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 sole initial provider is
14 sqlite, and is used for the wait-transport and retry DBs. Transactions
15 imply locking internal to the DB. We no longer need a separate lockfile,
16 can keep the DB handle open for extended periods, yet potentially benefit
17 from concurrency on non-conflicting record uses.
19 JH/03 With dkim_verify_minimal, avoid calling the DKIM ACL after the first
25 JH/01 Support list of dkim results in the dkim_status ACL condition, making
26 it more usable in the data ACL.
28 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
29 Previously This was only logged, on the assumption that errors would be
30 seen for a previous fflush(). However, a fuse filesystem has been
31 reported as showing this an error for the fclose(). The spool is now in
32 an uncertain state, and we have logged and responded acceptance. Change
33 this to respond with a temp-reject, wipe spoolfiles, and log the error
36 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
37 during a recipient verify callout, a QUIT command was attempted on the
38 now-closed callout channel, causing a paniclog entry.
40 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
41 a connection_reject log_selector, under tls_on_connect. Previously
42 with this combination, when the connect ACL rejected, a spurious
43 paniclog entry was made.
45 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
46 of loadbalancer-detection for resumption, in 4.96 - which tries to
47 use the EHLO response. SMTPS does not have one at the time it is starting
48 TLS. Change the default for the smtp transport host_name_extract option
49 to be a static string, for TLS-on-connect cases; meaning that resumption
50 will always be attempted (unless deliberately overriden).
52 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
53 chunk-separator specification. This was broken by hardening introduced
56 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
57 included the -H with the id; this also messed up exiqgrep.
59 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
60 was not properly skipped and empty elements would cause mis-parsing.
61 Tighten parsing of DKIM header records. Previously, all but lowercase
62 alpha chars would be ignored in potential tag names.
64 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
65 being searched. Previously we only had one for IPv4 addresses. Per the
66 documentation, the error results by default in a no-match result for the
67 list. It is logged if the unknown_in_list log_selector is used.
69 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
70 the routing operation. Previously it would silently stop routing the
73 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
74 info-request event close in time to a scheduled run timer could result in
75 the latter being missed, and no further queue scheduled runs being
76 initiated. This ouwld be more likely on high-load systems.
78 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
79 LF-only mode (as detected from the first header line). Previously we did
80 accept that in (normal) CRLF mode; this has been raised as a possible
81 attack scenario (under the name "smtp smuggling").
83 JH/13 Add an fdatasync call for the received message data file in spool, before
84 loggging reception and sending the SMTP ack. Previously we only flushed
85 the stdio buffer so there was still the possibility of a disk error.
87 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
88 address. Previously, for the last address in a header line (commonly
89 there is only one) the terminating newline was part of the logged
92 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
93 header, when parsing for address-qualification. Previously one was only
94 written if there were rewrite rules.
96 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
99 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
100 the multiple-queue-runners facility for 4.97 broke this, giving only a
101 one-time run of the queue.
103 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
106 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
107 TLS session resulted in a forced-fail, a misleading error was logged for
108 the expansino of tls_certificates. This would affect the common case of
109 that option being set (main-section options) but not having any variable
110 parts. It could also potentially affect tls_privatekeys. The underlyding
111 coding errors go back to 4.90 but were only exposed in 4.97.
113 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
114 pcre2 library starting allocating 20kB rather than 112 bytes per match
115 call, which broke the 2GB total limitation on Exim's memory management
116 when a user had over 104207 messages stored and the appendfile
117 maildir_quota_directory_regex option is in use. Release the allocated
118 memory every thosand files to avoid this.
119 The same issue arises with the ACL regex condition, which is applied
120 to every line of a received message.
122 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
123 which all recipients had been handled (itself an issue) a null-pointer
124 deref was done on trying to write a retry record. Fix that by counting
125 the outstanding recipients before trying to transmit the message.
126 The situation arose for a second MX try within a transport run, when the
127 first had perm-rejected a recipient (the only one for the connection, in
128 the case seen) during pipelining, and then closed the TCP connection.
129 The transport classified that as an I/O error, leaving the message
130 outstanding but having marked up the recipient as dealt-with. It then
131 tried another MX because of the I/O error. Fix this by converting the
132 message-level status to ok if there was a close but all recipients were
133 dealt with. Thanks to Wolfgand Breyha for debug runs.
135 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
136 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
138 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
140 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
141 option specified a fixed address, later rewriting on that address would
142 trip on the configuration data being readonly. Instead of modifying
143 in-place, copy data. Found and fixed by Peter Benie.
145 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
146 data a null pointer was followed. Find and testcase by Sebastian Bugge.
148 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
149 decimal 127 chars were not encoded, and lowercase hex was used for
150 encoded values. Outstanding since at least 1999.
152 JH/27 Fix crash in logging. When a message with a large number of recipients
153 had been received, and logging of recipients is enabled, the buffer used
154 for logging could reach limit. A read using a null pointer would then
155 be done, resulting in a crash of the receiving process before an SMTP
156 ACK for the message was returned to the sending system. Duplicate
157 messages were created as a result.
158 Find and debug help by Mateusz Krawczyk
160 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
161 DB, wrapping transport record bare-ip "host names" and ipv6
162 "host addresses" in square-brackets. This makes the parsing that
163 exinext does more reliable.
165 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
168 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
170 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
171 ipv6 addresses for the sender. Previously the uncompressed form was used,
172 and if used in textual form this would result in behavior difference
175 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
176 now classed as a protocol error and subject to smtp_max_synprot_errors.
178 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
179 ".." and has following characters.
181 JH/34 Fix delivery ordering for 2-phase queue run combined with
184 JH/35 Bug 3099: fix parsing of MIME filename= split over multiple paramemters.
185 Previously the $mime_filename variable would have an incorrect value.
186 While in the code, extend coverage to name= which previously was only
187 supported for single parameters, despite also filling in $mime_filename.
193 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
194 SMTP connection" log lines.
196 JH/02 Option default value updates:
197 - queue_fast_ramp (main) true (was false)
198 - remote_max_parallel (main) 4 (was 2)
200 JH/03 Cache static regex pattern compilations, for use by ACLs.
202 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
203 Make the rewrite never match and keep the logging. Trust the
204 admin to be using verify=header-syntax (to actually reject the message).
206 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
207 (under Linux) we watch the dir containing the final file; previously
208 it would be the dir with the first symlink. We still do not monitor
211 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
212 dn_expand() is happy to pass them through.
214 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
215 the file with the proof had an unchanged name, the new proof(s) were
216 loaded on top of the old ones (and nover used; the old ones were stapled).
218 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
219 more than one message arrived in a single connection a reference from
220 the earlier message could be re-used. Often a sigsegv resulted.
221 These variables were introduced in Exim 4.87.
222 Debug help from Graeme Fowler.
224 JH/09 Fix ${filter } for conditions that modify $value. Previously the
225 modified version would be used in construction the result, and a memory
228 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
229 Find and fix by Jasen Betts.
231 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
232 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
233 the systemwide configuration to override the Exim config.
235 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
236 API changes in libopendmarc.
238 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
239 pid 1, in the normal "background daemon" mode, having to drop process-
240 group leadership also lost track of needing to create listener sockets.
242 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
243 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
245 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
246 a capture group which obtained no text (eg. "(abc)*" matching zero
247 occurrences) could cause a segfault if the corresponding $<n> was
250 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
251 included a close-brace character (eg. it itself used an expansion) an
254 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
255 starting TLS. Previously it was after, meaning that attackers on such
256 ports had to be screened using the host_reject_connection main config
257 option. The new sequence aligns better with the STARTTLS behaviour, and
258 permits defences against crypto-processing load attacks, even though it
259 is strictly an incompatible change.
260 Also, avoid sending any SMTP fail response for either the connect ACL
261 or host_reject_connection, for TLS-on-connect ports.
263 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
264 Previously this was not permitted, but it makes reasonable sense.
265 While there, restore a restriction on using it from a connect ACL; given
266 the change JH/16 it could only return false (and before 4.91 was not
269 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
270 was exactly sized compared to the log buffer, a crash occurred with the
271 misleading message "bad memory reference; pool not found".
272 Found and traced by Jasen Betts.
274 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
275 dns_again_means_nonexist included an element causing a DNS lookup which
276 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
277 included (though probably not limited to) a process crash from stack
278 memory limit, or from excessive open files. Replace this with a paniclog
279 whine (as this is likely a configuration error), and returning
282 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
283 this always failed, probably leading to the usual downgrade to in-clear
286 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
287 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
288 to not checking that list for these lookups.
290 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
293 JH/23 Fix crash in string expansions. Previously, if an empty variable was
294 immediately followed by an expansion operator, a null-indirection read
295 was done, killing the process.
297 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
298 include an SMTP response string which is longer than that supported
299 by the delivering transport. Alleviate by wrapping such lines before
302 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
303 chars (RFC limit). Previously a limit of 12 items was made, which with
304 a not-impossible References: in the message being bounced could still
305 be over-large and get stopped in the transport.
307 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
308 close. Previously a bare socket close was done.
310 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
313 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
314 message being considered for delivery was already being handled by
315 another process, and having an SMTP connection already open, the function
316 to close it tried to use an uninitialized variable. This would afftect
317 high-volume sites more, especially when running mailing-list-style loads.
318 Pollution of logs was the major effect, as the other process delivered
319 the message. Found and partly investigated by Graeme Fowler.
321 JH/29 Change format of the internal ID used for message identification. The old
322 version only supported 31 bits for a PID element; the new 64 (on systems
323 which can use Base-62 encoding, which is all currently supported ones
324 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
325 and must use Base-36). The new ID is 23 characters rather than 16, and is
326 visible in various places - notably logs, message headers, and spool file
327 names. Various of the ancillary utilities also have to know the format.
328 As well as the expanded PID portion, the sub-second part of the time
329 recorded in the ID is expanded to support finer precision. Theoretically
330 this permits a receive rate from a single comms channel of better than the
332 The major timestamp part of the ID is not changed; at 6 characters it is
333 usable until about year 3700.
334 Updating from previously releases is fully supported: old-format spool
335 files are still usable, and the utilities support both formats. New
336 message will use the new format. The one hints-DB file type which uses
337 message-IDs (the transport wait- DB) will be discarded if an old-format ID
338 is seen; new ones will be built with only new-format IDs.
339 Optionally, a utility can be used to convert spool files from old to new,
340 but this is only an efficiency measure not a requirement for operation
341 Downgrading from new to old requires running a provided utility, having
342 first stopped all operations. This will convert any spool files from new
343 back to old (losing time-precision and PID information) and remove any
344 wait- hints databases.
346 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
347 we treated them as item separators when parsing for a list item, but they
348 need to be protected by the doublequotes. While there, add handling for
351 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
352 Found and fixed by Jasen Betts. No testcase for this as my usual text
353 editor insists on emitting only valid UTF-8.
355 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
356 a null-indirection SIGSEGV for the receive process.
358 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
359 -bh use. Internal checking would spot this and take a panic.
361 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
362 In 4.96 this would expand to empty.
364 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
365 certificate. Find and fix by Andreas Metzler.
367 JH/36 Add ARC info to DMARC hostory records.
369 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
370 or fakedefer. Previously the sender could discover that the message
371 had in fact been accepted.
373 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
374 sequences. Previously the input was not noted as being tainted; notably
375 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
376 bad coding of authenticators.
378 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
379 and ${tr...}. Found and diagnosed by Heiko Schlichting.
381 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
382 could be triggered by externally-supplied input. Found by Trend Micro.
385 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
386 be triggered by externally-controlled input. Found by Trend Micro.
389 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
390 be triggered by externally-controlled input. Found by Trend Micro.
393 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
394 Make the rewrite never match and keep the logging. Trust the
395 admin to be using verify=header-syntax (to actually reject the message).
397 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
400 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
406 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
407 after reception to before a subsequent reception. This should
408 mean slightly faster delivery, and also confirmation of reception
411 JH/02 Move from using the pcre library to pcre2. The former is no longer
412 being developed or supported (by the original developer).
414 JH/03 Constification work in the filters module required a major version
415 bump for the local-scan API. Specifically, the "headers_charset"
416 global which is visible via the API is now const and may therefore
417 not be modified by local-scan code.
419 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
420 sendfile() didi not account for the way the ClamAV driver code called it.
422 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
423 time check was being done for every character; replace that with one
426 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
427 sent was prefixed with a length byte.
429 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
430 RFC 5321. Previously Dovecot (at least) would log errors during
433 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
434 in 4.61 without a reason logged. Binaries will be bigger, which might
435 matter on diskspace-constrained systems, but debug is easier.
437 JH/09 Fix macro-definition during "-be" expansion testing. The move to
438 write-protected store for macros had not accounted for these runtime
439 additions; fix by removing this protection for "-be" mode.
441 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
442 handing out large-numbered file descriptors, violating the usual Unix
443 assumption (and required by Posix) that the lowest possible number will be
444 allocated by the kernel when a new one is needed. In the daemon, and any
445 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
446 are not useable for FD_SET() [and hence select()] and overwrite the stack.
447 Assorted crashes happen.
449 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
450 main-section options or in a connect ACL, the value from the first ever
451 connection was never replaced for subsequent connections. Found by
454 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
455 though only once PCRE2 was introduced: the memory accounting used under
456 debug offset allocations by an int, giving a hard trap in early startup.
457 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
459 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
460 with underbars is given. The write-protection of configuration introduced
461 in 4.95 trapped when normalisation was applied to an option not needing
464 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
466 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
467 failing to close the certificates directory, every hour or any time it
470 JH/16 Debugging initiated by an ACL control now continues through into routing
471 and transport processes. Previously debugging stopped any time Exim
472 re-execs, or for processing a queued message.
474 JH/17 The "expand" debug selector now gives more detail, specifically on the
475 result of expansion operators and items.
477 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
478 bad comparison between the option value and the name of the file to
479 be included was done, and a mismatch was wrongly identified.
480 4.88 to 4.95 are affected.
482 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
484 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
485 supplied as the db file-pair basename. Previously, if a directory
486 path was given, for example via the autoreply "once" option, the DB
487 file.pag and file.dir files would be created in that directory's
490 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
491 "taint" log_selector. These were previously deprecated.
493 JH/22 Fix static address-list lookups to properly return the matched item.
494 Previously only the domain part was returned.
496 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
497 the call into OpenSSL to send a TLS Close was being repeated; this
498 resulted in the library waiting for the peer's Close. If that was never
499 sent we waited forever. Fix by tracking send calls.
501 JH/24 The ${run} expansion item now expands its command string elements after
502 splitting. Previously it was before; the new ordering makes handling
503 zero-length arguments simpler. The old ordering can be obtained by
504 appending a new option "preexpand", after a comma, to the "run".
506 JH/25 Taint-check exec arguments for transport-initiated external processes.
507 Previously, tainted values could be used. This affects "pipe", "lmtp" and
508 "queryprogram" transport, transport-filter, and ETRN commands.
509 The ${run} expansion is also affected: in "preexpand" mode no part of
510 the command line may be tainted, in default mode the executable name
513 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
514 the the facility was not passed across execs, and only the first message
515 passed over a connection could use BDAT; any further ones using DATA.
517 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
518 uses $sending_ip_address and an interface is specified.
519 Previously any use of the local address in the EHLO name disabled
520 PIPECONNECT, the common case being to use the rDNS of it.
522 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
523 resumption. Previously verify failed because no certificate status is
524 passed on the wire for the restarted session. Fix by using the recorded
525 ocsp status of the stored session for the new connection.
527 JH/29 TLS resumption: the key for session lookup in the client now includes
528 more info that a server could potentially use in configuring a TLS
529 session, avoiding oferring mismatching sessions to such a server.
530 Previously only the server IP was used.
532 JH/30 Fix string_copyn() for limit greater than actual string length.
533 Previously the copied amount was the limit, which could result in a
534 overlapping memcpy for newly allocated destination soon after a
535 source string shorter than the limit. Found/investigated by KM.
537 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
538 close; it may be needed for a subsequent connection. This caused a
539 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
541 JH/32 Fix CHUNKING for a second message on a connection when the first was
542 rejected. Previously we did not reset the chunking-offered state, and
543 erroneously rejected the BDAT command. Investigation help from
546 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
547 an empty address. Previously the expansion returned an error.
549 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
550 proxy. Previously these were misparsed, leading to paniclog entries.
556 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
557 related applications. Previously an "H" was used where available info
558 says that "M" should be, so change to match.
560 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
561 as arguments, so an implementation trying to copy these into a local
562 buffer was taking a taint-enforcement trap. Fix by using dynamically
563 created buffers. Similar fix for radius expansion condition.
565 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
566 reasonable, eg. to count headers. Fix by using dynamically created
567 buffers rather than a local. Do similar fixes for ACL actions "dcc",
568 "log_reject_target", "malware" and "spam"; the arguments are expanded
569 so could be handling tainted values.
571 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
572 broken the (no-op) support for this sendmail command. Restore it
573 to doing nothing, silently, and returning good status.
575 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
576 record path was given (or the default used) without a leading directory
577 path, an error occurred on trying to open it. Use the transport's working
580 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
581 transport. Previously it was the name on the DNS A-record; use instead
582 the head of the CNAME chain leading there (if there is one). This seems
583 to align better with RFC 6125.
585 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
586 smtp_accept_max_per_host allocated resources which were not released
587 when the limit was exceeded. This eventually crashed the daemon. Fix
588 by adding a release action in that path.
590 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
591 expanded; previously using tainted values was rejected. Fix by using
592 dynamically-created buffers.
594 JH/09 Relax restrictions on ACL verify condition needing access to message
595 headers. Previously they were only permitted in data and non-smtp ACLs;
596 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
597 not_blind, header_sender and header_names_ascii verification.
599 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
600 Previously a macro used one argument twice; when called with the
601 argument as an expression having side-effects, incorrect operation
602 resulted. Use an inlineable function.
604 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
605 held open for a verify callout. Previously this wan not accounted for
606 and a corrupt onward SMTP conversation resulted.
608 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
609 Previously they were embedded naively in the constructed address; when
610 needed, strip the quoting and quote the entire local_part.
611 Also make the inbound_srs expansion condition handle quoting.
613 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
614 excluded, not matching the documentation.
616 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
617 was given for the sqlite_dbfile a trap resulted.
619 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
620 "name" argument resulted in a trap. There is no reason to disallow such;
621 this was a coding error.
623 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
624 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
625 spent suspended, ignoring the POSIX definition. Previously we assumed
626 it did and a constant offset from real time could be used as a correction.
627 Change to using the same clock source for the start-of-message and the
628 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
629 exists, just to get a clock slightly more aligned to reality.
631 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
632 RFC says it is optional some validators care. The missing char was not
633 intended but triggered by a line-wrap alignment. Discovery and fix by
634 Guillaume Outters, hacked on by JH.
636 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
637 name being quoted was tainted a trap would be taken. Fix by using
638 dynamically created buffers. The routine could have been called by a
639 rewrite with the "h" flag, by using the "-F" command-line option, or
640 by using a "name=" option on a control=submission ACL modifier.
642 JH/19 SPF: change the Authentication-Results expansion component to give
643 smtp.helo when the sender domain is empty. Previously it gave
646 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
647 not in 127.0.0.0/8 to help in spotting list domains taken over by a
648 domain-parking registrar.
650 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
651 Previously when a whitespace character was specified it was not inserted
652 after removing the newline.
654 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
655 the domain part of the recipient address. This overrides any tls_sni
656 option set, which was previously used.
658 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
661 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
662 is_tainted() had an off-by-one error in the overenthusiastic direction.
663 Find and fix by Gavan. Although NetBSD is not a supported platform for
664 4.94 this bug could affect other platforms.
666 PP/01 Fix default prime selection to be consistent.
667 One path used ike23 still, instead of exim.dev.20160529.3; now both
668 execution flows will use the same DH primes (currently
669 exim.dev.20160529.3).
671 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
672 option in smtp transport, to match the documentation. Previously
673 verification was not being done in some cases where it should have been.
675 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
676 than one server was defined and depending on the platform memory layout
677 details, an internal consistency trap could be hit while walking the list
680 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
681 files. The value is used by the authresults expansion item. Previously
682 if this was used in a router or transport, a crash could result.
684 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
685 have a sufficient incidence of EINTR returns from select that an
686 interaction with other operations done by the main daemon loop exposed
687 a bug in the error-handling. This was benign apart from the log
690 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
691 for consistency with delivered "=>" and failed "**" lines. While we're
692 there, handle PRX and TFO.
694 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
695 applied. This resulted, if any header-line rewrite rules were configured,
696 in a panic-log triggerable by sending a message with a long address in
697 a header. Fix by increasing the arbitrary limit to larger than a single
698 (dewrapped) 5322 header line maximum size.
700 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
701 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
702 RFC 6648 which deprecates X- options in protocols as a general practice.
703 Changeover between the implementations is handled by the mechanisms
706 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
707 a remote which uses callout/hold. Previously the local was queued.
709 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
712 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
713 log line. The asterisk is now consistently appended to the remote IP
714 (and port, if given), and will also be provided on defer and fail log
715 lines. Previously it could be placed on the local IP if that was being
716 logged, and was only provided on delivery lines.
718 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
720 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
721 authenticator client_send option. Previously the next char, after a pair
722 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
723 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
724 documentation. There is still no way to get a leading ^ immediately
725 after a NUL (ie. for the password of a PLAIN method authenticator.
727 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
728 files. For bad sizes read, delete the record and whine to paniclog.
730 JH/38 When logging an AUTH failure, as server, do not include sensitive
731 information. Previously, the credentials would be included if given
732 as part of the AUTH command line and an ACL denied authentication.
734 JH/39 Bug 2691: fix $local_part_data. When the matching list element
735 referred to a file, bad data was returned. This likely also affected
738 JH/40 The gsasl authenticator now supports caching of the salted password
739 generated by the client-side implementation. This required the addition
740 of a new variable: $auth4.
742 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
743 left undeleted; the attempt to re-create it then failed - resulting in
744 the usual "SIGHUP tp have daemon reload configuration" to not work.
745 This affected any platform not supporting "abstract" Unix-domain
746 sockets (i.e. not Linux).
748 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
749 recipients" response to RCPT in a later response, with a 250. The
750 previous coding assumed this would not happen, and under PIPELINING
751 would result in both lost and duplicate recipients for a message.
753 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
754 Previously the weighting was incorrectly applied. Similar fix for socks
755 proxies. Found and fixed by Heiko Schlichting.
757 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
758 not handle sub-lists included using the +namedlist syntax. While
759 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
760 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
763 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
764 Previously the permanent pool was used, so the store could not be freed.
765 This meant a connection with many messages would use continually-growing
768 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
769 per-pool so as not to waste too much space. Previously a constant size
770 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
771 DOS attacks harder. The cost is wasted memory use in the larger blocks.
773 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
774 same space repeatedly, and a smaller process footprint.
776 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
777 for GnuTLS. Previously the name started "%s" which, while not a bug,
778 looked as if if might be one.
780 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
781 "continued connection") make the $proxy_* variables available. Previously
782 the information was not passed across the exec() call for subsequent
783 transport executions. This also mean that the log lines for the
784 messages can show the proxy information.
786 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
787 receive time. With modern systems the difference is significant.
788 The historical behaviour can be restored by disabling (a new) log_selector
789 "queue_time_exclusive".
791 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
792 content) were specifically tested for. Now, also cover expansions
793 resulting in ACL names and inline ACL content.
795 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
796 making it unusable in complex expressions.
798 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
799 fail with a taint-check on the spoolfile name, and leave the message
802 HS/01 Enforce absolute PID file path name.
804 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
806 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
808 PP/02 Bug 2643: Correct TLS DH constants.
809 A missing NUL termination in our code-generation tool had led to some
810 incorrect Diffie-Hellman constants in the Exim source.
811 Reported by kylon94, code-gen tool fix by Simon Arlott.
813 PP/03 Impose security length checks on various command-line options.
814 Fixes CVE-2020-SPRSS reported by Qualys.
816 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
817 better. Reported by Qualys.
819 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
820 providing a particularly obnoxious sender full name.
823 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
825 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
828 PP/08 Change default for recipients_max from unlimited to 50,000.
830 PP/09 Fix security issue with too many recipients on a message (to remove a
831 known security problem if someone does set recipients_max to unlimited,
832 or if local additions add to the recipient list).
833 Fixes CVE-2020-RCPTL reported by Qualys.
835 PP/10 Fix security issue in SMTP verb option parsing
836 Fixes CVE-2020-EXOPT reported by Qualys.
838 PP/11 Fix security issue in BDAT state confusion.
839 Ensure we reset known-good where we know we need to not be reading BDAT
840 data, as a general case fix, and move the places where we switch to BDAT
841 mode until after various protocol state checks.
842 Fixes CVE-2020-BDATA reported by Qualys.
844 HS/03 Die on "/../" in msglog file names
846 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
847 the Exim runtime user are allowed to create files.
849 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
852 QS/03 When reading the output from interpreted forward files we do not
853 pass the pipe between the parent and the interpreting process to
854 executed child processes (if any).
856 QS/04 Always die if requested from internal logging, even is logging is
859 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
860 the API; compilation noo longer completes with DMARC support included.
861 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
862 been reported on other platforms.
864 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
866 JH/56 Make the majority of info read from config files readonly, for defence-in-
867 depth against exploits. Suggestion by Qualys.
868 Not supported on Solaris 10.
870 JH/57 Fix control=fakreject for a custom message containing tainted data.
871 Previously this resulted in a log complaint, due to a re-expansion present
872 since fakereject was originally introduced.
874 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
875 modifier was given, a loop resulted.
877 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
878 pipelined SMTP command followed the BDAT LAST then it would be
879 incorrectly treated as part of the message body, causing a verification
882 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
883 require looser validation rules than those for 821-level addresses,
884 which only permit IP addresses.
890 JH/01 Avoid costly startup code when not strictly needed. This reduces time
891 for some exim process initialisations. It does mean that the logging
892 of TLS configuration problems is only done for the daemon startup.
894 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
896 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
897 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
900 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
901 DKIM signing is being done. Previously a transport_filter would always
902 disable CHUNKING, falling back to traditional DATA.
904 JH/05 Regard command-line recipients as tainted.
906 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
908 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
909 PAM library frees one of the arguments given to it, despite the
910 documentation. Therefore a plain malloc must be used.
912 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
913 on-stack buffers were used, resulting in a taint trap when DSN information
914 copied from a received message was written into the buffer.
916 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
917 the ordering of its ARC headers. This caused a crash.
919 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
920 a new record was being constructed with information from the peer, a trap
923 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
924 installation would get error messages from DMARC verify, when it hit the
925 nonexistent file indicated by the default. Distros wanting DMARC enabled
926 should both provide the file and set the option.
927 Also enforce no DMARC verification for command-line sourced messages.
929 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
930 could, depending on the platform, hang at the STARTTLS response.
932 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
933 message on a connection. Previously if one message had ARC headers and
934 the following one did not, a crash could result when adding an
935 Authentication-Results: header.
937 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
938 Exim main code and Exim-related utities. The introduction of taint
939 tracking also did many adjustments to string handling. Since then, eximon
940 frequently terminated with an assert failure.
942 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
943 check for 452 responses. This slightly helps the inefficieny of doing
944 a large alias-expansion into a recipient-limited target. The max_rcpt
945 transport option still applies (and at the current default, will override
946 the new feature). The check is done for either cause of synch, and forces
947 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
948 connection. The new facility is not tunable at this time.
950 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
951 library live data was being used, so the results became garbage. Make
952 copies while it is still usable.
954 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
955 on delivery deferred (==) and failed (**) lines (if a delivery was
956 attemtped). Previously it was only on completion (=>) lines.
958 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
959 for the expansion of the server_scram_iter and server_scram_salt options.
961 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
962 are now specifically given a NO_DATA response without hitting the system
963 resolver. The library goes on to do the now-standard TXT lookup.
964 Use of dnsdb lookups is not affected.
966 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
967 only retrieve the errormessage once. Previously two calls to dlerror()
968 were used, and the second one (for mainlog/paniclog) retrieved null
971 JH/20 Taint checking: disallow use of tainted data for
972 - the appendfile transport file and directory options
973 - the pipe transport command
974 - the autoreply transport file, log and once options
975 - file names used by the redirect router (including filter files)
977 - paths used by single-key lookups
978 Previously this was permitted.
980 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
981 adjusted the size of a major service buffer; this failed because the
982 buffer was in use at the time. Change to a compile-time increase in the
983 buffer size, when this authenticator is compiled into exim.
985 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
986 previous fast-mode was untenable in the face of glibs using mmap to
987 support larger malloc requests.
989 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
990 New values supported, if defined on system where compiled:
991 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
992 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
994 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
995 running a limited number of proceses in parallel, a benefit is gained. The
996 amount varies with the platform hardware and load. The use of the option
997 queue_run_in_order means we cannot do this, as ordering becomes
1000 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
1001 had introduced a string-copy (for ensuring NUL-termination) which was not
1002 appropriate for that case, which can include embedded NUL bytes in the
1003 block of data. Investigation showed the copy to actually be needless, the
1004 data being length-specified.
1006 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
1007 done during a receiving connection, and both used TLS, global info was
1008 used rather than per-connection info for tracking the state of data
1009 queued for transmission. This could result in a connection hang.
1011 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1012 Previously, when delivering serveral messages down a single connection
1013 only the first would provide a SIZE. This was due to the size information
1014 not being properly tracked.
1016 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1017 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1018 expansion and logging. Previously, spurious values such as a future
1019 minute could be seen.
1021 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1022 it could crash from a null-deref. This could also affect the
1023 ${addresses: } operator and ${readsock } item.
1025 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1026 message following a mime one, the variable was not reset.
1028 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1029 cached capability (perhaps the peer reneged?) and immediately retry in
1032 JH/31 Fix spurious detection of timeout while writing to transport filter.
1034 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1035 an attempt to copy the string was made before checking it.
1037 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1038 taint of the lookup key was maintained; we now regard the presence in the
1039 filesystem as sufficient validation.
1041 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1042 argument is supplied.
1044 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1045 Previously this was not checked, and nonempty relative paths made an
1046 access under Exim's current working directory.
1048 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1049 Previously no event was raised.
1051 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1052 parameter supplied by the sender MAIL FROM command. Previously it was
1053 ignored, and only the check_spool_space option value for the required
1056 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1057 the size of the signing public-key. Previously it was instead giving
1058 the size of the signature hash.
1060 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1061 the default. See the (new) dkim_verify_min_keysizes option.
1063 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1064 and an ACL use a lookup for checking either the local_part or domain,
1065 stale data could be accessed. Ensure that variable references are
1066 dropped between messages.
1068 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1069 by the client was not checked as pointing within response data before
1070 being used. A malicious client could thus cause an out-of-bounds read and
1071 possibly gain authentication. Fix by adding the check.
1073 JH/42 Internationalisation: change the default for downconversion in the smtp
1074 transport to be "if needed". Previously it was "as previously set" for
1075 the message, which usually meant "if needed" for message-submission but
1076 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1077 even when the envelope addresses did not need it, resulting in forwarding
1078 failures to non-supporting MTAs. A downconvert in such cases will be
1079 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1080 transport. The change does mean that addresses needing conversion will
1081 be converted when previously a delivery failure would occur.
1083 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1084 response was received it would be used unchecked in a fail-DSN, violating
1085 standards on line-length limits. Truncate if needed.
1087 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1088 doesn't work. (Additionally add a new main config option to configure the
1095 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1096 side, to decode a TLS 1.3 packet capture.
1098 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1099 Previously the default library behaviour applied, sending two, each in
1100 its own TCP segment.
1102 JH/03 Debug output for ACL now gives the config file name and line number for
1105 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1107 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1109 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1110 buffer overrun for (non-chunking) other transports.
1112 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1113 TLS1.3, means that a server rejecting a client certificate is not visible
1114 to the client until the first read of encrypted data (typically the
1115 response to EHLO). Add detection for that case and treat it as a failed
1116 TLS connection attempt, so that the normal retry-in-clear can work (if
1117 suitably configured).
1119 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1120 and/or domain. Found and fixed by Jason Betts.
1122 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1123 configuration). If a CNAME target was not a wellformed name pattern, a
1126 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1127 the OS reports them interleaved with other addresses.
1129 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1130 used both for input and for a verify callout, both encrypted, SMTP
1131 responses being sent by the server could be lost. This resulted in
1132 dropped connections and sometimes bounces generated by a peer sending
1135 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1136 string. Previously it was possible to cause undefined behaviour in a
1137 library routine (usually a crash). Found by "zerons".
1139 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1142 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1143 API was removed, so update to use the newer ones.
1145 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1146 any timeout set, is taking a long time. Previously we would hang on to a
1147 rotated logfile "forever" if the input was arriving with long gaps
1148 (a previous attempt to fix addressed lack, for a long time, of initial
1151 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1152 shared (NFS) environment. The length of the tempfile name is now
1153 4 + 16 ("hdr.$message_exim_id") which might break on file
1154 systems which restrict the file name length to lower values.
1155 (It was "hdr.$pid".)
1157 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1158 shared (NFS) environment.
1160 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1161 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1164 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1165 on some platforms for bit 31.
1167 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1168 to changes apparently associated with TLS1.3 handling some of the APIs
1169 previously used were either nonfunctional or inappropriate. Strings
1170 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1171 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1172 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1173 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1174 and the use of specific cipher names in the encrypted= ACL condition.
1176 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1178 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1179 verification result was not updated unless hosts_require_ocsp applied.
1181 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1182 queue_list_requires_admin set to false, non-admin users were denied the
1185 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1186 directory-of-certs mode. Previously they were advertised despite the
1189 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1190 A single TCP connection by a client will now hold a TLS connection open
1191 for multiple message deliveries, by default. Previously the default was to
1194 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1195 default. If built with the facility, DANE will be used. The facility
1196 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1198 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1199 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1200 must be defined and you must still, unless you define DISABLE_TLS, manage
1201 the the include-dir and library-file requirements that go with that
1202 choice. Non-TLS builds are still supported.
1204 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1207 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1208 default. If the platform supports and has the facility enabled, it will
1209 be requested on all coneections.
1211 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1212 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1214 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1216 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1217 success-DSN messages. Previously the From: header was always the default
1218 one for these; the option was ignored.
1220 JH/28 Fix the timeout on smtp response to apply to the whole response.
1221 Previously it was reset for every read, so a teergrubing peer sending
1222 single bytes within the time limit could extend the connection for a
1223 long time. Credit to Qualsys Security Advisory Team for the discovery.
1225 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1226 delivery address, which leaked information of the results of local
1227 forwarding. Change to the original envelope recipient address, per
1230 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1231 requested. Previously not bounce was generated and a log entry of
1232 error ignored was made.
1234 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1236 JH/32 Introduce a general tainting mechanism for values read from the input
1237 channel, and values derived from them. Refuse to expand any tainted
1238 values, to catch one form of exploit.
1240 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1241 was unused and the unexpanded text used for the test. Found and
1242 fixed by Ruben Jenster.
1244 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1245 an attempt to use a TLS library read routine dereffed a nul pointer,
1248 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1249 them in our smtp response.
1251 JH/36 Have the general router option retry_use_local_part default to true when
1252 any of the restrictive preconditions are set (to anything). Previously it
1253 was only for check_local user. The change removes one item of manual
1254 configuration which is required for proper retries when a remote router
1255 handles a subset of addresses for a domain.
1257 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1258 link count into consideration.
1260 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1261 caused the extension of big_buffer, the following lines were ignored.
1263 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1264 accordance with RFC 2308. Previously there was no expiry, so a longlived
1265 receive process (eg. due to ACL delays) versus a short SOA value could
1268 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1270 JH/39 Promote DMARC support to mainline.
1272 JH/40 Bug 2452: Add a References: header to DSNs.
1274 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1275 parameters. The relevant library call is documented as "Deprecated: This
1276 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1277 3.6.0, DH parameters are negotiated following RFC7919."
1279 HS/06 Change the default of dnssec_request_domains to "*"
1281 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1282 carried on and emitted a BDAT command, even when PIPELINING was not
1285 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1286 buffer was used for the filename, resulting in a trap when tainted
1287 arguments (eg. $domain) were used.
1289 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1290 recommended to avoid a possible server-load attack. The feature can be
1291 re-enabled via the openssl_options main cofiguration option.
1293 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1294 for version 4.90 - adding a "more data" boolean to the arguments.
1295 Bumped the ABI version number also, this having been missed previously;
1296 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1297 respect of usage of smtp_printf() by either local_scan code or libraries
1298 accessed via the ${dlfunc } expansion item. Both will need coding
1299 adjustment for any calls to smtp_printf() to match the new function
1300 signature; a FALSE value for the new argument is always safe.
1302 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1303 the file-offset (which the Linux syscall does, and exim expects); this
1304 resulted in an indefinite loop.
1306 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1307 to do ARC verification. The Authentication-Results: header line added
1308 by the configuration then had no ARC item.
1310 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1311 an incorrect mode was used for reading the result, resulting in it being
1318 JH/01 Remove code calling the customisable local_scan function, unless a new
1319 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1321 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1322 non-signal-safe functions being used.
1324 JH/03 Bug 2269: When presented with a received message having a stupidly large
1325 number of DKIM-Signature headers, disable DKIM verification to avoid
1326 a resource-consumption attack. The limit is set at twenty.
1328 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1329 report of oldest_pass in ${authres } in consequence, and separate out
1330 some descriptions of reasons for verification fail.
1332 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1333 files in the spool were present and unlocked. A queue-runner could spot
1334 them, resulting in a duplicate delivery. Fix that by doing the unlock
1335 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1336 add more error-checking on spoolfile handling while that code is being
1339 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1340 No known attacks, no CVE, this is defensive hardening.
1342 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1343 a queue-runner could start a delivery while other operations were ongoing.
1344 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1345 Found and investigated by Tim Stewart. Fix by using the open message data
1346 file handle rather than opening another, and not locally closing it (which
1347 releases a lock) for that case, while creating the temporary .eml format
1348 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1350 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1351 $sender_verify_failure/$recipient_verify_failure to "random".
1353 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1356 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1357 Previously this would segfault.
1359 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1362 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1363 like zero, since the resolver should be doing this for us, But we need one
1364 as a CNAME but no MX presence gets the CNAME returned; we need to check
1365 that doesn't point to an MX to declare it "no MX returned" rather than
1366 "error, loop". A new main option is added so the older capability of
1367 following some limited number of chain links is maintained.
1369 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1371 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1372 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1373 now-deprecated earlier definitions used only specified the range up to TLS
1374 1.2 (in the older-version library docs).
1376 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1378 JH/15 Rework TLS client-side context management. Stop using a global, and
1379 explicitly pass a context around. This enables future use of TLS for
1380 connections to service-daemons (eg. malware scanning) while a client smtp
1381 connection is using TLS; with cutthrough connections this is quite likely.
1383 JH/16 Fix ARC verification to do AS checks in reverse order.
1385 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1387 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1388 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1389 Previously the "utf8" would be re-prepended for every additional message.
1391 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1392 Previously thery were accepted, resulting in issues when attempting to
1393 forward messages to a non-supporting MTA.
1395 PP/02 Let -n work with printing macros too, not just options.
1397 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1398 one parent address was copied, and bogus data was used at delivery-logging
1399 time. Either a crash (after delivery) or bogus log data could result.
1400 Discovery and analysis by Tim Stewart.
1402 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1403 Previously if the string ended mid-character, we did not insert the
1404 promised '?' replacement.
1406 PP/04 Documentation: current string operators work on bytes, not codepoints.
1408 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1409 should pack well giving a smaller memory footprint so better caching and
1410 therefore performance. Group the declarations where this can't be done so
1411 that the byte-sized flag variables are not interspersed among pointer
1412 variables, giving a better chance of good packing by the compiler.
1414 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1415 non-null, to avoid issues with sites running BATV. Previously reports were
1416 sent with an empty envelope sender so looked like bounces.
1418 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1419 The ignore_error flag wasn't being returned from the filter subprocess so
1420 was not set for later routers. Investigation and fix by Matthias Kurz.
1422 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1423 and a msg:complete for the whole, when a message is manually removed using
1424 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1426 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1427 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1428 hope that is portable enough.
1430 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1431 requiring a known-CA anchor certificate; make it now rely entirely on the
1432 TLSA as an anchor. Checking the name on the leaf cert against the name
1433 on the A-record for the host is still done for TA (but not for EE mode).
1435 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1436 included in delivery lines for non-proxied connections, when compiled with
1437 SUPPORT_SOCKS and running with proxy logging enabled.
1439 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1440 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1441 move the existing event to fire before the normal logging of message
1442 failure so that custom logging is bracketed by normal logging.
1444 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1445 msg:fail:internal event. Developement by Matthias Kurz.
1447 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1448 far too small for todays use of crypto signatures stored there. Go all
1449 the way to the max DNS message size of 64kB, even though this might be
1450 overmuch for IOT constrained device use.
1452 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1453 copy a string over itself. The library routine is documented as not
1454 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1456 JH/32 For main options check_spool_space and check_inode_space, where the
1457 platform supports 64b integers, support more than the previous 2^31 kB
1458 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1459 the previous G, M, k.
1461 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1462 $authenticated_fail_id variable on authentication failure. Previously
1465 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1466 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1467 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1468 GNUTLS_SEC_PARAM_MEDIUM.
1470 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1471 side. Previously we would continue as if no SNI had been received.
1473 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1474 "<" character, which should be a list-separator specification, we walked
1475 off past the nul-terimation.
1477 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1478 causes) even when the retry time is not yet met. Previously they were
1479 not, meaning that when (say) an account was over-quota and temp-rejecting,
1480 and multiple senders' messages were queued, only one sender would get
1481 notified on each configured delay_warning cycle.
1483 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1485 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1486 cipher-suites, an error can be left on the stack even for a succeeding
1487 accept; this results in impossible error messages when a later operation
1490 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1491 return error codes indicating retry. Under TLS1.3 this becomes required.
1493 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1494 it only wrote the new authenticators, resulting in a lack of tracking of
1495 peer changes of ESMTP extensions until the next cache flush.
1497 JH/41 Fix the loop reading a message header line to check for integer overflow,
1498 and more-often against header_maxsize. Previously a crafted message could
1499 induce a crash of the recive process; now the message is cleanly rejected.
1501 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1502 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1508 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1509 When redis_servers is set to a list of > 1 element, and the Redis servers
1510 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1511 case of MOVED into a DEFER case instead, thus moving the query onto the
1512 next server in the list. For a cluster of N elements, all N servers must
1513 be defined in redis_servers.
1515 GF/02 Catch and remove uninitialized value warning in exiqsumm
1516 Check for existence of @ARGV before looking at $ARGV[0]
1518 JH/01 Replace the store_release() internal interface with store_newblock(),
1519 which internalises the check required to safely use the old one, plus
1520 the allocate and data copy operations duplicated in both (!) of the
1521 extant use locations.
1523 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1524 modifier. This matches the restriction on the commandline.
1526 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1527 Previously only the last row was returned.
1529 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1530 we assumed that tags in the header were well-formed, and parsed the
1531 element content after inspecting only the first char of the tag.
1532 Assumptions at that stage could crash the receive process on malformed
1535 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1536 While running the DKIM ACL we operate on the Permanent memory pool so that
1537 variables created with "set" persist to the DATA ACL. Also (at any time)
1538 DNS lookups that fail create cache records using the Permanent pool. But
1539 expansions release any allocations made on the current pool - so a dnsdb
1540 lookup expansion done in the DKIM ACL releases the memory used for the
1541 DNS negative-cache, and bad things result. Solution is to switch to the
1542 Main pool for expansions.
1543 While we're in that code, add checks on the DNS cache during store_reset,
1544 active in the testsuite.
1545 Problem spotted, and debugging aided, by Wolfgang Breyha.
1547 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1548 When none of the hosts presented to a transport match an already-open
1549 connection, close it and proceed with the list. Previously we would
1550 queue the message. Spotted by Lena with Yahoo, probably involving
1553 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1554 Previously a spurious "250 OK id=" response was appended to the proper
1557 JH/08 The "support for" informational output now, which built with Content
1558 Scanning support, has a line for the malware scanner interfaces compiled
1559 in. Interface can be individually included or not at build time.
1561 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1562 by the template makefile "src/EDITME". The "STREAM" support for an older
1563 ClamAV interface method is removed.
1565 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1566 rows affected is given instead).
1568 JH/11 The runtime Berkeley DB library version is now additionally output by
1569 "exim -d -bV". Previously only the compile-time version was shown.
1571 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1572 SMTP connection. Previously, when one had more recipients than the
1573 first, an abortive onward connection was made. Move to full support for
1574 multiple onward connections in sequence, handling cutthrough connection
1575 for all multi-message initiating connections.
1577 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1578 routers. Previously, a multi-recipient message would fail to match the
1579 onward-connection opened for the first recipient, and cause its closure.
1581 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1582 a timeout on read on a GnuTLS initiating connection, resulting in the
1583 initiating connection being dropped. This mattered most when the callout
1584 was marked defer_ok. Fix to keep the two timeout-detection methods
1587 JH/15 Relax results from ACL control request to enable cutthrough, in
1588 unsupported situations, from error to silently (except under debug)
1589 ignoring. This covers use with PRDR, frozen messages, queue-only and
1592 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1594 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1595 metadata, resulting in a crash in free().
1597 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1598 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1599 Broken also in d185889f4, with init system revamp.
1601 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1602 Previously we abruptly closed the connection after reading a malware-
1603 found indication; now we go on to read the "scan ok" response line,
1606 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1607 ACL. Previously, a crash would result.
1609 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1610 macro text after a replacement (previously it was only once per line) and
1611 by skipping builtin macros when searching for an uppercase lead character.
1613 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1614 for the build is renamed.
1616 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1617 was allocated for every new TLS startup, meaning one per message. Fix
1618 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1620 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1621 reported the original. Fix to report (as far as possible) the ACL
1622 result replacing the original.
1624 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1625 OpenSSL. Certificate information is loaded for every new TLS startup,
1626 and the resources needed to be freed.
1628 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1630 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1633 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1634 DATA response info to the (existing) per-recipient response info for
1635 the "C=" log element. It can have useful tracking info from the
1636 destination system. Patch from Simon Arlott.
1638 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1639 length value. Previously this would segfault.
1641 HS/02 Support Avast multiline protoocol, this allows passing flags to
1642 newer versions of the scanner.
1644 JH/28 Ensure that variables possibly set during message acceptance are marked
1645 dead before release of memory in the daemon loop. This stops complaints
1646 about them when the debug_store option is enabled. Discovered specifically
1647 for sender_rate_period, but applies to a whole set of variables.
1648 Do the same for the queue-runner and queue-list loops, for variables set
1649 from spool message files. Do the same for the SMTP per-message loop, for
1650 certain variables indirectly set in ACL operations.
1652 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1653 as a multi-recipient message from a mailinglist manager). The coding had
1654 an arbitrary cutoff number of characters while checking for more input;
1655 enforced by writing a NUL into the buffer. This corrupted long / fast
1656 input. The problem was exposed more widely when more pipelineing of SMTP
1657 responses was introduced, and one Exim system was feeding another.
1658 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1659 receiving system, and refused recipients seen by the sending system
1660 (propating to people being dropped from mailing lists).
1661 Discovered and pinpointed by David Carter.
1663 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1664 replaced by the ${authresults } expansion.
1666 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1668 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1669 allows proper process termination in container environments.
1671 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1672 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1674 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1675 and "err_perm", deprecated since 4.83 when the RFC-defined words
1676 "temperror" and "permerror" were introduced.
1678 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1679 transport-filters or DKIM-signing. The restriction was lost in the
1680 consolidation of verify-callout and delivery SMTP handling.
1681 Extend the restriction to also cover ARC-signing.
1683 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1684 in defer=pass mode supply a 450 to the initiator. Previously the message
1687 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1688 tls_require_ciphers is used as before.
1690 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1691 "pass_unscanned". Only tmpfails from the scanner are written to
1692 the paniclog, as they may require admin intervention (permission
1693 denied, license issues). Other scanner errors (like decompression
1694 bombs) do not cause a paniclog entry.
1696 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1697 Previously it was possible to log spurious information in receive log
1700 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1701 triggered odd behaviour from Outlook Express clients.
1703 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1706 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1707 since the IETF WG has not yet settled on that versus the original
1708 "bare" representation.
1710 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1711 Previously the millisecond value corrupted the output.
1712 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1713 corrupted the output.
1719 JH/01 Rework error string handling in TLS interface so that the caller in
1720 more cases is responsible for logging. This permits library-sourced
1721 string to be attached to addresses during delivery, and collapses
1722 pairs of long lines into single ones.
1724 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1725 during configuration. Wildcards are allowed and expanded.
1727 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1728 This permits better logging.
1730 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1731 do not close it down and have the child transport start it up again on
1732 the passed-on TCP connection. Instead, proxy the child (and any
1733 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1734 affected: the continued delivery log lines do not have any DNSSEC, TLS
1735 Certificate or OCSP information. TLS cipher information is still logged.
1737 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1738 identical IP addresses on different listening ports. Will also affect
1741 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1742 add noisy ifdef guards to special-case this sillyness.
1743 Patch from Bernd Kuhls.
1745 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1746 than 255 are no longer allowed.
1748 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1749 Disable the session-cache too, which might reduce our load. Since we
1750 currrectly use a new context for every connection, both as server and
1751 client, there is no benefit for these.
1752 GnuTLS appears to not support tickets server-side by default (we don't
1753 call gnutls_session_ticket_enable_server()) but client side is enabled
1754 by default on recent versions (3.1.3 +) unless the PFS priority string
1757 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1758 <https://reproducible-builds.org/specs/source-date-epoch/>.
1760 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1761 the check for any unsuccessful recipients did not notice the limit, and
1762 erroneously found still-pending ones.
1764 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1765 MSG_MORE. Only in-clear (not on TLS connections).
1767 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1768 transport-filter is involved we can buffer the headers in memory for
1769 creating the signature, and read the spool data file once for the
1770 signature and again for transmission.
1772 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1773 4.77 as the kernel support then wasn't solid, having issues in 64bit
1774 mode. Now, it's been long enough. Add support for FreeBSD also.
1776 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1777 case where the routing stage had gathered several addresses to send to
1778 a host before calling the transport for the first, we previously failed
1779 to close down TLS in the old transport process before passing the TCP
1780 connection to the new process. The new one sent a STARTTLS command
1781 which naturally failed, giving a failed delivery and bloating the retry
1782 database. Investigation and fix prototype from Wolfgang Breyha.
1784 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1785 false-negatives in the check that the sender had not preempted a response
1786 or prompt from Exim (running as a server), due to that code's lack of
1787 awareness of the SMTP input buffering.
1789 PP/04 Add commandline_checks_require_admin option.
1790 Exim drops privileges sanely, various checks such as -be aren't a
1791 security problem, as long as you trust local users with access to their
1792 own account. When invoked by services which pass untrusted data to
1793 Exim, this might be an issue. Set this option in main configuration
1794 AND make fixes to the calling application, such as using `--` to stop
1797 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1798 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1799 responses to those, into a single TLS record each way (this usually means
1800 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1803 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1804 affects you only if you're dancing at the edge of the param size limits.
1805 If you are, and this message makes sense to you, then: raise the
1806 configured limit or use OpenSSL 1.1. Nothing we can do for older
1809 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1810 cmdline element to get the documented default one. Previously it was
1813 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1814 are unsuable for non-message-specific reasons - eg. connection timeout,
1815 banner-time rejection.
1817 JH/16 Fix logging of delivery remote port, when specified by router, under
1820 PP/06 Repair manualroute's ability to take options in any order, even if one
1821 is the name of a transport.
1824 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1826 JH/17 Change the list-building routines interface to use the expanding-string
1827 triplet model, for better allocation and copying behaviour.
1829 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1830 Previously it was constructed the first time a possibly-matching string
1831 was met in the configuration file input during startup; now it is done
1834 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1835 compatible one, to avoid the (poorly documented) possibility of a config
1836 file in the working directory redirecting the DB files, possibly correpting
1837 some existing file. CVE-2017-10140 assigned for BDB.
1839 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1840 cache-hot. Previously, although the result was properly cached, the
1841 initial verify call returned a defer.
1843 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1844 the main verify for receipient in uncached-mode.
1846 JH/22 Retire historical build files to an "unsupported" subdir. These are
1847 defined as "ones for which we have no current evidence of testing".
1849 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1850 if present. Previously it was ignored.
1852 JH/24 Start using specified-initialisers in C structure init coding. This is
1853 a C99 feature (it's 2017, so now considered safe).
1855 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1856 if was a fixed-sized field and bitmask ops via macros; it is now more
1859 PP/07 GitHub PR 56: Apply MariaDB build fix.
1860 Patch provided by Jaroslav Škarvada.
1862 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1863 during Coverity cleanups [4.87 JH/47]
1864 Diagnosis and fix provided by Michael Fischer v. Mollard.
1866 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1867 the right size to place the terminating semicolon on its own folded
1868 line, the header hash was calculated to an incorrect value thanks to
1869 the (relaxed) space the fold became.
1871 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1872 and confused the parent.
1874 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1875 which could crash as a result. This could lead to undeliverable messages.
1877 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1880 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1881 matters on fast-turnover and PID-randomising systems, which were getting
1882 out-of-order delivery.
1884 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1885 a possibly-overlapping copy. The symptom was that "Remote host closed
1886 connection in response to HELO" was logged instead of the actual 4xx
1889 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1890 Previously only that bufferd was discarded, resulting in SYMTP command
1893 JH/32 DKIM: when a message has multiple signatures matching an identity given
1894 in dkim_verify_signers, run the dkim acl once for each. Previously only
1895 one run was done. Bug 2189.
1897 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1898 "panic the current process" to "deliberately defer". The panic log is
1899 still written with the problem list name; the mail and reject logs now
1900 get a temp-reject line for the message that was being handled, saying
1901 something like "domains check lookup or other defer". The SMTP 451
1902 message is still "Temporary local problem".
1904 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1905 A crafted sequence of BDAT commands could result in in-use memory beeing
1906 freed. CVE-2017-16943.
1908 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1909 from SMTP input. Previously it was always done; now only done for DATA
1910 and not BDAT commands. CVE-2017-16944.
1912 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1913 to the message (such as an overlong header line). Previously this was
1914 not done and we did not exit BDAT mode. Followon from the previous item
1915 though a different problem.
1921 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1922 than -2003 did; needs libidn2 in addition to libidn.
1924 JH/02 The path option on a pipe transport is now expanded before use.
1926 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1927 Patch provided by "Björn", documentation fix added too.
1929 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1930 missing a wire-to-host endian conversion.
1932 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1933 close after a BDAT command line could be taken as a following command,
1934 giving a synch failure. Fix by only checking for synch immediately
1935 before acknowledging the chunk.
1937 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1938 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1939 macro. Patches provided by Josh Soref.
1941 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1942 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1943 by IANA as a service extension. However, John Klensin suggests that we
1946 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1947 the dkim code may be unix-mode line endings rather than smtp wire-format
1948 CRLF, so prepend a CR to any bare LF.
1950 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1951 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1953 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1954 the first were themselves being wrongly included in the feed into dkim
1955 processing; with most chunk sizes in use this resulted in an incorrect
1956 body hash calculated value.
1958 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1959 DKIM signature block, for verification. Although advised against by
1960 standards it is specifically not ruled illegal.
1962 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1964 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1965 missing a body hash (the bh= tag).
1967 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1968 It seems that HAProxy sends the Proxy Protocol information in clear and
1969 only then does a TLS startup, so do the same.
1971 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1972 TCP connections (such as for Spamd) unless the daemon successfully set
1973 Fast Open mode on its listening sockets. This fixes breakage seen on
1974 too-old kernels or those not configured for Fast Open, at the cost of
1975 requiring both directions being enabled for TFO, and TFO never being used
1976 by non-daemon-related Exim processes.
1978 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1979 endings, at least on the first header line. Try to canonify any that get
1980 past that check, despite the cost.
1982 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1983 now limited to an arbitrary five deep, while parsing addresses with the
1984 strip_excess_angle_brackets option enabled.
1986 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1987 instead leave the unprompted TLS handshake in socket buffer for the
1988 TLS library to consume.
1990 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1992 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1994 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1995 region in one operation, for speed, and this leaves assigned pointers
1996 dangling. Add checks run only under the testsuite which checks all
1997 variables at a store-reset and panics on a dangling pointer; add code
1998 explicitly nulling out all the variables discovered. Fixes one known
1999 bug: a transport crash, where a dangling pointer for $sending_ip_address
2000 originally assigned in a verify callout, is re-used.
2002 PP/06 Drop '.' from @INC in various Perl scripts.
2004 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
2006 PP/08 Reduce a number of compilation warnings under clang; building with
2007 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2008 should be warning-free.
2010 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2012 HS/01 Fix portability problems introduced by PP/08 for platforms where
2013 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2015 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2016 chunk. This allows us to accept broken chunked messages. We need a more
2017 general solution here.
2019 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2020 already-broken messages in the queue.
2022 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2024 JH/19 Fix reference counting bug in routing-generated-address tracking.
2030 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2031 supports it and a size is available (ie. the sending peer gave us one).
2033 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2034 years of being deprecated). The replacements are the ACLs
2035 acl_smtp_mime and acl_not_smtp_mime.
2037 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2038 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2039 or even an in-clear connection were permitted. Now, if the host lookup
2040 was dnssec and dane was requested then the host is only used if the
2041 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2042 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2043 if one fails this test.
2044 This means that a poorly-configured remote DNS will make it incommunicado;
2045 but it protects against a DNS-interception attack on it.
2047 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2048 non-noisy when a race steals the message being considered.
2050 JH/05 If main configuration option tls_certificate is unset, generate a
2051 self-signed certificate for inbound TLS connections.
2053 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2054 in rewrites and routers.
2056 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2057 and logged a warning sing 4.83; now they are a configuration file error.
2059 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2060 (lacking @domain). Apply the same qualification processing as RCPT.
2062 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2064 JH/10 Support ${sha256:} applied to a string (as well as the previous
2067 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2068 a cutthrough deliver is pending, as we always want to make a connection.
2069 This also avoids re-routing the message when later placing the cutthrough
2070 connection after a verify cache hit.
2071 Do not update it with the verify result either.
2073 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2074 when routing results in more than one destination address.
2076 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2077 signing (which inhibits the cutthrough capability). Previously only
2078 the presence of an option was tested; now an expansion evaluating as
2079 empty is permissible (obviously it should depend only on data available
2080 when the cutthrough connection is made).
2082 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2083 the relevant preceding SMTP command did not note the pipelining mode.
2085 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2086 Previously they were not counted.
2088 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2089 as one having no matching records. Previously we deferred the message
2090 that needed the lookup.
2092 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2093 distinguished as "(=".
2095 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2096 for missing MX records. Previously it only worked for missing A records.
2098 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2100 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2101 after the data-go-ahead and data-ack. Patch from Jason Betts.
2103 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2104 even for a "none" policy. Patch from Tony Meyer.
2106 JH/22 Fix continued use of a connection for further deliveries. If a port was
2107 specified by a router, it must also match for the delivery to be
2110 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2111 When one of the recipients of a message was unsuitable for the connection
2112 (has no matching addresses), we lost track of needing to mark it
2113 deferred. As a result mail would be lost.
2115 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2117 JH/25 Decoding ACL controls is now done using a binary search; the source code
2118 takes up less space and should be simpler to maintain. Merge the ACL
2119 condition decode tables also, with similar effect.
2121 JH/26 Fix problem with one_time used on a redirect router which returned the
2122 parent address unchanged. A retry would see the parent address marked as
2123 delivered, so not attempt the (identical) child. As a result mail would
2126 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2127 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2128 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2131 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2132 Main config options check_{log,spool}_{inodes,space} are now
2133 100 inodes, 10MB unless set otherwise in the configuration.
2135 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2136 Previously it only applied to the main-section connection policy
2139 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2141 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2142 by me. Added RFC7919 DH primes as an alternative.
2144 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2145 are not in the system include path.
2147 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2148 GnuTLS, when a session startup failed (eg because the client disconnected)
2149 Exim did stdio operations after fclose. This was exposed by a recent
2150 change which nulled out the file handle after the fclose.
2152 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2153 signed directly by the cert-signing cert, rather than an intermediate
2154 OCSP-signing cert. This is the model used by LetsEncrypt.
2156 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2158 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2159 an incoming connection.
2161 HS/02 Bug 1802: Do not half-close the connection after sending a request
2164 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2165 fallback to "prime256v1".
2167 JH/34 SECURITY: Use proper copy of DATA command in error message.
2168 Could leak key material. Remotely exploitable. CVE-2016-9963.
2174 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2175 and 3.4.4 - once the server is enabled to respond to an OCSP request
2176 it does even when not requested, resulting in a stapling non-aware
2177 client dropping the TLS connection.
2179 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2180 support variable-length bit vectors. No functional change.
2182 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2183 The I= interface field on outgoing lines is now after the H= remote
2184 host field, same as incoming lines. There is a separate
2185 outgoing_interface log selector which allows you to disable the
2188 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2189 If not running log_selector +smtp_connection the mainlog would be held
2190 open indefinitely after a "too many connections" event, including to a
2191 deleted file after a log rotate. Leave the per net connection logging
2192 leaving it open for efficiency as that will be quickly detected by the
2193 check on the next write.
2195 HS/01 Bug 1671: Fix post transport crash.
2196 Processing the wait-<transport> messages could crash the delivery
2197 process if the message IDs didn't exist for some reason. When
2198 using 'split_spool_directory=yes' the construction of the spool
2199 file name failed already, exposing the same netto behaviour.
2201 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2202 mime_regex ACL conditions.
2204 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2205 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2206 to HELO, local diagnostic string.
2208 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2209 log line to debug. Even when configured with a tls authenticator many
2210 client connections are expected to not authenticate in this way, so
2211 an authenticate fail is not an error.
2213 HS/02 Add the Exim version string to the process info. This way exiwhat
2214 gives some more detail about the running daemon.
2216 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2217 matter for fast-change records such as DNSBLs.
2219 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2220 retry record, even if constant. There may be multiple transports with
2221 different interface settings and the retry behaviour needs to be kept
2224 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2226 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2228 JH/10 Bug 840: fix log_defer_output option of pipe transport
2230 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2231 hosts_randomize. This matters a lot when combined with mua_wrapper.
2233 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2234 ${quote_pgsql:<string>} operator.
2236 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2238 JH/14 Change header file name for freeradius-client. Relevant if compiling
2239 with Radius support; from the Gentoo tree and checked under Fedora.
2241 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2243 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2244 option transport_filter, meaning no filtering.
2246 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2248 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2249 defaults to "*" (all hosts). The variable is now available when not built
2250 with TLS, default unset, mainly to enable keeping the testsuite sane.
2251 If a server certificate is not supplied (via tls_certificate) an error is
2252 logged, and clients will find TLS connections fail on startup. Presumably
2253 they will retry in-clear.
2254 Packagers of Exim are strongly encouraged to create a server certificate
2255 at installation time.
2257 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2258 with the $config_file variable.
2260 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2261 in transport context, after the attempt, and per-recipient. The latter type
2262 is per host attempted. The event data is the error message, and the errno
2263 information encodes the lookup type (A vs. MX) used for the (first) host,
2264 and the trailing two digits of the smtp 4xx response.
2266 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2267 to write to mainlog (or rejectlog, paniclog) in the window between file
2268 creation and permissions/ownership being changed. Particularly affects
2269 installations where exicyclog is run as root, rather than exim user;
2270 result is that the running daemon panics and dies.
2272 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2274 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2275 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2276 "pri" and "weight". Note that the previous implicit priority given by the
2277 list order is no longer honoured.
2279 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2280 for DKIM processing.
2282 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2283 by defining SUPPORT_SOCKS.
2285 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2286 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2287 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2288 variables are renamed to proxy_{local,external}_{address,port}.
2290 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2291 for a build by defining SUPPORT_I18N
2293 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2294 of the query string, and make ${quote_redis:} do that quoting.
2296 JH/29 Move Events support from Experimental to mainline, enabled by default
2297 and removable for a build by defining DISABLE_EVENT.
2299 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2301 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2302 cached by the daemon.
2304 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2305 by defining LOOKUP_REDIS. The libhiredis library is required.
2307 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2308 keys are given for lookup.
2310 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2311 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2312 only supported when built with TLS support. The PolarSSL SHA routines
2313 are still used when the TLS library is too old for convenient support.
2315 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2316 openssl_options), for security. OpenSSL forces this from version 1.1.0
2317 server-side so match that on older versions.
2319 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2320 allocation for $value could be released as the expansion processing
2321 concluded, but leaving the global pointer active for it.
2323 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2324 and to use the domains and local_parts ACL conditions.
2326 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2327 incorrectly not doubled on cutthrough transmission, hence seen as a
2328 body-termination at the receiving system - resulting in truncated mails.
2329 Commonly the sender saw a TCP-level error, and retransmitted the message
2330 via the normal store-and-forward channel. This could result in duplicates
2331 received - but deduplicating mailstores were liable to retain only the
2332 initial truncated version.
2334 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2336 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2338 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2339 we're in there, support oversigning also; bug 1309.
2341 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2343 HS/04 Add support for keep_environment and add_environment options.
2345 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2346 either intentional arithmetic overflow during PRNG, or testing config-
2349 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2350 delivery resulted in actual delivery. Cancel cutthrough before DATA
2353 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2354 rejects a recipient: pass the reject to the originator.
2356 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2357 Many were false-positives and ignorable, but it's worth fixing the
2360 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2361 for the new environment-manipulation done at startup. Move the routines
2362 from being local to tls.c to being global via the os.c file.
2364 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2365 an extract embedded as result-arg for a map, the first arg for extract
2366 is unavailable so we cannot tell if this is a numbered or keyed
2367 extraction. Accept either.
2373 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2376 JH/02 The smtp transport option "multi_domain" is now expanded.
2378 JH/03 The smtp transport now requests PRDR by default, if the server offers
2381 JH/04 Certificate name checking on server certificates, when exim is a client,
2382 is now done by default. The transport option tls_verify_cert_hostnames
2383 can be used to disable this per-host. The build option
2384 EXPERIMENTAL_CERTNAMES is withdrawn.
2386 JH/05 The value of the tls_verify_certificates smtp transport and main options
2387 default to the word "system" to access the system default CA bundle.
2388 For GnuTLS, only version 3.0.20 or later.
2390 JH/06 Verification of the server certificate for a TLS connection is now tried
2391 (but not required) by default. The verification status is now logged by
2392 default, for both outbound TLS and client-certificate supplying inbound
2395 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2398 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2399 Status Notification (bounce) messages are now MIME format per RFC 3464.
2400 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2401 under the control of the dsn_advertise_hosts option, and routers may
2402 have a dsn_lasthop option.
2404 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2405 default, modifiable by a malware= option. The list separator for
2406 the options can now be changed in the usual way. Bug 68.
2408 JH/10 The smtp_receive_timeout main option is now expanded before use.
2410 JH/11 The incoming_interface log option now also enables logging of the
2411 local interface on delivery outgoing connections.
2413 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2414 if the interface and destination host and port all match.
2416 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2419 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2420 Patch from Andrew Lewis.
2422 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2423 now supports optional time-restrictions, weighting, and priority
2424 modifiers per server. Patch originally by <rommer@active.by>.
2426 JH/16 The spamd_address main option now supports a mixed list of local
2427 and remote servers. Remote servers can be IPv6 addresses, and
2428 specify a port-range.
2430 JH/17 Bug 68: The spamd_address main option now supports an optional
2431 timeout value per server.
2433 JH/18 Bug 1581: Router and transport options headers_add/remove can
2434 now have the list separator specified.
2436 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2439 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2442 JH/21 Support for the A6 type of dns record is withdrawn.
2444 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2445 rather than the verbs used.
2447 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2448 from 255 to 1024 chars.
2450 JH/24 Verification callouts now attempt to use TLS by default.
2452 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2453 are generic router options now. The defaults didn't change.
2455 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2456 Original patch from Alexander Shikoff, worked over by JH.
2458 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2459 files if ZCAT_COMMAND is not executable.
2461 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2463 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2465 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2466 Normally benign, it bites when the pair was led to by a CNAME;
2467 modern usage is to not canonicalize the domain to a CNAME target
2468 (and we were inconsistent anyway for A-only vs AAAA+A).
2470 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2472 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2473 when evaluating $sender_host_dnssec.
2475 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2476 $sender_helo_dnssec variable.
2478 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2480 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2482 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2484 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2485 documented as working, but never had. Support all but $spam_report.
2487 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2488 added for tls authenticator.
2490 HS/03 Add perl_taintmode main config option
2496 TL/01 When running the test suite, the README says that variables such as
2497 no_msglog_check are global and can be placed anywhere in a specific
2498 test's script, however it was observed that placement needed to be near
2499 the beginning for it to behave that way. Changed the runtest perl
2500 script to read through the entire script once to detect and set these
2501 variables, reset to the beginning of the script, and then run through
2502 the script parsing/test process like normal.
2504 TL/02 The BSD's have an arc4random API. One of the functions to induce
2505 adding randomness was arc4random_stir(), but it has been removed in
2506 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2507 function when detected.
2509 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2510 cause callback expansion.
2512 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2513 syntax errors in an expansion can be treated as a string instead of
2514 logging or causing an error, due to the internal use of bool_lax
2515 instead of bool when processing it.
2517 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2518 server certificates when making smtp deliveries.
2520 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2522 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2524 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2526 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2527 Merged patch from Sebastian Wiedenroth.
2529 JH/05 Fix results-pipe from transport process. Several recipients, combined
2530 with certificate use, exposed issues where response data items split
2531 over buffer boundaries were not parsed properly. This eventually
2532 resulted in duplicates being sent. This issue only became common enough
2533 to notice due to the introduction of connection certificate information,
2534 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2536 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2537 size buffer was used, resulting in syntax errors when an expansion
2540 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2541 version 3.3.6 or later.
2543 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2544 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2545 both become "event_action", the variables become $event_name, $event_data
2546 and $event_defer_errno. There is a new variable $verify_mode, usable in
2547 routers, transports and related events. The tls:cert event is now also
2548 raised for inbound connections, if the main configuration event_action
2551 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2552 early OCSP support, but no stapling (appears to be less than 1.0.0).
2554 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2555 server certificate names available under the smtp transport option
2556 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2559 JH/10 Time-related extraction expansions from certificates now use the main
2560 option "timezone" setting for output formatting, and are consistent
2561 between OpenSSL and GnuTLS compilations. Bug 1541.
2563 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2564 encoded parameter in the incoming message. Bug 1558.
2566 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2567 include certificate info, eximon was claiming there were spoolfile
2570 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2572 JH/14 Log delivery-related information more consistently, using the sequence
2573 "H=<name> [<ip>]" wherever possible.
2575 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2576 are problematic for Debian distribution, omit them from the release
2579 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2581 JH/16 Fix string representation of time values on 64bit time_t architectures.
2584 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2585 output list separator was used.
2590 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2591 checkers that were complaining about end of non-void function with no
2594 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2595 This was a regression introduced in 4.83 by another bugfix.
2597 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2599 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2600 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2606 TF/01 Correctly close the server side of TLS when forking for delivery.
2608 When a message was received over SMTP with TLS, Exim failed to clear up
2609 the incoming connection properly after forking off the child process to
2610 deliver the message. In some situations the subsequent outgoing
2611 delivery connection happened to have the same fd number as the incoming
2612 connection previously had. Exim would try to use TLS and fail, logging
2613 a "Bad file descriptor" error.
2615 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2616 utilities have not been installed.
2618 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2619 temporary space as the ACL may create new global variables.
2621 TL/01 LDAP support uses per connection or global context settings, depending
2622 upon the detected version of the libraries at build time.
2624 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2625 to extract and use the src ip:port in logging and expansions as if it
2626 were a direct connection from the outside internet. PPv2 support was
2627 updated based on HAProxy spec change in May 2014.
2629 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2631 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2632 Properly escape header and check for NULL return.
2634 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2637 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2639 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2640 characters in header names, implemented as a verify condition.
2641 Contributed by Michael Fischer v. Mollard.
2643 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2644 results permerror and temperror. Previous values are deprecated but
2645 still accepted. In a future release, err_perm and err_temp will be
2646 completely removed, which will be a backward incompatibility if the
2647 ACL tests for either of these two old results. Patch contributed by
2648 user bes-internal on the mailing list.
2650 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2652 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2653 selectors, in both main and reject logs.
2655 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2658 JH/07 Add malware type "sock" for talking to simple daemon.
2660 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2662 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2663 routers/transports under cutthrough routing.
2665 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2666 numbers. Touch up "bool" conditional to keep the same definition.
2668 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2670 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2672 JH/12 Expand items in router/transport headers_add or headers_remove lists
2673 individually rather than the list as a whole. Bug 1452.
2675 Required for reasonable handling of multiple headers_ options when
2676 they may be empty; requires that headers_remove items with embedded
2677 colons must have them doubled (or the list-separator changed).
2679 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2680 view the policy declared in the DMARC record. Currently, $dmarc_status
2681 is a combined value of both the record presence and the result of the
2684 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2686 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2687 dnslookup router and the smtp transport (applying to the forward
2690 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2691 of ldap servers used for a specific lookup. Patch provided by Heiko
2694 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2695 New variable $lookup_dnssec_authenticated for observability.
2697 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2698 Patch submitted by Lars Timman.
2700 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2702 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2703 Requires trusted mode and valid format message id, aborts otherwise.
2704 Patch contributed by Heiko Schlichting.
2706 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2707 certextract with support for various fields. Bug 1358.
2709 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2710 is requested by default, modifiable by smtp transport option
2713 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2714 operate on certificate variables to give certificate fingerprints
2715 Also new ${sha256:cert_variable}.
2717 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2719 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2720 Christian Aistleitner.
2722 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2724 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2725 file. Patch from Wolfgang Breyha.
2727 JH/25 Expand the coverage of the delivery $host and $host_address to
2728 client authenticators run in verify callout. Bug 1476.
2730 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2731 align with daemon_smtp_ports. Bug 72.
2733 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2734 support and error reporting did not work properly.
2736 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2737 and is readable. Patch from Andrew Colin Kissa.
2739 TL/14 Enhance documentation of ${run expansion and how it parses the
2740 commandline after expansion, particularly in the case when an
2741 unquoted variable expansion results in an empty value.
2743 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2745 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2746 by renaming away from it. Addresses GH issue 15, reported by
2749 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2751 TL/15 SECURITY: prevent double expansion in math comparison functions
2752 (can expand unsanitized data). Not remotely exploitable.
2759 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2761 PP/02 Make -n do something, by making it not do something.
2762 When combined with -bP, the name of an option is not output.
2764 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2767 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2768 $sender_host_name and config options to manage this, and basic check
2771 PP/05 DSCP support for outbound connections and control modifier for inbound.
2773 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2774 (Only plugin which currently uses this is kerberos4, which nobody should
2775 be using, but we should make it available and other future plugins might
2776 conceivably use it, even though it would break NAT; stuff *should* be
2777 using channel bindings instead).
2779 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2780 name; added for Sendmail compatibility; requires admin caller.
2781 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2782 just ignore it); requires trusted caller.
2783 Also parse but ignore: -Ac -Am -X<logfile>
2786 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2788 TL/02 Add +smtp_confirmation as a default logging option.
2790 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2791 Patch by Magnus Holmgren from 2007-02-20.
2793 TL/04 Bugzilla 1281 - Spec typo.
2794 Bugzilla 1283 - Spec typo.
2795 Bugzilla 1290 - Spec grammar fixes.
2797 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2799 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2801 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2802 mailing list by by Dmitry Isaikin.
2804 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2806 JH/02 Support "G" suffix to numbers in ${if comparisons.
2808 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2810 NM/01 Bugzilla 1197 - Spec typo
2811 Bugzilla 1196 - Spec examples corrections
2813 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2815 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2816 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2819 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2820 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2822 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2823 "acl {{name}{arg}...}", and optional args on acl condition
2826 JH/05 Permit multiple router/transport headers_add/remove lines.
2828 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2830 JH/07 Avoid using a waiting database for a single-message-only transport.
2831 Performance patch from Paul Fisher. Bugzilla 1262.
2833 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2836 JH/09 Add $headers_added variable, with content from use of ACL modifier
2837 add_header (but not yet added to the message). Bugzilla 199.
2839 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2840 Pulled from Bugzilla 817 by Wolfgang Breyha.
2842 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2844 (nb: this is the same fix as in Exim 4.80.1)
2846 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2849 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2852 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2854 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2855 advertise SMTP AUTH mechanism to us, instead of a generic
2856 protocol violation error. Also, make Exim more robust to bad
2857 data from the Dovecot auth socket.
2859 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2861 When a queue runner is handling a message, Exim first routes the
2862 recipient addresses, during which it prunes them based on the retry
2863 hints database. After that it attempts to deliver the message to
2864 any remaining recipients. It then updates the hints database using
2867 So if a recipient address works intermittently, it can get repeatedly
2868 deferred at routing time. The retry hints record remains fresh so the
2869 address never reaches the final cutoff time.
2871 This is a fairly common occurrence when a user is bumping up against
2872 their storage quota. Exim had some logic in its local delivery code
2873 to deal with this. However it did not apply to per-recipient defers
2874 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2876 This change adds a proper retry rule check during routing so that the
2877 final cutoff time is checked against the message's age. We only do
2878 this check if there is an address retry record and there is not a
2879 domain retry record; this implies that previous attempts to handle
2880 the address had the retry_use_local_parts option turned on. We use
2881 this as an approximation for the destination being like a local
2882 delivery, as in LMTP.
2884 I suspect this new check makes the old local delivery cutoff check
2885 redundant, but I have not verified this so I left the code in place.
2887 TF/02 Correct gecos expansion when From: is a prefix of the username.
2889 Test 0254 submits a message to Exim with the header
2893 When I ran the test suite under the user fanf2, Exim expanded
2894 the header to contain my full name, whereas it should have added
2895 a Resent-Sender: header. It erroneously treats any prefix of the
2896 username as equal to the username.
2898 This change corrects that bug.
2900 GF/01 DCC debug and logging tidyup
2901 Error conditions log to paniclog rather than rejectlog.
2902 Debug lines prefixed by "DCC: " to remove any ambiguity.
2904 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2906 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2907 Bug spotted by Jeremy Harris; was flawed since initial commit.
2908 Would have resulted in OCSP responses post-SNI triggering an Exim
2909 NULL dereference and crash.
2911 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2913 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2914 Bug detection, analysis and fix by Samuel Thibault.
2915 Bugzilla 1331, Debian bug #698092.
2917 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2919 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2920 Server implementation by Todd Lyons, client by JH.
2921 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2922 config variable "prdr_enable" controls whether the server
2923 advertises the facility. If the client requests PRDR a new
2924 acl_data_smtp_prdr ACL is called once for each recipient, after
2925 the body content is received and before the acl_smtp_data ACL.
2926 The client is controlled by both of: a hosts_try_prdr option
2927 on the smtp transport, and the server advertisement.
2928 Default client logging of deliveries and rejections involving
2929 PRDR are flagged with the string "PRDR".
2931 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2932 fclose(). Diagnosis by Todd Lyons.
2934 PP/17 Update configure.default to handle IPv6 localhost better.
2935 Patch by Alain Williams (plus minor tweaks).
2938 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2939 This is now consistent with GnuTLS, and is now documented: the
2940 previous undocumented portable approach to treating the option as
2941 unset was to force an expansion failure. That still works, and
2942 an empty string is now equivalent.
2944 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2945 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2946 not performing validation itself.
2948 PP/20 Added force_command boolean option to pipe transport.
2949 Patch from Nick Koston, of cPanel Inc.
2951 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2954 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2956 PP/21 Fix eximon continuous updating with timestamped log-files.
2957 Broken in a format-string cleanup in 4.80, missed when I repaired the
2958 other false fix of the same issue.
2959 Report and fix from Heiko Schlichting.
2962 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2963 Report from Prashanth Katuri.
2965 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2966 It's SecureTransport, so affects any MacOS clients which use the
2967 system-integrated TLS libraries, including email clients.
2969 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2970 using a MIME ACL for non-SMTP local injection.
2971 Report and assistance in diagnosis by Warren Baker.
2973 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2975 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2977 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2978 last id that failed so it may be referenced in subsequent ACL's.
2980 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2983 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2984 ldap library initialization, allowing self-signed CA's to be
2985 used. Also properly sets require_cert option later in code by
2986 using NULL (global ldap config) instead of ldap handle (per
2987 session). Bug diagnosis and testing by alxgomz.
2989 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2990 the src/util/ subdirectory.
2992 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2993 renamed to Transport Post Delivery Action by Jeremy Harris, as
2996 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2997 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2998 redis_servers = needs to be configured which will be used by the redis
2999 lookup. Patch from Warren Baker, of The Packet Hub.
3001 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
3003 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
3004 hostname or reverse DNS when processing a host list. Used suggestions
3005 from multiple comments on this bug.
3007 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3009 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3010 Missed a few lines, added it to make the runtest require no keyboard
3013 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3014 contains upper case chars. Make router use caseful_local_part.
3016 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3017 support when GnuTLS has been built with p11-kit.
3023 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3025 This, or similar/improved, will also be change PP/11 of 4.82.
3031 PP/01 Handle short writes when writing local log-files.
3032 In practice, only affects FreeBSD (8 onwards).
3033 Bugzilla 1053, with thanks to Dmitry Isaikin.
3035 NM/01 Bugzilla 949 - Documentation tweak
3037 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3040 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3042 PP/02 Implemented gsasl authenticator.
3044 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3046 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3047 `pkg-config foo` for cflags/libs.
3049 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3050 with rest of GSASL and with heimdal_gssapi.
3052 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3053 `pkg-config foo` for cflags/libs for the TLS implementation.
3055 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3056 properties get this fed in as external SSF. A number of robustness
3057 and debugging improvements to the cyrus_sasl authenticator.
3059 PP/08 cyrus_sasl server now expands the server_realm option.
3061 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3062 Patch by Jeremy Harris.
3064 PP/10 Added dbmjz lookup type.
3066 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3068 PP/12 MAIL args handles TAB as well as SP, for better interop with
3069 non-compliant senders.
3070 Analysis and variant patch by Todd Lyons.
3072 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3073 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3074 Patch from Dirk Mueller <dmueller@suse.com>
3076 PP/13 tls_peerdn now print-escaped for spool files.
3077 Observed some $tls_peerdn in wild which contained \n, which resulted
3078 in spool file corruption.
3080 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3081 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3082 or write after TLS renegotiation, which otherwise led to messages
3085 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3086 as a tracking header (ie: a signed header comes before the signature).
3087 Patch from Wolfgang Breyha.
3089 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3090 comma-sep list; embedded commas doubled.
3092 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3094 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3096 Report and patch from Dmitry Banschikov.
3098 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3099 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3100 failures. We appear to now support TLS1.1+ with Exim.
3102 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3103 lets Exim select keys and certificates based upon TLS SNI from client.
3104 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3105 before an outbound SMTP session. New log_selector, +tls_sni.
3107 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3108 NULL dereference. Report and patch from Alun Jones.
3110 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3111 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3112 Not seeing resolver debug output on NetBSD, but suspect this is a
3113 resolver implementation change.
3115 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3116 Left warnings. Added "eximon gdb" invocation mode.
3118 PP/21 Defaulting "accept_8bitmime" to true, not false.
3120 PP/22 Added -bw for inetd wait mode support.
3122 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3123 locate the relevant includes and libraries. Made this the default.
3125 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3126 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3128 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3129 This may cause build issues on older platforms.
3131 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3132 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3133 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3134 Added SNI support via GnuTLS too.
3135 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3137 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3139 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3140 Applied second patch from Janne, implementing suggestion to default
3141 multiple-strings-in-record handling to match SPF spec.
3143 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3145 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3146 read-only, out of scope).
3147 Patch from Wolfgang Breyha, report from Stuart Northfield.
3149 PP/29 Fix three issues highlighted by clang analyser static analysis.
3150 Only crash-plausible issue would require the Cambridge-specific
3151 iplookup router and a misconfiguration.
3152 Report from Marcin Mirosław.
3154 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3156 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3157 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3158 As part of this, removing so much warning spew let me fix some minor
3159 real issues in debug logging.
3161 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3162 assignment on my part. Fixed.
3164 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3165 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3166 Janne Snabb (who went above and beyond: thank you).
3168 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3169 string otherwise requires a connection and a bunch more work and it's
3170 relatively easy to get wrong. Should also expose TLS library linkage
3173 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3174 64-bit ${eval} (JH/03).
3176 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3177 GNU libc to support some of the 64-bit stuff, should not lead to
3178 conflicts. Defined before os.h is pulled in, so if a given platform
3179 needs to override this, it can.
3181 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3182 protection layer was required, which is not implemented.
3183 Bugzilla 1254, patch from Wolfgang Breyha.
3185 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3186 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3187 tls_dhparam take prime identifiers. Also unbreak combination of
3188 OpenSSL+DH_params+TLSSNI.
3190 PP/39 Disable SSLv2 by default in OpenSSL support.
3196 PP/01 Solaris build fix for Oracle's LDAP libraries.
3197 Bugzilla 1109, patch from Stephen Usher.
3199 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3201 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3204 TF/02 Fix a couple more cases where we did not log the error message
3205 when unlink() failed. See also change 4.74-TF/03.
3207 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3208 lock up or crash if it happened to be inside a call to libc when it
3209 got a SIGUSR1 from exiwhat.
3211 The SIGUSR1 handler appends the current process status to the process
3212 log which is later printed by exiwhat. It used to use the general
3213 purpose logging code to do this, but several functions it calls are
3214 not safe for signals.
3216 The new output code in the SIGUSR1 handler is specific to the process
3217 log, and simple enough that it's easy to inspect for signal safety.
3218 Removing some special cases also simplifies the general logging code.
3219 Removing the spurious timestamps from the process log simplifies
3222 TF/04 Improved ratelimit ACL condition.
3224 The /noupdate option has been deprecated in favour of /readonly which
3225 has clearer semantics. The /leaky, /strict, and /readonly update modes
3226 are mutually exclusive. The update mode is no longer included in the
3227 database key; it just determines when the database is updated. (This
3228 means that when you upgrade Exim will forget old rate measurements.)
3230 Exim now checks that the per_* options are used with an update mode that
3231 makes sense for the current ACL. For example, when Exim is processing a
3232 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3233 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3234 must specify per_mail/readonly. If you omit the update mode it defaults to
3235 /leaky where that makes sense (as before) or /readonly where required.
3237 The /noupdate option is now undocumented but still supported for
3238 backwards compatibility. It is equivalent to /readonly except that in
3239 ACLs where /readonly is required you may specify /leaky/noupdate or
3240 /strict/noupdate which are treated the same as /readonly.
3242 A useful new feature is the /count= option. This is a generalization
3243 of the per_byte option, so that you can measure the throughput of other
3244 aggregate values. For example, the per_byte option is now equivalent
3245 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3247 The per_rcpt option has been generalized using the /count= mechanism
3248 (though it's more complicated than the per_byte equivalence). When it is
3249 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3250 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3251 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3252 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3253 Note that using per_rcpt with a non-readonly update mode in more than
3254 one ACL will cause the recipients to be double-counted. (The per_mail
3255 and per_byte options don't have this problem.)
3257 The handling of very low rates has changed slightly. If the computed rate
3258 is less than the event's count (usually one) then this event is the first
3259 after a long gap. In this case the rate is set to the same as this event's
3260 count, so that the first message of a spam run is counted properly.
3262 The major new feature is a mechanism for counting the rate of unique
3263 events. The new per_addr option counts the number of different
3264 recipients that someone has sent messages to in the last time period. It
3265 behaves like per_rcpt if all the recipient addresses are different, but
3266 duplicate recipient addresses do not increase the measured rate. Like
3267 the /count= option this is a general mechanism, so the per_addr option
3268 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3269 example, measure the rate that a client uses different sender addresses
3270 with the options per_mail/unique=$sender_address. There are further
3271 details in the main documentation.
3273 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3275 TF/06 Removed a few PCRE remnants.
3277 TF/07 Automatically extract Exim's version number from tags in the git
3278 repository when doing development or release builds.
3280 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3281 Bugzilla 879. Patch from Paul Fisher.
3283 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3284 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3287 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3289 PP/05 Variable $av_failed, true if the AV scanner deferred.
3290 Bugzilla 1078. Patch from John Horne.
3292 PP/06 Stop make process more reliably on build failure.
3293 Bugzilla 1087. Patch from Heiko Schlittermann.
3295 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3296 Bugzilla 1089. Patch from Heiko Schlittermann.
3298 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3299 Bugzilla 1131. Patch from Holger Weiß.
3301 PP/09 Handle IPv6 addresses with SPF.
3302 Bugzilla 860. Patch from Wolfgang Breyha.
3304 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3306 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3309 PP/11 match_* no longer expand right-hand-side by default.
3310 New compile-time build option, EXPAND_LISTMATCH_RHS.
3311 New expansion conditions, "inlist", "inlisti".
3313 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3315 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3317 PP/14 fix log_write() format string regression from TF/03.
3318 Bugzilla 1152. Patch from Dmitry Isaikin.
3324 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3326 PP/02 Harmonised TLS library version reporting; only show if debugging.
3327 Layout now matches that introduced for other libraries in 4.74 PP/03.
3329 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3331 PP/04 New "dns_use_edns0" global option.
3333 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3336 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3337 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3339 TK/01 Updated PolarSSL code to 0.14.2.
3340 Bugzilla 1097. Patch from Andreas Metzler.
3342 PP/07 Catch divide-by-zero in ${eval:...}.
3343 Fixes bugzilla 1102.
3345 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3348 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3349 format-string attack -- SECURITY: remote arbitrary code execution.
3351 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3352 time unintentionally subject to list matching rules, letting the header
3353 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3354 arbitrary string expansion). This allowed for information disclosure.
3356 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3357 INT_MIN/-1 -- value coerced to INT_MAX.
3363 NM/01 Workaround for PCRE version dependency in version reporting
3366 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3367 This fixes portability to compilers other than gcc, notably
3368 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3370 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3371 makefiles for portability to HP-UX and POSIX correctness.
3373 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3374 Also via indented variable definition in the Makefile.
3375 (Debugging by Oliver Heesakkers).
3377 PP/02 Restore caching of spamd results with expanded spamd_address.
3378 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3380 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3381 Improves build reliability. Fix from: Frank Elsner
3383 NM/02 Fix wide character breakage in the rfc2047 coding
3384 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3386 NM/03 Allow underscore in dnslist lookups
3387 Fixes bug 1026. Patch from Graeme Fowler
3389 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3390 Code patches from Adam Ciarcinski of NetBSD.
3392 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3395 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3396 is logged, to avoid truncation. Patch from John Horne.
3398 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3399 Patch from Jakob Hirsch.
3401 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3402 SQL string expansion failure details.
3403 Patch from Andrey Oktyabrski.
3405 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3406 Patch from Simon Arlott.
3408 PP/09 New lookups functionality failed to compile on old gcc which rejects
3409 extern declarations in function scope.
3410 Patch from Oliver Fleischmann
3412 PP/10 Use sig_atomic_t for flags set from signal handlers.
3413 Check getgroups() return and improve debugging.
3414 Fixed developed for diagnosis in bug 927 (which turned out to be
3417 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3418 Patch from Mark Zealey.
3420 PP/12 Bugzilla 1056: Improved spamd server selection.
3421 Patch from Mark Zealey.
3423 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3424 Based on patch from Heiko Schlittermann.
3426 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3427 Patch from Uwe Doering, sign-off by Michael Haardt.
3429 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3430 variable declaration deep within a block. Bug and patch from
3433 PP/15 lookups-Makefile IRIX compatibility coercion.
3435 PP/16 Make DISABLE_DKIM build knob functional.
3437 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3438 Patch by Simon Arlott
3440 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3441 variable argument macros. Our copy now differs from upstream.
3447 TF/01 Failure to get a lock on a hints database can have serious
3448 consequences so log it to the panic log.
3450 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3451 controlled using the smtp_confirmation log selector.
3453 TF/03 Include the error message when we fail to unlink a spool file.
3455 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3456 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3457 for maintaining out-of-tree patches for some time.
3459 PP/01 Bugzilla 139: Documentation and portability issues.
3460 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3461 Handle per-OS dynamic-module compilation flags.
3463 PP/02 Let /dev/null have normal permissions.
3464 The 4.73 fixes were a little too stringent and complained about the
3465 permissions on /dev/null. Exempt it from some checks.
3466 Reported by Andreas M. Kirchwitz.
3468 PP/03 Report version information for many libraries, including
3469 Exim version information for dynamically loaded libraries. Created
3470 version.h, now support a version extension string for distributors
3471 who patch heavily. Dynamic module ABI change.
3473 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3474 privilege escalation vulnerability whereby the Exim run-time user
3475 can cause root to append content of the attacker's choosing to
3478 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3481 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3482 If dropping privileges for untrusted macros, we disabled normal logging
3483 on the basis that it would fail; for the Exim run-time user, this is not
3484 the case, and it resulted in successful deliveries going unlogged.
3485 Fixed. Reported by Andreas Metzler.
3491 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3492 only prepend for the Resent-* case. Fixes regression introduced in
3493 Exim 4.70 by NM/22 for Bugzilla 607.
3495 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3496 increasing numbers of administrators be bitten by this.
3498 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3500 PP/03 Bugzilla 994: added openssl_options main configuration option.
3502 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3504 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3506 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3508 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3509 without a peer certificate, leading to a segfault because of an
3510 assumption that peers always have certificates. Be a little more
3511 paranoid. Problem reported by Martin Tscholak.
3513 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3514 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3515 NB: ClamAV planning to remove STREAM in "middle of 2010".
3516 CL also introduces -bmalware, various -d+acl logging additions and
3517 more caution in buffer sizes.
3519 PP/09 Implemented reverse_ip expansion operator.
3521 PP/10 Bugzilla 937: provide a "debug" ACL control.
3523 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3525 PP/12 Bugzilla 973: Implement --version.
3527 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3529 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3531 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3533 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3534 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3535 ignore trailing whitespace.
3537 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3539 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3542 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3543 Notification from Dr Andrew Aitchison.
3545 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3546 ExtendedDetectionInfo response format.
3547 Notification from John Horne.
3549 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3552 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3553 XSL and documented dependency on system catalogs, with examples of how
3556 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3559 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3560 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3561 configuration file which is writeable by the Exim user or group.
3563 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3564 of configuration files to cover files specified with the -C option if
3565 they are going to be used with root privileges, not just the default
3568 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3569 option (effectively making it always true).
3571 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3572 files to be used while preserving root privileges.
3574 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3575 that rogue child processes cannot use them.
3577 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3578 run-time user, instead of root.
3580 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3581 Exim run-time user without dropping privileges.
3583 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3584 result string, instead of calling string_vformat() twice with the same
3587 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3588 for other users. Others should always drop root privileges if they use
3589 -C on the command line, even for a whitelisted configure file.
3591 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3593 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3599 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3600 $data_path, and $header_path variables; fixed documentation bugs and
3603 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3604 exipick to access non-standard spools, including the "frozen" queue
3607 NM/01 Bugzilla 965: Support mysql stored procedures.
3608 Patch from Alain Williams
3610 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3612 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3613 Patch from Andreas Metzler
3615 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3616 Patch from Kirill Miazine
3618 NM/05 Bugzilla 671: Added umask to procmail example.
3620 JJ/03 installed exipick 20100323.0, fixing doc bug
3622 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3623 directory. Notification and patch from Dan Rosenberg.
3625 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3627 TK/02 Improve log output when DKIM signing operation fails.
3629 MH/01 Treat the transport option dkim_domain as a colon separated
3630 list, not as a single string, and sign the message with each element,
3631 omitting multiple occurences of the same signer.
3633 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3634 Bugzilla 985, 986. Patch by Simon Arlott
3636 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3637 Patch by Simon Arlott
3639 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3640 MBX locking. Notification from Dan Rosenberg.
3646 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3648 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3650 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3652 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3654 NM/04 Bugzilla 915: Flag broken perl installation during build.
3660 TK/01 Added patch by Johannes Berg that expands the main option
3661 "spamd_address" if it starts with a dollar sign.
3663 TK/02 Write list of recipients to X-Envelope-Sender header when building
3664 the mbox-format spool file for content scanning (suggested by Jakob
3667 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3668 (http://www.dcc-servers.net/) support via dccifd. Activated by
3669 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3671 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3672 by Mark Daniel Reidel <mr@df.eu>.
3674 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3675 When building exim an external PCRE library is now needed -
3676 PCRE is a system library on the majority of modern systems.
3677 See entry on PCRE_LIBS in EDITME file.
3679 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3680 conversation. Added nologin parameter to request.
3681 Patch contributed by Kirill Miazine.
3683 TF/01 Do not log submission mode rewrites if they do not change the address.
3685 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3687 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3688 log files in place. Contributed by Roberto Lima.
3690 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3692 TF/03 Bugzilla 615: When checking the local_parts router precondition
3693 after a local_part_suffix or local_part_prefix option, Exim now
3694 does not use the address's named list lookup cache, since this
3695 contains cached lookups for the whole local part.
3697 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3698 Robert Millan. Documentation is in experimental-spec.txt.
3700 TF/04 Bugzilla 668: Fix parallel build (make -j).
3702 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3704 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3705 Patch provided by Jan Srzednicki.
3707 TF/05 Leading white space used to be stripped from $spam_report which
3708 wrecked the formatting. Now it is preserved.
3710 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3711 that they are available at delivery time.
3713 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3715 TF/08 TLS error reporting now respects the incoming_interface and
3716 incoming_port log selectors.
3718 TF/09 Produce a more useful error message if an SMTP transport's hosts
3719 setting expands to an empty string.
3721 NM/06 Bugzilla 744: EXPN did not work under TLS.
3722 Patch provided by Phil Pennock.
3724 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3725 Patch provided by Richard Godbee.
3727 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3728 acl_smtp_notquit, added index entry.
3730 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3731 Patch provided by Eugene Bujak.
3733 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3734 accept(). Patch provided by Maxim Dounin.
3736 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3737 Patch provided by Phil Pennock.
3739 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3741 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3742 Patch provided by Brad "anomie" Jorsch.
3744 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3745 Patch provided by Dean Brooks.
3747 TK/05 Add native DKIM support (does not depend on external libraries).
3749 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3750 Patch provided by Graeme Fowler.
3752 NM/16 Bugzilla 851: Documentation example syntax fix.
3754 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3756 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3759 NM/19 Bugzilla 745: TLS version reporting.
3760 Patch provided by Phil Pennock.
3762 NM/20 Bugzilla 167: bool: condition support.
3763 Patch provided by Phil Pennock.
3765 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3766 clients. Patch provided by Phil Pennock.
3768 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3769 Patch provided by Brad "anomie" Jorsch.
3771 NM/23 Bugzilla 687: Fix misparses in eximstats.
3772 Patch provided by Heiko Schlittermann.
3774 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3775 Patch provided by Heiko Schlittermann.
3777 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3778 plus update to original patch.
3780 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3782 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3783 Patch provided by David Brownlee.
3785 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3787 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3789 NM/30 Bugzilla 888: TLS documentation bugfixes.
3791 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3793 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3794 Unlike the original bugzilla I have changed all shell scripts in src tree.
3796 NM/33 Bugzilla 898: Transport filter timeout fix.
3797 Patch by Todd Rinaldo.
3799 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3800 Patch by Serge Demonchaux.
3802 NM/35 Bugzilla 39: Base64 decode bug fixes.
3803 Patch by Jakob Hirsch.
3805 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3807 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3809 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3811 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3817 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3818 ALT-N's libdkim that I have put here:
3819 http://duncanthrax.net/exim-experimental/
3821 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3822 were called 'true' and it seems that C99 defines that as a reserved
3823 keyword to be used with 'bool' variable types. That means you could
3824 not include C99-style headers which use bools without triggering
3825 build errors in sieve.c.
3827 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3828 as mailq or other aliases. Changed the --help handling significantly
3829 to do whats expected. exim_usage() emits usage/help information.
3831 SC/01 Added the -bylocaldomain option to eximstats.
3833 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3835 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3837 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3843 PH/01 Another patch from the Sieve maintainer.
3845 PH/02 When an IPv6 address is converted to a string for single-key lookup
3846 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3847 dots are used instead of colons so that keys in lsearch files need not
3848 contain colons. This was done some time before quoting was made available
3849 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3850 (notated using the quote facility) so as to distinguish them from IPv4
3851 keys. This meant that lookups for IP addresses in host lists did not work
3852 for iplsearch lookups.
3854 This has been fixed by arranging for IPv6 addresses to be expressed with
3855 colons if the lookup type is iplsearch. This is not incompatible, because
3856 previously such lookups could never work.
3858 The situation is now rather anomalous, since one *can* have colons in
3859 ordinary lsearch keys. However, making the change in all cases is
3860 incompatible and would probably break a number of configurations.
3862 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3865 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3866 conversion specification without a maximum field width, thereby enabling
3867 a rogue spamd server to cause a buffer overflow. While nobody in their
3868 right mind would setup Exim to query an untrusted spamd server, an
3869 attacker that gains access to a server running spamd could potentially
3870 exploit this vulnerability to run arbitrary code as the Exim user.
3872 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3873 $primary_hostname instead of what libspf2 thinks the hosts name is.
3875 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3876 a directory entry by the name of the lookup key. Previously, if a
3877 symlink pointed to a non-existing file or a file in a directory that
3878 Exim lacked permissions to read, a lookup for a key matching that
3879 symlink would fail. Now it is enough that a matching directory entry
3880 exists, symlink or not. (Bugzilla 503.)
3882 PH/03 The body_linecount and body_zerocount variables are now exported in the
3885 PH/04 Added the $dnslist_matched variable.
3887 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3888 This means they are set thereafter only if the connection becomes
3891 PH/06 Added the client_condition to authenticators so that some can be skipped
3892 by clients under certain conditions.
3894 PH/07 The error message for a badly-placed control=no_multiline_responses left
3895 "_responses" off the end of the name.
3897 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3899 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3900 (without spaces) instead of just copying the configuration text.
3902 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3904 PH/11 Added $max_received_linelength.
3906 PH/12 Added +ignore_defer and +include_defer to host lists.
3908 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3909 way in which PCRE > 7.0 is built.
3911 PH/14 Implemented queue_only_load_latch.
3913 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3914 MAIL command. The effect was to mangle the value on 64-bit systems.
3916 PH/16 Another patch from the Sieve maintainer.
3918 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3920 PH/18 If a system quota error occurred while trying to create the file for
3921 a maildir delivery, the message "Mailbox is full" was not appended to the
3922 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3923 only to a quota excession during the actual writing of the file.
3925 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3926 characters?) which causes problems in log lines. The DN values are now
3927 passed through string_printing() before being added to log lines.
3929 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3930 and InterBase are left for another time.)
3932 PH/21 Added message_body_newlines option.
3934 PH/22 Guard against possible overflow in moan_check_errorcopy().
3936 PH/23 POSIX allows open() to be a macro; guard against that.
3938 PH/24 If the recipient of an error message contained an @ in the local part
3939 (suitably quoted, of course), incorrect values were put in $domain and
3940 $local_part during the evaluation of errors_copy.
3946 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3947 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3950 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3951 issue a MAIL command.
3953 PH/02 In an ACL statement such as
3955 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3957 if a client was not listed at all, or was listed with a value other than
3958 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3959 the condition was not true (as it should be), so access was not denied.
3960 The bug was that the ! inversion was incorrectly passed on to the second
3961 item. This has been fixed.
3963 PH/03 Added additional dnslists conditions == and =& which are different from
3964 = and & when the dns lookup returns more than one IP address.
3966 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3967 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3969 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3970 FSYNC, which compiles an option called disable_fsync that allows for
3971 bypassing fsync(). The documentation is heavily laced with warnings.
3973 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3975 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3976 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3977 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3978 including adding "make clean"; (3) Added -fPIC when compiling the test
3979 dynamically loaded module, to get rid of a warning.
3981 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3982 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3983 = 0s. The bug is otherwise harmless.
3985 PH/07 There was a bug in the dovecot authenticator such that the value of
3986 $auth1 could be overwritten, and so not correctly preserved, after a
3987 successful authentication. This usually meant that the value preserved by
3988 the server_setid option was incorrect.
3990 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3992 PH/09 Installed PCRE release 7.0.
3994 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3995 run for batched SMTP input. It is now run at the start of every message
3996 in the batch. While fixing this I discovered that the process information
3997 (output by running exiwhat) was not always getting set for -bs and -bS
3998 input. This is fixed, and it now also says "batched" for BSMTP.
4000 PH/11 Added control=no_pipelining.
4002 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
4003 patch, slightly modified), and move the expansion of helo_data till after
4004 the connection is made in the smtp transport (so it can use these
4007 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4009 PH/14 Added log_selector = +pid.
4011 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4013 PH/16 Add ${if forany and ${if forall.
4015 PH/17 Added dsn_from option to vary the From: line in DSNs.
4017 PH/18 Flush SMTP output before performing a callout, unless control =
4018 no_callout_flush is set.
4020 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4021 was true (the default) a successful delivery failed to delete the retry
4022 item, thus causing premature timeout of the address. The bug is now
4025 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4027 PH/21 Long custom messages for fakedefer and fakereject are now split up
4028 into multiline responses in the same way that messages for "deny" and
4029 other ACL rejections are.
4031 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4032 with slight modification.
4034 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4035 draft, changing the syntax and factoring some duplicate code".
4037 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4038 for deliveries of the second and subsequent messages over the same SMTP
4041 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4042 ${reduce, with only minor "tidies".
4044 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4046 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4047 expansion side effects.
4049 PH/27 When a message times out after an over-quota error from an Exim-imposed
4050 quota, the bounce message says "mailbox is full". This message was not
4051 being given when it was a system quota that was exceeded. It now should
4054 MH/03 Made $recipients available in local_scan(). local_scan() already has
4055 better access to the recipient list through recipients_list[], but
4056 $recipients can be useful in postmaster-provided expansion strings.
4058 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4059 in the case of a MAIL command with additional options following the
4060 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4061 were accidentally chopped off.
4063 PH/29 SMTP synchronization checks are implemented when a command is read -
4064 there is a check that no more input is waiting when there shouldn't be
4065 any. However, for some commands, a delay in an ACL can mean that it is
4066 some time before the response is written. In this time, more input might
4067 arrive, invalidly. So now there are extra checks after an ACL has run for
4068 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4069 pipelining has not been advertised.
4071 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4073 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4074 returned in the SMTP response when smtp_return_error_details was false.
4075 This has been fixed.
4077 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4078 instead of the C I/O that was originally supplied, because problems were
4079 reported on Solaris.
4081 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4082 Exim which did not show up earlier: it was assuming that a call to
4083 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4084 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4085 was a macro that became an assignment, so it seemed to work. This has
4086 changed to a proper function call with a void return, hence the compile
4087 error. Exim's code has been fixed.
4089 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4092 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4094 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4096 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4097 because it turns out to be too big or there is a timeout) there is no
4098 "Completed" line in the log. When some messages of this type were
4099 selected by exigrep, they were listed as "not completed". Others were
4100 picked up by some special patterns. I have improved the selection
4101 criteria to be more general.
4103 PH/38 The host_find_failed option in the manualroute router can now be set
4104 to "ignore", to completely ignore a host whose IP address cannot be
4105 found. If all hosts are ignored, the behaviour is controlled by the new
4106 host_all_ignored option.
4108 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4109 homing or because of multiple MX records with /mx) generated more than
4110 one IP address, and the following item turned out to be the local host,
4111 all the secondary addresses of the first item were incorrectly removed
4112 from the list, along with the local host and any following hosts (which
4113 is what is supposed to happen).
4115 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4116 whoever called Exim into the -H file. In the case of the daemon it was
4117 behaving confusingly. When first started, it used values for whoever
4118 started the daemon, but after a SIGHUP it used the Exim user (because it
4119 calls itself on a restart). I have changed the code so that it now always
4122 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4123 message are rejected with the same error (e.g. no authentication or bad
4124 sender address), and a DATA command is nevertheless sent (as can happen
4125 with PIPELINING or a stupid MUA), the error message that was given to the
4126 RCPT commands is included in the rejection of the DATA command. This is
4127 intended to be helpful for MUAs that show only the final error to their
4130 PH/42 Another patch from the Sieve maintainer.
4132 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4133 Eximstats - Fixed some broken HTML links and added missing column headers
4135 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4136 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4138 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4140 PH/43 Yet another patch from the Sieve maintainer.
4142 PH/44 I found a way to check for a TCP/IP connection going away before sending
4143 the response to the final '.' that terminates a message, but only in the
4144 case where the client has not sent further data following the '.'
4145 (unfortunately, this is allowed). However, in many cases there won't be
4146 any further data because there won't be any more messages to send. A call
4147 to select() can be used: if it shows that the input is "ready", there is
4148 either input waiting, or the socket has been closed. An attempt to read
4149 the next input character can distinguish the two cases. Previously, Exim
4150 would have sent an OK response which the client would never have see.
4151 This could lead to message repetition. This fix should cure that, at
4152 least in a lot of common cases.
4154 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4155 advertised in response to EHLO.
4161 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4162 fixed by 4.65/MH/01 (is this a record?) are fixed:
4164 (i) An empty string was always treated as zero by the numeric comparison
4165 operators. This behaviour has been restored.
4167 (ii) It is documented that the numeric comparison operators always treat
4168 their arguments as decimal numbers. This was broken in that numbers
4169 starting with 0 were being interpreted as octal.
4171 While fixing these problems I realized that there was another issue that
4172 hadn't been noticed. Values of message_size_limit (both the global option
4173 and the transport option) were treated as octal if they started with 0.
4174 The documentation was vague. These values are now always treated as
4175 decimal, and I will make that clear in the documentation.
4181 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4182 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4185 MH/01 Don't check that the operands of numeric comparison operators are
4186 integers when their expansion is in "skipping" mode (fixes bug
4187 introduced by 4.64-PH/07).
4189 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4190 child addresses, Exim now panics and dies. Previously, because the count
4191 is held in a short int, deliveries were likely to be lost. As such a
4192 large number of recipients for a single message is ridiculous
4193 (performance will be very, very poor), I have chosen to impose a limit
4194 rather than extend the field.
4200 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4201 leftover -K file (the existence of which was triggered by #402).
4202 While we were at it, introduced process PID as part of the -K
4203 filename. This should rule out race conditions when creating
4206 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4207 processing considerably. Previous code took too long for large mails,
4208 triggering a timeout which in turn triggers #401.
4210 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4211 in the DK code in transports.c. sendfile() is not really portable,
4212 hence the _LINUX specificness.
4214 TF/01 In the add_headers option to the mail command in an Exim filter,
4215 there was a bug that Exim would claim a syntax error in any
4216 header after the first one which had an odd number of characters
4219 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4220 callout verification, Exim cached a "reject" for the entire domain. This
4221 is correct for most verifications, but it is not correct for a recipient
4222 verification with use_sender or use_postmaster set, because in that case
4223 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4224 case of MAIL FROM:<> rejection from other early rejections (e.g.
4225 rejection of HELO). When verifying a recipient using a non-null MAIL
4226 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4227 Whatever the result of the callout, the value of the domain cache is
4228 left unchanged (for any other kind of callout, getting as far as trying
4229 RCPT means that the domain itself is ok).
4231 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4234 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4235 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4236 session, the daemon ignores ECONNECT errors and logs others; it now
4237 ignores EPIPE as well.
4239 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4240 (quoted-printable decoding).
4242 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4243 later the small subsequent patch to fix an introduced bug.
4245 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4247 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4249 PH/08 An error is now given if message_size_limit is specified negative.
4251 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4252 to be given (somewhat) arbitrary names.
4254 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4257 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4258 miscellaneous code fixes
4260 PH/10 Added the log_reject_target ACL modifier to specify where to log
4263 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4264 hostname. This is wrong, because it relates to the incoming message (and
4265 probably the interface on which it is arriving) and not to the outgoing
4266 callout (which could be using a different interface). This has been
4267 changed to use the value of the helo_data option from the smtp transport
4268 instead - this is what is used when a message is actually being sent. If
4269 there is no remote transport (possible with a router that sets up host
4270 addresses), $smtp_active_hostname is used.
4272 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4273 tweaks were necessary in order to get it to work (see also 21 below):
4274 (a) The code assumed that strncpy() returns a negative number on buffer
4275 overflow, which isn't the case. Replaced with Exim's string_format()
4277 (b) There were several signed/unsigned issues. I just did the minimum
4278 hacking in of casts. There is scope for a larger refactoring.
4279 (c) The code used strcasecmp() which is not a standard C function.
4280 Replaced with Exim's strcmpic() function.
4281 (d) The code set only $1; it now sets $auth1 as well.
4282 (e) A simple test gave the error "authentication client didn't specify
4283 service in request". It would seem that Dovecot has changed its
4284 interface. Fortunately there's a specification; I followed it and
4285 changed what the client sends and it appears to be working now.
4287 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4290 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4291 address A is aliased to B and C, where B exists and C does not. Without
4292 -v the output is "A verified" because verification stops after a
4293 successful redirection if more than one address is generated. However,
4294 with -v the child addresses are also verified. Exim was outputting "A
4295 failed to verify" and then showing the successful verification for C,
4296 with its parentage. It now outputs "B failed to verify", showing B's
4297 parentage before showing the successful verification of C.
4299 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4300 look up a TXT record in a specific list after matching in a combined
4303 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4304 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4305 they consult the DNS. I had assumed they would set it the way they
4306 wanted; and indeed my experiments on Linux seem to show that in some
4307 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4308 To be on the safe side, however, I have now made the interface to
4309 host_find_byname() similar to host_find_bydns(), with an argument
4310 containing the DNS resolver options. The host_find_byname() function now
4311 sets these options at its start, just as host_find_bydns() does. The smtp
4312 transport options dns_qualify_single and dns_search_parents are passed to
4313 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4314 of host_find_byname() use the default settings of RES_DEFNAMES
4315 (qualify_single) but not RES_DNSRCH (search_parents).
4317 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4318 spool_read_header() do less string testing, by means of a preliminary
4319 switch on the second character of optional "-foo" lines. (This is
4320 overdue, caused by the large number of possibilities that now exist.
4321 Originally there were few.) While I was there, I also converted the
4322 str(n)cmp tests so they don't re-test the leading "-" and the first
4323 character, in the hope this might squeeze out yet more improvement.
4325 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4326 flag allowing group syntax was set by the header_syntax check but not
4327 turned off, possible causing trouble later; (2) The flag was not being
4328 set at all for the header_verify test, causing "group"-style headers to
4329 be rejected. I have now set it in this case, and also caused header_
4330 verify to ignore an empty address taken from a group. While doing this, I
4331 came across some other cases where the code for allowing group syntax
4332 while scanning a header line wasn't quite right (mostly, not resetting
4333 the flag correctly in the right place). These bugs could have caused
4334 trouble for malformed header lines. I hope it is now all correct.
4336 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4337 with the "reply" argument non-NULL. The code, however (which originally
4338 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4339 but it didn't always do it. This confused somebody who was copying the
4340 code for some other use. I have removed all the tests.
4342 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4343 feature that was used to support insecure browsers during the U.S. crypto
4344 embargo. It requires special client support, and Exim is probably the
4345 only MTA that supported it -- and would never use it because real RSA is
4346 always available. This code has been removed, because it had the bad
4347 effect of slowing Exim down by computing (never used) parameters for the
4348 RSA_EXPORT functionality.
4350 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4351 authenticator to fail if there's a tab character in the incoming data
4352 (there should never be unless someone is messing about, as it's supposed
4353 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4354 if the connection is using TLS or if the remote IP is the same as the
4355 local IP, and the "valid-client-cert option" if a client certificate has
4358 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4359 authenticators. This can be used for authorization after authentication
4360 succeeds. (In the case of plaintext, it servers for both authentication
4363 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4364 if any retry times were supplied.
4366 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4367 connection, where there is no client IP address to check. In this
4368 situation, the verify now always succeeds.
4370 PH/25 Applied John Jetmore's -Mset patch.
4372 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4374 PH/27 In a string expansion for a processed (not raw) header when multiple
4375 headers of the same name were present, leading whitespace was being
4376 removed from all of them, but trailing whitespace was being removed only
4377 from the last one. Now trailing whitespace is removed from each header
4378 before concatenation. Completely empty headers in a concatenation (as
4379 before) are ignored.
4381 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4382 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4384 PH/29 [Removed. This was a change that I later backed out, and forgot to
4385 correct the ChangeLog entry (that I had efficiently created) before
4386 committing the later change.]
4388 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4389 address errors (4xx response to RCPT) over the same connection as other
4390 messages routed to the same hosts. Such deliveries are always "forced",
4391 so retry times are not inspected. This resulted in far too many retries
4392 for the affected addresses. The effect occurred only when there were more
4393 hosts than the hosts_max_try setting in the smtp transport when it had
4394 the 4xx errors. Those hosts that it had tried were not added to the list
4395 of hosts for which the message was waiting, so if all were tried, there
4396 was no problem. Two fixes have been applied:
4398 (i) If there are any address or message errors in an SMTP delivery, none
4399 of the hosts (tried or untried) are now added to the list of hosts
4400 for which the message is waiting, so the message should not be a
4401 candidate for sending over the same connection that was used for a
4402 successful delivery of some other message. This seems entirely
4403 reasonable: after all the message is NOT "waiting for some host".
4404 This is so "obvious" that I'm not sure why it wasn't done
4405 previously. Hope I haven't missed anything, but it can't do any
4406 harm, as the worst effect is to miss an optimization.
4408 (ii) If, despite (i), such a delivery is accidentally attempted, the
4409 routing retry time is respected, so at least it doesn't keep
4410 hammering the server.
4412 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4413 in ${readsocket because some servers need this prod.
4415 PH/32 Added some extra debug output when updating a wait-xxx database.
4417 PH/33 The hint "could be header name not terminated by colon", which has been
4418 given for certain expansion errors for a long time, was not being given
4419 for the ${if def:h_colon_omitted{... case.
4421 PH/34 The spec says: "With one important exception, whenever a domain list is
4422 being scanned, $domain contains the subject domain." There was at least
4423 one case where this was not true.
4425 PH/35 The error "getsockname() failed: connection reset by peer" was being
4426 written to the panic log as well as the main log, but it isn't really
4427 panic-worthy as it just means the connection died rather early on. I have
4428 removed the panic log writing for the ECONNRESET error when getsockname()
4431 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4432 runs only) independently of the message's sender address. This meant
4433 that, if the 4xx error was in fact related to the sender, a different
4434 message to the same recipient with a different sender could confuse
4435 things. In particular, this can happen when sending to a greylisting
4436 server, but other circumstances could also provoke similar problems.
4437 I have changed the default so that the retry time for these errors is now
4438 based a combination of the sender and recipient addresses. This change
4439 can be overridden by setting address_retry_include_sender=false in the
4442 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4443 remote server are returned as part of bounce messages. This was not
4444 happening for LMTP over a pipe (the lmtp transport), but now it is the
4445 same for both kinds of LMTP.
4447 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4448 in header lines that were in fact CNAMEs. This is no longer the case.
4450 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4451 and queue runs started by the daemon processed all messages. This has
4452 been fixed so that -R and -S can now usefully be given with -q<time>.
4454 PH/40 Import PCRE release 6.7 (fixes some bugs).
4456 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4458 PH/42 Give an error if -q is specified more than once.
4460 PH/43 Renamed the variables $interface_address and $interface_port as
4461 $received_ip_address and $received_port, to make it clear that these
4462 values apply to message reception, and not to the outgoing interface when
4463 a message is delivered. (The old names remain recognized, of course.)
4465 PH/44 There was no timeout on the connect() call when using a Unix domain
4466 socket in the ${readsocket expansion. There now is.
4468 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4469 be meaningful with "accept".
4471 SC/01 Eximstats V1.43
4472 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4474 SC/02 Eximstats V1.44
4475 Use a glob alias rather than an array ref in the generated
4476 parser. This improves both readability and performance.
4478 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4479 Collect SpamAssassin and rejection statistics.
4480 Don't display local sender or destination tables unless
4481 there is data to show.
4482 Added average volumes into the top table text output.
4484 SC/04 Eximstats V1.46
4485 Collect data on the number of addresses (recipients)
4486 as well as the number of messages.
4488 SC/05 Eximstats V1.47
4489 Added 'Message too big' to the list of mail rejection
4490 reasons (thanks to Marco Gaiarin).
4492 SC/06 Eximstats V1.48
4493 Mainlog lines which have GMT offsets and are too short to
4494 have a flag are now skipped.
4496 SC/07 Eximstats V1.49 (Alain Williams)
4497 Added the -emptyok flag.
4499 SC/08 Eximstats V1.50
4500 Fixes for obtaining the IP address from reject messages.
4502 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4503 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4504 whitespace changes from 4.64-PH/27
4506 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4509 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4510 are found, allow negative numbers in numeric criteria)
4512 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4514 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4515 to match changes made in 4.64-PH/43
4517 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4519 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4520 "domain" is actually an IP address, and force a failure. This locks out
4521 those revolvers/nameservers that support "A-for-A" lookups, in
4522 contravention of the specifications.
4524 PH/48 When a host name was looked up from an IP address, and the subsequent
4525 forward lookup of the name timed out, the host name was left in
4526 $sender_host_name, contrary to the specification.
4528 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4529 restricted to single-key lookups, Exim was not diagnosing an error if
4530 * or *@ was used with a query-style lookup.
4532 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4534 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4535 long ago, but noone interested enough thought of it. Let's just say that
4536 the "1.1" means that there are some new functions that weren't there at
4537 some point in the past.
4539 PH/51 Error processing for expansion failure of helo_data from an smtp
4540 transport during callout processing was broken.
4542 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4543 tested/used via the -bh/-bhc/-bs options.
4545 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4546 bug, fixed in subsequent PCRE releases).
4548 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4549 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4551 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4557 SC/01 Use a glob alias rather than an array ref in eximstats generated
4558 parser. This improves both readability and performance.
4560 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4561 Don't display local sender or destination tables in eximstats unless
4562 there is data to show.
4563 Added average volumes into the eximstats top table text output.
4565 SC/03 Collect data on the number of addresses (recipients) as well
4566 as the number of messages in eximstats.
4568 TF/01 Correct an error in the documentation for the redirect router. Exim
4569 does (usually) call initgroups() when daemonizing.
4571 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4572 with consistent privilege compared to when running as a daemon.
4574 TF/03 Note in the spec that $authenticated_id is not set for local
4575 submissions from trusted users.
4577 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4578 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4580 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4581 by adding some example configuration directives to the default
4582 configuration file. A little bit of work is required to uncomment the
4583 directives and define how usernames and passwords are checked, but
4584 there is now a framework to start from.
4586 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4587 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4588 without this. I don't know how relevant this is to other LDAP libraries.
4590 PH/02 Add the verb name to the "unknown ACL verb" error.
4592 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4594 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4596 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4597 directory not expanded when it should be if an expanded home directory
4598 was set for the address (which is overridden by the transport).
4600 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4603 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4604 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4605 because it is too late at that time, and has no effect.
4607 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4608 security issue with \' (bugzilla #107). I could not use the
4609 PQescapeStringConn() function, because it needs a PGconn value as one of
4612 PH/08 When testing addresses using -bt, indicate those final addresses that
4613 are duplicates that would not cause an additional delivery. At least one
4614 person was confused, thinking that -bt output corresponded to deliveries.
4615 (Suppressing duplicates isn't a good idea as you lose the information
4616 about possibly different redirections that led to the duplicates.)
4618 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4619 systems where poll() doesn't work, in particular OS X.
4621 PH/10 Added more information to debugging output for retry time not reached.
4623 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4624 operations in malware.c.
4626 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4629 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4630 syslog_duplication set false, log lines that would normally be written
4631 both the the main log and to the reject log were not written to syslog at
4634 PH/14 In the default configuration, change the use of "message" in ACL warn
4635 statements to "add_header".
4637 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4638 not followed by a command (e.g. "seen endif").
4640 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4641 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4644 PH/17 Added extra conditions to the default value of delay_warning_condition
4648 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4649 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4650 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4653 The Auto-Submitted: and various List- headers are standardised, whereas I
4654 don't think Precedence: ever was.
4656 PH/18 Refactored debugging code in route_finduser() to show more information,
4657 in particular, the error code if getpwnam() issues one.
4659 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4660 This is apparently needed in addition to the PH/07 change above to avoid
4661 any possible encoding problems.
4663 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4664 but not after initializing Perl.
4666 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4667 output them only if debugging. By default they are written stderr,
4668 apparently, which is not desirable.
4670 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4673 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4676 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4678 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4679 authenticated or an ident call has been made. Suppress the default
4680 values for $authenticated_id and $authenticated_sender (but permit -oMai
4681 and -oMas) when testing with -bh.
4683 PH/24 Re-jigged the order of the tests in the default configuration so that the
4684 tests for valid domains and recipients precede the DNS black list and CSA
4685 tests, on the grounds that those ones are more expensive.
4687 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4688 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4689 This bug exists in every version of Exim that I still have, right back to
4692 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4693 However, an attempt to turn on case-sensitivity in a regex key by
4694 including (?-i) didn't work because the subject string was already
4695 lowercased, and the effects were non-intuitive. It turns out that a
4696 one-line patch can be used to allow (?-i) to work as expected.
4702 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4703 other effects) broke the use of negated acl sub-conditions.
4705 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4708 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4709 "Deny" causes Exim to reject the incoming connection with a 554 error.
4710 Unfortunately, if there is a major crisis, such as a disk failure,
4711 tcp-wrappers gives "deny", whereas what one would like would be some
4712 kind of temporary error. A kludge has been added to help with this.
4713 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4714 554 error is used if errno is still zero or contains ENOENT (which occurs
4715 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4718 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4720 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4721 errors. Otherwise a message that provokes a temporary error (when other
4722 messages do not) can cause a whole host to time out.
4724 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4725 addresses were routed directly to files or pipes from a redirect router.
4726 File deliveries just didn't batch; pipe deliveries might have suffered
4729 PH/06 A failure to get a lock for a hints database would erroneously always say
4730 "Failed to get write lock", even when it was really a read lock.
4732 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4733 of 0600. This has been changed to use the value of the lockfile_mode
4734 option (which defaults to 0600).
4736 PH/08 Applied small patch from the Sieve maintainer.
4738 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4739 folder from quota calculations, a direct delivery into this folder messed
4740 up the contents of the maildirsize file. This was because the regex was
4741 used only to exclude .Trash (or whatever) when the size of the mailbox
4742 was calculated. There was no check that a delivery was happening into an
4743 excluded directory. This bug has been fixed by ignoring all quota
4744 processing for deliveries into excluded directories.
4746 PH/10 Added the maildirfolder_create_regex option to appendfile.
4752 PH/01 The code for finding all the local interface addresses on a FreeBSD
4753 system running IPv6 was broken. This may well have applied to all BSD
4754 systems, as well as to others that have similar system calls. The broken
4755 code found IPv4 interfaces correctly, but gave incorrect values for the
4756 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4757 that it would not match correctly against @[] and not recognize the IPv6
4760 PH/02 The ipliteral router was not recognizing addresses of the form user@
4761 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4763 PH/03 Added disable_ipv6.
4765 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4766 decoded form, because it is most often used to construct To: headers
4767 lines in autoreplies, and the decoded form may well be syntactically
4768 invalid. However, $reply_address has leading white space removed, and all
4769 newlines turned into spaces so that the autoreply transport does not
4772 PH/05 If group was specified without a user on a router, and no group or user
4773 was specified on a transport, the group from the router was ignored.
4775 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4776 for visible compile-time settings that can be used to change these
4777 numbers, for those that want even more. Backwards compatibility with old
4778 spool files has been maintained. However, going back to a previous Exim
4779 release will lost any variables that are in spool files.
4781 PH/07 Two small changes when running in the test harness: increase delay when
4782 passing a TCP/IP connection to a new process, in case the original
4783 process has to generate a bounce, and remove special handling of
4784 127.0.0.2 (sic), which is no longer necessary.
4786 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4787 be the same on different OS.
4789 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4792 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4793 whether --show-vars was specified or not
4795 JJ/02 exipick: Added support for new ACL variable spool format introduced
4798 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4799 syntactically invalid From: or Reply-to: line, and a filter used this to
4800 generate an autoreply, and therefore failed to obtain an address for the
4801 autoreply, Exim could try to deliver to a non-existent relative file
4802 name, causing unrelated and misleading errors. What now happens is that
4803 it logs this as a hard delivery error, but does not attempt to create a
4806 PH/11 The exinext utility has a -C option for testing purposes, but although
4807 the given file was scanned by exinext itself; it wasn't being passed on
4808 when Exim was called.
4810 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4811 an end-of-file indication when reading a command response.
4813 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4814 compiled. In many other places in Exim, IPv6 addresses are always
4815 recognized, so I have changed this. It also means that IPv4 domain
4816 literals of the form [IPV4:n.n.n.n] are now always recognized.
4818 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4819 used if the router is not running as root, for example, when verifying at
4820 ACL time, or when using -bh. The debugging output from this situation was
4821 non-existent - all you got was a failure to exec. I have made two
4824 (a) Failures to set uid/gid, the current directory, or a process leader
4825 in a subprocess such as that created by queryprogram now generate
4826 suitable debugging output when -d is set.
4828 (b) The queryprogram router detects when it is not running as root,
4829 outputs suitable debugging information if -d is set, and then runs
4830 the subprocess without attempting to change uid/gid.
4832 PH/15 Minor change to Makefile for building test_host (undocumented testing
4835 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4836 additional section of a DNS packet that returns MX or SRV records.
4837 Instead, it always explicitly searches for A/AAAA records. This avoids
4838 major problems that occur when a DNS server includes only records of one
4839 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4840 fixed another bug: if SRV records were looked up and the corresponding
4841 address records were *not* found in the additional section, the port
4842 values from the SRV records were lost.
4844 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4845 using the correct key (the original address) when searching the retry
4846 rules in order to find which one to use for generating the retry hint.
4848 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4849 adding the default one. Similarly, if it contains a Reply-To: header, the
4850 errors_reply_to option, if set, is not used.
4852 PH/19 When calculating a retry time, Exim used to measure the "time since
4853 failure" by looking at the "first failed" field in the retry record. Now
4854 it does not use this if it is later than than the arrival time of the
4855 message. Instead it uses the arrival time. This makes for better
4856 behaviour in cases where some deliveries succeed, thus re-setting the
4857 "first failed" field. An example is a quota failure for a huge message
4858 when small messages continue to be delivered. Without this change, the
4859 "time since failure" will always be short, possible causing more frequent
4860 delivery attempts for the huge message than are intended.
4861 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4863 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4864 $1, $2, $3) because the numerical variables can be reset during some
4865 expansion items (e.g. "match"), thereby losing the authentication data.
4867 PH/21 Make -bV show the size of off_t variables so that the test suite can
4868 decide whether to run tests for quotas > 2G.
4870 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4871 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4872 filecount value is greater than 2G or if a quota value is greater than 2G
4873 on a system where the size of off_t is not greater than 4, a panic error
4876 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4877 never match. The debug and -bh output now contains an explicit error
4878 message indicating a malformed IPv4 address or mask.
4880 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4881 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4882 PH/23 above applies.
4884 PH/25 Do not write to syslog when running in the test harness. The only
4885 occasion when this arises is a failure to open the main or panic logs
4886 (for which there is an explicit test).
4888 PH/26 Added the /no_tell option to "control=freeze".
4890 PH/27 If a host name lookup failed very early in a connection, for example, if
4891 the IP address matched host_lookup and the reverse lookup yielded a name
4892 that did not have a forward lookup, an error message of the form "no IP
4893 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4894 could be logged. Now it outputs the IP address instead of "NULL".
4896 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4897 allows the sender and the authenticated sender to be set when
4898 submitting a message from within Exim. Since child_open_exim() is
4899 documented for local_scan(), the new function should be too.
4901 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4902 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4903 results in an empty string is now treated as unset.
4905 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4907 PH/31 Added sender_verify_fail logging option.
4909 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4910 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4911 tidied the source and removed it altogether.
4913 PH/33 When a queue run was abandoned because the load average was too high, a
4914 log line was always written; now it is written only if the queue_run log
4915 selector is set. In addition, the log line for abandonment now contains
4916 information about the queue run such as the pid. This is always present
4917 in "start" and "stop" lines but was omitted from the "abandon" line.
4919 PH/34 Omit spaces between a header name and the colon in the error message that
4920 is given when verify = headers_syntax fails (if there are lots of them,
4921 the message gets confusing).
4923 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4924 names, as there are now some PTR records that contain slashes. This check
4925 is only to protect against broken name servers that fall over on strange
4926 characters, so the fact that it applies to all lookups doesn't matter.
4928 PH/36 Now that the new test suite is complete, we can remove some of the
4929 special code in Exim that was needed for the old test suite. For example,
4930 sorting DNS records because real resolvers return them in an arbitrary
4931 order. The new test suite's fake resolver always returns records in the
4934 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4935 bounces) except when queue_only is set, to avoid logging races between
4936 the different processes.
4938 PH/38 Panic-die if .include specifies a non-absolute path.
4940 PH/39 A tweak to the "H" retry rule from its user.
4942 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4943 a label. They prevented compilation on older perls.
4945 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4946 a warning to be raised on newish perls.
4948 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4949 on queue. Changes to match documented behaviour of showing count of
4950 messages matching specified criteria.
4952 PH/40 Changed the default ident timeout from 30s to 5s.
4954 PH/41 Added support for the use of login_cap features, on those BSD systems
4955 that have them, for controlling the resources used by pipe deliveries.
4957 PH/42 The content-scanning code uses fopen() to create files in which to put
4958 message data. Previously it was not paying any attention to the mode of
4959 the files. Exim runs with umask(0) because the rest of the code creates
4960 files with open(), and sets the required mode explicitly. Thus, these
4961 files were ending up world-writeable. This was not a big issue, because,
4962 being within the spool directory, they were not world-accessible. I have
4963 created a function called modefopen, which takes an additional mode
4964 argument. It sets umask(777), creates the file, chmods it to the required
4965 mode, then resets the umask. All the relevant calls to fopen() in the
4966 content scanning code have been changed to use this function.
4968 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4969 to 24 hours. This avoids potential overflow problems when processing G
4970 and H retry rules. I suspect nobody ever tinkers with this value.
4972 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4974 PH/45 When the plaintext authenticator is running as a client, the server's
4975 challenges are checked to ensure they are valid base64 strings. By
4976 default, the authentication attempt is cancelled if an invalid string is
4977 received. Setting client_ignore_invalid_base64 true ignores these errors.
4978 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4979 they are received. Thus, the responses can be made to depend on the
4980 challenges. If an invalid string is ignored, an empty string is placed in
4983 PH/46 Messages that are created by the autoreply transport now contains a
4984 References: header, in accordance with RFCs 2822 and 3834.
4986 PH/47 Added authenticated_sender_force to the smtp transport.
4988 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4990 PH/49 Installed latest patch from the Sieve maintainer.
4992 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4993 was also set, the appendfile transport was unnecessarily scanning a
4994 directory of message files (e.g. for maildir delivery) to find the count
4995 of files (along with the size), even though it did not need this
4996 information. It now does the scan only if it needs to find either the
4997 size of the count of files.
4999 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
5001 PH/52 Two bugs concerned with error handling when the smtp transport is
5004 (i) Exim was not creating retry information for temporary errors given
5005 for individual recipients after the DATA command when the smtp transport
5006 was used in LMTP mode. This meant that they could be retried too
5007 frequently, and not timed out correctly.
5009 (ii) Exim was setting the flag that allows error details to be returned
5010 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5011 recipients that were returned after the DATA command.
5013 PH/53 This is related to PH/52, but is more general: for any failing address,
5014 when detailed error information was permitted to be returned to the
5015 sender, but the error was temporary, then after the final timeout, only
5016 "retry timeout exceeded" was returned. Now it returns the full error as
5017 well as "retry timeout exceeded".
5019 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5020 do this, and (what is worse) MTAs that accept it.
5022 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5023 will now be deprecated.
5025 PH/56 New os.c-cygwin from the Cygwin maintainer.
5027 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5028 formats (previously only available in exim formats via -bpr, -bpru,
5029 and -bpra. Now also available in native and exiqgrep formats)
5031 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5032 with very large, slow to parse queues
5034 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5036 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5038 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5039 responses to authentication challenges, though it was showing the
5040 challenges; (ii) I've removed the CR characters from the debug output for
5043 PH/58 Allow for the insertion of a newline as well as a space when a string
5044 is turned into more than one encoded-word during RFC 2047 encoding. The
5045 Sieve code now uses this.
5047 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5048 data_4xx, lost_connection, tls_required.
5050 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5051 message was being sent as an SMTP response.
5053 PH/61 Add -l and -k options to exicyclog.
5055 PH/62 When verifying, if an address was redirected to one new address, so that
5056 verification continued, and the new address failed or deferred after
5057 having set something in $address_data, the value of $address_data was not
5058 passed back to the ACL. This was different to the case when no
5059 redirection occurred. The value is now passed back in both cases.
5061 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5062 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5063 use login_cap.h, so on its own it isn't the distinguishing feature. The
5064 new name refers directly to the setclassresources() function.
5066 PH/65 Added configuration files for NetBSD3.
5068 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5070 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5071 is preferred over IPv4.
5073 PH/68 The bounce_return_message and bounce_return_body options were not being
5074 honoured for bounces generated during the reception of non-SMTP messages.
5075 In particular, this applied to messages rejected by the ACL. This bug has
5076 been fixed. However, if bounce_return_message is true and bounce_return_
5077 body is false, the headers that are returned for a non-SMTP message
5078 include only those that have been read before the error was detected.
5079 (In the case of an ACL rejection, they have all been read.)
5081 PH/69 The HTML version of the specification is now built in a directory called
5082 spec_html instead of spec.html, because the latter looks like a path with
5083 a MIME-type, and this confuses some software.
5085 PH/70 Catch two compiler warnings in sieve.c.
5087 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5088 function verify_get_ident() calls ip_connect() to connect a socket, but
5089 if the "connect()" function timed out, ip_connect() used to close the
5090 socket. However, verify_get_ident() also closes the socket later, and in
5091 between Exim writes to the log, which may get opened at this point. When
5092 the socket was closed in ip_connect(), the log could get the same file
5093 descriptor number as the socket. This naturally causes chaos. The fix is
5094 not to close the socket in ip_connect(); the socket should be closed by
5095 the function that creates it. There was only one place in the code where
5096 this was missing, in the iplookup router, which I don't think anybody now
5097 uses, but I've fixed it anyway.
5099 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5100 well as to direct DNS lookups. Otherwise the handling of names in host
5101 lists is inconsistent and therefore confusing.
5107 PH/01 Two changes to the default runtime configuration:
5109 (1) Move the checks for relay_from_hosts and authenticated clients from
5110 after to before the (commented out) DNS black list checks.
5112 (2) Add control=submission to the relay_from_hosts and authenticated
5113 clients checks, on the grounds that messages accepted by these
5114 statements are most likely to be submissions.
5116 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5118 (1) Generate an error if the third argument for the ${prvs expansion is
5121 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5124 (3) Reset the variables that are obtained from the first argument of
5125 ${prvscheck and used in the second argument before leaving the code,
5126 because their memory is reclaimed, so using them afterwards may do
5129 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5130 one (it's much easier than Tom thought :-).
5132 (5) Because of (4), we can now allow for the use of $prvscheck_result
5133 inside the third argument.
5135 PH/03 For some reason, the default setting of PATH when running a command from
5136 a pipe transport was just "/usr/bin". I have changed it to
5139 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5140 anything to be listed in the output from -bV.
5142 PH/05 When a filter generated an autoreply, the entire To: header line was
5143 quoted in the delivery log line, like this:
5145 => >A.N.Other <ano@some.domain> <original@ddress> ...
5147 This has been changed so that it extracts the operative address. There
5148 may be more than one such address. If so, they are comma-separated, like
5151 => >ano@some.domain,ona@other.domain <original@ddress> ...
5153 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5154 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5155 not being looked up in the rDNS to get a host name, Exim was showing the
5156 IP address twice in Received: lines, even though the IP addresses were
5157 identical. For example:
5159 Received: from [1.2.3.4] (helo=[1.2.3.4])
5161 However, if the real host name was known, it was omitting the HELO data
5162 if it matched the actual IP address. This has been tidied up so that it
5163 doesn't show the same IP address twice.
5165 PH/07 When both +timestamp and +memory debugging was on, the value given by
5166 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5167 called by the debug printing, thereby overwriting the timestamp buffer.
5168 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5170 PH/08 When the original message was included in an autoreply transport, it
5171 always said "this is a copy of the message, including all the headers",
5172 even if body_only or headers_only was set. It now gives an appropriate
5175 PH/09 Applied a patch from the Sieve maintainer which:
5177 o fixes some comments
5178 o adds the (disabled) notify extension core
5179 o adds some debug output for the result of if/elsif tests
5180 o points to the current vacation draft in the documentation
5181 and documents the missing references header update
5185 o fixes a bug in processing the envelope test (when testing
5186 multiple envelope elements, the last element determined the
5189 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5190 Electronic Mail") by including:
5192 Auto-submitted: auto-generated
5194 in the messages that it generates (bounce messages and others, such as
5195 warnings). In the case of bounce messages for non-SMTP messages, there was
5196 also a typo: it was using "Auto_submitted" (underscore instead of
5197 hyphen). Since every message generated by Exim is necessarily in response
5198 to another message, thes have all been changed to:
5200 Auto-Submitted: auto-replied
5202 in accordance with these statements in the RFC:
5204 The auto-replied keyword:
5206 - SHOULD be used on messages sent in direct response to another
5207 message by an automatic process,
5209 - MUST NOT be used on manually-generated messages,
5211 - MAY be used on Delivery Status Notifications (DSNs) and Message
5212 Disposition Notifications (MDNs),
5214 - MUST NOT be used on messages generated by automatic or periodic
5215 processes, except for messages which are automatic responses to
5218 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5219 to the default Received: header definition.
5221 PH/12 Added log selector acl_warn_skipped (default on).
5223 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5224 variables because (a) they are in the wrong storage pool and (b) even if
5225 they were copied, it wouldn't work properly because of the caching.
5227 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5228 checking when decoding. Apparently there are clients that generate
5229 overlong encoded strings. Why am I not surprised?
5231 PH/15 If the first argument of "${if match_address" was not empty, but did not
5232 contain an "@" character, Exim crashed. Now it writes a panic log message
5233 and treats the condition as false.
5235 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5237 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5238 extension "envelope-auth". The code is finished and in agreement with
5239 other implementations, but there is no documentation so far and in fact,
5240 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5241 not changing the active code.
5243 Print executed "if" and "elsif" statements when debugging is used. This
5244 helps a great deal to understand what a filter does.
5246 Document more things not specified clearly in RFC3028. I had all this
5247 sorted out, when out of a sudden new issues came to my mind. Oops."
5249 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5252 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5253 canonical form (as documented). However, after a host name lookup from
5254 the IP address, check_host() was doing a simple string comparison with
5255 addresses acquired from the DNS when checking that the found name did
5256 have the original IP as one of its addresses. Since any found IPv6
5257 addresses are likely to be in abbreviated form, the comparison could
5258 fail. Luckily, there already exists a function for doing the comparison
5259 by converting both addresses to binary, so now that is used instead of
5260 the text comparison.
5262 PH/20 There was another similar case to PH/19, when a complete host name was
5263 given in a host list; looking up its IP address could give an abbreviated
5264 form, whereas the current host's name might or might not be abbreviated.
5265 The same fix has been applied.
5271 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5272 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5275 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5276 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5278 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5280 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5281 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5282 Also, for "Auto-Submitted", treat anything other than "no" as
5283 non-personal, in accordance with RFC 3834. (Previously it treated
5284 anything starting "auto-" as non-personal.)
5286 TF/01 The control=submission/name=... option had a problem with syntax
5287 errors if the name included a slash character. The /name= option
5288 now slurps the rest of the string, so it can include any characters
5289 but it must come last in the list of options (after /sender_retain
5292 PH/05 Some modifications to the interface to the fake nameserver for the new
5300 TK/01 Added the "success_on_redirect" address verification option. See
5301 NewStuff for rationale and an example.
5303 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5305 PH/02 Patch to exigrep to allow it to work on syslog lines.
5307 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5308 fread() to skip over the body file's header line, because in Cygwin the
5309 header line is locked and is inaccessible.
5311 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5312 co-exist for some time) to make it clear that it is the Exim ID that is
5313 referenced, not the Message-ID: header line.
5315 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5316 string_format() function, because snprintf() does not exist on all
5319 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5320 ${stat: expansion item.
5322 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5323 protocol synchronization error", to keep the pedants happy.
5325 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5326 well as for IRIX systems, when gcc is being used. See the host.c source
5329 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5331 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5334 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5335 transport and to the smtp transport in LMTP mode.
5337 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5339 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5340 run a filter in a subprocess. This could lead to confusion in subsequent
5341 lookups in the parent process. There should also be a search_tidyup() at
5342 the end of the subprocess.
5344 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5345 only if the host matched helo_try_verify_hosts, which caused the
5346 verification to occur when the EHLO/HELO command was issued. The ACL just
5347 tested the remembered result. Now, if a previous verification attempt has
5348 not happened, "verify = helo" does it there and then.
5350 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5352 TK/03 Fix log output including CR from clamd.
5354 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5355 exist provoked a memory error which could cause a segfault.
5357 PH/15 Installed PCRE 6.2
5359 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5361 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5362 of the problem. Specifically, suggested +O2 rather than +O1 for the
5365 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5367 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5368 record, the port was not correctly logged when the outgoing_port log
5369 selector was set (it logged the transort's default port).
5371 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5372 fallback_hosts, and "hosts" in the smtp transport.
5374 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5375 host errors such as "Connection refused".
5377 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5378 authentication with radiusclient 0.4.9:
5380 - Error returned from rc_read_config was caught wrongly
5381 - Username/password not passed on to radius server due to wrong length.
5383 The presumption is that some radiusclient API changes for 4.51/PH/17
5384 were not taken care of correctly. The code is still untested by me (my
5385 Linux distribution still has 0.3.2 of radiusclient), but it was
5386 contributed by a Radius user.
5388 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5389 expanding the "port" option of the smtp transport.
5391 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5392 while reading a MIME header. Thanks to Tom Hughes for a patch.
5394 PH/24 Include config.h inside local_scan.h so that configuration settings are
5397 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5398 that in an ACL for RCPT (for example), you can examine exactly what was
5401 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5402 commands, but it was not correctly comparing the address with the actual
5403 client host address. Thus, it would show the EHLO address in Received:
5404 header lines when this was not necessary.
5406 PH/27 Added the % operator to ${eval:}.
5408 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5409 it should be ignoring failures (because with -C, for example, it has lost
5410 privilege). It wasn't ignoring creation failures other than "already
5413 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5416 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5417 because an input line was too long, either on its own, or by virtue of
5418 too many continuations, the temporary file was not being removed, and the
5419 return code was incorrect.
5421 PH/31 Missing "BOOL" in function definition in filtertest.c.
5423 PH/32 Applied Sieve patches from the maintainer.
5425 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5427 PH/33 Added "verify = not_blind".
5429 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5430 Local/Makefile (with some defaults set). These are used in built scripts
5431 such as exicyclog, but they have never been used in the exim_install
5432 script (though there are many overriding facilities there). I have
5433 arranged that the exim_install script now takes note of these two
5436 PH/35 Installed configuration files for Dragonfly.
5438 PH/36 When a locally submitted message by a trusted user did not contain a
5439 From: header, and the sender address was obtained from -f or from an SMTP
5440 MAIL command, and the trusted user did not use -F to supply a sender
5441 name, $originator_name was incorrectly used when constructing a From:
5442 header. Furthermore, $originator_name was used for submission mode
5443 messages from external hosts without From: headers in a similar way,
5444 which is clearly wrong.
5446 PH/37 Added control=suppress_local_fixups.
5448 PH/38 When log_selector = +received_sender was set, and the addition of the
5449 sender made the log line's construction buffer exactly full, or one byte
5450 less than full, an overflow happened when the terminating "\n" was
5453 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5454 when the result of a list match is failure because a DNS lookup failed.
5456 PH/40 RM_COMMAND is now used in the building process.
5458 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5459 the "build-* directories that it finds.
5461 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5462 address in a domain literal was a prefix of an interface address.
5464 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5465 when verifying a sender address, unless rewrite_headers is false.
5467 PH/44 Wrote a long comment about why errors_to addresses are verified as
5468 recipients, not senders.
5470 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5471 the ratelimit ACL was added.
5473 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5475 PH/46 Added extra information about PostgreSQL errors to the error string.
5477 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5478 avoiding the need to install special zones in a real server. This is
5479 backwards compatible; if it can't find the fake resolver, it drops back.
5480 Thus, both old and new test suites can be run.
5482 TF/02 Added util/ratelimit.pl
5484 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5485 clock is set back in time.
5487 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5488 Candler <B.Candler@pobox.com>.
5490 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5491 OK for addresses that are the result of redirections.
5493 PH/48 A number of further additions for the benefit of the new test suite,
5494 including a fake gethostbyname() that interfaces to the fake DNS resolver
5497 TF/06 The fix for widen_domains has also been applied to qualify_single and
5498 search_parents which are the other dnslookup options that can cause
5501 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5504 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5506 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5507 service" if it encountered an MX record with an empty target hostname.
5508 The message is now "an MX or SRV record indicated no SMTP service".
5510 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5511 if the DNS of the sending site is misconfigured. This is quite a
5512 common situation. This change restores the behaviour of treating a
5513 helo verification defer as a failure.
5515 PH/51 If self=fail was set on a router, the bounce message did not include the
5516 actual error message.
5522 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5524 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5525 command itself ended in error, the underlying message about the transport
5526 filter timeout was being overwritten with the pipe command error. Now the
5527 underlying error message should be appended to the second error message.
5529 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5531 PH/02 Reduce the amount of output that "make" produces by default. Full output
5532 can still be requested.
5534 PH/03 The warning log line about a condition test deferring for a "warn" verb
5535 was being output only once per connection, rather than after each
5536 occurrence (because it was using the same function as for successful
5537 "warn" verbs). This seems wrong, so I have changed it.
5539 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5540 it should not have, which might have caused a crash in the right
5541 circumstances, but probably never did.
5543 PH/04 Installed a modified version of Tony Finch's patch to make submission
5544 mode fix the return path as well as the Sender: header line, and to
5545 add a /name= option so that you can make the user's friendly name appear
5548 TF/03 Added the control = fakedefer ACL modifier.
5550 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5551 Mark Lowes for thorough testing.
5553 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5555 TK/03 Merged latest SRS patch from Miles Wilton.
5557 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5558 with the definition in sysexits.h (which is #included earlier).
5559 Fortunately, Exim does not actually use EX_OK. The code used to try to
5560 preserve the sysexits.h value, by assuming that macro definitions were
5561 scanned for macro replacements. I have been disabused of this notion,
5562 so now the code just undefines EX_OK before #including unistd.h.
5564 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5565 in the smtp transport. When a block could not be written in a single
5566 write() function, the timeout was being re-applied to each part-write.
5567 This seems wrong - if the receiver was accepting one byte at a time it
5568 would take for ever. The timeout is now adjusted when this happens. It
5569 doesn't have to be particularly precise.
5571 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5572 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5574 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5575 without a domain if the check to <postmaster@domain> fails.
5577 SC/01 Eximstats: added -xls and the ability to specify output files
5578 (patch written by Frank Heydlauf).
5580 SC/02 Eximstats: use FileHandles for outputting results.
5582 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5584 SC/04 Eximstats: fixed display of large numbers with -nvr option
5586 SC/05 Eximstats: fixed merging of reports with empty tables.
5588 SC/06 Eximstats: added the -include_original_destination flag
5590 SC/07 Eximstats: removed tabs and trailing whitespace.
5592 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5594 TK/06 MBOX spool code: Add real "From " MBOX separator line
5595 so the .eml file is really in mbox format (even though
5596 most programs do not really care). Patch from Alex Miller.
5598 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5599 The latter is generated from $received_to and is only set if the
5600 message has one envelope recipient. SA can use these headers,
5601 obviously out-of-the-box. Patch from Alex Miller.
5603 PH/08 The ${def test on a variable was returning false if the variable's
5604 value was "0", contrary to what the specification has always said!
5605 The result should be true unless the variable is empty.
5607 PH/09 The syntax error of a character other than { following "${if
5608 def:variable_name" (after optional whitespace) was not being diagnosed.
5609 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5610 accidental colon was present, for example, could give incorrect results.
5612 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5613 result is used (not including appendfile, where other changes are about
5616 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5617 This involved changing a lot of size variables from int to off_t. It
5618 should work with maildirs and everything.
5620 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5621 spamd dying while we are connected to it.
5623 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5626 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5627 function for BDB 4.3.
5629 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5631 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5632 the sources for PCRE have been re-arranged and more files are now
5635 PH/15 The code I had for printing potentially long long variables in PH/11
5636 above was not the best (it lost precision). The length of off_t variables
5637 is now inspected at build time, and an appropriate printing format (%ld
5638 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5639 to be "long long int" or "long int". This is needed for the internal
5640 formatting function string_vformat().
5642 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5643 the configuration file to be ":syslog", then the script "guesses" where
5644 the logs files are, rather than using the compiled in default. In our
5645 case the guess is not the same as the compiled default, so the script
5646 suddenly stopped working when I started to use syslog. The patch checks
5647 to see if log_file_path is "". If so, it attempts to read it from exim
5648 with no configuration file to get the compiled in version, before it
5649 falls back to the previous guessing code."
5651 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5652 implementing BATV in an Exim configuration. See NewStuff for the gory
5655 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5656 Makefile that are specific to HP-UX.
5658 PH/18 If the "use_postmaster" option was set for a recipient callout together
5659 with the "random" option, the postmaster address was used as the MAIL
5660 FROM address for the random test, but not for the subsequent recipient
5661 test. It is now used for both.
5663 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5664 patch removes a few documentation additions to RFC 3028, because the
5665 latest draft now contains them. It adds the new en;ascii-case comparator
5666 and a new error check for 8bit text in MIME parts. Comparator and
5667 require names are now matched exactly. I enabled the subaddress
5668 extension, but it is not well tested yet (read: it works for me)."
5670 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5671 rework some of the code of TK/09 above to avoid the hardwired use of
5672 "%lld" and "long long". Replaced the call to snprintf() with a call to
5675 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5676 records point to non-existent hosts", "retry timeout exceeded", and
5677 "retry time not reached for any host after a long failure period".
5679 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5680 experimental DomainKeys support:
5682 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5683 (2) On an error such as an illegally used "control", the wrong name for
5684 the control was given.
5686 These problems did NOT occur unless DomainKeys support was compiled.
5688 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5690 PH/24 Added ${if match_ip condition.
5692 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5693 databases so that it will be absolutely obvious if a crash occurs in the
5694 DB library. This is a regular occurrence (often caused by mis-matched
5697 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5698 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5699 picked up on a user's system that detects such things. There doesn't seem
5700 to be a gcc warning option for this - only an attribute that has to be
5701 put on the function's prototype. It seems that in Fedora Core 4 they have
5702 set this on a number of new functions. No doubt there will be more in due
5705 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5706 specify a transport. However, if an address that was verified by such a
5707 router was the subject of a callout, Exim crashed because it tried to
5708 read the rcpt_include_affixes from the non-existent transport. Now it
5709 just assumes that the setting of that option is false. This bug was
5710 introduced by 4.51/PH/31.
5712 PH/28 Changed -d+all to exclude +memory, because that information is very
5713 rarely of interest, but it makes the output a lot bigger. People tend to
5714 do -d+all out of habit.
5716 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5717 code in os-type was giving problems when libc.so lives in lib64, like on
5720 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5721 aren't the modern standard, and it seems that some systems' include files
5722 don't always have them. Exim was already checking for some of the newer
5723 ones like T_AAAA, and defining it itself. I've added checks for all the
5724 record types that Exim uses.
5726 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5727 not automatically generating a new one, as it is supposed to. This
5728 prevented TLS from working. If the file did exist, but contained invalid
5729 data, a new version was generated, as expected. It was only the case of a
5730 non-existent file that was broken.
5732 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5733 with a change in libdomainkeys > 0.64.
5735 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5736 from DNS. If the selector record carries the flag, it now has
5737 precedence over the domain-wide flag.
5739 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5741 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5742 the use of a port name that isn't defined in /etc/services) occurred, the
5743 message was deferred as in a normal delivery, and thus remained on the
5744 spool, instead of being failed because of the mua_wrapper setting. This
5745 is now fixed, and I tidied up some of the mua_wrapper messages at the
5748 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5749 the messages in a hash of arrays rather than using individual hashes.
5750 This is a bit cleaner and results in dramatic memory savings, albeit
5751 at a slight CPU cost.
5753 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5754 as requested by Marc Sherman.
5756 SC/10 Eximstats: added histograms for user specified patterns as requested
5759 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5761 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5762 fopen() in the content-scanning modules that did not already have it.
5768 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5769 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5771 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5773 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5775 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5776 to test Sieve filters that use "vacation".
5778 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5779 that changes the way the GnuTLS parameters are stored in the cache file.
5780 The new format can be generated externally. For backward compatibility,
5781 if the data in the cache doesn't make sense, Exim assumes it has read an
5782 old-format file, and it generates new data and writes a new file. This
5783 means that you can't go back to an older release without removing the
5786 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5787 work if there are any delivery delays because "one_time" forces the
5788 parent to be marked "delivered", so its unseen clone is never tried
5789 again. For this reason, Exim now forbids the simultaneous setting of
5792 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5793 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5794 entry if you want to know the details. The fix, however, neglected to
5795 consider the case when local delivery batching is involved. The test for
5796 "previously delivered" was not happening when checking to see if an
5797 address could be batched with a previous (undelivered) one; under
5798 certain circumstances this could lead to multiple deliveries to the same
5801 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5802 in its include files, and this causes problems building Exim.
5804 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5805 header_syntax) but Exim was just ignoring anything given after a slash.
5806 In particular, this caused confusion with an attempt to use "verify =
5807 reverse_host_lookup/defer_ok". An error is now given when options are
5808 supplied for verify items that do not have them. (Maybe reverse_host_
5809 lookup should have a defer_ok option, but that's a different point.)
5811 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5812 defined by RFC 821) to 2048, because there were problems with some AUTH
5813 commands, and RFC 1869 says the size should be increased for extended
5814 SMTP commands that take arguments.
5816 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5819 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5820 "unknown" error; now it says that the functionality isn't in the binary.
5822 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5823 an address' error message when a string expansion fails (syntax or
5824 whatever). Otherwise the password may appear in the log. Following change
5825 PH/42 below, there is no longer a chance of it appearing in a bounce
5828 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5830 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5831 of its addresses was ever tried. (Bugzilla bug #2.)
5833 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5834 the result incorrectly in the debug output. (It correctly added a newline
5835 to what was transported.)
5837 TF/01 Added $received_time.
5839 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5840 commented out examples of how to interface to a virus scanner and to
5841 SpamAssassin. Also added commented examples of av_scanner and
5842 spamd_address settings.
5844 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5845 and controls are allowed in which ACLs. There were a couple of minor
5846 errors. Some of the entries in the conditions table (which is a table of
5847 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5848 negation of where the condition IS allowed.
5850 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5852 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5853 header file does not have a version number, so I've had to invent a new
5854 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5855 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5856 radiusclient), but it was contributed by a Radius user.
5858 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5859 files or directories, for OpenSSL.
5861 PH/19 When an Exim process that is running as root has to create an Exim log
5862 file, it does so in a subprocess that runs as exim:exim so as to get the
5863 ownership right at creation (otherwise, other Exim processes might see
5864 the file with the wrong ownership). There was no test for failure of this
5865 fork() call, which would lead to the process getting stuck as it waited
5866 for a non-existent subprocess. Forks do occasionally fail when resources
5867 run out. I reviewed all the other calls to fork(); they all seem to check
5870 PH/20 When checking for unexpected SMTP input at connect time (before writing
5871 the banner), Exim was not dealing correctly with a non-positive return
5872 from the read() function. If the client had disconnected by this time,
5873 the result was a log entry for a synchronization error with an empty
5874 string after "input=" when read() returned zero. If read() returned -1
5875 (an event I could not check), uninitialized data bytes were printed.
5876 There were reports of junk text (parts of files, etc) appearing after
5879 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5881 PH/22 Added support for macro redefinition, and (re)definition in between
5882 driver and ACL definitions.
5884 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5885 forgetting to use the resulting value; it was using the unexpanded value.
5887 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5888 hadn't been configured. The fix is from Juergen Kreileder, who
5889 understands it better than I do:
5891 "Here's what I see happening with three configured cyrus_sasl
5892 authenticators configured (plain, login, cram-md5):
5894 On startup auth_cyrus_sasl_init() gets called for each of these.
5895 This means three calls to sasl_listmech() without a specified mech_list.
5896 => SASL tests which mechs of all available mechs actually work
5897 => three warnings about OTP not working
5898 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5900 With the patch, sasl_listmech() also gets called three times. But now
5901 SASL's mech_list option is set to the server_mech specified in the the
5902 authenticator. Or in other words, the answer from sasl_listmech()
5903 gets limited to just the mech you're testing for (which is different
5905 => the return list contains just 'plain' or 'login', 'cram-md5' or
5906 nothing depending on the value of ob->server_mech.
5908 I've just tested the patch: Authentication still works fine,
5909 unavailable mechs specified in the exim configuration are still
5910 caught, and the auth.log warnings about OTP are gone."
5912 PH/25 When debugging is enabled, the contents of the command line are added
5913 to the debugging output, even when log_selector=+arguments is not
5916 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5917 answer is "GNU", and only if the return is "GNU/something" is the answer
5920 PH/27 $acl_verify_message is now set immediately after the failure of a
5921 verification in an ACL, and so is available in subsequent modifiers. In
5922 particular, the message can be preserved by coding like this:
5924 warn !verify = sender
5925 set acl_m0 = $acl_verify_message
5927 Previously, $acl_verify_message was set only while expanding "message"
5928 and "log_message" when a very denied access.
5930 PH/28 Modified OS/os.c-Linux with
5932 -#ifndef OS_LOAD_AVERAGE
5933 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5935 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5936 nomenclature these days.)
5938 PH/29 Installed patch from the Sieve maintainer that adds the options
5939 sieve_useraddress and sieve_subaddress to the redirect router.
5941 PH/30 In these circumstances:
5942 . Two addresses routed to the same list of hosts;
5943 . First host does not offer TLS;
5944 . First host accepts first address;
5945 . First host gives temporary error to second address;
5946 . Second host offers TLS and a TLS session is established;
5947 . Second host accepts second address.
5948 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5949 and peerdn, if requested) that were in fact used only for the second
5952 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5953 attention to any local part prefix or suffix that was matched by the
5954 router that accepted the address. It now behaves in the same way as it
5955 does for delivery: the affixes are removed from the local part unless
5956 rcpt_include_affixes is set on the transport.
5958 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5959 timeout during the DATA phase of an incoming message.
5961 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5962 applied a patch sanctioned by the Sieve maintainer.
5964 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5965 the uid or gid is negative. A case of a negative gid caused this to be
5966 noticed. The fix allows for either to be negative.
5968 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5969 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5972 PH/36 The change PH/12 above was broken. Fixed it.
5974 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5975 the grounds that routing the same address twice would always produce the
5976 same answer. This might have been true once, but it is certainly no
5977 longer true now. Routing a child address may depend on the previous
5978 routing that produced that child. Some complicated redirection strategies
5979 went wrong when messages had multiple recipients, and made Exim's
5980 behaviour dependent on the order in which the addresses were given.
5982 I have moved the duplicate checking until after the routing is complete.
5983 Exim scans the addresses that are assigned to local and remote
5984 transports, and removes any duplicates. This means that more work will be
5985 done, as duplicates will always all be routed, but duplicates are
5986 presumably rare, so I don't expect this is of any significance.
5988 For deliveries to pipes, files, and autoreplies, the duplicate checking
5989 still happens during the routing process, since they are not going to be
5992 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5993 It corrects a timeout issue with spamd. This is Ian's comment: "The
5994 background is that sometimes spamd either never reads data from a
5995 connection it has accepted, or it never writes response data. The exiscan
5996 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5997 blindly assumes that writes won't block so it may never time out."
5999 PH/39 Allow G after quota size as well as K and M.
6001 PH/40 The value set for $authenticated_id in an authenticator may not contain
6002 binary zeroes or newlines because the value is written to log lines and
6003 to spool files. There was no check on this. Now the value is run through
6004 the string_printing() function so that such characters are converted to
6005 printable escape sequences.
6007 PH/41 $message_linecount is a new variable that contains the total number of
6008 lines in the message. Compare $body_linecount, which is the count for the
6011 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6012 bounce and delay warning messages, except in certain special cases, which
6015 (a) An SMTP error message from a remote host;
6016 (b) A message specified in a :fail: redirection;
6017 (c) A message specified in a "fail" command in a system filter;
6018 (d) A message specified in a FAIL return from the queryprogram router;
6019 (e) A message specified by the cannot_route_message router option.
6021 In these cases only, Exim does include the error details in bounce and
6022 warning messages. There are also a few cases where bland messages such
6023 as "unrouteable address" or "local delivery error" are given.
6025 PH/43 $value is now also set for the "else" part of a ${run expansion.
6027 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6028 being worked on, but at least Exim now implements the latest version to
6031 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6032 process to complete was treated as a delivery failure, a timeout while
6033 writing the message to the pipe was logged, but erroneously treated as a
6034 successful delivery. Such timeouts include transport filter timeouts. For
6035 consistency with the overall process timeout, these timeouts are now
6036 treated as errors, giving rise to delivery failures by default. However,
6037 there is now a new Boolean option for the pipe transport called
6038 timeout_defer, which, if set TRUE, converts the failures into defers for
6039 both kinds of timeout. A transport filter timeout is now identified in
6042 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6043 systems where "make" and "gmake" are different, calling "gmake" at top
6044 level broke things. I've arranged for the value of $(MAKE) to be passed
6045 from the Makefile to this script so that it can call the same version of
6049 A note about Exim versions 4.44 and 4.50
6050 ----------------------------------------
6052 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6053 changes of various kinds. As a consequence, a big documentation update was
6054 needed. This delayed the release for rather longer than seemed good, especially
6055 in the light of a couple of (minor) security issues. Therefore, the changes
6056 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6057 release. So 4.44 and 4.50 are in effect two different branches that both start
6060 I have left the 4.50 change log unchanged; it contains all the changes since
6061 4.43. The change log for 4.44 is below; many of its items are identical to
6062 those for 4.50. This seems to be the most sensible way to preserve the
6063 historical information.
6069 1. Minor wording change to the doc/README.SIEVE file.
6071 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6072 computation of the current number of files was incorrect.
6074 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6075 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6078 4. Give more explanation in the error message when the command for a transport
6079 filter fails to execute.
6081 5. There are several places where Exim runs a non-Exim command in a
6082 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6083 was being done only for the command run by the queryprogram router. It is
6084 now done for all such subprocesses. The other cases are: ${run, transport
6085 filters, and the commands run by the lmtp and pipe transports.
6087 6. Added CONFIGURE_GROUP build-time option.
6089 7. Some older OS have a limit of 256 on the maximum number of file
6090 descriptors. Exim was using setrlimit() to set 1000 as a large value
6091 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6092 systems. I've change it so that if it can't get 1000, it tries for 256.
6094 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6095 was an oversight, and furthermore, ever since the addition of extra
6096 controls (e.g. 4.43/32), the checks on when to allow different forms of
6097 "control" were broken. There should now be diagnostics for all cases when a
6098 control that does not make sense is encountered.
6100 9. Added the /retain_sender option to "control=submission".
6102 10. $recipients is now available in the predata ACL (oversight).
6104 11. Tidy the search cache before the fork to do a delivery from a message
6105 received from the command line. Otherwise the child will trigger a lookup
6106 failure and thereby defer the delivery if it tries to use (for example) a
6107 cached ldap connection that the parent has called unbind on.
6109 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6110 of $address_data from the recipient verification was clobbered by the
6111 sender verification.
6113 13. The value of address_data from a sender verification is now available in
6114 $sender_address_data in subsequent conditions in the ACL statement.
6116 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6118 15. Added a new option "connect=<time>" to callout options, to set a different
6121 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6122 was its contents. (It was OK if the option was not defined at all.)
6124 17. A "Completed" log line is now written for messages that are removed from
6125 the spool by the -Mrm option.
6127 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6128 information about exactly what failed.
6130 19. Added -dd to debug only the daemon process.
6132 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6133 handles timeouts, both on the server side and network timeouts. Renamed the
6134 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6136 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6137 It is now set to "smtps".
6139 22. $host_address is now set to the target address during the checking of
6140 ignore_target_hosts.
6142 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6143 being passed; this would have caused $sender_host_name to have been used if
6144 matching the list had actually called for a host name (not very likely,
6145 since this list is usually IP addresses). A host name is now passed as
6148 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6149 code that specifies a non-restarting handler (typically sigaction() in
6150 modern systems) in an attempt to fix a rare and obscure crash bug.
6152 25. Narrowed the window for a race in the daemon that could cause it to ignore
6153 SIGCHLD signals. This is not a major problem, because they are used only to
6154 wake it up if nothing else does.
6156 26. A malformed maildirsize file could cause Exim to calculate negative values
6157 for the mailbox size or file count. Odd effects could occur as a result.
6158 The maildirsize information is now recalculated if the size or filecount
6161 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6162 support for a long time. Removed HAVE_SYS_VFS_H.
6164 28. Installed the latest version of exipick from John Jetmore.
6166 29. In an address list, if the pattern was not a regular expression, an empty
6167 subject address (from a bounce message) matched only if the pattern was an
6168 empty string. Non-empty patterns were not even tested. This was the wrong
6169 because it is perfectly reasonable to use an empty address as part of a
6170 database query. An empty address is now tested by patterns that are
6171 lookups. However, all the other forms of pattern expect the subject to
6172 contain a local part and a domain, and therefore, for them, an empty
6173 address still always fails if the pattern is not itself empty.
6175 30. Exim went into a mad DNS loop when attempting to do a callout where the
6176 host was specified on an smtp transport, and looking it up yielded more
6177 than one IP address.
6179 31. Re-factored the code for checking spool and log partition space into a
6180 function that finds that data and another that does the check. The former
6181 is then used to implement four new variables: $spool_space, $log_space,
6182 $spool_inodes, and $log_inodes.
6184 32. The RFC2047 encoding function was originally intended for short strings
6185 such as real names; it was not keeping to the 75-character limit for
6186 encoded words that the RFC imposes. It now respects the limit, and
6187 generates multiple encoded words if necessary. To be on the safe side, I
6188 have increased the buffer size for the ${rfc2047: expansion operator from
6191 33. It is now permitted to omit both strings after an "if" condition; if the
6192 condition is true, the result is "true". As before, when the second string
6193 is omitted, a false condition yields an empty string. This makes it less
6194 cumbersome to write custom ACL and router conditions.
6196 34. Failure to deliver a bounce message always caused it to be frozen, even if
6197 there was an errors_to setting on the router. The errors_to setting is now
6200 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6201 canonical form (fully expanded) before being placed in
6202 $sender_host_address.
6204 36. The table in the code that translates DNS record types into text (T_A to
6205 "A" for instance) was missing entries for NS and CNAME. It is just possible
6206 that this could have caused confusion if both these types were looked up
6207 for the same domain, because the text type is used as part of Exim's
6208 per-process caching. But the chance of anyone hitting this buglet seems
6211 37. The dnsdb lookup has been extended in a number of ways.
6213 (1) There is a new type, "zns", which walks up the domain tree until it
6214 finds some nameserver records. It should be used with care.
6216 (2) There is a new type, "mxh", which is like "mx" except that it returns
6217 just the host names, not the priorities.
6219 (3) It is now possible to give a list of domains (or IP addresses) to be
6220 looked up. The behaviour when one of the lookups defers can be
6221 controlled by a keyword.
6223 (4) It is now possible to specify the separator character for use when
6224 multiple records are returned.
6226 38. The dnslists ACL condition has been extended: it is now possible to supply
6227 a list of IP addresses and/or domains to be looked up in a particular DNS
6230 39. Added log_selector=+queue_time_overall.
6232 40. When running the queue in the test harness, wait just a tad after forking a
6233 delivery process, to get repeatability of debugging output.
6235 41. Include certificate and key file names in error message when GnuTLS fails
6236 to set them up, because the GnuTLS error message doesn't include the name
6237 of the failing file when there is a problem reading it.
6239 42. Allow both -bf and -bF in the same test run.
6241 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6243 44. The "Exiscan patch" is now merged into the mainline Exim source.
6245 45. Sometimes the final signoff response after QUIT could fail to get
6246 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6247 < 0 before doing a fflush(). This bug looks as though it goes back to the
6248 introduction of TLS in release 3.20, but "sometimes" must have been rare
6249 because the tests only now provoked it.
6251 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6252 (this can affect the format of dates).
6254 47. exim_tidydb, when checking for the continued existence of a message for
6255 which it has found a message-specific retry record, was not finding
6256 messages that were in split spool directories. Consequently, it was
6257 deleting retry records that should have stayed in existence.
6259 48. Steve fixed some bugs in eximstats.
6261 49. The SPA authentication driver was not abandoning authentication and moving
6262 on to the next authenticator when an expansion was forced to fail,
6263 contradicting the general specification for all authenticators. Instead it
6264 was generating a temporary error. It now behaves as specified.
6266 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6267 (the order specifies the preference for clients). The order is now AES256,
6268 AES128, 3DES, ARCFOUR128.
6270 51. Small patch to Sieve code - explicitly set From: when generating an
6273 52. Exim crashed if a remote delivery caused a very long error message to be
6274 recorded - for instance if somebody sent an entire SpamAssassin report back
6275 as a large number of 550 error lines. This bug was coincidentally fixed by
6276 increasing the size of one of Exim's internal buffers (big_buffer) that
6277 happened as part of the Exiscan merge. However, to be on the safe side, I
6278 have made the code more robust (and fixed the comments that describe what
6281 53. Now that there can be additional text after "Completed" in log lines (if
6282 the queue_time_overall log selector is set), a one-byte patch to exigrep
6283 was needed to allow it to recognize "Completed" as not the last thing in
6286 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6287 patch that reportedly fixes this has been added. I am not expert enough to
6288 create a test for it. This is what the patch creator wrote:
6290 "I found a little strange behaviour of ldap code when working with
6291 Windows 2003 AD Domain, where users was placed in more than one
6292 Organization Units. When I tried to give exim partial DN, the exit code
6293 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6294 But simultaneously result of request was absolutely normal ldap result,
6295 so I produce this patch..."
6297 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6298 REFERENCE, so I have modified the code to exclude the patch when that macro
6301 55. Some experimental protocols are using DNS PTR records for new purposes. The
6302 keys for these records are domain names, not reversed IP addresses. The
6303 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6304 leaves it alone. Component reversal etc. now happens only for IP addresses.
6307 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6309 57. Double the size of the debug message buffer (to 2048) so that more of very
6310 long debug lines gets shown.
6312 58. The exicyclog utility now does better if the number of log files to keep
6313 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6315 59. Two changes related to the smtp_active_hostname option:
6317 (1) $smtp_active_hostname is now available as a variable.
6318 (2) The default for smtp_banner uses $smtp_active_hostname instead
6319 of $primary_hostname.
6321 60. The host_aton() function is supposed to be passed a string that is known
6322 to be a valid IP address. However, in the case of IPv6 addresses, it was
6323 not checking this. This is a hostage to fortune. Exim now panics and dies
6324 if the condition is not met. A case was found where this could be provoked
6325 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6326 components; fortuitously, this particular loophole had already been fixed
6327 by change 4.50/55 above.
6329 If there are any other similar loopholes, the new check in host_aton()
6330 itself should stop them being exploited. The report I received stated that
6331 data on the command line could provoke the exploit when Exim was running as
6332 exim, but did not say which command line option was involved. All I could
6333 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6334 running as the user.
6337 61. There was a buffer overflow vulnerability in the SPA authentication code
6338 (which came originally from the Samba project). I have added a test to the
6339 spa_base64_to_bits() function which I hope fixes it.
6342 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6343 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6345 63. The daemon start-up calls getloadavg() while still root for those OS that
6346 need the first call to be done as root, but it missed one case: when
6347 deliver_queue_load_max is set with deliver_drop_privilege. This is
6348 necessary for the benefit of the queue runner, because there is no re-exec
6349 when deliver_drop_privilege is set.
6351 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6352 This has been fixed.
6354 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6355 was in use, was not putting the data itself into the right store pool;
6356 consequently, it could be overwritten for a subsequent message in the same
6357 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6360 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6362 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6363 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6364 the function were treating the return as a boolean value, which happened to
6365 work because 0=false and not-0=true, but is not correct code.
6367 68. The host_aton() function was not handling scoped IPv6 addresses (those
6368 with, for example, "%eth0" on the end) correctly.
6370 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6371 negated items (that is, ~something) in unsigned ints. Some compilers
6372 apparently mutter when there is no cast.
6374 70. If an address verification called from an ACL failed, and did not produce a
6375 user-specific message (i.e. there was only a "system" message), nothing was
6376 put in $acl_verify_message. In this situation, it now puts the system
6379 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6380 session; change 4.31/43 added the unwanted input to the log line - except
6381 that it did not do this in the start of session case. It now does.
6383 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6384 This is wrong and can cause the other end to generate a synchronization
6385 error if it is another Exim or anything else that does the synchronization
6386 check. A QUIT command is no longer sent after a timeout.
6388 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6389 during host lookups.
6391 74. The defer_ok option of callout verification was not working if it was used
6392 when verifying addresses in header lines, that is, for this case:
6394 verify = header_sender/callout=defer_ok
6396 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6397 those file descriptors could be used for SMTP connections. If anything
6398 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6399 could be sent to the SMTP client, causing chaos. The daemon now opens
6400 stdin, stdout, and stderr to /dev/null when it puts itself into the
6403 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6404 log by default. The user can override this with suitable Perl magic.
6406 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6407 the log message when discard triggers, was not working for the DATA ACL or
6408 for the non-SMTP ACL.
6410 78. Error message wording change in sieve.c.
6412 79. If smtp_accept_max_per_host was set, the number of connections could be
6413 restricted to fewer than expected, because the daemon was trying to set up
6414 a new connection before checking whether the processes handling previous
6415 connections had finished. The check for completed processes is now done
6416 earlier. On busy systems, this bug wouldn't be noticed because something
6417 else would have woken the daemon, and it would have reaped the completed
6420 80. If a message was submitted locally by a user whose login name contained one
6421 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6422 It caused a spool format error. I have fixed the spool reading code. A
6423 related problem was that the "from" clause in the Received: line became
6424 illegal because of the space(s). It is now covered by ${quote_local_part.
6426 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6429 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6431 83. Patch from Sieve maintainer to fix unterminated string problem in
6432 "vacation" handling.
6434 84. Some minor changes to the Linux configuration files to help with other
6435 OS variants using glibc.
6437 85. One more patch for Sieve to update vacation handling to latest spec.
6440 ----------------------------------------------------
6441 See the note above about the 4.44 and 4.50 releases.
6442 ----------------------------------------------------
6448 1. Change 4.43/35 introduced a bug that caused file counts to be
6449 incorrectly computed when quota_filecount was set in an appendfile
6452 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6453 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6456 3. Give more explanation in the error message when the command for a transport
6457 filter fails to execute.
6459 4. There are several places where Exim runs a non-Exim command in a
6460 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6461 was being done only for the command run by the queryprogram router. It is
6462 now done for all such subprocesses. The other cases are: ${run, transport
6463 filters, and the commands run by the lmtp and pipe transports.
6465 5. Some older OS have a limit of 256 on the maximum number of file
6466 descriptors. Exim was using setrlimit() to set 1000 as a large value
6467 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6468 systems. I've change it so that if it can't get 1000, it tries for 256.
6470 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6471 was an oversight, and furthermore, ever since the addition of extra
6472 controls (e.g. 4.43/32), the checks on when to allow different forms of
6473 "control" were broken. There should now be diagnostics for all cases when a
6474 control that does not make sense is encountered.
6476 7. $recipients is now available in the predata ACL (oversight).
6478 8. Tidy the search cache before the fork to do a delivery from a message
6479 received from the command line. Otherwise the child will trigger a lookup
6480 failure and thereby defer the delivery if it tries to use (for example) a
6481 cached ldap connection that the parent has called unbind on.
6483 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6484 of $address_data from the recipient verification was clobbered by the
6485 sender verification.
6487 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6488 was its contents. (It was OK if the option was not defined at all.)
6490 11. A "Completed" log line is now written for messages that are removed from
6491 the spool by the -Mrm option.
6493 12. $host_address is now set to the target address during the checking of
6494 ignore_target_hosts.
6496 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6497 being passed; this would have caused $sender_host_name to have been used if
6498 matching the list had actually called for a host name (not very likely,
6499 since this list is usually IP addresses). A host name is now passed as
6502 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6503 code that specifies a non-restarting handler (typically sigaction() in
6504 modern systems) in an attempt to fix a rare and obscure crash bug.
6506 15. Narrowed the window for a race in the daemon that could cause it to ignore
6507 SIGCHLD signals. This is not a major problem, because they are used only to
6508 wake it up if nothing else does.
6510 16. A malformed maildirsize file could cause Exim to calculate negative values
6511 for the mailbox size or file count. Odd effects could occur as a result.
6512 The maildirsize information is now recalculated if the size or filecount
6515 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6516 support for a long time. Removed HAVE_SYS_VFS_H.
6518 18. Updated exipick to current release from John Jetmore.
6520 19. Allow an empty sender to be matched against a lookup in an address list.
6521 Previously the only cases considered were a regular expression, or an
6524 20. Exim went into a mad DNS lookup loop when doing a callout where the
6525 host was specified on the transport, if the DNS lookup yielded more than
6528 21. The RFC2047 encoding function was originally intended for short strings
6529 such as real names; it was not keeping to the 75-character limit for
6530 encoded words that the RFC imposes. It now respects the limit, and
6531 generates multiple encoded words if necessary. To be on the safe side, I
6532 have increased the buffer size for the ${rfc2047: expansion operator from
6535 22. Failure to deliver a bounce message always caused it to be frozen, even if
6536 there was an errors_to setting on the router. The errors_to setting is now
6539 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6540 canonical form (fully expanded) before being placed in
6541 $sender_host_address.
6543 24. Updated eximstats to version 1.33
6545 25. Include certificate and key file names in error message when GnuTLS fails
6546 to set them up, because the GnuTLS error message doesn't include the name
6547 of the failing file when there is a problem reading it.
6549 26. Expand error message when OpenSSL has problems setting up cert/key files.
6552 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6553 (this can affect the format of dates).
6555 28. exim_tidydb, when checking for the continued existence of a message for
6556 which it has found a message-specific retry record, was not finding
6557 messages that were in split spool directories. Consequently, it was
6558 deleting retry records that should have stayed in existence.
6560 29. eximstats updated to version 1.35
6561 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6562 1.35 - bugfix such that pie charts by volume are generated correctly
6564 30. The SPA authentication driver was not abandoning authentication and moving
6565 on to the next authenticator when an expansion was forced to fail,
6566 contradicting the general specification for all authenticators. Instead it
6567 was generating a temporary error. It now behaves as specified.
6569 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6570 (the order specifies the preference for clients). The order is now AES256,
6571 AES128, 3DES, ARCFOUR128.
6573 31. Small patch to Sieve code - explicitly set From: when generating an
6576 32. Exim crashed if a remote delivery caused a very long error message to be
6577 recorded - for instance if somebody sent an entire SpamAssassin report back
6578 as a large number of 550 error lines. This bug was coincidentally fixed by
6579 increasing the size of one of Exim's internal buffers (big_buffer) that
6580 happened as part of the Exiscan merge. However, to be on the safe side, I
6581 have made the code more robust (and fixed the comments that describe what
6584 33. Some experimental protocols are using DNS PTR records for new purposes. The
6585 keys for these records are domain names, not reversed IP addresses. The
6586 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6587 leaves it alone. Component reversal etc. now happens only for IP addresses.
6590 34. The host_aton() function is supposed to be passed a string that is known
6591 to be a valid IP address. However, in the case of IPv6 addresses, it was
6592 not checking this. This is a hostage to fortune. Exim now panics and dies
6593 if the condition is not met. A case was found where this could be provoked
6594 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6595 components; fortuitously, this particular loophole had already been fixed
6596 by change 4.50/55 or 4.44/33 above.
6598 If there are any other similar loopholes, the new check in host_aton()
6599 itself should stop them being exploited. The report I received stated that
6600 data on the command line could provoke the exploit when Exim was running as
6601 exim, but did not say which command line option was involved. All I could
6602 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6603 running as the user.
6606 35. There was a buffer overflow vulnerability in the SPA authentication code
6607 (which came originally from the Samba project). I have added a test to the
6608 spa_base64_to_bits() function which I hope fixes it.
6611 36. The daemon start-up calls getloadavg() while still root for those OS that
6612 need the first call to be done as root, but it missed one case: when
6613 deliver_queue_load_max is set with deliver_drop_privilege. This is
6614 necessary for the benefit of the queue runner, because there is no re-exec
6615 when deliver_drop_privilege is set.
6617 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6618 was in use, was not putting the data itself into the right store pool;
6619 consequently, it could be overwritten for a subsequent message in the same
6620 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6623 38. Sometimes the final signoff response after QUIT could fail to get
6624 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6625 < 0 before doing a fflush(). This bug looks as though it goes back to the
6626 introduction of TLS in release 3.20, but "sometimes" must have been rare
6627 because the tests only now provoked it.
6633 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6634 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6635 Now it returns an integer. A number of calls were still expecting a T/F
6636 return. Fortuitously, in all cases, the tests worked in OK situations,
6637 which is the norm. However, things would have gone wrong on any write
6638 failures on the smtp file descriptor. This function is used when sending
6639 messages over SMTP and also when doing verify callouts.
6641 2. When Exim is called to do synchronous delivery of a locally submitted
6642 message (the -odf or -odi options), it no longer closes stderr before doing
6645 3. Implemented the mua_wrapper option.
6647 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6649 5. Implemented the functions header_remove(), header_testname(),
6650 header_add_at_position(), and receive_remove_recipient(), and exported them
6653 6. If an ACL "warn" statement specified the addition of headers, Exim already
6654 inserted X-ACL-Warn: at the start if there was no header name. However, it
6655 was not making this test for the second and subsequent header lines if
6656 there were newlines in the string. This meant that an invalid header could
6657 be inserted if Exim was badly configured.
6659 7. Allow an ACL "warn" statement to add header lines at the start or after all
6660 the Received: headers, as well as at the end.
6662 8. Added the rcpt_4xx retry error code.
6664 9. Added postmaster_mailfrom=xxx to callout verification option.
6666 10. Added mailfrom=xxxx to the callout verification option, for verify=
6669 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6670 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6672 12. Inserted some casts to stop certain compilers warning when using pointer
6673 differences as field lengths or precisions in printf-type calls (mostly
6674 affecting debugging statements).
6676 13. Added optional readline() support for -be (dynamically loaded).
6678 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6679 same clock tick as a message's arrival, so that its received time was the
6680 same as the "first fail" time on the retry record, and that message
6681 remained on the queue past the ultimate address timeout, every queue runner
6682 would try a delivery (because it was past the ultimate address timeout) but
6683 after another failure, the ultimate address timeout, which should have then
6684 bounced the address, did not kick in. This was a "< instead of <=" error;
6685 in most cases the first failure would have been in the next clock tick
6686 after the received time, and all would be well.
6688 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6689 being recognized when the domain list was tested by the match_domain
6690 condition in an expansion string.
6692 16. Added the ${str2b64: operator.
6694 17. Exim was always calling setrlimit() to set a large limit for the number of
6695 processes, without checking whether the existing limit was already
6696 adequate. (It did check for the limit on file descriptors.) Furthermore,
6697 errors from getrlimit() and setrlimit() were being ignored. Now they are
6698 logged to the main and panic logs, but Exim does carry on, to try to do its
6699 job under whatever limits there are.
6701 18. Imported PCRE 5.0.
6703 19. Trivial typo in log message " temporarily refused connection" (the leading
6706 20. If the log selector return_path_on_delivery was set and an address was
6707 redirected to /dev/null, the delivery process crashed because it assumed
6708 that a return path would always be set for a "successful" delivery. In this
6709 case, the whole delivery is bypassed as an optimization, and therefore no
6712 21. Internal re-arrangement: the function for sending a challenge and reading
6713 a response while authentication was assuming a zero-terminated challenge
6714 string. It's now changed to take a pointer and a length, to allow for
6715 binary data in such strings.
6717 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6719 23. Exim was not respecting finduser_retries when seeking the login of the
6720 uid under which it was called; it was always trying 10 times. (The default
6721 setting of finduser_retries is zero.) Also, it was sleeping after the final
6722 failure, which is pointless.
6724 24. Implemented tls_on_connect_ports.
6726 25. Implemented acl_smtp_predata.
6728 26. If the domain in control=submission is set empty, Exim assumes that the
6729 authenticated id is a complete email address when it generates From: or
6730 Sender: header lines.
6732 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6733 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6734 chown and chgrp in /bin and hostname in /usr/bin.
6736 28. Exim was keeping the "process log" file open after each use, just as it
6737 does for the main log. This opens the possibility of it remaining open for
6738 long periods when the USR1 signal hits a daemon. Occasional processlog
6739 errors were reported, that could have been caused by this. Anyway, it seems
6740 much more sensible not to leave this file open at all, so that is what now
6743 29. The long-running daemon process does not normally write to the log once it
6744 has entered its main loop, and it closes the log before doing so. This is
6745 so that log files can straightforwardly be renamed and moved. However,
6746 there are a couple of unusual error situations where the daemon does write
6747 log entries, and I had neglected to close the log afterwards.
6749 30. The text of an SMTP error response that was received during a remote
6750 delivery was being truncated at 512 bytes. This is too short for some of
6751 the long messages that one sometimes sees. I've increased the limit to
6754 31. It is now possible to make retry rules that apply only when a message has a
6755 specific sender, in particular, an empty sender.
6757 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6758 it possible to be selective about when SMTP synchronization is enforced.
6760 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6762 32. Implemented hosts_connection_nolog.
6764 33. Added an ACL for QUIT.
6766 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6769 35. Added mailbox_size and mailbox_filecount to appendfile.
6771 36. Added control = no_multiline_responses to ACLs.
6773 37. There was a bug in the logic of the code that waits for the clock to tick
6774 in the case where the clock went backwards by a substantial amount such
6775 that the microsecond fraction of "now" was more than the microsecond
6776 fraction of "then" (but the whole seconds number was less).
6778 38. Added support for the libradius Radius client library this is found on
6779 FreeBSD (previously only the radiusclient library was supported).
6785 1. When certain lookups returned multiple values in the form name=value, the
6786 quoting of the values was not always being done properly. Specifically:
6787 (a) If the value started with a double quote, but contained no whitespace,
6789 (b) If the value contained whitespace other than a space character (i.e.
6790 tabs or newlines or carriage returns) it was not quoted.
6791 This fix has been applied to the mysql and pgsql lookups by writing a
6792 separate quoting function and calling it from the lookup code. The fix
6793 should probably also be applied to nisplus, ibase and oracle lookups, but
6794 since I cannot test any of those, I have not disturbed their existing code.
6796 2. A hit in the callout cache for a specific address caused a log line with no
6797 reason for rejecting RCPT. Now it says "Previous (cached) callout
6798 verification failure".
6800 3. There was an off-by-one bug in the queryprogram router. An over-long
6801 return line was truncated at 256 instead of 255 characters, thereby
6802 overflowing its buffer with the terminating zero. As well as fixing this, I
6803 have increased the buffer size to 1024 (and made a note to document this).
6805 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6806 when Exim is waiting for an SMTP response from a remote server, Exim
6807 restarts its select() call on the socket, thereby resetting its timeout.
6808 This is not a problem when such interrupts are rare. Somebody set up a cron
6809 job to run exiwhat every 2 minutes, which is less than the normal select()
6810 timeout (5 or 10 minutes). This meant that the select() timeout never
6811 kicked in because it was always reset. I have fixed this by comparing the
6812 time when an interrupt arrives with the time at the start of the first call
6813 to select(). If more time than the timeout has elapsed, the interrupt is
6814 treated as a timeout.
6816 5. Some internal re-factoring in preparation for the addition of Sieve
6817 extensions (by MH). In particular, the "personal" test is moved to a
6818 separate function, and given an option for scanning Cc: and Bcc: (which is
6819 not set for Exim filters).
6821 6. When Exim created an email address using the login of the caller as the
6822 local part (e.g. when creating a From: or Sender: header line), it was not
6823 quoting the local part when it contained special characters such as @.
6825 7. Installed new OpenBSD configuration files.
6827 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6828 try to make them clearer.
6830 9. Callout options, other than the timeout value, were being ignored when
6831 verifying sender addresses in header lines. For example, when using
6833 verify = header_sender/callout=no_cache
6835 the cache was (incorrectly) being used.
6837 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6838 only the Cygwin environment.
6840 11. When return_path_on_delivery was set as a log selector, if different remote
6841 addresses in the same message used different return paths and parallel
6842 remote delivery occurred, the wrong values would sometimes be logged.
6843 (Whenever a remote delivery process finished, the return path value from
6844 the most recently started remote delivery process was logged.)
6846 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6847 lines when AUTH and/or TLS are in use. This is the "received protocol"
6848 field. Exim used to use "asmtp" for authenticated SMTP, without any
6849 indication (in the protocol name) for TLS use. Now it follows the RFC and
6850 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6851 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6852 names appear in log lines as well as in Received: header lines.
6854 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6855 extensions, and comparison tests, and to fix some bugs.
6857 14. Changes to the "personal" filter test:
6859 (1) The test was buggy in that it was just doing the equivalent of
6860 "contains" tests on header lines. For example, if a user's address was
6861 anne@some.where, the "personal" test would incorrectly be true for
6863 To: susanne@some.where
6865 This test is now done by extracting each address from the header in turn,
6866 and checking the entire address. Other tests that are part of "personal"
6867 are now done using regular expressions (for example, to check local parts
6868 of addresses in From: header lines).
6870 (2) The list of non-personal local parts in From: addresses has been
6871 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6872 taken from the Sieve specification recommendations.
6874 (3) If the message contains any header line starting with "List-" it is
6875 treated as non-personal.
6877 (4) The test for "circular" in the Subject: header line has been removed
6878 because it now seems ill-conceived.
6880 15. Minor typos in src/EDITME comments corrected.
6882 16. Installed latest exipick from John Jetmore.
6884 17. If headers_add on a router specified a text string that was too long for
6885 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6886 of string_sprintf() is now avoided.
6888 18. $message_body_size was not set (it was always zero) when running the DATA
6889 ACL and the local_scan() function.
6891 19. For the "mail" command in an Exim filter, no default was being set for
6892 the once_repeat time, causing a random time value to be used if "once" was
6893 specified. (If the value happened to be <= 0, no repeat happened.) The
6894 default is now 0s, meaning "never repeat". The "vacation" command was OK
6895 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6896 (I found it when inspecting the code).
6898 20. There is now an overall timeout for performing a callout verification. It
6899 defaults to 4 times the callout timeout, which applies to individual SMTP
6900 commands during the callout. The overall timeout applies when there is more
6901 than one host that can be tried. The timeout is checked before trying the
6902 next host. This prevents very long delays if there are a large number of
6903 hosts and all are timing out (e.g. when the network connections are timing
6904 out). The value of the overall timeout can be changed by specifying an
6905 additional sub-option for "callout", called "maxwait". For example:
6907 verify = sender/callout=5s,maxwait=20s
6909 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6910 to the end before writing, but this should make it even safer).
6912 22. Exim was forgetting that it had advertised PIPELINING for the second and
6913 subsequent messages on an SMTP connection. It was also not resetting its
6914 memory on STARTTLS and an internal HELO.
6916 23. When Exim logs an SMTP synchronization error within a session, it now
6917 records whether PIPELINING has been advertised or not.
6919 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6920 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6921 rather than long int.
6923 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6925 26. Added the never_mail option to autoreply.
6931 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6932 crash if the getsockname() call failed; this can happen if a connection is
6933 closed very soon after it is established. The problem was simply in the
6934 order in which certain operations were done, causing Exim to try to write
6935 to the SMTP stream before it had set up the file descriptor. The bug has
6936 been fixed by making things happen in the correct order.
6942 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6943 before the connection was closed, thus losing the rejection response.
6945 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6946 some early Solaris releases, but causes trouble in current releases where
6947 socklen_t is defined.
6949 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6952 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6955 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6956 that releasing the top of it at the end releases what was used for sub-
6957 expansions (unless the block got too big). However, discard this block if
6958 the first thing is a variable or header, so that we can use its block when
6959 it is dynamic (useful for very large $message_headers, for example).
6961 6. Lookups now cache *every* query, not just the most recent. A new, separate
6962 store pool is used for this. It can be recovered when all lookup caches are
6963 flushed. Lookups now release memory at the end of their result strings.
6964 This has involved some general refactoring of the lookup sources.
6966 7. Some code has been added to the store_xxx() functions to reduce the amount
6967 of flapping under certain conditions.
6969 8. log_incoming_interface used to affect only the <= reception log lines. Now
6970 it causes the local interface and port to be added to several more SMTP log
6971 lines, for example "SMTP connection from", and rejection lines.
6973 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6975 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6977 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6978 could be overwritten at the end of the current message (or the start of a
6979 new message if it was set in a HELO ACL). The value is now preserved for
6980 the duration of the SMTP connection.
6982 12. If a transport had a headers_rewrite setting, and a matching header line
6983 contained an unqualified address, that address was qualified, even if it
6984 did not match any rewriting rules. The underlying bug was that the values
6985 of the flags that permit the existence of unqualified sender and recipient
6986 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6987 non-local messages, and by -bnq for local messages) were not being
6988 preserved with the message after it was received.
6990 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6991 "next input=" as part of the text comprising the host identity instead of
6992 the correct text. The code was using the same buffer for two different
6993 strings. However, depending on which order the printing function evaluated
6994 its arguments, the bug did not always show up. Under Linux, for example, my
6995 test suite worked just fine.
6997 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6998 doesn't work with some older versions of Perl. It has been changed to "my",
6999 which in any case is probably the better facility to use.
7001 15. A really picky compiler found some instances of statements for creating
7002 error messages that either had too many or two few arguments for the format
7005 16. The size of the buffer for calls to the DNS resolver has been increased
7006 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
7007 for addresses that have a lot of PTR records. This alleviates a problem; it
7008 does not fully solve it.
7010 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7011 buffer now truncates the list and logs the incident, which is the same
7012 action as happens when Exim is looking up a host name and its aliases.
7013 Previously in this situation something unpredictable would happen;
7014 sometimes it was "internal error: store_reset failed".
7016 18. If a server dropped the connection unexpectedly when an Exim client was
7017 using GnuTLS and trying to read a response, the client delivery process
7018 crashed while trying to generate an error log message.
7020 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7021 string, for example:
7023 warn message = H1: something\nH2: something
7025 the text was added as a single header line from Exim's point of view
7026 though it ended up OK in the delivered message. However, searching for the
7027 second and subsequent header lines using $h_h2: did not work. This has been
7028 fixed. Similarly, if a system filter added multiple headers in this way,
7029 the routers could not see them.
7031 20. Expanded the error message when iplsearch is called with an invalid key to
7032 suggest using net-iplsearch in a host list.
7034 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7035 ACLs are no longer actually imposed (and a message to that effect is
7038 22. If a "gecos" field in a passwd entry contained escaped characters, in
7039 particular, if it contained a \" sequence, Exim got it wrong when building
7040 a From: or a Sender: header from that name. A second bug also caused
7041 incorrect handling when an unquoted " was present following a character
7042 that needed quoting.
7044 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7045 was not being matched caselessly.
7047 24. Arranged for all hyphens in the exim.8 source to be escaped with
7050 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7051 properly. Recipient callout cache records were still being keyed to include
7052 the sender, even when use_sender was set false. This led to far more
7053 callouts that were necessary. The sender is no longer included in the key
7054 when use_sender is false.
7056 26. Added "control = submission" modifier to ACLs.
7058 27. Added the ${base62d: operator to decode base 62 numbers.
7060 28. dnsdb lookups can now access SRV records.
7062 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7063 the configuration file.
7065 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7066 (-v) mode. This makes the output for a verbose queue run more intelligible.
7068 31. Added a use_postmaster feature to recipient callouts.
7070 32. Added the $body_zerocount variable, containing the number of binary zero
7071 bytes in the message body.
7073 33. The time of last modification of the "new" subdirectory is now used as the
7074 "mailbox time last read" when there is a quota error for a maildir
7077 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7079 35. Added +ignore_unknown as a special item in host lists.
7081 36. Code for decoding IPv6 addresses in host lists is now included, even if
7082 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7083 address was recognized as an IP address, but was then not correctly decoded
7084 into binary, causing unexpected and incorrect effects when compared with
7091 1. Very minor rewording of debugging text in manualroute to say "list of
7092 hosts" instead of "hostlist".
7094 2. If verify=header_syntax was set, and a header line with an unqualified
7095 address (no domain) and a large number of spaces between the end of the
7096 name and the colon was received, the reception process suffered a buffer
7097 overflow, and (when I tested it) crashed. This was caused by some obsolete
7098 code that should have been removed. The fix is to remove it!
7100 3. When running in the test harness, delay a bit after writing a bounce
7101 message to get a bit more predictability in the log output.
7103 4. Added a call to search_tidyup() just before forking a reception process. In
7104 theory, someone could use a lookup in the expansion of smtp_accept_max_
7105 per_host which, without the tidyup, could leave open a database connection.
7107 5. Added the variables $recipient_data and $sender_data which get set from a
7108 lookup success in an ACL "recipients" or "senders" condition, or a router
7109 "senders" option, similar to $domain_data and $local_part_data.
7111 6. Moved the writing of debug_print from before to after the "senders" test
7114 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7115 problems for message scanning, either using a data ACL, or using
7116 local_scan() because the Received: header was not generated till after they
7117 were called (in order to set the time as the time of reception completion).
7118 I have revised the way this works. The header is now generated after the
7119 body is received, but before the ACL or local_scan() are called. After they
7120 are run, the timestamp in the header is updated.
7126 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7127 before starting a queue runner without re-exec. This happened only when
7128 deliver_drop_privilege was set or when the Exim user was set to root. The
7129 effect of the bug was that timeouts during subsequent deliveries caused
7130 crashes instead of being properly handled. The handler is now left at its
7131 default (and expected) setting.
7133 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7134 message, again when deliver_drop_privilege is set or Exim is run as root.
7135 The bug described in (1) was not present in this case, but the tidying up
7136 of the other signals was missing. I have made the two cases consistent.
7138 3. The ignore_target_hosts setting on a manualroute router was being ignored
7139 for hosts that were looked up using the /MX notation.
7141 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7144 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7145 operated on the sender address. After changing the $sender_address to <>
7146 for the sender address verify, Exim was re-instated it as the original
7147 (before rewriting) address, but remembering that it had rewritten it, so it
7148 wasn't rewriting it again. This bug also had the effect of breaking the
7149 sender address verification caching when the sender address was rewritten.
7151 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7152 This has been changed so that if the ip literal address matches
7153 ignore_target_hosts, the router declines.
7155 7. Added expansion conditions match_domain, match_address, and match_local_
7156 part (NOT match_host).
7158 8. The placeholder for the Received: header didn't have a length field set.
7160 9. Added code to Exim itself and to exim_lock to test for a specific race
7161 condition that could lead to file corruption when using MBX delivery. The
7162 issue is with the lockfile that is created in /tmp. If this file is removed
7163 after a process has opened it but before that process has acquired a lock,
7164 there is the potential for a second process to recreate the file and also
7165 acquire a lock. This could lead to two Exim processes writing to the file
7166 at the same time. The added code performs the same test as UW imapd; it
7167 checks after acquiring the lock that its file descriptor still refers to
7168 the same named file.
7170 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7171 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7174 11. Added the smtp_active_hostname option. If used, this will typically be made
7175 to depend on the incoming interface address. Because $interface_address is
7176 not set up until the daemon has forked a reception process, error responses
7177 that can happen earlier (such as "too many connections") no longer contain
7180 12. If an expansion in a condition on a "warn" statement fails because a lookup
7181 defers, the "warn" statement is abandoned, and the next ACL statement is
7182 processed. Previously this caused the whole ACL to be aborted.
7184 13. Added the iplsearch lookup type.
7186 14. Added ident_timeout as a log selector.
7188 15. Added tls_certificate_verified as a log selector.
7190 16. Added a global option tls_require_ciphers (compare the smtp transport
7191 option of the same name). This controls incoming TLS connections.
7193 17. I finally figured out how to make tls_require_ciphers do a similar thing
7194 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7195 before starting the TLS session.
7197 18. Tabs are now shown as \t in -bP output.
7199 19. If the log selector return_path_on_delivery was set, Exim crashed when
7200 bouncing a message because it had too many Received: header lines.
7202 20. If two routers both had headers_remove settings, and the first one included
7203 a superfluous trailing colon, the final name in the first list and the
7204 first name in the second list were incorrectly joined into one item (with a
7205 colon in the middle).
7211 1. Added -C and -D options to the exinext utility, mainly to make it easier
7212 to include in the automated testing, but these could be helpful when
7213 multiple configurations are in use.
7215 2. The exinext utility was not formatting the output nicely when there was
7216 an alternate port involved in the retry record key, nor when there was a
7217 message id as well (for retries that were specific to a specific message
7218 and a specific host). It was also confused by IPv6 addresses, because of
7219 the additional colons they contain. I have fixed the IPv4 problem, and
7220 patched it up to do a reasonable job for IPv6.
7222 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7223 delivery, the log line now contains "pipelined" if PIPELINING was used.
7225 4. An SMTP transport process used to panic and die if the bind() call to set
7226 an explicit outgoing interface failed. This has been changed; it is now
7227 treated in the same way as a connect() failure.
7229 5. A reference to $sender_host_name in the part of a conditional expansion
7230 that was being skipped was still causing a DNS lookup. This no longer
7233 6. The def: expansion condition was not recognizing references to header lines
7234 that used bh_ and bheader_.
7236 7. Added the _cache feature to named lists.
7238 8. The code for checking quota_filecount in the appendfile transport was
7239 allowing one more file than it should have been.
7241 9. For compatibility with Sendmail, the command line option
7249 and sets the incoming protocol and host name (for trusted callers). The
7250 host name and its colon can be omitted when only the protocol is to be set.
7251 Note the Exim already has two private options, -pd and -ps, that refer to
7252 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7253 "s", but I don't think that's a major issue.
7255 10. A number of refactoring changes to the code, none of which should affect
7258 (a) The number of logging options was getting close to filling up the
7259 32-bit word that was used as a bit map. I have split them into two classes:
7260 those that are passed in the argument to log_write(), and those that are
7261 only ever tested independently outside of that function. These are now in
7262 separate 32-bit words, so there is plenty of room for expansion again.
7263 There is no change in the user interface or the logging behaviour.
7265 (b) When building, for example, log lines, the code previously used a
7266 macro that called string_cat() twice, in order to add two strings. This is
7267 not really sufficiently general. Furthermore, there was one instance where
7268 it was actually wrong because one of the argument was used twice, and in
7269 one call a function was used. (As it happened, calling the function twice
7270 did not affect the overall behaviour.) The macro has been replaced by a
7271 function that can join an arbitrary number of extra strings onto a growing
7274 (c) The code for expansion conditions now uses a table and a binary chop
7275 instead of a serial search (which was left over from when there were very
7276 few conditions). Also, it now recognizes conditions like "pam" even when
7277 the relevant support is not compiled in: a suitably worded error message is
7278 given if an attempt is made to use such a condition.
7280 11. Added ${time_interval:xxxxx}.
7282 12. A bug was causing one of the ddress fields not to be passed back correctly
7283 from remote delivery subprocesses. The field in question was not being
7284 subsequently used, so this caused to problems in practice.
7286 13. Added new log selectors queue_time and deliver_time.
7288 14. Might have fixed a bug in maildirsizefile handling that threw up
7289 "unexpected character" debug warnings, and recalculated the data
7290 unnecessarily. In any case, I expanded the warning message to give more
7293 15. Added the message "Restricted characters in address" to the statements in
7294 the default ACL that block characters like @ and % in local parts.
7296 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7297 Three changes have been made:
7299 (a) There was a serious bug; a negative response to MAIL caused the whole
7300 recipient domain to be cached as invalid, thereby blocking all messages
7301 to all local parts at the same domain, from all senders. This bug has
7302 been fixed. The domain is no longer cached after a negative response to
7303 MAIL if the sender used is not empty.
7305 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7308 (c) A new callout option, "use_sender" has been added for people who want
7309 the modified behaviour.
7315 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7318 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7319 indeed breaks things for older releases.
7321 3. Added additional logging to the case where there is a problem reading data
7322 from a filter that is running in a subprocess using a pipe, in order to
7323 try to track down a specific problem.
7325 4. Testing facility fudge: when running in the test harness and attempting
7326 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7327 getting "No route to host". Convert this to a timeout.
7329 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7332 6. Some OS don't have socklen_t but use size_t instead. This affects the
7333 fifth argument of getsockopt() amongst other things. This is now
7334 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7335 can be set for individual OS. I have set it for SunOS5, OSF1, and
7336 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7337 some earlier ones do not.
7339 7. Change 4.30/15 was not doing the test caselessly.
7341 8. The standard form for an IPv6 address literal was being rejected by address
7342 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7343 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7344 this, as well as the form without the "IPv6" on the front (but only when
7345 address literals are enabled, of course).
7347 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7349 10. Exim crashed if a message with an empty sender address specified by -f
7350 encountered a router with an errors_to setting. This could be provoked only
7351 by a command such as
7355 where an empty string was supplied; "<>" did not hit this bug.
7357 11. Installed PCRE release 4.5.
7359 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7360 remained set. It is now erased.
7362 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7363 times from message ids (which are base 36 rather than the normal 62).
7365 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7366 were being counted as actual protocol errors, and logged if the log
7367 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7368 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7369 and DATA following a set of rejected RCPTs do not count as protocol errors.
7370 In other words, Exim assumes they were pipelined, though this may not
7371 actually be the case. Of course, in all cases the client gets an
7372 appropriate error code.
7374 15. If a lookup fails in an ACL condition, a message about the failure may
7375 be available; it is used if testing the ACL cannot continue, because most
7376 such messages specify what the cause of the deferral is. However, some
7377 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7378 that caused an old message to be retained and used if a later statement
7379 caused a defer, replacing the real cause of the deferral.
7381 16. If an IP address had so many PTR records that the DNS lookup buffer
7382 was not large enough to hold them, Exim could crash while trying to process
7383 the truncated data. It now detects and logs this case.
7385 17. Further to 4.21/58, another change has been made: if (and only if) the
7386 first line of a message (the first header line) ends with CRLF, a bare LF
7387 in a subsequent header line has a space inserted after it, so as not to
7388 terminate the header.
7390 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7391 unnecessarily, used atoi() instead of strtol(), and didn't check the
7392 termination when getting file sizes from file names by regex.
7394 19. Completely re-implemented the support for maildirsize files, in the light
7395 of a number of problems with the previous contributed implementation
7396 (4.30/29). In particular:
7398 . If the quota is zero, the maildirsize file is maintained, but no quota is
7401 . If the maildir directory does not exist, it is created before any attempt
7402 to write a maildirsize file.
7404 . The quota value in the file is just a cache; if the quota is changed in
7405 the transport, the new value overrides.
7407 . A regular expression is available for excluding directories from the
7410 20. The autoreply transport checks the characters in options that define the
7411 message's headers; it allows continued headers, but it was checking with
7412 isspace() after an embedded newline instead of explicitly looking for a
7415 21. If all the "regular" hosts to which an address was routed had passed their
7416 expiry times, and had not reached their retry times, the address was
7417 bounced, even if fallback hosts were defined. Now Exim should go on to try
7420 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7421 equivalent code in the SMTP transport. Some hosts send humungous responses
7422 to HELO/EHLO, more than 1024 it seems.
7424 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7425 gives compiler warnings in some environments. I've now done it "properly",
7428 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7429 (because of problems with the built-in one) was declared to return uschar *
7430 instead of char *, causing compiler failure.
7432 25. Fixed a file descriptor leak when processing alias/forward files.
7434 26. Fixed a minor format string issue in dbfn.c.
7436 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7438 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7439 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7442 29. When a sender address is verified, it is cached, to save repeating the test
7443 when there is more than one recipient in a message. However, when the
7444 verification involves a callout, it is possible for different callout
7445 options to be set for different recipients. It is too complicated to keep
7446 track of this in the cache, so now Exim always runs a verification when a
7447 callout is required, relying on the callout cache for the optimization.
7448 The overhead is duplication of the address routing, but this should not be
7451 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7452 to be verified with callout=postmaster, and the main callout worked but the
7453 postmaster check failed, the verification correctly failed. However, if a
7454 subsequent RCPT command asked for sender verification *without* the
7455 postmaster check, incorrect caching caused this verification also to fail,
7458 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7459 it was not caching the DNS options (qualify_single, search_parents) that
7460 were used when the lookup failed. A subsequent lookup with different
7461 options therefore always gave the same answer, though there were cases
7462 where it should not have. (Example: a "domains = !$mx_any" option on a
7463 dnslookup router: the "domains" option is always processed without any
7464 widening, but the router might have qualify_single set.) Now Exim uses the
7465 cached value only when the same options are set.
7467 32. Added John Jetmore's "exipick" utility to the distribution.
7469 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7470 than a timeout (e.g. a certificate is required, and is not provided), an
7471 Exim server now closes the connection immediately. Previously it waited for
7472 the client to close - but if the client is SSL, it seems that they each
7473 wait for each other, leading to a delay before one of them times out.
7475 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7476 maintained 0.8.x compatibility because I don't think many are using it, and
7477 it is clearly obsolete.
7479 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7482 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7483 client certificate was expired. A simple patch fixes this, though I don't
7484 understand the full logic of why the verify callback is called multiple
7487 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7488 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7489 which causes problems with some clients (such as the Certicom SSL Plus
7490 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7491 disables the coutermeasure allowing Eudora to connect."
7493 38. Exim was not checking that a write() to a log file succeeded. This could
7494 lead to Bad Things if a log got too big, in particular if it hit a file
7495 size limit. Exim now panics and dies if it cannot write to a log file, just
7496 as it does if it cannot open a log file.
7498 39. Modified OS/Makefile-Linux so that it now contains
7500 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7502 The two -D definitions ensure that Exim is compiled with large file
7503 support, which makes it possible to handle log files that are bigger than
7506 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7507 instance) a domain was checked against a named list that involved a lookup,
7508 causing $domain_data to be set, then another domain was checked against the
7509 same list, then the first domain was re-checked, the value of $domain_data
7510 after the final check could be wrong. In particular, if the second check
7511 failed, it could be set empty. This bug probably also applied to
7514 41. The strip_trailing_dot option was not being applied to the address given
7515 with the -f command-line option.
7517 42. The code for reading a message's header from the spool was incrementing
7518 $received_count, but never initializing it. This meant that the value was
7519 incorrect (doubled) while delivering a message in the same process in which
7520 it was received. In the most common configuration of Exim, this never
7521 happens - a fresh exec is done - but it can happen when
7522 deliver_drop_privilege is set.
7524 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7525 it now includes up to 150 characters of the unexpected data in the log
7528 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7529 and building data strings. The size of both of these buffers was 10 000
7530 bytes - far larger than anybody would *ever* want, thought I. Needless to
7531 say, somebody hit the limit. I have increased the maximum line length to
7532 20 000 and the maximum data length of concatenated lines to 100 000. I have
7533 also fixed two bugs, because there was no checking on these buffers. Tsk,
7534 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7535 buffer is too small.
7537 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7538 lsearch lookups. Now it does.
7540 46. When parsing a route_list item in a manualroute router, a fixed-length
7541 buffer was used for the list of hosts. I made this 1024 bytes long,
7542 thinking that nobody would ever have a list of hosts that long. Wrong.
7543 Somebody had a whole pile of complicated expansion conditions, and the
7544 string was silently truncated, leading to an expansion error. It turns out
7545 that it is easier to change to an unlimited length (owing to other changes
7546 that have happened since this code was originally written) than to build
7547 structure for giving a limitation error. The length of the item that
7548 expands into the list of hosts is now unlimited.
7550 47. The lsearch lookup could not handle data where the length of text line was
7551 more than 4095 characters. Such lines were truncated, leading to shortened
7552 data being returned. It should now handle lines of any length.
7554 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7555 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7558 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7559 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7560 no longer happens in comment lines. A list of replacements is now placed
7561 at the head of all of the source files, except those whose only change is
7562 to replace PERL_COMMAND in the very first #! line.
7564 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7565 messages on the queue, with a bottom-up merge sort, using code contributed
7566 by Michael Haardt. This should make operations like -bp somewhat faster on
7567 large queues. It won't affect queue runners, except when queue_run_in_order
7570 51. Installed eximstats 1.31 in the distribution.
7572 52. Added support for SRV lookups to the dnslookup router.
7574 53. If an ACL referred to $message_body or $message_body_end, the value was not
7575 reset for any messages that followed in the same SMTP session.
7577 54. The store-handling optimization for building very long strings was not
7578 differentiating between the different store pools. I don't think this
7579 actually made any difference in practice, but I've tidied it.
7581 55. While running the routers to verify a sender address, $sender_address
7582 was still set to the sender address. This is wrong, because when routing to
7583 send a bounce to the sender, it would be empty. Therefore, I have changed
7584 it so that, while verifying a sender address, $sender_address is set to <>.
7585 (There is no change to what happens when verifying a recipient address.)
7587 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7588 target A or AAAA records (if not already returned) without resetting the
7589 qualify_single or search_parents options of the DNS resolver. These are
7590 inappropriate in this case because the targets of MX and SRV records must
7591 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7592 target that, when qualified, matched something in the local domain. These
7593 two options are now turned off when doing these lookups.
7595 57. It seems that at least some releases of Reiserfs (which does not have the
7596 concept of a fixed number of inodes) returns zero and not -1 for the
7597 number of available inodes. This interacted badly with check_spool_inodes,
7598 which assumed that -1 was the "no such thing" setting. What I have done is
7599 to check that the total number of inodes is greater than zero before doing
7600 the test of how many are available.
7602 58. When a "warn" ACL statement has a log_message modifier, the message is
7603 remembered, and not repeated. This is to avoid a lot of repetition when a
7604 message has many recipients that cause the same warning to be written.
7605 However, Exim was preserving the list of already written lines for an
7606 entire SMTP session, which doesn't seem right. The memory is now reset if a
7607 new message is started.
7609 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7610 debugging output unless log_rewrite was also set.
7612 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7613 of (int)(handle) when we know that handle contains (void *)(-1).
7615 61. The Exim daemon panic-logs an error return when it closes the incoming
7616 connection. However "connection reset by peer" seems to be common, and
7617 isn't really an error worthy of noting specially, so that particular error
7620 62. When Exim is trying to find all the local interfaces, it used to panic and
7621 die if the ioctl to get the interface flags failed. However, it seems that
7622 on at least one OS (Solaris 9) it is possible to have an interface that is
7623 included in the list of interfaces, but for which you get a failure error
7624 for this call. This happens when the interface is not "plumbed" into a
7625 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7626 failure of the "get flags" call assumes that the interface is down.
7628 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7629 makes life easier for people who are doing arithmetic on fields extracted
7630 from dates, where you often get leading zeros that should not be
7631 interpreted as octal.
7633 64. Added qualify_domain to the redirect router, to override the global
7636 65. If a pathologically long header line contained very many addresses (the
7637 report of this problem mentioned 10 000) and each of them was rewritten,
7638 Exim could use up a very large amount of memory. (It kept on making new
7639 copies of the header line as it rewrote, and never released the old ones.)
7640 At the expense of a bit more processing, the header rewriting function has
7641 been changed so that it no longer eats memory in this way.
7643 66. The generation of the Received: header has been moved from the time that a
7644 message starts to be received, to the time that it finishes. The timestamp
7645 in the Received: header should now be very close to that of the <= log
7646 line. There are two side-effects of this change:
7648 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7649 logged header lines no longer include the local Received: line, because
7650 it has not yet been created. The same applies to a copy of the message
7651 that is returned to a non-SMTP sender when a message is rejected.
7653 (b) When a filter file is tested using -bf, no additional Received: header
7654 is added to the test message. After some thought, I decided that this
7657 This change does not affect the value of $received_for. It is still set
7658 after address rewriting, but before local_scan() is called.
7660 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7662 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7663 gave an unhelpful panic error message, and a defer error. I have managed to
7664 change this behaviour so that it now rejects any supplied certificate,
7665 which seems right, as the list of acceptable certificates is empty.
7667 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7668 gave an unhelpful defer error. I have not managed to make this reject any
7669 supplied certificates, but the error message it gives is "no certificate
7670 supplied", which is not helpful.
7672 70. exigrep's output now also includes lines that are not associated with any
7673 message, but which match the given pattern. Implemented by a patch from
7674 Martin Sluka, which also tidied up the Perl a bit.
7676 71. Recipient callout verification, like sender verification, was using <> in
7677 the MAIL FROM command. This isn't really the right thing, since the actual
7678 sender may affect whether the remote host accepts the recipient or not. I
7679 have changed it to use the actual sender in the callout; this means that
7680 the cache record is now keyed on a recipient/sender pair, not just the
7681 recipient address. There doesn't seem to be a real danger of callout loops,
7682 since a callout by the remote host to check the sender would use <>.
7683 [SEE ABOVE: changed after hitting problems.]
7685 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7686 temporary errors. However, in the case of such a code being given after
7687 the end of a data transmission (i.e. after ".") Exim was failing to write
7688 a retry record for the message. (Yes, there was some broken host that was
7689 actually sending 8xx at this point.)
7691 73. An unknown lookup type in a host list could cause Exim to panic-die when
7692 the list was checked. (An example that provoked this was putting <; in the
7693 middle of a list instead of at the start.) If this happened during a DATA
7694 ACL check, a -D file could be left lying around. This kind of configuration
7695 error no longer causes Exim to die; instead it causes a defer error. The
7696 incident is still logged to the main and panic logs.
7698 74. Buglet left over from Exim 3 conversion. The message "too many messages
7699 in one connection" was written to the rejectlog but not the mainlog, except
7700 when address rewriting (yes!) was being logged.
7702 75. Added write_rejectlog option.
7704 76. When a system filter was run not as root (that is, when system_filter_user
7705 was set), the values of the $n variables were not being returned to the
7706 main process; thus, they were not subsequently available in the $sn
7709 77. Added +return_path_on_delivery log selector.
7711 78. A connection timeout was being treated differently from recipients deferred
7712 when testing hosts_max_try with a message that was older than the host's
7713 retry timeout. (The host should not be counted, thus allowing all hosts to
7714 be tried at least once before bouncing.) This may have been the cause of an
7715 occasionally reported bug whereby a message would remain on the queue
7716 longer than the retry timeout, but would be bounced if a delivery was
7717 forced. I say "may" because I never totally pinned down the problem;
7718 setting up timeout/retry tests is difficult. See also the next item.
7720 79. The ultimate address timeout was not being applied to errors that involved
7721 a combination of host plus message (for example, a timeout on a MAIL
7722 command). When an address resolved to a number of possible hosts, and they
7723 were not all tried for each delivery (e.g. because of hosts_max_try), a
7724 message could remain on the queue longer than the retry timeout.
7726 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7729 81. Fixed an obscure SMTP outgoing bug which required at least the following
7730 conditions: (a) there was another message waiting for the same server;
7731 (b) the server returned 5xx to all RCPT commands in the first message so
7732 that the message was not completed; (c) the server dropped the connection
7733 or gave a negative response to the RSET that Exim sends to abort the
7734 transaction. The observed case was a dropped connection after DATA that had
7735 been sent in pipelining mode. That is, the server had advertised PIPELINING
7736 but was not implementing it correctly. The effect of the bug was incorrect
7737 behaviour, such as trying another host, and this could lead to a crash.
7743 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7744 and daemon.c were passed as pointers to ints; they should have been
7745 pointers to socklen_t variables (which are typically unsigned ints).
7747 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7750 3. Fixed a really odd bug that affected only the testing scheme; patching a
7751 certain fixed string in the binary changed the value of another string that
7752 happened to be identical to the end of the original first string.
7754 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7755 name", it returns that address as the IP address. On some operating
7756 systems (e.g. Solaris), it also passes back the IP address string as the
7757 "host name". However, on others (e.g. Linux), it passes back an empty
7758 string. Exim wasn't checking for this, and was changing the host name to an
7759 empty string, assuming it had been canonicalized.
7761 5. Although rare, it is permitted to have more than one PTR record for a given
7762 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7763 all the names associated with an address, because they do in Solaris.
7764 However, it seems that they do not in Linux for data that comes from the
7765 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7766 I found this out when I moved to a new Linux workstation and tried to run
7767 the Exim test suite.
7769 To get round this problem I have changed the code so that it now does its
7770 own call to the DNS to look up PTR records when searching for a host name.
7771 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7772 addresses that are only in /etc/hosts are still found.
7774 This behaviour is, however, controlled by an option called host_lookup_
7775 order, which defaults to "bydns:byaddr". If people want to use the other
7776 order, or indeed, just use one or the other means of lookup, they can
7777 specify it in this variable.
7779 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7780 some operating systems, this comes back from gethostbyaddr() as an empty
7781 string, and this is what Exim used to test for. However, it seems that in
7782 other systems, "." is yielded. Exim now tests for this case too.
7784 7. The values of check_spool_space and check_log_space are now held internally
7785 as a number of kilobytes instead of an absolute number of bytes. If a
7786 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7787 kilobyte. This means that much larger values can be stored.
7789 8. Exim monitor: an attempt to get the action menu when not actually pointing
7790 at a message produces an empty menu entitled "No message selected". This
7791 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7792 no entries in it ("Shell widget menu has zero width and/or height"). So I
7793 have added a single, blank menu entry in this case.
7795 9. Added ${quote_local_part.
7797 10. MIME decoding is now applied to the contents of Subject: header lines when
7800 11. Now that a reference to $sender_host_address automatically causes a reverse
7801 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7802 host lookup before query-style lookups in lists that might use this
7803 variable. This has therefore been abolished, and the "net-" prefix is no
7804 longer necessary for query-style lookups.
7806 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7807 have been a typo for LFLAGS, so it has been changed.
7809 13. The install script calls Exim with "-C /dev/null" in order to find the
7810 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7811 to be output. However, since Exim outputs its version number before the
7812 error, it didn't break the script. It just looked ugly. I fixed this by
7813 always allowing "-C /dev/null" if the caller is root.
7815 14. Ignore overlarge ACL variable number when reading spool file - insurance
7816 against a later release with more variables having written the file.
7818 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7819 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7820 this, as well as the form without the "IPv6" on the front.
7822 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7823 OS/Makefile-Darwin file.
7825 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7826 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7828 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7829 variable. However, some OS use ints for inodes. I've added cast to long int
7830 to get rid of the compiler warning.
7832 19. I had forgotten to lock out "/../" in configuration file names when
7833 ALT_CONFIG_PREFIX was set.
7835 20. Routers used for verification do not need to specify transports. However,
7836 if such a router generated a host list, and callout was configured, Exim
7837 crashed, because it could not find a port number from the (non-existent)
7838 transport. It now assumes port 25 in this circumstance.
7840 21. Added the -t option to exigrep.
7842 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7843 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7844 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7845 them is set, LOOKUP_LSEARCH is forced.
7847 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7849 24. Added sender and host information to the "rejected by local_scan()" log
7850 line; previously there was no indication of these.
7852 25. Added .include_if_exists.
7854 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7855 Linux. It turns out that not all file systems support this. Apparently some
7856 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7857 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7858 not supported on the file descriptor, is now ignored when Exim is trying to
7859 sync a directory. This applies only to Linux.
7861 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7863 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7864 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7867 29. Added support for maildirsize files from supplied patch (modified a bit).
7869 30. The use of :fail: followed by an empty string could lead Exim to respond to
7870 sender verification failures with (e.g.):
7872 550 Verification failed for <xxx>
7873 550 Sender verify failed
7875 where the first response line was missing the '-' that indicates it is not
7876 the final line of the response.
7878 31. The loop for finding the name of the user that called Exim had a hardwired
7879 limit of 10; it now uses the value of finduser_retries, which is used for
7880 all other user lookups.
7882 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7885 33. Exim was neglecting to zero errno before one call of strtol() when
7886 expanding a string and expecting an integer value. On some systems this
7887 resulted in spurious "integer overflow" errors. Also, it was casting the
7888 result into an int without checking.
7890 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7891 did not work. The code looks as if it has *never* worked, though it appears
7892 to have been documented since at least release 1.62. I have made it work.
7894 35. The "timeout_DNS" error in retry rules, also documented since at least
7895 1.62, also never worked. As it isn't clear exactly what this means, and
7896 clearly it isn't a major issue, I have abolished the feature by treating it
7897 as "timeout", and writing a warning to the main and panic logs.
7899 36. The display of retry rules for -brt wasn't always showing the error code
7902 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7903 timeout_connect_A, timeout_connect_MX.
7905 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7906 to the empty sender.
7908 39. The daemon was not analysing the content of -oX till after it had closed
7909 stderr and disconnected from the controlling terminal. This meant that any
7910 syntax errors were only noted on the panic log, and the return code from
7911 the command was 0. By re-arranging the code a little, I've made the
7912 decoding happen first, so such errors now appear on stderr, and the return
7913 code is 1. However, the actual setting up of the sockets still happens in
7914 the disconnected process, so errors there are still only recorded on the
7917 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7918 connections (as happens on some IP stacks) was logged at start up time as
7919 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7920 it from "IPv6 and IPv4", which means that two separate sockets are being
7923 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7924 says whether AF_INET or AF_INET6 was passed as an argument.
7926 42. Exiwhat output was messed up when time zones were included in log
7929 43. Exiwhat now gives more information about the daemon's listening ports,
7930 and whether -tls-on-connect was used.
7932 44. The "port" option of the smtp transport is now expanded.
7934 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7935 silently ignored. Now an error message is written to the main and panic
7938 46. There's a new ACL modifier called "logwrite" which writes to a log file
7939 as soon as it is encountered.
7941 47. Added $local_user_uid and $local_user_gid at routing time.
7943 48. Exim crashed when trying to verify a sender address that was being
7946 49. Exim was recognizing only a space character after ".include". It now also
7947 recognizes a tab character.
7949 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7950 extracting the relevant information from the specification. The man page no
7951 longer contains scrambled data for the -d option, and I've added a section
7952 at the front about calling Exim under different names.
7954 51. Added "extra_headers" argument to the "mail" command in filter files.
7956 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7959 53. Installed eximstats 1.29.
7961 54. Added transport_filter_timeout as a generic transport option.
7963 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7964 Cc: header lines. This was required by RFC 822, but it not required by RFC
7967 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7968 incoming messages that did not have them. Now it does so only if the
7969 message originates locally, that is, if there is no associated remote host
7970 address. When Resent- header lines are present, this applies to the Resent-
7971 lines rather than the non-Resent- lines.
7973 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7974 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7976 58. Messages for configuration errors now include the name of the main
7977 configuration file - useful now that there may be more than one file in a
7978 list (.included file names were always shown).
7980 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7981 for those rare installations that do not start the daemon as root or run it
7982 setuid root. I've cut out the call to initgroups() if the daemon is not
7985 60. The Exim user and group can now be bound into the binary as text strings
7986 that are looked up at the start of Exim's processing.
7988 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7990 62. Added $mailstore_basename variable.
7992 63. Installed patch to sieve.c from Michael Haardt.
7994 64. When Exim failed to open the panic log after failing to open the main log,
7995 the original message it was trying to log was written to stderr and debug
7996 output, but if they were not available (the usual case in production), it
7997 was lost. Now it is written to syslog before the two lines that record the
7998 failures to open the logs.
8000 65. Users' Exim filters run in subprocesses under the user's uid. It is
8001 possible for a "deliver" command or an alias in a "personal" command to
8002 provoke an address rewrite. If logging of address rewriting is configured,
8003 this fails because the process is not running as root or exim. There may be
8004 a better way of dealing with this, but for the moment (because 4.30 needs
8005 to be released), I have disabled address rewrite logging when running a
8006 filter in a non-root, non-exim process.
8012 1. The buildconfig auxiliary program wasn't quoting the value set for
8013 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8014 not defined. This bug was masked in 4.22 by the effect that was fixed in
8017 2. Some messages that were rejected after a message id was allocated were
8018 shown as "incomplete" by exigrep. It no longer does this for messages that
8019 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8021 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8022 have allow_domain_literals set, the ID did not get logged in the <= line.
8023 Domain literals are now always recognized in Message-ID: header lines.
8025 4. The first argument for a ${extract expansion item is the key name or field
8026 number. Leading and trailing spaces in this item were not being ignored,
8027 causing some misleading effects.
8029 5. When deliver_drop_privilege was set, single queue runner processes started
8030 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8031 same command in the process it spins off) were not dropping privilege.
8033 6. When the daemon running as "exim" started a queue runner, it always
8034 re-executed Exim in the spun-off process. This is a waste of effort when
8035 deliver_drop_privilege is set. The new process now just calls the
8036 queue-runner function directly.
8042 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8045 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8046 ignored. Though the use of -oP was forcing the writing of a pid file, it
8047 was always written to the default place.
8049 3. If the message "no IP address found for host xxxx" is generated during
8050 incoming verification, it is now followed by identification of the incoming
8051 connection (so you can more easily find what provoked it).
8053 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8055 5. Added some features to "harden" Exim a bit more against certain attacks:
8057 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8058 be put in Local/Makefile. This is like the never_users runtime option,
8059 but it cannot be overridden. The default setting is "root".
8061 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8062 prefix string with which any file named in a -C command line option
8065 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8066 is retained for -C and -D only if the caller of Exim is root. Without
8067 it, the exim user may also use -C and -D and retain privilege.
8069 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8070 command line option is disabled.
8072 6. Macro names set by the -D option must start with an upper case letter, just
8073 like macro names defined in the configuration file.
8075 7. Added "dereference=" facility to LDAP.
8077 8. Two instances of the typo "uknown" in the source files are fixed.
8079 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8080 the Configure-Makefile script screwed up while processing it.
8082 10. Incorporated PCRE 4.4.
8084 11. The SMTP synchronization check was not operating right at the start of an
8085 SMTP session. For example, it could not catch a HELO sent before the client
8086 waited for the greeting. There is now a check for outstanding input at the
8087 point when the greeting is written. Because of the duplex, asynchronous
8088 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8089 way, but not yet received, when the check is performed.
8091 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8092 on TCP/IP sockets, because this apparently causes some broken clients to
8095 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8096 unchanged) from the Cygwin maintainer.
8098 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8099 was supported instead of testing for mbx. Effectively a typo.
8101 15. The spa authenticator server code was not checking that the input it
8102 received was valid base64.
8104 16. The debug output line for the "set" modifier in ACLs was not showing the
8105 name of the variable that was being set.
8107 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8109 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8110 lookup on its own. Something else was needed to trigger the lookup. For
8111 example, a match in host_lookup or the need for a host name in a host list.
8112 Now, if $sender_host_name is referenced and the host name has not yet been
8113 looked up, a lookup is performed. If the lookup fails, the variable remains
8114 empty, and $host_lookup_failed is set to "1".
8116 19. Added "eqi" as a case-independent comparison operator.
8118 20. The saslauthd authentication condition could segfault if neither service
8119 nor realm was specified.
8121 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8122 error message that was logged was misleading, and incoming SMTP
8123 connections were dropped. The message is now more accurate, and temporary
8124 errors are given to SMTP connections.
8126 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8127 (except RSET) with a 421 error, until QUIT is received. However, it was
8128 failing to send a response to QUIT.
8130 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8131 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8132 ACL is now run after the helo_try_verify_hosts code.
8134 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8135 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8136 case-independent, so other case variants are also recognized). Apparently
8137 some systems use these upper case variants.
8139 25. If more than two messages were waiting for the same host, and a transport
8140 filter was specified for the transport, Exim sent two messages over the
8141 same TCP/IP connection, and then failed with "socket operation on non-
8142 socket" when it tried to send the third.
8144 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8146 27. The extern definition of crypt16() in expand.c was not being excluded when
8147 the OS had its own crypt16() function.
8149 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8150 as a preferred synonym for return_size_limit, both as an option and as an
8153 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8155 30. Changed the default configuration ACL to relax the local part checking rule
8156 for addresses that are not in any local domains. For these addresses,
8157 slashes and pipe symbols are allowed within local parts, but the sequence
8158 /../ is explicitly forbidden.
8160 31. SPA server authentication was not clearing the challenge buffer before
8163 32. log_message in a "warn" ACL statement was writing to the reject log as
8164 well as to the main log, which contradicts the documentation and doesn't
8165 seem right (because no rejection is happening). So I have stopped it.
8167 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8168 However, I am unable to do any testing of this.
8170 34. Fixed an infelicity in the appendfile transport. When checking directories
8171 for a mailbox, to see if any needed to be created, it was accidentally
8172 using path names with one or more superfluous leading slashes; tracing
8173 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8175 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8176 contents are added to the log line that is written for every discarded
8177 recipient. (Previously a log_message setting was ignored.)
8179 36. The ${quote: operator now quotes the string if it is empty.
8181 37. The install script runs exim in order to find its version number. If for
8182 some reason other than non-existence or emptiness, which it checks, it
8183 could not run './exim', it was installing it with an empty version number,
8184 i.e. as "exim-". This error state is now caught, and the installation is
8187 38. An argument was missing from the function that creates an error message
8188 when Exim fails to connect to the socket for saslauthd authentication.
8189 This could cause Exim to crash, or give a corrupted message.
8191 39. Added isip, isip4, and isip6 to ${if conditions.
8193 40. The ACL variables $acl_xx are now saved with the message, and can be
8194 accessed later in routers, transports, and filters.
8196 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8197 strings in the file are not string-expanded.
8199 42. If a MAIL command specified a SIZE value that was too large to fit into an
8200 int variable, the check against message_size_limit failed. Such values are
8201 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8202 day this will have to be increased, but I don't think I want to be around
8203 when emails are that large.
8210 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8211 iconv() is not standard in FreeBSD.
8213 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8214 IPv6 enabled. The observed symptom was a segmentation fault on return from
8215 the function os_common_find_running_interfaces() in src/os.c.
8217 3. In the check_special_case() function in daemon.c I had used "errno" as an
8218 argument name, which causes warnings on some systems. This was basically a
8219 typo, since it was named "eno" in the comments!
8221 4. The code that waits for the clock to tick (at a resolution of some fraction
8222 of a second) so as to ensure message-id uniqueness was always waiting for
8223 at least one whole tick, when it could have waited for less. [This is
8224 almost certainly not relevant at current processor speeds, where it is
8225 unlikely to ever wait at all. But we try to future-proof.]
8227 5. The function that sleeps for a time interval that includes fractions of a
8228 second contained a race. It did not block SIGALRM between setting the
8229 timer, and suspending (a couple of lines later). If the interval was short
8230 and the sigsuspend() was delayed until after it had expired, the suspension
8231 never ended. On busy systems this could lead to processes getting stuck for
8234 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8235 process, before it forks any delivery processes. The open lookup caching
8236 mechanism meant that the open file or database connection was passed into
8237 the delivery process. The problem was that delivery processes always tidy
8238 up cached lookup data. This could cause a problem for the next delivery
8239 process started by the queue runner, because the external queue runner
8240 process does not know about the closure. So the next delivery process
8241 still has data in the lookup cache. In the case of a file lookup, there was
8242 no problem because closing a file descriptor in a subprocess doesn't affect
8243 the parent. However, if the lookup was caching a connection to a database,
8244 the connection was closed, and the second delivery process was likely to
8245 see errors such as "PGSQL: query failed: server closed the connection
8246 unexpectedly". The problem has been fixed by closing all cached lookups
8247 in a queue runner before running a delivery process.
8249 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8250 seem to have the "const" qualifier which it has on other OS. I've
8253 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8254 *of the same type* (client or server) with the same public name that an
8255 error should be diagnosed.
8257 9. When Exim looked up a host name for an IP address, but failed to find the
8258 original IP address when looking up the host name (a safety check), it
8259 output the message "<ip address> does not match any IP for NULL", which was
8260 confusing, to say the least. The bug was that the host name should have
8261 appeared instead of "NULL".
8263 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8264 user that is built into the binary, and the -C or -D options is used, root
8265 privilege is dropped before the configuration file is read. In addition,
8266 logging is switched to stderr instead of the normal log files. If the
8267 configuration then re-defines the Exim user, the unprivileged environment
8268 is probably not what is expected, so Exim logs a panic warning message (but
8271 However, if deliver_drop_privilege is set, the unprivileged state may well
8272 be exactly what is intended, so the warning has been cut out in that case,
8273 and Exim is allowed to try to write to its normal log files.
8279 1. smtp_return_error_details was not giving details for temporary sender
8280 or receiver verification errors.
8282 2. Diagnose a configuration error if two authenticators have the same public
8285 3. Exim used not to create the message log file for a message until the first
8286 delivery attempt. This could be confusing when incoming messages were held
8287 for policy or load reasons. The message log file is now created at the time
8288 the message is received, and an initial "Received" line is written to it.
8290 4. The automatically generated man page for command line options had a minor
8291 bug that caused no ill effects; however, a more serious problem was that
8292 the procedure for building the man page automatically didn't always
8293 operate. Consequently, release 4.20 contains an out-of-date version. This
8294 shouldn't happen again.
8296 5. When building Exim with embedded Perl support, the script that builds the
8297 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8298 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8300 6. The freeze_tell option was not being used for messages that were frozen on
8301 arrival, either by an ACL or by local_scan().
8303 7. Added the smtp_incomplete_transaction log selector.
8305 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8306 was accepting AUTH without a new EHLO.
8308 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8309 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8312 10. Logging of TCP/IP connections (when configured) now happens in the main
8313 daemon process instead of the child process, so that the TCP/IP connection
8314 count is more accurate (but it can never be perfect).
8316 11. The use of "drop" in a nested ACL was not being handled correctly in the
8317 outer ACL. Now, if condition failure induced by the nested "drop" causes
8318 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8319 or "require"), the connection is dropped.
8321 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8322 that yield "discard" can now be used with an "accept" or a "discard" verb,
8323 but an error is generated for any others (because I can't see a useful way
8324 to define what should happen).
8326 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8327 are now processed in the same way as lines in the Exim configuration file.
8328 In particular, continuation lines are supported.
8330 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8332 15. Added -ti meaning -t -i.
8334 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8335 domains, and warn by logging if others are found.
8337 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8338 returned from GIFCONF when Exim is trying to find the list of interfaces on
8339 a host. The code in os.c has been modified to copy each ifreq to an aligned
8340 structure in all cases.
8342 Also, in some cases, the returned ifreq's were being copied to a 'struct
8343 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8344 means the last couple of bytes of an IPv6 address could be chopped if the
8345 ifreq contained only a normal sockaddr (14 bytes storage).
8347 18. Named domain lists were not supported in the hosts_treat_as_local option.
8348 An entry such as +xxxx was not recognized, and was treated as a literal
8351 19. Ensure that header lines added by a DATA ACL are included in the reject log
8352 if the ACL subsequently rejects the message.
8354 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8355 MD5 (which is deprecated).
8357 21. When testing a filter file using -bf, Exim was writing a message when it
8358 took the sender from a "From " line in the message, but it was not doing so
8359 when it took $return_path from a Return-Path: header line. It now does.
8361 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8362 with a valid header line field name (a series of printing characters
8363 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8365 23. Changed "disc" in the source to "disk" to conform to the documentation and
8366 the book and for uniformity.
8368 24. Ignore Sendmail's -Ooption=value command line item.
8370 25. When execve() failed while trying to run a command in a pipe transport,
8371 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8372 could be confused with a return value of 69 from the command itself. This
8373 has been changed to 127, the value the shell returns if it is asked to run
8374 a non-existent command. The wording for the related log line suggests a
8375 non-existent command as the problem.
8377 26. If received_header_text expands to an empty string, do not add a Received:
8378 header line to the message. (Well, it adds a token one on the spool, but
8379 marks it "old" so that it doesn't get used or transmitted.)
8381 27. Installed eximstats 1.28 (addition of -nt option).
8383 28. There was no check for failure on the call to getsockname() in the daemon
8384 code. This can fail if there is a shortage of resources on the system, with
8385 ENOMEM, for example. A temporary error is now given on failure.
8387 29. Contrary to the C standard, it seems that in some environments, the
8388 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8389 program. Exim now does this explicitly; it affects the formatting of
8390 timestamps using strftime().
8392 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8393 complaints. I've now initialized all the variables, to avoid this.
8395 32. Header lines added by a system filter were not being "seen" during
8396 transport-time rewrites.
8398 33. The info_callback() function passed to OpenSSL is set up with type void
8399 (*)(SSL *, int, int), as described somewhere. However, when calling the
8400 function (actually a macro) that sets it up, the type void(*)() is
8401 expected. I've put in a cast to prevent warnings from picky compilers.
8403 34. If a DNS black list lookup found a CNAME record, but there were no A
8404 records associated with the domain it pointed at, Exim crashed.
8406 35. If a DNS black list lookup returned more than one A record, Exim ignored
8407 all but the first. It now scans all returned addresses if a particular IP
8408 value is being sought. In this situation, the contents of the
8409 $dnslist_value variable are a list of all the addresses, separated by a
8412 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8413 to accept a host name and all its aliases if the forward lookup for any of
8414 them yielded the IP address of the incoming connection. Now it accepts only
8415 those names whose forward lookup yields the correct IP address. Any other
8416 names are discarded. This closes a loophole whereby a rogue DNS
8417 administrator could create reverse DNS records to break through a
8418 wildcarded host restriction in an ACL.
8420 37. If a user filter or a system filter that ran in a subprocess used any of
8421 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8422 the wrong values were passed to the pipe command ($thisaddress had the
8423 value of $0, $0 had the value of $1, etc). This bug was introduced by
8424 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8426 38. Improved the line breaking for long SMTP error messages from ACLs.
8427 Previously, if there was no break point between 40 and 75 characters, Exim
8428 left the rest of the message alone. Two changes have been made: (a) I've
8429 reduced the minimum length to 35 characters; (b) if it can't find a break
8430 point between 35 and 75 characters, it looks ahead and uses the first one
8431 that it finds. This may give the occasional overlong line, but at least the
8432 remaining text gets split now.
8434 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8435 file descriptors might be low, and that setting 1000 would always raise it.
8436 It turns out that in some environments, the limit is already over 1000 and
8437 that lowering it causes trouble. So now Exim takes care not to decrease it.
8439 40. When delivering a message, the value of $return_path is set to $sender_
8440 address at the start of routing (routers may change the value). By an
8441 oversight, this default was not being set up when an address was tested by
8442 -bt or -bv, which affected the outcome if any router or filter referred to
8445 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8446 log only when "message" or "log_message" are set. However, if one of the
8447 conditions was an address verification, or a call to a nested ACL, the
8448 messages generated by the underlying test were being passed through. This
8449 no longer happens. The underlying message is available in $acl_verify_
8450 message for both "message" and "log_message" expansions, so it can be
8451 passed through if needed.
8453 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8454 new expansion $bh_ to give the encoded byte string without charset
8455 translation. Translation happens only if iconv() is available; HAVE_ICONV
8456 indicates this at build time. HEADERS_CHARSET gives the charset to
8457 translate to; headers_charset can change it in the configuration, and
8458 "headers charset" can change it in an individual filter file.
8460 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8461 that creates RFC 2047 encoded "words" labels them as that charset instead
8462 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8463 expansion operator; (ii) when Exim creates a From: line for a local
8464 message; (iii) when a header line is rewritten to include a "phrase" part.
8466 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8467 buggy, causing it to skip the first lines of messages whose message ID
8468 ended in 'D'. This would not have bitten before Exim release 4.14, because
8469 message IDs were unlikely to end in 'D' before then. The effect was to have
8470 incorrect size information for certain domains.
8472 45. #include "config.h" was missing at the start of the crypt16.c module. This
8473 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8476 46. If there was a timeout during a "random" callout check, Exim treated it as
8477 a failure of the random address, and carried on sending RSET and the real
8478 address. If the delay was just some slowness somewhere, the response to the
8479 original RCPT would be taken as a response to RSET and so on, causing
8480 mayhem of various kinds.
8482 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8483 when I implemented it. It didn't allow for the fact that some option values
8484 may legitimately be negative (e.g. size_addition), and it didn't even do
8485 the right test for positive values.
8487 48. Domain names in DNS records are case-independent. Exim always looks them up
8488 in lower case. Some resolvers return domain names in exactly the case they
8489 appear in the zone file, that is, they may contain uppercase letters. Not
8490 all resolvers do this - some return always lower case. Exim was treating a
8491 change of case by a resolver as a change of domain, similar to a widening
8492 of a domain abbreviation. This triggered its re-routing code and so it was
8493 trying to route what was effectively the same domain again. This normally
8494 caused routing to fail (because the router wouldn't handle the domain
8495 twice). Now Exim checks for this case specially, and just changes the
8496 casing of the domain that it ultimately uses when it transmits the message
8499 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8502 50. If a filter generated a file delivery with a non-absolute name (possible if
8503 no home directory exists for the router), the forbid_file option was not
8506 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8507 the existing equality matching.
8509 52. Exim was using ints instead of ino_t variables in some places where it was
8510 dealing with inode numbers.
8512 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8513 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8514 called TMPDIR, and if it finds it is different, it changes its value.
8516 54. The smtp_printf() function is now made available to local_scan() so
8517 additional output lines can be written before returning. There is also an
8518 smtp_fflush() function to enable the detection of a dropped connection.
8519 The variables smtp_input and smtp_batched_input are exported to
8522 55. Changed the default runtime configuration: the message "Unknown user"
8523 has been removed from the ACL, and instead placed on the localuser router,
8524 using the cannot_route_message feature. This means that any verification
8525 failures that generate their own messages won't get overridden. Similarly,
8526 the "Unrouteable address" message that was in the ACL for unverifiable
8527 relay addresses has also been removed.
8529 56. Added hosts_avoid_esmtp to the smtp transport.
8531 57. The exicyclog script was not checking for the esoteric option
8532 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8533 will work only if exicyclog is run under the appropriate euid.
8535 58. Following a discussion on the list, the rules by which Exim recognises line
8536 endings on incoming messages have been changed. The -dropcr and drop_cr
8537 options are now no-ops, retained only for backwards compatibility. The
8538 following line terminators are recognized: LF CRLF CR. However, special
8539 processing applies to CR:
8541 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8542 nor a local message in the state where . is a terminator.
8544 (ii) If a bare CR is encountered in a header line, an extra space is added
8545 after the line terminator so as not to end the header. The reasoning
8546 behind this is that bare CRs in header lines are most likely either
8547 to be mistakes, or people trying to play silly games.
8549 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8550 was being incorrectly given as 18 bytes larger than it should have been.
8551 This is a VOB (very old bug).
8553 60. This may never have affected anything current, but just in case it has:
8554 When the local host is found other than at the start of a list of hosts,
8555 the local host, those with the same MX, and any that follow, are discarded.
8556 When the list in question was part of a longer list of hosts, the following
8557 hosts (not currently being processed) were also being discarded. This no
8558 longer happens. I'm not sure if this situation could ever has previously
8561 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8564 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8565 header. This is something that is recommended in a new Internet Draft, and
8566 is something that is documented as being done by Sendmail. There are two
8567 possible values. For messages generated by the autoreply transport, Exim
8570 Auto-Submitted: auto-replied
8572 whereas for all other generated messages (e.g. bounces) it adds
8574 Auto-Submitted: auto-generated
8576 63. The "personal" condition in filters now includes a test for the
8577 Auto-Submitted: header. If it contains the string "auto-" the message it
8578 not considered personal.
8580 64. Added rcpt_include_affixes as a generic transport option.
8582 65. Added queue_only_override (default true).
8584 66. Added the syslog_duplication option.
8586 67. If what should have been the first header line of a message consisted of
8587 a space followed by a colon, Exim was mis-interpreting it as a header line.
8588 It isn't of course - it is syntactically invalid and should therefore be
8589 treated as the start of the message body. The misbehaviour could have
8590 caused a number of strange effects, including loss of data in subsequent
8591 header lines, and spool format errors.
8593 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8594 client host had authenticated. This control can now be exercised by an ACL
8595 for more flexibility.
8597 69. By default, callouts do not happen when testing with -bh. There is now a
8598 variant, -bhc, which does actually run the callout code, including
8599 consulting and updating the callout cache.
8601 70. Added support for saslauthd authentication, courtesy of Alexander
8604 71. If statvfs() failed on the spool or log directories while checking their
8605 size for availability, Exim confusingly gave the error "space shortage".
8606 Furthermore, in debugging mode it crashed with a floating point exception.
8607 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8608 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8609 serious problem, Exim now writes to the main and panic logs when this
8610 happens, with details of the failure. It then refuses to accept the
8611 incoming message, giving the message "spool directory problem" or "log
8612 directory problem" with a 421 code for SMTP messages.
8614 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8615 0, 1, and 2 exist, because some OS complain for execs without them (see
8616 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8617 descriptors. However, the code omitted to check that the open succeeded,
8618 causing mysterious errors if for some reason the permissions on /dev/null
8619 got screwed. Now Exim writes a message to the main and panic logs, and
8620 bombs out if it can't open /dev/null.
8622 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8623 interact so that it is all more flexible. It is supposed to remain
8624 backwards compatible. Also added extra_local_interfaces.
8626 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8627 to bomb out with an assertion failure - to the client this appears as a
8628 connection drop. This problem occurs in the part of the code that was taken
8629 from the Samba project. Fortunately, the assertion is in a very simple
8630 function, so I have fixed this by reproducing the function inline in the
8631 one place where it is called, and arranging for authentication to fail
8632 instead of killing the process with assert().
8634 75. The SPA client code was not working when the server requested OEM rather
8635 than Unicode encoding.
8637 76. Added code to make require_files with a specific uid setting more usable in
8638 the case where statting the file as root fails - usually a non-root-mounted
8639 NFS file system. When this happens and the failure is EACCES, Exim now
8640 forks a subprocess and does the per-uid checking as the relevant uid.
8642 77. Added process_log_path.
8644 78. If log_file_path was not explicitly set, a setting of check_log_space or
8645 check_log_inodes was ignored.
8647 79. If a space check for the spool or log partitions fails, the incident is now
8648 logged. Of course, in the latter case the data may get lost...
8650 80. Added the %p formatting code to string_format() so that it can be used to
8651 print addresses in debug_print(). Adjusted all the address printing in the
8652 debugging in store.c to use %p rather than %d.
8654 81. There was a concern that a line of code in smtp_in.c could overflow a
8655 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8656 initially expressed, the concern was not well-founded, because trailing
8657 spaces are removed early. However, if the trailing spaces were followed by
8658 a NULL, they did not get removed, so the overflow was possible. Two fixes
8661 (a) I re-wrote the offending code in a cleaner fashion.
8662 (b) If an incoming SMTP command contains a NULL character, it is rejected
8665 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8666 runs initgroups(), so that if the Exim user is in any additional groups,
8667 they will be used during message reception.
8673 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob