authenticated_id is not set for local
4601 submissions from trusted users.
4603 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4604 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4606 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4607 by adding some example configuration directives to the default
4608 configuration file. A little bit of work is required to uncomment the
4609 directives and define how usernames and passwords are checked, but
4610 there is now a framework to start from.
4612 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4613 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4614 without this. I don't know how relevant this is to other LDAP libraries.
4616 PH/02 Add the verb name to the "unknown ACL verb" error.
4618 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4620 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4622 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4623 directory not expanded when it should be if an expanded home directory
4624 was set for the address (which is overridden by the transport).
4626 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4629 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4630 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4631 because it is too late at that time, and has no effect.
4633 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4634 security issue with \' (bugzilla #107). I could not use the
4635 PQescapeStringConn() function, because it needs a PGconn value as one of
4638 PH/08 When testing addresses using -bt, indicate those final addresses that
4639 are duplicates that would not cause an additional delivery. At least one
4640 person was confused, thinking that -bt output corresponded to deliveries.
4641 (Suppressing duplicates isn't a good idea as you lose the information
4642 about possibly different redirections that led to the duplicates.)
4644 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4645 systems where poll() doesn't work, in particular OS X.
4647 PH/10 Added more information to debugging output for retry time not reached.
4649 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4650 operations in malware.c.
4652 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4655 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4656 syslog_duplication set false, log lines that would normally be written
4657 both the the main log and to the reject log were not written to syslog at
4660 PH/14 In the default configuration, change the use of "message" in ACL warn
4661 statements to "add_header".
4663 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4664 not followed by a command (e.g. "seen endif").
4666 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4667 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4670 PH/17 Added extra conditions to the default value of delay_warning_condition
4674 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4675 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4676 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4679 The Auto-Submitted: and various List- headers are standardised, whereas I
4680 don't think Precedence: ever was.
4682 PH/18 Refactored debugging code in route_finduser() to show more information,
4683 in particular, the error code if getpwnam() issues one.
4685 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4686 This is apparently needed in addition to the PH/07 change above to avoid
4687 any possible encoding problems.
4689 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4690 but not after initializing Perl.
4692 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4693 output them only if debugging. By default they are written stderr,
4694 apparently, which is not desirable.
4696 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4699 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4702 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4704 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4705 authenticated or an ident call has been made. Suppress the default
4706 values for $authenticated_id and $authenticated_sender (but permit -oMai
4707 and -oMas) when testing with -bh.
4709 PH/24 Re-jigged the order of the tests in the default configuration so that the
4710 tests for valid domains and recipients precede the DNS black list and CSA
4711 tests, on the grounds that those ones are more expensive.
4713 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4714 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4715 This bug exists in every version of Exim that I still have, right back to
4718 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4719 However, an attempt to turn on case-sensitivity in a regex key by
4720 including (?-i) didn't work because the subject string was already
4721 lowercased, and the effects were non-intuitive. It turns out that a
4722 one-line patch can be used to allow (?-i) to work as expected.
4728 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4729 other effects) broke the use of negated acl sub-conditions.
4731 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4734 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4735 "Deny" causes Exim to reject the incoming connection with a 554 error.
4736 Unfortunately, if there is a major crisis, such as a disk failure,
4737 tcp-wrappers gives "deny", whereas what one would like would be some
4738 kind of temporary error. A kludge has been added to help with this.
4739 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4740 554 error is used if errno is still zero or contains ENOENT (which occurs
4741 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4744 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4746 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4747 errors. Otherwise a message that provokes a temporary error (when other
4748 messages do not) can cause a whole host to time out.
4750 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4751 addresses were routed directly to files or pipes from a redirect router.
4752 File deliveries just didn't batch; pipe deliveries might have suffered
4755 PH/06 A failure to get a lock for a hints database would erroneously always say
4756 "Failed to get write lock", even when it was really a read lock.
4758 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4759 of 0600. This has been changed to use the value of the lockfile_mode
4760 option (which defaults to 0600).
4762 PH/08 Applied small patch from the Sieve maintainer.
4764 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4765 folder from quota calculations, a direct delivery into this folder messed
4766 up the contents of the maildirsize file. This was because the regex was
4767 used only to exclude .Trash (or whatever) when the size of the mailbox
4768 was calculated. There was no check that a delivery was happening into an
4769 excluded directory. This bug has been fixed by ignoring all quota
4770 processing for deliveries into excluded directories.
4772 PH/10 Added the maildirfolder_create_regex option to appendfile.
4778 PH/01 The code for finding all the local interface addresses on a FreeBSD
4779 system running IPv6 was broken. This may well have applied to all BSD
4780 systems, as well as to others that have similar system calls. The broken
4781 code found IPv4 interfaces correctly, but gave incorrect values for the
4782 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4783 that it would not match correctly against @[] and not recognize the IPv6
4786 PH/02 The ipliteral router was not recognizing addresses of the form user@
4787 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4789 PH/03 Added disable_ipv6.
4791 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4792 decoded form, because it is most often used to construct To: headers
4793 lines in autoreplies, and the decoded form may well be syntactically
4794 invalid. However, $reply_address has leading white space removed, and all
4795 newlines turned into spaces so that the autoreply transport does not
4798 PH/05 If group was specified without a user on a router, and no group or user
4799 was specified on a transport, the group from the router was ignored.
4801 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4802 for visible compile-time settings that can be used to change these
4803 numbers, for those that want even more. Backwards compatibility with old
4804 spool files has been maintained. However, going back to a previous Exim
4805 release will lost any variables that are in spool files.
4807 PH/07 Two small changes when running in the test harness: increase delay when
4808 passing a TCP/IP connection to a new process, in case the original
4809 process has to generate a bounce, and remove special handling of
4810 127.0.0.2 (sic), which is no longer necessary.
4812 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4813 be the same on different OS.
4815 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4818 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4819 whether --show-vars was specified or not
4821 JJ/02 exipick: Added support for new ACL variable spool format introduced
4824 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4825 syntactically invalid From: or Reply-to: line, and a filter used this to
4826 generate an autoreply, and therefore failed to obtain an address for the
4827 autoreply, Exim could try to deliver to a non-existent relative file
4828 name, causing unrelated and misleading errors. What now happens is that
4829 it logs this as a hard delivery error, but does not attempt to create a
4832 PH/11 The exinext utility has a -C option for testing purposes, but although
4833 the given file was scanned by exinext itself; it wasn't being passed on
4834 when Exim was called.
4836 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4837 an end-of-file indication when reading a command response.
4839 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4840 compiled. In many other places in Exim, IPv6 addresses are always
4841 recognized, so I have changed this. It also means that IPv4 domain
4842 literals of the form [IPV4:n.n.n.n] are now always recognized.
4844 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4845 used if the router is not running as root, for example, when verifying at
4846 ACL time, or when using -bh. The debugging output from this situation was
4847 non-existent - all you got was a failure to exec. I have made two
4850 (a) Failures to set uid/gid, the current directory, or a process leader
4851 in a subprocess such as that created by queryprogram now generate
4852 suitable debugging output when -d is set.
4854 (b) The queryprogram router detects when it is not running as root,
4855 outputs suitable debugging information if -d is set, and then runs
4856 the subprocess without attempting to change uid/gid.
4858 PH/15 Minor change to Makefile for building test_host (undocumented testing
4861 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4862 additional section of a DNS packet that returns MX or SRV records.
4863 Instead, it always explicitly searches for A/AAAA records. This avoids
4864 major problems that occur when a DNS server includes only records of one
4865 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4866 fixed another bug: if SRV records were looked up and the corresponding
4867 address records were *not* found in the additional section, the port
4868 values from the SRV records were lost.
4870 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4871 using the correct key (the original address) when searching the retry
4872 rules in order to find which one to use for generating the retry hint.
4874 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4875 adding the default one. Similarly, if it contains a Reply-To: header, the
4876 errors_reply_to option, if set, is not used.
4878 PH/19 When calculating a retry time, Exim used to measure the "time since
4879 failure" by looking at the "first failed" field in the retry record. Now
4880 it does not use this if it is later than than the arrival time of the
4881 message. Instead it uses the arrival time. This makes for better
4882 behaviour in cases where some deliveries succeed, thus re-setting the
4883 "first failed" field. An example is a quota failure for a huge message
4884 when small messages continue to be delivered. Without this change, the
4885 "time since failure" will always be short, possible causing more frequent
4886 delivery attempts for the huge message than are intended.
4887 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4889 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4890 $1, $2, $3) because the numerical variables can be reset during some
4891 expansion items (e.g. "match"), thereby losing the authentication data.
4893 PH/21 Make -bV show the size of off_t variables so that the test suite can
4894 decide whether to run tests for quotas > 2G.
4896 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4897 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4898 filecount value is greater than 2G or if a quota value is greater than 2G
4899 on a system where the size of off_t is not greater than 4, a panic error
4902 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4903 never match. The debug and -bh output now contains an explicit error
4904 message indicating a malformed IPv4 address or mask.
4906 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4907 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4908 PH/23 above applies.
4910 PH/25 Do not write to syslog when running in the test harness. The only
4911 occasion when this arises is a failure to open the main or panic logs
4912 (for which there is an explicit test).
4914 PH/26 Added the /no_tell option to "control=freeze".
4916 PH/27 If a host name lookup failed very early in a connection, for example, if
4917 the IP address matched host_lookup and the reverse lookup yielded a name
4918 that did not have a forward lookup, an error message of the form "no IP
4919 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4920 could be logged. Now it outputs the IP address instead of "NULL".
4922 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4923 allows the sender and the authenticated sender to be set when
4924 submitting a message from within Exim. Since child_open_exim() is
4925 documented for local_scan(), the new function should be too.
4927 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4928 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4929 results in an empty string is now treated as unset.
4931 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4933 PH/31 Added sender_verify_fail logging option.
4935 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4936 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4937 tidied the source and removed it altogether.
4939 PH/33 When a queue run was abandoned because the load average was too high, a
4940 log line was always written; now it is written only if the queue_run log
4941 selector is set. In addition, the log line for abandonment now contains
4942 information about the queue run such as the pid. This is always present
4943 in "start" and "stop" lines but was omitted from the "abandon" line.
4945 PH/34 Omit spaces between a header name and the colon in the error message that
4946 is given when verify = headers_syntax fails (if there are lots of them,
4947 the message gets confusing).
4949 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4950 names, as there are now some PTR records that contain slashes. This check
4951 is only to protect against broken name servers that fall over on strange
4952 characters, so the fact that it applies to all lookups doesn't matter.
4954 PH/36 Now that the new test suite is complete, we can remove some of the
4955 special code in Exim that was needed for the old test suite. For example,
4956 sorting DNS records because real resolvers return them in an arbitrary
4957 order. The new test suite's fake resolver always returns records in the
4960 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4961 bounces) except when queue_only is set, to avoid logging races between
4962 the different processes.
4964 PH/38 Panic-die if .include specifies a non-absolute path.
4966 PH/39 A tweak to the "H" retry rule from its user.
4968 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4969 a label. They prevented compilation on older perls.
4971 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4972 a warning to be raised on newish perls.
4974 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4975 on queue. Changes to match documented behaviour of showing count of
4976 messages matching specified criteria.
4978 PH/40 Changed the default ident timeout from 30s to 5s.
4980 PH/41 Added support for the use of login_cap features, on those BSD systems
4981 that have them, for controlling the resources used by pipe deliveries.
4983 PH/42 The content-scanning code uses fopen() to create files in which to put
4984 message data. Previously it was not paying any attention to the mode of
4985 the files. Exim runs with umask(0) because the rest of the code creates
4986 files with open(), and sets the required mode explicitly. Thus, these
4987 files were ending up world-writeable. This was not a big issue, because,
4988 being within the spool directory, they were not world-accessible. I have
4989 created a function called modefopen, which takes an additional mode
4990 argument. It sets umask(777), creates the file, chmods it to the required
4991 mode, then resets the umask. All the relevant calls to fopen() in the
4992 content scanning code have been changed to use this function.
4994 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4995 to 24 hours. This avoids potential overflow problems when processing G
4996 and H retry rules. I suspect nobody ever tinkers with this value.
4998 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
5000 PH/45 When the plaintext authenticator is running as a client, the server's
5001 challenges are checked to ensure they are valid base64 strings. By
5002 default, the authentication attempt is cancelled if an invalid string is
5003 received. Setting client_ignore_invalid_base64 true ignores these errors.
5004 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
5005 they are received. Thus, the responses can be made to depend on the
5006 challenges. If an invalid string is ignored, an empty string is placed in
5009 PH/46 Messages that are created by the autoreply transport now contains a
5010 References: header, in accordance with RFCs 2822 and 3834.
5012 PH/47 Added authenticated_sender_force to the smtp transport.
5014 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
5016 PH/49 Installed latest patch from the Sieve maintainer.
5018 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
5019 was also set, the appendfile transport was unnecessarily scanning a
5020 directory of message files (e.g. for maildir delivery) to find the count
5021 of files (along with the size), even though it did not need this
5022 information. It now does the scan only if it needs to find either the
5023 size of the count of files.
5025 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5027 PH/52 Two bugs concerned with error handling when the smtp transport is
5030 (i) Exim was not creating retry information for temporary errors given
5031 for individual recipients after the DATA command when the smtp transport
5032 was used in LMTP mode. This meant that they could be retried too
5033 frequently, and not timed out correctly.
5035 (ii) Exim was setting the flag that allows error details to be returned
5036 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5037 recipients that were returned after the DATA command.
5039 PH/53 This is related to PH/52, but is more general: for any failing address,
5040 when detailed error information was permitted to be returned to the
5041 sender, but the error was temporary, then after the final timeout, only
5042 "retry timeout exceeded" was returned. Now it returns the full error as
5043 well as "retry timeout exceeded".
5045 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5046 do this, and (what is worse) MTAs that accept it.
5048 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5049 will now be deprecated.
5051 PH/56 New os.c-cygwin from the Cygwin maintainer.
5053 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5054 formats (previously only available in exim formats via -bpr, -bpru,
5055 and -bpra. Now also available in native and exiqgrep formats)
5057 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5058 with very large, slow to parse queues
5060 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5062 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5064 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5065 responses to authentication challenges, though it was showing the
5066 challenges; (ii) I've removed the CR characters from the debug output for
5069 PH/58 Allow for the insertion of a newline as well as a space when a string
5070 is turned into more than one encoded-word during RFC 2047 encoding. The
5071 Sieve code now uses this.
5073 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5074 data_4xx, lost_connection, tls_required.
5076 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5077 message was being sent as an SMTP response.
5079 PH/61 Add -l and -k options to exicyclog.
5081 PH/62 When verifying, if an address was redirected to one new address, so that
5082 verification continued, and the new address failed or deferred after
5083 having set something in $address_data, the value of $address_data was not
5084 passed back to the ACL. This was different to the case when no
5085 redirection occurred. The value is now passed back in both cases.
5087 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5088 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5089 use login_cap.h, so on its own it isn't the distinguishing feature. The
5090 new name refers directly to the setclassresources() function.
5092 PH/65 Added configuration files for NetBSD3.
5094 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5096 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5097 is preferred over IPv4.
5099 PH/68 The bounce_return_message and bounce_return_body options were not being
5100 honoured for bounces generated during the reception of non-SMTP messages.
5101 In particular, this applied to messages rejected by the ACL. This bug has
5102 been fixed. However, if bounce_return_message is true and bounce_return_
5103 body is false, the headers that are returned for a non-SMTP message
5104 include only those that have been read before the error was detected.
5105 (In the case of an ACL rejection, they have all been read.)
5107 PH/69 The HTML version of the specification is now built in a directory called
5108 spec_html instead of spec.html, because the latter looks like a path with
5109 a MIME-type, and this confuses some software.
5111 PH/70 Catch two compiler warnings in sieve.c.
5113 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5114 function verify_get_ident() calls ip_connect() to connect a socket, but
5115 if the "connect()" function timed out, ip_connect() used to close the
5116 socket. However, verify_get_ident() also closes the socket later, and in
5117 between Exim writes to the log, which may get opened at this point. When
5118 the socket was closed in ip_connect(), the log could get the same file
5119 descriptor number as the socket. This naturally causes chaos. The fix is
5120 not to close the socket in ip_connect(); the socket should be closed by
5121 the function that creates it. There was only one place in the code where
5122 this was missing, in the iplookup router, which I don't think anybody now
5123 uses, but I've fixed it anyway.
5125 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5126 well as to direct DNS lookups. Otherwise the handling of names in host
5127 lists is inconsistent and therefore confusing.
5133 PH/01 Two changes to the default runtime configuration:
5135 (1) Move the checks for relay_from_hosts and authenticated clients from
5136 after to before the (commented out) DNS black list checks.
5138 (2) Add control=submission to the relay_from_hosts and authenticated
5139 clients checks, on the grounds that messages accepted by these
5140 statements are most likely to be submissions.
5142 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5144 (1) Generate an error if the third argument for the ${prvs expansion is
5147 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5150 (3) Reset the variables that are obtained from the first argument of
5151 ${prvscheck and used in the second argument before leaving the code,
5152 because their memory is reclaimed, so using them afterwards may do
5155 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5156 one (it's much easier than Tom thought :-).
5158 (5) Because of (4), we can now allow for the use of $prvscheck_result
5159 inside the third argument.
5161 PH/03 For some reason, the default setting of PATH when running a command from
5162 a pipe transport was just "/usr/bin". I have changed it to
5165 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5166 anything to be listed in the output from -bV.
5168 PH/05 When a filter generated an autoreply, the entire To: header line was
5169 quoted in the delivery log line, like this:
5171 => >A.N.Other <ano@some.domain> <original@ddress> ...
5173 This has been changed so that it extracts the operative address. There
5174 may be more than one such address. If so, they are comma-separated, like
5177 => >ano@some.domain,ona@other.domain <original@ddress> ...
5179 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5180 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5181 not being looked up in the rDNS to get a host name, Exim was showing the
5182 IP address twice in Received: lines, even though the IP addresses were
5183 identical. For example:
5185 Received: from [1.2.3.4] (helo=[1.2.3.4])
5187 However, if the real host name was known, it was omitting the HELO data
5188 if it matched the actual IP address. This has been tidied up so that it
5189 doesn't show the same IP address twice.
5191 PH/07 When both +timestamp and +memory debugging was on, the value given by
5192 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5193 called by the debug printing, thereby overwriting the timestamp buffer.
5194 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5196 PH/08 When the original message was included in an autoreply transport, it
5197 always said "this is a copy of the message, including all the headers",
5198 even if body_only or headers_only was set. It now gives an appropriate
5201 PH/09 Applied a patch from the Sieve maintainer which:
5203 o fixes some comments
5204 o adds the (disabled) notify extension core
5205 o adds some debug output for the result of if/elsif tests
5206 o points to the current vacation draft in the documentation
5207 and documents the missing references header update
5211 o fixes a bug in processing the envelope test (when testing
5212 multiple envelope elements, the last element determined the
5215 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5216 Electronic Mail") by including:
5218 Auto-submitted: auto-generated
5220 in the messages that it generates (bounce messages and others, such as
5221 warnings). In the case of bounce messages for non-SMTP messages, there was
5222 also a typo: it was using "Auto_submitted" (underscore instead of
5223 hyphen). Since every message generated by Exim is necessarily in response
5224 to another message, thes have all been changed to:
5226 Auto-Submitted: auto-replied
5228 in accordance with these statements in the RFC:
5230 The auto-replied keyword:
5232 - SHOULD be used on messages sent in direct response to another
5233 message by an automatic process,
5235 - MUST NOT be used on manually-generated messages,
5237 - MAY be used on Delivery Status Notifications (DSNs) and Message
5238 Disposition Notifications (MDNs),
5240 - MUST NOT be used on messages generated by automatic or periodic
5241 processes, except for messages which are automatic responses to
5244 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5245 to the default Received: header definition.
5247 PH/12 Added log selector acl_warn_skipped (default on).
5249 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5250 variables because (a) they are in the wrong storage pool and (b) even if
5251 they were copied, it wouldn't work properly because of the caching.
5253 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5254 checking when decoding. Apparently there are clients that generate
5255 overlong encoded strings. Why am I not surprised?
5257 PH/15 If the first argument of "${if match_address" was not empty, but did not
5258 contain an "@" character, Exim crashed. Now it writes a panic log message
5259 and treats the condition as false.
5261 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5263 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5264 extension "envelope-auth". The code is finished and in agreement with
5265 other implementations, but there is no documentation so far and in fact,
5266 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5267 not changing the active code.
5269 Print executed "if" and "elsif" statements when debugging is used. This
5270 helps a great deal to understand what a filter does.
5272 Document more things not specified clearly in RFC3028. I had all this
5273 sorted out, when out of a sudden new issues came to my mind. Oops."
5275 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5278 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5279 canonical form (as documented). However, after a host name lookup from
5280 the IP address, check_host() was doing a simple string comparison with
5281 addresses acquired from the DNS when checking that the found name did
5282 have the original IP as one of its addresses. Since any found IPv6
5283 addresses are likely to be in abbreviated form, the comparison could
5284 fail. Luckily, there already exists a function for doing the comparison
5285 by converting both addresses to binary, so now that is used instead of
5286 the text comparison.
5288 PH/20 There was another similar case to PH/19, when a complete host name was
5289 given in a host list; looking up its IP address could give an abbreviated
5290 form, whereas the current host's name might or might not be abbreviated.
5291 The same fix has been applied.
5297 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5298 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5301 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5302 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5304 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5306 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5307 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5308 Also, for "Auto-Submitted", treat anything other than "no" as
5309 non-personal, in accordance with RFC 3834. (Previously it treated
5310 anything starting "auto-" as non-personal.)
5312 TF/01 The control=submission/name=... option had a problem with syntax
5313 errors if the name included a slash character. The /name= option
5314 now slurps the rest of the string, so it can include any characters
5315 but it must come last in the list of options (after /sender_retain
5318 PH/05 Some modifications to the interface to the fake nameserver for the new
5326 TK/01 Added the "success_on_redirect" address verification option. See
5327 NewStuff for rationale and an example.
5329 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5331 PH/02 Patch to exigrep to allow it to work on syslog lines.
5333 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5334 fread() to skip over the body file's header line, because in Cygwin the
5335 header line is locked and is inaccessible.
5337 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5338 co-exist for some time) to make it clear that it is the Exim ID that is
5339 referenced, not the Message-ID: header line.
5341 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5342 string_format() function, because snprintf() does not exist on all
5345 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5346 ${stat: expansion item.
5348 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5349 protocol synchronization error", to keep the pedants happy.
5351 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5352 well as for IRIX systems, when gcc is being used. See the host.c source
5355 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5357 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5360 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5361 transport and to the smtp transport in LMTP mode.
5363 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5365 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5366 run a filter in a subprocess. This could lead to confusion in subsequent
5367 lookups in the parent process. There should also be a search_tidyup() at
5368 the end of the subprocess.
5370 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5371 only if the host matched helo_try_verify_hosts, which caused the
5372 verification to occur when the EHLO/HELO command was issued. The ACL just
5373 tested the remembered result. Now, if a previous verification attempt has
5374 not happened, "verify = helo" does it there and then.
5376 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5378 TK/03 Fix log output including CR from clamd.
5380 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5381 exist provoked a memory error which could cause a segfault.
5383 PH/15 Installed PCRE 6.2
5385 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5387 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5388 of the problem. Specifically, suggested +O2 rather than +O1 for the
5391 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5393 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5394 record, the port was not correctly logged when the outgoing_port log
5395 selector was set (it logged the transort's default port).
5397 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5398 fallback_hosts, and "hosts" in the smtp transport.
5400 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5401 host errors such as "Connection refused".
5403 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5404 authentication with radiusclient 0.4.9:
5406 - Error returned from rc_read_config was caught wrongly
5407 - Username/password not passed on to radius server due to wrong length.
5409 The presumption is that some radiusclient API changes for 4.51/PH/17
5410 were not taken care of correctly. The code is still untested by me (my
5411 Linux distribution still has 0.3.2 of radiusclient), but it was
5412 contributed by a Radius user.
5414 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5415 expanding the "port" option of the smtp transport.
5417 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5418 while reading a MIME header. Thanks to Tom Hughes for a patch.
5420 PH/24 Include config.h inside local_scan.h so that configuration settings are
5423 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5424 that in an ACL for RCPT (for example), you can examine exactly what was
5427 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5428 commands, but it was not correctly comparing the address with the actual
5429 client host address. Thus, it would show the EHLO address in Received:
5430 header lines when this was not necessary.
5432 PH/27 Added the % operator to ${eval:}.
5434 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5435 it should be ignoring failures (because with -C, for example, it has lost
5436 privilege). It wasn't ignoring creation failures other than "already
5439 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5442 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5443 because an input line was too long, either on its own, or by virtue of
5444 too many continuations, the temporary file was not being removed, and the
5445 return code was incorrect.
5447 PH/31 Missing "BOOL" in function definition in filtertest.c.
5449 PH/32 Applied Sieve patches from the maintainer.
5451 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5453 PH/33 Added "verify = not_blind".
5455 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5456 Local/Makefile (with some defaults set). These are used in built scripts
5457 such as exicyclog, but they have never been used in the exim_install
5458 script (though there are many overriding facilities there). I have
5459 arranged that the exim_install script now takes note of these two
5462 PH/35 Installed configuration files for Dragonfly.
5464 PH/36 When a locally submitted message by a trusted user did not contain a
5465 From: header, and the sender address was obtained from -f or from an SMTP
5466 MAIL command, and the trusted user did not use -F to supply a sender
5467 name, $originator_name was incorrectly used when constructing a From:
5468 header. Furthermore, $originator_name was used for submission mode
5469 messages from external hosts without From: headers in a similar way,
5470 which is clearly wrong.
5472 PH/37 Added control=suppress_local_fixups.
5474 PH/38 When log_selector = +received_sender was set, and the addition of the
5475 sender made the log line's construction buffer exactly full, or one byte
5476 less than full, an overflow happened when the terminating "\n" was
5479 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5480 when the result of a list match is failure because a DNS lookup failed.
5482 PH/40 RM_COMMAND is now used in the building process.
5484 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5485 the "build-* directories that it finds.
5487 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5488 address in a domain literal was a prefix of an interface address.
5490 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5491 when verifying a sender address, unless rewrite_headers is false.
5493 PH/44 Wrote a long comment about why errors_to addresses are verified as
5494 recipients, not senders.
5496 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5497 the ratelimit ACL was added.
5499 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5501 PH/46 Added extra information about PostgreSQL errors to the error string.
5503 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5504 avoiding the need to install special zones in a real server. This is
5505 backwards compatible; if it can't find the fake resolver, it drops back.
5506 Thus, both old and new test suites can be run.
5508 TF/02 Added util/ratelimit.pl
5510 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5511 clock is set back in time.
5513 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5514 Candler <B.Candler@pobox.com>.
5516 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5517 OK for addresses that are the result of redirections.
5519 PH/48 A number of further additions for the benefit of the new test suite,
5520 including a fake gethostbyname() that interfaces to the fake DNS resolver
5523 TF/06 The fix for widen_domains has also been applied to qualify_single and
5524 search_parents which are the other dnslookup options that can cause
5527 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5530 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5532 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5533 service" if it encountered an MX record with an empty target hostname.
5534 The message is now "an MX or SRV record indicated no SMTP service".
5536 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5537 if the DNS of the sending site is misconfigured. This is quite a
5538 common situation. This change restores the behaviour of treating a
5539 helo verification defer as a failure.
5541 PH/51 If self=fail was set on a router, the bounce message did not include the
5542 actual error message.
5548 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5550 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5551 command itself ended in error, the underlying message about the transport
5552 filter timeout was being overwritten with the pipe command error. Now the
5553 underlying error message should be appended to the second error message.
5555 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5557 PH/02 Reduce the amount of output that "make" produces by default. Full output
5558 can still be requested.
5560 PH/03 The warning log line about a condition test deferring for a "warn" verb
5561 was being output only once per connection, rather than after each
5562 occurrence (because it was using the same function as for successful
5563 "warn" verbs). This seems wrong, so I have changed it.
5565 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5566 it should not have, which might have caused a crash in the right
5567 circumstances, but probably never did.
5569 PH/04 Installed a modified version of Tony Finch's patch to make submission
5570 mode fix the return path as well as the Sender: header line, and to
5571 add a /name= option so that you can make the user's friendly name appear
5574 TF/03 Added the control = fakedefer ACL modifier.
5576 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5577 Mark Lowes for thorough testing.
5579 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5581 TK/03 Merged latest SRS patch from Miles Wilton.
5583 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5584 with the definition in sysexits.h (which is #included earlier).
5585 Fortunately, Exim does not actually use EX_OK. The code used to try to
5586 preserve the sysexits.h value, by assuming that macro definitions were
5587 scanned for macro replacements. I have been disabused of this notion,
5588 so now the code just undefines EX_OK before #including unistd.h.
5590 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5591 in the smtp transport. When a block could not be written in a single
5592 write() function, the timeout was being re-applied to each part-write.
5593 This seems wrong - if the receiver was accepting one byte at a time it
5594 would take for ever. The timeout is now adjusted when this happens. It
5595 doesn't have to be particularly precise.
5597 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5598 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5600 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5601 without a domain if the check to <postmaster@domain> fails.
5603 SC/01 Eximstats: added -xls and the ability to specify output files
5604 (patch written by Frank Heydlauf).
5606 SC/02 Eximstats: use FileHandles for outputting results.
5608 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5610 SC/04 Eximstats: fixed display of large numbers with -nvr option
5612 SC/05 Eximstats: fixed merging of reports with empty tables.
5614 SC/06 Eximstats: added the -include_original_destination flag
5616 SC/07 Eximstats: removed tabs and trailing whitespace.
5618 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5620 TK/06 MBOX spool code: Add real "From " MBOX separator line
5621 so the .eml file is really in mbox format (even though
5622 most programs do not really care). Patch from Alex Miller.
5624 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5625 The latter is generated from $received_to and is only set if the
5626 message has one envelope recipient. SA can use these headers,
5627 obviously out-of-the-box. Patch from Alex Miller.
5629 PH/08 The ${def test on a variable was returning false if the variable's
5630 value was "0", contrary to what the specification has always said!
5631 The result should be true unless the variable is empty.
5633 PH/09 The syntax error of a character other than { following "${if
5634 def:variable_name" (after optional whitespace) was not being diagnosed.
5635 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5636 accidental colon was present, for example, could give incorrect results.
5638 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5639 result is used (not including appendfile, where other changes are about
5642 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5643 This involved changing a lot of size variables from int to off_t. It
5644 should work with maildirs and everything.
5646 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5647 spamd dying while we are connected to it.
5649 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5652 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5653 function for BDB 4.3.
5655 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5657 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5658 the sources for PCRE have been re-arranged and more files are now
5661 PH/15 The code I had for printing potentially long long variables in PH/11
5662 above was not the best (it lost precision). The length of off_t variables
5663 is now inspected at build time, and an appropriate printing format (%ld
5664 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5665 to be "long long int" or "long int". This is needed for the internal
5666 formatting function string_vformat().
5668 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5669 the configuration file to be ":syslog", then the script "guesses" where
5670 the logs files are, rather than using the compiled in default. In our
5671 case the guess is not the same as the compiled default, so the script
5672 suddenly stopped working when I started to use syslog. The patch checks
5673 to see if log_file_path is "". If so, it attempts to read it from exim
5674 with no configuration file to get the compiled in version, before it
5675 falls back to the previous guessing code."
5677 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5678 implementing BATV in an Exim configuration. See NewStuff for the gory
5681 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5682 Makefile that are specific to HP-UX.
5684 PH/18 If the "use_postmaster" option was set for a recipient callout together
5685 with the "random" option, the postmaster address was used as the MAIL
5686 FROM address for the random test, but not for the subsequent recipient
5687 test. It is now used for both.
5689 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5690 patch removes a few documentation additions to RFC 3028, because the
5691 latest draft now contains them. It adds the new en;ascii-case comparator
5692 and a new error check for 8bit text in MIME parts. Comparator and
5693 require names are now matched exactly. I enabled the subaddress
5694 extension, but it is not well tested yet (read: it works for me)."
5696 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5697 rework some of the code of TK/09 above to avoid the hardwired use of
5698 "%lld" and "long long". Replaced the call to snprintf() with a call to
5701 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5702 records point to non-existent hosts", "retry timeout exceeded", and
5703 "retry time not reached for any host after a long failure period".
5705 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5706 experimental DomainKeys support:
5708 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5709 (2) On an error such as an illegally used "control", the wrong name for
5710 the control was given.
5712 These problems did NOT occur unless DomainKeys support was compiled.
5714 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5716 PH/24 Added ${if match_ip condition.
5718 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5719 databases so that it will be absolutely obvious if a crash occurs in the
5720 DB library. This is a regular occurrence (often caused by mis-matched
5723 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5724 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5725 picked up on a user's system that detects such things. There doesn't seem
5726 to be a gcc warning option for this - only an attribute that has to be
5727 put on the function's prototype. It seems that in Fedora Core 4 they have
5728 set this on a number of new functions. No doubt there will be more in due
5731 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5732 specify a transport. However, if an address that was verified by such a
5733 router was the subject of a callout, Exim crashed because it tried to
5734 read the rcpt_include_affixes from the non-existent transport. Now it
5735 just assumes that the setting of that option is false. This bug was
5736 introduced by 4.51/PH/31.
5738 PH/28 Changed -d+all to exclude +memory, because that information is very
5739 rarely of interest, but it makes the output a lot bigger. People tend to
5740 do -d+all out of habit.
5742 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5743 code in os-type was giving problems when libc.so lives in lib64, like on
5746 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5747 aren't the modern standard, and it seems that some systems' include files
5748 don't always have them. Exim was already checking for some of the newer
5749 ones like T_AAAA, and defining it itself. I've added checks for all the
5750 record types that Exim uses.
5752 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5753 not automatically generating a new one, as it is supposed to. This
5754 prevented TLS from working. If the file did exist, but contained invalid
5755 data, a new version was generated, as expected. It was only the case of a
5756 non-existent file that was broken.
5758 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5759 with a change in libdomainkeys > 0.64.
5761 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5762 from DNS. If the selector record carries the flag, it now has
5763 precedence over the domain-wide flag.
5765 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5767 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5768 the use of a port name that isn't defined in /etc/services) occurred, the
5769 message was deferred as in a normal delivery, and thus remained on the
5770 spool, instead of being failed because of the mua_wrapper setting. This
5771 is now fixed, and I tidied up some of the mua_wrapper messages at the
5774 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5775 the messages in a hash of arrays rather than using individual hashes.
5776 This is a bit cleaner and results in dramatic memory savings, albeit
5777 at a slight CPU cost.
5779 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5780 as requested by Marc Sherman.
5782 SC/10 Eximstats: added histograms for user specified patterns as requested
5785 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5787 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5788 fopen() in the content-scanning modules that did not already have it.
5794 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5795 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5797 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5799 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5801 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5802 to test Sieve filters that use "vacation".
5804 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5805 that changes the way the GnuTLS parameters are stored in the cache file.
5806 The new format can be generated externally. For backward compatibility,
5807 if the data in the cache doesn't make sense, Exim assumes it has read an
5808 old-format file, and it generates new data and writes a new file. This
5809 means that you can't go back to an older release without removing the
5812 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5813 work if there are any delivery delays because "one_time" forces the
5814 parent to be marked "delivered", so its unseen clone is never tried
5815 again. For this reason, Exim now forbids the simultaneous setting of
5818 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5819 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5820 entry if you want to know the details. The fix, however, neglected to
5821 consider the case when local delivery batching is involved. The test for
5822 "previously delivered" was not happening when checking to see if an
5823 address could be batched with a previous (undelivered) one; under
5824 certain circumstances this could lead to multiple deliveries to the same
5827 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5828 in its include files, and this causes problems building Exim.
5830 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5831 header_syntax) but Exim was just ignoring anything given after a slash.
5832 In particular, this caused confusion with an attempt to use "verify =
5833 reverse_host_lookup/defer_ok". An error is now given when options are
5834 supplied for verify items that do not have them. (Maybe reverse_host_
5835 lookup should have a defer_ok option, but that's a different point.)
5837 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5838 defined by RFC 821) to 2048, because there were problems with some AUTH
5839 commands, and RFC 1869 says the size should be increased for extended
5840 SMTP commands that take arguments.
5842 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5845 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5846 "unknown" error; now it says that the functionality isn't in the binary.
5848 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5849 an address' error message when a string expansion fails (syntax or
5850 whatever). Otherwise the password may appear in the log. Following change
5851 PH/42 below, there is no longer a chance of it appearing in a bounce
5854 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5856 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5857 of its addresses was ever tried. (Bugzilla bug #2.)
5859 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5860 the result incorrectly in the debug output. (It correctly added a newline
5861 to what was transported.)
5863 TF/01 Added $received_time.
5865 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5866 commented out examples of how to interface to a virus scanner and to
5867 SpamAssassin. Also added commented examples of av_scanner and
5868 spamd_address settings.
5870 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5871 and controls are allowed in which ACLs. There were a couple of minor
5872 errors. Some of the entries in the conditions table (which is a table of
5873 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5874 negation of where the condition IS allowed.
5876 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5878 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5879 header file does not have a version number, so I've had to invent a new
5880 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5881 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5882 radiusclient), but it was contributed by a Radius user.
5884 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5885 files or directories, for OpenSSL.
5887 PH/19 When an Exim process that is running as root has to create an Exim log
5888 file, it does so in a subprocess that runs as exim:exim so as to get the
5889 ownership right at creation (otherwise, other Exim processes might see
5890 the file with the wrong ownership). There was no test for failure of this
5891 fork() call, which would lead to the process getting stuck as it waited
5892 for a non-existent subprocess. Forks do occasionally fail when resources
5893 run out. I reviewed all the other calls to fork(); they all seem to check
5896 PH/20 When checking for unexpected SMTP input at connect time (before writing
5897 the banner), Exim was not dealing correctly with a non-positive return
5898 from the read() function. If the client had disconnected by this time,
5899 the result was a log entry for a synchronization error with an empty
5900 string after "input=" when read() returned zero. If read() returned -1
5901 (an event I could not check), uninitialized data bytes were printed.
5902 There were reports of junk text (parts of files, etc) appearing after
5905 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5907 PH/22 Added support for macro redefinition, and (re)definition in between
5908 driver and ACL definitions.
5910 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5911 forgetting to use the resulting value; it was using the unexpanded value.
5913 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5914 hadn't been configured. The fix is from Juergen Kreileder, who
5915 understands it better than I do:
5917 "Here's what I see happening with three configured cyrus_sasl
5918 authenticators configured (plain, login, cram-md5):
5920 On startup auth_cyrus_sasl_init() gets called for each of these.
5921 This means three calls to sasl_listmech() without a specified mech_list.
5922 => SASL tests which mechs of all available mechs actually work
5923 => three warnings about OTP not working
5924 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5926 With the patch, sasl_listmech() also gets called three times. But now
5927 SASL's mech_list option is set to the server_mech specified in the the
5928 authenticator. Or in other words, the answer from sasl_listmech()
5929 gets limited to just the mech you're testing for (which is different
5931 => the return list contains just 'plain' or 'login', 'cram-md5' or
5932 nothing depending on the value of ob->server_mech.
5934 I've just tested the patch: Authentication still works fine,
5935 unavailable mechs specified in the exim configuration are still
5936 caught, and the auth.log warnings about OTP are gone."
5938 PH/25 When debugging is enabled, the contents of the command line are added
5939 to the debugging output, even when log_selector=+arguments is not
5942 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5943 answer is "GNU", and only if the return is "GNU/something" is the answer
5946 PH/27 $acl_verify_message is now set immediately after the failure of a
5947 verification in an ACL, and so is available in subsequent modifiers. In
5948 particular, the message can be preserved by coding like this:
5950 warn !verify = sender
5951 set acl_m0 = $acl_verify_message
5953 Previously, $acl_verify_message was set only while expanding "message"
5954 and "log_message" when a very denied access.
5956 PH/28 Modified OS/os.c-Linux with
5958 -#ifndef OS_LOAD_AVERAGE
5959 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5961 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5962 nomenclature these days.)
5964 PH/29 Installed patch from the Sieve maintainer that adds the options
5965 sieve_useraddress and sieve_subaddress to the redirect router.
5967 PH/30 In these circumstances:
5968 . Two addresses routed to the same list of hosts;
5969 . First host does not offer TLS;
5970 . First host accepts first address;
5971 . First host gives temporary error to second address;
5972 . Second host offers TLS and a TLS session is established;
5973 . Second host accepts second address.
5974 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5975 and peerdn, if requested) that were in fact used only for the second
5978 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5979 attention to any local part prefix or suffix that was matched by the
5980 router that accepted the address. It now behaves in the same way as it
5981 does for delivery: the affixes are removed from the local part unless
5982 rcpt_include_affixes is set on the transport.
5984 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5985 timeout during the DATA phase of an incoming message.
5987 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5988 applied a patch sanctioned by the Sieve maintainer.
5990 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5991 the uid or gid is negative. A case of a negative gid caused this to be
5992 noticed. The fix allows for either to be negative.
5994 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5995 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5998 PH/36 The change PH/12 above was broken. Fixed it.
6000 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
6001 the grounds that routing the same address twice would always produce the
6002 same answer. This might have been true once, but it is certainly no
6003 longer true now. Routing a child address may depend on the previous
6004 routing that produced that child. Some complicated redirection strategies
6005 went wrong when messages had multiple recipients, and made Exim's
6006 behaviour dependent on the order in which the addresses were given.
6008 I have moved the duplicate checking until after the routing is complete.
6009 Exim scans the addresses that are assigned to local and remote
6010 transports, and removes any duplicates. This means that more work will be
6011 done, as duplicates will always all be routed, but duplicates are
6012 presumably rare, so I don't expect this is of any significance.
6014 For deliveries to pipes, files, and autoreplies, the duplicate checking
6015 still happens during the routing process, since they are not going to be
6018 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
6019 It corrects a timeout issue with spamd. This is Ian's comment: "The
6020 background is that sometimes spamd either never reads data from a
6021 connection it has accepted, or it never writes response data. The exiscan
6022 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
6023 blindly assumes that writes won't block so it may never time out."
6025 PH/39 Allow G after quota size as well as K and M.
6027 PH/40 The value set for $authenticated_id in an authenticator may not contain
6028 binary zeroes or newlines because the value is written to log lines and
6029 to spool files. There was no check on this. Now the value is run through
6030 the string_printing() function so that such characters are converted to
6031 printable escape sequences.
6033 PH/41 $message_linecount is a new variable that contains the total number of
6034 lines in the message. Compare $body_linecount, which is the count for the
6037 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6038 bounce and delay warning messages, except in certain special cases, which
6041 (a) An SMTP error message from a remote host;
6042 (b) A message specified in a :fail: redirection;
6043 (c) A message specified in a "fail" command in a system filter;
6044 (d) A message specified in a FAIL return from the queryprogram router;
6045 (e) A message specified by the cannot_route_message router option.
6047 In these cases only, Exim does include the error details in bounce and
6048 warning messages. There are also a few cases where bland messages such
6049 as "unrouteable address" or "local delivery error" are given.
6051 PH/43 $value is now also set for the "else" part of a ${run expansion.
6053 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6054 being worked on, but at least Exim now implements the latest version to
6057 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6058 process to complete was treated as a delivery failure, a timeout while
6059 writing the message to the pipe was logged, but erroneously treated as a
6060 successful delivery. Such timeouts include transport filter timeouts. For
6061 consistency with the overall process timeout, these timeouts are now
6062 treated as errors, giving rise to delivery failures by default. However,
6063 there is now a new Boolean option for the pipe transport called
6064 timeout_defer, which, if set TRUE, converts the failures into defers for
6065 both kinds of timeout. A transport filter timeout is now identified in
6068 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6069 systems where "make" and "gmake" are different, calling "gmake" at top
6070 level broke things. I've arranged for the value of $(MAKE) to be passed
6071 from the Makefile to this script so that it can call the same version of
6075 A note about Exim versions 4.44 and 4.50
6076 ----------------------------------------
6078 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6079 changes of various kinds. As a consequence, a big documentation update was
6080 needed. This delayed the release for rather longer than seemed good, especially
6081 in the light of a couple of (minor) security issues. Therefore, the changes
6082 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6083 release. So 4.44 and 4.50 are in effect two different branches that both start
6086 I have left the 4.50 change log unchanged; it contains all the changes since
6087 4.43. The change log for 4.44 is below; many of its items are identical to
6088 those for 4.50. This seems to be the most sensible way to preserve the
6089 historical information.
6095 1. Minor wording change to the doc/README.SIEVE file.
6097 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6098 computation of the current number of files was incorrect.
6100 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6101 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6104 4. Give more explanation in the error message when the command for a transport
6105 filter fails to execute.
6107 5. There are several places where Exim runs a non-Exim command in a
6108 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6109 was being done only for the command run by the queryprogram router. It is
6110 now done for all such subprocesses. The other cases are: ${run, transport
6111 filters, and the commands run by the lmtp and pipe transports.
6113 6. Added CONFIGURE_GROUP build-time option.
6115 7. Some older OS have a limit of 256 on the maximum number of file
6116 descriptors. Exim was using setrlimit() to set 1000 as a large value
6117 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6118 systems. I've change it so that if it can't get 1000, it tries for 256.
6120 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6121 was an oversight, and furthermore, ever since the addition of extra
6122 controls (e.g. 4.43/32), the checks on when to allow different forms of
6123 "control" were broken. There should now be diagnostics for all cases when a
6124 control that does not make sense is encountered.
6126 9. Added the /retain_sender option to "control=submission".
6128 10. $recipients is now available in the predata ACL (oversight).
6130 11. Tidy the search cache before the fork to do a delivery from a message
6131 received from the command line. Otherwise the child will trigger a lookup
6132 failure and thereby defer the delivery if it tries to use (for example) a
6133 cached ldap connection that the parent has called unbind on.
6135 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6136 of $address_data from the recipient verification was clobbered by the
6137 sender verification.
6139 13. The value of address_data from a sender verification is now available in
6140 $sender_address_data in subsequent conditions in the ACL statement.
6142 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6144 15. Added a new option "connect=<time>" to callout options, to set a different
6147 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6148 was its contents. (It was OK if the option was not defined at all.)
6150 17. A "Completed" log line is now written for messages that are removed from
6151 the spool by the -Mrm option.
6153 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6154 information about exactly what failed.
6156 19. Added -dd to debug only the daemon process.
6158 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6159 handles timeouts, both on the server side and network timeouts. Renamed the
6160 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6162 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6163 It is now set to "smtps".
6165 22. $host_address is now set to the target address during the checking of
6166 ignore_target_hosts.
6168 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6169 being passed; this would have caused $sender_host_name to have been used if
6170 matching the list had actually called for a host name (not very likely,
6171 since this list is usually IP addresses). A host name is now passed as
6174 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6175 code that specifies a non-restarting handler (typically sigaction() in
6176 modern systems) in an attempt to fix a rare and obscure crash bug.
6178 25. Narrowed the window for a race in the daemon that could cause it to ignore
6179 SIGCHLD signals. This is not a major problem, because they are used only to
6180 wake it up if nothing else does.
6182 26. A malformed maildirsize file could cause Exim to calculate negative values
6183 for the mailbox size or file count. Odd effects could occur as a result.
6184 The maildirsize information is now recalculated if the size or filecount
6187 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6188 support for a long time. Removed HAVE_SYS_VFS_H.
6190 28. Installed the latest version of exipick from John Jetmore.
6192 29. In an address list, if the pattern was not a regular expression, an empty
6193 subject address (from a bounce message) matched only if the pattern was an
6194 empty string. Non-empty patterns were not even tested. This was the wrong
6195 because it is perfectly reasonable to use an empty address as part of a
6196 database query. An empty address is now tested by patterns that are
6197 lookups. However, all the other forms of pattern expect the subject to
6198 contain a local part and a domain, and therefore, for them, an empty
6199 address still always fails if the pattern is not itself empty.
6201 30. Exim went into a mad DNS loop when attempting to do a callout where the
6202 host was specified on an smtp transport, and looking it up yielded more
6203 than one IP address.
6205 31. Re-factored the code for checking spool and log partition space into a
6206 function that finds that data and another that does the check. The former
6207 is then used to implement four new variables: $spool_space, $log_space,
6208 $spool_inodes, and $log_inodes.
6210 32. The RFC2047 encoding function was originally intended for short strings
6211 such as real names; it was not keeping to the 75-character limit for
6212 encoded words that the RFC imposes. It now respects the limit, and
6213 generates multiple encoded words if necessary. To be on the safe side, I
6214 have increased the buffer size for the ${rfc2047: expansion operator from
6217 33. It is now permitted to omit both strings after an "if" condition; if the
6218 condition is true, the result is "true". As before, when the second string
6219 is omitted, a false condition yields an empty string. This makes it less
6220 cumbersome to write custom ACL and router conditions.
6222 34. Failure to deliver a bounce message always caused it to be frozen, even if
6223 there was an errors_to setting on the router. The errors_to setting is now
6226 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6227 canonical form (fully expanded) before being placed in
6228 $sender_host_address.
6230 36. The table in the code that translates DNS record types into text (T_A to
6231 "A" for instance) was missing entries for NS and CNAME. It is just possible
6232 that this could have caused confusion if both these types were looked up
6233 for the same domain, because the text type is used as part of Exim's
6234 per-process caching. But the chance of anyone hitting this buglet seems
6237 37. The dnsdb lookup has been extended in a number of ways.
6239 (1) There is a new type, "zns", which walks up the domain tree until it
6240 finds some nameserver records. It should be used with care.
6242 (2) There is a new type, "mxh", which is like "mx" except that it returns
6243 just the host names, not the priorities.
6245 (3) It is now possible to give a list of domains (or IP addresses) to be
6246 looked up. The behaviour when one of the lookups defers can be
6247 controlled by a keyword.
6249 (4) It is now possible to specify the separator character for use when
6250 multiple records are returned.
6252 38. The dnslists ACL condition has been extended: it is now possible to supply
6253 a list of IP addresses and/or domains to be looked up in a particular DNS
6256 39. Added log_selector=+queue_time_overall.
6258 40. When running the queue in the test harness, wait just a tad after forking a
6259 delivery process, to get repeatability of debugging output.
6261 41. Include certificate and key file names in error message when GnuTLS fails
6262 to set them up, because the GnuTLS error message doesn't include the name
6263 of the failing file when there is a problem reading it.
6265 42. Allow both -bf and -bF in the same test run.
6267 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6269 44. The "Exiscan patch" is now merged into the mainline Exim source.
6271 45. Sometimes the final signoff response after QUIT could fail to get
6272 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6273 < 0 before doing a fflush(). This bug looks as though it goes back to the
6274 introduction of TLS in release 3.20, but "sometimes" must have been rare
6275 because the tests only now provoked it.
6277 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6278 (this can affect the format of dates).
6280 47. exim_tidydb, when checking for the continued existence of a message for
6281 which it has found a message-specific retry record, was not finding
6282 messages that were in split spool directories. Consequently, it was
6283 deleting retry records that should have stayed in existence.
6285 48. Steve fixed some bugs in eximstats.
6287 49. The SPA authentication driver was not abandoning authentication and moving
6288 on to the next authenticator when an expansion was forced to fail,
6289 contradicting the general specification for all authenticators. Instead it
6290 was generating a temporary error. It now behaves as specified.
6292 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6293 (the order specifies the preference for clients). The order is now AES256,
6294 AES128, 3DES, ARCFOUR128.
6296 51. Small patch to Sieve code - explicitly set From: when generating an
6299 52. Exim crashed if a remote delivery caused a very long error message to be
6300 recorded - for instance if somebody sent an entire SpamAssassin report back
6301 as a large number of 550 error lines. This bug was coincidentally fixed by
6302 increasing the size of one of Exim's internal buffers (big_buffer) that
6303 happened as part of the Exiscan merge. However, to be on the safe side, I
6304 have made the code more robust (and fixed the comments that describe what
6307 53. Now that there can be additional text after "Completed" in log lines (if
6308 the queue_time_overall log selector is set), a one-byte patch to exigrep
6309 was needed to allow it to recognize "Completed" as not the last thing in
6312 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6313 patch that reportedly fixes this has been added. I am not expert enough to
6314 create a test for it. This is what the patch creator wrote:
6316 "I found a little strange behaviour of ldap code when working with
6317 Windows 2003 AD Domain, where users was placed in more than one
6318 Organization Units. When I tried to give exim partial DN, the exit code
6319 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6320 But simultaneously result of request was absolutely normal ldap result,
6321 so I produce this patch..."
6323 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6324 REFERENCE, so I have modified the code to exclude the patch when that macro
6327 55. Some experimental protocols are using DNS PTR records for new purposes. The
6328 keys for these records are domain names, not reversed IP addresses. The
6329 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6330 leaves it alone. Component reversal etc. now happens only for IP addresses.
6333 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6335 57. Double the size of the debug message buffer (to 2048) so that more of very
6336 long debug lines gets shown.
6338 58. The exicyclog utility now does better if the number of log files to keep
6339 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6341 59. Two changes related to the smtp_active_hostname option:
6343 (1) $smtp_active_hostname is now available as a variable.
6344 (2) The default for smtp_banner uses $smtp_active_hostname instead
6345 of $primary_hostname.
6347 60. The host_aton() function is supposed to be passed a string that is known
6348 to be a valid IP address. However, in the case of IPv6 addresses, it was
6349 not checking this. This is a hostage to fortune. Exim now panics and dies
6350 if the condition is not met. A case was found where this could be provoked
6351 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6352 components; fortuitously, this particular loophole had already been fixed
6353 by change 4.50/55 above.
6355 If there are any other similar loopholes, the new check in host_aton()
6356 itself should stop them being exploited. The report I received stated that
6357 data on the command line could provoke the exploit when Exim was running as
6358 exim, but did not say which command line option was involved. All I could
6359 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6360 running as the user.
6363 61. There was a buffer overflow vulnerability in the SPA authentication code
6364 (which came originally from the Samba project). I have added a test to the
6365 spa_base64_to_bits() function which I hope fixes it.
6368 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6369 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6371 63. The daemon start-up calls getloadavg() while still root for those OS that
6372 need the first call to be done as root, but it missed one case: when
6373 deliver_queue_load_max is set with deliver_drop_privilege. This is
6374 necessary for the benefit of the queue runner, because there is no re-exec
6375 when deliver_drop_privilege is set.
6377 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6378 This has been fixed.
6380 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6381 was in use, was not putting the data itself into the right store pool;
6382 consequently, it could be overwritten for a subsequent message in the same
6383 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6386 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6388 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6389 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6390 the function were treating the return as a boolean value, which happened to
6391 work because 0=false and not-0=true, but is not correct code.
6393 68. The host_aton() function was not handling scoped IPv6 addresses (those
6394 with, for example, "%eth0" on the end) correctly.
6396 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6397 negated items (that is, ~something) in unsigned ints. Some compilers
6398 apparently mutter when there is no cast.
6400 70. If an address verification called from an ACL failed, and did not produce a
6401 user-specific message (i.e. there was only a "system" message), nothing was
6402 put in $acl_verify_message. In this situation, it now puts the system
6405 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6406 session; change 4.31/43 added the unwanted input to the log line - except
6407 that it did not do this in the start of session case. It now does.
6409 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6410 This is wrong and can cause the other end to generate a synchronization
6411 error if it is another Exim or anything else that does the synchronization
6412 check. A QUIT command is no longer sent after a timeout.
6414 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6415 during host lookups.
6417 74. The defer_ok option of callout verification was not working if it was used
6418 when verifying addresses in header lines, that is, for this case:
6420 verify = header_sender/callout=defer_ok
6422 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6423 those file descriptors could be used for SMTP connections. If anything
6424 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6425 could be sent to the SMTP client, causing chaos. The daemon now opens
6426 stdin, stdout, and stderr to /dev/null when it puts itself into the
6429 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6430 log by default. The user can override this with suitable Perl magic.
6432 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6433 the log message when discard triggers, was not working for the DATA ACL or
6434 for the non-SMTP ACL.
6436 78. Error message wording change in sieve.c.
6438 79. If smtp_accept_max_per_host was set, the number of connections could be
6439 restricted to fewer than expected, because the daemon was trying to set up
6440 a new connection before checking whether the processes handling previous
6441 connections had finished. The check for completed processes is now done
6442 earlier. On busy systems, this bug wouldn't be noticed because something
6443 else would have woken the daemon, and it would have reaped the completed
6446 80. If a message was submitted locally by a user whose login name contained one
6447 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6448 It caused a spool format error. I have fixed the spool reading code. A
6449 related problem was that the "from" clause in the Received: line became
6450 illegal because of the space(s). It is now covered by ${quote_local_part.
6452 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6455 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6457 83. Patch from Sieve maintainer to fix unterminated string problem in
6458 "vacation" handling.
6460 84. Some minor changes to the Linux configuration files to help with other
6461 OS variants using glibc.
6463 85. One more patch for Sieve to update vacation handling to latest spec.
6466 ----------------------------------------------------
6467 See the note above about the 4.44 and 4.50 releases.
6468 ----------------------------------------------------
6474 1. Change 4.43/35 introduced a bug that caused file counts to be
6475 incorrectly computed when quota_filecount was set in an appendfile
6478 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6479 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6482 3. Give more explanation in the error message when the command for a transport
6483 filter fails to execute.
6485 4. There are several places where Exim runs a non-Exim command in a
6486 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6487 was being done only for the command run by the queryprogram router. It is
6488 now done for all such subprocesses. The other cases are: ${run, transport
6489 filters, and the commands run by the lmtp and pipe transports.
6491 5. Some older OS have a limit of 256 on the maximum number of file
6492 descriptors. Exim was using setrlimit() to set 1000 as a large value
6493 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6494 systems. I've change it so that if it can't get 1000, it tries for 256.
6496 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6497 was an oversight, and furthermore, ever since the addition of extra
6498 controls (e.g. 4.43/32), the checks on when to allow different forms of
6499 "control" were broken. There should now be diagnostics for all cases when a
6500 control that does not make sense is encountered.
6502 7. $recipients is now available in the predata ACL (oversight).
6504 8. Tidy the search cache before the fork to do a delivery from a message
6505 received from the command line. Otherwise the child will trigger a lookup
6506 failure and thereby defer the delivery if it tries to use (for example) a
6507 cached ldap connection that the parent has called unbind on.
6509 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6510 of $address_data from the recipient verification was clobbered by the
6511 sender verification.
6513 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6514 was its contents. (It was OK if the option was not defined at all.)
6516 11. A "Completed" log line is now written for messages that are removed from
6517 the spool by the -Mrm option.
6519 12. $host_address is now set to the target address during the checking of
6520 ignore_target_hosts.
6522 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6523 being passed; this would have caused $sender_host_name to have been used if
6524 matching the list had actually called for a host name (not very likely,
6525 since this list is usually IP addresses). A host name is now passed as
6528 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6529 code that specifies a non-restarting handler (typically sigaction() in
6530 modern systems) in an attempt to fix a rare and obscure crash bug.
6532 15. Narrowed the window for a race in the daemon that could cause it to ignore
6533 SIGCHLD signals. This is not a major problem, because they are used only to
6534 wake it up if nothing else does.
6536 16. A malformed maildirsize file could cause Exim to calculate negative values
6537 for the mailbox size or file count. Odd effects could occur as a result.
6538 The maildirsize information is now recalculated if the size or filecount
6541 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6542 support for a long time. Removed HAVE_SYS_VFS_H.
6544 18. Updated exipick to current release from John Jetmore.
6546 19. Allow an empty sender to be matched against a lookup in an address list.
6547 Previously the only cases considered were a regular expression, or an
6550 20. Exim went into a mad DNS lookup loop when doing a callout where the
6551 host was specified on the transport, if the DNS lookup yielded more than
6554 21. The RFC2047 encoding function was originally intended for short strings
6555 such as real names; it was not keeping to the 75-character limit for
6556 encoded words that the RFC imposes. It now respects the limit, and
6557 generates multiple encoded words if necessary. To be on the safe side, I
6558 have increased the buffer size for the ${rfc2047: expansion operator from
6561 22. Failure to deliver a bounce message always caused it to be frozen, even if
6562 there was an errors_to setting on the router. The errors_to setting is now
6565 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6566 canonical form (fully expanded) before being placed in
6567 $sender_host_address.
6569 24. Updated eximstats to version 1.33
6571 25. Include certificate and key file names in error message when GnuTLS fails
6572 to set them up, because the GnuTLS error message doesn't include the name
6573 of the failing file when there is a problem reading it.
6575 26. Expand error message when OpenSSL has problems setting up cert/key files.
6578 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6579 (this can affect the format of dates).
6581 28. exim_tidydb, when checking for the continued existence of a message for
6582 which it has found a message-specific retry record, was not finding
6583 messages that were in split spool directories. Consequently, it was
6584 deleting retry records that should have stayed in existence.
6586 29. eximstats updated to version 1.35
6587 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6588 1.35 - bugfix such that pie charts by volume are generated correctly
6590 30. The SPA authentication driver was not abandoning authentication and moving
6591 on to the next authenticator when an expansion was forced to fail,
6592 contradicting the general specification for all authenticators. Instead it
6593 was generating a temporary error. It now behaves as specified.
6595 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6596 (the order specifies the preference for clients). The order is now AES256,
6597 AES128, 3DES, ARCFOUR128.
6599 31. Small patch to Sieve code - explicitly set From: when generating an
6602 32. Exim crashed if a remote delivery caused a very long error message to be
6603 recorded - for instance if somebody sent an entire SpamAssassin report back
6604 as a large number of 550 error lines. This bug was coincidentally fixed by
6605 increasing the size of one of Exim's internal buffers (big_buffer) that
6606 happened as part of the Exiscan merge. However, to be on the safe side, I
6607 have made the code more robust (and fixed the comments that describe what
6610 33. Some experimental protocols are using DNS PTR records for new purposes. The
6611 keys for these records are domain names, not reversed IP addresses. The
6612 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6613 leaves it alone. Component reversal etc. now happens only for IP addresses.
6616 34. The host_aton() function is supposed to be passed a string that is known
6617 to be a valid IP address. However, in the case of IPv6 addresses, it was
6618 not checking this. This is a hostage to fortune. Exim now panics and dies
6619 if the condition is not met. A case was found where this could be provoked
6620 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6621 components; fortuitously, this particular loophole had already been fixed
6622 by change 4.50/55 or 4.44/33 above.
6624 If there are any other similar loopholes, the new check in host_aton()
6625 itself should stop them being exploited. The report I received stated that
6626 data on the command line could provoke the exploit when Exim was running as
6627 exim, but did not say which command line option was involved. All I could
6628 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6629 running as the user.
6632 35. There was a buffer overflow vulnerability in the SPA authentication code
6633 (which came originally from the Samba project). I have added a test to the
6634 spa_base64_to_bits() function which I hope fixes it.
6637 36. The daemon start-up calls getloadavg() while still root for those OS that
6638 need the first call to be done as root, but it missed one case: when
6639 deliver_queue_load_max is set with deliver_drop_privilege. This is
6640 necessary for the benefit of the queue runner, because there is no re-exec
6641 when deliver_drop_privilege is set.
6643 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6644 was in use, was not putting the data itself into the right store pool;
6645 consequently, it could be overwritten for a subsequent message in the same
6646 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6649 38. Sometimes the final signoff response after QUIT could fail to get
6650 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6651 < 0 before doing a fflush(). This bug looks as though it goes back to the
6652 introduction of TLS in release 3.20, but "sometimes" must have been rare
6653 because the tests only now provoked it.
6659 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6660 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6661 Now it returns an integer. A number of calls were still expecting a T/F
6662 return. Fortuitously, in all cases, the tests worked in OK situations,
6663 which is the norm. However, things would have gone wrong on any write
6664 failures on the smtp file descriptor. This function is used when sending
6665 messages over SMTP and also when doing verify callouts.
6667 2. When Exim is called to do synchronous delivery of a locally submitted
6668 message (the -odf or -odi options), it no longer closes stderr before doing
6671 3. Implemented the mua_wrapper option.
6673 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6675 5. Implemented the functions header_remove(), header_testname(),
6676 header_add_at_position(), and receive_remove_recipient(), and exported them
6679 6. If an ACL "warn" statement specified the addition of headers, Exim already
6680 inserted X-ACL-Warn: at the start if there was no header name. However, it
6681 was not making this test for the second and subsequent header lines if
6682 there were newlines in the string. This meant that an invalid header could
6683 be inserted if Exim was badly configured.
6685 7. Allow an ACL "warn" statement to add header lines at the start or after all
6686 the Received: headers, as well as at the end.
6688 8. Added the rcpt_4xx retry error code.
6690 9. Added postmaster_mailfrom=xxx to callout verification option.
6692 10. Added mailfrom=xxxx to the callout verification option, for verify=
6695 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6696 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6698 12. Inserted some casts to stop certain compilers warning when using pointer
6699 differences as field lengths or precisions in printf-type calls (mostly
6700 affecting debugging statements).
6702 13. Added optional readline() support for -be (dynamically loaded).
6704 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6705 same clock tick as a message's arrival, so that its received time was the
6706 same as the "first fail" time on the retry record, and that message
6707 remained on the queue past the ultimate address timeout, every queue runner
6708 would try a delivery (because it was past the ultimate address timeout) but
6709 after another failure, the ultimate address timeout, which should have then
6710 bounced the address, did not kick in. This was a "< instead of <=" error;
6711 in most cases the first failure would have been in the next clock tick
6712 after the received time, and all would be well.
6714 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6715 being recognized when the domain list was tested by the match_domain
6716 condition in an expansion string.
6718 16. Added the ${str2b64: operator.
6720 17. Exim was always calling setrlimit() to set a large limit for the number of
6721 processes, without checking whether the existing limit was already
6722 adequate. (It did check for the limit on file descriptors.) Furthermore,
6723 errors from getrlimit() and setrlimit() were being ignored. Now they are
6724 logged to the main and panic logs, but Exim does carry on, to try to do its
6725 job under whatever limits there are.
6727 18. Imported PCRE 5.0.
6729 19. Trivial typo in log message " temporarily refused connection" (the leading
6732 20. If the log selector return_path_on_delivery was set and an address was
6733 redirected to /dev/null, the delivery process crashed because it assumed
6734 that a return path would always be set for a "successful" delivery. In this
6735 case, the whole delivery is bypassed as an optimization, and therefore no
6738 21. Internal re-arrangement: the function for sending a challenge and reading
6739 a response while authentication was assuming a zero-terminated challenge
6740 string. It's now changed to take a pointer and a length, to allow for
6741 binary data in such strings.
6743 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6745 23. Exim was not respecting finduser_retries when seeking the login of the
6746 uid under which it was called; it was always trying 10 times. (The default
6747 setting of finduser_retries is zero.) Also, it was sleeping after the final
6748 failure, which is pointless.
6750 24. Implemented tls_on_connect_ports.
6752 25. Implemented acl_smtp_predata.
6754 26. If the domain in control=submission is set empty, Exim assumes that the
6755 authenticated id is a complete email address when it generates From: or
6756 Sender: header lines.
6758 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6759 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6760 chown and chgrp in /bin and hostname in /usr/bin.
6762 28. Exim was keeping the "process log" file open after each use, just as it
6763 does for the main log. This opens the possibility of it remaining open for
6764 long periods when the USR1 signal hits a daemon. Occasional processlog
6765 errors were reported, that could have been caused by this. Anyway, it seems
6766 much more sensible not to leave this file open at all, so that is what now
6769 29. The long-running daemon process does not normally write to the log once it
6770 has entered its main loop, and it closes the log before doing so. This is
6771 so that log files can straightforwardly be renamed and moved. However,
6772 there are a couple of unusual error situations where the daemon does write
6773 log entries, and I had neglected to close the log afterwards.
6775 30. The text of an SMTP error response that was received during a remote
6776 delivery was being truncated at 512 bytes. This is too short for some of
6777 the long messages that one sometimes sees. I've increased the limit to
6780 31. It is now possible to make retry rules that apply only when a message has a
6781 specific sender, in particular, an empty sender.
6783 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6784 it possible to be selective about when SMTP synchronization is enforced.
6786 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6788 32. Implemented hosts_connection_nolog.
6790 33. Added an ACL for QUIT.
6792 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6795 35. Added mailbox_size and mailbox_filecount to appendfile.
6797 36. Added control = no_multiline_responses to ACLs.
6799 37. There was a bug in the logic of the code that waits for the clock to tick
6800 in the case where the clock went backwards by a substantial amount such
6801 that the microsecond fraction of "now" was more than the microsecond
6802 fraction of "then" (but the whole seconds number was less).
6804 38. Added support for the libradius Radius client library this is found on
6805 FreeBSD (previously only the radiusclient library was supported).
6811 1. When certain lookups returned multiple values in the form name=value, the
6812 quoting of the values was not always being done properly. Specifically:
6813 (a) If the value started with a double quote, but contained no whitespace,
6815 (b) If the value contained whitespace other than a space character (i.e.
6816 tabs or newlines or carriage returns) it was not quoted.
6817 This fix has been applied to the mysql and pgsql lookups by writing a
6818 separate quoting function and calling it from the lookup code. The fix
6819 should probably also be applied to nisplus, ibase and oracle lookups, but
6820 since I cannot test any of those, I have not disturbed their existing code.
6822 2. A hit in the callout cache for a specific address caused a log line with no
6823 reason for rejecting RCPT. Now it says "Previous (cached) callout
6824 verification failure".
6826 3. There was an off-by-one bug in the queryprogram router. An over-long
6827 return line was truncated at 256 instead of 255 characters, thereby
6828 overflowing its buffer with the terminating zero. As well as fixing this, I
6829 have increased the buffer size to 1024 (and made a note to document this).
6831 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6832 when Exim is waiting for an SMTP response from a remote server, Exim
6833 restarts its select() call on the socket, thereby resetting its timeout.
6834 This is not a problem when such interrupts are rare. Somebody set up a cron
6835 job to run exiwhat every 2 minutes, which is less than the normal select()
6836 timeout (5 or 10 minutes). This meant that the select() timeout never
6837 kicked in because it was always reset. I have fixed this by comparing the
6838 time when an interrupt arrives with the time at the start of the first call
6839 to select(). If more time than the timeout has elapsed, the interrupt is
6840 treated as a timeout.
6842 5. Some internal re-factoring in preparation for the addition of Sieve
6843 extensions (by MH). In particular, the "personal" test is moved to a
6844 separate function, and given an option for scanning Cc: and Bcc: (which is
6845 not set for Exim filters).
6847 6. When Exim created an email address using the login of the caller as the
6848 local part (e.g. when creating a From: or Sender: header line), it was not
6849 quoting the local part when it contained special characters such as @.
6851 7. Installed new OpenBSD configuration files.
6853 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6854 try to make them clearer.
6856 9. Callout options, other than the timeout value, were being ignored when
6857 verifying sender addresses in header lines. For example, when using
6859 verify = header_sender/callout=no_cache
6861 the cache was (incorrectly) being used.
6863 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6864 only the Cygwin environment.
6866 11. When return_path_on_delivery was set as a log selector, if different remote
6867 addresses in the same message used different return paths and parallel
6868 remote delivery occurred, the wrong values would sometimes be logged.
6869 (Whenever a remote delivery process finished, the return path value from
6870 the most recently started remote delivery process was logged.)
6872 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6873 lines when AUTH and/or TLS are in use. This is the "received protocol"
6874 field. Exim used to use "asmtp" for authenticated SMTP, without any
6875 indication (in the protocol name) for TLS use. Now it follows the RFC and
6876 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6877 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6878 names appear in log lines as well as in Received: header lines.
6880 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6881 extensions, and comparison tests, and to fix some bugs.
6883 14. Changes to the "personal" filter test:
6885 (1) The test was buggy in that it was just doing the equivalent of
6886 "contains" tests on header lines. For example, if a user's address was
6887 anne@some.where, the "personal" test would incorrectly be true for
6889 To: susanne@some.where
6891 This test is now done by extracting each address from the header in turn,
6892 and checking the entire address. Other tests that are part of "personal"
6893 are now done using regular expressions (for example, to check local parts
6894 of addresses in From: header lines).
6896 (2) The list of non-personal local parts in From: addresses has been
6897 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6898 taken from the Sieve specification recommendations.
6900 (3) If the message contains any header line starting with "List-" it is
6901 treated as non-personal.
6903 (4) The test for "circular" in the Subject: header line has been removed
6904 because it now seems ill-conceived.
6906 15. Minor typos in src/EDITME comments corrected.
6908 16. Installed latest exipick from John Jetmore.
6910 17. If headers_add on a router specified a text string that was too long for
6911 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6912 of string_sprintf() is now avoided.
6914 18. $message_body_size was not set (it was always zero) when running the DATA
6915 ACL and the local_scan() function.
6917 19. For the "mail" command in an Exim filter, no default was being set for
6918 the once_repeat time, causing a random time value to be used if "once" was
6919 specified. (If the value happened to be <= 0, no repeat happened.) The
6920 default is now 0s, meaning "never repeat". The "vacation" command was OK
6921 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6922 (I found it when inspecting the code).
6924 20. There is now an overall timeout for performing a callout verification. It
6925 defaults to 4 times the callout timeout, which applies to individual SMTP
6926 commands during the callout. The overall timeout applies when there is more
6927 than one host that can be tried. The timeout is checked before trying the
6928 next host. This prevents very long delays if there are a large number of
6929 hosts and all are timing out (e.g. when the network connections are timing
6930 out). The value of the overall timeout can be changed by specifying an
6931 additional sub-option for "callout", called "maxwait". For example:
6933 verify = sender/callout=5s,maxwait=20s
6935 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6936 to the end before writing, but this should make it even safer).
6938 22. Exim was forgetting that it had advertised PIPELINING for the second and
6939 subsequent messages on an SMTP connection. It was also not resetting its
6940 memory on STARTTLS and an internal HELO.
6942 23. When Exim logs an SMTP synchronization error within a session, it now
6943 records whether PIPELINING has been advertised or not.
6945 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6946 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6947 rather than long int.
6949 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6951 26. Added the never_mail option to autoreply.
6957 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6958 crash if the getsockname() call failed; this can happen if a connection is
6959 closed very soon after it is established. The problem was simply in the
6960 order in which certain operations were done, causing Exim to try to write
6961 to the SMTP stream before it had set up the file descriptor. The bug has
6962 been fixed by making things happen in the correct order.
6968 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6969 before the connection was closed, thus losing the rejection response.
6971 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6972 some early Solaris releases, but causes trouble in current releases where
6973 socklen_t is defined.
6975 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6978 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6981 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6982 that releasing the top of it at the end releases what was used for sub-
6983 expansions (unless the block got too big). However, discard this block if
6984 the first thing is a variable or header, so that we can use its block when
6985 it is dynamic (useful for very large $message_headers, for example).
6987 6. Lookups now cache *every* query, not just the most recent. A new, separate
6988 store pool is used for this. It can be recovered when all lookup caches are
6989 flushed. Lookups now release memory at the end of their result strings.
6990 This has involved some general refactoring of the lookup sources.
6992 7. Some code has been added to the store_xxx() functions to reduce the amount
6993 of flapping under certain conditions.
6995 8. log_incoming_interface used to affect only the <= reception log lines. Now
6996 it causes the local interface and port to be added to several more SMTP log
6997 lines, for example "SMTP connection from", and rejection lines.
6999 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
7001 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
7003 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
7004 could be overwritten at the end of the current message (or the start of a
7005 new message if it was set in a HELO ACL). The value is now preserved for
7006 the duration of the SMTP connection.
7008 12. If a transport had a headers_rewrite setting, and a matching header line
7009 contained an unqualified address, that address was qualified, even if it
7010 did not match any rewriting rules. The underlying bug was that the values
7011 of the flags that permit the existence of unqualified sender and recipient
7012 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
7013 non-local messages, and by -bnq for local messages) were not being
7014 preserved with the message after it was received.
7016 13. When Exim was logging an SMTP synchronization error, it could sometimes log
7017 "next input=" as part of the text comprising the host identity instead of
7018 the correct text. The code was using the same buffer for two different
7019 strings. However, depending on which order the printing function evaluated
7020 its arguments, the bug did not always show up. Under Linux, for example, my
7021 test suite worked just fine.
7023 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
7024 doesn't work with some older versions of Perl. It has been changed to "my",
7025 which in any case is probably the better facility to use.
7027 15. A really picky compiler found some instances of statements for creating
7028 error messages that either had too many or two few arguments for the format
7031 16. The size of the buffer for calls to the DNS resolver has been increased
7032 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7033 for addresses that have a lot of PTR records. This alleviates a problem; it
7034 does not fully solve it.
7036 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7037 buffer now truncates the list and logs the incident, which is the same
7038 action as happens when Exim is looking up a host name and its aliases.
7039 Previously in this situation something unpredictable would happen;
7040 sometimes it was "internal error: store_reset failed".
7042 18. If a server dropped the connection unexpectedly when an Exim client was
7043 using GnuTLS and trying to read a response, the client delivery process
7044 crashed while trying to generate an error log message.
7046 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7047 string, for example:
7049 warn message = H1: something\nH2: something
7051 the text was added as a single header line from Exim's point of view
7052 though it ended up OK in the delivered message. However, searching for the
7053 second and subsequent header lines using $h_h2: did not work. This has been
7054 fixed. Similarly, if a system filter added multiple headers in this way,
7055 the routers could not see them.
7057 20. Expanded the error message when iplsearch is called with an invalid key to
7058 suggest using net-iplsearch in a host list.
7060 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7061 ACLs are no longer actually imposed (and a message to that effect is
7064 22. If a "gecos" field in a passwd entry contained escaped characters, in
7065 particular, if it contained a \" sequence, Exim got it wrong when building
7066 a From: or a Sender: header from that name. A second bug also caused
7067 incorrect handling when an unquoted " was present following a character
7068 that needed quoting.
7070 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7071 was not being matched caselessly.
7073 24. Arranged for all hyphens in the exim.8 source to be escaped with
7076 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7077 properly. Recipient callout cache records were still being keyed to include
7078 the sender, even when use_sender was set false. This led to far more
7079 callouts that were necessary. The sender is no longer included in the key
7080 when use_sender is false.
7082 26. Added "control = submission" modifier to ACLs.
7084 27. Added the ${base62d: operator to decode base 62 numbers.
7086 28. dnsdb lookups can now access SRV records.
7088 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7089 the configuration file.
7091 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7092 (-v) mode. This makes the output for a verbose queue run more intelligible.
7094 31. Added a use_postmaster feature to recipient callouts.
7096 32. Added the $body_zerocount variable, containing the number of binary zero
7097 bytes in the message body.
7099 33. The time of last modification of the "new" subdirectory is now used as the
7100 "mailbox time last read" when there is a quota error for a maildir
7103 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7105 35. Added +ignore_unknown as a special item in host lists.
7107 36. Code for decoding IPv6 addresses in host lists is now included, even if
7108 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7109 address was recognized as an IP address, but was then not correctly decoded
7110 into binary, causing unexpected and incorrect effects when compared with
7117 1. Very minor rewording of debugging text in manualroute to say "list of
7118 hosts" instead of "hostlist".
7120 2. If verify=header_syntax was set, and a header line with an unqualified
7121 address (no domain) and a large number of spaces between the end of the
7122 name and the colon was received, the reception process suffered a buffer
7123 overflow, and (when I tested it) crashed. This was caused by some obsolete
7124 code that should have been removed. The fix is to remove it!
7126 3. When running in the test harness, delay a bit after writing a bounce
7127 message to get a bit more predictability in the log output.
7129 4. Added a call to search_tidyup() just before forking a reception process. In
7130 theory, someone could use a lookup in the expansion of smtp_accept_max_
7131 per_host which, without the tidyup, could leave open a database connection.
7133 5. Added the variables $recipient_data and $sender_data which get set from a
7134 lookup success in an ACL "recipients" or "senders" condition, or a router
7135 "senders" option, similar to $domain_data and $local_part_data.
7137 6. Moved the writing of debug_print from before to after the "senders" test
7140 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7141 problems for message scanning, either using a data ACL, or using
7142 local_scan() because the Received: header was not generated till after they
7143 were called (in order to set the time as the time of reception completion).
7144 I have revised the way this works. The header is now generated after the
7145 body is received, but before the ACL or local_scan() are called. After they
7146 are run, the timestamp in the header is updated.
7152 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7153 before starting a queue runner without re-exec. This happened only when
7154 deliver_drop_privilege was set or when the Exim user was set to root. The
7155 effect of the bug was that timeouts during subsequent deliveries caused
7156 crashes instead of being properly handled. The handler is now left at its
7157 default (and expected) setting.
7159 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7160 message, again when deliver_drop_privilege is set or Exim is run as root.
7161 The bug described in (1) was not present in this case, but the tidying up
7162 of the other signals was missing. I have made the two cases consistent.
7164 3. The ignore_target_hosts setting on a manualroute router was being ignored
7165 for hosts that were looked up using the /MX notation.
7167 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7170 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7171 operated on the sender address. After changing the $sender_address to <>
7172 for the sender address verify, Exim was re-instated it as the original
7173 (before rewriting) address, but remembering that it had rewritten it, so it
7174 wasn't rewriting it again. This bug also had the effect of breaking the
7175 sender address verification caching when the sender address was rewritten.
7177 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7178 This has been changed so that if the ip literal address matches
7179 ignore_target_hosts, the router declines.
7181 7. Added expansion conditions match_domain, match_address, and match_local_
7182 part (NOT match_host).
7184 8. The placeholder for the Received: header didn't have a length field set.
7186 9. Added code to Exim itself and to exim_lock to test for a specific race
7187 condition that could lead to file corruption when using MBX delivery. The
7188 issue is with the lockfile that is created in /tmp. If this file is removed
7189 after a process has opened it but before that process has acquired a lock,
7190 there is the potential for a second process to recreate the file and also
7191 acquire a lock. This could lead to two Exim processes writing to the file
7192 at the same time. The added code performs the same test as UW imapd; it
7193 checks after acquiring the lock that its file descriptor still refers to
7194 the same named file.
7196 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7197 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7200 11. Added the smtp_active_hostname option. If used, this will typically be made
7201 to depend on the incoming interface address. Because $interface_address is
7202 not set up until the daemon has forked a reception process, error responses
7203 that can happen earlier (such as "too many connections") no longer contain
7206 12. If an expansion in a condition on a "warn" statement fails because a lookup
7207 defers, the "warn" statement is abandoned, and the next ACL statement is
7208 processed. Previously this caused the whole ACL to be aborted.
7210 13. Added the iplsearch lookup type.
7212 14. Added ident_timeout as a log selector.
7214 15. Added tls_certificate_verified as a log selector.
7216 16. Added a global option tls_require_ciphers (compare the smtp transport
7217 option of the same name). This controls incoming TLS connections.
7219 17. I finally figured out how to make tls_require_ciphers do a similar thing
7220 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7221 before starting the TLS session.
7223 18. Tabs are now shown as \t in -bP output.
7225 19. If the log selector return_path_on_delivery was set, Exim crashed when
7226 bouncing a message because it had too many Received: header lines.
7228 20. If two routers both had headers_remove settings, and the first one included
7229 a superfluous trailing colon, the final name in the first list and the
7230 first name in the second list were incorrectly joined into one item (with a
7231 colon in the middle).
7237 1. Added -C and -D options to the exinext utility, mainly to make it easier
7238 to include in the automated testing, but these could be helpful when
7239 multiple configurations are in use.
7241 2. The exinext utility was not formatting the output nicely when there was
7242 an alternate port involved in the retry record key, nor when there was a
7243 message id as well (for retries that were specific to a specific message
7244 and a specific host). It was also confused by IPv6 addresses, because of
7245 the additional colons they contain. I have fixed the IPv4 problem, and
7246 patched it up to do a reasonable job for IPv6.
7248 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7249 delivery, the log line now contains "pipelined" if PIPELINING was used.
7251 4. An SMTP transport process used to panic and die if the bind() call to set
7252 an explicit outgoing interface failed. This has been changed; it is now
7253 treated in the same way as a connect() failure.
7255 5. A reference to $sender_host_name in the part of a conditional expansion
7256 that was being skipped was still causing a DNS lookup. This no longer
7259 6. The def: expansion condition was not recognizing references to header lines
7260 that used bh_ and bheader_.
7262 7. Added the _cache feature to named lists.
7264 8. The code for checking quota_filecount in the appendfile transport was
7265 allowing one more file than it should have been.
7267 9. For compatibility with Sendmail, the command line option
7275 and sets the incoming protocol and host name (for trusted callers). The
7276 host name and its colon can be omitted when only the protocol is to be set.
7277 Note the Exim already has two private options, -pd and -ps, that refer to
7278 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7279 "s", but I don't think that's a major issue.
7281 10. A number of refactoring changes to the code, none of which should affect
7284 (a) The number of logging options was getting close to filling up the
7285 32-bit word that was used as a bit map. I have split them into two classes:
7286 those that are passed in the argument to log_write(), and those that are
7287 only ever tested independently outside of that function. These are now in
7288 separate 32-bit words, so there is plenty of room for expansion again.
7289 There is no change in the user interface or the logging behaviour.
7291 (b) When building, for example, log lines, the code previously used a
7292 macro that called string_cat() twice, in order to add two strings. This is
7293 not really sufficiently general. Furthermore, there was one instance where
7294 it was actually wrong because one of the argument was used twice, and in
7295 one call a function was used. (As it happened, calling the function twice
7296 did not affect the overall behaviour.) The macro has been replaced by a
7297 function that can join an arbitrary number of extra strings onto a growing
7300 (c) The code for expansion conditions now uses a table and a binary chop
7301 instead of a serial search (which was left over from when there were very
7302 few conditions). Also, it now recognizes conditions like "pam" even when
7303 the relevant support is not compiled in: a suitably worded error message is
7304 given if an attempt is made to use such a condition.
7306 11. Added ${time_interval:xxxxx}.
7308 12. A bug was causing one of the ddress fields not to be passed back correctly
7309 from remote delivery subprocesses. The field in question was not being
7310 subsequently used, so this caused to problems in practice.
7312 13. Added new log selectors queue_time and deliver_time.
7314 14. Might have fixed a bug in maildirsizefile handling that threw up
7315 "unexpected character" debug warnings, and recalculated the data
7316 unnecessarily. In any case, I expanded the warning message to give more
7319 15. Added the message "Restricted characters in address" to the statements in
7320 the default ACL that block characters like @ and % in local parts.
7322 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7323 Three changes have been made:
7325 (a) There was a serious bug; a negative response to MAIL caused the whole
7326 recipient domain to be cached as invalid, thereby blocking all messages
7327 to all local parts at the same domain, from all senders. This bug has
7328 been fixed. The domain is no longer cached after a negative response to
7329 MAIL if the sender used is not empty.
7331 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7334 (c) A new callout option, "use_sender" has been added for people who want
7335 the modified behaviour.
7341 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7344 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7345 indeed breaks things for older releases.
7347 3. Added additional logging to the case where there is a problem reading data
7348 from a filter that is running in a subprocess using a pipe, in order to
7349 try to track down a specific problem.
7351 4. Testing facility fudge: when running in the test harness and attempting
7352 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7353 getting "No route to host". Convert this to a timeout.
7355 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7358 6. Some OS don't have socklen_t but use size_t instead. This affects the
7359 fifth argument of getsockopt() amongst other things. This is now
7360 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7361 can be set for individual OS. I have set it for SunOS5, OSF1, and
7362 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7363 some earlier ones do not.
7365 7. Change 4.30/15 was not doing the test caselessly.
7367 8. The standard form for an IPv6 address literal was being rejected by address
7368 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7369 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7370 this, as well as the form without the "IPv6" on the front (but only when
7371 address literals are enabled, of course).
7373 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7375 10. Exim crashed if a message with an empty sender address specified by -f
7376 encountered a router with an errors_to setting. This could be provoked only
7377 by a command such as
7381 where an empty string was supplied; "<>" did not hit this bug.
7383 11. Installed PCRE release 4.5.
7385 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7386 remained set. It is now erased.
7388 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7389 times from message ids (which are base 36 rather than the normal 62).
7391 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7392 were being counted as actual protocol errors, and logged if the log
7393 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7394 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7395 and DATA following a set of rejected RCPTs do not count as protocol errors.
7396 In other words, Exim assumes they were pipelined, though this may not
7397 actually be the case. Of course, in all cases the client gets an
7398 appropriate error code.
7400 15. If a lookup fails in an ACL condition, a message about the failure may
7401 be available; it is used if testing the ACL cannot continue, because most
7402 such messages specify what the cause of the deferral is. However, some
7403 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7404 that caused an old message to be retained and used if a later statement
7405 caused a defer, replacing the real cause of the deferral.
7407 16. If an IP address had so many PTR records that the DNS lookup buffer
7408 was not large enough to hold them, Exim could crash while trying to process
7409 the truncated data. It now detects and logs this case.
7411 17. Further to 4.21/58, another change has been made: if (and only if) the
7412 first line of a message (the first header line) ends with CRLF, a bare LF
7413 in a subsequent header line has a space inserted after it, so as not to
7414 terminate the header.
7416 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7417 unnecessarily, used atoi() instead of strtol(), and didn't check the
7418 termination when getting file sizes from file names by regex.
7420 19. Completely re-implemented the support for maildirsize files, in the light
7421 of a number of problems with the previous contributed implementation
7422 (4.30/29). In particular:
7424 . If the quota is zero, the maildirsize file is maintained, but no quota is
7427 . If the maildir directory does not exist, it is created before any attempt
7428 to write a maildirsize file.
7430 . The quota value in the file is just a cache; if the quota is changed in
7431 the transport, the new value overrides.
7433 . A regular expression is available for excluding directories from the
7436 20. The autoreply transport checks the characters in options that define the
7437 message's headers; it allows continued headers, but it was checking with
7438 isspace() after an embedded newline instead of explicitly looking for a
7441 21. If all the "regular" hosts to which an address was routed had passed their
7442 expiry times, and had not reached their retry times, the address was
7443 bounced, even if fallback hosts were defined. Now Exim should go on to try
7446 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7447 equivalent code in the SMTP transport. Some hosts send humungous responses
7448 to HELO/EHLO, more than 1024 it seems.
7450 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7451 gives compiler warnings in some environments. I've now done it "properly",
7454 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7455 (because of problems with the built-in one) was declared to return uschar *
7456 instead of char *, causing compiler failure.
7458 25. Fixed a file descriptor leak when processing alias/forward files.
7460 26. Fixed a minor format string issue in dbfn.c.
7462 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7464 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7465 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7468 29. When a sender address is verified, it is cached, to save repeating the test
7469 when there is more than one recipient in a message. However, when the
7470 verification involves a callout, it is possible for different callout
7471 options to be set for different recipients. It is too complicated to keep
7472 track of this in the cache, so now Exim always runs a verification when a
7473 callout is required, relying on the callout cache for the optimization.
7474 The overhead is duplication of the address routing, but this should not be
7477 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7478 to be verified with callout=postmaster, and the main callout worked but the
7479 postmaster check failed, the verification correctly failed. However, if a
7480 subsequent RCPT command asked for sender verification *without* the
7481 postmaster check, incorrect caching caused this verification also to fail,
7484 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7485 it was not caching the DNS options (qualify_single, search_parents) that
7486 were used when the lookup failed. A subsequent lookup with different
7487 options therefore always gave the same answer, though there were cases
7488 where it should not have. (Example: a "domains = !$mx_any" option on a
7489 dnslookup router: the "domains" option is always processed without any
7490 widening, but the router might have qualify_single set.) Now Exim uses the
7491 cached value only when the same options are set.
7493 32. Added John Jetmore's "exipick" utility to the distribution.
7495 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7496 than a timeout (e.g. a certificate is required, and is not provided), an
7497 Exim server now closes the connection immediately. Previously it waited for
7498 the client to close - but if the client is SSL, it seems that they each
7499 wait for each other, leading to a delay before one of them times out.
7501 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7502 maintained 0.8.x compatibility because I don't think many are using it, and
7503 it is clearly obsolete.
7505 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7508 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7509 client certificate was expired. A simple patch fixes this, though I don't
7510 understand the full logic of why the verify callback is called multiple
7513 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7514 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7515 which causes problems with some clients (such as the Certicom SSL Plus
7516 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7517 disables the coutermeasure allowing Eudora to connect."
7519 38. Exim was not checking that a write() to a log file succeeded. This could
7520 lead to Bad Things if a log got too big, in particular if it hit a file
7521 size limit. Exim now panics and dies if it cannot write to a log file, just
7522 as it does if it cannot open a log file.
7524 39. Modified OS/Makefile-Linux so that it now contains
7526 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7528 The two -D definitions ensure that Exim is compiled with large file
7529 support, which makes it possible to handle log files that are bigger than
7532 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7533 instance) a domain was checked against a named list that involved a lookup,
7534 causing $domain_data to be set, then another domain was checked against the
7535 same list, then the first domain was re-checked, the value of $domain_data
7536 after the final check could be wrong. In particular, if the second check
7537 failed, it could be set empty. This bug probably also applied to
7540 41. The strip_trailing_dot option was not being applied to the address given
7541 with the -f command-line option.
7543 42. The code for reading a message's header from the spool was incrementing
7544 $received_count, but never initializing it. This meant that the value was
7545 incorrect (doubled) while delivering a message in the same process in which
7546 it was received. In the most common configuration of Exim, this never
7547 happens - a fresh exec is done - but it can happen when
7548 deliver_drop_privilege is set.
7550 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7551 it now includes up to 150 characters of the unexpected data in the log
7554 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7555 and building data strings. The size of both of these buffers was 10 000
7556 bytes - far larger than anybody would *ever* want, thought I. Needless to
7557 say, somebody hit the limit. I have increased the maximum line length to
7558 20 000 and the maximum data length of concatenated lines to 100 000. I have
7559 also fixed two bugs, because there was no checking on these buffers. Tsk,
7560 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7561 buffer is too small.
7563 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7564 lsearch lookups. Now it does.
7566 46. When parsing a route_list item in a manualroute router, a fixed-length
7567 buffer was used for the list of hosts. I made this 1024 bytes long,
7568 thinking that nobody would ever have a list of hosts that long. Wrong.
7569 Somebody had a whole pile of complicated expansion conditions, and the
7570 string was silently truncated, leading to an expansion error. It turns out
7571 that it is easier to change to an unlimited length (owing to other changes
7572 that have happened since this code was originally written) than to build
7573 structure for giving a limitation error. The length of the item that
7574 expands into the list of hosts is now unlimited.
7576 47. The lsearch lookup could not handle data where the length of text line was
7577 more than 4095 characters. Such lines were truncated, leading to shortened
7578 data being returned. It should now handle lines of any length.
7580 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7581 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7584 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7585 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7586 no longer happens in comment lines. A list of replacements is now placed
7587 at the head of all of the source files, except those whose only change is
7588 to replace PERL_COMMAND in the very first #! line.
7590 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7591 messages on the queue, with a bottom-up merge sort, using code contributed
7592 by Michael Haardt. This should make operations like -bp somewhat faster on
7593 large queues. It won't affect queue runners, except when queue_run_in_order
7596 51. Installed eximstats 1.31 in the distribution.
7598 52. Added support for SRV lookups to the dnslookup router.
7600 53. If an ACL referred to $message_body or $message_body_end, the value was not
7601 reset for any messages that followed in the same SMTP session.
7603 54. The store-handling optimization for building very long strings was not
7604 differentiating between the different store pools. I don't think this
7605 actually made any difference in practice, but I've tidied it.
7607 55. While running the routers to verify a sender address, $sender_address
7608 was still set to the sender address. This is wrong, because when routing to
7609 send a bounce to the sender, it would be empty. Therefore, I have changed
7610 it so that, while verifying a sender address, $sender_address is set to <>.
7611 (There is no change to what happens when verifying a recipient address.)
7613 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7614 target A or AAAA records (if not already returned) without resetting the
7615 qualify_single or search_parents options of the DNS resolver. These are
7616 inappropriate in this case because the targets of MX and SRV records must
7617 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7618 target that, when qualified, matched something in the local domain. These
7619 two options are now turned off when doing these lookups.
7621 57. It seems that at least some releases of Reiserfs (which does not have the
7622 concept of a fixed number of inodes) returns zero and not -1 for the
7623 number of available inodes. This interacted badly with check_spool_inodes,
7624 which assumed that -1 was the "no such thing" setting. What I have done is
7625 to check that the total number of inodes is greater than zero before doing
7626 the test of how many are available.
7628 58. When a "warn" ACL statement has a log_message modifier, the message is
7629 remembered, and not repeated. This is to avoid a lot of repetition when a
7630 message has many recipients that cause the same warning to be written.
7631 However, Exim was preserving the list of already written lines for an
7632 entire SMTP session, which doesn't seem right. The memory is now reset if a
7633 new message is started.
7635 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7636 debugging output unless log_rewrite was also set.
7638 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7639 of (int)(handle) when we know that handle contains (void *)(-1).
7641 61. The Exim daemon panic-logs an error return when it closes the incoming
7642 connection. However "connection reset by peer" seems to be common, and
7643 isn't really an error worthy of noting specially, so that particular error
7646 62. When Exim is trying to find all the local interfaces, it used to panic and
7647 die if the ioctl to get the interface flags failed. However, it seems that
7648 on at least one OS (Solaris 9) it is possible to have an interface that is
7649 included in the list of interfaces, but for which you get a failure error
7650 for this call. This happens when the interface is not "plumbed" into a
7651 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7652 failure of the "get flags" call assumes that the interface is down.
7654 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7655 makes life easier for people who are doing arithmetic on fields extracted
7656 from dates, where you often get leading zeros that should not be
7657 interpreted as octal.
7659 64. Added qualify_domain to the redirect router, to override the global
7662 65. If a pathologically long header line contained very many addresses (the
7663 report of this problem mentioned 10 000) and each of them was rewritten,
7664 Exim could use up a very large amount of memory. (It kept on making new
7665 copies of the header line as it rewrote, and never released the old ones.)
7666 At the expense of a bit more processing, the header rewriting function has
7667 been changed so that it no longer eats memory in this way.
7669 66. The generation of the Received: header has been moved from the time that a
7670 message starts to be received, to the time that it finishes. The timestamp
7671 in the Received: header should now be very close to that of the <= log
7672 line. There are two side-effects of this change:
7674 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7675 logged header lines no longer include the local Received: line, because
7676 it has not yet been created. The same applies to a copy of the message
7677 that is returned to a non-SMTP sender when a message is rejected.
7679 (b) When a filter file is tested using -bf, no additional Received: header
7680 is added to the test message. After some thought, I decided that this
7683 This change does not affect the value of $received_for. It is still set
7684 after address rewriting, but before local_scan() is called.
7686 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7688 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7689 gave an unhelpful panic error message, and a defer error. I have managed to
7690 change this behaviour so that it now rejects any supplied certificate,
7691 which seems right, as the list of acceptable certificates is empty.
7693 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7694 gave an unhelpful defer error. I have not managed to make this reject any
7695 supplied certificates, but the error message it gives is "no certificate
7696 supplied", which is not helpful.
7698 70. exigrep's output now also includes lines that are not associated with any
7699 message, but which match the given pattern. Implemented by a patch from
7700 Martin Sluka, which also tidied up the Perl a bit.
7702 71. Recipient callout verification, like sender verification, was using <> in
7703 the MAIL FROM command. This isn't really the right thing, since the actual
7704 sender may affect whether the remote host accepts the recipient or not. I
7705 have changed it to use the actual sender in the callout; this means that
7706 the cache record is now keyed on a recipient/sender pair, not just the
7707 recipient address. There doesn't seem to be a real danger of callout loops,
7708 since a callout by the remote host to check the sender would use <>.
7709 [SEE ABOVE: changed after hitting problems.]
7711 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7712 temporary errors. However, in the case of such a code being given after
7713 the end of a data transmission (i.e. after ".") Exim was failing to write
7714 a retry record for the message. (Yes, there was some broken host that was
7715 actually sending 8xx at this point.)
7717 73. An unknown lookup type in a host list could cause Exim to panic-die when
7718 the list was checked. (An example that provoked this was putting <; in the
7719 middle of a list instead of at the start.) If this happened during a DATA
7720 ACL check, a -D file could be left lying around. This kind of configuration
7721 error no longer causes Exim to die; instead it causes a defer error. The
7722 incident is still logged to the main and panic logs.
7724 74. Buglet left over from Exim 3 conversion. The message "too many messages
7725 in one connection" was written to the rejectlog but not the mainlog, except
7726 when address rewriting (yes!) was being logged.
7728 75. Added write_rejectlog option.
7730 76. When a system filter was run not as root (that is, when system_filter_user
7731 was set), the values of the $n variables were not being returned to the
7732 main process; thus, they were not subsequently available in the $sn
7735 77. Added +return_path_on_delivery log selector.
7737 78. A connection timeout was being treated differently from recipients deferred
7738 when testing hosts_max_try with a message that was older than the host's
7739 retry timeout. (The host should not be counted, thus allowing all hosts to
7740 be tried at least once before bouncing.) This may have been the cause of an
7741 occasionally reported bug whereby a message would remain on the queue
7742 longer than the retry timeout, but would be bounced if a delivery was
7743 forced. I say "may" because I never totally pinned down the problem;
7744 setting up timeout/retry tests is difficult. See also the next item.
7746 79. The ultimate address timeout was not being applied to errors that involved
7747 a combination of host plus message (for example, a timeout on a MAIL
7748 command). When an address resolved to a number of possible hosts, and they
7749 were not all tried for each delivery (e.g. because of hosts_max_try), a
7750 message could remain on the queue longer than the retry timeout.
7752 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7755 81. Fixed an obscure SMTP outgoing bug which required at least the following
7756 conditions: (a) there was another message waiting for the same server;
7757 (b) the server returned 5xx to all RCPT commands in the first message so
7758 that the message was not completed; (c) the server dropped the connection
7759 or gave a negative response to the RSET that Exim sends to abort the
7760 transaction. The observed case was a dropped connection after DATA that had
7761 been sent in pipelining mode. That is, the server had advertised PIPELINING
7762 but was not implementing it correctly. The effect of the bug was incorrect
7763 behaviour, such as trying another host, and this could lead to a crash.
7769 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7770 and daemon.c were passed as pointers to ints; they should have been
7771 pointers to socklen_t variables (which are typically unsigned ints).
7773 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7776 3. Fixed a really odd bug that affected only the testing scheme; patching a
7777 certain fixed string in the binary changed the value of another string that
7778 happened to be identical to the end of the original first string.
7780 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7781 name", it returns that address as the IP address. On some operating
7782 systems (e.g. Solaris), it also passes back the IP address string as the
7783 "host name". However, on others (e.g. Linux), it passes back an empty
7784 string. Exim wasn't checking for this, and was changing the host name to an
7785 empty string, assuming it had been canonicalized.
7787 5. Although rare, it is permitted to have more than one PTR record for a given
7788 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7789 all the names associated with an address, because they do in Solaris.
7790 However, it seems that they do not in Linux for data that comes from the
7791 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7792 I found this out when I moved to a new Linux workstation and tried to run
7793 the Exim test suite.
7795 To get round this problem I have changed the code so that it now does its
7796 own call to the DNS to look up PTR records when searching for a host name.
7797 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7798 addresses that are only in /etc/hosts are still found.
7800 This behaviour is, however, controlled by an option called host_lookup_
7801 order, which defaults to "bydns:byaddr". If people want to use the other
7802 order, or indeed, just use one or the other means of lookup, they can
7803 specify it in this variable.
7805 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7806 some operating systems, this comes back from gethostbyaddr() as an empty
7807 string, and this is what Exim used to test for. However, it seems that in
7808 other systems, "." is yielded. Exim now tests for this case too.
7810 7. The values of check_spool_space and check_log_space are now held internally
7811 as a number of kilobytes instead of an absolute number of bytes. If a
7812 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7813 kilobyte. This means that much larger values can be stored.
7815 8. Exim monitor: an attempt to get the action menu when not actually pointing
7816 at a message produces an empty menu entitled "No message selected". This
7817 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7818 no entries in it ("Shell widget menu has zero width and/or height"). So I
7819 have added a single, blank menu entry in this case.
7821 9. Added ${quote_local_part.
7823 10. MIME decoding is now applied to the contents of Subject: header lines when
7826 11. Now that a reference to $sender_host_address automatically causes a reverse
7827 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7828 host lookup before query-style lookups in lists that might use this
7829 variable. This has therefore been abolished, and the "net-" prefix is no
7830 longer necessary for query-style lookups.
7832 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7833 have been a typo for LFLAGS, so it has been changed.
7835 13. The install script calls Exim with "-C /dev/null" in order to find the
7836 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7837 to be output. However, since Exim outputs its version number before the
7838 error, it didn't break the script. It just looked ugly. I fixed this by
7839 always allowing "-C /dev/null" if the caller is root.
7841 14. Ignore overlarge ACL variable number when reading spool file - insurance
7842 against a later release with more variables having written the file.
7844 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7845 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7846 this, as well as the form without the "IPv6" on the front.
7848 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7849 OS/Makefile-Darwin file.
7851 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7852 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7854 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7855 variable. However, some OS use ints for inodes. I've added cast to long int
7856 to get rid of the compiler warning.
7858 19. I had forgotten to lock out "/../" in configuration file names when
7859 ALT_CONFIG_PREFIX was set.
7861 20. Routers used for verification do not need to specify transports. However,
7862 if such a router generated a host list, and callout was configured, Exim
7863 crashed, because it could not find a port number from the (non-existent)
7864 transport. It now assumes port 25 in this circumstance.
7866 21. Added the -t option to exigrep.
7868 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7869 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7870 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7871 them is set, LOOKUP_LSEARCH is forced.
7873 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7875 24. Added sender and host information to the "rejected by local_scan()" log
7876 line; previously there was no indication of these.
7878 25. Added .include_if_exists.
7880 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7881 Linux. It turns out that not all file systems support this. Apparently some
7882 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7883 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7884 not supported on the file descriptor, is now ignored when Exim is trying to
7885 sync a directory. This applies only to Linux.
7887 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7889 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7890 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7893 29. Added support for maildirsize files from supplied patch (modified a bit).
7895 30. The use of :fail: followed by an empty string could lead Exim to respond to
7896 sender verification failures with (e.g.):
7898 550 Verification failed for <xxx>
7899 550 Sender verify failed
7901 where the first response line was missing the '-' that indicates it is not
7902 the final line of the response.
7904 31. The loop for finding the name of the user that called Exim had a hardwired
7905 limit of 10; it now uses the value of finduser_retries, which is used for
7906 all other user lookups.
7908 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7911 33. Exim was neglecting to zero errno before one call of strtol() when
7912 expanding a string and expecting an integer value. On some systems this
7913 resulted in spurious "integer overflow" errors. Also, it was casting the
7914 result into an int without checking.
7916 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7917 did not work. The code looks as if it has *never* worked, though it appears
7918 to have been documented since at least release 1.62. I have made it work.
7920 35. The "timeout_DNS" error in retry rules, also documented since at least
7921 1.62, also never worked. As it isn't clear exactly what this means, and
7922 clearly it isn't a major issue, I have abolished the feature by treating it
7923 as "timeout", and writing a warning to the main and panic logs.
7925 36. The display of retry rules for -brt wasn't always showing the error code
7928 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7929 timeout_connect_A, timeout_connect_MX.
7931 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7932 to the empty sender.
7934 39. The daemon was not analysing the content of -oX till after it had closed
7935 stderr and disconnected from the controlling terminal. This meant that any
7936 syntax errors were only noted on the panic log, and the return code from
7937 the command was 0. By re-arranging the code a little, I've made the
7938 decoding happen first, so such errors now appear on stderr, and the return
7939 code is 1. However, the actual setting up of the sockets still happens in
7940 the disconnected process, so errors there are still only recorded on the
7943 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7944 connections (as happens on some IP stacks) was logged at start up time as
7945 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7946 it from "IPv6 and IPv4", which means that two separate sockets are being
7949 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7950 says whether AF_INET or AF_INET6 was passed as an argument.
7952 42. Exiwhat output was messed up when time zones were included in log
7955 43. Exiwhat now gives more information about the daemon's listening ports,
7956 and whether -tls-on-connect was used.
7958 44. The "port" option of the smtp transport is now expanded.
7960 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7961 silently ignored. Now an error message is written to the main and panic
7964 46. There's a new ACL modifier called "logwrite" which writes to a log file
7965 as soon as it is encountered.
7967 47. Added $local_user_uid and $local_user_gid at routing time.
7969 48. Exim crashed when trying to verify a sender address that was being
7972 49. Exim was recognizing only a space character after ".include". It now also
7973 recognizes a tab character.
7975 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7976 extracting the relevant information from the specification. The man page no
7977 longer contains scrambled data for the -d option, and I've added a section
7978 at the front about calling Exim under different names.
7980 51. Added "extra_headers" argument to the "mail" command in filter files.
7982 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7985 53. Installed eximstats 1.29.
7987 54. Added transport_filter_timeout as a generic transport option.
7989 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7990 Cc: header lines. This was required by RFC 822, but it not required by RFC
7993 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7994 incoming messages that did not have them. Now it does so only if the
7995 message originates locally, that is, if there is no associated remote host
7996 address. When Resent- header lines are present, this applies to the Resent-
7997 lines rather than the non-Resent- lines.
7999 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
8000 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
8002 58. Messages for configuration errors now include the name of the main
8003 configuration file - useful now that there may be more than one file in a
8004 list (.included file names were always shown).
8006 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
8007 for those rare installations that do not start the daemon as root or run it
8008 setuid root. I've cut out the call to initgroups() if the daemon is not
8011 60. The Exim user and group can now be bound into the binary as text strings
8012 that are looked up at the start of Exim's processing.
8014 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
8016 62. Added $mailstore_basename variable.
8018 63. Installed patch to sieve.c from Michael Haardt.
8020 64. When Exim failed to open the panic log after failing to open the main log,
8021 the original message it was trying to log was written to stderr and debug
8022 output, but if they were not available (the usual case in production), it
8023 was lost. Now it is written to syslog before the two lines that record the
8024 failures to open the logs.
8026 65. Users' Exim filters run in subprocesses under the user's uid. It is
8027 possible for a "deliver" command or an alias in a "personal" command to
8028 provoke an address rewrite. If logging of address rewriting is configured,
8029 this fails because the process is not running as root or exim. There may be
8030 a better way of dealing with this, but for the moment (because 4.30 needs
8031 to be released), I have disabled address rewrite logging when running a
8032 filter in a non-root, non-exim process.
8038 1. The buildconfig auxiliary program wasn't quoting the value set for
8039 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8040 not defined. This bug was masked in 4.22 by the effect that was fixed in
8043 2. Some messages that were rejected after a message id was allocated were
8044 shown as "incomplete" by exigrep. It no longer does this for messages that
8045 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8047 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8048 have allow_domain_literals set, the ID did not get logged in the <= line.
8049 Domain literals are now always recognized in Message-ID: header lines.
8051 4. The first argument for a ${extract expansion item is the key name or field
8052 number. Leading and trailing spaces in this item were not being ignored,
8053 causing some misleading effects.
8055 5. When deliver_drop_privilege was set, single queue runner processes started
8056 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8057 same command in the process it spins off) were not dropping privilege.
8059 6. When the daemon running as "exim" started a queue runner, it always
8060 re-executed Exim in the spun-off process. This is a waste of effort when
8061 deliver_drop_privilege is set. The new process now just calls the
8062 queue-runner function directly.
8068 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8071 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8072 ignored. Though the use of -oP was forcing the writing of a pid file, it
8073 was always written to the default place.
8075 3. If the message "no IP address found for host xxxx" is generated during
8076 incoming verification, it is now followed by identification of the incoming
8077 connection (so you can more easily find what provoked it).
8079 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8081 5. Added some features to "harden" Exim a bit more against certain attacks:
8083 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8084 be put in Local/Makefile. This is like the never_users runtime option,
8085 but it cannot be overridden. The default setting is "root".
8087 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8088 prefix string with which any file named in a -C command line option
8091 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8092 is retained for -C and -D only if the caller of Exim is root. Without
8093 it, the exim user may also use -C and -D and retain privilege.
8095 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8096 command line option is disabled.
8098 6. Macro names set by the -D option must start with an upper case letter, just
8099 like macro names defined in the configuration file.
8101 7. Added "dereference=" facility to LDAP.
8103 8. Two instances of the typo "uknown" in the source files are fixed.
8105 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8106 the Configure-Makefile script screwed up while processing it.
8108 10. Incorporated PCRE 4.4.
8110 11. The SMTP synchronization check was not operating right at the start of an
8111 SMTP session. For example, it could not catch a HELO sent before the client
8112 waited for the greeting. There is now a check for outstanding input at the
8113 point when the greeting is written. Because of the duplex, asynchronous
8114 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8115 way, but not yet received, when the check is performed.
8117 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8118 on TCP/IP sockets, because this apparently causes some broken clients to
8121 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8122 unchanged) from the Cygwin maintainer.
8124 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8125 was supported instead of testing for mbx. Effectively a typo.
8127 15. The spa authenticator server code was not checking that the input it
8128 received was valid base64.
8130 16. The debug output line for the "set" modifier in ACLs was not showing the
8131 name of the variable that was being set.
8133 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8135 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8136 lookup on its own. Something else was needed to trigger the lookup. For
8137 example, a match in host_lookup or the need for a host name in a host list.
8138 Now, if $sender_host_name is referenced and the host name has not yet been
8139 looked up, a lookup is performed. If the lookup fails, the variable remains
8140 empty, and $host_lookup_failed is set to "1".
8142 19. Added "eqi" as a case-independent comparison operator.
8144 20. The saslauthd authentication condition could segfault if neither service
8145 nor realm was specified.
8147 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8148 error message that was logged was misleading, and incoming SMTP
8149 connections were dropped. The message is now more accurate, and temporary
8150 errors are given to SMTP connections.
8152 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8153 (except RSET) with a 421 error, until QUIT is received. However, it was
8154 failing to send a response to QUIT.
8156 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8157 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8158 ACL is now run after the helo_try_verify_hosts code.
8160 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8161 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8162 case-independent, so other case variants are also recognized). Apparently
8163 some systems use these upper case variants.
8165 25. If more than two messages were waiting for the same host, and a transport
8166 filter was specified for the transport, Exim sent two messages over the
8167 same TCP/IP connection, and then failed with "socket operation on non-
8168 socket" when it tried to send the third.
8170 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8172 27. The extern definition of crypt16() in expand.c was not being excluded when
8173 the OS had its own crypt16() function.
8175 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8176 as a preferred synonym for return_size_limit, both as an option and as an
8179 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8181 30. Changed the default configuration ACL to relax the local part checking rule
8182 for addresses that are not in any local domains. For these addresses,
8183 slashes and pipe symbols are allowed within local parts, but the sequence
8184 /../ is explicitly forbidden.
8186 31. SPA server authentication was not clearing the challenge buffer before
8189 32. log_message in a "warn" ACL statement was writing to the reject log as
8190 well as to the main log, which contradicts the documentation and doesn't
8191 seem right (because no rejection is happening). So I have stopped it.
8193 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8194 However, I am unable to do any testing of this.
8196 34. Fixed an infelicity in the appendfile transport. When checking directories
8197 for a mailbox, to see if any needed to be created, it was accidentally
8198 using path names with one or more superfluous leading slashes; tracing
8199 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8201 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8202 contents are added to the log line that is written for every discarded
8203 recipient. (Previously a log_message setting was ignored.)
8205 36. The ${quote: operator now quotes the string if it is empty.
8207 37. The install script runs exim in order to find its version number. If for
8208 some reason other than non-existence or emptiness, which it checks, it
8209 could not run './exim', it was installing it with an empty version number,
8210 i.e. as "exim-". This error state is now caught, and the installation is
8213 38. An argument was missing from the function that creates an error message
8214 when Exim fails to connect to the socket for saslauthd authentication.
8215 This could cause Exim to crash, or give a corrupted message.
8217 39. Added isip, isip4, and isip6 to ${if conditions.
8219 40. The ACL variables $acl_xx are now saved with the message, and can be
8220 accessed later in routers, transports, and filters.
8222 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8223 strings in the file are not string-expanded.
8225 42. If a MAIL command specified a SIZE value that was too large to fit into an
8226 int variable, the check against message_size_limit failed. Such values are
8227 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8228 day this will have to be increased, but I don't think I want to be around
8229 when emails are that large.
8236 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8237 iconv() is not standard in FreeBSD.
8239 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8240 IPv6 enabled. The observed symptom was a segmentation fault on return from
8241 the function os_common_find_running_interfaces() in src/os.c.
8243 3. In the check_special_case() function in daemon.c I had used "errno" as an
8244 argument name, which causes warnings on some systems. This was basically a
8245 typo, since it was named "eno" in the comments!
8247 4. The code that waits for the clock to tick (at a resolution of some fraction
8248 of a second) so as to ensure message-id uniqueness was always waiting for
8249 at least one whole tick, when it could have waited for less. [This is
8250 almost certainly not relevant at current processor speeds, where it is
8251 unlikely to ever wait at all. But we try to future-proof.]
8253 5. The function that sleeps for a time interval that includes fractions of a
8254 second contained a race. It did not block SIGALRM between setting the
8255 timer, and suspending (a couple of lines later). If the interval was short
8256 and the sigsuspend() was delayed until after it had expired, the suspension
8257 never ended. On busy systems this could lead to processes getting stuck for
8260 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8261 process, before it forks any delivery processes. The open lookup caching
8262 mechanism meant that the open file or database connection was passed into
8263 the delivery process. The problem was that delivery processes always tidy
8264 up cached lookup data. This could cause a problem for the next delivery
8265 process started by the queue runner, because the external queue runner
8266 process does not know about the closure. So the next delivery process
8267 still has data in the lookup cache. In the case of a file lookup, there was
8268 no problem because closing a file descriptor in a subprocess doesn't affect
8269 the parent. However, if the lookup was caching a connection to a database,
8270 the connection was closed, and the second delivery process was likely to
8271 see errors such as "PGSQL: query failed: server closed the connection
8272 unexpectedly". The problem has been fixed by closing all cached lookups
8273 in a queue runner before running a delivery process.
8275 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8276 seem to have the "const" qualifier which it has on other OS. I've
8279 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8280 *of the same type* (client or server) with the same public name that an
8281 error should be diagnosed.
8283 9. When Exim looked up a host name for an IP address, but failed to find the
8284 original IP address when looking up the host name (a safety check), it
8285 output the message "<ip address> does not match any IP for NULL", which was
8286 confusing, to say the least. The bug was that the host name should have
8287 appeared instead of "NULL".
8289 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8290 user that is built into the binary, and the -C or -D options is used, root
8291 privilege is dropped before the configuration file is read. In addition,
8292 logging is switched to stderr instead of the normal log files. If the
8293 configuration then re-defines the Exim user, the unprivileged environment
8294 is probably not what is expected, so Exim logs a panic warning message (but
8297 However, if deliver_drop_privilege is set, the unprivileged state may well
8298 be exactly what is intended, so the warning has been cut out in that case,
8299 and Exim is allowed to try to write to its normal log files.
8305 1. smtp_return_error_details was not giving details for temporary sender
8306 or receiver verification errors.
8308 2. Diagnose a configuration error if two authenticators have the same public
8311 3. Exim used not to create the message log file for a message until the first
8312 delivery attempt. This could be confusing when incoming messages were held
8313 for policy or load reasons. The message log file is now created at the time
8314 the message is received, and an initial "Received" line is written to it.
8316 4. The automatically generated man page for command line options had a minor
8317 bug that caused no ill effects; however, a more serious problem was that
8318 the procedure for building the man page automatically didn't always
8319 operate. Consequently, release 4.20 contains an out-of-date version. This
8320 shouldn't happen again.
8322 5. When building Exim with embedded Perl support, the script that builds the
8323 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8324 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8326 6. The freeze_tell option was not being used for messages that were frozen on
8327 arrival, either by an ACL or by local_scan().
8329 7. Added the smtp_incomplete_transaction log selector.
8331 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8332 was accepting AUTH without a new EHLO.
8334 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8335 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8338 10. Logging of TCP/IP connections (when configured) now happens in the main
8339 daemon process instead of the child process, so that the TCP/IP connection
8340 count is more accurate (but it can never be perfect).
8342 11. The use of "drop" in a nested ACL was not being handled correctly in the
8343 outer ACL. Now, if condition failure induced by the nested "drop" causes
8344 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8345 or "require"), the connection is dropped.
8347 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8348 that yield "discard" can now be used with an "accept" or a "discard" verb,
8349 but an error is generated for any others (because I can't see a useful way
8350 to define what should happen).
8352 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8353 are now processed in the same way as lines in the Exim configuration file.
8354 In particular, continuation lines are supported.
8356 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8358 15. Added -ti meaning -t -i.
8360 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8361 domains, and warn by logging if others are found.
8363 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8364 returned from GIFCONF when Exim is trying to find the list of interfaces on
8365 a host. The code in os.c has been modified to copy each ifreq to an aligned
8366 structure in all cases.
8368 Also, in some cases, the returned ifreq's were being copied to a 'struct
8369 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8370 means the last couple of bytes of an IPv6 address could be chopped if the
8371 ifreq contained only a normal sockaddr (14 bytes storage).
8373 18. Named domain lists were not supported in the hosts_treat_as_local option.
8374 An entry such as +xxxx was not recognized, and was treated as a literal
8377 19. Ensure that header lines added by a DATA ACL are included in the reject log
8378 if the ACL subsequently rejects the message.
8380 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8381 MD5 (which is deprecated).
8383 21. When testing a filter file using -bf, Exim was writing a message when it
8384 took the sender from a "From " line in the message, but it was not doing so
8385 when it took $return_path from a Return-Path: header line. It now does.
8387 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8388 with a valid header line field name (a series of printing characters
8389 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8391 23. Changed "disc" in the source to "disk" to conform to the documentation and
8392 the book and for uniformity.
8394 24. Ignore Sendmail's -Ooption=value command line item.
8396 25. When execve() failed while trying to run a command in a pipe transport,
8397 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8398 could be confused with a return value of 69 from the command itself. This
8399 has been changed to 127, the value the shell returns if it is asked to run
8400 a non-existent command. The wording for the related log line suggests a
8401 non-existent command as the problem.
8403 26. If received_header_text expands to an empty string, do not add a Received:
8404 header line to the message. (Well, it adds a token one on the spool, but
8405 marks it "old" so that it doesn't get used or transmitted.)
8407 27. Installed eximstats 1.28 (addition of -nt option).
8409 28. There was no check for failure on the call to getsockname() in the daemon
8410 code. This can fail if there is a shortage of resources on the system, with
8411 ENOMEM, for example. A temporary error is now given on failure.
8413 29. Contrary to the C standard, it seems that in some environments, the
8414 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8415 program. Exim now does this explicitly; it affects the formatting of
8416 timestamps using strftime().
8418 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8419 complaints. I've now initialized all the variables, to avoid this.
8421 32. Header lines added by a system filter were not being "seen" during
8422 transport-time rewrites.
8424 33. The info_callback() function passed to OpenSSL is set up with type void
8425 (*)(SSL *, int, int), as described somewhere. However, when calling the
8426 function (actually a macro) that sets it up, the type void(*)() is
8427 expected. I've put in a cast to prevent warnings from picky compilers.
8429 34. If a DNS black list lookup found a CNAME record, but there were no A
8430 records associated with the domain it pointed at, Exim crashed.
8432 35. If a DNS black list lookup returned more than one A record, Exim ignored
8433 all but the first. It now scans all returned addresses if a particular IP
8434 value is being sought. In this situation, the contents of the
8435 $dnslist_value variable are a list of all the addresses, separated by a
8438 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8439 to accept a host name and all its aliases if the forward lookup for any of
8440 them yielded the IP address of the incoming connection. Now it accepts only
8441 those names whose forward lookup yields the correct IP address. Any other
8442 names are discarded. This closes a loophole whereby a rogue DNS
8443 administrator could create reverse DNS records to break through a
8444 wildcarded host restriction in an ACL.
8446 37. If a user filter or a system filter that ran in a subprocess used any of
8447 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8448 the wrong values were passed to the pipe command ($thisaddress had the
8449 value of $0, $0 had the value of $1, etc). This bug was introduced by
8450 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8452 38. Improved the line breaking for long SMTP error messages from ACLs.
8453 Previously, if there was no break point between 40 and 75 characters, Exim
8454 left the rest of the message alone. Two changes have been made: (a) I've
8455 reduced the minimum length to 35 characters; (b) if it can't find a break
8456 point between 35 and 75 characters, it looks ahead and uses the first one
8457 that it finds. This may give the occasional overlong line, but at least the
8458 remaining text gets split now.
8460 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8461 file descriptors might be low, and that setting 1000 would always raise it.
8462 It turns out that in some environments, the limit is already over 1000 and
8463 that lowering it causes trouble. So now Exim takes care not to decrease it.
8465 40. When delivering a message, the value of $return_path is set to $sender_
8466 address at the start of routing (routers may change the value). By an
8467 oversight, this default was not being set up when an address was tested by
8468 -bt or -bv, which affected the outcome if any router or filter referred to
8471 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8472 log only when "message" or "log_message" are set. However, if one of the
8473 conditions was an address verification, or a call to a nested ACL, the
8474 messages generated by the underlying test were being passed through. This
8475 no longer happens. The underlying message is available in $acl_verify_
8476 message for both "message" and "log_message" expansions, so it can be
8477 passed through if needed.
8479 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8480 new expansion $bh_ to give the encoded byte string without charset
8481 translation. Translation happens only if iconv() is available; HAVE_ICONV
8482 indicates this at build time. HEADERS_CHARSET gives the charset to
8483 translate to; headers_charset can change it in the configuration, and
8484 "headers charset" can change it in an individual filter file.
8486 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8487 that creates RFC 2047 encoded "words" labels them as that charset instead
8488 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8489 expansion operator; (ii) when Exim creates a From: line for a local
8490 message; (iii) when a header line is rewritten to include a "phrase" part.
8492 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8493 buggy, causing it to skip the first lines of messages whose message ID
8494 ended in 'D'. This would not have bitten before Exim release 4.14, because
8495 message IDs were unlikely to end in 'D' before then. The effect was to have
8496 incorrect size information for certain domains.
8498 45. #include "config.h" was missing at the start of the crypt16.c module. This
8499 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8502 46. If there was a timeout during a "random" callout check, Exim treated it as
8503 a failure of the random address, and carried on sending RSET and the real
8504 address. If the delay was just some slowness somewhere, the response to the
8505 original RCPT would be taken as a response to RSET and so on, causing
8506 mayhem of various kinds.
8508 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8509 when I implemented it. It didn't allow for the fact that some option values
8510 may legitimately be negative (e.g. size_addition), and it didn't even do
8511 the right test for positive values.
8513 48. Domain names in DNS records are case-independent. Exim always looks them up
8514 in lower case. Some resolvers return domain names in exactly the case they
8515 appear in the zone file, that is, they may contain uppercase letters. Not
8516 all resolvers do this - some return always lower case. Exim was treating a
8517 change of case by a resolver as a change of domain, similar to a widening
8518 of a domain abbreviation. This triggered its re-routing code and so it was
8519 trying to route what was effectively the same domain again. This normally
8520 caused routing to fail (because the router wouldn't handle the domain
8521 twice). Now Exim checks for this case specially, and just changes the
8522 casing of the domain that it ultimately uses when it transmits the message
8525 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8528 50. If a filter generated a file delivery with a non-absolute name (possible if
8529 no home directory exists for the router), the forbid_file option was not
8532 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8533 the existing equality matching.
8535 52. Exim was using ints instead of ino_t variables in some places where it was
8536 dealing with inode numbers.
8538 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8539 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8540 called TMPDIR, and if it finds it is different, it changes its value.
8542 54. The smtp_printf() function is now made available to local_scan() so
8543 additional output lines can be written before returning. There is also an
8544 smtp_fflush() function to enable the detection of a dropped connection.
8545 The variables smtp_input and smtp_batched_input are exported to
8548 55. Changed the default runtime configuration: the message "Unknown user"
8549 has been removed from the ACL, and instead placed on the localuser router,
8550 using the cannot_route_message feature. This means that any verification
8551 failures that generate their own messages won't get overridden. Similarly,
8552 the "Unrouteable address" message that was in the ACL for unverifiable
8553 relay addresses has also been removed.
8555 56. Added hosts_avoid_esmtp to the smtp transport.
8557 57. The exicyclog script was not checking for the esoteric option
8558 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8559 will work only if exicyclog is run under the appropriate euid.
8561 58. Following a discussion on the list, the rules by which Exim recognises line
8562 endings on incoming messages have been changed. The -dropcr and drop_cr
8563 options are now no-ops, retained only for backwards compatibility. The
8564 following line terminators are recognized: LF CRLF CR. However, special
8565 processing applies to CR:
8567 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8568 nor a local message in the state where . is a terminator.
8570 (ii) If a bare CR is encountered in a header line, an extra space is added
8571 after the line terminator so as not to end the header. The reasoning
8572 behind this is that bare CRs in header lines are most likely either
8573 to be mistakes, or people trying to play silly games.
8575 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8576 was being incorrectly given as 18 bytes larger than it should have been.
8577 This is a VOB (very old bug).
8579 60. This may never have affected anything current, but just in case it has:
8580 When the local host is found other than at the start of a list of hosts,
8581 the local host, those with the same MX, and any that follow, are discarded.
8582 When the list in question was part of a longer list of hosts, the following
8583 hosts (not currently being processed) were also being discarded. This no
8584 longer happens. I'm not sure if this situation could ever has previously
8587 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8590 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8591 header. This is something that is recommended in a new Internet Draft, and
8592 is something that is documented as being done by Sendmail. There are two
8593 possible values. For messages generated by the autoreply transport, Exim
8596 Auto-Submitted: auto-replied
8598 whereas for all other generated messages (e.g. bounces) it adds
8600 Auto-Submitted: auto-generated
8602 63. The "personal" condition in filters now includes a test for the
8603 Auto-Submitted: header. If it contains the string "auto-" the message it
8604 not considered personal.
8606 64. Added rcpt_include_affixes as a generic transport option.
8608 65. Added queue_only_override (default true).
8610 66. Added the syslog_duplication option.
8612 67. If what should have been the first header line of a message consisted of
8613 a space followed by a colon, Exim was mis-interpreting it as a header line.
8614 It isn't of course - it is syntactically invalid and should therefore be
8615 treated as the start of the message body. The misbehaviour could have
8616 caused a number of strange effects, including loss of data in subsequent
8617 header lines, and spool format errors.
8619 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8620 client host had authenticated. This control can now be exercised by an ACL
8621 for more flexibility.
8623 69. By default, callouts do not happen when testing with -bh. There is now a
8624 variant, -bhc, which does actually run the callout code, including
8625 consulting and updating the callout cache.
8627 70. Added support for saslauthd authentication, courtesy of Alexander
8630 71. If statvfs() failed on the spool or log directories while checking their
8631 size for availability, Exim confusingly gave the error "space shortage".
8632 Furthermore, in debugging mode it crashed with a floating point exception.
8633 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8634 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8635 serious problem, Exim now writes to the main and panic logs when this
8636 happens, with details of the failure. It then refuses to accept the
8637 incoming message, giving the message "spool directory problem" or "log
8638 directory problem" with a 421 code for SMTP messages.
8640 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8641 0, 1, and 2 exist, because some OS complain for execs without them (see
8642 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8643 descriptors. However, the code omitted to check that the open succeeded,
8644 causing mysterious errors if for some reason the permissions on /dev/null
8645 got screwed. Now Exim writes a message to the main and panic logs, and
8646 bombs out if it can't open /dev/null.
8648 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8649 interact so that it is all more flexible. It is supposed to remain
8650 backwards compatible. Also added extra_local_interfaces.
8652 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8653 to bomb out with an assertion failure - to the client this appears as a
8654 connection drop. This problem occurs in the part of the code that was taken
8655 from the Samba project. Fortunately, the assertion is in a very simple
8656 function, so I have fixed this by reproducing the function inline in the
8657 one place where it is called, and arranging for authentication to fail
8658 instead of killing the process with assert().
8660 75. The SPA client code was not working when the server requested OEM rather
8661 than Unicode encoding.
8663 76. Added code to make require_files with a specific uid setting more usable in
8664 the case where statting the file as root fails - usually a non-root-mounted
8665 NFS file system. When this happens and the failure is EACCES, Exim now
8666 forks a subprocess and does the per-uid checking as the relevant uid.
8668 77. Added process_log_path.
8670 78. If log_file_path was not explicitly set, a setting of check_log_space or
8671 check_log_inodes was ignored.
8673 79. If a space check for the spool or log partitions fails, the incident is now
8674 logged. Of course, in the latter case the data may get lost...
8676 80. Added the %p formatting code to string_format() so that it can be used to
8677 print addresses in debug_print(). Adjusted all the address printing in the
8678 debugging in store.c to use %p rather than %d.
8680 81. There was a concern that a line of code in smtp_in.c could overflow a
8681 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8682 initially expressed, the concern was not well-founded, because trailing
8683 spaces are removed early. However, if the trailing spaces were followed by
8684 a NULL, they did not get removed, so the overflow was possible. Two fixes
8687 (a) I re-wrote the offending code in a cleaner fashion.
8688 (b) If an incoming SMTP command contains a NULL character, it is rejected
8691 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8692 runs initgroups(), so that if the Exim user is in any additional groups,
8693 they will be used during message reception.
8699 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob