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 the next message-id from the transport to the delivery
10 process, we can loop there. A two-phase queue run will benefit,
11 particularly for 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.
22 JH/01 Support list of dkim results in the dkim_status ACL condition, making
23 it more usable in the data ACL.
25 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
26 Previously This was only logged, on the assumption that errors would be
27 seen for a previous fflush(). However, a fuse filesystem has been
28 reported as showing this an error for the fclose(). The spool is now in
29 an uncertain state, and we have logged and responded acceptance. Change
30 this to respond with a temp-reject, wipe spoolfiles, and log the error
33 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
34 during a recipient verify callout, a QUIT command was attempted on the
35 now-closed callout channel, causing a paniclog entry.
37 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
38 a connection_reject log_selector, under tls_on_connect. Previously
39 with this combination, when the connect ACL rejected, a spurious
40 paniclog entry was made.
42 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
43 of loadbalancer-detection for resumption, in 4.96 - which tries to
44 use the EHLO response. SMTPS does not have one at the time it is starting
45 TLS. Change the default for the smtp transport host_name_extract option
46 to be a static string, for TLS-on-connect cases; meaning that resumption
47 will always be attempted (unless deliberately overriden).
49 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
50 chunk-separator specification. This was broken by hardening introduced
53 JH/07 Bug 3050: Fix -bp for old message_id format spoolfiles. Previously it
54 included the -H with the id; this also messed up exiqgrep.
56 JH/08 Bug 3056: Tighten up parsing of DKIM DNS records. Previously, whitespace
57 was not properly skipped and empty elements would cause mis-parsing.
58 Tighten parsing of DKIM header records. Previously, all but lowercase
59 alpha chars would be ignored in potential tag names.
61 JH/09 Bug 3057: Add heuristic for spotting mistyped IPv6 addresses in lists
62 being searched. Previously we only had one for IPv4 addresses. Per the
63 documentation, the error results by default in a no-match result for the
64 list. It is logged if the unknown_in_list log_selector is used.
66 JH/10 Bug 3058: Ensure that a failing expansion in a router "set" option defers
67 the routing operation. Previously it would silently stop routing the
70 JH/11 Bug 3046: Fix queue-runs. Previously, the arrivel of a notification or
71 info-request event close in time to a scheduled run timer could result in
72 the latter being missed, and no further queue scheduled runs being
73 initiated. This ouwld be more likely on high-load systems.
75 JH/12 Refuse to accept a line "dot, LF" as end-of-DATA unless operating in
76 LF-only mode (as detected from the first header line). Previously we did
77 accept that in (normal) CRLF mode; this has been raised as a possible
78 attack scenario (under the name "smtp smuggling").
80 JH/13 Add an fdatasync call for the received message data file in spool, before
81 loggging reception and sending the SMTP ack. Previously we only flushed
82 the stdio buffer so there was still the possibility of a disk error.
84 JH/14 Bug 3061: Avoid a split log line when trying to rewrite a malformed
85 address. Previously, for the last address in a header line (commonly
86 there is only one) the terminating newline was part of the logged
89 JH/15 Bug 3061: Ensure a log line is written for a malformed address in a
90 header, when parsing for address-qualification. Previously one was only
91 written if there were rewrite rules.
93 JH/16 Two-phase queue runs are now reported in the daemon startup log line and
96 JH/17 Bug 3064: Fix combination of "-q<period> -R <recipients>". Introduction of
97 the multiple-queue-runners facility for 4.97 broke this, giving only a
98 one-time run of the queue.
100 JH/18 Bug 3068: Log a warning for use of deprecated syntax in query-style
103 JH/19 Fix TLS startup. When the last expansion done before the initiation of a
104 TLS session resulted in a forced-fail, a misleading error was logged for
105 the expansino of tls_certificates. This would affect the common case of
106 that option being set (main-section options) but not having any variable
107 parts. It could also potentially affect tls_privatekeys. The underlyding
108 coding errors go back to 4.90 but were only exposed in 4.97.
110 JH/20 Bug 3047: A recent (somewhere between 10.34 and 10.42) version of the
111 pcre2 library starting allocating 20kB rather than 112 bytes per match
112 call, which broke the 2GB total limitation on Exim's memory management
113 when a user had over 104207 messages stored and the appendfile
114 maildir_quota_directory_regex option is in use. Release the allocated
115 memory every thosand files to avoid this.
116 The same issue arises with the ACL regex condition, which is applied
117 to every line of a received message.
119 JH/21 Bug 3059: Fix crash in smtp transport. When running for a message for
120 which all recipients had been handled (itself an issue) a null-pointer
121 deref was done on trying to write a retry record. Fix that by counting
122 the outstanding recipients before trying to transmit the message.
123 The situation arose for a second MX try within a transport run, when the
124 first had perm-rejected a recipient (the only one for the connection, in
125 the case seen) during pipelining, and then closed the TCP connection.
126 The transport classified that as an I/O error, leaving the message
127 outstanding but having marked up the recipient as dealt-with. It then
128 tried another MX because of the I/O error. Fix this by converting the
129 message-level status to ok if there was a close but all recipients were
130 dealt with. Thanks to Wolfgand Breyha for debug runs.
132 JH/22 The ESMTP_LIMITS facility (RFC 9422) is promoted from experimental status
133 and is now controlled by the build-time option DISABLE_ESMTP_LIMITS.
135 JH/23 Bug 3066: Avoid leaking lookup database credentials to log.
137 JH/24 Bug 3081: Fix a delivery process crash. When the router "errors_to"
138 option specified a fixed address, later rewriting on that address would
139 trip on the configuration data being readonly. Instead of modifying
140 in-place, copy data. Found and fixed by Peter Benie.
142 JH/25 Bug 3079: Fix crash in dbmnz. When a key was present for zero-length
143 data a null pointer was followed. Find and testcase by Sebastian Bugge.
145 JH/26 Fix encoding for an AUTH parameter on a MAIL FROM command. Previously
146 decimal 127 chars were not encoded, and lowercase hex was used for
147 encoded values. Outstanding since at least 1999.
149 JH/27 Fix crash in logging. When a message with a large number of recipients
150 had been received, and logging of recipients is enabled, the buffer used
151 for logging could reach limit. A read using a null pointer would then
152 be done, resulting in a crash of the receiving process before an SMTP
153 ACK for the message was returned to the sending system. Duplicate
154 messages were created as a result.
155 Find and debug help by Mateusz Krawczyk
157 JH/28 Bug 3086: Fix exinext for ipv6. Change the format of keys in the retry
158 DB, wrapping transport record bare-ip "host names" and ipv6
159 "host addresses" in square-brackets. This makes the parsing that
160 exinext does more reliable.
162 JH/29 Bug 3087: Fix SRS encode. A zero-length quoted element in the local-part
165 JH/30 Bug 3029: Avoid feeding Resent-From: to DMARC.
167 JH/31 Bug 3027: For -bh / -bhc tests change to using the compressed form of
168 ipv6 addresses for the sender. Previously the uncompressed form was used,
169 and if used in textual form this would result in behavior difference
172 JH/32 Bug 3096: MAIL before HELO/EHLO, where required by hosts_require_helo, is
173 now classed as a protocol error and subject to smtp_max_synprot_errors.
175 JH/33 Bug 2994: A subdir dsearch lookup should permit a directory name that starts
176 ".." and has following characters.
178 JH/34 Fix delivery ordering for 2-phase queue run combined with
185 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
186 SMTP connection" log lines.
188 JH/02 Option default value updates:
189 - queue_fast_ramp (main) true (was false)
190 - remote_max_parallel (main) 4 (was 2)
192 JH/03 Cache static regex pattern compilations, for use by ACLs.
194 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
195 Make the rewrite never match and keep the logging. Trust the
196 admin to be using verify=header-syntax (to actually reject the message).
198 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
199 (under Linux) we watch the dir containing the final file; previously
200 it would be the dir with the first symlink. We still do not monitor
203 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
204 dn_expand() is happy to pass them through.
206 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
207 the file with the proof had an unchanged name, the new proof(s) were
208 loaded on top of the old ones (and nover used; the old ones were stapled).
210 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
211 more than one message arrived in a single connection a reference from
212 the earlier message could be re-used. Often a sigsegv resulted.
213 These variables were introduced in Exim 4.87.
214 Debug help from Graeme Fowler.
216 JH/09 Fix ${filter } for conditions that modify $value. Previously the
217 modified version would be used in construction the result, and a memory
220 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
221 Find and fix by Jasen Betts.
223 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
224 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
225 the systemwide configuration to override the Exim config.
227 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
228 API changes in libopendmarc.
230 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
231 pid 1, in the normal "background daemon" mode, having to drop process-
232 group leadership also lost track of needing to create listener sockets.
234 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
235 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
237 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
238 a capture group which obtained no text (eg. "(abc)*" matching zero
239 occurrences) could cause a segfault if the corresponding $<n> was
242 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
243 included a close-brace character (eg. it itself used an expansion) an
246 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
247 starting TLS. Previously it was after, meaning that attackers on such
248 ports had to be screened using the host_reject_connection main config
249 option. The new sequence aligns better with the STARTTLS behaviour, and
250 permits defences against crypto-processing load attacks, even though it
251 is strictly an incompatible change.
252 Also, avoid sending any SMTP fail response for either the connect ACL
253 or host_reject_connection, for TLS-on-connect ports.
255 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
256 Previously this was not permitted, but it makes reasonable sense.
257 While there, restore a restriction on using it from a connect ACL; given
258 the change JH/16 it could only return false (and before 4.91 was not
261 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
262 was exactly sized compared to the log buffer, a crash occurred with the
263 misleading message "bad memory reference; pool not found".
264 Found and traced by Jasen Betts.
266 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
267 dns_again_means_nonexist included an element causing a DNS lookup which
268 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
269 included (though probably not limited to) a process crash from stack
270 memory limit, or from excessive open files. Replace this with a paniclog
271 whine (as this is likely a configuration error), and returning
274 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
275 this always failed, probably leading to the usual downgrade to in-clear
278 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
279 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
280 to not checking that list for these lookups.
282 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
285 JH/23 Fix crash in string expansions. Previously, if an empty variable was
286 immediately followed by an expansion operator, a null-indirection read
287 was done, killing the process.
289 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
290 include an SMTP response string which is longer than that supported
291 by the delivering transport. Alleviate by wrapping such lines before
294 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
295 chars (RFC limit). Previously a limit of 12 items was made, which with
296 a not-impossible References: in the message being bounced could still
297 be over-large and get stopped in the transport.
299 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
300 close. Previously a bare socket close was done.
302 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
305 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
306 message being considered for delivery was already being handled by
307 another process, and having an SMTP connection already open, the function
308 to close it tried to use an uninitialized variable. This would afftect
309 high-volume sites more, especially when running mailing-list-style loads.
310 Pollution of logs was the major effect, as the other process delivered
311 the message. Found and partly investigated by Graeme Fowler.
313 JH/29 Change format of the internal ID used for message identification. The old
314 version only supported 31 bits for a PID element; the new 64 (on systems
315 which can use Base-62 encoding, which is all currently supported ones
316 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
317 and must use Base-36). The new ID is 23 characters rather than 16, and is
318 visible in various places - notably logs, message headers, and spool file
319 names. Various of the ancillary utilities also have to know the format.
320 As well as the expanded PID portion, the sub-second part of the time
321 recorded in the ID is expanded to support finer precision. Theoretically
322 this permits a receive rate from a single comms channel of better than the
324 The major timestamp part of the ID is not changed; at 6 characters it is
325 usable until about year 3700.
326 Updating from previously releases is fully supported: old-format spool
327 files are still usable, and the utilities support both formats. New
328 message will use the new format. The one hints-DB file type which uses
329 message-IDs (the transport wait- DB) will be discarded if an old-format ID
330 is seen; new ones will be built with only new-format IDs.
331 Optionally, a utility can be used to convert spool files from old to new,
332 but this is only an efficiency measure not a requirement for operation
333 Downgrading from new to old requires running a provided utility, having
334 first stopped all operations. This will convert any spool files from new
335 back to old (losing time-precision and PID information) and remove any
336 wait- hints databases.
338 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
339 we treated them as item separators when parsing for a list item, but they
340 need to be protected by the doublequotes. While there, add handling for
343 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
344 Found and fixed by Jasen Betts. No testcase for this as my usual text
345 editor insists on emitting only valid UTF-8.
347 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
348 a null-indirection SIGSEGV for the receive process.
350 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
351 -bh use. Internal checking would spot this and take a panic.
353 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
354 In 4.96 this would expand to empty.
356 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
357 certificate. Find and fix by Andreas Metzler.
359 JH/36 Add ARC info to DMARC hostory records.
361 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
362 or fakedefer. Previously the sender could discover that the message
363 had in fact been accepted.
365 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
366 sequences. Previously the input was not noted as being tainted; notably
367 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
368 bad coding of authenticators.
370 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
371 and ${tr...}. Found and diagnosed by Heiko Schlichting.
373 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
374 could be triggered by externally-supplied input. Found by Trend Micro.
377 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
378 be triggered by externally-controlled input. Found by Trend Micro.
381 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
382 be triggered by externally-controlled input. Found by Trend Micro.
385 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
386 Make the rewrite never match and keep the logging. Trust the
387 admin to be using verify=header-syntax (to actually reject the message).
389 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
392 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
398 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
399 after reception to before a subsequent reception. This should
400 mean slightly faster delivery, and also confirmation of reception
403 JH/02 Move from using the pcre library to pcre2. The former is no longer
404 being developed or supported (by the original developer).
406 JH/03 Constification work in the filters module required a major version
407 bump for the local-scan API. Specifically, the "headers_charset"
408 global which is visible via the API is now const and may therefore
409 not be modified by local-scan code.
411 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
412 sendfile() didi not account for the way the ClamAV driver code called it.
414 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
415 time check was being done for every character; replace that with one
418 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
419 sent was prefixed with a length byte.
421 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
422 RFC 5321. Previously Dovecot (at least) would log errors during
425 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
426 in 4.61 without a reason logged. Binaries will be bigger, which might
427 matter on diskspace-constrained systems, but debug is easier.
429 JH/09 Fix macro-definition during "-be" expansion testing. The move to
430 write-protected store for macros had not accounted for these runtime
431 additions; fix by removing this protection for "-be" mode.
433 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
434 handing out large-numbered file descriptors, violating the usual Unix
435 assumption (and required by Posix) that the lowest possible number will be
436 allocated by the kernel when a new one is needed. In the daemon, and any
437 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
438 are not useable for FD_SET() [and hence select()] and overwrite the stack.
439 Assorted crashes happen.
441 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
442 main-section options or in a connect ACL, the value from the first ever
443 connection was never replaced for subsequent connections. Found by
446 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
447 though only once PCRE2 was introduced: the memory accounting used under
448 debug offset allocations by an int, giving a hard trap in early startup.
449 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
451 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
452 with underbars is given. The write-protection of configuration introduced
453 in 4.95 trapped when normalisation was applied to an option not needing
456 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
458 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
459 failing to close the certificates directory, every hour or any time it
462 JH/16 Debugging initiated by an ACL control now continues through into routing
463 and transport processes. Previously debugging stopped any time Exim
464 re-execs, or for processing a queued message.
466 JH/17 The "expand" debug selector now gives more detail, specifically on the
467 result of expansion operators and items.
469 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
470 bad comparison between the option value and the name of the file to
471 be included was done, and a mismatch was wrongly identified.
472 4.88 to 4.95 are affected.
474 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
476 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
477 supplied as the db file-pair basename. Previously, if a directory
478 path was given, for example via the autoreply "once" option, the DB
479 file.pag and file.dir files would be created in that directory's
482 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
483 "taint" log_selector. These were previously deprecated.
485 JH/22 Fix static address-list lookups to properly return the matched item.
486 Previously only the domain part was returned.
488 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
489 the call into OpenSSL to send a TLS Close was being repeated; this
490 resulted in the library waiting for the peer's Close. If that was never
491 sent we waited forever. Fix by tracking send calls.
493 JH/24 The ${run} expansion item now expands its command string elements after
494 splitting. Previously it was before; the new ordering makes handling
495 zero-length arguments simpler. The old ordering can be obtained by
496 appending a new option "preexpand", after a comma, to the "run".
498 JH/25 Taint-check exec arguments for transport-initiated external processes.
499 Previously, tainted values could be used. This affects "pipe", "lmtp" and
500 "queryprogram" transport, transport-filter, and ETRN commands.
501 The ${run} expansion is also affected: in "preexpand" mode no part of
502 the command line may be tainted, in default mode the executable name
505 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
506 the the facility was not passed across execs, and only the first message
507 passed over a connection could use BDAT; any further ones using DATA.
509 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
510 uses $sending_ip_address and an interface is specified.
511 Previously any use of the local address in the EHLO name disabled
512 PIPECONNECT, the common case being to use the rDNS of it.
514 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
515 resumption. Previously verify failed because no certificate status is
516 passed on the wire for the restarted session. Fix by using the recorded
517 ocsp status of the stored session for the new connection.
519 JH/29 TLS resumption: the key for session lookup in the client now includes
520 more info that a server could potentially use in configuring a TLS
521 session, avoiding oferring mismatching sessions to such a server.
522 Previously only the server IP was used.
524 JH/30 Fix string_copyn() for limit greater than actual string length.
525 Previously the copied amount was the limit, which could result in a
526 overlapping memcpy for newly allocated destination soon after a
527 source string shorter than the limit. Found/investigated by KM.
529 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
530 close; it may be needed for a subsequent connection. This caused a
531 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
533 JH/32 Fix CHUNKING for a second message on a connection when the first was
534 rejected. Previously we did not reset the chunking-offered state, and
535 erroneously rejected the BDAT command. Investigation help from
538 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
539 an empty address. Previously the expansion returned an error.
541 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
542 proxy. Previously these were misparsed, leading to paniclog entries.
548 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
549 related applications. Previously an "H" was used where available info
550 says that "M" should be, so change to match.
552 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
553 as arguments, so an implementation trying to copy these into a local
554 buffer was taking a taint-enforcement trap. Fix by using dynamically
555 created buffers. Similar fix for radius expansion condition.
557 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
558 reasonable, eg. to count headers. Fix by using dynamically created
559 buffers rather than a local. Do similar fixes for ACL actions "dcc",
560 "log_reject_target", "malware" and "spam"; the arguments are expanded
561 so could be handling tainted values.
563 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
564 broken the (no-op) support for this sendmail command. Restore it
565 to doing nothing, silently, and returning good status.
567 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
568 record path was given (or the default used) without a leading directory
569 path, an error occurred on trying to open it. Use the transport's working
572 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
573 transport. Previously it was the name on the DNS A-record; use instead
574 the head of the CNAME chain leading there (if there is one). This seems
575 to align better with RFC 6125.
577 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
578 smtp_accept_max_per_host allocated resources which were not released
579 when the limit was exceeded. This eventually crashed the daemon. Fix
580 by adding a release action in that path.
582 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
583 expanded; previously using tainted values was rejected. Fix by using
584 dynamically-created buffers.
586 JH/09 Relax restrictions on ACL verify condition needing access to message
587 headers. Previously they were only permitted in data and non-smtp ACLs;
588 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
589 not_blind, header_sender and header_names_ascii verification.
591 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
592 Previously a macro used one argument twice; when called with the
593 argument as an expression having side-effects, incorrect operation
594 resulted. Use an inlineable function.
596 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
597 held open for a verify callout. Previously this wan not accounted for
598 and a corrupt onward SMTP conversation resulted.
600 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
601 Previously they were embedded naively in the constructed address; when
602 needed, strip the quoting and quote the entire local_part.
603 Also make the inbound_srs expansion condition handle quoting.
605 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
606 excluded, not matching the documentation.
608 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
609 was given for the sqlite_dbfile a trap resulted.
611 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
612 "name" argument resulted in a trap. There is no reason to disallow such;
613 this was a coding error.
615 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
616 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
617 spent suspended, ignoring the POSIX definition. Previously we assumed
618 it did and a constant offset from real time could be used as a correction.
619 Change to using the same clock source for the start-of-message and the
620 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
621 exists, just to get a clock slightly more aligned to reality.
623 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
624 RFC says it is optional some validators care. The missing char was not
625 intended but triggered by a line-wrap alignment. Discovery and fix by
626 Guillaume Outters, hacked on by JH.
628 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
629 name being quoted was tainted a trap would be taken. Fix by using
630 dynamically created buffers. The routine could have been called by a
631 rewrite with the "h" flag, by using the "-F" command-line option, or
632 by using a "name=" option on a control=submission ACL modifier.
634 JH/19 SPF: change the Authentication-Results expansion component to give
635 smtp.helo when the sender domain is empty. Previously it gave
638 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
639 not in 127.0.0.0/8 to help in spotting list domains taken over by a
640 domain-parking registrar.
642 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
643 Previously when a whitespace character was specified it was not inserted
644 after removing the newline.
646 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
647 the domain part of the recipient address. This overrides any tls_sni
648 option set, which was previously used.
650 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
653 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
654 is_tainted() had an off-by-one error in the overenthusiastic direction.
655 Find and fix by Gavan. Although NetBSD is not a supported platform for
656 4.94 this bug could affect other platforms.
658 PP/01 Fix default prime selection to be consistent.
659 One path used ike23 still, instead of exim.dev.20160529.3; now both
660 execution flows will use the same DH primes (currently
661 exim.dev.20160529.3).
663 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
664 option in smtp transport, to match the documentation. Previously
665 verification was not being done in some cases where it should have been.
667 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
668 than one server was defined and depending on the platform memory layout
669 details, an internal consistency trap could be hit while walking the list
672 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
673 files. The value is used by the authresults expansion item. Previously
674 if this was used in a router or transport, a crash could result.
676 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
677 have a sufficient incidence of EINTR returns from select that an
678 interaction with other operations done by the main daemon loop exposed
679 a bug in the error-handling. This was benign apart from the log
682 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
683 for consistency with delivered "=>" and failed "**" lines. While we're
684 there, handle PRX and TFO.
686 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
687 applied. This resulted, if any header-line rewrite rules were configured,
688 in a panic-log triggerable by sending a message with a long address in
689 a header. Fix by increasing the arbitrary limit to larger than a single
690 (dewrapped) 5322 header line maximum size.
692 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
693 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
694 RFC 6648 which deprecates X- options in protocols as a general practice.
695 Changeover between the implementations is handled by the mechanisms
698 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
699 a remote which uses callout/hold. Previously the local was queued.
701 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
704 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
705 log line. The asterisk is now consistently appended to the remote IP
706 (and port, if given), and will also be provided on defer and fail log
707 lines. Previously it could be placed on the local IP if that was being
708 logged, and was only provided on delivery lines.
710 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
712 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
713 authenticator client_send option. Previously the next char, after a pair
714 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
715 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
716 documentation. There is still no way to get a leading ^ immediately
717 after a NUL (ie. for the password of a PLAIN method authenticator.
719 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
720 files. For bad sizes read, delete the record and whine to paniclog.
722 JH/38 When logging an AUTH failure, as server, do not include sensitive
723 information. Previously, the credentials would be included if given
724 as part of the AUTH command line and an ACL denied authentication.
726 JH/39 Bug 2691: fix $local_part_data. When the matching list element
727 referred to a file, bad data was returned. This likely also affected
730 JH/40 The gsasl authenticator now supports caching of the salted password
731 generated by the client-side implementation. This required the addition
732 of a new variable: $auth4.
734 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
735 left undeleted; the attempt to re-create it then failed - resulting in
736 the usual "SIGHUP tp have daemon reload configuration" to not work.
737 This affected any platform not supporting "abstract" Unix-domain
738 sockets (i.e. not Linux).
740 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
741 recipients" response to RCPT in a later response, with a 250. The
742 previous coding assumed this would not happen, and under PIPELINING
743 would result in both lost and duplicate recipients for a message.
745 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
746 Previously the weighting was incorrectly applied. Similar fix for socks
747 proxies. Found and fixed by Heiko Schlichting.
749 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
750 not handle sub-lists included using the +namedlist syntax. While
751 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
752 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
755 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
756 Previously the permanent pool was used, so the store could not be freed.
757 This meant a connection with many messages would use continually-growing
760 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
761 per-pool so as not to waste too much space. Previously a constant size
762 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
763 DOS attacks harder. The cost is wasted memory use in the larger blocks.
765 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
766 same space repeatedly, and a smaller process footprint.
768 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
769 for GnuTLS. Previously the name started "%s" which, while not a bug,
770 looked as if if might be one.
772 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
773 "continued connection") make the $proxy_* variables available. Previously
774 the information was not passed across the exec() call for subsequent
775 transport executions. This also mean that the log lines for the
776 messages can show the proxy information.
778 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
779 receive time. With modern systems the difference is significant.
780 The historical behaviour can be restored by disabling (a new) log_selector
781 "queue_time_exclusive".
783 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
784 content) were specifically tested for. Now, also cover expansions
785 resulting in ACL names and inline ACL content.
787 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
788 making it unusable in complex expressions.
790 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
791 fail with a taint-check on the spoolfile name, and leave the message
794 HS/01 Enforce absolute PID file path name.
796 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
798 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
800 PP/02 Bug 2643: Correct TLS DH constants.
801 A missing NUL termination in our code-generation tool had led to some
802 incorrect Diffie-Hellman constants in the Exim source.
803 Reported by kylon94, code-gen tool fix by Simon Arlott.
805 PP/03 Impose security length checks on various command-line options.
806 Fixes CVE-2020-SPRSS reported by Qualys.
808 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
809 better. Reported by Qualys.
811 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
812 providing a particularly obnoxious sender full name.
815 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
817 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
820 PP/08 Change default for recipients_max from unlimited to 50,000.
822 PP/09 Fix security issue with too many recipients on a message (to remove a
823 known security problem if someone does set recipients_max to unlimited,
824 or if local additions add to the recipient list).
825 Fixes CVE-2020-RCPTL reported by Qualys.
827 PP/10 Fix security issue in SMTP verb option parsing
828 Fixes CVE-2020-EXOPT reported by Qualys.
830 PP/11 Fix security issue in BDAT state confusion.
831 Ensure we reset known-good where we know we need to not be reading BDAT
832 data, as a general case fix, and move the places where we switch to BDAT
833 mode until after various protocol state checks.
834 Fixes CVE-2020-BDATA reported by Qualys.
836 HS/03 Die on "/../" in msglog file names
838 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
839 the Exim runtime user are allowed to create files.
841 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
844 QS/03 When reading the output from interpreted forward files we do not
845 pass the pipe between the parent and the interpreting process to
846 executed child processes (if any).
848 QS/04 Always die if requested from internal logging, even is logging is
851 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
852 the API; compilation noo longer completes with DMARC support included.
853 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
854 been reported on other platforms.
856 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
858 JH/56 Make the majority of info read from config files readonly, for defence-in-
859 depth against exploits. Suggestion by Qualys.
860 Not supported on Solaris 10.
862 JH/57 Fix control=fakreject for a custom message containing tainted data.
863 Previously this resulted in a log complaint, due to a re-expansion present
864 since fakereject was originally introduced.
866 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
867 modifier was given, a loop resulted.
869 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
870 pipelined SMTP command followed the BDAT LAST then it would be
871 incorrectly treated as part of the message body, causing a verification
874 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
875 require looser validation rules than those for 821-level addresses,
876 which only permit IP addresses.
882 JH/01 Avoid costly startup code when not strictly needed. This reduces time
883 for some exim process initialisations. It does mean that the logging
884 of TLS configuration problems is only done for the daemon startup.
886 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
888 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
889 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
892 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
893 DKIM signing is being done. Previously a transport_filter would always
894 disable CHUNKING, falling back to traditional DATA.
896 JH/05 Regard command-line recipients as tainted.
898 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
900 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
901 PAM library frees one of the arguments given to it, despite the
902 documentation. Therefore a plain malloc must be used.
904 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
905 on-stack buffers were used, resulting in a taint trap when DSN information
906 copied from a received message was written into the buffer.
908 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
909 the ordering of its ARC headers. This caused a crash.
911 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
912 a new record was being constructed with information from the peer, a trap
915 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
916 installation would get error messages from DMARC verify, when it hit the
917 nonexistent file indicated by the default. Distros wanting DMARC enabled
918 should both provide the file and set the option.
919 Also enforce no DMARC verification for command-line sourced messages.
921 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
922 could, depending on the platform, hang at the STARTTLS response.
924 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
925 message on a connection. Previously if one message had ARC headers and
926 the following one did not, a crash could result when adding an
927 Authentication-Results: header.
929 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
930 Exim main code and Exim-related utities. The introduction of taint
931 tracking also did many adjustments to string handling. Since then, eximon
932 frequently terminated with an assert failure.
934 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
935 check for 452 responses. This slightly helps the inefficieny of doing
936 a large alias-expansion into a recipient-limited target. The max_rcpt
937 transport option still applies (and at the current default, will override
938 the new feature). The check is done for either cause of synch, and forces
939 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
940 connection. The new facility is not tunable at this time.
942 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
943 library live data was being used, so the results became garbage. Make
944 copies while it is still usable.
946 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
947 on delivery deferred (==) and failed (**) lines (if a delivery was
948 attemtped). Previously it was only on completion (=>) lines.
950 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
951 for the expansion of the server_scram_iter and server_scram_salt options.
953 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
954 are now specifically given a NO_DATA response without hitting the system
955 resolver. The library goes on to do the now-standard TXT lookup.
956 Use of dnsdb lookups is not affected.
958 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
959 only retrieve the errormessage once. Previously two calls to dlerror()
960 were used, and the second one (for mainlog/paniclog) retrieved null
963 JH/20 Taint checking: disallow use of tainted data for
964 - the appendfile transport file and directory options
965 - the pipe transport command
966 - the autoreply transport file, log and once options
967 - file names used by the redirect router (including filter files)
969 - paths used by single-key lookups
970 Previously this was permitted.
972 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
973 adjusted the size of a major service buffer; this failed because the
974 buffer was in use at the time. Change to a compile-time increase in the
975 buffer size, when this authenticator is compiled into exim.
977 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
978 previous fast-mode was untenable in the face of glibs using mmap to
979 support larger malloc requests.
981 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
982 New values supported, if defined on system where compiled:
983 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
984 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
986 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
987 running a limited number of proceses in parallel, a benefit is gained. The
988 amount varies with the platform hardware and load. The use of the option
989 queue_run_in_order means we cannot do this, as ordering becomes
992 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
993 had introduced a string-copy (for ensuring NUL-termination) which was not
994 appropriate for that case, which can include embedded NUL bytes in the
995 block of data. Investigation showed the copy to actually be needless, the
996 data being length-specified.
998 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
999 done during a receiving connection, and both used TLS, global info was
1000 used rather than per-connection info for tracking the state of data
1001 queued for transmission. This could result in a connection hang.
1003 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
1004 Previously, when delivering serveral messages down a single connection
1005 only the first would provide a SIZE. This was due to the size information
1006 not being properly tracked.
1008 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
1009 TAI (at 37 seconds currently), pretend to be in UTC for time-related
1010 expansion and logging. Previously, spurious values such as a future
1011 minute could be seen.
1013 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
1014 it could crash from a null-deref. This could also affect the
1015 ${addresses: } operator and ${readsock } item.
1017 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
1018 message following a mime one, the variable was not reset.
1020 JH/30 When an pipelined-connect fails at the first response, assume incorrect
1021 cached capability (perhaps the peer reneged?) and immediately retry in
1024 JH/31 Fix spurious detection of timeout while writing to transport filter.
1026 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
1027 an attempt to copy the string was made before checking it.
1029 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
1030 taint of the lookup key was maintained; we now regard the presence in the
1031 filesystem as sufficient validation.
1033 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
1034 argument is supplied.
1036 JH/35 The dsearch lookup now requires that the directory is an absolute path.
1037 Previously this was not checked, and nonempty relative paths made an
1038 access under Exim's current working directory.
1040 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
1041 Previously no event was raised.
1043 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
1044 parameter supplied by the sender MAIL FROM command. Previously it was
1045 ignored, and only the check_spool_space option value for the required
1048 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
1049 the size of the signing public-key. Previously it was instead giving
1050 the size of the signature hash.
1052 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
1053 the default. See the (new) dkim_verify_min_keysizes option.
1055 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
1056 and an ACL use a lookup for checking either the local_part or domain,
1057 stale data could be accessed. Ensure that variable references are
1058 dropped between messages.
1060 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
1061 by the client was not checked as pointing within response data before
1062 being used. A malicious client could thus cause an out-of-bounds read and
1063 possibly gain authentication. Fix by adding the check.
1065 JH/42 Internationalisation: change the default for downconversion in the smtp
1066 transport to be "if needed". Previously it was "as previously set" for
1067 the message, which usually meant "if needed" for message-submission but
1068 "no" for everything else. However, MTAs have been seen using SMTPUTF8
1069 even when the envelope addresses did not need it, resulting in forwarding
1070 failures to non-supporting MTAs. A downconvert in such cases will be
1071 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
1072 transport. The change does mean that addresses needing conversion will
1073 be converted when previously a delivery failure would occur.
1075 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
1076 response was received it would be used unchecked in a fail-DSN, violating
1077 standards on line-length limits. Truncate if needed.
1079 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
1080 doesn't work. (Additionally add a new main config option to configure the
1087 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
1088 side, to decode a TLS 1.3 packet capture.
1090 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
1091 Previously the default library behaviour applied, sending two, each in
1092 its own TCP segment.
1094 JH/03 Debug output for ACL now gives the config file name and line number for
1097 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
1099 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
1101 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
1102 buffer overrun for (non-chunking) other transports.
1104 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
1105 TLS1.3, means that a server rejecting a client certificate is not visible
1106 to the client until the first read of encrypted data (typically the
1107 response to EHLO). Add detection for that case and treat it as a failed
1108 TLS connection attempt, so that the normal retry-in-clear can work (if
1109 suitably configured).
1111 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
1112 and/or domain. Found and fixed by Jason Betts.
1114 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
1115 configuration). If a CNAME target was not a wellformed name pattern, a
1118 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
1119 the OS reports them interleaved with other addresses.
1121 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
1122 used both for input and for a verify callout, both encrypted, SMTP
1123 responses being sent by the server could be lost. This resulted in
1124 dropped connections and sometimes bounces generated by a peer sending
1127 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
1128 string. Previously it was possible to cause undefined behaviour in a
1129 library routine (usually a crash). Found by "zerons".
1131 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
1134 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
1135 API was removed, so update to use the newer ones.
1137 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
1138 any timeout set, is taking a long time. Previously we would hang on to a
1139 rotated logfile "forever" if the input was arriving with long gaps
1140 (a previous attempt to fix addressed lack, for a long time, of initial
1143 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1144 shared (NFS) environment. The length of the tempfile name is now
1145 4 + 16 ("hdr.$message_exim_id") which might break on file
1146 systems which restrict the file name length to lower values.
1147 (It was "hdr.$pid".)
1149 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1150 shared (NFS) environment.
1152 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1153 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1156 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1157 on some platforms for bit 31.
1159 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1160 to changes apparently associated with TLS1.3 handling some of the APIs
1161 previously used were either nonfunctional or inappropriate. Strings
1162 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1163 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1164 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1165 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1166 and the use of specific cipher names in the encrypted= ACL condition.
1168 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1170 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1171 verification result was not updated unless hosts_require_ocsp applied.
1173 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1174 queue_list_requires_admin set to false, non-admin users were denied the
1177 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1178 directory-of-certs mode. Previously they were advertised despite the
1181 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1182 A single TCP connection by a client will now hold a TLS connection open
1183 for multiple message deliveries, by default. Previously the default was to
1186 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1187 default. If built with the facility, DANE will be used. The facility
1188 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1190 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1191 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1192 must be defined and you must still, unless you define DISABLE_TLS, manage
1193 the the include-dir and library-file requirements that go with that
1194 choice. Non-TLS builds are still supported.
1196 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1199 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1200 default. If the platform supports and has the facility enabled, it will
1201 be requested on all coneections.
1203 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1204 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1206 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1208 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1209 success-DSN messages. Previously the From: header was always the default
1210 one for these; the option was ignored.
1212 JH/28 Fix the timeout on smtp response to apply to the whole response.
1213 Previously it was reset for every read, so a teergrubing peer sending
1214 single bytes within the time limit could extend the connection for a
1215 long time. Credit to Qualsys Security Advisory Team for the discovery.
1217 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1218 delivery address, which leaked information of the results of local
1219 forwarding. Change to the original envelope recipient address, per
1222 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1223 requested. Previously not bounce was generated and a log entry of
1224 error ignored was made.
1226 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1228 JH/32 Introduce a general tainting mechanism for values read from the input
1229 channel, and values derived from them. Refuse to expand any tainted
1230 values, to catch one form of exploit.
1232 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1233 was unused and the unexpanded text used for the test. Found and
1234 fixed by Ruben Jenster.
1236 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1237 an attempt to use a TLS library read routine dereffed a nul pointer,
1240 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1241 them in our smtp response.
1243 JH/36 Have the general router option retry_use_local_part default to true when
1244 any of the restrictive preconditions are set (to anything). Previously it
1245 was only for check_local user. The change removes one item of manual
1246 configuration which is required for proper retries when a remote router
1247 handles a subset of addresses for a domain.
1249 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1250 link count into consideration.
1252 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1253 caused the extension of big_buffer, the following lines were ignored.
1255 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1256 accordance with RFC 2308. Previously there was no expiry, so a longlived
1257 receive process (eg. due to ACL delays) versus a short SOA value could
1260 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1262 JH/39 Promote DMARC support to mainline.
1264 JH/40 Bug 2452: Add a References: header to DSNs.
1266 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1267 parameters. The relevant library call is documented as "Deprecated: This
1268 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1269 3.6.0, DH parameters are negotiated following RFC7919."
1271 HS/06 Change the default of dnssec_request_domains to "*"
1273 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1274 carried on and emitted a BDAT command, even when PIPELINING was not
1277 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1278 buffer was used for the filename, resulting in a trap when tainted
1279 arguments (eg. $domain) were used.
1281 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1282 recommended to avoid a possible server-load attack. The feature can be
1283 re-enabled via the openssl_options main cofiguration option.
1285 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1286 for version 4.90 - adding a "more data" boolean to the arguments.
1287 Bumped the ABI version number also, this having been missed previously;
1288 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1289 respect of usage of smtp_printf() by either local_scan code or libraries
1290 accessed via the ${dlfunc } expansion item. Both will need coding
1291 adjustment for any calls to smtp_printf() to match the new function
1292 signature; a FALSE value for the new argument is always safe.
1294 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1295 the file-offset (which the Linux syscall does, and exim expects); this
1296 resulted in an indefinite loop.
1298 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1299 to do ARC verification. The Authentication-Results: header line added
1300 by the configuration then had no ARC item.
1302 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1303 an incorrect mode was used for reading the result, resulting in it being
1310 JH/01 Remove code calling the customisable local_scan function, unless a new
1311 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1313 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1314 non-signal-safe functions being used.
1316 JH/03 Bug 2269: When presented with a received message having a stupidly large
1317 number of DKIM-Signature headers, disable DKIM verification to avoid
1318 a resource-consumption attack. The limit is set at twenty.
1320 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1321 report of oldest_pass in ${authres } in consequence, and separate out
1322 some descriptions of reasons for verification fail.
1324 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1325 files in the spool were present and unlocked. A queue-runner could spot
1326 them, resulting in a duplicate delivery. Fix that by doing the unlock
1327 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1328 add more error-checking on spoolfile handling while that code is being
1331 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1332 No known attacks, no CVE, this is defensive hardening.
1334 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1335 a queue-runner could start a delivery while other operations were ongoing.
1336 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1337 Found and investigated by Tim Stewart. Fix by using the open message data
1338 file handle rather than opening another, and not locally closing it (which
1339 releases a lock) for that case, while creating the temporary .eml format
1340 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1342 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1343 $sender_verify_failure/$recipient_verify_failure to "random".
1345 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1348 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1349 Previously this would segfault.
1351 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1354 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1355 like zero, since the resolver should be doing this for us, But we need one
1356 as a CNAME but no MX presence gets the CNAME returned; we need to check
1357 that doesn't point to an MX to declare it "no MX returned" rather than
1358 "error, loop". A new main option is added so the older capability of
1359 following some limited number of chain links is maintained.
1361 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1363 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1364 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1365 now-deprecated earlier definitions used only specified the range up to TLS
1366 1.2 (in the older-version library docs).
1368 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1370 JH/15 Rework TLS client-side context management. Stop using a global, and
1371 explicitly pass a context around. This enables future use of TLS for
1372 connections to service-daemons (eg. malware scanning) while a client smtp
1373 connection is using TLS; with cutthrough connections this is quite likely.
1375 JH/16 Fix ARC verification to do AS checks in reverse order.
1377 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1379 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1380 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1381 Previously the "utf8" would be re-prepended for every additional message.
1383 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1384 Previously thery were accepted, resulting in issues when attempting to
1385 forward messages to a non-supporting MTA.
1387 PP/02 Let -n work with printing macros too, not just options.
1389 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1390 one parent address was copied, and bogus data was used at delivery-logging
1391 time. Either a crash (after delivery) or bogus log data could result.
1392 Discovery and analysis by Tim Stewart.
1394 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1395 Previously if the string ended mid-character, we did not insert the
1396 promised '?' replacement.
1398 PP/04 Documentation: current string operators work on bytes, not codepoints.
1400 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1401 should pack well giving a smaller memory footprint so better caching and
1402 therefore performance. Group the declarations where this can't be done so
1403 that the byte-sized flag variables are not interspersed among pointer
1404 variables, giving a better chance of good packing by the compiler.
1406 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1407 non-null, to avoid issues with sites running BATV. Previously reports were
1408 sent with an empty envelope sender so looked like bounces.
1410 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1411 The ignore_error flag wasn't being returned from the filter subprocess so
1412 was not set for later routers. Investigation and fix by Matthias Kurz.
1414 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1415 and a msg:complete for the whole, when a message is manually removed using
1416 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1418 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1419 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1420 hope that is portable enough.
1422 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1423 requiring a known-CA anchor certificate; make it now rely entirely on the
1424 TLSA as an anchor. Checking the name on the leaf cert against the name
1425 on the A-record for the host is still done for TA (but not for EE mode).
1427 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1428 included in delivery lines for non-proxied connections, when compiled with
1429 SUPPORT_SOCKS and running with proxy logging enabled.
1431 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1432 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1433 move the existing event to fire before the normal logging of message
1434 failure so that custom logging is bracketed by normal logging.
1436 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1437 msg:fail:internal event. Developement by Matthias Kurz.
1439 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1440 far too small for todays use of crypto signatures stored there. Go all
1441 the way to the max DNS message size of 64kB, even though this might be
1442 overmuch for IOT constrained device use.
1444 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1445 copy a string over itself. The library routine is documented as not
1446 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1448 JH/32 For main options check_spool_space and check_inode_space, where the
1449 platform supports 64b integers, support more than the previous 2^31 kB
1450 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1451 the previous G, M, k.
1453 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1454 $authenticated_fail_id variable on authentication failure. Previously
1457 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1458 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1459 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1460 GNUTLS_SEC_PARAM_MEDIUM.
1462 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1463 side. Previously we would continue as if no SNI had been received.
1465 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1466 "<" character, which should be a list-separator specification, we walked
1467 off past the nul-terimation.
1469 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1470 causes) even when the retry time is not yet met. Previously they were
1471 not, meaning that when (say) an account was over-quota and temp-rejecting,
1472 and multiple senders' messages were queued, only one sender would get
1473 notified on each configured delay_warning cycle.
1475 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1477 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1478 cipher-suites, an error can be left on the stack even for a succeeding
1479 accept; this results in impossible error messages when a later operation
1482 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1483 return error codes indicating retry. Under TLS1.3 this becomes required.
1485 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1486 it only wrote the new authenticators, resulting in a lack of tracking of
1487 peer changes of ESMTP extensions until the next cache flush.
1489 JH/41 Fix the loop reading a message header line to check for integer overflow,
1490 and more-often against header_maxsize. Previously a crafted message could
1491 induce a crash of the recive process; now the message is cleanly rejected.
1493 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1494 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1500 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1501 When redis_servers is set to a list of > 1 element, and the Redis servers
1502 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1503 case of MOVED into a DEFER case instead, thus moving the query onto the
1504 next server in the list. For a cluster of N elements, all N servers must
1505 be defined in redis_servers.
1507 GF/02 Catch and remove uninitialized value warning in exiqsumm
1508 Check for existence of @ARGV before looking at $ARGV[0]
1510 JH/01 Replace the store_release() internal interface with store_newblock(),
1511 which internalises the check required to safely use the old one, plus
1512 the allocate and data copy operations duplicated in both (!) of the
1513 extant use locations.
1515 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1516 modifier. This matches the restriction on the commandline.
1518 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1519 Previously only the last row was returned.
1521 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1522 we assumed that tags in the header were well-formed, and parsed the
1523 element content after inspecting only the first char of the tag.
1524 Assumptions at that stage could crash the receive process on malformed
1527 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1528 While running the DKIM ACL we operate on the Permanent memory pool so that
1529 variables created with "set" persist to the DATA ACL. Also (at any time)
1530 DNS lookups that fail create cache records using the Permanent pool. But
1531 expansions release any allocations made on the current pool - so a dnsdb
1532 lookup expansion done in the DKIM ACL releases the memory used for the
1533 DNS negative-cache, and bad things result. Solution is to switch to the
1534 Main pool for expansions.
1535 While we're in that code, add checks on the DNS cache during store_reset,
1536 active in the testsuite.
1537 Problem spotted, and debugging aided, by Wolfgang Breyha.
1539 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1540 When none of the hosts presented to a transport match an already-open
1541 connection, close it and proceed with the list. Previously we would
1542 queue the message. Spotted by Lena with Yahoo, probably involving
1545 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1546 Previously a spurious "250 OK id=" response was appended to the proper
1549 JH/08 The "support for" informational output now, which built with Content
1550 Scanning support, has a line for the malware scanner interfaces compiled
1551 in. Interface can be individually included or not at build time.
1553 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1554 by the template makefile "src/EDITME". The "STREAM" support for an older
1555 ClamAV interface method is removed.
1557 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1558 rows affected is given instead).
1560 JH/11 The runtime Berkeley DB library version is now additionally output by
1561 "exim -d -bV". Previously only the compile-time version was shown.
1563 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1564 SMTP connection. Previously, when one had more recipients than the
1565 first, an abortive onward connection was made. Move to full support for
1566 multiple onward connections in sequence, handling cutthrough connection
1567 for all multi-message initiating connections.
1569 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1570 routers. Previously, a multi-recipient message would fail to match the
1571 onward-connection opened for the first recipient, and cause its closure.
1573 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1574 a timeout on read on a GnuTLS initiating connection, resulting in the
1575 initiating connection being dropped. This mattered most when the callout
1576 was marked defer_ok. Fix to keep the two timeout-detection methods
1579 JH/15 Relax results from ACL control request to enable cutthrough, in
1580 unsupported situations, from error to silently (except under debug)
1581 ignoring. This covers use with PRDR, frozen messages, queue-only and
1584 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1586 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1587 metadata, resulting in a crash in free().
1589 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1590 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1591 Broken also in d185889f4, with init system revamp.
1593 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1594 Previously we abruptly closed the connection after reading a malware-
1595 found indication; now we go on to read the "scan ok" response line,
1598 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1599 ACL. Previously, a crash would result.
1601 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1602 macro text after a replacement (previously it was only once per line) and
1603 by skipping builtin macros when searching for an uppercase lead character.
1605 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1606 for the build is renamed.
1608 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1609 was allocated for every new TLS startup, meaning one per message. Fix
1610 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1612 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1613 reported the original. Fix to report (as far as possible) the ACL
1614 result replacing the original.
1616 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1617 OpenSSL. Certificate information is loaded for every new TLS startup,
1618 and the resources needed to be freed.
1620 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1622 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1625 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1626 DATA response info to the (existing) per-recipient response info for
1627 the "C=" log element. It can have useful tracking info from the
1628 destination system. Patch from Simon Arlott.
1630 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1631 length value. Previously this would segfault.
1633 HS/02 Support Avast multiline protoocol, this allows passing flags to
1634 newer versions of the scanner.
1636 JH/28 Ensure that variables possibly set during message acceptance are marked
1637 dead before release of memory in the daemon loop. This stops complaints
1638 about them when the debug_store option is enabled. Discovered specifically
1639 for sender_rate_period, but applies to a whole set of variables.
1640 Do the same for the queue-runner and queue-list loops, for variables set
1641 from spool message files. Do the same for the SMTP per-message loop, for
1642 certain variables indirectly set in ACL operations.
1644 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1645 as a multi-recipient message from a mailinglist manager). The coding had
1646 an arbitrary cutoff number of characters while checking for more input;
1647 enforced by writing a NUL into the buffer. This corrupted long / fast
1648 input. The problem was exposed more widely when more pipelineing of SMTP
1649 responses was introduced, and one Exim system was feeding another.
1650 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1651 receiving system, and refused recipients seen by the sending system
1652 (propating to people being dropped from mailing lists).
1653 Discovered and pinpointed by David Carter.
1655 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1656 replaced by the ${authresults } expansion.
1658 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1660 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1661 allows proper process termination in container environments.
1663 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1664 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1666 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1667 and "err_perm", deprecated since 4.83 when the RFC-defined words
1668 "temperror" and "permerror" were introduced.
1670 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1671 transport-filters or DKIM-signing. The restriction was lost in the
1672 consolidation of verify-callout and delivery SMTP handling.
1673 Extend the restriction to also cover ARC-signing.
1675 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1676 in defer=pass mode supply a 450 to the initiator. Previously the message
1679 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1680 tls_require_ciphers is used as before.
1682 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1683 "pass_unscanned". Only tmpfails from the scanner are written to
1684 the paniclog, as they may require admin intervention (permission
1685 denied, license issues). Other scanner errors (like decompression
1686 bombs) do not cause a paniclog entry.
1688 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1689 Previously it was possible to log spurious information in receive log
1692 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1693 triggered odd behaviour from Outlook Express clients.
1695 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1698 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1699 since the IETF WG has not yet settled on that versus the original
1700 "bare" representation.
1702 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1703 Previously the millisecond value corrupted the output.
1704 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1705 corrupted the output.
1711 JH/01 Rework error string handling in TLS interface so that the caller in
1712 more cases is responsible for logging. This permits library-sourced
1713 string to be attached to addresses during delivery, and collapses
1714 pairs of long lines into single ones.
1716 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1717 during configuration. Wildcards are allowed and expanded.
1719 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1720 This permits better logging.
1722 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1723 do not close it down and have the child transport start it up again on
1724 the passed-on TCP connection. Instead, proxy the child (and any
1725 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1726 affected: the continued delivery log lines do not have any DNSSEC, TLS
1727 Certificate or OCSP information. TLS cipher information is still logged.
1729 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1730 identical IP addresses on different listening ports. Will also affect
1733 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1734 add noisy ifdef guards to special-case this sillyness.
1735 Patch from Bernd Kuhls.
1737 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1738 than 255 are no longer allowed.
1740 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1741 Disable the session-cache too, which might reduce our load. Since we
1742 currrectly use a new context for every connection, both as server and
1743 client, there is no benefit for these.
1744 GnuTLS appears to not support tickets server-side by default (we don't
1745 call gnutls_session_ticket_enable_server()) but client side is enabled
1746 by default on recent versions (3.1.3 +) unless the PFS priority string
1749 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1750 <https://reproducible-builds.org/specs/source-date-epoch/>.
1752 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1753 the check for any unsuccessful recipients did not notice the limit, and
1754 erroneously found still-pending ones.
1756 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1757 MSG_MORE. Only in-clear (not on TLS connections).
1759 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1760 transport-filter is involved we can buffer the headers in memory for
1761 creating the signature, and read the spool data file once for the
1762 signature and again for transmission.
1764 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1765 4.77 as the kernel support then wasn't solid, having issues in 64bit
1766 mode. Now, it's been long enough. Add support for FreeBSD also.
1768 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1769 case where the routing stage had gathered several addresses to send to
1770 a host before calling the transport for the first, we previously failed
1771 to close down TLS in the old transport process before passing the TCP
1772 connection to the new process. The new one sent a STARTTLS command
1773 which naturally failed, giving a failed delivery and bloating the retry
1774 database. Investigation and fix prototype from Wolfgang Breyha.
1776 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1777 false-negatives in the check that the sender had not preempted a response
1778 or prompt from Exim (running as a server), due to that code's lack of
1779 awareness of the SMTP input buffering.
1781 PP/04 Add commandline_checks_require_admin option.
1782 Exim drops privileges sanely, various checks such as -be aren't a
1783 security problem, as long as you trust local users with access to their
1784 own account. When invoked by services which pass untrusted data to
1785 Exim, this might be an issue. Set this option in main configuration
1786 AND make fixes to the calling application, such as using `--` to stop
1789 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1790 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1791 responses to those, into a single TLS record each way (this usually means
1792 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1795 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1796 affects you only if you're dancing at the edge of the param size limits.
1797 If you are, and this message makes sense to you, then: raise the
1798 configured limit or use OpenSSL 1.1. Nothing we can do for older
1801 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1802 cmdline element to get the documented default one. Previously it was
1805 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1806 are unsuable for non-message-specific reasons - eg. connection timeout,
1807 banner-time rejection.
1809 JH/16 Fix logging of delivery remote port, when specified by router, under
1812 PP/06 Repair manualroute's ability to take options in any order, even if one
1813 is the name of a transport.
1816 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1818 JH/17 Change the list-building routines interface to use the expanding-string
1819 triplet model, for better allocation and copying behaviour.
1821 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1822 Previously it was constructed the first time a possibly-matching string
1823 was met in the configuration file input during startup; now it is done
1826 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1827 compatible one, to avoid the (poorly documented) possibility of a config
1828 file in the working directory redirecting the DB files, possibly correpting
1829 some existing file. CVE-2017-10140 assigned for BDB.
1831 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1832 cache-hot. Previously, although the result was properly cached, the
1833 initial verify call returned a defer.
1835 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1836 the main verify for receipient in uncached-mode.
1838 JH/22 Retire historical build files to an "unsupported" subdir. These are
1839 defined as "ones for which we have no current evidence of testing".
1841 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1842 if present. Previously it was ignored.
1844 JH/24 Start using specified-initialisers in C structure init coding. This is
1845 a C99 feature (it's 2017, so now considered safe).
1847 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1848 if was a fixed-sized field and bitmask ops via macros; it is now more
1851 PP/07 GitHub PR 56: Apply MariaDB build fix.
1852 Patch provided by Jaroslav Škarvada.
1854 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1855 during Coverity cleanups [4.87 JH/47]
1856 Diagnosis and fix provided by Michael Fischer v. Mollard.
1858 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1859 the right size to place the terminating semicolon on its own folded
1860 line, the header hash was calculated to an incorrect value thanks to
1861 the (relaxed) space the fold became.
1863 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1864 and confused the parent.
1866 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1867 which could crash as a result. This could lead to undeliverable messages.
1869 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1872 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1873 matters on fast-turnover and PID-randomising systems, which were getting
1874 out-of-order delivery.
1876 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1877 a possibly-overlapping copy. The symptom was that "Remote host closed
1878 connection in response to HELO" was logged instead of the actual 4xx
1881 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1882 Previously only that bufferd was discarded, resulting in SYMTP command
1885 JH/32 DKIM: when a message has multiple signatures matching an identity given
1886 in dkim_verify_signers, run the dkim acl once for each. Previously only
1887 one run was done. Bug 2189.
1889 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1890 "panic the current process" to "deliberately defer". The panic log is
1891 still written with the problem list name; the mail and reject logs now
1892 get a temp-reject line for the message that was being handled, saying
1893 something like "domains check lookup or other defer". The SMTP 451
1894 message is still "Temporary local problem".
1896 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1897 A crafted sequence of BDAT commands could result in in-use memory beeing
1898 freed. CVE-2017-16943.
1900 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1901 from SMTP input. Previously it was always done; now only done for DATA
1902 and not BDAT commands. CVE-2017-16944.
1904 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1905 to the message (such as an overlong header line). Previously this was
1906 not done and we did not exit BDAT mode. Followon from the previous item
1907 though a different problem.
1913 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1914 than -2003 did; needs libidn2 in addition to libidn.
1916 JH/02 The path option on a pipe transport is now expanded before use.
1918 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1919 Patch provided by "Björn", documentation fix added too.
1921 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1922 missing a wire-to-host endian conversion.
1924 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1925 close after a BDAT command line could be taken as a following command,
1926 giving a synch failure. Fix by only checking for synch immediately
1927 before acknowledging the chunk.
1929 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1930 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1931 macro. Patches provided by Josh Soref.
1933 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1934 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1935 by IANA as a service extension. However, John Klensin suggests that we
1938 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1939 the dkim code may be unix-mode line endings rather than smtp wire-format
1940 CRLF, so prepend a CR to any bare LF.
1942 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1943 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1945 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1946 the first were themselves being wrongly included in the feed into dkim
1947 processing; with most chunk sizes in use this resulted in an incorrect
1948 body hash calculated value.
1950 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1951 DKIM signature block, for verification. Although advised against by
1952 standards it is specifically not ruled illegal.
1954 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1956 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1957 missing a body hash (the bh= tag).
1959 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1960 It seems that HAProxy sends the Proxy Protocol information in clear and
1961 only then does a TLS startup, so do the same.
1963 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1964 TCP connections (such as for Spamd) unless the daemon successfully set
1965 Fast Open mode on its listening sockets. This fixes breakage seen on
1966 too-old kernels or those not configured for Fast Open, at the cost of
1967 requiring both directions being enabled for TFO, and TFO never being used
1968 by non-daemon-related Exim processes.
1970 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1971 endings, at least on the first header line. Try to canonify any that get
1972 past that check, despite the cost.
1974 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1975 now limited to an arbitrary five deep, while parsing addresses with the
1976 strip_excess_angle_brackets option enabled.
1978 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1979 instead leave the unprompted TLS handshake in socket buffer for the
1980 TLS library to consume.
1982 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1984 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1986 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1987 region in one operation, for speed, and this leaves assigned pointers
1988 dangling. Add checks run only under the testsuite which checks all
1989 variables at a store-reset and panics on a dangling pointer; add code
1990 explicitly nulling out all the variables discovered. Fixes one known
1991 bug: a transport crash, where a dangling pointer for $sending_ip_address
1992 originally assigned in a verify callout, is re-used.
1994 PP/06 Drop '.' from @INC in various Perl scripts.
1996 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1998 PP/08 Reduce a number of compilation warnings under clang; building with
1999 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
2000 should be warning-free.
2002 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
2004 HS/01 Fix portability problems introduced by PP/08 for platforms where
2005 realloc(NULL) is not equivalent to malloc() [SunOS et al].
2007 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
2008 chunk. This allows us to accept broken chunked messages. We need a more
2009 general solution here.
2011 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
2012 already-broken messages in the queue.
2014 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
2016 JH/19 Fix reference counting bug in routing-generated-address tracking.
2022 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
2023 supports it and a size is available (ie. the sending peer gave us one).
2025 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
2026 years of being deprecated). The replacements are the ACLs
2027 acl_smtp_mime and acl_not_smtp_mime.
2029 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
2030 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
2031 or even an in-clear connection were permitted. Now, if the host lookup
2032 was dnssec and dane was requested then the host is only used if the
2033 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
2034 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
2035 if one fails this test.
2036 This means that a poorly-configured remote DNS will make it incommunicado;
2037 but it protects against a DNS-interception attack on it.
2039 JH/04 Bug 1810: make continued-use of an open smtp transport connection
2040 non-noisy when a race steals the message being considered.
2042 JH/05 If main configuration option tls_certificate is unset, generate a
2043 self-signed certificate for inbound TLS connections.
2045 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
2046 in rewrites and routers.
2048 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
2049 and logged a warning sing 4.83; now they are a configuration file error.
2051 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
2052 (lacking @domain). Apply the same qualification processing as RCPT.
2054 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
2056 JH/10 Support ${sha256:} applied to a string (as well as the previous
2059 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
2060 a cutthrough deliver is pending, as we always want to make a connection.
2061 This also avoids re-routing the message when later placing the cutthrough
2062 connection after a verify cache hit.
2063 Do not update it with the verify result either.
2065 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
2066 when routing results in more than one destination address.
2068 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
2069 signing (which inhibits the cutthrough capability). Previously only
2070 the presence of an option was tested; now an expansion evaluating as
2071 empty is permissible (obviously it should depend only on data available
2072 when the cutthrough connection is made).
2074 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
2075 the relevant preceding SMTP command did not note the pipelining mode.
2077 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
2078 Previously they were not counted.
2080 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
2081 as one having no matching records. Previously we deferred the message
2082 that needed the lookup.
2084 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
2085 distinguished as "(=".
2087 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
2088 for missing MX records. Previously it only worked for missing A records.
2090 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
2092 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
2093 after the data-go-ahead and data-ack. Patch from Jason Betts.
2095 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
2096 even for a "none" policy. Patch from Tony Meyer.
2098 JH/22 Fix continued use of a connection for further deliveries. If a port was
2099 specified by a router, it must also match for the delivery to be
2102 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
2103 When one of the recipients of a message was unsuitable for the connection
2104 (has no matching addresses), we lost track of needing to mark it
2105 deferred. As a result mail would be lost.
2107 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
2109 JH/25 Decoding ACL controls is now done using a binary search; the source code
2110 takes up less space and should be simpler to maintain. Merge the ACL
2111 condition decode tables also, with similar effect.
2113 JH/26 Fix problem with one_time used on a redirect router which returned the
2114 parent address unchanged. A retry would see the parent address marked as
2115 delivered, so not attempt the (identical) child. As a result mail would
2118 JH/27 Fix a possible security hole, wherein a process operating with the Exim
2119 UID can gain a root shell. Credit to http://www.halfdog.net/ for
2120 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
2123 JH/28 Enable {spool,log} filesystem space and inode checks as default.
2124 Main config options check_{log,spool}_{inodes,space} are now
2125 100 inodes, 10MB unless set otherwise in the configuration.
2127 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
2128 Previously it only applied to the main-section connection policy
2131 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
2133 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
2134 by me. Added RFC7919 DH primes as an alternative.
2136 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
2137 are not in the system include path.
2139 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
2140 GnuTLS, when a session startup failed (eg because the client disconnected)
2141 Exim did stdio operations after fclose. This was exposed by a recent
2142 change which nulled out the file handle after the fclose.
2144 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2145 signed directly by the cert-signing cert, rather than an intermediate
2146 OCSP-signing cert. This is the model used by LetsEncrypt.
2148 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2150 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2151 an incoming connection.
2153 HS/02 Bug 1802: Do not half-close the connection after sending a request
2156 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2157 fallback to "prime256v1".
2159 JH/34 SECURITY: Use proper copy of DATA command in error message.
2160 Could leak key material. Remotely exploitable. CVE-2016-9963.
2166 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2167 and 3.4.4 - once the server is enabled to respond to an OCSP request
2168 it does even when not requested, resulting in a stapling non-aware
2169 client dropping the TLS connection.
2171 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2172 support variable-length bit vectors. No functional change.
2174 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2175 The I= interface field on outgoing lines is now after the H= remote
2176 host field, same as incoming lines. There is a separate
2177 outgoing_interface log selector which allows you to disable the
2180 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2181 If not running log_selector +smtp_connection the mainlog would be held
2182 open indefinitely after a "too many connections" event, including to a
2183 deleted file after a log rotate. Leave the per net connection logging
2184 leaving it open for efficiency as that will be quickly detected by the
2185 check on the next write.
2187 HS/01 Bug 1671: Fix post transport crash.
2188 Processing the wait-<transport> messages could crash the delivery
2189 process if the message IDs didn't exist for some reason. When
2190 using 'split_spool_directory=yes' the construction of the spool
2191 file name failed already, exposing the same netto behaviour.
2193 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2194 mime_regex ACL conditions.
2196 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2197 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2198 to HELO, local diagnostic string.
2200 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2201 log line to debug. Even when configured with a tls authenticator many
2202 client connections are expected to not authenticate in this way, so
2203 an authenticate fail is not an error.
2205 HS/02 Add the Exim version string to the process info. This way exiwhat
2206 gives some more detail about the running daemon.
2208 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2209 matter for fast-change records such as DNSBLs.
2211 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2212 retry record, even if constant. There may be multiple transports with
2213 different interface settings and the retry behaviour needs to be kept
2216 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2218 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2220 JH/10 Bug 840: fix log_defer_output option of pipe transport
2222 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2223 hosts_randomize. This matters a lot when combined with mua_wrapper.
2225 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2226 ${quote_pgsql:<string>} operator.
2228 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2230 JH/14 Change header file name for freeradius-client. Relevant if compiling
2231 with Radius support; from the Gentoo tree and checked under Fedora.
2233 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2235 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2236 option transport_filter, meaning no filtering.
2238 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2240 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2241 defaults to "*" (all hosts). The variable is now available when not built
2242 with TLS, default unset, mainly to enable keeping the testsuite sane.
2243 If a server certificate is not supplied (via tls_certificate) an error is
2244 logged, and clients will find TLS connections fail on startup. Presumably
2245 they will retry in-clear.
2246 Packagers of Exim are strongly encouraged to create a server certificate
2247 at installation time.
2249 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2250 with the $config_file variable.
2252 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2253 in transport context, after the attempt, and per-recipient. The latter type
2254 is per host attempted. The event data is the error message, and the errno
2255 information encodes the lookup type (A vs. MX) used for the (first) host,
2256 and the trailing two digits of the smtp 4xx response.
2258 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2259 to write to mainlog (or rejectlog, paniclog) in the window between file
2260 creation and permissions/ownership being changed. Particularly affects
2261 installations where exicyclog is run as root, rather than exim user;
2262 result is that the running daemon panics and dies.
2264 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2266 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2267 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2268 "pri" and "weight". Note that the previous implicit priority given by the
2269 list order is no longer honoured.
2271 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2272 for DKIM processing.
2274 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2275 by defining SUPPORT_SOCKS.
2277 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2278 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2279 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2280 variables are renamed to proxy_{local,external}_{address,port}.
2282 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2283 for a build by defining SUPPORT_I18N
2285 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2286 of the query string, and make ${quote_redis:} do that quoting.
2288 JH/29 Move Events support from Experimental to mainline, enabled by default
2289 and removable for a build by defining DISABLE_EVENT.
2291 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2293 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2294 cached by the daemon.
2296 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2297 by defining LOOKUP_REDIS. The libhiredis library is required.
2299 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2300 keys are given for lookup.
2302 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2303 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2304 only supported when built with TLS support. The PolarSSL SHA routines
2305 are still used when the TLS library is too old for convenient support.
2307 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2308 openssl_options), for security. OpenSSL forces this from version 1.1.0
2309 server-side so match that on older versions.
2311 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2312 allocation for $value could be released as the expansion processing
2313 concluded, but leaving the global pointer active for it.
2315 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2316 and to use the domains and local_parts ACL conditions.
2318 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2319 incorrectly not doubled on cutthrough transmission, hence seen as a
2320 body-termination at the receiving system - resulting in truncated mails.
2321 Commonly the sender saw a TCP-level error, and retransmitted the message
2322 via the normal store-and-forward channel. This could result in duplicates
2323 received - but deduplicating mailstores were liable to retain only the
2324 initial truncated version.
2326 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2328 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2330 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2331 we're in there, support oversigning also; bug 1309.
2333 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2335 HS/04 Add support for keep_environment and add_environment options.
2337 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2338 either intentional arithmetic overflow during PRNG, or testing config-
2341 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2342 delivery resulted in actual delivery. Cancel cutthrough before DATA
2345 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2346 rejects a recipient: pass the reject to the originator.
2348 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2349 Many were false-positives and ignorable, but it's worth fixing the
2352 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2353 for the new environment-manipulation done at startup. Move the routines
2354 from being local to tls.c to being global via the os.c file.
2356 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2357 an extract embedded as result-arg for a map, the first arg for extract
2358 is unavailable so we cannot tell if this is a numbered or keyed
2359 extraction. Accept either.
2365 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2368 JH/02 The smtp transport option "multi_domain" is now expanded.
2370 JH/03 The smtp transport now requests PRDR by default, if the server offers
2373 JH/04 Certificate name checking on server certificates, when exim is a client,
2374 is now done by default. The transport option tls_verify_cert_hostnames
2375 can be used to disable this per-host. The build option
2376 EXPERIMENTAL_CERTNAMES is withdrawn.
2378 JH/05 The value of the tls_verify_certificates smtp transport and main options
2379 default to the word "system" to access the system default CA bundle.
2380 For GnuTLS, only version 3.0.20 or later.
2382 JH/06 Verification of the server certificate for a TLS connection is now tried
2383 (but not required) by default. The verification status is now logged by
2384 default, for both outbound TLS and client-certificate supplying inbound
2387 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2390 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2391 Status Notification (bounce) messages are now MIME format per RFC 3464.
2392 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2393 under the control of the dsn_advertise_hosts option, and routers may
2394 have a dsn_lasthop option.
2396 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2397 default, modifiable by a malware= option. The list separator for
2398 the options can now be changed in the usual way. Bug 68.
2400 JH/10 The smtp_receive_timeout main option is now expanded before use.
2402 JH/11 The incoming_interface log option now also enables logging of the
2403 local interface on delivery outgoing connections.
2405 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2406 if the interface and destination host and port all match.
2408 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2411 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2412 Patch from Andrew Lewis.
2414 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2415 now supports optional time-restrictions, weighting, and priority
2416 modifiers per server. Patch originally by <rommer@active.by>.
2418 JH/16 The spamd_address main option now supports a mixed list of local
2419 and remote servers. Remote servers can be IPv6 addresses, and
2420 specify a port-range.
2422 JH/17 Bug 68: The spamd_address main option now supports an optional
2423 timeout value per server.
2425 JH/18 Bug 1581: Router and transport options headers_add/remove can
2426 now have the list separator specified.
2428 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2431 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2434 JH/21 Support for the A6 type of dns record is withdrawn.
2436 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2437 rather than the verbs used.
2439 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2440 from 255 to 1024 chars.
2442 JH/24 Verification callouts now attempt to use TLS by default.
2444 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2445 are generic router options now. The defaults didn't change.
2447 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2448 Original patch from Alexander Shikoff, worked over by JH.
2450 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2451 files if ZCAT_COMMAND is not executable.
2453 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2455 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2457 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2458 Normally benign, it bites when the pair was led to by a CNAME;
2459 modern usage is to not canonicalize the domain to a CNAME target
2460 (and we were inconsistent anyway for A-only vs AAAA+A).
2462 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2464 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2465 when evaluating $sender_host_dnssec.
2467 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2468 $sender_helo_dnssec variable.
2470 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2472 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2474 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2476 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2477 documented as working, but never had. Support all but $spam_report.
2479 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2480 added for tls authenticator.
2482 HS/03 Add perl_taintmode main config option
2488 TL/01 When running the test suite, the README says that variables such as
2489 no_msglog_check are global and can be placed anywhere in a specific
2490 test's script, however it was observed that placement needed to be near
2491 the beginning for it to behave that way. Changed the runtest perl
2492 script to read through the entire script once to detect and set these
2493 variables, reset to the beginning of the script, and then run through
2494 the script parsing/test process like normal.
2496 TL/02 The BSD's have an arc4random API. One of the functions to induce
2497 adding randomness was arc4random_stir(), but it has been removed in
2498 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2499 function when detected.
2501 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2502 cause callback expansion.
2504 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2505 syntax errors in an expansion can be treated as a string instead of
2506 logging or causing an error, due to the internal use of bool_lax
2507 instead of bool when processing it.
2509 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2510 server certificates when making smtp deliveries.
2512 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2514 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2516 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2518 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2519 Merged patch from Sebastian Wiedenroth.
2521 JH/05 Fix results-pipe from transport process. Several recipients, combined
2522 with certificate use, exposed issues where response data items split
2523 over buffer boundaries were not parsed properly. This eventually
2524 resulted in duplicates being sent. This issue only became common enough
2525 to notice due to the introduction of connection certificate information,
2526 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2528 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2529 size buffer was used, resulting in syntax errors when an expansion
2532 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2533 version 3.3.6 or later.
2535 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2536 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2537 both become "event_action", the variables become $event_name, $event_data
2538 and $event_defer_errno. There is a new variable $verify_mode, usable in
2539 routers, transports and related events. The tls:cert event is now also
2540 raised for inbound connections, if the main configuration event_action
2543 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2544 early OCSP support, but no stapling (appears to be less than 1.0.0).
2546 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2547 server certificate names available under the smtp transport option
2548 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2551 JH/10 Time-related extraction expansions from certificates now use the main
2552 option "timezone" setting for output formatting, and are consistent
2553 between OpenSSL and GnuTLS compilations. Bug 1541.
2555 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2556 encoded parameter in the incoming message. Bug 1558.
2558 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2559 include certificate info, eximon was claiming there were spoolfile
2562 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2564 JH/14 Log delivery-related information more consistently, using the sequence
2565 "H=<name> [<ip>]" wherever possible.
2567 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2568 are problematic for Debian distribution, omit them from the release
2571 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2573 JH/16 Fix string representation of time values on 64bit time_t architectures.
2576 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2577 output list separator was used.
2582 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2583 checkers that were complaining about end of non-void function with no
2586 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2587 This was a regression introduced in 4.83 by another bugfix.
2589 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2591 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2592 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2598 TF/01 Correctly close the server side of TLS when forking for delivery.
2600 When a message was received over SMTP with TLS, Exim failed to clear up
2601 the incoming connection properly after forking off the child process to
2602 deliver the message. In some situations the subsequent outgoing
2603 delivery connection happened to have the same fd number as the incoming
2604 connection previously had. Exim would try to use TLS and fail, logging
2605 a "Bad file descriptor" error.
2607 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2608 utilities have not been installed.
2610 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2611 temporary space as the ACL may create new global variables.
2613 TL/01 LDAP support uses per connection or global context settings, depending
2614 upon the detected version of the libraries at build time.
2616 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2617 to extract and use the src ip:port in logging and expansions as if it
2618 were a direct connection from the outside internet. PPv2 support was
2619 updated based on HAProxy spec change in May 2014.
2621 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2623 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2624 Properly escape header and check for NULL return.
2626 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2629 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2631 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2632 characters in header names, implemented as a verify condition.
2633 Contributed by Michael Fischer v. Mollard.
2635 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2636 results permerror and temperror. Previous values are deprecated but
2637 still accepted. In a future release, err_perm and err_temp will be
2638 completely removed, which will be a backward incompatibility if the
2639 ACL tests for either of these two old results. Patch contributed by
2640 user bes-internal on the mailing list.
2642 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2644 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2645 selectors, in both main and reject logs.
2647 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2650 JH/07 Add malware type "sock" for talking to simple daemon.
2652 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2654 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2655 routers/transports under cutthrough routing.
2657 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2658 numbers. Touch up "bool" conditional to keep the same definition.
2660 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2662 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2664 JH/12 Expand items in router/transport headers_add or headers_remove lists
2665 individually rather than the list as a whole. Bug 1452.
2667 Required for reasonable handling of multiple headers_ options when
2668 they may be empty; requires that headers_remove items with embedded
2669 colons must have them doubled (or the list-separator changed).
2671 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2672 view the policy declared in the DMARC record. Currently, $dmarc_status
2673 is a combined value of both the record presence and the result of the
2676 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2678 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2679 dnslookup router and the smtp transport (applying to the forward
2682 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2683 of ldap servers used for a specific lookup. Patch provided by Heiko
2686 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2687 New variable $lookup_dnssec_authenticated for observability.
2689 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2690 Patch submitted by Lars Timman.
2692 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2694 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2695 Requires trusted mode and valid format message id, aborts otherwise.
2696 Patch contributed by Heiko Schlichting.
2698 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2699 certextract with support for various fields. Bug 1358.
2701 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2702 is requested by default, modifiable by smtp transport option
2705 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2706 operate on certificate variables to give certificate fingerprints
2707 Also new ${sha256:cert_variable}.
2709 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2711 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2712 Christian Aistleitner.
2714 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2716 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2717 file. Patch from Wolfgang Breyha.
2719 JH/25 Expand the coverage of the delivery $host and $host_address to
2720 client authenticators run in verify callout. Bug 1476.
2722 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2723 align with daemon_smtp_ports. Bug 72.
2725 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2726 support and error reporting did not work properly.
2728 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2729 and is readable. Patch from Andrew Colin Kissa.
2731 TL/14 Enhance documentation of ${run expansion and how it parses the
2732 commandline after expansion, particularly in the case when an
2733 unquoted variable expansion results in an empty value.
2735 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2737 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2738 by renaming away from it. Addresses GH issue 15, reported by
2741 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2743 TL/15 SECURITY: prevent double expansion in math comparison functions
2744 (can expand unsanitized data). Not remotely exploitable.
2751 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2753 PP/02 Make -n do something, by making it not do something.
2754 When combined with -bP, the name of an option is not output.
2756 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2759 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2760 $sender_host_name and config options to manage this, and basic check
2763 PP/05 DSCP support for outbound connections and control modifier for inbound.
2765 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2766 (Only plugin which currently uses this is kerberos4, which nobody should
2767 be using, but we should make it available and other future plugins might
2768 conceivably use it, even though it would break NAT; stuff *should* be
2769 using channel bindings instead).
2771 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2772 name; added for Sendmail compatibility; requires admin caller.
2773 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2774 just ignore it); requires trusted caller.
2775 Also parse but ignore: -Ac -Am -X<logfile>
2778 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2780 TL/02 Add +smtp_confirmation as a default logging option.
2782 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2783 Patch by Magnus Holmgren from 2007-02-20.
2785 TL/04 Bugzilla 1281 - Spec typo.
2786 Bugzilla 1283 - Spec typo.
2787 Bugzilla 1290 - Spec grammar fixes.
2789 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2791 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2793 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2794 mailing list by by Dmitry Isaikin.
2796 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2798 JH/02 Support "G" suffix to numbers in ${if comparisons.
2800 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2802 NM/01 Bugzilla 1197 - Spec typo
2803 Bugzilla 1196 - Spec examples corrections
2805 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2807 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2808 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2811 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2812 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2814 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2815 "acl {{name}{arg}...}", and optional args on acl condition
2818 JH/05 Permit multiple router/transport headers_add/remove lines.
2820 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2822 JH/07 Avoid using a waiting database for a single-message-only transport.
2823 Performance patch from Paul Fisher. Bugzilla 1262.
2825 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2828 JH/09 Add $headers_added variable, with content from use of ACL modifier
2829 add_header (but not yet added to the message). Bugzilla 199.
2831 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2832 Pulled from Bugzilla 817 by Wolfgang Breyha.
2834 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2836 (nb: this is the same fix as in Exim 4.80.1)
2838 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2841 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2844 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2846 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2847 advertise SMTP AUTH mechanism to us, instead of a generic
2848 protocol violation error. Also, make Exim more robust to bad
2849 data from the Dovecot auth socket.
2851 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2853 When a queue runner is handling a message, Exim first routes the
2854 recipient addresses, during which it prunes them based on the retry
2855 hints database. After that it attempts to deliver the message to
2856 any remaining recipients. It then updates the hints database using
2859 So if a recipient address works intermittently, it can get repeatedly
2860 deferred at routing time. The retry hints record remains fresh so the
2861 address never reaches the final cutoff time.
2863 This is a fairly common occurrence when a user is bumping up against
2864 their storage quota. Exim had some logic in its local delivery code
2865 to deal with this. However it did not apply to per-recipient defers
2866 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2868 This change adds a proper retry rule check during routing so that the
2869 final cutoff time is checked against the message's age. We only do
2870 this check if there is an address retry record and there is not a
2871 domain retry record; this implies that previous attempts to handle
2872 the address had the retry_use_local_parts option turned on. We use
2873 this as an approximation for the destination being like a local
2874 delivery, as in LMTP.
2876 I suspect this new check makes the old local delivery cutoff check
2877 redundant, but I have not verified this so I left the code in place.
2879 TF/02 Correct gecos expansion when From: is a prefix of the username.
2881 Test 0254 submits a message to Exim with the header
2885 When I ran the test suite under the user fanf2, Exim expanded
2886 the header to contain my full name, whereas it should have added
2887 a Resent-Sender: header. It erroneously treats any prefix of the
2888 username as equal to the username.
2890 This change corrects that bug.
2892 GF/01 DCC debug and logging tidyup
2893 Error conditions log to paniclog rather than rejectlog.
2894 Debug lines prefixed by "DCC: " to remove any ambiguity.
2896 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2898 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2899 Bug spotted by Jeremy Harris; was flawed since initial commit.
2900 Would have resulted in OCSP responses post-SNI triggering an Exim
2901 NULL dereference and crash.
2903 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2905 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2906 Bug detection, analysis and fix by Samuel Thibault.
2907 Bugzilla 1331, Debian bug #698092.
2909 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2911 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2912 Server implementation by Todd Lyons, client by JH.
2913 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2914 config variable "prdr_enable" controls whether the server
2915 advertises the facility. If the client requests PRDR a new
2916 acl_data_smtp_prdr ACL is called once for each recipient, after
2917 the body content is received and before the acl_smtp_data ACL.
2918 The client is controlled by both of: a hosts_try_prdr option
2919 on the smtp transport, and the server advertisement.
2920 Default client logging of deliveries and rejections involving
2921 PRDR are flagged with the string "PRDR".
2923 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2924 fclose(). Diagnosis by Todd Lyons.
2926 PP/17 Update configure.default to handle IPv6 localhost better.
2927 Patch by Alain Williams (plus minor tweaks).
2930 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2931 This is now consistent with GnuTLS, and is now documented: the
2932 previous undocumented portable approach to treating the option as
2933 unset was to force an expansion failure. That still works, and
2934 an empty string is now equivalent.
2936 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2937 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2938 not performing validation itself.
2940 PP/20 Added force_command boolean option to pipe transport.
2941 Patch from Nick Koston, of cPanel Inc.
2943 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2946 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2948 PP/21 Fix eximon continuous updating with timestamped log-files.
2949 Broken in a format-string cleanup in 4.80, missed when I repaired the
2950 other false fix of the same issue.
2951 Report and fix from Heiko Schlichting.
2954 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2955 Report from Prashanth Katuri.
2957 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2958 It's SecureTransport, so affects any MacOS clients which use the
2959 system-integrated TLS libraries, including email clients.
2961 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2962 using a MIME ACL for non-SMTP local injection.
2963 Report and assistance in diagnosis by Warren Baker.
2965 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2967 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2969 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2970 last id that failed so it may be referenced in subsequent ACL's.
2972 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2975 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2976 ldap library initialization, allowing self-signed CA's to be
2977 used. Also properly sets require_cert option later in code by
2978 using NULL (global ldap config) instead of ldap handle (per
2979 session). Bug diagnosis and testing by alxgomz.
2981 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2982 the src/util/ subdirectory.
2984 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2985 renamed to Transport Post Delivery Action by Jeremy Harris, as
2988 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2989 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2990 redis_servers = needs to be configured which will be used by the redis
2991 lookup. Patch from Warren Baker, of The Packet Hub.
2993 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2995 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2996 hostname or reverse DNS when processing a host list. Used suggestions
2997 from multiple comments on this bug.
2999 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
3001 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
3002 Missed a few lines, added it to make the runtest require no keyboard
3005 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
3006 contains upper case chars. Make router use caseful_local_part.
3008 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
3009 support when GnuTLS has been built with p11-kit.
3015 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
3017 This, or similar/improved, will also be change PP/11 of 4.82.
3023 PP/01 Handle short writes when writing local log-files.
3024 In practice, only affects FreeBSD (8 onwards).
3025 Bugzilla 1053, with thanks to Dmitry Isaikin.
3027 NM/01 Bugzilla 949 - Documentation tweak
3029 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
3032 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
3034 PP/02 Implemented gsasl authenticator.
3036 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
3038 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
3039 `pkg-config foo` for cflags/libs.
3041 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
3042 with rest of GSASL and with heimdal_gssapi.
3044 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
3045 `pkg-config foo` for cflags/libs for the TLS implementation.
3047 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
3048 properties get this fed in as external SSF. A number of robustness
3049 and debugging improvements to the cyrus_sasl authenticator.
3051 PP/08 cyrus_sasl server now expands the server_realm option.
3053 PP/09 Bugzilla 1214 - Log authentication information in reject log.
3054 Patch by Jeremy Harris.
3056 PP/10 Added dbmjz lookup type.
3058 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
3060 PP/12 MAIL args handles TAB as well as SP, for better interop with
3061 non-compliant senders.
3062 Analysis and variant patch by Todd Lyons.
3064 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
3065 Bug report from Lars Müller <lars@samba.org> (via SUSE),
3066 Patch from Dirk Mueller <dmueller@suse.com>
3068 PP/13 tls_peerdn now print-escaped for spool files.
3069 Observed some $tls_peerdn in wild which contained \n, which resulted
3070 in spool file corruption.
3072 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
3073 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
3074 or write after TLS renegotiation, which otherwise led to messages
3077 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
3078 as a tracking header (ie: a signed header comes before the signature).
3079 Patch from Wolfgang Breyha.
3081 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
3082 comma-sep list; embedded commas doubled.
3084 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
3086 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
3088 Report and patch from Dmitry Banschikov.
3090 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
3091 Removed SSL_clear() after SSL_new() which led to protocol negotiation
3092 failures. We appear to now support TLS1.1+ with Exim.
3094 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
3095 lets Exim select keys and certificates based upon TLS SNI from client.
3096 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
3097 before an outbound SMTP session. New log_selector, +tls_sni.
3099 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
3100 NULL dereference. Report and patch from Alun Jones.
3102 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
3103 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
3104 Not seeing resolver debug output on NetBSD, but suspect this is a
3105 resolver implementation change.
3107 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
3108 Left warnings. Added "eximon gdb" invocation mode.
3110 PP/21 Defaulting "accept_8bitmime" to true, not false.
3112 PP/22 Added -bw for inetd wait mode support.
3114 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
3115 locate the relevant includes and libraries. Made this the default.
3117 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
3118 Bugzilla 1246, report and most of solution from Tomasz Kusy.
3120 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
3121 This may cause build issues on older platforms.
3123 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
3124 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
3125 gnutls_require_mac & gnutls_require_protocols (no longer supported).
3126 Added SNI support via GnuTLS too.
3127 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
3129 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
3131 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
3132 Applied second patch from Janne, implementing suggestion to default
3133 multiple-strings-in-record handling to match SPF spec.
3135 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
3137 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
3138 read-only, out of scope).
3139 Patch from Wolfgang Breyha, report from Stuart Northfield.
3141 PP/29 Fix three issues highlighted by clang analyser static analysis.
3142 Only crash-plausible issue would require the Cambridge-specific
3143 iplookup router and a misconfiguration.
3144 Report from Marcin Mirosław.
3146 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3148 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3149 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3150 As part of this, removing so much warning spew let me fix some minor
3151 real issues in debug logging.
3153 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3154 assignment on my part. Fixed.
3156 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3157 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3158 Janne Snabb (who went above and beyond: thank you).
3160 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3161 string otherwise requires a connection and a bunch more work and it's
3162 relatively easy to get wrong. Should also expose TLS library linkage
3165 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3166 64-bit ${eval} (JH/03).
3168 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3169 GNU libc to support some of the 64-bit stuff, should not lead to
3170 conflicts. Defined before os.h is pulled in, so if a given platform
3171 needs to override this, it can.
3173 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3174 protection layer was required, which is not implemented.
3175 Bugzilla 1254, patch from Wolfgang Breyha.
3177 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3178 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3179 tls_dhparam take prime identifiers. Also unbreak combination of
3180 OpenSSL+DH_params+TLSSNI.
3182 PP/39 Disable SSLv2 by default in OpenSSL support.
3188 PP/01 Solaris build fix for Oracle's LDAP libraries.
3189 Bugzilla 1109, patch from Stephen Usher.
3191 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3193 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3196 TF/02 Fix a couple more cases where we did not log the error message
3197 when unlink() failed. See also change 4.74-TF/03.
3199 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3200 lock up or crash if it happened to be inside a call to libc when it
3201 got a SIGUSR1 from exiwhat.
3203 The SIGUSR1 handler appends the current process status to the process
3204 log which is later printed by exiwhat. It used to use the general
3205 purpose logging code to do this, but several functions it calls are
3206 not safe for signals.
3208 The new output code in the SIGUSR1 handler is specific to the process
3209 log, and simple enough that it's easy to inspect for signal safety.
3210 Removing some special cases also simplifies the general logging code.
3211 Removing the spurious timestamps from the process log simplifies
3214 TF/04 Improved ratelimit ACL condition.
3216 The /noupdate option has been deprecated in favour of /readonly which
3217 has clearer semantics. The /leaky, /strict, and /readonly update modes
3218 are mutually exclusive. The update mode is no longer included in the
3219 database key; it just determines when the database is updated. (This
3220 means that when you upgrade Exim will forget old rate measurements.)
3222 Exim now checks that the per_* options are used with an update mode that
3223 makes sense for the current ACL. For example, when Exim is processing a
3224 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3225 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3226 must specify per_mail/readonly. If you omit the update mode it defaults to
3227 /leaky where that makes sense (as before) or /readonly where required.
3229 The /noupdate option is now undocumented but still supported for
3230 backwards compatibility. It is equivalent to /readonly except that in
3231 ACLs where /readonly is required you may specify /leaky/noupdate or
3232 /strict/noupdate which are treated the same as /readonly.
3234 A useful new feature is the /count= option. This is a generalization
3235 of the per_byte option, so that you can measure the throughput of other
3236 aggregate values. For example, the per_byte option is now equivalent
3237 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3239 The per_rcpt option has been generalized using the /count= mechanism
3240 (though it's more complicated than the per_byte equivalence). When it is
3241 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3242 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3243 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3244 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3245 Note that using per_rcpt with a non-readonly update mode in more than
3246 one ACL will cause the recipients to be double-counted. (The per_mail
3247 and per_byte options don't have this problem.)
3249 The handling of very low rates has changed slightly. If the computed rate
3250 is less than the event's count (usually one) then this event is the first
3251 after a long gap. In this case the rate is set to the same as this event's
3252 count, so that the first message of a spam run is counted properly.
3254 The major new feature is a mechanism for counting the rate of unique
3255 events. The new per_addr option counts the number of different
3256 recipients that someone has sent messages to in the last time period. It
3257 behaves like per_rcpt if all the recipient addresses are different, but
3258 duplicate recipient addresses do not increase the measured rate. Like
3259 the /count= option this is a general mechanism, so the per_addr option
3260 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3261 example, measure the rate that a client uses different sender addresses
3262 with the options per_mail/unique=$sender_address. There are further
3263 details in the main documentation.
3265 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3267 TF/06 Removed a few PCRE remnants.
3269 TF/07 Automatically extract Exim's version number from tags in the git
3270 repository when doing development or release builds.
3272 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3273 Bugzilla 879. Patch from Paul Fisher.
3275 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3276 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3279 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3281 PP/05 Variable $av_failed, true if the AV scanner deferred.
3282 Bugzilla 1078. Patch from John Horne.
3284 PP/06 Stop make process more reliably on build failure.
3285 Bugzilla 1087. Patch from Heiko Schlittermann.
3287 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3288 Bugzilla 1089. Patch from Heiko Schlittermann.
3290 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3291 Bugzilla 1131. Patch from Holger Weiß.
3293 PP/09 Handle IPv6 addresses with SPF.
3294 Bugzilla 860. Patch from Wolfgang Breyha.
3296 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3298 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3301 PP/11 match_* no longer expand right-hand-side by default.
3302 New compile-time build option, EXPAND_LISTMATCH_RHS.
3303 New expansion conditions, "inlist", "inlisti".
3305 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3307 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3309 PP/14 fix log_write() format string regression from TF/03.
3310 Bugzilla 1152. Patch from Dmitry Isaikin.
3316 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3318 PP/02 Harmonised TLS library version reporting; only show if debugging.
3319 Layout now matches that introduced for other libraries in 4.74 PP/03.
3321 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3323 PP/04 New "dns_use_edns0" global option.
3325 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3328 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3329 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3331 TK/01 Updated PolarSSL code to 0.14.2.
3332 Bugzilla 1097. Patch from Andreas Metzler.
3334 PP/07 Catch divide-by-zero in ${eval:...}.
3335 Fixes bugzilla 1102.
3337 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3340 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3341 format-string attack -- SECURITY: remote arbitrary code execution.
3343 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3344 time unintentionally subject to list matching rules, letting the header
3345 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3346 arbitrary string expansion). This allowed for information disclosure.
3348 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3349 INT_MIN/-1 -- value coerced to INT_MAX.
3355 NM/01 Workaround for PCRE version dependency in version reporting
3358 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3359 This fixes portability to compilers other than gcc, notably
3360 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3362 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3363 makefiles for portability to HP-UX and POSIX correctness.
3365 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3366 Also via indented variable definition in the Makefile.
3367 (Debugging by Oliver Heesakkers).
3369 PP/02 Restore caching of spamd results with expanded spamd_address.
3370 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3372 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3373 Improves build reliability. Fix from: Frank Elsner
3375 NM/02 Fix wide character breakage in the rfc2047 coding
3376 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3378 NM/03 Allow underscore in dnslist lookups
3379 Fixes bug 1026. Patch from Graeme Fowler
3381 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3382 Code patches from Adam Ciarcinski of NetBSD.
3384 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3387 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3388 is logged, to avoid truncation. Patch from John Horne.
3390 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3391 Patch from Jakob Hirsch.
3393 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3394 SQL string expansion failure details.
3395 Patch from Andrey Oktyabrski.
3397 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3398 Patch from Simon Arlott.
3400 PP/09 New lookups functionality failed to compile on old gcc which rejects
3401 extern declarations in function scope.
3402 Patch from Oliver Fleischmann
3404 PP/10 Use sig_atomic_t for flags set from signal handlers.
3405 Check getgroups() return and improve debugging.
3406 Fixed developed for diagnosis in bug 927 (which turned out to be
3409 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3410 Patch from Mark Zealey.
3412 PP/12 Bugzilla 1056: Improved spamd server selection.
3413 Patch from Mark Zealey.
3415 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3416 Based on patch from Heiko Schlittermann.
3418 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3419 Patch from Uwe Doering, sign-off by Michael Haardt.
3421 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3422 variable declaration deep within a block. Bug and patch from
3425 PP/15 lookups-Makefile IRIX compatibility coercion.
3427 PP/16 Make DISABLE_DKIM build knob functional.
3429 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3430 Patch by Simon Arlott
3432 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3433 variable argument macros. Our copy now differs from upstream.
3439 TF/01 Failure to get a lock on a hints database can have serious
3440 consequences so log it to the panic log.
3442 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3443 controlled using the smtp_confirmation log selector.
3445 TF/03 Include the error message when we fail to unlink a spool file.
3447 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3448 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3449 for maintaining out-of-tree patches for some time.
3451 PP/01 Bugzilla 139: Documentation and portability issues.
3452 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3453 Handle per-OS dynamic-module compilation flags.
3455 PP/02 Let /dev/null have normal permissions.
3456 The 4.73 fixes were a little too stringent and complained about the
3457 permissions on /dev/null. Exempt it from some checks.
3458 Reported by Andreas M. Kirchwitz.
3460 PP/03 Report version information for many libraries, including
3461 Exim version information for dynamically loaded libraries. Created
3462 version.h, now support a version extension string for distributors
3463 who patch heavily. Dynamic module ABI change.
3465 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3466 privilege escalation vulnerability whereby the Exim run-time user
3467 can cause root to append content of the attacker's choosing to
3470 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3473 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3474 If dropping privileges for untrusted macros, we disabled normal logging
3475 on the basis that it would fail; for the Exim run-time user, this is not
3476 the case, and it resulted in successful deliveries going unlogged.
3477 Fixed. Reported by Andreas Metzler.
3483 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3484 only prepend for the Resent-* case. Fixes regression introduced in
3485 Exim 4.70 by NM/22 for Bugzilla 607.
3487 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3488 increasing numbers of administrators be bitten by this.
3490 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3492 PP/03 Bugzilla 994: added openssl_options main configuration option.
3494 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3496 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3498 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3500 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3501 without a peer certificate, leading to a segfault because of an
3502 assumption that peers always have certificates. Be a little more
3503 paranoid. Problem reported by Martin Tscholak.
3505 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3506 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3507 NB: ClamAV planning to remove STREAM in "middle of 2010".
3508 CL also introduces -bmalware, various -d+acl logging additions and
3509 more caution in buffer sizes.
3511 PP/09 Implemented reverse_ip expansion operator.
3513 PP/10 Bugzilla 937: provide a "debug" ACL control.
3515 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3517 PP/12 Bugzilla 973: Implement --version.
3519 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3521 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3523 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3525 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3526 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3527 ignore trailing whitespace.
3529 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3531 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3534 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3535 Notification from Dr Andrew Aitchison.
3537 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3538 ExtendedDetectionInfo response format.
3539 Notification from John Horne.
3541 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3544 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3545 XSL and documented dependency on system catalogs, with examples of how
3548 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3551 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3552 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3553 configuration file which is writeable by the Exim user or group.
3555 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3556 of configuration files to cover files specified with the -C option if
3557 they are going to be used with root privileges, not just the default
3560 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3561 option (effectively making it always true).
3563 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3564 files to be used while preserving root privileges.
3566 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3567 that rogue child processes cannot use them.
3569 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3570 run-time user, instead of root.
3572 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3573 Exim run-time user without dropping privileges.
3575 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3576 result string, instead of calling string_vformat() twice with the same
3579 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3580 for other users. Others should always drop root privileges if they use
3581 -C on the command line, even for a whitelisted configure file.
3583 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3585 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3591 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3592 $data_path, and $header_path variables; fixed documentation bugs and
3595 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3596 exipick to access non-standard spools, including the "frozen" queue
3599 NM/01 Bugzilla 965: Support mysql stored procedures.
3600 Patch from Alain Williams
3602 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3604 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3605 Patch from Andreas Metzler
3607 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3608 Patch from Kirill Miazine
3610 NM/05 Bugzilla 671: Added umask to procmail example.
3612 JJ/03 installed exipick 20100323.0, fixing doc bug
3614 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3615 directory. Notification and patch from Dan Rosenberg.
3617 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3619 TK/02 Improve log output when DKIM signing operation fails.
3621 MH/01 Treat the transport option dkim_domain as a colon separated
3622 list, not as a single string, and sign the message with each element,
3623 omitting multiple occurences of the same signer.
3625 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3626 Bugzilla 985, 986. Patch by Simon Arlott
3628 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3629 Patch by Simon Arlott
3631 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3632 MBX locking. Notification from Dan Rosenberg.
3638 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3640 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3642 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3644 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3646 NM/04 Bugzilla 915: Flag broken perl installation during build.
3652 TK/01 Added patch by Johannes Berg that expands the main option
3653 "spamd_address" if it starts with a dollar sign.
3655 TK/02 Write list of recipients to X-Envelope-Sender header when building
3656 the mbox-format spool file for content scanning (suggested by Jakob
3659 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3660 (http://www.dcc-servers.net/) support via dccifd. Activated by
3661 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3663 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3664 by Mark Daniel Reidel <mr@df.eu>.
3666 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3667 When building exim an external PCRE library is now needed -
3668 PCRE is a system library on the majority of modern systems.
3669 See entry on PCRE_LIBS in EDITME file.
3671 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3672 conversation. Added nologin parameter to request.
3673 Patch contributed by Kirill Miazine.
3675 TF/01 Do not log submission mode rewrites if they do not change the address.
3677 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3679 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3680 log files in place. Contributed by Roberto Lima.
3682 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3684 TF/03 Bugzilla 615: When checking the local_parts router precondition
3685 after a local_part_suffix or local_part_prefix option, Exim now
3686 does not use the address's named list lookup cache, since this
3687 contains cached lookups for the whole local part.
3689 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3690 Robert Millan. Documentation is in experimental-spec.txt.
3692 TF/04 Bugzilla 668: Fix parallel build (make -j).
3694 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3696 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3697 Patch provided by Jan Srzednicki.
3699 TF/05 Leading white space used to be stripped from $spam_report which
3700 wrecked the formatting. Now it is preserved.
3702 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3703 that they are available at delivery time.
3705 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3707 TF/08 TLS error reporting now respects the incoming_interface and
3708 incoming_port log selectors.
3710 TF/09 Produce a more useful error message if an SMTP transport's hosts
3711 setting expands to an empty string.
3713 NM/06 Bugzilla 744: EXPN did not work under TLS.
3714 Patch provided by Phil Pennock.
3716 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3717 Patch provided by Richard Godbee.
3719 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3720 acl_smtp_notquit, added index entry.
3722 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3723 Patch provided by Eugene Bujak.
3725 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3726 accept(). Patch provided by Maxim Dounin.
3728 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3729 Patch provided by Phil Pennock.
3731 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3733 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3734 Patch provided by Brad "anomie" Jorsch.
3736 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3737 Patch provided by Dean Brooks.
3739 TK/05 Add native DKIM support (does not depend on external libraries).
3741 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3742 Patch provided by Graeme Fowler.
3744 NM/16 Bugzilla 851: Documentation example syntax fix.
3746 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3748 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3751 NM/19 Bugzilla 745: TLS version reporting.
3752 Patch provided by Phil Pennock.
3754 NM/20 Bugzilla 167: bool: condition support.
3755 Patch provided by Phil Pennock.
3757 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3758 clients. Patch provided by Phil Pennock.
3760 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3761 Patch provided by Brad "anomie" Jorsch.
3763 NM/23 Bugzilla 687: Fix misparses in eximstats.
3764 Patch provided by Heiko Schlittermann.
3766 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3767 Patch provided by Heiko Schlittermann.
3769 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3770 plus update to original patch.
3772 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3774 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3775 Patch provided by David Brownlee.
3777 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3779 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3781 NM/30 Bugzilla 888: TLS documentation bugfixes.
3783 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3785 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3786 Unlike the original bugzilla I have changed all shell scripts in src tree.
3788 NM/33 Bugzilla 898: Transport filter timeout fix.
3789 Patch by Todd Rinaldo.
3791 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3792 Patch by Serge Demonchaux.
3794 NM/35 Bugzilla 39: Base64 decode bug fixes.
3795 Patch by Jakob Hirsch.
3797 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3799 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3801 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3803 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3809 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3810 ALT-N's libdkim that I have put here:
3811 http://duncanthrax.net/exim-experimental/
3813 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3814 were called 'true' and it seems that C99 defines that as a reserved
3815 keyword to be used with 'bool' variable types. That means you could
3816 not include C99-style headers which use bools without triggering
3817 build errors in sieve.c.
3819 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3820 as mailq or other aliases. Changed the --help handling significantly
3821 to do whats expected. exim_usage() emits usage/help information.
3823 SC/01 Added the -bylocaldomain option to eximstats.
3825 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3827 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3829 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3835 PH/01 Another patch from the Sieve maintainer.
3837 PH/02 When an IPv6 address is converted to a string for single-key lookup
3838 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3839 dots are used instead of colons so that keys in lsearch files need not
3840 contain colons. This was done some time before quoting was made available
3841 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3842 (notated using the quote facility) so as to distinguish them from IPv4
3843 keys. This meant that lookups for IP addresses in host lists did not work
3844 for iplsearch lookups.
3846 This has been fixed by arranging for IPv6 addresses to be expressed with
3847 colons if the lookup type is iplsearch. This is not incompatible, because
3848 previously such lookups could never work.
3850 The situation is now rather anomalous, since one *can* have colons in
3851 ordinary lsearch keys. However, making the change in all cases is
3852 incompatible and would probably break a number of configurations.
3854 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3857 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3858 conversion specification without a maximum field width, thereby enabling
3859 a rogue spamd server to cause a buffer overflow. While nobody in their
3860 right mind would setup Exim to query an untrusted spamd server, an
3861 attacker that gains access to a server running spamd could potentially
3862 exploit this vulnerability to run arbitrary code as the Exim user.
3864 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3865 $primary_hostname instead of what libspf2 thinks the hosts name is.
3867 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3868 a directory entry by the name of the lookup key. Previously, if a
3869 symlink pointed to a non-existing file or a file in a directory that
3870 Exim lacked permissions to read, a lookup for a key matching that
3871 symlink would fail. Now it is enough that a matching directory entry
3872 exists, symlink or not. (Bugzilla 503.)
3874 PH/03 The body_linecount and body_zerocount variables are now exported in the
3877 PH/04 Added the $dnslist_matched variable.
3879 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3880 This means they are set thereafter only if the connection becomes
3883 PH/06 Added the client_condition to authenticators so that some can be skipped
3884 by clients under certain conditions.
3886 PH/07 The error message for a badly-placed control=no_multiline_responses left
3887 "_responses" off the end of the name.
3889 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3891 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3892 (without spaces) instead of just copying the configuration text.
3894 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3896 PH/11 Added $max_received_linelength.
3898 PH/12 Added +ignore_defer and +include_defer to host lists.
3900 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3901 way in which PCRE > 7.0 is built.
3903 PH/14 Implemented queue_only_load_latch.
3905 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3906 MAIL command. The effect was to mangle the value on 64-bit systems.
3908 PH/16 Another patch from the Sieve maintainer.
3910 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3912 PH/18 If a system quota error occurred while trying to create the file for
3913 a maildir delivery, the message "Mailbox is full" was not appended to the
3914 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3915 only to a quota excession during the actual writing of the file.
3917 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3918 characters?) which causes problems in log lines. The DN values are now
3919 passed through string_printing() before being added to log lines.
3921 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3922 and InterBase are left for another time.)
3924 PH/21 Added message_body_newlines option.
3926 PH/22 Guard against possible overflow in moan_check_errorcopy().
3928 PH/23 POSIX allows open() to be a macro; guard against that.
3930 PH/24 If the recipient of an error message contained an @ in the local part
3931 (suitably quoted, of course), incorrect values were put in $domain and
3932 $local_part during the evaluation of errors_copy.
3938 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3939 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3942 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3943 issue a MAIL command.
3945 PH/02 In an ACL statement such as
3947 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3949 if a client was not listed at all, or was listed with a value other than
3950 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3951 the condition was not true (as it should be), so access was not denied.
3952 The bug was that the ! inversion was incorrectly passed on to the second
3953 item. This has been fixed.
3955 PH/03 Added additional dnslists conditions == and =& which are different from
3956 = and & when the dns lookup returns more than one IP address.
3958 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3959 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3961 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3962 FSYNC, which compiles an option called disable_fsync that allows for
3963 bypassing fsync(). The documentation is heavily laced with warnings.
3965 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3967 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3968 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3969 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3970 including adding "make clean"; (3) Added -fPIC when compiling the test
3971 dynamically loaded module, to get rid of a warning.
3973 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3974 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3975 = 0s. The bug is otherwise harmless.
3977 PH/07 There was a bug in the dovecot authenticator such that the value of
3978 $auth1 could be overwritten, and so not correctly preserved, after a
3979 successful authentication. This usually meant that the value preserved by
3980 the server_setid option was incorrect.
3982 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3984 PH/09 Installed PCRE release 7.0.
3986 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3987 run for batched SMTP input. It is now run at the start of every message
3988 in the batch. While fixing this I discovered that the process information
3989 (output by running exiwhat) was not always getting set for -bs and -bS
3990 input. This is fixed, and it now also says "batched" for BSMTP.
3992 PH/11 Added control=no_pipelining.
3994 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3995 patch, slightly modified), and move the expansion of helo_data till after
3996 the connection is made in the smtp transport (so it can use these
3999 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
4001 PH/14 Added log_selector = +pid.
4003 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
4005 PH/16 Add ${if forany and ${if forall.
4007 PH/17 Added dsn_from option to vary the From: line in DSNs.
4009 PH/18 Flush SMTP output before performing a callout, unless control =
4010 no_callout_flush is set.
4012 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
4013 was true (the default) a successful delivery failed to delete the retry
4014 item, thus causing premature timeout of the address. The bug is now
4017 PH/20 Added hosts_avoid_pipelining to the smtp transport.
4019 PH/21 Long custom messages for fakedefer and fakereject are now split up
4020 into multiline responses in the same way that messages for "deny" and
4021 other ACL rejections are.
4023 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
4024 with slight modification.
4026 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
4027 draft, changing the syntax and factoring some duplicate code".
4029 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
4030 for deliveries of the second and subsequent messages over the same SMTP
4033 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
4034 ${reduce, with only minor "tidies".
4036 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
4038 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
4039 expansion side effects.
4041 PH/27 When a message times out after an over-quota error from an Exim-imposed
4042 quota, the bounce message says "mailbox is full". This message was not
4043 being given when it was a system quota that was exceeded. It now should
4046 MH/03 Made $recipients available in local_scan(). local_scan() already has
4047 better access to the recipient list through recipients_list[], but
4048 $recipients can be useful in postmaster-provided expansion strings.
4050 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
4051 in the case of a MAIL command with additional options following the
4052 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
4053 were accidentally chopped off.
4055 PH/29 SMTP synchronization checks are implemented when a command is read -
4056 there is a check that no more input is waiting when there shouldn't be
4057 any. However, for some commands, a delay in an ACL can mean that it is
4058 some time before the response is written. In this time, more input might
4059 arrive, invalidly. So now there are extra checks after an ACL has run for
4060 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
4061 pipelining has not been advertised.
4063 PH/30 MH's patch to allow iscntrl() characters to be list separators.
4065 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
4066 returned in the SMTP response when smtp_return_error_details was false.
4067 This has been fixed.
4069 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
4070 instead of the C I/O that was originally supplied, because problems were
4071 reported on Solaris.
4073 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
4074 Exim which did not show up earlier: it was assuming that a call to
4075 SSL_CTX_set_info_callback() might give an error value. In fact, there is
4076 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
4077 was a macro that became an assignment, so it seemed to work. This has
4078 changed to a proper function call with a void return, hence the compile
4079 error. Exim's code has been fixed.
4081 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
4084 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
4086 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
4088 PH/37 If a message is not accepted after it has had an id assigned (e.g.
4089 because it turns out to be too big or there is a timeout) there is no
4090 "Completed" line in the log. When some messages of this type were
4091 selected by exigrep, they were listed as "not completed". Others were
4092 picked up by some special patterns. I have improved the selection
4093 criteria to be more general.
4095 PH/38 The host_find_failed option in the manualroute router can now be set
4096 to "ignore", to completely ignore a host whose IP address cannot be
4097 found. If all hosts are ignored, the behaviour is controlled by the new
4098 host_all_ignored option.
4100 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
4101 homing or because of multiple MX records with /mx) generated more than
4102 one IP address, and the following item turned out to be the local host,
4103 all the secondary addresses of the first item were incorrectly removed
4104 from the list, along with the local host and any following hosts (which
4105 is what is supposed to happen).
4107 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
4108 whoever called Exim into the -H file. In the case of the daemon it was
4109 behaving confusingly. When first started, it used values for whoever
4110 started the daemon, but after a SIGHUP it used the Exim user (because it
4111 calls itself on a restart). I have changed the code so that it now always
4114 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
4115 message are rejected with the same error (e.g. no authentication or bad
4116 sender address), and a DATA command is nevertheless sent (as can happen
4117 with PIPELINING or a stupid MUA), the error message that was given to the
4118 RCPT commands is included in the rejection of the DATA command. This is
4119 intended to be helpful for MUAs that show only the final error to their
4122 PH/42 Another patch from the Sieve maintainer.
4124 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
4125 Eximstats - Fixed some broken HTML links and added missing column headers
4127 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
4128 columns for Rejects, Temp Rejects, Ham, and Spam rows.
4130 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
4132 PH/43 Yet another patch from the Sieve maintainer.
4134 PH/44 I found a way to check for a TCP/IP connection going away before sending
4135 the response to the final '.' that terminates a message, but only in the
4136 case where the client has not sent further data following the '.'
4137 (unfortunately, this is allowed). However, in many cases there won't be
4138 any further data because there won't be any more messages to send. A call
4139 to select() can be used: if it shows that the input is "ready", there is
4140 either input waiting, or the socket has been closed. An attempt to read
4141 the next input character can distinguish the two cases. Previously, Exim
4142 would have sent an OK response which the client would never have see.
4143 This could lead to message repetition. This fix should cure that, at
4144 least in a lot of common cases.
4146 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4147 advertised in response to EHLO.
4153 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4154 fixed by 4.65/MH/01 (is this a record?) are fixed:
4156 (i) An empty string was always treated as zero by the numeric comparison
4157 operators. This behaviour has been restored.
4159 (ii) It is documented that the numeric comparison operators always treat
4160 their arguments as decimal numbers. This was broken in that numbers
4161 starting with 0 were being interpreted as octal.
4163 While fixing these problems I realized that there was another issue that
4164 hadn't been noticed. Values of message_size_limit (both the global option
4165 and the transport option) were treated as octal if they started with 0.
4166 The documentation was vague. These values are now always treated as
4167 decimal, and I will make that clear in the documentation.
4173 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4174 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4177 MH/01 Don't check that the operands of numeric comparison operators are
4178 integers when their expansion is in "skipping" mode (fixes bug
4179 introduced by 4.64-PH/07).
4181 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4182 child addresses, Exim now panics and dies. Previously, because the count
4183 is held in a short int, deliveries were likely to be lost. As such a
4184 large number of recipients for a single message is ridiculous
4185 (performance will be very, very poor), I have chosen to impose a limit
4186 rather than extend the field.
4192 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4193 leftover -K file (the existence of which was triggered by #402).
4194 While we were at it, introduced process PID as part of the -K
4195 filename. This should rule out race conditions when creating
4198 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4199 processing considerably. Previous code took too long for large mails,
4200 triggering a timeout which in turn triggers #401.
4202 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4203 in the DK code in transports.c. sendfile() is not really portable,
4204 hence the _LINUX specificness.
4206 TF/01 In the add_headers option to the mail command in an Exim filter,
4207 there was a bug that Exim would claim a syntax error in any
4208 header after the first one which had an odd number of characters
4211 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4212 callout verification, Exim cached a "reject" for the entire domain. This
4213 is correct for most verifications, but it is not correct for a recipient
4214 verification with use_sender or use_postmaster set, because in that case
4215 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4216 case of MAIL FROM:<> rejection from other early rejections (e.g.
4217 rejection of HELO). When verifying a recipient using a non-null MAIL
4218 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4219 Whatever the result of the callout, the value of the domain cache is
4220 left unchanged (for any other kind of callout, getting as far as trying
4221 RCPT means that the domain itself is ok).
4223 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4226 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4227 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4228 session, the daemon ignores ECONNECT errors and logs others; it now
4229 ignores EPIPE as well.
4231 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4232 (quoted-printable decoding).
4234 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4235 later the small subsequent patch to fix an introduced bug.
4237 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4239 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4241 PH/08 An error is now given if message_size_limit is specified negative.
4243 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4244 to be given (somewhat) arbitrary names.
4246 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4249 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4250 miscellaneous code fixes
4252 PH/10 Added the log_reject_target ACL modifier to specify where to log
4255 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4256 hostname. This is wrong, because it relates to the incoming message (and
4257 probably the interface on which it is arriving) and not to the outgoing
4258 callout (which could be using a different interface). This has been
4259 changed to use the value of the helo_data option from the smtp transport
4260 instead - this is what is used when a message is actually being sent. If
4261 there is no remote transport (possible with a router that sets up host
4262 addresses), $smtp_active_hostname is used.
4264 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4265 tweaks were necessary in order to get it to work (see also 21 below):
4266 (a) The code assumed that strncpy() returns a negative number on buffer
4267 overflow, which isn't the case. Replaced with Exim's string_format()
4269 (b) There were several signed/unsigned issues. I just did the minimum
4270 hacking in of casts. There is scope for a larger refactoring.
4271 (c) The code used strcasecmp() which is not a standard C function.
4272 Replaced with Exim's strcmpic() function.
4273 (d) The code set only $1; it now sets $auth1 as well.
4274 (e) A simple test gave the error "authentication client didn't specify
4275 service in request". It would seem that Dovecot has changed its
4276 interface. Fortunately there's a specification; I followed it and
4277 changed what the client sends and it appears to be working now.
4279 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4282 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4283 address A is aliased to B and C, where B exists and C does not. Without
4284 -v the output is "A verified" because verification stops after a
4285 successful redirection if more than one address is generated. However,
4286 with -v the child addresses are also verified. Exim was outputting "A
4287 failed to verify" and then showing the successful verification for C,
4288 with its parentage. It now outputs "B failed to verify", showing B's
4289 parentage before showing the successful verification of C.
4291 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4292 look up a TXT record in a specific list after matching in a combined
4295 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4296 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4297 they consult the DNS. I had assumed they would set it the way they
4298 wanted; and indeed my experiments on Linux seem to show that in some
4299 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4300 To be on the safe side, however, I have now made the interface to
4301 host_find_byname() similar to host_find_bydns(), with an argument
4302 containing the DNS resolver options. The host_find_byname() function now
4303 sets these options at its start, just as host_find_bydns() does. The smtp
4304 transport options dns_qualify_single and dns_search_parents are passed to
4305 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4306 of host_find_byname() use the default settings of RES_DEFNAMES
4307 (qualify_single) but not RES_DNSRCH (search_parents).
4309 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4310 spool_read_header() do less string testing, by means of a preliminary
4311 switch on the second character of optional "-foo" lines. (This is
4312 overdue, caused by the large number of possibilities that now exist.
4313 Originally there were few.) While I was there, I also converted the
4314 str(n)cmp tests so they don't re-test the leading "-" and the first
4315 character, in the hope this might squeeze out yet more improvement.
4317 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4318 flag allowing group syntax was set by the header_syntax check but not
4319 turned off, possible causing trouble later; (2) The flag was not being
4320 set at all for the header_verify test, causing "group"-style headers to
4321 be rejected. I have now set it in this case, and also caused header_
4322 verify to ignore an empty address taken from a group. While doing this, I
4323 came across some other cases where the code for allowing group syntax
4324 while scanning a header line wasn't quite right (mostly, not resetting
4325 the flag correctly in the right place). These bugs could have caused
4326 trouble for malformed header lines. I hope it is now all correct.
4328 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4329 with the "reply" argument non-NULL. The code, however (which originally
4330 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4331 but it didn't always do it. This confused somebody who was copying the
4332 code for some other use. I have removed all the tests.
4334 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4335 feature that was used to support insecure browsers during the U.S. crypto
4336 embargo. It requires special client support, and Exim is probably the
4337 only MTA that supported it -- and would never use it because real RSA is
4338 always available. This code has been removed, because it had the bad
4339 effect of slowing Exim down by computing (never used) parameters for the
4340 RSA_EXPORT functionality.
4342 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4343 authenticator to fail if there's a tab character in the incoming data
4344 (there should never be unless someone is messing about, as it's supposed
4345 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4346 if the connection is using TLS or if the remote IP is the same as the
4347 local IP, and the "valid-client-cert option" if a client certificate has
4350 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4351 authenticators. This can be used for authorization after authentication
4352 succeeds. (In the case of plaintext, it servers for both authentication
4355 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4356 if any retry times were supplied.
4358 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4359 connection, where there is no client IP address to check. In this
4360 situation, the verify now always succeeds.
4362 PH/25 Applied John Jetmore's -Mset patch.
4364 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4366 PH/27 In a string expansion for a processed (not raw) header when multiple
4367 headers of the same name were present, leading whitespace was being
4368 removed from all of them, but trailing whitespace was being removed only
4369 from the last one. Now trailing whitespace is removed from each header
4370 before concatenation. Completely empty headers in a concatenation (as
4371 before) are ignored.
4373 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4374 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4376 PH/29 [Removed. This was a change that I later backed out, and forgot to
4377 correct the ChangeLog entry (that I had efficiently created) before
4378 committing the later change.]
4380 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4381 address errors (4xx response to RCPT) over the same connection as other
4382 messages routed to the same hosts. Such deliveries are always "forced",
4383 so retry times are not inspected. This resulted in far too many retries
4384 for the affected addresses. The effect occurred only when there were more
4385 hosts than the hosts_max_try setting in the smtp transport when it had
4386 the 4xx errors. Those hosts that it had tried were not added to the list
4387 of hosts for which the message was waiting, so if all were tried, there
4388 was no problem. Two fixes have been applied:
4390 (i) If there are any address or message errors in an SMTP delivery, none
4391 of the hosts (tried or untried) are now added to the list of hosts
4392 for which the message is waiting, so the message should not be a
4393 candidate for sending over the same connection that was used for a
4394 successful delivery of some other message. This seems entirely
4395 reasonable: after all the message is NOT "waiting for some host".
4396 This is so "obvious" that I'm not sure why it wasn't done
4397 previously. Hope I haven't missed anything, but it can't do any
4398 harm, as the worst effect is to miss an optimization.
4400 (ii) If, despite (i), such a delivery is accidentally attempted, the
4401 routing retry time is respected, so at least it doesn't keep
4402 hammering the server.
4404 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4405 in ${readsocket because some servers need this prod.
4407 PH/32 Added some extra debug output when updating a wait-xxx database.
4409 PH/33 The hint "could be header name not terminated by colon", which has been
4410 given for certain expansion errors for a long time, was not being given
4411 for the ${if def:h_colon_omitted{... case.
4413 PH/34 The spec says: "With one important exception, whenever a domain list is
4414 being scanned, $domain contains the subject domain." There was at least
4415 one case where this was not true.
4417 PH/35 The error "getsockname() failed: connection reset by peer" was being
4418 written to the panic log as well as the main log, but it isn't really
4419 panic-worthy as it just means the connection died rather early on. I have
4420 removed the panic log writing for the ECONNRESET error when getsockname()
4423 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4424 runs only) independently of the message's sender address. This meant
4425 that, if the 4xx error was in fact related to the sender, a different
4426 message to the same recipient with a different sender could confuse
4427 things. In particular, this can happen when sending to a greylisting
4428 server, but other circumstances could also provoke similar problems.
4429 I have changed the default so that the retry time for these errors is now
4430 based a combination of the sender and recipient addresses. This change
4431 can be overridden by setting address_retry_include_sender=false in the
4434 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4435 remote server are returned as part of bounce messages. This was not
4436 happening for LMTP over a pipe (the lmtp transport), but now it is the
4437 same for both kinds of LMTP.
4439 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4440 in header lines that were in fact CNAMEs. This is no longer the case.
4442 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4443 and queue runs started by the daemon processed all messages. This has
4444 been fixed so that -R and -S can now usefully be given with -q<time>.
4446 PH/40 Import PCRE release 6.7 (fixes some bugs).
4448 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4450 PH/42 Give an error if -q is specified more than once.
4452 PH/43 Renamed the variables $interface_address and $interface_port as
4453 $received_ip_address and $received_port, to make it clear that these
4454 values apply to message reception, and not to the outgoing interface when
4455 a message is delivered. (The old names remain recognized, of course.)
4457 PH/44 There was no timeout on the connect() call when using a Unix domain
4458 socket in the ${readsocket expansion. There now is.
4460 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4461 be meaningful with "accept".
4463 SC/01 Eximstats V1.43
4464 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4466 SC/02 Eximstats V1.44
4467 Use a glob alias rather than an array ref in the generated
4468 parser. This improves both readability and performance.
4470 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4471 Collect SpamAssassin and rejection statistics.
4472 Don't display local sender or destination tables unless
4473 there is data to show.
4474 Added average volumes into the top table text output.
4476 SC/04 Eximstats V1.46
4477 Collect data on the number of addresses (recipients)
4478 as well as the number of messages.
4480 SC/05 Eximstats V1.47
4481 Added 'Message too big' to the list of mail rejection
4482 reasons (thanks to Marco Gaiarin).
4484 SC/06 Eximstats V1.48
4485 Mainlog lines which have GMT offsets and are too short to
4486 have a flag are now skipped.
4488 SC/07 Eximstats V1.49 (Alain Williams)
4489 Added the -emptyok flag.
4491 SC/08 Eximstats V1.50
4492 Fixes for obtaining the IP address from reject messages.
4494 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4495 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4496 whitespace changes from 4.64-PH/27
4498 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4501 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4502 are found, allow negative numbers in numeric criteria)
4504 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4506 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4507 to match changes made in 4.64-PH/43
4509 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4511 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4512 "domain" is actually an IP address, and force a failure. This locks out
4513 those revolvers/nameservers that support "A-for-A" lookups, in
4514 contravention of the specifications.
4516 PH/48 When a host name was looked up from an IP address, and the subsequent
4517 forward lookup of the name timed out, the host name was left in
4518 $sender_host_name, contrary to the specification.
4520 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4521 restricted to single-key lookups, Exim was not diagnosing an error if
4522 * or *@ was used with a query-style lookup.
4524 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4526 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4527 long ago, but noone interested enough thought of it. Let's just say that
4528 the "1.1" means that there are some new functions that weren't there at
4529 some point in the past.
4531 PH/51 Error processing for expansion failure of helo_data from an smtp
4532 transport during callout processing was broken.
4534 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4535 tested/used via the -bh/-bhc/-bs options.
4537 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4538 bug, fixed in subsequent PCRE releases).
4540 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4541 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4543 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4549 SC/01 Use a glob alias rather than an array ref in eximstats generated
4550 parser. This improves both readability and performance.
4552 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4553 Don't display local sender or destination tables in eximstats unless
4554 there is data to show.
4555 Added average volumes into the eximstats top table text output.
4557 SC/03 Collect data on the number of addresses (recipients) as well
4558 as the number of messages in eximstats.
4560 TF/01 Correct an error in the documentation for the redirect router. Exim
4561 does (usually) call initgroups() when daemonizing.
4563 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4564 with consistent privilege compared to when running as a daemon.
4566 TF/03 Note in the spec that $authenticated_id is not set for local
4567 submissions from trusted users.
4569 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4570 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4572 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4573 by adding some example configuration directives to the default
4574 configuration file. A little bit of work is required to uncomment the
4575 directives and define how usernames and passwords are checked, but
4576 there is now a framework to start from.
4578 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4579 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4580 without this. I don't know how relevant this is to other LDAP libraries.
4582 PH/02 Add the verb name to the "unknown ACL verb" error.
4584 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4586 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4588 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4589 directory not expanded when it should be if an expanded home directory
4590 was set for the address (which is overridden by the transport).
4592 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4595 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4596 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4597 because it is too late at that time, and has no effect.
4599 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4600 security issue with \' (bugzilla #107). I could not use the
4601 PQescapeStringConn() function, because it needs a PGconn value as one of
4604 PH/08 When testing addresses using -bt, indicate those final addresses that
4605 are duplicates that would not cause an additional delivery. At least one
4606 person was confused, thinking that -bt output corresponded to deliveries.
4607 (Suppressing duplicates isn't a good idea as you lose the information
4608 about possibly different redirections that led to the duplicates.)
4610 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4611 systems where poll() doesn't work, in particular OS X.
4613 PH/10 Added more information to debugging output for retry time not reached.
4615 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4616 operations in malware.c.
4618 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4621 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4622 syslog_duplication set false, log lines that would normally be written
4623 both the the main log and to the reject log were not written to syslog at
4626 PH/14 In the default configuration, change the use of "message" in ACL warn
4627 statements to "add_header".
4629 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4630 not followed by a command (e.g. "seen endif").
4632 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4633 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4636 PH/17 Added extra conditions to the default value of delay_warning_condition
4640 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4641 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4642 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4645 The Auto-Submitted: and various List- headers are standardised, whereas I
4646 don't think Precedence: ever was.
4648 PH/18 Refactored debugging code in route_finduser() to show more information,
4649 in particular, the error code if getpwnam() issues one.
4651 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4652 This is apparently needed in addition to the PH/07 change above to avoid
4653 any possible encoding problems.
4655 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4656 but not after initializing Perl.
4658 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4659 output them only if debugging. By default they are written stderr,
4660 apparently, which is not desirable.
4662 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4665 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4668 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4670 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4671 authenticated or an ident call has been made. Suppress the default
4672 values for $authenticated_id and $authenticated_sender (but permit -oMai
4673 and -oMas) when testing with -bh.
4675 PH/24 Re-jigged the order of the tests in the default configuration so that the
4676 tests for valid domains and recipients precede the DNS black list and CSA
4677 tests, on the grounds that those ones are more expensive.
4679 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4680 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4681 This bug exists in every version of Exim that I still have, right back to
4684 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4685 However, an attempt to turn on case-sensitivity in a regex key by
4686 including (?-i) didn't work because the subject string was already
4687 lowercased, and the effects were non-intuitive. It turns out that a
4688 one-line patch can be used to allow (?-i) to work as expected.
4694 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4695 other effects) broke the use of negated acl sub-conditions.
4697 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4700 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4701 "Deny" causes Exim to reject the incoming connection with a 554 error.
4702 Unfortunately, if there is a major crisis, such as a disk failure,
4703 tcp-wrappers gives "deny", whereas what one would like would be some
4704 kind of temporary error. A kludge has been added to help with this.
4705 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4706 554 error is used if errno is still zero or contains ENOENT (which occurs
4707 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4710 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4712 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4713 errors. Otherwise a message that provokes a temporary error (when other
4714 messages do not) can cause a whole host to time out.
4716 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4717 addresses were routed directly to files or pipes from a redirect router.
4718 File deliveries just didn't batch; pipe deliveries might have suffered
4721 PH/06 A failure to get a lock for a hints database would erroneously always say
4722 "Failed to get write lock", even when it was really a read lock.
4724 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4725 of 0600. This has been changed to use the value of the lockfile_mode
4726 option (which defaults to 0600).
4728 PH/08 Applied small patch from the Sieve maintainer.
4730 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4731 folder from quota calculations, a direct delivery into this folder messed
4732 up the contents of the maildirsize file. This was because the regex was
4733 used only to exclude .Trash (or whatever) when the size of the mailbox
4734 was calculated. There was no check that a delivery was happening into an
4735 excluded directory. This bug has been fixed by ignoring all quota
4736 processing for deliveries into excluded directories.
4738 PH/10 Added the maildirfolder_create_regex option to appendfile.
4744 PH/01 The code for finding all the local interface addresses on a FreeBSD
4745 system running IPv6 was broken. This may well have applied to all BSD
4746 systems, as well as to others that have similar system calls. The broken
4747 code found IPv4 interfaces correctly, but gave incorrect values for the
4748 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4749 that it would not match correctly against @[] and not recognize the IPv6
4752 PH/02 The ipliteral router was not recognizing addresses of the form user@
4753 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4755 PH/03 Added disable_ipv6.
4757 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4758 decoded form, because it is most often used to construct To: headers
4759 lines in autoreplies, and the decoded form may well be syntactically
4760 invalid. However, $reply_address has leading white space removed, and all
4761 newlines turned into spaces so that the autoreply transport does not
4764 PH/05 If group was specified without a user on a router, and no group or user
4765 was specified on a transport, the group from the router was ignored.
4767 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4768 for visible compile-time settings that can be used to change these
4769 numbers, for those that want even more. Backwards compatibility with old
4770 spool files has been maintained. However, going back to a previous Exim
4771 release will lost any variables that are in spool files.
4773 PH/07 Two small changes when running in the test harness: increase delay when
4774 passing a TCP/IP connection to a new process, in case the original
4775 process has to generate a bounce, and remove special handling of
4776 127.0.0.2 (sic), which is no longer necessary.
4778 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4779 be the same on different OS.
4781 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4784 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4785 whether --show-vars was specified or not
4787 JJ/02 exipick: Added support for new ACL variable spool format introduced
4790 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4791 syntactically invalid From: or Reply-to: line, and a filter used this to
4792 generate an autoreply, and therefore failed to obtain an address for the
4793 autoreply, Exim could try to deliver to a non-existent relative file
4794 name, causing unrelated and misleading errors. What now happens is that
4795 it logs this as a hard delivery error, but does not attempt to create a
4798 PH/11 The exinext utility has a -C option for testing purposes, but although
4799 the given file was scanned by exinext itself; it wasn't being passed on
4800 when Exim was called.
4802 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4803 an end-of-file indication when reading a command response.
4805 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4806 compiled. In many other places in Exim, IPv6 addresses are always
4807 recognized, so I have changed this. It also means that IPv4 domain
4808 literals of the form [IPV4:n.n.n.n] are now always recognized.
4810 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4811 used if the router is not running as root, for example, when verifying at
4812 ACL time, or when using -bh. The debugging output from this situation was
4813 non-existent - all you got was a failure to exec. I have made two
4816 (a) Failures to set uid/gid, the current directory, or a process leader
4817 in a subprocess such as that created by queryprogram now generate
4818 suitable debugging output when -d is set.
4820 (b) The queryprogram router detects when it is not running as root,
4821 outputs suitable debugging information if -d is set, and then runs
4822 the subprocess without attempting to change uid/gid.
4824 PH/15 Minor change to Makefile for building test_host (undocumented testing
4827 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4828 additional section of a DNS packet that returns MX or SRV records.
4829 Instead, it always explicitly searches for A/AAAA records. This avoids
4830 major problems that occur when a DNS server includes only records of one
4831 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4832 fixed another bug: if SRV records were looked up and the corresponding
4833 address records were *not* found in the additional section, the port
4834 values from the SRV records were lost.
4836 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4837 using the correct key (the original address) when searching the retry
4838 rules in order to find which one to use for generating the retry hint.
4840 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4841 adding the default one. Similarly, if it contains a Reply-To: header, the
4842 errors_reply_to option, if set, is not used.
4844 PH/19 When calculating a retry time, Exim used to measure the "time since
4845 failure" by looking at the "first failed" field in the retry record. Now
4846 it does not use this if it is later than than the arrival time of the
4847 message. Instead it uses the arrival time. This makes for better
4848 behaviour in cases where some deliveries succeed, thus re-setting the
4849 "first failed" field. An example is a quota failure for a huge message
4850 when small messages continue to be delivered. Without this change, the
4851 "time since failure" will always be short, possible causing more frequent
4852 delivery attempts for the huge message than are intended.
4853 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4855 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4856 $1, $2, $3) because the numerical variables can be reset during some
4857 expansion items (e.g. "match"), thereby losing the authentication data.
4859 PH/21 Make -bV show the size of off_t variables so that the test suite can
4860 decide whether to run tests for quotas > 2G.
4862 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4863 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4864 filecount value is greater than 2G or if a quota value is greater than 2G
4865 on a system where the size of off_t is not greater than 4, a panic error
4868 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4869 never match. The debug and -bh output now contains an explicit error
4870 message indicating a malformed IPv4 address or mask.
4872 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4873 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4874 PH/23 above applies.
4876 PH/25 Do not write to syslog when running in the test harness. The only
4877 occasion when this arises is a failure to open the main or panic logs
4878 (for which there is an explicit test).
4880 PH/26 Added the /no_tell option to "control=freeze".
4882 PH/27 If a host name lookup failed very early in a connection, for example, if
4883 the IP address matched host_lookup and the reverse lookup yielded a name
4884 that did not have a forward lookup, an error message of the form "no IP
4885 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4886 could be logged. Now it outputs the IP address instead of "NULL".
4888 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4889 allows the sender and the authenticated sender to be set when
4890 submitting a message from within Exim. Since child_open_exim() is
4891 documented for local_scan(), the new function should be too.
4893 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4894 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4895 results in an empty string is now treated as unset.
4897 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4899 PH/31 Added sender_verify_fail logging option.
4901 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4902 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4903 tidied the source and removed it altogether.
4905 PH/33 When a queue run was abandoned because the load average was too high, a
4906 log line was always written; now it is written only if the queue_run log
4907 selector is set. In addition, the log line for abandonment now contains
4908 information about the queue run such as the pid. This is always present
4909 in "start" and "stop" lines but was omitted from the "abandon" line.
4911 PH/34 Omit spaces between a header name and the colon in the error message that
4912 is given when verify = headers_syntax fails (if there are lots of them,
4913 the message gets confusing).
4915 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4916 names, as there are now some PTR records that contain slashes. This check
4917 is only to protect against broken name servers that fall over on strange
4918 characters, so the fact that it applies to all lookups doesn't matter.
4920 PH/36 Now that the new test suite is complete, we can remove some of the
4921 special code in Exim that was needed for the old test suite. For example,
4922 sorting DNS records because real resolvers return them in an arbitrary
4923 order. The new test suite's fake resolver always returns records in the
4926 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4927 bounces) except when queue_only is set, to avoid logging races between
4928 the different processes.
4930 PH/38 Panic-die if .include specifies a non-absolute path.
4932 PH/39 A tweak to the "H" retry rule from its user.
4934 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4935 a label. They prevented compilation on older perls.
4937 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4938 a warning to be raised on newish perls.
4940 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4941 on queue. Changes to match documented behaviour of showing count of
4942 messages matching specified criteria.
4944 PH/40 Changed the default ident timeout from 30s to 5s.
4946 PH/41 Added support for the use of login_cap features, on those BSD systems
4947 that have them, for controlling the resources used by pipe deliveries.
4949 PH/42 The content-scanning code uses fopen() to create files in which to put
4950 message data. Previously it was not paying any attention to the mode of
4951 the files. Exim runs with umask(0) because the rest of the code creates
4952 files with open(), and sets the required mode explicitly. Thus, these
4953 files were ending up world-writeable. This was not a big issue, because,
4954 being within the spool directory, they were not world-accessible. I have
4955 created a function called modefopen, which takes an additional mode
4956 argument. It sets umask(777), creates the file, chmods it to the required
4957 mode, then resets the umask. All the relevant calls to fopen() in the
4958 content scanning code have been changed to use this function.
4960 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4961 to 24 hours. This avoids potential overflow problems when processing G
4962 and H retry rules. I suspect nobody ever tinkers with this value.
4964 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4966 PH/45 When the plaintext authenticator is running as a client, the server's
4967 challenges are checked to ensure they are valid base64 strings. By
4968 default, the authentication attempt is cancelled if an invalid string is
4969 received. Setting client_ignore_invalid_base64 true ignores these errors.
4970 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4971 they are received. Thus, the responses can be made to depend on the
4972 challenges. If an invalid string is ignored, an empty string is placed in
4975 PH/46 Messages that are created by the autoreply transport now contains a
4976 References: header, in accordance with RFCs 2822 and 3834.
4978 PH/47 Added authenticated_sender_force to the smtp transport.
4980 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4982 PH/49 Installed latest patch from the Sieve maintainer.
4984 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4985 was also set, the appendfile transport was unnecessarily scanning a
4986 directory of message files (e.g. for maildir delivery) to find the count
4987 of files (along with the size), even though it did not need this
4988 information. It now does the scan only if it needs to find either the
4989 size of the count of files.
4991 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4993 PH/52 Two bugs concerned with error handling when the smtp transport is
4996 (i) Exim was not creating retry information for temporary errors given
4997 for individual recipients after the DATA command when the smtp transport
4998 was used in LMTP mode. This meant that they could be retried too
4999 frequently, and not timed out correctly.
5001 (ii) Exim was setting the flag that allows error details to be returned
5002 for LMTP errors on RCPT commands, but not for LMTP errors for individual
5003 recipients that were returned after the DATA command.
5005 PH/53 This is related to PH/52, but is more general: for any failing address,
5006 when detailed error information was permitted to be returned to the
5007 sender, but the error was temporary, then after the final timeout, only
5008 "retry timeout exceeded" was returned. Now it returns the full error as
5009 well as "retry timeout exceeded".
5011 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
5012 do this, and (what is worse) MTAs that accept it.
5014 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
5015 will now be deprecated.
5017 PH/56 New os.c-cygwin from the Cygwin maintainer.
5019 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
5020 formats (previously only available in exim formats via -bpr, -bpru,
5021 and -bpra. Now also available in native and exiqgrep formats)
5023 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
5024 with very large, slow to parse queues
5026 JJ/08 exipick: added ! as generic prefix to negate any criteria format
5028 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
5030 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
5031 responses to authentication challenges, though it was showing the
5032 challenges; (ii) I've removed the CR characters from the debug output for
5035 PH/58 Allow for the insertion of a newline as well as a space when a string
5036 is turned into more than one encoded-word during RFC 2047 encoding. The
5037 Sieve code now uses this.
5039 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
5040 data_4xx, lost_connection, tls_required.
5042 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
5043 message was being sent as an SMTP response.
5045 PH/61 Add -l and -k options to exicyclog.
5047 PH/62 When verifying, if an address was redirected to one new address, so that
5048 verification continued, and the new address failed or deferred after
5049 having set something in $address_data, the value of $address_data was not
5050 passed back to the ACL. This was different to the case when no
5051 redirection occurred. The value is now passed back in both cases.
5053 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
5054 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
5055 use login_cap.h, so on its own it isn't the distinguishing feature. The
5056 new name refers directly to the setclassresources() function.
5058 PH/65 Added configuration files for NetBSD3.
5060 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
5062 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
5063 is preferred over IPv4.
5065 PH/68 The bounce_return_message and bounce_return_body options were not being
5066 honoured for bounces generated during the reception of non-SMTP messages.
5067 In particular, this applied to messages rejected by the ACL. This bug has
5068 been fixed. However, if bounce_return_message is true and bounce_return_
5069 body is false, the headers that are returned for a non-SMTP message
5070 include only those that have been read before the error was detected.
5071 (In the case of an ACL rejection, they have all been read.)
5073 PH/69 The HTML version of the specification is now built in a directory called
5074 spec_html instead of spec.html, because the latter looks like a path with
5075 a MIME-type, and this confuses some software.
5077 PH/70 Catch two compiler warnings in sieve.c.
5079 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
5080 function verify_get_ident() calls ip_connect() to connect a socket, but
5081 if the "connect()" function timed out, ip_connect() used to close the
5082 socket. However, verify_get_ident() also closes the socket later, and in
5083 between Exim writes to the log, which may get opened at this point. When
5084 the socket was closed in ip_connect(), the log could get the same file
5085 descriptor number as the socket. This naturally causes chaos. The fix is
5086 not to close the socket in ip_connect(); the socket should be closed by
5087 the function that creates it. There was only one place in the code where
5088 this was missing, in the iplookup router, which I don't think anybody now
5089 uses, but I've fixed it anyway.
5091 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
5092 well as to direct DNS lookups. Otherwise the handling of names in host
5093 lists is inconsistent and therefore confusing.
5099 PH/01 Two changes to the default runtime configuration:
5101 (1) Move the checks for relay_from_hosts and authenticated clients from
5102 after to before the (commented out) DNS black list checks.
5104 (2) Add control=submission to the relay_from_hosts and authenticated
5105 clients checks, on the grounds that messages accepted by these
5106 statements are most likely to be submissions.
5108 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
5110 (1) Generate an error if the third argument for the ${prvs expansion is
5113 (2) Treat a missing third argument of ${prvscheck as if it were an empty
5116 (3) Reset the variables that are obtained from the first argument of
5117 ${prvscheck and used in the second argument before leaving the code,
5118 because their memory is reclaimed, so using them afterwards may do
5121 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
5122 one (it's much easier than Tom thought :-).
5124 (5) Because of (4), we can now allow for the use of $prvscheck_result
5125 inside the third argument.
5127 PH/03 For some reason, the default setting of PATH when running a command from
5128 a pipe transport was just "/usr/bin". I have changed it to
5131 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
5132 anything to be listed in the output from -bV.
5134 PH/05 When a filter generated an autoreply, the entire To: header line was
5135 quoted in the delivery log line, like this:
5137 => >A.N.Other <ano@some.domain> <original@ddress> ...
5139 This has been changed so that it extracts the operative address. There
5140 may be more than one such address. If so, they are comma-separated, like
5143 => >ano@some.domain,ona@other.domain <original@ddress> ...
5145 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5146 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5147 not being looked up in the rDNS to get a host name, Exim was showing the
5148 IP address twice in Received: lines, even though the IP addresses were
5149 identical. For example:
5151 Received: from [1.2.3.4] (helo=[1.2.3.4])
5153 However, if the real host name was known, it was omitting the HELO data
5154 if it matched the actual IP address. This has been tidied up so that it
5155 doesn't show the same IP address twice.
5157 PH/07 When both +timestamp and +memory debugging was on, the value given by
5158 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5159 called by the debug printing, thereby overwriting the timestamp buffer.
5160 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5162 PH/08 When the original message was included in an autoreply transport, it
5163 always said "this is a copy of the message, including all the headers",
5164 even if body_only or headers_only was set. It now gives an appropriate
5167 PH/09 Applied a patch from the Sieve maintainer which:
5169 o fixes some comments
5170 o adds the (disabled) notify extension core
5171 o adds some debug output for the result of if/elsif tests
5172 o points to the current vacation draft in the documentation
5173 and documents the missing references header update
5177 o fixes a bug in processing the envelope test (when testing
5178 multiple envelope elements, the last element determined the
5181 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5182 Electronic Mail") by including:
5184 Auto-submitted: auto-generated
5186 in the messages that it generates (bounce messages and others, such as
5187 warnings). In the case of bounce messages for non-SMTP messages, there was
5188 also a typo: it was using "Auto_submitted" (underscore instead of
5189 hyphen). Since every message generated by Exim is necessarily in response
5190 to another message, thes have all been changed to:
5192 Auto-Submitted: auto-replied
5194 in accordance with these statements in the RFC:
5196 The auto-replied keyword:
5198 - SHOULD be used on messages sent in direct response to another
5199 message by an automatic process,
5201 - MUST NOT be used on manually-generated messages,
5203 - MAY be used on Delivery Status Notifications (DSNs) and Message
5204 Disposition Notifications (MDNs),
5206 - MUST NOT be used on messages generated by automatic or periodic
5207 processes, except for messages which are automatic responses to
5210 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5211 to the default Received: header definition.
5213 PH/12 Added log selector acl_warn_skipped (default on).
5215 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5216 variables because (a) they are in the wrong storage pool and (b) even if
5217 they were copied, it wouldn't work properly because of the caching.
5219 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5220 checking when decoding. Apparently there are clients that generate
5221 overlong encoded strings. Why am I not surprised?
5223 PH/15 If the first argument of "${if match_address" was not empty, but did not
5224 contain an "@" character, Exim crashed. Now it writes a panic log message
5225 and treats the condition as false.
5227 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5229 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5230 extension "envelope-auth". The code is finished and in agreement with
5231 other implementations, but there is no documentation so far and in fact,
5232 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5233 not changing the active code.
5235 Print executed "if" and "elsif" statements when debugging is used. This
5236 helps a great deal to understand what a filter does.
5238 Document more things not specified clearly in RFC3028. I had all this
5239 sorted out, when out of a sudden new issues came to my mind. Oops."
5241 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5244 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5245 canonical form (as documented). However, after a host name lookup from
5246 the IP address, check_host() was doing a simple string comparison with
5247 addresses acquired from the DNS when checking that the found name did
5248 have the original IP as one of its addresses. Since any found IPv6
5249 addresses are likely to be in abbreviated form, the comparison could
5250 fail. Luckily, there already exists a function for doing the comparison
5251 by converting both addresses to binary, so now that is used instead of
5252 the text comparison.
5254 PH/20 There was another similar case to PH/19, when a complete host name was
5255 given in a host list; looking up its IP address could give an abbreviated
5256 form, whereas the current host's name might or might not be abbreviated.
5257 The same fix has been applied.
5263 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5264 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5267 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5268 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5270 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5272 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5273 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5274 Also, for "Auto-Submitted", treat anything other than "no" as
5275 non-personal, in accordance with RFC 3834. (Previously it treated
5276 anything starting "auto-" as non-personal.)
5278 TF/01 The control=submission/name=... option had a problem with syntax
5279 errors if the name included a slash character. The /name= option
5280 now slurps the rest of the string, so it can include any characters
5281 but it must come last in the list of options (after /sender_retain
5284 PH/05 Some modifications to the interface to the fake nameserver for the new
5292 TK/01 Added the "success_on_redirect" address verification option. See
5293 NewStuff for rationale and an example.
5295 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5297 PH/02 Patch to exigrep to allow it to work on syslog lines.
5299 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5300 fread() to skip over the body file's header line, because in Cygwin the
5301 header line is locked and is inaccessible.
5303 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5304 co-exist for some time) to make it clear that it is the Exim ID that is
5305 referenced, not the Message-ID: header line.
5307 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5308 string_format() function, because snprintf() does not exist on all
5311 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5312 ${stat: expansion item.
5314 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5315 protocol synchronization error", to keep the pedants happy.
5317 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5318 well as for IRIX systems, when gcc is being used. See the host.c source
5321 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5323 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5326 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5327 transport and to the smtp transport in LMTP mode.
5329 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5331 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5332 run a filter in a subprocess. This could lead to confusion in subsequent
5333 lookups in the parent process. There should also be a search_tidyup() at
5334 the end of the subprocess.
5336 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5337 only if the host matched helo_try_verify_hosts, which caused the
5338 verification to occur when the EHLO/HELO command was issued. The ACL just
5339 tested the remembered result. Now, if a previous verification attempt has
5340 not happened, "verify = helo" does it there and then.
5342 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5344 TK/03 Fix log output including CR from clamd.
5346 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5347 exist provoked a memory error which could cause a segfault.
5349 PH/15 Installed PCRE 6.2
5351 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5353 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5354 of the problem. Specifically, suggested +O2 rather than +O1 for the
5357 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5359 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5360 record, the port was not correctly logged when the outgoing_port log
5361 selector was set (it logged the transort's default port).
5363 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5364 fallback_hosts, and "hosts" in the smtp transport.
5366 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5367 host errors such as "Connection refused".
5369 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5370 authentication with radiusclient 0.4.9:
5372 - Error returned from rc_read_config was caught wrongly
5373 - Username/password not passed on to radius server due to wrong length.
5375 The presumption is that some radiusclient API changes for 4.51/PH/17
5376 were not taken care of correctly. The code is still untested by me (my
5377 Linux distribution still has 0.3.2 of radiusclient), but it was
5378 contributed by a Radius user.
5380 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5381 expanding the "port" option of the smtp transport.
5383 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5384 while reading a MIME header. Thanks to Tom Hughes for a patch.
5386 PH/24 Include config.h inside local_scan.h so that configuration settings are
5389 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5390 that in an ACL for RCPT (for example), you can examine exactly what was
5393 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5394 commands, but it was not correctly comparing the address with the actual
5395 client host address. Thus, it would show the EHLO address in Received:
5396 header lines when this was not necessary.
5398 PH/27 Added the % operator to ${eval:}.
5400 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5401 it should be ignoring failures (because with -C, for example, it has lost
5402 privilege). It wasn't ignoring creation failures other than "already
5405 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5408 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5409 because an input line was too long, either on its own, or by virtue of
5410 too many continuations, the temporary file was not being removed, and the
5411 return code was incorrect.
5413 PH/31 Missing "BOOL" in function definition in filtertest.c.
5415 PH/32 Applied Sieve patches from the maintainer.
5417 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5419 PH/33 Added "verify = not_blind".
5421 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5422 Local/Makefile (with some defaults set). These are used in built scripts
5423 such as exicyclog, but they have never been used in the exim_install
5424 script (though there are many overriding facilities there). I have
5425 arranged that the exim_install script now takes note of these two
5428 PH/35 Installed configuration files for Dragonfly.
5430 PH/36 When a locally submitted message by a trusted user did not contain a
5431 From: header, and the sender address was obtained from -f or from an SMTP
5432 MAIL command, and the trusted user did not use -F to supply a sender
5433 name, $originator_name was incorrectly used when constructing a From:
5434 header. Furthermore, $originator_name was used for submission mode
5435 messages from external hosts without From: headers in a similar way,
5436 which is clearly wrong.
5438 PH/37 Added control=suppress_local_fixups.
5440 PH/38 When log_selector = +received_sender was set, and the addition of the
5441 sender made the log line's construction buffer exactly full, or one byte
5442 less than full, an overflow happened when the terminating "\n" was
5445 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5446 when the result of a list match is failure because a DNS lookup failed.
5448 PH/40 RM_COMMAND is now used in the building process.
5450 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5451 the "build-* directories that it finds.
5453 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5454 address in a domain literal was a prefix of an interface address.
5456 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5457 when verifying a sender address, unless rewrite_headers is false.
5459 PH/44 Wrote a long comment about why errors_to addresses are verified as
5460 recipients, not senders.
5462 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5463 the ratelimit ACL was added.
5465 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5467 PH/46 Added extra information about PostgreSQL errors to the error string.
5469 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5470 avoiding the need to install special zones in a real server. This is
5471 backwards compatible; if it can't find the fake resolver, it drops back.
5472 Thus, both old and new test suites can be run.
5474 TF/02 Added util/ratelimit.pl
5476 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5477 clock is set back in time.
5479 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5480 Candler <B.Candler@pobox.com>.
5482 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5483 OK for addresses that are the result of redirections.
5485 PH/48 A number of further additions for the benefit of the new test suite,
5486 including a fake gethostbyname() that interfaces to the fake DNS resolver
5489 TF/06 The fix for widen_domains has also been applied to qualify_single and
5490 search_parents which are the other dnslookup options that can cause
5493 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5496 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5498 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5499 service" if it encountered an MX record with an empty target hostname.
5500 The message is now "an MX or SRV record indicated no SMTP service".
5502 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5503 if the DNS of the sending site is misconfigured. This is quite a
5504 common situation. This change restores the behaviour of treating a
5505 helo verification defer as a failure.
5507 PH/51 If self=fail was set on a router, the bounce message did not include the
5508 actual error message.
5514 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5516 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5517 command itself ended in error, the underlying message about the transport
5518 filter timeout was being overwritten with the pipe command error. Now the
5519 underlying error message should be appended to the second error message.
5521 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5523 PH/02 Reduce the amount of output that "make" produces by default. Full output
5524 can still be requested.
5526 PH/03 The warning log line about a condition test deferring for a "warn" verb
5527 was being output only once per connection, rather than after each
5528 occurrence (because it was using the same function as for successful
5529 "warn" verbs). This seems wrong, so I have changed it.
5531 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5532 it should not have, which might have caused a crash in the right
5533 circumstances, but probably never did.
5535 PH/04 Installed a modified version of Tony Finch's patch to make submission
5536 mode fix the return path as well as the Sender: header line, and to
5537 add a /name= option so that you can make the user's friendly name appear
5540 TF/03 Added the control = fakedefer ACL modifier.
5542 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5543 Mark Lowes for thorough testing.
5545 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5547 TK/03 Merged latest SRS patch from Miles Wilton.
5549 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5550 with the definition in sysexits.h (which is #included earlier).
5551 Fortunately, Exim does not actually use EX_OK. The code used to try to
5552 preserve the sysexits.h value, by assuming that macro definitions were
5553 scanned for macro replacements. I have been disabused of this notion,
5554 so now the code just undefines EX_OK before #including unistd.h.
5556 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5557 in the smtp transport. When a block could not be written in a single
5558 write() function, the timeout was being re-applied to each part-write.
5559 This seems wrong - if the receiver was accepting one byte at a time it
5560 would take for ever. The timeout is now adjusted when this happens. It
5561 doesn't have to be particularly precise.
5563 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5564 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5566 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5567 without a domain if the check to <postmaster@domain> fails.
5569 SC/01 Eximstats: added -xls and the ability to specify output files
5570 (patch written by Frank Heydlauf).
5572 SC/02 Eximstats: use FileHandles for outputting results.
5574 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5576 SC/04 Eximstats: fixed display of large numbers with -nvr option
5578 SC/05 Eximstats: fixed merging of reports with empty tables.
5580 SC/06 Eximstats: added the -include_original_destination flag
5582 SC/07 Eximstats: removed tabs and trailing whitespace.
5584 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5586 TK/06 MBOX spool code: Add real "From " MBOX separator line
5587 so the .eml file is really in mbox format (even though
5588 most programs do not really care). Patch from Alex Miller.
5590 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5591 The latter is generated from $received_to and is only set if the
5592 message has one envelope recipient. SA can use these headers,
5593 obviously out-of-the-box. Patch from Alex Miller.
5595 PH/08 The ${def test on a variable was returning false if the variable's
5596 value was "0", contrary to what the specification has always said!
5597 The result should be true unless the variable is empty.
5599 PH/09 The syntax error of a character other than { following "${if
5600 def:variable_name" (after optional whitespace) was not being diagnosed.
5601 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5602 accidental colon was present, for example, could give incorrect results.
5604 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5605 result is used (not including appendfile, where other changes are about
5608 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5609 This involved changing a lot of size variables from int to off_t. It
5610 should work with maildirs and everything.
5612 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5613 spamd dying while we are connected to it.
5615 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5618 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5619 function for BDB 4.3.
5621 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5623 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5624 the sources for PCRE have been re-arranged and more files are now
5627 PH/15 The code I had for printing potentially long long variables in PH/11
5628 above was not the best (it lost precision). The length of off_t variables
5629 is now inspected at build time, and an appropriate printing format (%ld
5630 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5631 to be "long long int" or "long int". This is needed for the internal
5632 formatting function string_vformat().
5634 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5635 the configuration file to be ":syslog", then the script "guesses" where
5636 the logs files are, rather than using the compiled in default. In our
5637 case the guess is not the same as the compiled default, so the script
5638 suddenly stopped working when I started to use syslog. The patch checks
5639 to see if log_file_path is "". If so, it attempts to read it from exim
5640 with no configuration file to get the compiled in version, before it
5641 falls back to the previous guessing code."
5643 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5644 implementing BATV in an Exim configuration. See NewStuff for the gory
5647 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5648 Makefile that are specific to HP-UX.
5650 PH/18 If the "use_postmaster" option was set for a recipient callout together
5651 with the "random" option, the postmaster address was used as the MAIL
5652 FROM address for the random test, but not for the subsequent recipient
5653 test. It is now used for both.
5655 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5656 patch removes a few documentation additions to RFC 3028, because the
5657 latest draft now contains them. It adds the new en;ascii-case comparator
5658 and a new error check for 8bit text in MIME parts. Comparator and
5659 require names are now matched exactly. I enabled the subaddress
5660 extension, but it is not well tested yet (read: it works for me)."
5662 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5663 rework some of the code of TK/09 above to avoid the hardwired use of
5664 "%lld" and "long long". Replaced the call to snprintf() with a call to
5667 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5668 records point to non-existent hosts", "retry timeout exceeded", and
5669 "retry time not reached for any host after a long failure period".
5671 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5672 experimental DomainKeys support:
5674 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5675 (2) On an error such as an illegally used "control", the wrong name for
5676 the control was given.
5678 These problems did NOT occur unless DomainKeys support was compiled.
5680 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5682 PH/24 Added ${if match_ip condition.
5684 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5685 databases so that it will be absolutely obvious if a crash occurs in the
5686 DB library. This is a regular occurrence (often caused by mis-matched
5689 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5690 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5691 picked up on a user's system that detects such things. There doesn't seem
5692 to be a gcc warning option for this - only an attribute that has to be
5693 put on the function's prototype. It seems that in Fedora Core 4 they have
5694 set this on a number of new functions. No doubt there will be more in due
5697 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5698 specify a transport. However, if an address that was verified by such a
5699 router was the subject of a callout, Exim crashed because it tried to
5700 read the rcpt_include_affixes from the non-existent transport. Now it
5701 just assumes that the setting of that option is false. This bug was
5702 introduced by 4.51/PH/31.
5704 PH/28 Changed -d+all to exclude +memory, because that information is very
5705 rarely of interest, but it makes the output a lot bigger. People tend to
5706 do -d+all out of habit.
5708 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5709 code in os-type was giving problems when libc.so lives in lib64, like on
5712 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5713 aren't the modern standard, and it seems that some systems' include files
5714 don't always have them. Exim was already checking for some of the newer
5715 ones like T_AAAA, and defining it itself. I've added checks for all the
5716 record types that Exim uses.
5718 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5719 not automatically generating a new one, as it is supposed to. This
5720 prevented TLS from working. If the file did exist, but contained invalid
5721 data, a new version was generated, as expected. It was only the case of a
5722 non-existent file that was broken.
5724 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5725 with a change in libdomainkeys > 0.64.
5727 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5728 from DNS. If the selector record carries the flag, it now has
5729 precedence over the domain-wide flag.
5731 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5733 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5734 the use of a port name that isn't defined in /etc/services) occurred, the
5735 message was deferred as in a normal delivery, and thus remained on the
5736 spool, instead of being failed because of the mua_wrapper setting. This
5737 is now fixed, and I tidied up some of the mua_wrapper messages at the
5740 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5741 the messages in a hash of arrays rather than using individual hashes.
5742 This is a bit cleaner and results in dramatic memory savings, albeit
5743 at a slight CPU cost.
5745 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5746 as requested by Marc Sherman.
5748 SC/10 Eximstats: added histograms for user specified patterns as requested
5751 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5753 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5754 fopen() in the content-scanning modules that did not already have it.
5760 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5761 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5763 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5765 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5767 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5768 to test Sieve filters that use "vacation".
5770 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5771 that changes the way the GnuTLS parameters are stored in the cache file.
5772 The new format can be generated externally. For backward compatibility,
5773 if the data in the cache doesn't make sense, Exim assumes it has read an
5774 old-format file, and it generates new data and writes a new file. This
5775 means that you can't go back to an older release without removing the
5778 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5779 work if there are any delivery delays because "one_time" forces the
5780 parent to be marked "delivered", so its unseen clone is never tried
5781 again. For this reason, Exim now forbids the simultaneous setting of
5784 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5785 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5786 entry if you want to know the details. The fix, however, neglected to
5787 consider the case when local delivery batching is involved. The test for
5788 "previously delivered" was not happening when checking to see if an
5789 address could be batched with a previous (undelivered) one; under
5790 certain circumstances this could lead to multiple deliveries to the same
5793 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5794 in its include files, and this causes problems building Exim.
5796 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5797 header_syntax) but Exim was just ignoring anything given after a slash.
5798 In particular, this caused confusion with an attempt to use "verify =
5799 reverse_host_lookup/defer_ok". An error is now given when options are
5800 supplied for verify items that do not have them. (Maybe reverse_host_
5801 lookup should have a defer_ok option, but that's a different point.)
5803 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5804 defined by RFC 821) to 2048, because there were problems with some AUTH
5805 commands, and RFC 1869 says the size should be increased for extended
5806 SMTP commands that take arguments.
5808 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5811 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5812 "unknown" error; now it says that the functionality isn't in the binary.
5814 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5815 an address' error message when a string expansion fails (syntax or
5816 whatever). Otherwise the password may appear in the log. Following change
5817 PH/42 below, there is no longer a chance of it appearing in a bounce
5820 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5822 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5823 of its addresses was ever tried. (Bugzilla bug #2.)
5825 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5826 the result incorrectly in the debug output. (It correctly added a newline
5827 to what was transported.)
5829 TF/01 Added $received_time.
5831 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5832 commented out examples of how to interface to a virus scanner and to
5833 SpamAssassin. Also added commented examples of av_scanner and
5834 spamd_address settings.
5836 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5837 and controls are allowed in which ACLs. There were a couple of minor
5838 errors. Some of the entries in the conditions table (which is a table of
5839 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5840 negation of where the condition IS allowed.
5842 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5844 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5845 header file does not have a version number, so I've had to invent a new
5846 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5847 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5848 radiusclient), but it was contributed by a Radius user.
5850 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5851 files or directories, for OpenSSL.
5853 PH/19 When an Exim process that is running as root has to create an Exim log
5854 file, it does so in a subprocess that runs as exim:exim so as to get the
5855 ownership right at creation (otherwise, other Exim processes might see
5856 the file with the wrong ownership). There was no test for failure of this
5857 fork() call, which would lead to the process getting stuck as it waited
5858 for a non-existent subprocess. Forks do occasionally fail when resources
5859 run out. I reviewed all the other calls to fork(); they all seem to check
5862 PH/20 When checking for unexpected SMTP input at connect time (before writing
5863 the banner), Exim was not dealing correctly with a non-positive return
5864 from the read() function. If the client had disconnected by this time,
5865 the result was a log entry for a synchronization error with an empty
5866 string after "input=" when read() returned zero. If read() returned -1
5867 (an event I could not check), uninitialized data bytes were printed.
5868 There were reports of junk text (parts of files, etc) appearing after
5871 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5873 PH/22 Added support for macro redefinition, and (re)definition in between
5874 driver and ACL definitions.
5876 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5877 forgetting to use the resulting value; it was using the unexpanded value.
5879 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5880 hadn't been configured. The fix is from Juergen Kreileder, who
5881 understands it better than I do:
5883 "Here's what I see happening with three configured cyrus_sasl
5884 authenticators configured (plain, login, cram-md5):
5886 On startup auth_cyrus_sasl_init() gets called for each of these.
5887 This means three calls to sasl_listmech() without a specified mech_list.
5888 => SASL tests which mechs of all available mechs actually work
5889 => three warnings about OTP not working
5890 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5892 With the patch, sasl_listmech() also gets called three times. But now
5893 SASL's mech_list option is set to the server_mech specified in the the
5894 authenticator. Or in other words, the answer from sasl_listmech()
5895 gets limited to just the mech you're testing for (which is different
5897 => the return list contains just 'plain' or 'login', 'cram-md5' or
5898 nothing depending on the value of ob->server_mech.
5900 I've just tested the patch: Authentication still works fine,
5901 unavailable mechs specified in the exim configuration are still
5902 caught, and the auth.log warnings about OTP are gone."
5904 PH/25 When debugging is enabled, the contents of the command line are added
5905 to the debugging output, even when log_selector=+arguments is not
5908 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5909 answer is "GNU", and only if the return is "GNU/something" is the answer
5912 PH/27 $acl_verify_message is now set immediately after the failure of a
5913 verification in an ACL, and so is available in subsequent modifiers. In
5914 particular, the message can be preserved by coding like this:
5916 warn !verify = sender
5917 set acl_m0 = $acl_verify_message
5919 Previously, $acl_verify_message was set only while expanding "message"
5920 and "log_message" when a very denied access.
5922 PH/28 Modified OS/os.c-Linux with
5924 -#ifndef OS_LOAD_AVERAGE
5925 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5927 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5928 nomenclature these days.)
5930 PH/29 Installed patch from the Sieve maintainer that adds the options
5931 sieve_useraddress and sieve_subaddress to the redirect router.
5933 PH/30 In these circumstances:
5934 . Two addresses routed to the same list of hosts;
5935 . First host does not offer TLS;
5936 . First host accepts first address;
5937 . First host gives temporary error to second address;
5938 . Second host offers TLS and a TLS session is established;
5939 . Second host accepts second address.
5940 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5941 and peerdn, if requested) that were in fact used only for the second
5944 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5945 attention to any local part prefix or suffix that was matched by the
5946 router that accepted the address. It now behaves in the same way as it
5947 does for delivery: the affixes are removed from the local part unless
5948 rcpt_include_affixes is set on the transport.
5950 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5951 timeout during the DATA phase of an incoming message.
5953 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5954 applied a patch sanctioned by the Sieve maintainer.
5956 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5957 the uid or gid is negative. A case of a negative gid caused this to be
5958 noticed. The fix allows for either to be negative.
5960 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5961 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5964 PH/36 The change PH/12 above was broken. Fixed it.
5966 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5967 the grounds that routing the same address twice would always produce the
5968 same answer. This might have been true once, but it is certainly no
5969 longer true now. Routing a child address may depend on the previous
5970 routing that produced that child. Some complicated redirection strategies
5971 went wrong when messages had multiple recipients, and made Exim's
5972 behaviour dependent on the order in which the addresses were given.
5974 I have moved the duplicate checking until after the routing is complete.
5975 Exim scans the addresses that are assigned to local and remote
5976 transports, and removes any duplicates. This means that more work will be
5977 done, as duplicates will always all be routed, but duplicates are
5978 presumably rare, so I don't expect this is of any significance.
5980 For deliveries to pipes, files, and autoreplies, the duplicate checking
5981 still happens during the routing process, since they are not going to be
5984 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5985 It corrects a timeout issue with spamd. This is Ian's comment: "The
5986 background is that sometimes spamd either never reads data from a
5987 connection it has accepted, or it never writes response data. The exiscan
5988 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5989 blindly assumes that writes won't block so it may never time out."
5991 PH/39 Allow G after quota size as well as K and M.
5993 PH/40 The value set for $authenticated_id in an authenticator may not contain
5994 binary zeroes or newlines because the value is written to log lines and
5995 to spool files. There was no check on this. Now the value is run through
5996 the string_printing() function so that such characters are converted to
5997 printable escape sequences.
5999 PH/41 $message_linecount is a new variable that contains the total number of
6000 lines in the message. Compare $body_linecount, which is the count for the
6003 PH/42 Exim no longer gives details of delivery errors for specific addresses in
6004 bounce and delay warning messages, except in certain special cases, which
6007 (a) An SMTP error message from a remote host;
6008 (b) A message specified in a :fail: redirection;
6009 (c) A message specified in a "fail" command in a system filter;
6010 (d) A message specified in a FAIL return from the queryprogram router;
6011 (e) A message specified by the cannot_route_message router option.
6013 In these cases only, Exim does include the error details in bounce and
6014 warning messages. There are also a few cases where bland messages such
6015 as "unrouteable address" or "local delivery error" are given.
6017 PH/43 $value is now also set for the "else" part of a ${run expansion.
6019 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
6020 being worked on, but at least Exim now implements the latest version to
6023 PH/45 In a pipe transport, although a timeout while waiting for the pipe
6024 process to complete was treated as a delivery failure, a timeout while
6025 writing the message to the pipe was logged, but erroneously treated as a
6026 successful delivery. Such timeouts include transport filter timeouts. For
6027 consistency with the overall process timeout, these timeouts are now
6028 treated as errors, giving rise to delivery failures by default. However,
6029 there is now a new Boolean option for the pipe transport called
6030 timeout_defer, which, if set TRUE, converts the failures into defers for
6031 both kinds of timeout. A transport filter timeout is now identified in
6034 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
6035 systems where "make" and "gmake" are different, calling "gmake" at top
6036 level broke things. I've arranged for the value of $(MAKE) to be passed
6037 from the Makefile to this script so that it can call the same version of
6041 A note about Exim versions 4.44 and 4.50
6042 ----------------------------------------
6044 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
6045 changes of various kinds. As a consequence, a big documentation update was
6046 needed. This delayed the release for rather longer than seemed good, especially
6047 in the light of a couple of (minor) security issues. Therefore, the changes
6048 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
6049 release. So 4.44 and 4.50 are in effect two different branches that both start
6052 I have left the 4.50 change log unchanged; it contains all the changes since
6053 4.43. The change log for 4.44 is below; many of its items are identical to
6054 those for 4.50. This seems to be the most sensible way to preserve the
6055 historical information.
6061 1. Minor wording change to the doc/README.SIEVE file.
6063 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
6064 computation of the current number of files was incorrect.
6066 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6067 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6070 4. Give more explanation in the error message when the command for a transport
6071 filter fails to execute.
6073 5. There are several places where Exim runs a non-Exim command in a
6074 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6075 was being done only for the command run by the queryprogram router. It is
6076 now done for all such subprocesses. The other cases are: ${run, transport
6077 filters, and the commands run by the lmtp and pipe transports.
6079 6. Added CONFIGURE_GROUP build-time option.
6081 7. Some older OS have a limit of 256 on the maximum number of file
6082 descriptors. Exim was using setrlimit() to set 1000 as a large value
6083 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6084 systems. I've change it so that if it can't get 1000, it tries for 256.
6086 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6087 was an oversight, and furthermore, ever since the addition of extra
6088 controls (e.g. 4.43/32), the checks on when to allow different forms of
6089 "control" were broken. There should now be diagnostics for all cases when a
6090 control that does not make sense is encountered.
6092 9. Added the /retain_sender option to "control=submission".
6094 10. $recipients is now available in the predata ACL (oversight).
6096 11. Tidy the search cache before the fork to do a delivery from a message
6097 received from the command line. Otherwise the child will trigger a lookup
6098 failure and thereby defer the delivery if it tries to use (for example) a
6099 cached ldap connection that the parent has called unbind on.
6101 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6102 of $address_data from the recipient verification was clobbered by the
6103 sender verification.
6105 13. The value of address_data from a sender verification is now available in
6106 $sender_address_data in subsequent conditions in the ACL statement.
6108 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
6110 15. Added a new option "connect=<time>" to callout options, to set a different
6113 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6114 was its contents. (It was OK if the option was not defined at all.)
6116 17. A "Completed" log line is now written for messages that are removed from
6117 the spool by the -Mrm option.
6119 18. New variables $sender_verify_failure and $recipient_verify_failure contain
6120 information about exactly what failed.
6122 19. Added -dd to debug only the daemon process.
6124 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
6125 handles timeouts, both on the server side and network timeouts. Renamed the
6126 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
6128 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
6129 It is now set to "smtps".
6131 22. $host_address is now set to the target address during the checking of
6132 ignore_target_hosts.
6134 23. When checking ignore_target_hosts for an ipliteral router, no host name was
6135 being passed; this would have caused $sender_host_name to have been used if
6136 matching the list had actually called for a host name (not very likely,
6137 since this list is usually IP addresses). A host name is now passed as
6140 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6141 code that specifies a non-restarting handler (typically sigaction() in
6142 modern systems) in an attempt to fix a rare and obscure crash bug.
6144 25. Narrowed the window for a race in the daemon that could cause it to ignore
6145 SIGCHLD signals. This is not a major problem, because they are used only to
6146 wake it up if nothing else does.
6148 26. A malformed maildirsize file could cause Exim to calculate negative values
6149 for the mailbox size or file count. Odd effects could occur as a result.
6150 The maildirsize information is now recalculated if the size or filecount
6153 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6154 support for a long time. Removed HAVE_SYS_VFS_H.
6156 28. Installed the latest version of exipick from John Jetmore.
6158 29. In an address list, if the pattern was not a regular expression, an empty
6159 subject address (from a bounce message) matched only if the pattern was an
6160 empty string. Non-empty patterns were not even tested. This was the wrong
6161 because it is perfectly reasonable to use an empty address as part of a
6162 database query. An empty address is now tested by patterns that are
6163 lookups. However, all the other forms of pattern expect the subject to
6164 contain a local part and a domain, and therefore, for them, an empty
6165 address still always fails if the pattern is not itself empty.
6167 30. Exim went into a mad DNS loop when attempting to do a callout where the
6168 host was specified on an smtp transport, and looking it up yielded more
6169 than one IP address.
6171 31. Re-factored the code for checking spool and log partition space into a
6172 function that finds that data and another that does the check. The former
6173 is then used to implement four new variables: $spool_space, $log_space,
6174 $spool_inodes, and $log_inodes.
6176 32. The RFC2047 encoding function was originally intended for short strings
6177 such as real names; it was not keeping to the 75-character limit for
6178 encoded words that the RFC imposes. It now respects the limit, and
6179 generates multiple encoded words if necessary. To be on the safe side, I
6180 have increased the buffer size for the ${rfc2047: expansion operator from
6183 33. It is now permitted to omit both strings after an "if" condition; if the
6184 condition is true, the result is "true". As before, when the second string
6185 is omitted, a false condition yields an empty string. This makes it less
6186 cumbersome to write custom ACL and router conditions.
6188 34. Failure to deliver a bounce message always caused it to be frozen, even if
6189 there was an errors_to setting on the router. The errors_to setting is now
6192 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6193 canonical form (fully expanded) before being placed in
6194 $sender_host_address.
6196 36. The table in the code that translates DNS record types into text (T_A to
6197 "A" for instance) was missing entries for NS and CNAME. It is just possible
6198 that this could have caused confusion if both these types were looked up
6199 for the same domain, because the text type is used as part of Exim's
6200 per-process caching. But the chance of anyone hitting this buglet seems
6203 37. The dnsdb lookup has been extended in a number of ways.
6205 (1) There is a new type, "zns", which walks up the domain tree until it
6206 finds some nameserver records. It should be used with care.
6208 (2) There is a new type, "mxh", which is like "mx" except that it returns
6209 just the host names, not the priorities.
6211 (3) It is now possible to give a list of domains (or IP addresses) to be
6212 looked up. The behaviour when one of the lookups defers can be
6213 controlled by a keyword.
6215 (4) It is now possible to specify the separator character for use when
6216 multiple records are returned.
6218 38. The dnslists ACL condition has been extended: it is now possible to supply
6219 a list of IP addresses and/or domains to be looked up in a particular DNS
6222 39. Added log_selector=+queue_time_overall.
6224 40. When running the queue in the test harness, wait just a tad after forking a
6225 delivery process, to get repeatability of debugging output.
6227 41. Include certificate and key file names in error message when GnuTLS fails
6228 to set them up, because the GnuTLS error message doesn't include the name
6229 of the failing file when there is a problem reading it.
6231 42. Allow both -bf and -bF in the same test run.
6233 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6235 44. The "Exiscan patch" is now merged into the mainline Exim source.
6237 45. Sometimes the final signoff response after QUIT could fail to get
6238 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6239 < 0 before doing a fflush(). This bug looks as though it goes back to the
6240 introduction of TLS in release 3.20, but "sometimes" must have been rare
6241 because the tests only now provoked it.
6243 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6244 (this can affect the format of dates).
6246 47. exim_tidydb, when checking for the continued existence of a message for
6247 which it has found a message-specific retry record, was not finding
6248 messages that were in split spool directories. Consequently, it was
6249 deleting retry records that should have stayed in existence.
6251 48. Steve fixed some bugs in eximstats.
6253 49. The SPA authentication driver was not abandoning authentication and moving
6254 on to the next authenticator when an expansion was forced to fail,
6255 contradicting the general specification for all authenticators. Instead it
6256 was generating a temporary error. It now behaves as specified.
6258 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6259 (the order specifies the preference for clients). The order is now AES256,
6260 AES128, 3DES, ARCFOUR128.
6262 51. Small patch to Sieve code - explicitly set From: when generating an
6265 52. Exim crashed if a remote delivery caused a very long error message to be
6266 recorded - for instance if somebody sent an entire SpamAssassin report back
6267 as a large number of 550 error lines. This bug was coincidentally fixed by
6268 increasing the size of one of Exim's internal buffers (big_buffer) that
6269 happened as part of the Exiscan merge. However, to be on the safe side, I
6270 have made the code more robust (and fixed the comments that describe what
6273 53. Now that there can be additional text after "Completed" in log lines (if
6274 the queue_time_overall log selector is set), a one-byte patch to exigrep
6275 was needed to allow it to recognize "Completed" as not the last thing in
6278 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6279 patch that reportedly fixes this has been added. I am not expert enough to
6280 create a test for it. This is what the patch creator wrote:
6282 "I found a little strange behaviour of ldap code when working with
6283 Windows 2003 AD Domain, where users was placed in more than one
6284 Organization Units. When I tried to give exim partial DN, the exit code
6285 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6286 But simultaneously result of request was absolutely normal ldap result,
6287 so I produce this patch..."
6289 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6290 REFERENCE, so I have modified the code to exclude the patch when that macro
6293 55. Some experimental protocols are using DNS PTR records for new purposes. The
6294 keys for these records are domain names, not reversed IP addresses. The
6295 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6296 leaves it alone. Component reversal etc. now happens only for IP addresses.
6299 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6301 57. Double the size of the debug message buffer (to 2048) so that more of very
6302 long debug lines gets shown.
6304 58. The exicyclog utility now does better if the number of log files to keep
6305 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6307 59. Two changes related to the smtp_active_hostname option:
6309 (1) $smtp_active_hostname is now available as a variable.
6310 (2) The default for smtp_banner uses $smtp_active_hostname instead
6311 of $primary_hostname.
6313 60. The host_aton() function is supposed to be passed a string that is known
6314 to be a valid IP address. However, in the case of IPv6 addresses, it was
6315 not checking this. This is a hostage to fortune. Exim now panics and dies
6316 if the condition is not met. A case was found where this could be provoked
6317 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6318 components; fortuitously, this particular loophole had already been fixed
6319 by change 4.50/55 above.
6321 If there are any other similar loopholes, the new check in host_aton()
6322 itself should stop them being exploited. The report I received stated that
6323 data on the command line could provoke the exploit when Exim was running as
6324 exim, but did not say which command line option was involved. All I could
6325 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6326 running as the user.
6329 61. There was a buffer overflow vulnerability in the SPA authentication code
6330 (which came originally from the Samba project). I have added a test to the
6331 spa_base64_to_bits() function which I hope fixes it.
6334 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6335 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6337 63. The daemon start-up calls getloadavg() while still root for those OS that
6338 need the first call to be done as root, but it missed one case: when
6339 deliver_queue_load_max is set with deliver_drop_privilege. This is
6340 necessary for the benefit of the queue runner, because there is no re-exec
6341 when deliver_drop_privilege is set.
6343 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6344 This has been fixed.
6346 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6347 was in use, was not putting the data itself into the right store pool;
6348 consequently, it could be overwritten for a subsequent message in the same
6349 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6352 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6354 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6355 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6356 the function were treating the return as a boolean value, which happened to
6357 work because 0=false and not-0=true, but is not correct code.
6359 68. The host_aton() function was not handling scoped IPv6 addresses (those
6360 with, for example, "%eth0" on the end) correctly.
6362 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6363 negated items (that is, ~something) in unsigned ints. Some compilers
6364 apparently mutter when there is no cast.
6366 70. If an address verification called from an ACL failed, and did not produce a
6367 user-specific message (i.e. there was only a "system" message), nothing was
6368 put in $acl_verify_message. In this situation, it now puts the system
6371 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6372 session; change 4.31/43 added the unwanted input to the log line - except
6373 that it did not do this in the start of session case. It now does.
6375 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6376 This is wrong and can cause the other end to generate a synchronization
6377 error if it is another Exim or anything else that does the synchronization
6378 check. A QUIT command is no longer sent after a timeout.
6380 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6381 during host lookups.
6383 74. The defer_ok option of callout verification was not working if it was used
6384 when verifying addresses in header lines, that is, for this case:
6386 verify = header_sender/callout=defer_ok
6388 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6389 those file descriptors could be used for SMTP connections. If anything
6390 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6391 could be sent to the SMTP client, causing chaos. The daemon now opens
6392 stdin, stdout, and stderr to /dev/null when it puts itself into the
6395 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6396 log by default. The user can override this with suitable Perl magic.
6398 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6399 the log message when discard triggers, was not working for the DATA ACL or
6400 for the non-SMTP ACL.
6402 78. Error message wording change in sieve.c.
6404 79. If smtp_accept_max_per_host was set, the number of connections could be
6405 restricted to fewer than expected, because the daemon was trying to set up
6406 a new connection before checking whether the processes handling previous
6407 connections had finished. The check for completed processes is now done
6408 earlier. On busy systems, this bug wouldn't be noticed because something
6409 else would have woken the daemon, and it would have reaped the completed
6412 80. If a message was submitted locally by a user whose login name contained one
6413 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6414 It caused a spool format error. I have fixed the spool reading code. A
6415 related problem was that the "from" clause in the Received: line became
6416 illegal because of the space(s). It is now covered by ${quote_local_part.
6418 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6421 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6423 83. Patch from Sieve maintainer to fix unterminated string problem in
6424 "vacation" handling.
6426 84. Some minor changes to the Linux configuration files to help with other
6427 OS variants using glibc.
6429 85. One more patch for Sieve to update vacation handling to latest spec.
6432 ----------------------------------------------------
6433 See the note above about the 4.44 and 4.50 releases.
6434 ----------------------------------------------------
6440 1. Change 4.43/35 introduced a bug that caused file counts to be
6441 incorrectly computed when quota_filecount was set in an appendfile
6444 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6445 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6448 3. Give more explanation in the error message when the command for a transport
6449 filter fails to execute.
6451 4. There are several places where Exim runs a non-Exim command in a
6452 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6453 was being done only for the command run by the queryprogram router. It is
6454 now done for all such subprocesses. The other cases are: ${run, transport
6455 filters, and the commands run by the lmtp and pipe transports.
6457 5. Some older OS have a limit of 256 on the maximum number of file
6458 descriptors. Exim was using setrlimit() to set 1000 as a large value
6459 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6460 systems. I've change it so that if it can't get 1000, it tries for 256.
6462 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6463 was an oversight, and furthermore, ever since the addition of extra
6464 controls (e.g. 4.43/32), the checks on when to allow different forms of
6465 "control" were broken. There should now be diagnostics for all cases when a
6466 control that does not make sense is encountered.
6468 7. $recipients is now available in the predata ACL (oversight).
6470 8. Tidy the search cache before the fork to do a delivery from a message
6471 received from the command line. Otherwise the child will trigger a lookup
6472 failure and thereby defer the delivery if it tries to use (for example) a
6473 cached ldap connection that the parent has called unbind on.
6475 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6476 of $address_data from the recipient verification was clobbered by the
6477 sender verification.
6479 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6480 was its contents. (It was OK if the option was not defined at all.)
6482 11. A "Completed" log line is now written for messages that are removed from
6483 the spool by the -Mrm option.
6485 12. $host_address is now set to the target address during the checking of
6486 ignore_target_hosts.
6488 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6489 being passed; this would have caused $sender_host_name to have been used if
6490 matching the list had actually called for a host name (not very likely,
6491 since this list is usually IP addresses). A host name is now passed as
6494 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6495 code that specifies a non-restarting handler (typically sigaction() in
6496 modern systems) in an attempt to fix a rare and obscure crash bug.
6498 15. Narrowed the window for a race in the daemon that could cause it to ignore
6499 SIGCHLD signals. This is not a major problem, because they are used only to
6500 wake it up if nothing else does.
6502 16. A malformed maildirsize file could cause Exim to calculate negative values
6503 for the mailbox size or file count. Odd effects could occur as a result.
6504 The maildirsize information is now recalculated if the size or filecount
6507 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6508 support for a long time. Removed HAVE_SYS_VFS_H.
6510 18. Updated exipick to current release from John Jetmore.
6512 19. Allow an empty sender to be matched against a lookup in an address list.
6513 Previously the only cases considered were a regular expression, or an
6516 20. Exim went into a mad DNS lookup loop when doing a callout where the
6517 host was specified on the transport, if the DNS lookup yielded more than
6520 21. The RFC2047 encoding function was originally intended for short strings
6521 such as real names; it was not keeping to the 75-character limit for
6522 encoded words that the RFC imposes. It now respects the limit, and
6523 generates multiple encoded words if necessary. To be on the safe side, I
6524 have increased the buffer size for the ${rfc2047: expansion operator from
6527 22. Failure to deliver a bounce message always caused it to be frozen, even if
6528 there was an errors_to setting on the router. The errors_to setting is now
6531 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6532 canonical form (fully expanded) before being placed in
6533 $sender_host_address.
6535 24. Updated eximstats to version 1.33
6537 25. Include certificate and key file names in error message when GnuTLS fails
6538 to set them up, because the GnuTLS error message doesn't include the name
6539 of the failing file when there is a problem reading it.
6541 26. Expand error message when OpenSSL has problems setting up cert/key files.
6544 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6545 (this can affect the format of dates).
6547 28. exim_tidydb, when checking for the continued existence of a message for
6548 which it has found a message-specific retry record, was not finding
6549 messages that were in split spool directories. Consequently, it was
6550 deleting retry records that should have stayed in existence.
6552 29. eximstats updated to version 1.35
6553 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6554 1.35 - bugfix such that pie charts by volume are generated correctly
6556 30. The SPA authentication driver was not abandoning authentication and moving
6557 on to the next authenticator when an expansion was forced to fail,
6558 contradicting the general specification for all authenticators. Instead it
6559 was generating a temporary error. It now behaves as specified.
6561 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6562 (the order specifies the preference for clients). The order is now AES256,
6563 AES128, 3DES, ARCFOUR128.
6565 31. Small patch to Sieve code - explicitly set From: when generating an
6568 32. Exim crashed if a remote delivery caused a very long error message to be
6569 recorded - for instance if somebody sent an entire SpamAssassin report back
6570 as a large number of 550 error lines. This bug was coincidentally fixed by
6571 increasing the size of one of Exim's internal buffers (big_buffer) that
6572 happened as part of the Exiscan merge. However, to be on the safe side, I
6573 have made the code more robust (and fixed the comments that describe what
6576 33. Some experimental protocols are using DNS PTR records for new purposes. The
6577 keys for these records are domain names, not reversed IP addresses. The
6578 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6579 leaves it alone. Component reversal etc. now happens only for IP addresses.
6582 34. The host_aton() function is supposed to be passed a string that is known
6583 to be a valid IP address. However, in the case of IPv6 addresses, it was
6584 not checking this. This is a hostage to fortune. Exim now panics and dies
6585 if the condition is not met. A case was found where this could be provoked
6586 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6587 components; fortuitously, this particular loophole had already been fixed
6588 by change 4.50/55 or 4.44/33 above.
6590 If there are any other similar loopholes, the new check in host_aton()
6591 itself should stop them being exploited. The report I received stated that
6592 data on the command line could provoke the exploit when Exim was running as
6593 exim, but did not say which command line option was involved. All I could
6594 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6595 running as the user.
6598 35. There was a buffer overflow vulnerability in the SPA authentication code
6599 (which came originally from the Samba project). I have added a test to the
6600 spa_base64_to_bits() function which I hope fixes it.
6603 36. The daemon start-up calls getloadavg() while still root for those OS that
6604 need the first call to be done as root, but it missed one case: when
6605 deliver_queue_load_max is set with deliver_drop_privilege. This is
6606 necessary for the benefit of the queue runner, because there is no re-exec
6607 when deliver_drop_privilege is set.
6609 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6610 was in use, was not putting the data itself into the right store pool;
6611 consequently, it could be overwritten for a subsequent message in the same
6612 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6615 38. Sometimes the final signoff response after QUIT could fail to get
6616 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6617 < 0 before doing a fflush(). This bug looks as though it goes back to the
6618 introduction of TLS in release 3.20, but "sometimes" must have been rare
6619 because the tests only now provoked it.
6625 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6626 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6627 Now it returns an integer. A number of calls were still expecting a T/F
6628 return. Fortuitously, in all cases, the tests worked in OK situations,
6629 which is the norm. However, things would have gone wrong on any write
6630 failures on the smtp file descriptor. This function is used when sending
6631 messages over SMTP and also when doing verify callouts.
6633 2. When Exim is called to do synchronous delivery of a locally submitted
6634 message (the -odf or -odi options), it no longer closes stderr before doing
6637 3. Implemented the mua_wrapper option.
6639 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6641 5. Implemented the functions header_remove(), header_testname(),
6642 header_add_at_position(), and receive_remove_recipient(), and exported them
6645 6. If an ACL "warn" statement specified the addition of headers, Exim already
6646 inserted X-ACL-Warn: at the start if there was no header name. However, it
6647 was not making this test for the second and subsequent header lines if
6648 there were newlines in the string. This meant that an invalid header could
6649 be inserted if Exim was badly configured.
6651 7. Allow an ACL "warn" statement to add header lines at the start or after all
6652 the Received: headers, as well as at the end.
6654 8. Added the rcpt_4xx retry error code.
6656 9. Added postmaster_mailfrom=xxx to callout verification option.
6658 10. Added mailfrom=xxxx to the callout verification option, for verify=
6661 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6662 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6664 12. Inserted some casts to stop certain compilers warning when using pointer
6665 differences as field lengths or precisions in printf-type calls (mostly
6666 affecting debugging statements).
6668 13. Added optional readline() support for -be (dynamically loaded).
6670 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6671 same clock tick as a message's arrival, so that its received time was the
6672 same as the "first fail" time on the retry record, and that message
6673 remained on the queue past the ultimate address timeout, every queue runner
6674 would try a delivery (because it was past the ultimate address timeout) but
6675 after another failure, the ultimate address timeout, which should have then
6676 bounced the address, did not kick in. This was a "< instead of <=" error;
6677 in most cases the first failure would have been in the next clock tick
6678 after the received time, and all would be well.
6680 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6681 being recognized when the domain list was tested by the match_domain
6682 condition in an expansion string.
6684 16. Added the ${str2b64: operator.
6686 17. Exim was always calling setrlimit() to set a large limit for the number of
6687 processes, without checking whether the existing limit was already
6688 adequate. (It did check for the limit on file descriptors.) Furthermore,
6689 errors from getrlimit() and setrlimit() were being ignored. Now they are
6690 logged to the main and panic logs, but Exim does carry on, to try to do its
6691 job under whatever limits there are.
6693 18. Imported PCRE 5.0.
6695 19. Trivial typo in log message " temporarily refused connection" (the leading
6698 20. If the log selector return_path_on_delivery was set and an address was
6699 redirected to /dev/null, the delivery process crashed because it assumed
6700 that a return path would always be set for a "successful" delivery. In this
6701 case, the whole delivery is bypassed as an optimization, and therefore no
6704 21. Internal re-arrangement: the function for sending a challenge and reading
6705 a response while authentication was assuming a zero-terminated challenge
6706 string. It's now changed to take a pointer and a length, to allow for
6707 binary data in such strings.
6709 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6711 23. Exim was not respecting finduser_retries when seeking the login of the
6712 uid under which it was called; it was always trying 10 times. (The default
6713 setting of finduser_retries is zero.) Also, it was sleeping after the final
6714 failure, which is pointless.
6716 24. Implemented tls_on_connect_ports.
6718 25. Implemented acl_smtp_predata.
6720 26. If the domain in control=submission is set empty, Exim assumes that the
6721 authenticated id is a complete email address when it generates From: or
6722 Sender: header lines.
6724 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6725 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6726 chown and chgrp in /bin and hostname in /usr/bin.
6728 28. Exim was keeping the "process log" file open after each use, just as it
6729 does for the main log. This opens the possibility of it remaining open for
6730 long periods when the USR1 signal hits a daemon. Occasional processlog
6731 errors were reported, that could have been caused by this. Anyway, it seems
6732 much more sensible not to leave this file open at all, so that is what now
6735 29. The long-running daemon process does not normally write to the log once it
6736 has entered its main loop, and it closes the log before doing so. This is
6737 so that log files can straightforwardly be renamed and moved. However,
6738 there are a couple of unusual error situations where the daemon does write
6739 log entries, and I had neglected to close the log afterwards.
6741 30. The text of an SMTP error response that was received during a remote
6742 delivery was being truncated at 512 bytes. This is too short for some of
6743 the long messages that one sometimes sees. I've increased the limit to
6746 31. It is now possible to make retry rules that apply only when a message has a
6747 specific sender, in particular, an empty sender.
6749 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6750 it possible to be selective about when SMTP synchronization is enforced.
6752 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6754 32. Implemented hosts_connection_nolog.
6756 33. Added an ACL for QUIT.
6758 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6761 35. Added mailbox_size and mailbox_filecount to appendfile.
6763 36. Added control = no_multiline_responses to ACLs.
6765 37. There was a bug in the logic of the code that waits for the clock to tick
6766 in the case where the clock went backwards by a substantial amount such
6767 that the microsecond fraction of "now" was more than the microsecond
6768 fraction of "then" (but the whole seconds number was less).
6770 38. Added support for the libradius Radius client library this is found on
6771 FreeBSD (previously only the radiusclient library was supported).
6777 1. When certain lookups returned multiple values in the form name=value, the
6778 quoting of the values was not always being done properly. Specifically:
6779 (a) If the value started with a double quote, but contained no whitespace,
6781 (b) If the value contained whitespace other than a space character (i.e.
6782 tabs or newlines or carriage returns) it was not quoted.
6783 This fix has been applied to the mysql and pgsql lookups by writing a
6784 separate quoting function and calling it from the lookup code. The fix
6785 should probably also be applied to nisplus, ibase and oracle lookups, but
6786 since I cannot test any of those, I have not disturbed their existing code.
6788 2. A hit in the callout cache for a specific address caused a log line with no
6789 reason for rejecting RCPT. Now it says "Previous (cached) callout
6790 verification failure".
6792 3. There was an off-by-one bug in the queryprogram router. An over-long
6793 return line was truncated at 256 instead of 255 characters, thereby
6794 overflowing its buffer with the terminating zero. As well as fixing this, I
6795 have increased the buffer size to 1024 (and made a note to document this).
6797 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6798 when Exim is waiting for an SMTP response from a remote server, Exim
6799 restarts its select() call on the socket, thereby resetting its timeout.
6800 This is not a problem when such interrupts are rare. Somebody set up a cron
6801 job to run exiwhat every 2 minutes, which is less than the normal select()
6802 timeout (5 or 10 minutes). This meant that the select() timeout never
6803 kicked in because it was always reset. I have fixed this by comparing the
6804 time when an interrupt arrives with the time at the start of the first call
6805 to select(). If more time than the timeout has elapsed, the interrupt is
6806 treated as a timeout.
6808 5. Some internal re-factoring in preparation for the addition of Sieve
6809 extensions (by MH). In particular, the "personal" test is moved to a
6810 separate function, and given an option for scanning Cc: and Bcc: (which is
6811 not set for Exim filters).
6813 6. When Exim created an email address using the login of the caller as the
6814 local part (e.g. when creating a From: or Sender: header line), it was not
6815 quoting the local part when it contained special characters such as @.
6817 7. Installed new OpenBSD configuration files.
6819 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6820 try to make them clearer.
6822 9. Callout options, other than the timeout value, were being ignored when
6823 verifying sender addresses in header lines. For example, when using
6825 verify = header_sender/callout=no_cache
6827 the cache was (incorrectly) being used.
6829 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6830 only the Cygwin environment.
6832 11. When return_path_on_delivery was set as a log selector, if different remote
6833 addresses in the same message used different return paths and parallel
6834 remote delivery occurred, the wrong values would sometimes be logged.
6835 (Whenever a remote delivery process finished, the return path value from
6836 the most recently started remote delivery process was logged.)
6838 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6839 lines when AUTH and/or TLS are in use. This is the "received protocol"
6840 field. Exim used to use "asmtp" for authenticated SMTP, without any
6841 indication (in the protocol name) for TLS use. Now it follows the RFC and
6842 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6843 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6844 names appear in log lines as well as in Received: header lines.
6846 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6847 extensions, and comparison tests, and to fix some bugs.
6849 14. Changes to the "personal" filter test:
6851 (1) The test was buggy in that it was just doing the equivalent of
6852 "contains" tests on header lines. For example, if a user's address was
6853 anne@some.where, the "personal" test would incorrectly be true for
6855 To: susanne@some.where
6857 This test is now done by extracting each address from the header in turn,
6858 and checking the entire address. Other tests that are part of "personal"
6859 are now done using regular expressions (for example, to check local parts
6860 of addresses in From: header lines).
6862 (2) The list of non-personal local parts in From: addresses has been
6863 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6864 taken from the Sieve specification recommendations.
6866 (3) If the message contains any header line starting with "List-" it is
6867 treated as non-personal.
6869 (4) The test for "circular" in the Subject: header line has been removed
6870 because it now seems ill-conceived.
6872 15. Minor typos in src/EDITME comments corrected.
6874 16. Installed latest exipick from John Jetmore.
6876 17. If headers_add on a router specified a text string that was too long for
6877 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6878 of string_sprintf() is now avoided.
6880 18. $message_body_size was not set (it was always zero) when running the DATA
6881 ACL and the local_scan() function.
6883 19. For the "mail" command in an Exim filter, no default was being set for
6884 the once_repeat time, causing a random time value to be used if "once" was
6885 specified. (If the value happened to be <= 0, no repeat happened.) The
6886 default is now 0s, meaning "never repeat". The "vacation" command was OK
6887 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6888 (I found it when inspecting the code).
6890 20. There is now an overall timeout for performing a callout verification. It
6891 defaults to 4 times the callout timeout, which applies to individual SMTP
6892 commands during the callout. The overall timeout applies when there is more
6893 than one host that can be tried. The timeout is checked before trying the
6894 next host. This prevents very long delays if there are a large number of
6895 hosts and all are timing out (e.g. when the network connections are timing
6896 out). The value of the overall timeout can be changed by specifying an
6897 additional sub-option for "callout", called "maxwait". For example:
6899 verify = sender/callout=5s,maxwait=20s
6901 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6902 to the end before writing, but this should make it even safer).
6904 22. Exim was forgetting that it had advertised PIPELINING for the second and
6905 subsequent messages on an SMTP connection. It was also not resetting its
6906 memory on STARTTLS and an internal HELO.
6908 23. When Exim logs an SMTP synchronization error within a session, it now
6909 records whether PIPELINING has been advertised or not.
6911 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6912 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6913 rather than long int.
6915 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6917 26. Added the never_mail option to autoreply.
6923 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6924 crash if the getsockname() call failed; this can happen if a connection is
6925 closed very soon after it is established. The problem was simply in the
6926 order in which certain operations were done, causing Exim to try to write
6927 to the SMTP stream before it had set up the file descriptor. The bug has
6928 been fixed by making things happen in the correct order.
6934 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6935 before the connection was closed, thus losing the rejection response.
6937 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6938 some early Solaris releases, but causes trouble in current releases where
6939 socklen_t is defined.
6941 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6944 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6947 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6948 that releasing the top of it at the end releases what was used for sub-
6949 expansions (unless the block got too big). However, discard this block if
6950 the first thing is a variable or header, so that we can use its block when
6951 it is dynamic (useful for very large $message_headers, for example).
6953 6. Lookups now cache *every* query, not just the most recent. A new, separate
6954 store pool is used for this. It can be recovered when all lookup caches are
6955 flushed. Lookups now release memory at the end of their result strings.
6956 This has involved some general refactoring of the lookup sources.
6958 7. Some code has been added to the store_xxx() functions to reduce the amount
6959 of flapping under certain conditions.
6961 8. log_incoming_interface used to affect only the <= reception log lines. Now
6962 it causes the local interface and port to be added to several more SMTP log
6963 lines, for example "SMTP connection from", and rejection lines.
6965 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6967 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6969 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6970 could be overwritten at the end of the current message (or the start of a
6971 new message if it was set in a HELO ACL). The value is now preserved for
6972 the duration of the SMTP connection.
6974 12. If a transport had a headers_rewrite setting, and a matching header line
6975 contained an unqualified address, that address was qualified, even if it
6976 did not match any rewriting rules. The underlying bug was that the values
6977 of the flags that permit the existence of unqualified sender and recipient
6978 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6979 non-local messages, and by -bnq for local messages) were not being
6980 preserved with the message after it was received.
6982 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6983 "next input=" as part of the text comprising the host identity instead of
6984 the correct text. The code was using the same buffer for two different
6985 strings. However, depending on which order the printing function evaluated
6986 its arguments, the bug did not always show up. Under Linux, for example, my
6987 test suite worked just fine.
6989 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6990 doesn't work with some older versions of Perl. It has been changed to "my",
6991 which in any case is probably the better facility to use.
6993 15. A really picky compiler found some instances of statements for creating
6994 error messages that either had too many or two few arguments for the format
6997 16. The size of the buffer for calls to the DNS resolver has been increased
6998 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6999 for addresses that have a lot of PTR records. This alleviates a problem; it
7000 does not fully solve it.
7002 17. A dnsdb lookup for PTR records that receives more data than will fit in the
7003 buffer now truncates the list and logs the incident, which is the same
7004 action as happens when Exim is looking up a host name and its aliases.
7005 Previously in this situation something unpredictable would happen;
7006 sometimes it was "internal error: store_reset failed".
7008 18. If a server dropped the connection unexpectedly when an Exim client was
7009 using GnuTLS and trying to read a response, the client delivery process
7010 crashed while trying to generate an error log message.
7012 19. If a "warn" verb in an ACL added multiple headers to a message in a single
7013 string, for example:
7015 warn message = H1: something\nH2: something
7017 the text was added as a single header line from Exim's point of view
7018 though it ended up OK in the delivered message. However, searching for the
7019 second and subsequent header lines using $h_h2: did not work. This has been
7020 fixed. Similarly, if a system filter added multiple headers in this way,
7021 the routers could not see them.
7023 20. Expanded the error message when iplsearch is called with an invalid key to
7024 suggest using net-iplsearch in a host list.
7026 21. When running tests using -bh, any delays imposed by "delay" modifiers in
7027 ACLs are no longer actually imposed (and a message to that effect is
7030 22. If a "gecos" field in a passwd entry contained escaped characters, in
7031 particular, if it contained a \" sequence, Exim got it wrong when building
7032 a From: or a Sender: header from that name. A second bug also caused
7033 incorrect handling when an unquoted " was present following a character
7034 that needed quoting.
7036 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
7037 was not being matched caselessly.
7039 24. Arranged for all hyphens in the exim.8 source to be escaped with
7042 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
7043 properly. Recipient callout cache records were still being keyed to include
7044 the sender, even when use_sender was set false. This led to far more
7045 callouts that were necessary. The sender is no longer included in the key
7046 when use_sender is false.
7048 26. Added "control = submission" modifier to ACLs.
7050 27. Added the ${base62d: operator to decode base 62 numbers.
7052 28. dnsdb lookups can now access SRV records.
7054 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
7055 the configuration file.
7057 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
7058 (-v) mode. This makes the output for a verbose queue run more intelligible.
7060 31. Added a use_postmaster feature to recipient callouts.
7062 32. Added the $body_zerocount variable, containing the number of binary zero
7063 bytes in the message body.
7065 33. The time of last modification of the "new" subdirectory is now used as the
7066 "mailbox time last read" when there is a quota error for a maildir
7069 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
7071 35. Added +ignore_unknown as a special item in host lists.
7073 36. Code for decoding IPv6 addresses in host lists is now included, even if
7074 IPv6 support is not being compiled. This fixes a bug in which an IPv6
7075 address was recognized as an IP address, but was then not correctly decoded
7076 into binary, causing unexpected and incorrect effects when compared with
7083 1. Very minor rewording of debugging text in manualroute to say "list of
7084 hosts" instead of "hostlist".
7086 2. If verify=header_syntax was set, and a header line with an unqualified
7087 address (no domain) and a large number of spaces between the end of the
7088 name and the colon was received, the reception process suffered a buffer
7089 overflow, and (when I tested it) crashed. This was caused by some obsolete
7090 code that should have been removed. The fix is to remove it!
7092 3. When running in the test harness, delay a bit after writing a bounce
7093 message to get a bit more predictability in the log output.
7095 4. Added a call to search_tidyup() just before forking a reception process. In
7096 theory, someone could use a lookup in the expansion of smtp_accept_max_
7097 per_host which, without the tidyup, could leave open a database connection.
7099 5. Added the variables $recipient_data and $sender_data which get set from a
7100 lookup success in an ACL "recipients" or "senders" condition, or a router
7101 "senders" option, similar to $domain_data and $local_part_data.
7103 6. Moved the writing of debug_print from before to after the "senders" test
7106 7. Change 4.31/66 (moving the time when the Received: is generated) caused
7107 problems for message scanning, either using a data ACL, or using
7108 local_scan() because the Received: header was not generated till after they
7109 were called (in order to set the time as the time of reception completion).
7110 I have revised the way this works. The header is now generated after the
7111 body is received, but before the ACL or local_scan() are called. After they
7112 are run, the timestamp in the header is updated.
7118 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
7119 before starting a queue runner without re-exec. This happened only when
7120 deliver_drop_privilege was set or when the Exim user was set to root. The
7121 effect of the bug was that timeouts during subsequent deliveries caused
7122 crashes instead of being properly handled. The handler is now left at its
7123 default (and expected) setting.
7125 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
7126 message, again when deliver_drop_privilege is set or Exim is run as root.
7127 The bug described in (1) was not present in this case, but the tidying up
7128 of the other signals was missing. I have made the two cases consistent.
7130 3. The ignore_target_hosts setting on a manualroute router was being ignored
7131 for hosts that were looked up using the /MX notation.
7133 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
7136 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
7137 operated on the sender address. After changing the $sender_address to <>
7138 for the sender address verify, Exim was re-instated it as the original
7139 (before rewriting) address, but remembering that it had rewritten it, so it
7140 wasn't rewriting it again. This bug also had the effect of breaking the
7141 sender address verification caching when the sender address was rewritten.
7143 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7144 This has been changed so that if the ip literal address matches
7145 ignore_target_hosts, the router declines.
7147 7. Added expansion conditions match_domain, match_address, and match_local_
7148 part (NOT match_host).
7150 8. The placeholder for the Received: header didn't have a length field set.
7152 9. Added code to Exim itself and to exim_lock to test for a specific race
7153 condition that could lead to file corruption when using MBX delivery. The
7154 issue is with the lockfile that is created in /tmp. If this file is removed
7155 after a process has opened it but before that process has acquired a lock,
7156 there is the potential for a second process to recreate the file and also
7157 acquire a lock. This could lead to two Exim processes writing to the file
7158 at the same time. The added code performs the same test as UW imapd; it
7159 checks after acquiring the lock that its file descriptor still refers to
7160 the same named file.
7162 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7163 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7166 11. Added the smtp_active_hostname option. If used, this will typically be made
7167 to depend on the incoming interface address. Because $interface_address is
7168 not set up until the daemon has forked a reception process, error responses
7169 that can happen earlier (such as "too many connections") no longer contain
7172 12. If an expansion in a condition on a "warn" statement fails because a lookup
7173 defers, the "warn" statement is abandoned, and the next ACL statement is
7174 processed. Previously this caused the whole ACL to be aborted.
7176 13. Added the iplsearch lookup type.
7178 14. Added ident_timeout as a log selector.
7180 15. Added tls_certificate_verified as a log selector.
7182 16. Added a global option tls_require_ciphers (compare the smtp transport
7183 option of the same name). This controls incoming TLS connections.
7185 17. I finally figured out how to make tls_require_ciphers do a similar thing
7186 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7187 before starting the TLS session.
7189 18. Tabs are now shown as \t in -bP output.
7191 19. If the log selector return_path_on_delivery was set, Exim crashed when
7192 bouncing a message because it had too many Received: header lines.
7194 20. If two routers both had headers_remove settings, and the first one included
7195 a superfluous trailing colon, the final name in the first list and the
7196 first name in the second list were incorrectly joined into one item (with a
7197 colon in the middle).
7203 1. Added -C and -D options to the exinext utility, mainly to make it easier
7204 to include in the automated testing, but these could be helpful when
7205 multiple configurations are in use.
7207 2. The exinext utility was not formatting the output nicely when there was
7208 an alternate port involved in the retry record key, nor when there was a
7209 message id as well (for retries that were specific to a specific message
7210 and a specific host). It was also confused by IPv6 addresses, because of
7211 the additional colons they contain. I have fixed the IPv4 problem, and
7212 patched it up to do a reasonable job for IPv6.
7214 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7215 delivery, the log line now contains "pipelined" if PIPELINING was used.
7217 4. An SMTP transport process used to panic and die if the bind() call to set
7218 an explicit outgoing interface failed. This has been changed; it is now
7219 treated in the same way as a connect() failure.
7221 5. A reference to $sender_host_name in the part of a conditional expansion
7222 that was being skipped was still causing a DNS lookup. This no longer
7225 6. The def: expansion condition was not recognizing references to header lines
7226 that used bh_ and bheader_.
7228 7. Added the _cache feature to named lists.
7230 8. The code for checking quota_filecount in the appendfile transport was
7231 allowing one more file than it should have been.
7233 9. For compatibility with Sendmail, the command line option
7241 and sets the incoming protocol and host name (for trusted callers). The
7242 host name and its colon can be omitted when only the protocol is to be set.
7243 Note the Exim already has two private options, -pd and -ps, that refer to
7244 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7245 "s", but I don't think that's a major issue.
7247 10. A number of refactoring changes to the code, none of which should affect
7250 (a) The number of logging options was getting close to filling up the
7251 32-bit word that was used as a bit map. I have split them into two classes:
7252 those that are passed in the argument to log_write(), and those that are
7253 only ever tested independently outside of that function. These are now in
7254 separate 32-bit words, so there is plenty of room for expansion again.
7255 There is no change in the user interface or the logging behaviour.
7257 (b) When building, for example, log lines, the code previously used a
7258 macro that called string_cat() twice, in order to add two strings. This is
7259 not really sufficiently general. Furthermore, there was one instance where
7260 it was actually wrong because one of the argument was used twice, and in
7261 one call a function was used. (As it happened, calling the function twice
7262 did not affect the overall behaviour.) The macro has been replaced by a
7263 function that can join an arbitrary number of extra strings onto a growing
7266 (c) The code for expansion conditions now uses a table and a binary chop
7267 instead of a serial search (which was left over from when there were very
7268 few conditions). Also, it now recognizes conditions like "pam" even when
7269 the relevant support is not compiled in: a suitably worded error message is
7270 given if an attempt is made to use such a condition.
7272 11. Added ${time_interval:xxxxx}.
7274 12. A bug was causing one of the ddress fields not to be passed back correctly
7275 from remote delivery subprocesses. The field in question was not being
7276 subsequently used, so this caused to problems in practice.
7278 13. Added new log selectors queue_time and deliver_time.
7280 14. Might have fixed a bug in maildirsizefile handling that threw up
7281 "unexpected character" debug warnings, and recalculated the data
7282 unnecessarily. In any case, I expanded the warning message to give more
7285 15. Added the message "Restricted characters in address" to the statements in
7286 the default ACL that block characters like @ and % in local parts.
7288 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7289 Three changes have been made:
7291 (a) There was a serious bug; a negative response to MAIL caused the whole
7292 recipient domain to be cached as invalid, thereby blocking all messages
7293 to all local parts at the same domain, from all senders. This bug has
7294 been fixed. The domain is no longer cached after a negative response to
7295 MAIL if the sender used is not empty.
7297 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7300 (c) A new callout option, "use_sender" has been added for people who want
7301 the modified behaviour.
7307 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7310 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7311 indeed breaks things for older releases.
7313 3. Added additional logging to the case where there is a problem reading data
7314 from a filter that is running in a subprocess using a pipe, in order to
7315 try to track down a specific problem.
7317 4. Testing facility fudge: when running in the test harness and attempting
7318 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7319 getting "No route to host". Convert this to a timeout.
7321 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7324 6. Some OS don't have socklen_t but use size_t instead. This affects the
7325 fifth argument of getsockopt() amongst other things. This is now
7326 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7327 can be set for individual OS. I have set it for SunOS5, OSF1, and
7328 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7329 some earlier ones do not.
7331 7. Change 4.30/15 was not doing the test caselessly.
7333 8. The standard form for an IPv6 address literal was being rejected by address
7334 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7335 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7336 this, as well as the form without the "IPv6" on the front (but only when
7337 address literals are enabled, of course).
7339 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7341 10. Exim crashed if a message with an empty sender address specified by -f
7342 encountered a router with an errors_to setting. This could be provoked only
7343 by a command such as
7347 where an empty string was supplied; "<>" did not hit this bug.
7349 11. Installed PCRE release 4.5.
7351 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7352 remained set. It is now erased.
7354 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7355 times from message ids (which are base 36 rather than the normal 62).
7357 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7358 were being counted as actual protocol errors, and logged if the log
7359 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7360 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7361 and DATA following a set of rejected RCPTs do not count as protocol errors.
7362 In other words, Exim assumes they were pipelined, though this may not
7363 actually be the case. Of course, in all cases the client gets an
7364 appropriate error code.
7366 15. If a lookup fails in an ACL condition, a message about the failure may
7367 be available; it is used if testing the ACL cannot continue, because most
7368 such messages specify what the cause of the deferral is. However, some
7369 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7370 that caused an old message to be retained and used if a later statement
7371 caused a defer, replacing the real cause of the deferral.
7373 16. If an IP address had so many PTR records that the DNS lookup buffer
7374 was not large enough to hold them, Exim could crash while trying to process
7375 the truncated data. It now detects and logs this case.
7377 17. Further to 4.21/58, another change has been made: if (and only if) the
7378 first line of a message (the first header line) ends with CRLF, a bare LF
7379 in a subsequent header line has a space inserted after it, so as not to
7380 terminate the header.
7382 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7383 unnecessarily, used atoi() instead of strtol(), and didn't check the
7384 termination when getting file sizes from file names by regex.
7386 19. Completely re-implemented the support for maildirsize files, in the light
7387 of a number of problems with the previous contributed implementation
7388 (4.30/29). In particular:
7390 . If the quota is zero, the maildirsize file is maintained, but no quota is
7393 . If the maildir directory does not exist, it is created before any attempt
7394 to write a maildirsize file.
7396 . The quota value in the file is just a cache; if the quota is changed in
7397 the transport, the new value overrides.
7399 . A regular expression is available for excluding directories from the
7402 20. The autoreply transport checks the characters in options that define the
7403 message's headers; it allows continued headers, but it was checking with
7404 isspace() after an embedded newline instead of explicitly looking for a
7407 21. If all the "regular" hosts to which an address was routed had passed their
7408 expiry times, and had not reached their retry times, the address was
7409 bounced, even if fallback hosts were defined. Now Exim should go on to try
7412 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7413 equivalent code in the SMTP transport. Some hosts send humungous responses
7414 to HELO/EHLO, more than 1024 it seems.
7416 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7417 gives compiler warnings in some environments. I've now done it "properly",
7420 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7421 (because of problems with the built-in one) was declared to return uschar *
7422 instead of char *, causing compiler failure.
7424 25. Fixed a file descriptor leak when processing alias/forward files.
7426 26. Fixed a minor format string issue in dbfn.c.
7428 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7430 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7431 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7434 29. When a sender address is verified, it is cached, to save repeating the test
7435 when there is more than one recipient in a message. However, when the
7436 verification involves a callout, it is possible for different callout
7437 options to be set for different recipients. It is too complicated to keep
7438 track of this in the cache, so now Exim always runs a verification when a
7439 callout is required, relying on the callout cache for the optimization.
7440 The overhead is duplication of the address routing, but this should not be
7443 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7444 to be verified with callout=postmaster, and the main callout worked but the
7445 postmaster check failed, the verification correctly failed. However, if a
7446 subsequent RCPT command asked for sender verification *without* the
7447 postmaster check, incorrect caching caused this verification also to fail,
7450 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7451 it was not caching the DNS options (qualify_single, search_parents) that
7452 were used when the lookup failed. A subsequent lookup with different
7453 options therefore always gave the same answer, though there were cases
7454 where it should not have. (Example: a "domains = !$mx_any" option on a
7455 dnslookup router: the "domains" option is always processed without any
7456 widening, but the router might have qualify_single set.) Now Exim uses the
7457 cached value only when the same options are set.
7459 32. Added John Jetmore's "exipick" utility to the distribution.
7461 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7462 than a timeout (e.g. a certificate is required, and is not provided), an
7463 Exim server now closes the connection immediately. Previously it waited for
7464 the client to close - but if the client is SSL, it seems that they each
7465 wait for each other, leading to a delay before one of them times out.
7467 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7468 maintained 0.8.x compatibility because I don't think many are using it, and
7469 it is clearly obsolete.
7471 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7474 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7475 client certificate was expired. A simple patch fixes this, though I don't
7476 understand the full logic of why the verify callback is called multiple
7479 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7480 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7481 which causes problems with some clients (such as the Certicom SSL Plus
7482 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7483 disables the coutermeasure allowing Eudora to connect."
7485 38. Exim was not checking that a write() to a log file succeeded. This could
7486 lead to Bad Things if a log got too big, in particular if it hit a file
7487 size limit. Exim now panics and dies if it cannot write to a log file, just
7488 as it does if it cannot open a log file.
7490 39. Modified OS/Makefile-Linux so that it now contains
7492 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7494 The two -D definitions ensure that Exim is compiled with large file
7495 support, which makes it possible to handle log files that are bigger than
7498 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7499 instance) a domain was checked against a named list that involved a lookup,
7500 causing $domain_data to be set, then another domain was checked against the
7501 same list, then the first domain was re-checked, the value of $domain_data
7502 after the final check could be wrong. In particular, if the second check
7503 failed, it could be set empty. This bug probably also applied to
7506 41. The strip_trailing_dot option was not being applied to the address given
7507 with the -f command-line option.
7509 42. The code for reading a message's header from the spool was incrementing
7510 $received_count, but never initializing it. This meant that the value was
7511 incorrect (doubled) while delivering a message in the same process in which
7512 it was received. In the most common configuration of Exim, this never
7513 happens - a fresh exec is done - but it can happen when
7514 deliver_drop_privilege is set.
7516 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7517 it now includes up to 150 characters of the unexpected data in the log
7520 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7521 and building data strings. The size of both of these buffers was 10 000
7522 bytes - far larger than anybody would *ever* want, thought I. Needless to
7523 say, somebody hit the limit. I have increased the maximum line length to
7524 20 000 and the maximum data length of concatenated lines to 100 000. I have
7525 also fixed two bugs, because there was no checking on these buffers. Tsk,
7526 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7527 buffer is too small.
7529 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7530 lsearch lookups. Now it does.
7532 46. When parsing a route_list item in a manualroute router, a fixed-length
7533 buffer was used for the list of hosts. I made this 1024 bytes long,
7534 thinking that nobody would ever have a list of hosts that long. Wrong.
7535 Somebody had a whole pile of complicated expansion conditions, and the
7536 string was silently truncated, leading to an expansion error. It turns out
7537 that it is easier to change to an unlimited length (owing to other changes
7538 that have happened since this code was originally written) than to build
7539 structure for giving a limitation error. The length of the item that
7540 expands into the list of hosts is now unlimited.
7542 47. The lsearch lookup could not handle data where the length of text line was
7543 more than 4095 characters. Such lines were truncated, leading to shortened
7544 data being returned. It should now handle lines of any length.
7546 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7547 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7550 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7551 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7552 no longer happens in comment lines. A list of replacements is now placed
7553 at the head of all of the source files, except those whose only change is
7554 to replace PERL_COMMAND in the very first #! line.
7556 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7557 messages on the queue, with a bottom-up merge sort, using code contributed
7558 by Michael Haardt. This should make operations like -bp somewhat faster on
7559 large queues. It won't affect queue runners, except when queue_run_in_order
7562 51. Installed eximstats 1.31 in the distribution.
7564 52. Added support for SRV lookups to the dnslookup router.
7566 53. If an ACL referred to $message_body or $message_body_end, the value was not
7567 reset for any messages that followed in the same SMTP session.
7569 54. The store-handling optimization for building very long strings was not
7570 differentiating between the different store pools. I don't think this
7571 actually made any difference in practice, but I've tidied it.
7573 55. While running the routers to verify a sender address, $sender_address
7574 was still set to the sender address. This is wrong, because when routing to
7575 send a bounce to the sender, it would be empty. Therefore, I have changed
7576 it so that, while verifying a sender address, $sender_address is set to <>.
7577 (There is no change to what happens when verifying a recipient address.)
7579 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7580 target A or AAAA records (if not already returned) without resetting the
7581 qualify_single or search_parents options of the DNS resolver. These are
7582 inappropriate in this case because the targets of MX and SRV records must
7583 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7584 target that, when qualified, matched something in the local domain. These
7585 two options are now turned off when doing these lookups.
7587 57. It seems that at least some releases of Reiserfs (which does not have the
7588 concept of a fixed number of inodes) returns zero and not -1 for the
7589 number of available inodes. This interacted badly with check_spool_inodes,
7590 which assumed that -1 was the "no such thing" setting. What I have done is
7591 to check that the total number of inodes is greater than zero before doing
7592 the test of how many are available.
7594 58. When a "warn" ACL statement has a log_message modifier, the message is
7595 remembered, and not repeated. This is to avoid a lot of repetition when a
7596 message has many recipients that cause the same warning to be written.
7597 However, Exim was preserving the list of already written lines for an
7598 entire SMTP session, which doesn't seem right. The memory is now reset if a
7599 new message is started.
7601 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7602 debugging output unless log_rewrite was also set.
7604 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7605 of (int)(handle) when we know that handle contains (void *)(-1).
7607 61. The Exim daemon panic-logs an error return when it closes the incoming
7608 connection. However "connection reset by peer" seems to be common, and
7609 isn't really an error worthy of noting specially, so that particular error
7612 62. When Exim is trying to find all the local interfaces, it used to panic and
7613 die if the ioctl to get the interface flags failed. However, it seems that
7614 on at least one OS (Solaris 9) it is possible to have an interface that is
7615 included in the list of interfaces, but for which you get a failure error
7616 for this call. This happens when the interface is not "plumbed" into a
7617 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7618 failure of the "get flags" call assumes that the interface is down.
7620 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7621 makes life easier for people who are doing arithmetic on fields extracted
7622 from dates, where you often get leading zeros that should not be
7623 interpreted as octal.
7625 64. Added qualify_domain to the redirect router, to override the global
7628 65. If a pathologically long header line contained very many addresses (the
7629 report of this problem mentioned 10 000) and each of them was rewritten,
7630 Exim could use up a very large amount of memory. (It kept on making new
7631 copies of the header line as it rewrote, and never released the old ones.)
7632 At the expense of a bit more processing, the header rewriting function has
7633 been changed so that it no longer eats memory in this way.
7635 66. The generation of the Received: header has been moved from the time that a
7636 message starts to be received, to the time that it finishes. The timestamp
7637 in the Received: header should now be very close to that of the <= log
7638 line. There are two side-effects of this change:
7640 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7641 logged header lines no longer include the local Received: line, because
7642 it has not yet been created. The same applies to a copy of the message
7643 that is returned to a non-SMTP sender when a message is rejected.
7645 (b) When a filter file is tested using -bf, no additional Received: header
7646 is added to the test message. After some thought, I decided that this
7649 This change does not affect the value of $received_for. It is still set
7650 after address rewriting, but before local_scan() is called.
7652 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7654 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7655 gave an unhelpful panic error message, and a defer error. I have managed to
7656 change this behaviour so that it now rejects any supplied certificate,
7657 which seems right, as the list of acceptable certificates is empty.
7659 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7660 gave an unhelpful defer error. I have not managed to make this reject any
7661 supplied certificates, but the error message it gives is "no certificate
7662 supplied", which is not helpful.
7664 70. exigrep's output now also includes lines that are not associated with any
7665 message, but which match the given pattern. Implemented by a patch from
7666 Martin Sluka, which also tidied up the Perl a bit.
7668 71. Recipient callout verification, like sender verification, was using <> in
7669 the MAIL FROM command. This isn't really the right thing, since the actual
7670 sender may affect whether the remote host accepts the recipient or not. I
7671 have changed it to use the actual sender in the callout; this means that
7672 the cache record is now keyed on a recipient/sender pair, not just the
7673 recipient address. There doesn't seem to be a real danger of callout loops,
7674 since a callout by the remote host to check the sender would use <>.
7675 [SEE ABOVE: changed after hitting problems.]
7677 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7678 temporary errors. However, in the case of such a code being given after
7679 the end of a data transmission (i.e. after ".") Exim was failing to write
7680 a retry record for the message. (Yes, there was some broken host that was
7681 actually sending 8xx at this point.)
7683 73. An unknown lookup type in a host list could cause Exim to panic-die when
7684 the list was checked. (An example that provoked this was putting <; in the
7685 middle of a list instead of at the start.) If this happened during a DATA
7686 ACL check, a -D file could be left lying around. This kind of configuration
7687 error no longer causes Exim to die; instead it causes a defer error. The
7688 incident is still logged to the main and panic logs.
7690 74. Buglet left over from Exim 3 conversion. The message "too many messages
7691 in one connection" was written to the rejectlog but not the mainlog, except
7692 when address rewriting (yes!) was being logged.
7694 75. Added write_rejectlog option.
7696 76. When a system filter was run not as root (that is, when system_filter_user
7697 was set), the values of the $n variables were not being returned to the
7698 main process; thus, they were not subsequently available in the $sn
7701 77. Added +return_path_on_delivery log selector.
7703 78. A connection timeout was being treated differently from recipients deferred
7704 when testing hosts_max_try with a message that was older than the host's
7705 retry timeout. (The host should not be counted, thus allowing all hosts to
7706 be tried at least once before bouncing.) This may have been the cause of an
7707 occasionally reported bug whereby a message would remain on the queue
7708 longer than the retry timeout, but would be bounced if a delivery was
7709 forced. I say "may" because I never totally pinned down the problem;
7710 setting up timeout/retry tests is difficult. See also the next item.
7712 79. The ultimate address timeout was not being applied to errors that involved
7713 a combination of host plus message (for example, a timeout on a MAIL
7714 command). When an address resolved to a number of possible hosts, and they
7715 were not all tried for each delivery (e.g. because of hosts_max_try), a
7716 message could remain on the queue longer than the retry timeout.
7718 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7721 81. Fixed an obscure SMTP outgoing bug which required at least the following
7722 conditions: (a) there was another message waiting for the same server;
7723 (b) the server returned 5xx to all RCPT commands in the first message so
7724 that the message was not completed; (c) the server dropped the connection
7725 or gave a negative response to the RSET that Exim sends to abort the
7726 transaction. The observed case was a dropped connection after DATA that had
7727 been sent in pipelining mode. That is, the server had advertised PIPELINING
7728 but was not implementing it correctly. The effect of the bug was incorrect
7729 behaviour, such as trying another host, and this could lead to a crash.
7735 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7736 and daemon.c were passed as pointers to ints; they should have been
7737 pointers to socklen_t variables (which are typically unsigned ints).
7739 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7742 3. Fixed a really odd bug that affected only the testing scheme; patching a
7743 certain fixed string in the binary changed the value of another string that
7744 happened to be identical to the end of the original first string.
7746 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7747 name", it returns that address as the IP address. On some operating
7748 systems (e.g. Solaris), it also passes back the IP address string as the
7749 "host name". However, on others (e.g. Linux), it passes back an empty
7750 string. Exim wasn't checking for this, and was changing the host name to an
7751 empty string, assuming it had been canonicalized.
7753 5. Although rare, it is permitted to have more than one PTR record for a given
7754 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7755 all the names associated with an address, because they do in Solaris.
7756 However, it seems that they do not in Linux for data that comes from the
7757 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7758 I found this out when I moved to a new Linux workstation and tried to run
7759 the Exim test suite.
7761 To get round this problem I have changed the code so that it now does its
7762 own call to the DNS to look up PTR records when searching for a host name.
7763 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7764 addresses that are only in /etc/hosts are still found.
7766 This behaviour is, however, controlled by an option called host_lookup_
7767 order, which defaults to "bydns:byaddr". If people want to use the other
7768 order, or indeed, just use one or the other means of lookup, they can
7769 specify it in this variable.
7771 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7772 some operating systems, this comes back from gethostbyaddr() as an empty
7773 string, and this is what Exim used to test for. However, it seems that in
7774 other systems, "." is yielded. Exim now tests for this case too.
7776 7. The values of check_spool_space and check_log_space are now held internally
7777 as a number of kilobytes instead of an absolute number of bytes. If a
7778 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7779 kilobyte. This means that much larger values can be stored.
7781 8. Exim monitor: an attempt to get the action menu when not actually pointing
7782 at a message produces an empty menu entitled "No message selected". This
7783 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7784 no entries in it ("Shell widget menu has zero width and/or height"). So I
7785 have added a single, blank menu entry in this case.
7787 9. Added ${quote_local_part.
7789 10. MIME decoding is now applied to the contents of Subject: header lines when
7792 11. Now that a reference to $sender_host_address automatically causes a reverse
7793 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7794 host lookup before query-style lookups in lists that might use this
7795 variable. This has therefore been abolished, and the "net-" prefix is no
7796 longer necessary for query-style lookups.
7798 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7799 have been a typo for LFLAGS, so it has been changed.
7801 13. The install script calls Exim with "-C /dev/null" in order to find the
7802 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7803 to be output. However, since Exim outputs its version number before the
7804 error, it didn't break the script. It just looked ugly. I fixed this by
7805 always allowing "-C /dev/null" if the caller is root.
7807 14. Ignore overlarge ACL variable number when reading spool file - insurance
7808 against a later release with more variables having written the file.
7810 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7811 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7812 this, as well as the form without the "IPv6" on the front.
7814 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7815 OS/Makefile-Darwin file.
7817 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7818 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7820 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7821 variable. However, some OS use ints for inodes. I've added cast to long int
7822 to get rid of the compiler warning.
7824 19. I had forgotten to lock out "/../" in configuration file names when
7825 ALT_CONFIG_PREFIX was set.
7827 20. Routers used for verification do not need to specify transports. However,
7828 if such a router generated a host list, and callout was configured, Exim
7829 crashed, because it could not find a port number from the (non-existent)
7830 transport. It now assumes port 25 in this circumstance.
7832 21. Added the -t option to exigrep.
7834 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7835 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7836 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7837 them is set, LOOKUP_LSEARCH is forced.
7839 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7841 24. Added sender and host information to the "rejected by local_scan()" log
7842 line; previously there was no indication of these.
7844 25. Added .include_if_exists.
7846 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7847 Linux. It turns out that not all file systems support this. Apparently some
7848 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7849 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7850 not supported on the file descriptor, is now ignored when Exim is trying to
7851 sync a directory. This applies only to Linux.
7853 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7855 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7856 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7859 29. Added support for maildirsize files from supplied patch (modified a bit).
7861 30. The use of :fail: followed by an empty string could lead Exim to respond to
7862 sender verification failures with (e.g.):
7864 550 Verification failed for <xxx>
7865 550 Sender verify failed
7867 where the first response line was missing the '-' that indicates it is not
7868 the final line of the response.
7870 31. The loop for finding the name of the user that called Exim had a hardwired
7871 limit of 10; it now uses the value of finduser_retries, which is used for
7872 all other user lookups.
7874 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7877 33. Exim was neglecting to zero errno before one call of strtol() when
7878 expanding a string and expecting an integer value. On some systems this
7879 resulted in spurious "integer overflow" errors. Also, it was casting the
7880 result into an int without checking.
7882 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7883 did not work. The code looks as if it has *never* worked, though it appears
7884 to have been documented since at least release 1.62. I have made it work.
7886 35. The "timeout_DNS" error in retry rules, also documented since at least
7887 1.62, also never worked. As it isn't clear exactly what this means, and
7888 clearly it isn't a major issue, I have abolished the feature by treating it
7889 as "timeout", and writing a warning to the main and panic logs.
7891 36. The display of retry rules for -brt wasn't always showing the error code
7894 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7895 timeout_connect_A, timeout_connect_MX.
7897 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7898 to the empty sender.
7900 39. The daemon was not analysing the content of -oX till after it had closed
7901 stderr and disconnected from the controlling terminal. This meant that any
7902 syntax errors were only noted on the panic log, and the return code from
7903 the command was 0. By re-arranging the code a little, I've made the
7904 decoding happen first, so such errors now appear on stderr, and the return
7905 code is 1. However, the actual setting up of the sockets still happens in
7906 the disconnected process, so errors there are still only recorded on the
7909 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7910 connections (as happens on some IP stacks) was logged at start up time as
7911 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7912 it from "IPv6 and IPv4", which means that two separate sockets are being
7915 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7916 says whether AF_INET or AF_INET6 was passed as an argument.
7918 42. Exiwhat output was messed up when time zones were included in log
7921 43. Exiwhat now gives more information about the daemon's listening ports,
7922 and whether -tls-on-connect was used.
7924 44. The "port" option of the smtp transport is now expanded.
7926 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7927 silently ignored. Now an error message is written to the main and panic
7930 46. There's a new ACL modifier called "logwrite" which writes to a log file
7931 as soon as it is encountered.
7933 47. Added $local_user_uid and $local_user_gid at routing time.
7935 48. Exim crashed when trying to verify a sender address that was being
7938 49. Exim was recognizing only a space character after ".include". It now also
7939 recognizes a tab character.
7941 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7942 extracting the relevant information from the specification. The man page no
7943 longer contains scrambled data for the -d option, and I've added a section
7944 at the front about calling Exim under different names.
7946 51. Added "extra_headers" argument to the "mail" command in filter files.
7948 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7951 53. Installed eximstats 1.29.
7953 54. Added transport_filter_timeout as a generic transport option.
7955 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7956 Cc: header lines. This was required by RFC 822, but it not required by RFC
7959 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7960 incoming messages that did not have them. Now it does so only if the
7961 message originates locally, that is, if there is no associated remote host
7962 address. When Resent- header lines are present, this applies to the Resent-
7963 lines rather than the non-Resent- lines.
7965 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7966 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7968 58. Messages for configuration errors now include the name of the main
7969 configuration file - useful now that there may be more than one file in a
7970 list (.included file names were always shown).
7972 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7973 for those rare installations that do not start the daemon as root or run it
7974 setuid root. I've cut out the call to initgroups() if the daemon is not
7977 60. The Exim user and group can now be bound into the binary as text strings
7978 that are looked up at the start of Exim's processing.
7980 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7982 62. Added $mailstore_basename variable.
7984 63. Installed patch to sieve.c from Michael Haardt.
7986 64. When Exim failed to open the panic log after failing to open the main log,
7987 the original message it was trying to log was written to stderr and debug
7988 output, but if they were not available (the usual case in production), it
7989 was lost. Now it is written to syslog before the two lines that record the
7990 failures to open the logs.
7992 65. Users' Exim filters run in subprocesses under the user's uid. It is
7993 possible for a "deliver" command or an alias in a "personal" command to
7994 provoke an address rewrite. If logging of address rewriting is configured,
7995 this fails because the process is not running as root or exim. There may be
7996 a better way of dealing with this, but for the moment (because 4.30 needs
7997 to be released), I have disabled address rewrite logging when running a
7998 filter in a non-root, non-exim process.
8004 1. The buildconfig auxiliary program wasn't quoting the value set for
8005 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
8006 not defined. This bug was masked in 4.22 by the effect that was fixed in
8009 2. Some messages that were rejected after a message id was allocated were
8010 shown as "incomplete" by exigrep. It no longer does this for messages that
8011 are rejected by local_scan() or the DATA or non-SMTP ACLs.
8013 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
8014 have allow_domain_literals set, the ID did not get logged in the <= line.
8015 Domain literals are now always recognized in Message-ID: header lines.
8017 4. The first argument for a ${extract expansion item is the key name or field
8018 number. Leading and trailing spaces in this item were not being ignored,
8019 causing some misleading effects.
8021 5. When deliver_drop_privilege was set, single queue runner processes started
8022 manually (i.e. by the command "exim -q") or by the daemon (which uses the
8023 same command in the process it spins off) were not dropping privilege.
8025 6. When the daemon running as "exim" started a queue runner, it always
8026 re-executed Exim in the spun-off process. This is a waste of effort when
8027 deliver_drop_privilege is set. The new process now just calls the
8028 queue-runner function directly.
8034 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
8037 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
8038 ignored. Though the use of -oP was forcing the writing of a pid file, it
8039 was always written to the default place.
8041 3. If the message "no IP address found for host xxxx" is generated during
8042 incoming verification, it is now followed by identification of the incoming
8043 connection (so you can more easily find what provoked it).
8045 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
8047 5. Added some features to "harden" Exim a bit more against certain attacks:
8049 (a) There is now a build-time option called FIXED_NEVER_USERS that can
8050 be put in Local/Makefile. This is like the never_users runtime option,
8051 but it cannot be overridden. The default setting is "root".
8053 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
8054 prefix string with which any file named in a -C command line option
8057 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
8058 is retained for -C and -D only if the caller of Exim is root. Without
8059 it, the exim user may also use -C and -D and retain privilege.
8061 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
8062 command line option is disabled.
8064 6. Macro names set by the -D option must start with an upper case letter, just
8065 like macro names defined in the configuration file.
8067 7. Added "dereference=" facility to LDAP.
8069 8. Two instances of the typo "uknown" in the source files are fixed.
8071 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
8072 the Configure-Makefile script screwed up while processing it.
8074 10. Incorporated PCRE 4.4.
8076 11. The SMTP synchronization check was not operating right at the start of an
8077 SMTP session. For example, it could not catch a HELO sent before the client
8078 waited for the greeting. There is now a check for outstanding input at the
8079 point when the greeting is written. Because of the duplex, asynchronous
8080 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
8081 way, but not yet received, when the check is performed.
8083 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
8084 on TCP/IP sockets, because this apparently causes some broken clients to
8087 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
8088 unchanged) from the Cygwin maintainer.
8090 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
8091 was supported instead of testing for mbx. Effectively a typo.
8093 15. The spa authenticator server code was not checking that the input it
8094 received was valid base64.
8096 16. The debug output line for the "set" modifier in ACLs was not showing the
8097 name of the variable that was being set.
8099 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
8101 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
8102 lookup on its own. Something else was needed to trigger the lookup. For
8103 example, a match in host_lookup or the need for a host name in a host list.
8104 Now, if $sender_host_name is referenced and the host name has not yet been
8105 looked up, a lookup is performed. If the lookup fails, the variable remains
8106 empty, and $host_lookup_failed is set to "1".
8108 19. Added "eqi" as a case-independent comparison operator.
8110 20. The saslauthd authentication condition could segfault if neither service
8111 nor realm was specified.
8113 21. If an overflowing value such as "2048M" was set for message_size_limit, the
8114 error message that was logged was misleading, and incoming SMTP
8115 connections were dropped. The message is now more accurate, and temporary
8116 errors are given to SMTP connections.
8118 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
8119 (except RSET) with a 421 error, until QUIT is received. However, it was
8120 failing to send a response to QUIT.
8122 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
8123 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
8124 ACL is now run after the helo_try_verify_hosts code.
8126 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
8127 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
8128 case-independent, so other case variants are also recognized). Apparently
8129 some systems use these upper case variants.
8131 25. If more than two messages were waiting for the same host, and a transport
8132 filter was specified for the transport, Exim sent two messages over the
8133 same TCP/IP connection, and then failed with "socket operation on non-
8134 socket" when it tried to send the third.
8136 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
8138 27. The extern definition of crypt16() in expand.c was not being excluded when
8139 the OS had its own crypt16() function.
8141 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8142 as a preferred synonym for return_size_limit, both as an option and as an
8145 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8147 30. Changed the default configuration ACL to relax the local part checking rule
8148 for addresses that are not in any local domains. For these addresses,
8149 slashes and pipe symbols are allowed within local parts, but the sequence
8150 /../ is explicitly forbidden.
8152 31. SPA server authentication was not clearing the challenge buffer before
8155 32. log_message in a "warn" ACL statement was writing to the reject log as
8156 well as to the main log, which contradicts the documentation and doesn't
8157 seem right (because no rejection is happening). So I have stopped it.
8159 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8160 However, I am unable to do any testing of this.
8162 34. Fixed an infelicity in the appendfile transport. When checking directories
8163 for a mailbox, to see if any needed to be created, it was accidentally
8164 using path names with one or more superfluous leading slashes; tracing
8165 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8167 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8168 contents are added to the log line that is written for every discarded
8169 recipient. (Previously a log_message setting was ignored.)
8171 36. The ${quote: operator now quotes the string if it is empty.
8173 37. The install script runs exim in order to find its version number. If for
8174 some reason other than non-existence or emptiness, which it checks, it
8175 could not run './exim', it was installing it with an empty version number,
8176 i.e. as "exim-". This error state is now caught, and the installation is
8179 38. An argument was missing from the function that creates an error message
8180 when Exim fails to connect to the socket for saslauthd authentication.
8181 This could cause Exim to crash, or give a corrupted message.
8183 39. Added isip, isip4, and isip6 to ${if conditions.
8185 40. The ACL variables $acl_xx are now saved with the message, and can be
8186 accessed later in routers, transports, and filters.
8188 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8189 strings in the file are not string-expanded.
8191 42. If a MAIL command specified a SIZE value that was too large to fit into an
8192 int variable, the check against message_size_limit failed. Such values are
8193 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8194 day this will have to be increased, but I don't think I want to be around
8195 when emails are that large.
8202 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8203 iconv() is not standard in FreeBSD.
8205 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8206 IPv6 enabled. The observed symptom was a segmentation fault on return from
8207 the function os_common_find_running_interfaces() in src/os.c.
8209 3. In the check_special_case() function in daemon.c I had used "errno" as an
8210 argument name, which causes warnings on some systems. This was basically a
8211 typo, since it was named "eno" in the comments!
8213 4. The code that waits for the clock to tick (at a resolution of some fraction
8214 of a second) so as to ensure message-id uniqueness was always waiting for
8215 at least one whole tick, when it could have waited for less. [This is
8216 almost certainly not relevant at current processor speeds, where it is
8217 unlikely to ever wait at all. But we try to future-proof.]
8219 5. The function that sleeps for a time interval that includes fractions of a
8220 second contained a race. It did not block SIGALRM between setting the
8221 timer, and suspending (a couple of lines later). If the interval was short
8222 and the sigsuspend() was delayed until after it had expired, the suspension
8223 never ended. On busy systems this could lead to processes getting stuck for
8226 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8227 process, before it forks any delivery processes. The open lookup caching
8228 mechanism meant that the open file or database connection was passed into
8229 the delivery process. The problem was that delivery processes always tidy
8230 up cached lookup data. This could cause a problem for the next delivery
8231 process started by the queue runner, because the external queue runner
8232 process does not know about the closure. So the next delivery process
8233 still has data in the lookup cache. In the case of a file lookup, there was
8234 no problem because closing a file descriptor in a subprocess doesn't affect
8235 the parent. However, if the lookup was caching a connection to a database,
8236 the connection was closed, and the second delivery process was likely to
8237 see errors such as "PGSQL: query failed: server closed the connection
8238 unexpectedly". The problem has been fixed by closing all cached lookups
8239 in a queue runner before running a delivery process.
8241 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8242 seem to have the "const" qualifier which it has on other OS. I've
8245 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8246 *of the same type* (client or server) with the same public name that an
8247 error should be diagnosed.
8249 9. When Exim looked up a host name for an IP address, but failed to find the
8250 original IP address when looking up the host name (a safety check), it
8251 output the message "<ip address> does not match any IP for NULL", which was
8252 confusing, to say the least. The bug was that the host name should have
8253 appeared instead of "NULL".
8255 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8256 user that is built into the binary, and the -C or -D options is used, root
8257 privilege is dropped before the configuration file is read. In addition,
8258 logging is switched to stderr instead of the normal log files. If the
8259 configuration then re-defines the Exim user, the unprivileged environment
8260 is probably not what is expected, so Exim logs a panic warning message (but
8263 However, if deliver_drop_privilege is set, the unprivileged state may well
8264 be exactly what is intended, so the warning has been cut out in that case,
8265 and Exim is allowed to try to write to its normal log files.
8271 1. smtp_return_error_details was not giving details for temporary sender
8272 or receiver verification errors.
8274 2. Diagnose a configuration error if two authenticators have the same public
8277 3. Exim used not to create the message log file for a message until the first
8278 delivery attempt. This could be confusing when incoming messages were held
8279 for policy or load reasons. The message log file is now created at the time
8280 the message is received, and an initial "Received" line is written to it.
8282 4. The automatically generated man page for command line options had a minor
8283 bug that caused no ill effects; however, a more serious problem was that
8284 the procedure for building the man page automatically didn't always
8285 operate. Consequently, release 4.20 contains an out-of-date version. This
8286 shouldn't happen again.
8288 5. When building Exim with embedded Perl support, the script that builds the
8289 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8290 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8292 6. The freeze_tell option was not being used for messages that were frozen on
8293 arrival, either by an ACL or by local_scan().
8295 7. Added the smtp_incomplete_transaction log selector.
8297 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8298 was accepting AUTH without a new EHLO.
8300 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8301 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8304 10. Logging of TCP/IP connections (when configured) now happens in the main
8305 daemon process instead of the child process, so that the TCP/IP connection
8306 count is more accurate (but it can never be perfect).
8308 11. The use of "drop" in a nested ACL was not being handled correctly in the
8309 outer ACL. Now, if condition failure induced by the nested "drop" causes
8310 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8311 or "require"), the connection is dropped.
8313 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8314 that yield "discard" can now be used with an "accept" or a "discard" verb,
8315 but an error is generated for any others (because I can't see a useful way
8316 to define what should happen).
8318 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8319 are now processed in the same way as lines in the Exim configuration file.
8320 In particular, continuation lines are supported.
8322 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8324 15. Added -ti meaning -t -i.
8326 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8327 domains, and warn by logging if others are found.
8329 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8330 returned from GIFCONF when Exim is trying to find the list of interfaces on
8331 a host. The code in os.c has been modified to copy each ifreq to an aligned
8332 structure in all cases.
8334 Also, in some cases, the returned ifreq's were being copied to a 'struct
8335 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8336 means the last couple of bytes of an IPv6 address could be chopped if the
8337 ifreq contained only a normal sockaddr (14 bytes storage).
8339 18. Named domain lists were not supported in the hosts_treat_as_local option.
8340 An entry such as +xxxx was not recognized, and was treated as a literal
8343 19. Ensure that header lines added by a DATA ACL are included in the reject log
8344 if the ACL subsequently rejects the message.
8346 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8347 MD5 (which is deprecated).
8349 21. When testing a filter file using -bf, Exim was writing a message when it
8350 took the sender from a "From " line in the message, but it was not doing so
8351 when it took $return_path from a Return-Path: header line. It now does.
8353 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8354 with a valid header line field name (a series of printing characters
8355 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8357 23. Changed "disc" in the source to "disk" to conform to the documentation and
8358 the book and for uniformity.
8360 24. Ignore Sendmail's -Ooption=value command line item.
8362 25. When execve() failed while trying to run a command in a pipe transport,
8363 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8364 could be confused with a return value of 69 from the command itself. This
8365 has been changed to 127, the value the shell returns if it is asked to run
8366 a non-existent command. The wording for the related log line suggests a
8367 non-existent command as the problem.
8369 26. If received_header_text expands to an empty string, do not add a Received:
8370 header line to the message. (Well, it adds a token one on the spool, but
8371 marks it "old" so that it doesn't get used or transmitted.)
8373 27. Installed eximstats 1.28 (addition of -nt option).
8375 28. There was no check for failure on the call to getsockname() in the daemon
8376 code. This can fail if there is a shortage of resources on the system, with
8377 ENOMEM, for example. A temporary error is now given on failure.
8379 29. Contrary to the C standard, it seems that in some environments, the
8380 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8381 program. Exim now does this explicitly; it affects the formatting of
8382 timestamps using strftime().
8384 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8385 complaints. I've now initialized all the variables, to avoid this.
8387 32. Header lines added by a system filter were not being "seen" during
8388 transport-time rewrites.
8390 33. The info_callback() function passed to OpenSSL is set up with type void
8391 (*)(SSL *, int, int), as described somewhere. However, when calling the
8392 function (actually a macro) that sets it up, the type void(*)() is
8393 expected. I've put in a cast to prevent warnings from picky compilers.
8395 34. If a DNS black list lookup found a CNAME record, but there were no A
8396 records associated with the domain it pointed at, Exim crashed.
8398 35. If a DNS black list lookup returned more than one A record, Exim ignored
8399 all but the first. It now scans all returned addresses if a particular IP
8400 value is being sought. In this situation, the contents of the
8401 $dnslist_value variable are a list of all the addresses, separated by a
8404 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8405 to accept a host name and all its aliases if the forward lookup for any of
8406 them yielded the IP address of the incoming connection. Now it accepts only
8407 those names whose forward lookup yields the correct IP address. Any other
8408 names are discarded. This closes a loophole whereby a rogue DNS
8409 administrator could create reverse DNS records to break through a
8410 wildcarded host restriction in an ACL.
8412 37. If a user filter or a system filter that ran in a subprocess used any of
8413 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8414 the wrong values were passed to the pipe command ($thisaddress had the
8415 value of $0, $0 had the value of $1, etc). This bug was introduced by
8416 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8418 38. Improved the line breaking for long SMTP error messages from ACLs.
8419 Previously, if there was no break point between 40 and 75 characters, Exim
8420 left the rest of the message alone. Two changes have been made: (a) I've
8421 reduced the minimum length to 35 characters; (b) if it can't find a break
8422 point between 35 and 75 characters, it looks ahead and uses the first one
8423 that it finds. This may give the occasional overlong line, but at least the
8424 remaining text gets split now.
8426 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8427 file descriptors might be low, and that setting 1000 would always raise it.
8428 It turns out that in some environments, the limit is already over 1000 and
8429 that lowering it causes trouble. So now Exim takes care not to decrease it.
8431 40. When delivering a message, the value of $return_path is set to $sender_
8432 address at the start of routing (routers may change the value). By an
8433 oversight, this default was not being set up when an address was tested by
8434 -bt or -bv, which affected the outcome if any router or filter referred to
8437 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8438 log only when "message" or "log_message" are set. However, if one of the
8439 conditions was an address verification, or a call to a nested ACL, the
8440 messages generated by the underlying test were being passed through. This
8441 no longer happens. The underlying message is available in $acl_verify_
8442 message for both "message" and "log_message" expansions, so it can be
8443 passed through if needed.
8445 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8446 new expansion $bh_ to give the encoded byte string without charset
8447 translation. Translation happens only if iconv() is available; HAVE_ICONV
8448 indicates this at build time. HEADERS_CHARSET gives the charset to
8449 translate to; headers_charset can change it in the configuration, and
8450 "headers charset" can change it in an individual filter file.
8452 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8453 that creates RFC 2047 encoded "words" labels them as that charset instead
8454 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8455 expansion operator; (ii) when Exim creates a From: line for a local
8456 message; (iii) when a header line is rewritten to include a "phrase" part.
8458 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8459 buggy, causing it to skip the first lines of messages whose message ID
8460 ended in 'D'. This would not have bitten before Exim release 4.14, because
8461 message IDs were unlikely to end in 'D' before then. The effect was to have
8462 incorrect size information for certain domains.
8464 45. #include "config.h" was missing at the start of the crypt16.c module. This
8465 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8468 46. If there was a timeout during a "random" callout check, Exim treated it as
8469 a failure of the random address, and carried on sending RSET and the real
8470 address. If the delay was just some slowness somewhere, the response to the
8471 original RCPT would be taken as a response to RSET and so on, causing
8472 mayhem of various kinds.
8474 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8475 when I implemented it. It didn't allow for the fact that some option values
8476 may legitimately be negative (e.g. size_addition), and it didn't even do
8477 the right test for positive values.
8479 48. Domain names in DNS records are case-independent. Exim always looks them up
8480 in lower case. Some resolvers return domain names in exactly the case they
8481 appear in the zone file, that is, they may contain uppercase letters. Not
8482 all resolvers do this - some return always lower case. Exim was treating a
8483 change of case by a resolver as a change of domain, similar to a widening
8484 of a domain abbreviation. This triggered its re-routing code and so it was
8485 trying to route what was effectively the same domain again. This normally
8486 caused routing to fail (because the router wouldn't handle the domain
8487 twice). Now Exim checks for this case specially, and just changes the
8488 casing of the domain that it ultimately uses when it transmits the message
8491 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8494 50. If a filter generated a file delivery with a non-absolute name (possible if
8495 no home directory exists for the router), the forbid_file option was not
8498 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8499 the existing equality matching.
8501 52. Exim was using ints instead of ino_t variables in some places where it was
8502 dealing with inode numbers.
8504 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8505 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8506 called TMPDIR, and if it finds it is different, it changes its value.
8508 54. The smtp_printf() function is now made available to local_scan() so
8509 additional output lines can be written before returning. There is also an
8510 smtp_fflush() function to enable the detection of a dropped connection.
8511 The variables smtp_input and smtp_batched_input are exported to
8514 55. Changed the default runtime configuration: the message "Unknown user"
8515 has been removed from the ACL, and instead placed on the localuser router,
8516 using the cannot_route_message feature. This means that any verification
8517 failures that generate their own messages won't get overridden. Similarly,
8518 the "Unrouteable address" message that was in the ACL for unverifiable
8519 relay addresses has also been removed.
8521 56. Added hosts_avoid_esmtp to the smtp transport.
8523 57. The exicyclog script was not checking for the esoteric option
8524 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8525 will work only if exicyclog is run under the appropriate euid.
8527 58. Following a discussion on the list, the rules by which Exim recognises line
8528 endings on incoming messages have been changed. The -dropcr and drop_cr
8529 options are now no-ops, retained only for backwards compatibility. The
8530 following line terminators are recognized: LF CRLF CR. However, special
8531 processing applies to CR:
8533 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8534 nor a local message in the state where . is a terminator.
8536 (ii) If a bare CR is encountered in a header line, an extra space is added
8537 after the line terminator so as not to end the header. The reasoning
8538 behind this is that bare CRs in header lines are most likely either
8539 to be mistakes, or people trying to play silly games.
8541 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8542 was being incorrectly given as 18 bytes larger than it should have been.
8543 This is a VOB (very old bug).
8545 60. This may never have affected anything current, but just in case it has:
8546 When the local host is found other than at the start of a list of hosts,
8547 the local host, those with the same MX, and any that follow, are discarded.
8548 When the list in question was part of a longer list of hosts, the following
8549 hosts (not currently being processed) were also being discarded. This no
8550 longer happens. I'm not sure if this situation could ever has previously
8553 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8556 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8557 header. This is something that is recommended in a new Internet Draft, and
8558 is something that is documented as being done by Sendmail. There are two
8559 possible values. For messages generated by the autoreply transport, Exim
8562 Auto-Submitted: auto-replied
8564 whereas for all other generated messages (e.g. bounces) it adds
8566 Auto-Submitted: auto-generated
8568 63. The "personal" condition in filters now includes a test for the
8569 Auto-Submitted: header. If it contains the string "auto-" the message it
8570 not considered personal.
8572 64. Added rcpt_include_affixes as a generic transport option.
8574 65. Added queue_only_override (default true).
8576 66. Added the syslog_duplication option.
8578 67. If what should have been the first header line of a message consisted of
8579 a space followed by a colon, Exim was mis-interpreting it as a header line.
8580 It isn't of course - it is syntactically invalid and should therefore be
8581 treated as the start of the message body. The misbehaviour could have
8582 caused a number of strange effects, including loss of data in subsequent
8583 header lines, and spool format errors.
8585 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8586 client host had authenticated. This control can now be exercised by an ACL
8587 for more flexibility.
8589 69. By default, callouts do not happen when testing with -bh. There is now a
8590 variant, -bhc, which does actually run the callout code, including
8591 consulting and updating the callout cache.
8593 70. Added support for saslauthd authentication, courtesy of Alexander
8596 71. If statvfs() failed on the spool or log directories while checking their
8597 size for availability, Exim confusingly gave the error "space shortage".
8598 Furthermore, in debugging mode it crashed with a floating point exception.
8599 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8600 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8601 serious problem, Exim now writes to the main and panic logs when this
8602 happens, with details of the failure. It then refuses to accept the
8603 incoming message, giving the message "spool directory problem" or "log
8604 directory problem" with a 421 code for SMTP messages.
8606 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8607 0, 1, and 2 exist, because some OS complain for execs without them (see
8608 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8609 descriptors. However, the code omitted to check that the open succeeded,
8610 causing mysterious errors if for some reason the permissions on /dev/null
8611 got screwed. Now Exim writes a message to the main and panic logs, and
8612 bombs out if it can't open /dev/null.
8614 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8615 interact so that it is all more flexible. It is supposed to remain
8616 backwards compatible. Also added extra_local_interfaces.
8618 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8619 to bomb out with an assertion failure - to the client this appears as a
8620 connection drop. This problem occurs in the part of the code that was taken
8621 from the Samba project. Fortunately, the assertion is in a very simple
8622 function, so I have fixed this by reproducing the function inline in the
8623 one place where it is called, and arranging for authentication to fail
8624 instead of killing the process with assert().
8626 75. The SPA client code was not working when the server requested OEM rather
8627 than Unicode encoding.
8629 76. Added code to make require_files with a specific uid setting more usable in
8630 the case where statting the file as root fails - usually a non-root-mounted
8631 NFS file system. When this happens and the failure is EACCES, Exim now
8632 forks a subprocess and does the per-uid checking as the relevant uid.
8634 77. Added process_log_path.
8636 78. If log_file_path was not explicitly set, a setting of check_log_space or
8637 check_log_inodes was ignored.
8639 79. If a space check for the spool or log partitions fails, the incident is now
8640 logged. Of course, in the latter case the data may get lost...
8642 80. Added the %p formatting code to string_format() so that it can be used to
8643 print addresses in debug_print(). Adjusted all the address printing in the
8644 debugging in store.c to use %p rather than %d.
8646 81. There was a concern that a line of code in smtp_in.c could overflow a
8647 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8648 initially expressed, the concern was not well-founded, because trailing
8649 spaces are removed early. However, if the trailing spaces were followed by
8650 a NULL, they did not get removed, so the overflow was possible. Two fixes
8653 (a) I re-wrote the offending code in a cleaner fashion.
8654 (b) If an incoming SMTP command contains a NULL character, it is rejected
8657 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8658 runs initgroups(), so that if the Exim user is in any additional groups,
8659 they will be used during message reception.
8665 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob